CN216849432U

CN216849432U - High-temperature-resistant irradiation crosslinked cable

Info

Publication number: CN216849432U
Application number: CN202220412713.9U
Authority: CN
Inventors: 游靖华; 崔科; 陈伟家; 魏宜; 卫建良; 刘任龙
Original assignee: Hubei Longteng Hongqi Cable Group Co ltd
Current assignee: Hubei Longteng Hongqi Cable Group Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-06-28
Anticipated expiration: 2032-02-28

Abstract

High temperature resistant irradiation crosslinked cable, including many conductors, the outer crosslinked polyethylene insulating layer of parcel of each conductor, fire-retardant band twines many conductors together, and the gap is filled by the fine rope of alkali-free glass between fire-retardant band and each conductor, and the parcel has the restrictive coating outside fire-retardant band, the utility model discloses can remain stable transmission for a long time under high temperature environment to the burning can not appear.

Description

High-temperature-resistant irradiation crosslinked cable

Technical Field

The utility model relates to a high temperature resistant irradiation crosslinked cable.

Background

The common electric wire and cable uses plastic and rubber as insulating sheaths, and the materials are conventional engineering materials, have rich sources, can meet the requirement of large-scale production, and have relatively low cost. However, for some special industries such as petrochemical industry, steel, aerospace, shipbuilding, military industry, pharmacy, food, plastic machinery, boilers and other industries related to heat and high temperature, wires and cables capable of resisting certain high temperature are needed, ordinary wires and cables cannot be used obviously, and wires and cables capable of resisting high temperature can be used for ensuring safe operation of electric power and signals.

Due to the high-temperature resistant use characteristic of the irradiation crosslinked cable, the problem in the market of the domestic cable industry is not solved at present, and the service life of the cable is maintained by frequently replacing the cable and increasing the cost input and the labor input in the cable industry. This has greatly influenced work efficiency, increases cost of enterprises. But the major market for cables is now dependent on importation. Therefore, the development of high-quality and durable high-temperature radiation-resistant crosslinked cables to meet the market demand is urgent.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide high temperature resistant irradiation crosslinked cable, can remain stable transmission for a long time under high temperature environment to the burning can not appear.

In order to solve the above problem, the technical scheme of the utility model is that:

the high-temperature irradiation resistant crosslinked cable comprises a plurality of conductors, a crosslinked polyethylene insulating layer wraps the conductors, the conductors are wound together by the flame-retardant wrapping tape, gaps between the flame-retardant wrapping tape and the conductors are filled with alkali-free glass fiber ropes, and a sheath layer wraps the flame-retardant wrapping tape.

The utility model has the advantages that: firstly, the temperature resistance grade is high, and the conductor allows the working temperature to be 105 ℃, 125 ℃ and 150 ℃ for a long time (the common cable is 70 ℃ or 90 ℃); the flame retardant property is good: the bundled burn test was class a. (common cables are of class C); the cable has no smoke gas and toxic gas, the light transmittance is more than or equal to 90 percent, and the PH value is more than or equal to 6.0 (the light transmittance of the common low-smoke halogen-free cable is more than or equal to 60 percent, and the PH value is more than or equal to 4.3); the mechanical property is excellent. The wear-resisting times are 16 ten thousand, and the service life is more than 70 years.

Drawings

The invention will be further explained with reference to the drawings:

fig. 1 is a schematic sectional view of the present invention.

In the figure: the cable comprises a conductor 1, a crosslinked polyethylene insulating layer 2, an alkali-free glass fiber rope 3, a flame-retardant wrapping tape 4, a sheath layer 5, a flame-retardant composite tape 6, a water-swelling water-blocking tape 7 and an ultraviolet-proof film 8.

Detailed Description

As shown in fig. 1, high temperature irradiation resistant crosslinked cable, including earth core copper conductor 1 and three main core copper conductors 1, each conductor 1 is wrapped up crosslinked polyethylene insulating layer 2 outward, fire-retardant band 4 twines many conductors 1 together, the gap is filled by alkali-free glass fine cord 3 between fire-retardant band 4 and each conductor 1, fire-retardant band 4 and alkali-free glass fine cord 3 all have very strong fire-retardant temperature resistance, protective insulation layer 2 is not destroyed by the burning, it has fire-retardant polyolefin oversheath layer 5 to wrap up outside fire-retardant band 4, fire-retardant polyolefin has very strong fire resistance outward, toxic gas and black cigarette are not produced during the burning, and mechanical properties is good.

And a water-absorbing expansion water-blocking tape 7 is wrapped between the sheath layer 5 and the flame-retardant wrapping tape 4. When the sheath layer 5 is damaged and moisture permeates, the water absorption expansion water-blocking tape 7 absorbs the moisture to expand, and the moisture cannot permeate the water absorption expansion water-blocking tape 7 to prevent the moisture from contacting the conductor 1.

The conductor 1 is wrapped with a flame-retardant composite belt 6, and the flame-retardant composite belt 6 is a ceramic fireproof and fire-resistant composite belt. The ceramic fireproof and fireproof composite tape comprises 110 parts of silicone rubber, 18 parts of nano calcium carbonate, 13 parts of carbon fiber, 0.7 part of coupling agent M320 and 1 part of hydroxyl silicone oil, and can be rapidly sintered into ceramic armor when the flame-retardant composite tape 6 is burnt on a cable, so that the flame-retardant composite tape is excellent in flame-retardant property, does not fall off during burning, and further has a flame-retardant effect.

An ultraviolet-proof film 8 is arranged outside the sheath layer 5. The ultraviolet-proof film 8 is a polyvinyl chloride film containing resorcinol monobenzoate, and the ultraviolet-proof film 8 can reduce the damage of ultraviolet radiation to the cable, prevent the cable from aging and prolong the service life of the cable.

The cable is inspected, and the result shows that the cable has excellent performance indexes and meets the design requirements, and the cable is represented by the specification NGW-YJ (F) Y-1500.6/1 kV 3 × 240+1 × 120 as an example:

1. The direct current resistance of the conductor 1 at 20 ℃ of the cable meets the requirement of the GB/T3956-.

2. And in a withstand voltage test, the insulation is not broken down at 3.5 kV/5 min.

3. In a high-temperature impact voltage test, when the working temperature of the cable conductor 1 is 150 ℃, the insulated wire core is required to bear impact voltage of ten times, the peak value is 10 kV, and the cable conductor is not broken down.

4. And (3) no visible cracks and crevasses on the surface of the cable in a high-temperature test.

5. And (4) a low-smoke characteristic test shows that the light transmittance is more than or equal to 60%.

6. Halogen-free characteristic test shows that the sheath Ph value is more than or equal to 4.3, and the conductivity is less than or equal to 10 us/mm.

Claims

1. High temperature resistant irradiation crosslinked cable, including many conductors (1), each conductor (1) outsourcing crosslinked polyethylene insulating layer (2), its characterized in that: the flame-retardant wrapping tape (4) winds a plurality of conductors (1) together, gaps between the flame-retardant wrapping tape (4) and each conductor (1) are filled with alkali-free glass fiber ropes (3), and a sheath layer (5) wraps the flame-retardant wrapping tape (4).

2. The high temperature radiation resistant crosslinked cable of claim 1, wherein: a water-absorbing expansion water-blocking tape (7) is wrapped between the sheath layer (5) and the flame-retardant wrapping tape (4).

3. The high temperature radiation resistant crosslinked cable of claim 1, wherein: the conductor (1) is wrapped with a flame-retardant composite tape (6).

4. The high temperature radiation resistant crosslinked cable of claim 3, wherein: the flame-retardant composite belt (6) is a ceramic fireproof and fire-resistant composite belt.

5. The high temperature radiation resistant crosslinked cable of claim 1, wherein: an ultraviolet-proof film (8) is arranged outside the sheath layer (5).

6. The high temperature radiation resistant crosslinked cable according to any one of claims 1 to 5, characterized in that: the sheath layer (5) is a halogen-free low-smoke flame-retardant polyolefin outer sheath.

7. The high temperature radiation resistant crosslinked cable according to any one of claims 1 to 5, characterized in that: the conductor (1) comprises a ground wire core copper conductor (1) and a plurality of main wire core copper conductors (1).