Box girder prestress tensioning work support device

Abstract

The utility model relates to the technical field of bridge construction, and provides a box girder prestress tensioning working support device which comprises a working support, a servo motor is fixedly connected to the side wall of the working support, a threaded rod is fixedly connected to an output shaft of the servo motor, and the threaded rod is rotationally connected to the inner wall of the top of the working support. The outer wall of the threaded rod is in threaded connection with a moving block, the bottom of the moving block is fixedly connected with a moving plate, the tops of the two sides of the moving plate are fixedly connected with first sliding blocks, sliding grooves are formed in the two sides of the top of the working support, the first sliding blocks are slidably connected to the two sides of the sliding grooves, and the two sides of the inner wall of each first sliding block are rotationally connected with rolling wheels. The inner wall of the bottom of the moving plate is rotationally connected with a bidirectional threaded rod, and the problems that during use, the position of a lifted jack is inconvenient to adjust, only steel bars on the same straight line can be tensioned, time and labor are wasted, the working efficiency is reduced, use is inconvenient, meanwhile, the equipment is not provided with a protective structure, and the use safety of the equipment is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a box girder prestressed tensioning working bracket device. Background Art

[0002] In the field of construction, box girders are often used due to their superiority. In the construction of cast-in-place box girders, usually after the prestressed cast-in-place box girder concrete reaches the specified strength, it is necessary to use jacks to tension the prestressed steel bars, and increase the strength of the steel strands in the anchors to give the prestress value.

[0003] The Chinese patent discloses: a prefabricated box girder prestressing tensioning device, patent application number: 202122526582.5, which "includes a base, a moving component is provided at the lower end of the base, a lifting column is provided at the upper end of the base, a connecting rod is provided at the upper end of the lifting column, a fixed plate is provided at the end of the connecting rod, and a pushing mechanism is provided on the fixed plate. The utility model arranges a moving component at the lower end of the base and a lifting column and a pushing mechanism at the upper end of the base and connects them, places the jack on the pushing mechanism, facilitates the adjustment of the distance between the jack and the bridge, and realizes the automatic lifting of the height of the jack, which is convenient for the staff to install and thus improves the work efficiency."

[0004] Although the device can conveniently adjust the distance between the jack and the bridge, and automatically raise and lower the height of the jack, making it convenient for workers to install it, the device is inconvenient to adjust the position of the jack after lifting during use, and can only perform tensioning operations on the steel bars in the same straight line. When it is necessary to tension steel bars in different positions, the device needs to be moved to the same position for operation, which is time-consuming and labor-intensive, reduces work efficiency, and is inconvenient to use. At the same time, the device does not have a protective structure, and accidents such as steel strands breaking and injuring people may easily occur during the tensioning process of the jack, reducing the safety of the device. Utility Model Content

[0005] The utility model provides a box beam prestressed tensioning working bracket device, which solves the problem.

[0006] The technical solution of the utility model is as follows: a box girder prestressed tensioning working support device, comprising a working support, a servo motor is fixedly connected to the side wall of the working support, a threaded rod is fixedly connected to the output shaft of the servo motor, the threaded rod is rotatably connected to the top inner wall of the working support, a moving block is threadedly connected to the outer wall of the threaded rod, a moving plate is fixedly connected to the bottom of the moving block, a first sliding block is fixedly connected to the top of both sides of the moving plate, and sliding grooves are provided on both sides of the top of the working support;

[0007] The first slider is slidably connected to both sides of the slide groove, rollers are rotatably connected to both sides of the inner wall of the first slider, a bidirectional threaded rod is rotatably connected to the bottom inner wall of the movable plate, a rotating motor is fixedly connected to one side of the movable plate, the output shaft of the rotating motor and the bidirectional threaded rod are fixed to each other, the outer walls at both ends of the bidirectional threaded rod are threadedly connected to a lifting assembly, and a protective assembly is fixedly installed on the side wall of the working bracket.

[0008] Preferably, the lifting assembly includes a second slider, the second slider is threadedly connected to the outer wall of the bidirectional threaded rod and slidably connected to the movable plate, the bottom of the second slider is fixedly connected to a support box, the interior of the support box is rotatably connected to a winding roller, the outer wall of the winding roller is fixedly connected to a lifting chain, the side wall of the support box is fixedly connected to a driving motor, and the output shaft of the driving motor is fixedly connected to the side wall of the winding roller.

[0009] Preferably, the protection component includes a fixing rod, the fixing rod is fixedly connected to the side wall of the working bracket, the outer wall of the fixing rod is sleeved with a compression spring, and the outer wall of the fixing rod is slidably connected to the first protection plate.

[0010] Preferably, the protective assembly also includes an outer sleeve, a buffer spring is fixedly connected to the interior of the outer sleeve, one end of the buffer spring is fixedly connected to an inner sleeve, the inner sleeve is slidably connected in the outer sleeve, and one end of the inner sleeve is fixedly connected to a second protective plate.

[0011] Preferably, one end of the hanging chain is fixedly connected with a hook.

[0012] Preferably, the bottom of the working bracket is rotatably connected with a moving wheel.

[0013] Preferably, a fixing block is fixedly connected to the side wall of the working bracket close to the side wall of the moving wheel, a threaded limiting column is threadedly connected to the top of the fixing block, and one end of the threaded limiting column is rotatably connected to the limiting bottom plate.

[0014] Preferably, two lifting assemblies are provided and arranged opposite to each other.

[0015] The beneficial effects of the utility model are as follows: the servo motor and the threaded rod drive the moving block and the moving plate to move, and the rotating motor drives the lifting assembly through the bidirectional threaded rod to move horizontally and vertically, so as to better control the lifted jack, make its control more flexible, avoid only being able to tension the steel bars in the same straight line, save time and effort, improve work efficiency, and make it more convenient to use. At the same time, after the steel strand is broken, it will collide with the second protective plate, and the second protective plate will drive the inner sleeve to squeeze the buffer spring and the outer sleeve, thereby reducing the force of the steel strand collision. At this time, the outer sleeve will continue to squeeze the first protective plate of the side wall, and the first protective plate will slide on the fixed rod and squeeze the extrusion spring set on the outer wall, thereby further reducing the force of the steel strand collision, avoiding the collision force causing damage to the second protective plate, improving the protection ability of the second protective plate, avoiding the steel strand breaking and injuring accidents, improving the safety of the equipment, and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the horizontal and vertical movement structure of the movable plate and the lifting assembly of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the lifting assembly of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the protective component of the utility model;

[0021] Figure 5 For this utility model Figure 4 Schematic diagram of the structure at A in the middle;

[0022] In the figure: 1. working bracket; 2. servo motor; 3. threaded rod; 4. moving block; 5. moving plate; 6. first slider; 7. roller; 8. bidirectional threaded rod; 9. rotating motor; 10. lifting assembly; 11. slide; 12. second slider; 13. support box; 14. winding roller; 15. lifting chain; 16. driving motor; 17. protection assembly; 18. fixing rod; 19. extrusion spring; 20. first protective plate; 21. outer sleeve; 22. buffer spring; 23. inner sleeve; 24. second protective plate; 25. moving wheel; 26. fixing block; 27. threaded limit column; 28. limit bottom plate. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution for a box girder prestressing tensioning working support device: comprising a working support 1, a servo motor 2 is fixedly connected to the side wall of the working support 1, a threaded rod 3 is fixedly connected to the output shaft of the servo motor 2, the threaded rod 3 is rotatably connected to the top inner wall of the working support 1, a moving block 4 is threadedly connected to the outer wall of the threaded rod 3, a moving plate 5 is fixedly connected to the bottom of the moving block 4, a first slider 6 is fixedly connected to the top of both sides of the moving plate 5, and sliding grooves 11 are provided on both sides of the top of the working support 1;

[0025] The first slider 6 is slidably connected to the two sides of the slide groove 11, and the two sides of the inner wall of the first slider 6 are rotatably connected with rollers 7, which reduce the friction between the first slider 6 and the slide groove 11, so that the moving plate 5 can move more smoothly. The bottom inner wall of the moving plate 5 is rotatably connected with a two-way threaded rod 8, and one side of the moving plate 5 is fixedly connected with a rotating motor 9. The output shaft of the rotating motor 9 and the two-way threaded rod 8 are fixed to each other. The outer walls of both ends of the two-way threaded rod 8 are threadedly connected with a lifting assembly 10. The threaded rod 3 is driven to rotate by the servo motor 2, and the threaded rod 3 drives the moving block 4 and the moving plate 5 and the lifting assembly 10 at the bottom to move vertically. Then the rotating motor 9 drives the lifting assembly 10 to move horizontally through the two-way threaded rod 8, so that the lifted jack can be better controlled, making its control more flexible, without manual handling and dragging, saving time and effort, improving work efficiency, and being more convenient to use;

[0026] Two hoisting assemblies 10 are provided and arranged oppositely. By providing two hoisting assemblies 10, the steel bars of the symmetrical box beams can be tensioned synchronously to improve work efficiency. The hoisting assembly 10 includes a second slider 12, which is threadedly connected to the outer wall of the bidirectional threaded rod 8 and slidably connected to the movable plate 5. The bottom of the second slider 12 is fixedly connected to a support box 13, and the internal rotation of the support box 13 is connected to a winding roller 14. The outer wall of the winding roller 14 is fixedly connected to a lifting chain 15, and one end of the lifting chain 15 is fixedly connected to a hook. The side wall of the support box 13 is fixedly connected to a driving motor 16, and the output shaft of the driving motor 16 is fixedly connected to the side wall of the winding roller 14. The jack can be quickly lifted without the need for staff to carry it, thereby reducing the labor degree of the staff.

[0027] The side wall of the working support 1 is fixedly installed with a protective assembly 17, which includes a fixed rod 18, which is fixedly connected to the side wall of the working support 1, and the outer wall of the fixed rod 18 is provided with an extrusion spring 19, and the outer wall of the fixed rod 18 is slidably connected with a first protective plate 20, and the protective assembly 17 also includes an outer sleeve 21, and the inner part of the outer sleeve 21 is fixedly connected with a buffer spring 22, and one end of the buffer spring 22 is fixedly connected with an inner sleeve 23, and the inner sleeve 23 is slidably connected in the outer sleeve 21, and one end of the inner sleeve 23 is fixedly connected to the inner sleeve 23. A second protective plate 24 is fixedly connected, and the steel strand will collide with the second protective plate 24. The second protective plate 24 will drive the inner sleeve 23 to squeeze the buffer spring 22 and the outer sleeve 21, thereby reducing the force of the steel strand collision. At this time, the outer sleeve 21 will squeeze the first protective plate 20 of the side wall, and the first protective plate 20 will slide on the fixed rod 18 and squeeze the squeezing spring 19 sleeved on the outer wall, thereby further reducing the force of the steel strand collision, avoiding the collision force causing damage to the second protective plate 24, and improving the protection ability of the second protective plate 24;

[0028] The bottom of the working bracket 1 is rotatably connected to a moving wheel 25, and the moving wheel 25 is used to facilitate the movement of the working bracket 1. The side wall of the working bracket 1 close to the moving wheel 25 is fixedly connected to a fixing block 26, and the top of the fixing block 26 is threadedly connected to a threaded limiting column 27, and one end of the threaded limiting column 27 is rotatably connected to a limiting bottom plate 28. By rotating the threaded limiting column 27, the servo motor 2 then drives the limiting bottom plate 28 to move downward. At this time, the limiting bottom plate 28 will contact the ground, thereby limiting the working bracket 1 and preventing the working bracket 1 from moving and offsetting during operation.

[0029] The working principle of the utility model is as follows: firstly, the power is turned on, and the jack is fixed by the hook at one end of the lifting chain 15. After the fixing is completed, the driving motors 16 at both ends of the bidirectional threaded rod 8 are started to drive the winding roller 14 to rotate, and then the winding roller 14 is synchronously contracted and the lifting chain 15 is wound around the winding roller 14, so that the jack can be driven to move upward. When it moves to a suitable height, the servo motor 2 is started, and the servo motor 2 drives the threaded rod 3 to rotate, and the threaded rod 3 drives the moving block 4 to move on the inner wall of the working bracket 1 to drive the bottom moving plate 5 and the lifting assembly 10 to move in the direction of the steel bar and make the steel bar pass through the jack, and then the jack starts the tensioning work;

[0030] After the work is completed, the servo motor 2 is started again. After the servo motor 2 drives the moving block 4, the moving plate 5 and the bottom lifting assembly 10 away from the steel bars, the rotating motor 9 is started. The rotating motor 9 drives the bidirectional threaded rod 8 to rotate, and the bidirectional threaded rod 8 drives the lifting assemblies 10 at both ends to move synchronously and approach each other, and then repeat the above operation. There is no need for the staff to move the jack, and at the same time, controlling the movement of the jack is more flexible and convenient. When the steel strand is accidentally broken during the tensioning process of the jack, the steel strand will collide with the second protective plate 24, and the second protective plate 24 will drive the inner sleeve 23 to squeeze the buffer spring 22 and the outer sleeve 21, thereby reducing the force of the steel strand collision. At this time, the outer sleeve 21 will squeeze the first protective plate 20 of the side wall, and the first protective plate 20 will slide on the fixed rod 18 and squeeze the extrusion spring 19 set on the outer wall, thereby further reducing the force of the steel strand collision and avoiding the collision force causing damage to the second protective plate 24.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A box girder prestressing tensioning working support device, comprising a working support (1), characterized in that: A servo motor (2) is fixedly connected to the side wall of the working support (1); a threaded rod (3) is fixedly connected to the output shaft of the servo motor (2); the threaded rod (3) is rotatably connected to the top inner wall of the working support (1); a moving block (4) is threadedly connected to the outer wall of the threaded rod (3); a moving plate (5) is fixedly connected to the bottom of the moving block (4); and first sliding blocks (6) are fixedly connected to the tops of both sides of the moving plate (5); Slide grooves (11) are provided on both sides of the top of the working bracket (1), the first sliding block (6) is slidably connected to both sides of the slide groove (11), rollers (7) are rotatably connected to both sides of the inner wall of the first sliding block (6), a bidirectional threaded rod (8) is rotatably connected to the inner wall of the bottom of the movable plate (5), a rotating motor (9) is fixedly connected to one side of the movable plate (5), an output shaft of the rotating motor (9) and the bidirectional threaded rod (8) are fixedly fixed to each other, a lifting assembly (10) is threadedly connected to the outer walls of both ends of the bidirectional threaded rod (8), and a protective assembly (17) is fixedly installed on the side wall of the working bracket (1).

2. A box girder prestressing tensioning working support device according to claim 1, characterized in that: The hoisting assembly (10) comprises a second slider (12), the second slider (12) being threadedly connected to the outer wall of the bidirectional threaded rod (8) and slidably connected to the movable plate (5), the bottom of the second slider (12) being fixedly connected to a support box (13), the interior of the support box (13) being rotatably connected to a winding roller (14), the outer wall of the winding roller (14) being fixedly connected to a lifting chain (15), the side wall of the support box (13) being fixedly connected to a driving motor (16), and the output shaft of the driving motor (16) being fixedly connected to the side wall of the winding roller (14).

3. A box girder prestressing tensioning working support device according to claim 1, characterized in that: The protection assembly (17) comprises a fixing rod (18), the fixing rod (18) being fixedly connected to the side wall of the working bracket (1), the outer wall of the fixing rod (18) being sleeved with a pressing spring (19), and the outer wall of the fixing rod (18) being slidably connected to a first protection plate (20).

4. A box girder prestressed tensioning working support device according to claim 1, characterized in that: The protection assembly (17) further comprises an outer sleeve (21), a buffer spring (22) being fixedly connected inside the outer sleeve (21), one end of the buffer spring (22) being fixedly connected to an inner sleeve (23), the inner sleeve (23) being slidably connected inside the outer sleeve (21), and one end of the inner sleeve (23) being fixedly connected to a second protection plate (24).

5. A box girder prestressing tensioning working support device according to claim 2, characterized in that: One end of the hanging chain (15) is fixedly connected to a hook.

6. A box girder prestressing tensioning working support device according to claim 1, characterized in that: The bottom of the working support (1) is rotatably connected to a moving wheel (25).

7. A box girder prestressed tensioning working support device according to claim 1, characterized in that: A fixing block (26) is fixedly connected to a side wall of the working bracket (1) close to the side wall of the moving wheel (25); a threaded limiting column (27) is threadedly connected to the top of the fixing block (26); and one end of the threaded limiting column (27) is rotatably connected to a limiting bottom plate (28).

8. A box girder prestressing tensioning working support device according to claim 1, characterized in that: The hoisting components (10) are provided in two numbers and are arranged opposite to each other.

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