Weather-tight airtight door for ship

By introducing linkage and snap-fit ​​components into the steel doors of ships, the problem of difficulty in opening due to excessive door weight has been solved, enabling convenient operation of the doors in harsh sea conditions and improving safety.

CN224117494UActive Publication Date: 2026-04-14CIMC SHIP OCEAN ENG DESIGN & RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-11
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Existing ship steel doors have excessive weight due to the multiple latching structures, making them more difficult to open or close, especially in rough sea conditions.

Method used

The design employs linkage components and snap-fit ​​components. The linkage components are installed on the door frame to connect multiple snap-fit ​​components. The snap-fit ​​components are linked by a pull rope or other linkage structure, which reduces the overall weight and friction of the door leaf and simplifies the opening and closing process.

Benefits of technology

The weight and friction of the door panels have been reduced, improving the ease of opening and closing the doors in harsh sea conditions, reducing the risk of accidents, and ensuring cabin safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a weather-tight airtight door for a ship. The weather-tight airtight door comprises a door frame, a door leaf, a linkage piece and a plurality of buckling pieces. The door frame is installed on the cabin, and the door leaf is hinged to the door frame. The buckling piece is arranged on the door frame and can rotate relative to the door frame so as to be switched between the locking position and the unlocking position, and when the buckling piece is located at the locking position, the buckling piece can abut against the door leaf so as to limit the door leaf from rotating relative to the door frame, so that the door leaf is closed on the door frame. And when in the unlocking position, the fastener is separated from the door leaf, so that the door leaf can be opened. The linkage piece is arranged on the door frame and can rotate relative to the door frame, and the linkage piece is connected to the multiple buckling pieces so as to drive the multiple buckling pieces to be switched between the locking position and the unlocking position at the same time, and therefore the door leaf can be opened or closed conveniently. The buckling piece and the linkage piece are both arranged on the door frame, the overall weight of the door leaf can be reduced, friction force between the door leaf and the door frame is reduced, and opening or closing of the door leaf is facilitated.
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Description

Technical Field

[0001] This utility model relates to the field of marine technology, and in particular to a marine weatherproof and airtight door. Background Technology

[0002] Currently, medium and large ships typically have multiple compartments with different functions, such as living quarters, mechanical equipment compartments, and control compartments, and each compartment is equipped with a steel door. Ships inevitably come into contact with seawater while sailing on the ocean, and there is also a risk of fire, which affects the safety of personnel and equipment. Therefore, the steel doors of ship compartments need to be watertight and airtight.

[0003] In order to ensure the sealing performance of existing steel doors, multiple snap-fit ​​structures are usually set between the door leaf and the door frame to enhance the stability of the connection between the door leaf and the door frame, thereby ensuring the sealing performance of the steel door.

[0004] However, when multiple latches are installed on the door panel, a linkage mechanism is required to control the latches' locking and unlocking, thereby closing and opening the steel door. This results in an excessively heavy door panel, increasing the difficulty of opening or closing it. Utility Model Content

[0005] The purpose of this utility model is to provide a marine weatherproof and airtight door that can reduce the weight of the door leaf, thereby reducing the difficulty of opening or closing the door leaf.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] According to one aspect of this utility model, a marine weatherproof and airtight door is provided, comprising: a door frame mounted on a cabin; a door leaf hinged to the door frame and rotatable relative to the door frame, such that the door leaf can be opened relative to the door frame or closed on the door frame; and a latching member disposed on the door frame, the latching member being rotatable relative to the door frame to switch between a locked position and an unlocked position, wherein in the locked position, the latching member can abut against the door leaf to restrict the door leaf from moving. When the door frame is rotated, in the unlocked position, the fastener disengages from the door leaf, allowing the door leaf to rotate relative to the door frame. Multiple fasteners are provided and distributed around the periphery of the door leaf. A linkage is provided on the door frame and can move relative to it. The linkage is connected to the multiple fasteners, and when it moves relative to the door frame, it drives the multiple fasteners to rotate relative to the door frame, allowing the multiple fasteners to switch between the locked and unlocked positions.

[0008] In one embodiment of this application, the linkage is configured as a pull rope, which wraps around the door frame and is connected to a plurality of the buckle members.

[0009] In one embodiment of this application, the marine weatherproof and airtight door further includes a guide member, which is fixed on the door frame and located at the corner of adjacent sides of the door frame. The guide member is used to guide the pull rope.

[0010] In one embodiment of this application, the marine weatherproof and airtight door further includes a handle, which is rotatably connected to the door frame and connected to the pull rope for driving the pull rope to move relative to the door frame.

[0011] In one embodiment of this application, both ends of the pull cord are connected to the handle, and at least one end of the pull cord is wrapped around the handle so that when the handle rotates relative to the door frame, the handle can drive the pull cord to rotate relative to the door frame.

[0012] In one embodiment of this application, the fastener includes a snap-fit ​​part, a rotating part, and a linkage part. The snap-fit ​​part is used to abut against the door leaf, the rotating part is used to connect to the door frame, and the linkage part is used to connect to the linkage member. Both the snap-fit ​​part and the linkage part are connected to the rotating part, and the central axes of the snap-fit ​​part and the linkage part are set at an angle.

[0013] In one embodiment of this application, the linkage part is provided with a linkage groove, and the length of the linkage groove extends in the length direction of the linkage part. A linkage block is fixed on the linkage member, and the linkage block is installed in the linkage groove. When the linkage member rotates relative to the door frame, the linkage block can follow the movement of the linkage member and move relative to the linkage groove, so as to drive the buckle member to rotate relative to the door frame.

[0014] In one embodiment of this application, the marine weatherproof and airtight door further includes a sealing element, which is installed on the door leaf and abuts against the door leaf and the door frame when the door leaf is closed on the door frame.

[0015] In one embodiment of this application, the marine weatherproof and airtight door further includes a latch seat and a latch. The latch seat is fixed to the door leaf, and the latch is connected to the latch seat and can move relative to the latch seat so that one end of the latch extends out of the latch seat and abuts against the door frame.

[0016] In one embodiment of this application, the marine weatherproof door further includes a handle connected to the door leaf.

[0017] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0018] This utility model discloses a marine weatherproof and airtight door, comprising a door frame, a door leaf, a linkage component, and multiple latching components. The door frame is mounted on the cabin, and the door leaf is hinged to the door frame and can rotate relative to the door frame to open or close the door. The latching components are mounted on the door frame and can rotate relative to it to switch between a locked and unlocked position. In the locked position, the latching components abut against the door leaf, restricting its rotation relative to the door frame and keeping the door closed. In the unlocked position, the latching components disengage from the door leaf, allowing the door to open. The linkage component is mounted on the door frame and can rotate relative to it. The linkage component is connected to multiple latching components, enabling the multiple latching components to simultaneously switch between locked and unlocked positions, thus facilitating the opening and closing of the door.

[0019] Meanwhile, since the fasteners and linkages are all located on the door frame, the overall weight of the door leaf can be reduced, thereby reducing the friction between the door leaf and the door frame, which in turn makes it easier to open or close the door leaf. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a marine weatherproof and airtight door according to an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Another schematic diagram of a marine weatherproof door.

[0022] Figure 3 yes Figure 1 A partial schematic diagram of the handle of a marine weatherproof and airtight door.

[0023] Figure 4 yes Figure 1 A schematic diagram of the fastening components for a marine weatherproof and airtight door.

[0024] Figure 5 yes Figure 1 A partial schematic diagram of the fastening and linkage components of a marine weatherproof and airtight door.

[0025] Figure 6 yes Figure 1 A partial schematic diagram of a marine weatherproof and airtight door.

[0026] The annotations in the attached figures are explained as follows:

[0027] 10-Door frame; 20-Door leaf; 21-Hinge; 22-Observation window; 30-Snap fastener; 31-Snap-fit ​​part; 32-Rotating part; 33-Linkage part; 40-Linkage component; 41-Guide component; 42-Linkage block; 50-Handle; 61-Sealing component; 62-Handle; 63-Pin seat; 64-Pin; 331-Linkage groove. Detailed Implementation

[0028] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0029] In the description of this utility model, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back, etc.) are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications will also change accordingly.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In existing steel doors, multiple latching structures are typically installed between the door leaf and the frame to ensure sealing performance and enhance the stability of the connection. However, when multiple latching structures are installed on the door leaf, a linkage mechanism is required to control the locking and unlocking of the latches, thereby closing and opening the steel door. This results in excessive weight on the door leaf, increasing the difficulty of opening and closing it. Therefore, a marine weatherproof and airtight door is proposed to solve the above problems.

[0032] The solution is further illustrated by the following examples:

[0033] Figure 1 This is a schematic diagram of a marine weatherproof and airtight door according to an embodiment of the present invention. Figure 2 yes Figure 1 Another schematic diagram of a marine weatherproof door.

[0034] Please see Figure 1 and Figure 2 The marine weatherproof and airtight door of this embodiment can be used in the cabins of ships or in the cabins of offshore platforms to facilitate personnel entry and exit and to play a role in waterproofing and fireproofing, so as to ensure the safety of the cabins.

[0035] Specifically, a marine weatherproof and airtight door may include a door frame 10, a door leaf 20, a linkage 40, and multiple latching elements 30. The door frame 10 is mounted on the cabin, and the door leaf 20 is hinged to the door frame 10 and can rotate relative to the door frame 10, allowing the door leaf 20 to open relative to the door frame 10 or to close on the door frame 10. In this embodiment, the door leaf 20 is connected to the door frame 10 via a hinge 21. Furthermore, both the door frame 10 and the door leaf 20 are made of steel to improve their structural strength and ensure their safety.

[0036] Meanwhile, the latching element 30 is mounted on the door frame 10 and can rotate relative to the door frame 10 to switch between a locked position and an unlocked position. In the locked position, the latching element 30 can abut against the door leaf 20, such as... Figure 1 As shown, the latch 30 restricts the door leaf 20 from rotating relative to the door frame 10, and closes the door leaf 20 onto the door frame 10. In the unlocked position, the latch disengages from the door leaf 20, as shown. Figure 2 As shown, this allows the door leaf 20 to rotate relative to the door frame 10, making it convenient for the door leaf 20 to open relative to the door frame 10.

[0037] In this embodiment, multiple fasteners 30 are distributed around the door leaf 20, so that multiple fasteners 30 can simultaneously abut against the door leaf 20, thereby stably limiting and locking the door leaf 20 to the door frame 10, ensuring that the door leaf 20 is closed on the door frame 10, and preventing the door leaf 20 from automatically opening relative to the door frame 10 due to external force.

[0038] The linkage 40 is mounted on the door frame 10 and can move relative to the door frame 10. The linkage 40 is also connected to multiple latching parts 30. When the linkage 40 moves relative to the door frame 10, the linkage 40 can drive the multiple latching parts 30 to rotate relative to the door frame 10, so that the multiple latching parts 30 can switch between the locked position and the unlocked position at the same time, so as to facilitate locking or unlocking the door leaf 20.

[0039] It should be noted that since both the latching component 30 and the linkage component 40 are located on the door frame 10, compared to setting the latching component 30 and the linkage component 40 on the door leaf 20, the overall weight of the door leaf 20 can be reduced, thereby reducing the friction between the door leaf 20 and the door frame 10, which facilitates the relative rotation of the door leaf 20, that is, facilitates the opening and closing of the door leaf 20.

[0040] Furthermore, it should be noted that when encountering severe sea conditions, the opening or closing of the door 20 becomes more difficult than under normal conditions due to pressure differences or water pressure. Therefore, reducing the overall weight of the door 20 can improve the ease of opening or closing it under severe sea conditions, thereby reducing the risk of accidents.

[0041] See Figure 1 and Figure 2 The linkage 40 can be set as a pull rope, which is wrapped around the door frame 10 and connected to multiple buckle 30, so that the pull rope can drive multiple buckle 30 to rotate at the same time, thereby allowing the buckle 30 to switch between the locked position and the unlocked position.

[0042] Specifically, in this embodiment, the pull rope can be set as a steel wire rope or steel wire, etc., to drive multiple buckle parts 30 in linkage.

[0043] In some other embodiments, the linkage 40 can also be configured as a chain, steel belt, or transmission link, so that the linkage 40 can drive multiple buckle parts 30 to move together.

[0044] See Figure 1 and Figure 2 The marine weatherproof and airtight door may also include a guide member 41. The guide member 41 is fixed to the door frame 10 and located at the corner of the adjacent two sides of the door frame 10, so that the guide member 41 can be used to guide the pull rope so that the pull rope is wrapped around the door frame 10.

[0045] In this embodiment, multiple guide members 41 are provided, and the multiple guide members 41 are located at the corner of the door frame 10 so that the pull rope is guided by the guide members 41 to wrap around the door frame 10 and be located on the outer periphery of the door leaf 20, so as to avoid the pull rope affecting the opening or closing of the door leaf 20.

[0046] It should be noted that, because the pull rope is flexible, it is prone to loosening when its extension direction changes. Therefore, multiple guides 41 are provided to tension the pull rope, thereby ensuring that the pull rope can drive multiple locking devices 30 in conjunction, and facilitating operation by the operator.

[0047] Specifically, the guide 41 can be configured as a rotating sleeve, a rotating bearing, or a cylindrical pin, so that the guide 41 can both resist the pull rope and allow the pull rope to slide relative to itself.

[0048] See Figure 1 and Figure 2The marine weatherproof and airtight door may also include a handle 50. The handle 50 is rotatably connected to the door frame 10 and to a pull rope, allowing the handle 50 to move the pull rope relative to the door frame 10, thereby causing the pull rope to rotate multiple latching members 30. That is, when the operator turns the handle 50, the handle 50 can move the latching members 30 between a locked position and an unlocked position via the pull rope, i.e., via the linkage 40, thus allowing the door 20 to open or close.

[0049] See Figure 3 In this embodiment, both ends of the pull rope are connected to the handle 50, and at least one end of the pull rope is wrapped around the handle 50 so that when the handle 50 rotates relative to the door frame 10, the handle 50 can drive the pull rope to rotate relative to the door frame 10.

[0050] Specifically, one end of the pull rope is directly connected to the spool of the handle 50, and the other end is wound around the spool of the handle 50. When the handle 50 rotates, the end of the pull rope directly connected to the handle 50 is wound around the spool, while the end wound around the spool is unwound from the spool, so that the pull rope can remain taut and rotate relative to the door frame 10, thereby driving the buckle 30 to rotate.

[0051] In this embodiment, both ends of the pull cord are wound around the handle 50, and the two ends of the pull cord are wound in opposite directions on the spool of the handle 50. That is, one end of the pull cord is wound counterclockwise on the spool of the handle 50, and the other end of the pull cord is wound clockwise on the spool of the handle 50. Thus, when the handle 50 is rotated, one end of the pull cord continues to be wound on the spool, while the other end is unwound from the spool. This allows the handle 50 to drive the pull cord to rotate relative to the door frame 10, and also to drive the buckle 30 to rotate.

[0052] In some other embodiments, the handle 50 can move in a straight line relative to the door frame 10, that is, the handle 50 can drive the pull rope to move relative to the door frame 10 by moving in a straight line, thereby driving the buckle 30 to rotate relative to the door frame 10.

[0053] Figure 4 yes Figure 1 A schematic diagram of the fastening components for a marine weatherproof and airtight door. Figure 5 yes Figure 1 A partial schematic diagram of the fastening and linkage components of a marine weatherproof and airtight door.

[0054] See Figure 4 and Figure 5The latching member 30 may include a latching part 31, a rotating part 32, and a linkage part 33. Both the latching part 31 and the linkage part 33 are connected to the rotating part 32. The latching part 31 abuts against the door leaf 20; that is, in the locked position, the latching part 31 abuts against the door leaf 20. The linkage part 33 connects to the linkage member 40, allowing the linkage member 40 to drive the latching member 30 to rotate. The rotating part 32 connects to the door frame 10. Specifically, the rotating part 32 has a through hole, and a mounting post is provided on the door frame 10. The rotating part 32 fits onto the outer side of the mounting post through the through hole and can rotate relative to the mounting post, allowing the latching member 30 to rotate relative to the door frame 10.

[0055] In this embodiment, the central axes of the latching part 31 and the linkage part 33 are set at an angle, so that after the linkage part 33 is connected to the linkage member 40, the linkage member 40 can easily drive the latching member 30 to move between the locked position and the unlocked position. Specifically, in this embodiment, the included angle between the central axes of the latching part 31 and the linkage part 33 is an obtuse angle.

[0056] Meanwhile, a linkage groove 331 can be provided on the linkage part 33, and the length of the linkage groove 331 extends in the length direction of the linkage part 33. In addition, a linkage block 42 is fixed on the linkage member 40, and the linkage block 42 is installed in the linkage groove 331. When the linkage member 40 rotates relative to the door frame 10, the linkage block 42 can move with the linkage member 40 and move relative to the linkage groove 331, so that while the linkage block 42 moves relative to the linkage part 33, it drives the latching member 30 to rotate relative to the door frame 10, thereby allowing the latching member 30 to rotate between the locked position and the unlocked position. It should be noted that the linkage member 40 and the latching member 30 are connected by the linkage block 42 and the linkage groove 331, which can prevent the linkage member 40 from becoming tense due to the rotation of the latching member 30 during the movement, and can also prevent the linkage member 40 from becoming tense and causing increased friction or jamming, thereby facilitating the operation of the operator.

[0057] In this embodiment, the linkage block 42 can be configured as a fixing pin, a fixing latch, or a fixing bolt, so that when the linkage block 42 moves relative to the linkage groove 331, it drives the buckle 30 to rotate relative to the door frame 10.

[0058] In some other embodiments, the linkage 40 can be directly fixed to the buckle 30 to drive the buckle 30 to rotate relative to the door frame 10. Specifically, the linkage part 33 of the buckle 30 is fixed with a bolt, and the pull rope is fixed to the bolt, so that the pull rope can drive the buckle 30 to rotate through the bolt.

[0059] Figure 6 yes Figure 1 A partial schematic diagram of a marine weatherproof and airtight door.

[0060] See Figure 6 Marine weatherproof and airtight doors may also include a seal 61. The seal 61 is installed on the door leaf 20 and is set along the edge of the door leaf 20, so that when the door leaf 20 is closed on the door frame 10, the seal 61 abuts against the gap between the door leaf 20 and the door frame 10 to seal the gap between the door leaf 20 and the door frame 10 and prevent wind, rain, seawater or harmful gases from entering the cabin.

[0061] Specifically, the sealing element 61 can be configured as a sealing strip, fireproof rubber strip, etc., to achieve the purpose of sealing and fireproofing.

[0062] See Figure 1 and Figure 2 Marine weatherproof doors may also include a latch seat 63 and a latch 64. The latch seat 63 is fixed to the door leaf 20, and the latch 64 is connected to the latch seat 63 and can move relative to the latch seat 63, so that one end of the latch 64 extends out of the latch seat 63 and abuts against the door frame 10, thereby restricting the door leaf 20 to the door frame 10. At the same time, both the latch seat 63 and the latch 64 are located inside the cabin to prevent the door leaf 20 from being forcibly opened from the outside of the cabin.

[0063] Additionally, the marine weatherproof and airtight door may include a handle 62 and an observation window 22. The handle 62 is connected to the door leaf 20 to open or close the door leaf 20, facilitating operation. The observation window 22 is located on the door leaf 20 to allow for viewing of the interior and exterior of the cabin.

[0064] In summary, the door frame 10 is mounted on the cabin, and the door leaf 20 is hinged to the door frame 10 and can rotate relative to the door frame 10 to open or close the door leaf 20. A latching element 30 is mounted on the door frame 10 and can rotate relative to the door frame 10 to switch between a locked position and an unlocked position. In the locked position, the latching element 30 abuts against the door leaf 20 to restrict the rotation of the door leaf 20 relative to the door frame 10, thus closing the door leaf 20 on the door frame 10. In the unlocked position, the latching element 30 disengages from the door leaf 20, allowing the door leaf 20 to open. A linkage element 40 is mounted on the door frame 10 and can rotate relative to the door frame 10. The linkage element 40 is connected to multiple latching elements 30 to simultaneously switch between the locked and unlocked positions, thereby facilitating the opening or closing of the door leaf 20.

[0065] Meanwhile, since both the buckle 30 and the linkage 40 are set on the door frame 10, the overall weight of the door leaf 20 can be reduced, thereby reducing the friction between the door leaf 20 and the door frame 10, which in turn facilitates the opening or closing of the door leaf 20.

[0066] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A marine weatherproof and airtight door, characterized in that, The marine weatherproof and airtight door includes: The door frame is installed on the cabin. A door leaf is hinged to the door frame and is rotatable relative to the door frame, so that the door leaf can be opened relative to the door frame or closed on the door frame; A latching element is provided on the door frame. The latching element can rotate relative to the door frame to switch between a locked position and an unlocked position. In the locked position, the latching element can abut against the door leaf to restrict the rotation of the door leaf relative to the door frame. In the unlocked position, the latching element disengages from the door leaf to allow the door leaf to rotate relative to the door frame. Multiple latching elements are provided and distributed around the periphery of the door leaf. A linkage component is disposed on the door frame and is capable of moving relative to the door frame. The linkage component is connected to multiple latching components, and when the linkage component moves relative to the door frame, the linkage component can drive the multiple latching components to rotate relative to the door frame, so that the multiple latching components can switch between the locked position and the unlocked position.

2. The marine weatherproof and airtight door according to claim 1, characterized in that, The linkage is configured as a pull rope, which wraps around the door frame and is connected to multiple of the buckle components.

3. The marine weatherproof and airtight door according to claim 2, characterized in that, It also includes a guide, which is fixed to the door frame and located at the corner of adjacent two sides of the door frame. The guide is used to guide the pull rope.

4. The marine weatherproof and airtight door according to claim 2, characterized in that, It also includes a handle, which is rotatably connected to the door frame and connected to the pull cord for moving the pull cord relative to the door frame.

5. The marine weatherproof and airtight door according to claim 4, characterized in that, Both ends of the pull cord are connected to the handle, and at least one end of the pull cord is wrapped around the handle so that when the handle rotates relative to the door frame, the handle can drive the pull cord to rotate relative to the door frame.

6. The marine weatherproof and airtight door according to claim 1, characterized in that, The fastener includes a snap-fit ​​part, a rotating part, and a linkage part. The snap-fit ​​part is used to abut against the door leaf, the rotating part is used to connect to the door frame, and the linkage part is used to connect to the linkage component. Both the snap-fit ​​part and the linkage part are connected to the rotating part, and the central axes of the snap-fit ​​part and the linkage part are set at an angle.

7. The marine weatherproof and airtight door according to claim 6, characterized in that, The linkage part has a linkage groove, and the length of the linkage groove extends in the length direction of the linkage part. A linkage block is fixed on the linkage member, and the linkage block is installed in the linkage groove. When the linkage member rotates relative to the door frame, the linkage block can follow the movement of the linkage member and move relative to the linkage groove, so as to drive the buckle to rotate relative to the door frame.

8. The marine weatherproof and airtight door according to claim 1, characterized in that, It also includes a seal that is installed on the door leaf and abuts against the door leaf and the door frame when the door leaf is closed on the door frame.

9. The marine weatherproof and airtight door according to claim 1, characterized in that, It also includes a latch seat and a latch, the latch seat being fixed to the door leaf, the latch being connected to the latch seat and movable relative to the latch seat, such that one end of the latch extends out of the latch seat and abuts against the door frame.

10. The marine weatherproof and airtight door according to claim 1, characterized in that, It also includes a handle, which is attached to the door leaf.