CN106505509A - A kind of 500kV cable systems transition joint mounting process - Google Patents
A kind of 500kV cable systems transition joint mounting process Download PDFInfo
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- CN106505509A CN106505509A CN201610993023.6A CN201610993023A CN106505509A CN 106505509 A CN106505509 A CN 106505509A CN 201610993023 A CN201610993023 A CN 201610993023A CN 106505509 A CN106505509 A CN 106505509A
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- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000008569 process Effects 0.000 title claims abstract description 54
- 230000007704 transition Effects 0.000 title claims abstract description 35
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 claims abstract description 58
- 239000010949 copper Substances 0.000 claims abstract description 58
- 238000009413 insulation Methods 0.000 claims abstract description 39
- 238000009434 installation Methods 0.000 claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 28
- 230000000903 blocking effect Effects 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000005498 polishing Methods 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 13
- 239000003755 preservative agent Substances 0.000 claims description 11
- 230000002335 preservative effect Effects 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 9
- 239000000565 sealant Substances 0.000 claims description 9
- 229920002545 silicone oil Polymers 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 6
- 238000003032 molecular docking Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 4
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- 244000137852 Petrea volubilis Species 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 206010053615 Thermal burn Diseases 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 3
- 230000004313 glare Effects 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 claims 1
- 238000005253 cladding Methods 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
-
- 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
-
- 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
-
- 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
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- Cable Accessories (AREA)
Abstract
The present invention relates to extra-high-tension cable systems technology field, discloses a kind of 500kV cable systems transition joint mounting process, including：1) construction condition confirms；2) prepare before installing；3) transition joint major insulation stress cone is installed；4) process of cable and joint external screen；5) installation of copper shell；6) grounding.The present invention proposes a whole set of 500kV cable system transition joint mounting process, and the effective specification installation procedure of joint, it is to avoid randomness that joint is installed, so that ensure stability and the safety of cable system.
Description
Technical field
A kind of the present invention relates to extra-high-tension cable systems technology field, more particularly to 500kV cable systems transition joint peace
Dress technique.
Background technology
With the continuous dilatation of China's super-large city, transmission distance and power consumption are constantly increasing, existing 220kV cities
Power transmission network increasingly can not meet the power reguirements of super-large city, therefore, using limited space, using jumbo
500kV electric power transmissions cable system enters big city, has become inevitable development trend.In recent years, although China is high in 500kV
Achieve not little progress in terms of voltage cable and adnexa production, the product performance index that produces can meet national standard and
IEC standard, yet with the immature, unstable and lack of standardization of attachment tab process, also gap compared with foreign countries,
So that China 500kV power cable systems still rely on external producer.
The Chinese patent of Application No. CN200910060410.4 is disclosed in a kind of high voltage power cable rubber-like indirectly
Head installation method and device, certain depth in cable major insulation is inserted in transition joint, in transition joint inner chamber and cable major insulation
Surface is passed through gases at high pressure, move to precalculated position stop inflation, transition joint before cable is inserted in, initially with Hough set
The method of transition joint is inserted in, two pairs of Hough sets is inserted in the inner chamber of transition joint two ends respectively, then two ends is carried Hough set
Transition joint be inserted in cable major insulation by gases at high pressure, one end Hough set being wherein first inserted in is with sealing ring and filling
Pore, after two sections of cable connections are finished, restart to inflate, and the dynamic transition joint of reverse push, move to specified location and stop
Only inflate, the tool device such as two pairs of Hough sets of unloading, transition joint is that elasticity is held tightly in cable main.Using foregoing invention,
Transition joint installation effectiveness is substantially increased, and operation is simple and reliable, be particularly well-suited to the installation of 110kV power cables.
But foregoing invention just in the cable of 110kV, therefore need badly a kind of specification ground, safely, stably and
It is directed to the installation method of the cable system transition joint of 500kV.
Content of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of 500kV cable systems transition joint mounting process.This
Flow process and points for attention in invention specification transition joint installation process, random when effectively avoiding transition joint from installing
Property, so as to improve 500kV cable systems safety and stability.
The present invention concrete technical scheme be：
A kind of 500kV cable systems transition joint mounting process, comprises the following steps：
1) construction condition confirms：
1.1) product standard and type is checked；
1.2) confirm that installation outfit is complete；
1.3) in-site installation purifies paulin and mobile air conditioner, it is ensured that, at 0-35 DEG C, air is relative for the temperature control of erecting bed
Humidity≤70%；
2) prepare before installing：
2.1) cable two ends are in place, heat alignment pretreatment, remove mechanical stress；
2.1.1) two end cables to be installed are put, and long end, the short end direction of cable is determined according to field requirement；
2.1.2) required according to process, remove oversheath, the metallic sheath of two end cables, retain waterstop, here mistake
Guarantee in journey that cable semi-conductive layer is not damaged；
2.1.3) will be clean for cable metal set removing surface, metallic sheath port is expanded into horn mouth with specific purpose tool, is used
Horn mouth is processed rounding by file；
2.1.4) cable end is removed the part heating alignment of metallic sheath with heating coalignment；By wrapped for heating tape
Outside waterstop, it is more than 6 hours 80 ± 5 DEG C of heat time heating times that heating-up temperature is, it is ensured that the cable after heating can reach alignment to be needed
Will, after heating terminates, cable to be fixed with aluminum corner brace plate, allow cable to be cooled to ambient temperature, the time is no less than 8 hours；Alignment palintrope
Curvature is per 400mm cable segment lengths≤2mm gaps.
2.2) exploitation of cable semi-conductive layer and cable surface are processed；
2.2.1 cable metal sheath incision position is retained the long waterstops of 15mm), remaining removal；
2.2.2) cable external shield is divested according to technological requirement size, process semi-conductive layer and insulating barrier；
2.2.3) cable insulation surface treatment：Successively with 400 mesh, 600 mesh, 1500 mesh sand paperings, make cable master exhausted
Edge layer surface does not have cut and conductive particle, constantly at the uniform velocity moves in axial direction and peripheral direction in bruting process, it is to avoid in local
Position long-time polishing forms insulating surface depression, persistently checks insulating surface quality with glare light electric torch, after polishing during polishing
Size meet technological requirement, and keep clean with protecting film winding；
2.2.4) insulation screen process：Insulation screen fracture is vertical with cable axis, smooth, disconnected in insulation screen
Mouth scrapes the groove of 70 ± 5mm, and is extremely seamlessly transitted with insulation with 400 mesh, 600 mesh, 1500 mesh sand paperings successively, this process
It should be specifically noted that being unable to Damage to insulation, the sand paper of semi-conductive layer of polishing is without being used further to insulating barrier of polishing.
3) transition joint major insulation stress cone is installed：
3.1) parts suit and adapter body are installed；
3.1.1) the cable major insulation external diameter and adapter body stress cone internal diameter in orthogonal two direction are measured, outside cable major insulation
Footpath is bigger by 20 ± 5% than adapter body stress cone internal diameter；
3.1.2) as requested heat-shrink tube, copper shell, sealing ring are sequentially sleeved on cable；
3.1.3 locating clip is installed at long end), main body stress cone inner surface is cleaned clean and is dried up with blowing hot wind, use Buddhist nun
Imperial rod uniform application silicone oil, does interim protection with preservative film；Remove the preservative film on cable, be directed to head and be mounted in long end line core
On, and the insulating surface at long end, Semiconducting surface are cleaned are dried up with heat gun, and one layer four is wound on semiconductive face
Fluorothene band, is then uniformly coating multiple ester for filling, is smearing silicone oil for lubricating, be interim guarantor with preservative film
Shield, then makes stress cone be inserted in long end by loading instrument, slowly divests preservative film during being inserted in, until cable length end
Insulation is unloaded guide head and loads instrument after exposing 50mm.
3.2) connecting tube is crimped；
3.2.1) remove guide head, expose cable core, to straight two end cable；
3.2.2) connecting tube is put, after determining conductor thread core docking in place, selection pressure is touched and crimped with 75t pressure, is pressed
The sharp edge burr cleaning that rubs with the hands in connecting tube with file after connecing is dried up, and this operation will guarantee to crimp centrally located.
3.3) radome is installed；
3.3.1 copper braid over braid and connecting tube, radome are connected by screw fastening first), two pieces of radomes is buckled in
In connecting tube after through crimping, then interim fixation is done with PVC bands, remove PVC bands when main body pulls on radome；Copper braid over braid will
Covered by radome completely, it is ensured that the round and smooth docking dislocation-free impulse- free robustness of radome；
3.3.2) make telltale mark：Length K of the adapter body stress cone being enclosed within cable is measured, from aluminium hydraulic pressed connecting pipe center
K/2 is measured to cable short end direction and makees telltale mark；
3.3.3, after) drying up cable insulation, semi-conductive layer and radome surface cleaning, disposable glove is worn in cable
Surface of insulating layer uniformly coats multiple ester and smears silicone oil；
3.3.4) according to step 3.1.3) adapter body is pulled to cable short end telltale mark position by method, long end wound
Tetrafluoroethene band remove.
4) process of cable and joint external screen：
4.1) start to wind two-layer semi-conductive tape to adapter body two ends external shield end from cable two ends protective metal shell respectively
Mouthful, 55mm is overlapped, two ends protective metal shell overlaps 50mm；
4.2) start overlap joint winding copper mesh to 50mm on other end protective metal shell, two ends copper from cable metal sheath one end
Silk is tightened；
4.3) 6-8 layer insulating self-adhesive bands are wound outside copper mesh, wind one layer of PVC tape afterwards；
5) installation of copper shell:
5.1) sealing ring is loaded in the seal groove on copper housing flange, two ends copper shell is tightened together with bolt；
5.2) by copper shell encapsulating mouth upward, the space between copper shell tail end and protective metal shell is filled with fire-proof mud, to copper
Shell two ends carry out encapsulation process with cable metal sheath；
5.2.1) frosting treatment is carried out in copper shell tail end and cable metal sheath sealing lead region with steel brush；
5.2.2) bottoming process is carried out to the sealing lead position of cable metal sheath with aluminum strip first, reusable lead bar is to copper shell tail
End seal lead position carries out bottoming process；
5.2.3) sealing lead being carried out with leads, smearing uniform, compacting during sealing lead, length is not less than 120mm, and sealing lead process can not
More than 30 minutes, it is to avoid scald cable.
5.3) afterbody is processed；
5.3.1) water blocking tape and fluid sealant are twined and cable cover(ing) between at the sealing lead of copper shell two ends, water blocking tape is at least overlapped
The 150mm on cable jacket, by heat-shrink tube heat shrink, the wrapped fluid sealant of lap-joint, water blocking tape, waterproof at heat-shrink tube two ends
Strengthen sealing with outer wrapped black PVC adhesive tape；
5.3.2) by one group of A, B high tension cable fluid sealant with volume 1:2 ratio is poured in agitator and is stirred, from copper
Till shell encapsulating mouth is filled；
5.3.3 encapsulating mouth and copper housing flange are covered according to technological requirement), 3-4 layer water blocking tapes are wound；Covered with heat-shrinkable T bush
Lid flange and encapsulating mouth, heat shrink wind 3-4 layer water blocking tapes at heat-shrink tube two-port, wind 2 layers of black outside water blocking tape
PVC tape.
6) grounding：
Earth cable insulating stripping is removed, length is divested and is met technological requirement, the copper that bare exposed conductor inserts two bronze medal shells is connect
Compressed in pipe, and earth cable is crimped place's good seal with copper connecting tube with band, heat-shrinkable T bush, passed through ground protection case
Or grounding box is grounded.
It is compared with the prior art, the invention has the beneficial effects as follows：Patented technology specification of the present invention transition joint was installed
Flow process and points for attention in journey, randomness when effectively avoiding transition joint from installing, so that improve 500kV cable systems peace
Complete and stability.So as to realize that high tension cable (500kV cable systems) domesticizes, break International Power giant to field of cables
Technical monopoly, reduce high tension cable price, seize extra-high-tension cable technology commanding elevation.
Description of the drawings
Fig. 1 be step 2.1.4 of the present invention) in heating alignment after flexibility requirement schematic diagram；
Fig. 2 be step 2.2 of the present invention) in cable semi-conductive layer exploitation and cable surface process schematic diagram；
Fig. 3 be step 3 of the present invention) in transition joint major insulation stress cone scheme of installation；
Fig. 4 is step 4 of the present invention) in cable and joint external screen process schematic diagram.
Reference is：The part 1 of cable end removal metallic sheath, protective metal shell 2, semi-conductive layer 3, insulating barrier 4, cable
Long end 5, main body stress cone 6, radome 7, copper braid over braid 8, connecting tube 9, cable short end 10, telltale mark 11, adapter body 12,
Copper mesh 13, insulating self-adhesive band 14.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
A kind of 500kV cable systems transition joint mounting process, comprises the following steps：
1) construction condition confirms：
1.1) product standard and type is checked；
1.2) confirm that installation outfit is complete；
1.3) in-site installation purifies paulin and mobile air conditioner, it is ensured that, at 0-35 DEG C, air is relative for the temperature control of erecting bed
Humidity≤70%；
2) prepare before installing：
2.1) cable two ends are in place, heat alignment pretreatment, remove mechanical stress；
2.1.1) two end cables to be installed are put, and long end, the short end direction of cable is determined according to field requirement；
2.1.2) required according to process, remove oversheath, the metallic sheath of two end cables, retain waterstop, here mistake
Guarantee in journey that cable semi-conductive layer is not damaged；
2.1.3) will be clean for cable metal set removing surface, metallic sheath port is expanded into horn mouth with specific purpose tool, is used
Horn mouth is processed rounding by file；
2.1.4 Fig. 1) is combined, alignment is heated in the part 1 that cable end removes metallic sheath with heating coalignment；To add
The torrid zone is wrapped outside waterstop, and it is more than 6 hours 80 ± 5 DEG C of heat time heating times that heating-up temperature is, it is ensured that the cable energy after heating
Alignment needs being reached, after heating terminates, cable being fixed with aluminum corner brace plate, allow cable to be cooled to ambient temperature, the time is little no less than 8
When；After alignment, flexibility is per 400mm cable segment lengths≤2mm gaps.
2.2) exploitation of cable semi-conductive layer and cable surface are processed；In conjunction with Fig. 2
2.2.1 2 incision position of cable metal sheath is retained the long waterstops of 15mm), remaining removal；
2.2.2) cable external shield is divested according to technological requirement size, process semi-conductive layer 3 and insulating barrier 4；
2.2.3) cable insulation surface treatment：Successively with 400 mesh, 600 mesh, 1500 mesh sand paperings, make cable master exhausted
Edge layer surface does not have cut and conductive particle, constantly at the uniform velocity moves in axial direction and peripheral direction in bruting process, it is to avoid in local
Position long-time polishing forms insulating surface depression, persistently checks insulating surface quality with glare light electric torch, after polishing during polishing
Size meet technological requirement, and keep clean with protecting film winding；
2.2.4) insulation screen process：Insulation screen fracture is vertical with cable axis, smooth, disconnected in insulation screen
Mouth scrapes the groove of 70 ± 5mm, and is extremely seamlessly transitted with insulation with 400 mesh, 600 mesh, 1500 mesh sand paperings successively, this process
It should be specifically noted that being unable to Damage to insulation, the sand paper of semi-conductive layer of polishing is without being used further to insulating barrier of polishing.
3) transition joint major insulation stress cone is installed：In conjunction with Fig. 3
3.1) parts suit and adapter body are installed；
3.1.1) the cable major insulation external diameter and adapter body stress cone internal diameter in orthogonal two direction are measured, outside cable major insulation
Footpath is bigger by 20 ± 5% than adapter body stress cone internal diameter；
3.1.2) as requested heat-shrink tube, copper shell, sealing ring are sequentially sleeved on cable；
3.1.3 locating clip is installed at cable length end 5), 6 inner surface of main body stress cone cleaning totally and is used hot blow wind
Dry, with nylon rod uniform application silicone oil, interim protection is done with preservative film；Remove the preservative film on cable, be directed to head and be mounted in electricity
On the long end line core of cable, and the insulating surface at cable length end, Semiconducting surface are cleaned are dried up with heat gun, and in semiconductive
One layer of tetrafluoroethene band is wound on face, is then uniformly being coated multiple ester for filling, is being smeared silicone oil for lubricating, with guarantor
Fresh film does interim protection, then makes stress cone be inserted in cable length end by loading instrument, slow by preservative film during being inserted in
Divest, guide head is unloaded after 50mm is exposed in the insulation of cable length end and load instrument.
3.2) connecting tube is crimped；
3.2.1) remove guide head, expose cable core, to straight two end cable；
3.2.2) connecting tube 9 is put, and after determining conductor thread core docking in place, selection pressure is touched and crimped with 75t pressure, is pressed
The sharp edge burr cleaning that rubs with the hands in connecting tube with file after connecing is dried up, and this operation will guarantee to crimp centrally located.
3.3) radome 7 is installed；
3.3.1 copper braid over braid 8 and connecting tube, radome are connected by screw fastening first), two pieces of radomes is buckled in
In connecting tube after through crimping, then interim fixation is done with PVC bands, remove PVC bands when main body pulls on radome；Copper braid over braid will
Covered by radome completely, it is ensured that the round and smooth docking dislocation-free impulse- free robustness of radome；
3.3.2) make telltale mark：Length K of the adapter body stress cone being enclosed within cable is measured, from aluminium hydraulic pressed connecting pipe center
K/2 is measured to 10 direction of cable short end and makees telltale mark 11；
3.3.3, after) drying up cable insulation, semi-conductive layer and radome surface cleaning, disposable glove is worn in cable
Surface of insulating layer uniformly coats multiple ester and smears silicone oil；
3.3.4) according to step 3.1.3) adapter body is pulled to cable short end telltale mark position by method, long end wound
Tetrafluoroethene band remove.
4) process of cable and joint external screen：In conjunction with Fig. 4
4.1) start to wind two-layer semi-conductive tape to 12 two ends external shield of adapter body from cable two ends protective metal shell respectively
Port, overlaps 55mm, and two ends protective metal shell overlaps 50mm；
4.2) start overlap joint winding copper mesh 13 to 50mm on other end protective metal shell from cable metal sheath one end, two ends are used
Copper wire is tightened；
4.3) winding 6-8 layers insulating self-adhesive band 14 outside copper mesh, winds one layer of PVC tape afterwards；
5) installation of copper shell:
5.1) sealing ring is loaded in the seal groove on copper housing flange, two ends copper shell is tightened together with bolt；
5.2) by copper shell encapsulating mouth upward, the space between copper shell tail end and protective metal shell is filled with fire-proof mud, to copper
Shell two ends carry out encapsulation process with cable metal sheath；
5.2.1) frosting treatment is carried out in copper shell tail end and cable metal sheath sealing lead region with steel brush；
5.2.2) bottoming process is carried out to the sealing lead position of cable metal sheath with aluminum strip first, reusable lead bar is to copper shell tail
End seal lead position carries out bottoming process；
5.2.3) sealing lead being carried out with leads, smearing uniform, compacting during sealing lead, length is not less than 120mm, and sealing lead process can not
More than 30 minutes, it is to avoid scald cable.
5.3) afterbody process；
5.3.1) water blocking tape and fluid sealant are twined and cable cover(ing) between at the sealing lead of copper shell two ends, water blocking tape is at least overlapped
The 150mm on cable jacket, by heat-shrink tube heat shrink, the wrapped fluid sealant of lap-joint, water blocking tape, waterproof at heat-shrink tube two ends
Strengthen sealing with outer wrapped black PVC adhesive tape；
5.3.2) by one group of A, B high tension cable fluid sealant with volume 1:2 ratio is poured in agitator and is stirred, from copper
Till shell encapsulating mouth is filled；
5.3.3 encapsulating mouth and copper housing flange are covered according to technological requirement), 3-4 layer water blocking tapes are wound；Covered with heat-shrinkable T bush
Lid flange and encapsulating mouth, heat shrink wind 3-4 layer water blocking tapes at heat-shrink tube two-port, wind 2 layers of black outside water blocking tape
PVC tape.
6) grounding：
Earth cable insulating stripping is removed, length is divested and is met technological requirement, the copper that bare exposed conductor inserts two bronze medal shells is connect
Compressed in pipe, and earth cable is crimped place's good seal with copper connecting tube with band, heat-shrinkable T bush, passed through ground protection case
Or grounding box is grounded.
Raw materials used in the present invention, equipment, unless otherwise noted, is conventional raw material, the equipment of this area；In the present invention
Method therefor, unless otherwise noted, is the conventional method of this area.
The above, is only presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, every according to the present invention
Any simple modification, change and equivalent transformation that technical spirit is made to above example, still fall within the technology of the present invention side
The protection domain of case.
Claims (8)
1. a kind of 500kV cable systems transition joint mounting process, it is characterised in that：Comprise the following steps：
1) construction condition confirms：
1.1) product standard and type is checked；
1.2) confirm that installation outfit is complete；
1.3) in-site installation purifies paulin and mobile air conditioner, it is ensured that the temperature control of erecting bed at 0-35 DEG C, relative air humidity
≤ 70%；
2) prepare before installing：
2.1) cable two ends are in place, heat alignment pretreatment, remove mechanical stress；
2.2) exploitation of cable semi-conductive layer and cable surface are processed；
3) transition joint major insulation stress cone is installed：
3.1) parts suit and adapter body are installed；
3.2) connecting tube is crimped；
3.3) radome is installed；
4) process of cable and joint external screen:
4.1) start to wind two-layer semi-conductive tape to adapter body two ends external shield port from cable two ends protective metal shell respectively, take
55mm is met, two ends protective metal shell overlaps 50mm；
4.2) start overlap joint winding copper mesh to 50mm on other end protective metal shell from cable metal sheath one end, two ends are pricked with copper wire
Tightly；
4.3) 6-8 layer insulating self-adhesive bands are wound outside copper mesh, wind one layer of PVC tape afterwards；
5) installation of copper shell:
5.1) sealing ring is loaded in the seal groove on copper housing flange, two ends copper shell is tightened together with bolt；
5.2) by copper shell encapsulating mouth upward, the space between copper shell tail end and protective metal shell is filled with fire-proof mud, to copper shell
Two ends carry out encapsulation process with cable metal sheath；
5.3) afterbody is processed；
6) grounding：
Earth cable insulating stripping is removed, length is divested and is met technological requirement, bare exposed conductor is inserted in the copper connecting tube of two bronze medal shells
Compressed, and earth cable is crimped place's good seal with copper connecting tube with band, heat-shrinkable T bush, passed through ground protection case or connecing
Ground case is grounded.
2. a kind of 500kV cable systems transition joint mounting process as claimed in claim 1, it is characterised in that step 2.1)
Specifically include：
2.1.1) two end cables to be installed are put, and long end, the short end direction of cable is determined according to field requirement；
2.1.2) required according to process, remove oversheath, the metallic sheath of two end cables, retain waterstop, in the process
Guarantee that cable semi-conductive layer is not damaged；
2.1.3) will be clean for cable metal set removing surface, metallic sheath port is expanded into horn mouth with specific purpose tool, file is used
Horn mouth is processed rounding；
2.1.4) cable end is removed the part heating alignment of metallic sheath with heating coalignment；Blocking water wrapped for heating tape
Band outside, it is more than 6 hours 80 ± 5 DEG C of heat time heating times that heating-up temperature is, it is ensured that the cable after heating can reach alignment needs, plus
After accumulation of heat beam, cable being fixed with aluminum corner brace plate, allowing cable to be cooled to ambient temperature, the time is no less than 8 hours；After alignment, flexibility is every
400mm cables segment length≤2mm gaps.
3. a kind of 500kV cable systems transition joint mounting process as claimed in claim 1 or 2, it is characterised in that step
2.2) specifically include：
2.2.1 cable metal sheath incision position is retained the long waterstops of 15mm), remaining removal；
2.2.2) cable external shield is divested according to technological requirement size, process semi-conductive layer and insulating barrier；
2.2.3) cable insulation surface treatment：Successively with 400 mesh, 600 mesh, 1500 mesh sand paperings, cable main insulating layer is made
Surface does not have cut and conductive particle, constantly at the uniform velocity moves in axial direction and peripheral direction, it is to avoid in local location in bruting process
Long-time polishing forms insulating surface depression, persistently checks insulating surface quality, the chi after polishing with glare light electric torch during polishing
Very little meet technological requirement, and keep clean with protecting film winding；
2.2.4) insulation screen process：Insulation screen fracture is vertical with cable axis, smooth, scrapes in insulation screen fracture
Go out the groove of 70 ± 5mm, and extremely seamlessly transitted with insulation with 400 mesh, 600 mesh, 1500 mesh sand paperings successively, this process Ying Te
Damage to insulation Zhu Yi be unable to, the sand paper of semi-conductive layer of polishing is without being used further to insulating barrier of polishing.
4. a kind of 500kV cable systems transition joint mounting process as claimed in claim 1, it is characterised in that step 3.1)
Specifically include：
3.1.1) the cable major insulation external diameter and adapter body stress cone internal diameter in orthogonal two direction, cable major insulation external diameter ratio are measured
Adapter body stress cone internal diameter big 20 ± 5%；
3.1.2) as requested heat-shrink tube, copper shell, sealing ring are sequentially sleeved on cable；
3.1.3 locating clip is installed at long end), main body stress cone inner surface is cleaned clean and is dried up with blowing hot wind, use nylon rod
Uniform application silicone oil, does interim protection with preservative film；Remove the preservative film on cable, be directed to head and be mounted in the long end line core of cable
On, and the insulating surface at cable length end, Semiconducting surface are cleaned are dried up with heat gun, and one is wound on semiconductive face
Layer tetrafluoroethene band, is then uniformly coating multiple ester for filling, is smearing silicone oil for lubricating, make of preservative film temporarily
Protection, then makes stress cone be inserted in cable length end by loading instrument, slowly divests preservative film, Zhi Dao electricity during being inserted in
The insulation of cable length end is unloaded guide head after exposing 50mm and loads instrument.
5. a kind of 500kV cable systems transition joint mounting process as described in claim 1 or 4, it is characterised in that step
3.2) specifically include：
3.2.1) remove guide head, expose cable core, to straight two end cable；
3.2.2) connecting tube is put, after determining conductor thread core docking in place, selection pressure is touched and crimped with 75t pressure, after crimping
The sharp edge burr cleaning that rubs with the hands in connecting tube with file is dried up, and this operation will guarantee to crimp centrally located.
6. a kind of 500kV cable systems transition joint mounting process as claimed in claim 4, it is characterised in that step 3.3)
Specifically include：
3.3.1 copper braid over braid and connecting tube, radome are connected by screw fastening first), two pieces of radomes are buckled in and have been pressed
In connecting tube after connecing, then interim fixation is done with PVC bands, remove PVC bands when main body pulls on radome；Copper braid over braid will be completely
Covered by radome, it is ensured that the round and smooth docking dislocation-free impulse- free robustness of radome；
3.3.2) make telltale mark：Length K of the adapter body stress cone being enclosed within cable is measured, from aluminium hydraulic pressed connecting pipe center to electricity
Cable short end direction measures K/2 and makees telltale mark；
3.3.3, after) drying up cable insulation, semi-conductive layer and radome surface cleaning, disposable glove is worn in cable insulation
Layer surface uniformly coats multiple ester and smears silicone oil；
3.3.4) according to step 3.1.3) adapter body is pulled to cable short end telltale mark position by method, four that long end is wound
Fluorothene band removes.
7. a kind of 500kV cable systems transition joint mounting process as claimed in claim 1, it is characterised in that step 5.2)
Specifically include：
5.2.1) frosting treatment is carried out in copper shell tail end and cable metal sheath sealing lead region with steel brush；
5.2.2) bottoming process is first carried out to the sealing lead position of cable metal sheath with aluminum strip, and reusable lead bar is sealed to copper shell tail end
Lead position carries out bottoming process；
5.2.3) sealing lead being carried out with leads, smearing uniform, compacting during sealing lead, length is not less than 120mm, and sealing lead process is no more than
30 minutes, it is to avoid scald cable.
8. a kind of 500kV cable systems transition joint mounting process as described in claim 1 or 7, it is characterised in that step
5.3) specifically include：
5.3.1) water blocking tape and fluid sealant are twined and cable cover(ing) between at the sealing lead of copper shell two ends, water blocking tape at least snaps into electricity
150mm on cable oversheath, by heat-shrink tube heat shrink, the wrapped fluid sealant of lap-joint, water blocking tape at heat-shrink tube two ends, outside water blocking tape
Sealing strengthened by wrapped black PVC adhesive tape；
5.3.2) by one group of A, B high tension cable fluid sealant with volume 1:2 ratio is poured in agitator and is stirred, from copper shell
Till encapsulating mouth is filled；
5.3.3 encapsulating mouth and copper housing flange are covered according to technological requirement), 3-4 layer water blocking tapes are wound；Use heat-shrinkable T bush cladding process
Blue and encapsulating mouth, heat shrink wind 3-4 layer water blocking tapes at heat-shrink tube two-port, wind 2 layers of black PVC glue outside water blocking tape
Band.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610993023.6A CN106505509A (en) | 2016-11-11 | 2016-11-11 | A kind of 500kV cable systems transition joint mounting process |
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| CN201610993023.6A CN106505509A (en) | 2016-11-11 | 2016-11-11 | A kind of 500kV cable systems transition joint mounting process |
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| CN107658834A (en) * | 2017-09-29 | 2018-02-02 | 常州安凯特电缆有限公司 | A kind of combination presetting system transition joint of high-tension cable and its installation method |
| CN108134343A (en) * | 2017-12-22 | 2018-06-08 | 宁波东方电缆股份有限公司 | A kind of emergency repair method of three-core cable |
| CN108199334A (en) * | 2017-12-20 | 2018-06-22 | 国网北京市电力公司 | CA cable assembly |
| CN109167327A (en) * | 2018-08-29 | 2019-01-08 | 天津科博电缆科技发展有限公司 | A kind of welding machine Special integrated cable and its manufacturing method |
| CN109301768A (en) * | 2018-10-27 | 2019-02-01 | 中国海洋石油集团有限公司 | A kind of emergency repair method of seabed three-core cable |
| CN109962442A (en) * | 2019-03-21 | 2019-07-02 | 上海三原电缆附件有限公司 | A kind of sealing structure of plastic-aluminum combined sheath high-voltage cable joint |
| CN111293568A (en) * | 2020-03-13 | 2020-06-16 | 广东省工业设备安装有限公司 | Cable joint injection molding hot melting recovery method and cable joint injection molding hot melting recovery device |
| CN115173190A (en) * | 2022-06-30 | 2022-10-11 | 江苏中天科技电缆附件有限公司 | Grounding sealing mode of large-length high-voltage cable |
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| CN115173190A (en) * | 2022-06-30 | 2022-10-11 | 江苏中天科技电缆附件有限公司 | Grounding sealing mode of large-length high-voltage cable |
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Application publication date: 20170315 |