Fire door cover joint plate structure

Abstract

This utility model discloses a fireproof door cover plate structure, including a main cover plate, a secondary cover plate, and a secondary cover plate, which are respectively fixedly connected to the surfaces of a first door panel and a second door panel. The main cover plate extends beyond the edge of the first door panel, and an insert plate is laterally slidably connected inside the first door panel. A sealing groove is formed on the surface of the secondary cover plate facing the main cover plate, and the insert plate is inserted into the inner side of the sealing groove and abuts against the inner wall of the sealing groove. This utility model achieves locking and separation of the cover plate by the cooperation of the insert plate and the sealing groove of the main cover plate and the secondary cover plate. The insert plate is pushed laterally into the sealing groove of the secondary cover plate by a transmission component, so that the insert plate remains stably inserted under high temperature in a fire. Compared with the traditional screw fixing structure, the connection reliability is improved, and the problem of existing cover plates easily loosening and falling off at high temperatures is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, specifically a fire door cover plate structure. Background Technology

[0002] In modern building fire safety systems, fire doors are crucial facilities for preventing the spread of fire and ensuring the safe evacuation of personnel. Their sealing performance and structural integrity directly affect the effectiveness of fire compartmentation. Currently, common fire doors on the market often have obvious gaps at the joints between the door leaf and the frame, and between the door leaves themselves. Therefore, cover plates are needed to conceal these gaps.

[0003] Existing fire door cover plate structures mostly use a single flat plate fixed with screws. Under high-temperature environments, the material is prone to loosening and deformation due to thermal expansion and contraction, leading to exposed gaps and affecting the overall sealing performance of the fire door. This fails to meet the requirements of modern buildings for high reliability and long fire resistance limits for fire doors. Therefore, a new technical solution is proposed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to provide a fire door cover seam structure, which solves the problem mentioned in the background art that the existing fire door cover seam structures mostly use a single flat plate and screw fixing method, which is prone to loosening under high temperature environment due to thermal expansion and contraction of materials, resulting in exposed gaps and affecting the overall sealing performance of the fire door.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fireproof door cover plate structure, comprising a main cover plate, characterized in that: the main cover plate and the secondary cover plate are respectively fixedly connected to the surfaces of a first door panel and a second door panel, wherein the main cover plate extends beyond the edge of the first door panel, and an insert plate is laterally slidably connected inside the first door panel, and a sealing groove is formed on the surface of the secondary cover plate facing the main cover plate, and the insert plate is inserted into the inner side of the sealing groove and fits against the inner wall of the sealing groove.

[0006] In this technical solution, the locking and separation of the cover plate are achieved by the cooperation of the insert plate and sealing groove of the main cover plate and the secondary cover plate. The insert plate is pushed laterally into the sealing groove of the secondary cover plate by the transmission component, so that the insert plate remains in a stable insertion state under the high temperature of the fire. Compared with the traditional screw fixing structure, the connection reliability is improved, and the problem of existing cover plates being easy to loosen and fall off at high temperatures is effectively solved.

[0007] Preferably, a cam is rotatably connected to the inner surface of the main cover plate, and a constraint groove is provided at the edge of the insert plate at the horizontal position of the cam. The cam is fixedly connected to the lever handle.

[0008] Preferably, a limiting groove is provided at one end of the lever handle, and a limiting frame is fixedly connected to the side wall of the main cover plate corresponding to the horizontal height of the limiting groove. A locking block is slidably connected to the inner side of the limiting frame, and a compression spring is fixedly connected between the locking block and the inner wall of the limiting frame.

[0009] Preferably, a plurality of sliding rods are fixedly connected to the inner surface of the insert plate on the main cover plate. One end of each sliding rod passes through the surface of the main cover plate and is connected to the main cover plate. A return spring is sleeved on the surface of the sliding rod on the inner side of the main cover plate. The left and right ends of the return spring are fixedly connected to the inner wall of the main cover plate and the insert plate, respectively.

[0010] Preferably, an expansion strip is fixedly connected to the inner sidewall of the sealing groove, and an elastic buffer strip is fixedly connected to one end of the insert plate that is inserted into the sealing groove.

[0011] Preferably, a heat insulation layer is fixedly connected to the side of the main cover plate facing the first door panel, and the heat insulation layer is made of ceramic fiber.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model achieves locking and separation of the cover plate by the cooperation of the insert plate and sealing groove of the main cover plate and the secondary cover plate. The transmission component pushes the insert plate to be inserted laterally into the sealing groove of the secondary cover plate, so that the insert plate remains in a stable insertion state under the high temperature of fire. Compared with the traditional screw fixing structure, the connection reliability is improved, and the problem of existing cover plates being easy to loosen and fall off at high temperatures is effectively solved.

[0013] 2. This utility model provides an elastic buffer strip at one end of the insert plate and an expansion strip inside the sealing groove. After the insert plate is inserted, the elastic buffer strip and the expansion strip expand due to heat, filling the gap between the insert plate and the sealing groove and improving the sealing performance. Attached Figure Description

[0014] 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 an overall view of the present invention; Figure 2 This is a schematic diagram of the interior of the main cover plate of this utility model; Figure 3 This is a cross-sectional schematic diagram of the main cover plate and the secondary cover plate of this utility model.

[0015] In the diagram: 1. Door panel 1; 101. Door panel 2; 2. Main cover plate; 201. Insulation layer; 3. Secondary cover plate; 301. Sealing groove; 4. Insert plate; 401. Return spring; 402. Slide rod; 5. Cam; 501. Constraint groove; 6. Lever handle; 601. Limiting groove; 7. Limiting frame; 8. Locking block; 801. Compression spring; 9. Elastic buffer strip; 10. Expansion strip. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description will further elaborate on them in conjunction with specific embodiments.

[0017] A fire door cover seam panel structure, see Figures 1 to 3 It includes a main cover plate 2, and a secondary cover plate 3, which are respectively fixedly connected to the surfaces of the first door panel 1 and the second door panel 101. The main cover plate 2 extends out of the edge of the first door panel 1. An insert plate 4 is slidably connected to the inside of the first door panel 1. A sealing groove 301 is opened on the surface of the secondary cover plate 3 facing the main cover plate 2. The insert plate 4 is inserted into the inner side of the sealing groove 301 and fits against the inner side wall of the sealing groove 301. An expansion strip 10 is fixedly connected to the inner side wall of the sealing groove 301. An elastic buffer strip 9 is fixedly connected to one end of the insert plate 4 inserted into the sealing groove 301.

[0018] Specifically, a cam 5 is rotatably connected to the inner surface of the main cover plate 2. A constraint groove 501 is provided at the edge of the insert plate 4 at the horizontal position of the cam 5. The cam 5 is fixedly connected to the lever handle 6. When the insert plate 4 needs to extend, only the lever handle 6 needs to be rotated. During the rotation of the lever handle 6, the cam 5 in the main cover plate 2 is rotated. When the cam 5 rotates, it gradually enters the constraint groove 501 and pushes out the insert plate 4. It should be noted that the rotation of the cam 5 has a large damping effect, so it can prevent it from rotating freely and ensure the stability of the insert plate 4. A high-temperature resistant sealing strip is provided at the position where the insert plate 4 extends out of the main cover plate 2 to prevent flue gas from entering the main cover plate 2.

[0019] Furthermore, such as Figure 2As shown, several sliding rods 402 are fixedly connected to the inner surface of the insert plate 4 on the main cover plate 2. One end of the sliding rod 402 passes through the surface of the main cover plate 2 and is connected to the main cover plate 2. A return spring 401 is sleeved on the surface of the sliding rod 402 on the inner side of the main cover plate 2. The left and right ends of the return spring 401 are fixedly connected to the inner wall of the main cover plate 2 and the insert plate 4, respectively. When the insert plate 4 is pushed, the return spring 401 will be in a stretched state. When the insert plate 4 needs to be retracted, the cam 5 is rotated normally to disengage it from the constraint groove 501. At this time, the insert plate 4 will retract under the pull of the return spring 401. The function of the sliding rod 402 is to support the return spring 401 and prevent the return spring 401 from falling and deforming due to its own weight. When the insert plate 4 is retracted, one end of the sliding rod 402 will extend out of the main cover plate 2.

[0020] It is worth noting that, such as Figure 2 and Figure 3 As shown, a limiting groove 601 is provided at one end of the lever handle 6. A limiting frame 7 is fixedly connected to the side wall of the main cover plate 2 corresponding to the horizontal height of the limiting groove 601. A locking block 8 is slidably connected to the inner side of the limiting frame 7. A compression spring 801 is fixedly connected between the locking block 8 and the inner wall of the limiting frame 7. After the lever handle 6 is rotated to the horizontal position, the locking block 8 will slide into the limiting groove 601, which will limit the lever handle 6 and prevent it from rotating temporarily. When rotation is required, the locking block 8 only needs to be slid out to the outside of the limiting groove 601, and then the lever handle 6 can be rotated normally to complete the position adjustment of the insert plate 4.

[0021] It is worth noting that, such as Figure 1 As shown, a heat insulation layer 201 is fixedly connected to the side of the main cover plate 2 facing the first door panel 1. The heat insulation layer 201 is made of ceramic fiber. The ceramic fiber is mainly made of raw materials such as alumina and silicon oxide through high-temperature melting and blowing. It has the characteristics of low thermal conductivity and high fire resistance, and can effectively isolate the heat transmitted from the gap between the first door panel 1 and the second door panel 101.

[0022] The expansion strip 10, made of graphite-based expandable material, comes into contact with the insert plate 4 when the door is closed, after the insert plate 4 is inserted into the sealing groove 301 of the sub-cover plate 3. During a fire, the expansion strip 10 expands due to heat, filling the gap between the door seal groove 301 and the insert plate 4, thus improving the seal. The elastic buffer strip 9, made of high-temperature resistant rubber or silicone rubber, utilizes its elastic deformation capability to undergo slight deformation under high temperatures, working in conjunction with the expansion strip 10 to fill gaps and further enhance the sealing effect.

[0023] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

Claims

1. A fireproof door cover plate structure, comprising a main cover plate (2), characterized in that: The main cover plate (2) and the secondary cover plate (3) are respectively fixedly connected to the surfaces of the first door panel (1) and the second door panel (101). The main cover plate (2) extends out of the edge of the first door panel (1). The first door panel (1) is laterally slidably connected with an insert plate (4). The secondary cover plate (3) has a sealing groove (301) on the surface facing the main cover plate (2). The insert plate (4) is inserted into the inner side of the sealing groove (301) and fits against the inner wall of the sealing groove (301).

2. The fireproof door cover panel structure according to claim 1, characterized in that: The inner surface of the main cover plate (2) is rotatably connected to a cam (5), and a constraint groove (501) is provided at the edge of the insert plate (4) at the horizontal position of the cam (5). The cam (5) is fixedly connected to the lever handle (6).

3. The fireproof door cover plate structure according to claim 2, characterized in that: One end of the lever handle (6) has a limiting groove (601), and the side wall of the main cover plate (2) corresponding to the horizontal height of the limiting groove (601) is fixedly connected to a limiting frame (7). The inner side of the limiting frame (7) is slidably connected to a locking block (8), and a compression spring (801) is fixedly connected between the locking block (8) and the inner wall of the limiting frame (7).

4. The fireproof door cover panel structure according to claim 1, characterized in that: The insert plate (4) is fixedly connected to a number of sliding rods (402) on the inner side of the main cover plate (2). One end of the sliding rod (402) passes through the surface of the main cover plate (2) and is connected to the main cover plate (2). A return spring (401) is sleeved on the surface of the sliding rod (402) on the inner side of the main cover plate (2). The left and right ends of the return spring (401) are fixedly connected to the inner wall of the main cover plate (2) and the insert plate (4) respectively.

5. The fireproof door cover plate structure according to claim 1, characterized in that: An expansion strip (10) is fixedly connected to the inner wall of the sealing groove (301), and an elastic buffer strip (9) is fixedly connected to one end of the insert plate (4) inserted into the sealing groove (301).

6. The fireproof door cover plate structure according to claim 1, characterized in that: The main cover plate (2) is fixedly connected to a heat insulation layer (201) on the side facing the first door panel (1), and the heat insulation layer (201) is made of ceramic fiber.

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