CN2893871Y

CN2893871Y - Control cable for nuclear power station use

Info

Publication number: CN2893871Y
Application number: CN 200620080941
Authority: CN
Inventors: 丁东; 丁方
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-02-13
Filing date: 2006-02-13
Publication date: 2007-04-25
Anticipated expiration: 2016-02-13

Abstract

A control cable for nuclear power station has a plurality of cores. Each core is internally provided with a conductor with an external insulation. The bundled multi-core is covered under a wrap which is provided with an external fiberglass band shielded in a final external sheath. The cable is characterized in that a tinning copper-wire woven shield, a fiberglass band and a wrap are arranged in sequence between the fiberglass band and the external sheath. The external sheath is a halogen-free irradiated cross-linked PVC sheath with low fume performance and excellent flame retardant property. The filler is a halogen-free PVC material with low fume performance and excellent flame retardant property. The utility model has a thermal life which ups to 40 years and above and a radiation resistance which ups to 500KGy. The low-cost utility model has a high flame retardant property and resistance to nuclear radiation and high temperature, thereby ensuring that the nuclear reactor can be safely closed in case of mass fire, high temperature, high pressure and nuclear radiation due to leakage of the nuclear safety shell.

Description

Control cable for nuclear power station

Technical field

The utility model relates to a kind of control cable for nuclear power station.

Background technology

The existing conventional control cable has many cores, and there is conductor the inside of every core, and there is insulating barrier the outside of this conductor; There is band outside behind many core bunchys, and there is the glass fiber belt this band outside, and outermost has oversheath; Between each core inserts is arranged; Many at present with thermoplastic making insulating barrier and oversheath.Though this control cable is simple in structure, can not satisfy the requirement of several the key technical indexes of nuclear power stations such as thermal life length, radiation hardness, the right property of high resistant simultaneously, particularly the cracking problem of cable jacket is felt simply helpless especially.

Summary of the invention

The purpose of this utility model provides a kind of control cable for nuclear power station, and it can overcome above-mentioned shortcoming of the prior art.

A kind of control cable for nuclear power station has many cores, and there is conductor the inside of every core, and there is insulating barrier the outside of this conductor; There is band outside behind many core bunchys, in this band and between each core inserts is arranged, and there is the glass fiber belt band outside, and outermost has oversheath; It is characterized in that between glass fiber belt and oversheath, being equipped with successively tinned copper wire woven shield, glass fiber belt and band; Described oversheath is the polyethylene cross-linking radiation oversheath with low cigarette, Halogen, fire resistance; Described inserts is the polyethylene with low cigarette, Halogen, fire resistance.

The utility model is used for nuclear reactor factory building, the nuclear auxiliary building of nuclear power station, the design specification that can satisfy the modern nuclear power generator environment requires: the thermal life can reach more than 40 years, radiation hardness can reach 500KGy, the anti-flammability height, and than similar imported product low price more than 50%.When generation big fire, high temperature, high pressure, nuclear radiation take place to leak in the nuclear safety shell, its double-layer insulating structure, composite shielding layer structure and IXPE oversheath with low cigarette, Halogen, fire resistance, can tolerate the impact of nuclear radiation and high temperature, guarantee the supply of power supply within a certain period of time, thereby can ensure that nuclear reactor safety closes.

Description of drawings

Accompanying drawing is a structural representation of the present utility model.

Embodiment

The utility model has many (2-49 root) cores, and all there is conductor 1 inside of every core, and all there is insulating barrier 2 outside of this conductor 1; There is band 3 outside behind many core bunchys, low cigarette, Halogen, fire-retardant polyethylene inserts 9 are arranged in this band 3 and between each core, there is glass fiber belt 4 these band 3 outsides, outermost has oversheath 8, and tinned copper wire woven shield 5, glass fiber belt 6, band 7 are housed between glass fiber belt 4 and oversheath 8 successively.Wherein insulating barrier 2 is double-deck, one deck in this bilayer is the insulating barrier that is made of high flame retardant, the low cigarette of high-intensity material, Halogen IXPE, another layer is the insulating barrier that the IXPE by height insulation, high water resistant performance constitutes, both organically combine, and make core can satisfy flammability, water absorption, high-temperature insulation, the isoparametric requirement of constant resistivity under nuclear environment; Low cigarette, Halogen, fire-retardant polyethylene inserts 9 can improve fire resistance.The utlity model has superpacket belt and composite flame-proof glass fiber belt structure, can guarantee whole cable radiation hardness function and satisfy the requirement that whole cable combustion hinders; Outermost IXPE oversheath 8 has functions such as low cigarette, Halogen, fire-retardant radiation hardness, high thermal life.

Claims

1, a kind of control cable for nuclear power station has many cores, and there is conductor (1) inside of every core, and there is insulating barrier (2) outside of this conductor (1); There is band (3) outside behind many core bunchys, in this band (3) and between each core inserts (9) is arranged, and there is glass fiber belt (4) band (3) outside, and outermost has oversheath (8); It is characterized in that between glass fiber belt (4) and oversheath (8), being equipped with successively tinned copper wire woven shield (5), glass fiber belt (6) and band (7); The polyethylene cross-linking radiation oversheath of described oversheath (8) for having low cigarette, Halogen, fire resistance; The polyethylene of described inserts (9) for having low cigarette, Halogen, fire resistance.

2, control cable as claimed in claim 1 is characterized in that described insulating barrier (2) is for double-deck; One deck in this bilayer is the insulating barrier that is made of the IXPE with high flame retardant, the low cigarette of high-intensity material, Halogen, and another layer is the insulating barrier that is made of the IXPE with high insulation, high water resistant performance.