CN103986098B - The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device - Google Patents
The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device Download PDFInfo
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- CN103986098B CN103986098B CN201410209782.XA CN201410209782A CN103986098B CN 103986098 B CN103986098 B CN 103986098B CN 201410209782 A CN201410209782 A CN 201410209782A CN 103986098 B CN103986098 B CN 103986098B
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Abstract
The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device, relates to the manufacture method of a kind of medium-pressure power cable transition joint longitudinal water-blocking device.Solve the problem that existing medium-pressure power cable transition joint does not the most possess longitudinal water-blocking ability.The cable of joint is first carried out stripping by the present invention, copper mesh grid is used to recover joint cable of copper shield, copper braid over braid is used to recover joint Steel armor of cable, use butt tube to realize conductor to connect, the connection using the interior outer half of stress cone recovery to lead and to insulate uses the first waterproof jacket simultaneously, second waterproof jacket and tri-finger stall realize the longitudinal water-blocking of three layers, and equal airtight connection copper mesh extra play and armouring extra play are set in the outside of copper braid over braid between waterproof layer, copper shield and the armor of cable are recovered, effectively solve the problem that existing medium-pressure power cable transition joint does not the most possess longitudinal water-blocking ability.The present invention is applicable to medium-pressure power cable transition joint.
Description
Technical field
The present invention relates to the manufacture method of a kind of medium-pressure power cable transition joint longitudinal water-blocking device.
Background technology
10kV and 20kV medium-pressure power cable transition joint the most both at home and abroad does not the most possess longitudinal water-blocking ability, in production practices
The power cable that there is substantial amounts of directly buried installation is intake because its oversheath has the reason such as bad point or breakage to cause in cable body, enters
Enter the moisture in cable body penetrate into along cable body or inflow cable intermediate joint causes cable intermediate joint insulating properties
The gradual joint faults such as energy reduces, water tree is aging, shelf depreciation is serious, discharge in insulation punctures, cause power failure accident
Generation, strong influence power supply quality and power supply reliability.In the 10kV cable that Harbin electric company occurs in recent years
Between in joint fault, the fault caused of longitudinally intaking because of cable intermediate joint accounts for about 50%, especially in rainy season cable indirectly
The fault rate of head longitudinally water inlet is higher, the problem being therefore badly in need of solving cable intermediate joint longitudinally water inlet.
Summary of the invention
The present invention is to solve the problem that existing medium-pressure power cable transition joint does not the most possess longitudinal water-blocking ability, it is proposed that
A kind of manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device.
The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device of the present invention, concretely comprising the following steps of the method:
Step one, the joint of two cables is successively cut by order from outside to inside；
Step 2, two constant force springs are socketed in respectively the outside of two armature of cable layers, by the one of two copper braid over braids
End is crimped in two constant force springs respectively, and the other end of two copper braid over braids connects by pressure welding case is fixing；
Step 3, sheath, armor and the constant force spring of two cables are sealed by two the first waterproof jackets respectively；
Step 4, two the second waterproof jackets are respectively fitted over the outside of two the first waterproof jackets；
Step 5, two tri-finger stalls are respectively fitted on the three-phase conducting wire core of two cables, and one end of two tri-finger stalls is divided
Not with two the second waterproof jacket airtight connections, two tri-finger stall other ends respectively with three of the three-phase conducting wire core of two cables
Copper shield seals；
Step 6, the three-phase core of cable is attached, particularly as follows:
Three butt tubes are used to be socketed in the outside of three-phase conducting wire core joint of two cables respectively；
Three stress cones are used to be socketed in the outside of three semi-conductive layer joints of two cables respectively；
Three pieces of copper mesh grids are used to be socketed in the outside of three copper shield joints of two medium-pressure power cables respectively；
Step 7, the 3rd waterproof layer is coated on the outside of three pieces of copper mesh grids, and by three pieces of copper mesh grids claddings be one whole
Body；
Step 8, copper mesh is coated on two the first waterproof jackets and the outside of two copper braid over braids, constitutes copper mesh layers and recover cable
The copper shield of joint；
Step 9, armoring tape is coated on the outside of copper mesh layers, recovers the armor at cable connector；Complete medium voltage electricity electricity
The making of cable transition joint longitudinal water-blocking device.
The cable of joint is first carried out stripping by the present invention, as it is shown in figure 1, the present invention uses copper mesh grid to recover joint electricity
Cable copper shield, uses copper braid over braid to recover joint Steel armor of cable, uses butt tube to realize conductor and connects, uses stress cone to recover
The longitudinal water-blocking that interior outer half is led and the connection insulated uses the first waterproof jacket, the second waterproof jacket and tri-finger stall to realize three layers simultaneously, and
Equal airtight connection between waterproof layer, it is to avoid moisture content reverse osmosis problem, and arrange in the outside of copper braid over braid copper mesh extra play and
Armouring extra play, has recovered copper shield and the armor of cable, effectively solves existing medium-pressure power cable transition joint equal
The problem not possessing longitudinal water-blocking ability, is effectively improved longitudinal waterproof ability of medium-pressure power cable transition joint, and with
Existing medium-pressure power cable intermediate joint device is compared, and longitudinal waterproof ability improves 20% on year-on-year basis.
Accompanying drawing explanation
Fig. 1 is the cable stripping schematic diagram of joint；
Fig. 2 is the structural representation of medium-pressure power cable transition joint longitudinal water-blocking device of the present invention；
Fig. 3 is the installation site schematic diagram of the copper braid over braid 8 described in detailed description of the invention one and constant force spring 9；
Fig. 4 is the installation site schematic diagram of the first waterproof jacket 10 described in detailed description of the invention one；
Fig. 5 is the installation site schematic diagram of the second waterproof jacket 11 described in detailed description of the invention one；
Fig. 6 is the installation site schematic diagram of the fingerstall 12 described in detailed description of the invention one；
Fig. 7 is the installation site schematic diagram of the adapter 13 described in detailed description of the invention one.
Detailed description of the invention
Detailed description of the invention one, combine Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7 present embodiment be described,
The manufacture method of present embodiment medium pressure intermediate joint of electric cable longitudinal water-blocking device, concretely comprising the following steps of the method:
Step one, the joint of two cables is successively cut by order from outside to inside；
Step 2, two constant force springs 9 are socketed in respectively the outside of two armature of cable layers 6, by two copper braid over braids
One end of 8 is crimped in two constant force springs 9 respectively, and the other end of two copper braid over braids 8 connects by pressure welding case 17 is fixing；
Step 3, the sheath 5 of two cables, armor 6 and constant force spring 9 are carried out close by two the first waterproof jackets 10 respectively
Envelope；
Step 4, two the second waterproof jackets 11 are respectively fitted over the outside of two the first waterproof jackets 10；
Step 5, two tri-finger stalls 12 are respectively fitted on the three-phase conducting wire core 1 of two cables, and the one of two tri-finger stalls
End respectively with two the second waterproof jacket 11 airtight connections, two tri-finger stall other ends respectively with the three-phase conducting wire core of two cables
Three copper shields 4 of 1 seal；
Step 6, the three-phase core of cable is attached, particularly as follows:
Three butt tubes 13 are used to be socketed in the outside of three-phase conducting wire core 1 joint of two cables respectively；
Three stress cones 14 are used to be socketed in the outside of three semi-conductive layer 3 joints of two cables respectively；
Three pieces of copper mesh grids 15 are used to be socketed in the outside of three copper shield 4 joints of two medium-pressure power cables respectively；
Step 7, the 3rd waterproof layer 16 is coated on the outside of three pieces of copper mesh grids 15, and three pieces of copper mesh grids 15 are coated with are
One entirety；
Step 8, copper mesh is coated on two first waterproof jackets 10 and the outsides of two copper braid over braids 8, constitutes copper mesh layers 18
Recover the copper shield at cable connector；
Step 9, armoring tape 19 is coated on the outside of copper mesh layers 18, recovers the armor at cable connector；Complete middle pressure
The making of intermediate joint of electric cable longitudinal water-blocking device.
Detailed description of the invention two, present embodiment are to the medium-pressure power cable transition joint described in detailed description of the invention one longitudinally
Further illustrating of the manufacture method of waterproofing device, the cable described in step one includes that 1, three masters of three-phase conducting wire core are exhausted
Edge layer 3, three copper shields 4 of 2, three semi-conductive layers, sheath 5, armor 6 and oversheath 7；Three major insulations
Layer 2 is the most coaxially coated on the outside of three-phase conducting wire core 1；Three semi-conductive layers 3 are the most coaxially coated on three major insulations
The outside of layer 2；Three copper shields 4 are the most coaxially coated on the outside of three semi-conductive layers 3；Sheath 5 is coated on three
The outside of individual copper shield 4；Armor 6 is coated on the outside of sheath 5.
Detailed description of the invention three, present embodiment are to the medium-pressure power cable transition joint described in detailed description of the invention one longitudinally
Further illustrating of the manufacture method of waterproofing device, first waterproof jacket the 10, second waterproof jacket 11 and fingerstall 12 all use anti-
Glue band solderless wrapped connection realizes.
By the cable two ends of preparation making cable intermediate joint respectively as demand size stripping (shown in Fig. 1), by copper braid over braid
Tighten with armor constant force spring or copper wire, at oversheath and armor breakpoint centered by by oversheath, armor, interior
Sheath adhesive waterproof tape intersects walks around the space between threephase cable repeatedly, constitutes the first waterproof jacket (the first longitudinal water-blocking layer),
Then longitudinally passing through threephase cable with waterproof second waterproof jacket of shrinkage (the second longitudinal water-blocking layer), set wraps in the first waterproof jacket
Outside, the copper shield lap-joint of the second waterproof jacket Yu threephase cable is wound around multilamellar parcel tight fingerstall repeatedly, and (the 3rd longitudinally
Water blocking layer), the crimping completing two ends triple line core conductor the most again recovers conductor connection, the stress cone of set shrinkage recovers inside and outside
Connection, the set copper mesh grid partly led and insulate recover the connection of copper shield, will recover the threephase cable marine glue of copper shield
Band is tightly wound around multilamellar and covers second waterproof, is then crimped by copper braid over braid pressing tongs in both sides, by copper braid over braid and cable body
It is wound around parcel three layers with adhesive waterproof tape to cover to each 80mm in copper braid over braid both sides, is finally wound around parcel three layers with armoring tape
All covering adhesive waterproof tape, longitudinal water-blocking cable transition joint makes complete.
Claims (3)
1. the manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device, it is characterised in that the concrete steps of the method
For:
Step one, the joint of two cables is successively cut by order from outside to inside；
Step 2, two constant force springs (9) are socketed in respectively the outside of two armature of cable layers (6), by two copper
One end of braid over braid (8) is crimped in two constant force springs (9) respectively, and the other end of two copper braid over braids (8) is by pressure
Female connector (17) is fixing to be connected；
Step 3, by two the first waterproof jackets (10) respectively by the sheath (5) of two cables, armor (6) and constant force
Spring (9) seals；
Step 4, two the second waterproof jackets (11) are respectively fitted over the outside of two the first waterproof jackets (10)；
Step 5, two tri-finger stalls (12) are respectively fitted on the three-phase conducting wire core (1) of two cables, and two three fingers
One end of set respectively with two the second waterproof jacket (11) airtight connections, two tri-finger stall other ends respectively with the three of two cables
Three copper shields (4) of phase conductor core (1) seal；
Step 6, the three-phase core of cable is attached, particularly as follows:
Three butt tubes (13) are used to be socketed in the outside of three-phase conducting wire core (1) joint of two cables respectively；
Three stress cones (14) are used to be socketed in the outside of three semi-conductive layer (3) joints of two cables respectively；
Three pieces of copper mesh grids (15) are used to be socketed in three copper shield (4) joints of two medium-pressure power cables respectively
Outside；
Step 7, the 3rd waterproof layer (16) is coated on the outside of three pieces of copper mesh grids (15), and by three pieces of copper mesh grids
(15) cladding is an entirety；
Step 8, copper mesh is coated on two the first waterproof jackets (10) and the outside of two copper braid over braids (8), constitutes copper mesh
Layer (18) recovers the copper shield at cable connector；
Step 9, armoring tape (19) is coated on the outside of copper mesh layers (18), recovers the armor at cable connector；Complete
Become the making of medium-pressure power cable transition joint longitudinal water-blocking device.
The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device the most according to claim 1, its feature exists
In, the cable described in step one include three-phase conducting wire core (1), three main insulating layers (2), three semi-conductive layers (3),
Three copper shields (4), sheath (5), armor (6) and oversheath (7)；Three main insulating layers (2) are same respectively
Axle is coated on the outside of three-phase conducting wire core (1)；Three semi-conductive layers (3) are the most coaxially coated on three main insulating layers (2)
Outside；Three copper shields (4) are the most coaxially coated on the outside of three semi-conductive layers (3)；Sheath (5) is coated with
Outside three copper shields (4)；Armor (6) is coated on the outside of sheath (5).
The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device the most according to claim 1, its feature exists
In, the first waterproof jacket (10), the second waterproof jacket (11) and fingerstall (12) all use adhesive waterproof tape solderless wrapped connection to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209782.XA CN103986098B (en) | 2014-05-16 | 2014-05-16 | The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209782.XA CN103986098B (en) | 2014-05-16 | 2014-05-16 | The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device |
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| CN103986098A CN103986098A (en) | 2014-08-13 |
| CN103986098B true CN103986098B (en) | 2016-09-21 |
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| CN201410209782.XA Expired - Fee Related CN103986098B (en) | 2014-05-16 | 2014-05-16 | The manufacture method of medium-pressure power cable transition joint longitudinal water-blocking device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879581A (en) * | 2018-06-27 | 2018-11-23 | 中国石油天然气股份有限公司 | Cable connection device and cable connection method |
| 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 |
| CN115149469B (en) * | 2022-06-29 | 2023-07-25 | 宁波东方电缆股份有限公司 | Manufacturing process of ultrahigh-voltage direct-current 525kV lapped fusion type soft joint |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431189A (en) * | 2008-12-17 | 2009-05-13 | 咸阳彩虹热电有限公司 | Butt joint technique for 10KV oil-paper insulated cable and cross-linked polyethylene insulated cable |
| CN101465527A (en) * | 2008-12-12 | 2009-06-24 | 河南省电力公司信阳供电公司 | Method for first-aid repair of cable middle joint ground fault winding package |
| CN102570374A (en) * | 2012-03-27 | 2012-07-11 | 齐齐哈尔电业局 | Connecting method of lengthened 10kV thermal shrinkable three-core cross-linked polyethylene cable intermediate joint |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10191543A (en) * | 1996-12-25 | 1998-07-21 | Fujikura Ltd | Connection portion for power cable |
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2014
- 2014-05-16 CN CN201410209782.XA patent/CN103986098B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101465527A (en) * | 2008-12-12 | 2009-06-24 | 河南省电力公司信阳供电公司 | Method for first-aid repair of cable middle joint ground fault winding package |
| CN101431189A (en) * | 2008-12-17 | 2009-05-13 | 咸阳彩虹热电有限公司 | Butt joint technique for 10KV oil-paper insulated cable and cross-linked polyethylene insulated cable |
| CN102570374A (en) * | 2012-03-27 | 2012-07-11 | 齐齐哈尔电业局 | Connecting method of lengthened 10kV thermal shrinkable three-core cross-linked polyethylene cable intermediate joint |
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