CN207302663U - A kind of harsh environment lv power cable - Google Patents
A kind of harsh environment lv power cable Download PDFInfo
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- CN207302663U CN207302663U CN201721155853.8U CN201721155853U CN207302663U CN 207302663 U CN207302663 U CN 207302663U CN 201721155853 U CN201721155853 U CN 201721155853U CN 207302663 U CN207302663 U CN 207302663U
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Abstract
A kind of harsh environment lv power cable, its structure are equipped with lapping layer, inner sheath and oversheath successively for the outer from-inner-to-outer of cable core；The single or more core of the cable core is twisted composition；The core is made of the conductor and twining package tape of single tape insulation layer；Every conductor is twisted by tin-coated copper monofilament and formed；The outermost direction of lay of tin-coated copper monofilament is left-hand, remaining each layer direction is opposite；The outer lapping layer of the conductor is formed by polyamide tape dextrad is wrapped；The insulating layer is that the insulation of second third that low-smoke non-halogen flame-retardant is extruded by continuous vulcanization outside conductor is formed；The outer lapping layer of the insulation is formed by polyamide tape left-hand is wrapped；Low-smoke non-halogen flame-retardant filling rubber bar is identical with the direction of lay of core during cable core stranding；The outer lapping layer of the stranding wrapped is formed by low-smoke non-halogen flame-retardant twining package tape is overlapping；The inner sheath is formed by extruding low-smoke non-halogen flame-retardant thermosetting property EVA material outside lapping layer；The oversheath is to extrude low-smoke non-halogen flame-retardant thermosetting property protective cover material by connecting sulphur outside braiding layer to form.
Description
Technical field
A kind of harsh environment lv power cable is the utility model is related to, more particularly to a kind of harsh environment low tension
Power cable, suitable for the lv power cable of rated voltage 0.6/1kV, belongs to field of cable technology.
Background technology
Environment mainly considers LOCA accident (coolant loss accident) condition in conventional two generations nuclear power plant containment shell, now main
Stream three generations " China's dragon No.1 " technology is considered including more harsh environment such as pressure vessel ruptures.So harsh environment low pressure
Power cable needs to meet the requirement no less than 60 years service life, tolerance conventional gamma-ray irradiation, low-smoke non-halogen flame-retardant, and
Need the requirement for meeting the environment of resistance to LOCA, resistance to harsh environment at the same time.The superposition of these conditions is abnormal cruel for cable
's.
Utility model content
Technical problems to be solved
Harsh environmental conditions for such as three generations's nuclear power station are, it is necessary to solve the problems, such as 60 years insulation lifes of cable, resistance to y spoke
According to dosage 1500kGy irradiance problems, resistance to LOCA environmental problems, resistance to harsh environment problem.At the same time meet cable mechanical performance and
Environmental requirement such as low cigarette, Halogen, fire-retardant etc..
The superposition of these conditions is abnormal cruel for cable, for this reason, inventor is to cable material, process structure
Particular design is carried out, eventually through all qualification tests.
To solve the technical solution that above-mentioned technical problem uses
The utility model, which provides one kind, can meet three generations's nuclear power station harsh environment lv power cable, low-voltage power electricity
Cable disclosure satisfy that 60 years service life；It disclosure satisfy that the requirement of low-smoke non-halogen flame-retardant；Performance is stablized under high temperature or low temperature environment,
Heat-proof aging and high dosage irradiation ageing properties are excellent；Can normal use under nuclear power station harsh environment.
To realize above-mentioned technical purpose, the utility model uses following technical scheme：
A kind of harsh environment lv power cable, the external diametrical extent of cable is 15.0mm~73.3mm；Its structure is：Cable
The outer from-inner-to-outer of core is equipped with lapping layer, inner sheath and oversheath successively；The single or more core of the cable core is twisted composition, is twisted
Lay ratio be not more than 25；The core is made of the conductor and twining package tape of single tape insulation layer；Every conductor is by tin-coated copper list
Silk is twisted to be formed, conductor internal layer lay ratio scope：12~18, outer layer lay ratio scope：10~14；The diameter model of tin-coated copper monofilament
Enclose：0.32mm-3.80mm, diameter range 0.9mm~30.4mm of conductor；The outermost direction of lay of tin-coated copper monofilament is a left side
To remaining each layer direction is opposite；The outer lapping layer of the conductor is formed by polyamide tape dextrad is wrapped；The insulating layer is
The insulation of second third that low-smoke non-halogen flame-retardant is extruded by continuous vulcanization outside conductor is formed；The outer lapping layer of the insulation is by polyimides
The band wrapped composition of left-hand；Low-smoke non-halogen flame-retardant filling rubber bar is identical with the direction of lay of core during cable core stranding；The stranding
Outer lapping layer wrapped is formed by low-smoke non-halogen flame-retardant twining package tape is overlapping；The inner sheath is by extruding low smoke and zero halogen outside lapping layer
Flame-retardant thermoset EVA material is formed；The oversheath is to extrude low-smoke non-halogen flame-retardant thermosetting property protective cover material by connecting sulphur outside braiding layer
Form.
Further, the number of the conductor with insulating layer is 1~5.
Further, the outer lapping layer of the insulation is made of Kapton, and Kapton lapping direction is
Left-hand, wrapped cap rate are not less than 20%.
Further, filling is low-smoke non-halogen flame-retardant packing material.Halogen-free low-smoke flame retardant material selects low-smoke non-halogen flame-retardant rubber
Leather strap.
Further, the thickness of the insulating layer meets the requirement of GB/T 12706-2008, and the nominal thickness of insulating layer is
1.0-2.8mm.The selection low-smoke non-halogen flame-retardant ethylene-propylene rubber material that Insulation Material can be selected, such as：The electricity of model XJ-32HB
Cable Insulation Material.
Further, the nominal thickness of the low-smoke non-halogen flame-retardant twining package tape is 0.2mm；Wrapped cap rate is not less than 20%.
Further, the thickness of the inner sheath is 1.0-1.8mm.Low-smoke non-halogen flame-retardant inner sheath material can select EVA
Class material, such as：The cable jacket material of model XH-30A.
Further, the thickness of the oversheath meets the requirement of GB/T12706.1, minimum thickness 1.4mm.Low smoke and zero halogen
Flame-retardant thermoset protective cover material can select EVA class materials, such as：The cable jacket material of model XH-32HB.
Beneficial effect
After adopting the above technical scheme, the utility model has the advantages that：
(1) Cable Construction Design advantages of simple：The cored wire of more circumferential arrangements and filling are twisted into cable core, easy to process,
And twisted cable core is firm.Every conductor tyre insulating layer, lapping layer, improve the insulating properties and radiation-resistant property of cable.Increase
Cable not only increases cable radiation resistance and also reduces insulated wire cores flattening after Kapton lapping layer
Risk.And whole cable core processing is more convenient, cable core more rounding.
(2) stranded tinned copper conductor, improves the electric conductivity of conductor, makes conductor more resistant to corrosion, it is possible to reduce copper oxygen
Change (copper and the oxygen reflection generation CuO and Cu in air2O generation).
(3) low-smoke non-halogen flame-retardant rubber bar, can fit closely core, and irregular shape is deformed into gap, so that
Cable core more rounding so that cable low-smoke non-halogen flame-retardant performance is more preferable.
(4) low-smoke non-halogen flame-retardant thermosetting property sheath makes the resistance to nuclear radiation of cable, resistance to long term heat ageing, resistance to harsh environment, more can
Improve cable service life.Ensure that cable life reaches 60 years.
(5) low-smoke non-halogen flame-retardant ethylene-propylene rubber insulated layer, low-smoke non-halogen flame-retardant EVA thermosetting property sheaths make the construction of cable more
Softness, minimum bending radius can reach 6 times of outside diameters of cable, more flexible, be more convenient and suitable for narrow and small area in nuclear power plant containment shell
Domain uses.
(6) the utility model cable, conductor service life under 90 DEG C of hot conditions is 60 years, can be with the nuclear power station of resistance to three generations
Harsh environment in containment.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model.
In figure：1st, conductor, the 2.1, first lapping layer, the 2.2, second lapping layer, 3, insulating layer, the 4, the 3rd lapping layer, 5, fill out
Fill, 6, inner sheath, 7, oversheath.
Embodiment
As shown in Figure 1, a kind of harsh environment lv power cable, its structure are：The external diametrical extent of cable is 15.0mm
~73.3mm；
The outer from-inner-to-outer of cable core is equipped with the 3rd lapping layer, inner sheath and oversheath successively；
The cable core is formed by more cores and filling are twisted, and twisted lay ratio is not more than 25；Each core is around same
One axis, a filling is equipped with axial location；A filling (i.e. gasket for packing) is equipped between adjacent core；
The structure of any core is：Wrapped first lapping layer outside single conductor, then wrap up insulating layer, last wrapped the
Two lapping layers；
The conductor is twisted by tin-coated copper monofilament and formed, and the tin-coated copper monofilament of conductor internal layer is twisted lay ratio scope：12~
18, the tin-coated copper monofilament of conductor outer layer is twisted lay ratio scope：10~14；The diameter range of tin-coated copper monofilament：0.32mm~
3.80mm；Diameter range 0.9mm~30.4mm of conductor；The direction of lay of outermost tin-coated copper monofilament is left-hand, adjacent layer
Tin-coated copper monofilament direction of lay it is opposite；
First lapping layer is formed by polyamide tape dextrad is wrapped；
The insulating layer is that the third Insulation Material of second that low-smoke non-halogen flame-retardant is extruded by continuous vulcanization is formed；
Second lapping layer is formed by polyamide tape left-hand is wrapped；
The single filling is that have more low-smoke non-halogen flame-retardant filling rubber bars to be twisted composition, and more low-smoke non-halogen flame-retardants are filled out
The direction of lay for filling rubber is identical with the direction of lay of core；
3rd lapping layer be by low-smoke non-halogen flame-retardant twining package tape it is overlapping it is wrapped form, lapping direction and the cable core side of being twisted
To opposite；
The inner sheath is formed by extruding low-smoke non-halogen flame-retardant thermosetting property EVA material；
The oversheath is to extrude low-smoke non-halogen flame-retardant thermosetting property protective cover material by continuous vulcanization to form.
In this example, there is following particular requirement：
The number of the core is 1~5；
The width of the polyamide tape of first lapping layer is 10mm, and wrapped cap rate is no less than 20%；
The nominal thickness of insulating layer is 1.0~2.8mm；
The width of the polyamide tape of second lapping layer is 15~25mm, and wrapped cap rate is not less than 20%；
A diameter of 2.0mm~8.0mm of single filling.
The nominal thickness of the low-smoke non-halogen flame-retardant twining package tape of 3rd lapping layer is 0.2mm, and wrapped cap rate is not less than
20%；
The thickness of the inner sheath is 1.0~1.8mm；
The thickness of the oversheath meets the requirement of GB/T12706.1, and the minimum thickness of oversheath is 1.4mm.
After using the above scheme, this harsh environment reaches more than 60 years with the service life of lv power cable, bendability
Energy is good, anti-high radiation property is good, processing performance is good, can be with the environment of resistance to LOCA, the harsh environment of resistance to nuclear power station.And meet at the same time low cigarette,
Halogen, fire-retardant basic demand.
After testing, the function of the cable of this example, performance indicator such as following table：
Claims (4)
- A kind of 1. harsh environment lv power cable, it is characterized in that structure is：The external diametrical extent of cable be 15.0mm~ 73.3mm；The outer from-inner-to-outer of cable core is equipped with the 3rd lapping layer, inner sheath and oversheath successively；The cable core is formed by more cores and filling are twisted, and twisted lay ratio is not more than 25；Each core surrounds same axis Line, a filling is equipped with axial location；A filling is equipped between adjacent core；The structure of any core is：Wrapped first lapping layer outside single conductor, then wrap up insulating layer, last wrapped second around Covering；The conductor is twisted by tin-coated copper monofilament and formed, and the tin-coated copper monofilament of conductor internal layer is twisted lay ratio scope：12~18, lead The tin-coated copper monofilament of volume surrounding is twisted lay ratio scope：10~14；The diameter range of tin-coated copper monofilament：0.32mm~3.80mm； Diameter range 0.9mm~30.4mm of conductor；The direction of lay of outermost tin-coated copper monofilament is left-hand, the tin-coated copper of adjacent layer The direction of lay of monofilament is opposite；First lapping layer is formed by polyamide tape dextrad is wrapped；The insulating layer is that the third Insulation Material of second that low-smoke non-halogen flame-retardant is extruded by continuous vulcanization is formed；Second lapping layer is formed by polyamide tape left-hand is wrapped；The single filling is that have more low-smoke non-halogen flame-retardant filling rubber bars to be twisted composition, and more low-smoke non-halogen flame-retardants fill rubber The direction of lay of skin is identical with the direction of lay of core；3rd lapping layer be by low-smoke non-halogen flame-retardant twining package tape it is overlapping it is wrapped form, lapping direction and cable core direction of lay phase Instead；The inner sheath is formed by extruding low-smoke non-halogen flame-retardant thermosetting property EVA material；The oversheath is to extrude low-smoke non-halogen flame-retardant thermosetting property protective cover material by continuous vulcanization to form.
- 2. harsh environment lv power cable according to claim 1, it is characterized in that the number of the core is 1~5 Root；The width of the polyamide tape of first lapping layer is 10mm, and wrapped cap rate is no less than 20%；The nominal thickness of insulating layer is 1.0~2.8mm；The width of the polyamide tape of second lapping layer is 15~25mm, and wrapped cap rate is not less than 20%.
- 3. harsh environment lv power cable according to claim 1, it is characterized in that a diameter of 2.0mm of single filling ~8.0mm.
- 4. harsh environment lv power cable according to claim 1, it is characterized in that the low cigarette of the 3rd lapping layer The nominal thickness of halogen-free flameproof twining package tape is 0.2mm, and wrapped cap rate is not less than 20%；The thickness of the inner sheath is 1.0~1.8mm；The minimum thickness of the oversheath is 1.4mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721155853.8U CN207302663U (en) | 2017-09-11 | 2017-09-11 | A kind of harsh environment lv power cable |
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| CN201721155853.8U CN207302663U (en) | 2017-09-11 | 2017-09-11 | A kind of harsh environment lv power cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111430081A (en) * | 2020-05-14 | 2020-07-17 | 朱永松 | Special cable for harsh environment |
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2017
- 2017-09-11 CN CN201721155853.8U patent/CN207302663U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111430081A (en) * | 2020-05-14 | 2020-07-17 | 朱永松 | Special cable for harsh environment |
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