Low-heat-release non-dripping wiring cable

Abstract

The utility model relates to the technical field of cables, and discloses a low-heat-release non-dripping wiring cable, which comprises a first sheath, a second sheath fixedly sleeved in the first sheath, a fireproof layer fixedly sleeved in the second sheath, and uniformly distributed cable bodies fixedly sleeved in the fireproof layer. The second sheath comprises a sheath main body, the outer side and the inner side of the sheath main body are provided with uniformly distributed corrugated grooves, the fireproof layer comprises a fixing layer, and the interior of the fixing layer is fixedly connected with an isolation layer; according to the utility model, the fixed layer is the mineral substance wrapping tape, a basic structure of multi-layer wrapping is adopted, each layer of wrapping tape is partially overlapped with the previous layer and completely covers and tightly wraps the isolation layer, the structure can be kept stable at high temperature, and meanwhile, the isolation layer adopts a high-viscosity impregnant, so that the service life of the cable is prolonged. And when the material in the isolating layer reaches the high-temperature limit, the isolating layer is in a plastic wax shape, dripping is avoided, and fire prevention and high-temperature dripping prevention through the fireproof layer are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and more specifically to a low-heat-release, non-drip wiring cable. Background Technology

[0002] A cable is an electrical energy or signal transmission device composed of several or groups of conductors. It has structures such as insulation layers and sheaths and is used for power transmission, communication and equipment connection. The core function of a cable is to transmit electrical energy or signals efficiently and safely. Fire-resistant cables are cables that can still maintain normal operation or delay the burning time in the event of a fire. They are mainly used to protect life safety and reduce fire losses. The main types of fire-resistant cables include halogen-free low-smoke fire-resistant cables, mineral-insulated cables and fire-resistant cables. They are widely used in places with extremely high fire safety requirements, such as subways, hospitals, schools and other densely populated places.

[0003] While existing fire-resistant cables have a certain flame-retardant effect, they are not suitable for vertical installation. If the cable catches fire, the flames will burn upwards along the cable due to its vertical installation, releasing high temperatures and preventing the cable from self-extinguishing. Furthermore, the burning cable will drip a large amount of heat, further releasing heat and rendering the cable unusable. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a low-heat release, non-drip wiring cable to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a low-heat release, non-drip wiring cable, comprising a first sheath, a second sheath fixedly sleeved inside the first sheath, a fireproof layer fixedly sleeved inside the second sheath, a uniformly distributed cable body fixedly sleeved inside the fireproof layer, the second sheath comprising a sheath body, the outer and inner sides of the sheath body having uniformly distributed corrugated grooves, the fireproof layer comprising a fixing layer, and an isolation layer fixedly connected inside the fixing layer.

[0006] Furthermore, the cable body includes an insulation layer, and a filling layer is fixedly connected inside the insulation layer.

[0007] Furthermore, the insulating layer is mica tape mineral insulation or ceramicized silicone rubber, and the filler layer is flame-retardant polyvinyl chloride, alkali-free glass fiber, or flexible rubber.

[0008] Furthermore, the filling layer is internally fixedly connected with uniformly distributed cable cores, which are oxygen-free copper cores.

[0009] Furthermore, the first sheath is a low-smoke halogen-free polyolefin sheath, a ceramicized low-smoke halogen-free polyolefin refractory sheath, or an ethylene propylene rubber sheath.

[0010] Furthermore, the second sheath is a fire-resistant corrugated copper sheath, a fire-resistant corrugated aluminum alloy sheath, or a ceramicized composite material corrugated sheath.

[0011] Furthermore, the fixing layer is a mineral wrapping tape, which has a multi-layer wrapping structure, and the distribution of each wrapping tape is dense and uniform.

[0012] Furthermore, the isolation layer is an inorganic mineral material or a cross-linked polyethylene mixed with a high-viscosity impregnating agent.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model features a fireproof layer with a mineral wrapping tape as the outer fixing layer. It adopts a multi-layer wrapping structure, with each layer of wrapping tape overlapping the previous one to completely cover and tightly wrap the isolation layer. This ensures structural stability at high temperatures. At the same time, a high-viscosity impregnating agent is used in the isolation layer. When the material in the isolation layer reaches the high temperature limit, it becomes a plastic waxy substance, preventing dripping. This facilitates fire prevention through the fireproof layer and avoids high-temperature dripping.

[0015] 2. This utility model features a cable body, an insulation layer to isolate the inside and outside of the cable, and a filling layer to protect the cable core. It is resistant to high temperature and corrosion. At the same time, it uses materials such as ceramicized silicone rubber, which has low heat release, which helps to slow down the temperature rise and prevent the spread of fire. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the second sheath of this utility model.

[0018] Figure 3 This is a schematic diagram of the fireproof layer of this utility model.

[0019] Figure 4 This is a schematic diagram of the main body of the cable of this utility model.

[0020] The attached diagram is labeled as follows: 1. First sheath; 2. Second sheath; 201. Sheath body; 202. Corrugated groove; 3. Fireproof layer; 301. Fixing layer; 302. Isolation layer; 4. Cable body; 401. Insulation layer; 402. Filling layer; 403. Cable core. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The low heat release non-drip wiring cable involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Reference Figures 1-4 This utility model provides a low-heat-release, non-drip wiring cable, including a first sheath 1, a second sheath 2 fixedly sleeved inside the first sheath 1, a fireproof layer 3 fixedly sleeved inside the second sheath 2, and a uniformly distributed cable body 4 fixedly sleeved inside the fireproof layer 3. The second sheath 2 includes a sheath body 201, with uniformly distributed corrugated grooves 202 on the outer and inner sides of the sheath body 201. The fireproof layer 3 includes a fixing layer 301, with an isolation layer 302 fixedly connected inside the fixing layer 301. The outer fixing layer 301 of the fireproof layer 3 is a mineral wrapping tape, adopting a multi-layer wrapping basic structure. Each layer of wrapping tape partially overlaps the previous layer, completely covering and tightly wrapping the isolation layer 302, which can maintain structural stability at high temperatures. At the same time, a high-viscosity impregnating agent is used inside the isolation layer 302. When the material in the isolation layer 302 reaches the high-temperature limit, it becomes a plastic waxy substance, preventing dripping. This is beneficial for fire prevention through the fireproof layer 3 and preventing high-temperature dripping.

[0023] In a preferred embodiment, the cable body 4 includes an insulation layer 401, and a filling layer 402 is fixedly connected inside the insulation layer 401. The insulation layer 401 isolates the inside and outside of the cable, and the filling layer 402 protects the cable core 403. It is resistant to high temperature and corrosion. At the same time, it is made of materials such as ceramicized silicone rubber, which has low heat release, which helps to slow down the temperature rise and prevent the spread of fire.

[0024] In a preferred embodiment, the insulating layer 401 is mica tape mineral insulation or ceramicized silicone rubber, and the filler layer 402 is flame-retardant polyvinyl chloride, alkali-free glass fiber, or flexible rubber.

[0025] In a preferred embodiment, a uniformly distributed cable core 403 is fixedly connected inside the filling layer 402. The cable core 403 is an oxygen-free copper core. The uniform distribution of the cable core 403 ensures a low eccentricity, which guarantees a uniform thickness of the insulation layer 401. At the same time, the copper core has excellent tensile strength and strong stability.

[0026] In a preferred embodiment, the first sheath 1 is a low-smoke halogen-free polyolefin sheath, a ceramicized low-smoke halogen-free polyolefin fire-resistant sheath, or an ethylene propylene rubber sheath. The first sheath 1 is environmentally friendly and flame-retardant, which can delay the spread of flames and produce less smoke.

[0027] In a preferred embodiment, the second sheath 2 is a fire-resistant corrugated copper sheath, a fire-resistant corrugated aluminum alloy sheath, or a ceramicized composite material corrugated sheath. The second sheath 2 enhances the mechanical strength and flexibility of the cable, making it easier to bend.

[0028] In a preferred embodiment, the fixing layer 301 is a mineral wrapping tape, the fixing layer 301 has a multi-layer wrapping structure, and the distribution of each layer of wrapping tape is dense and uniform.

[0029] In a preferred embodiment, the isolation layer 302 is an inorganic mineral material or a cross-linked polyethylene mixed with a high-viscosity impregnating agent.

[0030] The working principle of this utility model:

[0031] The cable body 4 is formed by wrapping the filler layer 402 with the insulation layer 401 and uniformly fixing the cable core 403 inside the filler layer 402. The uniform distribution of the cable core 403 ensures a low eccentricity and uniform thickness of the insulation layer 401. The copper core also exhibits excellent tensile strength and high stability. The insulation layer 401 isolates the cable from the outside, while the filler layer 402 protects the cable core 403, providing high temperature and corrosion resistance. Furthermore, the use of materials such as ceramicized silicone rubber results in low heat release, which helps to mitigate temperature fluctuations. To prevent the fire from spreading, a fireproof layer 3 is fixed to the outside of the cable body 4. The outer fixing layer 301 of the fireproof layer 3 is a mineral wrapping tape with a multi-layer wrapping structure. Each layer of wrapping tape partially overlaps the previous layer, completely covering and tightly wrapping the isolation layer 302. This ensures structural stability at high temperatures. At the same time, a high-viscosity impregnating agent is used inside the isolation layer 302. When the material in the isolation layer 302 reaches the high temperature limit, it becomes a plastic waxy substance, preventing dripping. This facilitates fire prevention through the fireproof layer 3 and avoids high-temperature dripping.

[0032] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low heat release non-dripping wiring cable comprising a first sheath (1), characterized in that: The first sheath (1) is fixedly fitted with a second sheath (2), the second sheath (2) is fixedly fitted with a fireproof layer (3), the fireproof layer (3) is fixedly fitted with a uniformly distributed cable body (4), the second sheath (2) includes a sheath body (201), the outer and inner sides of the sheath body (201) are provided with uniformly distributed corrugated grooves (202), the fireproof layer (3) includes a fixing layer (301), and the fixing layer (301) is fixedly connected with an isolation layer (302).

2. A low heat release, non-dripping wiring cable according to claim 1, characterized in that: The cable body (4) includes an insulation layer (401), and a filling layer (402) is fixedly connected inside the insulation layer (401).

3. A low heat release, non-dripping wiring cable according to claim 2, characterized in that: The insulating layer (401) is mica tape mineral insulation or ceramicized silicone rubber, and the filling layer (402) is flame-retardant polyvinyl chloride, alkali-free glass fiber or flexible rubber.

4. A low heat release, non-dripping wiring cable according to claim 3, characterized in that: The filling layer (402) is internally fixedly connected with uniformly distributed cable cores (403), which are oxygen-free copper cores.

5. A low heat release, non-dripping wiring cable according to claim 1, characterized in that: The first sheath (1) is a low-smoke halogen-free polyolefin sheath, a ceramicized low-smoke halogen-free polyolefin refractory sheath, or an ethylene propylene rubber sheath.

6. A low heat release, non-dripping wiring cable according to claim 1, characterized in that: The second sheath (2) is a fireproof corrugated copper sheath, a fireproof corrugated aluminum alloy sheath, or a ceramic composite material corrugated sheath.

7. A low heat release, non-dripping wiring cable according to claim 1, characterized in that: The fixing layer (301) is a mineral wrapping tape, and the fixing layer (301) has a multi-layer wrapping structure, and the distribution of each layer of wrapping tape is dense and uniform.

8. A low heat release, non-dripping wiring cable according to claim 1, characterized in that: The isolation layer (302) is an inorganic mineral material or a cross-linked polyethylene mixed with a high-viscosity impregnating agent.

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