CN107658834A - A kind of combination presetting system transition joint of high-tension cable and its installation method - Google Patents
A kind of combination presetting system transition joint of high-tension cable and its installation method Download PDFInfo
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- CN107658834A CN107658834A CN201710906737.3A CN201710906737A CN107658834A CN 107658834 A CN107658834 A CN 107658834A CN 201710906737 A CN201710906737 A CN 201710906737A CN 107658834 A CN107658834 A CN 107658834A
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- cable
- insulating body
- copper
- transition joint
- stress cone
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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
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
-
- 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
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
- H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
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Abstract
The transition joint of combination presetting system and its installation method the invention discloses a kind of high-tension cable; it is related to the transition joint field of cable; wherein; transition joint includes the interior conductor connector for being provided with step trough; the both ends of conductor connector are provided with stress cone and both outsides are arranged with insulating body simultaneously; the outer wall of insulating body is provided with electro-conductive lacquer layer; semiconductive self-adhesive tape and copper mesh are provided between stress cone and cable insulation; copper protection shell is provided with the outside of insulating body, between copper protection shell both ends and cable covering welding have heat-shrink tube and its own be provided with ground connection termination.It is completely embedded between all parts, avoids discharging, while sandwich construction plays equilibrium and distributes electric field, reduces loss and prevents the effect of shelf depreciation, safe, transition joint integral sealing, the protective capability and adaptability of itself are stronger.Whole transition joint uses split preset structure, and simple in construction, stable performance, install convenient is quick, service life length.
Description
Technical field
The present invention relates to the transition joint field of cable, more specifically, it relates to which a kind of combination of high-tension cable is preset
Formula transition joint and its installation method.
Background technology
Referring to accompanying drawing 4, high-tension cable includes core, insulating barrier, metal screen layer and protective layer, core successively from the inside to the outside
Interior semi-conductive layer can be also provided between insulating barrier, outer semiconducting layer is additionally provided between insulating barrier and metal screen layer.
With the continuous dilatation of urban electricity system, urban planning is also constantly being changed, and many original transmission lines of electricity need
Transform, with the cross-section of cable that newly lays often difference in former transmission line of electricity, therefore need reducing to connect in this case
Head connection.
Most of cable intermediate joint is the transition joint of Integral prefabricated type in the market, among Integral prefabricated type
Joint uses integrated poured shaping, can not ensure the stress cone of both sides and can meet the different cross-sections of cable, in face of new and old circuit
During cross-section of cable difference, it can not use.A kind of unique transition joint that can realize reducing docking of in the market is referring to accompanying drawing
5, adapter body major insulation is epoxy resin, uses pouring forming technology with metal coating casing forming for an entirety, using bullet
Tightly the stress cone with positioning both sides, afterbody are grounded, sealed with strip lap spring cone backing pressure using tail pipe.
Although the structure of the said goods can meet the connection of reducing cable, the structure of the said goods is considerably complicated,
Physical dimension is also larger, and its manufacturing cost or installation cost are all high, simultaneously because it contains spring cone support etc.
Complicated internal structure, makes installation operation step extremely cumbersome, it is desirable to which the installation technical ability higher to operating personnel, installation process are held
Easily there is deviation and then influence the performance of product.This other product uses spring compression structure, during product longtime running, bullet
Spring is constantly in impaction state, and the elastic force of spring easily reduces or failure, has larger security risk after long-term use of.
The content of the invention
For reducing cable transition joint security it is low the problem of, present invention aims at propose a kind of Split assembled
The combination presetting system transition joint of formula, installation high-tension cable simple, safe to use,
The present invention above-mentioned technical purpose technical scheme is that：
A kind of combination presetting system transition joint of high-tension cable, including the conductor for connecting two different-diameter cable cores connect
Device is connect, step trough is offered in the conductor connector, the both ends of the conductor connector are provided with cable insulation outer sheath
Stress cone, the bottom surface of the stress cone are oppositely arranged, and the outside of the conductor connector and the stress cone is arranged with absolutely simultaneously
Edge main body, electro-conductive lacquer layer is provided with the outside of the insulating body, winds and is provided between the stress cone and cable insulation
Semiconductive self-adhesive tape, the semiconductive self-adhesive tape outer sheath are provided with copper mesh, and the insulating body and the copper mesh outer sheath are provided with
Copper protects shell, and the copper protects welding between shell both ends and cable covering to have heat-shrink tube, and the copper protects outer shell outer wall
Both ends be provided with ground connection termination.
Pass through above-mentioned technical proposal, conductor connector play a part of connecting reducing cable core, and stress cone can disperse
Conductor connector end Electric Field Distribution, conductor connector edge electric-field intensity is reduced, insulating body plays safeguard protection effect
While its outer conductive enamelled coating can equilibrium distribute electric field, reduce loss and prevent shelf depreciation, electro-conductive lacquer layer simultaneously also with
The outer semiconducting layer handing-over of cable, forms continuous protective effect.Stress cone and insulating body have high resiliency and deformability,
Reduce the gap of contacting section, heat-shrink tube causes the stitching portion of copper protection shell more to seal simultaneously.Copper protects shell from outside
Protect transition joint overall, adaptability is high.Whole transition joint uses split preset structure, simple in construction, stable performance, installation
It is convenient, service life length.
Further, it is provided with shrinkproof ring in cable core outer sheath between the stress cone and the conductor connector.
Pass through above-mentioned technical proposal, during being rocked in order to avoid cable, the cable insulation at conductor connector and both ends
Between produce gap, electric discharge phenomena occur, preferably shrinkproof ring plays extra sealing function by itself toughness.
Further, the both ends of the insulating body outer wall offer cone tank, and the insulating body is close to the stress
The external diameter for boring one end is equal to the external diameter of stress cone.
Pass through above-mentioned technical proposal, is bonded even closer between insulating body and stress cone, profile is more smooth.
Further, it is filled with sealing lead between the heat-shrink tube and cable covering.
Pass through above-mentioned technical proposal, the presence of sealing lead substantially reduce original gap, and sealing effectiveness is more preferable so that middle
More close in space inside joint.
Further, the copper protection side wall of outer shell offers encapsulating mouth, the copper protection shell and the insulating body
Between be filled with waterproof gasket cement.
Pass through above-mentioned technical proposal, when run into need to be positioned over the cable in water when, pass through filling waterproof gasket cement
The waterproof ability of cable is stronger.
Further, the ground connection termination connects with ground wire, the copper protection shell and the ground wire outer sheath
Provided with outer containment vessel, insulation filling agent is filled between the outer containment vessel and copper protection shell.
Pass through above-mentioned technical proposal, outer containment vessel are made up of fiberglass, and the metallic character of copper protection shell is still present, then
Shell is protected to protect copper by outer containment vessel.
Further, the outer containment vessel includes upper casing and lower casing, and the upper casing on the inside of described lower casing one end away from opening
Provided with the resettlement groove for placing the ground wire.
Pass through above-mentioned technical proposal, connecting line can be stored in resettlement groove, avoid it bad by extruding, particularly in severe ring
In border.
Further, the stress cone and the insulating body use liquid silicon rubber material.
Pass through above-mentioned technical proposal,
A kind of installation method of the combination presetting system transition joint of high-tension cable, comprises the following steps：
Step 1, take two cables, cable socket peeled off according to regulation size, expose successively the core of cable, insulating barrier and
Metal screen layer；
Step 2, the outside prior to a cable insulation are arranged stress cone and insulating body successively, exhausted then at another cable
Stress cone is arranged on the outside of edge layer；
Step 3, the conductor connector both ends coaxially fixed shrinkproof ring of fitting, then by two cable cores according to respective diameter
Insert respectively in the both ends of conductor connector, after good position, bolt is screwed to fracture；
Step 4, insulating body are pushed back on the outside of conductor connector, then push back stress cone until being contacted simultaneously with conductor connector
Abutted with insulating body, insulating body is placed in the middle；
The lap-joint of step 5, cable insulation and stress cone outer wall winds one layer of semiconductive self-adhesive tape, outside semiconductive self-adhesive tape
Portion's half lap scarf joint winds one layer of copper mesh；
Step 6, in the outside of insulating body installation copper protection shell, fixed with self-tapping screw, through encapsulating mouth outside copper is protected
Injection waterproof gasket cement in shell；
Step 7, outer containment vessel is installed in the outside of copper protection shell, arranges ground wire and is positioned in resettlement groove, it is outer in copper protection
The inside injection insulation filling agent of shell.
Pass through above-mentioned technical proposal, stress cone and insulating body have high resiliency and deformability, reduce contacting section
Gap.
Pass through above-mentioned technical proposal, transition joint is simple in construction, middle without additional dedicated instrument, installation in installation process
Joint is simple and quick.
Compared with prior art, beneficial effects of the present invention are as follows：
（1）Material advantage：Stress cone and insulating body use liquid silicon rubber material, and both has high elastic deformation capacity
And it is sufficiently flexible, it can hold tightly and be fitted on cable well, slit discharge occurs in the face of avoiding contact with, and the material has very
Strong hydrophobicity, self-gravitation ability and ozone-resistant and ultraviolet-resistant capacity so that transition joint, which has, is applicable that scene is more, utilization
The wide and safe to use characteristic of scope；
（2）Structural advantage：Transition joint uses separate prefabricated structure, and all parts stable performance, service life length, copper is protected outer
Shell can be with more efficiently transmission short circuit current, and protects cable itself, at the same also prevent outside mechanical damage, in indirectly
Stress Control unit built in head, using geometric method control internal electric field distribution, and using full-shield and the knot of multilayer screen
Structure, make the Electric Field Distribution inside transition joint uniform, it is safer during transition joint use；
（3）Installation advantage：The overall structure of transition joint is simple, and dimensions is smaller, installation process without specific purpose tool, according to
After secondary installation all parts, the protection of shell, outer containment vessel and heat-shrink tube is protected by copper so that transition joint has multiple
Waterproof construction, there is splendid sealing performance, operating environment requirements are low, and applicability is stronger, while install more quick letter
Just, operation is same convenient, is adapted to large-scale promotion.
Brief description of the drawings
Fig. 1 is a kind of structural representation one of the combination presetting system transition joint of high-tension cable；（Without copper protection shell and outside
Containment vessel）
Fig. 2 is a kind of structural representation two of the combination presetting system transition joint of high-tension cable；（Without outer containment vessel）
Fig. 3 is a kind of structural representation three of the combination presetting system transition joint of high-tension cable；
Fig. 4 is the cross section view of high-tension cable；
Fig. 5 is the transition joint schematic diagram of prior art.
Reference：1st, conductor connector；2nd, step trough；3rd, stress cone；4th, insulating body；5th, electro-conductive lacquer layer；6th, partly lead
Electric self-adhesive tape；7th, copper mesh；8th, copper protection shell；9th, heat-shrink tube；10th, it is grounded termination；11st, shrinkproof ring；12nd, cone tank；13rd, seal
Lead；14th, encapsulating mouth；15th, waterproof gasket cement；16th, it is grounded；17th, outer containment vessel；171st, upper casing；172nd, lower casing；18th, insulation is filled out
Fill agent；19th, resettlement groove；20th, core；21st, insulating barrier；22nd, metal screen layer；23rd, protective layer；24th, interior semi-conductive layer；25th, it is outer
Semi-conductive layer.
Embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, with reference to embodiment and accompanying drawing pair
The present invention is described in further detail, but embodiments of the present invention are not limited only to this.
The combination presetting system transition joint of a kind of high-tension cable, as shown in figure 1, including for connecting two different-diameter electricity
The conductor connector 1 of cable core, conductor connector 1 are copper gold utensil, and the both ends of the length direction of conductor connector 1 have opening to connect
Step trough 2 is offered in place, the both ends of conductor connector 1 are embedded with the bolt for compression simultaneously.The company of playing of conductor connector 1
The effect of reducing cable core is connect, after conductor connector 1 is installed in place, bolt need to be screwed to fracture.
The both ends of conductor connector 1 are provided with stress cone 3 in cable insulation outer sheath, the side section of stress cone 3 it is tapered and
Floor space is more than top area, and the bottom surface of two stress cones 3 is oppositely arranged.Stress cone 3 can disperse the end electric field of conductor connector 1
Distribution, reduce the edge electric-field intensity of conductor connector 1.During being rocked in order to avoid cable, conductor connector 1 and both ends
Gap is produced between cable insulation, electric discharge phenomena occur, in cable core outer sheath between stress cone 3 and conductor connector 1
Provided with shrinkproof ring 11.By itself toughness, preferably shrinkproof ring 11 plays extra sealing function.
The outside of conductor connector 1 and stress cone 3 is arranged with insulating body 4 simultaneously.Stress cone 3 and insulating body 4 use
The liquid silicon rubber material of excellent performance, stress cone 3 and insulating body 4 have high resiliency and deformability, reduce contacting section
Gap.The both ends of the outer wall of insulating body 4 offer cone tank 12, and the external diameter at the both ends of insulating body 4 is equal to the outer of stress cone 3
Footpath, it is smooth that close and profile is bonded between stress cone 3 and insulating body 4.The outer wall of insulating body 4 is also painted with electro-conductive lacquer layer 5.
While insulating body 4 plays safeguard protection effect its outer conductive enamelled coating 5 can equilibrium distribute electric field, reduce loss and prevent
Shelf depreciation, outer semiconducting layer of the electro-conductive lacquer layer 5 simultaneously also with cable joins, so as to be internally formed continuous protection in cable
Face.
Winding is provided with semiconductive self-adhesive tape 6 between stress cone 3 and cable insulation, and semiconductive self-adhesive tape 6 is by stress cone 3
Gap between cable insulation covers, and the outside of semiconductive self-adhesive tape 6 is wound with copper mesh 7.Semiconductive self-adhesive tape 6 and copper mesh
7 contact with outer semiconducting layer, play a part of balanced electric field together with outer semiconducting layer, reduce loss and prevent cable from locally putting
Electricity.
As shown in Fig. 2 insulating body 4 and the outside of copper mesh 7, which are arranged, is provided with copper protection shell 8, copper protects shell 8 to pass through certainly
Tapping is fixed, between the copper protection both ends of shell 8 and cable covering welding have a heat-shrink tube 9, heat-shrink tube 9 and cable covering it
Between be filled with sealing lead 13.It will be attached admittedly between the both ends of copper protection shell 8 and the protective layer of cable by burning the lead melted
Fixed and sealing, the presence of sealing lead 13 substantially reduce original gap, and sealing effectiveness is more preferable so that the space inside transition joint
More close.
The copper protection side wall of shell 8 offers multiple encapsulating mouths 14, and encapsulating mouth 14 is preferably two, copper protection shell 8 and absolutely
Waterproof gasket cement 15 is filled between edge main body 4.Setter is through encapsulating mouth 14 in injection waterproof gasket cement in copper protection shell 8
15, when run into need to be positioned over the cable in water when, the waterproof ability by the filling cable of waterproof gasket cement 15 is stronger.
As shown in Figures 2 and 3, the both ends of the copper protection outer wall of shell 8 are installed with multiple ground connection terminations 10, earth terminal
First 10 be preferably two, and ground connection termination 10 is connected with ground wire 16.Copper protects shell 8 and the outside of ground wire 16 to be also arranged simultaneously
Outer containment vessel 17 is installed, outer containment vessel 17 includes upper casing 171 and lower casing 172, inner side of the upper casing 171 away from the one end of lower casing 172
The resettlement groove 19 for placing ground wire 16 is offered along its trend.Connecting line can be stored in resettlement groove 19, avoid its compression
It is crowded bad, particularly in adverse circumstances.Insulation filling agent 18 is filled between outer containment vessel 17 and copper protection shell 8.Outer protection
Shell 17 is made up of fiberglass, and the metallic character of copper protection shell 8 is still present, then protects shell 8 to copper by outer containment vessel 17
Protected.
A kind of installation method of the combination presetting system transition joint of high-tension cable, comprises the following steps：
Step 1, take two cables, cable socket peeled off according to regulation size, expose successively the core of cable, insulating barrier and
Metal screen layer；
Step 2, the outside prior to a cable insulation are arranged stress cone 3 and insulating body 4 successively, then at another cable
Stress cone 3 is arranged on the outside of insulating barrier；
Step 3, the both ends of the conductor connector 1 coaxially fixed shrinkproof ring 11 of fitting, then by two cable cores according to respective straight
Footpath is inserted in the both ends of conductor connector 1 respectively, and after good position, bolt is screwed into fracture；
Step 4, insulating body 4 are pushed back up to the outside of conductor connector 1, then push back stress cone 3 until being connect with conductor connector 1
Touch and abutted with insulating body 4, insulating body 4 is placed in the middle；
The lap-joint of step 5, cable insulation and the outer wall of stress cone 3 winds one layer of semiconductive self-adhesive tape 6, semiconductive self-adhesive tape 6
Outside half lap scarf joint winds one layer of copper mesh 7；
Step 6, in the outside of insulating body 4 installation copper protection shell 8, fixed with self-tapping screw, protected through encapsulating mouth 14 in copper
Protect injection waterproof gasket cement 15 in shell 8；
Step 7, outer containment vessel 17 is installed in the outside of copper protection shell 8, arranges ground wire 16 and is positioned in resettlement groove 19, in
The inside injection insulation filling agent 18 of copper protection shell 8.
Beneficial effects of the present invention are as follows：
Stress cone 3 and insulating body 4 use liquid silicon rubber material, and stress cone 3 and insulating body 4 will have high resiliency deformation
Ability and sufficiently flexible, can hold tightly and be fitted on cable well；In cable work, stress cone 3 and insulating body 4
It is highly stable, be not in contact interface slit discharge；Stress cone 3 and insulating body 4 have very strong hydrophobicity so that middle
Joint is in wet environment and does not also interfere with properties of product；Stress cone 3 and the material low smoke and zero halogen of insulating body 4, have self-gravitation
Ability, does not prolong combustion, reduces spot fire occurrence risk, while ozone-resistant and UV resistant performance are excellent, adapt to High aititude with
High ultraviolet radiation region.
The transition joint of the present invention uses separate prefabricated structure, easily production and preparation, while stable performance, service life
It is long；Conductor connector 1 can effectively realize the docking of the reducing cable of different size, and then realize the transformation of new and old circuit；
The outside of conductor connector 1 is provided with copper protection shell 8, can be with more efficiently transmission short circuit current, and protects cable certainly
Body, while also prevent the mechanical damage of outside.Stress Control unit built in transition joint, using geometric method control internal electric field point
Cloth, and using full-shield and the structure of multilayer screen, make the Electric Field Distribution inside transition joint uniform；It is outer by copper protection
The protection of shell 8, outer containment vessel 17 and heat-shrink tube 9 so that transition joint has multiple waterproof structure, has splendid anti-watertight
Sealing property, it can be immersed directly in water and run, operating environment requirements are low, and applicability is stronger；The overall structure letter of transition joint
Single, dimensions is smaller, and for installation process without specific purpose tool, installation is more fast and convenient, easy to operate, is adapted to push away on a large scale
Extensively.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. the combination presetting system transition joint of a kind of high-tension cable, it is characterised in that including for connecting two different-diameter electricity
The conductor connector of cable core（1）, the conductor connector（1）Inside offer step trough（2）, the conductor connector（1）'s
Both ends are provided with stress cone in cable insulation outer sheath（3）, the stress cone（3）Bottom surface be oppositely arranged, conductor connection
Device（1）With the stress cone（3）Outside simultaneously be arranged with insulating body（4）, the insulating body（4）Outside be provided with and lead
Electric enamelled coating（5）, the stress cone（3）Winding is provided with semiconductive self-adhesive tape between cable insulation（6）, the semiconductive is certainly
Adhesive tape（6）Outer sheath is provided with copper mesh（7）, the insulating body（4）With the copper mesh（7）Outer sheath is provided with copper protection shell（8）,
The copper protects shell（8）Welding has heat-shrink tube between both ends and cable covering（9）, the copper protection shell（8）Outer wall
Both ends are provided with ground connection termination（10）.
2. the combination presetting system transition joint of high-tension cable according to claim 1, it is characterised in that the stress cone
（3）With the conductor connector（1）Between in cable core outer sheath be provided with shrinkproof ring（11）.
3. the combination presetting system transition joint of high-tension cable according to claim 2, it is characterised in that the insulating body
（4）The both ends of outer wall offer cone tank（12）, the insulating body（4）Close to the stress cone（3）The external diameter of one end is equal to
Stress cone（3）External diameter.
4. the combination presetting system transition joint of high-tension cable according to claim 3, it is characterised in that the heat-shrink tube
（9）Sealing lead is filled between cable covering（13）.
5. the combination presetting system transition joint of high-tension cable according to claim 4, it is characterised in that the copper protection is outer
Shell（8）Side wall offers encapsulating mouth（14）, the copper protection shell（8）With the insulating body（4）Between be filled with anti-watertight
Sealing（15）.
6. the combination presetting system transition joint of high-tension cable according to claim 1, it is characterised in that the ground connection termination
（10）With ground wire（16）Connection, the copper protect shell（8）With the ground wire（16）Outer sheath is provided with outer containment vessel
（17）, the outer containment vessel（17）Shell is protected with the copper（8）Between be filled with insulation filling agent（18）.
7. the combination presetting system transition joint of high-tension cable according to claim 6, it is characterised in that the outer containment vessel
（17）Including upper casing（171）And lower casing（172）, the upper casing（171）Away from the lower casing（172）Use is offered on the inside of one end
In the placement ground wire（16）Resettlement groove（19）.
8. the combination presetting system transition joint of the high-tension cable according to any one in claim 1-7, it is characterised in that
The stress cone（3）With the insulating body（4）Use liquid silicon rubber material.
9. the installation method of the combination presetting system transition joint of a kind of high-tension cable, it is characterised in that comprise the following steps：
Step 1, take two cables, cable socket peeled off according to regulation size, expose successively the core of cable, insulating barrier and
Metal screen layer；
Step 2, the outside prior to a cable insulation are arranged stress cone successively（3）And insulating body（4）, then at another
Stress cone is arranged on the outside of cable insulation（3）；
Step 3, conductor connector（1）Coaxially shrinkproof ring is fixed in fitting at both ends（11）, then by two cable cores according to each
Diameter insert conductor connector respectively（1）Both ends in, after good position, bolt is screwed to fracture；
Step 4, insulating body（4）Push back until conductor connector（1）Outside, then push back stress cone（3）Until being connected with conductor
Device（1）Contact and and insulating body（4）Abut, insulating body（4）Between two parties；
Step 5, cable insulation and stress cone（3）The lap-joint of outer wall winds one layer of semiconductive self-adhesive tape（6）, semiconductive is certainly
Adhesive tape（6）Outside half lap scarf joint winds one layer of copper mesh（7）；
Step 6, in insulating body（4）Outside installation copper protection shell（8）, fixed with self-tapping screw, through encapsulating mouth（14）
Shell is protected in copper（8）Interior injection waterproof gasket cement（15）；
Step 7, shell is protected in copper（8）Outside outer containment vessel is installed（17）, arrange ground wire（16）It is positioned over resettlement groove
（19）It is interior, protect shell in copper（8）Inside injection insulation filling agent（18）.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710906737.3A CN107658834A (en) | 2017-09-29 | 2017-09-29 | A kind of combination presetting system transition joint of high-tension cable and its installation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710906737.3A CN107658834A (en) | 2017-09-29 | 2017-09-29 | A kind of combination presetting system transition joint of high-tension cable and its installation method |
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| CN107658834A true CN107658834A (en) | 2018-02-02 |
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Application publication date: 20180202 |