CN106207889A - A kind of crosslinked polyethylene midium voltage cable insulation breakdown strengthens the method repaired - Google Patents
A kind of crosslinked polyethylene midium voltage cable insulation breakdown strengthens the method repaired Download PDFInfo
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- CN106207889A CN106207889A CN201610778706.XA CN201610778706A CN106207889A CN 106207889 A CN106207889 A CN 106207889A CN 201610778706 A CN201610778706 A CN 201610778706A CN 106207889 A CN106207889 A CN 106207889A
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- cable
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- crosslinked polyethylene
- conductor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/16—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for repairing insulation or armouring of cables
Abstract
The invention discloses a kind of crosslinked polyethylene midium voltage cable insulation breakdown and strengthen the method repaired, it comprises the following steps: S1, scratch annular incision of 10 ~ 15cm at the ring disc of cable, and the degree of depth is close to conductor (1)；S2, section being whittled into cutter dumbbell shape, 10 ~ 15cm is exposed at middle conductor (1) position, uses special steel knife repairing slope (6), after slowly cut smooth with the sheet glass of 2mm, it is desirable to without wedge angle burr, and expose internal shield (2)；S7, at copper strips thick for the wrapped one layer of 0.1mm of outermost layer half lap；S8, baking copper strips, main concentration toasts edge repair part；S9, conductor thread core two ends after repair irrigate nano-high molecule repair liquid by adapter.The invention has the beneficial effects as follows: restorative procedure is simple, reliable, repair insulation harm by strengthening, can effectively utilize and scrap cable, promote the insulating properties of cable, reduce cable body probability of malfunction, be greatly promoted cable system stable operation.
Description
Technical field
The present invention relates to the technical field repaired after crosslinked polyethylene midium voltage cable punctures, particularly a kind of crosslinked polyethylene
Midium voltage cable insulation breakdown strengthens the method repaired.
Background technology
At present, along with China's extensive urban network restructuring in recent years, insulate as representative with crosslinked polyethylene midium voltage cable
Polymer insulation power cable is widely used in China.Although the manufacturing process of cable is greatly improved, but in the system of cable
Make, construct and running the most inevitably produces some microdefects, dispatch from the factory in experimentation, will lure at microdefect
Generating branch, under the effect of overvoltage, will cause cable insulation body to puncture.For reducing raw material wave in cable production process
Taking, the recycling puncturing cable in delivery test is cable manufacturing enterprise urgent problem.
Crosslinked polyethylene midium voltage cable medium-pressure power cable is cables with extruded insulation, uses three-layer co-extruded by interior semiconductive
Layer, insulating barrier, outer semiconducting layer are extruded around cable core.After twisted polyethylene cable punctures, breakdown channel carbonization, puncture event
Barrier is unrepairable.The cable section punctured cannot be continuing with.This project is by removing inside and outside half near breakdown point
Conductive layer, insulating barrier etc., expose cable core, semi-conductive layer, insulating barrier, outer semiconducting layer etc. in then again wrapping up around cable core
Carry out the insulation recovery of cable, finally by adapter, under pressure nano-high molecule insulation is strengthened liquid from cable core table
Face is injected cable and is penetrated into insulating barrier again.The method simple process, can effectively utilize and scrap cable；After reparation, product electric property obtains
To significant increase, meet product technology requirement.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of repair that step is few, repair easily, can be effective
Utilization scrap cable, can improve residue insulating performance of cable, reduce cable body probability of malfunction, to be greatly promoted cable system steady
The fixed crosslinked polyethylene midium voltage cable insulation breakdown run strengthens the method repaired.
The purpose of the present invention is achieved through the following technical solutions: a kind of crosslinked polyethylene midium voltage cable insulation breakdown strengthens
The method repaired, it comprises the following steps:
S1, scratching annular incision of 10 ~ 15cm at the ring disc of cable, the degree of depth is close to conductor；
S2, section being whittled into cutter dumbbell shape, 10 ~ 15cm is exposed at middle conductor position, is repairing the special steel knife of slope,
Slowly cut smooth with the sheet glass of 2mm afterwards, it is desirable to without wedge angle burr, and expose internal shield；
S3, with interior screen material pressing ring conductor, merge seam with blowing hot wind, and equating be whole；
S4, with insulating tape be wound around repair insulating barrier the most overlapping wrapped, electricity consumption should be made time wrapped to blow
Wind distance mend 1m mono-blow-through；
S5, insulating barrier are wound around with plastic double-layer band wide for 40 ~ 50cm after winding again；
S6, by the overlapping wrapped repairing section of low-smoke non-halogen flame-retardant band；
S7, at copper strips thick for the wrapped one layer of 0.1mm of outermost layer half lap；
S8, baking copper strips, main concentration toasts edge repair part；
S9, toast 1min every time, dry in the air 10 minutes；Baking 4-5 time repeatedly；
S10, adapter is installed at cable two ends, under the influence of air pressure, repair liquid gap around cable core is entered cable,
Repair liquid also penetrates into insulating barrier, to improve the insulating properties of whole cable, finally achieves in breakdown crosslinked polyethylene and presses
The reparation of cable.
Described repair liquid is nano-macromolecule material, has high osmosis.
The invention have the advantages that the present invention can effectively utilize scrap cable, can improve residue insulating performance of cable, subtract
Lack cable body probability of malfunction, be greatly promoted cable system stable operation.
Accompanying drawing explanation
Fig. 1 is crosslinked polyethylene midium voltage cable core sectional view；
Fig. 2 is the core sectional view after repairing；
Fig. 3 is the structural representation opening insulation slope；
Fig. 4 is the structural representation after repairing；
Wherein, 1-conductor, 2-internal shield, 3-insulating barrier, 4-external shielding layer, 5-repair liquid reinforced insulation layer, 6-repairs slope
Face, 7-punctures region to be cleaned, and 8-breakdown point repairs rear region, and 9-punctures reparation enhancement region, 10-repair liquid infiltration area.
Detailed description of the invention
The present invention will be further described below, and protection scope of the present invention is not limited to the following stated:
As shown in Fig. 1 ~ 4, a kind of crosslinked polyethylene midium voltage cable insulation breakdown strengthens the method repaired, and it comprises the following steps:
It comprises the following steps:
S1, scratching annular incision of 10 ~ 15cm at the ring disc of cable, the degree of depth is close to conductor 1；
S2, section being whittled into cutter dumbbell shape, 10 ~ 15cm is exposed at middle conductor 1 position, is repairing the special steel of slope 6
Cutter, after slowly cut smooth with the sheet glass of 2mm, it is desirable to without wedge angle burr, and expose internal shield 2；
S3, with interior screen material pressing ring conductor 1, merge seam with blowing hot wind, and equating be whole；
S4, with insulating tape be wound around repair insulating barrier the most overlapping wrapped, electricity consumption should be made time wrapped to blow
Wind distance mend 1m mono-blow-through；
S5, insulating barrier are wound around with plastic double-layer band wide for 40 ~ 50cm after winding again；
S6, by the overlapping wrapped repairing section of low-smoke non-halogen flame-retardant band；
S7, at copper strips thick for the wrapped one layer of 0.1mm of outermost layer half lap；
S8, baking copper strips, main concentration toasts edge repair part；
S9, toast 1min every time, dry in the air 10 minutes；Baking 4-5 time repeatedly；
S10, adapter is installed at cable two ends, under the influence of air pressure, repair liquid gap around cable core is entered cable,
Repair liquid also penetrates into insulating barrier, to improve the insulating properties of whole cable, finally achieves in breakdown crosslinked polyethylene and presses
The reparation of cable.
Described repair liquid is nano-macromolecule material, has high osmosis.Therefore can be effectively sharp by this restorative procedure
With scrap cable, can improve residue insulating performance of cable, reduce cable body probability of malfunction, to be greatly promoted cable system stable
Run.In addition the insulating barrier of new extrusion, screen layer to smooth with the insulating barrier of former cable and the contact surface of screen layer, do not have bubble
And impurity.
Claims (2)
1. a crosslinked polyethylene midium voltage cable insulation breakdown strengthens the method repaired, it is characterised in that: it comprises the following steps:
S1, scratching annular incision of 10 ~ 15cm at the ring disc of cable, the degree of depth is close to conductor (1)；
S2, section being whittled into cutter dumbbell shape, 10 ~ 15cm is exposed at middle conductor (1) position, is repairing slope (6) with spy
Steel knife processed, after slowly cut smooth with the sheet glass of 2mm, it is desirable to without wedge angle burr, and expose internal shield (2)；
S3, with interior screen material pressing ring conductor (1), merge seam with blowing hot wind, and equating be whole；
S4, with insulating tape be wound around repair insulating barrier the most overlapping wrapped, electricity consumption should be made time wrapped to blow
Wind distance mend 1m mono-blow-through；
S5, insulating barrier are wound around with plastic double-layer band wide for 40 ~ 50cm after winding again；
S6, by the overlapping wrapped repairing section of low-smoke non-halogen flame-retardant band；
S7, at copper strips thick for the wrapped one layer of 0.1mm of outermost layer half lap；
S8, baking copper strips, main concentration toasts edge repair part；
S9, toast 1min every time, dry in the air 10 minutes；Baking 4-5 time repeatedly；
S10, adapter is installed at cable two ends, under the influence of air pressure, repair liquid gap around cable core is entered cable,
Repair liquid also penetrates into insulating barrier, to improve the insulating properties of whole cable, finally achieves in breakdown crosslinked polyethylene and presses
The reparation of cable.
A kind of crosslinked polyethylene midium voltage cable insulation breakdown the most according to claim 1 strengthens the method repaired, its feature
It is: described repair liquid is nano-macromolecule material, has high osmosis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610778706.XA CN106207889A (en) | 2016-08-31 | 2016-08-31 | A kind of crosslinked polyethylene midium voltage cable insulation breakdown strengthens the method repaired |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610778706.XA CN106207889A (en) | 2016-08-31 | 2016-08-31 | A kind of crosslinked polyethylene midium voltage cable insulation breakdown strengthens the method repaired |
Publications (1)
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| CN106207889A true CN106207889A (en) | 2016-12-07 |
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| CN201610778706.XA Pending CN106207889A (en) | 2016-08-31 | 2016-08-31 | A kind of crosslinked polyethylene midium voltage cable insulation breakdown strengthens the method repaired |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109318450A (en) * | 2018-11-27 | 2019-02-12 | 江苏亨通海洋光网系统有限公司 | There are relaying submarine optical fiber cable insulating layer reparation injection mold, adapted to injection system and renovation technique |
| CN110601097A (en) * | 2018-09-30 | 2019-12-20 | 西南交通大学 | Universal repair method for cable damage |
| CN110601098A (en) * | 2018-09-28 | 2019-12-20 | 西南交通大学 | Standardized repair method for cable damage |
| CN112467637A (en) * | 2020-10-10 | 2021-03-09 | 西北水利水电工程有限责任公司 | Operation method for rapidly recovering main insulation breakdown of tubular bus |
| CN115065009A (en) * | 2022-06-13 | 2022-09-16 | 广东坚宝电缆有限公司 | Medium-high voltage crosslinked polyethylene insulation fault repair power cable and repair method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601098A (en) * | 2018-09-28 | 2019-12-20 | 西南交通大学 | Standardized repair method for cable damage |
| CN110601097A (en) * | 2018-09-30 | 2019-12-20 | 西南交通大学 | Universal repair method for cable damage |
| CN109318450A (en) * | 2018-11-27 | 2019-02-12 | 江苏亨通海洋光网系统有限公司 | There are relaying submarine optical fiber cable insulating layer reparation injection mold, adapted to injection system and renovation technique |
| CN112467637A (en) * | 2020-10-10 | 2021-03-09 | 西北水利水电工程有限责任公司 | Operation method for rapidly recovering main insulation breakdown of tubular bus |
| CN112467637B (en) * | 2020-10-10 | 2022-06-24 | 西北水利水电工程有限责任公司 | Operation method for rapidly recovering main insulation breakdown of tubular bus |
| CN115065009A (en) * | 2022-06-13 | 2022-09-16 | 广东坚宝电缆有限公司 | Medium-high voltage crosslinked polyethylene insulation fault repair power cable and repair method |
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Application publication date: 20161207 |
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| RJ01 | Rejection of invention patent application after publication |