Weatherproof door with high sealing properties
By designing a highly airtight weatherproof door, using a 907A steel door frame and Q345B steel door leaf, and combining a lifting device and a raised design for the sealing strip, the problem of insufficient sealing performance of watertight doors has been solved, achieving a high sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN HUANGSHAN MARINE FITTING
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-23
AI Technical Summary
Existing watertight doors have insufficient sealing performance and cannot meet the high sealing requirements of ships.
A highly airtight weatherproof door was designed, with a door frame made of 907A steel and door panels made of Q345B steel. The inside of the door panels is equipped with a locking device and an opening handle, a lifting device, and a movable hinge. The bottom of the sealing strip has raised parts on both the inner and outer sides to enhance the sealing effect.
The special design of the lifting device and sealing strip improves the sealing performance between the door frame and the door leaf, making it suitable for ships with high sealing requirements.
Smart Images

Figure CN224392911U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a highly airtight weatherproof door, belonging to the field of marine technology. Background Technology
[0002] To ensure a high level of water resistance, some compartments on ships are typically equipped with watertight doors. Currently, the door frame and door panel of watertight doors are sealed with waterproof rubber strips. However, to ensure smooth opening and closing of the door, the seal between the waterproof rubber strip and the door frame is still not tight enough, resulting in insufficient sealing performance. Therefore, it cannot be used in ships with high sealing requirements. Utility Model Content
[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a weatherproof door with good sealing effect, suitable for ships with high sealing requirements.
[0004] The purpose of this utility model is achieved as follows:
[0005] A highly airtight weatherproof door includes a door frame and a door leaf. The inner side of the door leaf is equipped with a locking device and an opening handle. The locking device includes multiple connecting rods and a locking head. A door leaf handle is also provided on the door leaf. A lifting device is also installed on the inner side of the door leaf, including a control handwheel connected to a lifting chain within the door leaf. An outer cover is provided around the control handwheel and the lifting chain. The hinge between the door leaf and the door frame is a movable hinge that moves up and down with the door leaf. A sealing strip is installed in the gap between the door frame and the door leaf. The bottom inner and outer sides of the sealing strip each have a protrusion, creating a recess in the middle.
[0006] The door frame is made of 907A steel, and the door leaf is made of Q345B steel.
[0007] The door leaf has a round window.
[0008] This utility model of a highly airtight weatherproof door has the following advantages:
[0009] This highly airtight weatherproof door incorporates a lifting mechanism that slightly raises the door leaf when opening and slightly lowers it when closing, allowing the sealing strip to better seal the gap between the door frame and the door leaf. Furthermore, the sealing strip features a raised section on both the inner and outer sides at its bottom, creating a recessed center. This two-foot-like structure allows the sealing strip to deform under pressure, further enhancing the seal between the inside and outside of the door. This significantly improves the door's airtightness, making it suitable for ships with high sealing requirements. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the highly airtight weatherproof door of this utility model when it is opened.
[0011] Figure 2 This is a schematic diagram of the highly airtight weatherproof door of this utility model when closed.
[0012] Figure 3 This is an enlarged view of the sealing strip at the bottom of the door frame and door leaf in the high-sealing weatherproof door of this utility model.
[0013] In the diagram: 1. Door frame; 2. Door leaf; 3. Round window; 4. Locking device; 5. Opening handle; 6. Door leaf handle; 7. Lifting device; 8. Control handwheel; 9. Exterior cover; 10. Movable hinge; 11. Sealing strip; 12. Protrusion. Detailed Implementation
[0014] like Figures 1 to 3 This utility model relates to a highly airtight weatherproof door, including a door frame 1 and a door leaf 2. The door frame 1 is made of 907A steel, and the door leaf 2 is made of Q345B steel. The door leaf 2 has a round window 3 for observing the situation inside and outside the door. The inside of the door leaf 2 is provided with a locking device 4 and an opening handle 5. The locking device 4 includes multiple connecting rods and a locking head. The door is opened or locked by rotating the opening handle 5. The door leaf 2 is also provided with a door leaf handle 6 for opening and closing the door.
[0015] The inner side of the door leaf 2 is also equipped with a lifting device 7. The lifting device 7 includes a control handwheel 8, which is connected to the lifting chain in the door leaf 2. An outer cover 9 is provided outside the control handwheel and the lifting chain. By rotating the control handwheel 8, the door leaf 2 is raised and lowered slightly. The hinge between the door leaf 2 and the door frame 1 is a movable hinge 10, which can be raised and lowered together with the door leaf 2.
[0016] A sealing strip 11 is installed in the gap between the door frame 1 and the door leaf 2. The sealing strip 11 is made of neoprene rubber, and the structure of the sealing strip 11 at the bottom of the door leaf 2 is specially designed. A protrusion 12 is provided on the inner and outer sides of the bottom of the sealing strip 11, so that the middle is concave. This forms two feet, which can better seal the inside and outside of the door after the sealing strip 11 is squeezed and deformed.
Claims
1. A highly airtight weatherproof door, characterized in that: The device includes a door frame and a door leaf. The inner side of the door leaf is equipped with a locking device and an opening handle. The locking device includes multiple connecting rods and a locking head. The door leaf is also equipped with a door leaf handle. The inner side of the door leaf is also equipped with a lifting device, which includes a control handwheel connected to a lifting chain in the door leaf. The control handwheel and the lifting chain are covered with an outer cover. The hinge between the door leaf and the door frame is a movable hinge that moves up and down with the door leaf. A sealing strip is installed in the gap between the door frame and the door leaf. The bottom inner and outer sides of the sealing strip are respectively provided with a protrusion, making the middle recessed.
2. The high-sealing weatherproof door according to claim 1, characterized in that: The door frame is made of 907A steel, and the door leaf is made of Q345B steel.
3. The high-sealing weatherproof door according to claim 1, characterized in that: The door leaf has a round window.