Sealing structure of fireproof door
Through the combined design of spiral hinges and fire-proof sealing rubber strips, the tight sealing of the fire door is achieved by using mechanical pressure, which solves the problem of smoke leakage in the prior art and effectively prevents the spread of fire.
Patent Information
- Application Number
- CN202420932324.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Existing fire doors cannot effectively block the smoke leakage without external force, which is more likely to cause the smoke to spread.
The door leaf and door frame connected by spiral hinges are combined with fire-proof sealing rubber strips and wedge-shaped abutment ends to achieve close contact through the mechanical pressure generated during the door closing process to prevent smoke leakage.
It achieves a sealed effect of not leaking easily and effectively preventing the spread of fire.
Smart Images
Figure CN222314998U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a closed structure, in particular to a closed structure of a fireproof door, and belongs to the technical field of fireproof doors. Background Art
[0002] The "Code for Fire Protection Design of Buildings" GB 50016-2014 (2018 edition) stipulates that evacuation doors in crowded public places and auditoriums should not be equipped with thresholds. Evacuation doors without thresholds can prevent escaping personnel from falling to the ground and causing stampede accidents in environments with poor visibility. However, the defect of having no threshold is that the fire door cannot completely isolate the smoke, and the smoke will leak out from the door gap. In the prior art, in order to overcome this problem, sealing strips are often installed on the upper and lower sides of the door leaf to prevent the spread of smoke. However, the sealing strip does not have the ability to automatically tighten and expand, and in the absence of external force, it is impossible to produce close contact between the gaps. The possibility of smoke leakage is relatively high. Therefore, further improvement is needed. Utility Model Content
[0003] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a closed structure of a fire door, which has a tight sealing effect, is not easy to leak smoke, and effectively prevents the spread of fire.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A closed structure for a fireproof door, comprising a door frame arranged in a door opening; a door leaf is arranged in the door frame, and the door leaf and the door frame are connected by a spiral hinge; a first blocking component is arranged at the bottom of the upper crossbeam of the door frame; a second blocking component is arranged at the bottom of the door leaf; a slot is arranged at the bottom of the door frame relative to the second blocking component; and an abutment end is arranged at the top of the door frame relative to the second blocking component.
[0006] Furthermore, the first blocking component is a fireproof sealing rubber strip arranged at the bottom of the beam; the first blocking group is arranged obliquely at the bottom of the beam; and the cross-section of the first blocking component is a right-angled trapezoid.
[0007] Furthermore, the cross section of the abutting end is wedge-shaped; the abutting end protrudes from the top of the door frame; and the abutting end is in contact with or separated from the bottom of the first blocking component.
[0008] Furthermore, an embedding groove is provided at the top of the door frame relative to the abutting end.
[0009] Furthermore, the second blocking component includes a main body; the main body is embedded in the slot; and the cross-section of the main body is rectangular.
[0010] Furthermore, a plurality of contact stop bars are arranged at the bottom of the main body; each of the contact stop bars is separated from each other to form a gap; and the contact stop bars are in contact with or separated from the threshold of the door frame.
[0011] Furthermore, the main body and the contact stop strip are integrally formed of a fireproof sealing rubber strip; and the threshold is flush with the ground.
[0012] The utility model has the following beneficial effects: due to the effect of the spiral hinge, the horizontal height of the door leaf will be lowered during the door closing process, so that the second blocking component can be tightly pressed against the door sill to achieve the closure of the lower door gap; at the same time, since the door leaf descends, a gap will be generated between the top of the door leaf and the door frame. In order to solve this problem, the first blocking component and the abutting end are matched. During the door closing process, the abutting end will generate upward pressure on the first blocking component as the door leaf rotates, so that the first blocking component and the abutting end are in close contact. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the assembly structure of the utility model.
[0014] Figure 2 It is a structural schematic diagram of a spiral hinge.
[0015] Figure 3 It is a schematic structural diagram of the first plugging component.
[0016] Figure 4 It is a schematic structural diagram of the second plugging component.
[0017] In the figure: 1 is a door frame, 2 is a door leaf, 3 is a spiral hinge, 4 is a fireproof sealing rubber strip, 5 is an abutting end, 6 is a main body, 7 is a slot, and 8 is a contact stop strip. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] The terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art, unless the terms are defined differently. It should be understood that the terms defined in commonly used dictionaries have the same meaning as those in the prior art.
[0020] See also Figure 1-Figure 2
[0021] A closed structure of a fireproof door, comprising a door frame 1 arranged in a door opening; a door leaf 2 is arranged in the door frame 1, and the door leaf 2 is connected to the door frame 1 through a spiral hinge 3; a first blocking component is arranged at the bottom of the upper crossbeam of the door frame 1; a second blocking component is arranged at the bottom of the door leaf; a slot 7 is arranged at the bottom of the door frame relative to the second blocking component; and a supporting end 5 is arranged at the top of the door frame relative to the second blocking component.
[0022] Furthermore, the first blocking component is a fireproof sealing rubber strip 4 arranged at the bottom of the beam; the first blocking group is arranged obliquely at the bottom of the beam; and the cross section of the first blocking component is a right-angled trapezoid.
[0023] Furthermore, the cross section of the abutting end 5 is wedge-shaped; the abutting end 5 protrudes from the top of the door leaf 2; and the abutting end 5 is in contact with or separated from the bottom of the first blocking component.
[0024] Furthermore, an embedding groove is provided at the top of the door leaf 2 relative to the abutting end 5 .
[0025] Specifically, in this embodiment, when the wedge-shaped abutting end 5 gradually approaches the fireproof sealing rubber strip 4, contact occurs between the two, and the abutting end 5 pushes the fireproof sealing rubber strip 4 upward to deform it; until the door leaf is completely closed, the abutting end 5 and the fireproof sealing rubber strip 4 are in close contact. In addition, since the door leaf is lowered during the closing process, the distance between the top of the door leaf and the door frame crossbeam will increase, and the abutting end 5 is higher than the top of the door leaf, so the abutting end 5 can contact the fireproof sealing rubber strip 4, and as the rotation process continues, the contact area between the abutting end 5 and the fireproof sealing rubber strip 4 increases, and the close contact makes it difficult for smoke to spread.
[0026] Furthermore, the second blocking component includes a main body 6 ; the main body 6 is embedded in the slot 7 ; and the cross section of the main body 6 is rectangular.
[0027] Furthermore, a plurality of contact bars 8 are disposed at the bottom of the main body 6; each of the contact bars 8 is separated from each other to form a gap; and the contact bars 8 are in contact with or separated from the threshold of the door frame.
[0028] Specifically, also during the door closing process, the height of the door leaf is reduced, which causes the contact bar 8 to deform, forming a tight seal, preventing the spread of flames, smoke and heat, and playing a role in fire isolation.
[0029] Furthermore, the main body and the contact stop strip are integrally formed of a fireproof sealing rubber strip; and the threshold is flush with the ground.
[0030] Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the utility model rather than limiting it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A closed structure of a fire door, comprising a door frame arranged in a door opening; a door leaf is arranged in the door frame, characterized in that: The door leaf and the door frame are connected by a spiral hinge; a first blocking component is arranged at the bottom of the upper crossbeam of the door frame; a second blocking component is arranged at the bottom of the door leaf; a slot is arranged at the bottom of the door frame relative to the second blocking component; and a supporting end is arranged at the top of the door frame relative to the second blocking component.
2. A closed structure for a fire door according to claim 1, characterized in that: The first blocking component is a fireproof sealing rubber strip arranged at the bottom of the beam; the first blocking group is arranged obliquely at the bottom of the beam; the cross section of the first blocking component is a right-angle trapezoid.
3. The closed structure of a fire door according to claim 2, characterized in that: The cross section of the abutting end is wedge-shaped; the abutting end protrudes from the top of the door leaf; and the abutting end is in contact with or separated from the bottom of the first blocking component.
4. The closed structure of a fire door according to claim 3, characterized in that: An embedding groove is arranged at the opposite abutting end of the door leaf top.
5. The closed structure of a fire door according to claim 1, characterized in that: The second blocking component comprises a main body; the main body is embedded in the slot; and the cross section of the main body is rectangular.
6. The closed structure of a fire door according to claim 5, characterized in that: A plurality of contact stop bars are arranged at the bottom of the main body; each of the contact stop bars is separated from each other to form a gap; and the contact stop bars are in contact with or separated from the threshold of the door frame.
7. The closed structure of a fire door according to claim 6, characterized in that: The main body and the contact stop strip are integrally formed of a fireproof sealing rubber strip; and the threshold is flush with the ground.