Fire door with explosion-proof function

Abstract

This utility model relates to the field of fire door technology and discloses a fire door with explosion-proof function, including a door body and a cylindrical body. Multiple cylindrical bodies are welded and fixed to the inner side of the door body. An inner cavity is formed on the inner side of the cylindrical body. An opening communicating with the interior is provided on the front end of the inner cavity on the door body surface. Multiple vents communicating with the interior of the inner cavity are provided on the rear end of the inner cavity on the door body surface. A connecting rod is provided inside the cylindrical body and can slide through to the rear end of the door body. This utility model's technical solution, by providing multiple inner cavity structures formed by cylindrical bodies inside the door body, which communicate with the outside through openings and vents, allows for the rapid release of explosion pressure by inner and outer sealing plates. Explosive impact pressure can push against the inner sealing plate, compressing a heat-resistant spring and opening it. The outer sealing plate also moves accordingly, releasing the blockage of the openings and vents, thus quickly releasing the explosion pressure, reducing the impact pressure on the door body, thereby making the door body less susceptible to damage and improving its explosion-proof performance.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, specifically a fire door with explosion-proof function. Background Technology

[0002] Fire doors are doors that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance installed in fire compartments, evacuation stairwells, vertical shafts and other similar spaces. They are specifically used in buildings to isolate fire sources and play a huge role in fire protection. In the event of a fire, people can use fire doors to escape.

[0003] Existing fire doors only provide fire protection and pose a risk of explosion during a fire. While fire doors are locked in place by an operable lock and door closer during a fire, the impact of an explosion would directly affect the sealed fire door. This impact, acting on the door's surface, could easily damage the structurally weak fire door, rendering it ineffective for fire and smoke protection. Therefore, we propose a fire door with explosion-proof functionality. Utility Model Content

[0004] The purpose of this utility model is to provide a fire door with explosion-proof function. It has multiple internal cavity structures formed by cylindrical bodies inside the door body, which are connected to the outside through openings and vents. In use, the openings and vents are blocked by inner and outer sealing plates. The explosion impact pressure can push the inner sealing plate to compress the heat-resistant spring and push it open. The outer sealing plate also moves to release the blockage of the openings and vents, which can quickly release the explosion pressure, reduce the impact pressure on the door body, and thus make the door body less likely to be damaged and improve its explosion-proof performance, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fireproof door with explosion-proof function, comprising a door body and a cylindrical body. The cylindrical body is provided with multiple parts and welded and fixed to the inner side of the door body. An inner cavity is formed on the inner side of the cylindrical body. The door body surface at the front end of the inner cavity has an opening communicating with the interior of the inner cavity. The door body surface at the rear end of the inner cavity has multiple air holes communicating with the interior of the inner cavity. A connecting rod is provided inside the cylindrical body and can slide through to the rear end of the door body. An inner sealing plate is fixed at the front end of the connecting rod and placed in the inner cavity. An outer sealing plate is fixed at the rear end of the connecting rod and placed outside the door body. A heat-resistant spring is sleeved on the outer ring of the connecting rod between the inner sealing plate and the inner wall surface of the inner cavity. Under the action of the heat-resistant spring, the inner sealing plate abuts against the inner surface of the door body at the opening, and the outer sealing plate abuts against the outer surface of the door body at the opening.

[0006] By adopting the above technical solutions, when the door achieves fireproof and smokeproof functions, if an explosion occurs during an indoor fire, the impact pressure acting on the door surface will push open the inner sealing plate and quickly release the pressure through the opening, inner cavity and air hole, reducing the impact force on the door, improving its explosion-proof performance and preventing the door from being damaged.

[0007] Optionally, a first heat-resistant rubber is attached and fixed to the inner surface of the outer sealing plate, and the outer sealing plate abuts against the outer surface of the door through the first heat-resistant rubber.

[0008] By adopting the above technical solution, the sealing effect of the outer sealing plate on the through hole can be improved.

[0009] Optionally, a second heat-resistant rubber is attached and fixed to the outer surface of the inner sealing plate, and the inner sealing plate abuts against the inner surface of the door body through the second heat-resistant rubber.

[0010] By adopting the above technical solution, the sealing effect of the inner sealing plate on the opening is improved.

[0011] Optionally, a reinforcing plate is fixedly attached to the inner wall surface of the door body, and a sand layer is filled between the reinforcing plates inside the door body.

[0012] By adopting the above technical solutions, the overall strength of the door is increased, and the door has good heat insulation and fireproof functions.

[0013] Optionally, the side and top side surfaces of the door body are provided with screw grooves, and multiple screw grooves are provided.

[0014] The above technical solution is used to install structures such as hinges and door closers.

[0015] Optionally, a rod opening communicating with the interior cavity is provided on the door surface at the middle position of the outer sealing plate, and the connecting rod can slide through the door body through the rod opening.

[0016] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows: 1. The technical solution of this application has multiple internal cavity structures formed by cylindrical bodies inside the door body. These cavities are connected to the outside through openings and vents. During use, the openings and vents are sealed by inner and outer sealing plates. Only in the event of a fire and explosion, the explosion impact pressure pushes the inner sealing plate, compresses the heat-resistant spring, and pushes it open. The outer sealing plate also moves accordingly to release the seal on the openings and vents, which can quickly release the explosion pressure, reduce the impact pressure on the door body, and thus make the door body less susceptible to damage and improve its explosion-proof performance.

[0017] 2. The technical solution of this application improves the sealing effect on the vent and opening positions by setting a first heat-resistant rubber on the inner surface of the outer sealing plate and a second rubber pad on the outer surface of the inner sealing plate, thereby preventing the spread of flue gas. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the fire door with explosion-proof function according to this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the fire door with explosion-proof function according to this utility model; Figure 3 This is a detailed structural diagram of the cylinder position of the fireproof door with explosion-proof function of this utility model.

[0019] In the diagram: 1. Door body; 11. Reinforcing plate; 12. Sand layer; 13. Threaded groove; 2. Cylinder; 21. Inner cavity; 211. Air hole; 22. Through port; 23. Rod opening; 3. Connecting rod; 31. Outer sealing plate; 311. First heat-resistant rubber; 32. Inner sealing plate; 321. Second heat-resistant rubber; 33. Heat-resistant spring. Detailed Implementation

[0020] Please see Figure 1-3 This utility model provides a technical solution: a fireproof door with explosion-proof function, including a door body 1 and a cylinder 2. The inner wall surface of the door body 1 is fixed with a reinforcing plate 11. The reinforcing plate 11 can be a high-strength steel plate or an alloy plate. The door body 1 is filled with a sand layer 12 between the reinforcing plates 11, which makes the overall strength of the door body 1 higher. The poor thermal conductivity and non-combustible properties of the sand layer 12 give the door body 1 good heat insulation and fireproof performance.

[0021] Additionally, the side and top side surfaces of the door body 1 are provided with screw grooves 13. Multiple screw grooves 13 are provided, which can be used to install hinges or hinges. After the door body 1 is installed inside the door frame, a door closer is installed through the top screw groove 13 to achieve the purpose of automatically closing the door body 1 in case of fire or keeping the door body 1 in a normally closed state. The side of the door body 1 is provided with a groove for installing the lock body.

[0022] The cylinder 2 is provided with multiple parts and welded to the inside of the door 1. The inside of the cylinder 2 forms an inner cavity 21, and the surface of the door 1 at the front end of the inner cavity 21 is provided with an opening 22 that communicates with the inside. The surface of the door 1 at the rear end of the inner cavity 21 is provided with multiple vents 211 that communicate with the inside of the inner cavity 21. When a fire occurs and there is an explosion inside, the impact force is applied to the inside of the door 1. The opening 22, the inner cavity 21 and the vents 211 form a connected channel, which can quickly release the explosion pressure to the other side of the door 1 through the channel, thereby reducing the pressure on the surface of the door 1 and preventing the door 1 from being damaged by the explosion impact pressure.

[0023] The above structural design results in a connecting passage for the door 1 even when no explosion occurs, which is not conducive to preventing the spread of fire or smoke. Therefore, a connecting rod 3 is installed inside the cylinder 2 and can slide through to the rear end of the door 1. The surface of the door 1 at the middle position of the outer sealing plate 31 has a rod opening 23 that communicates with the interior of the inner cavity 21. The connecting rod 3 can slide through the door 1 through the rod opening 23. The front end of the connecting rod 3 is fixed to the inner sealing plate 32 placed in the inner cavity 21, and the rear end of the connecting rod 3 is fixed to the outer sealing plate 31 placed outside the door 1. A heat-resistant spring 33 is fitted around the outer ring of the connecting rod 3 between the inner sealing plate 32 and the inner wall surface of the inner cavity 21. Under the action of the heat-resistant spring 33, the inner sealing plate 32 abuts against the door at the opening 22. The inner surface of the door 1 and the outer sealing plate 31 abut against the outer surface of the door body 1 at the through hole can completely seal the entire passage to prevent smoke leakage. The heat-resistant spring 33 is a stainless steel spring with a heat resistance temperature of up to 300 degrees. Combustible materials cannot be piled around the fire door, so the temperature at the door body 1 will not exceed 300 degrees, ensuring that the spring can be used normally. Only when there is an explosion in the fire, the impact pressure is applied to the inner side of the door body 1. The impact force pushes the inner sealing plate 32 to the rear end and compresses the heat-resistant spring 33, causing the outer sealing plate 31 to also move to the rear end, so that the through hole 22 and the vent 211 are no longer blocked, forming a passage. After the explosion, the heat-resistant spring 33 returns to its original position and can block the through hole 22 and the vent 211 again.

[0024] The inner surface of the outer sealing plate 31 is fitted with a first heat-resistant rubber 311, and the outer sealing plate 31 abuts against the outer surface of the door body 1 through the first heat-resistant rubber 311. The outer surface of the inner sealing plate 32 is fitted with a second heat-resistant rubber 321, and the inner sealing plate 32 abuts against the inner surface of the door body 1 through the second heat-resistant rubber 321. This can improve the sealing effect of the outer sealing plate 31 on the through hole and the sealing effect of the inner sealing plate 32 on the through opening 22.

[0025] In use, hinges and door closers are installed through the pre-drilled grooves 13 on the surface of door body 1, and door body 1 is installed into the door frame through the hinges. A lock body is installed in the grooves pre-drilled on the side of door body 1, so that one side of door body 1 containing the opening 22 faces the interior, while the other side faces the safety passage. The reinforcing plate 11 and sand layer 12 structure in door body 1 increase the overall strength of door body 1, and utilize the poor heat transfer effect and non-combustible properties of sand to achieve fireproofing. When a fire occurs and an explosion occurs inside, the impact force acts on the inner side of door body 1, causing the inner sealing plate 32 to... The heat-resistant spring 33 is pushed to the rear end and compressed, causing the outer sealing plate 31 to move to the rear end as well. This allows the opening 22 and the vent 211 to no longer be blocked, forming a connected channel. This allows the explosion pressure to be quickly released to the other side of the door 1 through the channel, thereby reducing the pressure on the surface of the door 1 and preventing the door 1 from being damaged by the explosion impact pressure. After the explosion ends, under the reset action of the heat-resistant spring 33, the outer sealing plate 31 is once again pressed against the outer surface of the door 1 to block the vent 211, and the inner sealing plate 32 is pressed against the inner surface of the inner body to block the opening 22, achieving the purpose of sealing and preventing the spread of fire smoke.

Claims

1. A fire door with explosion-proof function, comprising a door body (1) and a cylinder (2), characterized in that: The cylinder (2) is provided with multiple and welded to the inner side of the door (1). The inner side of the cylinder (2) forms an inner cavity (21). The surface of the door (1) at the front end of the inner cavity (21) is provided with a through-hole (22) communicating with its interior. The surface of the door (1) at the rear end of the inner cavity (21) is provided with multiple air holes (211) communicating with the interior of the inner cavity (21). The cylinder (2) is provided with a connecting rod (3) which can slide through to the rear end of the door (1). The front end of the connecting rod (3) is fixed with an inner sealing plate (32) placed in the inner cavity (21), and the rear end of the connecting rod (3) is fixed with an outer sealing plate (31) placed outside the door (1). A heat-resistant spring (33) is fitted around the outer ring of the connecting rod (3) between the inner sealing plate (32) and the inner wall surface of the inner cavity (21). Under the action of the heat-resistant spring (33), the inner sealing plate (32) abuts against the inner surface of the door (1) at the opening (22), and the outer sealing plate (31) abuts against the outer surface of the door (1) at the through hole.

2. The fire door with explosion-proof function according to claim 1, characterized in that: The inner surface of the outer sealing plate (31) is fixed with a first heat-resistant rubber (311), and the outer sealing plate (31) abuts against the outer surface of the door body (1) through the first heat-resistant rubber (311).

3. The fire door with explosion-proof function according to claim 1, characterized in that: The outer surface of the inner sealing plate (32) is fixed with a second heat-resistant rubber (321), and the inner sealing plate (32) abuts against the inner surface of the door body (1) through the second heat-resistant rubber (321).

4. The fire door with explosion-proof function according to claim 1, characterized in that: The inner wall surface of the door (1) is fixed with a reinforcing plate (11), and the interior of the door (1) between the reinforcing plates (11) is filled with a sand layer (12).

5. The fire door with explosion-proof function according to claim 1, characterized in that: The side and top side surfaces of the door body (1) are provided with screw grooves (13), and there are multiple screw grooves (13).

6. The fire door with explosion-proof function according to claim 1, characterized in that: The outer sealing plate (31) has a rod opening (23) on the surface of the door body (1) in the middle position, which communicates with the interior cavity (21). The connecting rod (3) can slide through the door body (1) through the rod opening (23).

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