A bridge expansion device

Abstract

The present invention relates to the technical field of building technology and provides a bridge expansion device, which includes bridge bodies. There are two bridge bodies arranged oppositely. The device further includes an anchoring mechanism, a toothed plate, and a waterproof component. Fixed plates are fixedly installed on both anchoring mechanisms. The anchoring mechanism is used to fixedly connect the fixed plate to the bridge body. A toothed plate is detachably arranged on one side of each fixed plate away from the anchoring mechanism, and the toothed plate is in contact with the bridge body. The waterproof component is arranged between the two bridge bodies and below the toothed plate. The waterproof component is used to collect water and dust flowing between the two bridge bodies. The fixed plate is fixedly connected to the bridge body through the anchoring mechanism, and the toothed plate is fixed on the fixed plate. Through the above technical solution, the problems in the prior art that the bridge expansion device is prone to damage during use or the components are difficult to replace when damaged are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction technology, and specifically, to a bridge expansion device. Background Art

[0002] With the acceleration of the urbanization process in China, the urban traffic network is becoming increasingly 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 following problems have been found in the long-term use of existing expansion devices and need to be solved urgently: When vehicles pass through, the noise and vibration generated by the expansion device have a certain impact on the surrounding environment and the lives of residents; moreover, the bridge expansion joint directly bears the impact of wheel loads 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 the concrete used for installing the expansion joint, remove the transverse steel bars, and then reinstall the new expansion joint and pour the concrete again. Its replacement method requires a large amount of demolition, resulting in a large amount of construction waste and a long replacement period; in order to ensure its strength, the expansion devices on the market generally use metal materials, and their friction is small. In rainy and snowy weather, vehicles are prone to skidding when passing by.

[0003] The prior art discloses a comb-tooth plate bridge expansion device with an application number of CN201811171953.9, which includes a movable comb-tooth plate and a fixed comb-tooth plate. The movable comb-tooth 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 then is connected to the shaft seat. The double-headed bolt passes through the movable comb-tooth plate and the stainless steel slide plate. Although the bolts and the double-headed bolts can be conveniently replaced when damaged, due to the rotational setting of the rotating shaft, the bolts are prone to damage, which also causes the double-headed bolts to be easily damaged by the impact of the movable comb-tooth 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-tooth plate is separated from the second beam body, and only the movable comb-tooth plate is used to support the passing vehicles, which is easy to be damaged. Summary of the Invention

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

[0005] The technical solution of the present invention is as follows:

[0006] A bridge expansion device, comprising a bridge body, there are two bridge bodies, the two bridge bodies are arranged oppositely, and further comprising an anchoring mechanism, a toothed plate, a support mechanism, a waterproof component and an anti-falling component. The anchoring mechanisms are respectively fixedly arranged at positions close to each other on the two bridge bodies. Fixed plates are fixedly installed on both of the two anchoring mechanisms. The anchoring mechanism is used to fixedly connect the fixed plate with the bridge body. A toothed plate is detachably arranged on one side of each fixed plate away from the anchoring mechanism. The toothed plate is in contact with the bridge body. The support mechanism is detachably arranged on the fixed plate. There are multiple support mechanisms, and the multiple support mechanisms are detachably connected to the toothed plate. The support mechanism is used to support one end of the toothed plate away from the bridge body. The waterproof component is arranged on the two fixed plates, between the two bridge bodies, and below the toothed plate. The waterproof component is used to collect water and dust flowing between the two bridge bodies. The anti-falling component is arranged on the toothed plate and the fixed plate, and is used to prevent the toothed plate from falling between the two bridge bodies after being separated from the fixed plate.

[0007] The toothed plate is provided with comb teeth, countersunk holes and dovetail grooves. There are multiple comb teeth, and the multiple comb teeth are integrally formed with the toothed plate. The comb teeth are arranged on one side of the toothed plate away from the fixed plate. Each comb tooth is provided with a countersunk hole, and the countersunk hole penetrates through the comb tooth. The diameter of the countersunk hole at one end close to the fixed plate is larger than the diameter of the end away from the fixed plate of the countersunk hole. The dovetail groove is opened on one side of the toothed plate away from the comb teeth. Multiple bolt holes are opened on the toothed plate, and the bolt holes are opened between the dovetail groove and the countersunk hole. An anchoring bolt is detachably arranged through the bolt hole.

[0008] The fixed plate is provided with extension plates and anchoring sleeves. There are multiple extension plates, and the multiple extension plates are arranged on one side of the fixed plate away from the toothed plate. The extension plates are arranged in a staggered manner with the comb teeth. The anchoring sleeves are fixedly arranged at positions corresponding to the bolt holes on the fixed plate. The anchoring sleeves are arranged on one side of the fixed plate away from the toothed plate. The anchoring sleeves are detachably connected to the anchoring bolts.

[0009] The anchoring mechanism includes U-shaped ribs, anchoring steel bars and transverse steel bars. There are multiple U-shaped ribs, and the multiple U-shaped ribs are fixedly arranged in the bridge body. The anchoring steel bar is bent, and the anchoring steel bar is fixedly connected to the extension plate. The transverse steel bar is fixedly arranged in the bridge body. The transverse steel bar is arranged below the U-shaped rib. One end of the anchoring steel bar away from the extension plate is arranged below the transverse steel bar.

[0010] The waterproof component includes a support plate and a waterproof plate. The support plate is fixedly installed on the side of the extension plate away from the anchor reinforcement. The support plate is arranged on the side of the anchor sleeve close to the tooth plate. The two sides of the waterproof plate are detachably connected to the support plates on the two extension plates.

[0011] A rubber layer is sleeved on the side of the tooth plate and the comb teeth away from the fixed plate, and a plurality of anti-slip grooves are cross-opened on the rubber layer.

[0012] The support mechanism includes a docking groove, an inclined slot, a connecting plate and a support bolt. The docking groove is opened on the side of the comb teeth close to the waterproof component, and the docking groove communicates with the counterbore. The inclined slot is opened on the extension plate. The connecting plate is detachably arranged on the inclined slot. A plurality of support sleeves are fixedly arranged on the connecting plate, and the support sleeves correspond to the comb teeth one by one. The support bolt is threadedly and detachably arranged in the support sleeve. A support block is detachably arranged in each docking groove. A support groove is opened on the side of the support block close to the extension plate. One end of the support bolt away from the extension plate extends into the support groove.

[0013] The anti-falling component includes a C-shaped plate, a sliding groove and a clamping plate. The C-shaped plate is fixedly installed on the side of the fixed plate away from the extension plate. The C-shaped plate is arranged on the 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 on the side of the sliding groove away from the comb teeth, and the clamping plate corresponds to the C-shaped plate.

[0014] The working principle and beneficial effects of the present invention are as follows:

[0015] 1. In the present invention, the rubber layer is provided to effectively absorb the vibration generated when the vehicle passes by, reduce the impact between the vehicle and the expansion device when passing by, and thus reduce the noise.

[0016] 2. In the present invention, by providing the support block and the support bolt, the connecting plate is inserted into the inclined slot, the support sleeve is aligned with the support groove, the support screw is installed in the support sleeve before installing the tooth plate, and then the support degree of the support screw on 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 bent under rolling, it may cause the anchor bolt to break. The support of the support screw can reduce the pressure of the tooth plate on the anchor bolt, thereby prolonging the service life of the tooth plate and the anchor bolt;

[0017] 3. In the present invention, by providing a C-shaped plate and a clamping plate, when the anchoring bolt breaks, the toothed plate may move towards the gap between the bridge bodies under the action of the vehicle weight. If the gap between the two bridge bodies is large, the toothed plate may fall off. When disassembling the toothed plate, since the support bolt extends into the support groove, the toothed plate needs to be slid. The toothed plate is heavy and may fall between the bridge bodies if not controlled properly. Through the sliding groove, when the toothed plate slides, if the toothed plate is not lifted, the clamping plate will extend into the C-shaped plate, making the toothed plate fixed and difficult to move. Only by using equipment to lift the toothed plate can it be separated from the fixing plate.

[0018] 4. In the present invention, by providing a support mechanism, the comb teeth can be supported, increasing the service life of the comb teeth and the anchoring bolts. At the same time, the support screw does not affect the installation and disassembly of the toothed plate. The replacement of the toothed plate can be achieved only by disassembling the anchoring bolts. Through the support and anti-falling component, the toothed plate can be prevented from moving randomly after the anchoring bolt breaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure in the present invention (Embodiment 1);

[0021] Figure 2 It is a schematic diagram of the overall structure in the present invention (Embodiment 2);

[0022] Figure 3 It is a schematic diagram of the overall structure from another perspective in the present invention;

[0023] Figure 4 It is a partial sectional structure schematic diagram of the cooperation between the anchoring mechanism and the support mechanism in the present invention;

[0024] Figure 5 It is a partial sectional structure schematic diagram of the cooperation between the toothed plate and the fixing plate in the present invention;

[0025] Figure 6 It is a partial sectional structure schematic diagram of the toothed plate and the support mechanism in the present invention;

[0026] Figure 7 It is a partial sectional structure schematic diagram of the cooperation between the toothed plate and the fixing plate in the present invention;

[0027] Figure 8 It is a partial sectional structure schematic diagram inside the support block in the present invention;

[0028] Figure 9 It is a partial sectional structure schematic diagram of the cooperation between the C-shaped plate and the sliding groove in the present invention.

[0029] In the figure: 1, bridge body; 2, fixing plate; 3, toothed 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, portal rib; 13, anchor reinforcement; 14, transverse reinforcement; 15, inclined slot; 16, connecting plate; 17, support sleeve; 18, support bolt; 19, support block; 20, support groove; 21, C-shaped plate; 22, sliding slot; 23, clamping plate; 24, supporting plate; 25, waterproof plate; 26, rubber layer; 27, anti-slip groove; 28, bolt cap. Detailed implementation manner

[0030] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0031] As Figures 1 to 9 shown, this embodiment proposes a bridge expansion device, including a bridge body 1. There are two bridge bodies 1, and the two bridge bodies 1 are arranged oppositely. It also includes an anchoring mechanism, a toothed plate 3 and a waterproof component. The anchoring mechanisms are respectively fixedly arranged at positions close to each other on the two bridge bodies 1. Fixed plates 2 are fixedly installed on both of the two anchoring mechanisms. The anchoring mechanism is used to fixedly connect the fixed plate 2 to the bridge body 1. A toothed plate 3 is detachably arranged on one side of each fixed plate 2 away from the anchoring mechanism. The toothed plate 3 is in contact with the bridge body 1. The waterproof component is arranged on the two fixed plates 2, between the two bridge bodies 1, and below the toothed plate 3. The waterproof component is used to collect the water and dust flowing between the two bridge bodies 1. The fixed plate 2 is fixedly connected to the bridge body 1 through the anchoring mechanism, and the toothed plate 3 is fixed on the fixed plate 2.

[0032] As Figures 1 to 7As shown in the figure, the comb teeth 4, counterbore holes 5 and dovetail grooves 7 are provided on the tooth plate 3. There are multiple comb teeth 4, and the multiple comb teeth 4 are integrally formed with the tooth plate 3. The comb teeth 4 are arranged on the side of the tooth plate 3 away from the fixed plate 2. A counterbore hole 5 is provided on each comb tooth 4, and the counterbore hole 5 penetrates through the comb tooth 4. The diameter of the counterbore hole 5 at the end close to the fixed plate 2 is larger than the diameter of the end away from the fixed plate 2 of the counterbore hole 5. The dovetail groove 7 is opened on the side of the tooth plate 3 away from the comb teeth 4. A plurality of bolt holes 8 are opened on the tooth plate 3, and the bolt holes 8 are opened between the dovetail groove 7 and the counterbore hole 5. An anchor bolt 9 is detachably arranged through the bolt hole 8. The comb teeth 4 on the two tooth plates 3 are arranged staggeredly. When the distance between the bridge bodies 1 changes due to the thermal expansion and contraction of the bridge, the two comb teeth 4 approach and move away from each other. The comb teeth 4 are above the gap between the bridge bodies 1. When a vehicle passes by, the tires roll over the comb teeth 4. At this time, since the tooth plate 3 is fixed to the fixed plate 2 through the anchor bolt 9, the anchor bolt 9 is stressed. A rubber layer 26 is sleeved on the side of the tooth plate 3 and the comb teeth 4 away from the fixed plate 2. A plurality of anti-slip grooves 27 are cross-opened on the rubber layer 26. 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 vehicle passing through the tooth plate 3 is shock-absorbed, and at the same time, a noise reduction effect is achieved. The rubber layer 26 is connected to the surface of the tooth plate 3 through an adhesive. By arranging the bolt cap 28 on the bolt hole 8 to sleeve the anchor bolt 9, the surface of the rubber layer 26 is made flat. Through the butt joint of the rubber layer 26 and the dovetail groove 7, the connection between the rubber layer 26 and the tooth plate 3 is made more firm and difficult to separate. By extending the rubber layer 26 into the counterbore hole 5, the rubber layer 26 is difficult to separate from the comb teeth 4.

[0033] As Figures 4 to 8As shown in the figure, an extension plate 10 and an anchoring sleeve 11 are provided on the fixing plate 2. There are multiple extension plates 10, and the multiple extension plates 10 are arranged on one side of the fixing plate 2 away from the tooth plate 3. The extension plates 10 are arranged in a staggered manner with the comb teeth 4. An anchoring sleeve 11 is fixedly arranged at a position on the fixing plate 2 corresponding to the bolt hole 8. The anchoring sleeve 11 is arranged on one side of the fixing plate 2 away from the tooth plate 3. The anchoring sleeve 11 is detachably connected to the anchoring bolt 9. The anchoring mechanism includes a portal rib 12, an anchoring steel bar 13 and a transverse steel bar 14. There are multiple portal ribs 12, and the multiple portal ribs 12 are fixedly arranged in the bridge body 1. The anchoring steel bar 13 is bent, and the anchoring steel bar 13 is fixedly connected to the extension plate 10. The transverse steel bar 14 is fixedly arranged in the bridge body 1. The transverse steel bar 14 is arranged below the portal rib 12. One end of the anchoring steel bar 13 away from the extension plate 10 is arranged below the transverse steel bar 14. After the edge of the bridge body 1 is broken, the portal rib 12 is arranged at the bridge body 1, the transverse steel bar 14 is passed through below the portal rib 12, and the anchoring steel bar 13 is bypassed below the transverse steel bar 14, and then concrete is poured, so that the lower parts of the portal rib 12, the transverse steel bar 14 and the anchoring steel bar 13 are fixed on the bridge body 1. The extension plate 10 is extended between the anchoring steel bars 13, and the extension plate 10 is connected to the anchoring steel bar 13 by welding.

[0034] As Figures 1 to 4 shown, the waterproof component includes a support plate 24 and a waterproof plate 25. The support plate 24 is fixedly installed on one side of the extension plate 10 away from the anchoring steel bar 13. The support plate 24 is arranged on one side of the anchoring sleeve 11 close to the tooth plate 3. Both sides of the waterproof plate 25 are detachably connected to the support plates 24 on the two extension plates 10.

[0035] In this embodiment, the anchoring steel bar 13, the portal rib 12, the anchoring sleeve 11 and the transverse steel bar 14 are all fixed on the bridge body 1 by pouring with concrete or adhesive. The extension plate 10 is welded to the anchoring steel bar 13. The rubber layer 26 is fixed on the tooth plate 3. Under the action of thermal expansion and contraction of the bridge, the two bridge bodies 1 approach and move away from each other, and the tooth plates 3 slide in a staggered manner. After the tooth plate 3 fails, it can be maintained by replacing the anchoring bolt 9. Since the anchoring sleeve 11 is fixed in the bridge body 1 through the portal rib 12, the fixing plate 2 and the anchoring steel bar 13, it is not necessary to damage the bridge body 1 every time for maintenance. Embodiment

[0036] On the basis of the first embodiment, a support mechanism and a falling prevention component are provided. The support mechanism is detachably arranged on the fixed plate 2. There are multiple support mechanisms, and the multiple support mechanisms are detachably connected to the toothed plate 3. The support mechanism is used to support one end of the toothed plate 3 far from the bridge body 1. When the vehicle passes by and the tire rolls over the comb teeth 4, since the toothed plate 3 is fixed to the fixed plate 2 by the anchor bolts 9 and the support bolts 18, at this time, the anchor bolts 9 and the support bolts 18 bear the force together. The falling prevention component is arranged on the toothed plate 3 and the fixed plate 2, and the falling prevention component is used to prevent the toothed plate 3 from falling between the two bridge bodies 1 after being separated from the fixed plate 2.

[0037] As Figures 4 to 8 shown, the support mechanism includes a docking groove 6, an inclined slot 15, a connecting plate 16 and a support bolt 18. The docking groove 6 is opened on one side of the comb teeth 4 close to the waterproof component. The docking groove 6 communicates with the counterbore 5. The inclined slot 15 is opened on the extension plate 10. The connecting plate 16 is detachably arranged in the inclined slot 15. A plurality of support sleeves 17 are fixedly arranged on the connecting plate 16. The support sleeves 17 correspond to the comb teeth 4 one by one. The support bolt 18 is threadedly and detachably arranged in the support sleeve 17. A support block 19 can be detachably arranged in each docking groove 6. A support groove 20 is opened on one side of the support block 19 close to the extension plate 10. One end of the support bolt 18 far from the extension plate 10 extends into the support groove 20. The connecting plate 16 is inserted into the inclined slot 15, and the support sleeve 17 is aligned with the support groove 20. Before installing the toothed plate 3, the support screw is installed in the support sleeve 17, and then the support degree of the support screw on the support groove 20 is adjusted by rotating the support screw. When the toothed plate 3 has been used for a long time, if the comb teeth 4 are bent or the support screw is bent, the support angle of the toothed plate 3 can be adjusted by rotating the support screw. When the comb teeth 4 are continuously bent under rolling, it may cause the anchor bolt 9 to break. The support of the support screw can reduce the pressure of the toothed plate 3 on the anchor bolt 9, thereby extending the service life of the toothed plate 3 and the anchor bolt 9. When maintenance is required, only the toothed plate 3, the anchor bolt 9 and the support bolt 18 can be replaced, and the anchoring mechanism does not need to be removed.

[0038] As Figure 6 and Figure 9As shown in the figure, the anti-falling component includes a C-shaped plate 21, a sliding groove 22 and a clamping plate 23. The C-shaped plate 21 is fixedly installed on one side of the fixed plate 2 away from the extension plate 10. The C-shaped plate 21 is arranged on one 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 opened on the toothed plate 3. The C-shaped plate 21 is slidably arranged in the sliding groove 22. The clamping plate 23 is fixedly arranged on one side of the sliding groove 22 away from the comb teeth 4. The clamping plate 23 corresponds to the C-shaped plate 21. When the anchor bolt 9 breaks, the toothed plate 3 may move towards the gap between the bridge bodies 1 under the action of the vehicle weight. If the gap between the two bridge bodies 1 is large, the toothed plate 3 may fall off. When disassembling the toothed plate 3, since the support bolt 18 extends into the support groove 20, it is necessary to slide the toothed plate 3. The toothed plate 3 is heavy and may fall between the bridge bodies 1 if not controlled properly. Through the sliding groove 22, when the toothed plate 3 slides, if the toothed plate 3 is not lifted, the clamping plate 23 will extend into the C-shaped plate 21, making the toothed plate 3 fixed and difficult to move. Only by using equipment to lift the toothed plate 3 can it be separated from the fixed plate 2.

[0039] The connecting plate 16 is inserted into the inclined slot 15, and the support bolt 18 is rotationally fixed on the support sleeve 17. The support block 19 is connected to the docking groove 6. The toothed plate 3 is placed on the fixed plate 2, and the support bolt 18 is extended into the support groove 20. The anchor bolt 9 is threadedly connected to the anchor sleeve 11 through the bolt hole 8. When the vehicle rolls on the toothed plate 3, the support of the support bolt 18 for the toothed plate 3 extends the service life of the toothed plate 3 and the anchor bolt 9. At the same time, through the clamping plate 23 and the sliding groove 22, the stability of the toothed plate 3 can be enhanced, and at the same time, it is avoided that the toothed plate 3 slides on the bridge body 1 during disassembly and installation or when the anchor bolt 9 is damaged.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall 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); 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), the dovetail groove (7) being formed on a side of the tooth plate (3) away from the comb teeth (4); 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); An extension plate (10) and an anchoring sleeve (11) are provided on the fixing plate (2), a plurality of the extension plates (10) are provided, and the plurality of the extension plates (10) are provided on a side of the fixing plate (2) away from the tooth plate (3), the extension plates (10) and the comb teeth (4) are arranged in a staggered manner, the anchoring sleeve (11) is fixedly provided at a position on the fixing plate (2) corresponding to the bolt hole (8), the anchoring sleeve (11) is provided on a side of the fixing plate (2) away from the tooth plate (3), and the anchoring sleeve (11) is detachably connected to the anchoring bolt (9); 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).

2. A bridge expansion device according to claim 1, 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).

3. A bridge expansion device according to claim 2, 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).

4. A bridge expansion device according to claim 3, 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).

5. A bridge expansion device according to claim 4, 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).

6. A bridge expansion device according to claim 5, 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).

Images