A lifting device for assembling a bow

Abstract

The application discloses a hoisting device for ship bow assembly, and relates to the field of ship bow assembly hoisting. The hoisting device comprises a conveying table, symmetrically distributed conveying wheels are arranged on the bottom of the conveying table, symmetrically distributed fixing frames are fixedly connected to the conveying table, symmetrically distributed motors are arranged on the conveying table, symmetrically distributed rotating shafts are rotatably connected to the conveying table on the side close to the motors, and the output shafts of the motors are connected with the adjacent rotating shafts through couplings. The hoisting device realizes constant tension cable winding and unwinding through a pressure sensor for real-time monitoring of steel cable tension and a worm gear transmission group, thereby ensuring the safety and stability of the hoisting process. An air pump, a piston rod and a damping spring jointly form an air-spring composite buffer system, which can effectively absorb sudden impact load and reduce the swing amplitude of the ship bow. The system can automatically adjust the buffer strategy according to different lateral wind strengths, thereby ensuring the smooth progress of the hoisting operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship bow assembly and hoisting, in particular to a hoisting device for ship bow assembly. BACKGROUND

[0002] With the rapid development of shipbuilding technology, modular assembly process has become the mainstream direction of modern shipbuilding industry. As a key structural component of the ship, the precise hoisting of the pre-fabricated ship bow is crucial to the overall performance of the ship.

[0003] However, in the modular hoisting operation of the ship bow, environmental disturbance control is a key technical difficulty. Strong wind load (especially lateral wind) can cause instability of the hoisting system dynamics, which is specifically manifested as: the multi-body coupled system formed by the crane-cable-ship bow module produces nonlinear oscillation under wind load excitation, resulting in deviation of the module docking accuracy; at the same time, the tension state of the cable directly affects the wind resistance of the system, and excessive tightening can cause stress concentration and fatigue damage, while insufficient tension can lead to loss of control of the module pose. The existing windproof measures rely on meteorological window selection and passive cable reinforcement, and lack of in-depth research on active control mechanism of cable tension, making it difficult to balance structural safety and operation efficiency.

[0004] Based on the above situation, there is an urgent need for a hoisting device for ship bow assembly, which can effectively deal with the problem of dynamic instability caused by strong wind load, and realize active control of cable tension. SUMMARY

[0005] In order to overcome the shortcomings of the existing ship bow hoisting technology, such as insufficient docking accuracy, high risk of structural fatigue and low operation efficiency caused by passive single cable tension control and loss of control of module oscillation due to strong wind disturbance, the present application provides a hoisting device for ship bow assembly.

[0006] A hoisting device for ship bow assembly, comprising a conveying table, the bottom of the conveying table is provided with symmetrically distributed conveying wheels, the conveying table is fixedly connected with symmetrically distributed fixed frames, the conveying table is provided with symmetrically distributed motors, the conveying table is rotatably connected with symmetrically distributed shafts near the side of the motor, the output shaft of the motor is connected with the adjacent shaft through a shaft coupling, the symmetrically distributed shafts are fixedly connected with worms, and the conveying table is rotatably connected with symmetrically distributed winding shafts, which are fixedly connected with symmetrically distributed cable winding drums, and the end portions near the shafts are fixedly connected with worms.

[0007] Further, the worm and the adjacent worm are meshed with each other to form a gear transmission system.

[0008] Further, each fixed frame is provided with symmetrically distributed air pumps, a piston rod is slidably connected in each air pump, a damping spring is connected between each piston rod and the adjacent air pump, the damping spring is wound around the adjacent piston rod, a tension control frame is connected between adjacent piston rods, and the tension control frame slides in the adjacent fixed frame.

[0009] Further, each air pump of the uniformly distributed air pumps is provided with a pair of exhaust pipes, and a plurality of air holes are formed in the exhaust pipes in the circumferential direction.

[0010] Further, a locking tooth is fixedly connected to each of the symmetrically distributed piston rods, a cover plate that controls the opening and closing of the exhaust pipe is rotatably connected to the exhaust pipe of the air pump, a torsional spring is connected between the cover plate and the adjacent exhaust pipe, the torsional spring is wound around the adjacent exhaust pipe, a limiting frame is rotatably connected between adjacent cover plates, and the limiting frame vertically slides on the adjacent air pump.

[0011] Further, a rodless air cylinder is symmetrically arranged on the side wall of the conveying table, a sliding block is arranged on the rodless air cylinder, a symmetrically distributed winding shaft is rotatably connected to the conveying table, a filter cloth is wound around the symmetrically distributed winding shaft, a fixed cylinder is symmetrically arranged on the conveying table, a spring is arranged in the fixed cylinder, the movable end of the spring is fixedly connected to the adjacent winding shaft, and the movable end of the filter cloth is fixedly connected to the adjacent sliding block.

[0012] Further, a telescopic rod is fixedly connected to the conveying table on the side close to the rodless air cylinder, a return spring (not shown) is arranged between the telescopic end and the fixed end of the telescopic rod, a sliding block is fixedly connected to the telescopic end of the telescopic rod and located directly below the adjacent sliding block, a symmetrically distributed rotating rod is rotatably connected to the conveying table, and a connecting rod is rotatably connected between the rotating rod and the adjacent sliding block.

[0013] Further, a wind speed tester is arranged on the top of the conveying table.

[0014] Further, the wind speed tester and the rodless air cylinders are electrically connected through a control module.

[0015] Further, a plurality of lifting rings for fixing the steel cable are arranged on the side close to each other of the tension control frame.

[0016] Beneficial effects: The steel cable tension is monitored in real time through the pressure sensor, and the constant tension cable winding and unwinding is realized through the worm and gear transmission group, so that the safety and stability of the hoisting process are ensured; the air pump, the piston rod and the damping spring jointly form an air-spring composite buffer system, which can effectively absorb sudden impact load and reduce the amplitude of ship bow shaking; the system can automatically adjust the buffer strategy according to different intensity of lateral wind, so that the hoisting operation is smoothly carried out.

[0017] The application realizes all-round protection from external wind blocking to internal support through linkage design between the rodless air cylinder, the sliding block, the filter cloth, the telescopic rod, the sliding block, the connecting rod and the rotating rod, improves the hoisting efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective structural schematic view of the application.

[0019] Figure 2 It is a perspective structural sectional view of the application.

[0020] Figure 3 It is a perspective structural sectional view of the tension regulating frame, the inflator, the piston rod and other components of the application.

[0021] Figure 4 It is a perspective structural schematic view of the cover plate, the limiting frame, the torsional spring and other components of the application.

[0022] Figure 5 It is a perspective structural sectional view of the spring, the locking tooth and the cover plate and other components of the application.

[0023] Figure 6 It is a perspective structural schematic view of the fixed cylinder, the winding shaft and the filter cloth and other components of the application.

[0024] Figure 7 It is a perspective structural sectional view of the fixed cylinder, the winding shaft and the filter cloth and other components of the application.

[0025] Figure 8 It is a perspective structural schematic view of the sliding block, the connecting rod and the rotating rod and other components of the application.

[0026] Figure 9 It is a perspective structural schematic view of the rodless air cylinder, the sliding block and the connecting rod and other components of the application.

[0027] The marks of various components in the drawings are as follows: 101: conveying table, 102: conveying wheel, 103: fixed frame, 104: motor, 105: rotating shaft, 106: winding shaft, 107: worm, 108: worm wheel, 109: steel cable winding cylinder, 110: tension regulating frame, 201: inflator, 202: piston rod, 203: damping spring, 204: locking tooth, 205: cover plate, 206: limiting frame, 207: torsional spring, 301: rodless air cylinder, 302: fixed cylinder, 303: winding shaft, 304: filter cloth, 305: clockwork, 401: telescopic rod, 402: sliding block, 403: connecting rod, 404: rotating rod, 501: wind speed tester. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application with reference to the specific embodiments and the accompanying drawings. It should be understood that the description is only exemplary and is not intended to limit the scope of the present application. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0029] Embodiment 1: A lifting device for ship bow assembly, as shown in Figure 1 and Figure 2 , comprising a conveying table 101 as a bearing main body, for providing a stable support platform to realize the conveying of the ship bow, the bottom of the conveying table 101 is provided with symmetrically distributed conveying wheels 102 for assisting the movement of the conveying table 101 to ensure the stability of the overall structure during lifting, the conveying table 101 is fixedly connected with symmetrically distributed fixed frames 103 for providing installation space, the conveying table 101 is provided with symmetrically distributed motors 104, the conveying table 101 near the side of the motor 104 is rotatably connected with symmetrically distributed rotating shafts 105, the output shaft of the motor 104 is connected with the adjacent rotating shaft 105 through a shaft coupling to transmit power to the subsequent transmission mechanism, the symmetrically distributed rotating shafts 105 are each fixedly connected with a worm 107, the conveying table 101 is rotatably connected with symmetrically distributed winding shafts 106, and the symmetrically distributed winding shafts 106 are each fixedly connected with a steel cable winding drum 109 for winding the steel cable to ensure the orderly winding and unwinding of the steel cable, and the end of the rotating shaft 105 is fixedly connected with a worm gear 108, the worm 107 and the adjacent worm gear 108 are meshed with each other to form a gear transmission system to transmit power and realize accurate control.

[0030] As shown in Figure 3 and Figure 5 , each fixed frame 103 is provided with symmetrically distributed air pumps 201, each of which is slidably connected with a piston rod 202 for changing the torque distribution by sliding to adjust the tension of the steel cable, and the piston rod 202 and the adjacent air pump 201 are connected with a damping spring 203, the damping spring 203 is wound around the adjacent piston rod 202, and the adjacent piston rods 202 are connected with a tension control frame 110, each tension control frame 110 is provided with a pressure sensor inside to monitor the tension value of the steel cable winding drum 109 in real time and is linked with the control module of the motor 104, when the tension exceeds the set threshold value, the rotating speed of the winding shaft 106 is automatically adjusted through the worm gear 108 and the worm 107 transmission group to realize the constant tension winding and unwinding of the cable, and the tension control frame 110 slides in the adjacent fixed frame 103, a pair of exhaust pipes are provided on the uniformly distributed air pumps 201, a plurality of air holes are formed in the circumferential direction of the exhaust pipes, and a plurality of lifting rings for fixing the steel cable are provided on the side of the tension control frame 110 close to each other to facilitate the implementation of lifting operation.

[0031] As shown in Figure 3 , Figure 4And Figure 5 As shown, the symmetrically distributed piston rods 202 are each fixedly connected with a locking tooth 204, and the exhaust pipes of the air pump 201 are each rotationally connected with a cover plate 205 for controlling the opening and closing of the exhaust pipe, so as to adjust the exhaust volume according to actual needs and optimize the transmission efficiency. The cover plate 205 is connected with the adjacent exhaust pipe through a torsional spring 207, the torsional spring 207 is wound around the adjacent exhaust pipe, the adjacent cover plates 205 are rotationally connected with a limiting frame 206, and the limiting frame 206 vertically slides on the adjacent air pump 201.

[0032] Firstly, the conveying table 101 is usually installed on a predetermined track and can move along a predetermined path, so as to realize frequent movement of the hoisting device in a fixed area. The conveying wheel 102 can roll back and forth in the predetermined track, so as to ensure the flexibility of the hoisting device. Through the remote control system of the crane, the operator can accurately control the hoisting device at a safe distance, which can not only significantly improve the work efficiency, but also effectively reduce the risk of human error.

[0033] Secondly, the steel cable winding drum 109 is wound with a steel cable, and the steel cable is provided with a hook. When the bow of the ship needs to be hoisted to a specified position, the hook on the steel cable is first fixed at the corresponding position of the bow of the ship. The control motor 104 drives the rotating shaft 105 to rotate, and then drives the winding shaft 106 to rotate through the worm gear 108 and the worm 107 transmission group, which synchronously drives the steel cable winding drum 109 to rotate. The steel cable winding drum 109 winds the steel cable, so as to stably hoist the bow of the ship.

[0034] Subsequently, through the remote control system of the crane, the conveying table 101 is moved to the specified position along the predetermined track. The control motor 104 drives the rotating shaft 105 to reverse, and then drives the winding shaft 106 and the steel cable winding drum 109 to reverse through the worm gear 108 and the worm 107 transmission group, so as to release the steel cable and lower the bow of the ship to the specified position. In the process of hoisting the bow of the ship, in order to enhance the wind resistance, multiple steel cables need to be tied from the lower part of the bow of the ship, and the movable ends of the steel cables are fixed on the corresponding lifting rings of the tension control frame 110. At this time, the bow of the ship is pulled from four directions, forming a stable force structure.

[0035] When the bow of the ship is subjected to lateral wind force, it will sway forward and backward, and then pull the corresponding tension control frame 110 through the steel cable. The movement of the tension control frame 110 drives the piston rod 202 to move outward, and the damping spring 203 deforms correspondingly. The outward moving piston rod 202 drives the locking tooth 204 on it to move outward, so that the gas in the air pump 201 is compressed and discharged through the air holes on the exhaust pipe. During the swaying of the bow of the ship, the continuous deformation and reset of the damping spring 203 can effectively reduce the swaying amplitude. The air pump 201, the piston rod 202 and the damping spring 203 together form a gas-spring composite buffer system, which can absorb sudden impact load (such as the swaying of the hoisted object), and ensure the relative stability of the bow of the ship during hoisting.

[0036] When the lateral wind force is large enough, the amplitude of the ship bow will increase significantly, at this time, the piston rod 202 moves outward at a faster speed, the gas in the air pump 201 is compressed sharply, and it is difficult to meet the demand by exhausting through the air hole alone. The compressed gas will rush off the cover plate 205, causing it to flip upward, driving the limiting frame 206 to move upward, and at the same time, the torsional spring 207 is twisted. The upward moving limiting frame 206 will be clamped in the teeth of the locking tooth 204, locking the position of the locking tooth 204, so that the piston rod 202 and the tension control frame 110 remain relatively stationary. At this time, the ship bow affected by the lateral wind force will act on the tension control frame 110 through the steel cable. Since the tension control frame 110 is internally installed with a pressure sensor, when the tension exceeds the set threshold, the automatic adjustment of the winding shaft 106 rotating speed is realized through the worm gear 108 and the worm 107 transmission group, realizing constant tension winding and unwinding of the steel cable.

[0037] When the lateral wind force decreases, the amplitude of the ship bow decreases, the piston rod 202 moves outward at a slower speed, and the compression speed of the gas in the air pump 201 also slows down accordingly, which can be discharged through the air hole. Under the action of the torsional spring 207, the cover plate 205 flips down and resets, driving the limiting frame 206 to move down and reset. The limiting frame 206 no longer locks the locking tooth 204, restoring its ability to move synchronously with the piston rod 202.

[0038] In summary, the steel cable tension is monitored in real time by the pressure sensor, and the constant tension winding and unwinding of the cable is realized by the worm gear 108 and the worm 107 transmission group, ensuring the safety and stability of the lifting process. The air pump 201, the piston rod 202 and the shock absorbing spring 203 form a gas-spring composite buffer system, which can effectively absorb sudden impact load and reduce the amplitude of the ship bow. The system can automatically adjust the buffer strategy for different intensity of lateral wind, ensuring the smooth progress of the lifting operation.

[0039] Example 2: Based on example 1, as shown in Figure 6 and Figure 7 The side wall of the conveying table 101 is installed with symmetrical distribution of rodless air cylinders 301, which are provided with sliding blocks for adjusting the position. The conveying table 101 is rotatably connected with symmetrical distribution of winding shafts 303, and the winding shafts 303 are wound with filter cloths 304 for blocking the lateral wind force. The conveying table 101 is fixedly connected with symmetrical distribution of fixed cylinders 302, which are provided with clockwork 305, the movable end of the clockwork 305 is fixedly connected with the adjacent winding shaft 303 for driving the winding shaft 303 to rotate and reset, and the movable end of the filter cloth 304 is fixedly connected with the adjacent sliding block for precise control through sliding adjustment.

[0040] As shown in Figure 8 and Figure 9As shown, the conveying table 101 is fixed with telescopic rods 401 on one side close to the rodless air cylinder 301, and a return spring (not shown inside) is arranged between the telescopic end and the fixed end of the telescopic rod 401. The telescopic end of the telescopic rod 401 is fixed with a sliding block 402, which is located just below the adjacent sliding block. The conveying table 101 is rotatably connected with symmetrical distributed rotating rods 404. The rotating rod 404 is rotatably connected with the connecting rod 403 between the adjacent sliding block 402, for realizing the connecting rod transmission.

[0041] As shown in the figure, Figure 1 The top of the conveying table 101 is provided with a wind speed tester 501 for real-time monitoring of the environmental wind speed and providing reference data for hoisting operation. The wind speed tester 501 is electrically connected with the four rodless air cylinders 301 through the control module, and the working state of the rodless air cylinder 301 is adjusted according to the wind speed.

[0042] When the lateral wind speed exceeds the threshold value set by the wind speed tester 501, the system will control the rodless air cylinder 301 to drive the sliding block to move downward, so as to drive the filter cloth 304 to be pulled open downward, and the spring 305 is deformed through the winding shaft 303. The pulled open filter cloth 304 can effectively block the lateral wind force and reduce the interference of the hoisting system. When the sliding block moves downward and contacts with the sliding block 402, the sliding block will drive the sliding block 402 to move downward, and the telescopic rod 401 will shrink downward, and the return spring inside the telescopic rod 401 will be deformed. The sliding block 402 moving downward drives the rotating rod 404 to deflect inward through the connecting rod 403. The inward deflected rotating rod 404 will form internal support for the unfolded filter cloth 304, avoiding excessive deformation or damage of the filter cloth 304 due to strong wind.

[0043] When the lateral wind speed is lower than the threshold value set by the wind speed tester 501, the system will control the rodless air cylinder 301 to drive the sliding block to move upward and reset. Under the elastic force of the spring 305, the winding shaft 303 is reversed to wind the filter cloth 304. At the same time, under the elastic force of the return spring, the telescopic rod 401 drives the sliding block 402 to move upward and reset, and drives the rotating rod 404 to deflect outward and reset through the connecting rod 403, so as to restore the initial state. In summary, the lateral wind speed is monitored in real time by the wind speed tester 501, and the system can automatically judge whether to trigger the strong lateral wind coping mechanism to ensure the safety of the hoisting process. The linkage design between the rodless air cylinder 301, the sliding block, the filter cloth 304, the telescopic rod 401, the sliding block 402, the connecting rod 403 and the rotating rod 404 realizes the all-round protection from external wind blocking to internal support, and improves the hoisting efficiency.

[0044] Although the present application has been described in detail with reference to the above embodiments, it is apparent to those skilled in the art that various changes or modifications can be made to the present application without departing from the principles and spirit of the application as defined in the claims. Therefore, the detailed description of the disclosed embodiments is merely intended to explain the present application, and is not intended to limit the scope of protection of the present application, which is defined by the content of the claims.

Claims

1. A lifting device for assembling a bow of a ship, comprising a conveying table (101) as a bearing main body, the bottom of the conveying table (101) is provided with symmetrically distributed conveying wheels (102), characterized in that: The fixed frame (103) is symmetrically arranged on the conveying table (101), and the motor (104) is symmetrically arranged on the conveying table (101). The rotating shaft (105) is rotatably connected to the conveying table (101) on the side close to the motor (104), and the output shaft of the motor (104) is connected to the adjacent rotating shaft (105) through a shaft coupling. The worm (107) is fixed to the symmetrically arranged rotating shaft (105). The winding shaft (106) is rotatably connected to the conveying table (101), and the steel cable winding drum (109) is symmetrically arranged on the winding shaft (106). The worm gear (108) is fixed to the end of the rotating shaft (105). The worm (107) and the adjacent worm gear (108) are meshed with each other to form a gear transmission system. The inflator (201) is symmetrically arranged in each fixed frame (103), and the piston rod (202) is slidably connected in the inflator (201). The damping spring (203) is connected between the piston rod (202) and the adjacent inflator (201), and the damping spring (203) is wound around the adjacent piston rod (202). The tension control frame (110) is connected between the adjacent piston rods (202) and slidably arranged in the adjacent fixed frame (103). A pair of exhaust pipes are arranged on the uniformly distributed inflator (201), and a plurality of air holes are formed in the exhaust pipes in the circumferential direction. The locking teeth (204) are fixed to the symmetrically arranged piston rods (202). The cover plate (205) is rotatably connected to the exhaust pipe of the inflator (201) to control the opening and closing of the exhaust pipe. The torsional spring (207) is connected between the cover plate (205) and the adjacent exhaust pipe, and the torsional spring (207) is wound around the adjacent exhaust pipe. The adjacent cover plates (205) are rotatably connected to the limiting frame (206), and the limiting frame (206) is vertically slidably arranged on the adjacent inflator (201). The limiting frame (206) is locked in the tooth of the locking teeth (204) when the limiting frame (206) moves upward, and the position of the locking teeth (204) is locked.

2. A lifting device for assembling a bow of a ship according to claim 1, characterized in that The rodless cylinder (301) is symmetrically arranged on the side wall of the conveying table (101), and the sliding block is arranged on the rodless cylinder (301). The winding shaft (303) is rotatably connected to the conveying table (101), and the filter cloth (304) is wound around the symmetrically arranged winding shaft (303). The fixed cylinder (302) is symmetrically arranged on the conveying table (101), and the clock spring (305) is arranged in the fixed cylinder (302). The movable end of the clock spring (305) is fixed to the adjacent winding shaft (303), and the movable end of the filter cloth (304) is fixed to the adjacent sliding block.

3. A lifting device for assembling a bow of a ship according to claim 2, characterized in that: The telescopic rod (401) is fixed to the side of the conveying table (101) close to the rodless cylinder (301), and the return spring is arranged between the telescopic end and the fixed end of the telescopic rod (401). The sliding block (402) is fixed to the telescopic end of the telescopic rod (401), and the sliding block (402) is located below the adjacent sliding block. The rotating rod (404) is symmetrically arranged on the conveying table (101), and the connecting rod (403) is rotatably connected between the rotating rod (404) and the adjacent sliding block (402).

4. A lifting device for assembling a bow of a ship according to claim 3, characterized in that: The top of the conveying table (101) is provided with a wind speed tester (501).

5. A lifting device for assembling a bow of a ship according to claim 4, characterized in that: The wind speed tester (501) and each rodless cylinder (301) are electrically connected through a control module.

6. A lifting device for assembling a bow of a ship according to claim 5, characterized in that: The tension control frame (110) is provided with a plurality of lifting rings for fixing the steel cable on the side close to each other.

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