• 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:

    公开号:BE1019743A3
    申请号:E201000388
    申请日:2010-06-30
    公开日:2012-12-04
    发明作者:Geert Ballet；Kurt Coppens
    申请人:Vergokan；
    IPC主号:
    专利说明:

    Improved fire-resistance iq hanging system DOMAIN OF THE INVENTION
    The present invention relates to the field of conduits, such as for electrical cables or other utilities. More particularly, the invention relates to an improved fire-resistant suspension system that can be anchored to a ceiling and that includes support brackets or similar profile sections that support cable duct systems, such as for traffic tunnels, more particularly road or train tunnels. The invention relates in particular to an improved support bracket for such a suspension system.
    BACKGROUND OF THE INVENTION
    Fires in tunnels are notorious because of their consequences and their difficult combat. It is of particular importance that utilities such as lighting, signage and communication equipment remain operational as much as possible. Accidental fires and experimental fires in tunnels have shown that the realized temperatures (up to 1370 ° C) are even considerably higher than with fires in a building (less than 1100 ° C). In tunnels the utilities and utility lines are usually hung high against the wall and more often against the ceiling. This is very convenient and cheap in terms of construction, it provides easy access for inspection and maintenance, and is usually the least disruptive to activities in the tunnel, such as train or road traffic. The disadvantage is that such tunnel equipment is the fastest and completely exposed to the heat in the event of a fire. It is therefore important that the suspension systems for such utilities and utility lines maintain their integrity for a minimal time under the heavy load conditions of a tunnel fire.
    The materials, designs and constructions used for utilities and utility pipes in tunnels are therefore subject to, and certified under, strict standards and codes, and compliance with these codes and standards is very strictly monitored by many governments. One such standard that can be applied is DIN 4102: "Brandhalten von Baustoffen und Bauteilen" (Fire behavior of building materials and components), section 12: "Circuit integrity maintenance of electric cable Systems, requirements and testing" (circuit integrity maintenance of electrical cable systems , requirements and testing). A more specific standard in preparation is, for example, ASTM WK23821 "New Test Methods for Tunnel Fire Resistance".
    Standard DIN 4102-12 distinguishes between standard systems that meet specific requirements and non-standard systems. Standard systems may be installed with any type of electrical cables that are themselves certified for circuit integrity maintenance. Non-standard systems may only be installed with the cables of the type and supplier with which they were tested.
    The test requirements of standard suspension systems within DIN 4102-12, for the installation of cables on cable ducts or ducts, specify a distance between the supports of 1200 mm and that the support itself consists of a hanging support with screwed or welded crossbeams or brackets and with in the vicinity of the tip of the bracket, an additional suspension connection that fixes the bracket to a threaded rod. The threaded rod and the attachment of the bracket to it serve to prevent the bracket from sliding down the rod and to prevent the hanging support from bending under the weight of the cable duct or channels, especially when heated. The width of the cable ducts is prescribed to be 400 mm, and the width of the cable ducts is prescribed as 300 mm. The brackets may also be screwed to a wall instead of a hanging bracket.
    A conventional standard hanging system according to DIN 4102-12 can be described with reference to figure 1. The hanging support 21 is anchored to the ceiling with the aid of two bolts 23 screwed into fire-resistant plugs that require two holes to be drilled into the ceiling. The anchoring of the threaded rod to the ceiling is placed at the correct distance from the hanging support, and uses a third bolt 23 and fire-resistant plug, which requires a third hole to be drilled in the ceiling, and this at the correct distance from the other two holes drilled for anchoring the hanging bracket. One or more brackets 22 are screwed against the hanging support 21, in each case by means of two bolts and nuts. Usually after placing the cable ducts or channels on the brackets 22, the tip of each bracket 22 is fixed to the threaded rod. This is achieved by placing the threaded rod in the correct position, by passing it through the (wireless) sleeve 29 which is screwed with bolts 24 to the end of the bracket 22 and by screwing the end of the threaded rod to the anchoring point by means of two nuts. The position of the wireless sleeve 29 of the bracket 22 is then fixed on the threaded rod by screwing one locking nut 26 above the attachment point and a second locking nut 26 below the attachment point. Locking rings are usually provided with each of the nuts. Since the threaded rods can have different diameters, adapted nuts, locking rings and connection sleeves must be provided depending on the diameter of the threaded rod.
    The standard suspension system may contain up to 3 brackets. If more than one bracket is to be provided, the threaded rod is provided for the sake of ease of assembly in sections which are connected to each other on site by means of a connecting sleeve with screw thread 28. The lengths of the sections of the threaded rod can be chosen in such a way that the connecting sleeve 28 can replace one of the lock nuts 26, usually the nut above the attachment point.
    Bringing the threaded rod into the correct position, screwing it to the anchor point, positioning the nuts for fixing the sleeve of the bracket to the threaded rod, and especially the assembly of the sections of the threaded rod in the case more than one bracket must be attached is very time-consuming. Drilling three holes in the ceiling, at the right distances from each other, requires precision and increases the complexity and time required for installing the suspension system.
    Screwing the brackets to the hanging support with two screws is another increase in complexity, even if this assembly is prefabricated in the workshop, thereby detracting from the easy transport of the assembly and anchoring the assembly to the ceiling.
    Tunnels can be several kilometers long, such as for example the 50 km "Channel Tunnel" between England and France, and therefore require several thousands of fire-resistant suspension systems. Thus, there is a need for a more convenient and less time-consuming design of the suspension system, where it is preferable that the suspension system continues to satisfy as a standard suspension system within the DIN 4102-12 standard.
    The present invention has for its object to obviate or at least limit the problem described above and / or to make improvements in general.
    SUMMARY OF THE INVENTION
    According to the invention, a better bracket is provided for supporting a duct system as part of a fire-resistant suspension structure anchorable to a ceiling, as defined in one of the relevant accompanying claims. The invention further provides a fire-resistant suspension structure anchorable to a ceiling, which comprises the improved bracket according to the invention.
    The invention provides a bracket for supporting a gutter system as part of a fire-resistant suspension system anchorable on at least one anchor point on a ceiling, the bracket being provided with means for mounting to a wall at one end or a support suspended from the ceiling and at the other end with means for attaching to a rod, characterized in that the means for attaching to the rod comprises a sleeve to surround the rod, and a bolt screwed through a hole in the wall of the sleeve to engage on the rod, whereby the location of the bracket relative to the rod is recorded.
    We have found that, with the bracket according to the present invention, the position of the end of the bracket can be easily fixed relative to the rod by screwing and tightening the single bolt through the hole in the sleeve against the rod. This brings the advantage that only one bolt must be screwed in for fixing and securing the position of the end of the bracket relative to the rod. Another advantage is that the rod does not have to be threaded at the point for fixing the bracket, which means that the rod must have thread over its entire length, but the rod can now only contain threads where this is necessary for the connection to the anchor point against the ceiling. It brings the further advantage that this fastening means of the bracket on the rod is suitable for rods of different diameters, as long as the rod fits into the sleeve of the bracket. There is no need to provide the nuts and lock washers corresponding to the diameter of each rod. A further advantage is that, in the case that the suspension system comprises more than one bracket, the rod can be provided as a single rod, and does not have to be provided with sections which then have to be assembled on site. The need to provide connection sleeves that correspond to the rod diameter is therefore also obsolete. The rod can also be brought into position after all pipes and cables have been provided. And if additional cables are to be installed after the initial assembly has been completed, the rod can be easily removed so that the extra cables can be pulled into position over long distances, thereby avoiding the need to weave the cables behind each of the rods each time .
    The invention further provides a fire-resistant suspension assembly, system or structure, anchorable at at least one anchor point on a ceiling, and which comprises the improved bracket according to the invention. The suspension system benefits from the advantages that the improved bracket entails as described above, in particular the simplicity and faster on-site mounting option, especially when the suspension system comprises more than one bracket.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Figure 1 shows a side view of a conventional standard suspension system according to DIN 4102-12.
    Figure 2 shows a side view of an improved bracket according to the present invention.
    Figure 3 shows a perspective view of a sleeve for attachment to the end of the bracket of the present invention.
    Figure 4 shows a perspective up view of a detail of a preferred fire-resistant suspension system according to the present invention, wherein the bracket is attached to a vertical support by only one bolt.
    Figure 5 shows an upward perspective view of the assembly of Figure 4 from a different angle.
    Figure 6 shows a perspective view of an L-shaped support according to a preferred embodiment of the present invention.
    Figure 7 provides a perspective upward view of the L-shaped support of Figure 6 anchored with its second arm to a ceiling with two anchoring points, and the rod for securing (not shown) the end of the bracket attached to the second arm of the L-shaped support.
    Figure 8 shows a perspective view of the detail of a connection of the rod to the second arm of the L-shaped support of Figure 7 using a sliding nut.
    Figure 9 shows a perspective view of the complete assembly of a preferred suspension system according to the invention which comprises three brackets each supporting a cable duct.
    DETAILED DESCRIPTION
    In a preferred embodiment of the suspension system of the present invention, the rod is a threaded rod. This brings a first advantage that the suspension system comprising a bracket according to the present invention could be certified as a standard suspension system according to DIN 4102-12, and therefore installed with any type of cable that is itself certified for integrity maintenance. A threaded rod brings a further and second advantage in that the position of the bolt, with respect to the rod and during interaction with the rod, can be fixed more firmly for the same torque, because the contact surface is smaller in comparison with a wireless rod. For the same clamping torque on the bolt, this creates a higher contact pressure on that contact surface, and thus a lower risk that the bolt would move along the surface of the rod.
    In one embodiment of the present invention, the bolt has a hexagonal head. This brings the advantage that the bolt fixing tools are the same as those used for installing and mounting the suspension system.
    In one embodiment of the present invention, the sleeve has a cylindrical shape at the end of the bracket. Cylindrical sleeves are easier to shape than other shapes. The cylindrical shape also makes it more convenient for attaching around a cylindrical rod, such as a threaded rod, and pressing the rod with the bolt through the hole in the sleeve against the wall of the sleeve opposite the hole.
    In another embodiment of the present invention, the hole in the sleeve extends radially through the wall of the sleeve. This provides the most convenient and safe way to secure the sleeve with a bolt through the hole in the sleeve on a cylindrical rod, such as a threaded rod.
    In another embodiment of the present invention, the bolt is a self-tapping bolt. This offers the advantage that the hole in the sleeve does not have to be provided with a pre-drawn thread, but that the thread is pulled during the final assembly, when the bolt is inserted, screwed and tightened.
    In yet another embodiment, the bolt has a point on the end. This brings the advantage that the contact surface between the bolt and the rod is even smaller and therefore brings a higher contact pressure to that surface for the same clamping force.
    In one embodiment of the present invention, the sleeve is welded or screwed to the bracket.
    The bracket according to the invention is preferably suitable for forming a part of a fire-resistant suspension system for supporting a gutter system, such as an electric cable gutter system. The invention therefore also provides a fire-resistant suspension system that can be anchored at at least one anchor point on a ceiling, and which comprises at least one bracket according to the present invention.
    In an embodiment of the present invention, the fire-resistant suspension system further comprises a rod hanging from the ceiling and wherein the bolt screwed through the wall of the sleeve of the bracket engages the rod and is tightened with a torque of at least 3 Nm, with more preferably at least 5 Nm, even more preferably at least 6 or even 7 Nm, and even more preferably at least 8 and even 9 Nm and typically about 10 Nm. Applicants prefer to apply a torque of at most 25 Nm, preferably at most 20 Nm, more preferably at most 15 Nm, even more preferably at most 13 or even 12 Nm, and even more preferably at most 11 Nm. Applicants have found that such torque provides sufficient clamping force from the top, from the bracket to the rod such that the attachment point does not slide under the severe conditions of a tunnel fire, and the suspension system passes the tests prescribed in DIN 4102-12.
    In another embodiment of the present invention, the bolt screwed through the wall of the sleeve sleeve has a diameter of at least 4 mm, preferably at least 5 mm, more preferably at least 6 mm, and optionally at most 12 mm, preferably at most 11 mm, more preferably at most 10 mm or 9 mm, and even more preferably at most 8 mm and most preferably at most 7 mm. In a preferred embodiment, the bolt has a diameter of 6 mm and is tightened with a torque of 8 to 10 Nm.
    In a preferred embodiment of the present invention, the rod of the fire-resistant suspension system is a threaded rod. This brings a first advantage that the system can be certified as a standard suspension system according to DIN 4102-12, and thus can be installed with any type of cable that is itself certified for integrity preservation. It brings a further and second advantage that the position of the bolt, with respect to the rod and upon interaction with the rod, can be fixed more firmly for the same torque, because the contact surface is smaller and therefore gives a higher pressure on that surface for the same tensioning force. , which causes a greater elastic deformation of the contact surfaces and therefore a tighter attachment.
    In an embodiment of the present invention, the fire-resistant suspension system further comprises a vertical support suspended from the ceiling, the bracket being attached to the vertical support, optionally by at least one bolt, further optionally by two bolts and preferably only by one bolt, or optionally formed by at least one preformed hook formed as an integral part at the end of the bracket, the hook being adapted for and engaging in at least one opening provided in the vertical support suspended from the ceiling.
    The bracket of the present invention can preferably be provided with a base plate which is suitable for anchoring to a wall with at least one anchor point, optionally with two anchor points, and which is simultaneously suitable for mounting on the vertical support suspended from a ceiling with at least one bolt, optionally with two bolts and preferably with only one bolt.
    In an embodiment of the present invention, the fire-resistant suspension system further comprises an L-shaped support whose first arm acts as a vertical support for one end of the bracket and the second arm is suitable for anchoring to a ceiling at at least one anchoring point, preferably at two anchor points. Most suitably, the two arms are coupled together simply by welding, but another suitable way can be devised by the skilled person for connecting the two arms and creating the L-shaped support according to the present invention. The first arm is preferably provided with holes at regular distances that conveniently correspond to the distance between the holes in the base plate of the bracket, such that the bracket can be screwed to the first arm by means of one or more than one bolt, if desirable. In another embodiment, the second arm is provided with at least one, preferably at least two holes through which the second arm can be anchored to a ceiling. This design allows anchoring of a suspension system, including the provision for securing the end of the bracket to a ceiling with fewer than three anchor points, optionally with only one anchor point, but preferably with two anchor points. This brings the advantage that fewer than three holes have to be drilled in the ceiling, and fewer than three fire-resistant plugs are sufficient for anchoring the support system to a ceiling. The lower number of holes to be drilled means a considerable time saving when installing the support system in the tunnel. The lower number of fire-resistant plugs required for installation is a significant cost saving.
    More preferably, the second arm is provided with a series of more than two holes at regular distances from each other, even more preferably with oval holes for anchoring the L-shaped support to a ceiling. This brings the advantage that a lower accuracy is required of the relative locations of the holes drilled in the ceiling of the tunnel for anchoring the support system. This means fewer repetitions and / or re-adaptation during the hearing procedure for the anchoring.
    In a preferred embodiment of the present invention, the suspension system comprises a rod, which is preferably a threaded rod, and the rod is attached to the second arm of the L-shaped support. This brings the advantage that the need for a separate anchorage point for the rod is eliminated. This saves one anchoring point for each suspension system, and means a time saving and a cost saving as already explained above.
    In an embodiment of the suspension system according to the present invention, the attachment of the rod, which is preferably a threaded rod, to the second arm is movably longitudinally attached to the second arm. This is preferably achieved by providing the second arm with a profile that is open in the direction of the rod, which opening is provided with inwardly directed restraining edges, and by suitably providing the rod with an element that can be retained by the edges of the profile of the second arm and which is movable along the length of the second arm, the element preferably being a slidable nut suitable for sliding within the profile of the second arm. This feature brings the advantage that the support system according to the present invention is adaptable to brackets of different lengths, and therefore the same support system can be used with different brackets.
    In a preferred embodiment of the suspension system according to the present invention, the attachment of the rod to the second arm is provided with means for determining the location of this attachment in the longitudinal direction of the second arm. This brings the advantage that the rod can be secured in a well-defined position along the second arm, which provides a more robust support system. A second advantage is that, if and when desired, the location-fixing means can be undone and the rod can be easily disconnected from the rest of the support system on one side. This location-fixing means is preferably provided by a locking nut screwed on one end of the rod with threaded thereon and more preferably by a fastening element which engages the surface of the second arm and is pressed against the surface by the locking nut , more preferably with a locking ring that is provided between the lock nut and the fixing element.
    In an embodiment of the suspension system according to the present invention, the second arm has a profile with an opening in the direction of the rod provided with inwardly directed restraining edges and in which the means for determining the location of the attachment in the longitudinal direction of the second arm have edges that engage around the walls of the open profile of the arm adapted to stop further opening of the opening in the profile at the place of attachment of the rod.
    Preferred embodiments of the present invention are now further illustrated with reference to a detailed description and the figures provided in the section of the drawings.
    Figure 2 shows a bracket 2 according to the present invention at whose end a socket element 3 is welded or screwed, in the wall of the socket element 3 is a hole through which a bolt 4 is screwed. At the foot end of the bracket 2 is a base plate 14 in which the necessary hole or holes are provided for anchoring the bracket to a wall or for attaching the bracket to a vertically suspended support of a suspension system.
    Figure 3 shows the detail of the sleeve element 3 with the bolt 4. The sleeve itself is firmly sealed by a weld.
    Figure 4 shows the base plate of the bracket 2, which is screwed against a vertical support by means of one bolt 5, one nut 7 and one retaining ring 6.
    Figure 5 shows the entire bracket 2 with at the tip its sleeve element 3 and the bolt 4 which engages through the wall of the sleeve on the rod 9. At the foot end of the bracket, base plate 14 is screwed with a single bolt 5 on the vertical arm of support 1.
    Figure 6 shows an L-shaped support 1 suitable for a preferred embodiment of the present invention. The two arms are provided with a series of holes. The holes in the second arm of the L-shaped support, intended to be anchored to the ceiling, are preferably oval holes. The holes in the first arm, intended to support the base plate of the bracket, are preferably not elongated, but square or round.
    Figure 7 shows an L-shaped support 1 with its second arm anchored to the ceiling by means of two screw means, consisting of nuts 12 with locking rings 11 screwed onto the threaded bolts of the fire-resistant plugs fixed in the ceiling. The second arm has a profile that is open downwards and that has inwardly directed restraints. The nuts 12 and locking rings 11 push fasteners 8 against the surface of the second arm, and the fasteners 8 have edges that engage around the walls of the open profile of the arm and retain the profile at the anchor point of further opening.
    Figure 8 shows in an embodiment of the present invention how the rod 9, which is preferably a threaded rod, can be slidably mounted in the longitudinal direction to the second arm of the L-shaped support. The rod is provided with a sliding nut 10 adapted to be retained by the inwardly directed retaining edges of the profile of the second arm. The position of the rod 9 with respect to the second arm can be fixed with clamping nut 12 and locking ring 11 which press a fastening element 8 against the surface of the second arm, and the fastening element 8 has edges which engage around the walls of the open profile of the second arm and which prevent the profile from opening further at the attachment point of the rod 9.
    Figure 9 shows the complete assembly of a preferred suspension system according to the invention, which comprises three brackets 2, each supporting a cable duct 13. Brackets 2 are screwed at their foot end to the first arm of the L-shaped support 1 and have on their end socket elements 3 with the bolts 4 for attachment to the rod 9, preferably a threaded rod. The rod 9 is attached to the second arm of L-shaped support 1 and the attachment comprises a securing element 8 with engaging edges for retaining the shape of the profile of the second arm and preventing its further opening. The second arm of the L-shaped support 1 is anchored to a ceiling by nut 12 and locking ring 11 over a bolt mounted in a fire-resistant plug that protrudes into a hole drilled into the ceiling, the nut 12 and locking ring 11 retaining a second mounting element 8 for providing a restraining function similar to the provided mounting element 8, wherein rod 9 is attached to the second arm of the L-shaped support 1.
    Now that the invention has been fully described, it will be appreciated by those skilled in the art that the invention can be practiced within a wide range of parameters within the claims, without departing from the spirit and scope of the invention. As understood by those skilled in the art, the invention as a whole, as defined by the claims, encompasses other preferred embodiments not specifically listed herein.
    权利要求:
    Claims (15)
    [1]
    A bracket (2) for supporting a gutter system (13) as part of a fire-resistant suspension system anchorable on at least one anchor point on a ceiling, the bracket (2) being provided with means (14) for attachment at one end on a wall or a support suspended from the ceiling and at the other end with means (3) for fixing to a rod (9), characterized in that the means (3) for fixing to the rod comprise a sleeve to surround the rod and a bolt (4) screwed through a hole in the wall of the sleeve to engage the rod (9), thereby determining the location of the bracket (2) relative to the rod (9).
    [2]
    The bracket according to claim 1, characterized in that the sleeve has a cylindrical shape.
    [3]
    The bracket according to claim 1 or 2, characterized in that the hole extends radially through the wall of the sleeve.
    [4]
    The bracket according to any of the preceding claims, characterized in that the bolt (4) is a self-tapping bolt.
    [5]
    The bracket according to any of the preceding claims, characterized in that the sleeve is welded or screwed to the bracket (2).
    [6]
    The bracket according to any of the preceding claims, further comprising a base plate (14) which is suitable for being anchored to a wall with at least one anchor point, preferably with at least two anchor points and which is at the same time also suitable for mounting on a vertical support, suspended from a ceiling, with at least one bolt (5), optionally with two bolts, and preferably with only one bolt.
    [7]
    A fire-resistant suspension system anchorable to at least one anchor point on a ceiling, the suspension system comprising at least one bracket (2) according to any one of the preceding claims.
    [8]
    The fire-resistant suspension system according to claim 7, further comprising a rod (9) hanging from the ceiling and wherein the bolt (4) screwed through the wall of the sleeve of the bracket (2) engages on the rod (9) and is tightened with a torque of at least 3 Nm, typically about 10 Nm.
    [9]
    The fire-resistant suspension system according to claim 8, wherein the rod (9) is a threaded rod.
    [10]
    The fire-resistant suspension system according to any of claims 7 to 9, further comprising a vertical support hanging from the ceiling and wherein the bracket (2) is attached to the vertical support.
    [11]
    The fire-resistant suspension system according to any of claims 7 to 10, further comprising an L-shaped support (1) of which a first arm acts as a vertical support for one end of the bracket (2) and the second arm is suitable for anchoring on a ceiling on at least one anchor point.
    [12]
    The fire-resistant suspension system according to claim 11, comprising a rod (9) wherein the rod (9) is attached to the second arm of the L-shaped support (1).
    [13]
    The fire-resistant suspension system according to claim 12, wherein the attachment of the rod (9) to the second arm is slidably attached to the second arm in the longitudinal direction.
    [14]
    The fire-resistant suspension system according to claim 13, wherein the attachment of the rod (9) to the second arm is provided with means for determining the location of the attachment in the longitudinal direction of the second arm.
    [15]
    The fire-resistant suspension system according to claim 14, wherein the second arm has a profile with an opening in the direction of the rod t (9) provided with inwardly directed restraining edges and wherein the means for determining the location of the attachment in the longitudinal direction of the second arm have edges that engage around the walls of the open profile of the arm adapted to stop further opening of the opening in the profile, at the place of attachment of the rod.
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    同族专利:
    公开号 | 公开日
    EP2400198B1|2013-07-31|
    EP2400198A1|2011-12-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2535427A|1946-04-02|1950-12-26|Kindorf Co|Conduit supporting frame|
    DE3317799C3|1983-05-17|1995-04-20|Promat Gmbh|Carrying device for electrical cables|
    US5039039A|1990-01-04|1991-08-13|Schaffer Michael D|Hanger bracket|
    DE19808991B4|1998-02-19|2005-03-24|Aestuver Bauplatten Gmbh|Carrying device for an installation channel|
    DE29907295U1|1999-04-24|1999-07-15|Bettermann Obo Gmbh & Co Kg|Cable support system|WO2016140970A1|2015-03-02|2016-09-09|Sunpower Corporation|Solar collector cable support tray and support system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP10159034|2010-04-01|
    EP20100159034|EP2400198B1|2010-04-01|2010-04-01|Improved fire resistant suspension system|
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