Prefabricated box girder expansion joint elevation control and fixing device

Abstract

The utility model discloses a prefabricated box girder expansion joint elevation control and fixing device, which mainly comprises a connecting plate, a bearing beam, two fixed pulleys and two take-up devices, is connected with an expansion joint main body through the connecting plate, and slowly lifts the connecting plate and an expansion joint through ropes of the take-up devices, so that the expansion joint can be fixed on the bearing beam. Meanwhile, the elevation control precision of the expansion joint main body is high through the positioning rod, and the expansion joint main body is temporarily fixed through the limiting rod and the rope, so that the temporary fixation of the expansion joint main body is stable, the expansion joint main body can be recycled, and the construction cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge construction, and in particular to a device for controlling and fixing the elevation of expansion joints in precast box girders. Background Technology

[0002] When constructing bridges using precast box girders, expansion joints are installed between adjacent box girders to ensure the bridge's future use and meet the requirements of pavement deformation. During the construction of these expansion joints, the elevation of the main body of the joint must be controlled so that its top surface is lower than the asphalt pavement of the bridge, thus accommodating wear and tear over long-term use.

[0003] In existing technologies, the main body of an expansion joint typically includes two opposing irregularly shaped steel sections and an anchoring structure located beneath them. When controlling the elevation of the expansion joint, workers need to use a ruler to measure the height and use components such as angle iron to elevate the main body of the expansion joint, ensuring the height of the expansion device meets requirements. However, some issues still need improvement during implementation:

[0004] 1. Using measuring tools such as rulers to measure the height, and using components such as angle iron to adjust the height of the expansion joint body, is not only inaccurate but also inefficient.

[0005] 2. Angle steel is placed under the expansion joint. After the fixed anchor bars of the expansion joint are welded and fixed to the pre-embedded anchor bars of the bridge, the angle steel cannot be removed, which makes it impossible to reuse the angle steel, resulting in high costs. Furthermore, during welding, the main body of the expansion joint does not have a temporary fixing structure, which may cause the main body of the expansion joint to shift during installation, affecting the final installation effect.

[0006] Therefore, there is an urgent need for an expansion joint elevation control and fixing device, which can accurately control the elevation of the expansion joint body, temporarily fix the expansion joint body, and be reusable. Utility Model Content

[0007] The purpose of this utility model is to provide a device for controlling and fixing the elevation of expansion joints in precast box girders, in order to solve the above-mentioned technical problems.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A precast box girder expansion joint elevation control and fixing device includes: a connecting plate, detachably connected to the top surface of two irregular steel sections of the expansion joint body, with the lower surface of the connecting plate abutting and fitting against the upper surface of the irregular steel sections; a load-bearing beam, adopting a U-shaped structure, including a base plate and side plates oppositely arranged on both sides of the upper surface of the base plate, with the two ends of the lower surface of the base plate respectively set on the paved surfaces on both sides of the expansion joint, and both ends of the lower surface of the base plate abutting and fitting against the paved surfaces on both sides of the expansion joint; two fixed pulleys, symmetrically arranged on the upper surface of the base plate, with the two sides of the fixed pulleys parallel to the two side sections respectively and connected by a rotating shaft; and two cable take-ups, symmetrically arranged at both ends of the upper surface of the base plate, with the ropes of the two cable take-ups entering the fixed pulleys near the two cable take-ups in a horizontal direction, passing through the base plate in a direction perpendicular to the base plate, and connected to both ends of the upper surface of the connecting plate, with both the upper and lower surfaces of the connecting plate being flush with the base plate, and the two cable take-ups starting and closing simultaneously.

[0010] In some embodiments, the base plate has two through holes, which are symmetrically arranged on both sides of the center of the base plate and are axially perpendicular to the base plate. The upper surface of the connecting plate has two connecting holes, and two connecting blocks are symmetrically arranged on both sides of the center of the connecting plate. A limiting rod that can move back and forth relative to the base plate is provided in the through hole. The upper half and lower half of the limiting rod are provided with external threads. The lower ends of the two limiting rods pass through the two through holes respectively and are threadedly connected to the two connecting holes on the upper surface of the connecting plate respectively. The upper half of the limiting rod is provided with a nut, and the lower surface of the nut abuts and fits against the upper surface of the base plate.

[0011] In some embodiments, vertical plates are provided at both ends of the lower surface of the connecting plate. The two vertical plates are arranged opposite each other, and their opposing surfaces abut and fit against the side walls of the upper ends of the two irregular steel sections of the expansion joint body. The vertical plates are provided with rope holes that pass through the vertical plates, and the axial direction is perpendicular to the upper and lower surfaces of the vertical plates. The rope holes are adapted to the rope lines. When the connecting plate and the load-bearing beam are installed, the rope lines of the two take-up devices pass perpendicularly through the bottom plate along the direction of the rope hole axis and are set in the rope holes.

[0012] In some embodiments, a limiting head is provided at one end of the rope, and a limiting hole communicating with the rope hole is provided on the lower side of the rope hole. The limiting hole is adapted to the limiting head, the size of the limiting hole is larger than the size of the rope hole, and the limiting head is disposed in the limiting hole.

[0013] In some embodiments, a screw is provided at the center of the upper surface of the base plate, a touch button is provided at the lower end of the screw, and a prompting element is provided at the upper end. The prompting element is electrically connected to the touch button. The screw is perpendicular to the base plate. When the main body of the expansion joint moves to the elevation position, the touch button abuts against the center of the upper surface of the connecting plate and is opened, and the prompting element issues a prompt.

[0014] In some embodiments, positioning rods are provided on both sides of the screw. The positioning rods are threadedly connected to the base plate and are axially perpendicular to the base plate. When the main body of the expansion joint is displaced to the elevation position, the lower end surface of the positioning rod abuts against and fits against the upper surface of the connecting plate.

[0015] In some embodiments, the axes of the rope, the limiting rod, the positioning rod, and the screw are all parallel to each other and are all located in the plane containing the center line of the short sides at both ends of the upper surface of the base plate.

[0016] In some embodiments, the connecting plate is provided with a plurality of connecting bolts, which are arranged sequentially at intervals along the extension direction of the midline of the short sides at both ends of the upper surface of the bottom plate, and the lower ends of the plurality of connecting bolts are respectively bolted to the upper surfaces of the two irregular steels of the expansion joint body.

[0017] In some embodiments, each of the two vertical plates is provided with two support plates at its lower end. The upper surface of the two support plates abuts and fits against the lower surface of the upper end of the two irregular steels of the expansion joint body, and the side surface abuts and fits against the outer side surface of the middle end of the two irregular steels of the expansion joint body.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] In this invention, the connecting plate is connected to the main body of the expansion joint, and the connecting plate and the expansion joint are slowly lifted by the rope of the take-up device, thereby making it relatively easy to control their elevation.

[0020] Meanwhile, the positioning rods ensure high precision in elevation control, and the limiting rods and ropes provide temporary fixation, making the temporary fixation of the expansion joint body more stable and reusable, thus reducing construction costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a front cross-sectional view of a precast box girder expansion joint elevation control and fixing device according to an embodiment of this application;

[0023] Figure 2 This is a front view of a precast box girder expansion joint elevation control and fixing device according to an embodiment of this application;

[0024] Figure 3This is a top view of a precast box girder expansion joint elevation control and fixing device according to an embodiment of this application, when a limiting rod is not installed to the load-bearing beam;

[0025] Figure 4 This is a top view of the connection plate, vertical plate, and support plate of a precast box girder expansion joint elevation control and fixing device according to an embodiment of this application, and the main body of the expansion joint.

[0026] Figure 5 This is a bottom view of the connecting plate, vertical plate, and support plate of a precast box girder expansion joint elevation control and fixing device according to an embodiment of this application.

[0027] Figure 6 This is a bottom view of the connecting plate, vertical plate and supporting plate of a precast box girder expansion joint elevation control and fixing device according to an embodiment of this application, along the transverse section of the vertical plate;

[0028] Figure 7 This is a front view of the expansion joint body according to an embodiment of this application;

[0029] Figure label:

[0030] 1-Connecting plate, 11-Connecting hole, 12-Bolt hole

[0031] 2-Expansion joint body, 21-Irregular steel,

[0032] 3-Bearing beam, 31-Base plate, 311-Through hole, 32-Side plate,

[0033] 4- Fixed pulley,

[0034] 5-Spindle,

[0035] 6-Recorder, 61-Rope, 611-Limit head

[0036] 7-Limit rod, 71-Nut

[0037] 8-Vertical plate, 81-Rope hole, 82-Limiting hole

[0038] 9-Screw,

[0039] 10-Touch button,

[0040] 20 - Positioning rod, 21 - Scale mark.

[0041] 30 - Connecting bolt,

[0042] 40-Support plate,

[0043] 50 - Indicator light

[0044] 60 - Warning Speaker

[0045] 70 - Reset button. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0049] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0050] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0051] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0053] It should be understood that when installing expansion joints, using measuring tools such as rulers to measure the height and using components such as angle steel to adjust the height of the expansion joint body 2 is not only less accurate but also less efficient.

[0054] Furthermore, since the angle steel is placed under the expansion joint, it cannot be removed after the fixed anchor bars of the expansion joint are welded and fixed to the pre-embedded anchor bars of the bridge. This makes it impossible to reuse the angle steel, resulting in higher costs. Also, the expansion joint body 2 does not have a temporary fixing structure during welding, which may cause the expansion joint body 2 to shift during installation, affecting the final installation effect.

[0055] To improve the above problems, this embodiment provides a precast box girder expansion joint elevation control and fixing device, which mainly includes a connecting plate 1, a load-bearing beam 3, two fixed pulleys 4 and two take-up devices 6.

[0056] In this embodiment, as Figure 7 As shown, the expansion joint body 2 includes two irregular steel sections 21 and an anchoring structure on the lower side. The irregular steel section 21 has an upper end, a lower end and a middle end, thus forming an I-shaped structure. In this embodiment, the expansion joint body 2 belongs to the prior art and will not be described in detail.

[0057] In this embodiment, the connecting plate 1 adopts a rectangular structure and is detachably connected to the upper surface of the two irregular steels 21 of the expansion joint body 2. The lower surface of the connecting plate 1 abuts against and fits against the upper surface of the irregular steels 21. Specifically, the connecting plate 1 is provided with a plurality of bolt holes 12, which are arranged sequentially at intervals along the extension direction of the center line of the short sides at both ends of the upper surface of the bottom plate 31. The bolt holes 12 are provided with connecting bolts 30. The lower ends of the plurality of connecting bolts 30 are respectively bolted to the upper surfaces of the two irregular steels of the expansion joint body 2, and the number of bolts connected to the two irregular steels 21 is the same, thereby making the connecting plate 1 and the expansion joint body 2 stably connected.

[0058] In this embodiment, vertical plates 8 are provided at both ends of the lower surface of the connecting plate 1. The two vertical plates 8 are arranged opposite each other, and their opposing surfaces abut and fit against the side walls of the upper ends of the two irregular steels of the expansion joint body 2. Two support plates 40 are provided at the lower ends of the two vertical plates 8. The upper surfaces of the two support plates 40 abut and fit against the lower surfaces of the upper ends of the two irregular steels 21 of the expansion joint body 2, and their sides abut and fit against the outer sides of the middle ends of the two irregular steels of the expansion joint body 2. Thus, the connecting plate 1, the two vertical plates 8 and the two support plates 40 form a C-shaped structure, thereby achieving a relatively stable connection with the two irregular steels 21.

[0059] In this embodiment, the load-bearing beam 3 adopts a U-shaped structure. Specifically, the load-bearing beam 3 includes a base plate 31 and two side plates 32 that are disposed opposite each other on the upper surface of the base plate 31. The base plate 31 and the two side plates 32 are both rectangular structures, and the two side plates 32 are perpendicular to the base plate 31. The two ends of the lower surface of the base plate 31 are respectively disposed on the paving surface on both sides of the expansion joint, and the length of the paving surface is the same. The two ends of the lower surface of the base plate 31 abut and fit against the paving surface on both sides of the expansion joint. When elevation control is required, the load-bearing beam 3 spans across the upper side of the expansion joint.

[0060] In this embodiment, two take-up devices 6 are provided on the upper surface of the base plate 31, and the two take-up devices 6 are symmetrically arranged at both ends of the base plate 31 with opposite wire output directions. The take-up devices 6 are existing technology and will not be described in detail.

[0061] In this embodiment, two fixed pulleys 4 are provided on the upper side of the base plate 31, and the axial direction of the two fixed pulleys 4 is perpendicular to the two side plates 32. The two sides of the fixed pulleys 4 are parallel to the two side plates respectively, and both are rotatably connected to the two side plates 32 through the rotating shaft 5.

[0062] In this configuration, the ropes 61 of the two take-up devices 6 enter the fixed pulleys 4 near the two take-up devices 6 in a horizontal direction, and pass through the base plate 31 in a direction perpendicular to the base plate 31, and are connected to both ends of the upper surface of the connecting plate 1. The upper and lower surfaces of the connecting plate 1 are parallel to the base plate 31. When the elevation is controlled, the ropes 61 are taut, and the ropes 61 on the upper side of the base plate 31 are parallel to the upper surface of the base plate 31 and parallel to the center line of the short side at both ends of the upper surface of the base plate 31. The ropes 61 that come out of the fixed pulleys 4 pass through the center line and are perpendicular to the upper surface of the base plate 31.

[0063] The vertical plate 8 is provided with a rope hole 81 that passes through the vertical plate 8, and the axial direction is perpendicular to the upper and lower surfaces of the vertical plate 8. The rope hole 81 is adapted to the rope 61. When the connecting plate 1 and the bearing beam 3 are installed, the ropes 61 of the two take-up devices 6 pass through the bottom plate 31 perpendicularly along the direction of the rope hole 81 axis and are set in the rope hole 81. The rope 61 is perpendicular to the upper surface of the bottom plate 31, so that the rope 61 drives the connecting plate 1 and the expansion joint body 2 to slowly move back and forth in the vertical direction, thereby adjusting the elevation.

[0064] In this embodiment, the two take-up devices 6 are started and stopped simultaneously, and can be controlled by a mobile device. The simultaneous start-up and stopping of the take-up devices 6 is existing technology and will not be described in detail.

[0065] In this embodiment, the base plate 31 has two through holes 311, which are symmetrically arranged on both sides of the center of the base plate 31 and are axially perpendicular to the base plate 31. The upper surface of the connecting plate 1 has two connecting holes 11, and two connecting blocks are symmetrically arranged on both sides of the center of the connecting plate 1. A limiting rod 7 that can move back and forth relative to the base plate 31 is provided in the through hole 311. The upper half and lower half of the limiting rod 7 are provided with external threads. The lower ends of the two limiting rods 7 pass through the two through holes 311 respectively and are threaded to the two connecting holes 11 on the upper surface of the connecting plate 1 respectively. The upper half of the limiting rod 7 is provided with a nut 71, and the lower half of the nut 71 is provided with a nut 71. The surface abuts and fits against the upper surface of the base plate 31. When elevation control is performed, the nut 71 is removed, and the rope 61 drives the connecting plate 1 and the expansion joint body 2 to move to the elevation. During this period, the limiting rod 7 moves along the through hole 311 under the push of the connecting plate 1, thereby limiting the displacement of the connecting plate 1 and the expansion joint body 2, so that the displacement direction of the expansion joint body 2 is stable. After the displacement is completed, the nut 71 is installed on the limiting rod 7 to temporarily fix the expansion joint body 2, thereby stabilizing the position of the expansion joint and avoiding instability in the position of the expansion joint when subsequent processing work is carried out.

[0066] In this embodiment, a limiting head 611 is provided at one end of the rope 61. The limiting head 611 adopts a spherical structure. A limiting hole 82 communicating with the rope hole 81 is provided on the lower side of the rope hole 81. The limiting hole 82 is adapted to the limiting head 611. The size of the limiting hole 82 is larger than the size of the rope hole 81. The limiting head 611 is set in the limiting hole 82, so that the rope 61 can be stably set in the rope hole 81.

[0067] In this embodiment, a screw 9 is provided at the center of the upper surface of the base plate 31. The screw 9 is axially perpendicular to the upper surface of the base plate 31. A touch button 10 is provided at the lower end of the screw 9. Two take-up devices 6 are electrically or wirelessly connected to the touch button 10. When the expansion joint body 2 slowly moves to the elevation position, the touch button 10 abuts against the center of the upper surface of the connecting plate 1, thereby causing the take-up device 6 to stop working and the expansion joint to be at the elevation position.

[0068] In this embodiment, positioning rods 20 are provided on both sides of the screw 9. The positioning rods 20 are threadedly connected to the base plate 31 and are axially perpendicular to the base plate 31. Specifically, the axes of the rope 61, the limiting rod 7, the positioning rod 20 and the screw 9 are all parallel to each other and are all located on the plane of the midline of the short sides at both ends of the upper surface of the base plate 31. The outer wall of the positioning rod 20 is provided with circumferential scale marks 21. Before the take-up device 6 is started, the positioning rod 20 is turned according to the elevation and the thickness of the connecting plate 1, so that the lower end of the positioning rod 20 is lowered to a certain distance, thereby ensuring that the expansion joint is at the elevation position when the positioning rod 20 abuts against the connecting plate 1.

[0069] The precision of the scale mark 21 can be selected according to the precision of the elevation.

[0070] Both the positioning rod 20 and the limiting rod 7 are detachable, allowing for the replacement of positioning rods 20 and limiting rods 7 of different lengths according to actual conditions, and the replacement of positioning rods 20 with different scale accuracies according to the requirements of scale accuracy.

[0071] In this embodiment, when performing elevation control, the connecting plate 1 is first installed on the upper side of the expansion joint body 2, and the load-bearing beam 3 is placed according to the installation requirements. Then, according to the elevation, the positioning rod 20 and the screw 9 are turned so that the positioning rod 20 and the screw 9 descend to a certain distance. Then, the take-up device 6 is started, and the rope 61 drives the connecting plate 1 and the expansion joint body 2 to rise slowly and steadily until the upper surface of the connecting plate 1 abuts against the lower end of the positioning rod 20 and at the same time abuts against the touch button 10. At this time, the take-up device 6 stops running, and the expansion joint body 2 is located at the elevation.

[0072] Depending on the length of the expansion joint and the size of the device, multiple devices can be selected to simultaneously control the elevation and temporarily fix the main body 2 of the expansion joint.

[0073] In some embodiments, the device further includes an indicator light 50 and an indicator horn 60, which are disposed on the surface of one of the cable retractors 6. The indicator light 50 and the indicator horn 60 are electrically or wirelessly connected to the touch button 10. When elevation control is performed, the indicator light 50 and the indicator horn 60 are in the off state. When the connecting rod abuts against the touch button 10, the indicator light 50 and the indicator horn 60 are activated to prompt the construction personnel to complete the elevation control.

[0074] The indicator light 50 and the indicator horn 60 are equipped with a reset button 70 on one side, which is electrically connected to the indicator light 50 and the indicator horn 60. When the indicator horn 60 and the indicator light 50 are activated, they can be reset by the reset button 70, thereby preventing them from continuously emitting an indicator.

Claims

1. A device for controlling and fixing the elevation of expansion joints in precast box girders, characterized in that, include: The connecting plate (1) is detachably connected to the top surface of the two irregular steels (21) of the expansion joint body (2), and the lower surface of the connecting plate (1) abuts against and fits against the upper surface of the irregular steels (21); The load-bearing beam (3) adopts a U-shaped structure. The load-bearing beam (3) includes a base plate (31) and side plates (32) that are disposed opposite to each other on the upper surface of the base plate (31). The two ends of the lower surface of the base plate (31) are respectively disposed on the paving surfaces on both sides of the expansion joint, and the two ends of the lower surface of the base plate (31) abut against and fit against the paving surfaces on both sides of the expansion joint. Two fixed pulleys (4) are symmetrically arranged on the upper side of the base plate (31). The two sides of the fixed pulleys (4) are parallel to the two side plates (32) respectively, and are connected by a rotating shaft (5); and Two take-up reels (6) are symmetrically arranged at both ends of the upper surface of the base plate (31). The ropes (61) of the two take-up reels (6) enter the fixed pulleys (4) near the two take-up reels (6) in the horizontal direction, and pass through the base plate (31) in the direction perpendicular to the base plate (31). They are connected to both ends of the upper surface of the connecting plate (1). The upper and lower surfaces of the connecting plate (1) are connected to the base plate (31). The two take-up reels (6) start and stop simultaneously.

2. The expansion joint elevation control and fixing device according to claim 1, characterized in that: The base plate (31) is provided with two through holes (311), which are symmetrically arranged on both sides of the center of the base plate (31) and are perpendicular to the center of the base plate (31). The upper surface of the connecting plate (1) is provided with two connecting holes (11), and two connecting blocks are symmetrically arranged on both sides of the center of the connecting plate (1). The through holes (311) are provided with limiting rods (7) that can move back and forth relative to the base plate (31). The upper half and lower half of the limiting rods (7) are provided with external threads. The lower ends of the two limiting rods (7) pass through the two through holes (311) respectively and are threadedly connected to the two connecting holes (11) on the upper surface of the connecting plate (1). The upper half of the limiting rods (7) is provided with nuts (71), and the lower surface of the nuts (71) abuts against and fits against the upper surface of the base plate (31).

3. The expansion joint elevation control and fixing device according to claim 2, characterized in that: The two ends of the lower surface of the connecting plate (1) are respectively provided with vertical plates (8). The two vertical plates (8) are arranged opposite each other, and the opposite surfaces abut and fit against the side walls of the two irregular steels of the expansion joint body (2). The vertical plate (8) is provided with a rope hole (81) that passes through the vertical plate (8), and the axial direction is perpendicular to the upper and lower surfaces of the vertical plate (8). The rope hole (81) is adapted to the rope (61). When the connecting plate (1) and the bearing beam (3) are installed, the ropes (61) of the two take-up devices (6) pass through the bottom plate (31) perpendicularly along the direction of the rope hole (81) axis and are set in the rope hole (81).

4. The expansion joint elevation control and fixing device according to claim 3, characterized in that: One end of the rope (61) is provided with a limiting head (611), and the lower side of the rope hole (81) is provided with a limiting hole (82) that communicates with the rope hole (81). The limiting hole (82) is adapted to the limiting head (611). The size of the limiting hole (82) is larger than the size of the rope hole (81), and the limiting head (611) is set inside the limiting hole (82).

5. The expansion joint elevation control and fixing device according to claim 4, characterized in that: A screw (9) is provided at the center of the upper surface of the base plate (31), and a touch button (10) is provided at the lower end of the screw (9). Both of the two take-up devices (6) are electrically or wirelessly connected to the touch button (10). The screw (9) is perpendicular to the base plate (31). When the expansion joint body (2) is moved to the elevation position, the touch button (10) abuts against the center of the upper surface of the connecting plate (1), and the take-up device (6) stops taking up the wire.

6. The expansion joint elevation control and fixing device according to claim 5, characterized in that: The screw (9) is provided with positioning rods (20) on both sides. The positioning rods (20) are threadedly connected to the base plate (31) and are axially perpendicular to the base plate (31). When the expansion joint body (2) is displaced to the elevation position, the lower end surface of the positioning rod (20) abuts against and fits against the upper surface of the connecting plate (1).

7. The expansion joint elevation control and fixing device according to claim 6, characterized in that: The axes of the rope (61), the limiting rod (7), the positioning rod (20), and the screw (9) are all parallel to each other and are all located in the plane where the center line of the short side at both ends of the upper surface of the base plate (31) is located.

8. The expansion joint elevation control and fixing device according to claim 1, characterized in that: The connecting plate (1) is provided with multiple connecting bolts (30), which are arranged sequentially at intervals along the extension direction of the center line of the short sides at both ends of the upper surface of the bottom plate (31). The lower ends of the multiple connecting bolts (30) are respectively bolted to the upper surfaces of the two irregular steels of the expansion joint body (2).

9. The expansion joint elevation control and fixing device according to claim 3, characterized in that: The two vertical plates (8) are provided with two support plates (40) at their lower ends. The upper surfaces of the two support plates (40) abut against and fit against the lower surfaces of the upper ends of the two irregular steels (21) of the expansion joint body (2), and their sides abut against and fit against the outer sides of the middle ends of the two irregular steels of the expansion joint body (2).

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