Railway bridge expansion device

Abstract

The utility model provides a railway bridge expansion device, which relates to the technical field of bridges and comprises a water stop expansion plate and at least one connecting seat component. The middle of the water stop telescopic plate is sunken to form a telescopic groove, each connecting base assembly comprises two connecting bases, and the two connecting bases of the connecting base assemblies are connected to the beam ends of two bridges to be connected correspondingly. The water stop telescopic plate is located between the two connecting bases of the connecting base assembly. Each connecting base is provided with a fixing protruding block, each fixing protruding block is further provided with a lock riveting rivet, and the lock riveting rivets enable the side edge of the water stop telescopic plate to be fixed to the fixing protruding blocks in a riveting mode. The water stop expansion plate has the advantages that the water stop expansion plate has a good expansion shape and has good fatigue performance under the cyclic tension and compression working condition; compared with a traditional polymer elastomer material, the water stop expansion plate made of the metal material has better durability and material stability, higher environmental adaptability and longer service life, and meanwhile, the water stop expansion plate made of the metal material further has the advantage of being convenient to replace.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge technical field, concretely is a railway bridge expansion device. BACKGROUND

[0002] Bridge expansion device is the important connecting component between railway bridge beam ends, plays an important role to bridge end expansion and waterproof performance, and the waterproof performance will directly influence the durability of bridge.

[0003] At present, the domestic commonly used railway bridge waterproof device has rubber band type waterproof device and elastomer waterproof device. Rubber band type waterproof device mostly consists of profiled steel (weathering steel profiled material or aluminum alloy section bar), rubber sealing band, rubber locking strip and anchoring steel bar. Rubber sealing band is embedded in the groove of profiled steel to realize the waterproof performance of the device, and the rubber sealing band is made of ethylene propylene diene rubber or neoprene, which can realize the expansion function. Elastomer waterproof device can adapt to the expansion and contraction of the beam body by its own deformation.

[0004] But the present railway bridge waterproof device has some deficiencies:

[0005] 1. Poor durability of rubber sealing band

[0006] The rubber sealing band is an aging component, and the rubber band is exposed to direct sunlight, ozone corrosion, high temperature and humid environment for a long time, which will gradually lose elasticity, resulting in insufficient clamping force with the profiled steel, and then falling off and losing waterproof performance. The damage or falling off of the rubber sealing band will cause the waterproof device to lose waterproof performance, resulting in water leakage along the beam end surface to the beam bottom, causing corrosion to the beam body and support facilities, damaging the safety and stability of the bridge and affecting the service life of the bridge.

[0007] 2. Complicated construction process

[0008] The elastomer expansion joint needs to be polished at the beam end, water content measured, dried, installed bottom lining, sprayed with primer, mixed and prepared, stirred, poured, and sprayed with surface coating during construction. Moreover, the installation environment is quite harsh, and it is strictly prohibited to install in negative temperature, above 5 grade wind, rainy and snowy weather and other environments.

[0009] 3. Difficult to check and replace

[0010] The upper part of the ballast track bridge waterproof device has a ballast cover plate and ballast, so it is very difficult to check and replace.

[0011] The quick replacement type waterproof device is located on the bridge in the operation process, which theoretically solves the replacement of the waterproof strip without removing the ballast, but a large amount of manpower, material resources and time are needed to investigate the leakage of the bridge, and some places with slight leakage are not easy to be found, which is easy to cause missed detection. The waterproof device is in the middle of the beam joint and is not easy to observe, and it is not easy to investigate in the early stage of leakage, and many waterproof devices are replaced after leakage, and if it is not found in time, the phenomenon of corrosion of the beam body and the support will also occur.

[0012] The elastomer expansion joint will crack locally after being used for a certain period of time, and currently there is only a local repair scheme, without a replacement scheme. Practical new type content

[0013] Therefore, the utility model provides a railway bridge expansion device, including water stop expansion board and at least one group of connecting seat assembly;

[0014] The middle part of the water stop expansion board is recessed to form an expansion groove, and the two sides of the water stop expansion board are respectively provided with a connecting wing, and a connecting groove is arranged at each connecting wing;

[0015] Each connecting seat assembly comprises two connecting seats, and the two connecting seats of the connecting seat assembly are respectively connected to the beam ends of the two bridges to be connected; the water stop expansion board is located between the two connecting seats of the connecting seat assembly;

[0016] A fixing protrusion is arranged on each connecting seat, and the fixing protrusion is embedded in the connecting groove on the water stop expansion board, so that the two sides of the water stop expansion board are respectively supported on the two connecting seats;

[0017] A locking rivet is further arranged on the fixing protrusion, and the locking rivet rivets the side edge of the water stop expansion board on the fixing protrusion.

[0018] Further, a filling groove is further arranged on each connecting seat, the fixing protrusion is the side part of the filling groove, and the rivet cap of the locking rivet is located in the filling groove.

[0019] Further, the filling groove is further filled with a filling material.

[0020] Further, the filling material is a two-component polyurethane material, and the water stop expansion board is made of stainless steel.

[0021] Further, the water stop expansion board is a V-shaped or U-shaped bent plate structure.

[0022] Further, each end of the water stop expansion board is respectively provided with a raised head part, and the height of the highest part of the raised head part is at least 90mm higher than that of the connecting wing of the water stop expansion board.

[0023] Further, a weight reduction cavity is arranged in the connecting seat, and the weight reduction cavity is parallel to the filling groove.

[0024] Further, the connecting seat is fixed to the beam end of the bridge by the anchor bar.

[0025] Further, one end of the anchor bar is embedded in the beam end of the bridge, and the other end of the anchor bar is a connecting end, the connecting end is provided with a thread and a fastening nut, the connecting seat is provided with a fixing groove, a special nut is limited in the fixing groove, the connecting end of the anchor bar is connected in the special nut, and the fastening nut is pressed on both sides of the fixing groove, so that the connecting end of the anchor bar is connected on the connecting seat.

[0026] Further, the fixing groove is a dovetail groove structure, the special nut is a tapered nut, a flat washer is sleeved on the connecting end of the anchor bar, and the flat washer is located between the fastening nut and the connecting seat.

[0027] The beneficial effects of the railway bridge expansion device are as follows: the expansion device comprises a water stop expansion plate and at least one connecting seat assembly; the water stop expansion plate is made of metal material, the middle part is folded to form

[0028] The expansion groove can utilize the metal ductility of the water stop expansion plate to have good expansion shape and good fatigue performance under cyclic tension and compression working conditions. Moreover, the water stop expansion plate made of metal material has better durability and material stability than the traditional high polymer elastomer material, has stronger environmental adaptability, has longer service life, and the water stop expansion plate made of metal material also has the advantage of being convenient to replace.

[0029] The connecting seat assembly comprises two connecting seats, one side of the connecting seat is connected with the bridge beam body through an anchor bar embedded part, and one side of the connecting seat is connected with the water stop expansion plate, so that the water stop expansion plate is connected firmly.

[0030] The water stop expansion plate is provided with a connecting wing on each side, the connecting wing is connected with the connecting seat through a lock rivet, the lock rivet can adopt a self-punching riveting process, the connection strength is higher than that of a pull riveting process, the sealing performance of the connection is better, the joint fatigue performance is stronger, and the expansion device does not need to be pre-drilled, and the construction process is more convenient.

[0031] After the connecting wing of the water stop expansion plate is riveted with the connecting seat, the riveting part is also filled with filling material to seal the connection part, so that the sealing and water stopping performance of the connection part of the expansion device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 is a schematic view of the overall structure of the railway bridge expansion device according to an embodiment of the present application.

[0033] Fig. 2 is a schematic view of the connection structure of the water stop expansion plate and the connecting seat 2 of the railway bridge expansion device according to an embodiment of the present application.

[0034] Fig. 3 is a riveting structure schematic view of the water stop expansion joint of the railway bridge expansion device.

[0035] Fig. 4 is a structure schematic view of the head lifting part 11 of the water stop expansion joint of the railway bridge expansion device.

[0036] In the above figure: 1 - water stop expansion joint, 11 - head lifting part, 2 - connecting seat, 21 - fixed protrusion, 22 - weight reduction cavity, 23 - fixed groove, 3 - anchor bar, 4 - special-shaped nut, 5 - fastening nut, 6 - flat washer, 7 - locking rivet, 8 - filling material. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model embodiments will be further described below with reference to the drawings.

[0038] Please refer to Figs. 1 to 4 The utility model relates to a railway bridge expansion device, which comprises a water stop expansion joint 1 and at least one connecting seat assembly. This embodiment takes one connecting seat assembly as an example to introduce the expansion device.

[0039] The water stop expansion joint 1 is made of metal, and the middle part of the water stop expansion joint 1 is bent to form a recessed expansion slot. In this embodiment, the water stop expansion joint 1 is a V-shaped or U-shaped bent plate structure, which can make the water stop expansion joint 1 have good expansion property (i.e. the width of the water stop expansion joint 1 can be elastically adjusted within a certain range).

[0040] The water stop expansion joint 1 is provided with a connecting wing on each side, and each connecting wing is provided with a connecting groove;

[0041] Each connecting seat assembly comprises two connecting seats 2, and the connecting seats 2 are made of aluminum alloy profiles. The two connecting seats 2 of the connecting seat assembly are fixedly connected to the beam ends of the two bridges to be connected. The water stop expansion joint 1 is located between the two connecting seats 2 of the connecting seat assembly.

[0042] Each connecting seat 2 is provided with a fixed protrusion 21, and the top of the fixed protrusion 21 is an arc surface. The fixed protrusion 21 is embedded in the connecting groove on the water stop expansion joint 1, so that the two sides of the water stop expansion joint 1 are supported on the two connecting seats 2 respectively;

[0043] The fixed protrusion 21 is further provided with a locking rivet 7, which rivets the side of the water-stop expansion plate 1 to the fixed protrusion 21, so that the two ends of the water-stop expansion plate 1 are fixed to the two connecting seats 2 respectively. The locking rivet 7 is made by self-punching riveting process. The two connecting seats 2 are fixed to the beam ends of the two bridges to be connected by anchor bars 3, so that the water-stop expansion plate 1 can be connected between the beam ends of the two bridges to be connected, thereby achieving the purpose of expansion connection of the beam ends of the bridges.

[0044] In the above structure, the water-stop expansion plate is made of metal material, and the middle part is folded to form an expansion groove. The expansion groove has good expansion shape and better fatigue performance under cyclic tension and compression conditions due to the metal ductility of the water-stop expansion plate. In addition, the water-stop expansion plate made of metal material has better durability and material stability, stronger environmental adaptability, longer product service life, and the advantage of being easy to replace. The connecting seat assembly includes two connecting seats, one side of the connecting seat is connected to the bridge beam body through an anchor bar embedded part, and the other side of the connecting seat is connected to the water-stop expansion plate, so as to ensure firm connection of the water-stop expansion plate; the connecting wing of the water-stop expansion plate is connected to the connecting seat through a locking rivet, and the locking rivet is made by self-punching riveting process. Compared with the pull riveting process, the locking rivet has higher connection strength, better sealing performance at the connection, stronger joint fatigue performance, and no need for pre-punching holes, so that the construction process is more convenient.

[0045] In the preferred embodiment, each connecting seat 2 is further provided with a filling groove, the fixed protrusion 21 is the side of the filling groove, and the rivet cap of the locking rivet 7 is located in the filling groove. The filling groove is further filled with a filling material 8. The filling material 8 is a two-component polyurethane material, and the water-stop expansion plate 1 is made of stainless steel. The filling material 8 can seal the filling groove, so as to enhance the sealing and water-stopping performance of the expansion device at the connection.

[0046] In the preferred embodiment, the water-stop expansion plate 1 is further provided with a raised head part 11 at each end, and the height of the highest part of the raised head part 11 is at least 90 mm higher than the connecting wing of the water-stop expansion plate 1. The raised head part 11 can make the accumulated water in the water-stop expansion plate 1 flow out from both ends, flow to the flanges of the beam body and under the bridge, and wash the beam body and pier, thereby damaging the bridge support and other auxiliary facilities and affecting the service life of the bridge.

[0047] In the preferred embodiment, the connecting seat 2 is provided with a weight-reducing cavity 22, which is parallel to the filling groove. The weight-reducing cavity 22 can reduce the weight of the connecting seat 2 and save materials.

[0048] In the preferred embodiment, one end of the anchor bar 3 is embedded in the beam end of the bridge, and the other end of the anchor bar 3 is a connecting end, which is provided with a thread and a fastening nut 5, the connecting seat 2 is provided with a fixing groove 23, the fixing groove 23 is limited by a special-shaped nut 4, the special-shaped structure of the special-shaped nut 4 can limit the rotation of the special-shaped nut 4 in the fixing groove 23, the connecting end of the anchor bar 3 is connected to the special-shaped nut 4, and the fastening nut 5 is pressed on both sides of the fixing groove 23, so as to connect the connecting end of the anchor bar 3 to the connecting seat 2.

[0049] In the preferred embodiment, the fixing groove 23 is a dovetail groove structure, the special-shaped nut 4 is a conical nut, the connecting end of the anchor bar 3 is sleeved with a flat washer 6, and the flat washer 6 is located between the fastening nut 5 and the connecting seat 2.

[0050] In this paper, the front, back, up, down and other orientation words are defined by the position of the parts in the drawing and the position of the parts relative to each other in the drawing, only for the purpose of expressing the technical scheme clearly and conveniently. It should be understood that the use of the orientation words should not limit the scope of the application.

[0051] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other.

[0052] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A railway bridge expansion joint, characterised in that: The utility model relates to a waterstop expansion joint (1) and at least one set of connecting seat assembly. The waterstop expansion joint (1) is provided with a connecting wing on each side, and each connecting wing is provided with a connecting groove. Each connecting seat assembly comprises two connecting seats (2), and the two connecting seats (2) of the connecting seat assembly are connected to the beam ends of two bridges to be connected. Each connecting seat (2) is provided with a fixing protrusion (21), and the fixing protrusion (21) is embedded in the connecting groove on the waterstop expansion joint, so that the waterstop expansion joint (1) is supported on the two connecting seats (2) on the two sides, respectively. The fixing protrusion (21) is further provided with a locking rivet (7), and the locking rivet (7) rivets the side edge of the waterstop expansion joint (1) to the fixing protrusion (21).

2. A railway bridge expansion joint according to claim 1, characterised in that: Each connecting seat (2) is further provided with a filling groove, and the fixing protrusion (21) is a side part of the filling groove.

3. A railway bridge expansion joint according to claim 2, wherein: The filling groove is further filled with a filling material (8).

4. A railway bridge expansion joint according to claim 3 wherein: The filling material (8) is a two-component polyurethane material, and the waterstop expansion joint (1) is made of stainless steel.

5. A railway bridge expansion joint as defined in claim 1, wherein: The waterstop expansion joint (1) is a V-shaped or U-shaped bent plate structure.

6. A railway bridge expansion joint as defined in claim 1, wherein: Each end of the waterstop expansion joint (1) is provided with a raised head (11), and the height of the highest part of the raised head (11) is at least 90 mm higher than the connecting wing of the waterstop expansion joint (1).

7. A railway bridge expansion joint as defined in claim 2, wherein: The connecting seat (2) is provided with a weight-reducing cavity (22) parallel to the filling groove.

8. A railway bridge expansion joint as defined in claim 1, wherein: The connecting seat (2) is fixed to the beam end of the bridge through an anchor bar (3).

9. A railway bridge expansion joint according to claim 8, wherein: One end of the anchor bar (3) is embedded in the beam end of the bridge, and the other end of the anchor bar (3) is a connecting end provided with a thread and a fastening nut (5).

10. A railway bridge expansion joint according to claim 9, wherein: The connecting seat (2) is provided with a fixing groove (23), and the fixing groove (23) is limited by a special-shaped nut (4), the connecting end of the anchor bar (3) is connected in the special-shaped nut (4), and the fastening nut (5) is pressed on both sides of the fixing groove (23), so that the connecting end of the anchor bar (3) is connected to the connecting seat (2). The fixing groove (23) is a dovetail groove structure, the special-shaped nut (4) is a conical nut, the connecting end of the anchor bar (3) is provided with a flat washer (6), and the flat washer (6) is located between the fastening nut (5) and the connecting seat (2).

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