Steel folding type smoke-proof and fire-proof door
By introducing dual airbag smoke-proof seals, U-shaped channel steel and expansion sealing strips into the fire door, combined with the embedded slots and V-shaped seals of the door frame and door leaf, the problem of insufficient smoke-proof performance at low temperatures in the fire door is solved, and the smoke sealing and fire-proof performance are improved.
Patent Information
- Application Number
- CN202421579089.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-04
AI Technical Summary
Existing fire doors have insufficient smoke resistance at medium and low temperatures. Normally closed fire doors are prone to become normally open, resulting in the failure of fire protection function. The folding fire doors do not have smoke sealing performance after closing.
A steel folding fire door is designed, using dual airbag smoke-proof seals, U-shaped channel steel and fire-proof expansion seals, combined with the embedded slots and V-shaped seals of the door frame and the door leaf to ensure smoke sealing at medium and low temperatures and avoid collision interference from the door leaf.
It realizes the smoke sealing effect of the fire door at medium and low temperatures, meets the requirements of GB 55037-2022 building fire protection specifications, ensures that the fire door does not leak smoke after closing, and has excellent fire and smoke resistance.
Smart Images
Figure CN223151935U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of doors, in particular to a steel folding smoke-proof and fire-proof door. Background Art
[0002] Fire safety doors are widely used in important public buildings such as high-rise buildings, shopping malls, hotels, and entertainment venues. As an extremely important part of building fire protection facilities, the product quality is quite important. According to the analysis of fire reports, the vast majority of deaths in fires are caused by smoke. The existing fire door products basically consider their fire resistance performance, and the smoke-proof performance design is not perfect enough, with fatal defects in the smoke-proof performance at medium and low temperatures; especially the folding fire doors do not meet the requirement of smoke tightness after closing, and the most widely used are normally closed fire doors. Due to the lack of proper use and supervision, the normally closed fire doors have become normally open fire doors. When a fire occurs, the door leaves cannot be closed, resulting in the complete failure of the fire protection function at this part. Therefore, the traditional fire safety doors urgently need further improvement. Content of the Utility Model
[0003] The purpose of the utility model is to solve the defects existing in the prior art, and to propose a steel folding smoke-proof and fire-proof door with reasonable structure, good fire resistance and smoke-proof performance.
[0004] To solve the above technical problems, the utility model provides the following technical solutions:
[0005] A steel folding smoke-proof and fire-proof door includes a door frame, door leaves, fire hinges and fire bolts. The door leaves include at least two door leaf units. Adjacent two door leaf units are foldably connected through fire hinges, and an opening and closing cavity is formed between adjacent two door leaf units. A double-airbag smoke-proof seal is arranged in the opening and closing cavity. A U-shaped steel channel is arranged on the joint of the door leaf unit facing away from the opening and closing cavity. A fire expansion seal strip is arranged on one side of the U-shaped steel channel facing the opening and closing cavity. A positioning groove for installing the fire expansion seal strip is concavely arranged on one side of the opening and closing cavity close to the U-shaped steel channel.
[0006] Preferably, the double-airbag smoke-proof seal includes an L-shaped sealing part and airbag parts arranged at both ends of the sealing part. The L-shaped sealing part is attached to the opening of the opening and closing cavity.
[0007] Preferably, a card slot is arranged on one side of the door frame, and an airbag-type fire and smoke-proof seal is embedded in the card slot. The airbag-type fire and smoke-proof seal includes an embedded clamping part matched with the card slot and a spherical airbag part attached to the door leaf.
[0008] Preferably, an L-shaped sealing baffle is welded on one side of the door leaf, and a V-shaped seal is arranged at the joint between the L-shaped sealing baffle and the door frame.
[0009] Preferably, the door leaf unit includes an upper door leaf panel, a magnesium oxychloride fireproof board, a fireproof door core board, and a lower door leaf panel, which are arranged in sequence from top to bottom. A U-shaped skeleton is arranged in the fireproof door core board, and both the upper door leaf panel and the lower door leaf panel are cold-rolled from galvanized steel sheets.
[0010] Preferably, a fireproof lock is arranged on the door leaf, and adjacent two door leaf units are locked by fireproof bolts.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0012] In this steel folding smoke-proof and fire-proof door, by arranging an L-shaped double-airbag smoke-proof seal in the opening and closing cavity between the door leaf units, the double-airbag smoke-proof seal meets the smoke-proof requirements at medium and low temperatures, realizes the requirement of smoke tightness between the door leaves after the folding fire-proof door is closed, and ensures the fire-proof and smoke-proof effects.
[0013] In this steel folding smoke-proof and fire-proof door, through the combined setting of U-shaped steel channels and fireproof expansion sealing strips, it can ensure that there is no collision interference when the door leaf units are folded, and at the same time, it has both fire-proof and smoke-proof performances.
[0014] In this steel folding smoke-proof and fire-proof door, at the joint between the door frame and the door leaf, a double-seal structure is adopted. Not only is an embedded card slot structure arranged on the door frame and a smoke-proof seal ring is arranged at the card slot, but also a V-shaped seal is arranged at the joint to ensure the fire-proof and smoke-proof performances at the lap joint between the door leaf and the door frame. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram in the main viewing direction of a steel folding smoke-proof and fire-proof door of the present utility model;
[0016] Figure 2 For the present utility model Figure 1 A cross-sectional view taken along the B-B direction in the figure;
[0017] Figure 3 For the present utility model Figure 1 A cross-sectional view taken along the A-A direction in the figure;
[0018] Figure 4 For the present utility model Figure 1 A cross-sectional view taken along the C-C direction in the figure. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.
[0020] Please refer to Figures 1 to 4 , a steel folding smoke-proof and fire-proof door, which includes a door frame 1, a door leaf 2, a fire-proof hinge 3, and a fire-proof bolt 4. The door leaf 2 includes at least two door leaf units 21. Two adjacent door leaf units 21 are foldably connected by a fire-proof hinge 3. An opening and closing cavity 5 is formed between two adjacent door leaf units 21. A double-airbag smoke-proof seal 6 is arranged in the opening and closing cavity 5. A U-shaped steel channel 7 is arranged at the joint of the door leaf unit 21 facing away from the opening and closing cavity 5. A fire-proof expansion seal strip 8 is arranged on one side of the U-shaped steel channel 7 facing the opening and closing cavity 5. A positioning groove 51 for installing the fire-proof expansion seal strip 8 is recessed on one side of the opening and closing cavity 5 close to the U-shaped steel channel 7. The folding smoke-proof and fire-proof door of the present utility model realizes the smoke-proof requirement at medium and low temperatures by arranging a double-airbag smoke-proof seal 6 in the opening and closing cavity 5 between the door leaf units 21, realizes the requirement of smoke tightness between the door leaf units 21 after the folding fire-proof door is closed, ensures the fire-proof and smoke-proof effect. The door leaf units 21 are also cooperatively arranged through the U-shaped steel channel 7 and the fire-proof expansion seal strip 8, which can ensure that the door leaf units 21 will not collide and interfere during folding, and at the same time have both fire-proof and smoke-proof performance, meeting the latest requirement of "the fire-proof door should have smoke tightness after closing" in the General Code for Building Fire Protection GB 55037-2022.
[0021] The double-airbag smoke-proof seal 6 includes an L-shaped sealing main body 61 and airbag parts 62 arranged at both ends of the sealing main body 61. The L-shaped sealing main body 61 is attached to the opening of the opening and closing cavity 5. The cooperative design of the sealing main body 61 and the airbag parts 62 ensures the smoke-proof sealing effect.
[0022] A card slot 11 is arranged on one side of the door frame 1. An airbag-type fire-proof and smoke-proof seal 9 is embedded in the card slot 11. The airbag-type fire-proof and smoke-proof seal 9 includes an embedded clamping part 91 that cooperates with the card slot 11 and a spherical airbag part 92 that is attached to the door leaf 2. The airbag-type fire-proof and smoke-proof seal 9 ensures the sealing and smoke-proof effect through the spherical airbag part 92 and ensures stable cooperation with the door frame 1 through the clamping part 91.
[0023] An L-shaped sealing baffle 21 is welded on one side of the door leaf 2. A V-shaped seal 10 is arranged at the joint between the L-shaped sealing baffle 21 and the door frame 1. The V-shaped seal 10 and the L-shaped sealing baffle 21 are arranged to cooperate with the smoke-proof seal ring 9 to form a double-sealing structure at the joint between the door frame 1 and the door leaf 2, and the sealing and smoke-proof effect is excellent.
[0024] The door leaf unit 21 includes an upper door leaf panel 211, a magnesium oxychloride fireproof board 212, a fireproof door core board 213, and a lower door leaf panel 214 which are arranged in sequence from top to bottom. A U-shaped skeleton 215 is arranged in the fireproof door core board 213. The upper door leaf panel 211 and the lower door leaf panel 214 are both cold-rolled from galvanized steel plates, which cooperate with the U-shaped skeleton 215 to ensure the strength of the door leaf. The magnesium oxychloride fireproof board 212 and the fireproof door core board 213 ensure the fireproof and fire-resistant characteristics of the door leaf unit 21.
[0025] A fireproof lock 12 is arranged on the door leaf 1, and two adjacent door leaf units 21 are locked by fireproof bolts 4.
[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A steel folding smoke-proof and fire-proof door, comprising a door frame, a door leaf, a fire-proof hinge and a fire-proof bolt, wherein the door leaf comprises at least two door leaf units, and two adjacent door leaf units are foldably connected by a fire-proof hinge, and is characterized in that: An opening and closing cavity is formed between two adjacent door leaf units. A double-airbag smoke-proof seal is arranged in the opening and closing cavity. At the joint of the door leaf unit facing the opening and closing cavity, there is a U-shaped channel steel arranged in the opposite direction. A fireproof expansion sealing strip is arranged on one side of the U-shaped channel steel facing the opening and closing cavity. A positioning groove for installing the fireproof expansion sealing strip is concaved on one side of the opening and closing cavity close to the U-shaped channel steel.
2. A steel folding smoke-proof and fire-proof door according to claim 1, characterized in that: The double-airbag smoke-proof seal includes an L-shaped sealing main body and airbag parts arranged at both ends of the sealing main body. The L-shaped sealing main body is attached to the opening of the opening and closing cavity.
3. A steel folding smoke-proof and fire-proof door according to claim 2, characterized in that: A clamping groove is arranged on one side of the door frame, and an airbag-type fireproof and smoke-proof seal is embedded in the clamping groove. The airbag-type fireproof and smoke-proof seal includes an embedded clamping part fitted on the clamping groove and a spherical airbag part attached to the door leaf.
4. A steel folding smoke-proof and fire-proof door according to claim 3, characterized in that: An L-shaped sealing baffle is welded on one side of the door leaf, and a V-shaped seal is arranged at the joint between the L-shaped sealing baffle and the door frame.
5. A steel folding smoke-proof and fire-proof door according to claim 1 or 2 or 3 or 4, characterized in that: The door leaf unit includes an upper door leaf panel, a magnesium oxychloride fireproof board, a fireproof door core board, and a lower door leaf panel arranged in sequence from top to bottom. A U-shaped skeleton is arranged in the fireproof door core board. Both the upper door leaf panel and the lower door leaf panel are cold-rolled from galvanized steel sheets.
6. A steel folding smoke and fire door according to claim 1 or 2 or 3 or 4, characterized in that: A fireproof lock is arranged on the door leaf, and two adjacent door leaf units are locked by fireproof bolts.