CN105845261B - Twisted polyethylene cable and its restorative procedure are pressed in one kind - Google Patents
Twisted polyethylene cable and its restorative procedure are pressed in one kind Download PDFInfo
- Publication number
- CN105845261B CN105845261B CN201610412232.7A CN201610412232A CN105845261B CN 105845261 B CN105845261 B CN 105845261B CN 201610412232 A CN201610412232 A CN 201610412232A CN 105845261 B CN105845261 B CN 105845261B
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- layer
- wrapped
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- tape
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/021—Features relating to screening tape per se
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention discloses twisted polyethylene cable and its restorative procedure are pressed in one kind, in the case of not sawed-off cable conductor, wrapped conductor shielding band, 10kV insulation films, teflin tape, copper strips successively, simulate the cross linking conditions of crosslinked polyethylene, using electricity or coal gas stove heat, after 10kV insulation films are full cross-linked form unified entirety with former insulation after, remove copper strips, polytetrafluoroethylene (PTFE), spray insulation shields in insulation, wrapped semi-conductive tape, copper strips, liner, armor, outer jacket are then repaired successively.The device have the advantages that：Production process in simulation factory is repaired in insulation, and the insulation after reparation forms unified entirety with cable body, eliminates shelf depreciation, security, reliability increase.
Description
Technical field
The invention belongs to cable recovery technique field, and in particular to twisted polyethylene cable and its insulation are pressed in a kind of 10kV
Restorative procedure.
Background technology
The crosslinked polyetylene insulated medium-pressure power cables of 10kV barbarous construction, overload operation, cable in unwrapping wire are deposited in itself
In defect etc., operationally as electric branch and water tree constantly grow, insulating, most weak point can first puncture.Tradition
Renovation technique：The cable core of three-phase is sawed-off, docked with connecting tube, make transition joint；Or in not sawed-off core
In the case of according to the wrapped corresponding band of the principle successively repaired.Manufacture craft has following deficiency：1. connecting tube docking destroys
Cable body, mechanical strength and electric property are affected, and easily overheat, potential safety hazard be present；It is 2. successively wrapped corresponding
Band, air gap is inevitably left between band, Electric Field Distribution can be caused uneven, shelf depreciation occurs, potential safety hazard be present；3.
Lapped insulation layer material and the crosslinked polyetylene insulated difference of cable body, interface easily occurs shelf depreciation, potential safety hazard be present.
The content of the invention
The purpose of patent of the present invention is to make up the deficiencies in the prior art, there is provided pressed in a kind of twisted polyethylene cable and its
Restorative procedure, realize and repair in the case of may be implemented in not sawed-off cable conductor.
In order to reach the purpose of the present invention, technical scheme is as follows：
Twisted polyethylene cable is pressed in one kind, it is characterised in that from the inside to the outside successively include separation sleeve, steel-tape armouring layer and
Oversheath, is provided with more cores inside separation sleeve, the core from the inside to the outside successively including conductor, conductor shield, insulating barrier,
Insulation screen, filler is equipped between core and core and between core and separation sleeve.
Crosslinking polyethylene-insulated cable insulation restorative procedure is pressed in one kind, it is characterised in that including step：
The first step:Axially open oversheath, steel-tape armouring layer, the separation sleeve of cable successively along cable, wherein oversheath is beaten
Opening length standard is：As conductor nominal section≤120mm2When for 1.2m, as conductor nominal section >=150mm2When be that 1.5m is
Preferably；Two layers of steel band of steel-tape armouring layer, both ends respectively cut one layer；
Second step：Centered on trouble point, insulation is cut out into taper into 30 ° of angular both ends with conductor, ensures conical surface
Rounding is bright and clean, ensures that conductor shield is complete；
3rd step：Conductor carbon distribution is cleaned with steel brush and alcohol, electricity consumption blowing drying, treats its nature during no power supply
Volatile dry；
4th step：Semiconductor adhesive is smeared at the defect of conductor shield, shape is coincide, the conductor that profile is bigger
Screen layer is adhered on conductor；
5th step：Crosslinked polyethylene lapping layer is made, crosslinked polyethylene film is close wrapped since one end, and Duplication is
50%, it is wrapped to height same with insulation screen；
6th step：Overlapping wrapped one layer of teflin tape, Duplication at away from crosslinked polyethylene lapping layer edge 10cm
For 50%, the wrapped 2 layers of heat-insulated aluminium foil of polytetrafluoroethylene (PTFE) belt edge, wrapped 1 layer of copper strips between heat-insulated aluminium foil,
In the case that scene does not have power supply, with gas burner, Heated Copper band 1 is small in a manner of 3 minutes heating, 1 minute interval
When, Heated Copper band 0.5 hour in a manner of 1 minute heating, 1 minute interval, treats its natural cooling afterwards；
In the case that there is power supply at scene, thermocouple, the wrapped heating tape in copper strips top, heat are placed in polytetrafluoroethylene (PTFE) middle
The temperature of galvanic couple is set by temperature controller, the setting of temperature controller temperature：As conductor nominal section≤120mm2When for 200 DEG C, when leading
Body nominal section >=150mm2When be 220 DEG C, the time relay is arranged to 1h, treat its self-heating cool down；
7th step：After removing each layer on crosslinked polyethylene lapping layer successively, partly led in the spraying of crosslinked polyethylene lapping layer
Electricity paint, overlapping wrapped semi-conductive tape Duplication are 50%；
8th step：Recover copper strip shielding layer, with the copper strips of same specification 3-5cm overlapping with native copper band, consolidated with PVC tape
It is fixed, overlapping wrapped, Duplication 20%；
9th step：Recover separation sleeve, select same material sheet material, it is wide to be cut into 2cm, is blowed and fused with hair dryer, by cutter
Mouthful place's material formed it is unified integrally, with ensure copper strip shielding layer and steel-tape armouring layer do not have it is any contact, filler can be without
Processing；
Tenth step：Recover steel-tape armouring layer, take same width steel band to cut the mounting mouth at oblique angle at 45 °, mount the width of mouth
The half of width of steel band is should be, is mounted with raw steel band, is fixed with PVC bands；
11st step：Recover oversheath, former surface of outer sheath is drawn respectively with repairing with the surface of outer sheath of same material
Go out the substantially identical vestige of convex-concave, with the wrapped fixation of teflin tape, heat gun blows and fuses, and is pressed with cardboard,
After combining together, remove band, then waterproof effect strengthened with water-proof seal adhesive tape, with it is overlapping around packet mode carry out around
Bag, Duplication 50% is wrapped outside oversheath, and 5-10cm is overlapped with oversheath.
Further, when repairing, there is interruption on insulation screen, crosslinked polyethylene lapping layer is provided with discontinuities, insulate
Screen layer lateral wall is provided with heat-insulated aluminium foil and copper strip shielding layer, and crosslinked polyethylene lapping layer is provided with thermocouple.
The device have the advantages that：
Production process in simulation factory is repaired in insulation, and the insulation after reparation forms unified entirety with cable body, eliminates
Shelf depreciation, security, reliability increase.
Brief description of the drawings
Fig. 1 is the structural representation that twisted polyethylene cable is pressed in the present invention；
Fig. 2 is structural representation when cable is repaired.
Embodiment
With reference to embodiment, the invention will be further described, but protection scope of the present invention is not limited solely to implement
Example.
With reference to shown in Fig. 1, Fig. 2, twisted polyethylene cable is pressed in a kind of, includes separation sleeve 7, steel band armour successively from the inside to the outside
Layer 8 and oversheath 9 are filled, the inside of separation sleeve 7 is provided with more cores, and the core includes conductor 1, conductor shielding successively from the inside to the outside
Layer 2, insulating barrier 3, insulation screen 4, are equipped with filler 6 between core and core and between core and separation sleeve.
Crosslinking polyethylene-insulated cable insulation restorative procedure is pressed in one kind, it is characterised in that including step：
The first step:Axially open oversheath 9, steel-tape armouring layer 8, the wherein separation sleeve 7, oversheath of cable successively along cable
Opening length standard is：As 1 nominal section of conductor≤120mm2When for 1.2m, as 1 nominal section of conductor >=150mm2When be 1.5m
It is advisable；Two layers of steel band of steel-tape armouring layer 8, both ends respectively cut one layer；
Second step：Centered on trouble point, insulation is cut out into taper into 30 ° of angular both ends with conductor 1, ensures conical surface
Rounding is bright and clean, ensures that conductor shield 2 is complete；
3rd step：Conductor carbon distribution is cleaned with steel brush and alcohol, electricity consumption blowing drying, treats its nature during no power supply
Volatile dry；
4th step：Semiconductor adhesive is smeared at the defect of conductor shield 2, by shape is coincide, profile is bigger leads
Body screen layer is adhered on conductor 1；
5th step：Make crosslinked polyethylene lapping layer 11, crosslinked polyethylene film close wrapped, Duplication since one end
For 50%, it is wrapped to the same height of insulation screen 4；
6th step：Overlapping wrapped one layer of teflin tape, overlapping at away from the edge 10cm of crosslinked polyethylene lapping layer 11
Rate is 50%, wrapped 2 layers heat-insulated aluminium foil 12 of polytetrafluoroethylene (PTFE) belt edge, wrapped 1 layer of copper strips between heat-insulated aluminium foil 12,
In the case that scene does not have power supply, with gas burner, Heated Copper band 1 is small in a manner of 3 minutes heating, 1 minute interval
When, Heated Copper band 0.5 hour in a manner of 1 minute heating, 1 minute interval, treats its natural cooling afterwards；
In the case that there is power supply at scene, the wrapped heating tape above polytetrafluoroethylene (PTFE) middle placement thermocouple 10, copper strips,
The temperature of thermocouple is set by temperature controller, the setting of temperature controller temperature：As 1 nominal section of conductor≤120mm2When for 200 DEG C, when
1 nominal section of conductor >=150mm2When be 220 DEG C, the time relay is arranged to 1h, treat its self-heating cool down；
7th step：After removing each layer on crosslinked polyethylene lapping layer 11 successively, sprayed in crosslinked polyethylene lapping layer 11
Semiconductive varnish, overlapping wrapped semi-conductive tape Duplication are 50%；
8th step：Recover copper strip shielding layer 5, with the copper strips of same specification 3-5cm overlapping with native copper band, consolidated with PVC tape
It is fixed, overlapping wrapped, Duplication 20%；
9th step：Recover separation sleeve 7, select same material sheet material, it is wide to be cut into 2cm, is blowed and fused with hair dryer, by cutter
Material is formed unified overall at mouthful, and to ensure that copper strip shielding layer 5 contacts with steel-tape armouring layer 8 without any, filler can not enter
Row processing；
Tenth step：Recover steel-tape armouring layer 8, take same width steel band to cut the mounting mouth at oblique angle at 45 °, mount the width of mouth
The half of width of steel band is should be, is mounted with raw steel band, is fixed with PVC bands；
11st step：Recover oversheath 9, the former surface of oversheath 9 is distinguished with the surface of outer sheath repaired with same material
Mark the substantially identical vestige of convex-concave, with the wrapped fixation of teflin tape, heat gun blows and fuses, and with cardboard carry out by
Pressure, after combining together, band is removed, then waterproof effect is strengthened with water-proof seal adhesive tape, carried out with overlapping around packet mode
Wrapped, Duplication 50% is wrapped outside oversheath, with overlapping 5-10cm with oversheath.
Shown in reference picture 2, when repairing, there is interruption on insulation screen 4, crosslinked polyethylene lapping layer is provided with discontinuities
11, the lateral wall of insulation screen 4 is provided with heat-insulated aluminium foil 12 and copper strip shielding layer 5, and crosslinked polyethylene lapping layer 11 is provided with heat
Galvanic couple 10.
Finally it should be noted that：Above example only not limits technology described in the invention to illustrate the present invention
Scheme, therefore, although this specification with reference to above-mentioned each embodiment to present invention has been detailed description, this
Field it is to be appreciated by one skilled in the art that still can be modified to the present invention or equivalent substitution, and all do not depart from this
The technical scheme of the spirit and scope of invention and its improvement, it all should cover in scope of the presently claimed invention.
Claims (2)
1. crosslinking polyethylene-insulated cable insulation restorative procedure is pressed in one kind, it is characterised in that including step：
The first step:Axially open oversheath (9), steel-tape armouring layer (8), the separation sleeve (7) of cable, its China and foreign countries shield successively along cable
Set (9) opens length standard：As conductor (1) nominal section≤120mm2When for 1.2m, when conductor (1) nominal section >=
150mm2When be 1.5m；Two layers of steel band of steel-tape armouring layer (8), both ends respectively cut one layer；
Second step：Centered on trouble point, insulation is cut out into taper into 30 ° of angular both ends with conductor, ensures conical surface rounding
It is bright and clean, ensure that conductor shield (2) is complete；
3rd step：Conductor carbon distribution is cleaned with steel brush and alcohol, electricity consumption blowing drying, treats that it volatilizees naturally during no power supply
Dry；
4th step：Semiconductor adhesive is smeared at the defect of conductor shield (2), shape is coincide, the conductor that profile is bigger
Screen layer (2) is adhered on conductor；
5th step：Crosslinked polyethylene lapping layer (11) is made, crosslinked polyethylene film is close wrapped since one end, and Duplication is
50%, it is wrapped to same highly with insulation screen (4)；
6th step：Overlapping wrapped one layer of teflin tape, Duplication at away from crosslinked polyethylene lapping layer (11) edge 10cm
For 50%, the heat-insulated aluminium foil (12) of wrapped 2 layers of polytetrafluoroethylene (PTFE) belt edge, wrapped 1 layer of copper strips between heat-insulated aluminium foil (12),
In the case that scene does not have power supply, heated with gas burner by 3 minutes, Heated Copper band 1 hour in a manner of 1 minute interval, it
Heated Copper band 0.5 hour in a manner of 1 minute heating, 1 minute interval afterwards, treats its natural cooling；
In the case that there is power supply at scene, the wrapped heating tape above teflin tape middle placement thermocouple (10), copper strips,
The temperature of thermocouple (10) is set by temperature controller, the setting of temperature controller temperature：As conductor (1) nominal section≤120mm2Shi Wei
200 DEG C, as conductor (1) nominal section >=150mm2When be 220 DEG C, the time relay is arranged to 1h, treat its self-heating cool down；
7th step：Heat-insulated aluminium foil (12), copper strips and the teflin tape on crosslinked polyethylene lapping layer (11) are removed successively,
Crosslinked polyethylene lapping layer (11) sprays semiconductive varnish, overlapping wrapped semi-conductive tape, Duplication 50%；
8th step：Recover copper strip shielding layer, around copper sheets, the copper sheets and copper strips specification phase on copper strip shielding layer
Together, copper sheets 3-5cm overlapping with copper strips, is fixed with PVC tape, overlapping wrapped, Duplication 20%；
9th step：Recover separation sleeve (7), select same material sheet material, it is wide to be cut into 2cm, is blowed and fused with hair dryer, by cutting knife
Place's material forms unified entirety, to ensure copper strip shielding layer with steel-tape armouring layer (8) without any contact；
Tenth step：Recover steel-tape armouring layer (8), take same width steel band to cut the mounting mouth at oblique angle at 45 °, the width for mounting mouth should
For the half of width of steel band, mounted with raw steel band, be fixed with PVC bands；
11st step：Recover oversheath (9), by former oversheath (9) surface with repairing oversheath (9) surface point with same material
Do not mark the substantially identical vestige of convex-concave, with the wrapped fixation of teflin tape, heat gun blows and fuses, and with cardboard carry out by
Pressure, after combining together, band is removed, then waterproof effect is strengthened with water-proof seal adhesive tape, carried out with overlapping around packet mode
It is wrapped, Duplication 50%, it is wrapped in oversheath (9) outside, with oversheath (9) overlap 5-10cm.
2. press crosslinking polyethylene-insulated cable insulation restorative procedure in one kind as claimed in claim 1, it is characterised in that repairing
When, insulation screen has interruption on (4), and crosslinked polyethylene lapping layer (11), insulation screen (4) lateral wall are provided with discontinuities
Heat-insulated aluminium foil (12) and copper strip shielding layer (5) are provided with, crosslinked polyethylene lapping layer is provided with thermocouple (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412232.7A CN105845261B (en) | 2016-06-13 | 2016-06-13 | Twisted polyethylene cable and its restorative procedure are pressed in one kind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412232.7A CN105845261B (en) | 2016-06-13 | 2016-06-13 | Twisted polyethylene cable and its restorative procedure are pressed in one kind |
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| Publication Number | Publication Date |
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| CN105845261A CN105845261A (en) | 2016-08-10 |
| CN105845261B true CN105845261B (en) | 2017-11-10 |
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| CN105390999B (en) * | 2015-10-29 | 2017-08-15 | 江苏沃能电气科技有限公司 | A kind of busbar joint insulation recovery processing method |
| CN106057365A (en) * | 2016-08-15 | 2016-10-26 | 河南开启电力实业有限公司 | Repair method for low-voltage organosilane crosslinked polyethylene insulated cable |
| CN107706837A (en) * | 2017-09-19 | 2018-02-16 | 浙江昌泰电力电缆有限公司 | A kind of below 500KV cross-linked polyethylene insulated cables transition joint making and repair novel construction skill |
| CN107994517B (en) * | 2017-11-22 | 2019-08-09 | 广东科启电力技术有限公司 | 10kV to 35kV cable craft fusing type straight coupling production method |
| CN109066499A (en) * | 2018-08-31 | 2018-12-21 | 北部湾港防城港码头有限公司 | A kind of restorative procedure of multicore high-pressure heavy Plastic-sheathed Cable |
| CN112271657B (en) * | 2020-11-04 | 2022-10-28 | 南方电网科学研究院有限责任公司 | Polypropylene 10kV molded cable joint and manufacturing method thereof |
| CN114050518B (en) * | 2021-09-24 | 2024-05-28 | 宁波东方电缆股份有限公司 | Manufacturing process of 66kV-500kV cable middle wrapping welding type soft joint |
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| CN101159182A (en) * | 2007-08-09 | 2008-04-09 | 汤国江 | Electrical cable renovating method |
| 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 |
| CN202694955U (en) * | 2012-06-27 | 2013-01-23 | 杭州电缆股份有限公司 | 6kV to 35kV cross-linked cable for smart grids |
| 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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2016
- 2016-06-13 CN CN201610412232.7A patent/CN105845261B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159182A (en) * | 2007-08-09 | 2008-04-09 | 汤国江 | Electrical cable renovating method |
| 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 |
| CN202694955U (en) * | 2012-06-27 | 2013-01-23 | 杭州电缆股份有限公司 | 6kV to 35kV cross-linked cable for smart grids |
| 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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