Fireproof sealing strip
By clamping a fireproof metal ring in the sealing strip and setting heat dissipation holes, the problem of cracking caused by uneven expansion of the sealing strip in high-temperature environments is solved, thus maintaining the integrity of the sealing effect and fire-retardant function at high temperatures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YICHANG AOGAR NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-06-12
AI Technical Summary
Existing fireproof sealing strips are prone to cracking due to uneven expansion in high-temperature environments, leading to leakage of intumescent fire-retardant materials and failing to effectively block the vertical spread of flames and high-temperature smoke.
A fireproof metal ring is clamped in the sealing strip body, and a heat dissipation ring is vertically connected to the ring. The heat dissipation ring has heat dissipation holes to form a forced convection channel to reduce the accumulation of thermal stress.
To prevent uneven expansion of the colloid, avoid the generation of through cracks, ensure that the fire-retardant material fully expands and seals the pipes in a confined space, and maintain its fire-retardant function.
Smart Images
Figure CN224352386U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire-resistant rings, and in particular to a fireproof sealing strip. Background Technology
[0002] Fire collars (also called fireproof collars) are made of metal with a flame-retardant expanding core material inside. They are fitted onto the outer wall of rigid polyvinyl chloride (PVC) pipes and fixed to the floor or wall. When a fire occurs, the core material expands rapidly due to heat, squeezing the UPVC pipe and sealing the pipe opening in a short time, preventing the fire from spreading along the opening. This product has the advantages of compact structure, beautiful appearance, organic combination of leak prevention and fire protection, and convenient construction and installation.
[0003] In the design and application of fire arrestors, a critical component in fire protection systems, sealing strips play a vital initial barrier role. However, when exposed to the high temperatures generated by a fire, these sealing strips exhibit a significant performance weakness: they are highly susceptible to substantial volume expansion due to heat. This expansion is not uniform and stable, often accompanied by intense internal stress accumulation, ultimately leading to the strip's rupture or significant through-cracks. Once this cracking occurs, the intumescent fire-arresting material (such as expanded graphite or vermiculite), which was originally tightly wrapped and constrained within the fire arrestor, finds a critical leakage path. Under high-temperature stimulation, the material undergoes a chemical reaction that should produce a large volume expansion, attempting to expand and seal the pipe pores. However, due to seal failure, some, or even most, of the material leaks out from the broken sealing strip during the expansion process and is lost to the external environment. The consequences are catastrophic: the intumescent material, which should have been constrained within the limited space of the fire arrestor, generating strong compressive force and densely filling the pipe gaps, fails to form a complete and dense seal in the core area due to partial loss. The failure to effectively establish the crucial physical blocking structure of the fire arrestor ring allowed flames and high-temperature smoke to continue spreading through these insufficiently filled gaps or channels, ultimately causing the overall fire-stopping function of the fire arrestor ring to completely fail and become unable to effectively block the vertical spread path of the fire. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a fireproof sealing strip.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0006] This utility model discloses a fireproof sealing strip, comprising a sealing strip body, characterized in that a fireproof metal ring is sandwiched in the middle of the sealing strip body, the fireproof metal ring extends outward, the inner diameter of the fireproof metal ring is the same as the inner diameter of the sealing strip body, a heat dissipation annular plate is connected to the fireproof metal ring, the connection position of the heat dissipation annular plate and the fireproof metal ring is perpendicular, and multiple evenly distributed heat dissipation holes are opened on the heat dissipation annular plate for air circulation and heat dissipation.
[0007] As a preferred embodiment of this utility model, the heat dissipation hole is a conical hole, with the outer diameter being 0.3-0.5 mm larger than the inner diameter.
[0008] As a preferred technical solution of this utility model, the fireproof metal ring is made of 304 stainless steel or titanium alloy.
[0009] As a preferred embodiment of this invention, the height of the heat dissipation ring is 3-8mm.
[0010] As a preferred embodiment of this utility model, the sealing strip body is made of silicone rubber or fluororubber.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] 1. Fire-resistant metal rings inhibit uneven expansion of the colloid, preventing the formation of penetrating cracks;
[0013] 2. The vertical heat sink and the array holes form a forced convection channel, reducing the accumulation of thermal stress. Attached Figure Description
[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0015] In the attached diagram:
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] In the diagram: 1. Sealing strip body; 2. Fireproof metal ring; 3. Heat dissipation ring; 4. Heat dissipation holes. Detailed Implementation
[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0019] In the attached diagram, all identical reference numerals refer to the same components.
[0020] like Figure 1 As shown, this utility model provides a fireproof sealing strip, including a sealing strip body 1 (marked), with a fireproof metal ring 2 (marked) embedded inside. The fireproof metal ring 2 extends radially outward to form a heat dissipation annular plate 3 (marked), and the two are perpendicularly connected. Circular heat dissipation holes 4 with a diameter of 1-2 mm are arrayed on the surface of the heat dissipation annular plate 3 (marked), with a hole spacing of 3-5 mm. The inner diameter of the fireproof metal ring 2 perfectly matches the inner diameter of the sealing strip body 1, ensuring a close fit to the outer wall of the pipe.
[0021] In this utility model, the fireproof metal ring 2 is made of 0.5mm thick stainless steel sheet, which is combined with the silicone rubber sealing strip body 1 to form an integral structure through a vulcanization process.
[0022] In an optional embodiment, the height of the heat dissipation ring 3 is 5 mm.
[0023] It should be noted that this height design maximizes the heat dissipation area within a limited space, while avoiding interference with pipe installation.
[0024] In an optional embodiment, the heat dissipation hole 4 has a tapered structure, with the outer diameter being larger than the inner diameter.
[0025] It should be noted that this design can accelerate the escape of hot air and enhance the chimney effect.
[0026] In an optional embodiment, the outer surface of the sealing strip body 11 is coated with an intumescent fire-retardant coating.
[0027] It should be noted that the coating foams and expands at temperatures above 200°C, which helps to seal micro-cracks.
[0028] The working principle of this utility model is as follows:
[0029] In the initial stage of a fire, the fire-resistant metal ring 22 rapidly conducts heat to the heat dissipation ring 3, accelerating heat dissipation through the heat dissipation holes 4, effectively suppressing the non-uniform expansion of the sealing strip body 1. As the temperature continues to rise, the metal ring maintains structural integrity to prevent leakage of the fire-retardant material; at the same time, the vertical heat dissipation fins form a three-dimensional air duct, reducing the local temperature peak by about 150°C, allowing the inflatable fire-retardant material to fully expand and seal the pipes within the confined space.
[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A fireproof sealing strip, comprising a sealing strip body (1), characterized in that, The sealing strip body (1) holds a fireproof metal ring (2) in the middle. The fireproof metal ring (2) extends outward. The inner diameter of the fireproof metal ring (2) is the same as the inner diameter of the sealing strip body (1). The fireproof metal ring (2) is connected to a heat dissipation ring (3). The connection position of the heat dissipation ring (3) and the fireproof metal ring (2) is perpendicular. The heat dissipation ring (3) has multiple evenly distributed heat dissipation holes (4) for air circulation and heat dissipation.
2. The fireproof sealing strip according to claim 1, characterized in that, The heat dissipation hole (4) is a tapered hole, with the outer diameter being 0.3-0.5 mm larger than the inner diameter.
3. The fireproof sealing strip according to claim 1, characterized in that, The fireproof metal ring (2) is made of 304 stainless steel or titanium alloy.
4. The fireproof sealing strip according to claim 1, characterized in that, The height of the heat dissipation ring (3) is 3-8mm.
5. The fireproof sealing strip according to claim 1, characterized in that, The sealing strip body (1) is made of silicone rubber or fluororubber.