CN107123956A - A kind of intermediate joint of electric cable welding and renovation technique - Google Patents
A kind of intermediate joint of electric cable welding and renovation technique Download PDFInfo
- Publication number
- CN107123956A CN107123956A CN201710339962.3A CN201710339962A CN107123956A CN 107123956 A CN107123956 A CN 107123956A CN 201710339962 A CN201710339962 A CN 201710339962A CN 107123956 A CN107123956 A CN 107123956A
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- cable
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- reparation
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Classifications
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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
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Processing Of Terminals (AREA)
- Cable Accessories (AREA)
Abstract
The invention discloses a kind of welding of intermediate joint of electric cable and renovation technique, the technique includes：Two cables are subjected to stripping, and restrictive coating, waterproof layer, copper shield, main insulating layer, interior semi-conductive layer, conductor respectively in processing cable two ends according to drawing size；Then thermal sleeve is inserted in the cable and shrinkage trident gloves are installed in the end on cable both sides；The welding of cable conductor：Slope is made in the cross-sectional area of conductor of two sections of cables, and the conductor slope alignment of two sections of cables is alignd；SAPMAC method equipment is installed, and the cooling device that SAPMAC method equipment will be connected to, on two sections of conductors after, start SAPMAC method equipment；Then carried out using welding rifle and metal electrode, the slope of two sections of conductors is welded.The present invention has the advantages that the investment of reduction grinding tool and loss, technique is simple and safe, efficiency of construction is higher, construction of cable reparation is complete, reliability is high, in the reparation field of high pressure, EHV XLPE power cable with extensive production and application value.
Description
Technical field
The present invention relates to high pressure, the reparation field of EHV XLPE power cable, more particularly in the middle of a kind of power cable
Weld and renovation technique.
Background technology
Power cable is made up of multi-layer compound structure, therefore the transition joint of power cable is intended to recover each function as far as possible
Complete connection between layer, because longtime running is under high pressure high electric field operating mode, be to the quality requirement of material and mounting process
High.The middle interconnection technique of common power cable has：
1. adhesive tape is around packet mode transition joint：Connect using types of functionality electric adhesive tape scene cable wrapped layer by layer
Head；Advantage is that waterproof is reliable, has the disadvantage that the probability that gap is produced between complicated construction technique, adhesive tape and adhesive tape is big；
2. thermal shrinkage type transition joint：The heat-shrinkable tube of different electric properties is inserted in the electricity that the roasting heating of cable fire is completed layer by layer
Cable joint；Advantage be it is with low cost, install do not allow it is error-prone；Have the disadvantage needs get angry, long-term waterproof effect it is undesirable；
3. rubber prefabricated transition joint：Core component (main body) is to be molded into technique by factory to be molded into liquid rubber
The tubular structural member of MULTILAYER COMPOSITE one, precalculated position is inserted in during in-site installation by rubber tube, then with adhesive waterproof tape and armoring tape
Make the cable connector of outer layer protection；Advantage is that integral process reduces site operation link, reduces interfacial gap and go wrong
Probability；Have the disadvantage that rubber tube specification must one by one be matched with cross-section of cable size, universal performance is poor, construction when to be inserted in by manpower
Caused high effort on cable；
4. (rubber is prefabricated) cold shrink type middle joint：Developed on the basis of rubber prefabricated technology, will in factory
, only need to be from during in-site installation on the support stripe shape pipe that prefabricated rubber tube is enclosed on high intensity by mechanical expansion equipment, can extract
Support bar is extracted in one end, and rubber tube is coated on a kind of cable for completing to install on cable by the resilience retraction of material in itself and connect
Head；Advantage is that site operation is convenient and strength-saving, it is wide to be applicable cable range, possess lasting enclasping force without special tool(s), to cable,
Quality of materials is reliable, is a kind of current most common technology；When having the disadvantage, production high to installation dimension required precision or be long
Between preserve that to have elastic properties of materials aging phenomenon, long-term water resistance undesirable etc..
Present invention
The technical problems to be solved by the invention are：Defect for more than, the invention provides a kind of construction of cable
It is more complete in terms of recovery, reliable, especially a kind of intermediate joint of electric cable welding and renovation technique.
Technical scheme is as follows：A kind of welding of intermediate joint of electric cable and renovation technique, the technique include with
Lower step：
S1：Cable is subjected to stripping, and restrictive coating, waterproof layer, copper respectively in processing cable two ends according to drawing size
Shielding, main insulating layer, interior semi-conductive layer, conductor；Then thermal sleeve is inserted in the cable, and is installed in the end on cable both sides
Shrinkage trident gloves；
S2：The welding of cable conductor：The welding of cable conductor：Slope is made in the cross-sectional area of conductor of two sections of cables, and it is right
The slope alignment alignment of two sections of cable conductors；Then SAPMAC method equipment is installed, and the cooling for being connected to SAPMAC method equipment is filled
Put, on two sections of conductors after；Start SAPMAC method equipment；Carried out using welding rifle and metal electrode, to the oblique of two sections of conductors
Domatic welding；
S3：The reparation of interior semi-conductive layer：Band is fluidized from customized semiconductive, is carried out directly in cable inner semiconducting layer
Wrapped fluidisation, isometrical recovery；
S4：The reparation of main insulating layer：It is uniform wrapped in interior semi-conductive layer from customized crosslinked polyetylene insulated fluidisation band
On；Interior semi-conductive layer it is wrapped fluidisation take to it is certain thickness after；Pressure bonding device is inserted in, then above pressure bonding device；
Heater and Temperature-controlled appliance are installed, and Stress control in 1-2MPa, temperature control is between 100 DEG C~200 DEG C；Separately
The joint two ends of external cross-sectional area of conductor install cable internal control warming-up device, and by current control between 200A~800A；Through
Cross after pressurization in 1-2 hours, temperature control；All control devices are taken off, main insulating layer surface sanding and polishing is carried out, spray is then followed by and touches half
Conductive paint, wrapped customized semi-conductive tape；
S5：Copper shield is recovered：The flexible copper guipure worked out by fine copper, half it is overlapping by outer semiconducting layer it is complete around
Bag, and with the copper shield of cable fully overlap and fixed；
S6：By at the cross-sectional area of conductor of cable two ends wind adhesive waterproof tape, and with mounted shrinkage trident gloves, overlap joint
It is connected as a single entity；Reach, the water resistance entered in cable intermediate joint is interposed between outside；
S7：The reparation of restrictive coating：Heat-shrinkable T bush is enclosed on into shrinkage trident hand to put, and by temperature-sensitive fluidisation sheath repair band around
Bag will be fluidized by external heat equipment and formed and the isometrical external sheath layer of cable with thawing in the outside of heat-shrinkable T bush.
Preferentially, the metal electrode is set to silver solder；The welding rifle melts to silver solder, makes conductor slope
Completely coated, and stack out solid contact surface after the cooling period.
Preferentially, the material being set in semiconductive fluidisation band as cable inner semiconducting layer attribute is made.
Preferentially, the crosslinked polyetylene insulated fluidisation band is set to and cable insulation attribute identical insulating materials system
Into.
Preferentially, the shrinkage trident hand set is set to the gum sleeve that silicon rubber is made.
Using such scheme, the beneficial effects of the invention are as follows：
The semiconductive that the present invention is used fluidizes band, crosslinked polyetylene insulated fluidisation band, flexible copper guipure, temperature-sensitive fluidisation band all
Customized for factory, the equipment of carrying is small and lacks, and the workflow of reparation is simple；Therefore beneficial effect of the present invention, which has, is reduced
Grinding tool is invested and is lost, technique is simple and safe, efficiency of construction is higher, the construction of cable repairs the high advantage of complete, reliability.
Brief description of the drawings
Fig. 1 schemes for the cable conductor welding of the present invention；
Fig. 2 is major insulation reparation figure of the invention；
Fig. 3 is waterproof layer reparation figure of the invention；
Fig. 4 is copper shield reparation figure of the invention；
Fig. 5 is restrictive coating reparation figure of the invention；
Design sketch after Fig. 6 repairs for the cable of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail；
As shown in Figures 1 to 6：Present embodiments provide a kind of intermediate joint of electric cable welding and renovation technique, the work
Skill comprises the following steps：
S1：Two cables are subjected to stripping according to drawing size, and handle the restrictive coating 1f in cable two ends, waterproof respectively
Layer 1e, copper shield 1d, main insulating layer 1b, interior semi-conductive layer 1a, conductor 1c；Then thermal sleeve 3 is inserted in cable 1 and in electricity
The end on cable both sides installs shrinkage trident gloves 2；
S2：The welding of cable conductor：Slope is made in the conductor 1c sections of two sections of cables, and to the conductor of two sections of cables
The alignment of 1c slopes is alignd；SAPMAC method equipment 4, and the cooling device 4a that will be connected to SAPMAC method equipment 4 are installed, installed in two sections
After on conductor, start SAPMAC method equipment 4；Then carried out using welding rifle 6 and metal electrode, two sections of conductor 1c slope is welded
Connect；
During welding by cooling-cycle apparatus 4 connect cooling device 4a, with avoid cable body interior semi-conductive layer 1a and
Main insulating layer 1b thermal damage, abundant resistance is small, close structure tensile property is good, will not with contacting by the conductor 1c after welding
Produce contaminative impurity.
S3：The reparation of interior semi-conductive layer：Band is fluidized from customized semiconductive, it is directly enterprising in cable inner semiconducting layer 1a
The wrapped fluidisation of row, isometrical recovery；Well in advance semiconductive material cup is not used, technique is simpler；
S4：The reparation of main insulating layer：It is uniform wrapped in interior semiconductor layer from customized crosslinked polyetylene insulated fluidisation band
On 1a；Interior semi-conductive layer 1a it is wrapped fluidisation take to it is certain thickness after；Pressure bonding device 8 is inserted in Stress control in 1-
2MPa, then above pressure bonding device 8；Heater 7b and Temperature-controlled appliance 7 are installed, and temperature control at 100 DEG C
Between~200 DEG C；Cable internal control warming-up device 7c is installed in addition at the joint two ends in conductor 1c sections, and current control is existed
Between 200A~800A；Pressurize again by 1-2h, after temperature control；All control devices are taken off, and main insulating layer 1b surfaces are carried out
Sanding and polishing, is then followed by spray and touches semiconductive varnish；
S5：Copper shield is repaired：The flexible copper guipure worked out by fine copper, half it is overlapping by outer semiconducting layer it is complete around
Bag, and with the copper shield 1d of cable fully overlap and fixed, wrapped customized semi-conductive tape；
S6：The reparation of waterproof layer：By at the conductor 1c sections of cable two ends wind adhesive waterproof tape 9, and with it is mounted
Shrinkage trident gloves 2, overlap joint is connected as a single entity；Reach, the water resistance entered in cable intermediate joint is interposed between outside；Avoid docking
The outer semiconducting layer and copper shield 1d of head position cause corrosivity to destroy；
S7：The reparation of restrictive coating：Heat-shrinkable T bush 3 is enclosed on shrinkage trident gloves 2, and by temperature-sensitive fluidize band 10 it is wrapped
The outside of heat-shrinkable T bush 3, temperature-sensitive fluidisation band 10 by external heat equipment 7b melted to form the external sheath layer isometrical with cable 1
1f, weld can be formed hard flexible complete jacket structure, make cable with cable sheath material perfect welding after cooling
Structure obtained complete and comprehensive recovery.
The metal electrode is set to silver solder 5；The welding rifle 6 melts to silver solder 5, makes conductor 1c slope quilts
Complete cladding, and solid contact surface is stacked out after the cooling period；
The material being set in semiconductive fluidisation band as cable inner semiconducting layer attribute is made.
The crosslinked polyetylene insulated fluidisation band is set to be made with cable insulation attribute identical insulating materials.
The shrinkage trident gloves 2 are set to the gum sleeve that silicon rubber is made.
Embodiment 1：
S1：Two cables are subjected to stripping according to drawing size, and handle the restrictive coating 1f in cable two ends, waterproof respectively
Layer 1e, copper shield 1d, main insulating layer 1b, interior semi-conductive layer 1a, conductor 1c；Then thermal sleeve 3 is inserted in cable 1 and in electricity
The end on cable both sides installs shrinkage trident gloves 2；
S2：The welding of cable conductor：30 degree of angle -45 degree angle is polished or is cut in the conductor 1c sections of two sections of cables
Slope, and to the conductor 1c slopes alignment alignment of two sections of cables after；SAPMAC method equipment 4 is installed, and SAPMAC method will be connected to
Cooling device 4a in equipment 4, is fixed by screws in the two ends of two sections of conductors；Provided with cold in cooling device, SAPMAC method equipment
But water；Start SAPMAC method equipment 4；Then carried out using welding rifle 6 and silver solder, two sections of conductor 1c slope is welded；
Heat in cooling water during welding in cooling-cycle apparatus 4, cooling device 4a, the band constantly circulated on conductor；
To avoid the interior semi-conductive layer 1a and main insulating layer 1b of cable body in welding by thermal damage, the conductor 1c after welding has
Contact that abundant resistance is small, close structure tensile property is good, will not produce contaminative impurity.
S3：The reparation of interior semi-conductive layer：Band is fluidized from customized semiconductive, it is directly enterprising in cable inner semiconducting layer 1a
The wrapped fluidisation of row, isometrical recovery；Well in advance semiconductive material cup is not used, technique is simpler.
S4：The reparation of main insulating layer：It is uniform wrapped in interior semiconductor layer from customized crosslinked polyetylene insulated fluidisation band
On 1a；Interior semi-conductive layer 1a it is wrapped fluidisation take to it is certain thickness after；Pressure bonding device 8 is inserted in exist Stress control
1.5MPa, then above pressure bonding device 8；Heater 7b and Temperature-controlled appliance 7 are installed, and temperature control 170
Between DEG C；Cable internal control warming-up device 7c is installed at the joint two ends in conductor 1c sections in addition, and by current control in 500A；
Then sensed by internal control warming-up device, the temperature in conductor is adjusted pressure and temperature；Again by pressurization in 1.5 hours, control
Wen Hou；Take off all control devices, and sanding and polishing is carried out to main insulating layer 1b surfaces, spray is then followed by and touches semiconductive varnish, around
The customized semi-conductive tape of bag；
S5：Copper shield is repaired：The flexible copper guipure worked out by fine copper, half it is overlapping by outer semiconducting layer it is complete around
Bag, and with the copper shield 1d of cable fully overlap and fixed；
S6：The reparation of waterproof layer：By at the conductor 1c sections of cable two ends wind adhesive waterproof tape 9, and with it is mounted
Shrinkage trident gloves 2, overlap joint is connected as a single entity；Reach, the water resistance entered in cable intermediate joint is interposed between outside；Avoid docking
The outer semiconducting layer and copper shield 1d of head position cause corrosivity to destroy；
S7：The reparation of restrictive coating：Heat-shrinkable T bush 3 is enclosed on shrinkage trident gloves 2, and by temperature-sensitive fluidize band 10 it is wrapped
The outside of heat-shrinkable T bush 3, temperature-sensitive fluidisation band 10 by external heat equipment 7b melted to form the external sheath layer isometrical with cable 1
1f, weld can be formed hard flexible jacket structure, obtain the structure of cable with cable sheath material welding after cooling
Comprehensive recovery is arrived.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Any modifications, equivalent substitutions and improvements made within principle etc., should be included in the scope of the protection.
Claims (5)
1. a kind of intermediate joint of electric cable welding and renovation technique, it is characterised in that：The technique comprises the following steps：
S1：Cable is subjected to stripping according to drawing size, and restrictive coating respectively in processing cable two ends, waterproof layer, copper shield,
Main insulating layer, interior semi-conductive layer, conductor；Then thermal sleeve is inserted in the cable and installs shrinkage in the end on cable both sides
Trident gloves；
S2：The welding of cable conductor：Slope is made in the cross-sectional area of conductor of two sections of cables, and to the slope of two sections of cable conductors
Alignment is alignd；Then SAPMAC method equipment, and the cooling device that will be connected to SAPMAC method equipment are installed, on two sections of conductors
Afterwards；Start SAPMAC method equipment；Carried out using welding rifle and metal electrode, the slope of two sections of conductors is welded；
S3：The reparation of interior semi-conductive layer：Band is fluidized from customized semiconductive, is carried out directly in cable inner semiconducting layer wrapped
Fluidisation, isometrical recovery；
S4：The reparation of main insulating layer：It is uniform wrapped on interior semi-conductive layer from customized crosslinked polyetylene insulated fluidisation band；
Interior semi-conductive layer it is wrapped it is crosslinked polyetylene insulated fluidisation take to it is certain thickness after；Pressure bonding device is inserted in, then it is multiple in pressure
Above clutch；Install heater and Temperature-controlled appliance, and Stress control in 1-2Mpa, temperature control 100 DEG C~
Between 200 DEG C；Install cable internal control warming-up device at the joint two ends of cross-sectional area of conductor in addition, and by current control 200A~
Between 800A；Pressurizeed by 1-2h, after temperature control；Take off after all control devices, carry out main insulating layer surface sanding and polishing, then
Then semiconductive varnish, wrapped customized semi-conductive tape are touched in spray；
S5：Copper shield is recovered：The flexible copper guipure worked out by fine copper, half is overlapping completely wrapped by outer semiconducting layer, and
Carry out fully overlapping and fixed with the copper shield of cable；
S6：The reparation of waterproof layer：By at the cross-sectional area of conductor of cable two ends wind adhesive waterproof tape, and with mounted shrinkage trident
Gloves, overlap joint is connected as a single entity；Reach, the water resistance entered in cable intermediate joint is interposed between outside；
S7：The reparation of restrictive coating：Heat-shrinkable T bush is enclosed on into shrinkage trident hand to put, and by temperature-sensitive fluidize sheath reparation with it is wrapped
The outside of heat-shrinkable T bush, will be fluidized by external heat equipment and be formed and the isometrical external sheath layer of cable with thawing.
2. intermediate joint of electric cable is welded and renovation technique according to claim 1, it is characterised in that：The metal electrode
It is set to silver solder；The welding rifle melts to silver solder, conductor slope is completely coated, and stack out after the cooling period
Solid contact surface.
3. intermediate joint of electric cable is welded and renovation technique according to claim 1, it is characterised in that：It is described in semiconductive
The material that fluidisation band is set to as cable inner semiconducting layer attribute is made.
4. intermediate joint of electric cable is welded and renovation technique according to claim 1, it is characterised in that：The poly- second of crosslinking
Alkene insulation fluidisation band is set to be made with cable insulation attribute identical insulating materials.
5. intermediate joint of electric cable is welded and renovation technique according to claim 1, it is characterised in that：The shrinkage trident
Gloves are set to the gum sleeve that silicon rubber is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710339962.3A CN107123956A (en) | 2017-05-15 | 2017-05-15 | A kind of intermediate joint of electric cable welding and renovation technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710339962.3A CN107123956A (en) | 2017-05-15 | 2017-05-15 | A kind of intermediate joint of electric cable welding and renovation technique |
Publications (1)
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| CN107123956A true CN107123956A (en) | 2017-09-01 |
Family
ID=59727585
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| CN201710339962.3A Pending CN107123956A (en) | 2017-05-15 | 2017-05-15 | A kind of intermediate joint of electric cable welding and renovation technique |
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Cited By (5)
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| CN107732803A (en) * | 2017-10-19 | 2018-02-23 | 中国水利水电第十四工程局有限公司 | A kind of restorative procedure of heavy in section low voltage single core flexible cable |
| CN110364902A (en) * | 2019-08-12 | 2019-10-22 | 江苏亨通电力电缆有限公司 | Middle pressure fireproof cable connection method and middle pressure fireproof cable |
| CN113937589A (en) * | 2021-11-05 | 2022-01-14 | 华能安阳能源有限责任公司 | Cable connection construction process |
| CN114700751A (en) * | 2022-03-28 | 2022-07-05 | 宁波东方电缆股份有限公司 | Conductor reducing butt welding process |
| CN115241711A (en) * | 2022-07-27 | 2022-10-25 | 杭州德鸿电力科技有限公司 | Cable fusion type joint hot-melt welding device and process thereof |
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| CN113937589A (en) * | 2021-11-05 | 2022-01-14 | 华能安阳能源有限责任公司 | Cable connection construction process |
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| CN114700751A (en) * | 2022-03-28 | 2022-07-05 | 宁波东方电缆股份有限公司 | Conductor reducing butt welding process |
| CN115241711A (en) * | 2022-07-27 | 2022-10-25 | 杭州德鸿电力科技有限公司 | Cable fusion type joint hot-melt welding device and process thereof |
| CN115241711B (en) * | 2022-07-27 | 2023-05-05 | 杭州德鸿电力科技有限公司 | Cable fusion type joint hot-melt welding device and process thereof |
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