CN205264396U

CN205264396U - Dosage of nai high radiation cable

Info

Publication number: CN205264396U
Application number: CN201521050374.0U
Authority: CN
Inventors: 孙琪; 凌国桢; 易蓓蓓; 潘冬雪
Original assignee: Jiangsu Shangshang Cable Group Co Ltd
Current assignee: Jiangsu Shangshang Cable Group Co Ltd
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2016-05-25
Anticipated expiration: 2025-12-15

Abstract

The utility model provides a dosage of nai high radiation cable, ab intra and include conductor, insulating layer outward, around covering and restrictive coating, the conductor has many, and every conductor wraps up the insulating layer outward, the insulating layer is that the insulated tape winds the package outside the conductor, the conductor transposition of each parcel insulating layer constitutes the cable core, the insulated tape is resistant radiation band, the outer cladding of cable core is around the covering, is filled with the stopping at the conductor of parcel insulating layer between the covering with winding, closely form around the package by the stranding band around the covering, the sheath is an embossing copper sheath. The special cable of the dosage of resistant high radiation that this technical scheme provided, its resistant radianting capacity is very strong, can use safely in high radiation's nuclear power station environment.

Description

A kind of resistance to high dose of radiation cable

Technical field

The technical program relates to cable technology field, relates in particular to the special cable that resistance to high dose of radiation is used.

Background technology

In prior art, general rdaiation resistant cable be XLPO the insulation such as EPR, it is aging that these insulation modes are very easy to occur in high dose of radiation situation, the phenomenons such as cracking, cause cable to break down, and greatly reduce the service life of cable. How making the cable can be the in the situation that of high dose of radiation, ensure that cable security operation reliably and miscellaneous equipment are not damaged, be the problem of needing solution badly.

Summary of the invention

In order to solve the aforementioned problems in the prior, the invention has proposed a kind of resistance to high dose of radiation cable, and its radiation resistance is superior, can under the condition of high dose of radiation, use, and the technical program is as follows:

A kind of resistance to high dose of radiation cable, its structure is: from-inner-to-outer comprises conductor, insulating barrier, lapping layer and restrictive coating; Described conductor has many, every conductor outer wrapping insulating barrier; Insulating barrier is that insulating tape is wrapped outside conductor; The stranded formation cable core of conductor of each wrap insulate layer; This insulating tape is radiation hardness band; Cable core outer cladding lapping layer is filled with inserts between the conductor of wrap insulate layer and lapping layer; Lapping layer is by closely wrapped forming of stranding band; Sheath is embossing copper sheath.

Radiation hardness band is polyimides band, and the rate of putting up is 25%～30%, and being preferably the rate of putting up is 25%. (width specifications of radiation hardness band is selected according to wire gauge, such as little wire gauge lattice are chosen as thickness 0.15mm × width 10mm).

Stranding band material is nonwoven; The on average rate of putting up of lapping layer is not less than 25%, and minimum is put up width and is not less than 5mm.

The width specifications of stranding band is used and selects according to reality, and for example specification is: thickness 0.1mm × width 20mm～thickness 0.3mm × width 80mm.

Described inserts is the dustless mineral wool rope of closely filling. (the dustless mineral wool rope of optional diameter 0.2mm).

Described embossing copper sheath is made up of copper strips welding, and the width of copper strips is: before sheath, the girth of cable core adds the embossing degree of depth of twice, then adds the copper strips thickness of twice.

The rate of putting up that it is characterized in that described radiation hardness band and stranding band is all 25%.

Insulating barrier outside each conductor of this cable is coated nonmetal twining package tape, increases insulation radiation resistance, does not occur the situation of insulation and conductor adhesion, has strengthened its mechanical performance. Embossing copper sheath has not only improved the protective effect of sheath but also played certain radiation resistance, simultaneously environment friendly and pollution-free, makes cable electric property in high dose of radiation situation stable, and ageing resistace is superior, long service life.

Through test, compared with prior art, the cable of this structure is in adopting and meeting radiation hardness dosage after the radiation hardness lapping layer of specific materials and reach 4Mrad/h, and its mechanical performance, electrical property, ageing properties etc. obviously do not reduce.

Brief description of the drawings

Fig. 1 is the cable radial section schematic diagram of specific embodiment;

In figure: conductor 1, insulating barrier 2, lapping layer 3, restrictive coating 4, inserts 5.

Detailed description of the invention

The technical program is further illustrated as follows below in conjunction with accompanying drawing and detailed description of the invention:

A kind of resistance to high dose of radiation cable, from-inner-to-outer comprises conductor, insulating barrier, lapping layer and restrictive coating; Described conductor has many, every conductor outer wrapping insulating barrier; Insulating barrier is that insulating tape is wrapped outside conductor; The stranded formation cable core of conductor of each wrap insulate layer; This insulating tape is radiation hardness band; Cable core outer cladding lapping layer is filled with inserts between the conductor of wrap insulate layer and lapping layer; Lapping layer is by closely wrapped forming of stranding band. Sheath is embossing copper sheath. Described inserts is the dustless mineral wool rope of closely filling. Described embossing copper sheath is made up of copper strips welding.

In this example, radiation hardness band is polyimides band, and the rate of putting up is 25%～30%, and being preferably the rate of putting up is 25%. (width specifications of radiation hardness band is selected according to wire gauge, such as little wire gauge lattice are thickness 0.15mm × width 10mm).

Each conductor adopts the many stranded conductors of making of soft circular copper wire, the outside coated insulation layer of conductor. Insulating barrier adopts tight wrapped type belt. Each insulated wire cores is twisted into cable core, then lapping layer. Lapping layer is tightly strapped in each insulated wire cores together, and cable core has been carried out to stable processing. Adopt embossing copper sheath coated outward at lapping layer. Copper sheath had both improved sheath protective effect, had played again radiation resistance.

In this routine construction of cable, conductor, by stranded 2 classes that form of common monofilament or 5 class conductors, meets GB requirement. Insulating barrier is by closely wrapped forming of radiation hardness band, and insulaion resistance meets GB requirement. Packing material is dustless mineral wool rope, and filling should be tight. The lapping layer of twining package tape should be closely, rounding. Sheath adopts copper strips welding.

The function of this cable, the detection data of performance are as follows:

1 physical dimension

Conductor structure: the conductor standard that meets GB/T3956 cable;

Insulation system: insulation thickness control range (0.68～2.62) mm;

Jacket thickness: jacket thickness control range (0.38～0.70) mm;

Cable ovality: control range (0～3) %.

2 voltage tests

Cable conductor and conductor, apply the voltage of (1.25～3.5) kV between conductor and sheath, the duration is 15min at least, and cable can not puncture.

3 insulaion resistances

Under normal temperature, the product of insulaion resistance and cable length is greater than 100M Ω km.

4 bend tests

Cable is through specific bending radius, and forward and reverse bending 180 °, number of repetition (1～2) is inferior. Jacket surface flawless, bending rear cable is through the voltage test of (1.25～3.5) kV, and cable is without puncturing.

Voltage test after 5 irradiation

After cable irradiation, through the voltage test of (1.25～3.5) kV, cable is without puncturing.

This routine cables manufacturing step comprises:

1, conductor: cable conductor adopts conductor to meet 2 classes or 5 class conductors that GB/T3956 requires, and conductor forms by monofilament is stranded, and structure meets GB requirement.

2, insulation: insulating barrier adopts wrapped form to produce. Undertaken by a kind of radiation hardness band overlapping wrapped, wrapped should be tight, the rate of putting up is not less than 25%. After wrapped, shall be rounded up, docile, tight, without the defect such as bottom pour ladle, fold.

3, stranding: stranding is pressed certain orientation, the control of stranding lay ratio is 25-35. Adopt dustless mineral wool rope to fill, filling should be tight, the outer overlapping wrapped tight type belt of cable core. On average the rate of putting up is not less than 25%, and minimum is put up width and is not less than 5mm.

4, embossing copper sheath: sheath, according to different wire gauges, is selected the copper strips of suitable thickness and width, and select certain the embossing degree of depth and pitch to weld.

Claims

1. a resistance to high dose of radiation cable, is characterized in that from-inner-to-outer comprises conductor, insulating barrier, lapping layer and restrictive coating;

Described conductor has many, every conductor outer wrapping insulating barrier; Insulating barrier is that insulating tape is wrapped outside conductor; The stranded formation cable core of conductor of each wrap insulate layer; This insulating tape is radiation hardness band;

Cable core outer cladding lapping layer is filled with inserts between the conductor of wrap insulate layer and lapping layer; Lapping layer is by closely wrapped forming of stranding band;

Sheath is embossing copper sheath.

2. resistance to high dose of radiation cable according to claim 1, is characterized in that radiation hardness band is polyimides band, and the rate of putting up is 25%～30%.

3. resistance to high dose of radiation cable according to claim 1, is characterized in that stranding band material is nonwoven; The on average rate of putting up of lapping layer is not less than 25%, and minimum is put up width and is not less than 5mm.

4. resistance to high dose of radiation cable according to claim 1, is characterized in that described inserts is the dustless mineral wool rope of closely filling.

5. resistance to high dose of radiation cable according to claim 1, is characterized in that the width that described embossing copper sheath forms copper strips by copper strips welding is: before sheath, the girth of cable core adds the embossing degree of depth of twice, then adds the copper strips thickness of twice.

6. resistance to high dose of radiation cable according to claim 1, the rate of putting up that it is characterized in that described radiation hardness band and stranding band is all 25%.