Folding protective air-tight door

Abstract

The utility model provides a folding type protective air-tight door which comprises a door frame wall and a door leaf assembly, the door leaf assembly comprises a plurality of door leaf units, and a first hinge and a bolt mechanism are arranged between every two adjacent door leaf units. The first hinge and the bolt mechanism are located on the two sides of the door leaf unit respectively. The bolt mechanism comprises bolts and bolt seats, the bolt seats are arranged on the two adjacent door leaf units respectively, and bolt holes are formed in the bolt seats; when the door leaf assembly is in an unfolded state, the bolt is inserted into the bolt seat of the adjacent door leaf unit; and when the door leaf assembly is in a folded state, the bolt is pulled out from the bolt seat of the adjacent door leaf unit. The door leaf assembly is formed by connecting the door leaf units through the hinges, and when the plug pins are pulled out, the door leaf units can be folded in a Z shape; the door leaf assembly can be folded when opened, the space reserved for door leaf movement is greatly reduced, the door leaf assembly is particularly suitable for underground civil air defense engineering with limited space, and the flexibility and practicability of overall space planning are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of protective doors, and particularly relates to a folding protective airtight door. Background Art

[0002] In some existing urban civil air defense engineering facilities, multiple protective airtight doors are provided. The protective airtight doors are used to intercept nuclear and conventional weapon shock waves and prevent radioactive contamination and chemical warfare agents from penetrating into the interior of the engineering facilities.

[0003] The structure of the existing protective seal door is as Figure 6 shown, including a doorframe wall 1 and a door leaf 8. A passage is provided on the doorframe wall 1; one side of the door leaf is hinged to the doorframe wall 1 through a hinge. However, the door leaf 2 in the existing protective airtight door is of an integral structure. When the door leaf 8 is opened or closed, the swept area of the door leaf 8 is relatively large, and a relatively large space needs to be reserved for the opening and closing of the door leaf to ensure the normal opening and closing of the door leaf. This reserved space cannot be used normally, thus reducing the space utilization rate in the civil air defense engineering facilities; moreover, due to the large weight of the integral door leaf structure, large lifting equipment needs to be used for auxiliary installation during installation, which is rather troublesome. Summary of the Invention

[0004] The purpose of the utility model is to solve the deficiencies in the prior art and provide a folding protective airtight door.

[0005] The purpose of the utility model is achieved through the following technical solutions: a folding protective airtight door, including a doorframe wall and a door leaf assembly. The door leaf assembly includes a plurality of door leaf units. A first hinge and a bolt mechanism are provided between adjacent door leaf units; the first hinge and the bolt mechanism are respectively located on both sides of the door leaf unit; the bolt mechanism includes a bolt and a bolt seat. The bolt seats are respectively arranged on two adjacent door leaf units, and bolt holes are provided on the bolt seats;

[0006] When the door leaf assembly is in the unfolded state, the bolt is inserted into the bolt seat of the adjacent door leaf unit; when the door leaf assembly is in the folded state, the bolt is pulled out from the bolt seat of the adjacent door leaf unit.

[0007] Preferably, the door leaf unit includes a door leaf outer shell body, and a structural reinforcement member and a concrete filling body are arranged inside the door leaf outer shell body.

[0008] Preferably, the structural reinforcement member is in a long strip shape and is arranged along the height direction of the door leaf unit, and the cross section of the structural reinforcement member is in a "U" shape.

[0009] Preferably, a passage is provided on the doorframe wall, and a sealing strip is arranged on the periphery of the passage.

[0010] Preferably, one side of the door assembly is connected to the door frame wall via a second hinge, and a locking mechanism is provided on the door assembly.

[0011] Preferably, a sealing gasket is provided on the connecting surface of adjacent door leaf units; when the door leaf assembly is in the unfolded state, the sealing gasket seals the gap between adjacent door leaf units.

[0012] Preferably, the pin includes a pin body, a channel is provided in the pin body, a piston and a threaded body are provided in the channel, and the threaded body is threadedly engaged with the inner wall of the channel; the threaded body and the piston are connected by a connecting rod; a grease storage space is provided between the piston and the bottom of the channel, and grease is stored in the grease storage space; the pin body is provided with an overflow hole communicating with the grease storage space.

[0013] The beneficial effects of this utility model are:

[0014] 1. The door assembly of this utility model is composed of several door units connected by hinges. When the latch is pulled out, the door units can be folded in a "Z" shape. When the door assembly is opened, it can be folded up, which greatly reduces the space reserved for door movement. The space saved can be used to add equipment, material storage areas or passageways, which is especially suitable for underground civil defense projects with limited space, and improves the flexibility and practicality of the overall space planning.

[0015] 2. This utility model disassembles the door assembly into multiple door units. This split structure design greatly reduces the weight of individual components. During installation, no heavy equipment is required. The transportation and installation of a single door unit can be completed by a small hydraulic lifting device or a hand chain hoist, reducing the requirements for construction conditions and equipment, and greatly reducing the difficulty of door installation. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention.

[0017] Figure 2 This is a schematic diagram of the present invention in the closed state.

[0018] Figure 3 for Figure 2 Enlarged view of section A.

[0019] Figure 4 This is a schematic diagram of the present invention in the open state.

[0020] Figure 5 This is a schematic diagram of the pin structure.

[0021] Figure 6 This is a schematic diagram of an existing protective airtight door.

[0022] In the diagram: 1. Door frame wall; 1-1. Passageway; 1-2. Sealing strip; 2. Door leaf unit; 2-1. Door leaf outer shell; 2-2. Concrete filler; 2-3. Structural reinforcement; 3. First hinge; 4. Second hinge; 5. Locking mechanism; 6. Pin mechanism; 6-1. Pin seat; 6-2. Pin; 6-2a. Pin body; 6-2b. Overflow hole; 6-2c. Piston; 6-2d. Threaded body; 6-2e. Screwdriver notch; 6-2f. Internal thread; 6-2g. Connecting rod; 6-2h. Grease storage space; 7. Sealing gasket; 8. Door leaf. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 are within the protection scope of the present utility model.

[0024] like Figures 1 to 5 As shown, the folding protective airtight door includes a door frame wall 1 and a door leaf assembly. The door leaf assembly includes several door leaf units 2. A first hinge 3 and a latch mechanism 6 are provided between adjacent door leaf units 2. The first hinge 3 and the latch mechanism 6 are located on both sides of the door leaf unit 2. The latch mechanism 6 includes a latch 6-2 and a latch seat 6-1. The latch seat 6-1 is respectively provided on two adjacent door leaf units 2, and the latch seat 6-1 is provided with a latch 6-2 hole.

[0025] When the door assembly is in the unfolded state, the latch 6-2 is inserted into the latch seat 6-1 of the adjacent door unit 2; when the door assembly is in the folded state, the latch 6-2 is pulled out from the latch seat 6-1 of the adjacent door unit 2.

[0026] The door assembly of this utility model is composed of several door units 2 connected by hinges. When the pin 6-2 is pulled out, the door units 2 can be folded in a "Z" shape. When the door assembly is opened, it can be folded up, which greatly reduces the space reserved for door movement. The space saved can be used to add equipment, material storage areas or passageways 1-1. It is especially suitable for underground civil defense projects with limited space, improving the flexibility and practicality of the overall space planning.

[0027] When the door assembly is in the unfolded state, adjacent door units 2 are fixedly connected by a latch mechanism 6, and the entire door assembly forms a tight whole, which can effectively resist nuclear explosion shock waves, radioactive contamination, and chemical warfare agent infiltration, with protective performance consistent with traditional integrated door panels.

[0028] Traditional one-piece door panels are heavy and require large lifting equipment for hoisting, resulting in high installation costs and complex operations. This invention disassembles the door panel assembly into multiple door panel units 2. This split structure design greatly reduces the weight of individual components. During installation, no heavy equipment is needed; a small hydraulic lifting device or a hand-operated hoist can be used to transport and install a single door panel unit 2, reducing the requirements for construction conditions and equipment, and significantly simplifying the installation process.

[0029] The door leaf unit 2 includes a door leaf outer shell 2-1, within which structural reinforcement members 2-3 and concrete filler are installed. The structural reinforcement members 2-3 are arranged along the height of the door leaf unit 2, and their cross-sections are shaped like the letter "U". The door leaf outer shell 2-1 is made of steel, providing an external protective surface that effectively resists direct impacts from explosive fragments and impact loads. The internal concrete filler is inserted into the door leaf outer shell 2-1, utilizing the compressive strength and density of concrete to enhance the overall weight and blast resistance of the door leaf, while simultaneously reducing the amount of metal used and saving costs. The structural reinforcement members 2-3 are embedded in the concrete filler, forming a composite structure of "metal skeleton + concrete core layer," allowing the two materials to work together to improve the overall strength of the door leaf.

[0030] A passage 1-1 is provided on the door frame wall 1, and a sealing strip 1-2 is provided around the passage 1-1. When the door assembly is in the closed state, the door assembly contacts the sealing strip 1-2, improving the sealing performance of the protective door when it is closed.

[0031] One side of the door assembly is connected to the door frame wall 1 via a second hinge 4, and a locking mechanism 5 is provided on the door assembly.

[0032] A sealing gasket 7 is provided on the connecting surface of adjacent door leaf units 2; when the door assembly is in the unfolded state, the sealing gasket 7 seals the gap between adjacent door leaf units 2. By providing the sealing gasket 7, the connection sealing between two adjacent door leaf units 2 can be improved, thereby improving the protection level of the entire protective sealing door.

[0033] Furthermore, the pin 6-2 includes a pin body 6-2a, a channel is provided inside the pin body 6-2a, a piston 6-2c and a threaded body 6-2d are provided inside the channel, the threaded body 6-2d is threadedly engaged with the inner wall of the channel; the threaded body 6-2d and the piston 6-2c are connected by a connecting rod 6-2g; a grease storage space 6-2h is provided between the piston 6-2c and the bottom of the channel, the grease storage space 6-2h stores grease; the pin body 6-2a is provided with an overflow hole 6-2b communicating with the grease storage space 6-2h.

[0034] The inner wall of the channel is provided with an internal thread 6-2f, and the threaded body 6-2d is threadedly engaged with the internal thread 6-2f. The grease is in the form of paste at room temperature, and will not flow out of the grease storage space 6-2h unless squeezed by the piston 6-2c. Before inserting pin 6-2 into the hole of pin 6-2, first rotate the threaded body 6-2d to move the piston 6-2c downward. When the piston 6-2c moves downward, it squeezes the grease in the grease storage space 6-2h, causing the grease to flow through the overflow hole 6-2b to the outer surface of the pin body 6-2a. The operator then evenly applies the overflowed grease to the outer surface of pin 6-2. Then, pin 6-2 is inserted into the hole of pin 6-2. Applying grease to the outer surface of pin 6-2 before insertion reduces the friction between pin 6-2 and the inner wall of the hole, allowing for smooth insertion. Furthermore, the grease isolates the pin from external air, preventing rust and thus avoiding the problem of pin 6-2 becoming stuck and unable to be pulled out after prolonged insertion. In this invention, the pin 6-2 has a built-in grease supply mechanism to supply grease without relying on an external grease supply; and the amount of grease stored in the pin 6-2 at one time can be used for multiple grease supplies.

[0035] The threaded body 6-2d is provided with a screwdriver slot 6-2e, which is used to connect with a screwdriver, so that the threaded body 6-2d can be rotated easily by the screwdriver.

[0036] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A folding protective airtight door, characterized in that, It includes a doorframe wall and a door leaf assembly. The door leaf assembly includes several door leaf units, and a first hinge and a bolt mechanism are arranged between adjacent door leaf units; the first hinge and the bolt mechanism are respectively located on both sides of the door leaf unit; the bolt mechanism includes a bolt and a bolt seat, the bolt seats are respectively arranged on two adjacent door leaf units, and bolt holes are arranged on the bolt seats. When the door leaf assembly is in the unfolded state, the bolt is inserted into the bolt seat of the adjacent door leaf unit; when the door leaf assembly is in the folded state, the bolt is pulled out from the bolt seat of the adjacent door leaf unit.

2. The folding protective airtight door according to claim 1, characterized in that, The door leaf unit includes a door leaf outer shell body, and a structural reinforcement member and a concrete filling body are arranged inside the door leaf outer shell body.

3. The folding protective airtight door according to claim 2, characterized in that, The structural reinforcement member is strip-shaped, the structural reinforcement member is arranged along the height direction of the door leaf unit, and the cross-section of the structural reinforcement member is in a "U" shape.

4. The folding protective airtight door according to claim 1, characterized in that, A channel is arranged on the doorframe wall, and a sealing strip is arranged on the periphery of the channel.

5. The folding protective airtight door according to claim 1, characterized in that, One side of the door leaf assembly is connected to the doorframe wall through a second hinge, and a locking mechanism is arranged on the door leaf assembly.

6. The folding protective airtight door according to claim 1, characterized in that, Sealing gaskets are arranged on the connecting surfaces of adjacent door leaf units; when the door leaf assembly is in the unfolded state, the sealing gaskets seal the gaps between adjacent door leaf units.

7. The folding protective airtight door according to claim 1, characterized in that, The bolt includes a bolt body, a pore passage is arranged inside the bolt body, a piston and a threaded body are arranged inside the pore passage, and the threaded body is in threaded fit with the inner wall of the pore passage; the threaded body and the piston are connected by a connecting rod; a grease storage space is arranged between the piston and the bottom of the pore passage, and grease is stored in the grease storage space; an overflow hole communicating with the grease storage space is arranged on the bolt body.

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