CN107994517B - 10kV to 35kV cable craft fusing type straight coupling production method - Google Patents
10kV to 35kV cable craft fusing type straight coupling production method Download PDFInfo
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- CN107994517B CN107994517B CN201711172751.1A CN201711172751A CN107994517B CN 107994517 B CN107994517 B CN 107994517B CN 201711172751 A CN201711172751 A CN 201711172751A CN 107994517 B CN107994517 B CN 107994517B
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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
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Abstract
The present invention relates to technical field of cable connection, the production method for referring specifically to a kind of 10kV to 35kV cable craft fusing type straight coupling, this method successively carries out core welding, semi-conductive layer in joint, three layers of fusion of insulating layer and outer semiconducting layer, winding copper mesh, wrapped adhesive waterproof tape, restores steel-tape armouring and outer jacket, it can disposably realize the welding reparation of core cable outer semiconducting layer, insulating layer and interior semi-conductive layer, easily operated and producing efficiency is high, and obtained straight coupling has preferable dielectric strength and waterproofness.
Description
Technical field
The present invention relates to technical field of cable connection, a kind of 10kV is referred specifically to 35kV cable craft fusing type straight coupling
Production method.
Background technique
As China's Development of China's Urbanization constantly promotes, cable run has the tendency that gradually replacing high voltage overhead lines.Distribution electricity
A straight coupling will be arranged every corresponding distance that is, on cable run generally at 600 meters or so in the length of the every disk of cable, can
See that its quantity is quite huge, and at straight coupling is often place most weak in cable run, therefore straight coupling
Quality is to determine a key factor of cable run safety work.
Existing straight coupling is broadly divided into following three types: insulation strip lap formula, thermal shrinkage type and shrinkage prefabricated,
But the straight coupling failure rate of above-mentioned three types is relatively high.Number is all three cores to cable used in country's distribution greatly absolutely at present
, once cable straight coupling, which occurs, occurs breakdown accident, primary repair and resection w can not restore the insulation performance of connector, it is necessary to change new
Cable serve as connector.Additionally due to the cable arrangements in cable duct/well are more intensive, the connector on a cable breaks down
Can also ignite other cables after on fire, be easy to lead to major accident.
That causes existing straight coupling failure mainly has following two points factor: (1) because of cable major insulation and connector stress cone
For two media and there is overlap joint interface, insulation performance holds cable tightly by EP rubbers or the stress cone itself of silicone rubber material
Major insulation maintains.Because the variation for flowing through electric current is expanded with heat and contract with cold there are a degree of in cable operational process, and cable master is exhausted
Edge is different from the coefficient of expansion of connector stress cone, and with the aging of stress cone, enclasping force also can accordingly decline and then and cable
Major insulation generates gap, induces shelf depreciation until breakdown accident occurs；(2) environment is more moist in cable duct/well, existing straight
Pass joint disperses electric field mainly by stress cone, and 10kV cannot use metal waterproof connector to 35kV cable, and looping can only be leaned on anti-
Glue band waterproof, waterproof performance can be gradually reduced adhesive waterproof tape in use, and steam will enter cable master for a long time
Cable and junction malfunction is caused in the gap of insulation and stress cone.
Summary of the invention
It is straight to 35kV cable craft fusing type that the present invention proposes a kind of 10kV to solve problems of the prior art
The production method of pass joint quick Fabrication can provide superior isolation intensity and waterproofness at the construction field (site) by this method
Cable straight coupling.
The production method of 10kV of the present invention to 35kV cable craft fusing type straight coupling includes the following steps:
1) cable outer layer cuts stripping: radially sawing out two fractures respectively in the butt end of two cables, from two cables
Incision position successively strip the outer jacket that length is sequentially reduced, steel sheath, sheath and cut off exposed filled layer.
2) core cable cuts stripping and refine: the core cable in cable is successively stripped from incision position to the copper shield that length is sequentially reduced
The end of outer semiconducting layer and interior semi-conductive layer is whittled into smooth transition by layer, outer semiconducting layer, insulating layer and interior semi-conductive layer
Ramped shaped is simultaneously smooth with 600 mesh belt sandings, and the end of insulating layer is whittled into pencil head, polishes smooth with 800# sand paper and washes
Net drying, removes the insulation residual and polished surface on exposed interior semi-conductive layer surface with 600 mesh abrasive bands, then by exposed outer half
Conductive layer, insulating layer and interior semi-conductive layer are thermally shielded protection with the polytetrafluoroethylene (PTFE) adhesive tape opposite direction multilayer that is wrapped；With 240 mesh sand
The oxide layer blend compounds band looping that exposed core surface and incision position are removed with polishing is closed.
3) tubing is default: covering upper two heat-shrink tubes on cable, and respectively covers upper one on three core cables inside cable
A silicon rubber dirt-proof boot.
4) welding of core: the adhesive tape outside removal core is inserted into welding after carrying out alignment and heating and dehumidification processing to core
Mold is fixed, and metal powder identical with core material is filled into weld mold and carries out exothermic weld, then beats weld
It is milled to isometrical with former cable core.
5) looping of band: the High temperature-resistanadhesive adhesive tape that removal is wrapped in outside outer semiconducting layer, insulating layer and interior semi-conductive layer is adopted
Surface, which is formed, with semi-conductive layer in band identical with interior semi-conductive layer material close looping core surface and original is higher by former core cable
Within interior semi-conductive layer 1mm and two end cap excessively original in semi-conductive layer ramped shaped end interior semiconductive repair layer；Using with it is exhausted
Semiconductive repair layer in the close looping of the identical band of edge layer, semi-conductive layer and former insulating layer form surface and are higher by former insulation in original
The insulation repair layer at 5~8mm of layer and both ends and former insulating layer smooth transition, the excessively former insulating layer of the two end cap of the insulation repair layer
The end of pencil head；Using the close wrap insulation repair layer of band identical with outer semiconducting layer material, former insulating layer and original
Outer semiconducting layer surface forms thickness outer semiconductive repair layer identical with former outer semiconducting layer, the outer semiconductive repair layer
The end of the excessively former outer semiconducting layer ramped shaped of two end cap.
6) welding of semi-conductive layer, insulating layer and outer semiconducting layer restores in: silicon rubber dirt-proof boot being moved to outer partly lead and is repaired
It at cladding, completely coats and wraps tightly outer semiconductive repair layer, wrap up one layer of aluminium foil and outside silicon rubber dirt-proof boot with acid imide glue
Band looping is fixed, then is locked with shaping die to be placed in cartridge heater and be heated to fuse and be constituted outer semiconductive repair layer, exhausted
The band of edge reparation layer and interior semi-conductive layer is made outer using the core cable section that high-frequency induction heating apparatus heats close cartridge heater both ends
Semi-conductive layer in semiconductive repair layer and former outer semiconducting layer, insulation repair layer and former repair layer, interior semiconductive repair layer and original
It combines together, pressure when terminating heating in shaping die must not be lower than 1.8MPa.
7) recovery of copper shield: removing cartridge heater, shaping die, acid imide adhesive tape, aluminium foil and silicon rubber dirt-proof boot, uses
Copper mesh distinguishes looping and connects the native copper shielded layer on every core cable and fix copper mesh both ends with constant force spring, then will with insulating tape
Three core cable looping bindings are integrated.
8) recovery of sheath: being wrapped over the former sheath on the outside of insulating tape and connecting two cables with adhesive waterproof tape,
Adhesive waterproof tape need to very be stretched when looping and half lap scarf joint winds multilayer, waterproof glue is uniformly then applied to adhesive waterproof tape
Surface is simultaneously covered and is evenly heated heat-shrink tube with a heat-shrink tube and shrinks it sufficiently and encapsulated the both ends of heat-shrink tube with adhesive waterproof tape.
9) connection of steel sheath: grinding off the antirust paint on two cable connection end raw steel sheath surfaces with 240 mesh abrasive bands, then with
Both ends and former Steel armor of cable layer overlapped copper braid over braid package heat-shrink tube and with constant force spring fixed copper braid over braid both ends, finally with
Insulating tape looping fixes two constant force springs.
10) it the recovery of outer jacket: is filled with the former outer jacket surface and looping of 600 mesh belt sanding, two cable connection ends
The former outer jacket of filling adhesive tape is tied on adhesive tape, then steel sheath after connecting with adhesive waterproof tape looping and two cables, when looping
Adhesive waterproof tape need to very be stretched and half lap scarf joint twines multilayer, adhesive waterproof tape surface is then uniformly applied to waterproof glue, and
Set is with another heat-shrink tube, and being evenly heated heat-shrink tube is shunk it sufficiently and encapsulated the both ends of heat-shrink tube with adhesive waterproof tape, finally
Multilayer is wound in pyrocondensation pipe surface half lap scarf joint with armoring tape.
The heating process of cartridge heater in the step 6) are as follows: uniformly heat up 20~30min to 100 DEG C and constant temperature 5~
10min, then slowly 15~25min to 185 DEG C of heating and 40~50min of constant temperature, cartridge heater are opened after being warming up to 100 DEG C or more
High-frequency induction heating apparatus exports 350A induction heating current to the core cable segment sync close to cartridge heater both ends under 380V voltage
It is heated.
The heat that weld gives off can effectively be obstructed with polytetrafluoroethylene (PTFE) adhesive tape looping and protect core cable, and it is heated after
It is not easy to stick together with interior semi-conductive layer, insulating layer and outer semiconducting layer, convenient for stripping.Silicon rubber dirt-proof boot can effective exclusion of water
Vapour and impurity make the good band of looping keep the cleanliness of national standard and apply certain pressure to band being fixed, aluminium
Foil is fixed on silicon rubber dirt-proof boot by acid imide adhesive tape resistant to high temperature, can play the role of uniform heat conduction.
Heat ecto-entad is passed to three kinds of bands by the way of step-up temperature in above-mentioned heating process by cartridge heater
Core can take into account the fusion of three kinds of bands and form fine and close outer semiconductive repair layer under the action of ambient pressure, insulation is repaired
Layer and interior semiconductive repair layer.High-frequency induction heating apparatus then directly acts on core, and heat is successively passed from core from inside to outside
Pass semi-conductive layer in original, former insulating layer and former outer semiconducting layer, semiconductive repair layer outer in this way and former outer semiconducting layer, insulation
Repair layer and former insulating layer, interior semiconductive repair layer with it is former in the intersection of semi-conductive layer be attained by required temperature and abundant
Welding combines, to disposably complete three layers of reparation of core cable.
Due to the outer semiconductive repair layer of above-mentioned technique fusing type straight coupling, insulation repair layer and interior semiconductive repair layer
The material of use is completely the same with former cable and welding is abundant, and there is no the declines of stress cone aging enclasping force, boundary in conventional connector
Discharge breakdown problem caused by face intakes.A whole set of production method successively carries out core welding, semi-conductive layer, insulating layer in joint
And three layers of fusion, winding copper mesh, wrapped adhesive waterproof tape, recovery steel-tape armouring and the outer jacket of outer semiconducting layer and etc., it uses
Equipment it is less, be relatively easy to operate and obtained straight coupling can preferably be connected with two original cables, and have compared with
Good dielectric strength and waterproof performance.It interior leads additionally, due to the outer semiconducting layer of cable core cable in manufacturing process, insulating layer and partly
Electric layer is repaired simultaneously, can greatly improve the producing efficiency of connector.
The production method of 10kV of the present invention to 35kV cable craft fusing type straight coupling is relatively easy to operate and make
High-efficient, obtained straight coupling has preferable dielectric strength and waterproofness.
Detailed description of the invention
Fig. 1: 10kV to 35kV cable structural schematic diagram；
Fig. 2: the straight coupling structural schematic diagram in heat welded before semi-conductive layer, insulating layer and outer semiconducting layer；
Enlarged structure schematic diagram in Fig. 3: Fig. 2 at A；
Fig. 4: the straight coupling structural schematic diagram after sheath is repaired is completed；
Fig. 5: the straight coupling structural schematic diagram after connecting steel sheath；
Fig. 6: the straight coupling structural schematic diagram after outer jacket is repaired is completed；
Enlarged structure schematic diagram in Fig. 7: Fig. 6 at B.
Wherein: 1- outer jacket, 2- steel sheath, 3- sheath, 4- filled layer, 5- copper shield, 6- outer semiconducting layer, 7- are exhausted
Semi-conductive layer in edge layer, 8-, 9- core, 10- heat-shrink tube, 11- silicon rubber dirt-proof boot, semiconductive repair layer, 13- insulation in 12-
The outer semiconductive repair layer of repair layer, 14-, 15- aluminium foil, 16- acid imide adhesive tape, 17- shaping die, 18- copper mesh, 19- constant force bullet
Spring, 20-PVC insulating tape, 21- adhesive waterproof tape, 22- epoxy resin waterproof glue, 23- copper braid over braid, 24- fill adhesive tape, 25-
Armoring tape.
Specific embodiment
In the following with reference to the drawings and specific embodiments to 10kV of the present invention to 35kV cable craft fusing type straight coupling
Production method be described further, Fig. 1 be 10kV to 35kV cable structural schematic diagram.Hereinafter certain places are and reparation
Material is mutually distinguished added " original " word, such as " former outer semiconducting layer before the structure title being present in cable originally
6 " refer to same structure with " outer semiconducting layer 6 ".
High-frequency induction heating apparatus used in embodiment is the DD-25I of Shanghai Ju Bao Electromechanical Technology Co., Ltd production
Type high frequency induction heater；The cartridge heater used is customized by relevant manufacturers by required size, and equipped with Intelligent temperature control box and pressure
Force snesor；The adhesive waterproof tape used is the round-the-clock professional waterproof insulation tape of 2228 type of Scotch of 3M company；It uses
It fills the cable accessory that adhesive tape 24 is the graceful material Science and Technology Ltd. production of Shenzhen's Puri and fills adhesive tape.
Embodiment 1
A kind of 10kV to 35kV cable craft fusing type straight coupling production method, including the following steps:
1) cable outer layer cuts stripping: radially sawing out two fractures, two cables point respectively in the butt end of two cables
The outer jacket 1 of 1000mm and 800mm is not inwardly stripped from cable incision position.50mm steel armour is measured outward from 1 incision position of outer jacket
Layer 2 is retained, remaining is stripped.It finally measures 100mm sheath 3 outward from 1 incision position of outer jacket to be retained, remaining stripping
It removes.It cuts off exposed filled layer 4 and prevents from aoxidizing with the end of PVC tape looping steel sheath 2.
2) core cable cuts stripping and refine: from cable incision position inwardly strips the copper shield 5 of 300mm, the outer of 200mm is partly led
The interior semi-conductive layer 8 of electric layer 6, the insulating layer 7 of 75mm and 60mm makes the exposure of core 9, and with 5 end of PVC tape looping copper shield
Portion is with loosening.The end of outer semiconducting layer 6 and interior semi-conductive layer 8 is whittled into the ramped shaped of smooth transition and with 600 mesh abrasive bands
Polishing is smooth, the end of insulating layer 7 is whittled into pencil head, then the smooth and clean drying with the polishing of 800# sand paper.With 600 mesh sand
The insulation residual and polished surface taken except exposed 8 surface of interior semi-conductive layer, then by exposed outer semiconducting layer 6, insulating layer 7
It is wrapped two layers with interior semi-conductive layer 8 with polytetrafluoroethylene (PTFE) adhesive tape opposite direction and is thermally shielded protection.Except being gone with 240 mesh belt sandings
9 surface of core of dew and the oxide layer of incision position are simultaneously closed with PVC tape looping.
3) tubing is default: covering upper two heat-shrink tubes 10 on cable, and respectively covers on three core cables inside cable
One silicon rubber dirt-proof boot 11.
4) welding of core: the PVC tape outside removal core 9 is inserted into after carrying out alignment and heating and dehumidification processing to core 9
Weld mold is fixed, and filling metal powder identical with 9 material of core carries out exothermic weld in case weld mold, then will welding
Place is polishing to isometrical with former cable core 9.
5) looping of band: the polytetrafluoroethylene (PTFE) that removal is wrapped in outside outer semiconducting layer 6, insulating layer 7 and interior semi-conductive layer 8
High temperature-resistanadhesive adhesive tape forms table using semi-conductive layer 8 in the close looping core 9 of band identical with interior 8 material of semi-conductive layer and original
Face be higher by semi-conductive layer 8 in original be no more than 1mm and in two end cap original excessively the ramped shaped end of semi-conductive layer 8 interior semiconductive reparation
Layer 12；Using semiconductive repair layer 12, original in the close looping of band identical with insulating layer 7 (specially crosslinked polyethylene material)
Interior semi-conductive layer 8 and former insulating layer 7 form that surface is higher by former 7 surface 5mm of insulating layer and both ends and former insulating layer 7 seamlessly transit
Insulate repair layer 13, the end of the two end cap for the repair layer 13 that insulate 7 pencil head of former insulating layer excessively；Using with outer semiconducting layer 6
The close wrap insulation repair layer 13 of the identical band of material, former insulating layer 7 and former 6 surface of outer semiconducting layer are formed outside thickness and original
The identical outer semiconductive repair layer 14 of semi-conductive layer 6, the two end cap of outer semiconductive repair layer 14 6 ramped shaped of former outer semiconducting layer excessively
End.
6) welding of semi-conductive layer, insulating layer and outer semiconducting layer restores in: silicon rubber dirt-proof boot 11 being moved to and is partly led outside
At repair layer 14, completely coat and wrap tightly it is outer partly lead repair layer 14, wrapped up outside silicon rubber dirt-proof boot 11 one layer of aluminium foil 15 and with
16 looping of acid imide adhesive tape is fixed, then is locked (as shown in Figure 2,3) with shaping die 17, be placed in cartridge heater and heat
To fuse the band for being constituted outer semiconductive repair layer 14, insulation repair layer 13 and interior semi-conductive layer 8, filled using high-frequency induction heating
Set the core cable section for heating close to cartridge heater both ends make outer semiconductive repair layer 14 and former outer semiconducting layer 6, insulation repair layer 13 with
Former repair layer 7, interior semiconductive repair layer 12 and semi-conductive layer 8 in original combine together, terminate pressure when heating in shaping die
Not less than 1.8MPa.
The heating process of cartridge heater are as follows: uniformly 20min to 100 DEG C of heating and constant temperature 8min, subsequent slowly heating 20min is extremely
185 DEG C and constant temperature 40min；Cartridge heater is opened high-frequency induction heating apparatus after being warming up to 100 DEG C or more and is exported under 380V voltage
350A induction heating current (delays the core cable segment sync induction heating 60min close to cartridge heater both ends in cartridge heater by 100 DEG C
Slowly be warming up to 185 DEG C 20min and cartridge heater 185 DEG C of constant temperature 40min the two stages simultaneously to close to cartridge heater both ends
Core cable section heated).
7) it is anti-that cartridge heater, shaping die 17, acid imide adhesive tape 16, aluminium foil 15 and silicon rubber the recovery of copper shield: are removed
Dirt set 11 checks whether outer 14 surface of semiconductive repair layer is smooth, distinguishes looping with copper mesh 18 later and connects on every core cable
Native copper shielded layer 5 simultaneously fixes copper mesh both ends with constant force spring 19, then three core cable loopings are tied to one with PVC insulating tape 20
Body.
8) recovery of sheath: as shown in figure 4, being wrapped over 20 outside of PVC insulating tape with adhesive waterproof tape 21 and connecting two
The former sheath 3 of bar cable, when looping, need to very stretch adhesive waterproof tape 21 and half lap scarf joint winds three layers, then by asphalt mixtures modified by epoxy resin
Rouge waterproof glue 22 is uniformly applied to 21 surface of adhesive waterproof tape and covers with a heat-shrink tube 10, and being evenly heated heat-shrink tube 10 fills it
Divide the both ends shunk and encapsulate heat-shrink tube 10 with adhesive waterproof tape 21.
9) connection of steel sheath: as shown in figure 5, removal is wrapped in the PVC tape of 2 end of raw steel sheath and with 240 mesh sand
Band grinds off the antirust paint on surface, and with both ends and raw steel sheath 2, overlapped that copper braid over braid 23 wraps up heat-shrink tube 10 and with constant force spring
19 fixed copper braid over braid, 23 both ends, then two constant force springs 19 are fixed to prevent loosening with 20 looping of PVC insulating tape.
10) recovery of outer jacket: as shown in Figure 6,7, with the original of 600 mesh belt sanding, two long 150mm of cable connection end
1 surface of outer jacket and looping fill adhesive tape 24, then are tied on steel sheath after being connected with 21 looping of adhesive waterproof tape and two cables
The outer jacket 1 of adhesive tape 24 is filled, when looping very need to stretch adhesive waterproof tape 21 and three layers of half lap scarf joint winding, then uses epoxy
Resin waterproof glue 22 is uniformly applied to 21 surface of adhesive waterproof tape and covers with another heat-shrink tube 10, and being evenly heated heat-shrink tube 10 makes
It is sufficiently shunk and is encapsulated the both ends of heat-shrink tube 10 with adhesive waterproof tape 21, finally with armoring tape 25 in 10 surface half lap scarf joint of heat-shrink tube
4 layers of winding.
Embodiment 2
A kind of 10kV to 35kV cable craft fusing type straight coupling production method, described in the present embodiment and embodiment 1
Remaining step is completely the same in addition to method is different except step 5) and 6), is in particular in:
Insulation 13 surface of repair layer is higher by former 7 surface 6mm of insulating layer in step 5), the heating process of cartridge heater in step 6)
Are as follows: uniformly 24min to 100 DEG C of heating and constant temperature 5min, subsequent slowly 25min to 185 DEG C of heating and constant temperature 46min；Cartridge heater
Unlatching high-frequency induction heating apparatus exports 350A induction heating current under 380V voltage and adds to close after being warming up to 100 DEG C or more
The core cable section induction heating 71min at hot cylinder both ends.
Embodiment 3
A kind of 10kV to 35kV cable craft fusing type straight coupling production method, described in the present embodiment and embodiment 1
Remaining step is completely the same in addition to method is different except step 5) and 6), is in particular in:
Insulation 13 surface of repair layer is higher by former 7 surface 8mm of insulating layer in step 5), the heating process of cartridge heater in step 6)
Are as follows: uniformly 30min to 100 DEG C of heating and constant temperature 10min, subsequent slowly 15min to 185 DEG C of heating and constant temperature 50min；Cartridge heater
Unlatching high-frequency induction heating apparatus exports 350A induction heating current under 380V voltage and adds to close after being warming up to 100 DEG C or more
The core cable section induction heating 65min at hot cylinder both ends.
National smart grid equipment for power transmission and distribution Quality Supervision and Inspection Center (Guangdong) is to according to 3 embodiment the method systems
10kV to the 35kV cable craft fusing type straight coupling made is according to GB/T 12706.4-2008 " voltage rating 1kV (Um=
1.2kV) arrive 35kV (Um=40.5kV) the 4th part of extrusion insulating power cable and attachment: voltage rating 6kV (Um=7.2kV) it arrives
35kV(Um=40.5kV) electric cable fitting test requirements document " as defined in method detected, inspection project and the results are shown in Table 1.
As can be seen from Table 1, institute's seizure test project meets the requirements, and shows 10kV to the 35kV cable prepared by the method for the invention
The properties of technique fusing type straight coupling are up to state standards.
Table 1: project and result are examined
Claims (2)
1. a kind of 10kV is to the production method of 35kV cable craft fusing type straight coupling, characterized in that it comprises the following steps:
1) cable outer layer cuts stripping: in the butt end of two cables two fractures is radially sawed out respectively, from the disconnected of two cables
Mouthful place is layer-by-layer to be stripped the outer jacket that length is sequentially reduced, steel sheath, sheath and cuts off exposed filled layer；
2) core cable cuts stripping and refine: the core cable in cable is successively stripped from incision position copper shield that length is sequentially reduced,
The end of outer semiconducting layer and interior semi-conductive layer is whittled into the oblique of smooth transition by outer semiconducting layer, insulating layer and interior semi-conductive layer
Ramp shaped is simultaneously smooth with 600 mesh belt sandings, and the end of insulating layer is whittled into pencil head, polishes smooth with 800# sand paper and cleans
Drying, removes the insulation residual and polished surface on exposed interior semi-conductive layer surface with 600 mesh abrasive bands, then outer partly leads exposed
Electric layer, insulating layer and interior semi-conductive layer are thermally shielded protection with the polytetrafluoroethylene (PTFE) adhesive tape opposite direction multilayer that is wrapped；With 240 mesh abrasive bands
The oxide layer blend compounds band looping that polishing removes exposed core surface and incision position is closed；
3) tubing is default: covering upper two heat-shrink tubes on cable, and respectively covers a upper silicon on three core cables inside cable
Boot seal；
4) welding of core: the adhesive tape outside removal core is inserted into weld mold after carrying out alignment and heating and dehumidification processing to core
It is fixed, metal powder identical with core material is filled into weld mold and carries out exothermic weld, is then polishing to weld
It is isometrical with former cable core；
5) looping of band: the High temperature-resistanadhesive adhesive tape that is wrapped in outside outer semiconducting layer, insulating layer and interior semi-conductive layer of removal, using with
Semi-conductive layer forms surface and is higher by half in former core cable in the identical band close looping core surface of interior semi-conductive layer material and original
Within conductive layer 1mm and two end cap excessively original in semi-conductive layer ramped shaped end interior semiconductive repair layer；Using with insulating layer
Semiconductive repair layer in the identical close looping of band, semi-conductive layer and former insulating layer form surface and are higher by former insulating layer 5 in original
The insulation repair layer at~8mm and both ends and former insulating layer smooth transition, the excessively former insulating layer lead of the two end cap of the insulation repair layer
The end of written shape；It is outer using the close wrap insulation repair layer of band identical with outer semiconducting layer material, former insulating layer and original
Semi-conductive layer surface formation thickness outer semiconductive repair layer identical with former outer semiconducting layer, the two of the outer semiconductive repair layer
The end of the excessively former outer semiconducting layer ramped shaped of end cap；
6) welding of semi-conductive layer, insulating layer and outer semiconducting layer restores in: silicon rubber dirt-proof boot being moved to and partly leads repair layer outside
Place, completely coats and wraps tightly outer semiconductive repair layer, wraps up one layer of aluminium foil and outside silicon rubber dirt-proof boot with acid imide adhesive tape packet
Fixation is twined, then is locked with shaping die to be placed in cartridge heater and heat to fuse and be constituted outer semiconductive repair layer, insulate and repair
The band of cladding and interior semi-conductive layer, heating the core cable section close to cartridge heater both ends using high-frequency induction heating apparatus makes partly to lead outside
In electric repair layer and former outer semiconducting layer, insulation repair layer and former repair layer, interior semiconductive repair layer and original semi-conductive layer melt for
One, pressure when terminating heating in shaping die must not be lower than 1.8Mpa；
7) recovery of copper shield: cartridge heater, shaping die, acid imide adhesive tape, aluminium foil and silicon rubber dirt-proof boot are removed, copper mesh is used
Looping connects the native copper shielded layer on every core cable and with the fixed copper mesh both ends of constant force spring respectively, then with insulating tape by three
The binding of core cable looping is integrated；
8) the former sheath on the outside of insulating tape and connecting two cables, looping the recovery of sheath: are wrapped over adhesive waterproof tape
When adhesive waterproof tape need to very be stretched and half lap scarf joint winding multilayer, waterproof glue is then uniformly applied to adhesive waterproof tape surface
And set, with a heat-shrink tube, being evenly heated heat-shrink tube shrinks it sufficiently and with the both ends of adhesive waterproof tape encapsulating heat-shrink tube；
9) connection of steel sheath: the antirust paint on two cable connection end raw steel sheath surfaces is ground off, then with 240 mesh abrasive bands with both ends
With former Steel armor of cable layer overlapped copper braid over braid package heat-shrink tube and with constant force spring fixed copper braid over braid both ends, finally with insulation
Adhesive tape looping fixes two constant force springs；
10) recovery of outer jacket: glue is filled with the former outer jacket surface and looping of 600 mesh belt sanding, two cable connection ends
It is tied with the former outer jacket of filling adhesive tape on band, then steel sheath after connecting with adhesive waterproof tape looping and two cables, needs when looping
Adhesive waterproof tape is very stretched and half lap scarf joint winds multilayer, adhesive waterproof tape surface is then uniformly applied to waterproof glue, and
Set is with another heat-shrink tube, and being evenly heated heat-shrink tube is shunk it sufficiently and encapsulated the both ends of heat-shrink tube with adhesive waterproof tape, finally
Multilayer is wound in pyrocondensation pipe surface half lap scarf joint with armoring tape.
2. 10kV as described in claim 1 is to the production method of 35kV cable craft fusing type straight coupling, which is characterized in that
The heating process of cartridge heater in the step 6) are as follows: it uniformly heats up 20~30min to 100 DEG C and 5~10min of constant temperature, it is then slow
Slow 15~25min to 185 DEG C of heating and 40~50min of constant temperature, cartridge heater open high-frequency induction heating after being warming up to 100 DEG C or more
Device exports 350A induction heating current under 380V voltage and heats to the core cable segment sync close to cartridge heater both ends.
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| CN201711172751.1A CN107994517B (en) | 2017-11-22 | 2017-11-22 | 10kV to 35kV cable craft fusing type straight coupling production method |
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| CN201711172751.1A CN107994517B (en) | 2017-11-22 | 2017-11-22 | 10kV to 35kV cable craft fusing type straight coupling production method |
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| CN107994517B true CN107994517B (en) | 2019-08-09 |
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| CN111082278A (en) * | 2019-07-22 | 2020-04-28 | 宁波中缆电力科技有限公司 | Manufacturing process and structure of power cable T-shaped intermediate joint |
| CN110932049A (en) * | 2019-11-15 | 2020-03-27 | 东莞市输变电工程公司 | Combustion connection method for cable |
| CN112038790B (en) * | 2020-08-05 | 2021-08-06 | 瑞邦电力科技有限公司 | Prefabricated fusion-spliced cable insulation joint and manufacturing method thereof |
| 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 |
| CN113744932A (en) * | 2021-09-08 | 2021-12-03 | 黄石市深博电气有限公司 | Process method for recovering welding type cable outer semi-conductive layer |
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| CN113690808B (en) * | 2021-10-25 | 2022-02-22 | 国网天津市电力公司电力科学研究院 | Outer sheath breaking and repairing method used in repair of high-voltage cable buffer layer |
| CN114094423B (en) * | 2021-11-05 | 2022-08-16 | 瑞邦电力科技有限公司 | Manufacturing process of straight-through joint of crosslinked cable |
| CN114566312A (en) * | 2022-03-22 | 2022-05-31 | 南方电网科学研究院有限责任公司 | Polypropylene cable and insulating layer repairing method and application thereof |
| CN117240018B (en) * | 2023-11-14 | 2024-03-08 | 天津普友机电设备股份有限公司 | Joint process of stator winding wire and power cable of submersible motor |
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| CN100578689C (en) * | 2005-08-12 | 2010-01-06 | 3M创新有限公司 | Self-welding insulation clad band |
| CN201655984U (en) * | 2010-04-12 | 2010-11-24 | 上海机场（集团）有限公司 | Primary cable joint of light |
| CN105845261B (en) * | 2016-06-13 | 2017-11-10 | 湖北华特红旗电缆有限公司 | Twisted polyethylene cable and its restorative procedure are pressed in one kind |
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