Comb tooth type telescopic device

Abstract

The invention discloses a comb tooth type telescopic device which is arranged at a gap between two adjacent beam bodies of a bridge, the comb tooth type telescopic device comprises a main body system and a supporting displacement system, the main body system comprises an embedded box body, a cover plate and a rack beam, and the supporting displacement system comprises a first elastic supporting element and a second elastic supporting element. The first elastic supporting element is arranged at the sliding end of the rack beam, the first elastic supporting element comprises a first pressure-bearing support and a first pressing support, and the first pressure-bearing support and the first pressing support are arranged in a staggered mode in the vertical direction; the second elastic supporting element is arranged at the fixed end of the rack beam and comprises a second pressure bearing support and a second pressing support. The comb tooth type telescopic device adapts to bridge changes, meanwhile, the assembly type design is adopted, the construction efficiency is improved, the replacement difficulty of quick-wear parts is lowered, the device maintenance cost is saved, the comb tooth type telescopic device adapts to bridges of various specifications, and the adaptability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge expansion joints, and in particular to a comb-tooth type expansion device. Background Art

[0002] Bridge expansion joints are a very important part of bridge structures. Their main function is to adjust the displacement and connection between the superstructure caused by vehicle loads and bridge construction materials. The bridge surface is affected by the ambient temperature, and the bridge deck will expand and contract with heat. The expansion joint can adapt to this temperature change, adjust the expansion and contraction of the bridge deck, and prevent the bridge from being subjected to excessive tension. At the same time, the bridge needs to withstand vehicles, people and other external loads. The expansion joint can disperse these loads to other parts of the bridge to prevent the bridge from being damaged due to excessive local stress.

[0003] Comb-tooth expansion joint is a type of bridge expansion joint. Comb-tooth expansion joint consists of a series of parallel arranged steel teeth. These steel teeth are alternately fixed and movable, allowing the bridge to expand and contract horizontally and vertically at the expansion joint to adapt to the expansion and contraction displacement of the bridge caused by temperature changes, vehicle loads, concrete shrinkage and other factors, while ensuring the driving comfort and structural safety of the bridge.

[0004] The comb-tooth expansion joint can adapt to a larger expansion amount and is suitable for bridges with different spans and different use conditions. As the size of the expansion joint decreases, the size of the rack beam also decreases. For small joints, the expansion joint structure is too complicated, the installation materials are more, the construction time is long, and the cost performance is poor. Summary of the invention

[0005] The purpose of the present invention is to provide a comb-tooth type telescopic device to solve the problems existing in the above-mentioned related technologies. While adapting to changes in bridges, it adopts an assembled design, improves construction efficiency, reduces the difficulty of replacing wearing parts, and saves device maintenance costs.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a comb-tooth type telescopic device, which is arranged at a gap between two adjacent beams of a bridge, and the comb-tooth type telescopic device comprises:

[0008] A main body system, the main body system comprises an embedded box, a cover plate and a rack beam, the embedded box is arranged on the top of the beam body, and the cover plate is detachably connected to the embedded box; one end of the rack beam is fixed in the space surrounded by the embedded box and the cover plate on one side of the gap, and the other end can be slidably extended into the space surrounded by the embedded box and the cover plate on the other side of the gap, the number of the rack beams is multiple groups, the multiple groups of rack beams are arranged in parallel, and the sliding directions of two adjacent rack beams are opposite to form a comb-tooth telescopic structure to adapt to the change of the gap;

[0009] A support displacement system, the support displacement system includes a first elastic support element and a second elastic support element, the first elastic support element is arranged at the sliding end of the rack beam, the first elastic support element includes a first pressure-bearing support and a first clamping support, the first pressure-bearing support is located at the bottom of the rack beam, the first clamping support is located at the top of the rack beam, and the first pressure-bearing support and the first clamping support are staggered in the vertical direction; the second elastic support element is arranged at the fixed end of the rack beam, the second elastic support element includes a second pressure-bearing support and a second clamping support, the second pressure-bearing support is located at the bottom of the rack beam, and the second clamping support is located at the top of the rack beam.

[0010] Preferably, the first pressure bearing seat is located on a side of the embedded box body close to the gap and abuts against the rack beam and the embedded box body, and the first clamping seat is located at the end of the sliding end of the rack beam and abuts against the rack beam and the cover plate.

[0011] Preferably, the first pressure-bearing support is connected to the embedded box body by means of an installation pin, the first clamping support is connected to the rack beam by means of an installation pin, and the first pressure-bearing support, the first clamping support, the embedded box body and the rack beam all have installation holes that are compatible with the installation pin.

[0012] Preferably, the second pressure bearing support is disposed between the fixed end of the rack beam and the embedded box and connected to the two, and the second clamping support is disposed on the top of the fixed end of the rack beam and connected to the rack beam.

[0013] Preferably, the support displacement system further comprises a rotating column, the second elastic support element is connected to the rack beam and the embedded box by means of the rotating column, and the rack beam can rotate around the rotating column;

[0014] The second elastic supporting element, the rack beam and the embedded box body all have a through hole adapted to the rotating column, an embedded nut is provided at the bottom of the embedded box body, one end of the rotating column passes through the second clamping support, the rack beam, the second pressure-bearing support and the embedded box body in sequence and is threadedly connected to the embedded nut, the end of the rotating column extending from the second clamping support is locked by a locking nut, and the cover plate has a groove capable of accommodating the locking nut.

[0015] Preferably, the support displacement system further comprises a rotating pin, the rotating pin is connected to the rack beam, the second pressing support and the second pressure bearing support both have a through hole adapted to the rotating pin, the rotating pin extends from the top and the bottom of the rack beam, and rotatably extends into the through holes of the second pressing support and the second pressure bearing support;

[0016] The cover plate and the embedded box body both have positioning pins, and the positioning pins extend into the through holes of the second clamping support and the second pressure-bearing support respectively, and there is a gap between the positioning pin and the rotating pin.

[0017] Preferably, the embedded box is provided with box ribs, and a plurality of groups of the box ribs are arranged in parallel, the sliding end of the rack beam can extend into the gap between adjacent box ribs, and the cover plate is bolted to the box ribs;

[0018] The embedded box is connected to the beam body by using multiple groups of anchoring elements; one end of the anchoring element is connected to the embedded box, and one end of the anchoring head of the anchoring element is embedded in the beam body.

[0019] Preferably, a limit block is provided at the bottom of the fixed end of the rack beam, and the limit block can abut against a side of the second pressure bearing support away from the gap to limit the extreme position of the rack beam;

[0020] Limiting pins are arranged on both sides of the fixed end of the rack beam to limit the distance between adjacent rack beams.

[0021] Preferably, a water retaining strip is provided at the bottom of the gap, and two adjacent beam bodies are provided with embedded mounting parts on one side close to the gap, and the water retaining strip is connected to the embedded mounting parts with bolts;

[0022] The water retaining strip is made of a trapezoidal sheet material, and two waists of the trapezoidal sheet material are bolted to the embedded mounting parts so that the bottom of the water retaining strip gradually tilts downward along the length direction of the gap.

[0023] Preferably, the rack beam is a stepped structure, and a curved transition surface is provided at the step of the rack beam;

[0024] A debris blocking plate is arranged on one side of the cover plate close to the gap, the debris blocking plate is detachably connected to the cover plate, and the debris blocking plate has a flexible shielding strip, which can shield the gap between the cover plate and the rack beam and abut against the rack beam.

[0025] Compared with the related art, the present invention has achieved the following technical effects:

[0026] The comb-tooth type telescopic device of the present invention has an embedded box body arranged on the top of the beam body, the embedded box body and the cover plate are detachably connected to form a space for the rack beam to be installed and slide, a plurality of groups of rack beams are arranged in parallel to construct a comb-tooth telescopic structure to adapt to the change of the gap, and the displacement and rotation of the comb-tooth telescopic structure caused by the change of the gap are all carried out in the space surrounded by the embedded box body and the cover plate, which avoids the problem of warping of the comb-tooth telescopic structure to the greatest extent and improves the traffic safety of the bridge; the main system of the present invention adopts a detachable structure, which greatly improves the construction efficiency, reduces the difficulty of replacing wearing parts, and is conducive to saving the maintenance cost of the device. The main system of the present invention utilizes the elastic deformation of the support displacement system to adapt to the change of the gap. A first elastic support element is arranged at the sliding end of the rack beam, a first pressure bearing is located between the rack beam and the embedded box, a first clamping bearing is located between the rack beam and the cover plate, a second elastic support element is arranged at the fixed end of the rack beam, a second pressure bearing is located between the rack beam and the embedded box, and a second clamping bearing is located between the rack beam and the cover plate. The first elastic support element and the second elastic support element are elastic and can adapt to the movement of the rack beam and the deflection in the vertical and horizontal directions when the gap changes. In the first elastic support element of the present invention, the first pressure bearing and the first clamping bearing are staggered in the vertical direction. The staggered arrangement is conducive to dispersing the force, reducing the stress concentration of the support displacement system, and enhancing the structural stability of the system. The comb-tooth type telescopic device of the present invention, while adapting to the changes of the bridge, adopts an assembled design, improves the construction efficiency, reduces the difficulty of replacing wearing parts, saves the maintenance cost of the device, adapts to bridges of various specifications, and improves the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is an axonometric schematic diagram of a comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0029] Figure 2It is a front view schematic diagram of a comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0030] Figure 3 A schematic top view of a comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0031] Figure 4 for Figure 3 Schematic diagram of the section along the AA direction;

[0032] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0033] Figure 6 It is a schematic structural diagram of a rotating pin of a comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0034] Figure 7 It is a schematic cross-sectional structure diagram of a first pressure-bearing support of a comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0035] Figure 8 It is a schematic cross-sectional structure diagram of a first pressing support of a comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0036] Fig. 9 It is a schematic cross-sectional structure diagram of the second pressure-bearing support of the comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0037] Fig.10 It is a schematic cross-sectional structure diagram of the second pressing support of the comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0038] Fig.11 It is a schematic structural diagram of a limit pin of a comb-tooth type telescopic device disclosed in an embodiment of the present invention;

[0039] Fig.12 It is a structural schematic diagram of a comb-tooth type telescopic device disclosed in Embodiment 3 of the present invention;

[0040] Fig.13 for Fig.12 Schematic diagram of the cross-section along CC direction.

[0041] In the figure: 1. beam body; 2. embedded box body; 3. cover plate; 4. rack beam; 5. first pressure bearing; 6. first clamping bearing; 7. second pressure bearing; 8. second clamping bearing; 9. mounting pin; 10. rotating column; 11. embedded nut; 12. embedded steel plate; 13. locking nut; 14. box body rib; 15. anchoring element; 16. limit block; 17. limit pin; 18. water retaining strip; 19. embedded mounting part; 20. debris retaining plate; 21. flexible shielding strip; 22. pad; 23. rotating pin; 24. positioning pin; 25. anti-slip groove. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The purpose of the present invention is to provide a comb-tooth type telescopic device to solve the problems existing in the above-mentioned related technologies. While adapting to changes in bridges, it adopts an assembled design, improves construction efficiency, reduces the difficulty of replacing wearing parts, and saves device maintenance costs.

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Embodiment 1

[0046] This embodiment provides a comb-tooth type telescopic device, please refer to Figure 1-Figure 13 , arranged at the gap between two adjacent beams 1 of the bridge, the comb-tooth type telescopic device includes a main body system and a support displacement system, the main body system includes an embedded box 2, a cover plate 3 and a rack beam 4, the embedded box 2 is arranged on the top of the beam 1, and the cover plate 3 is detachably connected to the embedded box 2; one end of the rack beam 4 is fixed in the space surrounded by the embedded box 2 and the cover plate 3 on one side of the gap, and the other end can be slidably extended into the space surrounded by the embedded box 2 and the cover plate 3 on the other side of the gap, the number of rack beams 4 is multiple groups, and the multiple groups of rack beams 4 are arranged in parallel, and the sliding directions of the two adjacent rack beams 4 are opposite to form a comb-tooth telescopic structure to adapt to the change of the gap; the support The displacement system includes a first elastic supporting element and a second elastic supporting element. The first elastic supporting element is arranged at the sliding end of the rack beam 4. The first elastic supporting element includes a first pressure-bearing support 5 and a first clamping support 6. The first pressure-bearing support 5 is located at the bottom of the rack beam 4, and the first clamping support 6 is located at the top of the rack beam 4, and the first pressure-bearing support 5 and the first clamping support 6 are staggered in the vertical direction; the second elastic supporting element is arranged at the fixed end of the rack beam 4, and the second elastic supporting element includes a second pressure-bearing support 7 and a second clamping support 8. The second pressure-bearing support 7 is located at the bottom of the rack beam 4, and the second clamping support 8 is located at the top of the rack beam 4.

[0047] In the comb-tooth type telescopic device of the present invention, the embedded box 2 is arranged on the top of the beam body 1, the embedded box 2 and the cover plate 3 are detachably connected and enclose a space for the rack beam 4 to be installed and slide, a plurality of groups of rack beams 4 are arranged in parallel and construct a comb-tooth telescopic structure to adapt to the change of the gap, and the displacement and rotation of the comb-tooth telescopic structure caused by the change of the gap are all carried out in the space enclosed by the embedded box 2 and the cover plate 3, which avoids the problem of warping of the comb-tooth telescopic structure to the greatest extent and improves the traffic safety of the bridge; the main system of the present invention adopts a detachable structure, which greatly improves the construction efficiency, reduces the difficulty of replacing wearing parts, and is conducive to saving the maintenance cost of the device. The main system of the present invention utilizes the elastic deformation of the support displacement system to adapt to the change of the gap. A first elastic support element is arranged at the sliding end of the rack beam 4, a first pressure bearing seat 5 is located between the rack beam 4 and the embedded box 2, a first clamping seat 6 is located between the rack beam 4 and the cover plate 3, a second elastic support element is arranged at the fixed end of the rack beam 4, a second pressure bearing seat 7 is located between the rack beam 4 and the embedded box 2, and a second clamping seat 8 is located between the rack beam 4 and the cover plate 3. The first elastic support element and the second elastic support element are elastic and can adapt to the movement of the rack beam 4 and the deflection in the vertical and horizontal directions when the gap changes. In the first elastic support element of the present invention, the first pressure bearing seat 5 and the first clamping seat 6 are staggered in the vertical direction. The staggered arrangement is conducive to dispersing the force, reducing the stress concentration of the support displacement system, and enhancing the structural stability of the system. The comb-tooth type telescopic device of the present invention, while adapting to the changes of the bridge, adopts an assembled design, improves the construction efficiency, reduces the difficulty of replacing wearing parts, saves the maintenance cost of the device, adapts to bridges of various specifications, and improves the adaptability of the device.

[0048] Specifically, the first pressure bearing 5 is located on the side of the embedded box 2 close to the gap, and is against the rack beam 4 and the embedded box 2. The first clamping bearing 6 is located at the end of the sliding end of the rack beam 4, and is against the rack beam 4 and the cover plate 3. The first pressure bearing 5 and the first clamping bearing 6 are staggered to allow the device to deform independently in different directions, so that the device can better adapt to the multi-directional displacement requirements of the bridge in vertical, lateral and torsional directions. On this basis, the present invention moves the first clamping bearing 6 to the end of the sliding end of the rack beam 4, so that the device can adapt to a larger vertical rotation angle, further improving the adaptability and safety of the device.

[0049] The first pressure bearing 5 is connected to the embedded box 2 by means of the mounting pin 9, and the first clamping bearing 6 is connected to the rack beam 4 by means of the mounting pin 9. The first pressure bearing 5, the first clamping bearing 6, the embedded box 2 and the rack beam 4 all have mounting holes adapted to the mounting pin 9. The first pressure bearing 5 and the first clamping bearing 6 are mounted and fixed by means of the mounting pin 9, which improves the positioning accuracy and installation convenience of the first pressure bearing 5 and the first clamping bearing 6. At the same time, the first pressure bearing 5 and the first clamping bearing 6 can be conveniently replaced when damaged, thereby improving the maintenance efficiency.

[0050] In this specific embodiment, the support displacement system also includes a rotating column 10. The second elastic support element is connected to the rack beam 4 and the embedded box 2 via the rotating column 10. The rack beam 4 can rotate around the rotating column 10, thereby further improving the adaptability of the device to horizontal changes in the bridge.

[0051] The rack beam 4 is rotatably connected to the rotating column 10, wherein the second elastic supporting element, the rack beam 4 and the embedded box 2 all have through holes adapted to the rotating column 10. In order to fix the rotating column 10, an embedded nut 11 is provided at the bottom of the embedded box 2. The embedded nut 11 can be fixed to the bottom of the embedded box 2 by welding, and the embedded nut 11 is embedded in the beam body 1. In order to prevent the embedded nut 11 from being blocked by materials during the pouring of the beam body 1, an embedded steel plate 12 can be provided at the bottom of the embedded nut 11; one end of the rotating column 10 passes through the second clamping support 8, the rack beam 4, the second pressure bearing support 7 and the embedded box 2 in sequence, and is threadedly connected to the embedded nut 11. The end of the rotating column 10 extending from the second clamping support 8 is locked with a locking nut 13. The structure is compact and easy to disassemble and assemble, providing convenient conditions for subsequent replacement and maintenance of parts. When the horizontal direction of the bridge changes, the comb-tooth telescopic structure of the main unit telescopes to adapt to the gap change, and the rack beam 4 can rotate relative to the rotating column 10 to adapt to the horizontal deflection of the bridge. This embodiment uses the rotating column 10 to provide a rotation axis for the rack beam 4 in the horizontal direction, which ensures the movement stability of the rack beam 4 and improves the adaptability of the device to the horizontal direction change of the bridge. The rotating column 10 is rotatably connected to the rack beam 4, which facilitates the disassembly, assembly and replacement of the rack beam 4 and the second elastic support element. It should also be noted that the bottom surface of the cover plate 3 has a groove that can accommodate the locking nut 13 to ensure the structural stability of the cover plate 3. In actual applications, sound-absorbing cotton can also be set in the cover plate 3 according to specific working conditions to reduce the noise generated when the vehicle passes and enhance the noise reduction effect of the device.

[0052] More specifically, a box rib 14 is provided in the embedded box 2 to enhance the stability and structural strength of the embedded box 2. Multiple groups of box ribs 14 are arranged in parallel, and the sliding end of the rack beam 4 can extend into the gap between adjacent box ribs 14. The gap between the box ribs 14 is reasonably set to prevent the box ribs 14 from affecting the deflection of the rack beam 4. In this specific embodiment, the spacing between the box ribs 14 is 200 mm. In practical applications, the gap between the box ribs 14 can be adjusted according to the specifications of the embedded box 2, the rack beam 4 and other components, and the telescopic deflection of the comb-tooth telescopic structure to meet different working conditions. The cover plate 3 is bolted to the box rib 14, and the connection is tight, which is convenient for disassembly and assembly. When disassembling and replacing the rack beam 4 and other components, the cover plate 3 can be removed first, which improves the maintenance convenience of the device. In practical applications, the embedded box 2, the box ribs 14 and the cover plate 3 can all be made of thick steel plates, so that the main system of the device has sufficient strength and enhanced bearing capacity. At the same time, the fixed end and the sliding end of the rack beam 4 are both located in the space surrounded by the embedded box 2 and the cover plate 3, which enhances the structural strength of the main system, avoids problems such as prying teeth, and ensures the safety of the device. In this specific embodiment, the thickness of the top plate, bottom plate and cover plate 3 of the embedded box 2 is 30 mm, which can be adjusted in practical applications to improve the flexibility and adaptability of the device.

[0053] In practical applications, the embedded box 2 is connected to the beam body 1 using multiple groups of anchoring elements 15, which ensures the structural strength of the embedded box 2 while ensuring the structural firmness of the connection between the embedded box 2 and the beam body 1. The type and distribution of the anchoring elements 15 can be adjusted according to the actual project and construction requirements. In this specific embodiment, one end of the anchoring element 15 is connected to the embedded box 2, and one end of the anchoring head of the anchoring element 15 is embedded in the beam body 1. The anchoring element 15 can be set at the connection between the bottom plate and the side plate of the embedded box 2 and the beam body 1 to enhance the structural strength of the connection between the embedded box 2 and the beam body 1. The arrangement of the anchoring element 15 can also be adjusted according to the actual working conditions. When setting the embedded nuts 11 and the embedded steel plates 12, interference with the anchoring elements 15 should be avoided. Reasonable setting of the anchoring elements 15 to avoid interference belongs to the usual means of those skilled in the art, which will not be repeated here.

[0054] In order to ensure the movement safety factor of the rack beam 4, a limit block 16 is provided at the bottom of the fixed end of the rack beam 4. The limit block 16 can abut against the side of the second pressure bearing support 7 away from the gap to limit the extreme position of the rack beam 4, prevent the fixed end of the rack beam 4 from slipping, and improve the safety factor of the device. The limit block 16 has a simple structure, occupies a small space, and has a low production cost, which is conducive to further improving the adaptability of the device.

[0055] The present invention sets multiple groups of rack beams 4. In this specific embodiment, the gap between the rack beams 4 is about 10 mm, ensuring that when a vehicle passes, the wheel load is supported by multiple rack beams 4 at the same time. Each rack beam 4 bears a small load, ensuring that the rack beam 4 can withstand various vehicle loads, with a strong bearing capacity, and can effectively prevent narrow bicycles and electric vehicles from getting stuck in the beam gap, ensuring driving safety. In order to ensure that the gaps between the rack beams 4 are uniform and that the multiple groups of rack beams 4 maintain a parallel motion state, both sides of the fixed end of the rack beam 4 are provided with limit pins 17 to limit the spacing between adjacent rack beams 4. In this specific embodiment, the limit pin 17 has a limit pin head, and the limit pin 17 is detachably connected to the rack beam 4, which is convenient for disassembly, assembly and replacement of the rack beam 4. One end of the limit pin of the limit pin 17 extends into the rack beam 4, and the limit pin head of the limit pin 17 has a larger diameter and is located outside the rack beam 4. The limit pins 17 of adjacent rack beams 4 can contact and play a limiting role, so that the gap between the rack beams 4 can be kept within a certain range. It should also be noted that the side of the limit pin head of the limit pin 17 away from the rack beam 4 has a conical transition surface to avoid affecting the deflection of the rack beam 4 and ensure the working reliability of the device.

[0056] In order to ensure the waterproofness of the comb-tooth type telescopic device, a water retaining strip 18 is provided at the bottom of the gap, and two adjacent beam bodies 1 are provided with embedded mounting parts 19 on one side close to the gap. The water retaining strip 18 is bolted to the embedded mounting parts 19, which facilitates the disassembly, assembly and replacement of the water retaining strip 18. In practical applications, the embedded mounting parts 19 and the bolt heads can be embedded in the water retaining strip 18, and after the water retaining strip 18 passes through the bolt rod, the nut is tightened to complete the installation. When replacing the water retaining strip 18, it is possible to replace it without destroying the beam body 1 and the embedded mounting parts 19, and the operation is convenient.

[0057] In this specific embodiment, the water retaining strip 18 can be made of rubber material. The water retaining strip 18 is made of trapezoidal sheet material, that is, the water retaining strip 18 is an isosceles trapezoidal rubber strip before installation. The two waists of the rubber strip are bolted to the embedded mounting parts 19, so that the bottom of the installed rubber strip is bent downward, and one end is high and the other end is low, so that the bottom of the water retaining strip 18 gradually tilts downward along the length direction of the gap, and the water flows away immediately after falling into the water retaining strip 18 to avoid water accumulation.

[0058] In practical applications, the rack beam 4 can be set to a stepped structure, and a curved transition surface is set at the step of the rack beam 4 to avoid damage to the tires of passing vehicles and improve the safety of the device. It should also be noted that in other specific embodiments that can be implemented by the present invention, anti-skid grooves 25 can be set on the rack beam 4, the top surface of the embedded box 2 and the cover plate 3 to increase the friction coefficient and ensure that the vehicle does not slip when passing. In practical applications, the specifications and distribution of the anti-skid grooves 25 can be adjusted according to the specifications of the device. For example, the depth of the anti-skid grooves 25 is 3mm, and the friction coefficient of the working surface of the comb-tooth type telescopic device is not less than 0.55 to ensure driving safety.

[0059] Furthermore, in order to reduce the amount of external debris entering the device, a debris retaining plate 20 is provided on the side of the cover plate 3 close to the gap. The debris retaining plate 20 is detachably connected to the cover plate 3 for easy assembly and disassembly. The debris retaining plate 20 has a metal layer to ensure the structural strength of the debris retaining plate 20. A flexible shielding strip 21 is provided on the outside of the metal layer. The flexible shielding strip 21 can shield the gap between the cover plate 3 and the rack beam 4 and abut against the rack beam 4, thereby effectively blocking the gap between the cover plate 3 and the rack beam 4, reducing the amount of external dirt entering the embedded box 2 and affecting the normal operation of the device. In this specific embodiment, the debris retaining plate 20 is a bent structure, which can also play a role in diverting rainwater, minimizing the amount of rainwater entering the device, and allowing the rainwater to flow away along the water retaining strip 18. The metal layer can provide stable support for the flexible shielding strip 21, ensuring the structural stability and working reliability of the debris retaining plate 20.

[0060] In addition, in other specific embodiments that can be realized by the present invention, a pad 22 can be set at the bottom of the cover plate 3 and the top and bottom of the rack beam 4. The pad 22 is set at the position where the cover plate 3 and the rack beam 4 are connected with the first elastic supporting element and the second elastic supporting element to provide a stable support surface for the first elastic supporting element and the second elastic supporting element. The pad 22 can be made of stainless steel to ensure the structural strength of the pad 22 while enhancing the corrosion resistance of the pad 22, extending the service life of the device, and reducing the welding workload in the production process of the rack beam 4, thereby saving production costs.

[0061] Embodiment 2

[0062] The present embodiment provides a comb-tooth type telescopic device. In the present embodiment, the support displacement system also includes a rotating pin 23, which is connected to the rack beam 4. The second clamping support 8 and the second pressure-bearing support 7 both have through holes that are compatible with the rotating pin 23. The rotating pin 23 extends from the top and bottom of the rack beam 4 and can be rotatably inserted into the through holes of the second clamping support 8 and the second pressure-bearing support 7. The rotating pin 23 provides a rotation axis for the rack beam 4 to deflect, thereby improving the ability of the device to adapt to changes in the horizontal direction of the bridge. The rack beam 4 is connected to the second pressure-bearing support 7 and the second clamping support 8 by the rotating pin 23, and the structure is compact and convenient for disassembly and assembly.

[0063] At the same time, the cover plate 3 and the embedded box 2 both have positioning pins 24, which extend into the through holes of the second clamping support 8 and the second pressure-bearing support 7 respectively, thereby realizing the installation and positioning of the second clamping support 8 and the second pressure-bearing support 7. It should be noted that there is a gap between the positioning pin 24 and the rotating pin 23 to avoid affecting the elastic deformation of the second clamping support 8 and the second pressure-bearing support 7, thereby ensuring that the device can adapt to changes in the vertical and horizontal directions of the bridge.

[0064] The other structures of the comb-tooth type telescopic device of this embodiment are the same as those of the first embodiment and will not be described again here.

[0065] Embodiment 3

[0066] This embodiment provides a comb-tooth type telescopic device. In this specific embodiment, the second pressure bearing support 7 is arranged between the fixed end of the rack beam 4 and the embedded box 2 and connected to the two, and the second clamping support 8 is arranged on the top of the fixed end of the rack beam 4 and connected to the rack beam 4. In this specific implementation, the second clamping support 8 and the second pressure bearing support 7 can be directly connected to the rack beam 4 and the embedded box 2, for example, by using the installation pin 9 of the first elastic support element or bonding connection. When the bonding connection method is adopted, the second elastic support element can adopt the same structure as the first support element, which reduces the difficulty of device production and saves production costs.

[0067] The other structures of the comb-tooth type telescopic device of this embodiment are the same as those of the first embodiment and will not be described again here.

[0068] Embodiment 4

[0069] This embodiment provides a bridge, including any one of the comb-tooth type telescopic devices in the above embodiments, which can adapt to changes in the bridge in the horizontal direction and the vertical direction, thereby improving the safety factor of the bridge.

[0070] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A comb-tooth type telescopic device, arranged in the gap between two adjacent beams (1) of a bridge, characterized in that: The comb-tooth type telescopic device comprises: A main body system, the main body system comprising a pre-buried box (2), a cover plate (3) and a rack beam (4), the pre-buried box (2) being arranged on the top of the beam body (1), the cover plate (3) being detachably connected to the pre-buried box (2); one end of the rack beam (4) being fixed in a space enclosed by the pre-buried box (2) and the cover plate (3) on one side of the gap, and the other end being slidably extended into a space enclosed by the pre-buried box (2) and the cover plate (3) on the other side of the gap, the number of the rack beams (4) being multiple groups, the multiple groups of the rack beams (4) being arranged in parallel, and the sliding directions of two adjacent rack beams (4) being opposite to each other to form a comb-tooth telescopic structure to adapt to the change of the gap; A support displacement system, the support displacement system comprising a first elastic support element and a second elastic support element, the first elastic support element being arranged at the sliding end of the rack beam (4), the first elastic support element comprising a first pressure-bearing support (5) and a first clamping support (6), the first pressure-bearing support (5) being located at the bottom of the rack beam (4), the first clamping support (6) being located at the top of the rack beam (4), and the first pressure-bearing support (5) and the first clamping support (6) being staggered in the vertical direction; the second elastic support element being arranged at the fixed end of the rack beam (4), the second elastic support element comprising a second pressure-bearing support (7) and a second clamping support (8), the second pressure-bearing support (7) being located at the bottom of the rack beam (4), and the second clamping support (8) being located at the top of the rack beam (4).

2. The comb-tooth type telescopic device according to claim 1, characterized in that: The first pressure-bearing support (5) is located on a side of the embedded box (2) close to the gap, and is in contact with the rack beam (4) and the embedded box (2); the first clamping support (6) is located at the end of the sliding end of the rack beam (4), and is in contact with the rack beam (4) and the cover plate (3).

3. The comb-tooth type telescopic device according to claim 2, characterized in that: The first pressure-bearing support (5) is connected to the embedded box (2) by means of a mounting pin (9), and the first clamping support (6) is connected to the rack beam (4) by means of a mounting pin (9); the first pressure-bearing support (5), the first clamping support (6), the embedded box (2) and the rack beam (4) all have mounting holes that are compatible with the mounting pin (9).

4. The comb-tooth type telescopic device according to any one of claims 1 to 3, characterized in that: The second pressure-bearing support (7) is arranged between the fixed end of the rack beam (4) and the embedded box (2) and is connected to the two, and the second clamping support (8) is arranged at the top of the fixed end of the rack beam (4) and is connected to the rack beam (4).

5. The comb-tooth type telescopic device according to any one of claims 1 to 3, characterized in that: The support displacement system further comprises a rotating column (10), the second elastic support element is connected to the rack beam (4) and the embedded box (2) by means of the rotating column (10), and the rack beam (4) is capable of rotating around the rotating column (10); The second elastic supporting element, the rack beam (4) and the embedded box (2) all have through holes that are compatible with the rotating column (10); an embedded nut (11) is provided at the bottom of the embedded box (2); one end of the rotating column (10) passes through the second clamping support (8), the rack beam (4), the second pressure-bearing support (7) and the embedded box (2) in sequence and is threadedly connected to the embedded nut (11); the end of the rotating column (10) extending from the second clamping support (8) is locked by a locking nut (13); and the cover plate (3) has a groove capable of accommodating the locking nut (13).

6. The comb-tooth type telescopic device according to any one of claims 1 to 3, characterized in that: The support displacement system further comprises a rotating pin (23), wherein the rotating pin (23) is connected to the rack beam (4), and the second pressing support (8) and the second pressure bearing support (7) both have through holes adapted to the rotating pin (23), and the rotating pin (23) extends from the top and bottom of the rack beam (4) and is rotatably extended into the through holes of the second pressing support (8) and the second pressure bearing support (7); The cover plate (3) and the embedded box (2) both have positioning pins (24), and the positioning pins (24) extend into the through holes of the second clamping support (8) and the second pressure-bearing support (7) respectively, and there is a gap between the positioning pins (24) and the rotating pins (23).

7. The comb-tooth type telescopic device according to claim 1, characterized in that: The embedded box (2) is provided with box ribs (14), a plurality of groups of the box ribs (14) are arranged in parallel, the sliding end of the rack beam (4) can extend into the gap between adjacent box ribs (14), and the cover plate (3) is bolted to the box ribs (14); The embedded box (2) is connected to the beam (1) by means of a plurality of groups of anchoring elements (15); one end of the anchoring element (15) is connected to the embedded box (2), and one end of the anchoring head of the anchoring element (15) is embedded in the beam (1).

8. The comb-tooth type telescopic device according to claim 1, characterized in that: A limit block (16) is provided at the bottom of the fixed end of the rack beam (4), and the limit block (16) can abut against a side of the second pressure bearing support (7) away from the gap to limit the extreme position of the rack beam (4); Limiting pins (17) are provided on both side surfaces of the fixed end of the rack beam (4) to limit the spacing between adjacent rack beams (4).

9. The comb-tooth type telescopic device according to claim 1, characterized in that: A water retaining strip (18) is provided at the bottom of the gap, and two adjacent beam bodies (1) are provided with embedded mounting parts (19) on one side close to the gap, and the water retaining strip (18) is bolted to the embedded mounting parts (19); The water retaining strip (18) is made of a trapezoidal sheet material, and two waists of the trapezoidal sheet material are bolted to the embedded mounting member (19) so that the bottom of the water retaining strip (18) gradually tilts downward along the length direction of the gap.

10. The comb-tooth type telescopic device according to claim 1, characterized in that: The rack beam (4) is a stepped structure, and a curved transition surface is provided at the step of the rack beam (4); A debris blocking plate (20) is arranged on one side of the cover plate (3) close to the gap, the debris blocking plate (20) being detachably connected to the cover plate (3), the debris blocking plate (20) having a flexible shielding strip (21), the flexible shielding strip (21) being able to shield the gap between the cover plate (3) and the rack beam (4) and to abut against the rack beam (4).

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