Prestress tensioning jack in-place device for bridge engineering construction

Abstract

The utility model relates to the technical field of bridge engineering construction equipment, and discloses a prestressed tensioning jack in-place device for bridge engineering construction, which comprises a bridge, prestressed tendons are arranged on the inner side of the bridge, a base is arranged at the top of the bridge, a jack is arranged on the left side of the base, a U-shaped frame is arranged on the outer side of the base, and the U-shaped frame is arranged on the right side of the base. Rotating wheels are rotationally connected to the periphery of the bottom of the U-shaped frame, threaded columns are rotationally connected to the front side and the rear side of the inner wall of the U-shaped frame, lifting blocks are in threaded connection to the outer sides of the threaded columns, and the outer sides of the lifting blocks penetrate through the U-shaped frame and are rotationally connected with telescopic plates. The counterweight rollers are placed on the front side and the rear side of the U-shaped frame, then the motor is started to drive the gear to rotate to enable the U-shaped frame to move leftwards, when the position of the device is adjusted, the threaded column is rotated to enable the counterweight rollers to be pressed on the top of the U-shaped frame through series transmission, the gear is rotated to push the base to move, the device is controlled to move by rotating the L-shaped plate and the gear, and frequent track laying is not needed.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge construction equipment, and in particular to a prestressed tensioning jack positioning device for bridge construction. Background Technology

[0002] The main function of prestressed tensioning jacks in bridge construction is to apply tension to prestressed tendons. By precisely applying tension, the concrete is subjected to compressive stress before bearing external loads, thereby effectively improving the load-bearing capacity of the bridge structure and enabling the bridge to withstand greater traffic loads and vehicle weights. In order to facilitate the positioning of the jacks, a prestressed tensioning jack positioning device for bridge construction is required.

[0003] A search revealed Chinese Patent Publication No. CN207047703U, which discloses a simple device for positioning a prestressed beam tensioning jack. The device includes a jack, hook, wire rope, winch, winch drive motor, winch travel motor, frame, travel pulleys, travel beam, rib plate, base plate, groove, angle steel truss, support rod, moving trolley, rollers, counterweight plate, beam, steel strand, and travel guide rail. The advantages of this invention are its lightweight design, its ability to move on the beam, and the presence of a counterweight plate at the rear. After stopping at the beam end, the winch lifts the jack and allows it to move back, forth, left, and right according to the position of the steel strand to be tensioned until the jack is accurately positioned. The entire placement process no longer requires a dedicated truck crane to assist in the tensioning operation, realizing the miniaturization and simplification of the equipment for hoisting and placing prestressed jacks in bridge construction. This saves resources and improves work efficiency, saving not only resources and space but also increasing the efficiency of placing tensioned jacks in bridge beams. However, in actual use, the device moves via wheels and rails. During bridge construction, the device needs to be moved as the bridge extends. This movement requires laying corresponding rails, leading to repeated laying and removal of rails during construction. This limits the device's usability and reduces its convenience. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a prestressed tensioning jack positioning device for bridge construction, aiming to improve the problem that existing jack positioning devices require repeated laying and dismantling of tracks during movement.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a prestressed tensioning jack positioning device for bridge construction, comprising a bridge, prestressed tendons arranged on the inner side of the bridge, a base arranged on the top of the bridge, a jack arranged on the left side of the base, a U-shaped frame arranged on the outer side of the base, movable wheels rotatably connected to the bottom four sides of the U-shaped frame, threaded columns rotatably connected to the front and rear sides of the inner wall of the U-shaped frame, a lifting block threadedly connected to the outer side of the threaded columns, a telescopic plate rotatably connected to the outer side of the lifting block through the U-shaped frame, an L-shaped plate rotatably connected to the outer side of the telescopic plate, a counterweight roller rotatably connected to the outer side of the L-shaped plate, the outer side of the L-shaped plate rotatably connected to the top of the U-shaped frame, a motor fixedly connected to the inner center of the U-shaped frame, a gear fixedly connected to the output end of the motor, a toothed groove formed in the middle of the outer wall of the base, the toothed groove meshing with the gear, and a positioning mechanism arranged on the outer side of the base for adjusting the position of the jack.

[0006] With the above technical solution, the counterweight roller is placed at both ends of the U-shaped frame. The motor drives the gear to move the U-shaped frame to the left through the tooth groove. When adjusting the position of the device, the screw column is rotated to cause the lifting block to move. The telescopic plate pushes the L-shaped plate to rotate, so that the counterweight roller is lifted off the ground and presses heavily on the top of the U-shaped frame. At this time, rotating the gear can push the base to move along the U-shaped frame. By rotating the L-shaped plate and the gear, the movement trajectory of the device can be controlled, and there is no need to lay the track frequently.

[0007] As a further description of the above technical solution:

[0008] The positioning mechanism includes a positioning plate, which is fixedly connected to the top left side of the base. A threaded rod is rotatably connected to the inner side of the positioning plate, and a moving block is threadedly connected to the outer side of the threaded rod. A fixed block is fixedly connected to the left side of the moving block, and a fixed frame is rotatably connected to the outer side of the fixed block. A hydraulic arm is rotatably connected to the inner side of the fixed frame, and an electric winding roller is fixedly connected to the bottom inner side of the fixed frame. A cable is provided on the outer side of the electric winding roller, and the left side of the cable is located at the bottom of the hydraulic arm. The bottom of the cable is fixedly connected to a jack.

[0009] Through the above technical solution, rotating the threaded rod changes the position of the moving block by relying on the threaded connection characteristics, and rotating the fixed frame along the fixed block can adjust the direction of the positioning mechanism. Then, the electric winding roller and hydraulic arm are started, and their up-and-down movement function is used to tighten or release the cable, thereby precisely controlling the height of the jack and achieving comprehensive and accurate position adjustment of the jack.

[0010] As a further description of the above technical solution:

[0011] A motor is fixedly connected to the top center of the U-shaped frame. The output end of the motor passes through the U-shaped frame and is fixedly connected to a first rotating wheel. A second rotating wheel is rotatably connected to the front and rear sides of the top of the outer wall of the U-shaped frame. A belt is provided on the outer side of the second rotating wheel. The first rotating wheel is connected to the second rotating wheel through the belt. The bottom of the second rotating wheel is fixedly connected to the threaded post.

[0012] The above technical solution starts the motor to drive the first rotating wheel to rotate, and drives the second rotating wheel to rotate through the belt, so as to drive the two threaded columns to rotate synchronously.

[0013] As a further description of the above technical solution:

[0014] A handle is fixedly connected to the right side of the outer wall of the U-shaped frame, and a protective sleeve is fixedly connected to the outside of the handle.

[0015] The above technical solution facilitates the handling and movement of the device by gripping the handle.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the base is provided with grooves around all four sides, and the inner wall of the grooves is rotatably connected to the left and right sides of the grooves.

[0018] The above technical solution allows the base to be moved easily via the wheels inside the groove.

[0019] As a further description of the above technical solution:

[0020] The base has sliding grooves on both the front and rear sides of its outer wall, and the sliding grooves are slidably connected to the U-shaped frame.

[0021] The above technical solution, through the positioning of the slide groove, can improve the stability of the U-shaped frame during movement.

[0022] As a further description of the above technical solution:

[0023] Positioning blocks are fixedly connected to the bottom of the outer wall of the bridge, and positioning holes are opened on the outer side of the positioning blocks.

[0024] The above technical solution facilitates the installation and fixation of the device by installing threaded parts in the positioning holes.

[0025] As a further description of the above technical solution:

[0026] A knob is rotatably connected to the front side of the positioning plate, and the rear side of the knob passes through the positioning plate and is fixedly connected to the threaded rod.

[0027] The above technical solution allows the threaded rod to be easily rotated via a knob.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, when the counterweight roller is placed on the front and rear sides of the U-shaped frame, the motor drives the gear to move the U-shaped frame to the left through the tooth groove transmission. When adjusting the device position, the rotating threaded column drives the lifting block, which pushes the L-shaped plate to rotate through the telescopic plate. The counterweight roller is lifted off the ground and pressed against the top of the U-shaped frame. Then, the gear can be rotated to push the base to move along the U-shaped frame. The movement of the device can be controlled by rotating the L-shaped plate and the gear. This eliminates the need for frequent track laying, thereby improving the convenience of the device.

[0030] 2. In this utility model, the position of the moving block is adjusted by rotating the threaded rod, and the orientation of the positioning mechanism can be changed by rotating the fixed frame along the fixed block. Then, the electric winding roller and hydraulic arm are started to move up and down. The height of the jack is adjusted by tightening or releasing the cable, so as to realize the all-round adjustment of the jack, thereby improving the practicality of the device. Attached Figure Description

[0031] Figure 1 This is a perspective view of a prestressed tensioning jack positioning device for bridge construction proposed in this utility model.

[0032] Figure 2 This is a front view of a prestressed tensioning jack positioning device for bridge construction proposed in this utility model.

[0033] Figure 3 This is a top view of a prestressed tensioning jack positioning device for bridge construction proposed in this utility model;

[0034] Figure 4 This is a partial structural exploded view of a prestressed tensioning jack positioning device for bridge construction proposed in this utility model;

[0035] Figure 5 This is a structural breakdown diagram of the positioning mechanism of a prestressed tensioning jack positioning device for bridge construction proposed in this utility model.

[0036] Legend:

[0037] 1. Bridge; 2. Positioning mechanism; 201. Positioning plate; 202. Threaded rod; 203. Moving block; 204. Fixed block; 205. Fixed frame; 206. Hydraulic arm; 207. Electric winding roller; 208. Cable; 3. Prestressed tendon; 4. Base; 5. Moving wheel; 6. Jack; 7. U-shaped frame; 8. Motor; 9. First rotating wheel; 10. Second rotating wheel; 11. Belt; 12. Motor; 13. Gear; 14. Gear groove; 15. Lifting block; 16. Telescopic plate; 17. L-shaped plate; 18. Counterweight roller; 19. Groove; 20. Traveling wheel; 21. Knob; 22. Handle; 23. Protective sleeve; 24. Positioning block; 25. Positioning hole; 26. Threaded column; 27. Slide groove. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a prestressed tensioning jack positioning device for bridge construction, comprising a bridge 1, prestressed tendons 3 arranged on the inner side of the bridge 1, a base 4 arranged on the top of the bridge 1, a jack 6 arranged on the left side of the base 4, and a U-shaped frame 7 arranged on the outer side of the base 4. The bottom of the U-shaped frame 7 is rotatably connected to movable wheels 5, which can drive the U-shaped frame 7 to move by rotating the movable wheels 5. Threaded columns 26 are rotatably connected to the front and rear sides of the inner wall of the U-shaped frame 7, and lifting blocks 15 are threadedly connected to the outer side of the threaded columns 26. Rotating the threaded columns 26 can drive the lifting blocks 15 to move. The outer side of the lifting blocks 15 penetrates the U-shaped frame. A telescopic plate 16 is rotatably connected to frame 7. An L-shaped plate 17 is rotatably connected to the outside of telescopic plate 16. As telescopic plate 16 rotates and extends, it drives L-shaped plate 17 to move. A counterweight roller 18 is rotatably connected to the outside of L-shaped plate 17. The outside of L-shaped plate 17 is rotatably connected to the top of U-shaped frame 7. A motor 12 is fixedly connected to the middle of the inner side of U-shaped frame 7. A gear 13 is fixedly connected to the output end of motor 12. Starting motor 12 can drive gear 13 to rotate. A toothed groove 14 is opened in the middle of the outer wall of base 4. The toothed groove 14 is meshed with gear 13. A positioning mechanism 2 is provided on the outside of base 4. The positioning mechanism 2 is used to adjust the position of jack 6.

[0040] Specifically, when the counterweight roller 18 is placed on the front and rear sides of the U-shaped frame 7, the motor 12 is started to drive the gear 13 to rotate. Since the gear 13 and the tooth groove 14 mesh with each other, this meshing transmission will cause the U-shaped frame 7 to move along the base 4 to the leftmost side it can reach. When the position of the entire device needs to be adjusted later, the threaded column 26 is rotated. With the help of the threaded connection, the threaded column 26 will drive the lifting block 15 to move. The movement of the lifting block 15 will push the telescopic plate 16 to move accordingly, and then push the L-shaped plate 17 to rotate. During this process, the counterweight roller 18 will be separated from the ground, and its weight will be fully applied to the top of the U-shaped frame 7. At this time, if the gear 13 is rotated, the position of the U-shaped frame 7 itself will not change, but will instead push the base 4 to move along the U-shaped frame 7. In this way, the movement of the device can be effectively controlled by rotating the L-shaped plate 17 and the gear 13, thereby avoiding the troublesome operation of frequently laying tracks and improving the convenience and flexibility of device position adjustment.

[0041] Reference Figure 1 , Figure 2 and Figure 5 The positioning mechanism 2 includes a positioning plate 201, which is fixedly connected to the top left side of the base 4. A threaded rod 202 is rotatably connected to the inner side of the positioning plate 201, and a moving block 203 is threadedly connected to the outer side of the threaded rod 202. Rotating the threaded rod 202 can drive the moving block 203 to move. A fixed block 204 is fixedly connected to the left side of the moving block 203. A fixed frame 205 is rotatably connected to the outer side of the fixed block 204. A hydraulic arm 206 is rotatably connected to the inner side of the fixed frame 205. An electric winding roller 207 is fixedly connected to the bottom inner side of the fixed frame 205. A cable 208 is provided on the outer side of the electric winding roller 207. Starting the electric winding roller 207 can wind up the cable 208. The left side of the cable 208 is provided at the bottom of the hydraulic arm 206. The bottom of the cable 208 is fixedly connected to the jack 6. The winding and unwinding of the cable 208 can adjust the position of the jack 6.

[0042] Specifically, by rotating the threaded rod 202, the position of the moving block 203 in the front-back direction can be precisely adjusted through its threaded connection with the moving block 203. At the same time, the fixed frame 205 can be rotated around the fixed block 204 as an axis, thus flexibly changing the orientation of the positioning mechanism 2. Based on this, the electric winding roller 207 is started and the hydraulic arm 206 is operated to move up and down. By tightening or releasing the cable 208, the height of the jack 6 can be effectively adjusted. The position of the jack 6 can be adjusted in all directions and with precision, so that its positioning position can achieve higher accuracy requirements, thereby better meeting the relevant operational needs.

[0043] Reference Figure 1 , Figure 2 and Figure 3 A motor 8 is fixedly connected to the top center of the U-shaped frame 7. The output end of the motor 8 passes through the U-shaped frame 7 and is fixedly connected to a first rotating wheel 9. Starting the motor 8 can drive the first rotating wheel 9 to rotate. A second rotating wheel 10 is rotatably connected to the front and rear sides of the top of the outer wall of the U-shaped frame 7. A belt 11 is provided on the outer side of the second rotating wheel 10. The second rotating wheel 10 can be driven to rotate through the transmission of the belt 11. The first rotating wheel 9 is connected to the second rotating wheel 10 through the belt 11. The bottom of the second rotating wheel 10 is fixedly connected to the threaded post 26. As the second rotating wheel 10 rotates, it can drive the threaded post 26 to rotate. A handle 22 is fixedly connected to the right side of the outer wall of the U-shaped frame 7. A protective sleeve 23 is fixedly connected to the outer side of the handle 22. The device can be held and carried through the handle 22 and the protective sleeve 23. Grooves 19 are opened around the outer wall of the base 4. The left and right sides of the inner wall of the groove 19 are rotatably connected to the walking wheels 20, which can facilitate the movement of the base 4.

[0044] Specifically, starting the motor 8 can drive the first rotating wheel 9 to rotate, and drive the second rotating wheel 10 to rotate through the belt 11, so as to synchronously drive the two threaded columns 26 to rotate. The U-shaped frame 7 can be easily pushed manually by holding the handle 22, and the protective sleeve 23 on it can be easily held and moved by the carrying device. The walking wheel 20 in the groove 19 can easily drive the base 4 to move.

[0045] Reference Figure 2 , Figure 3 and Figure 4 The base 4 has sliding grooves 27 on both the front and rear sides of its outer wall. The sliding grooves 27 are slidably connected to the U-shaped frame 7, which can improve the stability of the U-shaped frame 7 when it moves. The bottom of the outer wall of the bridge 1 is fixedly connected to positioning blocks 24. Positioning holes 25 are opened on the outer side of the positioning blocks 24, which can facilitate the installation and fixing of the device. The front side of the positioning plate 201 is rotatably connected to a knob 21. The rear side of the knob 21 passes through the positioning plate 201 and is fixedly connected to the threaded rod 202, which can facilitate the rotation of the threaded rod 202 by the knob 21.

[0046] Specifically, the slide 27 can improve the stability of the U-shaped frame 7 when moving, the screws installed in the positioning holes 25 on the positioning block 24 can be used to fix the device, and the knob 21 can be used to drive the threaded rod 202 to rotate.

[0047] Working principle: Before using the device, when the counterweight roller 18 is placed on the front and rear sides of the U-shaped frame 7, the motor 12 is started to drive the gear 13 to rotate. At this time, through the meshing transmission with the tooth groove 14, the U-shaped frame 7 can be moved along the base 4 to the leftmost position that can be moved. Then, when it is necessary to adjust the position of the device, rotating the threaded column 26 can drive the lifting block 15 to move through the threaded connection, and push the telescopic plate 16 to move to push the L-shaped plate 17 to rotate. At this time, the counterweight roller 18 ends its contact with the ground, so that its weight is completely pressed on the top of the U-shaped frame 7. At this time, rotating the gear 13 will not move the position of the U-shaped frame 7, but will push the base 4 to move along the U-shaped frame 7. The movement of the device can be controlled by rotating the L-shaped plate 17 and the gear 13, without the need for frequent track laying.

[0048] Furthermore, by rotating the threaded rod 202, the front and rear positions of the moving block 203 can be adjusted via the threaded connection, and by rotating the fixed frame 205 along the fixed block 204, the orientation of the positioning mechanism 2 can be adjusted. At this time, by starting the electric winding roller 207 and starting the hydraulic arm 206 to move up and down, the height position of the jack 6 can be adjusted by tightening or releasing the cable 208, so as to make precise adjustment of its positioning position.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, it is still convenient for those skilled in the art to modify the technical solutions described in the foregoing embodiments or to make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prestressed tensioning jack positioning device for bridge construction, comprising a bridge (1), characterized in that: The bridge (1) is provided with prestressed tendons (3) on its inner side, and a base (4) is provided on the top of the bridge (1). A jack (6) is provided on the left side of the base (4). A U-shaped frame (7) is provided on the outer side of the base (4). The bottom of the U-shaped frame (7) is rotatably connected with moving wheels (5). The inner wall of the U-shaped frame (7) is rotatably connected with threaded columns (26) on both the front and back sides. A lifting block (15) is threadedly connected to the outer side of the threaded column (26). The outer side of the lifting block (15) passes through the U-shaped frame (7) and is rotatably connected with a telescopic plate (16). An L-shaped plate (17) is rotatably connected to the outside of the base (4), and a counterweight roller (18) is rotatably connected to the outside of the L-shaped plate (17). The outside of the L-shaped plate (17) is rotatably connected to the top of the U-shaped frame (7). A motor (12) is fixedly connected to the middle of the inner side of the U-shaped frame (7). A gear (13) is fixedly connected to the output end of the motor (12). A toothed groove (14) is provided in the middle of the outer wall of the base (4). The toothed groove (14) meshes with the gear (13). A positioning mechanism (2) is provided on the outside of the base (4). The positioning mechanism (2) is used to adjust the position of the jack (6).

2. The prestressed tensioning jack positioning device for bridge construction according to claim 1, characterized in that: The positioning mechanism (2) includes a positioning plate (201), which is fixedly connected to the top left side of the base (4). A threaded rod (202) is rotatably connected to the inner side of the positioning plate (201), and a moving block (203) is threadedly connected to the outer side of the threaded rod (202). A fixed block (204) is fixedly connected to the left side of the moving block (203), and a fixed frame (205) is rotatably connected to the outer side of the fixed block (204). A hydraulic arm (206) is rotatably connected to the inner side of the fixed frame (205), and an electric winding roller (207) is fixedly connected to the bottom inner side of the fixed frame (205). A cable (208) is provided on the outer side of the electric winding roller (207), and the left side of the cable (208) is provided at the bottom of the hydraulic arm (206). The bottom of the cable (208) is fixedly connected to the jack (6).

3. The prestressed tensioning jack positioning device for bridge construction according to claim 1, characterized in that: A motor (8) is fixedly connected to the top center of the U-shaped frame (7). The output end of the motor (8) passes through the U-shaped frame (7) and is fixedly connected to a first rotating wheel (9). A second rotating wheel (10) is rotatably connected to the front and rear sides of the top of the outer wall of the U-shaped frame (7). A belt (11) is provided on the outer side of the second rotating wheel (10). The first rotating wheel (9) is connected to the second rotating wheel (10) through the belt (11). The bottom of the second rotating wheel (10) is fixedly connected to the threaded column (26).

4. The prestressed tensioning jack positioning device for bridge construction according to claim 1, characterized in that: A handle (22) is fixedly connected to the right side of the outer wall of the U-shaped frame (7), and a protective sleeve (23) is fixedly connected to the outside of the handle (22).

5. The prestressed tensioning jack positioning device for bridge construction according to claim 1, characterized in that: The base (4) has grooves (19) on all four sides of its outer wall, and the inner walls of the grooves (19) are rotatably connected to the left and right sides of the grooves (20).

6. The prestressed tensioning jack positioning device for bridge construction according to claim 1, characterized in that: The base (4) has sliding grooves (27) on both the front and rear sides of its outer wall, and the sliding grooves (27) are slidably connected to the U-shaped frame (7).

7. The prestressed tensioning jack positioning device for bridge construction according to claim 1, characterized in that: The bridge (1) has positioning blocks (24) fixedly connected around the bottom of its outer wall, and positioning holes (25) are provided on the outer side of the positioning blocks (24).

8. A prestressed tensioning jack positioning device for bridge construction according to claim 2, characterized in that: A knob (21) is rotatably connected to the front side of the positioning plate (201), and the rear side of the knob (21) passes through the positioning plate (201) and is fixedly connected to the threaded rod (202).

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