A bridge telescopic displacement control component and its installation control method

Abstract

The present invention belongs to the technical field of bridge construction engineering, specifically a bridge expansion displacement control component and its installation control method, wherein an intermediate steel section that can move relatively is provided between steel section A and steel section B, the bottom surface of the intermediate steel section is fixedly connected to a rotating shaft, and a rotating member is connected to the rotating shaft; a set of support frames, traction ropes and connecting plates are provided under each steel section, and the support frames are 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; each support frame is provided with a connecting plate at the fixed end and the sliding end, and the connecting plate at the fixed end of one support frame is connected to the connecting plate at the sliding end of the other symmetrical support frame by a traction rope that bypasses the rotating member; the intermediate steel section always slides relatively with the portion between the fixed ends and sliding ends of the two support frames. The present invention can make the intermediate steel sections slide relatively by the action of the traction rope in the absence of a power source, thereby ensuring that the expansion joint width between the steel sections is uniform.

Description

Technical Field

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

[0002] Displacement control components ensure a relatively uniform gap width between the various profiled steel sections of a modular telescopic device. Currently, displacement control components primarily come in two types: elastic and rigid. Elastic components are susceptible to breakage, resulting in high maintenance costs and a short service life. Rigid components are prone to rusting and seizing, and the connecting bolts are prone to loosening, resulting in loud impact noise when vehicles travel on bridges. Existing displacement control components are unable to effectively maintain uniform gap width between the individual sections of a modular telescopic device.

[0003] Therefore, it is particularly important to develop a displacement control component that can better control the uniformity of the seam width between the various steel sections of the modular telescopic 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 various steel sections in existing modular telescopic devices, abnormal noise in telescopic displacement control components, and short service life, the purpose of the present invention is to provide a bridge telescopic displacement control component and its installation control method.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] The bridge expansion displacement control component of the first structure of the present invention includes steel section A and steel section B, and the steel section A and steel section B are respectively fixed to the bridge on both sides of the expansion joint; an intermediate steel section that can move relatively is provided between the steel section A and the steel section B, and a rotating shaft is fixed to the bottom surface of the intermediate steel section, and two rotating parts arranged upper and lower are connected to the rotating shaft; a set of support frames, traction ropes and connecting plates are provided below the steel section A, the intermediate steel section and the steel section B, and the support frames are 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, and the fixed ends of the two symmetrical support frames are located on the left and right sides of the rotating shaft, and the two symmetrical The sliding ends of the support frame are located on the left and right sides of the rotating shaft, and the fixed end of the support frame is used to be fixed to the bottom surface of the steel section A or the steel section B, and the sliding end of the support frame can slide relative to the bottom surface of the steel section B or the steel section A; the fixed end and the sliding end of each of the support frames are provided with a connecting plate, and the connecting plate of the fixed end of one of the support frames is connected to the connecting plate of the sliding end of another symmetrical support frame by a traction rope that bypasses a rotating part, and the connecting plate of the sliding end of one of the support frames is connected to the connecting plate of the fixed end of another symmetrical support frame by a traction rope that bypasses another rotating part; the intermediate steel section always slides relative to the part between the fixed end and the sliding end of the two support frames.

[0007] The bridge telescopic displacement control component of the second structure of the present invention includes steel section A and steel section B, and the steel section A and steel section B are respectively fixed to the bridge on both sides of the expansion joint; an intermediate steel section that can move relatively is provided between the steel section A and the steel section B, and the bottom surface of the intermediate steel section is fixed with two rotating shafts arranged in front and back, and each of the rotating shafts is connected to a rotating part; a set of support frames, traction ropes and connecting plates are provided below the steel section A, the intermediate steel section and the steel section B, and the support frames are divided into two groups of four, and a group of two support frames are symmetrically provided on the front and back sides of each rotating shaft, and one end of the symmetrical support frames on the front and back sides of each rotating shaft is a fixed end and the other end is a sliding end. The fixed ends of the symmetrical 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 symmetrical 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 ends of the support frames are used to be fixed to the bottom surface of the steel section A or the steel section B, and the sliding ends of the support frames can slide relative to the bottom surface of the steel section B or the steel section A; the fixed ends and sliding ends of each of the support frames are provided with connecting plates, and the connecting plate of the fixed end of one of the support frames is connected to the connecting plate of the sliding end of another symmetrical support frame in the same group by a traction rope that bypasses the rotating part; the intermediate steel section always slides relative to the part between the fixed end and the sliding end of each of the support frames.

[0008] The bridge telescopic displacement control component of the third structure of the present invention includes steel section A and steel section B, and the steel section A and steel section B are respectively fixed to the bridge on both sides of the expansion joint; a plurality of intermediate steel sections that can move relatively are arranged between the steel section A and the steel section B, and the bottom surface of each intermediate steel section is fixed with a rotating shaft, and each rotating shaft is connected to two rotating parts arranged above and below; a plurality of sets of support frames, traction ropes and connecting plates with the same structure are arranged below the steel section A, steel section B and each intermediate steel section, starting from the steel section A or steel section B, every three adjacent steel sections share one set, and each set of support frames is 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, and the fixed ends of the two symmetrical support frames are connected. Located on the left and right sides of the rotating shaft, the sliding ends of the two symmetrical support frames are located on the left and right sides of the rotating shaft, the fixed end of the support frame is used to be fixed to the bottom surface of the steel section A, steel section B or the intermediate steel section, and the sliding end of the support frame and the bottom surface of the steel section B, steel section A or the intermediate steel section can slide relative to each other; the fixed end and the sliding end of each of the support frames are provided with a connecting plate, the connecting plate of the fixed end of one of the support frames and the connecting plate of the sliding end of the other symmetrical support frame are connected by a traction rope that bypasses a rotating part, and the connecting plate of the sliding end of one of the support frames and the connecting plate of the fixed end of the other symmetrical support frame are connected by a traction rope that bypasses another rotating part; each of the intermediate steel sections always slides relative to the support frame that is not fixed thereto.

[0009] The fourth structure of the bridge telescopic displacement control component of the present invention includes steel section A and steel section B, and the steel section A and steel section B are respectively fixed to the bridge on both sides of the expansion joint; a plurality of intermediate steel sections that can move relatively are provided between the steel section A and the steel section B, and the bottom surface of each intermediate steel section is fixed with two rotating shafts, and each rotating shaft is connected to a rotating member; multiple sets of support frames, traction ropes and connecting plates are provided under the steel section A, intermediate steel sections and steel section B, starting from the steel section A or steel section B, every three adjacent steel sections share a set, and each set of support frames consists of two groups of four in total, and a group of two support frames is symmetrically provided on the front and rear sides of each rotating shaft, and 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, and the fixed ends of the symmetrical support frames on the front and rear sides of each rotating shaft are located at the rotating shaft. On the left and right sides of the axis, the sliding ends of the symmetrical support frames on the front and rear sides of each rotating axis are located on the left and right sides of the rotating axis, and the fixed ends of the support frames are used to be fixed to the bottom surface of steel section A, steel section B or intermediate steel section, and the sliding ends of the support frames can slide relative to the bottom surface of steel section B, steel section A or intermediate steel section; the fixed ends and sliding ends of each of the support frames are provided with connecting plates, and the connecting plate of the sliding end of one of the support frames in one group is connected to the connecting plate of the fixed end of another symmetrical support frame in the same group by a traction rope that passes through a rotating part on a rotating axis, and the connecting plate of the fixed end of one of the support frames in another group is connected to the connecting plate of the sliding end of another symmetrical support frame in the same group by a traction rope that passes through a rotating part on another rotating axis; each of the intermediate steel sections always slides relative to the support frame that is not fixed thereto.

[0010] Among them: the number of sets of the support frame, traction rope and connecting plate is N, which can control the total number of N+2 steel sections A, steel section B and N+1 expansion joint widths between each intermediate steel section.

[0011] The length direction of the support frame is perpendicular to the length directions of the steel section A, the steel section B and the intermediate steel section.

[0012] The rotating member is a rotating sleeve or pulley rotatably mounted on a rotating shaft. The upper end of the rotating shaft is fixedly connected to the middle steel section, and the lower end of the rotating shaft is threadedly connected to a nut that presses the rotating sleeve or pulley. A groove is provided on the rotating sleeve along the circumferential direction.

[0013] An elastic member for increasing the damping effect and adding pre-tightening is provided between the end of the traction rope and the connecting plate.

[0014] One end of the connecting plate is fixedly connected to the bottom surface of the support frame, and the other end of the connecting plate is connected to the traction rope. The length direction of the connecting plate is in the same direction as the length direction of the steel section A, the intermediate steel section or the steel section B.

[0015] The installation control method of the bridge telescopic displacement control component of the present invention includes the following steps during installation:

[0016] Step A: placing an intermediate steel section between the steel section A and the steel section B, and determining the number of sets of support frames, traction ropes, and connecting plates according to the number of the intermediate steel sections;

[0017] Step B: arranging the support frame vertically with the steel section A, the steel section B, and the intermediate steel section, and fixing the fixed end of the support frame to the steel section A, the steel section B, or the intermediate steel section;

[0018] Step C, fixing connecting plates to the lower surfaces of the fixed end and the sliding end of the support frame respectively;

[0019] Step D, arranging a rotating shaft between the two symmetrical support frames and fixing the rotating shaft on the middle steel;

[0020] Step E, installing a rotating member on the rotating shaft;

[0021] Step F, passing the traction rope around the rotating member, and fixing both ends of the traction rope to the connecting plates on the same side of two symmetrical support frames;

[0022] Step G: After the bridge expansion and displacement control components are assembled, the steel sections A and B are positioned and fixed on the bridge at both sides of the expansion joint;

[0023] After the installation is completed, when the width of the expansion joint between each single module of the modular expansion device changes, the sliding end of the support frame slides relative to the steel section A, steel section B or the intermediate steel section, and the intermediate steel section located between the steel section A and the steel section B slides left and right on the support frame through the action of the traction rope, thereby making the width of the gap between the steel section A and the intermediate steel section, the width of the gap between the steel section B and the intermediate steel section, and the width of the gap between adjacent intermediate steel sections uniform.

[0024] The advantages and positive effects of the present invention are:

[0025] 1. The bridge expansion and contraction displacement control component of the present invention can make the intermediate steel sections slide relative to each other through the action of a fixed-length traction rope in the absence of a power source, thereby ensuring uniform expansion joint widths between the steel sections.

[0026] 2. The bridge telescopic displacement control component of this invention incorporates an elastic element at the end of the traction rope, or adjusts the traction rope material to enhance damping, preventing abrupt changes in the width of the gap between the individual modes of the telescopic device during driving or braking, thereby minimizing noise. Alternatively, a preload mechanism is added to provide sufficient preload force. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a bottom view of the structure of the bridge telescopic displacement control component according to the present invention;

[0028] Figure 2 for Figure 1 A-A sectional view in FIG;

[0029] Figure 3 This is a bottom view of the structure of the second embodiment of the bridge telescopic displacement control component of the present invention;

[0030] Figure 4 for Figure 3 The B-B section view in FIG;

[0031] Figure 5 This is a bottom view of the structure of the third embodiment of the bridge telescopic displacement control component of the present invention;

[0032] Figure 6 for Figure 5 C-C section in;

[0033] Figure 7 This is a bottom view of the structure of the fourth embodiment of the bridge telescopic displacement control component of the present invention;

[0034] Figure 8 for Figure 7 D-D section in;

[0035] Figure 9 for Figure 7 E-E section in;

[0036] Figure 10 This is a bottom view of the structure of the fifth embodiment of the bridge telescopic displacement control component of the present invention;

[0037] Figure 11 for Figure 10 F-F section in;

[0038] Figure 12 for Figure 10 G-G cross-sectional view in;

[0039] Figure 13 for Figure 10 H-H cross-sectional view in;

[0040] Figure 14 This is a bottom view of the structure of the sixth embodiment of the bridge telescopic displacement control component of the present invention;

[0041] Figure 15 This is a bottom view of the structure of the seventh embodiment of the bridge telescopic displacement control component of the present invention;

[0042] Figure 16 for Figure 15 A partial enlarged view of point I in the middle;

[0043] Figure 17 This is a structural cross-sectional view of the bridge telescopic displacement control component according to the first embodiment of the present invention installed on a bridge;

[0044] Figure 18 This is a working state diagram of the bridge telescopic displacement control component when the expansion joint width increases according to the first embodiment of the present invention;

[0045] Figure 19 This is a working state diagram of the bridge telescopic displacement control component when the expansion joint width becomes smaller in embodiment 1 of the present invention;

[0046] Among them: 1 is steel A, 2 is rotating part, 3 is rotating shaft, 4 is supporting frame, 5 is traction rope, 6 is connecting plate, 7 is nut, 8 is intermediate steel, 9 is steel B, 10 is disc spring, 11 is beam body, and 12 is steel fiber concrete. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] Example 1

[0049] like Figure 1 、 Figure 2 As shown, the bridge expansion and contraction displacement control component of this embodiment includes steel section A1 and steel section B9, which are respectively fixed to the steel fiber concrete 12 on the beam body 11 on both sides of the expansion joint. An intermediate steel section 8 capable of relative movement is provided between the steel section A1 and the steel section B9, and a rotating shaft 3 is fixed to the bottom surface of the intermediate steel section 8, and two rotating parts arranged upper and lower are connected to the rotating shaft 3. A set of support frames 4, traction ropes 5 and connecting plates 6 are provided below the steel section A1, the intermediate steel section 8 and the steel section B9. The support frames 4 are 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 symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3, that is, the fixed ends of the two symmetrical support frames 4 are arranged in one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged in another diagonal line. The fixed ends of the support frames 4 are used to be fixed to the bottom surface of the steel section A1 or the steel section B9, and the sliding ends of the support frames 4 can slide relative to the bottom surface of the steel section B9 or the steel section A1. Each support frame 4 is equipped with a connecting plate 6 at both its fixed and sliding ends. 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 symmetrical support frame 4 by a traction rope 5 that passes through 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 other symmetrical support frame 4 by a traction rope 5 that passes through another rotating member. Intermediate steel sections 8 constantly slide relative to the portion between the fixed and sliding ends of the two support frames 4.

[0050] The steel section A1, the intermediate steel section 8, and the steel section B9 of this embodiment can be various steel sections used in modular telescopic devices. The steel section A1, the intermediate steel section 8, and the steel section B9 are arranged horizontally and parallel to each other.

[0051] The support frames 4 of this embodiment are rectangular, with their lengths perpendicular to the lengths of the steel sections A1, B9, and 8, and the two support frames 4 are arranged in parallel. The support frames 4 of this embodiment can be made of steel plates, angle steel, or channel steel, ensuring that they do not interfere with other components.

[0052] In this embodiment, one end of the connecting plate 6 is fixed 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 the steel A1, the intermediate steel 8 or the steel B9.

[0053] The rotating member is a rotating sleeve 2 or pulley rotatably mounted on a rotating shaft 3, capable of rotating about the shaft and securing the traction rope 5. The upper end of the rotating shaft 3 is fixedly connected to an intermediate steel section 8, and the lower end of the rotating shaft 3 is threadedly connected to a nut 7 that compresses the rotating sleeve 2 or pulley. In this embodiment, the rotating member is the rotating sleeve 2, which is assembled with the rotating shaft 3 and can rotate about the shaft 3. The rotating sleeve 2 can be a pipe with grooves machined along the circumference of the surface.

[0054] The traction rope 5 and the connecting plate 6 of this embodiment can be fixed by bundling, welding or bolting.

[0055] In this embodiment, an elastic part is added to the end of the traction rope 5, and the material of the traction rope 5 can also be adjusted to increase the damping effect or provide pre-tightening force; the material of the traction rope 5 can be stainless steel wire rope or zinc-infiltrated steel wire, and the material of the traction rope 5 can also 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 to 0.17), which can effectively ensure the service life of the bridge telescopic displacement control component.

[0056] Example 2

[0057] like Figure 3 、 Figure 4As shown, the difference between this embodiment and the first embodiment is that in this embodiment, two rotating shafts 3 are fixedly connected to the bottom surface of the middle section steel 8, and each rotating shaft 3 is connected to a rotating member. A set of support frames 4, a traction rope 5, and a connecting plate 6 are provided below the section steel A1, the middle section steel 8, and the section steel B9. There are two groups of four support frames 4, with two support frames 4 symmetrically provided on the front and rear sides of each rotating shaft 3. One end of the symmetrical 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 symmetrical 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 symmetrical 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 symmetrical support frames 4 are arranged diagonally, and the sliding ends of the two symmetrical support frames 4 are arranged diagonally. The fixed ends of the support frames 4 are used to be fixed to the bottom surface of the section steel A1 or 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 section steel A1. Each support frame 4 is equipped with a connecting plate 6 at both its fixed and sliding ends. 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 symmetrical support frame 4 in the same group by a traction rope 5 that passes around the rotating member. Intermediate steel sections 8 constantly slide relative to the portion between the fixed and sliding ends of each support frame 4.

[0058] The rest are the same as those in the first embodiment.

[0059] Example 3

[0060] like Figure 5 、 Figure 6As shown, the difference between this embodiment and the first embodiment is that two intermediate steel sections 8 capable of relative movement are provided between steel section A1 and steel section B9 in this embodiment. A rotating shaft 3 is fixedly attached to the bottom surface of each intermediate steel section 8, and each rotating shaft 3 is connected to two rotating parts arranged above and below. Two sets of identical support frames 4, traction ropes 5, and connecting plates 6 are provided below steel section A1, steel section B9, and each intermediate steel section 8. Starting from steel section A1 or steel section B9, every three adjacent steel sections share one set; that is, steel section A1 shares one set with the two intermediate steel sections 8, controlling the gap width between steel section A1 and the first intermediate steel section 8 and the gap width between the two intermediate steel sections 8. The two intermediate steel sections 8 share another set with steel section B9, controlling the gap width between the two intermediate steel sections 8 and the gap width between the second intermediate steel section 8 and steel section B9. Each set of support frames 4 is 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 symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the support frames 4 that share a set of steel sections A1 and the two intermediate steel sections 8 are used to fix to the bottom surfaces of steel sections A1 and the second intermediate steel sections 8. The sliding ends of the support frames 4 that share a set of steel sections A1 and the two intermediate steel sections 8 can slide relative to the bottom surfaces of steel sections A1 and the second intermediate steel sections 8. The two intermediate steel sections 8 and the steel section B9 share another set of support frames 4 whose fixed ends are used to be fixed to the steel section B9 and the bottom surface of the first intermediate steel section 8. The two intermediate steel sections 8 and the steel section B9 share another set of support frames 4 whose sliding ends are able to slide relative to the bottom surfaces of the steel section B9 and the first intermediate steel section 8. The lower surfaces of the fixed and sliding ends of each support frame 4 are provided with connecting plates 6. The connecting plates 6 at the fixed end of one support frame 4 are connected to the connecting plates 6 at the sliding end of another symmetrical support frame 4 by a traction rope 5 that passes around a rotating part. The connecting plates 6 at the sliding end of one support frame 4 are connected to the connecting plates 6 at the fixed end of another symmetrical support frame 4 by a traction rope 5 that passes around another rotating part. Each intermediate steel section 8 always slides relative to the support frame 4 that is not fixed to it.

[0061] The rest are the same as those in the first embodiment.

[0062] Example 4

[0063] like Figures 7-9As shown, the difference between this embodiment and the third embodiment is that, in this embodiment, the bottom surface of each of the two intermediate steel sections 8 is fixedly connected to two rotating shafts 3 disposed front and rear, and each rotating shaft 3 is connected to a rotating member. Two sets of support frames 4, traction ropes 5, and connecting plates 6 are provided below the steel sections A1, B9, and each intermediate steel section 8. Starting from steel section A1 or B9, every three adjacent steel sections share one set; that is, steel section A1 shares one set with the two intermediate steel sections 8, controlling the gap width between steel section A1 and the first intermediate steel section 8 and the gap width between the two intermediate steel sections 8. The two intermediate steel sections 8 share another set with steel section B9, controlling the gap width between the two intermediate steel sections 8 and the gap width between the second intermediate steel section 8 and steel section B9.

[0064] The steel section A1 and the two intermediate steel sections 8 share a set of two support frames 4, with a total of four. A set of two support frames 4 is symmetrically provided on the front and rear sides of each rotating shaft 3. 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 symmetrical 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 symmetrical 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 symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the support frames 4 that the steel section A1 and the two intermediate steel sections 8 share a set are used to be fixed to the bottom surfaces of the steel section A1 and the second intermediate steel section 8, and the sliding ends of the support frames 4 that the steel section A1 and the two intermediate steel sections 8 share a set can slide relative to the bottom surfaces of the steel section A1 and the second intermediate steel section 8. The lower surfaces of the fixed end and the sliding end of each support frame 4 are provided with a connecting plate 6. The connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the second intermediate steel section 8 and the connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the steel section A1 are connected by a traction rope 5 that passes around a rotating part on a rotating shaft 3. The connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the second intermediate steel section 8 and the connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the steel section A1 are connected by a traction rope 5 that passes around a rotating part on another rotating shaft 3.

[0065] The two intermediate steel sections 8 and the steel section B9 share another set of support frames 4, which are divided into two groups with a total of four. A group of two support frames 4 is symmetrically provided on the front and rear sides of each rotating shaft 3. 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 symmetrical 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 symmetrical 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 symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the support frames 4 shared by the two intermediate steel sections 8 and the steel section B9 are used to be fixed to the bottom surface of the steel section B9 and the first intermediate steel section 8, and the sliding ends of the support frames 4 shared by the two intermediate steel sections 8 and the steel section B9 can slide relative to the bottom surface of the steel section B9 and the first intermediate steel section 8. The lower surfaces of the fixed end and the sliding end of each support frame 4 are provided with a connecting plate 6. The connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the steel section B9 and the connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the first intermediate steel section 8 are connected by a traction rope 5 that passes around a rotating part on a rotating shaft 3. The connecting plate with the fixed end on the lower surface of the fixed end of the support frame 4 of the steel section B9 and the connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the first intermediate steel section 8 are connected by a traction rope 5 that passes around a rotating part on another rotating shaft 3.

[0066] Each intermediate steel section 8 always slides relative to the support frame 4 which is not fixed thereto.

[0067] The rest are the same as those in Example 3.

[0068] Example 5

[0069] like Figures 10-13 As shown, the difference between this embodiment and the third embodiment is that three relatively movable intermediate steel sections 8 are provided between steel section A1 and steel section B9 in this embodiment. Each intermediate steel section 8 has a rotating shaft 3 fixed to its bottom surface, and each rotating shaft 3 is connected to two rotating members arranged above and below. Three sets of identical support frames 4, traction ropes 5, and connecting plates 6 are provided below steel section A1, steel section B9, and each intermediate steel section 8. Starting from steel section A1 or steel section B9, each of three adjacent steel sections shares one set. Specifically, steel section A1 shares the first set with the first and second intermediate steel sections 8, controlling the gap width between steel section A1 and the first intermediate steel section 8 and the gap width between the first and second intermediate steel sections 8. The three intermediate steel sections 8 share the second set, controlling the gap width between the three intermediate steel sections 8. The second and third intermediate steel sections 8 share the third set with steel section B9, controlling the gap width between the second and third intermediate steel sections 8 and the gap width between the third intermediate steel section 8 and steel section B9.

[0070] The first set of support frames 4 shared by steel section A1 and the first and second intermediate steel sections 8 is 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 symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the first set of support frames 4 shared by steel section A1 and the first and second intermediate steel sections 8 are used to be fixed to the bottom surfaces of steel section A1 and the second intermediate steel section 8, and the sliding ends of the first set of support frames 4 shared by steel section A1 and the first and second intermediate steel sections 8 can slide relative to the bottom surfaces of steel section A1 and the second intermediate steel section 8. The lower surfaces of the fixed end and the sliding end of each support frame 4 are provided with a connecting plate 6. 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 symmetrical support frame 4 by a traction rope 5 that passes around a rotating part. 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 another symmetrical support frame 4 by a traction rope 5 that passes around another rotating part.

[0071] The second set of support frames 4 shared by the three intermediate steel sections 8 is 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 symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the support frames 4 of the second set shared by the three intermediate steel sections 8 are used to be fixed to the bottom surfaces of the first and third intermediate steel sections 8, and the sliding ends of the support frames 4 of the second set shared by the three intermediate steel sections 8 can slide relative to the bottom surfaces of the first and third intermediate steel sections 8. The lower surfaces of the fixed end and the sliding end of each support frame 4 are provided with a connecting plate 6. 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 symmetrical support frame 4 by a traction rope 5 that passes around a rotating part. 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 another symmetrical support frame 4 by a traction rope 5 that passes around another rotating part.

[0072] The second and third intermediate steel sections 8 share a third set with the steel section B9. The support frames 4 are 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 symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3, and the sliding ends of the two symmetrical support frames 4 are located on the left and right sides of the rotating shaft 3. That is, the fixed ends of the two symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the support frames 4 of the third set shared by the second and third intermediate steel sections 8 and the steel section B9 are used to be fixed to the bottom surface of the steel section B9 and the second intermediate steel section 8. The sliding ends of the support frames 4 of the third set shared by the second and third intermediate steel sections 8 and the steel section B9 can slide relative to the bottom surface of the steel section B9 and the second intermediate steel section 8. The lower surfaces of the fixed end and the sliding end of each support frame 4 are provided with a connecting plate 6. 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 symmetrical support frame 4 by a traction rope 5 that passes around a rotating part. 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 another symmetrical support frame 4 by a traction rope 5 that passes around another rotating part.

[0073] Each intermediate steel section 8 always slides relative to the support frame 4 which is not fixed thereto.

[0074] The rest are the same as those in Example 3.

[0075] Example 6

[0076] like Figure 14 As shown, the difference between this embodiment and the fourth embodiment is that three relatively movable intermediate steel sections 8 are provided between steel section A1 and steel section B9 in this embodiment. The bottom surface of each intermediate steel section 8 is fixedly connected to two rotating shafts 3 disposed front and rear, and each rotating shaft 3 is connected to a rotating member. Three sets of identical support frames 4, traction ropes 5, and connecting plates 6 are provided beneath steel section A1, steel section B9, and each intermediate steel section 8. Starting from steel section A1 or steel section B9, each of three adjacent steel sections shares a common set. Specifically, steel section A1 shares the first set with the first and second intermediate steel sections 8, controlling the gap width between steel section A1 and the first intermediate steel section 8 and the gap width between the first and second intermediate steel sections 8. The three intermediate steel sections 8 share the second set, controlling the gap width between the three intermediate steel sections 8. The second and third intermediate steel sections 8 share the third set with steel section B9, controlling the gap width between the second and third intermediate steel sections 8 and the gap width between the third intermediate steel section 8 and steel section B9.

[0077] The first set of support frames 4 shared by steel section A1 and the first and second intermediate steel sections 8 consists of two groups of four support frames 4. A group of two support frames 4 is symmetrically provided on the front and rear sides of each rotating shaft 3. 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 symmetrical 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 symmetrical 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 symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the first set of support frames 4 shared by steel section A1 and the first and second intermediate steel sections 8 are used to be fixed to the bottom surfaces of steel section A1 and the second intermediate steel section 8, and the sliding ends of the first set of support frames 4 shared by steel section A1 and the first and second intermediate steel sections 8 can slide relative to the bottom surfaces of steel section A1 and the second intermediate steel section 8. The lower surfaces of the fixed end and the sliding end of each support frame 4 are provided with a connecting plate 6. The connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the second intermediate steel section 8 and the connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the steel section A1 are connected by a traction rope 5 that passes around a rotating part on a rotating shaft 3. The connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the second intermediate steel section 8 and the connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the steel section A1 are connected by a traction rope 5 that passes around a rotating part on another rotating shaft 3.

[0078] The second set of support frames 4 shared by the three intermediate steel sections 8 is divided into two groups of four, with a group of two support frames 4 symmetrically provided on the front and rear sides of each rotating shaft 3. 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 symmetrical 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 symmetrical 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 symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the support frames 4 of the second set shared by the three intermediate steel sections 8 are used to be fixed to the bottom surfaces of the first intermediate steel section 8 and the third intermediate steel section 8, and the sliding ends of the support frames 4 of the second set shared by the three intermediate steel sections 8 can slide relative to the bottom surfaces of the first intermediate steel section 8 and the third intermediate steel section 8. The lower surfaces of the fixed end and the sliding end of each support frame 4 are provided with a connecting plate 6. The connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the third intermediate steel section 8 and the connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the first intermediate steel section 8 are connected by a traction rope 5 that passes around a rotating part on a rotating shaft 3. The connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the third intermediate steel section 8 and the connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the first intermediate steel section 8 are connected by a traction rope 5 that passes around a rotating part on another rotating shaft 3.

[0079] The second and third intermediate steel sections 8 and steel section B9 share a third set of support frames 4, which are divided into two groups with a total of four. A group of two support frames 4 is symmetrically provided on the front and rear sides of each rotating shaft 3. 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 symmetrical 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 symmetrical 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 symmetrical support frames 4 are arranged on one diagonal line, and the sliding ends of the two symmetrical support frames 4 are arranged on another diagonal line. The fixed ends of the support frames 4 of the third set shared by the second and third intermediate steel sections 8 and steel section B9 are used to be fixed to the bottom surface of the second intermediate steel section 8 and steel section B9, and the sliding ends of the support frames 4 of the third set shared by the second and third intermediate steel sections 8 and steel section B9 can slide relative to the bottom surface of the second intermediate steel section 8 and steel section B9. The lower surfaces of the fixed end and the sliding end of each support frame 4 are provided with a connecting plate 6. The connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the steel section B9 and the connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the second intermediate steel section 8 are connected by a traction rope 5 that passes around a rotating part on a rotating shaft 3. The connecting plate 6 with the fixed end on the lower surface of the fixed end of the support frame 4 of the steel section B9 and the connecting plate 6 with the fixed end on the lower surface of the sliding end of the support frame 4 of the second intermediate steel section 8 are connected by a traction rope 5 that passes around a rotating part on another rotating shaft 3.

[0080] Each intermediate steel section 8 always slides relative to the support frame 4 which is not fixed thereto.

[0081] The rest are the same as those in Example 4.

[0082] Example 7

[0083] like Figure 15 、 Figure 16 As shown, the difference between this embodiment and embodiment 1 is that, in this embodiment, an elastic member is added between the end of the traction rope 5 and the connecting plate 6, and the elastic member can be a disc spring; the disc spring has a damping effect, which can prevent the gap width between each single mode of the telescopic device from changing sharply when driving or braking, and can also minimize noise; furthermore, 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 telescopic displacement control components during operation, and provide sufficient pre-tightening force.

[0084] The rest are the same as those in the first embodiment.

[0085] As can be seen from Examples 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 sections. When the displacement of the bridge expansion joint is large, the number of intermediate steel sections 8 increases accordingly, and more sets of support frames 4, traction ropes 5, and connecting plates 6 need to be added accordingly. 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 a total of N+2 steel sections A1, steel section B9, and each intermediate steel section 8. For example, two sets of support frames 4, traction ropes 5, and connecting plates 6 can ensure that the three gaps of four steel sections are uniform. By analogy, N sets of support frames 4, traction ropes 5, and connecting plates 6 can ensure that the N+1 seam widths corresponding to N+2 steel sections are uniform. Therefore, the telescopic displacement control component of the present invention can be applied to telescopic devices with large displacements.

[0086] In addition, the present invention can satisfy the control of the width of the seams of various steel sections of the modular telescopic device while also adapting to the vertical, horizontal and longitudinal displacements and rotation angles of the telescopic device.

[0087] When the bridge beam gap changes due to factors such as temperature, load, concrete shrinkage and creep, the gap width of the steel sections also changes accordingly. Since the length of the traction rope 5 is fixed, the bridge telescopic displacement control component of the present invention can ensure that the gap width between the steel sections is uniform. The installation process includes the following steps:

[0088] Step A: Place the intermediate steel 8 between the steel A1 and the steel B9, and determine the number of sets of support frames 4, traction ropes 5 and connecting plates 6 according to the number of intermediate steels 8;

[0089] Step B: Arrange the support frame 4 perpendicularly to the steel section A1, steel section B9, and the middle steel section 8, and fix the two fixed ends of the two symmetrical support frames 4 located on the diagonal line to the steel section A1, steel section B9, or the middle steel section 8. The two sliding ends of the two symmetrical support frames 4 located on the diagonal line are movable ends.

[0090] Step C, fixing the connecting plate 6 to the lower surface of the fixed end and the sliding end of the support frame 4 respectively;

[0091] Step D: Arrange a rotating shaft 3 between two symmetrical support frames 4 and fix the rotating shaft 3 to the bottom surface of the middle steel section 8;

[0092] Step E, installing a rotating member on the rotating shaft 3;

[0093] 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;

[0094] Step G, install the bridge expansion displacement control component, position the steel A1 and steel B9 on the steel fiber concrete 12 of the beam 11 on both sides of the expansion joint and fix them, as shown in the following figure: Figure 17 As shown;

[0095] After installation, when the width of the expansion joint between the modules of the modular expansion joint changes (such as Figure 18 、 Figure 19 As shown in the figure, the sliding end of the support frame 4 slides relative to the steel section A1, the steel section B9 or the intermediate steel section 8, and the intermediate steel section 8 located between the steel section A1 and the steel section B9 slides left and right on the support frame 4 through the action of the traction rope 5, thereby making the gap width between the steel section A1 and the intermediate steel section 8, the gap width between the steel section B9 and the intermediate steel section 8, and the gap width between adjacent intermediate steel sections 8 uniform and equal.

[0096] Taking Example 1 as an example, there are three steel sections (steel section A1, intermediate steel section 8, and steel section B9). The installation steps are as follows:

[0097] Step A: Two support frames 4 are arranged perpendicularly to the steel sections A1 and B9 on the left and right sides, and are firmly fixed diagonally to the steel sections A1 and B9 on the left and right sides, with the other two diagonally opposite ends being movable ends;

[0098] Step B: fix the four connecting plates 6 to the fixed ends and sliding ends of the two support frames 4 respectively;

[0099] Step C: Arrange the rotating shaft 3 on the bottom surface of the middle steel 8, between the two support frames 4, and firmly fix it to the bottom surface of the middle steel 8;

[0100] Step D: Install the first rotating sleeve 2 and the first traction rope 5. The first traction rope 5 is passed around the first rotating sleeve 2. Both ends of the first traction rope 5 are fixed to the connecting plates 6 on one side of the two support frames 4.

[0101] Step E: Install the second rotating sleeve 2 and the second traction rope 5. Pass the second traction rope 5 around the second rotating sleeve 2. The two 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 two traction ropes 5 are in opposite directions. Tighten the nuts 7 to compress the two rotating sleeves 2.

[0102] In step F, the assembled bridge expansion displacement control components are respectively positioned on the steel fiber concrete 12 of the beams 11 on both sides of the expansion joint and fixed.

[0103] When the number of intermediate steel sections 8 increases, more sets of support frames 4, traction ropes 5 and connecting plates 6 are needed. Similarly, for each additional intermediate steel section 8, one set of support frames 4, traction ropes 5 and connecting plates 6 is added, and the implementation method is the same.

Claims

1. A bridge expansion displacement control component, comprising a steel section A (1) and a steel section B (9), wherein the steel section A (1) and the steel section B (9) are respectively fixed to the bridge on both sides of the expansion joint; characterized in that: An intermediate steel section (8) capable of relative movement is 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 the intermediate steel section (8), the axial direction of the rotating shaft (3) is in the vertical direction, and two rotating parts arranged above and below are connected to the rotating shaft (3); a set of support frames (4), a traction rope (5) and a connecting plate (6) are provided below the steel section A (1), the intermediate steel section (8) and the steel section B (9), the support frames (4) are 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 symmetrical support frames (4) are located on the left and right sides of the rotating shaft (3), and the sliding ends of the two symmetrical 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 to be fixed to the bottom surface of the steel section A (1) or the steel section B (9), and the sliding end of the support frame (4) can slide relative to the bottom surface of the steel section B (9) or the steel section A (1); the fixed end and the sliding end of each support frame (4) are provided with a connecting plate (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 another symmetrical support frame (4) by a traction rope (5) bypassing a rotating part, 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 another symmetrical support frame (4) by a traction rope (5) bypassing another rotating part; the intermediate steel section (8) always slides relative to the portion between the fixed end and the sliding end of the two support frames (4).

2. A bridge expansion displacement control component, comprising a steel section A (1) and a steel section B (9), wherein the steel section A (1) and the steel section B (9) are respectively fixed to the bridge on both sides of the expansion joint; characterized in that: An intermediate steel section (8) capable of relative movement is provided between the steel section A (1) and the steel section B (9), and two rotating shafts (3) arranged front and back are fixedly connected to the bottom surface of the intermediate steel section (8), and the axial direction of the rotating shaft (3) is in the vertical direction. Each rotating shaft (3) is connected to a rotating member; a set of support frames (4), a traction rope (5) and a connecting plate (6) are provided below the steel section A (1), the intermediate steel section (8) and the steel section B (9), and the support frames (4) are divided into two groups, a total of four, and a group of two support frames (4) are symmetrically provided on the front and back sides of each rotating shaft (3), and one end of the symmetrical 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 symmetrical support frames (4) on the front and back sides of each rotating shaft (3) are The fixed ends are located on the left and right sides of the rotating shaft (3), and the sliding ends of the symmetrical 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). The fixed ends of the support frames (4) are used to be fixed to the bottom surface of the steel section A (1) or the steel section B (9), and the sliding ends of the support frames (4) can slide relative to the bottom surface of the steel section B (9) or the steel section A (1); the fixed ends and sliding ends of each support frame (4) are provided with a connecting plate (6), and the connecting plate (6) of the fixed end of one support frame (4) and the connecting plate (6) of the sliding end of another symmetrical support frame (4) in the same group are connected by a traction rope (5) that bypasses the rotating member; the intermediate steel section (8) always slides relative to the portion between the fixed end and the sliding end of each support frame (4).

3. A bridge expansion displacement control component, comprising a steel section A (1) and a steel section B (9), wherein the steel section A (1) and the steel section B (9) are respectively fixed to the bridge 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), and the bottom surface of each intermediate steel section (8) is fixedly connected to a rotation shaft (3), the axial direction of the rotation shaft (3) is in the vertical direction, and each rotation shaft (3) is connected to two rotating parts arranged above and below; a plurality of sets of support frames (4), traction ropes (5) and connecting plates (6) of the same structure are provided below the steel section A (1), the steel section B (9) and each intermediate steel section (8), and starting from the steel section A (1) or the steel section B (9), every three adjacent steel sections share one set, and each set of support frames (4) is symmetrically arranged on the front and rear sides of the rotation shaft (3), one end of each support frame (4) is a fixed end and the other end is a sliding end, and the fixed ends of the two symmetrical support frames (4) are located on the left and right sides of the rotation shaft (3), and the two symmetrical support frames (4) are arranged on the left and right sides of the rotation shaft (3). The sliding ends are located on the left and right sides of the rotating shaft (3), and the fixed ends of the support frame (4) are used to be fixed to the bottom surface of the steel section A (1), steel section B (9) or the intermediate steel section (8), and the sliding ends of the support frame (4) and the bottom surface of the steel section B (9), steel section A (1) or the intermediate steel section (8) can slide relative to each other; the fixed end and the sliding end of each support frame (4) are provided with a connecting plate (6), and the connecting plate (6) of the fixed end of one support frame (4) and the connecting plate (6) of the sliding end of another symmetrical support frame (4) are connected by a traction rope (5) bypassing a rotating part, and the connecting plate (6) of the sliding end of one support frame (4) and the connecting plate (6) of the fixed end of another symmetrical support frame (4) are connected by a traction rope (5) bypassing another rotating part; each intermediate steel section (8) always slides relative to the support frame (4) not fixed thereto.

4. A bridge expansion displacement control component, comprising a steel section A (1) and a steel section B (9), wherein the steel section A (1) and the steel section B (9) are respectively fixed to the bridge 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), and the bottom surface of each intermediate steel section (8) is fixedly connected to two rotating shafts (3), the axial direction of the rotating shaft (3) is vertical, and each rotating shaft (3) is connected to a rotating member; multiple sets of support frames (4), traction ropes (5) and connecting plates (6) are provided below the steel section A (1), the intermediate steel section (8) and the steel section B (9), and starting from the steel section A (1) or the steel section B (9), each adjacent three steel sections share one set, and each set of support frames (4) is composed of two groups of four in total. A group of two support frames (4) is symmetrically provided on the front and rear sides of each rotating shaft (3), and 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 symmetrical 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 each symmetrical support frame (4) on the front and rear sides of the rotating shaft (3) supports The sliding ends of the support frame (4) are located on the left and right sides of the rotating shaft (3), and the fixed ends of the support frame (4) are used to be fixed to the bottom surface of the steel section A (1), steel section B (9) or the intermediate steel section (8), and the sliding ends of the support frame (4) and the bottom surface of the steel section B (9), steel section A (1) or the intermediate steel section (8) can slide relative to each other; the fixed end and the sliding end of each support frame (4) are provided with a connecting plate (6), and the connecting plate (6) of the sliding end of one support frame (4) in one group is connected to the connecting plate (6) of the fixed end of another support frame (4) symmetrical in the same group by a traction rope (5) bypassing a rotating part on one rotating shaft (3), and the connecting plate (6) of the fixed end of one support frame (4) in another group is connected to the connecting plate (6) of the sliding end of another support frame (4) symmetrical in the same group by a traction rope (5) bypassing a rotating part on another rotating shaft (3); each intermediate steel section (8) always slides relative to the support frame (4) not fixed thereto.

5. The bridge expansion and contraction displacement control component according to claim 3 or 4, characterized in that: The number of sets of the support frame (4), the traction rope (5) and the connecting plate (6) is N, which can control the width of N+1 expansion joints between the steel sections A (1), steel sections B (9) and the intermediate steel sections (8), which have a total number of N+2.

6. The bridge telescopic 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 section steel A (1), the section steel B (9) and the intermediate section steel (8).

7. The bridge telescopic 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 mounted on a rotating shaft (3); the upper end of the rotating shaft (3) is fixedly connected to an intermediate steel section (8); the lower end of the rotating shaft (3) is threadedly connected to a nut (7) for pressing the rotating sleeve (2) or the pulley; a groove is provided on the rotating sleeve (2) along the circumferential direction.

8. The bridge telescopic 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 telescopic 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 direction of the steel section A (1), the intermediate steel section (8) or the steel section B (9).

10. A method for controlling the installation of a bridge telescopic displacement control component according to any one of claims 1 to 4, characterized in that: The installation includes the following steps Step A, placing an intermediate steel section (8) between the steel section A (1) and the steel section B (9), and determining the number of sets of the support frame (4), the traction rope (5) and the connecting plate (6) according to the number of the intermediate steel sections (8); Step B, arranging the support frame (4) vertically with the steel section A (1), the steel section B (9) and the intermediate steel section (8), and fixing the fixed end of the support frame (4) to the steel section A (1), the steel section B (9) or the intermediate steel section (8); Step C, fixing connecting plates (6) to the lower surfaces of the fixed end and the sliding end of the support frame (4); Step D, arranging a rotating shaft (3) between the two symmetrical support frames (4), and fixing the rotating shaft (3) on the middle steel (8); Step E, installing a rotating member on the rotating shaft (3); Step F, passing the traction rope (5) around the rotating member, and fixing the two ends of the traction rope (5) to the connecting plates (6) on the same side of the two symmetrical support frames (4); Step G, after the bridge expansion and contraction displacement control components are assembled, the steel section A (1) and the steel section B (9) are positioned on the bridge at both sides of the expansion joint and fixed; After installation, when the width of the expansion joint between each single module of the modular expansion joint device changes, the sliding end of the support frame (4) slides relative to the steel section A (1), steel section B (9) or the intermediate steel section (8), and the intermediate steel section (8) located between the steel section A (1) and the steel section B (9) slides left and right on the support frame (4) through the action of the traction rope (5), thereby making the width of the joint between the steel section A (1) and the intermediate steel section (8), the width of the joint between the steel section B (9) and the intermediate steel section (8), and the width of the joint between adjacent intermediate steel sections (8) uniform and equal.

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