CN108683118A - The cold sulphur restorative procedure of high-voltage flexible cable - Google Patents
The cold sulphur restorative procedure of high-voltage flexible cable Download PDFInfo
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- CN108683118A CN108683118A CN201810348437.2A CN201810348437A CN108683118A CN 108683118 A CN108683118 A CN 108683118A CN 201810348437 A CN201810348437 A CN 201810348437A CN 108683118 A CN108683118 A CN 108683118A
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- Prior art keywords
- phase core
- oversheath
- cable
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- core
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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
-
- 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
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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Abstract
A kind of cold sulphur restorative procedure of high-voltage flexible cable, is related to high-tension cable recovery technique field, especially belongs to a kind of cold sulphur restorative procedure of high-voltage flexible cable.It is characterized in that, specifically comprising the following steps：1）Cable core pre-processing：Damaged part is cut off, oversheath is cleaned, cuts open oversheath, determines that three-phase core junction, removal three-phase core gauze screen, semi-conductive layer, both ends major insulation cover copper shield net in three-phase wicking surface, crimp copper connecting tube at three-phase core respectively；2）Restore cable major insulation：File removes three-phase core copper connecting tube surface spikes, polishing main insulating layer surface, restore three-phase core master absolutely, semi-conductive layer, copper shield, cut three-phase core oversheath；3）Cable cold cure：Cutting, polishing, cleaning oversheath, carry out repair process, pour into cold-patching tube gum, complete vulcanization, carry out insulation against ground experiment and DC break down voltage leakage experiment.This method has saved maintenance cost, and reduces maintenance time, highly practical.
Description
Technical field
The present invention relates to high-tension cable recovery technique fields, especially belong to a kind of cold sulphur restorative procedure of high-voltage flexible cable.
Background technology
Harbour large size handling facilities etc. are powered using 6-10KV high-voltage flexible cables, when high-voltage flexible cable breaks down,
The normal production operation at harbour will be directly affected, how quickly and effectively to repair failure cable, restores the normal of harbour and is produced into
Our urgent problems to be solved.In the prior art, treating method is to replace whole damage high-voltage flexible cable, or will damage
Part amputates, and one section of intermediate cable of supplement is docked with former cable ends.Existing restorative procedure maintenance efficiency is low, and repair time is long,
And a large amount of manpower and materials of waste.
Invention content
Present invention aim to provide a kind of cold sulphur restorative procedure of high-voltage flexible cable, to reach shortening high-voltage flexible cable
Repair time reduces the purpose of rehabilitation cost.
The cold sulphur restorative procedure of high-voltage flexible cable provided by the present invention, which is characterized in that include the following steps：
1）Cable core pre-processing：
Step 1-1, flexible cable damaged part is cut off；
Step 1-2, the oversheath of cleaning cutout unit both sides；
Step 1-3, oversheath is cut open；
Step 1-4, it determines three-phase core junction, centered on damaged part, phase core is symmetrically cut off with manual wire clipper both ends；
Step 1-5, removal three-phase core both ends gauze screen；
Step 1-6, removal three-phase core both ends semi-conductive layer；
Step 1-7, removal three-phase core both ends major insulation, cuts 45 ° of stress cones；
Step 1-8, copper shield net is covered in three-phase wicking surface；
Step 1-9, copper connecting tube at three-phase core is crimped respectively；
2）Restore cable major insulation：
Step 2-1, file removes three-phase core copper connecting tube surface spikes；
Step 2-2, respectively with thick, fine sandpaper polishing three-phase core main insulating layer surface；
Step 2-3, each shielded layer incision position in three-phase core copper connecting tube both sides winds half conduction band and stress zone；
Step 2-4, restore three-phase core major insulation, copper connecting tube surface and copper connecting tube and major insulation seam crossing wind half conduction band and
Water-proof self-adhesion band；
Step 2-5, restore three-phase core semi-conductive layer, wrapped half conduction band below copper shield on the net twined stress zone；
Step 2-6, restore three-phase core copper shield, fix and stretch copper shield net being fitted in phase core outer surface completely；
Step 2-7, the extra oversheath of three-phase core is cut respectively；
3）Cable cold cure：
Step 3-1, oversheath is cut, is completely removed the rubber layer of protrusion between oversheath inner surface phase core with knife, it will be outer
The sheath place of scratching both sides are whittled into taper surface, and the oversheath of endosexine aging is pruned completely；
Step 3-2, polishing oversheath, and do wharf's pavement quality；
Step 3-3, oversheath inner and outer surfaces, the seam crossing between opening both sides and each phase wicking surface and phase core are cleaned；
Step 3-4, repair process is carried out to cable using Mine India-rubber Cable cold-patching tube gum；
Step 3-5, the cold-patching tube gum stirred evenly is poured into high-voltage flexible cable oversheath；
Step 3-6, restored with the method that enhanced mining industry adhesive tape wraps, vulcanization is completed；
Step 3-7, cable carries out insulation against ground experiment and DC break down voltage leakage experiment after reparation.
The cold sulphur restorative procedure of high-voltage flexible cable of the present invention, when high-voltage flexible cable breaks down, nothing needs to change whole electricity
Cable restores major insulation after handling three-phase core premenstruum (premenstrua), finally to the cold sulphuring treatment of oversheath, reaches requirement after testing i.e.
It can.This method has saved maintenance cost, and reduces maintenance time, highly practical.
Description of the drawings
Fig. 1 is the operating diagram of high-voltage flexible cable three-phase copper connecting tube crimping of the present invention.
Specific implementation mode
As shown in Figure 1, cable pre-processing, is as follows：
1, failure flexible cable damaged part is cut off；
2, cleaning failure flexible cable oversheath 1 cleans each 1 meter of flexible cable oversheath 1 in removal of place both sides with the rag of dipped alcohol；
3, oversheath 1 is cut open, flexible cable is placed on fixed position, 90cm is measured from flexible cable end with ruler, is marked with PVC
Note, is scratched along flexible cable upper surface and side intersection with knife, oversheath 1 is detached with phase core, is fixed on PVC after reflexed
On flexible cable；
4, determine phase core junction, flexible cable be placed on fixed position, scratched from 1 root of side oversheath to end measure
Outermost phase core 37cm, is used in combination PVC to make marks；Cut off a phase core along marking with manual wire clipper, with cut phase core phase
8cm is measured from cutting place to end on adjacent another phase core and is made marks with PVC, and marking same phase phase core with T-square symmetrically locates to need
It cuts position and is made marks with PVC, cut off both sides phase core, third root phase core measures 8cm outward again from second phase core gap
It makes marks and cuts off both sides phase core；
5, removal three-phase core gauze screen 4 measures 17cm to the root place of scratching from the both sides ends Xiang Xin with ruler, is made marks with PVC,
Remove gauze screen 4；
6, removal three-phase core semi-conductive layer 5 measures 16cm to the root place of scratching from the both sides ends Xiang Xin with ruler, is marked with PVC
Note removes semi-conductive layer 5 with small scissors；
7, removal three-phase core major insulation 6 measures 2cm to the root place of scratching from the both sides ends Xiang Xin with ruler, is made marks with PVC,
Removal major insulation 6 is removed with knife, is used in combination PVC firmly to encase end metal core, prevents metal core loose, from both sides major insulation
6 ends measure 3,5 cm with ruler to the root place of scratching, and are made marks with PVC, 45 ° of stress cones i.e. " lead is cut from mark to end
Nib "；
8, copper shield net 4 is covered on three-phase core；
9, copper connecting tube 7 is crimped, copper connecting tube 7 is thin-wall copper pipe, and the internal diameter of copper pipe is consistent with the metal core outer diameter stripped out, copper
The length of connecting tube 7 is consistent with the length of metal core, removes the PVC outside metal core, and both sides metal core is put into copper completely to be connected
In take over 7, forbid copper wire exposed, copper connecting tube 7 is crimped with Crimping Pliers；
Restore major insulation after the completion of cable cleaning, is as follows：
1,7 surface spikes of three-phase core copper connecting tube are removed with file file, do not pricked the hand until smooth；
2,6 surface particles of major insulation are removed, first with coarse sandpaper polishing major insulation 6 surface, then are polished until surface with fine sandpaper
Grain completely removes；
3, dispersed masks layer incision position electric field stress, each shielded layer incision position in 7 both sides of copper connecting tube, from 10mm on gauze screen 4
Start partly be overlapped half conduction bands of wrapped one layer of Scotch13, around to major insulation 6 on 10mm place, from copper shield net 4 around half conduction band
Start firmly partly to be overlapped wrapped ply stress band at following 20mm, around to major insulation 6 on from shielded layer incision position 50mm,
In, half conduction band and stress zone must be a standard round at ending in major insulation 6；
4, restore three-phase core main insulating layer 6, it is partly be overlapped wrapped on 7 surface of copper connecting tube and copper connecting tube 7 and 6 seam crossing of major insulation
One layer of half conduction band of Scotch13 is partly overlapped wrapped Scotch23 water-proof self-adhesions band on half conduction band surface, just starts only in two stress
It is wound between cone, to master when twined Scotch23 water-proof self-adhesions tape thickness is slightly less than 6 thickness of major insulation between two stress cones
6 both sides extension of insulating is wound, until major insulation 6 is restored to identical as former main insulating layer thickness；
5, restore three-phase core semi-conductive layer 5, since on copper shield net 4 below twined stress zone from 10mm be partly overlapped wrapped one layer
Half conduction bands of Scotch13, until on symmetrical side copper shield net 4 below twined stress zone at 10mm；
6, restore three-phase core copper shield 4, the copper shield net 4 of side is unfolded and is fixed on native copper shielded layer, in symmetrical side
Copper shield net 4 is firmly stretched, until copper shield net 4 is fitted in phase core outer surface completely；
7, cut the extra oversheath 1 of three-phase core respectively, with ruler in right upper portion exceptionally sheath 1 from the root place of scratching to the left
It measures redundance and is made marks with PVC, redundance is measured to the 1 root place of scratching of oversheath from left end and made of PVC
Label, cuts extra oversheath 1 from the place of being marked, similarly, in turn by flexible cable, with ruler in left upper portion with knife
Exceptionally redundance is measured from the root place of scratching to the right on sheath 1 and made marks with PVC, from right-hand end to oversheath 1
The place of scratching of portion measures redundance and is made marks with PVC, and extra oversheath 1 is cut from the place of being marked with knife；
Cable after recovery carries out 1 cold cure of oversheath, is as follows：
1, oversheath 1 is cut, is completely removed the rubber layer of protrusion between 1 inner surface phase core of oversheath with knife, by oversheath 1
The place of scratching both sides are whittled into taper surface, and the oversheath 1 of 1m ranges endosexine aging is pruned completely；
2, polishing oversheath 1 is all beaten 1 outer surface of oversheath within the scope of 1m, inner surface, opening both sides with sand paper and wood file
Wharf's pavement quality is ground and done, makes the fresh surface of exposing to increase adhesive surface, keeps bonding secured；
3, oversheath 1 is cleaned, 1 outer surface of oversheath, inner surface, opening both sides within the scope of 1m are cleaned with the rag for being soaked with gasoline
And the seam crossing between each phase wicking surface and phase core；
4, repair process is carried out to cable using Mine India-rubber Cable cold-patching tube gum；
5, according to 1 situation of flexible cable oversheath, estimate glue consumption, select the cold-patching tube gum with packing specification；
6, first that first component cover is fully open, component B cover is then opened again, component B is all poured into first component, is used
The tools such as dry screwdriver quickly stir 2-3 minutes or so, and two components is made to be sufficiently mixed uniformly；
7, the cold-patching tube gum stirred evenly is poured into high-voltage flexible cable oversheath 1；
8, restored with the method that enhanced mining industry adhesive tape wraps, vulcanization is completed.
The flexible cable that cold cure is completed carries out electrical test, examines the repairing effect of flexible cable, steps are as follows：
1, insulation against ground is tested, 5000V megameters, criterion of acceptability:400-1000 megaohms；
2, DC break down voltage leakage experiment, DC break down voltage machine, criterion of acceptability：For 6KV flexible cables pressurize 15KV, leakage current with
The alive raising of institute and increases, after pressurization 15KV stabilizations, leakage current extension at any time and reduce, 5MIN is leakage current
Less than 8uA.
Claims (2)
1. a kind of cold sulphur restorative procedure of high-voltage flexible cable, which is characterized in that specifically comprise the following steps：
1）Cable core pre-processing：
Step 1-1, flexible cable damaged part is cut off；
Step 1-2, the oversheath of cleaning cutout unit both sides（1）；
Step 1-3, oversheath is cut open（1）；
Step 1-4, three-phase core junction is determined, centered on damaged part, both ends symmetrically subtract phase core；
Step 1-5, removal three-phase core both ends gauze screen（4）；
Step 1-6, removal three-phase core both ends semi-conductive layer（5）；
Step 1-7, removal three-phase core both ends major insulation（6）, cut 45 ° of stress cones；
Step 1-8, copper shield net is covered in three-phase wicking surface（4）；
Step 1-9, copper connecting tube at three-phase core is crimped respectively（7）；
2）Restore cable major insulation：
Step 2-1, file removes three-phase core copper connecting tube（7）Surface spikes；
Step 2-2, respectively with thick, fine sandpaper polishing three-phase core main insulating layer（6）Surface；
Step 2-3, three-phase core copper connecting tube（7）Each shielded layer incision position in both sides winds half conduction band and stress zone；
Step 2-4, restore three-phase core major insulation（6）, copper connecting tube（7）Surface and copper connecting tube（7）With major insulation（6）Seam crossing
Wind half conduction band and water-proof self-adhesion band；
Step 2-5, restore three-phase core semi-conductive layer（5）, from copper shield net（4）Wrapped half conduction band below upper twined stress zone；
Step 2-6, restore three-phase core copper shield（4）, fix and stretch copper shield net（4）It is fitted in phase core outer surface completely；
Step 2-7, the extra oversheath of three-phase core is cut respectively（1）；
3）Cable cold cure：
Step 3-1, oversheath is cut（1）, with knife by oversheath（1）The rubber layer of protrusion is gone completely between inner surface phase core
It removes, by oversheath（1）The place of scratching both sides are whittled into taper surface, by the oversheath of endosexine aging（1）It prunes completely；
Step 3-2, polishing oversheath（1）, and do wharf's pavement quality；
Step 3-3, oversheath is cleaned（1）Inner and outer surfaces, the seam crossing between opening both sides and each phase wicking surface and phase core；
Step 3-4, repair process is carried out to cable using Mine India-rubber Cable cold-patching tube gum；
Step 3-5, the cold-patching tube gum stirred evenly is poured into high-voltage flexible cable oversheath（1）It is interior；
Step 3-6, restored with the method that enhanced mining industry adhesive tape wraps, complete vulcanization；
Step 3-7, cable carries out insulation against ground experiment and DC break down voltage leakage experiment after reparation.
2. the cold sulphur restorative procedure of high-voltage flexible cable according to claim 1, it is characterized in that, the copper connecting tube（7）For
Thin-wall copper pipe, the internal diameter of copper pipe is consistent with the metal core outer diameter stripped out, copper connecting tube（7）Length and metal core length
Unanimously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810348437.2A CN108683118A (en) | 2018-04-18 | 2018-04-18 | The cold sulphur restorative procedure of high-voltage flexible cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810348437.2A CN108683118A (en) | 2018-04-18 | 2018-04-18 | The cold sulphur restorative procedure of high-voltage flexible cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108683118A true CN108683118A (en) | 2018-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810348437.2A Withdrawn CN108683118A (en) | 2018-04-18 | 2018-04-18 | The cold sulphur restorative procedure of high-voltage flexible cable |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361271A (en) * | 2011-08-04 | 2012-02-22 | 江苏圣安电缆有限公司 | Method for repairing damage of external shield of medium and high voltage cable |
| CN203418684U (en) * | 2013-07-24 | 2014-02-05 | 河北钢铁集团矿业有限公司 | Mould for rubber cold patching and vulcanization for mine high-voltage rubber sleeve cable joint |
| CN104466816A (en) * | 2014-12-18 | 2015-03-25 | 国网四川省电力公司成都供电公司 | Technology for improving electric power cable maintenance efficiency |
| CN104617525A (en) * | 2014-12-30 | 2015-05-13 | 内蒙古仁达特种电缆有限公司 | Repair method of insulation defect of power cable thermoplastic materials |
| CN105262013A (en) * | 2015-09-25 | 2016-01-20 | 酒泉钢铁(集团)有限责任公司 | Insulation repair method for 10 kV high-voltage cable |
-
2018
- 2018-04-18 CN CN201810348437.2A patent/CN108683118A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361271A (en) * | 2011-08-04 | 2012-02-22 | 江苏圣安电缆有限公司 | Method for repairing damage of external shield of medium and high voltage cable |
| CN203418684U (en) * | 2013-07-24 | 2014-02-05 | 河北钢铁集团矿业有限公司 | Mould for rubber cold patching and vulcanization for mine high-voltage rubber sleeve cable joint |
| CN104466816A (en) * | 2014-12-18 | 2015-03-25 | 国网四川省电力公司成都供电公司 | Technology for improving electric power cable maintenance efficiency |
| CN104617525A (en) * | 2014-12-30 | 2015-05-13 | 内蒙古仁达特种电缆有限公司 | Repair method of insulation defect of power cable thermoplastic materials |
| CN105262013A (en) * | 2015-09-25 | 2016-01-20 | 酒泉钢铁(集团)有限责任公司 | Insulation repair method for 10 kV high-voltage cable |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181019 |
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