CN202183241U

CN202183241U - Instrument cable used for nuclear power station

Info

Publication number: CN202183241U
Application number: CN2011203084513U
Authority: CN
Inventors: 王松明; 李斌; 梁福才; 凌国桢; 于雪芳; 潘冬雪
Original assignee: Jiangsu Shangshang Cable Group Co Ltd
Current assignee: Jiangsu Shangshang Cable Group Co Ltd
Priority date: 2011-08-23
Filing date: 2011-08-23
Publication date: 2012-04-04
Anticipated expiration: 2021-08-23

Abstract

The utility model relates to an instrument cable and especially relates to an instrument cable used for a nuclear power station. The instrument cable used for the nuclear power station is composed of conductors (1) having insulation layers (2). The insulation layers (2) are extruded on the conductors (1). The quantity of the conductors (1) is at least two. At least two stranded conductors (1) having insulation layers form core wires (3-1, 3-2, 3-3). At least two core lines (3-1, 3-2, 3-3) and a filler are stranded to form cable cores (5-1, 5-2, 5-3). A cladding layer (6), a copper-plastic composite band (7), a copper wire braid layer (8) and a sheath (9) are arranged on the cable cores successively. by adopting the above technical scheme, the instrument cable used for the nuclear power station in the utility model has long-term thermal ageing resisting performance, nuclear radiation resisting performance, DBA (Design Basic Accident) resisting performance and immersion performance in DBA.

Description

The used in nuclear power station instrument cable

Technical field

The utility model relates to a kind of instrument cable, and particularly a kind of used in nuclear power station instrument cable is applicable to the signal-transmitting cable of rated voltage 300/500V, as: analog images etc., it belongs to the cable application technical field.

Background technology

AP1000 is international state-of-the-art third generation nuclear power technology.AP1000 is that single heap is arranged two loop units, and 60 years designed lives, main safety system adopts non-active design, is arranged in the containment, and containment is a double-decker, and skin is a prestressed concrete, and internal layer is a steel plate structure.

The medium-term and long-term development plan of the national nuclear power of foundation: to the year two thousand twenty, Chinese nuclear power installed capacity will account for about 7% of total installed capacity of electricity capacity, reach 7,500 ten thousand kilowatts.That is: China will approve the construction of six million kilowatt nuclear power units every year at least, finally build up 30 nuclear power stations again.These nuclear power stations will adopt the AP1000 technology comprehensively.

To the AP1000 technology, its supporting instrument cable requires to possess the useful life more than 60 years, and has long-term submergence and the high insulating property of low cigarette, Halogen, fire-retardant, anti-long term heat ageing, anti-nuclear radiation, anti-DBA (design basis accident) and DBA.

Chinese patent notification number CN201820470U openly examines a grade cable; Comprise some mutual stranded copper conductors and halogen-free polyolefin sheath; Every copper conductor outer surface extrudes the cable core of crosslinked polyetylene insulated layer and low smoke, zero halogen polyolefin insulation layer formation successively, and every cable core all is provided with first oxygen barrier layer outward, and all cable cores are surrounded by second oxygen barrier layer outward jointly; Be provided with inserts between first oxygen barrier layer that every cable core is outer and second oxygen barrier layer, said sheath is arranged on second oxygen barrier layer outside.It is mainly not enough: first oxygen barrier layer and second oxygen barrier layer all adopt low smoke, zero halogen polyolefin twining package tape and copper strips twining package tape, and capability of resistance to radiation is general, and the life-span is general.

Chinese patent notification number CN2888606Y discloses a kind of used in nuclear power station cable; It comprises heart yearn, lapping layer and the sheath etc. of the existing used in nuclear power station construction of cable; Wherein heart yearn is to be made up of the outer extruded insulation layer of conductor; Insulating barrier adopts two-layer composite, and its internal layer is a crosslinked polyethylene insulation material, and its skin is the halogen-free and low-smoke flame-retardant polyolefin material.It is mainly not enough: unshielded layer, and capability of resistance to radiation is general, and the life-span is general.

Summary of the invention

The purpose of the utility model is the deficiency to prior art, and the extraordinary used in nuclear power station instrument cable of submergence performance behind a kind of anti-long term heat ageing performance, anti-nuclear radiation performance, anti-DBA and the DBA is provided.

For realizing above-mentioned technical purpose, the utility model adopts following technical scheme: a kind of used in nuclear power station instrument cable is made up of the conductor of tape insulation layer; Insulating barrier is extruded on the conductor; Said conductor is at least two, and the conductor of at least two stranded tape insulation layers constitutes heart yearn, and at least two heart yearns and filling are twisted into cable core; Cable core is provided with lapping layer, compound copper-plastics band, copper wire braid and sheath outward successively; The wrapped cable core of lapping layer, the outer wrapped compound copper-plastics band of lapping layer, the copper wire braid extrudes sheath outward.

Further, said conductor is 2～4 stranded conductors; Said heart yearn is 2～4 heart yearns.

Further, said conductor is the tinned copper wire conductor after stranded.

Further, said filling is a low-smoke halogen-free flame retardant filler strip.

Further, said copper wire braid is a tincopper fuse wire braided armor.

Further, said insulating barrier is the low flue unhalogen flame-retarded ethylpropyl rubber layer of vapor crosslinking.

Further, said sheath is the low-smoke non-halogen flame-retardant thermoset rubber sheath of vapor crosslinking.

After adopting technique scheme, the utlity model has following beneficial effect:

(1) heart yearn and cable core all adopt lay configuration, and it is easy to process, and stranded cable core is firm.Every conductor tyre insulating barrier, the insulating properties of raising cable.Compound copper-plastics band and copper wire braid improve the shielding of whole cable, capability of resistance to radiation grow.

(2) conductor in the heart yearn is 2～4 stranded conductors, and the heart yearn in the cable core is 2～4 heart yearns, further makes cable core easy to process, stranded firm.

(3) the tinned copper wire conductor after stranded improves the electric conductivity of conductor, makes conductor soft and not fragile.

(4) low-smoke halogen-free flame retardant filler strip, low-smoke halogen-free flame-retardant isolating layer and low-smoke halogen-free flame-retardant sheath make that cable low-smoke non-halogen flame-retardant performance is better.

(5) tincopper fuse wire braided armor, anti-oxidant, the life-span is longer, and is more not fragile, it is strong with the aging ability of sheath to prevent to insulate, the capability of resistance to radiation grow.

(6) insulating barrier of vapor crosslinking makes the insulating properties of cable stronger.

(7) the thermoset rubber sheath makes the anti-nuclear radiation of cable, anti-DBA, anti-long term heat ageing, improves cable useful life.Vapor crosslinking makes insulating properties better, and other performance is better.

(8) ethylene propylene rubber insulated layer, thermoset rubber sheath make cable more flexible, more convenient be suitable for the narrow and small zone of nuclear power station and use.

Submergence performance behind the anti-long term heat ageing performance of the utility model, anti-nuclear radiation performance, anti-DBA and the DBA is good especially.

Description of drawings

Fig. 1 is structure one sketch map of the utility model;

Fig. 2 is structure two sketch mapes of the utility model;

Fig. 3 is structure three sketch mapes of the utility model.

Among the figure: 1, conductor, 2, insulating barrier, 3-1, heart yearn A, 3-2, heart yearn B, 3-3, heart yearn C, 4, fill, 5-1, cable core A, 5-2, cable core B, 5-3, cable core C, 6, lapping layer, 7, compound copper-plastics band, 8, copper wire braid, 9, sheath.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

Embodiment one

As shown in Figure 1, a kind of used in nuclear power station instrument cable comprises by two heart yearn A3-1 becoming cable core A5-1 with filling 4 pair twists.Every heart yearn A3-1 is made up of two conductors 1 that contain insulating barrier 2 of pair twist, and insulating barrier 2 is extruded on the conductor 1.Cable core A5-1 is provided with lapping layer 6, compound copper-plastics band 7, copper wire braid 8 and sheath 9 outward successively.Lapping layer 6 wrapped cable core A5-1, lapping layer 6 outer wrapped compound copper-plastics bands 7, the copper wire braid 8 outer sheaths 9 that extrude.

Wherein: conductor 1 adopts the tinned copper wire lay configuration.Fill 4 preferred low-smoke halogen-free flame retardant filler strips.Copper wire braid 8 preferred tincopper fuse wire braided armors.Insulating barrier 2 preferred low flue unhalogen flame-retarded ethylpropyl rubber layers, it adopts vapor crosslinking.Sheath 9 preferred low-smoke non-halogen flame-retardant thermoset rubber sheaths, it adopts vapor crosslinking.

Heart yearn A3-1 and cable core A5-1 all adopt the pair twist structure, and it is easy to process, and stranded cable core is firm.

The shielding of compound copper-plastics band 7 and copper wire braid 8 raising cables, the capability of resistance to radiation grow.Copper wire braid 8 preferred tincopper fuse wire braided armors, anti-oxidant, the life-span is longer, and is more not fragile, it is strong with the aging ability of sheath to prevent to insulate, the capability of resistance to radiation grow.Adopt the conductor of tinned copper wire lay configuration, improve the electric conductivity of conductor, make conductor soft and not fragile.

Low-smoke halogen-free flame retardant filler strip improves cable low-smoke non-halogen flame-retardant performance.

Embodiment two

As shown in Figure 2, a kind of used in nuclear power station instrument cable comprises by four heart yearn B3-2 becoming cable core B5-2 with filling 4 star quad strandings.Every heart yearn B3-2 is made up of two conductors 1 that contain insulating barrier 2 of pair twist, and insulating barrier 2 is extruded on the conductor 1.Cable core B5-2 is provided with lapping layer 6, compound copper-plastics band 7, copper wire braid 8 and sheath 9 outward successively.Lapping layer 6 wrapped cable core B5-2, lapping layer 6 outer wrapped compound copper-plastics bands 7, the copper wire braid 8 outer sheaths 9 that extrude.

Four heart yearn B3-2 with fill 4 star quad strandings and become cable core B5-2, guaranteeing under the constant situation of electric conductivity, make cable more firmly, more soft.

Embodiment three

As shown in Figure 3, a kind of used in nuclear power station instrument cable comprises by four heart yearn C3-3 becoming cable core C5-3 with filling 4 star quad strandings.Every heart yearn C3-3 is made up of four conductors 1 that contain insulating barrier 2 of star quad stranding, and insulating barrier 2 is extruded on the conductor 1.Cable core C5-3 is provided with lapping layer 6, compound copper-plastics band 7, copper wire braid 8 and sheath 9 outward successively.Lapping layer 6 wrapped cable core C5-3, lapping layer 6 outer wrapped compound copper-plastics bands 7, the copper wire braid 8 outer sheaths 9 that extrude.

Heart yearn C3-3 and cable core C5-3 all adopt star-quad construction, further make cable more firmly, more soft.

The utility model is except that the foregoing description, and said heart yearn 3-1,3-2,3-3 also can adopt other radical outside 2～4 heart yearns of optimization, and heart yearn 3-1,3-2,3-3 radical are selected for use as requested, can choose 20 at most surplus piece.

After adopting such scheme, all reach more than 60 years the useful life of used in nuclear power station instrument cable, and radiation resistance is good.

The utility model is not limited to the foregoing description, and the technical scheme that all employings are equal to or the equivalence replacement forms all falls into the protection range that the utility model requires.

Claims

1. used in nuclear power station instrument cable; Conductor (1) by tape insulation layer (2) constitutes; Insulating barrier (2) is extruded on the conductor (1); It is characterized in that: said conductor (1) is at least two, and the conductor (1) of at least two stranded tape insulation layers (2) constitutes heart yearn (3-1,3-2,3-3), and at least two heart yearns (3-1,3-2,3-3) and filling (4) are twisted into cable core (5-1,5-2,5-3); Outer lapping layer (6), compound copper-plastics band (7), copper wire braid (8) and the sheath (9) of being provided with successively of cable core (5-1,5-2,5-3); The wrapped cable core of lapping layer (6) (5-1,5-2,5-3), the outer wrapped compound copper-plastics band (7) of lapping layer (6), the outer sheath (9) that extrudes of copper wire braid (8).

2. used in nuclear power station instrument cable according to claim 1 is characterized in that: said conductor (1) is 2～4 stranded conductors (1); Said heart yearn (3-1,3-2,3-3) is 2～4 heart yearns (3-1,3-2,3-3).

3. used in nuclear power station instrument cable according to claim 1 and 2 is characterized in that: said conductor (1) is the tinned copper wire conductor after stranded.

4. used in nuclear power station instrument cable according to claim 1 and 2 is characterized in that: said filling (4) is a low-smoke halogen-free flame retardant filler strip.

5. used in nuclear power station instrument cable according to claim 1 and 2 is characterized in that: said copper wire braid (8) is a tincopper fuse wire braided armor.

6. used in nuclear power station instrument cable according to claim 1 and 2 is characterized in that: said insulating barrier (2) is the low flue unhalogen flame-retarded ethylpropyl rubber layer of vapor crosslinking.

7. used in nuclear power station instrument cable according to claim 1 and 2 is characterized in that: said sheath (9) is the low-smoke non-halogen flame-retardant thermoset rubber sheath of vapor crosslinking.