Fire-fighting and rescue trousers with a leg isolation protection structure
By installing an isolation and protective lining and an anti-friction lining at the cuffs of firefighter trousers, the problem of burns caused by hot steam backflow at the cuffs of firefighter suits has been solved, achieving effective protection and improved comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI GESHI FIRE SAFETY EQUIP CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-29
AI Technical Summary
The existing design of firefighter suit trouser legs cannot effectively seal in high-temperature steam environments, causing hot steam to backflow and burn firefighters' legs. In addition, the existing materials are flame-retardant but not conducive to heat dissipation.
An insulating and protective lining is installed at the cuffs of firefighter trousers, including an insulating layer, a reinforcing layer, and a moisture-wicking layer. It fits tightly to the ankle of the firefighter boot through a tightening structure, forming an air insulation zone to block hot steam from entering. An anti-friction lining is also installed inside the trouser leg to increase comfort.
It effectively blocks hot steam from contacting the skin, preventing burns, while also improving wearing comfort and reducing the risk of injury caused by friction.
Smart Images
Figure CN224292370U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire-fighting equipment technology, and in particular to a protective structure for the leg opening of trousers used in fire extinguishing and rescue operations. Background Technology
[0002] In their daily rescue operations, firefighters often face extremely harsh environments such as high temperatures, dense smoke, and steam. Especially in scenarios such as chemical plant accidents and boiler room emergencies, the work site is often filled with large amounts of high-temperature steam. This steam creates rolling heat waves on the ground, posing a severe challenge to the leg protection of firefighters.
[0003] Currently used firefighting suits have significant design flaws: the trousers are straight-legged and only secured with elastic bands or Velcro. This design has revealed serious problems in actual rescue operations—when firefighters move through steamy environments, the lower edge of the trousers cannot be completely sealed, causing high-temperature steam to create a "chimney effect," continuously backflowing from the trouser legs. Even more seriously, while modern firefighting suits often use high-performance flame-retardant materials like Nomex for the outer layer, which effectively resist open flames, their dense fabric structure hinders heat dissipation. The backflowing hot steam accumulates continuously within the sealed trouser legs, rapidly raising the temperature to over 70°C, which firefighters often fail to notice due to their focus on the rescue.
[0004] In steam-filled environments, approximately 43% of firefighters suffer second-degree burns to their lower limbs. High-temperature steam can damage the dermis within 30 seconds of contact with the skin, and the steam buildup inside rescue suits often extends this exposure time far beyond this critical threshold. Injured firefighters commonly report feeling as if their legs are being boiled like crabs, and often experience skin peeling when removing their protective suits. This not only causes immense pain but also severely impacts subsequent rescue capabilities. Utility Model Content
[0005] The purpose of this utility model is to provide a fire-fighting and rescue trouser leg isolation and protection structure. By setting an isolation and protection structure at the original fire trouser leg, the technical problem of firefighters' legs being burned due to hot steam backflow at the trouser leg of the existing fire suit is solved.
[0006] A fire-fighting and rescue trouser leg isolation and protection structure includes fire-fighting trousers. The trousers have an isolation and protection lining inside the leg opening. The upper part of the isolation and protection lining is tightly connected to the inner surface of the trouser leg. The lower part of the isolation and protection lining extends to form a free end and is provided with a tightening structure. The tightening structure is adapted to the narrowing part of the ankle of a fire boot. The isolation and protection lining includes an isolation layer, a reinforcement layer, and a moisture-wicking layer. After the free end is tightened, it fits tightly against the narrowing part of the ankle of the fire boot. An air insulation zone is formed between the fire-fighting trousers and the isolation and protection lining.
[0007] This invention features an insulating protective lining inside the cuffs of fire trousers, with the upper part of the lining tightly connected to the inner surface of the cuff. The lining also encloses the boot shaft of the fire boot, with the lower part fitting snugly against the narrowing section of the boot shaft. This creates an air insulation zone between the trousers and the insulating protective lining, preventing hot steam entering the trousers through the cuffs from directly contacting the leg skin and causing burns. This invention effectively solves the technical problem of firefighters suffering leg burns due to hot steam backflow from the cuffs of existing fire suits by adding an insulating protective lining to the cuffs.
[0008] The protective liner must be heat-insulating, prevent vapor penetration, be flame-retardant, and provide comfort. Therefore, the protective liner can be designed with the following three-layer structure: an insulating layer, a reinforcing layer, and a moisture-wicking layer. The insulating layer is used for flame retardancy and preventing vapor penetration, the reinforcing layer is used for heat insulation and preventing vapor penetration, and the moisture-wicking layer is in close contact with the skin to absorb moisture and prevent skin sensitivity caused by friction.
[0009] For the insulation and protective lining, you can choose fabrics with basic functions, such as a polyimide film (PI film) for the insulation layer, 3D knitted aramid for the reinforcing layer, and a 3D knitted aramid / spandex mesh for the moisture-wicking layer. These layers are then mechanically sewn together and cut. Alternatively, you can use existing fabrics that simultaneously provide a three-layer structure, such as the FB-S3400 series or polyimide aerogel fabric. One-way ventilation valves, such as the MV210 series or DV-45 series, can be selected to allow for the rapid exhaust of hot vapors from the air-insulated zone to the outside after the area is moved away from the fire.
[0010] Furthermore, the upper part of the protective lining is fixedly connected to the inner surface of the trouser leg by a hot-melt adhesive strip, which has a wavy structure.
[0011] The wavy hot melt adhesive strip connection method has obvious advantages in terms of mechanical strength and environmental resistance, and the connection is highly reliable.
[0012] Furthermore, the upper part of the protective lining is mechanically sewn to the inner surface of the trouser leg.
[0013] Mechanical stitching is a simpler, faster, and easier method of connection, and it offers greater reliability.
[0014] In addition, the connection between the protective lining and the inner surface of the trouser leg can also be achieved using a zipper interlocking method or Velcro.
[0015] Furthermore, the tightening structure includes an elastic ring, which is a cylindrical structure with open ends. The free end is rolled inward to form an annular channel, and the elastic ring is disposed within the annular channel.
[0016] The cylindrical elastic ring increases the contact area at the connection point with the trouser leg, forming a contracting surface at the fire boot joint and enhancing sealing performance. The elastic ring is fixed within the annular channel at the free end to prevent twisting or deformation during use, which could affect the seal at the narrowing point of the fire boot ankle.
[0017] Furthermore, a plurality of strip-shaped silicone rubbers are provided on the inner side of the free end, and the strip-shaped silicone rubbers are arranged in a ring array, with the silicone rubber strips and the elastic ring at the same horizontal height.
[0018] The silicone strip and elastic band are respectively set in different layers at the same position on the free end. When the elastic band is tightened, it can tightly fit the silicone strip to the ankle tightening part of the fire boot to prevent hot steam from entering.
[0019] Furthermore, the fire trousers have an anti-friction lining inside the trouser leg, which is located above the isolation and protective lining.
[0020] Furthermore, the anti-friction lining has a funnel-shaped structure, and the upper part of the anti-friction lining is connected to the inner surface of the trouser leg.
[0021] Fire boots are encased in an insulating protective lining, which comes into direct contact with the skin of the legs. The boot opening rubs against the skin, causing friction damage. Fire trousers have an anti-friction lining inside the trouser leg, positioned above the insulating protective lining. When wearing fire trousers, the legs first come into direct contact with the anti-friction lining, isolating the boot opening between the trouser leg and the anti-friction lining, effectively preventing the skin of the legs from being chafed.
[0022] The anti-friction lining has a loose top and tight bottom structure, which increases comfort. The tight bottom part can completely wrap the legs, making it difficult for the anti-friction lining to move upward during exercise, thus preventing the leg skin from being exposed and coming into direct contact with the fire boot opening, causing friction damage.
[0023] Furthermore, the lower part of the anti-friction liner is an elastic structure and extends into the inside of the boot shaft of the fire boot.
[0024] The tightening parts are made of elastic material, which can enhance the fit to the skin of the legs and make them more comfortable to wear.
[0025] Furthermore, a protective lining is provided at the opening of the fire boot, the protective lining covers the end of the boot shaft body of the fire boot, and the protective lining wraps around the end of the boot shaft body of the fire boot.
[0026] Wrap the lining directly around the top of the fire boot to prevent the boot shaft from coming into direct contact with the skin of the leg and causing friction damage.
[0027] Furthermore, small holes are made on the trouser legs, and one-way ventilation valves are installed inside the small holes.
[0028] One-way vent valves are installed on the outside of the trouser legs, allowing firefighters to promptly expel hot air from the air insulation zone to the outside after leaving the rescue site, thus dispersing the hot air within the air insulation zone in a timely manner. At the rescue site, the one-way vent valves prevent hot outside air from entering the air insulation zone.
[0029] Beneficial effects of utility model
[0030] 1. This utility model incorporates an insulating protective lining at the cuff of fire trousers. This lining is made of flame-retardant, heat-insulating, and vapor-proof material. A tightening structure at the bottom of the lining ensures a tight fit between the lower part of the lining and the ankle of the fire boot, effectively isolating hot vapor from the lining and preventing burns to the leg skin. This utility model features a simple structure, excellent protective effect, and can be directly added to existing fire trouser cuffs, making it convenient, economical, and practical.
[0031] 2. This utility model features an anti-friction lining inside the trouser leg of firefighters. The anti-friction lining has a loose upper and tight lower structure, which increases comfort while the tight lower part can completely wrap the legs, making it difficult for the anti-friction lining to move upward during movement. The legs are in direct contact with the anti-friction lining, and the boot opening is isolated between the trouser leg and the anti-friction lining, effectively preventing the skin of the legs from being chafed by the boot opening. Attached Figure Description
[0032] Figure 1 This is a perspective view of the isolation and protective lining of this utility model;
[0033] Figure 2 This is a perspective view of the anti-friction lining of this utility model;
[0034] Figure 3 This is an enlarged view of section A of this utility model;
[0035] Reference numerals: 1-Fire trousers, 2-trouser leg, 3-Isolation and protective lining, 4-One-way ventilation valve, 5-Free end, 6-Air insulation zone, 7-Annular channel, 8-Elastic ring, 9-Rinse fabric, 10-Fire boot, 11-Anti-friction lining. Detailed Implementation
[0036] Example 1
[0037] like Figure 1As shown, a fire-fighting and rescue trouser leg isolation and protection structure includes fire trousers 1. An isolation and protection lining 3 is provided inside the trouser leg 2 of the fire trousers 1. The upper part of the isolation and protection lining 3 is tightly connected to the inner surface of the trouser leg 2. The lower part of the isolation and protection lining 3 extends to form a free end 5 and is provided with a tightening structure. The tightening structure is adapted to the narrowing part of the ankle of the fire boot 10. The isolation and protection lining 3 includes an isolation layer, a reinforcing layer and a moisture-wicking layer. After the free end 5 is tightened, it fits tightly to the narrowing part of the ankle of the fire boot 10. An air insulation zone 6 is provided between the body of the fire trousers 1 and the isolation and protection lining 3.
[0038] An insulating protective lining 3 is installed inside the cuff 2 of the fire trousers 1, with the upper part of the lining tightly connected to the inner surface of the cuff 2. The protective lining wraps around the boot shaft of the fire boot 10, and the lower part of the lining fits tightly against the narrowing part of the boot shaft, forming an air insulation zone 6 between the fire trousers 1 and the insulating protective lining 3. This utility model effectively solves the technical problem of firefighters' legs being burned due to hot steam backflow at the cuff 2 of existing fire suits by installing an insulating protective lining 3 at the cuff of the fire trousers 1.
[0039] The fabric for the protective liner 3 is selected from the FB-S3400 series, ensuring flame retardancy, heat insulation, and steam insulation while also providing comfort; the one-way vent valve can be selected from the MV210 series. This utility model has a simple structure, good protective effect, and can directly add the protective liner 3 to the existing fire trousers 1 leg, which is convenient to process and economical.
[0040] Example 2
[0041] Based on Example 1, such as Figure 2 and Figure 3 As shown, the tightening structure includes an elastic ring 8, which is a cylindrical structure open at both ends. The free end 5 is curled inward to form an annular channel 7, and the elastic ring 8 is disposed within the annular channel 7. A silicone strip is disposed on the inner side of the free end 5, and the silicone strip and the elastic ring 8 are at the same horizontal height.
[0042] The free end 5 of the protective liner 3 is curled inward and mechanically sewn to form an annular channel 7. An elastic ring, which is a cylindrical structure with open ends, is installed inside the channel and fixed in the annular channel 7 by mechanical sewing to prevent the elastic ring from twisting during use. On the inside of the free end 5, at the tightened part of the elastic ring, multiple silicone strips, each 2mm thick, are attached in a circular array. When the end of the protective liner 3 is fitted over the narrowed ankle area of the fire boot 10, the silicone strips fit tightly against the smooth surface of the fire boot 10, effectively reducing the amount of hot steam entering through the gap between them.
[0043] Example 3
[0044] Based on Example 1, such as Figure 2 As shown, the fire trousers 1 have an anti-friction lining 11 inside the trouser leg, and the anti-friction lining 11 is located above the isolation and protective lining 3. The anti-friction lining 11 has a funnel-shaped structure, and the upper part of the anti-friction lining 11 is connected to the inner surface of the trouser leg. The lower part of the anti-friction lining 11 is an elastic structure and extends into the inside of the boot shaft of the fire boot 10.
[0045] An anti-friction lining 11 is installed inside the leg of the fire trousers 1. The anti-friction lining 11 is positioned above the protective lining 3. When wearing the fire trousers 1, the leg first comes into direct contact with the anti-friction lining 11, isolating the boot opening between the trouser leg and the anti-friction lining 11, effectively preventing skin abrasions. The anti-friction lining 11 has a looser upper section and a tighter lower section, increasing comfort while ensuring complete leg coverage. This prevents the anti-friction lining 11 from shifting upwards during movement, thus avoiding direct contact between the leg skin and the fire boot opening 10, which could cause friction damage. The tighter lower section of the anti-friction lining 11 is made of an elastic material, such as a spandex-nylon blend, which enhances the fit to the leg skin, making it more comfortable to wear.
[0046] Example 4
[0047] Based on Example 1, such as Figure 1 As shown, a protective lining 9 is provided at the boot opening of the fire boot 10. The protective lining 9 covers the end of the boot body of the fire boot 10 and wraps around the end of the boot body of the fire boot 10.
[0048] A lining 9 is wrapped around the opening of the fire boot 10, and the end of the boot shaft is wrapped in the lining to prevent the boot shaft from directly contacting the leg skin and causing friction damage.
Claims
1. A fire-fighting and rescue trouser leg isolation and protection structure, comprising fire-fighting trousers (1), characterized in that, The fire trousers (1) have an insulating protective lining (3) inside the cuffs (2). The upper part of the insulating protective lining (3) is tightly connected to the inner surface of the cuffs (2). The lower part of the insulating protective lining (3) extends to form a free end (5) and is provided with a tightening structure. The tightening structure is adapted to the narrowing part of the ankle of the fire boots (10). The isolation and protective liner (3) includes an isolation layer, a reinforcing layer and a moisture-wicking layer. The free end (5) is tightened and fits tightly against the narrowed ankle of the fire boot (10). An air insulation zone (6) is provided between the body of the fire pants (1) and the isolation and protective liner (3).
2. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 1, characterized in that, The upper part of the isolation and protective lining (3) is fixedly connected to the inner surface of the trouser leg (2) by a hot melt adhesive strip, which has a wavy structure.
3. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 1, characterized in that, The upper part of the isolation and protective lining (3) is mechanically sewn to the inner surface of the trouser leg (2).
4. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 1, characterized in that, The tightening structure includes an elastic ring (8), which is a cylindrical structure with open ends. The free end (5) is rolled inward to form an annular channel (7), and the elastic ring (8) is disposed in the annular channel (7).
5. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 4, characterized in that, A silicone strip is provided on the inner side of the free end (5), and the silicone strip and the elastic ring (8) are at the same horizontal height.
6. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 1, characterized in that, The fire trousers (1) have an anti-friction lining (11) inside the trouser leg, and the anti-friction lining (11) is located above the isolation and protection lining (3).
7. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 6, characterized in that, The anti-friction lining (11) has a funnel-shaped structure, and the upper part of the anti-friction lining (11) is connected to the inner surface of the trouser leg.
8. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 7, characterized in that, The lower part of the anti-friction lining (11) is an elastic structure and extends into the inside of the boot barrel of the fire boot (10).
9. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 1, characterized in that, The fire boot (10) has a protective lining (9) at the boot opening. The protective lining (9) covers the end of the boot body of the fire boot (10) and wraps the end of the boot body of the fire boot (10).
10. The fire-fighting and rescue trouser leg isolation and protection structure according to claim 1, characterized in that, The trouser leg (2) has a small hole, and a one-way ventilation valve (4) is installed in the small hole.