A hydraulic sliding watertight door for a ship

Abstract

This utility model provides a hydraulically sliding watertight door for ships, including a door frame, a door body hinged to one end of the door frame, and a sealing ring adhered to the edge of the door body near one end of the door frame. A groove is horizontally formed at the center of the door body near one end of the door frame, and a hydraulic drive component is hinged to the side of the groove away from the hinge axis between the door body and the door frame. Compared with the prior art, this utility model has the following advantages: Through precise matching between the sealing ring and the sealing groove of the door frame, and utilizing the beveled surface of the locking block near the locking groove, lateral pressure is generated during the locking process, tightly pressing the sealing outer edge of the door body against the door frame. Compared with the traditional simple rubber strip sealing structure, it can effectively resist seawater pressure, avoid leakage problems caused by ship vibration and component aging, and greatly improve watertight performance.

Description

Technical Field

[0001] This utility model is a hydraulic sliding watertight door for ships, belonging to the field of watertight doors. Background Technology

[0002] During ship navigation, watertight doors are key equipment for ensuring ship safety. They play a decisive role in preventing water from entering the cabin and maintaining the ship's buoyancy and stability. In the event of a collision, grounding, or other emergencies, the ability of watertight doors to close quickly and maintain good sealing performance is directly related to the safety of the ship and the crew's lives and property.

[0003] Currently, there are many problems with commonly available ship watertight doors that urgently need to be solved. In terms of sealing performance, traditional watertight doors mostly use simple rubber strip sealing structures, and the rubber strips are not properly compressed, so leakage is still likely to occur. In terms of driving methods, some watertight doors rely on a single manual operation, which requires crew members to spend a lot of time and energy to operate in emergencies, making it difficult to achieve rapid closure. On the other hand, some watertight doors that use hydraulic drive lack emergency manual operation functions. Once the hydraulic system fails, the door will not be able to open or close normally. Therefore, it is necessary to design a ship hydraulic sliding watertight door. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a hydraulic sliding watertight door for ships to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a hydraulic sliding watertight door for ships, including a door frame, a door body hinged to one end of the door frame, and a sealing ring glued to the edge of the door body near one end of the door frame. A groove is horizontally formed at the center of the door body near one end of the door frame, and a hydraulic drive component is hinged to the side of the groove away from the hinge axis of the door body and the door frame. A hinge seat is welded to the center of the door frame near the hinge axis of the door body, and the other end of the hydraulic drive component is hinged to the hinge seat. A cavity is formed in the door body above the groove, and a transmission component is provided in the cavity. Openings are provided at the top and bottom of both sides of the cavity, and locking blocks are slidably connected in the openings. Locking grooves are provided on both sides of the door frame corresponding to the locking blocks.

[0006] Furthermore, the door body includes a sealing outer edge and a main body, and the shape of the main body matches the inner contour of the door frame. The sealing outer edge protrudes outward, and the size of the sealing outer edge is smaller than the end face of the door frame. The sealing ring is bonded to one end of the sealing outer edge that is close to the door frame, and the sealing ring has an outward protruding structure in the middle of the end near the door frame. The end of the door frame near the sealing outer edge has a sealing groove whose shape matches the protruding part of the sealing ring.

[0007] Furthermore, a slide rail is provided at the bottom of the door frame near the door body, and the slide rail is designed as a quarter circle arc. The center of the circle where the slide rail is located coincides with the central axis of the hinge axis between the door body and the door frame. A slider is installed inside the slide rail. The top of the slider is connected to the door body through a connecting plate. A roller is fixed to the bottom of the door body away from the hinge axis between the door and the door frame by bolts.

[0008] Furthermore, a drive compartment protrudes outward from the center of the cavity, and an indicator light is fixed at one corner of the drive compartment at both ends of the door. A rotating handle is rotatably installed at both ends of the door near the drive compartment, and the two rotating handles are fixedly connected by a connecting shaft.

[0009] Furthermore, a connecting post is fixed on the side of the locking block away from the locking groove, and a vertical oblique surface is provided on the side of the locking block close to the locking groove. The connecting post is connected to the transmission assembly, and a limiting sleeve with an inner diameter matching its outer diameter is provided at the position of each of the four connecting posts inside the cavity.

[0010] Furthermore, the transmission assembly includes a central component, a worm gear, a connecting rod, a worm, a first tie rod, a rotating component, a second tie rod, a servo motor, a rotating sleeve, a first bevel gear, and a second bevel gear. The central component is located in the center of the cavity, and connecting rods are hinged to both sides of the central component. A worm gear is fixedly connected to the center of the central component near the drive chamber. A worm gear meshing with the worm gear is rotatably connected to the drive chamber below the worm gear via a rotating sleeve. A servo motor is fixed to the rotating sleeve on one side of the worm gear, and the output end of the servo motor is connected to the worm gear. The other side of the worm gear passes through the rotating sleeve and is connected to the first bevel gear. A connecting shaft is mounted on the first bevel gear. The meshing second bevel gear has rotating components rotatably connected to the center positions of the top and bottom ends of the inner wall of the cavity. The rotating components include an integrally formed horizontal bar and a diagonal bar. The diagonal bars of the two rotating components are parallel to each other. The upper diagonal bar is inclined to the lower left, and the lower diagonal bar is inclined to the upper right. The ends of the two connecting rods away from the center component are respectively hinged to the ends of the two diagonal bars. The horizontal bar of the rotating component is hinged to a first pull rod and a second pull rod on both sides, and the positions of the upper and lower first pull rods and second pull rods are opposite. The first pull rod is designed in a "U" shape, and the side of the first pull rod and the second pull rod away from the rotating component are both hinged to the connecting post of the locking block.

[0011] Furthermore, the central component includes a rotating rod and a mounting base. The mounting base is integrally connected to the top of the rotating rod, and the rotating rod and the mounting base are designed at a 60° angle. A laser generator is disposed in the cavity above the mounting base, and a laser receiver that cooperates with the laser generator is embedded in the center of the top of the mounting base. When the locking block is locked, the mounting base is in a vertical state, the laser generator and the laser receiver are aligned, and the rotating rod is tilted upward at 30°. When the locking block is unlocked, the mounting base is in a tilted state, the laser generator and the laser receiver are misaligned, and the rotating rod is tilted downward.

[0012] The beneficial effects of this utility model are:

[0013] 1. By precisely matching the sealing ring with the sealing groove of the door frame, and utilizing the beveled surface of the locking block near the locking groove, lateral pressure is generated during the locking process, which tightly presses the outer sealing edge of the door body against the door frame. Compared with the traditional simple rubber strip sealing structure, it can effectively resist seawater pressure, avoid leakage problems caused by ship vibration and component aging, and greatly improve watertight performance.

[0014] 2. The hydraulic drive components, hinge seats, and grooves work together to achieve rapid and automated sliding opening and closing of the door. The slide rails and sliders at the bottom of the door frame work in conjunction with the rollers at the bottom of the door to reduce friction and ensure smooth operation during the opening and closing process. At the same time, a manual drive structure is set up with components such as a rotating handle, connecting shaft, first bevel gear, and second bevel gear. When the hydraulic system fails, the crew can manually operate the door to open and close it. The dual drive method ensures the reliable operation of the watertight door in emergency situations and overcomes the limitations of the single drive of traditional watertight doors.

[0015] 3. Utilizing the rotating rod and mounting base in the central component, along with the laser generator and laser receiver, when the locking block is fully locked, the mounting base is vertical, the laser receiver receives the laser, and the indicator light illuminates; when unlocked, the state changes, and the indicator light goes out. This intuitive status feedback mechanism solves the problem of traditional watertight doors being unable to accurately and promptly determine the door's locking status, allowing crew members to monitor the equipment's operation in real time. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the closing structure of a hydraulic sliding watertight door for ships according to the present invention;

[0018] Figure 2 This is a schematic diagram of the opening structure of a hydraulic sliding watertight door for ships according to the present invention;

[0019] Figure 3This is a schematic diagram of the door structure of a hydraulic sliding watertight door for ships according to the present invention;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of a hydraulic sliding watertight door for ships according to the present invention.

[0021] Figure 5 This is a schematic diagram of the door frame structure of a hydraulic sliding watertight door for ships according to this utility model;

[0022] Figure 6 This is a schematic diagram of the transmission component of a ship hydraulic sliding watertight door in the locked state according to this utility model;

[0023] Figure 7 This is a schematic diagram of the transmission component of a ship hydraulic sliding watertight door in the unlocked state according to this utility model;

[0024] Figure 8 This is a schematic diagram of the central component structure of a hydraulic sliding watertight door for ships according to this utility model;

[0025] Figure 9 This is a schematic diagram of the worm gear transmission of a hydraulic sliding watertight door for ships according to this utility model;

[0026] In the diagram: 1. Door frame; 101. Locking groove; 102. Sealing groove; 2. Door body; 201. Sealing outer edge; 202. Main body; 203. Groove; 204. Opening; 205. Cavity; 206. Drive compartment; 3. Slide rail; 4. Hinge seat; 5. Rotating handle; 501. Connecting shaft; 6. Hydraulic drive component; 7. Indicator light; 8. Sealing ring; 9. Locking block; 901. Connecting column; 902. Beveled surface; 10. Roller; 11. 1101. Slider; 12. Connecting plate; 13. Center component; 14. Rotating rod; 15. Mounting base; 16. Worm gear; 17. Connecting rod; 18. Laser generator; 19. Limiting sleeve; 10. Worm; 11. First pull rod; 12. Rotating component; 19. Crossbar; 19. Diagonal bar; 20. Second pull rod; 21. Servo motor; 22. Laser receiver; 23. Rotating sleeve; 24. First bevel gear; 25. Second bevel gear. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] Please see Figures 1 to 9This utility model provides a technical solution: a hydraulic sliding watertight door for ships, including a door frame 1, a door body 2 hinged to one end of the door frame 1, and a sealing ring 8 glued to the edge of the door body 2 near the end of the door frame 1. A groove 203 is horizontally formed at the center of the door body 2 near the end of the door frame 1, and a hydraulic drive component 6 is hinged to the side of the groove 203 away from the hinge axis of the door body 2 and the door frame 1. A hinge seat 4 is welded to the center of the door frame 1 near the hinge axis of the door body 2, and the other end of the hydraulic drive component 6 is hinged to the hinge seat 4. A cavity 205 is formed in the door body 2 above the groove 203, and a transmission component is provided in the cavity 205. Openings 2 are provided at the top and bottom of both sides of the cavity 205. 04, and a locking block 9 is slidably connected inside the opening 204. Locking grooves 101 that are adapted to the locking block 9 are opened on both sides of the door frame 1. Through the hinged cooperation of the groove 203, the hydraulic drive component 6 and the hinge seat 4, a stable hydraulic drive structure is formed. The hydraulic drive component 6 uses the hinge seat 4 as the fulcrum to push the door body 2 to rotate around the hinge axis. Compared with the manual drive method, it can realize the opening and closing of the door body 2 quickly and effortlessly. After the door body 2 is closed, the transmission component drives the locking block 9 to slide into the locking groove 101 along the opening 204 to achieve a firm lock. Compared with the traditional simple locking structure, this design can not only withstand greater seawater pressure, but also prevent the door body 2 from being opened accidentally, further improving the safety and reliability of the watertight door.

[0029] For example, the door body 2 includes a sealing outer edge 201 and a main body 202. The shape of the main body 202 matches the inner contour of the door frame 1. The sealing outer edge 201 protrudes outward, and the size of the sealing outer edge 201 is smaller than the end face of the door frame 1. The sealing ring 8 is bonded to one end of the sealing outer edge 201 and is close to the door frame 1. The sealing ring 8 has an outward protrusion structure in the middle of the end near the door frame 1. The end of the door frame 1 near the sealing outer edge 201 has a sealing groove 102 whose shape matches the protrusion of the sealing ring 8. The sealing ring 8 has an outward protrusion structure in the middle of the end near the door frame 1. Correspondingly, the end of the door frame 1 near the sealing outer edge 201 has a sealing groove 102 that perfectly matches the shape of the protrusion of the sealing ring 8. When the door body 2 is closed and locked, the outward protrusion structure of the sealing ring 8 will be embedded in the sealing groove 102. The tight cooperation between the two forms a multi-layer sealing barrier, which effectively prevents seawater from seeping in and greatly improves the sealing performance and waterproof effect of the watertight door.

[0030] For example, a slide rail 3 is provided at the bottom of the door frame 1 near the door body 2. The slide rail 3 is a quarter-circle arc design. The center of the circle containing the slide rail 3 coincides with the central axis of the hinge axis between the door body 2 and the door frame 1. A slider 11 is installed inside the slide rail 3. The top of the slider 11 is connected to the door body 2 through a connecting plate 1101. A roller 10 is fixed to the bottom of the door body 2 away from the hinge axis with the door frame 1 by bolts. During the opening and closing of the door body 2, the slider 11 slides along the arc trajectory of the slide rail 3, providing horizontal guidance and support for the door body 2. The roller 10 is in contact with the ground and bears the vertical weight of the door body 2. The two work together to effectively reduce the frictional resistance of the door body 2 during operation, so that the door body 2 can rotate smoothly and steadily along the predetermined arc path. This not only improves the ease of operation of opening and closing the door body 2, but also enhances the stability and reliability of the overall structure.

[0031] Please see Figure 3 and Figure 4 The central position of the cavity 205 protrudes outward to form a drive chamber 206, and an indicator light 7 is fixed at one corner of the drive chamber 206 at both ends of the door 2. A rotating handle 5 is rotatably installed at both ends of the door 2 near the drive chamber 206, and the two rotating handles 5 are fixedly connected by a connecting shaft 501. The protruding structure of the drive chamber 206 provides ample space for the internal transmission components, ensuring their stable operation. The indicator light 7 is placed in a conspicuous position, making it easy for the operator to obtain the status information of the door 2 in a timely manner. The combination of the rotating handle 5 and the connecting shaft 501 realizes synchronous operation at both ends. When the hydraulic drive system fails, the operator can rotate the rotating handle 5, which drives the internal transmission components through the connecting shaft 501 to complete the opening, closing or locking operation of the door 2.

[0032] Please see Figure 6 and Figure 7 A connecting post 901 is fixed on the side of the locking block 9 away from the locking groove 101, and a vertical bevel 902 is provided on the side of the locking block 9 near the locking groove 101. The connecting post 901 is connected to the transmission assembly, and a limiting sleeve 16 with an inner diameter matching its outer diameter is provided at the position of the four connecting posts 901 inside the cavity 205. When the transmission assembly drives the locking block 9 to move towards the locking groove 101, the bevel 902 contacts the edge of the locking groove 101 and generates a normal component force, forcing the door body 2 to fit tightly against the door frame 1, realizing the interference fit between the sealing ring 8 and the sealing groove 102.

[0033] Please see Figures 6-9The transmission assembly includes a central component 12, a worm gear 13, a connecting rod 14, a worm 17, a first pull rod 18, a rotating component 19, a second pull rod 20, a servo motor 21, a rotating sleeve 23, a first bevel gear 24, and a second bevel gear 25. The central component 12 is located in the center of the cavity 205, and connecting rods 14 are hinged to both sides of the central component 12. A worm gear 13 is fixedly connected to the center of the central component 12 near the drive chamber 206, and a servo motor 13 is rotatably connected to the drive chamber 206 below the worm gear 13 via the rotating sleeve 23. A worm 17 meshes with a worm gear 13. A servo motor 21 is fixed on a rotating sleeve 23 on one side of the worm 17, and the output end of the servo motor 21 is connected to the worm 17. The other side of the worm 17 passes through the rotating sleeve 23 and is connected to a first bevel gear 24. A second bevel gear 25 meshing with the first bevel gear 24 is installed on the connecting shaft 501. Rotating components 19 are rotatably connected at the center of the top and bottom ends of the inner wall of the cavity 205. The rotating components 19 include an integrally formed crossbar 1901 and a diagonal bar 1902. The diagonal rods 1902 of component 19 are parallel to each other. The upper diagonal rod 1902 tilts downward to the left, and the lower diagonal rod 1902 tilts upward to the right. The ends of the two connecting rods 14 away from the center component 12 are respectively hinged to the ends of the two diagonal rods 1902. The horizontal rod 1901 of the rotating component 19 is hinged to the first pull rod 18 and the second pull rod 20 on both sides, and the positions of the upper and lower first pull rods 18 and the second pull rod 20 are opposite. The first pull rod 18 is designed in a "U" shape, and the first pull rod 18 and the second pull rod 20 are away from the rotating component 19. The four locking blocks 9 are hinged to the connecting post 901 of the locking block 9 on both sides. The transmission component achieves speed reduction and torque increase through worm gear 13 and worm 17, and realizes power reversal through bevel gear pair. Combined with the transmission of connecting rod 14, first pull rod 18, rotating part 19 and second pull rod 20, the linear motion of the center part 12 is converted into the synchronous extension and retraction of the four locking blocks 9. The dual power input design allows the system to be automatically controlled by servo motor 21, and can also be manually operated by rotating handle 5 in emergency situations, which significantly improves the reliability and applicability of the watertight door.

[0034] Please see Figure 6 and Figure 8The central component 12 includes a rotating rod 1201 and a mounting base 1202. The top of the rotating rod 1201 is integrally connected to the mounting base 1202, and the rotating rod 1201 and the mounting base 1202 are designed at a 60° angle. A laser generator 15 is disposed in the cavity 205 above the mounting base 1202, and a laser receiver 22 that cooperates with the laser generator 15 is embedded in the center of the top of the mounting base 1202. When the locking block 9 is locked, the mounting base 1202 is in a vertical position, and the laser generator 15 and the laser receiver 22 correspond to each other. The rotating rod 1201 is tilted upward at a 30° angle. When the locking block 9 is unlocked, the mounting base 1202 is in a vertical position. When the door 2 is in an inclined state, the laser generator 15 and the laser receiver 22 are misaligned, and the rotating rod 1201 tilts downward. When the locking block 9 is in the locked state, the central component 12 rotates under the drive of the transmission assembly until the mounting base 1202 is in a vertical state. At this time, the optical paths of the laser generator 15 and the laser receiver 22 are aligned, the laser signal is received, and the indicator light 7 is lit, indicating that the door 2 has been reliably locked. When the locking block 9 is unlocked, the central component 12 rotates in the opposite direction, the mounting base 1202 tilts accordingly, the rotating rod 1201 tilts downward, the optical paths of the laser generator 15 and the laser receiver 22 are misaligned, the indicator light 7 is off, indicating that the door 2 is in an unlocked state.

[0035] Detailed implementation: When the door opens, the hydraulic drive unit 6, with the hinge seat 4 as the fulcrum and supported within the groove 203, generates a thrust to push the door body 2 to rotate around the hinge axis of the door frame 1. During this process, the slider 11 within the slide rail 3 assists the door body 2 in moving via the connecting plate 1101, and the roller 10 at the bottom of the door body 2 contacts the ground. When the door closes, the hydraulic drive unit 6 operates in the reverse direction, pulling the door body 2 to close along the original trajectory. After the door body 2 is completely closed, the sealing ring 8 of the sealing outer edge 201 initially contacts the door frame 1. At this time, the servo motor 21 starts, driving the worm gear 17 to rotate. The worm gear 17 meshes with the worm wheel 13, driving the central member 12 to move. The connecting rods 14 hinged on both sides of the central member 12 push the rotating member 19 to rotate. The crossbar 1901 of the rotating member 19 drives the first pull rod 18 and the second pull rod 20, causing the locking block 9 to slide along the opening 204 into the locking groove 101 of the door frame 1. During insertion, the beveled surface 902 of the locking block 9 near the locking groove 101 contacts the edge of the locking groove 101, generating lateral pressure, forcing the door body 2 to fit tightly against the door frame 1, further squeezing the sealing ring 8, so that its outward convex structure is completely embedded in the sealing groove of the door frame 1. Within 102, multiple sealing barriers are formed. During the locking process, the rotating rod 1201 of the central component 12 rotates with the mounting base 1202. When the locking block 9 is fully locked, the mounting base 1202 rotates to a vertical position. At this time, the laser receiver 22 at the top center of the mounting base 1202 aligns with the optical path of the laser generator 15 in the cavity 205, and the laser signal is received. The indicator lights 7 at both ends of the door 2 near the corners of the drive compartment 206 light up, indicating to the operator that the watertight door has been reliably locked. When it is necessary to unlock the watertight door, the servo motor 21 rotates in the opposite direction, driving the transmission... The components cause the locking block 9 to retract, the center piece 12 to rotate in the opposite direction, the mounting base 1202 to tilt, the laser generator 15 and the laser receiver 22 to have their optical paths misaligned, and the indicator light 7 to turn off. If the hydraulic drive system malfunctions, the operator can rotate the rotating handles 5 at both ends of the door body 2, which will drive the second bevel gear 25 to rotate through the connecting shaft 501. The second bevel gear 25 meshes with the first bevel gear 24, thereby driving the worm gear 17 to rotate. The subsequent transmission process is the same as that of the electric drive, realizing the manual operation of the opening, closing and locking of the door body 2, ensuring that the watertight door can still be used normally in an emergency.

[0036] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulically sliding watertight door for ships, comprising a door frame, characterized in that: One end of the door frame is hinged to a door body, and a sealing ring is glued to the edge of the door body near one end of the door frame. A groove is horizontally formed in the center of the door body near one end of the door frame, and a hydraulic drive component is hinged to the side of the groove away from the hinge axis of the door body and the door frame. A hinge seat is welded to the center of the door frame near the hinge axis of the door body, and the other end of the hydraulic drive component is hinged to the hinge seat. A cavity is formed in the door body above the groove, and a transmission component is installed in the cavity. Openings are provided at the top and bottom of both sides of the cavity, and locking blocks are slidably connected in the openings. Locking grooves are provided on both sides of the door frame corresponding to the positions of the locking blocks.

2. The hydraulic sliding watertight door for ships according to claim 1, characterized in that: A slide rail is provided at the bottom of the door frame near the door body. The slide rail is designed as a quarter circle. The center of the circle containing the slide rail coincides with the central axis of the hinge axis between the door body and the door frame. A slider is installed inside the slide rail. The top of the slider is connected to the door body through a connecting plate. A roller is fixed to the bottom of the door body away from the hinge axis between the slider and the door frame by bolts.

3. A hydraulically sliding watertight door for ships according to claim 1, characterized in that: The door body includes a sealing outer edge and a main body, and the shape of the main body matches the inner contour of the door frame. The sealing outer edge protrudes outward, and the size of the sealing outer edge is smaller than the end face of the door frame. The sealing ring is bonded to one end of the sealing outer edge that is close to the door frame, and the sealing ring has an outward protruding structure in the middle of the end near the door frame. The end of the door frame near the sealing outer edge has a sealing groove whose shape matches the protruding part of the sealing ring.

4. A hydraulic sliding watertight door for ships according to claim 1, characterized in that: The cavity protrudes outward at its center to form a drive compartment, and indicator lights are fixed at one corner of each end of the door near the drive compartment. Rotary handles are rotatably installed at each end of the door near the drive compartment, and the two rotary handles are fixedly connected by a connecting shaft.

5. A hydraulic sliding watertight door for ships according to claim 1, characterized in that: A connecting post is fixed on the side of the locking block away from the locking groove, and a vertical bevel is provided on the side of the locking block close to the locking groove. The connecting post is connected to the transmission assembly, and a limiting sleeve with an inner diameter matching its outer diameter is provided at the position of each of the four connecting posts inside the cavity.

6. A hydraulically sliding watertight door for ships according to claim 1, characterized in that: The transmission assembly includes a central component, a worm gear, a connecting rod, a worm, a first tie rod, a rotating component, a second tie rod, a servo motor, a rotating sleeve, a first bevel gear, and a second bevel gear. The central component is located in the center of the cavity, and connecting rods are hinged to both sides of the central component. A worm gear is fixedly connected to the center of the central component near the drive chamber. A worm gear meshing with the worm gear is rotatably connected to the drive chamber below the worm gear via a rotating sleeve. A servo motor is fixed to the rotating sleeve on one side of the worm gear, and the output end of the servo motor is connected to the worm gear. The other side of the worm gear passes through the rotating sleeve and is connected to the first bevel gear, and a gear meshing with the first bevel gear is mounted on the connecting shaft. The second bevel gear is rotatably connected to a rotating component at the center of the top and bottom of the inner wall of the cavity. The rotating component includes an integrally formed horizontal bar and a diagonal bar. The diagonal bars of the two rotating components are parallel to each other. The upper diagonal bar is inclined to the lower left, and the lower diagonal bar is inclined to the upper right. The ends of the two connecting rods away from the center component are respectively hinged to the ends of the two diagonal bars. The horizontal bar of the rotating component is hinged to a first pull rod and a second pull rod on both sides. The positions of the upper and lower first pull rods and the second pull rod are opposite. The first pull rod is designed in a "U" shape. The side of the first pull rod and the second pull rod away from the rotating component are both hinged to the connecting post of the locking block.

7. A hydraulically sliding watertight door for ships according to claim 6, characterized in that: The central component includes a rotating rod and a mounting base. The mounting base is integrally connected to the top of the rotating rod, and the rotating rod and the mounting base are designed at a 60° angle. A laser generator is installed in the cavity above the mounting base, and a laser receiver that cooperates with the laser generator is embedded in the center of the top of the mounting base. When the locking block is locked, the mounting base is in a vertical state, the laser generator and the laser receiver are aligned, and the rotating rod is tilted upward at 30°. When the locking block is unlocked, the mounting base is in a tilted state, the laser generator and the laser receiver are misaligned, and the rotating rod is tilted downward.

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