Bridge expansion device

Abstract

The invention relates to the technical field of building technologies, and provides a bridge expansion device which comprises two bridge bodies which are oppositely arranged, and further comprises anchoring mechanisms, toothed plates and a waterproof assembly, fixing plates are fixedly mounted on the two anchoring mechanisms, the anchoring mechanisms are used for fixedly connecting the fixing plates with the bridge bodies, and the toothed plates are fixedly connected with the waterproof assembly. A toothed plate is detachably arranged on the side, away from the anchoring mechanism, of each fixing plate, the toothed plates make contact with the bridge bodies, the waterproof assembly is arranged between the two bridge bodies, the waterproof assembly is arranged below the toothed plates, and the waterproof assembly is used for collecting water and dust flowing down between the two bridge bodies. The fixing plate is fixedly connected with the bridge body through the anchoring mechanism, the toothed plate is fixed to the fixing plate, and by means of the technical scheme, the problem that in the prior art, a bridge expansion device is prone to damage in the using process or parts are difficult to replace when the bridge expansion device is damaged is solved.

Description

Technical Field

[0001] The invention relates to the technical field of building technology, and in particular to a bridge expansion device. Background Art

[0002] With the acceleration of my country's urbanization process, the urban traffic network is becoming more and more perfect. Bridge structures such as viaducts and overpasses play an increasingly important role in urban traffic. However, as an important part of the bridge structure, the performance of the bridge expansion device directly affects the safety and comfort of the bridge road. The existing expansion devices have been found to have the following needs to be urgently addressed during long-term use: when vehicles pass, the noise and vibration generated by the expansion device have a significant impact on the surrounding environment and residents' lives; and the bridge expansion joint directly bears the impact of the wheel load and is exposed to the natural environment for a long time. The bridge expansion joint is the most vulnerable bridge structure. When the expansion device is damaged, the existing bridge expansion joint replacement technology is to chisel out the concrete used to install the expansion joint, remove the cross-bar, and then reinstall the new expansion joint and re-pour the concrete. The replacement method requires a lot of demolition, resulting in a lot of construction waste, and the replacement period is long; in order to ensure its strength, the expansion device on the market is generally made of metal material, which has less friction. In rainy and snowy weather, vehicles are prone to slipping when passing by.

[0003] The prior art discloses an application number: CN201811171953.9, a quickly replaceable comb plate bridge telescopic device, comprising a movable comb plate and a fixed comb plate, wherein the movable comb plate is detachably arranged on the first beam body, the rotating shaft is placed in the groove, the bolt passes through the first threaded hole and the second threaded hole and is connected to the axle seat, and the stud bolts are passed through the movable comb plate and the stainless steel slide plate. Although the bolts and the stud bolts can be easily replaced when they are damaged, the bolts are easily damaged due to the rotating setting of the rotating shaft, and the stud bolts are also easily damaged by the impact of the movable comb plate. At the same time, when the distance between the first beam body and the second beam body on the bridge is far, the movable comb plate is separated from the second beam body, and the passing vehicles are only supported by the movable comb plate, which is easy to be damaged. Summary of the invention

[0004] The present invention provides a bridge expansion device, which solves the problem in the prior art that the bridge expansion device is easily damaged during use or the parts are difficult to replace when damaged.

[0005] The technical solution of the present invention is as follows: A bridge expansion device comprises a bridge body, wherein two bridge bodies are provided, and the two bridge bodies are arranged opposite to each other, and further comprises an anchoring mechanism, a tooth plate, a supporting mechanism, a waterproof component and an anti-drop component, wherein the anchoring mechanisms are respectively fixedly arranged at similar positions on the two bridge bodies, and a fixing plate is fixedly installed on each of the two anchoring mechanisms, and the anchoring mechanism is used to fix the fixing plate to the bridge body, and a tooth plate is detachably provided on a side of each fixing plate away from the anchoring mechanism, and the tooth plate is in contact with the bridge body, and the supporting mechanism is detachably provided on the fixing plate. The supporting mechanisms are provided in plurality, and the plurality of supporting mechanisms are detachably connected to the tooth plate, and the supporting mechanism is used to support one end of the tooth plate away from the bridge body, the waterproof component is provided on the two fixed plates, and the waterproof component is provided between the two bridge bodies, and the waterproof component is provided below the tooth plate, and the waterproof component is used to collect water and dust flowing down between the two bridge bodies, and the anti-drop component is provided on the tooth plate and the fixed plate, and the anti-drop component is used to prevent the tooth plate from falling between the two bridge bodies after being separated from the fixed plate.

[0006] The tooth plate is provided with comb teeth, countersunk holes and dovetail grooves, and the comb teeth are provided in plurality, and the plurality of comb teeth are integrally formed with the tooth plate, and the comb teeth are arranged on a side of the tooth plate away from the fixed plate, and the countersunk hole is provided on each of the comb teeth, and the countersunk hole passes through the comb teeth, and the diameter of the countersunk hole close to the fixed plate is larger than the diameter of the fixed plate end away from the countersunk hole, and the dovetail groove is provided on the side of the tooth plate away from the comb teeth, and a plurality of bolt holes are provided on the tooth plate, and the bolt holes are provided between the dovetail groove and the countersunk holes, and removable anchor bolts are passed through the bolt holes.

[0007] An extension plate and an anchor sleeve are provided on the fixing plate. There are multiple extension plates, and the multiple extension plates are arranged on a side of the fixing plate away from the tooth plate. The extension plates and the comb teeth are staggered. The anchor sleeve is fixedly provided at a position on the fixing plate corresponding to the bolt hole. The anchor sleeve is arranged on a side of the fixing plate away from the tooth plate, and the anchor sleeve is detachably connected to the anchor bolt.

[0008] The anchoring mechanism includes a gate-shaped bar, an anchor steel bar and a cross steel bar. A plurality of gate-shaped bars are provided, and the plurality of gate-shaped bars are fixedly provided in the bridge body. The anchor steel bar is bent and fixedly connected to the extension plate. The cross steel bar is fixedly provided in the bridge body, and the cross steel bar is provided below the gate-shaped bar. An end of the anchor steel bar away from the extension plate is provided below the cross steel bar.

[0009] The waterproof assembly includes a support plate and a waterproof board. The support plate is fixedly mounted on a side of the extension plate away from the anchor steel bar. The support plate is arranged on a side of the anchor sleeve close to the tooth plate. Both sides of the waterproof board are detachably connected to the support plates on the two extension plates.

[0010] A rubber layer is sleeved on the tooth plate and the comb teeth on one side away from the fixing plate, and a plurality of anti-skid grooves are cross-cuttingly provided on the rubber layer.

[0011] The supporting mechanism includes a docking groove, an oblique slot, a connecting plate and a supporting bolt. The docking groove is arranged on a side of the comb tooth close to the waterproof component, the docking groove is communicated with the countersunk hole, the oblique slot is arranged on the extension plate, the connecting plate is detachably arranged on the oblique slot, a plurality of supporting sleeves are fixedly arranged on the connecting plate, the supporting sleeves correspond one to one to the comb teeth, the supporting bolts are detachably arranged in the supporting sleeves, a supporting block is detachably arranged in each of the docking grooves, a supporting groove is arranged on a side of the support block close to the extension plate, and an end of the supporting bolt away from the extension plate extends into the supporting groove.

[0012] The anti-drop assembly includes a C-shaped plate, a sliding groove and a clamping plate, the C-shaped plate is fixedly mounted on a side of the fixed plate away from the extension plate, the C-shaped plate is arranged on a side of the fixed plate away from the dovetail groove, the opening direction of the C-shaped plate faces the dovetail groove, the sliding groove is opened on the tooth plate, the C-shaped plate is slidably arranged in the sliding groove, the clamping plate is fixedly arranged in the sliding groove on a side away from the comb teeth, and the clamping plate corresponds to the C-shaped plate.

[0013] The working principle and beneficial effects of the present invention are: 1. The rubber layer provided in the present invention can effectively absorb the vibration generated when a vehicle passes by, reduce the impact between the vehicle and the telescopic device when the vehicle passes by, and thus reduce noise.

[0014] 2. In the present invention, by setting a support block and a support bolt, the connecting plate is inserted into the oblique slot, the support sleeve is aligned with the support groove, and the support screw is installed in the support sleeve between the tooth plates. Then, the support degree of the support screw to the support groove is adjusted by rotating the support screw. When the tooth plate is used for a long time, if the comb teeth are bent or the support screw is bent, the support angle of the tooth plate can be adjusted by rotating the support screw. When the comb teeth are continuously rolled and bent, the anchor bolt may be broken. The support of the support screw can reduce the pressure of the tooth plate on the anchor bolt, thereby extending the service life of the tooth plate and the anchor bolt. 3. In the present invention, by setting a C-shaped plate and a clamping plate, when the anchor bolt breaks, the tooth plate may move toward the gap between the bridge bodies under the action of the wheel. If the gap between the two bridge bodies is large, the tooth plate may fall. When disassembling the tooth plate, since the support bolts extend into the support grooves, it is necessary to slide the tooth plate. The tooth plate is heavy and may fall between the bridge bodies if it is not controlled well. When the tooth plate slides through the sliding groove, if the tooth plate is not lifted, the clamping plate will extend into the C-shaped plate, so that the tooth plate is fixed and difficult to move. Only by using equipment to lift the tooth plate can it be separated from the fixed plate; 4. In the present invention, a supporting mechanism is provided to support the comb teeth, thereby increasing the service life of the comb teeth and the anchor bolts. At the same time, the supporting screw does not affect the installation and disassembly of the tooth plate. The tooth plate can be replaced only by removing the anchor bolts. By supporting the anti-drop assembly, the tooth plate can be prevented from moving randomly after the anchor bolts break. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention (embodiment 1); Figure 2 It is a schematic diagram of the overall structure of the present invention (Example 2); Figure 3 It is another perspective structural schematic diagram of the whole of the present invention; Figure 4 It is a partial cross-sectional structural schematic diagram of the coordination of the anchoring mechanism and the supporting mechanism in the present invention; Figure 5 It is a partial cross-sectional structural schematic diagram of the matching of the tooth plate and the fixing plate in the present invention; Figure 6 It is a partial cross-sectional structural schematic diagram of the tooth plate and the supporting mechanism in the present invention; Figure 7 It is a partial cross-sectional structural schematic diagram of the matching of the tooth plate and the fixing plate in the present invention; Figure 8 It is a schematic diagram of a partial cross-sectional structure inside the support block of the present invention; Fig. 9 It is a schematic diagram of the partial cross-sectional structure of the cooperation between the C-shaped plate and the sliding groove in the present invention.

[0017] In the figure: 1. bridge body; 2. fixing plate; 3. tooth plate; 4. comb teeth; 5. countersunk hole; 6. docking groove; 7. dovetail groove; 8. bolt hole; 9. anchor bolt; 10. extension plate; 11. anchor sleeve; 12. door-shaped reinforcement; 13. anchor steel bar; 14. cross steel bar; 15. oblique slot; 16. connecting plate; 17. support sleeve; 18. support bolt; 19. support block; 20. support groove; 21. C-type plate; 22. sliding groove; 23. snap-in plate; 24. support plate; 25. waterproof board; 26. rubber layer; 27. anti-slip groove; 28. bolt cap. DETAILED DESCRIPTION

[0018] The following will be combined with 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. Example

[0019] like Figure 1 to Figure 9 As shown, this embodiment proposes a bridge expansion device, including a bridge body 1, wherein two bridge bodies 1 are provided, and the two bridge bodies 1 are arranged opposite to each other, and also include an anchoring mechanism, a tooth plate 3 and a waterproof component. The anchoring mechanisms are respectively fixedly arranged at similar positions on the two bridge bodies 1, and the two anchoring mechanisms are fixedly installed with a fixing plate 2, and the anchoring mechanism is used to fix the fixing plate 2 to the bridge body 1. A tooth plate 3 is detachably provided on a side of each fixing plate 2 away from the anchoring mechanism, and the tooth plate 3 is in contact with the bridge body 1. The waterproof component is arranged on the two fixing plates 2, the waterproof component is arranged between the two bridge bodies 1, and the waterproof component is arranged below the tooth plate 3. The waterproof component is used to collect water and dust flowing down between the two bridge bodies 1, and the fixing plate 2 is fixedly connected to the bridge body 1 by the anchoring mechanism, which is used to fix the tooth plate 3 on the fixing plate 2.

[0020] like Figure 1 to Figure 7As shown, the tooth plate 3 is provided with comb teeth 4, countersunk holes 5 and dovetail grooves 7, and a plurality of comb teeth 4 are provided. The plurality of comb teeth 4 are integrally formed with the tooth plate 3, and the comb teeth 4 are arranged on the side of the tooth plate 3 away from the fixed plate 2. A countersunk hole 5 is provided on each comb tooth 4, and the countersunk hole 5 passes through the comb tooth 4. The diameter of the countersunk hole 5 close to the fixed plate 2 is larger than the diameter of the fixed plate 2 away from the countersunk hole 5. The dovetail groove 7 is arranged on the side of the tooth plate 3 away from the comb teeth 4. A plurality of bolt holes 8 are provided on the tooth plate 3, and the bolt holes 8 are arranged between the dovetail grooves 7 and the countersunk holes 5. The bolt holes 8 are penetrated by removable anchor bolts 9. The comb teeth 4 on the two tooth plates 3 are staggered. When the distance between the bridge bodies 1 changes due to thermal expansion and contraction, the two comb teeth 4 move closer to and away from each other. The comb teeth 4 are above the gap between the bridge bodies 1. When a vehicle passes by, the tire rolls over the comb teeth 4. At this time, since the tooth plate 3 is fixed to the fixing plate 2 by the anchor bolts 9, the anchor bolts 9 are stressed, and a rubber layer 26 is sleeved on the side of the tooth plate 3 and the comb teeth 4 away from the fixing plate 2. A plurality of anti-skid grooves 27 are cross-opened on the rubber layer 26, and a bolt cap 28 is provided in the bolt hole 8 of the rubber layer 26, and the bolt cap 28 is sleeved on the anchor bolt 9. By laying the rubber layer 26, the shock of the vehicle passing through the tooth plate 3 is reduced, and the noise reduction effect is also achieved. The rubber layer 26 is connected to the surface of the tooth plate 3 by an adhesive, and the anchor bolt 9 is sleeved by setting the bolt cap 28 on the bolt hole 8 to make the surface of the rubber layer 26 smooth. By docking the rubber layer 26 with the dovetail groove 7, the connection between the rubber layer 26 and the tooth plate 3 is more firmly established and difficult to separate. The rubber layer 26 extends into the countersunk hole 5, making it difficult for the rubber layer 26 to be separated from the comb teeth 4.

[0021] like Figure 4~Figure 8As shown, an extension plate 10 and an anchor sleeve 11 are provided on the fixed plate 2, and a plurality of extension plates 10 are provided. The plurality of extension plates 10 are arranged on a side of the fixed plate 2 away from the tooth plate 3, and the extension plates 10 are staggered with the comb teeth 4. An anchor sleeve 11 is fixedly provided at a position corresponding to the bolt hole 8 on the fixed plate 2, and the anchor sleeve 11 is arranged on a side of the fixed plate 2 away from the tooth plate 3. The anchor sleeve 11 is detachably connected to the anchor bolt 9, and the anchoring mechanism includes a gate-shaped rib 12, an anchor steel bar 13 and a cross steel bar 14. A plurality of gate-shaped ribs 12 are provided, and the plurality of gate-shaped ribs 12 are fixedly arranged in the bridge body 1, and the anchor steel bar 13 is bent. 3 is fixedly connected with the extension plate 10, the cross-bar 14 is fixedly arranged in the bridge body 1, the cross-bar 14 is arranged below the gate-shaped bar 12, and the end of the anchoring bar 13 away from the extension plate 10 is arranged below the cross-bar 14. After the edge of the bridge body 1 is broken, the gate-shaped bar 12 is arranged on the bridge body 1, the cross-bar 14 is passed under the gate-shaped bar 12, and the anchoring bar 13 is passed under the cross-bar 14, and poured, so that the lower parts of the gate-shaped bar 12, the cross-bar 14 and the anchoring bar 13 are fixed on the bridge body 1, and the extension plate 10 is extended between the anchoring bars 13, and the extension plate 10 and the anchoring bars 13 are connected by welding.

[0022] like Figure 1~Figure 4 As shown, the waterproof assembly includes a support plate 24 and a waterproof plate 25. The support plate 24 is fixedly mounted on the side of the extension plate 10 away from the anchor steel bar 13. The support plate 24 is arranged on the side of the anchor sleeve 11 close to the tooth plate 3. The two sides of the waterproof plate 25 are detachably connected to the support plates 24 on the two extension plates 10.

[0023] In this embodiment, the anchoring steel bar 13, the gate-shaped bar 12, the anchoring sleeve 11 and the cross-shaped steel bar 14 are all fixed to the bridge body 1 by pouring concrete or adhesive, the extension plate 10 is welded to the anchoring steel bar 13, and the rubber layer 26 is fixed to the tooth plate 3. Under the action of thermal expansion and contraction of the bridge, the two bridge bodies 1 move closer to each other and the tooth plates 3 slide alternately. After a failure of the tooth plate 3, maintenance can be carried out by replacing the anchoring bolts 9. Since the anchoring sleeve 11 is fixed to the bridge body 1 by the gate-shaped bar 12, the fixing plate 2 and the anchoring steel bar 13, there is no need to destroy the bridge body 1 every time maintenance is performed. Example

[0024] A support mechanism and an anti-drop assembly are provided on the basis of the first embodiment. The support mechanism is detachably provided on the fixed plate 2. There are multiple support mechanisms provided. The multiple support mechanisms are detachably connected to the tooth plate 3. The support mechanism is used to support the end of the tooth plate 3 away from the bridge body 1. When the tire of a vehicle passes over the comb teeth 4, since the tooth plate 3 is fixed to the fixed plate 2 by the anchor bolts 9 and the support bolts 18, the anchor bolts 9 and the support bolts 18 are jointly stressed at this time. The anti-drop assembly is provided on the tooth plate 3 and the fixed plate 2. The anti-drop assembly is used to prevent the tooth plate 3 from falling between the two bridge bodies 1 after being separated from the fixed plate 2.

[0025] like Figure 4~Figure 8 As shown, the supporting mechanism includes a docking groove 6, an oblique slot 15, a connecting plate 16 and a supporting bolt 18. The docking groove 6 is arranged on the comb tooth 4 on the side close to the waterproof component, the docking groove 6 is connected to the countersunk hole 5, the oblique slot 15 is arranged on the extension plate 10, the connecting plate 16 is detachably arranged on the oblique slot 15, a plurality of supporting sleeves 17 are fixedly arranged on the connecting plate 16, the supporting sleeves 17 correspond to the comb teeth 4 one by one, the supporting bolt 18 is detachably arranged in the supporting sleeve 17 by thread, and a supporting block 19 is detachably arranged in each docking groove 6, a supporting groove 20 is arranged on the side of the supporting block 19 close to the extension plate 10, an end of the supporting bolt 18 away from the extension plate 10 extends into the supporting groove 20, and the connecting plate 16 is inserted into the oblique slot 15. In the embodiment, the support sleeve 17 is aligned with the support groove 20, and the support screw is installed in the support sleeve 17 before the tooth plate 3 is installed. Then, the support degree of the support screw to the support groove 20 is adjusted by rotating the support screw. When the tooth plate 3 is used for a long time, if the comb teeth 4 are bent or the support screw is bent, the support angle of the tooth plate 3 can be adjusted by rotating the support screw. When the comb teeth 4 are continuously bent due to rolling, the anchor bolt 9 may be broken. The support of the support screw can reduce the pressure of the tooth plate 3 on the anchor bolt 9, thereby extending the service life of the tooth plate 3 and the anchor bolt 9. When maintenance is needed, only the tooth plate 3, the anchor bolt 9 and the support bolt 18 can be replaced, and there is no need to remove the anchoring mechanism.

[0026] like Figure 6 and Fig. 9As shown, the anti-drop assembly includes a C-shaped plate 21, a sliding groove 22 and a clamping plate 23. The C-shaped plate 21 is fixedly mounted on the fixed plate 2 on a side away from the extension plate 10. The C-shaped plate 21 is arranged on a side of the fixed plate 2 away from the dovetail groove 7. The opening direction of the C-shaped plate 21 faces the dovetail groove 7. The sliding groove 22 is arranged on the tooth plate 3. The C-shaped plate 21 is slidably arranged in the sliding groove 22. The clamping plate 23 is fixedly arranged in the sliding groove 22 on a side away from the comb teeth 4. The clamping plate 23 corresponds to the C-shaped plate 21. When the anchor bolt 9 breaks, the tooth plate 3 may be in the vehicle. Under the action of that, it moves toward the gap between the bridge bodies 1. If the gap between the two bridge bodies 1 is large, the tooth plate 3 may fall. When disassembling the tooth plate 3, since the support bolts 18 extend into the support grooves 20, it is necessary to slide the tooth plate 3. The tooth plate 3 is heavy and may fall between the bridge bodies 1 if it is not controlled well. When the tooth plate 3 slides through the sliding groove 22, if the tooth plate 3 is not lifted, the clamping plate 23 will extend into the C-shaped plate 21, so that the tooth plate 3 is fixed and difficult to move. Only by using equipment to lift the tooth plate 3 can it be separated from the fixed plate 2.

[0027] The connecting plate 16 is inserted into the oblique slot 15, and the support bolt 18 is rotated and fixed on the support sleeve 17. The support block 19 is connected to the docking groove 6, and the tooth plate 3 is placed on the fixed plate 2. The support bolt 18 is inserted into the support groove 20, and the anchor bolt 9 is threadedly connected to the anchor sleeve 11 through the bolt hole 8. When the vehicle rolls over the tooth plate 3, the support of the support bolt 18 to the tooth plate 3 extends the service life of the tooth plate 3 and the anchor bolt 9. At the same time, the clamping plate 23 and the sliding groove 22 can enhance the stability of the tooth plate 3, and at the same time, it can prevent the tooth plate 3 from sliding on the bridge body 1 when it is disassembled and installed, or when the anchor bolt 9 is damaged.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridge expansion device, comprising a bridge body (1), wherein two bridge bodies (1) are provided, and the two bridge bodies (1) are arranged opposite to each other, and characterized in that: Also includes: Anchoring mechanisms, the anchoring mechanisms being fixedly arranged at similar positions on the two bridge bodies (1), respectively, and fixing plates (2) being fixedly mounted on the two anchoring mechanisms, and the anchoring mechanisms being used to fixedly connect the fixing plates (2) to the bridge bodies (1); A tooth plate (3), wherein a tooth plate (3) is detachably provided on a side of each fixing plate (2) away from the anchoring mechanism, and the tooth plate (3) is in contact with the bridge body (1); A waterproof component, the waterproof component is arranged on the two fixing plates (2), the waterproof component is arranged between the two bridge bodies (1), the waterproof component is arranged below the tooth plate (3), and the waterproof component is used to collect water and dust flowing down between the two bridge bodies (1).

2. A bridge expansion device according to claim 1, characterized in that: The tooth plate (3) is provided with: Comb teeth (4), a plurality of the comb teeth (4) are provided, the plurality of comb teeth (4) are integrally formed with the tooth plate (3), and the comb teeth (4) are provided on a side of the tooth plate (3) away from the fixed plate (2); A countersunk hole (5), each of the comb teeth (4) is provided with the countersunk hole (5), the countersunk hole (5) passes through the comb teeth (4), and the diameter of the countersunk hole (5) at one end close to the fixing plate (2) is larger than the diameter of the end of the fixing plate (2) away from the countersunk hole (5); A dovetail groove (7), wherein the dovetail groove (7) is provided on a side of the tooth plate (3) away from the comb teeth (4).

3. A bridge expansion device according to claim 2, characterized in that: The tooth plate (3) is provided with a plurality of bolt holes (8), wherein the bolt holes (8) are provided between the dovetail groove (7) and the countersunk hole (5), and anchor bolts (9) are detachably provided through the bolt holes (8).

4. A bridge expansion device according to claim 3, characterized in that: The fixing plate (2) is provided with: an extension plate (10), wherein a plurality of the extension plates (10) are provided, and the plurality of the extension plates (10) are arranged on a side of the fixed plate (2) away from the tooth plate (3), and the extension plates (10) and the comb teeth (4) are arranged in a staggered manner; An anchor sleeve (11), the anchor sleeve (11) being fixedly arranged at a position on the fixing plate (2) corresponding to the bolt hole (8), the anchor sleeve (11) being arranged on a side of the fixing plate (2) away from the tooth plate (3), and the anchor sleeve (11) being detachably connected to the anchor bolt (9).

5. A bridge expansion device according to claim 4, characterized in that: The anchoring mechanism comprises: A door-shaped rib (12), wherein a plurality of the door-shaped ribs (12) are provided, and the plurality of the door-shaped ribs (12) are fixedly arranged in the bridge body (1); Anchoring steel bars (13), the anchoring steel bars (13) being arranged in a bent state, and the anchoring steel bars (13) being fixedly connected to the extension plate (10); A cross-bar (14), wherein the cross-bar (14) is fixedly arranged in the bridge body (1), the cross-bar (14) is arranged below the gate-shaped bar (12), and an end of the anchor bar (13) away from the extension plate (10) is arranged below the cross-bar (14).

6. A bridge expansion device according to claim 5, characterized in that: The waterproof component comprises: a support plate (24), the support plate (24) being fixedly mounted on a side of the extension plate (10) away from the anchoring steel bar (13), the support plate (24) being arranged on a side of the anchoring sleeve (11) close to the tooth plate (3); A waterproof plate (25), two sides of the waterproof plate (25) being detachably connected to the support plates (24) on the two extension plates (10).

7. A bridge expansion device according to claim 6, characterized in that: A rubber layer (26) is sleeved on the tooth plate (3) and the comb teeth (4) on a side away from the fixed plate (2), and a plurality of anti-slip grooves (27) are cross-cuttingly provided on the rubber layer (26).

8. The bridge expansion device according to claim 7, characterized in that: It also includes a support mechanism, which is detachably arranged on the fixing plate (2), and a plurality of the support mechanisms are provided, and the plurality of support mechanisms are detachably connected to the tooth plate (3), and the support mechanism is used to support an end of the tooth plate (3) away from the bridge body (1); The supporting mechanism comprises: A docking groove (6), the docking groove (6) being arranged on a side of the comb teeth (4) close to the waterproof component, the docking groove (6) being connected to the countersunk hole (5); An oblique slot (15), the oblique slot (15) being formed on the extension plate (10); A connecting plate (16), the connecting plate (16) being detachably arranged on the oblique slot (15), a plurality of supporting sleeves (17) being fixedly arranged on the connecting plate (16), the supporting sleeves (17) corresponding one to one with the comb teeth (4); A support bolt (18), wherein the support bolt (18) is threadably disposed in the support sleeve (17).

9. The bridge expansion device according to claim 8, characterized in that: A support block (19) is detachably provided in each of the docking grooves (6), a support groove (20) is provided on a side of the support block (19) close to the extension plate (10), and an end of the support bolt (18) away from the extension plate (10) extends into the support groove (20).

10. The bridge expansion device according to claim 9, characterized in that: It also includes an anti-drop component, which is arranged on the tooth plate (3) and the fixing plate (2), and is used to prevent the tooth plate (3) from falling between the two bridge bodies (1) after being separated from the fixing plate (2); The anti-drop assembly comprises: A C-shaped plate (21), the C-shaped plate (21) being fixedly mounted on a side of the fixed plate (2) away from the extension plate (10), the C-shaped plate (21) being arranged on a side of the fixed plate (2) away from the dovetail groove (7), and the opening direction of the C-shaped plate (21) being oriented toward the dovetail groove (7); A sliding groove (22), wherein the sliding groove (22) is provided on the tooth plate (3), and the C-shaped plate (21) is slidably arranged in the sliding groove (22); A clamping plate (23), the clamping plate (23) being fixedly arranged on a side of the sliding groove (22) away from the comb teeth (4), the clamping plate (23) corresponding to the C-shaped plate (21).

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