Anti-deformation steel fireproof door

Abstract

This utility model discloses a deformation-resistant steel fire door, comprising a steel fire door body, a front panel, a rear panel, and a heat insulation shell. The front and rear panels are arranged in parallel. A positioning groove is provided on the inner side of the rear panel. The heat insulation shell is disposed inside the positioning groove, and its opening is bent outward to form a flange extending into a buffer space and fitted with a sealing frame. The front panel has multiple countersunk holes, and screw holes are provided on the flange and the rear panel directly opposite the countersunk holes. Buffer bolts for fixing the front and rear panels together are threaded into the corresponding screw holes and countersunk holes. This utility model has a simple structure. The steel fire door consists of a front panel, a rear panel, and a heat insulation shell. The heat insulation shell reduces heat transfer, greatly reducing the probability of the front panel deforming due to high temperatures. Furthermore, the front and rear panels are replaceable; if any one panel deforms, only the damaged panel can be replaced, avoiding the need for complete replacement and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, specifically to a deformation-resistant steel fire door. Background Technology

[0002] Steel fire doors are a common type of fire-resistant partition, mainly used in areas of buildings that require fire protection, such as stairwells, elevator shafts, machine rooms, and warehouses.

[0003] However, the structure of limited steel fire doors is simple and lacks a buffer structure. External impacts can cause mechanical damage to the steel fire doors, leading to local deformation and affecting their fire resistance. Furthermore, in the event of a fire, the fire-facing side will be in direct contact with the flames, and the high temperature can cause the steel fire door to deform. Once deformed, the entire steel fire door must be replaced, increasing costs. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a deformation-resistant steel fire door, which is composed of a front panel, a rear panel and a heat insulation shell, thereby increasing the heat insulation effect in the middle and having a buffer effect between the front panel and the rear panel, so as to solve the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: a deformation-resistant steel fire door, comprising a steel fire door body, the steel fire door body comprising a front plate, a rear plate and a heat insulation shell, the front plate and the rear plate being arranged in parallel, forming a buffer space between the front plate and the rear plate, a positioning groove being provided on the inner side of the rear plate, the heat insulation shell being disposed inside the positioning groove, the opening of the heat insulation shell being bent outward to form a flange, the flange extending into the buffer space and being fitted with a sealing frame, the front plate being provided with multiple countersunk holes, the flange and the rear plate being provided with screw holes directly opposite the countersunk holes, and buffer bolts for fixing the front plate and the rear plate together being threadedly connected in the corresponding screw holes and countersunk holes.

[0006] As a preferred technical solution, each buffer bolt includes a front section, a rear section, a shaft, and a positioning block. The front section is threaded into a countersunk hole, and the rear section is threaded into a screw hole. The rear section is provided with a positioning cavity inside. The end of the positioning cavity facing the front section is provided with a shaft hole. The positioning block is set inside the positioning cavity. One end of the shaft is installed on the positioning block, and the other end extends through the shaft hole to the outside and is fixedly connected to the front section.

[0007] As a preferred technical solution, both the positioning block and the positioning cavity have polygonal cross-sections. The positioning cavity is equipped with a compression spring, with one end of the compression spring installed on the inner wall of the positioning cavity and the other end installed on the positioning block.

[0008] As a preferred technical solution, a buffer gap is formed between the front end and the back end, which is set opposite to the buffer space.

[0009] As a preferred technical solution, the heat insulation shell is made of aluminum silicate fiber.

[0010] As a preferred technical solution, the sealing frame is made of silicone rubber material, and flame retardants are added inside the silicone rubber.

[0011] As a preferred technical solution, a positioning part protrudes from the inner side of the front panel, the positioning part is inserted into the positioning groove, and is set in contact with the heat insulation shell.

[0012] The beneficial effects of this utility model are as follows: This utility model has a simple structure. The steel fire door is composed of a front panel, a rear panel, and a heat insulation shell. After the rear panel comes into direct contact with the flame, the front panel serves as the unexposed surface. The heat insulation shell reduces heat transfer, greatly reducing the probability of the front panel deforming due to high temperature. Furthermore, the rear panel and the front panel can be replaced. If any one panel deforms, only the damaged panel can be replaced, avoiding the need to replace the entire panel and reducing costs. At the same time, the front panel and the rear panel have a buffer function, which reduces the probability of deformation when subjected to external impact. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a side view of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of this utility model after removing the sealing frame and the heat insulation shell;

[0017] Figure 4 This is a cross-sectional view of the present invention.

[0018] The components are: 1. Front plate; 2. Rear plate; 3. Sealing frame; 4. Countersunk hole; 5. Buffer bolt; 6. Front section; 7. Rear section; 8. Shaft; 9. Compression spring; 10. Heat insulation shell; 11. Flanged edge; 12. Positioning part. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses a deformation-resistant steel fire door, including a steel fire door body. The steel fire door body includes a front plate 1, a rear plate 2, and a heat insulation shell 10. The front plate 1 and the rear plate 2 are arranged in parallel, forming a buffer space between them. A positioning groove is provided on the inner side of the rear plate 2. The heat insulation shell 10 is disposed inside the positioning groove. The opening of the heat insulation shell 10 is bent outward to form a flange 11. The flange 11 extends into the buffer space and is fitted with a sealing frame 3. The front plate 1 is provided with multiple countersunk holes 4. Screw holes are provided on the flange 11 and the rear plate 2 opposite to the countersunk holes 4. Buffer bolts 5 that fix the front plate 1 and the rear plate 2 together are threaded into the corresponding screw holes and countersunk holes 4.

[0023] In this embodiment, each buffer bolt 5 includes a front section 6, a rear section 7, a shaft 8, and a positioning block. The front section 6 is threaded into the countersunk hole 4, and the rear section 7 is threaded into the screw hole. The rear section 7 is provided with a positioning cavity inside. The end of the positioning cavity facing the front section 6 is provided with a shaft hole. The positioning block is provided inside the positioning cavity. One end of the shaft 8 is installed on the positioning block, and the other end extends through the shaft hole to the outside and is fixedly connected to the front section 6.

[0024] In this embodiment, both the positioning block and the positioning cavity have polygonal cross-sections. The positioning cavity is equipped with a compression spring 9. One end of the compression spring 9 is installed on the inner wall of the positioning cavity, and the other end is installed on the positioning block. The polygonal structure allows the front section to rotate smoothly and the rear section to rotate smoothly, so as to complete the connection and fixation between the front plate and the rear plate.

[0025] In this embodiment, a buffer gap is formed between the front section 6 and the rear section, which is opposite to the buffer space, so that the rear section and the front section can move inward along the shaft to achieve a buffering effect.

[0026] In this embodiment, the heat insulation shell 10 is made of aluminum silicate fiber. The long-term service temperature of aluminum silicate fiber can reach 1000℃~1260℃, and the high-purity type can even reach 1400℃. It also has good heat insulation performance, so it can better insulate heat and be used in fire doors.

[0027] In this embodiment, the sealing frame 3 is made of silicone rubber material, and flame retardant is added inside the silicone rubber. The sealing frame can seal the buffer space, preventing external impurities and open flames from directly contacting the internal heat insulation shell.

[0028] In this embodiment, a positioning part 12 protrudes from the inner side of the front plate 1. The positioning part 12 is inserted into the positioning groove and is in contact with the heat insulation shell 10. The positioning part and the positioning groove can position the front plate and the rear plate, so that the rear plate can only move back and forth along the positioning part, which increases stability.

[0029] During installation, the buffer bolt can be threaded into the countersunk hole and the screw hole. Because the buffer bolt is broken in the middle to form a rear section and a front section, and a buffer gap is formed between the rear section and the front section, when the front section rotates, it can drive the rear section through the shaft and the positioning block, so that the rear section can be smoothly threaded into the screw hole. The buffer gap and buffer space can provide a buffer function between the front plate and the rear plate. When the rear plate is impacted, the rear plate can move towards the front section along the positioning part and the shaft. During the movement, it can compress the spring. The compression spring can play a buffering role, which greatly reduces the probability of damage.

[0030] Steel fire doors consist of a front panel, a rear panel, and a heat insulation shell. The rear panel faces the interior, while the front panel faces the safety staircase. After the rear panel comes into direct contact with the flame, the front panel acts as the unexposed surface. The heat insulation shell reduces heat transfer, greatly reducing the probability of the front panel deforming due to high temperatures. Furthermore, the front and rear panels are replaceable. If either panel deforms, only the damaged panel can be replaced, avoiding the need to replace the entire panel and reducing costs.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A steel fire door resistant to deformation, characterized in that: The fire door includes a steel fire door body, which includes a front plate (1), a rear plate (2) and a heat insulation shell (10). The front plate (1) and the rear plate (2) are arranged in parallel, and a buffer space is formed between the front plate (1) and the rear plate (2). A positioning groove is provided on the inner side of the rear plate (2). The heat insulation shell (10) is located inside the positioning groove. The opening of the heat insulation shell (10) is bent outward to form a flange (11). The flange (11) extends into the buffer space and is equipped with a sealing frame (3). The front plate (1) is provided with multiple countersunk holes (4). The flange (11) and the rear plate (2) are provided with screw holes at the countersunk holes (4). Buffer bolts (5) that fix the front plate (1) and the rear plate (2) together are threaded into the corresponding screw holes and countersunk holes (4).

2. The steel fire door of claim 1, wherein: Each buffer bolt (5) includes a front section (6), a rear section (7), a shaft (8), and a positioning block. The front section (6) is threaded into the countersunk hole (4), and the rear section (7) is threaded into the screw hole. The rear section (7) is provided with a positioning cavity inside. The end of the positioning cavity facing the front section (6) is provided with a shaft hole. The positioning block is provided inside the positioning cavity. One end of the shaft (8) is installed on the positioning block, and the other end extends through the shaft hole to the outside and is fixedly connected to the front section (6).

3. The steel fire door of claim 2, wherein: Both the positioning block and the positioning cavity have polygonal cross-sections. The positioning cavity is equipped with a compression spring (9). One end of the compression spring (9) is installed on the inner wall of the positioning cavity, and the other end is installed on the positioning block.

4. The warp-resistant steel fire door of claim 2, wherein: A buffer gap is formed between the front section (6) and the rear section, which is set opposite to the buffer space.

5. The warp-resistant steel fire door of claim 1, wherein: The heat insulation shell (10) is made of aluminum silicate fiber.

6. The warp-resistant steel fire door of claim 1, wherein: The sealing frame (3) is made of silicone rubber material, and flame retardant is added inside the silicone rubber.

7. The warp-resistant steel fire door of claim 1, wherein: A positioning part (12) protrudes from the inner side of the front panel (1), and the positioning part (12) is inserted into the positioning groove and is in contact with the heat insulation shell (10).

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