Bracket prepressing device

Abstract

The utility model discloses a bracket pre-pressing device. The bracket pre-pressing device comprises a pier bracket, an L-shaped bracket, a reinforcing assembly, a sliding plate, a fixing rod, a pressurizing assembly, a top plate and an adjusting assembly. The bridge pier brackets are mounted on the side wall of the bridge pier body, and the multiple bridge pier brackets are mounted in the circumferential direction of the bridge pier body at intervals; the top plate is installed on the top face of the pier body through the adjusting assemblies. The pressurizing assembly is installed on the top plate. The multiple L-shaped brackets are attached to the side wall of the pier body, the bottoms of the vertical sections of the multiple L-shaped brackets abut against the multiple pier brackets, and each L-shaped bracket is fixedly connected with the pier body through a reinforcing assembly. The horizontal section of each L-shaped bracket is slidably provided with a sliding plate, the sliding plates are fixedly connected with the lower ends of the fixing rods, and the upper portions of the fixing rods are adjustably connected with the pressurizing assembly. The utility model relates to the technical field of bridge construction, and can solve the problems that in the prior art, a heavy object prepressing bracket is time-consuming, labor-consuming, low in efficiency and limited to the construction environment.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a bracket preloading device. Background Art

[0002] A continuous beam refers to a beam with three or more supports in projects such as buildings, bridges, aviation, and pipelines. A continuous beam has an intermediate support, so its deformation and internal force are usually smaller than those of a single-span beam. Therefore, it is widely used in engineering structures (such as bridges) and machinery. During the construction of a continuous beam, the bridge piers are cast first, and then the continuous beam is cast symmetrically. When casting symmetrically, a bracket must first be set up on the cast piers, and the bottom of the bracket must be placed against the corbel.

[0003] After the bracket is installed, there is a certain gap between the bracket and parts such as the corbel, so the bracket needs to be pre-pressed after it is erected. At present, most conventional bracket pre-pressing methods use heavy objects, which require the heavy objects to be carried to the top of the bracket. The construction workers consume a lot of physical energy, and the operation is time-consuming and labor-intensive, which affects the construction efficiency, and it cannot be carried out in an environment with limited construction space. Therefore, it is necessary to provide a bracket pre-pressing device that can solve the problems in the prior art of using heavy objects to pre-press the bracket, which is time-consuming, labor-intensive, inefficient, and limited by the construction environment. Summary of the invention

[0004] The utility model aims to provide a bracket pre-pressing device, which can solve the problems in the prior art of using heavy objects to pre-press the bracket, which is time-consuming, labor-intensive, inefficient and limited by the construction environment.

[0005] The utility model is achieved in this way:

[0006] A bracket pre-stressing device comprises a pier corbel, an L-shaped bracket, a reinforcement assembly, a sliding plate, a fixing rod, a pressurizing assembly, a top plate and an adjusting assembly; the pier corbel is mounted on the side wall of the pier body, and a plurality of pier corbels are installed at intervals along the circumference of the pier body; the top plate is mounted on the top surface of the pier body through a plurality of groups of adjusting assemblies, and the pressurizing assembly is mounted on the top plate; a plurality of L-shaped brackets are respectively fitted on the side wall of the pier body, and the bottoms of the vertical sections of the plurality of L-shaped brackets are respectively pressed against the plurality of pier corbels, and each L-shaped bracket can be connected and fixed to the pier body through the reinforcement assembly; a sliding plate is slidably mounted on the horizontal section of each L-shaped bracket, the sliding plate is fixedly connected to the lower end of the fixing rod, and the upper parts of the plurality of fixing rods are respectively adjustably connected to the pressurizing assembly.

[0007] The pressurizing assembly includes a first threaded rod, a first pulley, a belt and a rotating mechanism; the middle parts of several first threaded rods are rotatably inserted through the top plate, the upper parts of several fixed rods are formed with a screw barrel part, and the lower parts of several first threaded rods are respectively matched and screwed with the screw barrel parts of several fixed rods; the upper parts of several first threaded rods extend to the top of the top plate and are coaxially fixed with the first pulley, and several first pulleys are respectively connected to the rotating mechanism through belts; the rotating mechanism is installed in the middle of the top surface of the top plate, and several first threaded rods are circumferentially distributed on the top outer side of the pier body.

[0008] The rotating mechanism comprises a fixed box, a motor, a second pulley, a first rotating column, a first gear, a second gear and a second rotating column; the fixed box is fixedly mounted at the center of the top surface of the top plate, the motor is fixedly mounted at the center of the bottom surface of the top plate, the output shaft of the motor passes through the top plate and the bottom plate of the fixed box and is coaxially fixedly connected to the lower end of the first rotating column; the upper end of the first rotating column is rotatably mounted in the fixed box, and the first gear is coaxially mounted on the first rotating column; a plurality of second rotating columns are rotatably mounted in the fixed box respectively and distributed around the first rotating column, and a plurality of second rotating columns are coaxially mounted with second gears and second pulleys; a plurality of second gears are meshedly connected around the first gear, and belts connected to a plurality of first pulleys pass through the side plates of the fixed box respectively and are transmission-connected to a plurality of second pulleys.

[0009] Each group of the adjusting components comprises a second threaded rod, a first nut and a supporting and fixing block; the lower end of the second threaded rod is detachably mounted on the top of the pier body, the supporting and fixing block is fixedly arranged on the second threaded rod and is located above the top surface of the pier body; a through hole is reserved on the top plate for the second threaded rod to pass through, the upper part of the second threaded rod passes through the top plate, so that the bottom surface of the top plate is placed on the supporting and fixing blocks of several groups of adjusting components; the first nut is matched and screwed on the second threaded rod and pressed against the top surface of the top plate.

[0010] The reinforcement assembly includes a support frame, a third threaded rod, a second nut and a third nut; both ends of the support frame are bent to form mounting portions, and the mounting plates at both ends of the support frame are respectively fixedly mounted on the L-shaped bracket, so that the support frame is tilted and supported between the horizontal section and the vertical section of the L-shaped bracket; one end of the third threaded rod passes through the vertical section and is anchored in the pier body, and the other end of the third threaded rod passes through the support frame; the second nut and the third nut are respectively screwed on the third threaded rod, and the second nut abuts against a side surface of the vertical section of the L-shaped bracket away from the pier body, and the third nut abuts against a side surface of the support frame facing the vertical section of the L-shaped bracket.

[0011] The third threaded rod is arranged horizontally, and a fixing block is sleeved on the third threaded rod. One side surface of the fixing block is a wedge-shaped surface and matches and fits on a side surface of the support frame facing the vertical section of the L-shaped bracket. The other side surface of the fixing block is located in a vertical plane, so that the third nut abuts against the other side surface of the fixing block.

[0012] A slide groove is formed on the horizontal section of the L-shaped bracket, and the sliding plate can be slidably inserted in the slide groove; latch holes are formed at intervals on the slide groove and the sliding plate, and the latch passes through the latch hole to connect the sliding plate and the horizontal section of the L-shaped bracket.

[0013] The reinforcement assembly also includes a steel cable, which is connected between a plurality of L-shaped brackets and tied to the outer side wall of the pier body.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model is provided with a fixing rod and a pressurizing assembly, and the first threaded rod is driven to rotate by a rotating mechanism, and the fixing rod is displaced downward by thread transmission, so that the fixing rod forms a downward pressure on the L-shaped bracket, thereby achieving the purpose of pre-pressing the L-shaped bracket and reducing the gap between the L-shaped bracket and the bridge pier bracket. The driving force is provided by a motor, and there is no need to carry heavy objects upward. The operation is simple, time-saving and labor-saving, and the disassembly and assembly are convenient, which is conducive to improving the pre-pressing and installation efficiency of the L-shaped bracket and can reduce the space requirement above the L-shaped bracket.

[0016] 2. The utility model is provided with a reinforcement component, which improves the structural stability of the L-shaped bracket through the support frame, and can ensure the installation stability of the L-shaped bracket on the pier body through the steel cable, and further improve the installation stability of the L-shaped bracket on the pier body through the third threaded rod through the second nut and the third nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an installation sectional view of the bracket preloading device of the utility model;

[0018] Figure 2 It is a front view of an L-shaped bracket and a reinforcement component in the bracket preloading device of the utility model;

[0019] Figure 3 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0020] Figure 4 The utility model is a structural schematic diagram of an L-shaped bracket and a sliding plate in a bracket pre-pressing device.

[0021] In the figure, 1, pier body; 2, first bolt; 3, pier corbel; 4, L-shaped bracket; 5, support frame; 6, sliding plate; 7, fixing rod; 8, first threaded rod; 9, first pulley; 10, belt; 11, fixing box; 12, second threaded rod; 13, first nut; 14, supporting fixing block; 15, motor; 16, third threaded rod; 17, second nut; 18, latch; 19, fixing block; 20, third nut; 21, second bolt; 22, second pulley; 23, first rotating column; 24, first gear; 25, second gear; 26, second rotating column; 27, slide groove; 28, latch hole; 29, top plate; 30, rotating mechanism; 31, steel cable. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Please see attached Figure 1 A bracket pre-stressing device comprises a pier corbel 3, an L-shaped bracket 4, a reinforcement assembly, a sliding plate 6, a fixing rod 7, a pressurizing assembly, a top plate 29 and an adjusting assembly; the pier corbel 3 is mounted on the side wall of the pier body 1 by a first bolt 2, and a plurality of pier corbels 3 are installed at intervals along the circumference of the pier body 1; the top plate 29 is mounted on the top surface of the pier body 1 by a plurality of groups of adjusting assemblies, and the pressurizing assembly is mounted on the top plate 29; a plurality of L-shaped brackets 4 are respectively fitted on the side wall of the pier body 1, and the bottoms of the vertical sections of the plurality of L-shaped brackets 4 are respectively pressed against the plurality of pier corbels 3, and each L-shaped bracket 4 can be connected and fixed to the pier body 1 by a reinforcement assembly; a sliding plate 6 is slidably mounted on the horizontal section of each L-shaped bracket 4, the sliding plate 6 is fixedly connected to the lower end of the fixing rod 7, and the upper parts of the plurality of fixing rods 7 are respectively adjustably connected to the pressurizing assembly.

[0024] The pier corbel 3 is installed on the pier body 1 in a conventional manner so that the L-shaped bracket 4 can be placed on the pier corbel 3. The pier corbel 3 and the L-shaped bracket 4 are usually symmetrically arranged. The pressure component provides downward pressure on the horizontal section of the L-shaped bracket 4 through the fixing rod 7, which is used to form a pre-pressure on the L-shaped bracket 4 and reduce the gap between the L-shaped bracket 4 and the pier corbel 3.

[0025] The sliding plate 6 is used to adapt to the installation position of the fixing rod 7 to ensure that the fixing rod 7 can generate effective pre-pressure on the L-shaped bracket 4; the pressure component is set on the top of the pier body 1 through the top plate 29 and the adjustment component to ensure the installation stability of the pressure component and ensure that the fixing rod 7 can effectively press down the L-shaped bracket 4.

[0026] Please see attached Figure 1The pressurizing assembly includes a first threaded rod 8, a first pulley 9, a belt 10 and a rotating mechanism 30; the middle parts of several first threaded rods 8 rotatably penetrate the top plate 29 through a rotating bearing, the upper parts of several fixed rods 7 are formed with a screw barrel part, and the lower parts of several first threaded rods 8 are respectively matched and screwed with the screw barrel parts of several fixed rods 7; the upper parts of several first threaded rods 8 extend to the top of the top plate 29 and are coaxially fixed with the first pulley 9, and several first pulleys 9 are respectively connected to the rotating mechanism 30 through the belt 10; the rotating mechanism 30 is installed in the middle of the top surface of the top plate 29, and several first threaded rods 8 are circumferentially distributed on the top outer side of the pier body 1.

[0027] The number of the first pulleys 9, the number of the fixed rods 7 and the number of the first threaded rods 8 are all determined according to the number of the L-shaped brackets 4. The first pulleys 9 are driven by the rotating mechanism 30 through the belt 10 to rotate, and drive the first threaded rods 8 to rotate synchronously. The threaded transmission connection between the fixed rod 7 and the first threaded rod 8 is used to convert the rotation of the first threaded rod 8 into the axial linear motion of the fixed rod 7, that is, the lifting motion.

[0028] When the first threaded rod 8 drives the fixing rod 7 to move downward, the fixing rod 7 forms a downward pre-pressure on the L-shaped bracket 4, thereby pre-pressing the L-shaped bracket 4. When the first threaded rod 8 drives the fixing rod 7 to move upward, the fixing rod 7 is away from the L-shaped bracket 4, which is convenient for disassembly after the pre-pressing is completed.

[0029] Please see attached Figure 1 and attached Figure 3 The rotating mechanism 30 includes a fixed box 11, a motor 15, a second pulley 22, a first rotating column 23, a first gear 24, a second gear 25 and a second rotating column 26; the fixed box 11 is fixedly mounted on the top center of the top plate 29, the motor 15 is fixedly mounted on the bottom center of the top plate 29, the output shaft of the motor 15 passes through the top plate 29 and the bottom plate of the fixed box 11 and is coaxially fixedly connected with the lower end of the first rotating column 23; the upper end of the first rotating column 23 is rotatably mounted at the center of the inner wall of the top plate of the fixed box 11 through a rotating bearing, and the first gear 24 is coaxially mounted on the first rotating column 23; a plurality of second rotating columns 26 are rotatably mounted in the fixed box 11 through rotating bearings and distributed around the first rotating column 23, and a plurality of second rotating columns 26 are coaxially mounted with the second gear 25 and the second pulley 22; a plurality of second gears 25 are meshed and connected around the first gear 24, and the belts 10 connected to the plurality of first pulleys 9 pass through the side plates of the fixed box 11 and are transmission-connected with the plurality of second pulleys 22.

[0030] Preferably, the number of belts 10, the number of second gears 25 and the number of second rotating columns 26 are determined according to the number of L-shaped brackets 4. The motor 15 should be a motor with a bidirectional rotation function in the prior art, which is convenient for pre-pressing and disassembly.

[0031] When the motor 15 is started, the first rotating column 23 and the first gear 24 are driven to rotate synchronously through the output shaft, and the first gear 24 synchronously meshes and transmits the two first gears 24, so that the two second rotating columns 26 rotate synchronously and drive the two second pulleys 22 to rotate, thereby driving the two first pulleys 9 to rotate synchronously through the belt 10, and then the two first threaded rods 8 are rotated synchronously through the two first pulleys 9.

[0032] When selecting the first pulley 9, belt 10 and second pulley 22, the pulley group can be selected according to the actual transmission requirements, for example: using friction to achieve transmission, using meshing teeth to achieve transmission, etc., to ensure that there is no slip between the first pulley 9, belt 10 and second pulley 22.

[0033] Please see attached Figure 1 Each group of the adjustment components includes a second threaded rod 12, a first nut 13 and a support and fixing block 14; the lower end of the second threaded rod 12 is detachably mounted on the top of the pier body 1, and the support and fixing block 14 is fixedly arranged on the second threaded rod 12 and is located above the top surface of the pier body 1; a through hole (not shown in the figure) is reserved on the top plate 29 for the second threaded rod 12 to pass through, and the upper part of the second threaded rod 12 passes through the top plate 29, so that the bottom surface of the top plate 29 is placed on the support and fixing blocks 14 of several groups of adjustment components; the first nut 13 is matched and screwed on the second threaded rod 12 and pressed against the top surface of the top plate 29.

[0034] The second threaded rod 12 can be installed by pre-embedded threaded sleeve on the top of the pier body 1, so that the second threaded rod 12 and the threaded sleeve can be detachably screwed, which is convenient for disassembly and assembly and firmly installed. The support and fixing block 14 can be a metal block and welded to the middle of the second threaded rod 12, used to support the top plate 29, screw the first nut 13 onto the second threaded rod 12 and press the top plate 29, so as to ensure the top plate 29 is stably arranged between the first nut 13 and the support and fixing block 14 above the pier body 1, so that the pressurizing assembly can stably pressurize the fixing rod 7.

[0035] Please see attached Figure 2The reinforcement assembly includes a support frame 5, a third threaded rod 16, a second nut 17 and a third nut 20; both ends of the support frame 5 are bent to form a mounting portion (not shown in the figure), and the mounting plates at both ends of the support frame 5 are fixedly mounted on the L-shaped bracket 4 by second bolts 21, so that the support frame 5 is tilted and supported between the horizontal section and the vertical section of the L-shaped bracket 4; one end of the third threaded rod 16 passes through the vertical section and is anchored in the pier body 1, and the other end of the third threaded rod 16 passes through the support frame 5; the second nut 17 and the third nut 20 are respectively screwed on the third threaded rod 16, and the second nut 17 abuts against a side surface of the vertical section of the L-shaped bracket 4 away from the pier body 1, and the third nut 20 abuts against a side surface of the vertical section of the L-shaped bracket 4 facing the vertical section of the L-shaped bracket 4.

[0036] After the pre-stressing is completed, the support frame 5 and the L-shaped bracket 4 can be reinforced by drilling and screwing in the third threaded rod 16, so that the L-shaped bracket 4 can be reliably fixed on the pier body 1. At the same time, by tightening the second nut 17, the vertical section of the L-shaped bracket 4 is pressed against the pier body 1, and by tightening the third nut 20, it is pressed against the middle part of the support frame 5. The third threaded rod 16 is used to form a reaction force on the L-shaped bracket 4, thereby improving the installation reliability of the L-shaped bracket 4 on the pier body 1, and also providing stable support for the vertical and horizontal sections of the L-shaped bracket 4.

[0037] Please see attached Figure 2 The third threaded rod 16 is horizontally arranged, and a fixing block 19 is sleeved on the third threaded rod 16. One side of the fixing block 19 is a wedge-shaped surface and matches and fits on the side surface of the support frame 5 facing the vertical section of the L-shaped bracket 4. The other side of the fixing block 19 is located in the vertical plane, so that the third nut 20 abuts against the other side of the fixing block 19.

[0038] Since the support frame 5 is tilted and the third threaded rod 16 is horizontally arranged, the third nut 20 cannot fit the surface of the support frame 5, which may affect the connection reliability between the third threaded rod 16 and the support frame 5. By setting the fixing block 19, the wedge surface and the vertical surface of the fixing block 19 are respectively adapted to the support frame 5 and the third nut 20, thereby ensuring the reliable connection between the third threaded rod 16 and the support frame 5, and further ensuring the installation reliability of the L-shaped bracket 4 on the pier body 1.

[0039] Please see attached Figure 4 A slide groove 27 is formed on the horizontal section of the L-shaped bracket 4, and the sliding plate 6 can be slidably inserted in the slide groove 27; pin holes 28 are formed at intervals on the slide groove 27 and the sliding plate 6, and the pin 18 passes through the pin hole 28 to connect the sliding plate 6 and the horizontal section of the L-shaped bracket 4.

[0040] By setting the slide groove 27, the horizontal position of the sliding plate 6 can be adjusted, and by the cooperation of the latch 18 and the latch hole 28, the downward pressure of the fixing rod 7 can be evenly transmitted to the L-shaped bracket 4 through the sliding plate 6, thereby playing a reliable pre-compression role, and at the same time, it can also meet the pre-compression requirements of the L-shaped bracket 4 on the pier body 1 of different sizes.

[0041] Please see attached Figure 1 The reinforcement assembly also includes a steel cable 31 , which is connected between a plurality of L-shaped brackets 4 and tied to the outer side wall of the pier body 1 .

[0042] Preferably, perforated ear plates can be formed on both sides of the L-shaped bracket 4 for connecting the steel cable 31. The steel cable 31 can be fixed to the pier body 1 by bundling to improve the installation reliability of the L-shaped bracket 4 on the pier body 1.

[0043] Please see attached Figure 1 To Attachment Figure 4 , the working process and working principle of the utility model are:

[0044] The staff first uses the first bolt 2 to symmetrically fix a pair of pier corbels 3 on both sides of the pier body 1, and then uses the steel cable 31 to symmetrically fix a pair of L-shaped brackets 4 on both sides of the pier body 1, and abuts the bottom of the vertical sections of the pair of L-shaped brackets 4 against the top of the pier corbels 3.

[0045] The mounting parts at both ends of the support frame 5 are fixed to the horizontal section and the vertical section of the L-shaped bracket 4 by two second bolts 21, so as to provide inclined auxiliary support for the horizontal section and the vertical section of the L-shaped bracket 4 and stabilize its overall structure.

[0046] Slide the sliding plate 6 at the bottom end of the fixing rod 7 into the sliding groove 27, and after sliding to a suitable position, insert the latch 18 into the latch hole 28 at the corresponding position, so that the sliding plate 6 cannot move in the sliding groove 27, so that the sliding plate 6 is cantilevered on both sides of the pier body 1, which is used to provide a support point for the installation and force transmission of the fixing rod 7.

[0047] The two second threaded rods 12 are symmetrically mounted on the top of the pier body 1, the top plate 29 is sleeved on the second threaded rods 12 through the through holes and placed on two supporting fixing blocks 14, the two first nuts 13 are screwed onto the two second threaded rods 12 through thread matching and pressed onto the top surface of the top plate 29, so that the top plate 29 is horizontally arranged above the top of the pier body 1.

[0048] The two first threaded rods 8 are installed through the top plate 29 , and the lower ends of the two first threaded rods 8 are matched and screwed to the bottoms of the threaded holes on the upper parts of the two fixing rods 7 .

[0049] During pre-stressing, the motor 15 is started, and the first rotating column 23 and the first gear 24 thereon are driven to rotate synchronously through the output shaft of the motor 15. The two second gears 25 are meshed and driven by the first gear 24, and the two second gears 25 respectively drive the two second rotating columns 26 and the second belt pulleys 22 thereon to rotate synchronously. The two second belt pulleys 22 respectively drive the two first belt pulleys 9 through the two belts 10, thereby synchronously driving the two first threaded rods 8 through the two first belt pulleys 9.

[0050] When the thread is turned, the rotation of the first threaded rod 8 is converted into the axial movement of the fixed rod 7, so that the two fixed rods 7 are synchronously displaced downward, forming a pre-pressure on the sliding plate 6 and the L-shaped bracket 4, and gradually reducing the gap between the L-shaped bracket 4 and the pier bracket 3.

[0051] After the pre-stressing is completed, the third threaded rod 16 is passed through the vertical sections of the support plate 5 and the L-shaped bracket 4 and is screwed and anchored into the pier body 1. In order to avoid interference between the second nut 17 and the third nut 20 and the support plate 5, when installing the second nut 17 and the third nut 20, the support plate 5 can also be temporarily removed, or the support plate 5 can be installed last.

[0052] The second nut 17 is rotated to tighten the vertical section of the L-shaped bracket 4 against the side wall of the pier body 1, and the third nut 20 is rotated to tighten the fixing block 19 against the support plate 5, providing a force in the direction away from the pier body 1 to the middle part of the support plate 5, so that the mounting parts at both ends of the support plate 5 apply forces upward and toward the pier body 1 to the vertical section and horizontal section of the L-shaped bracket 4, respectively, to ensure the installation stability of the L-shaped bracket 4 on the pier body 1 and the structural stability of the L-shaped bracket 4.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bracket preloading device, characterized in that: The invention comprises a pier bracket (3), an L-shaped bracket (4), a reinforcement component, a sliding plate (6), a fixing rod (7), a pressurizing component, a top plate (29) and an adjusting component; the pier bracket (3) is installed on the side wall of the pier body (1), and a plurality of pier brackets (3) are installed at intervals along the circumference of the pier body (1); the top plate (29) is installed on the top surface of the pier body (1) through a plurality of groups of adjusting components, and the pressurizing component is installed on the top plate (29); a plurality of L-shaped brackets (4) are installed at a plurality of groups of adjusting components. The plurality of L-shaped brackets (4) are respectively fitted and installed on the side wall of the pier body (1), and the bottoms of the vertical sections of the plurality of L-shaped brackets (4) are respectively pressed against the plurality of pier brackets (3), and each L-shaped bracket (4) can be connected and fixed to the pier body (1) through a reinforcement component; a sliding plate (6) is slidably installed on the horizontal section of each L-shaped bracket (4), and the sliding plate (6) is fixedly connected to the lower end of the fixing rod (7), and the upper parts of the plurality of fixing rods (7) are respectively adjustably connected to the pressure components.

2. The bracket preloading device according to claim 1 is characterized in that: The pressurizing assembly comprises a first threaded rod (8), a first pulley (9), a belt (10) and a rotating mechanism (30); the middle parts of a plurality of first threaded rods (8) are rotatably inserted through the top plate (29); the upper parts of a plurality of fixed rods (7) are each formed with a screw barrel part; the lower parts of a plurality of first threaded rods (8) are respectively matched and screwed with the screw barrel parts of a plurality of fixed rods (7); the upper parts of a plurality of first threaded rods (8) extend to the top of the top plate (29) and are coaxially fixedly connected with the first pulley (9); the plurality of first pulleys (9) are respectively connected to the rotating mechanism (30) through the belt (10); the rotating mechanism (30) is installed in the middle of the top surface of the top plate (29), and the plurality of first threaded rods (8) are circumferentially distributed on the top outer side of the pier body (1).

3. The bracket preloading device according to claim 2 is characterized in that: The rotating mechanism (30) comprises a fixed box (11), a motor (15), a second pulley (22), a first rotating column (23), a first gear (24), a second gear (25) and a second rotating column (26); the fixed box (11) is fixedly mounted at the center of the top surface of the top plate (29); the motor (15) is fixedly mounted at the center of the bottom surface of the top plate (29); the output shaft of the motor (15) passes through the top plate (29) and the bottom plate of the fixed box (11) and is coaxially fixedly connected to the lower end of the first rotating column (23); the upper end of the first rotating column (23) is rotatably mounted on the fixed box (29); 11), a first gear (24) is coaxially mounted on a first rotating column (23); a plurality of second rotating columns (26) are rotatably mounted in a fixed box (11) and distributed around the first rotating column (23), and a second gear (25) and a second belt pulley (22) are coaxially mounted on the plurality of second rotating columns (26); a plurality of second gears (25) are meshedly connected around the first gear (24), and a belt (10) connected to a plurality of first belt pulleys (9) respectively passes through a side plate of the fixed box (11) and is transmission-connected to a plurality of second belt pulleys (22).

4. The bracket preloading device according to claim 1 is characterized in that: Each group of the adjusting components comprises a second threaded rod (12), a first nut (13) and a supporting and fixing block (14); the lower end of the second threaded rod (12) is detachably mounted on the top of the pier body (1), and the supporting and fixing block (14) is fixedly arranged on the second threaded rod (12) and is located above the top surface of the pier body (1); a through hole is reserved on the top plate (29) for the second threaded rod (12) to pass through, and the upper part of the second threaded rod (12) passes through the top plate (29), so that the bottom surface of the top plate (29) rests on the supporting and fixing blocks (14) of the plurality of groups of adjusting components; the first nut (13) is matched and screwed on the second threaded rod (12) and pressed against the top surface of the top plate (29).

5. The bracket preloading device according to claim 1, characterized in that: The reinforcement assembly comprises a support frame (5), a third threaded rod (16), a second nut (17) and a third nut (20); both ends of the support frame (5) are bent to form mounting portions, and the mounting plates at both ends of the support frame (5) are respectively fixedly mounted on the L-shaped bracket (4), so that the support frame (5) is tilted and supported between the horizontal section and the vertical section of the L-shaped bracket (4); one end of the third threaded rod (16) passes through the vertical section and is anchored in the pier body (1), and the other end of the third threaded rod (16) passes through the support frame (5); the second nut (17) and the third nut (20) are respectively screwed on the third threaded rod (16), and the second nut (17) abuts against a side surface of the vertical section of the L-shaped bracket (4) away from the pier body (1), and the third nut (20) abuts against a side surface of the vertical section of the L-shaped bracket (4) facing the vertical section of the L-shaped bracket (4).

6. The bracket preloading device according to claim 5, characterized in that: The third threaded rod (16) is arranged horizontally, and a fixing block (19) is sleeved on the third threaded rod (16). One side surface of the fixing block (19) is a wedge-shaped surface and matches and fits on a side surface of the support frame (5) facing the vertical section of the L-shaped bracket (4). The other side surface of the fixing block (19) is located in a vertical plane, so that the third nut (20) abuts against the other side surface of the fixing block (19).

7. The bracket preloading device according to claim 1 is characterized in that: A slide groove (27) is formed on the horizontal section of the L-shaped bracket (4), and the sliding plate (6) can be slidably inserted in the slide groove (27); latch holes (28) are formed at intervals on the slide groove (27) and the sliding plate (6), and the latch (18) passes through the latch hole (28) to connect the sliding plate (6) and the horizontal section of the L-shaped bracket (4).

8. The bracket preloading device according to claim 5, characterized in that: The reinforcement assembly further comprises a steel cable (31), which is connected between a plurality of L-shaped brackets (4) and is tied to the outer side wall of the pier body (1).

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