Bridge prefabricated part lifting device

Abstract

The invention relates to the technical field of bridge prefabricated part hoisting, and discloses a bridge prefabricated part hoisting device which comprises a main winch, the main winch is fixedly connected to the middle of the bottom end of the interior of a cross beam, auxiliary winches are fixedly connected to the left side and the right side of the bottom end of the interior of the cross beam, and a mounting plate is arranged at the bottom of the cross beam; a plurality of mooring ropes are arranged on the left side and the right side of the top of the mounting plate, the main winch and the auxiliary winch are fixedly connected with the mounting plate through the mooring ropes, and a first gear is rotationally connected to the inner side of the mounting plate. The main winch is started, the height of the mounting plate is adjusted through the cable to hoist a workpiece, the auxiliary winches on the two sides are synchronously started to assist in transmission of the cable to reduce starting slippage, and if the center of the workpiece deviates to incline the mounting plate, the second gear and the telescopic plate are rotated to push the balancing weight to the inclined reverse side, so that the mounting plate is aligned to keep stable hoisting.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting of bridge precast components, and specifically relates to a hoisting device for bridge precast components. Background Art

[0002] Bridge precast components are bridge components prefabricated in a factory in advance according to design requirements, such as precast beams, slabs and piers. They have the advantages of controllable quality, fast construction speed, environmental protection and energy saving. Through standardized production processes and reliable connection methods, their wide application in bridge construction significantly improves construction efficiency and quality. In order to facilitate the movement and handling of precast components, a hoisting device for bridge precast components is required.

[0003] A hoisting device for bridge precast components is a special equipment for safely and efficiently hoisting bridge precast components to the installation position. It consists of a hoisting mechanism, a sling and a positioning structure, can bear the weight of the components, maintain stability and accurately position, and is an important tool indispensable in bridge construction.

[0004] At present, the hoisting devices for bridge precast components on the market lift objects by the lifting of rope and pulley slings. In order to prevent the object from shifting, in the prior art, an electronic sensor is installed on the hook to detect the degree of inclination to keep the workpiece balanced. However, in actual use, this detection method will frequently cause electronic equipment failures due to the large amount of dust in the construction site. And when lifting and lowering only through a single rope and pulley, when the center of gravity of the workpiece shifts, it is easy to cause inclination and the hook will slip instantly during heavy load startup, thus reducing the stability of the device. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a hoisting device for bridge precast components, which solves the problems that the hoisting device is prone to hook slip and the hoisting and balancing effects are unstable.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A hoisting device for bridge precast components, including a cross beam, both the left and right sides of the bottom of the cross beam are rotatably connected with support columns, a hoisting mechanism is arranged at the bottom of the cross beam, the hoisting mechanism is used for hoisting a workpiece, a hook mechanism is arranged on the outer side of the cross beam, the hook mechanism is used for fixing workpieces of different specifications, and a positioning mechanism is arranged at the bottom of the cross beam, the positioning mechanism is used for moving and positioning the device; The lifting mechanism includes a main winch, which is fixedly connected to the middle part of the inner bottom end of the beam, and auxiliary winches are fixedly connected to the left and right sides of the inner bottom end of the beam. A mounting plate is provided at the bottom of the beam, and a plurality of cables are provided on the left and right sides of the top of the mounting plate. The main winch and the auxiliary winch are fixedly connected to the mounting plate through the cables, and a gear 1 is rotatably connected to the inner side of the mounting plate, and a counterweight ball is fixedly connected to the bottom of the gear 1, and a U-shaped cover is fixedly connected to the middle part of the top of the mounting plate, and a gear 2 is rotatably connected to the inner side of the U-shaped cover, and the gear 2 is meshed with the gear 1, and a telescopic plate is fixedly connected to the outer side of the gear 2, and a counterweight block is rotatably connected to the top of the telescopic plate, and the top of the counterweight block is slidably connected to the beam, and a sealing assembly is provided on the outer side of the beam.

[0007] Preferably, the hook mechanism includes a motor, and the two motors are respectively fixedly connected to the left and right sides of the inside of the mounting plate, the output end of the motor is fixedly connected to a threaded column, the outer side of the threaded column is threadedly connected to a threaded block, the front and rear sides of the inner part of the threaded block are rotatably connected to a telescopic block, the outer side of the telescopic block passes through the mounting plate and is fixedly connected to a clamping plate, the bottom of the threaded block passes through the mounting plate, and a fixing component is provided on the outer side of the clamping plate.

[0008] Preferably, the positioning mechanism includes a rotating column and a belt, the two rotating columns are rotatably connected to the bottom of the support column respectively, the outer side of the rotating column is slidably connected with a connecting cover, the top front and rear sides of the connecting cover are fixedly connected with a damper, the top of the damper is fixedly connected to the support column, the inner middle part of the rotating column is fixedly connected with an electric telescopic rod, the bottom end of the electric telescopic rod is fixedly connected to the connecting cover, the inner front and rear sides of the connecting cover are rotatably connected to walking wheels, the top of the cross beam is fixedly connected with a motor, the output end of the motor passes through the cross beam and is fixedly connected with a rotating wheel 1, the left and right sides of the inside of the cross beam are rotatably connected with rotating wheels 2, the rotating wheel 2 is transmission-connected to the rotating wheel 1 through the belt, the bottom of the rotating wheel 2 is fixedly connected to the support column, an observation assembly is provided on the inner side of the rotating column, a limiting assembly is provided on the outer side of the rotating column, and a supporting assembly is provided on the bottom of the rotating column.

[0009] Preferably, the sealing assembly includes a movable door, and the two movable doors are respectively arranged on the left and right sides of the top of the beam, and the front and rear sides of the top of the movable door are fixedly connected with hinges, and the movable door is rotatably connected to the beam through the hinges.

[0010] Preferably, the fixing assembly includes a protective pad, and the two protective pads are respectively fixedly connected to the outer bottom of the clamping plate, and the outer side of the connecting block is fixedly connected with a spring, and the other end of the spring is fixedly connected with a positioning plate.

[0011] Preferably, the observation component includes an indicating rod fixedly connected to the middle of the outer side of the rotating column, and a plurality of indicating grooves are formed in the middle of the outer side of the support column.

[0012] Preferably, the limiting component includes a bidirectional threaded rod rotatably connected to the bottom inside of the support column. Baffles are threadedly connected to the front and rear sides of the outer part of the bidirectional threaded rod, and the outer sides of the baffles penetrate through the support column.

[0013] Preferably, the support component includes a base fixedly connected to the bottom of the rotating column. Guide rods are fixedly connected to the front and rear sides of the top of the base, and the outer sides of the guide rods are slidably connected to the connecting cover.

[0014] Preferably, a controller is fixedly connected to the top of the front side of the cross beam. The controller is electrically connected to the main hoist, the auxiliary hoist, the motor and the motor respectively. A protective cover is rotatably connected to the outer side of the controller.

[0015] Preferably, a bracket is fixedly connected to the top of the support column, and the top of the bracket is slidably connected to the cross beam.

[0016] The present invention provides a lifting device for bridge precast components, having the following beneficial effects: 1. By starting the main hoist, adjusting the height of the mounting plate with the cable to lift and fix the workpiece, and at the same time starting the auxiliary hoists on both sides to assist in driving the cable, the starting slip is reduced. If the center of the workpiece is offset and causes the mounting plate to tilt, the internal counterweight ball keeps the first gear vertical, drives the second gear and the telescopic plate to rotate, and the telescopic plate rotates and telescopically pushes the counterweight block to move along the cross beam to the opposite side of the tilt, pushing the mounting plate back to the upright position, which can reduce the slip of the hook and keep the lifting stable, thus improving the stability of the device.

[0017] 2. By starting the motor to drive the threaded column to rotate, the threaded block moves left and right, and then pushes the telescopic block to rotate. With its rotation and telescoping to push the clamping plate to move, cooperating with the movement of the threaded block, the workpiece to be lifted can be conveniently clamped and fixed, and objects of different specifications and sizes can be clamped and fixed, thus improving the convenience of the device.

[0018] 3. By operating the rotating column to rotate along the support column, the tilt angle of the device can be adjusted as needed. With the help of the damper, the movement stability of the device is improved. Starting the electric telescopic rod, pushing the connecting cover to move up and down along the rotating column, driving the walking wheels to move. After contacting the ground, the device is pushed to move. By moving the connecting cover, the height of the device is adjusted. When the connecting cover moves to the top and the walking wheels leave the ground, the device is supported by the rotating column, preventing the rotation of the walking wheels from affecting the stability, which can facilitate the movement and positioning of the device, thus improving the practicality of the device. Brief Description of the Drawings

[0019] Figure 1 is a perspective view of the present invention; Figure 2 is a front view of the present invention; Figure 3 is a partial structure disassembly view of the present invention; Figure 4 is a partial structure schematic diagram of the present invention; Figure 5 is a baffle structure disassembly view of the present invention; Figure 6 is a partial structure disassembly view of the positioning mechanism of the present invention; Figure 7 is a partial structure disassembly view of the hook mechanism of the present invention; Figure 8 is a partial structure schematic diagram of the lifting mechanism of the present invention.

[0020] Wherein, 1, support column; 2, lifting mechanism; 201, main winch; 202, mounting plate; 203, cable; 204, gear one; 205, counterweight ball; 206, U-shaped cover; 207, gear two; 208, telescopic plate; 209, counterweight block; 210, movable door; 211, hinge; 212, auxiliary winch; 3, hook mechanism; 301, motor; 302, threaded column; 303, threaded block; 304, telescopic block; 305, clamping plate; 306, connecting block; 307, spring; 308, positioning plate; 309, cushion; 4, positioning mechanism; 401, motor; 402, rotating wheel one; 403, belt; 404, rotating wheel two; 405, rotating column; 406, damper; 407, connecting cover; 408, electric telescopic rod; 409, walking wheel; 410, base; 411, guide rod; 412, indicating rod; 413, indicating groove; 414, bidirectional threaded rod; 415, baffle; 5, controller; 6, protective cover; 7, bracket; 8, cross beam. Detailed Description of the Invention

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Refer to Figure 3 、 Figure 7 and Figure 8, an embodiment of the present invention provides a lifting device for bridge precast components, including a cross beam 8. Support columns 1 are rotatably connected to both the left and right sides of the bottom of the cross beam 8. A lifting mechanism 2 is provided at the bottom of the cross beam 8, and the lifting mechanism 2 is used for lifting workpieces. A hook mechanism 3 is provided on the outer side of the cross beam 8, and the hook mechanism 3 is used for fixing workpieces of different specifications. A positioning mechanism 4 is provided at the bottom of the cross beam 8, and the positioning mechanism 4 is used for moving and positioning the device; The lifting mechanism 2 includes a main winch 201. The main winch 201 is fixedly connected to the middle of the inner bottom end of the cross beam 8. Secondary winches 212 are fixedly connected to both the left and right sides of the inner bottom end of the cross beam 8. An installation plate 202 is provided at the bottom of the cross beam 8. A plurality of cables 203 are provided on the left and right sides of the top of the installation plate 202. The main winch 201 and the secondary winches 212 are fixedly connected to the installation plate 202 through the cables 203. A first gear 204 is rotatably connected to the inner side of the installation plate 202. A counterweight ball 205 is fixedly connected to the bottom of the first gear 204. A U-shaped cover 206 is fixedly connected to the middle of the top end of the installation plate 202. A second gear 207 is rotatably connected to the inner side of the U-shaped cover 206. The second gear 207 is meshed with the first gear 204. A telescopic plate 208 is fixedly connected to the outer side of the second gear 207. A counterweight block 209 is rotatably connected to the top of the telescopic plate 208. The top of the counterweight block 209 is slidably connected to the cross beam 8. A sealing assembly is provided on the outer side of the cross beam 8; Specifically, by starting the main winch 201 and using its traction effect on the cable 203, the vertical height of the installation plate 202 can be adjusted, thereby realizing the lifting operation of the workpiece fixed thereon. At the same time, the two secondary winches 212 are started synchronously to assist in driving the cable 203, which can effectively reduce the sliding distance caused by instantaneous startup. If the installation plate 202 tilts due to the offset of the workpiece's center of gravity, the counterweight ball 205 inside the installation plate 202 will ensure that the first gear 204 always remains vertical. As the installation plate 202 rotates, the first gear 204 drives the second gear 207 meshed with it and the telescopic plate 208 connected to it to rotate synchronously. At this time, the rotation action of the telescopic plate 208 and its own telescopic function will push the counterweight block 209 to move along the cross beam 8 to the opposite direction of the tilt of the installation plate 202, thereby promoting the installation plate 202 to return to the horizontal state, which can reduce the hook sliding phenomenon and maintain the stability of the hoisting operation.

[0023] Refer to Figure 2 , Figure 7 and Figure 8, the hook mechanism 3 includes motors 301. The two motors 301 are respectively fixedly connected to the left and right sides inside the mounting plate 202. The output end of the motor 301 is fixedly connected with a threaded column 302. By starting the motor 301, the threaded column 302 can be driven to rotate. A threaded block 303 is threadedly connected to the outside of the threaded column 302. When the threaded column 302 rotates, the threaded block 303 can be driven to move. Both the front and rear sides inside the threaded block 303 are rotatably connected with telescopic blocks 304. The outside of the telescopic block 304 penetrates through the mounting plate 202 and is fixedly connected with a clamping plate 305. When the telescopic block 304 rotates and expands or contracts, it can push the clamping plate 305 to move. The bottom of the threaded block 303 penetrates through the mounting plate 202. The object is fixed by the movement of the threaded block 303 and the clamping plate 305. A fixing component is arranged on the outside of the clamping plate 305; Specifically, after starting the motor 301, it will drive the threaded column 302 to rotate. When the threaded column 302 rotates, the threaded block 303 thereon will move left and right accordingly. As the threaded block 303 moves, it will push the telescopic block 304 to rotate. While the telescopic block 304 rotates, it will perform its own telescopic action, thereby pushing the clamping plate 305 to move. In addition, due to the movement of the threaded block 303, the whole mechanism can more conveniently clamp and fix the workpiece to be lifted.

[0024] Refer to Figure 1 , Figure 3 and Figure 6The positioning mechanism 4 includes a rotating column 405 and a belt 403. The two rotating columns 405 are respectively rotatably connected to the bottom of the support column 1. The outer side of the rotating column 405 is slidably connected with a connecting cover 407. The rotating column 405 can rotate along the support column 1 and has a slidable connecting cover 407 on the outer side. The top and front and rear sides of the connecting cover 407 are fixedly connected with dampers 406. The top of the damper 406 is fixedly connected to the support column 1. The damper 406 can adjust the connecting cover 407 by supporting and positioning. The middle part of the inner side of the rotating column 405 is fixedly connected with an electric telescopic rod 408. The bottom end of the electric telescopic rod 408 is fixedly connected to the connecting cover 407. Starting the electric telescopic rod 408 can push the connecting cover 407 to move, and the inner front and rear sides of the connecting cover 407 are both rotated. A walking wheel 409 is connected, and the rotation of the walking wheel 409 can facilitate the movement of the device. A motor 401 is fixedly connected to the top of the beam 8, and the output end of the motor 401 passes through the beam 8 and is fixedly connected to a rotating wheel 1 402. Starting the motor 401 can drive the rotating wheel 1 402 to rotate. The left and right sides of the inside of the beam 8 are both rotatably connected to rotating wheels 2 404, and the rotating wheel 2 404 is connected to the rotating wheel 1 402 through a belt 403. The transmission of the belt 403 can drive the rotating wheel 2 404 to rotate while the rotating wheel 1 402 rotates. The bottom of the rotating wheel 2 404 is fixedly connected to the support column 1, an observation component is provided on the inner side of the rotating column 405, a limiting component is provided on the outer side of the rotating column 405, and a supporting component is provided on the bottom of the rotating column 405; Specifically, the operator can rotate the rotating column 405 along the support column 1 and flexibly adjust the inclination angle of the device according to actual needs. At the same time, with the help of the damper 406, the stability of the device during movement can be significantly enhanced. Subsequently, the electric telescopic rod 408 is started to push the connecting cover 407 to achieve up and down displacement along the rotating column 405, thereby driving the walking wheel 409 to move synchronously. When the walking wheel 409 contacts the ground, the device can be pushed to move, and the height position of the device can be adjusted accordingly by moving the connecting cover 407. When the connecting cover 407 moves to the topmost position, the walking wheel 409 will be out of contact with the ground. At this time, the device can be directly supported by the rotating column 405, which effectively avoids the adverse effect of the rotation of the walking wheel 409 on the stability of the device.

[0025] Reference Figure 1 , Figure 2 and Figure 3 The sealing assembly includes a movable door 210, and the two movable doors 210 are respectively arranged on the left and right sides of the top of the crossbeam 8, and the front and rear sides of the top of the movable door 210 are fixedly connected with hinges 211, and the movable door 210 is rotatably connected to the crossbeam 8 through the hinges 211; Specifically, the movable door 210 can be opened and closed by the hinge 211, so that the interior thereof can be maintained and cleaned by opening and closing the device.

[0026] Referring to Figure 1 、 Figure 2 and Figure 7 , the fixing component includes a cushion pad 309. Two cushion pads 309 are respectively fixedly connected to the outer bottom of the clamping plate 305. The cushion pad 309 can reduce the wear on the clamped object when clamping it. A spring 307 is fixedly connected to the outside of the connecting block 306. The other end of the spring 307 is fixedly connected to a positioning plate 308. By pushing the positioning plate 308 with the spring 307, it is convenient to position the device; Specifically, the cushion pad 309 can reduce the wear on the workpiece when the clamping plate 305 clamps the workpiece, and the spring 307 can push the positioning plate 308 to move accordingly. Thus, the spring 307 can expand and contract to adapt to and fix workpieces with different shapes.

[0027] Referring to Figure 2 、 Figure 3 and Figure 6 , the observation component includes an indicating rod 412. The indicating rod 412 is fixedly connected to the middle of the outside of the rotating column 405. A plurality of indicating grooves 413 are formed in the middle of the outside of the support column 1. By observing the indicating groove 413 indicated by the indicating rod 412, the rotation angle of the current rotating column 405 can be judged; the limiting component includes a bidirectional threaded rod 414. The bidirectional threaded rod 414 is rotatably connected to the bottom inside the support column 1. Baffles 415 are threadedly connected to the front and rear sides of the outside of the bidirectional threaded rod 414. The outside of the baffle 415 penetrates the support column 1. Rotating the bidirectional threaded rod 414 can drive the baffle 415 to move to limit the rotation angle and range of the rotating column 405; the support component includes a base 410. The base 410 is fixedly connected to the bottom of the rotating column 405. Guide rods 411 are fixedly connected to the front and rear sides of the top of the base 410. The outside of the guide rod 411 is slidably connected to the connecting cover 407. The guide rod 411 can improve the stability of the connecting cover 407 when moving up and down; Specifically, when the rotating column 405 rotates, the indicating rod 412 thereon will rotate accordingly. At this time, by observing the indicating groove 413 indicated by the indicating rod 412, the rotation angle of the current rotating column 405 can be observed. By rotating the bidirectional threaded rod 414, the baffle 415 thereon can be driven to move. The baffle 415 can limit the moving range of the indicating rod 412, thereby adjusting the rotation angle of the rotating column 405. The guide rod 411 can improve the stability of the connecting cover 407 when moving up and down. The base 410 can support the device, and the guide rod 411 thereon can improve the stability of the connecting cover 407 when moving up and down.

[0028] Referring to Figure 1 、 Figure 2 and Figure 5, a controller 5 is fixedly connected to the top of the front side of the cross beam 8. The controller 5 is electrically connected to the main hoist 201, the auxiliary hoist 212, the motor 301 and the motor 401 respectively. Through the controller 5, the start and operation of the main hoist 201, the auxiliary hoist 212, the motor 301 and the motor 401 can be controlled respectively. A protective cover 6 is rotatably connected to the outside of the controller 5. Through the protective cover 6, the controller 5 can be protected; the top of the support column 1 is fixedly connected to a bracket 7, and the top of the bracket 7 is slidably connected to the cross beam 8. Through the bracket 7, the support effect on the support column 1 can be improved and the stability during its rotation can be enhanced; Specifically, through the controller 5, the start and operation power between the main hoist 201, the auxiliary hoist 212, the motor 301 and the motor 401 can be controlled respectively, and the controller 5 can be prevented from being accidentally touched when not in use through the openable and closable protective cover 6. The support column 1 can be supported through the bracket 7, and the stability of the support column 1 during rotation can be enhanced.

[0029] Working principle: By starting the main hoist 201, the cable 203 can be pulled to adjust the height position of the mounting plate 202 and lift the workpiece fixed thereon. At the same time, by starting the auxiliary hoists 212 on both sides to assist in driving the cable 203, the slip distance generated by the instantaneous start can be reduced. When the fixed workpiece causes the mounting plate 202 to tilt due to the center of gravity offset, the weight of the counterweight ball 205 inside it will keep the first gear 204 always vertical, and drive the second gear 207 meshed with it and the telescopic plate 208 thereon to rotate along with the rotation of the mounting plate 202. At this time, the rotation and self-telescopic of the telescopic plate 208 will push the counterweight block 209 to move along the cross beam 8 to the opposite side of the tilt of the mounting plate 202 and push the mounting plate 202 back to the correct position again, which can reduce the slip of the hook and keep the lifting stable; And starting the motor 301 can drive the threaded column 302 to rotate. When the threaded column 302 rotates, the threaded block 303 thereon can be driven to move left and right. At this time, as the threaded block 303 moves, it will push the telescopic block 304 to rotate, and with the rotation and self-telescopic of the telescopic block 304, it will push the clamping plate 305 to move. At the same time, in cooperation with the movement of the threaded block 303, it is convenient to clamp and fix the workpiece to be lifted; Finally, by operating the rotating column 405 along the support column 1, the tilt angle of the device can be adjusted according to requirements, and the stability of the device during movement can be improved through the damper 406. Then, by starting the electric telescopic rod 408, the connecting cover 407 can be pushed to move up and down along the rotating column 405, thereby driving the walking wheels 409 thereon to move accordingly. When the walking wheels 409 contact the ground, the device can be pushed to move, and the height position of the device can be adjusted by the movement of the connecting cover 407. Moreover, when the connecting cover 407 moves to the topmost position, the walking wheels 409 will lose contact with the ground, enabling the device to be directly supported by the rotating column 405 to prevent the rotation of the walking wheels 409 from affecting its stability.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge prefabricated component lifting device, comprising a cross beam (8), characterized in that: The left and right sides of the bottom of the crossbeam (8) are rotatably connected to support columns (1); a lifting mechanism (2) is provided at the bottom of the crossbeam (8); the lifting mechanism (2) is used to lift the workpiece; a hook mechanism (3) is provided on the outside of the crossbeam (8); the hook mechanism (3) is used to fix workpieces of different specifications; a positioning mechanism (4) is provided at the bottom of the crossbeam (8); the positioning mechanism (4) is used to move and position the device; The lifting mechanism (2) comprises a main hoist (201), the main hoist (201) being fixedly connected to the middle of the inner bottom end of the crossbeam (8), the left and right sides of the inner bottom end of the crossbeam (8) being fixedly connected to auxiliary hoists (212), the bottom of the crossbeam (8) being provided with a mounting plate (202), the left and right sides of the top of the mounting plate (202) being provided with a plurality of cables (203), the main hoist (201) and the auxiliary hoist (212) being fixedly connected to the mounting plate (202) via the cables (203), the inner side of the mounting plate (202) being rotatably connected to a gear 1 (2 04), a counterweight ball (205) is fixedly connected to the bottom of the gear one (204), a U-shaped cover (206) is fixedly connected to the middle of the top of the mounting plate (202), a gear two (207) is rotatably connected to the inner side of the U-shaped cover (206), the gear two (207) is meshingly connected to the gear one (204), a telescopic plate (208) is fixedly connected to the outer side of the gear two (207), a counterweight block (209) is rotatably connected to the top of the telescopic plate (208), the top of the counterweight block (209) is slidably connected to the cross beam (8), and a sealing assembly is provided on the outer side of the cross beam (8).

2. A bridge prefabricated component lifting device according to claim 1, characterized in that: The hook mechanism (3) comprises a motor (301), wherein two motors (301) are fixedly connected to the left and right sides of the interior of the mounting plate (202), respectively; the output end of the motor (301) is fixedly connected to a threaded column (302), the outer side of the threaded column (302) is threadedly connected to a threaded block (303), the inner front and rear sides of the threaded block (303) are rotatably connected to a telescopic block (304), the outer side of the telescopic block (304) passes through the mounting plate (202) and is fixedly connected to a clamping plate (305), the bottom of the threaded block (303) passes through the mounting plate (202), and a fixing component is arranged on the outer side of the clamping plate (305).

3. The bridge prefabricated component lifting device according to claim 1, characterized in that: The positioning mechanism (4) comprises a rotating column (405) and a belt (403), the two rotating columns (405) are respectively rotatably connected to the bottom of the support column (1), the outer side of the rotating column (405) is slidably connected to a connecting cover (407), the front and rear sides of the top of the connecting cover (407) are fixedly connected to a damper (406), the top of the damper (406) is fixedly connected to the support column (1), the middle part of the inner side of the rotating column (405) is fixedly connected to an electric telescopic rod (408), the bottom end of the electric telescopic rod (408) is fixedly connected to the connecting cover (407), and the front and rear sides of the inner side of the connecting cover (407) are rotatably connected to A walking wheel (409), the top end of the crossbeam (8) is fixedly connected to a motor (401), the output end of the motor (401) passes through the crossbeam (8) and is fixedly connected to a rotating wheel 1 (402), the left and right sides of the interior of the crossbeam (8) are both rotatably connected to rotating wheels 2 (404), the rotating wheel 2 (404) is transmission-connected to the rotating wheel 1 (402) via the belt (403), the bottom of the rotating wheel 2 (404) is fixedly connected to the support column (1), an observation assembly is provided on the inner side of the rotating column (405), a limit assembly is provided on the outer side of the rotating column (405), and a support assembly is provided on the bottom of the rotating column (405).

4. A bridge prefabricated component lifting device according to claim 1, characterized in that: The sealing assembly comprises a movable door (210), wherein two movable doors (210) are respectively arranged on the left and right sides of the top of the crossbeam (8), and hinges (211) are fixedly connected to the front and rear sides of the top of the movable door (210), and the movable door (210) is rotatably connected to the crossbeam (8) via the hinges (211).

5. The bridge prefabricated component lifting device according to claim 3, characterized in that: The fixing assembly comprises a protective pad (309), wherein two protective pads (309) are respectively fixedly connected to the outer bottom of the clamping plate (305), a spring (307) is fixedly connected to the outer side of the connecting block (306), and the other end of the spring (307) is fixedly connected to a positioning plate (308).

6. The bridge prefabricated component lifting device according to claim 1, characterized in that: The observation assembly comprises an indicator rod (412), wherein the indicator rod (412) is fixedly connected to the middle portion of the outer side of the rotating column (405), and a plurality of indicator grooves (413) are provided in the middle portion of the outer side of the supporting column (1).

7. The bridge prefabricated component lifting device according to claim 3, characterized in that: The limit assembly comprises a bidirectional threaded rod (414), the bidirectional threaded rod (414) being rotatably connected to the inner bottom of the support column (1), the outer front and rear sides of the bidirectional threaded rod (414) being threadedly connected to a baffle (415), and the outer side of the baffle (415) passing through the support column (1).

8. The bridge prefabricated component lifting device according to claim 3, characterized in that: The support assembly comprises a base (410), wherein the base (410) is fixedly connected to the bottom of the rotating column (405), and the top and rear sides of the base (410) are fixedly connected to guide rods (411), and the outer side of the guide rods (411) is slidably connected to the connecting cover (407).

9. The bridge prefabricated component lifting device according to claim 1, characterized in that: A controller (5) is fixedly connected to the top of the front side of the crossbeam (8); the controller (5) is electrically connected to the main hoist (201), the auxiliary hoist (212), the motor (301) and the motor (401), respectively; and a protective cover (6) is rotatably connected to the outer side of the controller (5).

10. The bridge prefabricated component lifting device according to claim 1, characterized in that: The top of the support column (1) is fixedly connected to a bracket (7), and the top of the bracket (7) is slidably connected to the crossbeam (8).

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