Bridge expansion displacement control component and installation control method thereof

Abstract

The invention belongs to the technical field of bridge construction engineering, and particularly relates to a bridge telescopic displacement control component and an installation control method thereof.The bridge telescopic displacement control component is characterized in that middle profile steel capable of moving relatively is arranged between profile steel A and profile steel B, a rotating shaft is fixedly connected to the bottom face of the middle profile steel, and a rotating piece is connected to the rotating shaft; a set of supporting frames, a traction rope and a connecting plate are arranged below each section steel, the two supporting frames are symmetrically arranged on the front side and the rear side of the rotating shaft, one end of each supporting frame is a fixed connection end, and the other end of each supporting frame is a sliding end; the fixed connection end and the sliding end of each supporting frame are each provided with a connecting plate, and the connecting plate of the fixed connection end of one supporting frame is connected with the connecting plate of the sliding end of the other symmetrical supporting frame through a traction rope wound around the rotating piece. And the middle section steel always slides relative to the parts between the fixed connection ends and the sliding ends of the two support frames. According to the invention, under the condition of no power source, the middle section steel can slide relatively under the action of the traction rope, so that the uniform width of the expansion joint between the section steel is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of highway bridge construction engineering, and particularly relates to a bridge expansion displacement control component and an installation control method thereof. Background Art

[0002] The displacement control component is a component that controls the relatively uniform seam width between different steel shapes of the modular expansion device. At present, the displacement control components mainly include two types: elastic control components and rigid control components. The elastic control components are prone to damage, have high maintenance costs and short service lives; the rigid control components are prone to rust and jamming, the connecting bolts are prone to looseness, and the impact noise is large when vehicles drive on the bridge. The existing displacement control components cannot well control the seam width uniformity between each single module of the modular expansion device.

[0003] Therefore, it is particularly important to develop a displacement control component that can better control the seam width uniformity between each steel shape of the modular expansion device, has no abnormal noise, and has a long service life. Summary of the Invention

[0004] In order to solve the problems of uneven seam width between each steel shape of the existing modular expansion device, abnormal noise of the expansion displacement control component, and short service life, the purpose of the present invention is to provide a bridge expansion displacement control component and an installation control method thereof.

[0005] The purpose of the present invention is achieved by the following technical solutions: The bridge expansion displacement control component of the first structure of the present invention includes steel shape A and steel shape B, and the steel shape A and steel shape B are respectively fixedly connected to the bridges on both sides of the expansion joint; a middle steel shape capable of relatively moving is arranged between the steel shape A and the steel shape B, a rotating shaft is fixedly connected to the bottom surface of the middle steel shape, and two rotating parts arranged up and down are connected to the rotating shaft; a set of support frames, traction ropes and connecting plates are arranged below the steel shape A, the middle steel shape and the steel shape B. The support frames are two symmetrically arranged on the front and rear sides of the rotating shaft. One end of each support frame is a fixed end and the other end is a sliding end. The fixed ends of the two symmetric support frames are located on the left and right sides of the rotating shaft, and the sliding ends of the two symmetric support frames are located on the left and right sides of the rotating shaft. The fixed end of the support frame is used for fixedly connecting to the bottom surface of the steel shape A or the steel shape B, and the sliding end of the support frame can relatively slide with the bottom surface of the steel shape B or the steel shape A; connecting plates are arranged at the fixed end and the sliding end of each support frame. The connecting plate at the fixed end of one support frame is connected to the connecting plate at the sliding end of the other symmetric support frame through a traction rope bypassing one rotating part, and the connecting plate at the sliding end of one support frame is connected to the connecting plate at the fixed end of the other symmetric support frame through a traction rope bypassing the other rotating part; the middle steel shape always relatively slides with the part between the fixed ends and the sliding ends of the two support frames.

[0006] The second - structure bridge expansion displacement control component of the present invention includes steel section A and steel section B. The steel section A and the steel section B are respectively fixedly connected to the bridges on both sides of the expansion joint. A middle steel section capable of relative movement is arranged between the steel section A and the steel section B. Two rotating shafts arranged front - to - back are fixedly connected to the bottom surface of the middle steel section, and a rotating member is connected to each of the rotating shafts. A set of support frames, traction ropes and connecting plates are arranged below the steel section A, the middle steel section and the steel section B. There are two groups of support frames in total, four in number. On the front and rear sides of each rotating shaft, a set of two support frames are symmetrically arranged. One end of the symmetric support frames on the front and rear sides of each rotating shaft is a fixed end, and the other end is a sliding end. The fixed ends of the symmetric support frames on the front and rear sides of each rotating shaft are located on the left and right sides of the rotating shaft, and the sliding ends of the symmetric support frames on the front and rear sides of each rotating shaft are located on the left and right sides of the rotating shaft. The fixed end of the support frame is used for fixedly connecting to the bottom surface of the steel section A or the steel section B, and the sliding end of the support frame can relatively slide with the bottom surface of the steel section B or the steel section A. Connecting plates are arranged at both the fixed end and the sliding end of each support frame. The connecting plate at the fixed end of one support frame is connected to the connecting plate at the sliding end of another symmetric support frame in the same group through a traction rope that bypasses the rotating member. The middle steel section always relatively slides with the part between the fixed ends and the sliding ends of each support frame.

[0007] The third - structure bridge expansion displacement control component of the present invention includes steel section A and steel section B. The steel section A and the steel section B are respectively fixedly connected to the bridges on both sides of the expansion joint. A plurality of middle steel sections capable of relative movement are arranged between the steel section A and the steel section B. A rotating shaft is fixedly connected to the bottom surface of each middle steel section, and two rotating members arranged up - and - down are connected to each rotating shaft. A plurality of sets of support frames, traction ropes and connecting plates with the same structure are arranged below the steel section A, the steel section B and each middle steel section. Starting from the steel section A or the steel section B, every three adjacent steel sections share one set. Each set of support frames consists of two symmetrically arranged on the front and rear sides of the rotating shaft. One end of each support frame is a fixed end, and the other end is a sliding end. The fixed ends of the two symmetric support frames are located on the left and right sides of the rotating shaft, and the sliding ends of the two symmetric support frames are located on the left and right sides of the rotating shaft. The fixed end of the support frame is used for fixedly connecting to the bottom surface of the steel section A, the steel section B or the middle steel section, and the sliding end of the support frame can relatively slide with the bottom surface of the steel section B, the steel section A or the middle steel section. Connecting plates are arranged at both the fixed end and the sliding end of each support frame. The connecting plate at the fixed end of one support frame is connected to the connecting plate at the sliding end of another symmetric support frame through a traction rope that bypasses one rotating member, and the connecting plate at the sliding end of one support frame is connected to the connecting plate at the fixed end of another symmetric support frame through a traction rope that bypasses another rotating member. Each middle steel section always relatively slides with the support frames that are not fixedly connected to it.

[0008] The fourth - structure bridge expansion displacement control component of the present invention includes section steel A and section steel B, and the section steel A and section steel B are respectively fixedly connected to the bridges on both sides of the expansion joint; a plurality of intermediate section steels capable of relative movement are arranged between the section steel A and the section steel B, two rotating shafts are fixedly connected to the bottom surface of each intermediate section steel, and a rotating member is connected to each rotating shaft; a plurality of sets of support frames, traction ropes and connecting plates are arranged below the section steel A, the intermediate section steels and the section steel B. Starting from the section steel A or the section steel B, every three adjacent section steels share one set. Each set of support frames has two groups, a total of four. On the front and rear sides of each rotating shaft, a set of two support frames is symmetrically arranged. One end of the support frames on the front and rear sides of each rotating shaft is a fixed end, and the other end is a sliding end. The fixed ends of the symmetric support frames on the front and rear sides of each rotating shaft are located on the left and right sides of the rotating shaft, and the sliding ends of the symmetric support frames on the front and rear sides of each rotating shaft are located on the left and right sides of the rotating shaft. The fixed end of the support frame is used to be fixedly connected to the bottom surface of the section steel A, the section steel B or the intermediate section steel, and the sliding end of the support frame can relatively slide with the bottom surface of the section steel B, the section steel A or the intermediate section steel; connecting plates are arranged at both the fixed end and the sliding end of each support frame. The connecting plate at the sliding end of one support frame in a group is connected to the connecting plate at the fixed end of the other symmetric support frame in the same group through a traction rope that bypasses the rotating member on one rotating shaft, and the connecting plate at the fixed end of one support frame in the other group is connected to the connecting plate at the sliding end of the other symmetric support frame in the same group through a traction rope that bypasses the rotating member on the other rotating shaft; each intermediate section steel always relatively slides with the support frames not fixedly connected to it.

[0009] Among them: the number of sets of the support frames, the traction ropes and the connecting plates is N, and the widths of N + 1 expansion joints between the section steel A, the section steel B and each intermediate section steel with a total number of N + 2 can be controlled.

[0010] The length direction of the support frame is perpendicular to the length directions of the section steel A, the section steel B and the intermediate section steel.

[0011] The rotating member is a rotating sleeve or a pulley rotatably installed on the rotating shaft. The upper end of the rotating shaft is fixedly connected to the intermediate section steel, and a nut for pressing the rotating sleeve or the pulley is threadedly connected to the lower end of the rotating shaft; a groove is arranged along the circumferential direction on the rotating sleeve.

[0012] An elastic member for increasing the damping effect and adding pre - tension is arranged between the end of the traction rope and the connecting plate.

[0013] One end of the connecting plate is fixedly connected to the bottom surface of the support frame, the other end of the connecting plate is connected to the traction rope, and the length direction of the connecting plate is the same as the length direction of the section steel A, the intermediate section steel or the section steel B.

[0014] The installation control method of the bridge expansion displacement control component of the present invention includes the following steps during installation: Step A: Place an intermediate section steel between the section steels A and B, and determine the number of sets of support frames, traction ropes, and connecting plates according to the number of the intermediate section steels. Step B: Arrange the support frames perpendicular to the section steels A, B, and the intermediate section steel, and fixedly connect the fixed ends of the support frames to the section steels A, B, or the intermediate section steel. Step C: Fix connecting plates to the lower surfaces of the fixed ends and the sliding ends of the support frames respectively. Step D: Arrange a rotating shaft between two symmetric support frames, and fix the rotating shaft to the intermediate section steel. Step E: Install rotating parts on the rotating shaft. Step F: Pass the traction rope around the rotating parts, and fixedly connect the two ends of the traction rope to the connecting plates on the same side of two symmetric support frames respectively. Step G: After the bridge expansion joint displacement control component is assembled, position the section steels A and B on the bridges on both sides of the expansion joint respectively and fix them. After installation, when the width of the expansion joint between the single modules of the modular expansion device changes, the sliding ends of the support frames slide relative to the section steels A, B, or the intermediate section steel, and the intermediate section steel between the section steels A and B slides left and right on the support frames under the action of the traction rope, so that the widths of the expansion joints between the section steel A and the intermediate section steel, between the section steel B and the intermediate section steel, and between adjacent intermediate section steels are evenly equal.

[0015] The advantages and positive effects of the present invention are as follows: 1. The bridge expansion joint displacement control component of the present invention can, without a power source, make the intermediate section steel slide relative to each other through the action of the traction ropes with fixed lengths, so as to ensure that the widths of the expansion joints between the section steels are uniform.

[0016] 2. The bridge expansion joint displacement control component of the present invention adds elastic parts at the ends of the traction ropes, or adjusts the material of the traction ropes to increase the damping effect, preventing the widths of the expansion joints between the single modules of the expansion device from changing sharply when driving or braking, and minimizing the noise to the greatest extent; or adding pre-tightening to provide sufficient pre-tightening force. Brief Description of the Drawings

[0017] Figure 1 It is the structural bottom view of the first embodiment of the bridge expansion joint displacement control component of the present invention; Figure 2 It is Figure 1 the A - A cross-sectional view in Figure 3 It is the structural bottom view of the second embodiment of the bridge expansion joint displacement control component of the present invention; Figure 4 It is Figure 3The sectional view taken along line B-B therein; Figure 5 It is the bottom view of the structure of the third embodiment of the bridge expansion displacement control component of the present invention; Figure 6 It is Figure 5 The sectional view taken along line C-C therein; Figure 7 It is the bottom view of the structure of the fourth embodiment of the bridge expansion displacement control component of the present invention; Figure 8 It is Figure 7 The sectional view taken along line D-D therein; Figure 9 It is Figure 7 The sectional view taken along line E-E therein; Figure 10 It is the bottom view of the structure of the fifth embodiment of the bridge expansion displacement control component of the present invention; Figure 11 It is Figure 10 The sectional view taken along line F-F therein; Figure 12 It is Figure 10 The sectional view taken along line G-G therein; Figure 13 It is Figure 10 The sectional view taken along line H-H therein; Figure 14 It is the bottom view of the structure of the sixth embodiment of the bridge expansion displacement control component of the present invention; Figure 15 It is the bottom view of the structure of the seventh embodiment of the bridge expansion displacement control component of the present invention; Figure 16 It is Figure 15 The enlarged partial view at position I in Figure 17 It is the sectional view of the structure of the bridge expansion displacement control component of the first embodiment of the present invention installed on the bridge; Figure 18 It is the working state diagram of the bridge expansion displacement control component when the width of the expansion joint of the first embodiment of the present invention becomes larger; Figure 19 It is the working state diagram of the bridge expansion displacement control component when the width of the expansion joint of the first embodiment of the present invention becomes smaller; Wherein: 1 is section steel A, 2 is a rotating member, 3 is a rotating shaft, 4 is a support frame, 5 is a towing rope, 6 is a connecting plate, 7 is a nut, 8 is intermediate section steel, 9 is section steel B, 10 is a disc spring, 11 is a beam body, and 12 is steel fiber concrete. Specific embodiments

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Embodiment 1

[0020] AsFigure 1 , Figure 2 As shown in Figure 2 , the bridge expansion displacement control component of this embodiment includes section steel A1 and section steel B9. Section steel A1 and section steel B9 are respectively fixedly connected to the steel fiber concrete 12 on the beam bodies 11 on both sides of the expansion joint. There is an intermediate section steel 8 that can move relatively between section steel A1 and section steel B9. A rotating shaft 3 is fixedly connected to the bottom surface of the intermediate section steel 8, and two rotating members are connected to the rotating shaft 3 and arranged vertically. A set of support frames 4, traction ropes 5, and connecting plates 6 are provided below section steel A1, intermediate section steel 8, and section steel B9. The support frames 4 are two symmetrically arranged on the front and rear sides of the rotating shaft 3. One end of each support frame 4 is a fixed end, and the other end is a sliding end. The fixed ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed end of the support frame 4 is used to be fixedly connected to the bottom surface of section steel A1 or section steel B9, and the sliding end of the support frame 4 can slide relatively with the bottom surface of section steel B9 or section steel A1. Connecting plates 6 are provided at both the fixed end and the sliding end of each support frame 4. The connecting plate 6 at the fixed end of one support frame 4 is connected to the connecting plate 6 at the sliding end of the symmetric other support frame 4 through a traction rope 5 that bypasses a rotating member. The connecting plate 6 at the sliding end of one support frame 4 is connected to the connecting plate 6 at the fixed end of the symmetric other support frame 4 through a traction rope 5 that bypasses another rotating member. The intermediate section steel 8 always slides relatively with the part between the fixed ends and the sliding ends of the two support frames 4.

[0021] The section steel A1, intermediate section steel 8, and section steel B9 of this embodiment can be various section steels used for modular expansion devices. Section steel A1, intermediate section steel 8, and section steel B9 are horizontally arranged and parallel to each other.

[0022] The support frame 4 of this embodiment is rectangular. The length direction of the support frame 4 is perpendicular to the length directions of section steel A1, section steel B9, and intermediate section steel 8. The two support frames 4 are arranged in parallel. The support frame 4 of this embodiment can be made of steel plates, or processed from angle steels and channel steels, as long as it is ensured that the support frame 4 does not interfere with other components.

[0023] One end of the connecting plate 6 of this embodiment is fixedly connected to the bottom surface of the support frame 4, and the other end of the connecting plate 6 is connected to the traction rope 5. The length direction of the connecting plate 6 is the same as the length direction of section steel A1, intermediate section steel 8, or section steel B9.

[0024] The rotating member is a rotating sleeve 2 or a pulley rotatably mounted on the rotating shaft 3, which can rotate around the rotating shaft and fix the traction rope 5; the upper end of the rotating shaft 3 is fixedly connected to the intermediate section steel 8, and a nut 7 for pressing the rotating sleeve 2 or the pulley is threadedly connected to the lower end of the rotating shaft 3. In this embodiment, the rotating member is the rotating sleeve 2, and the rotating sleeve 2 is assembled with the rotating shaft 3. The rotating sleeve 2 can rotate around the rotating shaft 3, and the rotating sleeve 2 can be a pipe fitting with grooves machined on the surface along the circumferential direction.

[0025] In this embodiment, the fixing method of the traction rope 5 and the connecting plate 6 can adopt bundling, welding or bolting.

[0026] An elastic member is added to the end of the traction rope 5 in this embodiment, or the material of the traction rope 5 can be adjusted to increase the damping effect or provide a pre-tightening force; the material of the traction rope 5 can be a stainless steel wire rope or the wire is treated with zinc infiltration, or the material of the traction rope 5 can be adjusted to other non-metallic materials (such as polyurethane) or metal materials with better tensile properties (such as low-carbon steel with a carbon content of 0.10-0.17), which can effectively ensure the service life of the bridge expansion displacement control component.

[0027] Embodiment 2

[0028] As Figure 3 、 Figure 4 shown, the difference between this embodiment and Embodiment 1 is that two rotating shafts 3 arranged front and back are fixedly connected to the bottom surface of the intermediate section steel 8 in this embodiment, and a rotating member is connected to each rotating shaft 3. A set of support frames 4, a traction rope 5 and a connecting plate 6 are provided below the section steel A1, the intermediate section steel 8 and the section steel B9. The support frames 4 are two groups in total, four in number. A set of two support frames 4 is symmetrically arranged on the front and back sides of each rotating shaft 3. One end of the symmetric support frames 4 on the front and back sides of each rotating shaft 3 is a fixed end, and the other end is a sliding end. The fixed ends of the symmetric support frames 4 on the front and back sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the symmetric support frames 4 on the front and back sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 are used to be fixedly connected to the bottom surface of the section steel A1 or the section steel B9, and the sliding ends of the support frames 4 can slide relative to the bottom surface of the section steel B9 or the section steel A1. Connecting plates 6 are provided at the fixed ends and the sliding ends of each support frame 4. The connecting plate 6 at the fixed end of one support frame 4 is connected to the connecting plate 6 at the sliding end of the other symmetric support frame 4 in the same group through a traction rope 5 that bypasses the rotating member. The intermediate section steel 8 always slides relative to the part between the fixed ends and the sliding ends of each support frame 4.

[0029] The rest are the same as those in Embodiment 1.

[0030] Embodiment 3

[0031] As Figure 5, Figure 6 As shown, the difference between this embodiment and the first embodiment is that there are two intermediate steel profiles 8 capable of relative movement between the steel profile A1 and the steel profile B9 in this embodiment. A rotating shaft 3 is fixedly connected to the bottom surface of each intermediate steel profile 8, and two rotating members arranged up and down are connected to each rotating shaft 3. There are two sets of support frames 4, traction ropes 5 and connecting plates 6 with the same structure below the steel profile A1, the steel profile B9 and each intermediate steel profile 8, and every three adjacent steel profiles share one set starting from the steel profile A1 or the steel profile B9; that is, the steel profile A1 and the two intermediate steel profiles 8 share one set to control the gap width between the steel profile A1 and the first intermediate steel profile 8 and the gap width between the two intermediate steel profiles 8, and the two intermediate steel profiles 8 and the steel profile B9 share another set to control the gap width between the two intermediate steel profiles 8 and the gap width between the second intermediate steel profile 8 and the steel profile B9. Each set of support frames 4 are two symmetrically arranged on the front and rear sides of the rotating shaft 3. One end of each support frame 4 is a fixed end and the other end is a sliding end. The fixed ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3, that is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 shared by the steel profile A1 and the two intermediate steel profiles 8 are used to be fixedly connected to the bottom surfaces of the steel profile A1 and the second intermediate steel profile 8, and the sliding ends of the support frames 4 shared by the steel profile A1 and the two intermediate steel profiles 8 can slide relative to the bottom surfaces of the steel profile A1 and the second intermediate steel profile 8. The fixed ends of the support frames 4 shared by the two intermediate steel profiles 8 and the steel profile B9 are used to be fixedly connected to the bottom surfaces of the steel profile B9 and the first intermediate steel profile 8, and the sliding ends of the support frames 4 shared by the two intermediate steel profiles 8 and the steel profile B9 can slide relative to the bottom surfaces of the steel profile B9 and the first intermediate steel profile 8. Connecting plates 6 are provided on the lower surfaces of the fixed ends and the sliding ends of each support frame 4. The connecting plate 6 of the fixed end of one support frame 4 is connected to the connecting plate 6 of the sliding end of the other symmetric support frame 4 through a traction rope 5 bypassing one rotating member, and the connecting plate 6 of the sliding end of one support frame 4 is connected to the connecting plate 6 of the fixed end of the other symmetric support frame 4 through a traction rope 5 bypassing another rotating member. Each intermediate steel profile 8 always slides relative to the support frame 4 not fixedly connected to it.

[0032] The rest are the same as those in the first embodiment.

[0033] Embodiment Four

[0034] As Figures 7 - 9As shown in the figure, the difference between this embodiment and Embodiment 3 is that in the two intermediate steel profiles 8 of this embodiment, two rotating shafts 3 arranged front and back are fixedly connected to the bottom surface of each intermediate steel profile 8, and a rotating member is connected to each rotating shaft 3. Two sets of support frames 4, traction ropes 5 and connecting plates 6 are provided below the steel profile A1, the steel profile B9 and each intermediate steel profile 8, and every three adjacent steel profiles share one set starting from the steel profile A1 or the steel profile B9; that is, the steel profile A1 and the two intermediate steel profiles 8 share one set to control the gap width between the steel profile A1 and the first intermediate steel profile 8 and the gap width between the two intermediate steel profiles 8, and the two intermediate steel profiles 8 and the steel profile B9 share another set to control the gap width between the two intermediate steel profiles 8 and the gap width between the second intermediate steel profile 8 and the steel profile B9.

[0035] For the set shared by the steel profile A1 and the two intermediate steel profiles 8, there are two groups of support frames 4 in total, with four in each group. One set of two support frames 4 is symmetrically arranged on the front and back sides of each rotating shaft 3. One end of the support frames 4 on the front and back sides of each rotating shaft 3 is a fixed end, and the other end is a sliding end. The fixed ends of the symmetric support frames 4 on the front and back sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the symmetric support frames 4 on the front and back sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 shared by the steel profile A1 and the two intermediate steel profiles 8 are used to be fixedly connected to the bottom surfaces of the steel profile A1 and the second intermediate steel profile 8, and the sliding ends of the support frames 4 shared by the steel profile A1 and the two intermediate steel profiles 8 can slide relative to the bottom surfaces of the steel profile A1 and the second intermediate steel profile 8. Connecting plates 6 are provided on the lower surfaces of the fixed ends and the sliding ends of each support frame 4. The connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the second intermediate steel profile 8 at the fixed end is connected to the connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the steel profile A1 at the fixed end through a traction rope 5 that bypasses the rotating member on one rotating shaft 3. The connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the second intermediate steel profile 8 at the fixed end is connected to the connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the steel profile A1 at the fixed end through a traction rope 5 that bypasses the rotating member on the other rotating shaft 3.

[0036] Another set shared by two intermediate steel profiles 8 and steel profile B9, there are two groups of four support frames 4. On the front and back sides of each rotating shaft 3, a set of two support frames 4 are symmetrically arranged. One end of the support frames 4 on the front and back sides of each rotating shaft 3 is a fixed end, and the other end is a sliding end. The fixed ends of the support frames 4 on the front and back sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the support frames 4 on the front and back sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 of another set shared by two intermediate steel profiles 8 and steel profile B9 are used to be fixedly connected to the bottom surfaces of steel profile B9 and the first intermediate steel profile 8. The sliding ends of the support frames 4 of another set shared by two intermediate steel profiles 8 and steel profile B9 can slide relative to the bottom surfaces of steel profile B9 and the first intermediate steel profile 8. On the lower surfaces of the fixed ends and sliding ends of each support frame 4, connecting plates 6 are provided. The connecting plate 6 on the lower surface of the sliding end of the support frame 4 of steel profile B9 at the fixed end is connected to the connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the first intermediate steel profile 8 at the fixed end through a traction rope 5 that bypasses a rotating part on a rotating shaft 3. The connecting plate on the lower surface of the fixed end of the support frame 4 of steel profile B9 at the fixed end is connected to the connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the first intermediate steel profile 8 at the fixed end through a traction rope 5 that bypasses a rotating part on another rotating shaft 3.

[0037] Each intermediate steel profile 8 always slides relative to the support frame 4 that is not fixedly connected to it.

[0038] The rest are the same as in Embodiment 3.

[0039] Embodiment 5

[0040] As Figures 10 - 13 shown, the difference between this embodiment and Embodiment 3 is that there are three intermediate steel profiles 8 that can move relative to each other between steel profile A1 and steel profile B9 in this embodiment. A rotating shaft 3 is fixedly connected to the bottom surface of each intermediate steel profile 8, and two rotating parts are connected up and down on each rotating shaft 3. Below steel profile A1, steel profile B9 and each intermediate steel profile 8, there are three sets of support frames 4, traction ropes 5 and connecting plates 6 with the same structure, starting from steel profile A1 or steel profile B9, every three adjacent steel profiles share one set; that is, steel profile A1 and the first and second intermediate steel profiles 8 share the first set to control the gap width between steel profile A1 and the first intermediate steel profile 8 and the gap width between the first and second intermediate steel profiles 8. The three intermediate steel profiles 8 share the second set to control the gap width between the three intermediate steel profiles 8. The second and third intermediate steel profiles 8 and steel profile B9 share the third set to control the gap width between the second and third intermediate steel profiles 8 and the gap width between the third intermediate steel profile 8 and steel profile B9.

[0041] The first set shared by the profiled steel A1 and the first and second intermediate profiled steels 8, the support frames 4 are two symmetrically arranged on the front and rear sides of the rotating shaft 3. One end of each support frame 4 is a fixed end and the other end is a sliding end. The fixed ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 of the first set shared by the profiled steel A1 and the first and second intermediate profiled steels 8 are used to be fixedly connected to the bottom surfaces of the profiled steel A1 and the second intermediate profiled steel 8. The sliding ends of the support frames 4 of the first set shared by the profiled steel A1 and the first and second intermediate profiled steels 8 can slide relative to the bottom surfaces of the profiled steel A1 and the second intermediate profiled steel 8. The lower surfaces of the fixed ends and the sliding ends of each support frame 4 are both provided with connecting plates 6. The connecting plate 6 of the fixed end of one support frame 4 is connected to the connecting plate 6 of the sliding end of the other symmetric support frame 4 through a traction rope 5 bypassing a rotating member. The connecting plate 6 of the sliding end of one support frame 4 is connected to the connecting plate 6 of the fixed end of the other symmetric support frame 4 through a traction rope 5 bypassing another rotating member.

[0042] The second set shared by the three intermediate profiled steels 8, the support frames 4 are two symmetrically arranged on the front and rear sides of the rotating shaft 3. One end of each support frame 4 is a fixed end and the other end is a sliding end. The fixed ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 of the second set shared by the three intermediate profiled steels 8 are used to be fixedly connected to the bottom surfaces of the first intermediate profiled steel 8 and the third intermediate profiled steel 8. The sliding ends of the support frames 4 of the second set shared by the three intermediate profiled steels 8 can slide relative to the bottom surfaces of the first intermediate profiled steel 8 and the third intermediate profiled steel 8. The lower surfaces of the fixed ends and the sliding ends of each support frame 4 are both provided with connecting plates 6. The connecting plate 6 of the fixed end of one support frame 4 is connected to the connecting plate 6 of the sliding end of the other symmetric support frame 4 through a traction rope 5 bypassing a rotating member. The connecting plate 6 of the sliding end of one support frame 4 is connected to the connecting plate 6 of the fixed end of the other symmetric support frame 4 through a traction rope 5 bypassing another rotating member.

[0043] Second, for the third set shared by the middle steel profiles 8 and the steel profile B9, there are two support frames 4 symmetrically arranged on the front and rear sides of the rotating shaft 3. One end of each support frame 4 is a fixed end and the other end is a sliding end. The fixed ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetric support frames 4 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 of the second and third middle steel profiles 8 sharing the third set with the steel profile B9 are used to be fixedly connected to the bottom surfaces of the steel profile B9 and the second middle steel profile 8. The sliding ends of the support frames 4 of the second and third middle steel profiles 8 sharing the third set with the steel profile B9 can slide relative to the bottom surfaces of the steel profile B9 and the second middle steel profile 8. Connecting plates 6 are provided on the lower surfaces of the fixed ends and sliding ends of each support frame 4. The connecting plate 6 of the fixed end of one support frame 4 is connected to the connecting plate 6 of the sliding end of the other symmetric support frame 4 through a traction rope 5 bypassing a rotating member. The connecting plate 6 of the sliding end of one support frame 4 is connected to the connecting plate 6 of the fixed end of the other symmetric support frame 4 through a traction rope 5 bypassing another rotating member.

[0044] Each middle steel profile 8 always slides relative to the support frame 4 not fixedly connected thereto.

[0045] The rest are the same as in Embodiment 3.

[0046] Embodiment 6

[0047] As Figure 14 shown, the difference between this embodiment and Embodiment 4 is that there are three relatively movable middle steel profiles 8 between the steel profile A1 and the steel profile B9 in this embodiment. Two rotating shafts 3 arranged front and rear are fixedly connected to the bottom surface of each middle steel profile 8, and a rotating member is connected to each rotating shaft 3. There are three sets of support frames 4, traction ropes 5 and connecting plates 6 with the same structure below the steel profile A1, the steel profile B9 and each middle steel profile 8, and every three adjacent steel profiles share one set starting from the steel profile A1 or the steel profile B9; that is, the steel profile A1 shares the first set with the first and second middle steel profiles 8 to control the gap width between the steel profile A1 and the first middle steel profile 8 and the gap width between the first and second middle steel profiles 8. The three middle steel profiles 8 share the second set to control the gap width between the three middle steel profiles 8. The second and third middle steel profiles 8 share the third set with the steel profile B9 to control the gap width between the second and third middle steel profiles 8 and the gap width between the third middle steel profile 8 and the steel profile B9.

[0048] The first set shared by the profiled steel A1 and the first and second intermediate profiled steels 8, with two groups of four support frames 4. On both the front and rear sides of each rotating shaft 3, a pair of two support frames 4 are symmetrically arranged. One end of the support frames 4 on both the front and rear sides of each rotating shaft 3 is a fixed end, and the other end is a sliding end. The fixed ends of the support frames 4 on both the front and rear sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the support frames 4 on both the front and rear sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 of the first set shared by the profiled steel A1 and the first and second intermediate profiled steels 8 are used to be fixedly connected to the bottom surfaces of the profiled steel A1 and the second intermediate profiled steel 8. The sliding ends of the support frames 4 of the first set shared by the profiled steel A1 and the first and second intermediate profiled steels 8 can relatively slide with the bottom surfaces of the profiled steel A1 and the second intermediate profiled steel 8. On the lower surfaces of both the fixed ends and the sliding ends of each support frame 4, connecting plates 6 are provided. The connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the second intermediate profiled steel 8 at the fixed end is connected to the connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the profiled steel A1 by a towing rope 5 that bypasses a rotating part on one rotating shaft 3. The connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the second intermediate profiled steel 8 at the fixed end is connected to the connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the profiled steel A1 by a towing rope 5 that bypasses a rotating part on the other rotating shaft 3.

[0049] The second set shared by the three intermediate profiled steels 8, with two groups of four support frames 4. On both the front and rear sides of each rotating shaft 3, a pair of two support frames 4 are symmetrically arranged. One end of the support frames 4 on both the front and rear sides of each rotating shaft 3 is a fixed end, and the other end is a sliding end. The fixed ends of the support frames 4 on both the front and rear sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the support frames 4 on both the front and rear sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 of the second set shared by the three intermediate profiled steels 8 are used to be fixedly connected to the bottom surfaces of the first intermediate profiled steel 8 and the third intermediate profiled steel 8. The sliding ends of the support frames 4 of the second set shared by the three intermediate profiled steels 8 can relatively slide with the bottom surfaces of the first intermediate profiled steel 8 and the third intermediate profiled steel 8. On the lower surfaces of both the fixed ends and the sliding ends of each support frame 4, connecting plates 6 are provided. The connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the third intermediate profiled steel 8 at the fixed end is connected to the connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the first intermediate profiled steel 8 by a towing rope 5 that bypasses a rotating part on one rotating shaft 3. The connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the third intermediate profiled steel 8 at the fixed end is connected to the connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the first intermediate profiled steel 8 by a towing rope 5 that bypasses a rotating part on the other rotating shaft 3.

[0050] Second and third sets shared by the intermediate profiled steels 8 and the profiled steel B9. There are two groups of four support frames 4. On the front and rear sides of each rotating shaft 3, a set of two support frames 4 are symmetrically arranged. One end of the support frames 4 on the front and rear sides of each rotating shaft 3 is a fixed end, and the other end is a sliding end. The fixed ends of the support frames 4 on the front and rear sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the support frames 4 on the front and rear sides of each rotating shaft 3 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetric support frames 4 are arranged in a diagonal line, and the sliding ends of the two symmetric support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 of the second and third sets shared by the intermediate profiled steels 8 and the profiled steel B9 are used to be fixedly connected to the bottom surfaces of the second intermediate profiled steel 8 and the profiled steel B9. The sliding ends of the support frames 4 of the second and third sets shared by the intermediate profiled steels 8 and the profiled steel B9 can slide relative to the bottom surfaces of the second intermediate profiled steel 8 and the profiled steel B9. On the lower surfaces of the fixed ends and the sliding ends of each support frame 4, connecting plates 6 are provided. The connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the profiled steel B9 at the fixed end is connected to the connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the second intermediate profiled steel 8 by a traction rope 5 that bypasses a rotating part on one rotating shaft 3. The connecting plate 6 on the lower surface of the fixed end of the support frame 4 of the profiled steel B9 at the fixed end is connected to the connecting plate 6 on the lower surface of the sliding end of the support frame 4 of the second intermediate profiled steel 8 by a traction rope 5 that bypasses a rotating part on another rotating shaft 3.

[0051] Each intermediate profiled steel 8 always slides relative to the support frame 4 that is not fixedly connected to it.

[0052] The rest are the same as in Embodiment Four.

[0053] Embodiment Seven

[0054] As Figure 15 、 Figure 16 shown, the difference between this embodiment and Embodiment One is that in this embodiment, an elastic member is added between the end of the traction rope 5 and the connecting plate 6. The elastic member can be a disc spring. The disc spring has a damping effect, which can prevent the rapid change of the gap width between the single modules of the telescopic device during driving or braking, and can also minimize the noise to the greatest extent. Moreover, the disc spring can also add pre-tightening, which can not only eliminate the rigid gap when assembling the traction rope 5, but also compensate for the wear of the bridge expansion displacement control components during operation and provide sufficient pre-tightening force.

[0055] The rest are the same as in Embodiment One.

[0056] As can be seen from Embodiments 1 to 7, a set of support frames 4, traction ropes 5 and connecting plates 6 can control the uniformity of the two seam widths between three steel profiles. When the displacement of the bridge expansion joint is large, the number of intermediate steel profiles 8 increases accordingly, and correspondingly, more sets of support frames 4, traction ropes 5 and connecting plates 6 need to be added. The number of sets of support frames 4, traction ropes 5 and connecting plates 6 is N, which can control the widths of N + 1 expansion joints between the steel profiles A1, steel profile B9 and each intermediate steel profile 8 with a total number of N + 2. For example, two sets of support frames 4, traction ropes 5 and connecting plates 6 can ensure the uniformity of the three gaps of four steel profiles, and so on. N sets of support frames 4, traction ropes 5 and connecting plates 6 can ensure the uniformity of the N + 1 seam widths corresponding to N + 2 steel profiles. Therefore, the expansion displacement control component of the present invention can be applied to expansion devices with large displacement amounts.

[0057] In addition, the present invention can satisfy the control of the seam widths of each steel profile of the modular expansion device while also adapting to the displacement and rotation angles in the vertical, horizontal and longitudinal directions of the expansion device.

[0058] When the beam seam changes due to factors such as temperature, load, concrete shrinkage and creep of the bridge, the seam width of the steel profile also changes accordingly. Since the length of the traction rope 5 is fixed, the bridge expansion displacement control component of the present invention can ensure the uniformity of the seam widths between the steel profiles. The installation includes the following steps: Step A: Place the intermediate steel profile 8 between the steel profiles A1 and steel profile B9, and determine the number of sets of support frames 4, traction ropes 5 and connecting plates 6 according to the number of intermediate steel profiles 8; Step B: Arrange the support frames 4 perpendicular to the steel profiles A1, steel profile B9 and the intermediate steel profile 8, and fix the two fixed ends of the two symmetrical support frames 4 located on the diagonal to the steel profiles A1, steel profile B9 or the intermediate steel profile 8. The two sliding ends of the two symmetrical support frames 4 located on the diagonal are movable ends; Step C: Fix the connecting plates 6 on the lower surfaces of the fixed ends and the sliding ends of the support frames 4 respectively; Step D: Arrange a rotating shaft 3 between the two symmetrical support frames 4 and fix the rotating shaft 3 to the bottom surface of the intermediate steel profile 8; Step E: Install a rotating member on the rotating shaft 3; Step F: Pass the traction rope 5 around the rotating member, and fix the two ends of the traction rope 5 to the connecting plates 6 on the same side of the two symmetrical support frames 4 respectively; Step G: Install the bridge expansion displacement control component, position the steel profiles A1 and steel profile B9 on the steel fiber concrete 12 of the beam bodies 11 on both sides of the expansion joint respectively and fix them, as Figure 17 shown; After the installation is completed, when the seam width between each single module of the modular expansion device changes (such as Figure 18 , Figure 19As shown in the figure, the sliding end of the support frame 4 slides relative to the section steel A1, section steel B9 or the intermediate section steel 8. The intermediate section steel 8 located between the section steel A1 and the section steel B9 slides left and right on the support frame 4 under the action of the traction rope 5, so that the seam widths between the section steel A1 and the intermediate section steel 8, between the section steel B9 and the intermediate section steel 8, and between adjacent intermediate section steels 8 are evenly equal.

[0059] Taking Embodiment 1 as an example, there are three section steels in total (section steel A1, intermediate section steel 8, section steel B9), and the installation steps are as follows: Step A: Two support frames 4 are respectively arranged perpendicular to the section steels A1 and B9 on the left and right sides, and are fixedly and firmly fixed to the section steels A1 and B9 on the left and right sides diagonally, and the other two diagonals are movable ends. Step B: Fix the four connecting plates 6 to the fixed ends and sliding ends of the two support frames 4 respectively. Step C: Arrange the rotating shaft 3 at the bottom surface of the intermediate section steel 8 and in the middle of the two support frames 4, and fix it firmly to the bottom surface of the intermediate section steel 8. Step D: Install the first rotating sleeve 2 and the first traction rope 5. The first traction rope 5 bypasses the first rotating sleeve 2, and both ends of the first traction rope 5 are fixed to the connecting plates 6 on one side of the two support frames 4. Step E: Install the second rotating sleeve 2 and the second traction rope 5. The second traction rope 5 bypasses the second rotating sleeve 2, and both ends of the second traction rope 5 are fixed to the connecting plates 6 on the other side of the two support frames 4. The directions of the two traction ropes 5 are opposite, and the nuts 7 are tightened to press the two rotating sleeves 2. Step F: Position and fix the section steels A1 and B9 in the bridge expansion displacement control component after assembly on the steel fiber concrete 12 of the beam bodies 11 on both sides of the expansion joint respectively.

[0060] When the number of intermediate section steels 8 increases, more sets of support frames 4, traction ropes 5 and connecting plates 6 are required. And so on, for each additional intermediate section steel 8, one set of support frame 4, traction rope 5 and connecting plate 6 is added, and the implementation method is the same.

Claims

1. A bridge expansion displacement control component, comprising steel section A (1) and steel section B (9), wherein the steel section A (1) and the steel section B (9) are respectively fixedly connected to the bridges on both sides of the expansion joint; characterized in that: A middle section steel (8) capable of relative movement is provided between the section steel A (1) and the section steel B (9). A rotating shaft (3) is fixedly connected to the bottom surface of the middle section steel (8), and two rotating members are connected to the rotating shaft (3) and arranged one above the other. A set of support frames (4), traction ropes (5) and connecting plates (6) are provided below the section steel A (1), the middle section steel (8) and the section steel B (9). The support frames (4) are two symmetrically arranged on the front and rear sides of the rotating shaft (3). One end of each support frame (4) is a fixed end and the other end is a sliding end. The fixed ends of the two symmetric support frames (4) are located on the left and right sides of the rotating shaft (3), and the sliding ends of the two symmetric support frames (4) are located on the left and right sides of the rotating shaft (3). The fixed ends of the support frames (4) are used for fixedly connecting to the bottom surface of the section steel A (1) or the section steel B (9), and the sliding ends of the support frames (4) can relatively slide with the bottom surface of the section steel B (9) or the section steel A (1). Connecting plates (6) are provided at both the fixed ends and the sliding ends of each support frame (4). The connecting plate (6) at the fixed end of one support frame (4) is connected to the connecting plate (6) at the sliding end of the other symmetric support frame (4) through a traction rope (5) bypassing one rotating member. The connecting plate (6) at the sliding end of one support frame (4) is connected to the connecting plate (6) at the fixed end of the other symmetric support frame (4) through a traction rope (5) bypassing the other rotating member. The middle section steel (8) always relatively slides with the part between the fixed ends and the sliding ends of the two support frames (4).

2. A bridge expansion displacement control component, comprising section steel A (1) and section steel B (9), wherein the section steel A (1) and the section steel B (9) are respectively fixedly connected to the bridges on both sides of the expansion joint; characterized in that: A middle section steel (8) capable of relative movement is provided between the section steel A (1) and the section steel B (9). Two rotating shafts (3) arranged front and back are fixedly connected to the bottom surface of the middle section steel (8), and a rotating member is connected to each of the rotating shafts (3); a set of support frames (4), traction ropes (5) and connecting plates (6) are provided below the section steel A (1), the middle section steel (8) and the section steel B (9). There are two groups of four support frames (4) in total. A group of two support frames (4) are symmetrically arranged on the front and back sides of each rotating shaft (3). One end of the support frames (4) symmetrically arranged on the front and back sides of each rotating shaft (3) is a fixed end, and the other end is a sliding end. The fixed ends of the support frames (4) symmetrically arranged on the front and back sides of each rotating shaft (3) are located on the left and right sides of the rotating shaft (3). The sliding ends of the support frames (4) symmetrically arranged on the front and back sides of each rotating shaft (3) are located on the left and right sides of the rotating shaft (3). The fixed ends of the support frames (4) are used for fixedly connecting to the bottom surface of the section steel A (1) or the section steel B (9), and the sliding ends of the support frames (4) can relatively slide with the bottom surface of the section steel B (9) or the section steel A (1); connecting plates (6) are provided at the fixed ends and sliding ends of each support frame (4). The connecting plate (6) at the fixed end of one support frame (4) is connected to the connecting plate (6) at the sliding end of another support frame (4) symmetrically in the same group through a traction rope (5) bypassing the rotating member; the middle section steel (8) always relatively slides with the part between the fixed ends and the sliding ends of each support frame (4).

3. A bridge expansion displacement control component, comprising a profiled steel A (1) and a profiled steel B (9), wherein the profiled steel A (1) and the profiled steel B (9) are respectively fixedly connected to the bridges on both sides of the expansion joint; characterized in that: A plurality of intermediate steel sections (8) capable of relative movement are provided between the steel section A (1) and the steel section B (9). A rotating shaft (3) is fixedly connected to the bottom surface of each intermediate steel section (8), and two rotating members arranged up and down are connected to each rotating shaft (3). A plurality of sets of support frames (4), traction ropes (5) and connecting plates (6) with the same structure are provided below the steel section A (1), the steel section B (9) and each intermediate steel section (8). Starting from the steel section A (1) or the steel section B (9), every three adjacent steel sections share one set. Each set of support frames (4) are two symmetrically arranged on the front and rear sides of the rotating shaft (3). One end of each support frame (4) is a fixed end and the other end is a sliding end. The fixed ends of the two symmetric support frames (4) are located on the left and right sides of the rotating shaft (3), and the sliding ends of the two symmetric support frames (4) are located on the left and right sides of the rotating shaft (3). The fixed end of the support frame (4) is used for fixedly connecting with the bottom surface of the steel section A (1), the steel section B (9) or the intermediate steel section (8), and the sliding end of the support frame (4) can relatively slide with the bottom surface of the steel section B (9), the steel section A (1) or the intermediate steel section (8). Connecting plates (6) are provided at both the fixed end and the sliding end of each support frame (4). The connecting plate (6) at the fixed end of one support frame (4) is connected to the connecting plate (6) at the sliding end of the other symmetric support frame (4) through a traction rope (5) bypassing one rotating member, and the connecting plate (6) at the sliding end of one support frame (4) is connected to the connecting plate (6) at the fixed end of the other symmetric support frame (4) through a traction rope (5) bypassing the other rotating member. Each intermediate steel section (8) always relatively slides with the support frame (4) not fixedly connected thereto.

4. A bridge expansion displacement control component, comprising steel section A (1) and steel section B (9), wherein the steel section A (1) and the steel section B (9) are respectively fixedly connected to the bridges on both sides of the expansion joint; characterized in that: A plurality of intermediate profiles (8) capable of relative movement are provided between the profile A (1) and the profile B (9). Two rotating shafts (3) are fixedly connected to the bottom surface of each intermediate profile (8), and a rotating member is connected to each rotating shaft (3). Below the profile A (1), the intermediate profiles (8) and the profile B (9), a plurality of sets of support frames (4), traction ropes (5) and connecting plates (6) are provided. Starting from the profile A (1) or the profile B (9), every three adjacent profiles share one set. Each set of support frames (4) has two groups, a total of four. On both the front and rear sides of each rotating shaft (3), a set of two support frames (4) is symmetrically provided. One end of the support frames (4) on both the front and rear sides of each rotating shaft (3) is a fixed end, and the other end is a sliding end. The fixed ends of the symmetric support frames (4) on both the front and rear sides of each rotating shaft (3) are located on the left and right sides of the rotating shaft (3). The sliding ends of the symmetric support frames (4) on both the front and rear sides of each rotating shaft (3) are located on the left and right sides of the rotating shaft (3). The fixed end of the support frame (4) is used for fixedly connecting to the bottom surface of the profile A (1), the profile B (9) or the intermediate profile (8). The sliding end of the support frame (4) can relatively slide with the bottom surface of the profile B (9), the profile A (1) or the intermediate profile (8). Connecting plates (6) are provided at both the fixed end and the sliding end of each support frame (4). The connecting plate (6) at the sliding end of one support frame (4) in a group is connected to the connecting plate (6) at the fixed end of another symmetric support frame (4) in the same group through a traction rope (5) that bypasses the rotating member on a rotating shaft (3). The connecting plate (6) at the fixed end of one support frame (4) in the other group is connected to the connecting plate (6) at the sliding end of another symmetric support frame (4) in the same group through a traction rope (5) that bypasses the rotating member on another rotating shaft (3). Each intermediate profile (8) always relatively slides with the support frames (4) not fixedly connected thereto.

5. The bridge expansion displacement control component according to claim 3 or 4, characterized in that: The number of sets of the support frames (4), the traction ropes (5) and the connecting plates (6) is N, and the widths of N + 1 expansion joints between the profile A (1), the profile B (9) and each intermediate profile (8) with a total number of N + 2 can be controlled.

6. The bridge expansion displacement control component according to any one of claims 1 to 4, characterized in that: The length direction of the support frame (4) is perpendicular to the length directions of the profile A (1), the profile B (9) and the intermediate profile (8).

7. The bridge expansion displacement control component according to any one of claims 1 to 4, characterized in that: The rotating member is a rotating sleeve (2) or a pulley rotatably installed on the rotating shaft (3). The upper end of the rotating shaft (3) is fixedly connected to the intermediate profile (8). A nut (7) for pressing the rotating sleeve (2) or the pulley is threadedly connected to the lower end of the rotating shaft (3). Grooves are provided on the rotating sleeve (2) along the circumferential direction.

8. The bridge expansion displacement control component according to any one of claims 1 to 4, characterized in that: An elastic member for increasing the damping effect and adding pre-tightening is provided between the end of the traction rope (5) and the connecting plate (6).

9. The bridge expansion displacement control component according to any one of claims 1 to 4, characterized in that: One end of the connecting plate (6) is fixedly connected to the bottom surface of the support frame (4), and the other end of the connecting plate (6) is connected to the traction rope (5). The length direction of the connecting plate (6) is the same as the length directions of the profile A (1), the intermediate profile (8) or the profile B (9).

10. An installation control method for the bridge expansion displacement control component according to any one of claims 1 to 4, characterized in that: The installation includes the following steps Step A: Place the intermediate section steel (8) between the section steel A (1) and the section steel B (9), and determine the number of sets of support frames (4), towing ropes (5) and connecting plates (6) according to the number of the intermediate section steel (8). Step B: Arrange the support frames (4) perpendicular to the section steel A (1), the section steel B (9) and the intermediate section steel (8), and fix the fixed ends of the support frames (4) to the section steel A (1), the section steel B (9) or the intermediate section steel (8). Step C: Fix the connecting plates (6) to the lower surfaces of the fixed ends and the sliding ends of the support frames (4) respectively. Step D: Arrange a rotating shaft (3) between two symmetric support frames (4), and fix the rotating shaft (3) to the intermediate section steel (8). Step E: Install a rotating part on the rotating shaft (3). Step F: Wind the towing rope (5) around the rotating part, and fix the two ends of the towing rope (5) to the connecting plates (6) on the same side of two symmetric support frames (4) respectively. Step G: After the bridge expansion and contraction displacement control component is assembled, position and fix the section steel A (1) and the section steel B (9) on the bridges on both sides of the expansion joint respectively. After installation, when the width of the expansion joint between the single modules of the modular expansion device changes, the sliding ends of the support frames (4) slide relative to the section steel A (1), the section steel B (9) or the intermediate section steel (8), and the intermediate section steel (8) between the section steel A (1) and the section steel B (9) slides left and right on the support frames (4) under the action of the towing rope (5), so that the widths of the gaps between the section steel A (1) and the intermediate section steel (8), between the section steel B (9) and the intermediate section steel (8), and between adjacent intermediate section steels (8) are evenly equal.

Images