• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The relief valve (1), in particular an explosion protection valve, for arrangement on a wall opening (4) for relieving a work space (AR) can be produced simply and inexpensively, deposits being reduced on the valve seat. A first end face (DA1) and an opposite second end face (DA2) are provided on the sealing element (16) and form a first sealing surface (DF1) and an opposite second sealing surface (DF2). When the relief or explosion protection valve (1) is closed, the valve plate (15) lies sealingly on the first end face (DA1). On the sealing element (16) there is an internal, continuous sealing inner circumferential surface (23) which connects the first end face (DA1) and the second end face (DA2) and peripherally delimits the valve seat opening (VO). The sealing element (16) is arranged on the valve seat element (5) with an outer sealing outer peripheral surface (28) opposite the sealing inner peripheral surface (23). The valve seat element (5) has a first and a second valve seat component (5a, 5b), which are each formed with a central recess. The recess of the first valve seat component (5a) closer to the valve plate (15) has a smaller diameter than the recess of the second valve seat component (5b).
    公开号:AT521399A1
    申请号:T50604/2018
    申请日:2018-07-13
    公开日:2020-01-15
    发明作者:
    申请人:Hoerbiger Wien Gmbh；
    IPC主号:
    专利说明:

    Summary
    In order to provide a relief valve (1) which is simple and inexpensive to manufacture and with which deposits, in particular on the valve seat, can be reduced, the invention provides for a first end face (DA1) and a first end face (DA1) forming a first sealing surface (DF1) on the sealing element (16) Opposite, a second sealing surface (DF2) forming second end face (DA2) are provided, the valve plate (15) sealingly abutting the first end face (DA1) and the second end face (DA2) at least partially free when the relief valve (1) is closed is that on the sealing element (16) there is an internal, continuous sealing inner circumferential surface (23) which connects the first end face (DA1) and the second end face (DA2) and that the sealing element (16) with one of the sealing Inner circumferential surface (23) opposite, outer outer circumferential seal surface (28) which the first end face (DA1) and the second end face (DA 2) connects, is arranged on the valve seat element (5), and that the seal inner peripheral surface (23) delimits the valve seat opening (VO) peripherally.
    Fig. 2a
    858 AT
    relief valve
    The invention relates to a relief valve for arrangement on a wall opening of a wall of a work space to relieve the work space when a predetermined opening pressure in the work space is exceeded, with a valve seat element with a valve seat opening, with a valve plate which closes the valve seat opening in the closed state of the relief valve and one on the valve seat element between the valve seat element and the valve plate arranged sealing element, which is in contact with the valve plate in the closed state of the relief valve, the valve plate can be lifted from the sealing element when the predetermined opening pressure is exceeded to release the valve seat opening.
    Relief valves are used, for example, as explosion protection valves to relieve pressure in closed work spaces in the event of an explosion. Such workrooms can e.g. Be crankcase of internal combustion engines, which must be relieved in the event of an explosion from the sudden increase in pressure due to the explosion in the crankcase, in order to avoid damage in particular. However, there are also other closed work rooms that have to be protected by relief valves in the event of an explosion. Explosions are particularly at risk e.g. closed work rooms, in which powdery combustible media are handled, since a dust explosion can occur relatively easily here. Mixtures of dust and air are explosive if the dust consists of combustible material such as B. coal, flour, wood, cocoa, coffee, starch or cellulose. Inorganic substances and elements such as magnesium, aluminum and even iron and steel are also explosive (or at least flammable) in this form. In addition to the flammability, the small particle size of the dusts is crucial. H. the explosive effects increase with decreasing particle size, since this increases the surface of the dust particles. These effects mean that materials that are considered non-flammable in a compact form can burn in this finely divided form. Various electrical or mechanical effects with sufficient temperature and energy density can serve as the ignition source. A spark can suffice, the z. B. by pulling an electrical plug or malfunction in electrical equipment. Another major source of danger is electrostatic electricity, e.g. B. by electrostatically charged clothing, but also in funding (rubber conveyor belts or the like), which can generate considerable electrostatic voltages and charges due to their friction and movement. Other ignition sources are e.g. hot surfaces (e.g. in production environments), grinding or friction sparks and bearing damage.
    -12/26
    858 AT
    Explosion relief valves are generally known in the prior art. For example, the DK 91047 C, KR 101800799 B1, CN 204512564 U, DE 212012000084 U1, AT 6424 U1, AT 311129 B, ES 312337 A3, KR100928079 B1, KR100981453 B1, WO 09136674 A1, DD87441 A show explosion protection valves in various configurations, whereby for Sealing between the valve plate and the valve seat, an annular groove and a seal in the form of an O-ring is provided on the valve seat. A disadvantage of such an embodiment is, on the one hand, the relatively high manufacturing outlay for the valve seat, since in particular the groove for the O-ring has to be manufactured very precisely in order to ensure a good seal. Another disadvantage is that due to the contact of the valve seat with the work area, especially with aggressive media in the work area, high-quality, corrosion-resistant materials have to be used for the valve seat, which is cost-intensive. In addition, a gap forms on the valve seat in the area of the seal, where deposits can form, which is particularly important in sensitive hygiene applications, such as in the food or pharmaceutical industry, is disadvantageous. It is also not always possible to achieve a desired tightness and replacing the seal for maintenance purposes is relatively complex.
    It is therefore an object of the invention to provide a relief valve which overcomes these disadvantages. In particular, the relief valve should be simple and inexpensive to manufacture and deposits on the valve seat should be reduced, in particular avoided.
    According to the invention, the object is achieved in that a first end face forming a first sealing surface and an opposite second end face forming a second sealing surface are provided on the sealing element, the valve plate sealingly abutting the first end face and the second end face at least in the closed state of the relief valve It is partially free that an inner, continuous inner circumferential seal surface is provided on the sealing element, which connects the first end face and the second end face, and that the seal element has an outer outer seal outer circumferential surface opposite the inner seal surface, the first end face and the second end face connects, is arranged on the valve seat element, and that the seal inner peripheral surface peripherally limits the valve seat opening. By shielding the valve seat by means of the sealing element from a process medium in the work space, a less expensive material can be used to manufacture the valve seat element. In addition, less stringent requirements are placed on the manufacturing accuracy of the valve seat element, in particular on the flatness, as a result of which the valve seat can be manufactured more cost-effectively. The valve seat element can also be structurally simpler, which enables weight savings. In addition, the sealing element can also be used to seal against a / 26 2 '
    858 AT
    Mounting flange or serve against the wall, whereby a separate seal can be dispensed with.
    Advantageously, the relief valve has a fastening means for fastening the relief valve to the wall of the work space, a plurality of fastening screws being preferably provided as the fastening means, with which the relief valve can be screwed onto the wall of the work space. The advantage of screws is that they are inexpensive standard products and that they can be easily opened and screwed back on.
    A flame absorber is preferably provided in the relief valve to prevent the flame from spreading from the working space through the relief valve, the flame absorber preferably being designed in the form of a plate pack consisting of a plurality of sheet metal plates arranged one above the other. This can reliably prevent flames from escaping in the event of an explosion in the work area, which increases safety for people and reduces the risk of fire.
    The relief valve preferably has a suspension unit which is provided to preload the valve plate against the sealing element with a biasing force in the closed state of the relief valve, the suspension unit preferably being designed as a coil spring with a predetermined or variable spring characteristic, the predetermined spring characteristic preferably being a linear, progressive one or degressive spring characteristic is formed. This enables a simple and inexpensive standard machine element to be used.
    A circular valve seat opening and a corresponding circular valve plate are preferably provided, the sealing element being designed as a rotationally symmetrical sealing ring. This creates an essentially cylindrical relief valve that is simple and inexpensive to manufacture. Due to the circular shape of the openings, the valve plate and especially the sealing ring, a good sealing effect is achieved and deposits are reduced
    It is advantageous if the first end face and the seal inner circumferential surface form a first main sealing lip which is in contact with the valve plate when the relief valve is closed. It is also advantageous if the first end face and the outer circumferential sealing surface form a second main sealing lip, which is in contact with the valve plate when the relief valve is closed. This can improve the sealing effect.
    In order to further improve the sealing effect, at least one secondary sealing lip, which lies between the first and second main sealing lips, can be provided on the first end face and / or the second end face of the sealing element.
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    858 AT
    Preferably, a valve seat element protrusion extending inward in the direction of the valve seat opening is provided on the valve seat element and a seal element recess is provided on the outer circumferential seal surface for arranging the seal element on the valve seat element protrusion, the valve seat element according to an advantageous embodiment having a first disk-shaped valve seat component with a first central valve seat component recess and a movement has the second disk-shaped valve seat component adjacent to the valve plate with a second central valve seat component recess, the first valve seat component recess being smaller relative to the second valve seat component recess to form the valve seat element projection. As a result, the manufacture of the valve seat element and consequently the manufacture of the entire relief valve can be simplified and a good fit and simple assembly of the sealing element can be achieved.
    The present invention is explained in more detail below with reference to FIGS. 1a to 4b, which show exemplary, schematic and non-limiting advantageous embodiments of the invention. It shows
    1a a relief valve known in the prior art,
    1b is a detailed view of the valve seat,
    2a a relief valve according to the invention in the closed state,
    2b shows a detailed view of the valve seat of the relief valve according to the invention,
    3 the relief valve according to the invention in the open state,
    4a shows a sealing element of the relief valve according to the invention in a first embodiment and
    4b shows a sealing element of the relief valve according to the invention in a further embodiment.
    In Fig. 1 a known in the prior art cylindrical relief valve 1 is shown in a sectional view. The relief valve 1 is arranged on a wall opening 4 of a wall 3 of a closed work space AR in such a way that the relief valve 1 seals the work space AR against an environment AT of the closed work space AR when the relief valve 1 is closed. The relief valve 1 has a valve axis VA, an outer valve housing 2 and a valve seat element 5, which are connected by means of several clamping elements 6, here in the form of clamping screws 6a,
    -45/26
    858 AT are held together. Spacer elements 7 are arranged between the valve housing 2 and the valve seat element 5, which e.g. can be designed as (not shown) spacer sleeves around the clamping screws 6a or in one piece with the clamping screws 6a, as can be seen in FIG. 1. The spacer elements 7 are used to connect the valve housing 2 and the valve seat element 5 at a certain distance in the axial direction of the relief valve 1 from each other in a substantially rigid manner. Corresponding threaded bores 8 are provided in the valve seat element 5 for screwing in the clamping screws 6a, and screw nuts 9 are provided for firmly screwing the clamping screws 6a to the valve housing 2, which are screwed onto threaded sections of the clamping screws 6a which protrude beyond the valve housing 2.
    In the axial direction between the valve housing 2 and the valve seat element 5 and in the radial direction on the outside of the relief valve 1, a flame absorber 10 is arranged, which is designed here in the form of laminated laminations. In the event of an explosion in the work area AR, the flame barrier 10 serves to prevent any flames from penetrating through the relief valve 1 into the environment AT when the relief valve 1 is open. The relief valve 1 is fastened to the wall 3 with fastening means 11, here in the form of fastening screws 11a. Corresponding threaded bores 12 are provided in the wall 3 for screwing the fastening screws 11a. Again, a spacing element 7 can be arranged around the fastening means 11 between the valve housing 2 and the valve seat element 5, which in the example shown is designed as a spacing sleeve 7a.
    On the inside of the valve housing 2, a suspension unit 13 is arranged, which rests with one axial end on the valve housing 2 and whose opposite axial end rests on a valve plate 15. The suspension unit 13 prestresses the valve plate 15 in the closed state of the relief valve 1 with a defined pretensioning force Fv against the valve seat element 5 in order to close the wall opening 4 of the wall 3 and thus the working space AR. On the valve seat element 5, a sealing element 16 in the form of an O-ring is arranged between the valve plate 15 and the valve seat element 5, which seals the valve plate 15 against the valve seat element 5 (in the closed state of the relief valve 1).
    1b shows a detailed view of the area of the seal between valve plate 15 and valve seat element 5 marked in FIG. 1a. The sealing element 16, which is embodied here as an O-ring, is seated in a sealing groove 17 which runs around the valve seat element 5 in an essentially annular manner To achieve a sufficiently good sealing effect, the design of the sealing groove 17 is of crucial importance. The sealing groove 17
    -56/26
    858 AT has a complex geometry and must be very precise, i.e. are manufactured with small dimensional tolerances and must also be very smooth, i.e. have a low roughness and be flat. Naturally, this requires a high manufacturing effort, since the valve seat element 5 has to be mechanically processed, e.g. the surface of the valve seat element 5 facing the valve plate 15 must first be machined, e.g. by milling or turning and then the sealing groove 17 can be produced, which can be done, for example, by turning, provided that the sealing groove, as here, is a rotationally symmetrical sealing groove.
    The production of the valve plate, which is usually carried out by deep drawing, is relatively complex in the conventional design of the relief valve in order to achieve sufficient tightness. In particular, there are very high accuracy requirements for the flatness of the valve plate, which cannot always be met adequately.
    In addition to the relatively high manufacturing outlay for producing the sealing groove, in the closed state of the relief valve 1, a gap area 18 is formed in the area of the sealing element 16 between the valve plate 15 and the valve seat element 5, as shown in FIG. 1b. This gap area 18 is particularly disadvantageous when the relief valve 1 is used for hygiene applications, for example in the food or pharmaceutical industry, where there are sometimes very strict legal requirements regarding cleanliness. If in the work area AR e.g. perishable foods are handled, there is a risk that deposits form in the gap area 18, which can possibly lead to the formation of germs, which is disadvantageous in any case.
    In FIG. 1 a it can also be seen that the valve seat element 5 on the radially inner side is essentially in direct contact with the working space AR and the working medium handled therein. When the relief valve 1 is used with aggressive, highly corrosive media in the working space AR, it is generally necessary for the valve seat 5 to be made from a correspondingly corrosion-resistant and consequently expensive material, which is disadvantageous from an economic point of view.
    According to the invention, therefore, a relief valve 1 is designed with a specially shaped sealing element 16, as shown in FIGS. 2a, 2b and 3. Provided on the sealing element 16 are a first end face DA1 which forms a first sealing surface DF1 and an opposite second end face DA2 which forms a second sealing surface DF2, the valve plate 15 sealingly forming on the first end face DA1 or the formed sealing surface when the relief valve 1 is closed DF1, is present and the second end face DA2 is at least partially free. This means that the relief valve 1 when used with the free end face DA2 on a component,
    -67/26
    858 AT, for example, a wall 3 of a work area AR, can be arranged adjacent. The sealing element 16 also has an internal, continuous sealing inner circumferential surface 23 which connects the first end face DA1 and the second end face DA2. The seal element 16 is arranged on the valve seat element 5 with a seal outer circumferential surface 28 opposite the inner circumferential surface 23 of the seal, which connects the first end face DA1 and the second end face DA2. As a result of the configuration according to the invention, the sealing element 16 serves in addition to the seal between the valve plate 15 and also for the direct seal against a fastening flange 20 or against the wall 3, as a result of which a separate seal can be dispensed with (see FIGS. 1a and 1b seal between valve seat element 5 and wall 3 ).
    2a shows a sectional view of a relief valve 1 according to the invention with a valve axis VA, which is arranged at a wall opening 4 of a wall 3 of a work space AR. The structure of the relief valve 1 corresponds in principle to the relief valve 1 shown in FIG. 1a. The relief valve 1 has a valve housing 2 which is fastened to the wall 3 by means of a fastening means 11, here fastening screws 11a (not in the sectional plane), which in (not shown) threaded holes 12 of the wall 3 are screwed. The relief valve 1 has clamping elements 6 distributed over the circumference, in the example shown, clamping screws 6a, in order to hold the relief valve 1 axially together. On the outer ends of the clamping elements 6 facing away from the valve housing 2, support elements 19 can also be provided, which are designed here in the form of screw eyes, which are screwed onto threaded sections of the clamping screws 6a, for example. The relief valve 1 can be handled more easily by means of the carrying elements 19 or screw eyes, e.g. by being attached to a crane hook, which is particularly advantageous in the case of a heavy version of the relief valve 1, since it facilitates assembly.
    The relief valve 1 also has a suspension unit 13, which is designed here as a conical helical spring 14, preferably with a non-linear spring characteristic. A non-linear spring characteristic means that a spring stiffness c of the coil spring 14 changes depending on the path I by which the coil spring 14 is compressed, the path I in the specific case corresponding to the so-called valve stroke H x of the relief valve 1. The valve stroke H x is thus the distance between the closed position and the open position of the valve plate 15. The nonlinear spring characteristic can be designed progressively or degressively, the spring constant c increasing over a distance I with a progressive spring characteristic and over with a degressive spring characteristic the way I decreased. This can mean, for example, that to lift the valve plate 15 to the first 10% of the valve stroke H x a certain / 26 7 '
    858 AT first opening force Fo1 is required and to further lift the valve plate 15 to the second 20% of the valve stroke H a certain second opening force Fo2 is required, which is greater (progressive) or less (degressive) than the first opening force Fo1. The opening characteristics of the relief valve 1 can thus be determined by the design of the helical spring 14. Of course, a helical spring 14 with a linear spring characteristic could also be used, the spring constant c remaining constant over the path I (Fo1 = Fo2).
    However, it would of course also be conceivable that other types of springs are used as suspension units, such as Ring springs, Evolut springs, diaphragm springs, disc springs, etc. Also, for example, a known air spring could be used, which would have the advantage that the spring stiffness c and thus the opening characteristics of the relief valve 1 could be changed via the air pressure of the air spring. As a result, the relief valve 1 could be adapted very flexibly to various applications with variable opening pressure, the opening pressure corresponding to the pressure in the working space AR at which the valve plate 15 starts to lift off from the valve seat element 5.
    In the closed state of the relief valve 1, the valve plate 15 lies sealingly on the sealing element 16 and is arranged to be movable in the direction of the valve axis VA relative to the sealing element 16. The valve plate 15 closes the valve seat opening VO of the relief valve 1 in the closed state and releases the valve seat opening VO when the valve plate 15 is lifted off the sealing element 16, as a rule by the pressure applied to the valve plate 15. The relief valve 1 has, according to the invention, a special sealing element 16 and a valve seat element 5 which cooperates therewith. The second end face DA2 of the sealing element 16 opposite in the direction of the valve axis VA has a second, exposed sealing surface DF2. The first end face DA1 and the second end face DA2 are connected on the inside (facing the valve seat opening VO) by a continuous seal inner circumferential surface 23, the seal inner circumferential surface 23 simultaneously forming the peripheral boundary of the valve seat opening VO, and on the opposite side by a Seal outer peripheral surface 28 connected. By designing the sealing element 16 and in particular the sealing inner circumferential surface 23 as a continuous surface that forms the peripheral boundary of the valve seat opening VO, any joints in the region of the valve seat opening VO can be minimized as much as possible, whereby the risk of deposits on the relief valve 1 can be reduced, preferably avoided , The continuous seal inner circumferential surface 23 serves in particular to prevent unwanted
    -89/26
    858 AT
    Components such as dust or oil can flow away from the sealing element 16. This is particularly advantageous during the washing process of the relief valve 1 in hygienic applications, in order to avoid that the undesired constituents remain on the sealing element 16. At the same time, this embodiment of the sealing element 16 ensures that the valve seat element 5 is separated from the valve seat opening VO by the sealing element 16. Thus, the valve seat element 5 no longer comes into contact with a working medium in the working space AR, which means that the valve seat element 5 can be made simpler in terms of the materials used.
    The relief valve 1 can be arranged in a simple and reliable sealing manner on a component via the exposed second end face DA2. It can be advantageous if the second end face DA2 protrudes in the direction of the valve axis VA from the axial end of the relief valve 1, for example formed by the valve seat element 5, so that the sealing element 16 can be axially compressed with the fastening means 11 when it is arranged on the component, which means that Seal on the second sealing surface DF2 improved.
    The relief valve 1 can, for example, be attached directly to a wall 3 of a work space AR. However, a fastening flange 20 can also be provided, which is fastened to the wall 3 and to which the relief valve 1 is fastened. For this purpose, the relief valve 1 can also first be connected to the fastening flange 20 and then jointly on the wall 3.
    In the exemplary embodiment shown, the clamping screws 6a are screwed into a mounting flange 20, of course corresponding recesses are provided in the valve seat element 5, the valve seat element 5 having axially continuous recesses, preferably a through-hole through which the clamping screws 6a protrude, in order to attach the mounting flange 20 (or also to the wall 3) to be screwed down. However, the fastening flange 20 is only optional and offers, among other things, the advantage that a precisely defined sealing surface 21 can be provided as a support for the sealing element 16, which improves the sealing properties of the relief valve 1. The arrangement of a spacer element 20 is particularly advantageous in the case of dirty or uneven surfaces of the wall 3. In addition, the recess in the mounting flange 20 can be more easily adapted exactly to the valve seat opening VO, so that as far as possible no joints or gaps form between the mounting flange 20 and the sealing element 16. The central recess 20a in the mounting flange 20 can thus easily extend the valve seat opening VO flush and seamless in the axial direction. If no fastening flange 20 is provided, the sealing element 16 with the free second sealing surface DF2 of the second end face DA2 rests directly on the wall 3 of the working space AR instead of on the spacer element 20.
    -910 / 26
    858 AT
    In the exemplary embodiment shown, the relief valve 1 is essentially cylindrical with a round, preferably circular valve seat opening VO, the wall opening 4 of the wall 3 naturally also preferably having a round cross section. Accordingly, the valve plate 15, the valve seat element 5 and the fastening flange 20 in the example shown are essentially rotationally symmetrical about the valve axis VA. The sealing element 16 is consequently likewise designed as a rotationally symmetrical sealing ring. The bores for the clamping screws 6a and fastening screws 11a can of course be excluded from the rotational symmetry. The bores are arranged on a so-called bolt circle with a specific bolt circle diameter and are preferably spaced apart from one another on the bolt circle at constant angular intervals.
    The sealing element 16 is preferably designed such that the inner circumferential surface 23 of the seal forms a continuous, smooth, preferably joint-free peripheral boundary surface of the valve seat opening VO with the lateral surface 22 of the recess 20a of the mounting flange 20, which may be conical or cylindrical.
    The valve seat element 5 can be made in one part or, as in the exemplary embodiment shown, in two parts. Due to the two-part design of the valve seat element 5, the valve seat element 5 can be produced very easily and inexpensively, since the two valve seat components 5a, 5b are essentially structurally simple, disc-shaped components. The valve seat components 5a, 5b can thus be produced in a simple manner, for example by means of laser cutting from a plate of a suitable material, by continuous casting and subsequent sawing, etc. Of course, the valve seat element 5 could also be made in one piece, e.g. as a turned part.
    In the example shown, the valve seat element 5 has two valve seat components 5a, 5b adjoining one another in the direction of the valve axis VA of the relief valve 1. The first valve seat component 5a lies closer to the valve plate 15 in the axial direction than the second valve seat component 5b, as can be seen in FIG. 2b. The first valve seat component 5a has a first central valve seat component recess and the second valve seat component 5b has a second central valve seat component recess. The first valve seat component recess is smaller than the second valve seat component recess, that is to say, in the case of the cylindrical embodiment of the relief valve 1 shown, has a smaller diameter than the second valve seat component recess. The two valve seat components 5a, 5b are thus essentially disc-shaped with the same outer diameter but different thickness and different inner diameters, which are arranged one above the other. This configuration forms
    858 AT radially inwardly extending, for example substantially annular, valve element projection 24. Of course, such a valve element projection 24 protruding in the direction of the valve seat opening VO from the valve seat element 5 can also be designed in any other way, in particular also on a one-piece valve seat element 5. The valve element projection 24 is preferably designed to be closed over the circumference of the valve seat opening VO.
    The sealing element 16 is advantageously arranged with its sealing outer peripheral surface 28 on the valve element projection 24. For this purpose, the sealing element 16 has a corresponding sealing element recess 25 on the sealing outer circumferential surface 28, with which the sealing element 16 can be arranged on the valve element projection 24.
    Another advantage of the relief valve 1 according to the invention is the complete shielding of the valve seat element 5 from the working medium of the relief valve 1. As a result, the valve seat element 5, or the two valve seat components 5a, 5b of the valve seat element 5, can be produced from any suitable material and it does not necessarily have to be machinable material can be used, as is required in the prior art for mechanical machining of the sealing groove 17 for the O-ring. In particular when handling corrosive working media in the working area AR, the shielding of the valve seat element 5 from the working medium offers a clear advantage over conventional valves. By avoiding contact of the valve seat element 5 with the aggressive, corrosive atmosphere in the working space AR, it is not necessary, as previously, that a corrosion-resistant material is used to manufacture the valve seat element 5, but simple steel, e.g. Mild steel (S 235 JR) can be used, which leads to significant cost savings, especially for large versions of the relief valve 1. Other suitable materials would also be conceivable, e.g. Plastics or non-ferrous metals.
    As already mentioned, a flame absorber 10 is preferably also provided on the relief valve 1, which serves to ensure that in the event of a flame developing as a result of an explosion, no flames emerge from the relief valve 1 into the surrounding environment AT. This serves in particular as a safety measure for people who may be in the area or for fire protection if there are flammable materials, gases or other substances in the area AT outside of the relief valve 1. Such flame barriers 10 are known in the prior art, which is why they are not discussed in more detail here.
    In Fig.4a and Fig.4b two advantageous embodiments of the sealing element 16 are shown as examples in cross section. The concrete constructive design
    -1112/26
    858 AT of the sealing element 16 is of course left to the person skilled in the art and can vary depending on the application of the relief valve 1, e.g. depending on the temperature in the working area AR, depending on the working medium or depending on the pressure in the working area AR, etc. The sealing element 16 could have one or more circumferential sealing lips on the first end face DA1 facing the valve plate 15 and / or on the second end face DA2 facing away from the valve plate 15 (see FIGS. 4a + 4b). In Figure 4a, a first advantageous embodiment of the sealing element 16 is shown in cross section and in Figure 4b, a second advantageous embodiment. The sealing element 16 can essentially be produced from any suitable material, with common elastic materials preferably being used. For example, plastics, synthetic rubber, natural rubber or mixtures thereof with other materials would be conceivable. Sealing materials are known in the prior art and the person skilled in the art can select a suitable material for a specific application. In particular for hygiene applications such as in the food or pharmaceutical industry, care must be taken to ensure that a suitable sealing material is used.
    The sealing element 16 in FIG. 4 a has a sealing element recess 25 on the sealing outer peripheral surface 28, the lower recess surface 25 a of which is essentially parallel to the second sealing surface DF2 of the second end face DA2. The opposite upper recess surface 25b of the sealing element recess 25 is inclined at a certain pretension angle α to the first recess surface 25a, so that (in the non-installed state of the sealing element 16) there is a certain minimum distance a between the two recess surfaces 25a, 25b. This minimum distance a is preferably set in such a way that it is less than the axial projection extension b of the valve seat element projection 24 (see FIG. 2b). Due to the preferably elastic material of the sealing element 16, a certain pretensioning force can be generated with which the second recess surface 25b (in the installed state of the sealing element 16) is pressed onto the valve seat element projection 24. A substantially play-free fit of the sealing element 16 on the valve seat element projection 24 can thereby be ensured, the upper recess surface 25b preferably lying flat on the valve seat element projection 24 in the installed state of the sealing element 16 and thus being parallel to the lower recess surface 25a.
    A first and a second main sealing lip 27a, 27b are provided on the first (upper) end face DA1 of the sealing element 16, the first main sealing lip 27a being formed by the seal inner peripheral surface 23 and the first sealing surface DF1 and the second main sealing lip 27b by the first sealing surface DF1 and the seal 1213/26
    858 AT
    Outer peripheral surface 28 is formed. The main sealing lips 27a, 27b each have a round end with a certain radius R. The main sealing lips 27a, 27b cooperate sealingly with the valve plate 15 in the installed state of the sealing element 16, as can be seen in FIG. 2b. The exact number i of main sealing lips 27i and the exact structural design depend on the use of the relief valve 1, e.g. according to the expected maximum or minimum temperature in the work area AR, an expected pressure in the work area, the working medium or e.g. even after a required service life of the sealing element 16. For example, the first main sealing lip 27a, which in the closed state of the relief valve 1 (which is the normal case) lies against the valve plate inner surface 15a, could be long, narrow and designed with a small radius R in order to be as good as possible to nestle on the valve plate inner surface 15a in order to minimize the risk that deposits form in the area between the valve plate 15 and the first main sealing lip 27a. The main sealing lips 27a, 27b could also be dispensed with, in which case the first sealing surface DF1 would be essentially analogous to the second sealing surface in FIG. However, e.g. only a first (or second) main sealing lip 27a (or 27b) can be provided on the sealing element 16.
    For example, when the sealing element 16 is not installed, the inner circumferential surface 23 of the seal could already have a curvature, as is symbolized by the dashed line in FIG. 4 a, in order to conform even better to the inner surface 15 a of the valve plate when installed. In the installed state of the sealing element 16 and when the relief valve 1 is closed, the first main sealing lip 27a is preferably elastically deformed in order to exert a certain pretensioning force on the valve plate 15, as a result of which the sealing effect is improved. The curvature of the inner circumferential surface 23 of FIG. 2b shows that the entire sealing element 16 is subject to a certain deformation when the relief valve 1 is closed. This deformation can in turn depend on many parameters and influencing variables, e.g. the spring force with which the valve plate 15 presses on the sealing element 16, the sealing material, the temperature in the working space AR, etc.
    In the example shown in FIG. 4 a, the sealing element 16 has a substantially straight inner circumferential surface 23 with a sealing inclination β between the inner circumferential surface 23 and the second sealing surface DF2 of the second end face DA2. However, this sealing tendency β can also be variable over the length of the inner circumferential surface 23 of the seal, e.g. when the seal inner peripheral surface 23 is curved (dashed line in Fig.4a). On the (upper) first end face DA1 there are two additional sealing lips 29 between the two main sealing lips 27a, 27b
    -1314/26
    858 AT arranged, which rest in the closed state of the relief valve 1 on the valve plate inner surface 15a and improve the seal. At the ends of the secondary sealing lips 29 and also at the edges, curves with a certain radius R can also be provided. Due to the manufacturing process, there can usually be a certain minimum radius of the curves. Again, more or less or no secondary sealing lips 29 can be provided, depending on the application and the required sealing effect.
    In contrast to the embodiment according to FIG. 4a, the embodiment according to FIG. 4b also has secondary sealing lips 29 on the (lower) second end face DA2 in order to improve the sealing effect to the spacer element 20 (or to the wall 3). In addition, a projection 30 is provided between the second main sealing lip 27b and the sealing element recess 25, as a result of which the recess area 25b is enlarged and offers a better contact of the sealing element 16 on the valve seat element projection 24.
    The configuration of the sealing element 16 according to FIG. 4 a is preferably used for valve seat openings VO with diameters <500 mm and the configuration of the sealing element 16 according to FIG. 4 b is preferably used for valve seat openings VO with diameters> 500 mm.
    The illustrated variants of the sealing element 16 are of course only to be understood as examples. It can be seen that there is a very large scope for the person skilled in the art for the structural design of the sealing element 16 and that, depending on the specific application of the relief valve 1, there are also different configurations of sealing elements 16 in order to achieve the required sealing effect. Of course, only a first or second main sealing lip 27a, 27b could also be arranged, a plurality i of secondary sealing lips 29i could be arranged, or different preloads, curvatures and angles could be provided.
    Even if the relief valve 1 according to the invention was described on the basis of the advantageous cylindrical configuration, it should be noted at this point that other designs are also possible. For example, A relief valve 1 could also be provided for a wall recess 4 deviating from the cylindrical shape, for example for a triangular, rectangular or oval wall recess 4. The structural design can then be adapted to the shape of the wall recess 4. The essence of the invention, that is, the design of the sealing element 16 for the peripheral limitation of the valve seat opening VO and for shielding the valve seat element 5 from the valve seat opening VO remains the same.
    -14 ·
    15/26
    858 AT
    权利要求:
    Claims (10)
    [1]
    claims
    1. Relief valve (1) for arrangement on a wall opening (4) of a wall (3) of a work area (AR) to relieve the work area (AR) when a predetermined opening pressure in the work area (AR) is exceeded with a valve seat element (5), with a Valve seat opening (VO) and with a valve plate (15), the valve plate (15) closing the valve seat opening (VO) in a closed state of the relief valve (1) and one on the valve seat element (5) between the valve seat element (5) and the valve plate (15) arranged sealing element (16), which is in contact with the valve plate (15) in the closed state of the relief valve (1), the valve plate (15) when the predetermined opening pressure is exceeded to release the valve seat opening (VO) from the sealing element (16 ) can be lifted off, characterized in that on the sealing element (16) a first end face (DA1) forming a first sealing surface (DF1) and an opposite, a second D The second end face (DA2) forming the sealing surface (DF2) is provided, the valve plate (15) sealingly abutting the first end face (DA1) and the second end face (DA2) being at least partially free in the closed state of the relief valve (1) Sealing element (16) is provided an internal, continuous sealing inner circumferential surface (23) which connects the first end face (DA1) and the second end face (DA2) and that the sealing element (16) with one of the sealing inner circumferential surfaces (23) opposite outer seal outer peripheral surface (28), which connects the first end face (DA1) and the second end face (DA2), is arranged on the valve seat element (5), and that the seal inner peripheral surface (23) limits the valve seat opening (VO) peripherally.
    [2]
    2. relief valve (1) according to claim 1, characterized in that the relief valve (1) has a fastening means (11) for fastening the relief valve (1) on the wall (3) of the working space (AR), wherein as fastening means (11) A plurality of fastening screws (11a) are preferably provided, by means of which the relief valve (1) can be screwed onto the wall (3) of the working space (AR).
    [3]
    3. relief valve (1) according to claim 1 or 2, characterized in that in the relief valve (1) a flame absorber (10) is provided to avoid flame propagation from the work space (AR) through the relief valve (1) to the outside, the flame barrier ( 10) is preferably designed in the form of a plate pack consisting of a plurality of sheet metal plates arranged one above the other.
    -1516/26
    858 AT
    [4]
    4. relief valve (1) according to one of claims 1 to 3, characterized in that the relief valve (1) has a suspension unit (13) which is provided, the valve plate (15) in the closed state of the relief valve (1) with a biasing force (F v ) to bias against the sealing element (16), the suspension unit (13) preferably being designed as a helical spring (14) with a predefined or variable spring characteristic, the predefined spring characteristic preferably being designed as a linear, progressive or degressive spring characteristic.
    [5]
    5. relief valve (1) according to one of claims 1 to 4, characterized in that a circular valve seat opening (VO) and a corresponding circular valve plate (15) are provided, wherein the sealing element (16) is designed as a rotationally symmetrical sealing ring.
    [6]
    6. relief valve (1) according to any one of claims 1 to 5, characterized in that the first end face (DA1) and the seal inner peripheral surface (23) form a first main sealing lip (27a), which in the closed state of the relief valve (1) the valve plate (15) is in contact.
    [7]
    7. relief valve (1) according to one of claims 1 to 6, characterized in that the first end face (DA1) and the seal outer peripheral surface (28) form a second main sealing lip (27b), which in the closed state of the relief valve (1) the valve plate (15) is in contact.
    [8]
    8. relief valve (1) according to one of claims 1 to 7, characterized in that on the first end face (DA1) and / or the second end face (DA2) of the sealing element (16) at least one secondary sealing lip (29) is provided, which between the first and second main sealing lips (27a, 27b).
    [9]
    9. Relief valve (1) according to one of claims 1 to 8, characterized in that a valve seat element projection (24) extending inward in the direction of the valve seat opening (VO) is provided on the valve seat element (5) and that on the seal outer peripheral surface (28) Sealing element recess (25) for arranging the sealing element (16) on the valve seat element projection (24) is provided.
    [10]
    10. relief valve (1) according to claim 9, characterized in that the valve seat element (5) has a first disc-shaped valve seat component (5a) with a first central valve seat component recess and in the direction of movement of the valve plate (15) adjacent second disc-shaped valve seat component (5b)
    858 AT has a second central valve seat component recess, the first
    Valve seat component recess for forming the valve seat element projection (24) is smaller relative to the second valve seat component recess.
    -17 ·
    18/26
    Hoerbiger Kompressortechnik Holding GmbH
    1.4

    co
    19/26
    Hoerbiger Kompressortechnik Holding GmbH
    2.4
    LO

    CO
    DA2.DF2
    20/26
    Hoerbiger Kompressortechnik Holding GmbH
    3.4

    co
    21/26
    Hoerbiger Kompressortechnik Holding GmbH
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    同族专利:
    公开号 | 公开日
    KR20200000178U|2020-01-22|
    KR200494011Y1|2021-07-15|
    AT521399B1|2020-09-15|
    WO2020011881A1|2020-01-16|
    CN112368498A|2021-02-12|
    KR20210030934A|2021-03-18|
    CN208951368U|2019-06-07|
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    AT311129B|1970-02-13|1973-10-25|Hoerbiger Ventilwerke Ag|Explosion relief valve|
    US4366837A|1980-12-09|1983-01-04|Cummins Engine Company, Inc.|Early warning bypass valve assembly|
    AT6424U1|1998-10-21|2003-10-27|Hoerbiger Ventilwerke Gmbh|EXPLOSION RELIEF VALVE|
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    JPWO2008120349A1|2007-03-29|2010-07-15|株式会社巴技術研究所|Check valve|
    KR20090116312A|2008-05-07|2009-11-11|광산|Flame arrester|
    KR100981453B1|2008-12-11|2010-09-13|현우에스엠티 주식회사|Internal combustion engine cover for installing arrest|
    KR100928079B1|2009-08-31|2009-11-25|박수건|Maze type relief valve with flame arrester for a crankcase|
    CN201706024U|2010-04-29|2011-01-12|中冶京诚工程技术有限公司|Self-restoring explosion release valve|
    FI123375B|2011-04-13|2013-03-15|Waertsilae Finland Oy|Explosion safety valve|
    CN204512564U|2015-03-10|2015-07-29|广东康菱动力科技有限公司|Anti-explosion safety Decompression valves|
    FR3038960B1|2015-07-13|2017-08-11|De Dietrich|AN IMPROVED FIRE SAFETY VALVE|
    CN105570501B|2016-02-02|2018-07-06|石特阀门股份有限公司|A kind of new gas voltage stabilizing unloading valve|
    CN206988556U|2017-07-20|2018-02-09|浙江工业职业技术学院|A kind of explosion-proof solenoid valve|
    KR101800799B1|2017-08-24|2017-12-20|주식회사 프로세이브|Explosion relief valve|WO2021175690A1|2020-03-05|2021-09-10|Innova S.R.L|Rainproof flame arrester block|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50604/2018A|AT521399B1|2018-07-13|2018-07-13|Explosion protection valve|ATA50604/2018A| AT521399B1|2018-07-13|2018-07-13|Explosion protection valve|
    KR2020180003886U| KR200494011Y1|2018-07-13|2018-08-21|Relief valve|
    CN201821351423.8U| CN208951368U|2018-07-13|2018-08-21|Pressure reducing valve|
    KR1020217001024A| KR20210030934A|2018-07-13|2019-07-10|Relief valve|
    PCT/EP2019/068600| WO2020011881A1|2018-07-13|2019-07-10|Relief valve|
    CN201980045655.1A| CN112368498A|2018-07-13|2019-07-10|Pressure reducing valve|
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