Equipment for ship maintenance

Abstract

The invention provides ship maintenance equipment, which belongs to the technical field of ship equipment and comprises a track, a directional traction mechanism, a maintenance sliding table, a lifting frame, a tool mounting seat and a maintenance tool, the maintenance sliding table is installed on the rail, the directional traction mechanism is used for driving the maintenance sliding table to slide along the rail, the maintenance sliding table comprises a sliding table, a rotating table and a rotating seat, the sliding table is installed on the rail, the rotating table is installed on the upper surface of the sliding table, the rotating seat is installed on the upper surface of the rotating table, and the lifting frame is installed on the rotating seat; the lifting frame comprises a supporting frame and a moving frame, the moving frame is slidably mounted in a sliding groove of the supporting frame, a sliding groove is formed in the front side face of the lifting frame, a tool mounting base is slidably mounted in the sliding groove, and a maintenance tool is mounted on the upper surface of the tool mounting base. Large cracks or holes in the side face of a ship can be repaired in the ship forming process.

Description

Technical Field

[0001] The invention belongs to the technical field of ship equipment, and in particular relates to equipment for ship maintenance. Background Art

[0002] The sailing environment of ships is rivers and ocean currents. Ships float on the water surface with their bottoms sunk below the water surface. It is inevitable that ships will be damaged during long-term sailing. Ship machinery is large in size, and internal circuit maintenance can be carried out inside the ship, while external damage to the ship can only be repaired by docking at the pier using professional lifting equipment. When carrying out maintenance, ladders, lifting platforms and other tools are usually required as auxiliary tools to facilitate maintenance work on larger ship machinery or higher ship machinery.

[0003] If a major collision occurs during a ship's route, causing a large crack or hole to appear on one side of the ship and water to enter, it may cause the ship to sink in severe cases. The size of the leaking hole in the ship determines the time required for the sinking process. If the hole is large, the ship may take in water and sink within a day. If the hole is small, it will also sink if it is not repaired within a few days. Therefore, repairing external damage to ocean-going ships is an issue that needs to be addressed. Therefore, modern manufacturing equipment is urgently needed for repair work during the ship's route, which is of certain significance for future ships sailing in the ocean or even into the Arctic Ocean.

[0004] For long-distance ships, the docking port needs to be determined according to the route, and the damage to the ship often occurs during the voyage. Sometimes the ship is damaged on the surface due to collision with floating objects or large fish at sea, and it is necessary to change the current itinerary and choose a nearby dock for docking and maintenance. The maintenance process also takes a lot of time, which has a great impact on the transportation of goods, especially for goods with a certain transportation period. And sometimes the damage to the ship is small at the beginning of the collision, but often due to the expansion of the damage during the journey, it will also cause certain losses. If the damage can be repaired in time at the beginning of the collision, it can avoid additional losses caused by other factors such as seawater erosion. Especially for some minor damages, if they can be repaired during the voyage of the ship, it can not only save a lot of time for docking and maintenance, but also avoid the expansion of damage during the voyage.

[0005] Therefore, how to carry out external maintenance conveniently and quickly while the ship is sailing is a technical problem that needs to be solved at present. The first thing to be solved is how to achieve feasible external maintenance processing, such as fixing the maintenance equipment and carrying the maintenance tools, and it is necessary to overcome the problem of the stability of the maintenance process affected by the left and right swing of the ship in the water. Summary of the invention

[0006] The present invention aims at the problems in the prior art, and the technical solution adopted in the present application is: a ship maintenance equipment, comprising: a track, a directional traction mechanism, a maintenance slide, a lifting frame, a tool mounting seat and a maintenance tool; A maintenance slide is installed on the track, and the maintenance slide is driven to slide along the track by a directional traction mechanism. A lifting frame is installed on the maintenance slide, and the maintenance slide is used to adjust the angle of the lifting frame. A tool mounting seat is installed on the lifting frame, and the lifting frame is used to adjust the height of the tool mounting seat. A maintenance tool is installed on the tool mounting seat, and the maintenance tool is used to perform maintenance operations on the area to be repaired on the side of the ship; The maintenance slide includes a sliding table, a rotating table and a rotating seat. The sliding table is installed on the track, the rotating table is installed on the upper surface of the sliding table, the rotating seat is installed on the upper surface of the rotating table, and the lifting frame is installed on the rotating seat. The rotating table can rotate along the X axis, and the rotating seat can rotate along the Y axis. The X axis is perpendicular to the Y axis. The lifting frame includes a supporting frame and a mobile frame. The mobile frame is slidably installed in a slide groove of the supporting frame. The mobile frame is lifted up and down along the slide groove of the supporting frame by a hydraulic lifting cylinder. A sliding groove is provided on the front side of the lifting frame. A tool mounting seat is slidably installed in the sliding groove. A maintenance tool is installed on the upper surface of the tool mounting seat.

[0007] Furthermore, the track includes a plurality of connectable rectangular brackets, the surfaces of which are provided with long steel plates with grooves, and the plurality of rectangular brackets are connected and assembled into a complete track, and the track installation path is set according to the location and structure of the repair area.

[0008] Furthermore, one end of the directional traction mechanism is connected to the hoisting drum through a traction cable, and the other end of the directional traction mechanism is connected to the maintenance slide through a traction cable. The hoisting drum is driven by a motor, and a traction cable is wound around the hoisting drum. The traction cable passes through the directional traction mechanism and is connected to the maintenance slide for adjusting the position of the maintenance slide on the track. The directional traction mechanism is used to adjust the direction of the traction cable.

[0009] Furthermore, the directional traction mechanism includes a shell, a mounting base, a limit plate, a pulley, and a limit telescopic part. The shell is docked with the mounting base. The mounting base is provided with mounting holes and fasteners. The fasteners are passed through the mounting holes and docked with the mounting grooves provided on the track. The mounting base is used to fix the positioning mechanism to one end of the track. The limit plate, pulley, and limit telescopic part are installed in the shell from top to bottom in sequence.

[0010] Furthermore, the limit plate includes a limit shaft and a limit motor, one end of the limit shaft is connected to the output shaft of the limit motor, and the other end of the limit shaft is installed with an elliptical cavity. The limit motor is rotated to adjust the angle of the elliptical cavity to limit the pulley shaft in the elliptical cavity. Under normal rotation, the pulley shaft is located inside the elliptical cavity at a set distance from the center. The angle of the elliptical cavity is adjusted by the motor, and friction is formed between the side of the elliptical cavity and the pulley shaft, thereby stopping the pulley shaft from rotating.

[0011] Furthermore, the pulley is fixed in the shell by a pulley shaft, and the pulley rotates around the pulley shaft. A groove is provided on the side of the pulley, and the groove is used to install the traction cable. A limit ring is provided on the upper side of the groove, and one end of the limit ring is connected to the limit telescopic rod. The limit telescopic rod adopts a hydraulic telescopic cylinder, and the limit ring is driven to move up and down by the telescopic movement of the output shaft of the hydraulic telescopic rod, thereby providing downward pressure on the traction cable in the groove, thereby limiting the position of the traction cable.

[0012] Furthermore, the lifting frame includes a supporting frame and a mobile frame. The mobile frame is slidably installed in a slide groove of the supporting frame. The mobile frame is lifted up and down along the slide groove of the supporting frame by a hydraulic lifting cylinder. A sliding groove is provided on the front side of the lifting frame. A tool mounting seat is slidably installed in the sliding groove. A rack-shaped structure is provided on the bottom surface of the sliding groove.

[0013] Furthermore, the maintenance slide includes a sliding table, a rotating table and a rotating seat. The sliding table is a rectangular shell structure. The front and rear end surfaces of the sliding table are provided with traction rings, the traction rings are connected to one end of the traction cable, the left and right sides of the sliding table are provided with slide grooves, the slide grooves are installed in cooperation with the slide rails, and the sliding table is provided with a braking structure. The braking structure adopts a brake, and the brake adopts a hydraulic cylinder to drive and clamp two rectangular brake pads located on both sides of the track to fix the position of the sliding table and the slide rail; a rotating motor is installed inside the rectangular shell structure, and the output shaft of the rotating motor is connected to the reduction gear box, and the first output shaft of the reduction gear box is connected to the rotating table to drive the rotating table to rotate along the X-axis, and the second output shaft of the reduction gear box is connected to the rotating seat through the bevel gear transmission structure to drive the rotating seat to rotate along the Y-axis.

[0014] Furthermore, a camera is installed on the tool mounting base, which collects images of the maintenance area and wirelessly transmits them to a computer or a wireless remote controller for display. Personnel on the ship deck use the camera to observe the maintenance area and operate maintenance tools to perform operations.

[0015] Furthermore, a rack-shaped structure is provided on the bottom surface of the sliding groove, and a gear that cooperates with the rack-shaped structure is provided in the tool mounting seat. The gear cooperates with a motor installed inside the tool mounting seat to slide up and down along the sliding groove.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: The ship maintenance equipment adopted by the present invention comprises: a track, a directional traction mechanism, a maintenance slide, a lifting frame, a tool mounting seat and a maintenance tool. When the ship needs to be repaired, the track is first laid out according to the damaged position and size of the ship. The track is applied to the surface of the ship and fastened by welding or bolts, so that the entire maintenance equipment can be adjusted as the ship shakes. The directional traction mechanism, the maintenance slide and the lifting frame are installed on the track. The track can be used to install them at a more suitable position, and the track is used to move them to a designated area. The rotating table and the rotating seat of the maintenance slide are set, so that the lifting frame installed on its upper surface has two degrees of freedom of the X-axis and the Y-axis, and can adjust its own angle and orientation. The multi-stage lifting structure of the lifting frame can quickly transport the maintenance tools to the designated position and perform high-precision operations. During the maintenance process, the ship maintenance equipment is installed on the side of the hull and remote control operations are performed to ensure the safety of personnel during the maintenance process. The maintenance equipment can be used to carry and transport large materials, and can repair larger cracks or holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is a schematic diagram of the structure of the fixing device for ship maintenance according to the present invention from a first angle; Figure 2 It is a schematic diagram of the structure of the fixing device for ship maintenance of the present invention from a second angle; Figure 3 It is a schematic diagram of the internal structure of the directional traction mechanism of the present invention; Figure 4 It is a structural schematic diagram of the maintenance tool of the present invention; Figure 5 This is a schematic diagram of the installation structure of the ship maintenance fixing equipment of the present invention; In the above figures, 1. track; 2. maintenance slide; 3. directional traction mechanism; 4. lifting frame; 5. tool mounting seat; 6. maintenance tool; 7. camera; 8. ship; 21. shell; 22. limit telescopic part; 23. groove; 24. traction cable; 25. pulley; 26. limit plate; 27. mounting base. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0021] Embodiment 1, as Figure 1 to Figure 5 As shown, the present application provides a ship maintenance equipment, including: a track 1, a maintenance slide 2, a directional traction mechanism 3, a lifting frame 4, a tool mounting seat 5 and a maintenance tool 6; the maintenance slide 2 is installed on the track 1, and the maintenance slide 2 is driven by the directional traction mechanism 3 to slide along the track 1. The maintenance slide 2 includes a sliding table, a rotating table and a rotating seat. The sliding table is installed on the track 1, the rotating table is installed on the upper surface of the sliding table, the rotating seat is installed on the upper surface of the rotating table, and the lifting frame 4 is installed on the rotating seat. The rotating table can rotate along the X-axis, and the rotating seat can rotate along the Y-axis, and the X-axis is perpendicular to the Y-axis; the lifting frame 4 includes a supporting frame and a moving frame, and the moving frame is slidably installed on the supporting frame In the slide slot, the mobile frame is lifted up and down along the slide slot of the support frame by a hydraulic lifting cylinder. A sliding slot is provided on the front side of the lifting frame 4. A tool mounting seat 5 is slidably installed in the sliding slot. A rack-shaped structure is provided on the bottom of the sliding slot. A gear that cooperates with the rack-shaped structure is provided in the tool mounting seat 5. The gear cooperates with the motor installed inside the tool mounting seat 5 to slide up and down along the sliding slot. A maintenance tool 6 and a camera 7 are installed on the upper surface of the tool mounting seat 5. The camera 7 collects images of the maintenance area and transmits them wirelessly to a computer or a wireless remote controller for display. Personnel can use the camera 7 on the deck of the ship 8 to observe the maintenance area and operate the maintenance tool 6 to perform operations. The maintenance tool 6 includes but is not limited to remotely controlled mechanical claws, HIGHYAG laser processing heads, etc. The mechanical claws include but are not limited to PGE series mechanical claws and JQ3-5 series mechanical claws. The HIGHYAG laser processing head can realize remote welding, brazing, cutting, and surface treatment to meet the requirements of advanced manufacturing industries. The type of maintenance tool 6 can be replaced as needed. The maintenance tool 6 is remotely controlled. Personnel operate on the deck of the ship 8 to reduce personal injuries. Figure 4 An implementation of a mechanical claw is provided, but it is not a specific limitation. The mechanical claw can be replaced by other equipment for maintenance.

[0022] One end of the directional traction mechanism 33 is connected to the hoisting drum through a traction cable 24, and the other end of the directional traction mechanism 3 is connected to the maintenance slide 2 through the traction cable 24. The hoisting drum is driven by a motor, and the hoisting drum and the motor are installed on the deck of the ship. The traction cable 24 is wound around the hoisting drum. The traction cable 24 passes through the directional traction mechanism 3 and is connected to the maintenance slide 2, which is used to adjust the position of the maintenance slide 2 on the track 1. There are multiple traction cables 24, and there are multiple directional traction mechanisms 3, which are located at both ends of the track 1 and at the turning point of the track 1. Figure 1 There are two directional traction mechanisms 3 shown, which are located at both ends of the track 1 respectively. The directional traction mechanism 3 is used to adjust the direction of the traction cable 24 so that the traction cable 24 can run along the track of the track 1, and can be locked for protection when the traction cable 24 fails, thereby reducing the impact on the maintenance slide 2.

[0023] The directional traction mechanism 3 includes a shell 21, a mounting base 27, a limit plate 26, a pulley 25, and a limit telescopic member 22. The shell 21 is docked with the mounting base 27. The mounting base 27 is provided with a mounting hole and a fastener. The fastener is passed through the mounting hole and docked with the mounting groove provided on the track 1. The fastener can be a bolt, a flange or other fixing part. The mounting base 27 is used to fix the positioning mechanism to one end of the track 1; the limit plate 26, the pulley 25 and the limit telescopic member 22 are installed in the shell 21 from top to bottom.

[0024] The limit plate 26 includes a limit shaft and a limit motor, one end of the limit shaft is connected to the output shaft of the limit motor, and the other end of the limit shaft is installed with an elliptical cavity. The limit motor is rotated to adjust the angle of the elliptical cavity to limit the pulley shaft in the elliptical cavity. Under normal rotation, the pulley shaft is located inside the elliptical cavity at a set distance from the center, and the set distance is 1-2mm, so it can rotate normally. The angle of the elliptical cavity is adjusted by the limit motor, and the side of the elliptical cavity has a friction layer of rubber material. The side of the elliptical cavity forms friction with the pulley shaft, thereby stopping the pulley shaft from rotating. Due to the setting of the elliptical cavity, the friction force is relatively gentle, and will not cause large wear. Multiple stops can be achieved, effectively extending the service life.

[0025] The pulley 25 is fixed in the housing 21 through the pulley shaft. The pulley 25 can rotate around the pulley shaft. A groove 23 is provided on the side of the pulley 25. The groove 23 is used to install the traction cable 24. A limit ring is provided on the upper side of the groove 23. One end of the limit ring is connected to the limit telescopic rod. The limit telescopic rod can adopt a hydraulic telescopic cylinder. The limit ring is driven to move up and down by the telescopic movement of the output shaft of the hydraulic telescopic rod, which can provide downward pressure on the traction cable 24 in the groove 23, thereby limiting the position of the traction cable 24, so that the traction cable 24 stops moving, which can provide a certain restriction effect. The traction cable 24 can stop moving in time through the hydraulic telescopic cylinder when a fault occurs. As an embodiment, a controller is also installed in the housing 21 of the directional traction mechanism 3. The hydraulic telescopic cylinder and the limit motor are controlled by the controller. The controller is equipped with Bluetooth, which can be connected to a computer or a wireless remote control through Bluetooth to achieve remote operation.

[0026] The maintenance slide 2 includes a sliding table, a rotating table and a rotating seat. The sliding table is a rectangular shell 21 structure. The front and rear end surfaces of the sliding table are provided with traction rings, and the traction rings are connected to one end of the traction cable 24. The left and right sides of the sliding table are provided with slide grooves, and the slide grooves are installed in cooperation with the slide rails. The sliding table is provided with a braking structure, and the braking structure adopts a brake. The brake adopts a hydraulic cylinder to drive and clamp two rectangular brake pads located on both sides of the track 1 to fix the position of the sliding table and the slide rail; two rotating motors are installed inside the rectangular shell 21 structure, and the output shaft of the first rotating motor is connected to the first reduction box, and the first output shaft of the first reduction box is connected to the rotating table to drive the rotating table to rotate along the X-axis. The output shaft of the second rotating motor is connected to the second reduction box, and the second output shaft of the second reduction box is connected to the rotating seat through a helical gear transmission structure to drive the rotating seat to rotate along the Y-axis.

[0027] The lifting frame 4 includes a supporting frame and a moving frame. The moving frame is slidably installed in the slide groove of the supporting frame. The moving frame is lifted and lowered along the slide groove of the supporting frame by a hydraulic lifting cylinder. A sliding groove is provided on the front side of the lifting frame 4. A tool mounting seat 5 is slidably installed in the sliding groove. A rack-shaped structure is provided on the bottom surface of the sliding groove.

[0028] The track 1 includes a plurality of rectangular brackets that can be spliced, and a long steel plate with a groove 23 is arranged on the surface of the rectangular bracket. The rectangular bracket can be assembled in multiple sections, and the installation path of the track 1 can be set according to the location and structure of the repair area. For example, if there is a long crack on the side of the ship 8, the track 1 can be installed along the direction of the crack, and then the repair work can be carried out using the repair tool 6.

[0029] As a feasible installation scheme, the rectangular bracket is gradually installed section by section along the deck of the ship 8 to the area to be repaired. The track 1 located on the side of the ship 8 is installed by hoisting from the side of the deck. The track 1 is fixed to the side of the ship 8 by personnel tied with safety ropes. The fixing method can be welding, nailing or fastening screws. As another scheme, the initial position of the track 1 can be set on the upper surface of the deck, and then the track 1 with a certain arc is gradually fitted to the side of the ship 8 for installation. As another scheme, the track 1 can also be pre-assembled on the deck of the ship 8, cables are tied at both ends of the track 1, and then it is suspended to the side of the ship 8 by cables along one side of the deck for installation.

[0030] When it is necessary to repair a ship, firstly, a track 1 is laid out according to the location and size of the damage to the ship. The track 1 is applied to the surface of the ship 8 and fastened by welding or bolts so that the entire repair equipment can be adjusted as the ship 8 shakes. A directional traction mechanism 3, a repair slide 2 and a lifting frame 4 are installed on the track 1. The track 1 can be used to install it at a more suitable position and then moved to a designated area. The rotating table and rotating seat of the repair slide 2 are set so that the lifting frame 4 installed on its upper surface has two degrees of freedom, namely, the X-axis and the Y-axis, and can adjust its own angle and orientation. The multi-stage lifting structure of the lifting frame 4 can be used to quickly transport the repair tool 6 to the designated position and perform high-precision operations.

[0031] For example, for a long damaged area, multiple repair slides 2 can be used to operate simultaneously, and the steel plate matching the damaged area is clamped and applied to the side of the ship 8, and the steel plate is welded to the damaged area using a welding tool to repair the surface of the ship 8 to prevent the ship 8 from sinking due to a large amount of water taking in. When the repair is completed, the repair slide 2 is moved to the vicinity of the deck or the upper surface of the deck, and the repair slide 2, lifting frame 4, tool mounting seat 5 and repair tool 6 are removed. After the ship docks at the pier, the track 1 fixed on the surface of the ship 8 is removed. During the repair process, the ship repair equipment is installed on the side of the hull and remote control operations are performed to ensure the safety of personnel during the repair process. The repair equipment can be used to transport large materials and repair larger cracks or holes.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A ship maintenance equipment, characterized in that: include: Track (1), directional traction mechanism (3), maintenance slide (2), lifting frame (4), tool mounting seat (5) and maintenance tool (6); A maintenance slide (2) is installed on the track (1), one end of the maintenance slide (2) is connected to a directional traction mechanism (3) via a traction cable (24), the directional traction mechanism (3) is used to drive the maintenance slide (2) to slide along the track (1), a lifting frame (4) is installed on the maintenance slide (2), the maintenance slide (2) is used to adjust the angle of the lifting frame (4), a tool mounting seat (5) is installed on the lifting frame (4), the lifting frame (4) is used to adjust the height of the tool mounting seat (5), a maintenance tool (6) is installed on the tool mounting seat (5), and the maintenance tool (6) is used to perform maintenance operations on the side area to be repaired of the ship (7); The maintenance slide (2) comprises a sliding table, a rotating table and a rotating seat, the sliding table is mounted on the track (1), the rotating table is mounted on the upper surface of the sliding table, the rotating seat is mounted on the upper surface of the rotating table, the lifting frame (4) is mounted on the rotating seat, the rotating table can rotate along the X-axis, the rotating seat can rotate along the Y-axis, and the X-axis is perpendicular to the Y-axis; The lifting frame (4) comprises a supporting frame and a moving frame, the moving frame is slidably mounted in a slide groove of the supporting frame, and the moving frame is lifted up and down along the slide groove of the supporting frame by a hydraulic lifting cylinder, a sliding groove is provided on the front side of the lifting frame (4), a tool mounting seat (5) is slidably mounted in the sliding groove, and a maintenance tool (6) is mounted on the upper surface of the tool mounting seat (5).

2. A fixed device for ship maintenance according to claim 1, characterized in that: The track (1) comprises a plurality of connectable rectangular brackets, the surfaces of which are provided with long strips of steel plates having grooves, and the plurality of rectangular brackets are connected and assembled into a complete track (1). The installation path of the track (1) is set according to the location and structure of the repair area.

3. A fixed device for ship maintenance according to claim 1, characterized in that: One end of the directional traction mechanism (33) is connected to a hoisting drum via a traction cable (24), and the other end of the directional traction mechanism (3) is connected to a maintenance slide (2) via a traction cable (24). The hoisting drum is driven by a motor, and a traction cable is wound around the hoisting drum. The traction cable passes through the directional traction mechanism (3) and is connected to the maintenance slide (2). The traction cable is used to adjust the position of the maintenance slide (2) on the track (1). The directional traction mechanism (3) is used to adjust the direction of the traction cable.

4. A fixed device for ship maintenance according to claim 3, characterized in that: The directional traction mechanism (3) comprises a housing, a mounting base, a limit plate, a pulley, and a limit telescopic member. The housing is butt-jointed with the mounting base. The mounting base is provided with a mounting hole and a fastener. The fastener is passed through the mounting hole and butt-jointed to a mounting groove provided on the track (1). The mounting base is used to fix the positioning mechanism to one end of the track (1). The limit plate, the pulley, and the limit telescopic member are sequentially mounted inside the housing from top to bottom.

5. A fixed device for ship maintenance according to claim 4, characterized in that: The limit plate includes a limit shaft and a limit motor. One end of the limit shaft is connected to the output shaft of the limit motor, and an elliptical cavity is installed on the other end of the limit shaft. The limit motor is rotated to adjust the angle of the elliptical cavity to limit the pulley shaft in the elliptical cavity. Under normal rotation, the pulley shaft is located inside the elliptical cavity at a set distance from the center. The angle of the elliptical cavity is adjusted by the motor, and friction is formed between the side of the elliptical cavity and the pulley shaft, thereby stopping the pulley shaft from rotating.

6. A fixed device for ship maintenance according to claim 5, characterized in that: The pulley is fixed in the shell through the pulley shaft. The pulley rotates around the pulley shaft. A groove is provided on the side of the pulley. The groove is used to install the traction cable. A limit ring is provided on the upper side of the groove. One end of the limit ring is connected to the limit telescopic rod. The limit telescopic rod adopts a hydraulic telescopic cylinder. The limit ring is driven up and down by the telescopic movement of the output shaft of the hydraulic telescopic rod, thereby providing downward pressure on the traction cable in the groove, thereby limiting the position of the traction cable.

7. A fixed device for ship maintenance according to claim 1, characterized in that: The lifting frame (4) comprises a supporting frame and a moving frame, the moving frame is slidably mounted in a slide groove of the supporting frame, the moving frame is lifted up and down along the slide groove of the supporting frame by a hydraulic lifting cylinder, a sliding groove is provided on the front side of the lifting frame (4), a tool mounting seat (5) is slidably mounted in the sliding groove, and a rack-shaped structure is provided on the bottom surface of the sliding groove.

8. A fixed device for ship maintenance according to claim 1, characterized in that: The maintenance slide (2) comprises a slide table, a rotating table and a rotating seat. The slide table is a rectangular shell structure. The front and rear end surfaces of the slide table are provided with traction rings, the traction rings are connected to one end of the traction cable, the left and right sides of the slide table are provided with slide grooves, the slide grooves are installed in coordination with the slide rails, and the slide table is provided with a brake structure, which adopts a brake.

9. A fixed device for ship maintenance according to claim 1, characterized in that: A camera (7) is also mounted on the tool mounting seat (5). The camera (7) collects images of the maintenance area and wirelessly transmits the images to a computer or a wireless remote controller for display. Personnel on the ship deck use the camera (7) to observe the maintenance area and operate the maintenance tool (6) to perform operations.

10. A fixed device for ship maintenance according to claim 1, characterized in that: The bottom surface of the sliding groove is provided with a rack-shaped structure, and the tool mounting seat (5) is provided with a gear that cooperates with the rack-shaped structure. The gear cooperates with a motor installed inside the tool mounting seat (5) to achieve up and down sliding along the sliding groove.

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