Novel flame-retardant and high-temperature-resistant civil air defense door

Abstract

The utility model provides a novel flame-retardant and high-temperature-resistant civil air defense door, which belongs to the technical field of civil air defense engineering protection equipment and comprises a door frame, a composite door leaf, a rotating handle and a handle. The composite door leaf is composed of an anti-impact layer, a support, a heat-insulation flame-retardant layer and an inner layer, the anti-impact layer is made of a 2mm cold-rolled steel sheet, a first sealing groove is formed in the edge of the inner side of the door frame, and a second sealing groove is formed in the edge of the inner side of the door frame and located on the side face of the first sealing groove. The surface of the impact-resistant layer is coated with a high-temperature-resistant ceramic coating, so that the temperature is not easy to rise quickly in case of fire, the heat-insulating and flame-retardant layer is formed by composite filling of a 50-80mm ceramic fiber board and expanded graphite, the ceramic fiber board can provide a heat-insulating function, and the expanded graphite expands in case of high temperature to form a compact carbonized layer to isolate oxygen, so that the fire is not easy to break out, and fire spreading is prevented; and the structural stability and the protection performance in a high-temperature environment are realized.

Description

Technical Field

[0001] This utility model relates to the field of civil defense engineering protective equipment technology, and in particular to a new type of flame-retardant and high-temperature resistant civil defense door. Background Technology

[0002] Civil defense doors are the doors at the entrances and exits of civil defense projects. They are protective doors used to enter areas with protective measures in the event of natural disasters such as war or earthquakes. Civil defense doors are protective equipment and are usually made of concrete or steel.

[0003] Traditional air-raid shelter doors are mostly made of steel or concrete, which, while providing some protection, have the following problems in high-temperature environments:

[0004] Ordinary steel has high thermal conductivity and is prone to softening and deformation at high temperatures. The high-temperature heat is quickly conducted to the back of the door, threatening internal safety and resulting in poor heat insulation. Concrete expands and contracts with temperature, and is prone to cracking after being heated, affecting airtightness and causing insufficient flame retardancy. Furthermore, at high temperatures, the sealing strip inside the door frame melts and deforms, resulting in reduced airtightness and failure of the air-raid shelter door's seal.

[0005] Therefore, this application provides a novel flame-retardant and high-temperature resistant air-raid shelter door to meet the requirements. Utility Model Content

[0006] The purpose of this utility model is to solve the problems existing in the above-mentioned background technology and to propose a new type of flame-retardant and high-temperature resistant air defense door.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A novel flame-retardant and high-temperature resistant air-raid shelter door includes: a door frame, a composite door leaf, a rotary handle, and a handle; the door frame has a first sealing groove on its inner edge and a second sealing groove on the side of the first sealing groove on its inner edge; the composite door leaf is installed on the inner side of the door frame via hinges; the composite door leaf consists of an impact-resistant layer, a support frame, a heat-insulating and flame-retardant layer, and an inner layer; a rotary handle is installed on the surface of the impact-resistant layer of the composite door leaf, and a handle is installed on the surface of the inner layer of the composite door leaf.

[0009] Preferably, the composite door leaf consists of an impact-resistant layer, a support frame, a heat-insulating and flame-retardant layer, and an inner layer from the outside to the inside. The support frame is installed on the back edge of the impact-resistant layer, and the heat-insulating and flame-retardant layer and the inner layer are fixed to the impact-resistant layer by the support frame.

[0010] Preferably, the impact-resistant layer is made of 2mm cold-rolled steel plate, and the surface of the impact-resistant layer is coated with a high-temperature resistant ceramic coating.

[0011] Preferably, the heat-insulating and flame-retardant layer is composed of a 50-80mm ceramic fiber board and expanded graphite composite filler.

[0012] Preferably, the inner layer is made of calcium silicate board with a thickness of 30 mm.

[0013] Preferably, both the first sealing groove and the second sealing groove surround the entire inner edge of the door frame, and the first sealing groove and the second sealing groove are located on the contact surface between the door frame and the composite door leaf.

[0014] Preferably, a high-temperature resistant silicone rubber sealing strip is embedded inside the first sealing groove, and an expanded graphite sealing strip is embedded inside the second sealing groove.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects:

[0016] In the above scheme, the composite door leaf consists of an impact-resistant layer, a support frame, a heat-insulating and flame-retardant layer, and an inner layer. The impact-resistant layer is made of 2mm cold-rolled steel plate, and the surface of the impact-resistant layer is coated with a high-temperature resistant ceramic coating, which makes it difficult to heat up quickly when exposed to fire. The heat-insulating and flame-retardant layer is made of 50-80mm ceramic fiber board and expanded graphite composite filling. The ceramic fiber board can provide heat insulation function, and the expanded graphite expands at high temperature to form a dense carbonized layer, which isolates oxygen, making it difficult to ignite and preventing the spread of fire. Through the multi-layer composite structure design, structural stability and protective performance in high-temperature environments are achieved.

[0017] In the above solution, a first sealing groove and a second sealing groove are provided on the contact surface between the door frame and the composite door leaf. When the composite door leaf is closed inside the door frame, the first sealing groove and the second sealing groove are located within the door gap. A high-temperature resistant silicone rubber sealing strip is embedded inside the first sealing groove, and an expanded graphite sealing strip is embedded inside the second sealing groove. At high temperatures, the door frame heats up, and the high-temperature resistant silicone rubber sealing strip in the first sealing groove is not easily deformed or melted by heat, thus ensuring the airtightness of the blast door. The expanded graphite sealing strip inside the second sealing groove expands when heated, which can fill the gap between the door frame and the composite door leaf and enhance the airtightness. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the door frame structure of this utility model;

[0021] Figure 3This is a schematic diagram of the specific connection structure of the door leaf of this utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the intermediate layer of this utility model;

[0023] Figure 5 For the present utility model Figure 2 Enlarged structural diagram at point A.

[0024] [Figure Labels]

[0025] 1-Door frame; 2-Composite door leaf; 3-Turn handle; 4-Handle; 101-First sealing groove; 102-Second sealing groove; 201-Impact-resistant layer; 202-Bracket; 203-Heat-insulating and flame-retardant layer; 204-Inner layer.

[0026] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0027] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The present invention discloses a novel flame-retardant and high-temperature resistant air-raid shelter door, which includes: a door frame 1, a composite door leaf 2, a rotary handle 3, and a handle 4. The door frame 1 has a first sealing groove 101 on its inner edge and a second sealing groove 102 on the side of the first sealing groove 101 on its inner edge. The composite door leaf 2 is installed on the inner side of the door frame 1 by a hinge. The composite door leaf 2 is composed of an impact-resistant layer 201, a bracket 202, a heat-insulating and flame-retardant layer 203, and an inner layer 204. The rotary handle 3 is installed on the surface of the impact-resistant layer 201 of the composite door leaf 2, and the handle 4 is installed on the surface of the inner layer 204 of the composite door leaf 2.

[0030] In this embodiment, the composite door leaf 2 consists of an impact-resistant layer 201, a bracket 202, a heat-insulating and flame-retardant layer 203, and an inner layer 204 from the outside to the inside. The bracket 202 is installed on the back edge of the impact-resistant layer 201, and the heat-insulating and flame-retardant layer 203 and the inner layer 204 are fixed to the impact-resistant layer 201 by the bracket 202.

[0031] In this embodiment, the impact-resistant layer 201 is made of 2mm cold-rolled steel plate, and the surface of the impact-resistant layer 201 is coated with a high-temperature resistant ceramic coating, so that it is not easy to heat up quickly when exposed to fire.

[0032] In this embodiment, the heat-insulating and flame-retardant layer 203 is composed of a 50-80mm ceramic fiber board and expanded graphite composite filling. The ceramic fiber board can provide heat insulation function, and the expanded graphite expands at high temperature to form a dense carbonized layer, which isolates oxygen, making it difficult to ignite and preventing the spread of fire.

[0033] In this embodiment, the inner layer 204 is made of calcium silicate board with a thickness of 30mm. Calcium silicate board is a new type of building material that is both fireproof and waterproof and moisture-proof. It can be fireproof and flame-retardant, and its fire resistance reaches the non-combustible A1 level.

[0034] In this embodiment, the first sealing groove 101 and the second sealing groove 102 both surround the inner edge of the entire door frame 1, and the first sealing groove 101 and the second sealing groove 102 are disposed on the contact surface between the door frame 1 and the composite door leaf 2, so that when the composite door leaf 2 is closed inside the door frame 1, the first sealing groove 101 and the second sealing groove 102 are located inside the door gap.

[0035] In this embodiment, a high-temperature resistant silicone rubber sealing strip is embedded inside the first sealing groove 101, and an expanded graphite sealing strip is embedded inside the second sealing groove 102. When the door frame 1 is heated at high temperature, the high-temperature resistant silicone rubber sealing strip in the first sealing groove 101 is not easily deformed or melted by heat, which can ensure the sealing performance of the air-raid shelter door. The expanded graphite sealing strip inside the second sealing groove 102 expands when heated, which can fill the gap between the door frame 1 and the composite door leaf 2 and enhance the airtightness.

[0036] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel flame-retardant and high-temperature resistant air-raid shelter door, characterized in that, include: A door frame (1), a composite door leaf (2), a turn handle (3), and a handle (4); the door frame (1) has a first sealing groove (101) on its inner edge and a second sealing groove (102) on the side of the first sealing groove (101) on its inner edge. The composite door leaf (2) is installed on the inner side of the door frame (1) by a hinge. The composite door leaf (2) is composed of an impact-resistant layer (201), a bracket (202), a heat-insulating and flame-retardant layer (203), and an inner layer (204). A turn handle (3) is installed on the surface of the impact-resistant layer (201) of the composite door leaf (2), and a handle (4) is installed on the surface of the inner layer (204) of the composite door leaf (2).

2. The novel flame-retardant and high-temperature resistant air-raid shelter door according to claim 1, characterized in that: The composite door leaf (2) consists of an impact-resistant layer (201), a bracket (202), a heat-insulating and flame-retardant layer (203), and an inner layer (204) from the outside to the inside. The bracket (202) is installed on the back edge of the impact-resistant layer (201). The heat-insulating and flame-retardant layer (203) and the inner layer (204) are fixed to the impact-resistant layer (201) through the bracket (202).

3. The novel flame-retardant and high-temperature resistant air-raid shelter door according to claim 1, characterized in that: The impact-resistant layer (201) is made of 2mm cold-rolled steel plate, and the surface of the impact-resistant layer (201) is coated with a high-temperature resistant ceramic coating.

4. The novel flame-retardant and high-temperature resistant air-raid shelter door according to claim 1, characterized in that: The heat-insulating and flame-retardant layer (203) is composed of 50-80mm ceramic fiber board and expanded graphite composite filling.

5. The novel flame-retardant and high-temperature resistant air-raid shelter door according to claim 1, characterized in that: The inner layer (204) is made of calcium silicate board with a thickness of 30 mm.

6. The novel flame-retardant and high-temperature resistant air-raid shelter door according to claim 1, characterized in that: The first sealing groove (101) and the second sealing groove (102) both surround the inner edge of the entire door frame (1), and the first sealing groove (101) and the second sealing groove (102) are located on the contact surface between the door frame (1) and the composite door leaf (2).

7. The novel flame-retardant and high-temperature resistant air-raid shelter door according to claim 1, characterized in that: The first sealing groove (101) is embedded with a high-temperature resistant silicone rubber sealing strip, and the second sealing groove (102) is embedded with an expanded graphite sealing strip.

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