Auxiliary lifting device for ship maintenance

Abstract

The application belongs to the field of ship maintenance, and discloses an auxiliary lifting device for ship maintenance, which comprises a load-bearing support, the top of the load-bearing support is fixedly connected with a hydraulic push rod, the bottom end of the hydraulic push rod is fixedly connected with a lifting steel pipe, the bottom of the lifting steel pipe is fixedly connected with a lifting hook, the two sides of the lifting steel pipe and located inside the load-bearing support are fixedly connected with a fixed frame, the inside of the fixed frame is movably connected with a moving rod, and the bottom of the moving rod is fixedly connected with a lifting device. The cooperation of the double-shaft motor, the rotating rod, the belt, the driving wheel, the driven wheel, the screw rod, the second sliding block, the second sliding block, the moving plate, the arc block, the first gear, the second gear, the connecting shaft, the rotating block and the fixing structure can fix the outside and the inside of the lifting steel pipe, improve the stability when the lifting steel pipe drives the ship to move, and facilitate use.

Description

Technical Field

[0001] This invention belongs to the field of ship repair technology, and in particular relates to an auxiliary lifting device for ship repair. Background Technology

[0002] Ships are means of transportation that can navigate or anchor in waterways for transport or operations. They have different technical performance, equipment, and structural forms depending on their usage requirements. The shape of a ship is generally a streamlined envelope that helps overcome fluid resistance. Materials are constantly being updated with technological advancements. Early ships used natural materials such as wood, bamboo, and hemp, while modern ships are mostly made of steel, aluminum, fiberglass, acrylic, and various composite materials. Currently, when ships are lifted for maintenance, they are usually lifted by two sets of parallel steel wire ropes from a crane.

[0003] For example, Chinese patent application number CN2022204580129 discloses an auxiliary lifting device for ship maintenance, including a load-bearing bracket. A concave frame is fixedly installed on the top of the load-bearing bracket, and a hydraulic push rod is embedded and connected above the concave frame. The driving end of the hydraulic push rod is engaged with a lifting steel pipe, and an auxiliary lifting mechanism is provided on the upper inner side of the load-bearing bracket. The hydraulic push rod and the lifting steel pipe can drive the ship to rise and fall. After the lifting steel pipe rises a certain distance, it will drive the pallet, linkage column, and lifting device to move upward. The lifting device is used to clamp the two sides of the ship. This not only avoids the swaying of the ship when it is raised to a certain height, reducing the safety hazards to maintenance personnel, but also improves the stability of the contact between the internal block and the ship by setting anti-slip pads on the internal block.

[0004] However, during use, the hydraulic push rod and lifting steel pipe can drive the ship to rise and fall. Due to the large weight of the ship, the lifting steel pipe moves with the ship. After long-term use, the lifting steel pipe cannot be fixed and is prone to breakage, resulting in unstable lifting and making it inconvenient to use. Summary of the Invention

[0005] This invention addresses the problems of existing technologies that use hydraulic push rods and lifting steel pipes to raise and lower ships. Due to the significant weight of the ship, the lifting steel pipe moves with the ship, leading to instability and breakage over time, resulting in unstable lifting and inconvenience in use. The invention proposes the following technical solution: an auxiliary lifting device for ship repair, comprising a load-bearing bracket. A hydraulic push rod is fixedly connected to the top of the load-bearing bracket, and a lifting steel pipe is fixedly connected to the bottom of the hydraulic push rod. A hook is fixedly connected to the bottom of the lifting steel pipe. Fixed frames are fixedly connected to both sides of the lifting steel pipe, located inside the load-bearing bracket. A movable rod is movably connected inside the fixed frames, and a lifting device is fixedly connected to the bottom of the movable rod. A mounting plate is fixedly connected to the top of the load-bearing bracket, located at the fixed end of the hydraulic push rod. A fixed plate is fixedly connected to the outer surface of one side of the telescopic end of the hydraulic push rod. A dual-axis motor is fixedly connected to the top of the fixed plate. The output end of the dual-axis motor... A rotating rod is fixedly connected, with a fixed block rotatably connected to one end of the rotating rod. A driving wheel is fixedly connected to the outer surface of the rotating rod, and a belt is driven to the outer surface of the driving wheel. A driven wheel is driven to the inner wall of the belt on the side away from the driving wheel. A lead screw is fixedly connected to the middle of the driven wheel, and connecting plates are provided on both sides of the lead screw. A first slider is fixedly connected to the middle of the lead screw, and a moving plate is fixedly connected to the bottom of the first slider. A connecting rod is hinged to one outer surface of the moving plate, and an arc-shaped block is hinged to one end of the connecting rod. A second slider is fixedly connected to the bottom of the moving plate, and a sliding plate is slidably connected to the bottom of the second slider. A first gear is fixedly connected to the outer surface of the rotating rod near the lifting steel pipe, and a second gear meshes with the bottom of the first gear. A connecting shaft is fixedly connected to the middle of the second gear, and a fixed cylinder is fixedly connected to the outer surface of the connecting shaft. The fixed cylinder has a cavity inside, and a rotating block is fixedly connected inside the cavity and located on the outer surface of the connecting shaft. A fixing structure is provided between the rotating block and the fixed cylinder.

[0006] As a preferred embodiment of the above technical solution, the top of the load-bearing bracket is provided with a groove, the moving rod passes through the groove and is fixedly connected to the bottom of the mounting plate, and a rust removal device is provided at the bottom of the mounting plate and at the top of the arc-shaped block.

[0007] As a preferred embodiment of the above technical solution, the fixed block is fixedly connected to the top of the moving rod, there are two fixed blocks, the number of moving rods is the same as the number of fixed blocks, the bottom outer surface of the moving rod is fixedly connected to the connecting plate, and the end of the moving plate away from the moving rod is fixedly connected to the lifting steel pipe.

[0008] As a preferred embodiment of the above technical solution, a sliding groove is provided in the middle of the connecting plate, a fixed plate is fixedly connected to one side of the sliding groove, one side of the fixed plate is fixedly connected to the outer wall of the lifting steel pipe, one end of the screw is rotatably connected to the inner wall of the sliding groove, and the other end is rotatably connected to the outer surface of one side of the fixed plate, and the first slider is slidably connected to the inner walls on both sides of the sliding groove.

[0009] As a preferred embodiment of the above technical solution, both ends of the connecting plate and the sliding plate are located inside the fixed frame, both ends of the sliding plate are fixedly connected to the bottom end of the moving rod, the end of the sliding plate away from the moving rod is fixedly connected to the lifting steel pipe, the moving plate is located between the connecting plate and the sliding plate, and the moving plate and the arc-shaped block are symmetrically arranged with respect to the center of the lifting steel pipe.

[0010] As a preferred embodiment of the above technical solution, the rotating rod near the lifting steel pipe passes through the telescopic end of the hydraulic push rod, the inner wall of the fixed cylinder is provided with a moving groove, and both sides of the moving groove are provided with installation grooves. The fixed cylinder and the connecting shaft are located inside the lifting steel pipe, and a rotating plate is fixedly connected to the bottom of the connecting shaft. The rotating plate is rotatably connected to the inside of the lifting steel pipe.

[0011] As a preferred embodiment of the above technical solution, the fixed structure includes a movable block, which is movably connected to the movable groove. Connecting springs are fixedly connected to both sides of the movable block. One end of the connecting spring is fixedly connected to the inner wall of the mounting groove. A round protrusion is fixedly connected to one end of the movable block, and a bonding plate is fixedly connected to the other end of the movable block.

[0012] As a preferred embodiment of the above technical solution, one side of the bonding plate is arc-shaped, the round convexity abuts against the rotating block, the moving blocks are distributed in a central circular array around the fixed cylinder, the moving blocks are located inside the moving groove, and the round convexity is located inside the cavity.

[0013] As a preferred embodiment of the above technical solution, the rust removal device includes an electric telescopic rod, the top of which is fixedly connected to the bottom of the mounting plate. A movable ring is fixedly connected to the telescopic end of the electric telescopic rod. The movable ring is located on the outside of the lifting steel pipe. A support rod is fixedly connected to the inner wall of the movable ring. A rust removal block is fixedly connected to one end of the support rod. One side of the rust removal block is in contact with the outer surface of the lifting steel pipe.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. Through the coordinated use of a dual-axis motor, rotating rod, belt, drive wheel, driven wheel, lead screw, second slider, second slider, moving plate, arc block, first gear, second gear, connecting shaft, rotating block, and fixed structure, the rotating rod, driven by the dual-axis motor, drives the belt, drive wheel, driven wheel, and lead screw to rotate. This causes the moving plate to drive the arc block to fix both sides of the lifting steel pipe. The rotating rod drives the first gear, second gear, and connecting shaft to rotate, causing the rotating block to press against the fixed structure, thus fixing the interior of the lifting steel pipe. This ensures that both the exterior and interior of the lifting steel pipe are fixed, improving stability when the lifting steel pipe moves the ship and facilitating its use.

[0016] 2. By using the mounting plate, electric telescopic rod, moving ring, support rod and rust removal block, the electric telescopic rod pushes the moving block to move on the lifting steel pipe, so that the lifting steel pipe drives the support rod and rust removal block to move, which facilitates the rust removal block to remove rust from the outer surface of the lifting steel pipe, prevents the lifting steel pipe from breaking, and helps to improve the service life of the lifting steel pipe. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of an embodiment of the present invention is shown;

[0018] Figure 2 A structural diagram of the fixing frame according to an embodiment of the present invention is shown;

[0019] Figure 3 A front view of the lifting steel pipe according to an embodiment of the present invention is shown;

[0020] Figure 4 A structural diagram of the arc-shaped block according to an embodiment of the present invention is shown;

[0021] Figure 5 The internal structure diagram of the rising and falling light tube according to an embodiment of the present invention is shown;

[0022] Figure 6 An internal structural diagram of the fixing cylinder according to an embodiment of the present invention is shown;

[0023] Figure 7 A top view of the fixing cylinder according to an embodiment of the present invention is shown;

[0024] Figure 8 A structural diagram of the rust removal device according to an embodiment of the present invention is shown.

[0025] In the diagram: 1. Load-bearing bracket; 2. Hydraulic push rod; 3. Lifting steel pipe; 4. Fixed frame; 5. Moving rod; 6. Mounting plate; 7. Dual-axis motor; 8. Rotating rod; 9. Drive wheel; 10. Belt; 11. Driven wheel; 12. Lead screw; 13. Connecting plate; 14. First slider; 15. Moving plate; 16. Connecting rod; 17. Arc block; 18. Second slider; 19. Slide plate; 20. First gear; 21. Second gear; 22. Connecting shaft; 23. Fixed cylinder; 24. Rotating block; 25. Rust removal device; 26. Moving block; 27. Connecting spring; 28. Round convex; 29. ​​Adhesive plate; 251. Electric telescopic rod; 252. Moving ring; 253. Support rod; 254. Rust removal block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0027] This invention provides an auxiliary lifting device for ship repair, such as... Figure 1-5As shown, the auxiliary lifting device for ship repair includes a support frame 1. A hydraulic push rod 2 is fixedly connected to the top of the support frame 1. A lifting steel pipe 3 is fixedly connected to the bottom of the hydraulic push rod 2. A hook is fixedly connected to the bottom of the lifting steel pipe 3. Fixed frames 4 are fixedly connected to both sides of the lifting steel pipe 3 and inside the support frame 1. A movable rod 5 is movably connected inside the fixed frames 4. A lifting device is fixedly connected to the bottom of the movable rod 5. A mounting plate 6 is fixedly connected to the top of the support frame 1 and at the fixed end of the hydraulic push rod 2. A fixed plate is fixedly connected to one outer surface of the telescopic end of the hydraulic push rod 2. A dual-shaft motor 7 is fixedly connected to the top of the fixed plate. A rotating rod 8 is fixedly connected to the output end of the dual-shaft motor 7. A fixed block is rotatably connected to one end of the rotating rod 8. A drive wheel 9 is fixedly connected to the outer surface of the rotating rod 8. A belt 10 is driven by the outer surface of the drive wheel 9. The belt 10 is located away from the drive wheel 9. A driven wheel 11 is connected to the inner wall via a transmission. A lead screw 12 is fixedly connected to the middle of the driven wheel 11. Connecting plates 13 are provided on both sides of the lead screw 12. A first slider 14 is fixedly connected to the middle of the lead screw 12. A moving plate 15 is fixedly connected to the bottom of the first slider 14. A connecting rod 16 is hinged to one outer surface of the moving plate 15. An arc-shaped block 17 is hinged to one end of the connecting rod 16. A second slider 18 is fixedly connected to the bottom of the moving plate 15. A sliding plate 19 is slidably connected to the bottom of the second slider 18. A first gear 20 is fixedly connected to the outer surface of the rotating rod 8 near the lifting steel pipe 3. A second gear 21 meshes with the bottom of the first gear 20. A connecting shaft 22 is fixedly connected to the middle of the second gear 21. A fixed cylinder 23 is fixedly connected to the outer surface of the connecting shaft 22. A cavity is opened inside the fixed cylinder 23. A rotating block 24 is fixedly connected inside the cavity and located on the outer surface of the connecting shaft 22. A fixing structure is provided between the rotating block 24 and the fixed cylinder 23.

[0028] The dual-axis motor 7 is started, driving the rotating rod 8 to rotate. The rotating rod 8 then drives the drive wheel 9 to rotate, which in turn drives the belt 10 and the driven wheel 11 to rotate. This, in turn, drives the lead screw 12 to rotate, causing the lead screw 12 to move the first slider 14 towards the lifting steel pipe 3. The movement of the first slider 14 causes the moving plate 15 and the second slider 18 to move towards the lifting steel pipe 3, causing the connecting rod 16 to press against the arc-shaped block 17. This causes the arc-shaped block 17 to move and fit against the outer wall of the lifting steel pipe 3, thus fixing the outer wall of the lifting steel pipe 3. Simultaneously, the rotation of the rotating rod 8 drives the first gear 20 to rotate, which in turn drives the second gear 21 to rotate. The movement causes the second gear 21 to drive the connecting shaft 22 and the fixed cylinder 23 to rotate. When the connecting shaft 22 rotates, it drives the rotating block 24 to rotate. When the rotating block 24 rotates, it squeezes the fixed structure, causing the fixed structure to move towards the inner wall of the lifting steel pipe 3, thereby fixing the inner wall of the lifting steel pipe 3. Both the outer and inner walls of the lifting steel pipe 3 are fixed, which facilitates the stability of the lifting steel pipe 3 when it moves. After the lifting steel pipe 3 is fixed, the ship is placed under the load-bearing support 1, and the ship is placed on the hook on the lifting steel pipe 3 after contacting the ship with the hoisting rope. The hydraulic push rod 2 is activated to drive the lifting steel pipe 3 to rise, and the ship is moved upward to facilitate maintenance.

[0029] like Figure 1-3 As shown, the top of the load-bearing bracket 1 is provided with a groove, the moving rod 5 passes through the groove and is fixedly connected to the bottom of the mounting plate 6, the bottom of the mounting plate 6 and the top of the arc block 17 are provided with a rust removal device 25, the fixed block is fixedly connected to the top of the moving rod 5, there are two fixed blocks, the number of moving rods 5 is the same as the number of fixed blocks, the bottom outer surface of the moving rod 5 is fixedly connected to the connecting plate 13, and the end of the moving plate 15 away from the moving rod 5 is fixedly connected to the lifting steel pipe 3.

[0030] The mounting plate 6 facilitates the fixing of the movable rod 5. The movable rod 5 drives the lifting device to contact and fix the two sides of the ship to prevent the ship from swaying when moving upward. The fixing block facilitates the fixing of both ends of the rotating rod 8, so that the rotating rod 8 can rotate. The connecting plate 13 fixes the lead screw 12, so that the lead screw 12 can rotate to drive the first slider 14 and the movable plate 15 to move.

[0031] like Figure 3-4 As shown, a sliding groove is provided in the middle of the connecting plate 13, a fixed plate is fixedly connected to one side of the sliding groove, one side of the fixed plate is fixedly connected to the outer wall of the lifting steel pipe 3, one end of the screw rod 12 is rotatably connected to the inner wall of the sliding groove, and the other end is rotatably connected to the outer surface of one side of the fixed plate, and the first slider 14 is slidably connected to the inner walls on both sides of the sliding groove.

[0032] The slide groove facilitates the movement of the first slider 14 when the lead screw 12 rotates, so that the first slider 14 drives the moving plate 15 to move. The fixed plate is fixed to the lifting steel pipe 3, which facilitates the fixing of the connecting plate 13 to the lifting steel pipe 3, thus facilitating the movement of the moving plate 15 towards the lifting steel pipe 3 by the first slider 14.

[0033] like Figure 2-4 As shown, both ends of the connecting plate 13 and the sliding plate 19 are located inside the fixed frame 4. Both ends of the sliding plate 19 are fixedly connected to the bottom of the moving rod 5. The end of the sliding plate 19 away from the moving rod 5 is fixedly connected to the lifting steel pipe 3. The moving plate 15 is located between the connecting plate 13 and the sliding plate 19. The moving plate 15 and the arc block 17 are symmetrically arranged with respect to the center of the lifting steel pipe 3.

[0034] The slide plate 19 is fixed to the moving rod 5, which facilitates the movement of the second slider 18 on the slide plate 19 when the moving rod 5 moves. The slide plate 19 is fixed to the lifting steel pipe 3 to improve the stability of the movement of the second slider 18. The symmetrically arranged moving plate 15 and arc block 17 facilitate the moving plate 15 to drive the arc block 17 to fit against the outer wall of the lifting steel pipe 3, thereby fixing the outer wall of the lifting steel pipe 3, improving the stability of the lifting steel pipe 3, and reducing the vibration of the lifting steel pipe 3.

[0035] like Figure 4-6 As shown, the rotating rod 8 near the lifting steel pipe 3 passes through the telescopic end of the hydraulic push rod 2. The inner wall of the fixed cylinder 23 is provided with a moving groove, and both sides of the moving groove are provided with installation grooves. The fixed cylinder 23 and the connecting shaft 22 are located inside the lifting steel pipe 3. The bottom of the connecting shaft 22 is fixedly connected to a rotating plate, and the rotating plate is rotatably connected to the inside of the lifting steel pipe 3.

[0036] The rotating rod 8 drives the first gear 20 and the second gear 21 to rotate, thereby driving the connecting shaft 22 and the fixed cylinder 23 to rotate. The moving groove and the mounting groove facilitate the rotation of the connecting shaft 22 to drive the rotating block 24 to press the fixed structure, so that the fixed structure moves. The rotating plate facilitates the fixing of the connecting shaft 22, so that the connecting shaft 22 and the fixed cylinder 23 are fixed inside the lifting steel pipe 3, so that the fixed structure fixes the inner wall of the lifting steel pipe 3.

[0037] like Figure 5-7 As shown, the fixed structure includes a movable block 26, which is movably connected to the movable groove. Connecting springs 27 are fixedly connected to both sides of the movable block 26. One end of the connecting spring 27 is fixedly connected to the inner wall of the mounting groove. A round protrusion 28 is fixedly connected to one end of the movable block 26, and a bonding plate 29 is fixedly connected to the other end of the movable block 26. One side of the bonding plate 29 is arc-shaped. The round protrusion 28 abuts against the rotating block 24. The movable blocks 26 are distributed in a circular array around the center of the fixed cylinder 23. The movable blocks 26 are located inside the movable groove, and the round protrusion 28 is located inside the cavity.

[0038] The rotating shaft 22 drives the rotating block 24 to rotate. Since the rotating block 24 abuts against the round protrusion 28, when the rotating block 24 rotates, it squeezes the round protrusion 28, causing the round protrusion 28 to drive the moving block 26 to move to the outside of the moving groove. At the same time, the connecting spring 27 is compressed, causing the moving block 26 to drive the bonding plate 29 to fit against the inner wall of the lifting steel pipe 3. Since the moving blocks 26 are distributed in a circular array around the center of the fixed cylinder 23, the moving blocks 26 drive the bonding plate 29 to fix the inner wall of the lifting steel pipe 3, which helps to increase the stability of the lifting steel pipe 3.

[0039] like Figure 8 As shown, the rust removal device 25 includes an electric telescopic rod 251. The top of the electric telescopic rod 251 is fixedly connected to the bottom of the mounting plate 6. A movable ring 252 is fixedly connected to the telescopic end of the electric telescopic rod 251. The movable ring 252 is located on the outside of the lifting steel pipe 3. A support rod 253 is fixedly connected to the inner wall of the movable ring 252. A rust removal block 254 is fixedly connected to one end of the support rod 253. One side of the rust removal block 254 is in contact with the outer surface of the lifting steel pipe 3.

[0040] The electric telescopic rod 251 drives the moving ring 252 to move back and forth on the lifting steel pipe 3. Since the rust removal block 254 is in contact with the outer wall of the lifting steel pipe 3, when the moving ring 252 moves, the support rod 253 drives the rust removal block 254 to remove rust from the outer wall of the lifting steel pipe 3, clean the outer wall of the lifting steel pipe 3, prevent the lifting steel pipe 3 from breaking, and improve the service life of the lifting steel pipe 3.

[0041] Working principle: During use, the dual-axis motor 7 is started, driving the rotating rod 8 to rotate. The rotating rod 8 then drives the driving wheel 9 to rotate, which in turn drives the belt 10 and the driven wheel 11 to rotate. This, in turn, drives the lead screw 12 to rotate, causing the lead screw 12 to move the first slider 14 towards the lifting steel pipe 3. The movement of the first slider 14 causes the moving plate 15 and the second slider 18 to move towards the lifting steel pipe 3, thereby causing the connecting rod 16 to press against the arc-shaped block 17. This causes the arc-shaped block 17 to move and fit against the outer wall of the lifting steel pipe 3, fixing it in place. Simultaneously, the rotation of the rotating rod 8 drives the first gear 20 to rotate, which in turn drives the second gear 21 to rotate. 21 drives the connecting shaft 22 and the fixed cylinder 23 to rotate, thereby causing the rotating block 24 connected to the connecting shaft 22 to rotate. Since the moving block 26 is located inside the moving groove, the round protrusion 28 abuts against the rotating block 24. When the rotating block 24 rotates, the round protrusion 28 causes the moving block 26 to move to the outside of the moving groove. At the same time, the connecting spring 27 is compressed, causing the fitting plate 29 to move and fit against the inside of the lifting steel pipe 3, thus fixing the inside of the lifting steel pipe 3. After the lifting steel pipe 3 is fixed, the ship is placed under the load-bearing bracket 1, and after the hoisting rope contacts the ship, it is placed on the hook on the lifting steel pipe 3. The hydraulic push rod 2 is started to drive the lifting steel pipe 3 to rise, thus moving the ship upward for maintenance.

[0042] After maintenance is completed, the dual-axis motor 7 is driven to rotate in the reverse direction, causing the first slider 14 to move the moving block 26 away from the lifting steel pipe 3. This causes the arc-shaped block 17 to move to both sides of the lifting steel pipe 3, no longer adhering to the outer wall of the lifting steel pipe 3. When the arc-shaped block 17 moves away from the lifting steel pipe 3, the dual-axis motor 7 is stopped, and the electric telescopic rod 251 is started. The electric telescopic rod 251 drives the moving ring 252 to move back and forth on the lifting steel pipe 3. Since the rust removal block 254 is adhering to the outer wall of the lifting steel pipe 3, when the moving ring 252 moves, the support rod 253 drives the rust removal block 254 to remove rust from the outer wall of the lifting steel pipe 3, cleaning the outer wall of the lifting steel pipe 3, preventing the lifting steel pipe 3 from breaking, and improving the service life of the lifting steel pipe 3.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. An auxiliary lifting device for ship repair, comprising a load-bearing bracket, a hydraulic push rod fixedly connected to the top of the load-bearing bracket, a lifting steel pipe fixedly connected to the bottom end of the hydraulic push rod, a hook fixedly connected to the bottom of the lifting steel pipe, fixed frames fixedly connected to both sides of the lifting steel pipe and located inside the load-bearing bracket, a movable rod movably connected inside the fixed frames, a lifting device fixedly connected to the bottom of the movable rod, and a mounting plate fixedly connected to the top of the load-bearing bracket and located at the fixed end of the hydraulic push rod, characterized in that… A fixed plate is fixedly connected to one outer surface of the telescopic end of the hydraulic push rod. A dual-axis motor is fixedly connected to the top of the fixed plate. A rotating rod is fixedly connected to the output end of the dual-axis motor. A fixed block is rotatably connected to one end of the rotating rod. A drive wheel is fixedly connected to the outer surface of the rotating rod. A belt is driven to the outer surface of the drive wheel. A driven wheel is driven to the inner wall of the belt away from the drive wheel. A lead screw is fixedly connected to the middle of the driven wheel. Connecting plates are provided on both sides of the lead screw. A first slider is fixedly connected to the middle of the lead screw. A moving plate is fixedly connected to the bottom of the first slider. A connecting rod is hinged to one outer surface of the moving plate. An arc-shaped block is hinged to one end of the connecting rod. A second slider is fixedly connected to the bottom of the moving plate. A sliding plate is slidably connected to the bottom of the second slider. A first gear is fixedly connected to the outer surface of the rotating rod near the lifting steel pipe. A second gear meshes with the bottom of the first gear. A connecting shaft is fixedly connected to the middle of the second gear. A fixed cylinder is fixedly connected to the outer surface of the connecting shaft. A cavity is opened inside the fixed cylinder. A rotating block is fixedly connected to the cavity and located on the outer surface of the connecting shaft. A fixing structure is provided between the rotating block and the fixed cylinder. The rotating rod near the lifting steel pipe passes through the telescopic end of the hydraulic push rod. The inner wall of the fixed cylinder is provided with a moving groove, and both sides of the moving groove are provided with installation grooves. The fixed cylinder and the connecting shaft are located inside the lifting steel pipe. The bottom of the connecting shaft is fixedly connected to a rotating plate, and the rotating plate is rotatably connected to the inside of the lifting steel pipe. The fixed structure includes a movable block, which is movably connected to the movable groove. Connecting springs are fixedly connected to both sides of the movable block. One end of the connecting spring is fixedly connected to the inner wall of the mounting groove. A round protrusion is fixedly connected to one end of the movable block, and a bonding plate is fixedly connected to the other end of the movable block. One side of the bonding plate is arc-shaped, with a rounded convexity that abuts against the rotating block. The moving blocks are distributed in a circular array around the center of the fixed cylinder. The moving blocks are located inside the moving groove, and the rounded convexity is located inside the cavity.

2. The auxiliary lifting device for ship repair according to claim 1, characterized in that, The top of the load-bearing bracket has a groove, through which the moving rod passes and is fixedly connected to the bottom of the mounting plate. A rust removal device is provided at the bottom of the mounting plate and at the top of the arc-shaped block.

3. The auxiliary lifting device for ship repair according to claim 1, characterized in that, The fixed block is fixedly connected to the top of the moving rod. There are two fixed blocks. The number of moving rods is the same as the number of fixed blocks. The bottom outer surface of the moving rod is fixedly connected to the connecting plate. The end of the moving plate away from the moving rod is fixedly connected to the lifting steel pipe.

4. The auxiliary lifting device for ship repair according to claim 1, characterized in that, A sliding groove is provided in the middle of the connecting plate. A fixed plate is fixedly connected to one side of the sliding groove. One side of the fixed plate is fixedly connected to the outer wall of the lifting steel pipe. One end of the screw is rotatably connected to the inner wall of the sliding groove, and the other end is rotatably connected to the outer surface of one side of the fixed plate. The first slider is slidably connected to the inner walls on both sides of the sliding groove.

5. The auxiliary lifting device for ship repair according to claim 1, characterized in that, Both ends of the connecting plate and the sliding plate are located inside the fixed frame. Both ends of the sliding plate are fixedly connected to the bottom of the moving rod. The end of the sliding plate away from the moving rod is fixedly connected to the lifting steel pipe. The moving plate is located between the connecting plate and the sliding plate. The moving plate and the arc block are symmetrically arranged with respect to the center of the lifting steel pipe.

6. The auxiliary lifting device for ship repair according to claim 2, characterized in that, The rust removal device includes an electric telescopic rod, the top of which is fixedly connected to the bottom of the mounting plate. A movable ring is fixedly connected to the telescopic end of the electric telescopic rod. The movable ring is located on the outside of the lifting steel pipe. A support rod is fixedly connected to the inner wall of the movable ring. A rust removal block is fixedly connected to one end of the support rod. One side of the rust removal block is in contact with the outer surface of the lifting steel pipe.

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