Multifunctional steel air-tight door
By designing connection structures such as hinges and load-bearing rods, the installation and maintenance of multi-functional steel airtight doors are simplified, solving the problem of high cost caused by complex structures in existing technologies. Stable connection and high airtightness are achieved, making them suitable for flammable and explosive environments such as chemical, petroleum, and natural gas industries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-03-31
AI Technical Summary
Existing multi-functional steel airtight doors have complex structures, high installation and maintenance costs, and complicated subsequent maintenance.
The door body and frame are connected by hinges, L-shaped and straight load-bearing bars, etc., to ensure a stable connection and airtightness. Combined with the design of sealing strips and reinforcing ribs, the door body and frame are connected by a stable connection and airtightness.
It simplifies the installation process, reduces installation and maintenance costs, and improves the door's airtightness and stability, ensuring safety in flammable and explosive environments.
Smart Images

Figure CN224064223U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of airtight door technology, and in particular relates to a multifunctional steel airtight door. Background Technology
[0002] In the chemical, oil, and natural gas industries, there are large quantities of flammable, explosive, toxic, and hazardous substances. The consequences of leaks, explosions, or fires are unimaginable. Multifunctional steel airtight doors can effectively prevent the spread of fire and toxic gases, buying valuable time for evacuation and rescue efforts.
[0003] Currently, multi-functional steel airtight doors are relatively expensive to install due to their complex structure and diverse functions, requiring specialized technicians and equipment. Furthermore, their maintenance is also complex, necessitating regular checks of the door's performance and replacement or repair of seals and hardware, resulting in higher maintenance costs. Utility Model Content
[0004] In response to the above situation, in order to overcome the shortcomings of existing technologies, such as complex structure and complicated maintenance.
[0005] The technical solution adopted by this utility model is as follows: a multifunctional steel airtight door, including a door frame and a door body, the door body being disposed on the door frame, and a connecting structure disposed between the door frame and the door body, the connecting structure being used to achieve a stable connection between the door body and the door frame, the rear side of the door body being disposed as an integral plate.
[0006] Furthermore, the connection structure includes hinge one, hinge two, an L-shaped pressure rod, and a straight pressure rod. Hinge one is symmetrically fixed to the inner side of the door frame along the central axis of the door frame. Hinge two is fixed to the front side of the door body corresponding to the part of hinge one. One end of the L-shaped pressure rod is rotatably connected to the end of hinge one. One end of the straight pressure rod is rotatably connected to the end of hinge two. The other end of the L-shaped pressure rod is rotatably connected to the other end of the straight pressure rod.
[0007] Furthermore, several sets of reinforcing ribs are fixed to the front side of the door body, and the reinforcing ribs are symmetrically arranged along the central axis of the door body.
[0008] Furthermore, a connecting rod is fixedly connected between the L-shaped bearing rods, and a connecting rod is fixedly connected between the straight bearing rods.
[0009] Furthermore, a sealing strip is provided around one side edge of the door frame and the corresponding part of the door body, and a barrier is fixed to one side edge of the door frame, with the sealing strip snapped between the barriers.
[0010] Furthermore, the door frame is arranged in a C-shape, and several partitions are provided between the frames.
[0011] The beneficial effects of this utility model after adopting the above structure are as follows:
[0012] The door body is designed with a one-piece plate on one side and a connecting structure that connects it to the door frame on the other side, ensuring airtightness with the sealed side. The door body is also designed with hinges 1 and 2, L-shaped pressure rods and straight pressure rods in the connecting structure, as well as connecting rods 1 and 2, ensuring stable rotation between the door frame and the door body. Attached Figure Description
[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a half-sectional diagram of the utility model in use.
[0016] Figure 3 This is a half-sectional schematic diagram of the overall structure of this utility model;
[0017] Figure 4 for Figure 2 Enlarged view of part A.
[0018] In the attached diagram: 1. Door frame, 2. Door body, 3. Gravity mechanism, 4. Hinge 1, 5. Hinge 2, 6. L-shaped load-bearing rod, 7. Straight load-bearing rod, 8. Connecting rod 1, 9. Connecting rod 2, 10. Reinforcing rib, 11. Enclosure, 12. Sealing strip, 13. Partition. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0020] 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.
[0021] like Figure 1 As shown, a multifunctional steel airtight door includes a door frame 1 and a door body 2. The door body 2 is mounted on the door frame 1, and a connecting structure is provided between the door frame 1 and the door body 2. The connecting structure is used to achieve a stable connection between the door body 2 and the door frame 1. The rear side of the door body 2 is set as an integral plate, which has the effects of fireproofing, anti-theft and sealing. The door body 2 is set as an inward opening type. The greater the pressure on the inside, the tighter the sealing strip 12 is attached to the door body 1, and the stronger the airtightness, which has the effects of waterproofing, pressure resistance and explosion resistance.
[0022] like Figure 1-2 As shown in -3-4, the connection structure includes hinge 1 4, hinge 2 5, L-shaped pressure rod 6 and straight pressure rod 7. Hinge 1 4 is symmetrically fixed to the inner side of the door frame 1 along the central axis of the door frame 1. Hinge 2 5 is fixed to the front side of the door body 2 corresponding to the part of hinge 1 4. One end of L-shaped pressure rod 6 is rotatably connected to the end of hinge 1 4. One end of straight pressure rod 7 is rotatably connected to the end of hinge 2 5. The other end of L-shaped pressure rod 6 is rotatably connected to the other end of straight pressure rod 7.
[0023] Among them, connecting rod 1 8 is fixed between L-shaped bearing rods 6, and connecting rod 2 9 is fixed between straight bearing rods 7 to enhance the stability of the connection structure. The sealing strip 12 of the door body 2, which is an integral plate on one side and connected to the door frame 1 on the other side through the connection structure, ensures the airtightness with the sealing side. Several sets of reinforcing ribs 10 are fixed to the front side of the door body 2. The reinforcing ribs 10 are symmetrically arranged along the central axis of the door body 2. A sealing strip 12 is provided around the edge of one side of the door frame 1 and the corresponding part of the door body 2. A barrier 11 is fixed to the edge of one side of the door frame 1. The sealing strip 12 is snapped between the barriers 11. The door frame 1 is set in a C-shaped frame, and several partitions 13 are provided between the frames. The linkage between hinge 1 4, hinge 2 5, L-shaped bearing rods 6 and straight bearing rods 7 and connecting rod 1 8 and connecting rod 2 9 in the connection structure ensures the stable connection and rotation between the door frame 1 and the door body 2.
[0024] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A multi-functional steel security door, characterised in that: The utility model provides a door frame (1) and door body (2), door body (2) is set up on door frame (1), and the connecting structure is set up between door frame (1) and door body (2), the connecting structure is used for realizing the stable connection of door body (2) and door frame (1), and the rear side of door body (2) is integrally plate-like and is set up, The connecting structure includes hinge one (4), hinge two (5), L type pressure bar (6) and straight type pressure bar (7), hinge one (4) is fixedly connected to the inboard of door frame (1) along the center axis symmetry of door frame (1), hinge two (5) is fixedly connected to the corresponding part of hinge one (4) on the front side of department body (2), one end of L type pressure bar (6) is rotatably connected with the end of hinge one (4), one end of straight type pressure bar (7) is rotatably connected with the end of hinge two (5), and the other end of L type pressure bar (6) is rotatably connected with the other end of straight type pressure bar (7).
2. The multi-functional steel security door according to claim 1, wherein: Connecting rod one (8) is fixedly connected between L type pressure bar (6), and connecting rod two (9) is fixedly connected between straight type pressure bar (7).
3. The multi-functional steel security door according to claim 2, wherein: The front side of door body (2) is fixedly connected with a plurality of groups of reinforcing ribs (10), and the reinforcing ribs (10) are symmetrically arranged along the center axis of door body (2).
4. The multi-functional steel security door according to claim 3, wherein: The edge of one side of door frame (1) is provided with a sealing strip (12) around the corresponding part of door body (2), the edge of one side of door frame (1) is fixedly connected with a surrounding fence (11), and the sealing strip (12) is clamped between the surrounding fences (11).
5. The multi-functional steel security door according to claim 4, wherein: The door frame (1) is provided with a C-shaped frame, and a plurality of partitions (13) are arranged between the frames.