Safe fire-resistant power cable used in high-temperature environment

Abstract

The utility model discloses a safe fire-resistant power cable in a high temperature environment, which relates to the technical field of power cables and comprises a ceramic silicone rubber sheath, a polyimide sintering layer is arranged in the ceramic silicone rubber sheath, a high-flame-retardant low-smoke halogen-free wrapping tape is arranged in the polyimide sintering layer, and a high-flame-retardant low-smoke halogen-free wrapping tape is arranged in the high-flame-retardant low-smoke halogen-free wrapping tape. A first insulating layer is arranged in the high-flame-retardant low-smoke halogen-free wrapping tape, a plurality of second insulating layers are arranged in the first insulating layer in a circumferential array mode, a filling layer is arranged between each second insulating layer and the first insulating layer, a synthetic mica tape is arranged in each second insulating layer, a tinned copper conductor is arranged in each synthetic mica tape, and the tinned copper conductor is arranged in the high-flame-retardant low-smoke halogen-free wrapping tape. And a framework is arranged in the filling layer. According to the safe fire-resistant power cable in the high-temperature environment, the synthetic mica tapes are overlapped and lapped, so that fire-resistant and high-temperature-resistant performance can be achieved, the conductors can be effectively tightened, the high-flame-retardant low-smoke halogen-free lapping tape is used for tightening, smoke and toxic gas generated during combustion are reduced, and the overall roundness of the cable is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to power cable technical field, concretely is a kind of safe fire-resistant power cable under high-temperature environment. BACKGROUND

[0002] With the adjustment of global energy structure and the promotion of clean energy, the demand for nuclear power generation is growing, which in turn drives the demand for nuclear power plant cable market, and the research and development of new cable technology will bring new growth point to the market. There is a certain fire risk in production, once fire occurs, ordinary cable is easy to burn, and a large amount of toxic gas and smoke will be released, which will aggravate the harm of fire, so the industry needs to continuously upgrade and innovate technology, and hereby develop such cable, the cable of such product has excellent flame-retardant property, is not easy to burn when fire occurs, can effectively reduce the spread of fire, reduce the harm of fire to equipment and personnel. SUMMARY

[0003] The utility model aims at providing a kind of safe fire-resistant power cable under high-temperature environment to solve the deficiency in the prior art described above.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: the safe fire-resistant power cable under high-temperature environment, including ceramic silicon rubber sheath, the ceramic silicon rubber sheath is equipped with polyimide sintering layer, the polyimide sintering layer is equipped with high flame-retardant low-smoke halogen-free wrapping tape, the high flame-retardant low-smoke halogen-free wrapping tape is equipped with first insulating layer, the first insulating layer is equipped with multiple second insulating layers in circular array, the second insulating layer and first insulating layer between each are equipped with filling layer, each second insulating layer is equipped with synthetic mica tape, each synthetic mica tape is equipped with tinned copper conductor, the filling layer is equipped with a framework.

[0005] Further, the framework is cross-shaped, and the center of the framework is provided with a steel wire rope.

[0006] Further, the filling layer is made of alkali-free glass fiber material.

[0007] Further, multiple compression-resistant strips are arranged in circular array in the cavity between the ceramic silicon rubber sheath and the polyimide sintering layer, and each compression-resistant strip is made of rubber material.

[0008] Further, the first insulating layer and the second insulating layer are both made of ceramic silicon rubber material.

[0009] Compared with existing technologies, the beneficial effects provided by this utility model are as follows: This high-temperature environment safe fire-resistant power cable uses tin-plated copper conductors. The tightly compressed conductor structure is round and not easily loosened. The tin plating layer can effectively prevent the copper conductor from oxidizing, improve its corrosion resistance and oxidation resistance, and extend the cable's service life. The tin-plated copper conductor is wrapped with overlapping synthetic mica tape, which can provide fire resistance and high-temperature resistance, and can more effectively tighten the conductor, reducing the probability of deformation or folding caused by violent construction, thus affecting electrical performance and service life. It is tightened with high flame-retardant, low-smoke, halogen-free wrapping tape, reducing the generation of smoke and toxic gases during combustion, and effectively ensuring the overall roundness of the cable. The polyimide sintered layer often has self-extinguishing characteristics and forms some relatively stable carbonized layers and other structures during combustion, which can effectively isolate oxygen and prevent the further continuation of the combustion reaction. The ceramicized silicone rubber sheath gives the cable excellent flame-retardant and high-temperature resistance properties, as well as good elasticity. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0011] Fig. 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0012] Fig. 2 A top view of the overall structure provided for an embodiment of this utility model.

[0013] Explanation of reference numerals in the attached drawings: 1. Ceramicized silicone rubber sheath; 2. Polyimide sintered layer; 3. High flame retardant, low smoke, halogen-free wrapping tape; 4. First insulation layer; 5. Second insulation layer; 6. Synthetic mica tape; 7. Tin-plated copper conductor; 8. Skeleton; 9. Steel wire rope; 10. Filler layer; 11. Compression strip. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0015] Please see Figs. 1-2The present invention provides a technical solution: a fire-resistant power cable for high-temperature environments, comprising a ceramicized silicone rubber sheath 1, a polyimide sintered layer 2 inside the ceramicized silicone rubber sheath 1, a high flame-retardant, low-smoke, halogen-free wrapping tape 3 inside the polyimide sintered layer 2, a first insulation layer 4 inside the high flame-retardant, low-smoke, halogen-free wrapping tape 3, a plurality of second insulation layers 5 arranged in a circular array inside the first insulation layer 4, a filling layer 10 between each second insulation layer 5 and the first insulation layer 4, a synthetic mica tape 6 inside each second insulation layer 5, a tin-plated copper conductor 7 inside each synthetic mica tape 6, and a skeleton 8 inside the filling layer 10.

[0016] As a preferred technical solution, the skeleton 8 is cross-shaped, and a steel wire rope 9 is provided in the center of the skeleton 8. Specifically, the skeleton 8 evenly divides multiple second insulation layers 5 into four areas. The skeleton 8 is made of rubber and is located inside the filler layer 10, which can effectively improve the overall strength and tensile strength of the cable. The steel wire rope 9 can effectively improve the overall strength and tensile strength of the skeleton 8, thereby improving the overall performance of the cable.

[0017] As a preferred technical solution, the filling layer 10 is made of alkali-free glass fiber material. Specifically, alkali-free glass fiber fills the gaps in the cable core. Alkali-free glass fiber can improve the overall chemical stability, electrical insulation performance, and strength of the cable.

[0018] As a preferred technical solution, the cavity between the ceramicized silicone rubber sheath 1 and the polyimide sintered layer 2 is provided with multiple pressure-resistant strips 11 arranged in a circular array. Each pressure-resistant strip 11 is made of rubber. Specifically, each pressure-resistant strip 11 is designed to enhance the pressure resistance of the cable.

[0019] As a preferred technical solution, both the first insulation layer 4 and the second insulation layer 5 are made of ceramicized silicone rubber material, which specifically gives the cable excellent flame retardant and high temperature resistance properties, as well as good elasticity.

[0020] Working Principle: This high-temperature safety fire-resistant power cable uses tin-plated copper conductors 7. The tightly compressed conductor structure is round and not easily loosened. The tin plating layer effectively prevents copper conductor oxidation, improves its corrosion resistance and oxidation resistance, and extends the cable's service life. The tin-plated copper conductors 7 are wrapped with overlapping synthetic mica tape 6, which provides fire resistance and high-temperature resistance, and effectively tightens the conductor, reducing the probability of deformation or folding due to rough construction, thus affecting electrical performance and service life. High flame-retardant, low-smoke, halogen-free wrapping tape 3 further tightens the cable, reducing smoke and toxic gas production during combustion and effectively ensuring cable safety. The overall roundness, the alkali-free glass fiber filling the gaps in the cable core, the alkali-free glass fiber can improve the overall chemical stability, electrical insulation performance and strength of the cable, the polyimide sintered layer 2 often has the characteristics of self-extinguishing, and during the combustion process, it will form some relatively stable carbonized layers and other structures, which can effectively isolate oxygen and prevent the further continuation of the combustion reaction. The ceramicized silicone rubber sheath 1 gives the cable excellent flame retardant and high temperature resistance properties, and good elasticity, giving the cable excellent flame retardant properties, making it difficult to burn in the event of a fire, effectively reducing the spread of fire and reducing the harm of fire to equipment and personnel.

[0021] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fire-resistant power cable designed for high-temperature environments, characterized in that, The device includes a ceramicized silicone rubber sheath (1), which contains a polyimide sintered layer (2), a high flame-retardant, low-smoke, halogen-free wrapping tape (3) within the polyimide sintered layer (2), a first insulating layer (4) within the high flame-retardant, low-smoke, halogen-free wrapping tape (3), a plurality of second insulating layers (5) arranged in a circular array within the first insulating layer (4), a filling layer (10) between each second insulating layer (5) and the first insulating layer (4), a synthetic mica tape (6) within each second insulating layer (5), a tin-plated copper conductor (7) within each synthetic mica tape (6), and a skeleton (8) within the filling layer (10).

2. The fire-resistant power cable for high-temperature environments according to claim 1, characterized in that, The frame (8) is cross-shaped, and a steel wire rope (9) is provided at the center of the frame (8).

3. The fire-resistant power cable for high-temperature environments according to claim 1, characterized in that, The filling layer (10) is made of alkali-free glass fiber material.

4. The fire-resistant power cable for high-temperature environments according to claim 1, characterized in that, The cavity between the ceramicized silicone rubber sheath (1) and the polyimide sintered layer (2) is provided with a plurality of pressure-resistant strips (11) arranged in a circular array, and each of the pressure-resistant strips (11) is made of rubber.

5. The fire-resistant power cable for high-temperature environments according to claim 1, characterized in that, Both the first insulating layer (4) and the second insulating layer (5) are made of ceramicized silicone rubber material.

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