A ship repair access door

Abstract

This invention belongs to the field of ship maintenance technology and discloses a ship maintenance access door, including a door frame; an access door body hinged to one side of the door frame; a door lock mechanism located in the middle of the access door body, with a locking component at one end; and a trigger component located at the top of the access door body. The above technical solution, by setting a movable ring and a drive waterwheel, uses lubricating oil flowing in the conveying trough to drive the drive waterwheel to rotate. This causes the first bevel gear to rotate synchronously, driving the second bevel gear to rotate, which in turn drives the linkage block to rotate, pulling the fixed block and the movable ring to move back and forth within the heating chamber. When the heating chamber is full of lubricating oil, the back and forth movement of the heating chamber squeezes and pushes the lubricating oil, causing friction and generating high temperatures. This allows the locking block to be released from its solidified state quickly and conveniently, greatly reducing the labor intensity of the operators.

Description

Technical Field

[0001] This invention belongs to the field of ship maintenance technology, specifically a ship maintenance access door. Background Technology

[0002] Ship maintenance access doors play a vital role in ship safety and maintenance. They are not only passageways for crew members to carry out routine maintenance and repairs, but also important escape routes for crew members and passengers in emergencies. Furthermore, they have strong protective properties and high structural strength to withstand possible impacts and pressures.

[0003] The existing ship maintenance access door has a rotating wheel on the front exposed to the outside. In cold weather, the wheel can solidify, causing it to jam and become difficult to rotate. While heating tools can effectively remove the solidification, this increases the workload for operators. Therefore, improvements are needed. Summary of the Invention

[0004] To address the problems mentioned in the background section, the present invention provides a ship maintenance access door, which has the advantage of facilitating the release of the door lock from its solidified and locked state.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a ship maintenance access door, comprising a door frame; a maintenance access door body hinged to one side of the door frame; a door lock mechanism disposed in the middle of the maintenance access door body, with a locking component at one end; a trigger component disposed at the top of the maintenance access door body, located between the locking component and the maintenance access door body; a conveying component disposed inside the maintenance access door body and on one side of the trigger component; and a heating component comprising a heating cavity, the heating cavity being opened in the inner cavity of the maintenance access door body and located outside the locking component, a movable ring being movably installed on the left side of the inner cavity of the heating cavity, a fixing block being disposed at the top of the movable ring, and a drive component disposed inside the maintenance access door body, located between the conveying component and the heating cavity.

[0006] Preferably, the door lock mechanism includes a drive handwheel, a fixed plate, a locking stop bar, a first power spring, and a drive push plate;

[0007] The drive handwheel is movably sleeved in the middle of the maintenance access door body, the fixed plate is fixedly installed in the middle of the other side of the maintenance access door body, the locking stop is movably installed on the back of the maintenance access door body, and its inner end is slidably sleeved with the fixed plate, the locking stop is elastically connected to the fixed plate through the first power spring, and the drive push plate is fixedly sleeved on the surface of the drive handwheel and the inner side of the fixed plate.

[0008] Preferably, the locking assembly includes a rotating rod, a locking block, a rotating shaft, and a locking slot;

[0009] The rotating rod is threaded into one end of the drive handwheel, the locking block is movably installed in the inner cavity of the drive handwheel, the rotating shaft is fixedly installed at one end of the rotating rod and located inside the locking block, and the locking slot is opened inside the drive handwheel and located on one side of the locking block.

[0010] Preferably, the triggering component includes an oil reservoir, a rubber air bag, a movable piston block, and a second power spring;

[0011] The oil reservoir is located on the top of the maintenance access door body and inside the rotating rod and the maintenance access door body. The rubber air bag is located at the bottom of the inner cavity of the oil reservoir. The movable piston block is located on the top of the rubber air bag. The top of the movable piston block is elastically connected to the inner wall of the oil reservoir through a second power spring. An oil guide valve is fixedly connected to the middle of the top of the oil reservoir.

[0012] Preferably, the conveying assembly includes a connecting pipe, a conveying trough, a one-way valve stem, and a first connecting spring;

[0013] The connecting pipe is fixedly connected between the oil storage tank and the maintenance passage door body, and is located at the bottom of the moving piston block. The connecting pipe is connected to the heating chamber through the conveying groove. The one-way valve column is movably installed on one side of the inner cavity of the conveying groove. The one-way valve column is elastically connected to the inner wall of the conveying groove through the first connecting spring.

[0014] Preferably, the drive assembly includes a drive turbine, a first bevel gear, a second bevel gear, and a linkage block;

[0015] The drive turbine is movably sleeved inside the maintenance access door body, with one end extending into the conveying trough. The first bevel gear is fixedly sleeved on the other end surface of the drive turbine. The second bevel gear is movably sleeved on the inner wall of the maintenance access door body and located on one side of the first bevel gear. The linkage block is fixedly sleeved on one end of the second bevel gear, with the protruding part of one end of the linkage block extending into the inner wall of the fixed block. The surfaces of the first bevel gear and the second bevel gear mesh with each other.

[0016] Preferably, the maintenance access door body has a lubrication cavity formed inside between the movable ring and the drive handwheel, and the maintenance access door body has a sealing component located at the top center of the lubrication cavity.

[0017] Preferably, the sealing assembly includes a baffle plate, a first pneumatic cylinder, and a first piston rod;

[0018] The baffle is movably installed inside the maintenance access door body and is located on both sides of the top center of the lubrication chamber. The first pneumatic cylinder is fixedly installed inside the maintenance access door body and is located outside the baffle. The first piston rod is movably installed in the inner cavity of the first pneumatic cylinder and its inner end is fixedly connected to the baffle.

[0019] Preferably, the maintenance access door body has a pneumatic assembly located outside the lubrication chamber inside, and the pneumatic assembly includes a second pneumatic cylinder, a second piston rod, and a second connecting spring;

[0020] The second pneumatic cylinder is fixedly installed inside the maintenance access door body and located in the middle of the outer side of the lubrication chamber. The second piston rod is movably installed on the inner wall of the second pneumatic cylinder, and the outer side of the second piston rod is elastically connected to the inner wall of the second pneumatic cylinder through a second connecting spring.

[0021] Preferably, the second pneumatic cylinder is connected to the first pneumatic cylinder through a ventilation channel.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] The above technical solution, by setting up a movable ring and a drive water wheel, uses the flow of lubricating oil in the conveying trough to drive the drive water wheel to rotate. This causes the first bevel gear to rotate synchronously, driving the second bevel gear to rotate as well. This, in turn, causes the linkage block to rotate, pulling the fixed block and the movable ring to move back and forth in the heating chamber. When the heating chamber is full of lubricating oil, the back and forth movement of the heating chamber can squeeze and push the lubricating oil, causing friction to generate high temperatures. This allows the locking block to be released from its solidified state quickly and easily, greatly reducing the labor intensity of the operators.

[0024] This invention incorporates a rubber air bag and a second power spring. When the gas inside the rubber air bag senses cold air, it contracts. The elastic force of the second power spring then assists in pushing the moving piston block downwards. This causes the lubricating oil in the top cavity of the oil reservoir to move to one side through the connecting pipe, allowing the lubricating oil to smoothly enter the conveying trough. This, in turn, smoothly drives the entire drive water turbine to rotate, thus achieving the effect of driving the water turbine to run.

[0025] This invention, by setting up a baffle plate and a second piston rod, allows some lubricating oil to enter the lubrication chamber when the movable ring pushes the lubricating oil inside the heating chamber to shake. When the lubricating chamber is full of lubricating oil, it will squeeze and push the second piston rod to move in opposite directions, so as to push the gas outside the inner cavity of the second pneumatic cylinder into the inner cavity of the first pneumatic cylinder through the ventilation channel. This pushes the two baffle plates to move in opposite directions, blocking the opening at the top of the lubrication chamber, which facilitates the subsequent smooth squeezing and pushing of the lubricating oil in the heating chamber to generate heat. Ultimately, the lubricating oil inside the lubrication chamber can smoothly improve the overall rotation smoothness of the drive handwheel. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure on the back of the present invention;

[0028] Figure 3 This is a partial structural schematic diagram of the cross-section of the door lock mechanism of the present invention;

[0029] Figure 4 This is a partial structural schematic diagram of the cross-section of the trigger component of the present invention;

[0030] Figure 5 for Figure 4 A magnified schematic diagram of the partial structure at point A in the middle;

[0031] Figure 6 for Figure 4 A magnified schematic diagram of the local structure at point B;

[0032] Figure 7 This is a cross-sectional view of the locking groove of the present invention;

[0033] Figure 8 This is a partial structural schematic diagram of the cross-section of the drive component of the present invention;

[0034] Figure 9 This is a cross-sectional view of the pneumatic component of the present invention;

[0035] Figure 10 This is a schematic diagram of the sealing component of the present invention.

[0036] In the diagram: 1. Door frame; 2. Inspection passage door body; 3. Door lock mechanism; 301. Drive handwheel; 302. Fixed plate; 303. Locking stop bar; 304. First power spring; 305. Drive push plate; 4. Locking assembly; 401. Rotating rod; 402. Locking block; 403. Rotating shaft; 404. Locking slot; 5. Trigger assembly; 501. Oil reservoir; 502. Rubber air bag; 503. Moving piston block; 504. Second power spring; 6. Oil guide valve; 7. Conveying assembly; 701. Connecting pipe; 702. Conveying trough; 703. 704. One-way valve column; 8. First connecting spring; 9. Heating assembly; 10. Heating chamber; 11. Moving ring; 12. Fixing block; 13. Drive assembly; 14. Drive water wheel; 15. First bevel gear; 16. Second bevel gear; 17. Linkage block; 18. Lubrication chamber; 19. Sealing assembly; 10. Baffle plate; 11. First pneumatic cylinder; 12. First piston rod; 13. Pneumatic assembly; 14. Second pneumatic cylinder; 15. Second piston rod; 16. Second connecting spring; 17. Vent channel. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 10 As shown, the present invention provides a ship maintenance access door, including a door frame 1; a maintenance access door body 2, hinged to one side of the door frame 1; a door lock mechanism 3, disposed in the middle of the maintenance access door body 2, and having a locking component 4 at one end; a trigger component 5, disposed at the top of the maintenance access door body 2, and located between the locking component 4 and the maintenance access door body 2; a conveying component 7, disposed inside the maintenance access door body 2 and on one side of the trigger component 5; and a heating component 8, including a heating cavity 801, which is opened in the inner cavity of the maintenance access door body 2 and located outside the locking component 4. A movable ring 802 is movably installed on the left side of the inner cavity of the heating cavity 801, and a fixing block 803 is disposed on the top of the movable ring 802. A drive component 9 is disposed inside the maintenance access door body 2, located between the conveying component 7 and the heating cavity 801.

[0039] When the trigger component 5 triggers the internal lubricating oil to enter the heating chamber 801 through the conveying component 7, the driving component 9 will drive the moving ring 802 and the fixed block 803 to move back and forth. At this time, the lubricating oil inside the heating chamber 801 will be squeezed and pushed to generate heat, which will heat up the position of the locking component 4 and release the solidification.

[0040] like Figure 3 As shown, the door lock mechanism 3 includes a drive handwheel 301, a fixed plate 302, a locking stop bar 303, a first power spring 304, and a drive push plate 305;

[0041] The drive handwheel 301 is movably sleeved in the middle of the maintenance access door body 2. The fixed plate 302 is fixedly installed in the middle of the other side of the maintenance access door body 2. The locking stop bar 303 is movably installed on the back of the maintenance access door body 2, and its inner end is slidably sleeved with the fixed plate 302. The locking stop bar 303 is elastically connected to the fixed plate 302 through the first power spring 304. The drive push plate 305 is fixedly sleeved on the surface of the drive handwheel 301 and the inner side of the fixed plate 302.

[0042] The above solution is adopted: by setting up a drive pusher 305, by Figure 3 It can be seen that multiple inclined grooves are opened on the outer side of the drive push plate 305. When the inclined groove and the inner end of the locking stop bar 303 are misaligned, they will be squeezed to move outward, which can block and lock the maintenance passage door body 2.

[0043] like Figure 4 As shown, the locking assembly 4 includes a rotating rod 401, a locking block 402, a rotating shaft 403, and a locking slot 404;

[0044] The rotating rod 401 is threaded into one end of the drive handwheel 301. The locking block 402 is movably installed in the inner cavity of the drive handwheel 301. The rotating shaft 403 is fixedly installed at one end of the rotating rod 401 and is located inside the locking block 402. The locking groove 404 is opened inside the drive handwheel 301 and is located on one side of the locking block 402.

[0045] The above solution is adopted: by setting a locking block 402, when the operator rotates the rotating rod 401 to move to one side, the rotating shaft 403 can rotate and push the locking block 402 to move synchronously until the locking block 402 moves into the locking slot 404. At this time, the operator can smoothly rotate the drive handwheel 301, so that the outer inclined groove of the fixed plate 302 and the locking stop bar 303 are aligned, and the first power spring 304 releases its elasticity and pushes the locking stop bar 303 to move inward and retract, thus successfully releasing the blocking and locking effect on the maintenance passage door body 2.

[0046] like Figure 4 As shown, the triggering component 5 includes an oil reservoir 501, a rubber air bag 502, a movable piston block 503, and a second power spring 504.

[0047] The oil reservoir 501 is located at the top of the maintenance access door body 2 and inside the rotating rod 401 and the maintenance access door body 2. The rubber air bag 502 is located at the bottom of the inner cavity of the oil reservoir 501. The movable piston block 503 is located at the top of the rubber air bag 502. The top of the movable piston block 503 is elastically connected to the inner wall of the oil reservoir 501 through the second power spring 504. The middle of the top of the oil reservoir 501 is fixedly connected to the oil guide valve 6.

[0048] The above solution is adopted: by setting a rubber air bag 502, when the rubber air bag 502 is compressed by cold air, the elastic force of the second power spring 504 can be released smoothly, thereby assisting in pushing the entire moving piston block 503 to move downward.

[0049] like Figure 6 As shown, the conveying assembly 7 includes a connecting pipe 701, a conveying groove 702, a one-way valve 703, and a first connecting spring 704;

[0050] The connecting pipe 701 is fixedly connected between the oil storage tank 501 and the maintenance passage door body 2, and is located at the bottom of the moving piston block 503. The connecting pipe 701 is connected to the heating chamber 801 through the conveying groove 702. The one-way valve column 703 is movably installed on one side of the inner cavity of the conveying groove 702. The one-way valve column 703 is elastically connected to the inner wall of the conveying groove 702 through the first connecting spring 704.

[0051] The above solution is adopted: by setting a one-way valve 703, when the lubricating oil at the top of the inner cavity of the oil reservoir 501 enters the other side of the one-way valve 703 through the connecting pipe 701, it will squeeze and push the one-way valve 703 to one side, thereby opening the one-way valve 703. Then the lubricating oil will flow into the inner cavity of the heating chamber 801 in one direction through the conveying groove 702.

[0052] like Figure 5 and Figure 8 As shown, the drive assembly 9 includes a drive water turbine 901, a first bevel gear 902, a second bevel gear 903, and a linkage block 904;

[0053] The drive turbine 901 is movably sleeved inside the maintenance access door body 2, and one end extends into the conveying trough 702. The first bevel gear 902 is fixedly sleeved on the other end surface of the drive turbine 901. The second bevel gear 903 is movably sleeved on the inner wall of the maintenance access door body 2 and is located on one side of the first bevel gear 902. The linkage block 904 is fixedly sleeved on one end of the second bevel gear 903. The protruding part of one end of the linkage block 904 extends into the inner wall of the fixed block 803. The surfaces of the first bevel gear 902 and the second bevel gear 903 mesh with each other.

[0054] The above scheme is adopted: by setting up a linkage block 904, when the drive water wheel 901 rotates, the first bevel gear 902 will drive the second bevel gear 903 to rotate, thereby making the linkage block 904 rotate synchronously as a whole, so that the protruding part pulls the fixed block 803 and the movable ring 802 to move back and forth left and right.

[0055] like Figure 9 and Figure 10 As shown, the maintenance access door body 2 has a lubrication cavity 10 located between the movable ring 802 and the drive handwheel 301, and the maintenance access door body 2 has a sealing component 11 located at the top center of the lubrication cavity 10.

[0056] The above solution is adopted: through the design of the lubrication chamber 10, the lubricating oil flowing in the heating chamber 801 can flow into the lubrication chamber 10 for storage, which can lubricate the contact part between the drive handwheel 301 and the maintenance passage door body 2, reduce friction, and improve the smoothness of rotation.

[0057] like Figure 9 and Figure 10 As shown, the sealing assembly 11 includes a baffle plate 1101, a first pneumatic cylinder 1102, and a first piston rod 1103;

[0058] The baffle plate 1101 is movably installed inside the maintenance access door body 2 and is located on both sides of the top center of the lubrication chamber 10. The first pneumatic cylinder 1102 is fixedly installed inside the maintenance access door body 2 and is located outside the baffle plate 1101. The first piston rod 1103 is movably installed in the inner cavity of the first pneumatic cylinder 1102 and its inner end is fixedly connected to the baffle plate 1101.

[0059] The above solution is adopted: by setting up a baffle plate 1101, when the air pressure on the outer side of the inner cavity of the first pneumatic cylinder 1102 increases, the baffle plate 1101 can be pushed to move towards each other, so as to block the position where the top middle of the lubrication cavity 10 communicates with the heating cavity 801.

[0060] like Figure 9 and Figure 10 As shown, the maintenance access door body 2 has a pneumatic assembly 12 located outside the lubrication chamber 10. The pneumatic assembly 12 includes a second pneumatic cylinder 1201, a second piston rod 1202, and a second connecting spring 1203.

[0061] The second pneumatic cylinder 1201 is fixedly installed inside the maintenance access door body 2 and is located in the middle of the outer side of the lubrication chamber 10. The second piston rod 1202 is movably installed on the inner wall of the second pneumatic cylinder 1201. The outer side of the second piston rod 1202 is elastically connected to the inner wall of the second pneumatic cylinder 1201 through the second connecting spring 1203.

[0062] The above solution is adopted: by setting a second connecting spring 1203, when the elastic force of the second connecting spring 1203 is released, it can push the two second piston rods 1202 to move in opposite directions.

[0063] like Figure 9 As shown, the second pneumatic cylinder 1201 is connected to the first pneumatic cylinder 1102 through the ventilation channel 13.

[0064] Using the above scheme: By providing a ventilation channel 13, when the second piston rod 1202 moves in opposite directions, the gas outside the inner cavity of the second pneumatic cylinder 1201 can be pushed through the second connecting spring 1203 into the outer inner cavity of the first pneumatic cylinder 1102.

[0065] Working principle and usage process of this invention:

[0066] First, when the rotating rod 401 and locking block 402 are solidified by the cold air, the cold air will also be transmitted to the rubber air bag 502 inside the oil reservoir 501, causing the rubber air bag 502 to contract due to the cold air. At this time, the elastic force of the second power spring 504 will be released smoothly, so as to push the moving piston block 503 downward until the top of the inner cavity of the oil reservoir 501 is connected to the connecting pipe 701. The lubricating oil in the inner cavity of the oil reservoir 501 will pass smoothly through the connecting pipe 701 and push the one-way valve column 703 to open. Then the lubricating oil will flow into the conveying groove 702.

[0067] The lubricating oil then flows in the conveying trough 702, which smoothly drives the drive water wheel 901 to rotate, and drives the first bevel gear 902 to rotate synchronously. At this time, due to the meshing relationship between the surfaces of the first bevel gear 902 and the second bevel gear 903, the second bevel gear 903 can be driven to rotate. Then, the linkage block 904 can be driven to rotate, causing the other end protruding part to move in a circular motion on the inner wall of the fixed block 803. This can then pull the fixed block 803 and the movable ring 802 to move back and forth left and right inside the heating chamber 801. Subsequently, some lubricating oil can be pushed into the lubrication chamber 10 for replenishment.

[0068] When the lubricating oil inside the lubrication chamber 10 is full, it will push the second piston rod 1202 to move in opposite directions, which will in turn push the gas inside the second pneumatic cylinder 1201 to be introduced into the first pneumatic cylinder 1102 through the ventilation channel 13. At this time, the air pressure inside the baffle plate 1101 will increase, and the two baffle plates 1101 will move in opposite directions to block the top opening of the lubrication chamber 10. Then, the heating chamber 801 will be filled with lubricating oil. Finally, the moving ring 802 will squeeze and push the lubricating oil to generate high temperature through back and forth movement, so as to heat up the locking block 402 and release the solidified state, so as to facilitate the subsequent smooth driving of the locking assembly 4 to release the fixation of the drive handwheel 301.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ship maintenance access door, characterized in that, Including the door frame (1); The inspection passage door body (2) is hinged to one side of the door frame (1); The door lock mechanism (3) is located in the middle of the inspection passage door body (2), and a locking component (4) is provided at one end. The trigger component (5) is located on the top of the maintenance access door body (2) and between the locking component (4) and the maintenance access door body (2); The conveying component (7) is located inside the maintenance access door body (2) and on one side of the triggering component (5); Heating assembly (8) includes heating chamber (801), which is located in the inner cavity of the maintenance access door body (2) and outside the locking assembly (4). A movable ring (802) is movably installed on the left side of the inner cavity of the heating chamber (801), and a fixing block (803) is provided on the top of the movable ring (802). A drive assembly (9) is provided inside the maintenance access door body (2) between the conveying assembly (7) and the heating chamber (801). The locking assembly (4) includes a rotating rod (401), a locking block (402), a rotating shaft (403), and a locking slot (404). The rotating rod (401) is threaded into one end of the drive handwheel (301), the locking block (402) is movably installed in the inner cavity of the drive handwheel (301), the rotating shaft (403) is fixedly installed at one end of the rotating rod (401) and located inside the locking block (402), and the locking slot (404) is opened inside the drive handwheel (301) and located on one side of the locking block (402); The triggering component (5) includes an oil reservoir (501), a rubber air bag (502), a movable piston block (503), and a second power spring (504). The oil reservoir (501) is located on the top of the maintenance access door body (2) and inside the rotating rod (401) and the maintenance access door body (2). The rubber air bag (502) is located at the bottom of the inner cavity of the oil reservoir (501). The movable piston block (503) is located on the top of the rubber air bag (502). The top of the movable piston block (503) is elastically connected to the inner wall of the oil reservoir (501) through the second power spring (504). The middle of the top of the oil reservoir (501) is fixedly connected to the oil guide valve (6). The conveying assembly (7) includes a connecting pipe (701), a conveying groove (702), a one-way valve column (703), and a first connecting spring (704). The connecting pipe (701) is fixedly connected between the oil storage tank (501) and the maintenance passage door body (2), and is located at the bottom of the moving piston block (503). The connecting pipe (701) is connected to the heating chamber (801) through the conveying groove (702). The one-way valve column (703) is movably installed on one side of the inner cavity of the conveying groove (702). The one-way valve column (703) is elastically connected to the inner wall of the conveying groove (702) through the first connecting spring (704).

2. The ship maintenance access door according to claim 1, characterized in that: The door lock mechanism (3) includes a drive handwheel (301), a fixed plate (302), a locking stop bar (303), a first power spring (304), and a drive push plate (305). The drive handwheel (301) is movably sleeved on the middle of the maintenance access door body (2), the fixed plate (302) is fixedly installed on the middle of the other side of the maintenance access door body (2), the locking stop bar (303) is movably installed on the back of the maintenance access door body (2), and its inner end is slidably sleeved with the fixed plate (302). The locking stop bar (303) is elastically connected to the fixed plate (302) through the first power spring (304), and the drive push plate (305) is fixedly sleeved on the surface of the drive handwheel (301) and the inner side of the fixed plate (302).

3. The ship maintenance access door according to claim 1, characterized in that: The drive assembly (9) includes a drive water turbine (901), a first bevel gear (902), a second bevel gear (903), and a linkage block (904). The drive turbine (901) is movably sleeved inside the maintenance access door body (2), and one end extends into the conveying trough (702). The first bevel gear (902) is fixedly sleeved on the other end surface of the drive turbine (901). The second bevel gear (903) is movably sleeved on the inner wall of the maintenance access door body (2) and located on one side of the first bevel gear (902). The linkage block (904) is fixedly sleeved on one end of the second bevel gear (903). The protruding part of one end of the linkage block (904) extends into the inner wall of the fixed block (803). The surfaces of the first bevel gear (902) and the second bevel gear (903) mesh with each other.

4. The ship maintenance access door according to claim 1, characterized in that: The maintenance access door body (2) has a lubrication cavity (10) between the movable ring (802) and the drive handwheel (301) inside, and a sealing component (11) located at the top center of the lubrication cavity (10) is provided inside the maintenance access door body (2).

5. The ship maintenance access door according to claim 4, characterized in that: The sealing assembly (11) includes a baffle plate (1101), a first pneumatic cylinder (1102) and a first piston rod (1103). The shield (1101) is movably installed inside the maintenance access door body (2) and located on both sides of the top center of the lubrication chamber (10). The first pneumatic cylinder (1102) is fixedly installed inside the maintenance access door body (2) and located outside the shield (1101). The first piston rod (1103) is movably installed in the inner cavity of the first pneumatic cylinder (1102) and its inner end is fixedly connected to the shield (1101).

6. The ship maintenance access door according to claim 1, characterized in that: The maintenance access door body (2) is provided with a pneumatic assembly (12) located outside the lubrication chamber (10). The pneumatic assembly (12) includes a second pneumatic cylinder (1201), a second piston rod (1202), and a second connecting spring (1203). The second pneumatic cylinder (1201) is fixedly installed inside the maintenance access door body (2) and located in the middle of the outer side of the lubrication chamber (10). The second piston rod (1202) is movably installed on the inner wall of the second pneumatic cylinder (1201). The outer side of the second piston rod (1202) is elastically connected to the inner wall of the second pneumatic cylinder (1201) through the second connecting spring (1203).

7. The ship maintenance access door according to claim 6, characterized in that: The second pneumatic cylinder (1201) is connected to the first pneumatic cylinder (1102) through the ventilation channel (13).

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