B1-level fireproof cable for fire fighting

Abstract

A fire-fighting B1-level fireproof cable comprises insulating cable cores, a ceramic silicone rubber layer, a corrosion-resistant layer, an outer fireproof layer, a metal armor layer, a wear-resistant layer and an outer protective layer, the ceramic silicone rubber layer wraps the outer layers of the insulating cable cores, the outer fireproof layer wraps the outer wall of the ceramic silicone rubber layer, the metal armor layer wraps the outer wall of the outer fireproof layer, and the wear-resistant layer wraps the outer protective layer. A wear-resistant layer is extruded on the outer wall of the metal armor layer, an outer sheath layer is extruded on the outer wall of the wear-resistant layer, and a buffer bag protruding inwards is arranged on the inner wall of the ceramic silicone rubber layer and corresponds to a gap between the adjacent insulating cable cores. The inner fireproof layer, the insulating layer and the flame-retardant layer of the insulating cable core have good fireproof and insulating performance, the ceramic silicone rubber layer is combusted to form a hard shell which is not easy to break and fall off, the effect of preventing fire from spreading into the cable is facilitated, the metal armor layer, the wear-resistant layer and the outer protective layer support and protect the inner layer, and the service life of the cable is prolonged. The resistance to external impact and friction force is improved, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cable production, in particular to a B1-level fireproof cable for fire fighting. Background Art

[0002] Cables are made of one or more mutually insulated conductors and an outer insulating protective layer. Common cables have poor fireproofing effects. In the event of a fire, high temperatures can easily damage the cables, increasing the risk and reducing the service life of the cables. Cables also produce a large amount of toxic gases and smoke during the combustion process. However, cables used for firefighting need to have a combustion performance of B1 or above, smoke toxicity of t0, and burning drips or particles of d0, so as to avoid the cables from burning in the process of firefighting, resulting in a short fire resistance time, or poor high temperature resistance when used for firefighting, decomposing at high temperatures to produce toxic smoke and other substances, causing great harm to the firefighters or nearby people. Summary of the Invention

[0003] The utility model aims to solve the deficiencies of the prior art and provide a B1-level fireproof cable for fire fighting.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A Class B1 fireproof cable for firefighting, comprising an insulating cable core, a ceramic silicone rubber layer, a corrosion-resistant layer, an outer fireproof layer, a metal armor layer, a wear-resistant layer and an outer protective layer. The outer layers of multiple insulating cable cores are coated with a ceramic silicone rubber layer, the outer wall of the ceramic silicone rubber layer is wrapped around the outer fireproof layer, the outer wall of the outer fireproof layer is wrapped around the metal armor layer, the outer wall of the metal armor layer is extruded with a wear-resistant layer, the outer wall of the wear-resistant layer is extruded with an outer sheath layer, the inner wall of the ceramic silicone rubber layer is provided with inwardly protruding buffer bags at the gaps corresponding to adjacent insulating cable cores, and fireproof fillers are filled between the insulating cable cores and the ceramic silicone rubber layer.

[0006] The insulated cable core includes a conductor core, an inner fireproof layer, an insulating layer, a flame retardant tape layer and an inner protective layer. The outer wall of the conductor core is extruded with the inner fireproof layer, the outer wall of the inner fireproof layer is extruded with the insulating layer, the outer wall of the insulating layer is wrapped with the flame retardant tape layer, and the outer wall of the flame retardant tape layer is extruded with the inner protective layer.

[0007] The inner fireproof layer is made of extruded polypropylene, and the material of the outer fireproof layer is ceramic mica paper.

[0008] The insulating layer is made of low-smoke halogen-free insulating material.

[0009] The flame retardant tape layer is formed by double-layer wrapping of glass fiber tape and low-smoke zero-halogen tape.

[0010] The inner protective layer and the outer protective layer are made of PE plastic particles.

[0011] The corrosion-resistant layer is made of polytetrafluoroethylene.

[0012] The wear-resistant layer is made of polyurethane.

[0013] The fireproof filler is a fireproof mineral filling rope.

[0014] The beneficial effects of the present invention are as follows: the inner fireproof layer, insulating layer and flame retardant layer of the insulating cable core of the present invention have good fire resistance and insulation performance; the inwardly protruding buffer bag of the ceramic silicone rubber layer plays a role in positioning the insulating cable core; at the same time, the ceramic silicone rubber layer burns to form a hard shell that is not easy to break and fall off, which is beneficial to blocking the spread of fire to the inside of the cable; the metal armor layer, wear-resistant layer and outer protective layer provide support and protection for the inner layer, improve resistance to external impact and friction, and extend the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the insulating cable core structure of the utility model;

[0017] In the figure: 1- conductor core; 2- inner fireproof layer; 3- insulation layer; 4- flame retardant tape layer; 5- inner protective layer; 6- ceramic silicone rubber layer; 61- buffer package; 7- corrosion-resistant layer; 8- outer fireproof layer; 9- metal armor layer; 10- wear-resistant layer; 11- outer protective layer; 12- fireproof filler; 13- insulated cable core;

[0018] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] A Class B1 fireproof cable for firefighting, comprising an insulating cable core 13, a ceramic silicone rubber layer 6, a corrosion-resistant layer 7, an outer fireproof layer 8, a metal armor layer 9, a wear-resistant layer 10 and an outer protective layer 11. The outer layers of multiple insulating cable cores 13 are coated with a ceramic silicone rubber layer 6, the outer wall of the ceramic silicone rubber layer 6 is wrapped around the outer fireproof layer 8, the outer wall of the outer fireproof layer 8 is wrapped around the metal armor layer 9, the outer wall of the metal armor layer 9 is extruded with a wear-resistant layer 10, and the outer wall of the wear-resistant layer 10 is extruded with an outer sheath layer 11. The inner wall of the ceramic silicone rubber layer 6 is provided with an inwardly protruding buffer bag 61 at the gap corresponding to adjacent insulating cable cores 13, and a fireproof filler 12 is filled between the insulating cable core 13 and the ceramic silicone rubber layer 6.

[0021] The insulated cable core 13 includes a conductor core 1, an inner fireproof layer 2, an insulating layer 3, a flame retardant tape layer 4 and an inner protective layer 5. The outer wall of the conductor core 1 is extruded with the inner fireproof layer 2, the outer wall of the inner fireproof layer 2 is extruded with the insulating layer 3, the outer wall of the insulating layer 3 is wrapped with the flame retardant tape layer 4, and the outer wall of the flame retardant tape layer 4 is extruded with the inner protective layer 5, so that the insulated cable core 13 has fireproof and insulating properties.

[0022] The inner fireproof layer 2 is made of extruded polypropylene, and the outer fireproof layer 8 is made of ceramic mica paper. The inner and outer double layers of fireproof materials work together to improve the fireproof performance of the cable.

[0023] The insulating layer 3 is made of low-smoke halogen-free insulating material, and no toxic smoke will be generated at high temperatures during a fire.

[0024] The flame retardant tape layer 4 is formed by double-wrapping glass fiber tape and low-smoke zero-halogen tape to improve the flame retardant effect of the cable.

[0025] The inner protective layer 5 and the outer protective layer 11 are made of PE plastic particles, and polyethylene has good heat resistance.

[0026] The corrosion-resistant layer 7 is made of polytetrafluoroethylene, which has the characteristics of high temperature resistance and low temperature resistance, thereby improving the service life of the cable.

[0027] The wear-resistant layer 10 is made of polyurethane, which has high mechanical strength and oxidation stability, and thus high flexibility and resilience.

[0028] The fireproof filler 12 is a refractory mineral filling rope. The refractory mineral decomposes at high temperature to generate non-combustible oxides, thereby improving the fireproof performance.

[0029] When used, the inner fireproof layer 2 of the insulating cable core 13 is made of polypropylene material. Polypropylene is non-toxic, odorless, and has strength, rigidity, hardness and heat resistance that are better than low-pressure polyethylene. The insulating layer 3 is also made of low-smoke halogen-free insulating material, which will not produce toxic smoke at high temperatures. The flame-retardant wrapping layer 4 and the inner protective layer improve the heat resistance and flame retardancy of the cable. The ceramic silicone rubber layer 6 fixes the inner insulating cable core 13 at low temperatures, thereby improving the compactness of the cable. At high temperatures in the event of a fire, the ceramic silicone rubber layer 6 produces a ceramic body, which blocks the flame from continuing to spread to the inside of the cable. The fireproof filler 12 filled in the gap between the insulating cable core 13 and the ceramic silicone rubber layer 6 decomposes at high temperatures to generate non-combustible oxides, further blocking the flame from spreading to the inside of the cable. The metal armor layer 9 and the wear-resistant layer 10 improve the physical impact resistance of the cable and increase the service life of the cable. In the event of a fire, the cable will not produce toxic gases and smoke when burning at high temperatures, thereby reducing the harm to people's health.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A B1 fireproof cable for firefighting, characterized in that: The invention comprises an insulating cable core (13), a ceramic silicone rubber layer (6), a corrosion-resistant layer (7), an outer fireproof layer (8), a metal armor layer (9), a wear-resistant layer (10) and an outer protective layer (11); the outer layers of the plurality of insulating cable cores (13) are coated with the ceramic silicone rubber layer (6); the outer wall of the ceramic silicone rubber layer (6) is wrapped around the outer fireproof layer (8); the outer wall of the outer fireproof layer (8) is wrapped around the metal armor layer (9); the outer wall of the metal armor layer (9) is extruded with the wear-resistant layer (10); the outer wall of the wear-resistant layer (10) is extruded with the outer protective layer (11); the inner wall of the ceramic silicone rubber layer (6) is provided with an inwardly protruding buffer bag (61) at the gap corresponding to the adjacent insulating cable cores (13); and the insulating cable core (13) and the ceramic silicone rubber layer (6) are filled with a fireproof filler (12).

2. A Class B1 fireproof cable for firefighting according to claim 1, characterized in that: The insulated cable core (13) comprises a conductor core (1), an inner fireproof layer (2), an insulating layer (3), a flame-retardant tape layer (4) and an inner protective layer (5); the outer wall of the conductor core (1) is extruded with the inner fireproof layer (2); the outer wall of the inner fireproof layer (2) is extruded with the insulating layer (3); the outer wall of the insulating layer (3) is wrapped with the flame-retardant tape layer (4); and the outer wall of the flame-retardant tape layer (4) is extruded with the inner protective layer (5).

3. A Class B1 fireproof cable for firefighting according to claim 2, characterized in that: The inner fireproof layer (2) is made of extruded polypropylene, and the material of the outer fireproof layer (8) is ceramic mica paper.

4. A Class B1 fireproof cable for firefighting according to claim 2, characterized in that: The insulating layer (3) is made of low-smoke halogen-free insulating material.

5. A Class B1 fireproof cable for firefighting according to claim 2, characterized in that: The flame retardant tape layer (4) is formed by double-layer wrapping of glass fiber tape and low-smoke zero-halogen tape.

6. A Class B1 fireproof cable for firefighting according to claim 2, characterized in that: The inner protective layer (5) and the outer protective layer (11) are made of PE plastic particles.

7. A Class B1 fireproof cable for firefighting according to claim 2, characterized in that: The corrosion-resistant layer (7) is made of polytetrafluoroethylene.

8. A Class B1 fireproof cable for firefighting according to claim 2, characterized in that: The wear-resistant layer (10) is made of polyurethane.

9. A Class B1 fireproof cable for firefighting according to claim 2, characterized in that: The fireproof filler (12) is a fireproof mineral filling rope.

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