CN100403457C

CN100403457C - Control cable for nuclear power station

Info

Publication number: CN100403457C
Application number: CNB2006100423872A
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: 2008-07-16
Anticipated expiration: 2026-02-13
Also published as: CN1811999A

Abstract

The present invention relates to multiple wire cores. A conductive body is arranged inside each wire core, and an insulation layer is arranged outside the conductive body. During manufacture, the wire cores are firstly made so that multiple wire cores are bundled. A binding band is coated outside a wire core bundle, and filling material is filled between the wire cores and inside the binding band. A fire retardant glass band layer is coated outside the binding band. The wire core is characterized in that a tin plated copper wire woven shield layer, the glass band layer and the binding band are coated outside the fire retardant glass band layer. Then, outer sheathes are coated on the outermost layer and are crosslinked by using electric ray beams. The dose of the electric ray beams is from 8 to 16 Mrad. The thermal life of the present invention can achieve more than 40 years, and the irradiation resistance of the present invention can achieve 500 KGy. The present invention has the advantages of high combustion resistance and low price. When a nuclear containment vessel is leaked to result in intense fire, high temperature, high pressure and nuclear radiation, the wire core can resist the impact of nuclear radiation and high temperature and can be used for ensuring the safety shutdown of atomic reactors.

Description

Control cable for nuclear power station

Technical field

The present invention 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, high flame retardant simultaneously, particularly the cracking problem of cable jacket is felt simply helpless especially.

Summary of the invention

The purpose of this invention is to provide a kind of control cable for nuclear power station, 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 manufacturing process of above-mentioned control cable for nuclear power station, make core earlier, make many core bunchys, outside at the core bundle coats band, at the inserts of packing between each core and within the band, coat the fireproof glass ribbon layer in the band outside, it is characterized in that outside the fireproof glass ribbon layer, being coated with tinned copper wire woven shield, glass fiber belt and band, coat oversheath at outermost layer then, and make oversheath crosslinked with cathode beam.

The present invention 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, sun combustion performance, 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 invention.

Embodiment

The present invention 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; During manufacturing, make core earlier, make many core bunchys, outside at the core bundle coats band 3, between each core, insert inserts 9 within the band 3, coat fireproof glass ribbon layer 4 in band 3 outsides, it is characterized in that outside fireproof glass ribbon layer 4, coating tinned copper wire woven shield 5, glass fiber belt 6 and band 7, coat oversheath 8 at outermost layer then, and make oversheath 8 crosslinked with cathode beam.The dosage of used cathode beam is 8-16Mrad.Wherein insulating barrier 2 is double-deck, one deck in this bilayer is the insulating barrier that the IXPE by the low cigarette of high flame retardant, high-intensity material, Halogen constitutes, 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 present invention 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 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 the IXPE of fire-retardant by having, low cigarette, Halogen constitutes, and another layer is the insulating barrier that is made of the IXPE with insulation, block-water performance.

3. the manufacturing process of the described control cable for nuclear power station of claim 1, make core earlier, make many core bunchys, outside at the core bundle coats band (3), between each core, insert inserts (9) within the band (3), coat fireproof glass ribbon layer (4) in band (3) outside, it is characterized in that outside fireproof glass ribbon layer (4), coating tinned copper wire woven shield (5), glass fiber belt (6) and band (7), coat oversheath (8) at outermost layer then, and make oversheath (8) crosslinked with cathode beam.