CN201383373Y - Radiation-resistance low-voltage power cable used for nuclear power station - Google Patents
Radiation-resistance low-voltage power cable used for nuclear power station Download PDFInfo
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- CN201383373Y CN201383373Y CN200920080110U CN200920080110U CN201383373Y CN 201383373 Y CN201383373 Y CN 201383373Y CN 200920080110 U CN200920080110 U CN 200920080110U CN 200920080110 U CN200920080110 U CN 200920080110U CN 201383373 Y CN201383373 Y CN 201383373Y
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Abstract
The utility model discloses a radiation-resistance low-voltage power cable used for a nuclear power station. The power cable comprises a cable conductor and an external jacket, wherein the cable conductor at least is formed by twisting a plurality of main line cores; the main line core comprises a conductor, an internal insulation layer outside the conductor, and an external insulation layer outside the internal insulation layer; the external jacket comprises an internal jacket layer, an external jacket layer and a steel band lapping layer between the internal jacket layer and the external jacket layer; and an isolated layer is arranged between the cable conductor and the external jacket. The power cable can meet the utilization requirements on high insulativity and high flame retarding of the nuclear cable, can resist radiation, has good flame retarding and can resist electromagnetic induction, imperfect earth and power line conducted interference, thereby reducing inductance and preventing the induced electromotive force from being too big.
Description
Technical field
The utility model relates to a kind of cable, particularly a kind of radiation-resistant lv power cable that mainly uses at nuclear power station.
Background technology
The nuclear power station environment for use requires the used in nuclear power station cable to have high electrical performance, high flame retardant and radiation resistance.At present the insulating barrier of normal cable is a single structure, when it will possess high electrical performance, to other performance of insulation particularly fire resistance will not examine; When it will possess the anti-flammability requirement, there is not extra high examination requirement in the electric property that insulate yet.Common power cable is used under the radiation environment, and insulation and sheath material aging speed are very fast, have reduced the useful life of cable to a great extent, and have influenced the cable safety in utilization.The used in nuclear power station cable then requires cable to have high-insulativity, high flame retardant and radioresistance, and it must guarantee to possess anti-flammability and the radioresistance that adapts under the nuclear power operational environment under the situation of high insulation resistance simultaneously again.And these two kinds of performances all condition each other on commaterial, can not simultaneously good anti-flammability be arranged again under the situation of high insulation resistance, also can not under the situation of excellent flame-retardant performance extra high insulation resistance be arranged; Though material circle personage both domestic and external has also done the wide variety of materials research work for this reason, but the stabilizing material that possesses these two kinds of performances simultaneously and meet nuclear power standard needs also can not put goods on the market so far, attempt with the pattern of the single structure technology of simplifying working process with the low-smoke non-halogen flame-retardant cross-linking radiation polyolefine material of present domestic optimum, but its finished product insulation resistance constant value is swung between qualified and defective still, therefore, be difficult to guarantee the stability of the electrical insulation properties of product with homogenous material.
The utility model content
The purpose of this utility model is to be to overcome the problems referred to above that existing used in nuclear power station cable exists, a kind of radioresistance low pressure power cable for nuclear power plant is provided, the utility model can satisfy the use of nuclear cables high-insulativity and high flame retardant to be wanted, can anti-irradiation, good flame resistance, and can anti-electromagnetic induction, imperfect earth and power line conducted interference, reduce inductance, prevent that induced electromotive force is excessive.
The technical solution of the utility model comprises following content:
A kind of radioresistance low pressure power cable for nuclear power plant, comprise cable core and oversheath, it is characterized in that: described cable core is at least by many stranded formation of master core, master core comprises conductor, outer inner insulating layer and the outer external insulation layer of inner insulating layer of conductor, oversheath comprise inner restrictive coating, external sheath layer and be arranged on inner restrictive coating and external sheath layer between the steel band lapping layer, be provided with separator between cable core and the oversheath.
The utility model also comprises the ground core, and the ground core comprises conductor, outer inner insulating layer and the outer external insulation layer of inner insulating layer of conductor, the stranded formation cable core of ground core and Duo Gen master core.
Described ground core sectional area is less than master core.
Described inner insulating layer is the IXPE layer, and external insulation layer is a low-smoke non-halogen flame-retardant cross-linking radiation polyolefin layer.
Described separator comprises extruding low smoke and zero halogen high filling flame-retardant mixture and extruding the low smoke and zero halogen height fills the outer wrapped Halogen band of flame-retardant mixture.
Described inner restrictive coating is the halogen-free low-smoke flame retardant material layer.
Described steel band lapping layer is the wrapped armours in two steel band gaps.
Described external sheath layer is for extruding low-smoke halogen-free flame-retardant thermoplastic polyolefin layer or low-smoke non-halogen flame-retardant crosslinked polyolefin layer.
Adopt advantage of the present utility model to be:
One, compares with common power cable and have very high insulating properties and anti-flammability, insulating barrier adopts the IXPE of high-insulativity and the double-deck disposable structure of extruding of cross-linking radiation polyolefin of high flame retardant, has guaranteed the high-insulativity and the high flame retardant of used in nuclear power station cable; Guaranteed whole cable fire resistance and good insulating resistance value, after tested during 20 ℃ of finished cable insulating resistance values 〉=3000M Ω km, in the time of 90 ℃ 〉=3M Ω km.
Two, compare with common power cable and have good radioresistance; testpieces is subjected to behind the 251kGy60Co gamma-ray irradiation no abnormal respectively; separator between cable core and external sheath layer; has the low-smoke non-halogen flame-retardant performance; effectively protect cable core and insulated wire cores; isolate the injury of outer bound pair insulated wire cores, and greatly improved the anti-flammability of cable.Between inner restrictive coating and external sheath layer, designed high magnetic conduction steel band lapping layer, played good magnetic conduction effect, effectively controlled extraneous electromagnetic interference, when disturbing appears in circuit, the load that produces is derived by earth connection and core screen, cable itself is not produced any influence, guaranteed cable normally operation in noiseless environment, guaranteed the safe operation of testing equipment, the reliability of equipment and the accuracy of measurement data have been improved, and the steel band lapping layer has good anti-mechanical stress, also can be used as the armature of cable layer.
Three, the utility model can anti-irradiation, good flame resistance, and can anti-electromagnetic induction, imperfect earth and power line conducted interference, reduce inductance, prevent that induced electromotive force is excessive, in addition, high magnetic conduction steel band screen is arranged between interior external sheath layer, played good magnetic conduction effect and anti-mechanical stress effect, improved the reliability of equipment and the accuracy of measurement data, the also corresponding life-span of improving cable.
Description of drawings
Fig. 1 is a cross section structure schematic diagram of the present utility model
Among the figure: 1, master core, 2, conductor, 3, inner insulating layer, 4, external insulation layer, 5, filler, 6, separator, 7, inner restrictive coating, 8, the steel band lapping layer, 9, external sheath layer.
Embodiment
Embodiment 1
A kind of radioresistance low pressure power cable for nuclear power plant, comprise cable core and oversheath, cable core is by three master cores, 1 stranded formation, master core 1 comprises conductor 2, conductor 2 inner insulating layer 3 and inner insulating layer 3 external insulation layer 4 outward outward, oversheath comprise inner restrictive coating 7, external sheath layer 9 and be arranged on inner restrictive coating 7 and external sheath layer 9 between steel band lapping layer 8, be provided with separator 6 between cable core and the oversheath.
In the utility model, master core 1 can be 1～5 core, when master core 1 cross section during greater than 35mm2, can adopt the sector conductor structure.Insert high flame retardant material filler 5 in the space between master core 1.Inner insulating layer 3 is the IXPE layer, and external insulation layer 4 is a low-smoke non-halogen flame-retardant cross-linking radiation polyolefin layer, and what the utility model adopted is the double-deck disposable structure of extruding.Separator 6 comprises extruding low smoke and zero halogen high filling flame-retardant mixture and extruding the low smoke and zero halogen height fills the outer wrapped Halogen band of flame-retardant mixture.Inner restrictive coating 7 is the halogen-free low-smoke flame retardant material layer.Steel band lapping layer 8 is the wrapped armours in two steel band gaps.External sheath layer 9 is for extruding low-smoke halogen-free flame-retardant thermoplastic polyolefin layer or low-smoke non-halogen flame-retardant crosslinked polyolefin layer.
Embodiment 2
A kind of radioresistance low pressure power cable for nuclear power plant, comprise cable core and oversheath, cable core forms by core is stranded master core 1 and ground, master core 1 quantity is greater than ground core quantity, master core 1 comprises conductor 2, conductor 2 inner insulating layer 3 and inner insulating layer 3 external insulation layer 4 outward outward, oversheath comprise inner restrictive coating 7, external sheath layer 9 and be arranged on inner restrictive coating 7 and external sheath layer 9 between steel band lapping layer 8, be provided with separator 6 between cable core and the oversheath.
The ground core comprises conductor, outer inner insulating layer and the outer external insulation layer of inner insulating layer of conductor, and a ground core and three stranded formation cable cores of master core are inserted high flame retardant material filler 5 in the space between master core, master core and ground core.Ground core sectional area is less than master core 1, and the ground wire core conductor is a circular configuration.
Certainly; the utility model is not limited to above-mentioned execution mode, can also be more such as master core in the cable core and ground core quantity, and all have based on spirit of the present utility model; and be any type of modification of the utility model or change, all belong to the category of the utility model intention protection.
Claims (8)
1, a kind of radioresistance low pressure power cable for nuclear power plant, comprise cable core and oversheath, it is characterized in that: described cable core is at least by many stranded formation of master core, master core (1) comprises conductor (2), outer inner insulating layer (3) and the outer external insulation layer (4) of inner insulating layer (3) of conductor (2), oversheath comprise inner restrictive coating (7), external sheath layer (9) and be arranged on inner restrictive coating (7) and external sheath layer (9) between steel band lapping layer (8), be provided with separator (6) between cable core and the oversheath.
2, radioresistance low pressure power cable for nuclear power plant according to claim 1, it is characterized in that: also comprise the ground core, the ground core comprises conductor, outer inner insulating layer and the outer external insulation layer of inner insulating layer of conductor, the stranded formation cable core of ground core and Duo Gen master core.
3, radioresistance low pressure power cable for nuclear power plant according to claim 2, it is characterized in that: described ground core sectional area is less than master core (1).
4, radioresistance low pressure power cable for nuclear power plant according to claim 1 and 2, it is characterized in that: described inner insulating layer (3) is the IXPE layer, and external insulation layer is a low-smoke non-halogen flame-retardant cross-linking radiation polyolefin layer.
5, radioresistance low pressure power cable for nuclear power plant according to claim 1 and 2 is characterized in that: described separator (6) comprises extruding low smoke and zero halogen high filling flame-retardant mixture and extruding the low smoke and zero halogen height fills the outer wrapped Halogen band of flame-retardant mixture.
6, radioresistance low pressure power cable for nuclear power plant according to claim 1 and 2 is characterized in that: described inner restrictive coating (7) is the halogen-free low-smoke flame retardant material layer.
7, radioresistance low pressure power cable for nuclear power plant according to claim 1 and 2 is characterized in that: described steel band lapping layer (8) is the wrapped armour in two steel band gaps.
8, radioresistance low pressure power cable for nuclear power plant according to claim 1 and 2 is characterized in that: described external sheath layer (9) is for extruding low-smoke halogen-free flame-retardant thermoplastic polyolefin layer or low-smoke non-halogen flame-retardant crosslinked polyolefin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920080110U CN201383373Y (en) | 2009-04-09 | 2009-04-09 | Radiation-resistance low-voltage power cable used for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920080110U CN201383373Y (en) | 2009-04-09 | 2009-04-09 | Radiation-resistance low-voltage power cable used for nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201383373Y true CN201383373Y (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920080110U Expired - Fee Related CN201383373Y (en) | 2009-04-09 | 2009-04-09 | Radiation-resistance low-voltage power cable used for nuclear power station |
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| Country | Link |
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| CN (1) | CN201383373Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097177A (en) * | 2011-03-11 | 2011-06-15 | 南京全信传输科技股份有限公司 | Walking power cable and preparation method thereof |
| CN102194543A (en) * | 2010-02-17 | 2011-09-21 | 日立电线株式会社 | Radiation resistant electric wire and radiation resistant cable |
| CN103617836A (en) * | 2013-12-06 | 2014-03-05 | 上海特种电线电缆（集团）有限公司 | Nanometer type super-A-class flame-retardant power cable |
| CN103928088A (en) * | 2014-03-27 | 2014-07-16 | 安徽长风电缆集团有限公司 | Fire-retardant anti-corrosion shielding control cable |
| CN106455166A (en) * | 2016-09-08 | 2017-02-22 | 芜湖市旭辉电工新材料有限责任公司 | Parallel constant power electric tracing band |
-
2009
- 2009-04-09 CN CN200920080110U patent/CN201383373Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102194543A (en) * | 2010-02-17 | 2011-09-21 | 日立电线株式会社 | Radiation resistant electric wire and radiation resistant cable |
| CN102194543B (en) * | 2010-02-17 | 2015-07-08 | 日立金属株式会社 | Radiation resistant electric wire and radiation resistant cable |
| CN102097177A (en) * | 2011-03-11 | 2011-06-15 | 南京全信传输科技股份有限公司 | Walking power cable and preparation method thereof |
| CN102097177B (en) * | 2011-03-11 | 2016-01-27 | 南京全信传输科技股份有限公司 | Traveling power cable and preparation method thereof |
| CN103617836A (en) * | 2013-12-06 | 2014-03-05 | 上海特种电线电缆（集团）有限公司 | Nanometer type super-A-class flame-retardant power cable |
| CN103928088A (en) * | 2014-03-27 | 2014-07-16 | 安徽长风电缆集团有限公司 | Fire-retardant anti-corrosion shielding control cable |
| CN106455166A (en) * | 2016-09-08 | 2017-02-22 | 芜湖市旭辉电工新材料有限责任公司 | Parallel constant power electric tracing band |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100113 Termination date: 20150409 |
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| EXPY | Termination of patent right or utility model |