CN109286083A - A kind of three-core cable welded joint and its mounting process - Google Patents
A kind of three-core cable welded joint and its mounting process Download PDFInfo
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- CN109286083A CN109286083A CN201811142048.0A CN201811142048A CN109286083A CN 109286083 A CN109286083 A CN 109286083A CN 201811142048 A CN201811142048 A CN 201811142048A CN 109286083 A CN109286083 A CN 109286083A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/021—Soldered or welded connections between two or more cables or wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/026—Soldered or welded connections comprising means for eliminating an insulative layer prior to soldering or welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
- H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
-
- 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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- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/16—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for repairing insulation or armouring of cables
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cable Accessories (AREA)
- Processing Of Terminals (AREA)
Abstract
The invention discloses a kind of three-core cable welded joints, it is related to power transmission technology field, the connector includes two cables interconnected and the interior repair layer group for repairing cable and coset of dispatching workers to do on-site repairs, every cable, which includes three, leads core and is coated on three external protection groups led on the outside of core, external protection group successively includes inner restrictive coating, armor, external sheath layer, coset of dispatching workers to do on-site repairs successively includes inner sheath repair layer, armouring repair layer, oversheath repair layer, oversheath repair layer is set as heat-shrinkable T bush, overlapped that both ends are arranged with cold shrink sleeve for external sheath layer and oversheath repair layer.The elastic contractile force of cold shrink sleeve is big, permanent elasticity cladding is able to carry out to the lap-joint at oversheath repair layer both ends, to form interference fit for a long time, effectively increase the relative stability between the both ends and external sheath layer of oversheath repair layer, and cold shrink sleeve can fit in securely the outside of external sheath layer, and then effectively improve the waterproof performance of cable after repair.
Description
Technical field
The present invention relates to power transmission technology fields, more particularly, to a kind of three-core cable welded joint and its erector
Skill.
Background technique
Fusion formula cable connector is that a kind of utilization is locally heated to and is enough to melt or melt the ends of two sections of cable cores to complete
It connects, forms the permanent splice of a continuous cable, be usually applied to the extension and reparation of cable.
In the prior art, the connecting of formula cable connector is fused the following steps are included: 1) peelling off the end of two sections of cables
Surrounding layer；2) conductor of two sections of cables is packed into graphite jig, is integrated by the copper liquid fusion of melting；3) pass through polyethylene
Insulating tape repairs the insulating layer of cable.
Wherein, during two conductors of exothermic weld, keep cable temperature excessively high without reliable cooling device, be easy
Lead to cable plastics aging and influences service life.And it is easy between polyethylene insulation band there are gap to put to generate part
Electricity influences the electric property of cable.
And three-core cable welded joint, after three groups being led core and being repaired one by one, it is also necessary to continue to repair lead it is outer on the outside of core
Restrictive coating, in the prior art by using the contraction of heat-shrink tube to repair external sheath layer.But it leads core and easily sends out due to three groups
Raw offset, at the same cable it is flexible under, the simple easy leak of lap-joint that will will lead to heat-shrink tube and cable using heat-shrink tube, into
And its repairing effect is influenced, have much room for improvement.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of three-core cable welded joint, have
Good waterproof performance.
To achieve the above object, the present invention provides the following technical scheme that
A kind of three-core cable welded joint, interior repair layer group including two cables interconnected and for repairing cable and
It dispatches workers to do on-site repairs coset, the every cable, which includes three, leads core and be coated on three external protection groups led on the outside of core, described
Interior repair layer group and coset of dispatching workers to do on-site repairs, which are respectively used to repair, leads core and external protection group, and the external protection group successively includes interior shield
Jacket layer, armor, external sheath layer, the coset of dispatching workers to do on-site repairs successively include for repairing the inner sheath repair layer of inner restrictive coating, using
In armouring repair layer, the oversheath repair layer for repairing external sheath layer of repairing armor, the oversheath repair layer setting
For heat-shrinkable T bush, overlapped that both ends are arranged with cold shrink sleeve for the external sheath layer and oversheath repair layer.
By using above-mentioned technical proposal, the elastic contractile force of cold shrink sleeve is big, to the overlap joint at oversheath repair layer both ends
Place is able to carry out permanent elasticity cladding, to form interference fit for a long time, effectively increases the both ends of oversheath repair layer and outer
Relative stability between restrictive coating, and cold shrink sleeve can fit in securely the outside of external sheath layer, and then effectively improve
The waterproof performance of cable after repair.
The present invention is further arranged to: the core of leading successively includes conductor, interior semi-conductive layer, insulating layer, outer semiconducting layer
And copper shield, the be connected outer sheath of part of two conductors is equipped with installation set, if the side wall of the installation set is through having
Dry deflector hole.
By using above-mentioned technical proposal, by the way that the both ends of two conductors are inserted in installation set, so that it will not loose, into
And it is aligned and ensure that the bonding strength of pad, for two conducting wires during exothermic weld, metal copper liquid is by two conductors
Again interconnected meanwhile, it is capable to make conductor and installation set solid out of deflector hole flows between installation set and conductor hole
Surely it is connected as one, increases the conductive area of conductor and reduce calorific value, enhance the mechanical strength of two conductor connections.This
Outside, installation set can prevent from damaging conductor when polishing crator.
The present invention is further arranged to: the interior repair layer group successively includes interior semiconductive repair layer, insulation repair layer, outer
Semiconductive repair layer, copper shield repair layer, the interior semiconductive repair layer, insulation repair layer, outer semiconductive repair layer, copper shield
Repair layer, which is all made of wrapped mode and wraps up and repair, leads core.
By using above-mentioned technical proposal, corresponding layer in core will be led by wrapped mode and repaired, there is fitting
The features such as degree is high, fastness is strong, and by wrapped mode, without being inserted in excessive corresponding reparation set before welding two conductors
Pipe, mode of operation are more simple and effective.
The present invention is further arranged to: the interior semiconductive repair layer is formed by semiconductive polyethylene is wrapped, described outer
Semiconductive repair layer is formed by semiconductive self-adhesive tape is wrapped.
By using above-mentioned technical proposal, under conditions of meeting reparation material, semiconductive self-adhesive tape has self-adhesion function,
It is fixed without fixture or special process, it is easy to operate.
The present invention is further arranged to: the insulation repair layer is formed using insulation pyrocondensation belt is wrapped, and the insulation is repaired
Layer can voluntarily be shunk by heating to eliminate interfacial gap and fuse with interior semiconductive repair layer, insulating layer and to form one.
By using above-mentioned technical proposal, insulation pyrocondensation belt first can be voluntarily shunk during heating to eliminate between interface
Gap, and then air is discharged, and by wrapped mode, since overlap joint interface is more, be conducive to that more air are discharged, and then avoid
Later period cable is punctured due to air remains by electric current；Isolating shrinkable when temperature reaches the fusing point of insulation pyrocondensation belt, after tightening
Band can further filling interface gap, and fuse to form one with interior semiconductive repair layer, insulating layer, and the insulation after melting
Pyrocondensation belt compared to it is wrapped when it is more smooth, be more advantageous to the reparation of subsequent outer semiconducting layer.
The present invention is further arranged to: the armouring repair layer and copper shield repair layer are all made of respective metal silk braid over braid
It is wrapped to form.
By using above-mentioned technical proposal, is brought using corresponding metal wire knitted and repair copper shield and armor, no
Only there is good repairing effect, and the structure of metal wire knitted band is highly convenient for winding.
Another object of the present invention is to provide a kind of mounting process of three-core cable welded joint, comprising the following steps:
Step 1, cable handling: by two sections of cables respectively according to external sheath layer, armor, inner restrictive coating, copper shield, outside partly lead
Electric layer, insulating layer, interior semi-conductive layer are the longitudinal exploitation cable of sequence, and clear by the interior semi-conductive layer clast between conductor copper wire is clipped in
Reason is clean, takes out the filler led between core and external protection group；
Step 2, preset accessory: 1-2 root heat-shrinkable T bush, 2-3 root cold shrink sleeve are inserted in the end of any one section of cable and is slided
To external sheath layer；
Step 3, it connects conductor: being aligned conductor by cable three-phase phase-sequence requirement, by two respective conductors insertion installation sets, pass through
The mode of exothermic weld is integrally formed corresponding two conductors with installation set fusion, by the cooling device being mounted on conductor
So that cable is cooling；
Step 4, be surface-treated: when conductor temperature is cooled to 40-50 DEG C, cut on the outside of installation set extra copper material and by conductor and
Installation set surface polishes smooth, according to the connection and surface treatment for similarly completing other two groups of conductors；
Step 5, interface processing: cone shape is cut into the end after insulating layer is exploited, and conical surface is polished smooth,
It cuts out chamfering and polishes smooth in end after outer semiconducting layer is exploited；
Step 6, washes of absolute alcohol installation set, conductor, interior semi-conductive layer and insulating layer table first semi-conductive layer in restoring: are used
Face, by semiconductive polyethylene tense after out of one wrapped to another interior semi-conductive layer in the outside of semi-conductive layer outside；
Step 7, insulating layer is restored: from the outer of wrapped to another insulating layer in the outside of an insulating layer after insulation pyrocondensation belt is tensed
Band-like electric heater is wrapped up in side on the outside of insulation pyrocondensation belt, so that insulation pyrocondensation belt and semiconductive polyethylene, insulating layer fuse
It is integrated, is polishing to after cooling smooth；
Step 8, restore outer semiconducting layer: with washes of absolute alcohol insulation repair layer surface, by semiconductive self-adhesive tape tense after
On the outside of an outer semiconducting layer on the outside of wrapped to another outer semiconducting layer, semiconductive self-adhesive tape extensibility during wrapped
For 180-220%；
Step 9, copper shield is restored: after proof copper-wire braided mesh belt is tensed, wrapped to another copper shield on the outside of a copper shield
Layer outside, then proof copper-wire braided mesh belt is fixed on the outside of corresponding copper shield by two constant force springs；
Step 10, it restores filler: leading core for three and close up, the filler under exploitation is placed at former filler, or use glue
The bod enters to make at former filler three to lead core as a cylindrical body；
Step 11, inner restrictive coating is restored: from inner restrictive coating outside and wrapped to another inner sheath after water-proof self-adhesion band is tensed
Layer outside, winding layer number are reciprocal two layers；
Step 12, it restores armor: armor being polished bright, after stainless steel wire woven mesh belt is tensed on the outside of an armor
On the outside of wrapped to another armor, then corresponding armour is fixed at the both ends of stainless steel wire woven mesh belt by two constant force springs
It fills on the outside of layer；
Step 13, it restores external sheath layer: two external sheath layer distances and the surface of corresponding armor intersection 90-120mm is beaten
Polish it is whole, in the wrapped 1-2 weeks water-proof seal adhesive tape of the burnishing part of two external sheath layers, the pyrocondensation being inserted on external sheath layer in advance
Casing moves into the central location of connector, and the both ends of heat-shrinkable T bush are overlapped on respectively on corresponding external sheath layer, water-proof seal adhesive tape
It is capped in the both ends of heat-shrinkable T bush, heat-shrinkable T bush is subjected to heat shrink, cold shrink sleeve is moved into heat-shrinkable T bush and outer shield
The lap-joint of jacket layer simultaneously extracts internal plastic support out, so that cold shrink sleeve shrinks and packs tightly in heat-shrinkable T bush and external sheath layer
On.
By using above-mentioned technical proposal, by the way that the both ends of two conductors are inserted in installation set, so that it will not loose, into
And it is aligned and ensure that the bonding strength of pad, for two conducting wires during exothermic weld, metal copper liquid is by two conductors
Again interconnected meanwhile, it is capable to make conductor and installation set solid out of deflector hole flows between installation set and conductor hole
Surely it is connected as one, increases the conductive area of conductor and reduce calorific value, enhance the mechanical strength of two conductor connections.This
Outside, installation set can prevent from damaging conductor when polishing crator.
End after insulating layer is exploited is cut into cone shape and is polished smooth, be more advantageous to eliminate insulation pyrocondensation belt with
Overlap joint gap between insulating layer, the end after outer semiconducting layer is exploited are cut out chamfering and are polished smooth, be more advantageous to and disappear
Except the overlap joint gap between semiconductive self-adhesive tape and outer semiconducting layer.
Dehydrated alcohol mainly plays cleaning action, simultaneously because semiconductive self-adhesive tape be carried out by way of stickup it is wrapped,
By washes of absolute alcohol, it adheres to carrier, is conducive to improve firm pasting degree.In addition, semiconductive self-adhesive tape has good bullet
Property, extensibility is that 180-220% can further effectively improve semiconductive self-adhesive tape on insulation repair layer during wrapped
Firmness.
By restoring filler, enables to three to lead core as a cylindrical body, dispatch workers to do on-site repairs so as to be conducive to eliminate
Coset and the interfacial gap between core is led, and then improves the relative stability for leading core between coset of dispatching workers to do on-site repairs.
Due to for ease of operation, needing first to lead stud for three and open during leading core for reparation three, therefore inciting somebody to action
Three are led after core closes up, and can be generated outside distracted stress, by first back and forth winding water-proof self-adhesion band two layers, be realized pre- solid
It is fixed, then further packed tightly by stainless steel wire braid over braid and lead core to overcome stress.
It can be improved the degree of interference fit between cold shrink sleeve and external sheath layer by water-proof seal adhesive tape, and then improve shrinkage
The leakproofness at casing both ends avoids leak to improve waterproof performance.Meanwhile even certain relaxation occurs for cold shrink sleeve,
Water-proof seal adhesive tape can continue to prevent leak as second defence line.
The present invention is further arranged to: in step 1, external sheath layer strips 400-800mm, and armor exposed length retains
30-60mm, inner restrictive coating exposed length retain 20-50mm, and copper shield exposed length retains 200-600mm, outer semiconducting layer
Exposed length retains 15-30mm, and insulating layer exposed length retains 50-80mm, and it is 5-10mm that interior semi-conductive layer, which retains length,；In step
In rapid 5, cone height is 20-50mm.
It by using above-mentioned technical proposal, reasonably strips length and retains length, can be convenient for welding two conductors
While, it is also convenient for the wrapped of each repair layer.
The present invention is further arranged to: step 7, restoring insulating layer: from the outer of an insulating layer after insulation pyrocondensation belt is tensed
The outside of side wrapped to another insulating layer repeatedly, until its wrapped outer diameter terminate when being greater than outer semiconducting layer 4-5mm it is wrapped；
The elasticity that wrapped one layer of extensibility is 180-220% on the outside of insulation pyrocondensation belt tightens band, and the both ends that elasticity tightens band pass through
High temperature-resistanadhesive adhesive tape is fixed, and is tightened band outside in elasticity and is wrapped up aluminium thermal sheet, wraps up band-like electric heater on the outside of aluminium thermal sheet；
It is tightened in elasticity and is inserted into thermocouple between band and band-like electric heater, and cooling dress is installed at band-like electric heater both ends
It sets；
Setting heating temperature is 145-185 DEG C of heating 60-120min, so that insulation pyrocondensation belt and semiconductive polyethylene, insulation
Layer fusion is integrated, and is removed cooling device, band-like electric heater, thermocouple, aluminium thermal sheet and elasticity after cooling and is tightened
Insulation repair layer is polishing to smooth by band.
By using above-mentioned technical proposal, band is tightened by wrapped on the outside of insulation pyrocondensation belt, stretches 180- tightening band
Air can further be discharged under squeezing action after 220% in insulation pyrocondensation belt melting process to eliminate interfacial gap, and molten
More consolidation after being integrated has stronger structural strength and structural stability.And it is enabled to using band-like electric heater
Insulation pyrocondensation belt thermally equivalent, so that the insulation pyrocondensation belt after melting has more good surface smoothness after the cooling period.
The present invention is further arranged to: semiconductive polyethylene, insulation pyrocondensation belt, semiconductive self-adhesive tape, proof copper-wire braided net
It is wrapped that band, water-proof self-adhesion band, stainless steel wire woven mesh belt are all made of half lap scarf joint formula, i.e., is partially overlapped in during wrapped wrapped
On interface, another part is overlapped on itself.
It is wrapped by this plate bridging type by using above-mentioned technical proposal, there is higher structural stability after wrapped,
To improve the structural strength and stability of cable after reparation.
In conclusion the invention has the following advantages:
1. the elastic contractile force of cold shrink sleeve is big, permanent elasticity cladding is able to carry out to the lap-joint at oversheath repair layer both ends,
To form interference fit for a long time, the relative stability between the both ends and external sheath layer of oversheath repair layer is effectively increased,
And cold shrink sleeve can fit in securely the outside of external sheath layer, and then effectively improve the waterproof performance of cable after repair；
2. insulation pyrocondensation belt first can be voluntarily shunk during heating to eliminate interfacial gap, and then is discharged air, and by around
The mode of packet since overlap joint interface is more is conducive to that more air are discharged, and then avoids later period cable electric because of air residual
Stream breakdown；When temperature reaches the fusing point of insulation pyrocondensation belt, insulation pyrocondensation belt after tightening can further filling interface gap,
And fuse to form one with interior semiconductive repair layer, insulating layer, and the insulation pyrocondensation belt after melting compared to it is wrapped when it is more flat
It is whole, it is more advantageous to the reparation of subsequent outer semiconducting layer；
3. band is tightened by wrapped on the outside of insulation pyrocondensation belt, it can in the case where tightening with the squeezing action after stretching 180-220%
Air is discharged further in insulation pyrocondensation belt melting process to eliminate interfacial gap, and fusion be integrated after more consolidation, tool
There are stronger structural strength and structural stability.And insulation pyrocondensation belt thermally equivalent is enabled to using band-like electric heater, make
Insulation pyrocondensation belt after must melting has more good surface smoothness after the cooling period.
Detailed description of the invention
Fig. 1 is the partial sectional view of embodiment；
Fig. 2 is the structural schematic diagram after the exploitation of embodiment unit cable；
Fig. 3 is a-quadrant enlarged drawing in Fig. 1；
Fig. 4 is B area enlarged drawing in Fig. 1.
Description of symbols: 1, core is led；11, conductor；12, interior semi-conductive layer；13, insulating layer；14, outer semiconducting layer；15,
Copper shield；2, external protection group；21, inner restrictive coating；22, armor；23, external sheath layer；3, interior repair layer group；31, interior half
Conductive repair layer；32, insulate repair layer；33, outer semiconductive repair layer；34, copper shield repair layer；4, it dispatches workers to do on-site repairs coset；41, interior
Sheath repair layer；42, armouring repair layer；43, oversheath repair layer；5, installation set；6, constant force spring；7, cold shrink sleeve.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
It referring to Fig.1, is that (specification is that tri- core of 3kV-35kV is crosslinked poly- second to a kind of three-core cable welded joint disclosed by the invention
Alkene cable), the interior repair layer group 3 including two cables interconnected and for repairing cable and coset 4 of dispatching workers to do on-site repairs.Every
Cable, which includes three, leads core 1 and is coated on three external protection groups 2 for leading 1 outside of core, interior repair layer group 3 and outer repair layer
Group 4, which is respectively used to repair, leads core 1 and external protection group 2.
Referring to Fig. 2, Fig. 3, every lead core 1 from the inside to the outside successively include conductor 11, it is interior semi-conductive layer 12, insulating layer 13, outer
Semi-conductive layer 14 and copper shield 15, interior repair layer group 3 successively include for repairing half in interior semi-conductive layer 12 from the inside to the outside
Conductive repair layer 31, the insulation repair layer 32 for repairing insulating layer 13 are repaired for repairing the outer semiconductive of outer semiconducting layer 14
Cladding 33, the copper shield repair layer 34 for repairing copper shield 15.Wherein, interior semiconductive repair layer 31 is by semiconductive polyethylene
It is formed with wrapped, outer semiconductive repair layer 33 is formed by semiconductive self-adhesive tape is wrapped.
Insulation repair layer 32 is formed using insulation pyrocondensation belt is wrapped, and the insulation repair layer 32 can voluntarily be received by heating
Contracting is to eliminate interfacial gap and and interior semiconductive repair layer 31, the fusion formation one of insulating layer 13.
Wherein, the be connected outer sheath of part of two conductors 11 is equipped with installation set 5, and the side wall of the installation set 5 is through having
Several deflector holes, two conductors 11 are repaired by way of exothermic weld.
Referring to Fig.1, Fig. 4, external protection group 2 successively include inner restrictive coating 21, armor 22, external sheath layer from the inside to the outside
23, coset of dispatching workers to do on-site repairs 4 successively includes for repairing the inner sheath repair layer 41 of inner restrictive coating 21, for repairing armouring from the inside to the outside
Armouring repair layer 42, the oversheath repair layer 43 for repairing external sheath layer 23 of layer 22.Oversheath repair layer 43 is set as heat
Heat-Shrinkable Tubings, overlapped that both ends are arranged with cold shrink sleeve 7 for external sheath layer 23 and oversheath repair layer 43.Oversheath repair layer 43 is set
It is set to heat-shrinkable T bush, overlapped that both ends are arranged with cold shrink sleeve 7 for external sheath layer 23 and oversheath repair layer 43.
Wherein, armouring repair layer 42 and copper shield repair layer 34 are all made of that respective metal silk braid over braid is wrapped to be formed.
The mounting process of the three-core cable welded joint the following steps are included:
Step 1, cable handling: by two sections of cables respectively according to external sheath layer 23, armor 22, inner restrictive coating 21, copper shield
15, outer semiconducting layer 14, insulating layer 13, interior semi-conductive layer 12 are the longitudinal exploitation cable of sequence, and will be clipped between 11 copper wire of conductor
12 clast of interior semi-conductive layer clean out, take out and lead filler between core 1 and external protection group 2；Wherein, external sheath layer 23 is shelled
Except 400-800mm, 22 exposed length of armor retains 30-60mm, and 21 exposed length of inner restrictive coating retains 20-50mm, copper shield
15 exposed length of layer retain 200-600mm, and 14 exposed length of outer semiconducting layer retains 15-30mm, and 13 exposed length of insulating layer is protected
50-80mm is stayed, it is 5-10mm that interior semi-conductive layer 12, which retains length,；
Step 2, preset accessory: 1-2 root heat-shrinkable T bush, 2-3 root cold shrink sleeve 7 are inserted in the end of any one section of cable and is slided
To external sheath layer 23；
Step 3, it connects conductor 11: being aligned conductor 11 by cable three-phase phase-sequence requirement, two respective conductors 11 are inserted into installation set 5
It is interior, it fuses corresponding two conductors 11 with installation set 5 and is integrally formed, by being mounted on conductor 11
On cooling device make cable cooling；
Step 4, be surface-treated: when 11 temperature of conductor is cooled to 40-50 DEG C, the extra copper material in 5 outside of cutting installation set will simultaneously be led
Body 11 and 5 surface of installation set polish smooth, according to the connection and surface treatment for similarly completing other two groups of conductors 11；
Step 5, interface processing: cone shape is cut into the end after insulating layer 13 is exploited, and conical surface is first used 240#
It is polished smooth again with 600# sand paper after sand paper polishing, the end after outer semiconducting layer 14 is exploited cuts out chamfering and with 600# sand
Paper polishes smooth；
Step 6, restore in semi-conductive layer 12: first using washes of absolute alcohol installation set 5, conductor 11, interior semi-conductive layer 12 and absolutely
13 surface of edge layer, by semiconductive polyethylene tense after out of one wrapped to another interior semi-conductive layer 12 in the outside of semi-conductive layer 12
Outside；
Step 7, insulating layer 13 is restored: from wrapped to another insulation repeatedly of the outside of an insulating layer 13 after insulation pyrocondensation belt is tensed
The outside of layer 13 terminates wrapped when until its wrapped outer diameter is greater than 14 4-5mm of outer semiconducting layer；
The elasticity that wrapped one layer of extensibility is 180-220% on the outside of insulation pyrocondensation belt tightens band, and the both ends that elasticity tightens band pass through
High temperature-resistanadhesive adhesive tape is fixed, and is tightened band outside in elasticity and is wrapped up aluminium thermal sheet, band-like electric heating is wrapped up on the outside of aluminium thermal sheet
Device；
It is tightened in elasticity and is inserted into thermocouple between band and band-like electric heater, and cooling dress is installed at band-like electric heater both ends
It sets；
Setting heating temperature is 145-185 DEG C of heating 60-120min, so that insulation pyrocondensation belt and semiconductive polyethylene, insulation
13 fusion of layer is integrated, and removes cooling device, band-like electric heater, thermocouple, aluminium thermal sheet and elasticity contracting after cooling
Insulation repair layer 32 is polishing to smooth by taut band；
Step 8, it restores outer semiconducting layer 14: with the surface of washes of absolute alcohol insulation repair layer 32, semiconductive self-adhesive tape being drawn
Next 14 outside of outer semiconducting layer wrapped to another on the outside of an outer semiconducting layer 14, the semiconductive self-adhesive tape is around packet procedures
Middle extensibility is 180-220%；
Step 9, copper shield 15 is restored: after proof copper-wire braided mesh belt is tensed, from 15 wrapped to another copper in outside of a copper shield
15 outside of shielded layer, then proof copper-wire braided mesh belt is fixed on corresponding 15 outside of copper shield by two constant force springs 6；
Step 10, it restores filler: leading core 1 for three and close up, the filler under exploitation is placed at former filler, or use glue
The bod enters to make at former filler three to lead core 1 as a cylindrical body；
Step 11, inner restrictive coating 21 is restored: on the outside of an inner restrictive coating 21 and wrapped to another interior after water-proof self-adhesion band is tensed
21 outside of restrictive coating, winding layer number are reciprocal two layers；
Step 12, it restores armor 22: armor 22 is polished light, from an armor after stainless steel wire woven mesh belt is tensed
Wrapped to another 22 outside of armor in 22 outsides, then fixed the both ends of stainless steel wire woven mesh belt by two constant force springs 6
In corresponding 22 outside of armor；
Step 13, external sheath layer 23 is restored: two 23 distances of external sheath layer with corresponding 22 intersection 90-120mm's of armor
Surface polishes flat, and in the wrapped 1-2 weeks water-proof seal adhesive tape of the burnishing part of two external sheath layers 23, is inserted in external sheath layer preparatory
Heat-shrinkable T bush on 23 moves into the central location of connector, and the both ends of heat-shrinkable T bush are overlapped on respectively on corresponding external sheath layer 23,
Water-proof seal adhesive tape is capped in the both ends of heat-shrinkable T bush；
It is heated with ethane gas spray gun alignment heat-shrinkable T bush, makes its contraction from heat-shrinkable T bush center to two sides heating, by shrinkage
Casing 7 moves to the lap-joint of heat-shrinkable T bush and external sheath layer 23 and extracts internal plastic support out, so that cold shrink sleeve 7 is shunk
And it packs tightly on heat-shrinkable T bush and external sheath layer 23.
Wherein, semiconductive polyethylene, insulation pyrocondensation belt, semiconductive self-adhesive tape, proof copper-wire braided mesh belt, water-proof self-adhesion band,
It is wrapped that stainless steel wire woven mesh belt is all made of half lap scarf joint formula, i.e., is partially overlapped on wrapped interface during wrapped, another portion
Divide and is overlapped on itself.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to restrict the invention, all in design structure of the invention
Within think of, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of three-core cable welded joint, the interior repair layer group including two cables interconnected and for repairing cable
(3) and coset of dispatching workers to do on-site repairs (4), the every cable include three lead core (1) and be coated on three lead it is outer on the outside of core (1)
Protective layer group (2), the interior repair layer group (3) and coset of dispatching workers to do on-site repairs (4), which are respectively used to repair, leads core (1) and external protection group
(2), it is characterised in that: the external protection group (2) successively include inner restrictive coating (21), armor (22), external sheath layer (23),
The coset of dispatching workers to do on-site repairs (4) successively includes for repairing the inner sheath repair layer (41) of inner restrictive coating (21), for repairing armouring
Armouring repair layer (42), the oversheath repair layer (43) for repairing external sheath layer (23) of layer (22), the oversheath reparation
Layer (43) is set as heat-shrinkable T bush, and overlapped, and both ends are arranged with shrinkage for the external sheath layer (23) and oversheath repair layer (43)
Casing (7).
2. a kind of three-core cable welded joint according to claim 1, it is characterised in that: the core (1) of leading successively includes
Conductor (11), interior semi-conductive layer (12), insulating layer (13), outer semiconducting layer (14) and copper shield (15), two conductors
(11) outer sheath of part of being connected is equipped with installation set (5), and the side wall of the installation set (5) is through there is several deflector holes.
3. a kind of three-core cable welded joint according to claim 2, it is characterised in that: the interior repair layer group (3) according to
It is secondary include interior semiconductive repair layer (31), insulation repair layer (32), outer semiconductive repair layer (33), copper shield repair layer (34),
The interior semiconductive repair layer (31), insulation repair layer (32), outer semiconductive repair layer (33), copper shield repair layer (34) are adopted
It is wrapped up and is repaired with wrapped mode and lead core (1).
4. a kind of three-core cable welded joint according to claim 3, it is characterised in that: the interior semiconductive repair layer
(31) it is formed by semiconductive polyethylene is wrapped, the outer semiconductive repair layer (33) is formed by semiconductive self-adhesive tape is wrapped.
5. a kind of three-core cable welded joint according to claim 4, it is characterised in that: the insulation repair layer (32) is adopted
Formed with insulation pyrocondensation belt is wrapped, the insulation repair layer (32) can by heating voluntarily shrink with eliminate interfacial gap and and
Interior semiconductive repair layer (31), insulating layer (13) fusion form one.
6. a kind of three-core cable welded joint according to claim 2, it is characterised in that: the armouring repair layer (42) and
Copper shield repair layer (34) is all made of that respective metal silk braid over braid is wrapped to be formed.
7. a kind of mounting process of three-core cable welded joint according to claim 1, it is characterised in that: including following step
Suddenly,
Step 1, cable handling: by two sections of cables respectively according to external sheath layer (23), armor (22), inner restrictive coating (21), copper
Shielded layer (15), outer semiconducting layer (14), insulating layer (13), interior semi-conductive layer (12) are the longitudinal exploitation cable of sequence, and will folder
Interior semi-conductive layer (12) clast between conductor (11) copper wire is cleaned out, and filling out between core (1) and external protection group (2) is led in taking-up
Fill object；
Step 2, preset accessory: 1-2 root heat-shrinkable T bush, 2-3 root cold shrink sleeve (7) are inserted in from the end of any one section of cable and is slided
It moves on external sheath layer (23)；
Step 3, conductor (11) are connected: is aligned conductor (11) by cable three-phase phase-sequence requirement, two respective conductors (11) is inserted into
In installation set (5), fuses corresponding two conductors (11) with installation set (5) and be integrally formed, pass through
Crossing the cooling device being mounted on conductor (11) makes cable cooling；
Step 4, be surface-treated: when conductor (11) temperature is cooled to 40-50 DEG C, the extra copper material in cutting installation set (5) outside is simultaneously
Conductor (11) and installation set (5) surface are polished smooth, at the connection and surface for similarly completing other two groups of conductors (11)
Reason；
Step 5, interface processing: cone shape is cut into the end after insulating layer (13) exploitation, and conical surface is polished
It is smooth, chamfering is cut into out in the end after outer semiconducting layer (14) exploitation and is polished smooth；
Step 6, washes of absolute alcohol installation set (5), conductor (11), interior semi-conductive layer first semi-conductive layer (12) in restoring: are used
(12) and insulating layer (13) surface the outside of semi-conductive layer (12) is wrapped to another out of one after, semiconductive polyethylene is tensed
The outside of interior semi-conductive layer (12)；
Step 7, insulating layer (13) are restored: from wrapped to another insulation in outside of an insulating layer (13) after insulation pyrocondensation belt is tensed
The outside of layer (13), wraps up band-like electric heater on the outside of insulation pyrocondensation belt, so that insulation pyrocondensation belt and semiconductive polyethylene,
Insulating layer (13) fusion is integrated, and is polishing to after cooling smooth；
Step 8, restore outer semiconducting layer (14): with washes of absolute alcohol insulation repair layer (32) surface, by semiconductive self-adhesion
After band tension on the outside of an outer semiconducting layer (14) on the outside of wrapped to another outer semiconducting layer (14), the semiconductive self-adhesive tape exists
Extensibility is 180-220% during wrapped；
Step 9, copper shield (15) are restored: wrapped to another from a copper shield (15) outside after proof copper-wire braided mesh belt is tensed
On the outside of one copper shield (15), then proof copper-wire braided mesh belt is fixed on corresponding copper shield by two constant force springs (6)
(15) outside；
Step 10, it restores filler: leading core (1) for three and close up, the filler under exploitation is placed at former filler, or use
Clay, which is filled at former filler, makes three to lead core (1) as a cylindrical body；
Step 11, inner restrictive coating (21) are restored: on the outside of an inner restrictive coating (21) and wrapped to another after water-proof self-adhesion band is tensed
On the outside of one inner restrictive coating (21), winding layer number is reciprocal two layers；
Step 12, armor (22) are restored: armor (22) is polished bright, from an armour after stainless steel wire woven mesh belt is tensed
It fills on the outside of layer (22) on the outside of wrapped to another armor (22), then passes through two constant force springs (6) for stainless steel wire woven mesh belt
Both ends be fixed on the outside of corresponding armor (22)；
Step 13, external sheath layer (23) are restored: two external sheath layer (23) distances and corresponding armor (22) intersection 90-
The surface of 120mm polishes flat, in the wrapped 1-2 weeks water-proof seal adhesive tape of the burnishing part of two external sheath layers (23), preparatory set
Enter the central location that the heat-shrinkable T bush on external sheath layer (23) moves into connector, the both ends of heat-shrinkable T bush are overlapped on corresponding outer respectively
On restrictive coating (23), water-proof seal adhesive tape is capped in the both ends of heat-shrinkable T bush, and heat-shrinkable T bush is carried out heat shrink, will be cold
Heat-Shrinkable Tubings (7) move to the lap-joint of heat-shrinkable T bush and external sheath layer (23) and extract internal plastic support out, so that shrinkage set
Pipe (7) shrinks and packs tightly on heat-shrinkable T bush and external sheath layer (23).
8. a kind of mounting process of three-core cable welded joint according to claim 7, it is characterised in that: in step 1,
External sheath layer (23) strips 400-800mm, and armor (22) exposed length retains 30-60mm, inner restrictive coating (21) exposed length
Retain 20-50mm, copper shield (15) exposed length retains 200-600mm, and outer semiconducting layer (14) exposed length retains 15-
30mm, insulating layer (13) exposed length retain 50-80mm, and it is 5-10mm that interior semi-conductive layer (12), which retains length,；In steps of 5,
Cone height is 20-50mm.
9. a kind of mounting process of three-core cable welded joint according to claim 7, it is characterised in that: step 7, reduction
Insulating layer (13): from the outer of the outside of an insulating layer (13) wrapped to another insulating layer (13) repeatedly after insulation pyrocondensation belt is tensed
Side terminates wrapped when until its wrapped outer diameter is greater than outer semiconducting layer (14) 4-5mm；
The elasticity that wrapped one layer of extensibility is 180-220% on the outside of insulation pyrocondensation belt tightens band, and the both ends that elasticity tightens band pass through
High temperature-resistanadhesive adhesive tape is fixed, and is tightened band outside in elasticity and is wrapped up aluminium thermal sheet, wraps up band-like electric heater on the outside of aluminium thermal sheet；
It is tightened in elasticity and is inserted into thermocouple between band and band-like electric heater, and cooling dress is installed at band-like electric heater both ends
It sets；
Setting heating temperature is 145-185 DEG C of heating 60-120min, so that insulation pyrocondensation belt and semiconductive polyethylene, insulation
Layer (13) fusion is integrated, and removes cooling device, band-like electric heater, thermocouple, aluminium thermal sheet and elasticity after cooling
Band is tightened, insulation repair layer (32) is polishing to smooth.
10. a kind of mounting process of three-core cable welded joint, feature according to claim 7-9 any one exist
In: semiconductive polyethylene, insulation pyrocondensation belt, semiconductive self-adhesive tape, proof copper-wire braided mesh belt, water-proof self-adhesion band, stainless steel wire are compiled
It is wrapped that knitmesh band is all made of half lap scarf joint formula, i.e., be partially overlapped on wrapped interface during wrapped, another part be overlapped in from
With.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011232A (en) * | 2019-03-28 | 2019-07-12 | 北京首都机场动力能源有限公司 | A kind of interconnection method of 10kV three-core cable |
| CN110492397A (en) * | 2019-09-12 | 2019-11-22 | 国网黑龙江省电力有限公司哈尔滨供电公司 | A kind of multi-purpose Quick repairing device and its application method of insulating of electric power |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904140A (en) * | 2012-09-28 | 2013-01-30 | 北京星航机电设备厂 | Cable shielding layer splicing method |
| CN106329268A (en) * | 2016-08-17 | 2017-01-11 | 长园电力技术有限公司 | Wrapping and molding manufacturing method for middle connector of cross-linked polyethylene insulated power cable |
| CN106451256A (en) * | 2016-11-24 | 2017-02-22 | 深圳供电局有限公司 | Improved art with cable joint thermal contraction installation |
| CN108233282A (en) * | 2018-01-17 | 2018-06-29 | 长园电力技术有限公司 | A kind of power cable scene welded-connecting type belting type straight coupling technique |
| CN108292021A (en) * | 2015-06-03 | 2018-07-17 | 康宁光电通信有限责任公司 | With the fiber optic cables for bonding core element |
-
2018
- 2018-09-28 CN CN201811142048.0A patent/CN109286083A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904140A (en) * | 2012-09-28 | 2013-01-30 | 北京星航机电设备厂 | Cable shielding layer splicing method |
| CN108292021A (en) * | 2015-06-03 | 2018-07-17 | 康宁光电通信有限责任公司 | With the fiber optic cables for bonding core element |
| CN106329268A (en) * | 2016-08-17 | 2017-01-11 | 长园电力技术有限公司 | Wrapping and molding manufacturing method for middle connector of cross-linked polyethylene insulated power cable |
| CN106451256A (en) * | 2016-11-24 | 2017-02-22 | 深圳供电局有限公司 | Improved art with cable joint thermal contraction installation |
| CN108233282A (en) * | 2018-01-17 | 2018-06-29 | 长园电力技术有限公司 | A kind of power cable scene welded-connecting type belting type straight coupling technique |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011232A (en) * | 2019-03-28 | 2019-07-12 | 北京首都机场动力能源有限公司 | A kind of interconnection method of 10kV three-core cable |
| WO2020253085A1 (en) * | 2019-06-19 | 2020-12-24 | 东部超导科技（苏州）有限公司 | Connection method for ybco superconducting material-based superconducting cable |
| CN110492397A (en) * | 2019-09-12 | 2019-11-22 | 国网黑龙江省电力有限公司哈尔滨供电公司 | A kind of multi-purpose Quick repairing device and its application method of insulating of electric power |
| CN110943310A (en) * | 2019-12-17 | 2020-03-31 | 北京航星机器制造有限公司 | Connecting terminal connecting structure and processing method thereof |
| CN111326865A (en) * | 2020-03-03 | 2020-06-23 | 中海石油(中国)有限公司 | Connector suitable for oil well is three-phase power round cable in pit |
| CN111326865B (en) * | 2020-03-03 | 2021-08-06 | 中海石油(中国)有限公司 | Connector suitable for oil well is three-phase power round cable in pit |
| CN112421558A (en) * | 2020-12-01 | 2021-02-26 | 深圳供电局有限公司 | Power cable intermediate head protector |
| CN112421558B (en) * | 2020-12-01 | 2022-06-21 | 深圳供电局有限公司 | Power cable intermediate head protector |
| CN114050517A (en) * | 2021-09-24 | 2022-02-15 | 宁波东方电缆股份有限公司 | Manufacturing process of middle wrapping fusion type soft joint of three-core 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 |
| CN113937589B (en) * | 2021-11-05 | 2024-03-19 | 华能安阳能源有限责任公司 | Cable connection construction process |
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