Polyurethane door and window fireproof sealing strip
By designing polyurethane fireproof sealing strips for doors and windows, and utilizing PU foam material and graphite layers to expand and fill gaps at high temperatures, the problem of gaps after installation of door and window sealing strips is solved, achieving efficient fireproof and heat insulation performance, and improving safety and sealing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI HUXINYUAN TECHNOLOGY CO LTD
- Filing Date
- 2025-04-14
- Publication Date
- 2026-04-17
AI Technical Summary
Existing door and window sealing strips have gaps between themselves and the door and window frames after installation, resulting in poor fire resistance and an inability to effectively prevent flames and dense smoke from seeping into the room.
A polyurethane fireproof sealing strip for doors and windows was designed, including a first sealing part, a connecting part, a second sealing part, and a rebound part. It utilizes PU foam material and a graphite layer to expand and fill gaps at high temperatures, and combines friction protrusions and anti-slip textures to improve sealing performance and stability.
It effectively fills the gaps between doors and windows and the frame, improves fire resistance and heat insulation performance, enhances sealing and safety, prevents flames and smoke from seeping in, and extends service life.
Smart Images
Figure CN224134535U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door and window sealing strip technology, specifically a polyurethane fireproof sealing strip for doors and windows. Background Technology
[0002] Doors and windows are classified as enclosure components or partition components according to their location, and have different design requirements, including functions such as heat preservation, heat insulation, sound insulation, waterproofing, and fireproofing. New requirements include energy conservation. In cold regions, heat loss through gaps in doors and windows accounts for about 25% of the total heating energy consumption. The airtightness of doors and windows is an important aspect of energy-saving design. Doors and windows are important components of the building envelope system, and sealing strips are installed in the gaps of doors and windows.
[0003] Existing sealing strips still have certain limitations in practical applications. When the sealing strip is installed on the door and window frame, there is still a certain space between the sealing strip and the door and window frame, which cannot completely fill the gaps in the door. In the event of a fire, flames and thick smoke can seep into the room. The insulation performance is poor and the safety is low. In view of this, we propose a polyurethane fireproof sealing strip for doors and windows to solve the above problems. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a polyurethane fireproof sealing strip for doors and windows, which solves the problem that some existing door and window sealing strips have gaps between them and the door and window frames after installation, resulting in poor fireproof performance.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a polyurethane fireproof sealing strip for doors and windows, comprising a sealing strip body, wherein the sealing strip body is composed of a first sealing part, a connecting part, a second sealing part, and a rebound part, the connecting part is fixedly connected to the lower surface of the first sealing part, the second sealing part is fixedly connected to the lower surface of the connecting part, the rebound part is fixedly connected to the upper surface of the first sealing part, the rebound part is arc-shaped, the opposite side surfaces of the first sealing part and the rebound part form a cavity, and a frame is provided on the outside of the sealing strip body, the frame being adapted to the sealing strip body.
[0008] Preferably, the first sealing portion is composed of a recess, a first filling chamber, and a first expansion layer.
[0009] Preferably, the recessed portion is disposed on both sides of the first sealing portion, the first filling chamber is disposed inside the first sealing portion, and the first expansion layer covers the outer surface of the first sealing portion.
[0010] Preferably, the second sealing part is composed of friction protrusions, protrusions, and two second filling chambers.
[0011] Preferably, the friction protrusion is fixedly connected to the lower surface of the second sealing part, the protrusion is disposed on both sides of the second sealing part, and the two second filling chambers are respectively disposed on both sides inside the second sealing part.
[0012] Preferably, the rebound portion is composed of a second expansion layer, anti-slip texture, and sealing protrusions.
[0013] Preferably, the anti-slip texture is provided on the inner wall of the second expansion layer, and the sealing protrusion is fixedly connected to the lower surface of the rebound part.
[0014] Preferably, the interior of the chamber is provided with a first lifting part and a second lifting part, the first lifting part is fixedly connected to the upper surface of the first sealing part, and the second lifting part is fixedly connected to the upper surface of the first lifting part.
[0015] (III) Beneficial Effects
[0016] Compared with the prior art, this utility model provides a polyurethane fireproof sealing strip for doors and windows, which has the following beneficial effects:
[0017] 1. This polyurethane fireproof sealing strip for doors and windows solves the problem of gaps between existing door and window sealing strips and the door and window frames after installation, resulting in poor fire resistance, through the cooperation of the first sealing part and the second sealing part. It allows expansion at high temperatures, thereby filling the gaps between the sealing strip body and the door / window frame, further improving the sealing performance, minimizing the infiltration of flames and dense smoke into the room, improving fire resistance and heat insulation performance, and providing high safety.
[0018] 2. This polyurethane fireproof sealing strip for doors and windows increases the friction between the sealing strip body and the door / window through the anti-slip texture. The first and second lifting parts support the rebound part, preventing deformation of the rebound part after prolonged use and improving the rebound efficiency of the rebound part, thereby further improving the sealing performance between the sealing strip body and the door / window. The friction protrusions increase the friction between the sealing strip body and the frame, thus improving the stability of the sealing strip body after installation. Attached Figure Description
[0019] Figure 1 This is a structural schematic diagram of a polyurethane fireproof sealing strip for doors and windows according to this utility model;
[0020] Figure 2 This is a schematic diagram of the mounting plane of the sealing strip body of this utility model;
[0021] Figure 3 This is a plan view of the first sealing part of this utility model;
[0022] Figure 4 This is a plan view of the second sealing part of this utility model.
[0023] In the figure: 1. Sealing strip body; 11. First sealing part; 111. Recessed part; 112. First filling chamber; 113. First expansion layer; 12. Connecting part; 13. Second sealing part; 131. Friction protrusion; 132. Protrusion; 133. Second filling chamber; 14. Rebound part; 141. Second expansion layer; 142. Anti-slip texture; 143. Sealing protrusion; 2. Frame; 3. Chamber; 31. First lifting part; 32. Second lifting part. Detailed Implementation
[0024] 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.
[0025] Please see Figures 1-4 This utility model provides a technical solution: a polyurethane fireproof sealing strip for doors and windows, including a sealing strip body 1. The sealing strip body 1 is composed of a first sealing part 11, a connecting part 12, a second sealing part 13, and a rebound part 14. The connecting part 12 is fixedly connected to the lower surface of the first sealing part 11, the second sealing part 13 is fixedly connected to the lower surface of the connecting part 12, and the rebound part 14 is fixedly connected to the upper surface of the first sealing part 11. The shape of the rebound part 14 is arc-shaped, and the opposite side surfaces of the first sealing part 11 and the rebound part 14 form a cavity 3.
[0026] Furthermore, a frame 2 is provided on the outside of the sealing strip body 1, and the frame 2 is adapted to the sealing strip body 1.
[0027] When the staff installs the sealing strip body 1 inside the frame 2, the spring part 14 will protrude from the frame 2. When the door and window are closed, the spring part 14 can play a supporting and rebounding role, preventing the sealing strip body 1 from deforming during use, effectively ensuring the sealing performance of the sealing strip body 1 during use, and thus improving the service life of the sealing strip body 1.
[0028] Furthermore, the first sealing part 11 is composed of a recessed part 111, a first filling chamber 112 and a first expansion layer 113. The recessed part 111 is disposed on both sides of the first sealing part 11, the first filling chamber 112 is disposed inside the first sealing part 11, and the first expansion layer 113 covers the outer surface of the first sealing part 11.
[0029] Furthermore, the first filling chamber 112 is made of PU foam material, which has good elasticity and toughness, as well as excellent heat insulation performance. Since the PU foam material contains air bubbles or gas, when the material is heated, the gas in these air bubbles will expand, causing the volume of the entire material to increase, thereby supporting the recessed part 111 and filling the gap between the first sealing part 11 and the frame 2, preventing smoke from seeping in.
[0030] Furthermore, the first expansion layer 113 is a graphite layer. The thermal motion in the graphite material will increase the distance between the graphite sheets, so it will expand at high temperature, thereby filling the gap between the sealing strip and the door and window, achieving the purpose of fireproofing and heat insulation, and further improving the fireproofing and heat insulation performance of the sealing strip body 1.
[0031] Furthermore, the second sealing part 13 is composed of friction protrusions 131, protrusions 132, and two second filling chambers 133. The friction protrusions 131 are fixedly connected to the lower surface of the second sealing part 13, and the protrusions 132 are disposed on both sides of the second sealing part 13. The second filling chambers 133 are the same as the first filling chambers 112, both filled with PU foam material. The two second filling chambers 133 are respectively disposed on both sides inside the second sealing part 13. The friction protrusions 131 increase the friction between the sealing strip body 1 and the frame 2, thereby improving the stability of the sealing strip body 1 after installation. The protrusions 132 allow the second sealing part 13 to contact the inner wall of the frame 2 as much as possible, while reducing the difficulty of installation and improving installation efficiency. The second filling chambers 133 allow the second sealing part 13 to expand when the sealing strip body 1 is subjected to high temperature, so that the two protrusions 132 fill the gap between the frame 2 and the second sealing part 13.
[0032] Furthermore, the spring-loaded part 14 is composed of a second expansion layer 141, anti-slip texture 142 and sealing protrusion 143. The anti-slip texture 142 is disposed on the inner wall of the second expansion layer 141, and the sealing protrusion 143 is fixedly connected to the lower surface of the spring-loaded part 14. The second expansion layer 141 has the same structure as the first expansion layer 113, both of which are graphite layers.
[0033] The anti-slip texture 142 increases the friction between the sealing strip body 1 and the door / window. The second expansion layer 141 expands when the temperature rises during a fire, thus filling the gap between the sealing strip body 1 and the door / window and improving the sealing performance. The sealing protrusion 143 improves the sealing performance between the rebound part 14 and the frame 2.
[0034] Furthermore, the interior of the chamber 3 is provided with a first lifting part 31 and a second lifting part 32. The first lifting part 31 is fixedly connected to the upper surface of the first sealing part 11, and the second lifting part 32 is fixedly connected to the upper surface of the first lifting part 31. The first lifting part 31 and the second lifting part 32 can support the rebound part 14, preventing the rebound part 14 from deforming after long-term use, while improving the rebound efficiency of the rebound part 14, and further improving the sealing performance between the sealing strip body 1 and the door and window.
[0035] The cooperation of the first sealing part 11 and the second sealing part 13 solves the problem that some existing door and window sealing strips have gaps with the door and window frames after installation, resulting in poor fire resistance. This allows them to expand at high temperatures, thereby filling the gaps between the sealing strip body 1 and the door / window and frame 2, further improving the sealing performance, minimizing the infiltration of flames and smoke into the room, improving fire resistance and heat insulation performance, and ensuring high safety.
[0036] Working principle:
[0037] When the polyurethane fireproof sealing strip for doors and windows is in use, the sealing strip body 1 is installed inside the frame 2 by the staff. At this time, the rebound part 14 will protrude from the frame 2. When the door and window are closed, the rebound part 14 can play a supporting and rebounding role, preventing the sealing strip body 1 from deforming during use. Subsequently, when the temperature rises in the event of a fire, the first sealing part 11 and the second sealing part 13 expand to fill the gap.
[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A polyurethane fireproof sealing strip for doors and windows, comprising a sealing strip body (1), characterized in that: The sealing strip body (1) is composed of a first sealing part (11), a connecting part (12), a second sealing part (13) and a spring-loaded part (14). The connecting part (12) is fixedly connected to the lower surface of the first sealing part (11), the second sealing part (13) is fixedly connected to the lower surface of the connecting part (12), and the spring-loaded part (14) is fixedly connected to the upper surface of the first sealing part (11). The spring-loaded part (14) is arc-shaped. The opposite side surfaces of the first sealing part (11) and the spring-loaded part (14) form a cavity (3). A frame (2) is provided on the outside of the sealing strip body (1), and the frame (2) and the sealing strip body (1) are adapted to each other.
2. The polyurethane fireproof sealing strip for doors and windows according to claim 1, characterized in that: The first sealing part (11) is composed of a recess (111), a first filling chamber (112) and a first expansion layer (113).
3. A polyurethane fire seal for doors and windows according to claim 2, characterized in that: The recessed portion (111) is disposed on both sides of the first sealing portion (11), the first filling chamber (112) is disposed inside the first sealing portion (11), and the first expansion layer (113) covers the outer surface of the first sealing portion (11).
4. The polyurethane fireproof sealing strip for doors and windows according to claim 1, characterized in that: The second sealing part (13) is composed of a friction protrusion (131), a protrusion (132) and two second filling chambers (133).
5. The polyurethane fire barrier seal for doors and windows according to claim 4, characterized in that: The friction protrusion (131) is fixedly connected to the lower surface of the second sealing part (13), the protrusion (132) is disposed on both sides of the second sealing part (13), and the two second filling chambers (133) are respectively disposed on both sides inside the second sealing part (13).
6. The polyurethane fire barrier seal for doors and windows according to claim 1, characterized in that: The rebound portion (14) is composed of a second expansion layer (141), anti-slip texture (142) and sealing protrusion (143).
7. A polyurethane fire seal for doors and windows according to claim 6, characterized in that: The anti-slip texture (142) is provided on the inner wall of the second expansion layer (141), and the sealing protrusion (143) is fixedly connected to the lower surface of the rebound part (14).
8. The polyurethane fire barrier seal for doors and windows according to claim 3, characterized in that: The chamber (3) is provided with a first lifting part (31) and a second lifting part (32). The first lifting part (31) is fixedly connected to the upper surface of the first sealing part (11), and the second lifting part (32) is fixedly connected to the upper surface of the first lifting part (31).