Expansion joint
By designing slidable moving seam plates and traction parts, the noise and blockage of bridge expansion joints are solved, and the low-noise, smooth vehicle passage and bridge safety are achieved.
Patent Information
- Application Number
- CN202411327500.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2024-12-13
AI Technical Summary
Existing bridge expansion joints are prone to noise and jumping when vehicles pass through, and are easily blocked by debris, affecting driving comfort and bridge safety.
A telescopic seam including two fixed seam components, a moving seam component, a wheel set and a traction member is designed. The width of the moving seam plate is gradually increased, and the sliding fit with the fixed seam component is achieved through the wheel set and the traction member. , adapt to the longitudinal expansion and contraction of the bridge, avoiding gap expansion and debris blockage.
It realizes low-noise and smooth vehicle passage, reduces the possibility of debris blockage, and improves the safety and service life of the bridge.
Smart Images
Figure CN119121780A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of bridges, and in particular to an expansion joint. Background Art
[0002] The expansion joints of bridges are used to reduce the internal forces of bridge beams caused by temperature. They are usually set at certain intervals to meet the deformation requirements of bridges. In order to ensure smooth driving of vehicles, no sudden jumps and noise, and to ensure the safety of the main structure of the bridge, expansion joint components need to be set at the top of the joints. The expansion joint components can not only ensure smooth driving of vehicles, but also protect the bridge.
[0003] The expansion joints vary according to the type of bridge. At present, the deformation of expansion joints is generally between 40 and 3200 mm. In daily use, except for suspension bridges and cable-stayed bridges, the expansion of common beam bridges is generally within 160 mm. Within this range, expansion joints are usually in the form of steel expansion joints and comb-tooth expansion joints.
[0004] The steel expansion joint is usually made of rubber or polyurethane material filled between two steels. When the expansion and contraction deformation is large, steel is added in the middle to ensure smooth driving of the vehicle, such as the Chinese utility model patent with application number CN202420979793.5. This type of expansion joint has a simple structure and strong applicability. It is widely used in small and medium-sized bridges. However, due to the existence of the through joint, noise will be generated when the vehicle passes through the expansion joint. The noise decibel can reach 80-100db. It is the largest source of noise on the road except for the vehicle breaking wind noise and engine roar. When the vehicle passes, it will jump and impact, affecting driving comfort. In addition, the through joint is also easy to be mixed with stones, sand, leaves and other debris, affecting the normal expansion and contraction of the expansion joint. When the through joint is blocked and filled with debris, when the expansion joint is squeezed, downward pressure will be generated, causing the rubber strip to break. At the same time, due to the wind, sun and rain, rubber is an easily aged component. Damage and leakage are common, which seriously affects the beauty of the bridge, the durability of the beam body and the safety of the main structure of the bridge.
[0005] The comb-tooth expansion joint is composed of comb-tooth steel plates, stainless steel slide plates, neoprene plates, anchor bolts, etc., and the purpose of deformation is achieved through the staggered tooth-slit steel plates, such as the Chinese utility model patent with application number CN201921179504.9. Compared with the steel expansion joint, this type of expansion joint avoids the full-length gap, which improves the driving comfort to a certain extent. However, due to the comb-tooth structure of the comb-tooth expansion joint, it is easy to be stuck by sand, gravel, leaves and other debris in daily use, which affects the normal expansion and contraction function of the expansion joint and even causes damage to the expansion joint. Once the debris enters the comb-tooth plate expansion joint, it is difficult to clean up, and special tools are needed to clean it up, which consumes time and manpower. Summary of the invention
[0006] The object of the present invention is to provide an expansion joint to meet the longitudinal expansion and displacement requirements of the beam body while solving the problems of poor driving comfort and easy clogging of debris in conventional expansion joints, which affects bridge safety.
[0007] In order to achieve the above object, the technical solution proposed by the present invention is: A expansion joint, comprising: two fixed joint assemblies, a movable joint assembly, a wheel set and a traction member. The two fixed joint assemblies extend transversely along the bridge and are arranged at intervals in the longitudinal direction of the bridge. The movable joint assembly is arranged between the two fixed joint assemblies, and the movable joint assembly comprises at least one movable joint plate, the movable joint plate extends transversely along the bridge and has a first end and a second end opposite to each other in the transverse direction of the bridge, and the width of the movable joint plate gradually increases from the first end to the second end. When two or more movable joint plates are provided, each movable joint plate is arranged in sequence in the longitudinal direction of the bridge, and any two adjacent movable joint plates are arranged inversely along the transverse direction of the bridge and the opposite surfaces match each other. The opposite surfaces of the fixed joint assembly and the movable joint plate match each other, and the movable joint plate and the fixed joint assembly are slidably matched through the wheel set, so that the movable joint plate can move relative to the fixed joint assembly in the transverse direction of the bridge. One end of each movable joint plate is connected to a traction member. When the distance between the two fixed joint assemblies increases with the expansion gap of the bridge, the movable joint plate moves laterally from the second end to the first end under the action of the traction member. When the distance between the two fixed joint assemblies decreases with the expansion gap of the bridge, the movable joint plate moves laterally from the first end to the second end.
[0008] Preferably, the wheel group includes: two groups of lateral guide wheel groups and at least one group of supporting roller groups, a group of supporting roller groups is provided at the bottom of each of the movable joint plates, and the two groups of lateral guide wheel groups are respectively provided on both sides of the movable joint assembly.
[0009] Preferably, the support roller group includes two rows of support rollers arranged transversely along the bridge, and the support rollers rotate in a vertical plane; the lateral guide wheel group includes a row of lateral guide wheels arranged transversely along the bridge, and the lateral guide wheels rotate in a horizontal plane.
[0010] Preferably, the fixed seam assembly comprises: a bottom plate, a base and a fixed seam plate, the base is fixed on the bottom plate, the fixed seam plate is connected to the top of the base, and the fixed seam plate is flush with the top surface of the movable seam plate.
[0011] Preferably, the base comprises: two support plates, a plurality of connecting members and a plurality of fasteners; the two support plates are fixed on the base plate at intervals along the longitudinal direction of the bridge; a plurality of connecting members arranged at intervals along the transverse direction of the bridge are fixed between the two support plates; and the fixed seam plate is detachably connected to each connecting member by fasteners.
[0012] Preferably, a first limiting assembly is provided between the fixed seam assembly and the movable seam assembly, and the first limiting assembly includes a limiting groove, a first limiting plate and a second limiting plate. The limiting groove opens upward and is fixed to the bottom plate, and the limiting groove is located on the side of the base close to the movable seam assembly and directly below the fixed seam plate. The bottom of the side where the movable seam plate cooperates with the fixed seam plate is connected with a first limiting plate extending horizontally outward, and the side of the first limiting plate away from the movable seam plate is connected with a second limiting plate extending vertically downward, the first limiting plate is inserted between the fixed seam plate and the limiting groove, and the second limiting plate is inserted into the limiting groove. The lateral guide wheel assembly is installed at the bottom of the fixed seam plate and slidably cooperates with the second limiting plate.
[0013] Preferably, the limiting groove is filled with lubricant.
[0014] Preferably, a second limiting assembly is provided between each of the movable joint plates and the bottom plate, and the second limiting assembly includes a slide groove and a slider that cooperates with the slide groove for sliding and limiting. One of the slide groove and the slider is connected to the movable joint plate, and the other is connected to the bottom plate to limit the vertical movement of the movable joint plate.
[0015] Preferably, lubricant is filled between the opposing surfaces of the fixed joint plate and the movable joint plate and / or between the opposing surfaces of two adjacent movable joint plates.
[0016] Preferably, the horizontal cross-section of the movable seam plate is a trapezoid or a triangle.
[0017] Preferably, the traction member comprises a housing, a rope pulley, a counterweight and a traction rope. The housing is mounted on the bridge, the counterweight is arranged in the housing, the rope pulley is rotatably arranged on the top of the housing, and the counterweight is suspended from the first end of the movable joint plate through the traction rope wound around the rope pulley.
[0018] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the expansion joint of the present invention includes two fixed joint components, a movable joint component, a wheel set and a traction member, the movable joint component includes at least one movable joint plate, the movable joint plate is constructed to have a width gradually increasing from its first end to its second end, and is mutually matched with the opposite surface of the fixed joint component, the first end of the movable joint plate is connected to the traction member, so that the movable joint plate can be laterally displaced through the wheel set as the spacing between the two fixed joint components increases or decreases, thereby flexibly adapting to the longitudinal expansion and contraction changes of the beam body, ensuring that the expansion joint surface is smooth, the gap is small, the driving is comfortable, the noise is low, and it is not easy to be blocked by debris, thereby ensuring driving safety and bridge safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 for Figure 1 This is the installation plan view of the expansion joint of Example 1.
[0020] Figure 2 This is a schematic diagram of a bridge cross section of Example 1.
[0021] Figure 3 for Figure 1 A large sample image of point A in the middle.
[0022] Figure 4 for Figure 3 Middle AA section.
[0023] Figure 5 This is the installation plan view of the expansion joint of Example 2.
[0024] Figure 6 This is a schematic diagram of a bridge cross section of Example 2.
[0025] Figure 7 for Figure 5 Large-scale image of point B in the middle.
[0026] Figure 8 for Figure 7 Middle BB section.
[0027] Among them: 1. Fixed joint assembly; 11. Bottom plate; 12. Base; 121. Support plate; 122. Connector, 123; Fastener; 13. Limiting groove; 14. Fixed joint plate; 2. Moving joint assembly; 21. Moving joint plate; 211. First end; 212. Second end; 22. First limiting plate; 23. Second limiting plate; 3. Support roller; 4. Lateral guide wheel; 5. Traction member; 51. Shell; 52. Pulley; 53. Counterweight; 54. Traction rope; 6. Lubricant; 7. Second limiting assembly; 71. Slide groove; 72. Slider; 8. Beam; 9. Telescopic gap; 10. Anchor bar. DETAILED DESCRIPTION
[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.
[0029] Embodiment 1 Combination Figure 1 to Figure 4 As shown, the expansion joint of this embodiment is installed between two adjacent beam bodies 8, and there is a expansion gap 9 between the two beam bodies 8, and a mounting half groove is provided on the top of one side of the two adjacent beam bodies 8. The expansion joint of this embodiment includes: two fixed joint components 1, a movable joint component 2, a wheel set and a traction member 5. The two fixed joint components 1 extend in the transverse direction of the bridge and are arranged at a relative interval in the longitudinal direction of the bridge. The two fixed joint components 1 are respectively installed in the mounting half grooves of the two beam bodies 8. The movable joint component 2 is arranged between the two fixed joint components 1, and the movable joint component 2 includes a movable joint plate 21, which extends in the transverse direction of the bridge and has a first end 211 and a second end 212 opposite to each other in the transverse direction of the bridge. The width a of the movable joint component 2 gradually increases from the first end 211 to the second end 212. The relative surfaces of the movable joint assembly 2 and the fixed joint assembly 1 fit together, and the movable joint plate 21 and the fixed joint assembly 1 are slidably matched through a wheel set, so that the movable joint plate 21 can move relative to the fixed joint assembly 1 along the horizontal direction of the bridge, and the first end 211 of the movable joint plate 21 is connected to a traction member 5.
[0030] When the spacing between the two fixed joint components 1 increases with the expansion gap 9 of the bridge, the movable joint plate 21 moves laterally from the second end 212 to the first end 211 under the action of the traction member 5. When the spacing between the two fixed joint components 1 decreases with the expansion gap 9 of the bridge, the movable joint plate 21 moves laterally from the first end 211 to the second end 212, so that the bridge deck always remains continuous. The expansion joint of this embodiment adopts a mechanical expansion structure, which has strong bearing capacity, safety and reliability, smooth surface, small gap, and can even be seamless, not easy to be blocked by debris, which is conducive to reducing maintenance workload. While meeting the needs of longitudinal expansion and displacement of the beam body, it better guarantees driving safety, stability and comfort as well as bridge safety.
[0031] Specifically, the fixed joint assembly 1 of this embodiment includes: a bottom plate 11, a base 12 and a fixed joint plate 14. The bottom plate 11 is fixedly connected to the beam body 8 by anchor bars 10 pre-embedded in the beam body 8. The base 12 is fixed on the bottom plate 11. The fixed joint plate 14 is fixed above the base 12. The fixed joint plate 14 is flush with the top surface of the movable joint plate 21.
[0032] In order to facilitate assembly, the base 12 of this embodiment includes two support plates 121, a plurality of connectors 122 and a plurality of fasteners 123. The two support plates 121 are fixed on the bottom plate 11 at intervals along the longitudinal direction of the bridge, and a plurality of connectors 122 arranged at intervals along the transverse direction of the bridge are fixed between the two support plates 121. The fixed joint plate 14 is fixed by connecting with each connector 122 through fasteners 123. The connector 122 is preferably made of angle steel, and the fasteners 123 are preferably made of bolts and nuts. The fixed joint assembly 1 of this embodiment realizes the quick disassembly and assembly of the expansion joint, reduces the impact on traffic, and facilitates subsequent inspection and maintenance.
[0033] A first limiting assembly is provided between the fixed joint assembly 1 and the movable joint assembly 2 of this embodiment, and the first limiting assembly includes a limiting groove 13, a first limiting plate 22 and a second limiting plate 23. The limiting groove 13 is fixed on the bottom plate 11, and is located on the side of the base 12 close to the movable joint assembly 2 and directly below the fixed joint plate 14. Since only one movable joint plate 21 is provided in this embodiment, and the two sides of the movable joint plate 21 are respectively matched with two fixed joint plates 14, the two sides of the bottom of the movable joint plate 21 of this embodiment are respectively connected with the first limiting plates 22 extending horizontally outward, and the side of each first limiting plate 22 away from the movable joint plate 21 is connected with the second limiting plate 23 extending vertically downward. The first limiting plates 22 on both sides of the movable joint plate 21 are respectively inserted horizontally between the corresponding fixed joint plates 14 and the limiting grooves 13 on both sides, and the second limiting plates 23 on both sides are respectively inserted vertically into the corresponding limiting grooves 13. The first limiting plate 22 cooperates with the fixed joint plate 14 to limit the vertical movement of the movable joint assembly 2 to prevent the movable joint plate 21 from being dislocated and tilted. The second limiting plate 23 cooperates with the limiting groove 13 to horizontally limit the movable joint assembly 2 along the longitudinal direction of the bridge to prevent the vertical limiting failure of the movable joint assembly 2, thereby ensuring the effectiveness of the entire expansion joint and the safety of the bridge.
[0034] The limiting groove 13 of this embodiment may also be filled with a lubricant 6 to play a lubricating and sealing role, preferably a lubricating grease such as butter.
[0035] The movable joint plate 21 of this embodiment is a trapezoidal plate or a triangular plate, and its horizontal cross section is a trapezoid or a triangle. It is preferably an isosceles triangular plate or an isosceles trapezoidal plate, so that the two sides of the expansion joint are symmetrical and the force is balanced. The lubricant 6 is filled between the opposite surfaces of the fixed joint plate 14 and the movable joint plate 21. On the one hand, it can reduce the friction resistance and ensure the smooth sliding of the movable joint assembly 2. On the other hand, it plays a role of filling and sealing, improving the dustproof and waterproof performance of the expansion joint and preventing water penetration. The lubricant 6 is preferably grease, such as butter.
[0036] The wheel group of this embodiment includes a group of supporting roller groups and two groups of lateral guide wheel groups. The supporting roller group is installed at the bottom of the movable joint plate 21, and includes two rows of supporting rollers 3 arranged along the transverse direction of the bridge, and the supporting rollers 3 rotate in a vertical plane. A group of lateral guide wheel groups are respectively installed at the bottom of the two fixed joint plates 14, and the lateral guide wheel groups include a row of lateral guide wheels 4 arranged along the transverse direction of the bridge, and the lateral guide wheels 4 rotate in a horizontal plane and slide with the second limit plate 23. In another preferred embodiment of the present invention, the two groups of lateral guide wheel groups are respectively arranged on both sides of the movable joint assembly 2, directly connected to the movable joint assembly 2, and slide with the side wall of the base 12.
[0037] The traction member 5 of this embodiment is used to generate a pulling force from the second end 212 of the movable joint plate 21 to the first end 211, so as to ensure that the movable joint plate 21 and the two fixed joint assemblies 1 always keep in fit. The traction member 5 of this embodiment includes: a housing 51, a rope wheel 52, a counterweight 53 and a traction rope 54. The housing 51 is installed on the bridge, the counterweight 53 is arranged in the housing 51, the rope wheel 52 is rotatably arranged on the top of the housing 51, and the counterweight 53 is suspended from the first end 211 of the movable joint plate 21 by the traction rope 54 wound around the rope wheel 52. The above-mentioned pulling force is generated by the counterweight 53, and the housing 51 is used to protect the counterweight 53 to avoid the risk of falling from a high altitude.
[0038] It can be understood that the expansion joint of this embodiment can also be applied to the expansion gap 9 in other parts of the bridge, such as between the beam 8 and the abutment.
[0039] Embodiment 2 Combination Figures 5 to 8 The structure of this embodiment is similar to that of the first embodiment, and the difference between the two is that two movable joint plates 21 are provided in this embodiment, and the two movable joint plates 21 are arranged in sequence between the two fixed joint assemblies 1 along the longitudinal direction of the bridge, and the two movable joint plates 21 are arranged in a transverse inverted manner.
[0040] Since the movable joint assembly 2 of the present embodiment is equipped with two movable joint plates 21 , and one side of each of the two movable joint plates 21 cooperates with the fixed joint plate 14 , only one side of the movable joint plate 21 of the present embodiment is provided with the first limiting plate 22 and the second limiting plate 23 .
[0041] In order to prevent a single movable joint plate 21 from being dislocated due to force, in this embodiment, a second limiting component 7 is set between each movable joint plate 21 and the bottom plate 11. The second limiting component 7 includes a slide groove 71 and a slider 72 that cooperates with the slide groove 71 for sliding and limiting. One of the slide groove 71 and the slider 72 is connected to the movable joint plate 21, and the other is connected to the bottom plate 11. In addition to being able to limit the vertical movement of the movable joint plate 21, the second limiting component 7 can also limit the horizontal movement of the movable joint plate 21.
[0042] The space between the opposing surfaces of the two moving joint plates 21 is also filled with lubricant 6 .
[0043] The expansion joint of this embodiment is provided with two movable joint plates 21, and the first end 211 of each movable joint plate 21 is connected to a traction member 5. When the spacing between the two fixed joint assemblies 1 increases as the bridge expansion gap 9 increases, the two movable joint plates 21 move away from each other under the action of the traction member 5, and when the spacing between the two fixed joint plates 23 decreases as the bridge expansion gap decreases, the two movable joint assemblies 2 move toward each other to adapt to the expansion and contraction changes of the beam body 8.
[0044] Under the condition that the bridge expansion gap 9 changes consistently, the expansion joint of this embodiment is compared with the first embodiment, and the distance that a single movable joint plate 21 slides along the bridge transversely is shorter, so the length of the movable joint plate 21 extending or retracting is shorter. When making the movable joint plate 21, the length of the two ends of the movable joint plate 21 extending from the fixed joint assembly 1 can be shorter, so it is more beautiful and saves more production costs. At the same time, the time for the two movable joint plates 21 to change to a stable state with the bridge expansion gap 9 is also shorter, and the efficiency is higher.
[0045] In other preferred embodiments of the present invention, the movable joint plate 21 can also be set to be multiple, such as three or four, and any two adjacent movable joint plates 21 are arranged inverted with each other along the transverse direction of the bridge and the opposite surfaces fit together. The configuration of the movable joint plates 21 on both sides is the same as that in the present embodiment, and the movable joint plate 21 in the middle is provided with a supporting roller group and a second limiting assembly 7, and a lubricant 6 is filled between the opposite surfaces of each movable joint plate 21.
[0046] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which are within the scope of protection of the present invention.
Claims
1. An expansion joint, It is characterized in that include: Two fixed joint components (1), a movable joint component (2), a wheel set and a traction member (5); The two fixed joint assemblies (1) extend in the transverse direction of the bridge and are arranged in a relative spacing in the longitudinal direction of the bridge; The movable joint assembly (2) is arranged between the two fixed joint assemblies (1), the movable joint assembly (2) comprises at least one movable joint plate (21), the movable joint plate (21) extends in the transverse direction of the bridge and has a first end (211) and a second end (212) opposite to each other in the transverse direction of the bridge, and the width of the movable joint plate (21) gradually increases from the first end (211) to the second end (212); When two or more movable joint plates (21) are provided, the movable joint plates (21) are arranged in sequence along the longitudinal direction of the bridge, and any two adjacent movable joint plates (21) are arranged inversely to each other along the transverse direction of the bridge, and the opposite surfaces thereof fit each other; The opposite surfaces of the fixed joint assembly (1) and the movable joint plate (21) fit together, and the movable joint plate (21) and the fixed joint assembly (1) are slidably matched via a wheel set, so that the movable joint plate (21) can move relative to the fixed joint assembly (1) in the transverse direction of the bridge; One end of each of the movable seam plates (21) is connected to a traction member (5); When the distance between the two fixed joint assemblies (1) increases as the bridge expansion gap (9) increases, the movable joint plate (21) moves laterally from the second end (212) toward the first end (211) under the action of the traction member (5); When the distance between the two fixed joint assemblies (1) decreases as the bridge expansion gap (9) decreases, the movable joint plate (21) moves laterally from the first end (211) to the second end (212).
2. The expansion joint according to claim 1, It is characterized in that The wheel set comprises: two sets of lateral guide wheel sets and at least one set of supporting roller sets; a set of supporting roller sets is provided at the bottom of each of the movable joint plates (21), and the two sets of lateral guide wheel sets are respectively provided on both sides of the movable joint assembly (2).
3. The expansion joint according to claim 2, It is characterized in that The support roller group comprises two rows of support rollers (3) arranged transversely of the bridge, and the support rollers (3) rotate in a vertical plane; the lateral guide wheel group comprises a row of lateral guide wheels (4) arranged transversely of the bridge, and the lateral guide wheels (4) rotate in a horizontal plane.
4. The expansion joint according to claim 2, It is characterized in that The fixed joint assembly (1) comprises: a bottom plate (11), a base (12) and a fixed joint plate (14); the base (12) is fixed on the bottom plate (11); the fixed joint plate (14) is connected to the top of the base (12); and the fixed joint plate (14) is flush with the top surface of the movable joint plate (21).
5. The expansion joint according to claim 4, It is characterized in that The base (12) comprises: two support plates (121), a plurality of connecting members (122) and a plurality of fasteners (123); the two support plates (121) are fixed on the bottom plate (11) at intervals along the longitudinal direction of the bridge, a plurality of connecting members (122) arranged at intervals along the transverse direction of the bridge are fixed between the two support plates (121), and the fixed joint plate (14) is detachably connected to each connecting member (122) via the fasteners (123).
6. The expansion joint according to claim 4, It is characterized in that A first limiting assembly is provided between the fixed joint assembly (1) and the movable joint assembly (2), and the first limiting assembly comprises: a limiting groove (13), a first limiting plate (22) and a second limiting plate (23); The limiting groove (13) opens upward and is fixed on the bottom plate (11), and the limiting groove (13) is located on a side of the base (12) close to the movable joint assembly (2) and directly below the fixed joint plate (14); A first limiting plate (22) extending horizontally outward is connected to the bottom of one side of the movable joint plate (21) that cooperates with the fixed joint plate (14); a second limiting plate (23) extending vertically downward is connected to the side of the first limiting plate (22) away from the movable joint plate (21); the first limiting plate (22) is inserted between the fixed joint plate (14) and the limiting groove (13); and the second limiting plate (23) is inserted into the limiting groove (13); The lateral guide wheel assembly is mounted on the bottom of the fixed joint plate (14) and is slidably matched with the second limiting plate (23).
7. The expansion joint according to claim 6, It is characterized in that The limiting groove (13) is filled with lubricant (6).
8. The expansion joint according to any one of claims 4 to 7, It is characterized in that A second limiting component (7) is provided between each of the movable joint plates (21) and the bottom plate (11); The second limiting assembly (7) comprises: a slide groove (71) and a slider (72) that cooperates with the slide groove (71) for sliding and limiting. One of the slide groove (71) and the slider (72) is connected to the movable joint plate (21), and the other is connected to the bottom plate (11) to limit the vertical movement of the movable joint plate (21).
9. The expansion joint according to claim 1, It is characterized in that The horizontal cross section of the movable joint plate (21) is a trapezoid or a triangle; Lubricant (6) is filled between the opposing surfaces of the fixed joint plate (14) and the movable joint plate (21) and / or between the opposing surfaces of two adjacent movable joint plates (21).
10. The expansion joint according to claim 1, It is characterized in that The traction member (5) comprises: a housing (51), a rope pulley (52), a counterweight (53) and a traction rope (54); the housing (51) is installed on a bridge, the counterweight (53) is arranged in the housing (51), the rope pulley (52) is rotatably arranged on the top of the housing (51), and the counterweight (53) is suspended from the first end (211) of the movable joint plate (21) through the traction rope (54) wound around the rope pulley (52).