• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    Portable decontamination device for performing contamination-causing work on an object placed on a wall, which device comprises an at least partially transparent rigid frame that defines a substantially airtight working chamber with an object receiving opening through which the frame over the object against the wall can be placed, at least one closable material opening leading into the working chamber, adapted for airtight connection of a material package outside the working chamber, an air inlet opening into the working chamber, for supplying ambient air to the working chamber, at least one opening into the working chamber air extraction connection, for extracting air from the workroom, at least two handling holes leading into the workroom, adapted for air-tight connection of airtight handling gloves, for performing work on the object in the workroom.
    公开号:NL2016232A
    申请号:NL2016232
    申请日:2016-02-05
    公开日:2016-10-10
    发明作者:Janssen Ruud
    申请人:Star Equipment B V；
    IPC主号:
    专利说明:

    Portable decontamination device for carrying out activities that cause contamination
    PREFACE
    As is well known, the release of asbestos can have very harmful health effects. When removing asbestos from buildings and the like, efforts are aimed at preventing these harmful asbestos particles from ending up in free air.
    To remove asbestos in a safe manner, a hermetic enclosure is often used, which ensures that no-one outside the enclosure can be exposed to asbestos fibers during asbestos removal work. Because the use of a revolving involves a complicated process, in which many safety measures have to be taken, it has been included in legislation that this can only be carried out by approved companies. A hermetic revetment is used when there is, for example, asbestos-containing sheet material, asbestos cardboard, asbestos cement in indoor application provided with a fastening system, bonded asbestos, spray asbestos, asbestos cord, etc.
    Setting up a hermetic vaccination works as follows. First, the area where the asbestos removal must take place is completely cleared of all objects that can be moved. In rooms where a lot of dust is present, it must be cleaned prior to the process in order not to influence measurements that must be taken during the work. The objects that cannot be moved are cleaned and then packaged in a foil.
    A plastic film is then applied to create a sealed airtight space in which the work must be carried out. This airtight space must be able to withstand the underpressure that must be generated in the space. Optionally, a double foil can be used which ensures that if the foil is damaged there is no direct contact with the ambient air.
    The sealed airtight space is then placed under reduced pressure by means of extractors, and sufficient air exchange is added to the space. The Dutch standard in 2016 is an under pressure of 20 Pascal. A filter can be placed in the exhaust as well as the supply of air from and into the room so that no asbestos fibers can escape to the ambient air.
    After the space has been brought to the required conditions, the workmen who are going to remove the objects containing asbestos may enter this space. However, for this the workers must be protected against any loose asbestos fibers. To this end, the workers must wear respiratory protection, such as a full-face mask driven by a fan and with a dust filter. In addition, workers must wear protective clothing that is dust-proof and equipped with a hood that must be placed over the spinning and tensioning straps of the mask. At the level of the wrists and ankles, the clothing is provided with elastics to ensure a good seal, so that no asbestos dust particles can penetrate. Workers must also wear suitable shoes or boots and gloves. In some cases, a helmet is also mandatory.
    A disadvantage of the above procedure is that it is complex, extensive and time-consuming. In addition, it is not an optimum situation for workers to wear respiratory protection and a full-face mask. In the Netherlands, for example, it has been determined that after 2 hours of work with respiratory protection and full-face masks, due to health reasons it is mandatory for at least 1 hour not to carry out work that requires respiratory protection. Compared to a situation without a mask, a full-face mask provides a limited view of what influences the work.
    After the remediation work, including decontamination, has taken place, a final inspection must be carried out. The cleaned site can only be released if the decontamination has been done correctly. The purpose of the final inspection is to determine that a room or outdoor location after removal or asbestos remediation meets the stated delivery requirements and that the rooms are accessible again for people without the risk of exposure to harmful asbestos fibers above the assessment criterion used.
    The way in which a shielded room or outdoor location where (from) asbestos has been removed in accordance with the applicable legal requirements must be checked for the presence of asbestos-containing residues is laid down by law in most countries.
    Such an inspection is usually accompanied by a visual inspection of the circumference or shielded space and a determination of the respirable asbestos fibers in air (final measurement) with the aim of testing the asbestos concentration in the air of the containment or shielded space against the determined space. legal concentration standard. This is followed by a report of the research results with a statement as to whether the remediation site delivered meets the requirements set in this standard (declaration of conformity).
    To achieve complete remediation, it is crucial that the generated air circulation (flow) in the enclosure is (as much as possible) uniform over the entire enclosure. This is a potential problem in particular in the corners of the enclosure. In other words, there should not be any blind spots where there is no or significantly less air circulation. After all, this gives rise to the local precipitation of the asbestos fibers, as a result of which contaminants are likely to be left behind and the remediation will not have been carried out in accordance with safety standards.
    It is therefore an object of the present invention to provide a decontamination device, and a corresponding method, with which work on an object placed on a wall, in particular an asbestos-containing object, can be carried out quickly, easily and efficiently. In addition, the aim is to ensure that the decontamination proceeds in such a way that it meets the quality standards and sufficient air circulation is generated so that no blind spots are created. As a result, the remediation will proceed optimally.
    FIGURES
    Figure 1 shows schematically, in perspective, a portable decontamination device according to a preferred embodiment of the invention.
    Figure 2 schematically shows, in perspective, a decontamination device shown in Figure 1 from its rear wall.
    Figure 3 shows, diagrammatically, a perspective view of a decontamination device placed for operation, shown in Figure 1.
    Figure 4 shows diagrammatically, in perspective, a further embodiment of a portable decontamination device according to the invention.
    Figures 5 and 6 show a schematic, portable decontamination device according to a preferred embodiment of the invention wherein the device hangs freely around an object.
    Figure 7 shows the construction of figures 5 and 6 with an indication of the construction that allows the device of figure 5 to be suspended freely around an object.
    DESCRIPTION
    The present invention relates to a portable decontamination device for performing contamination-causing work on an object placed on a wall. The portable decontamination device can be used, for example, for operations that are normally performed in a clean room.
    More specifically, the present invention relates to the removal of asbestos-containing objects such as asbestos-containing window sills, bushings or flange gaskets. The removal of objects containing asbestos is a process that involves risks, since asbestos, asbestos dust particles or asbestos fibers are / are harmful to the health of persons.
    The present invention has for its object to provide a portable device that can clean small-scale asbestos-containing elements in a fast and efficient manner. Hereby the nuisance is limited, but attention is also paid to meet the prevailing standards.
    In a first aspect, the invention provides a portable decontamination device for performing contamination-causing work on an object placed on a wall, which device comprises: an at least partially transparent rigid frame that defines a substantially airtight working chamber with an object; receiving opening through which the frame can be placed over the object against the wall; at least one closable material opening leading into the working chamber, adapted for airtight connection of a material package thereto outside the working chamber; an air inlet opening into the working chamber, for supplying ambient air to the working chamber, so that a positive air flow is created in the working chamber; at least one air extraction connection leading into the working chamber, for extracting air from the working chamber; at least two handling holes leading into the working chamber, adapted for airtight connection of airtight handling gloves, for performing work on the object in the working chamber.
    One of the advantages of the updated portable decontamination device is that a controlled space is created locally, namely the office, around the object. To perform the work, a person no longer has to enter a controlled space, but with the aid of the airtight handling gloves connected to the handling holes, access to the object from outside the workroom. This greatly reduces the exposure risk to almost zero.
    Therefore, a person does not have to wear special clothing, shoes, and / or a face mask as the person does not have to enter the office themselves. The person only needs to wear safety shoes and sometimes safety glasses and / or safety helmet as personal protective equipment.
    The frame is a rigid, preferably block-shaped frame, such that it is not distorted and can easily be placed over the object. In one embodiment, the frame can be produced from a transparent plastic material such as a polycarbonate or polymethyl methacrylate material. The plastic material can herein have antistatic properties, or be provided with an antistatic layer or coating. This makes the walls fiber-repellent and prevents asbestos fibers from adhering to the walls and being left behind after remediation. An additional advantage is that due to the high underpressure and the positive air flow, any released asbestos fibers are sucked off by the underpressure machine or vacuum cleaner prior to cleaning and are collected in the filter of the underpressure machine or vacuum cleaner. An additional advantage is that (preferably antistatic) walls no longer have to be cleaned after remediation and the cleaning activities are limited to the connections and the floor. Visibility for the user is also guaranteed.
    Optionally, other elements present in or on the device (other than the walls) can be provided with an antistatic coating.
    The antistatic effect can also be achieved by ionizing the asbestos fibers present through the airflow used. By giving both the walls and all other internal parts of the device (e.g. gloves) a charge that is equal to the charge of the fibers or asbestos particles, a repellent effect will be obtained. As a result, fibers and particles will no longer be inclined to adhere to the walls.
    According to the present invention, placing the frame over the object means that the object extends through the object receiving opening into the working chamber of the frame, such that a person has access to the object via the handling gloves.
    The shape of the object receiving opening is preferably adapted to the object. That is, with an elongated window sill, for example, the object receiving opening is also elongated such that the frame can be placed over the window sill. The shape of the object receiving opening is thus somewhat linked to the shape of the object.
    In addition, the inventors of the present invention found that an elongated shape of the device is preferred because it leads to a better positive air flow and a better remediation.
    As mentioned above, the contamination-causing work can relate to objects that include asbestos, where there is a chance that asbestos fibers will be released during the work.
    The contamination can also relate to other types of pollution, such as dust generation, chemical substances, etc.
    Via the air extraction connection, it is possible to extract air from the working chamber in such a way that an underpressure is created. This (initial) negative pressure during cleaning operations, visual inspection or final measurement is preferably between 20 and 250 Pascals, preferably around 200 Pascals. During the dismantling work, when the workmen perform fine work in the workroom via the airtight handling gloves, the underpressure is preferably around 80 Pascal. In combination with the positive air flow, this ensures that dust particles, asbestos fibers or the like are sucked out of the working chamber via the air extraction connection prior to cleaning and are collected by a filter intended for this purpose, for example a HEPA14 filter.
    The air exhaust connection is preferably designed to be suitable for connection to an air exhaust system. Such an air extraction system can be provided with a filter head with filter, the filter head preferably being connectable to the air exhaust connection. A suitable filter is, for example, a HEPA filter, such as a HEPA 14 filter. This filter will be important for the final release of the remediated site, whereby after cleaning an extra suction occurs by installing one or more filter heads on an air extraction connection, after which the number of fibers remaining on the filters is microscopically checked. Only if this number is below a set release limit can the workspace be released and the portable decontamination device dismantled.
    In particular, with a working chamber volume of approximately 0.25 m3, the air extraction system will have a power between 1000 and 1500 Watt, more preferably between 1100 and 1300 Watt, whereby the air extraction system can refresh at least 2 m3 of air per hour, preferably more can refresh 4m3 of air per hour
    In another embodiment, the air extraction system is to be understood as a vacuum device, wherein the vacuum device has, for example, a capacity to suck 5000 m 3 per hour.
    This ensures that the negative pressure and positive air flow within the device are efficiently achieved and can be maintained. The air extraction system preferably has controllable power, so that the underpressure during remediation - when the workmen carry out work via the airtight handling gloves - can be set lower, thereby increasing the fingerspitzengefühl.
    The position of the air extraction connection on the device can in principle be freely chosen. In particular, the air extraction connection is provided at the lowest possible position, that is, preferably as close as possible to or on the ground surface. This has the advantage that even heavier particles (which tend to fall on the bottom of the device) may already have been discharged by the air extraction system prior to final cleaning.
    In a further preferred form there is a second air extraction connection, to which an air extraction system can also be connected. This air extraction connection is preferably arranged in a corner or side that differs from that where the first connection is located. By providing a second air extraction connection, an air flow can be achieved that differs from the flow that is obtained if only one air extraction connection is present or active. A varying air flow can also be created by providing a different suction point and / or by alternating use of the different suction points. This ensures that any precipitated dust particles will still be removed due to the variation in air flow. The suction points are preferably put into use alternately, wherein at least one suction point must always be in operation.
    An additional advantage of providing multiple air extraction connections is the fact that the legally required underpressure in the device is guaranteed, even if a pressure drop occurs (for example, due to the presence of a cavity in the window sill to be cleaned). As soon as such a pressure drop is detected, a second or subsequent suction point can be activated as a result of which the pressure drop is collected and the legally established underpressure standard is retained. The inventors of the present invention found that even when, for example, a handling glove breaks and would have to be replaced during the remediation - worst case scenario - there is still underpressure, thereby preventing asbestos particles from ending up outside the portable decontamination unit.
    In a further example, the air exhaust connection and the air inlet are substantially spaced apart as much as possible in the working chamber.
    In a further or different embodiment, a first air extraction connection and an air inlet are positioned in a diagonal surface of the frame, wherein air extraction connection and the air inlet are preferably placed at the extreme corners of this diagonal surface, more preferably at the height of corners on a diagonal line. . This will ensure that a cross-air flow is created which is favorable for creating a positive air flow everywhere in the portable decontamination unit and therefore also beneficial for the remediation work as a whole.
    This has the advantage that the uniformity with which the air is extracted is as constant as possible over the entire working chamber. That is, all air present in the office is extracted as well as possible, not just part of it.
    In the embodiment where a second air extraction connection is present, this air extraction connection will preferably be provided at a position that differs from the position of the first air extraction connection and the air inlet. More preferably, this second connection is in a corner of the frame, this angle being different from the angle where the first connection and the air inlet are located.
    Again, this has the advantage that optimum air circulation is obtained everywhere in the portable decontamination unit.
    The aforementioned air inlet is preferably provided with a filter, so that in the event of a power failure any asbestos particles can still end up outside the portable decontamination unit.
    In a further or different embodiment, a second air inlet will be provided that actively brings air in by means of, for example, a compressor (active air inlet). It is important that the underpressure in the portable decontamination unit must continue to meet the requirements and standards set for it. By actively blowing air in, this has the advantage that any (precipitated) asbestos fibers are sucked out of the working chamber via the air extraction connection prior to the cleaning activities. This active air inlet is preferably provided with a non-return valve and means for bringing the air inlet into an open and closed state. These means preferably comprise a handle. The non-return valve prevents air with asbestos particles from escaping the portable decontamination unit from the inside of the portable decontamination unit in the event of an overpressure, for example as a result of a power failure causing the underpressure machine to fail.
    In a preferred form of the present invention, both a passive and an active air inlet will be provided. Where the passive air inlet automatically lets air through and therefore has a filtering effect, the active air inlet will actively bring in air through, for example, a compressor.
    The active air inlet will preferably be provided on the side where the passive air inlet is located. This active air inlet is preferably situated at the lowest possible position, i.e. preferably as close as possible to or on the ground surface.
    By providing one or more air inlets, the underpressure and the speed of the air circulation within the device can be controlled. If the underpressure is too high, there is a risk that the operator cannot perform the remediation work properly. This problem can be prevented by lowering the underpressure.
    In order to prevent particles from adhering or settling to the bottom, the bottom can also be provided with one or more air inlets or air intake systems, whereby a minimum of air circulation is provided on the bottom. Possible embodiments to accomplish this include a tubular instrument or hose with air delivery openings provided in the bottom of the device or a bottom liner coupled to an air inlet, the liner having openings disposed over the surface of the liner along which the air can flow in.
    Optionally, one or more corners of the working chamber can be provided with one or more profiles provided in these corners, which promotes air circulation at these corners. In a preferred form, the profile will round off the corner. This prevents the creation of a so-called "blind spot".
    In one embodiment, at least the corners adjacent to the side walls perpendicular to the air flow will be provided with one or more profiles since these corners are most susceptible to form as blind spots. In a further embodiment, all corners will be provided with one or more profiles.
    Another or further way to guarantee the air circulation within the device is to provide a plenum along which the supply or removal of air can take place. As a result, there are many narrow air inlets (for example 1000), so that a more uniform air flow can be created in the working room. In a preferred form, an end-side filter will be present as a distribution body.
    The aforementioned measures all individually and in combination contribute to ensuring optimum air circulation in the device and preventing or minimizing the occurrence of blind spots.
    In an example of the present invention, the at least one closable material opening is located on a short side wall of the frame.
    This is of particular importance when the object is relatively extended, and where it is desired that this object be brought out of the working room prior to cleaning and final inspection. By means of the closable material opening, this object in the packed state can easily be removed or channeled out via the side wall.
    In another example, the object receiving opening is opposite the at least two handling holes.
    The object is thus penetrated into the working chamber via a rear side, and a user can approach this object via a front side by means of the handling gloves.
    In yet another example, the device comprises a two-way lockable tool lock leading into the work chamber, for feeding and removing tools or other materials into the work chamber.
    This lock here comprises two covers, an input cover and an output cover. When inserting a tool into the working chamber, first open the input cover and place the tool in the interior of the lock. The input cover must then be closed before the output cover is opened.
    This has the advantage that it is made possible to introduce tools, and possibly other material, into and out of the working chamber, without contamination escaping to the outside through this lock.
    In a further example, the device comprises at least one tool-drive connection leading into the working chamber, for supplying energy from outside the working chamber for driving tools in the working chamber or, for example, from compressed air or via hydraulics.
    The energy can for example be used to activate tools that are present in the office. This can be, for example, a drill, hammer, or the like to remove the object from the wall. The tool can, for example, operate on electrical energy or compressed air or hydraulics, so that this energy can be carried from outside the working chamber via the tool drive connection into the working chamber.
    Providing a drive connection to compressed air makes it possible to connect a spray gun or the like, with which air can be blown into the device internally. This can be advantageous when cleaning the device after use (e.g. for blowing away remaining particles or fibers in the blind spots).
    The provision of a hydraulic drive connection makes it possible to connect tools such as a flange spreader, with which a lot of force must be created. A flange spreader is needed, for example, to spread two flanges that connect two pipelines with each other, so that the (asbestos-containing) gasket that is located between the flanges can be remediated.
    In a further example, the device comprises at least one air monitoring connection leading into the working chamber, such as an air pressure sensor connection, an air contamination sensor connection and a recording connection.
    These connections are preferably suitable for use in an asbestos environment, i.e. the connections are suitable such that asbestos cannot leak through these connections.
    The advantage of such connections is that the air pressure can be controlled, whereby the air extraction connection, ie the air extraction device, can be set harder or softer. It is therefore possible to control the air pressure with the help of a control loop.
    In addition, the air contamination sensor connection is suitable for measuring the air contamination after the work has been completed (so-called release). This is important to ensure that sufficient contamination has been extracted, so that the air that remains is relatively clean. Only when it has been established that the air meets certain predefined beauty criteria, may the portable decontamination device be removed from the wall and / or the object.
    In a preferred form the device comprises three air monitoring connections, one connection serving for permanent underpressure registration and at least two connections suitable for carrying out the final inspection that allow measuring and recording during the entire process (up to the release).
    A heating element can be provided that prevents condensation from occurring in the device.
    In a further example, the device comprises height-adjustable support means for securely placing the frame on a surface over the object.
    Such supporting means are, for example, trestles, wherein the device rests on the trestles when it is placed over the object. Since the supporting means are height-adjustable, it is hereby made possible to use the device for several applications, i.e. for several different objects. It is thus made possible to perform work on several objects at different heights with one device. In addition to trestles, a platform or scaffolding can also serve as support in this.
    In a still further example, the device further comprises clamping means, such as a suction cup, a tensioning band and punch, with which the frame can be clamped against the wall.
    This provides an even better sealing of the working chamber with the outside air, such that an underpressure can be created in the working chamber without leakage, i.e. without outside air leaking into the working chamber. This also creates a better guarantee, reducing the risk of the portable decontamination unit coming loose during remediation as a result of, for example, a push.
    In one example, the frame consists of two parts, each part comprising an object receiving opening, such that a first part of the frame can be placed over the object from a first direction and wherein a second part of the frame from a second direction, opposite to the first direction, can be placed over the object.
    Furthermore, the frame may comprise carrying handles for portable movement of the frame.
    The present device is suitable for placing on or on an object such as a wall, but also on, for example, a roof covering. In the present case the device will preferably be provided with a material lock consisting of two parts, being a 'dirty' space and a 'clean' space. The dirty area is suitable for receiving contaminated roof components. During the sluicing, the air in the dirty room is atomized by means of connections, so that any asbestos particles present in the air would settle on the ground. A connection for a nebulizing instrument can be provided for this purpose. Subsequently, the cleaned and packaged waste is channeled to the clean material sluice and all spaces are cleaned (whereby any precipitated asbestos particles are absorbed with a damp cloth.
    The renovation of a roof is usually done by building a stormproof enclosure around a building, in which the remediators must work with a suit and mask. In order to achieve a stormproof enclosure, it must be firmly anchored, which entails high costs. This is avoided by means of the device according to the present invention, which of course entails a significant reduction in costs.
    In a second aspect, the invention provides a portable decontamination device for performing contamination-causing work on an object, which device comprises: an at least partially transparent rigid frame that defines a substantially airtight working chamber with an object receiving opening with which the frame can be placed over the object; at least one closable material opening leading into the working chamber, adapted for airtight connection of a material package thereto outside the working chamber; an air inlet opening into the working chamber for supplying ambient air to the working chamber; at least one air extraction connection leading into the working chamber, for extracting air from the working chamber; at least two handling holes leading into the working chamber, adapted for airtight connection of airtight handling gloves, for performing work on the object in the working chamber.
    Such a portable decontamination device is suitable, for example, for removing an asbestos-containing material, for example a gasket, which is present with insulating material, or with flanges, bushes or the like which connect to the tubes.
    The main idea in this embodiment is that the decontamination device hangs freely, so it should not be supported by a wall, or trestles or the like.
    To accomplish this, the decontamination device can be attached to the object (e.g., tube) by means of tensioning tapes, hose clamps, or the like.
    In another embodiment, the object (e.g. tube) is provided with a structure, after which the decontamination device is placed against this structure, or attached, in order to thus carry out the work on the object.
    The frame of the decontamination device can here for instance be block-shaped.
    Preferably, the frame will comprise at least two object receiving openings, which are preferably present on corresponding sides of the frame. More preferably, the object receiving openings are arranged symmetrically and are of the same shape.
    In a further preferred form the frame will consist of two frame parts, wherein the dividing axis preferably runs through the object receiving opening.
    This has the advantage that the frame parts can be placed over a hanging object in a simple manner.
    The two frame parts are attachable to each other to form a complete frame again.
    In another embodiment, specifically for situations in which a device according to the present invention is to be provided around a flange connection, a construction is provided on the object that allows the device to be suspended freely around the tube wherein the device is supported by the tube. For this purpose, the device as already described above consists of two pyramidal frame parts, which can be attached to each other via a side bounded by an open surface. This side is provided with a recess that is suitable for receiving a tube. The recess is preferably a semicircle, so that when attaching the two frame parts, a completely circular recess is formed, suitable for receiving a tube. Consequently, that part of the tube to be cleaned is enclosed by the device.
    The recess is then bounded by a construction on the outside of the frame, so that no air and material can escape from the inside of the device to the outside.
    This construction preferably comprises 4 moon-shaped or semicircular elements, which together can form a cuff seal. In particular, two plate-shaped elements are provided, and two disc-shaped elements, the plate-shaped elements having a diameter larger than the disc-shaped elements.
    In particular, the two frame parts will be brought over the object (tube) to be cleaned via the object receiving openings and these frame parts will be fixed on the outside of the frame by the 4 elements, which are arranged around the tube. a flange or cuff-shaped construction. The whole is fixed by means of fastening elements and the frame will therefore be free hanging or floating attached to the tube and can also rotate freely around the object
    In a preferred form a recess is provided in the construction that allows work to be carried out outside the frame by means of electric, air-driven or hydraulically driven tools in the frame. This has the advantage that activities that are required can be carried out prior to actual remediation, whereby a safe environment is also created for the operator during these activities. When working on a flange connection, among other things, it may be necessary to "loosen" the connection (loosening the bolts that will cause them to become hand-tight). This work usually takes place before the actual remediation and can theoretically (in some cases) lead to the release of asbestos-containing particles. By having this work take place in the protected environment of the device according to the present invention, the operator is protected at all times.
    In a further embodiment, the device can be provided with suspension means, which allow to anchor the device to an upper point (e.g. ceiling). For this purpose, the frame can be provided with suspension points that allow the frame to be attached to an upper point by means of cables and / or ropes.
    It will be clear that this device can also be provided with the elements as described above, being connections, angle profiles, etc.
    The devices according to the present invention can be provided with visualization means that assist with the visual inspection during the final inspection and release of the site. These visualization means may, inter alia, comprise a (wireless) camera that is introduced into the device. Image transfer to, for example, a PC can then be done via a bluetooth connection or other connection. This method makes it possible to carry out the mandatory visual inspection of the remediated site in a more targeted manner.
    In a third aspect, the invention provides a method for performing contamination-causing work on an object such as an object placed on a wall or a free-hanging object, using a portable decontamination device as described above, comprising the steps of: the frame against the wall, over the object, or over the free-hanging object such that the object is substantially in the working chamber; applying air-sealing means; connecting an air extraction device to the at least one air extraction connection, and performing the work on the object in the working chamber via the handling holes and airtight airtight handling gloves connected thereto, wherein at least while performing the work via the air extraction device the air from the working chamber is sucked away.
    If the object is on a wall, the application of air-sealing means can be done by applying tape, glue, foil, sealing plates or the like, with which the rear of the frame can be airtightly connected to the wall.
    With a free-hanging object, a construction (such as a flange-shaped construction or a cuff) can be provided which will have an air-sealing effect.
    As already mentioned above, the work can be aimed at removing an object, placing an object, performing maintenance on an object, etc.
    Various aspects that are involved in embodiments of the methods according to the present invention, including the advantages thereof, correspond to aspects that are involved in the device according to the invention as already explained above.
    In one example, the provision of the air-sealing means comprises sealing the peripheral edge of the frame connecting to the wall substantially air-tight to the environment with one or more of a tape, foil and sealing plates.
    The peripheral edge thus basically forms the edge with which the frame is pressed against the wall or placed against it.
    In a further example, the frame is clamped against the wall or a free-hanging object with clamping means, such as comprising a suction cup and strap and punch.
    In another example, the frame is placed on height-adjustable support means placed on a surface over the object, which support means are secured against sliding on the surface.
    In yet another example, the air extraction device causes at least an initial underpressure of 80 Pa in the working chamber, more preferably 200 Pa. As the work is carried out, this negative pressure may decrease (taking into account the statutory minimum negative pressure that must be maintained, usually between 20 and 40 Pa). Pressure drops can be caused by inherent characteristics of the object to be remediated (for example, the presence of cavities in a window sill) or by air being sucked in from outside (determined by the user) or by - in a worst case scenario - a handling glove being broken and needs to be replaced.
    In a further embodiment use can be made of a continuously variable pressure control, wherein a negative pressure of at least 80 Pa is started, more preferably 200 Pa and in which the negative pressure, as soon as it falls back undesirably, is controlled by switching on a second extraction point .
    At least during the execution of the work, in an example the underpressure and contamination in the workroom are monitored by means of an air pressure sensor, air contamination sensor and recording equipment connected to a relevant connection. Preferably there is one connection for permanent underpressure registration. Two connections are provided for the final inspection, which can be used to check whether the air is sufficiently pure.
    In yet another example, the object (or a part thereof) is removed from the working chamber via a material package connected to the material opening.
    In a fourth aspect, the invention provides for the use of the device according to one or more of the examples of a device according to the present invention, for removing asbestos-containing objects fixed to a wall from a space.
    The object here is preferably an asbestos-containing window sill, an asbestos-containing pipe or a pipe protruding through a wall.
    The naming of the various aspects of the device, the method and the use thereof according to the invention should not be interpreted literally. With the chosen naming it is only intended to concisely articulate the idea behind the relevant aspect.
    The invention will now be elucidated with reference to the enclosed figures, which only serve to illustrate the invention and should not be construed as a limitation thereof.
    In the figures, the same reference numerals for the same aspects are used to improve their readability.
    DETAILED FIGURE DESCRIPTION
    Figure 1 schematically shows, in perspective, a portable decontamination device 1 in a preferred embodiment of the invention, for carrying out contamination-causing work on an object 3 placed on a wall 2, such as, for example, an asbestos-containing object.
    In the context of the present invention, contamination-causing work is understood to mean work on or with the object 3 as a result of which the ambient air can become undesirably contaminated with particles released from the object, such as for example during drilling, planing, polishing or another machining technique, but also for example when disassembling the object 3 from the wall 2 and / or mounting the object 3 on the wall 2.
    The device 1 comprises a rigid frame 4, such as a frame made of a metal profile, for example aluminum, or a suitable rigid plastic profile. In the frame 4, side walls are placed, as much as possible airtightly, including seen in the working arrangement of the device 1 according to figure 1, a front wall 16, an upper wall 17, a left side wall 18, a right side wall 19, a rear wall 20 and a bottom wall 21. One or more of the side walls is made of a transparent, light-transmitting material such as plexiglass. The front wall 16 and the top wall 17 are both preferably transparent. The remaining walls can, if desired, be made of a non-transparent plastic material or other sheet material.
    The frame 4 and the side walls 16, 17, 18, 19, 20 and 21 define a substantially airtight working chamber 5, wherein an object receiving opening 6 is formed in the rear wall 20 for placing over an object, such as the object 3. of the frame 4.
    A number of connections open into the working chamber 5, such as at least one closable material opening 7, an air inlet 8, for supplying ambient air to the working chamber 5, at least one air extraction connection 9, for extracting contaminated or removed from the working chamber 5 air and at least two handling holes 10, for carrying out work on an object present in the work chamber 5 by a person from outside the decontamination device 1 in the work chamber 5. The air inlet 8 is preferably provided with a dust filter, such as a filter known in practice under the name P3. Preferably the air inlet 8 will be located at the top in a corner of the device 1. Air extraction connection (s) 9 are preferably situated as low as possible on the ground surface, or alternatively located at the front or the side walls. Most preferably, they are located diagonally relative to the air inlet 8.
    The material opening 7 located in the left-hand side wall 18 is provided in the working chamber 5 with a closable lid or closable cap. The material opening 7 is adapted for and has dimensions for, during operation, discharging a disassembled object from the working chamber 5 through the material opening 7 to the outside. Of course, a new object can also be introduced into the working chamber 5 via the material opening 7, for mounting on a wall.
    Although not shown in Figure 1, a material opening 7 is also provided on the right-hand side wall 19 of the frame 4. A material opening 7 can of course also be provided on another side wall of the frame 4.
    In the preferred embodiment of the decontamination device 1 shown in Figure 1, four handling holes or manipulation openings 10 are formed in the front wall 16, that is to say opposite the object receiving opening 6. It will be understood that such handling holes 10 are also included or only in the upper wall 16, the bottom wall 21 and / or in the left-hand side wall 18 or the right-hand side wall 19 can be arranged.
    As shown in Figure 1, the locations where the air extraction connections 9 and the air inlet 8 open into the working chamber 5 are selected such that during operation an air flow is formed in the working chamber 5 which flows through the working chamber 5 as completely as possible. The air extraction connections 9 and the air inlet 8 are preferably spaced apart as much as possible, for example the air inlet 8 on the lower left side and an air extraction connection 9 on the upper right side of the working chamber 5. More preferably, the air extraction connections 9 and the air inlet 8 are diagonal placed apart.
    For inserting tools, such as for example a screwdriver, hammer, bit or other tool into the working chamber 5, in one embodiment of the decontamination device 1 according to the invention, a double-sided lockable tool lock 11 is provided in the working chamber 5. In the embodiment shown in Figure 1, an elongated, circular cylindrical shaped tool lock 11 is arranged in the top wall 17. The tool lock 11 extends from the outside into the working chamber 5 and is provided with a closing cap at both ends, for example by means of a screw or bayonet fitting.
    It is noted that the tool (preferably) can also be provided in the working chamber 5 prior to placing the frame over an object. With the tool lock 11, on the other hand, it is possible during operation, wherein the frame 4 is placed over the object, to easily introduce tools into the work chamber 5 without the risk of contamination of the outside air by contamination particles from the working chamber 5. For this purpose, the tool lock 11 is first opened outside the working chamber 5, the tool is then brought into the tool lock 11, the tool lock 11 is closed and then opened in the working chamber 5 and the tool is brought out of the tool lock 11 into the working chamber, whereafter the tool lock 11 is closed again.
    For using electrically or by means of, for example, compressed air or hydraulically driven tools in the working chamber 5, in an embodiment of the invention, the decontamination device 1 is provided with at least one tool-drive connection leading into the working chamber. In the embodiment of the decontamination device 1 shown in Figure 1, a compressed air connection 12, such as a compressed air valve, is arranged in the upper wall 17, which outlet opens into the working chamber 5. By means of this compressed air connection 12, compressed air can be supplied to this from outside the working chamber 5, for driving compressed air tools in the working chamber 5. Of course, more than one compressed air connection 12 can be provided, also on other side walls of the device.
    For driving a power tool, a suitable electricity connection is provided, such as, for example, a wall socket 33 near the right-hand side wall 19, which wall socket 33 can be connected to the electricity grid outside the decontamination device 1 in a manner known per se. In a preferred form, it is placed at the front in the upper corner.
    In order to monitor a sufficient underpressure and / or degree of contamination in the working chamber 5 during operation, furthermore, in an embodiment of the invention, at least three air monitoring connections leading into the working chamber, such as an air pressure sensor connection 14, an air contamination sensor connection and a registration connection 13 are provided. Such air monitoring connections are known per se in practice and require no further explanation for a person skilled in the art.
    Figure 2 shows a decontamination device 1 shown in Figure 1, schematically, in perspective, viewed against the rear wall 20. In the embodiment shown, the object receiving opening 6 extends over a part of the rear wall 20.
    The material opening 7 extends over a distance relative to the left-hand side wall 18 or the right-hand side wall 19 outside the working chamber 5, for airtight connection of a material package 25, such as one or two double-walled drain bag (s) or other type of package. The material package 25 can for instance be connected airtight to the material opening with an elastic ring arranged around the outwardly projecting part of the material opening 7, or by means of suitable clamping rings or the like. Via the connected material package 25, after opening the cap of the material opening 7, an object can be safely brought into the package for discharging the object, without risk of contamination of the ambient air. Material packages, such as double-walled waste bags, for use with the decontamination device according to the invention are known per se in the prior art.
    Figure 2 also shows airtight connection to the handling holes 10 and extending into the work chamber 5, but the work chamber 5 airtight handling gloves 26, for performing work on an object in the work chamber 5. A user (not shown) can introduce one or both hands into such a handling glove 26 from outside the decontamination device 1 and thus perform work on an object in the work chamber 5 without contact with the air in the working chamber 5. Handling gloves for the purpose of the invention are known per se in practice. The material of a handling glove 26 is preferably tailored to the type of contamination that is expected.
    The handling gloves 26 can be fixedly attached to a handling hole or manipulation opening 10 or be detachably connected thereto, for which purpose the handling holes 10 extend over a distance outside the working chamber 5, for airtight connection to a handling opening 10 by means of an elastic ring or band of a handling glove. Other than shown, the handling gloves 26 may also consist of a cylindrical handling bag or the like. During use, unused handling holes are naturally sealed to the outside air. This can be easily done by connecting or capping a handling glove 26 to each handling hole.
    In the preferred embodiment shown in Figure 1, the decontamination device 1 is provided with a block-shaped, elongated frame 4. The dimensions of the frame 4, both in length, width and height, and the dimensions of the object receiving opening 6 are selected inter alia on the basis of the dimensions of an object 3 to be processed, such as for instance a window sill or pipe or tube and the like. and sufficient space to perform operations on an object in the office 5. Practical dimensions of the portable decontamination device 1 are, for example, length 100-150 cm, width 30-50 cm and height 30-50 cm. The invention is of course not limited to these dimensions and the frame 4 can also be of a block-shaped design, such as, for example, elongated with a triangular cross-section, circular cylindrical, etc.
    For easy carrying and transport of the decontamination device 1, carrying handles 15 can be provided on the left and right side wall 18, 19.
    Figure 3 schematically shows, in perspective, the decontamination device 1 shown in Figure 1 in use, for removing an object 3, such as a window sill 3 mounted on the wall 2 of a space under a glass window 34.
    To this end, the frame 4 is placed with its object receiving opening 6 over the object to be processed, i.e. the window sill 3 and with the rear wall 20 against the wall 2. Such that the part of the object 3 protruding outside the wall 1 is located in the working chamber 5.
    Subsequently, the peripheral edge of the frame 4, which is situated against the wall or wall 2, is sealed as much as possible by means of airtight sealing means, such as, for example, connecting to said side walls 17, 18, 19 and 21 and the wall 2 and window 34 one or more of an adhesive plastic tape, foil and / or sealing plates. Of course, other suitable sealing means can be used for sealing the working chamber 5 in airtight manner to the ambient air. The sealing plates are used, for example, to seal larger or wider peripheral edges, such as, for example, along the pane 24 recessed into a rebate. In another embodiment, the device will automatically attach itself to the wall by means of the underpressure used.
    Next, at least one, preferably at least two of the air extraction connections 9, an air extraction device is connected (not shown), such as, for example, a vacuum cleaner known as Koala® for use in extracting asbestos-containing contamination. In accordance with regulations for removing asbestos-containing contamination, with such a vacuum cleaner in a decontamination device with a volume of approximately 0.25 m 3, a negative pressure of at least 80, more preferably 200 Pa, can be achieved in the working chamber.
    After the extraction device has been switched on, work can be carried out on the object 3 in the pressurized working chamber 5, via the airtight handling gloves 26 connected to the handling holes 10 and the airtightly connected thereto.
    The tools that may be required for the work may be brought into the working chamber 5 beforehand, that is to say prior to placing the frame 4 over the object 3, or via the present tool lock 11, as discussed earlier.
    In order to guarantee the engagement of the frame on or against the wall or wall 2, use can be made of clamping means in accordance with an embodiment of the invention. Such as, for example, when disassembling the window sill 3 from a suction cup 39 engaging the window pane 34 and tensioning strap 41 with tensioning means 42. The tensioning strap 41 is fastened on the one hand to the suction cup 39 placed on the pane 34 and on the other hand, for example with a hook 40 to a other object mounted on or against the wall or wall 2, such as a heating radiator or the like (not shown). The tensioning strap 41 can of course also be fastened via bolts or the like attached to the wall or wall 2 above and below the decontamination device 1.
    The decontamination device 1 can also be clamped, for example, by means of stamps or other per se known clamping material between, for example, two walls or walls of a space.
    For stable and firm support of the frame 4, provision is furthermore made for height-adjustable support means 36 to be placed on a base or floor 38, as shown schematically in Figure 3 in the form of height-adjustable trestles. These trestles 36 are herein secured against sliding on the substrate 38, for example by means of an adhesive tape 37. If necessary, a protective layer can first be laid on the substrate under the decontamination device 1 to be placed (not shown).
    In practice, in order to check and ensure that the object 3 is removed from the environment without or with as little contamination as possible, the underpressure and contamination in the working chamber 5 are monitored at least during the execution of the activities by means of a concerning air pressure sensor connection 14 connected air pressure sensor and air contamination sensor and recording equipment connected to a monitoring connection 13.
    For discharging the object from the working chamber 5, a material package is connected to the material opening 7, as described above.
    In particular for performing work on an object protruding through a wall or wall, such as a pipe, the invention provides in a further embodiment a decontamination device 45, such as schematically shown in perspective in Figure 4. The frame of the decontamination device 45 consists of two parts 46, 47, each part comprising an object receiving opening 48, such that the first part of the frame 46 can be placed over the object from a first direction or first end and wherein the second part 47 of the frame from a second direction or second end, opposite to the first direction, can be placed over the object.
    The connections and the like described with reference to the decontamination device 1 are distributed over the two frame parts 46, 47 in such a manner that, in the mounted state, the functions can be performed as described with reference to Figures 1, 2 and 3.
    Figures 5 to 7 show an embodiment of the present invention in which a contamination device 49 consists of two frame parts 50,51 which, when mounted, can fulfill their function as described. The peripheral edges of the mounted frame can be provided with reinforcements 55, such as, for example, metal cover plates. In one embodiment, a recess may be present (not a figure).
    The frame parts 50, 51 are divided by means of a diagonal axis 52 which run through object receiving openings 53, 54. Preferably, the object receiving openings 53, 54 are circular and suitable for passage of a tubular object 56.
    The frame parts 50, 51 can pass over an object to be cleaned (in this figure a flange connection of a free-hanging tube), a passage for the tube being formed by means of the object receiving openings 53, 54. The axis where the two frame parts 50, 51 meet is fixed by means of clamping means 55 such as tape.
    Fixation of the mounted frame to be attached to the object, a structure 57 is provided which ensures correct attachment and also ensures that the device remains correctly positioned, even when a high underpressure is applied.
    The structure 57 as shown in Fig. 6 in assembled form and Fig. 7 in disassembled form comprises moon-shaped or semicircular elements which, when assembled, form a sleeve around the tubular object 55 and at the object-receiving opening 53, 54.
    Two plate-shaped elements 58, 59 and two disc-shaped elements 60, 61 are provided, each of which, in the assembled state, forms a circle provided with an opening, the diameter of the opening being dependent on the diameter of the tubular object. By tightening fastening means 62, 63, the elements will be kept in assembled condition.
    The plate-shaped elements 58, 59 are mounted around the tubular object 56 in the mounted state on the outside of the mounted frame, whereby it is assembled by means of fastening means 62 into a circle.
    The disc-shaped elements 60, 61 are then also placed around the tubular object, whereby they will rest against the plate-shaped elements 58, 59. Fastening means 63 ensure that the disc-shaped elements 60, 61 remain correctly together.
    In the assembled state, the device 49 will be suspended or suspended from the tubular object thanks to the construction 57. The elements of the construction are preferably made of metal such as, for example, steel or aluminum.
    Both the plate-shaped and the disc-shaped elements will be able to freely rotate relative to each other in assembled form and the device can be placed around a free-hanging tube and rotated freely around it.
    The device 49 may further be provided with suspension means 64 for anchoring to an upper point such as a ceiling.
    The present invention is not limited to the examples as described above in connection with the various figures. In order to be able to correctly appreciate the scope of the invention, the following claims are relevant.
    权利要求:
    Claims (19)
    [1]
    A portable decontamination device for performing contamination-causing work on an object, which device comprises: an at least partially transparent rigid frame that defines a substantially airtight working chamber with an object receiving opening through which the frame can be mounted against the wall over the object be placed; at least one closable material opening leading into the working chamber, adapted for airtight connection of a material package thereto outside the working chamber; an air inlet opening into the working chamber for supplying ambient air to the working chamber; at least one air extraction connection leading into the working chamber, for extracting air from the working chamber; at least two handling holes leading into the working chamber, adapted for airtight connection of airtight handling gloves, for performing work on the object in the working chamber.
    [2]
    A portable decontamination device for performing contamination-causing work on an object, which device comprises: an at least partially transparent rigid frame that defines a substantially airtight working chamber with an object receiving opening through which the frame can be placed over the object; at least one closable material opening leading into the working chamber, adapted for airtight connection of a material package thereto outside the working chamber; an air inlet opening into the working chamber for supplying ambient air to the working chamber; at least one air extraction connection leading into the working chamber, for extracting air from the working chamber; at least two handling holes leading into the working chamber, adapted for airtight connection of airtight handling gloves, for performing work on the object in the working chamber.
    [3]
    Device according to claim 1 or 2, wherein the frame is block-shaped and antistatic.
    [4]
    Device as claimed in any of the foregoing claims, wherein the at least one closable material opening is located on a short side wall of the frame.
    [5]
    5. Device as claimed in any of the foregoing claims, wherein the air extraction connection and the air inlet open out as much as possible in the working chamber in the most remote way possible.
    [6]
    Device as claimed in any of the foregoing claims, wherein the device comprises a two-way lockable tool lock leading into the working chamber, for supplying and discharging tools into the working chamber.
    [7]
    Device as claimed in any of the foregoing claims, wherein the device is provided with a second air extraction connection, preferably on a wall different from the wall where a first air extraction connection is located.
    [8]
    Device as claimed in any of the foregoing claims, wherein the device is provided in one or more corners with one or more corner profiles, for promoting air circulation.
    [9]
    Device as claimed in any of the foregoing claims, wherein the device comprises at least one tool drive connection leading into the working chamber, for supplying energy from outside the working chamber for driving tools in the working chamber.
    [10]
    Device as claimed in any of the foregoing claims, wherein the device comprises at least one air monitoring connection leading into the working chamber, such as an air pressure sensor connection, an air contamination sensor connection and a registration connection.
    [11]
    Device as claimed in any of the foregoing claims, further comprising height-adjustable support means for firmly placing the frame on a surface over the object.
    [12]
    12. Device as claimed in claim 1, further comprising clamping means, such as comprising a suction cup and tensioning band and punch, for clamping the frame against the wall.
    [13]
    Device as claimed in any of the foregoing claims, wherein the frame consists of two parts, wherein each part comprises an object receiving opening, such that a first part of the frame can be placed over the object from a first direction and wherein a second part of the frame can be placed over the object from a second direction, opposite to the first direction.
    [14]
    Device as claimed in claim 13, wherein a structure is provided on each object-receiving opening, for hanging the structure free-hanging.
    [15]
    Device as claimed in claim 14, wherein the construction comprises 4 semicircular elements, which together can form a cuff seal.
    [16]
    A method for performing contamination-causing work on an object, comprising the steps of: placing a frame over the object, whether or not against a wall, such that the object is substantially in a working chamber; applying air-sealing means; connecting an air extraction device to the at least one air extraction connection, and performing the work on the object in the working chamber via the handling holes and airtight airtight handling gloves connected thereto, wherein at least while performing the work via the air extraction device the air from the working chamber is sucked away.
    [17]
    17. Method as claimed in claim 13, wherein applying the air-sealing means comprises sealing the peripheral edge of the frame connecting to the wall substantially airtight to the environment with one or more of a tape, foil and sealing plates.
    [18]
    A method according to any one of the preceding claims, wherein with the air extraction device at least an underpressure of 80 Pa, more preferably 200 Pa can be caused in the working chamber.
    [19]
    A method according to any one of the preceding claims, wherein at least during the execution of the work the underpressure and contamination in the working chamber are monitored by means of an air pressure sensor, air contamination sensor and recording equipment connected to a relevant connection.
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    同族专利:
    公开号 | 公开日
    EP3271084A1|2018-01-24|
    WO2016147061A1|2016-09-22|
    NL2016232B1|2017-05-02|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL1041230A|NL1041230B1|2015-03-18|2015-03-18|Portable decontamination device for performing contamination-causing work on an object placed on a wall.|
    NL2014874|2015-05-28|
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