CN200953455Y - Electric cable heat-shrinkable middle joint - Google Patents
Electric cable heat-shrinkable middle joint Download PDFInfo
- Publication number
- CN200953455Y CN200953455Y CN 200620046174 CN200620046174U CN200953455Y CN 200953455 Y CN200953455 Y CN 200953455Y CN 200620046174 CN200620046174 CN 200620046174 CN 200620046174 U CN200620046174 U CN 200620046174U CN 200953455 Y CN200953455 Y CN 200953455Y
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Abstract
The utility model discloses a thermal shrinkable center coupling of cables with two sections of cables at the two ends separately. The utility model comprises: a connection pipe, whose two ends are connected with wire cores of two cables; inner semi-conducting layer comprising a stress control pipe and filling glue, which wrap the connection pipe and inner semi-conducting layer of the two sections of cables; two oil blocking pipes, arranged outside the oilpaper of the two sections of cables; an insulated layer wrapping the connection pipe, oil blocking pipe, and stress control pipe; external semi-conducting layer wrapping the insulated layer and external semi-conducting layer of two sections of cables; an external screening layer wrapping the external semi-conducting layer and lead protection sleeve of two sections of cables; and a sleeve pipe wrapping the external screening layer. The utility model solves the difficulty of changing one end into two ends and avoids the issue that the cable is not long enough after replacing the original coupling; meanwhile, the utility model also eliminates hidden troubles to power supply system caused by unfavorable factors such as the distortion of lead center coupling, oil leakage, etc, and provides mechanic protection for oilpaper insulated cables in the position of center coupling.
Description
Technical field
The utility model relates to connector, particularly power cable transition joint.
Background technology
Existing 35kV oil-impregnated paper insulation power cable all adopts plumbous shell type transition joint.Mainly there is following defective in plumbous shell type transition joint:
(1) after the tube connector crimping is finished, is to adopt the pitch heating and melting that it is filled and led up or adopt aluminium foil that it is filled and led up, outside tube connector, increases around semiconductive paper, insulating tape then for the processing of load mould.Because the deformation of tube connector causes pitch or the aluminium foil in the load mould to have air gap with increasing between insulation, and the cable oil in the lead sleeve can not enter into and increases around insulation innerly, and local field strength is higher, causes bubble-discharge, finally can cause the joint puncture.
(2) under the effect of expanding with heat and contract with cold, when temperature reduces, cable oil volume in the lead sleeve can reduce, and whole lead sleeve is under the whole sealing status, at this moment, can produce negative pressure in the lead sleeve, under external atmospheric pressure, the oil in the cable insulation of joint two ends is flowed in the joint, will make the insulating barrier of this place's cable withered like this, cause decreasing insulating, and then dielectric breakdown accident takes place.
(3) plumbous shell type transition joint need be warded off plumbous the processing at cable jacket and lead sleeve junction, to reach sealing purpose, but owing to ward off the influence that plumbous place is easy to be subjected to the exterior mechanical vibrations, so, the phenomenon that meeting generation leakage of oil, joint built-in electrical insulation make moist, cause the splice insulation decreased performance, and then insulation breakdown takes place.
Summary of the invention
The purpose of this utility model is to provide a kind of cable pyrocondensation transition joint, has solved the pyrocondensation transition joint and has been applied in a stifled oily difficult problem on the paper oil insulation cable, and useful life will be longer first watch than plumbous shell type indirect, and it is littler influenced by installation environment.
For achieving the above object, the technical solution of the utility model is:
Cable pyrocondensation transition joint, its two ends connect two sections cables, comprising: tube connector, its two ends connect the core of two sections cables respectively; Interior semi-conductive layer comprises stress control tube and fills glue, and it is coated on tube connector and institute connects outside the interior semi-conductive layer of two sections cables reservations; Two stifled oil pipes are sheathed on respectively outside the oilpaper layer of two sections cables; Insulating barrier is coated on outside tube connector, stifled oil pipe, the stress control tube; Outer semiconducting layer, the coated insulation layer and connect outside the outer semiconducting layer that two sections cables reserve; Outer shielding layer is coated on outside the lead sheath layer of the outer and two sections cables of outer semiconducting layer; The oversheath pipe is coated on outside the outer shielding layer.
Described tube connector designs for extended type, and the centre is a solid construction, and both sides are provided with the cavity body structure that the current supply cable core plugs.Because tube connector is a solid construction, has so just guaranteed that the oil in the core can not flow mutually; Add the effect of stifled oil pipe, make that the oil in the insulating paper can not flow, avoided the issuable influence of insulating of interaction partners between cable oil and the outer material contracting with heat simultaneously.So just got rid of the unfavorable factor that causes insulating performance of cable decline owing to the loss of joint both sides cable oil.
Described outer shielding layer is a copper mesh.
Specifically, tube connector is used for the stube cable core, has stifled oil effect simultaneously, prevents that cable oil from flowing through core;
Interior semi-conductive layer comprises stress control tube and fills glue that it is the interior semi-conductive layer that recovers transition joint inside that stress control tube mainly acts on, and controls the internal stress effect simultaneously.Fill glue and be mainly used in the space of filling between core and the main insulation.
Filling glue wrapped outside tube connector is semiconductive material, be used to recover the interior semi-conductive layer of cable on the one hand, can effectively fill the load mould in the tube connector outside on the other hand, after the heating, filling glue can melt, so just the air gap between tube connector and the stress control tube can be got rid of fully, be guaranteed that joint inside can not produce electric discharge phenomena.
Stifled oil reservoir is mainly used in the prevention cable oil and contacts with other material contracting with heats, prevents that cable oil from flowing.
Insulating barrier is made of jointly the insulated tube of insulated tube and outside band semi-conductive layer, plays reinforced insulation and holds concurrently and recover outer semiconducting layer.
Outer semiconducting layer is formed jointly by the semiconductive pipe with the semi-conductive layer in the insulated tube outside of being with semi-conductive layer, thereby is recovered the complete outer semiconducting layer structure of cable.
Outer shielding layer is used for the cable lead sheath at transition joint two ends is coupled together, and recovers the outer shielding layer of cable.
The oversheath pipe is used to recover the outer jacket structure of cable, and outside waterproof, mechanical protection are carried out in transition joint.
The utility model joint equal wrapped fluid sealant at two ends in every layer material installation process has played the excellent waterproof sealing function.In addition, add the application of oversheath pipe, make to have formed good waterproof, mechanical protection between joint two ends and the cable jacket.This sealing function is not subjected to the influence of extraneous mechanical shock, can guarantee the long-term safety operation of joint.
Beneficial effect of the present invention:
The utility model joint has solved the difficult problem of " becomes two ", promptly by the extended type design to the annex material, can avoid the not enough situation of cable length when changing original joint, remedies the deficiency of cable core length with the tube connector of lengthening.Simultaneously, the utility model has also eliminated because the hidden danger that unfavorable factors such as the deformation of existing plumbous shell type transition joint, leakage of oil are brought to electric power system solves the mechanical protection problem of paper oil insulation cable at the transition joint position; In addition, the utility model has been simplified original joint mounting process, shortens fault handling time, improves the breakdown repair operating efficiency.
Description of drawings
Fig. 1 is a cutaway view of the present utility model.
Embodiment
Referring to Fig. 1, cable pyrocondensation transition joint of the present utility model, its two ends connect two sections cables 9,10, comprise, tube connector 1,101 is solid construction in the middle of it, both sides 102,103 are provided with the cavity body structure that current supply cable 9,10 cores plug; Interior semi-conductive layer 2 comprises stress control tube 21 and fills glue 22; Outside the interior semi-conductive layer that it is coated on tube connector 1 and the cable 9,10 that is connected is reserved; Two stifled oil pipes 3,4 are sheathed on respectively outside the oilpaper layer of two sections cables 9,10; Insulating barrier 5 comprises insulated tube 51 and the insulated tube 52 of being with semi-conductive layer, and it is coated on outside tube connector 1, stifled oil pipe 3,4 and the stress control tube 21; Outer semiconducting layer 6, the insulated tube 63 that comprises semiconductive pipe 61, filling glue 62 and band semi-conductive layer, outside the outer semiconducting layer that its coated insulation layer 5 and cable 9,10 are reserved, the insulated tube 52 of the insulated tube 63 of band semi-conductive layer, band semi-conductive layer can be structure as a whole; Outer shielding layer 7 is coated on outside the outer semiconducting layer and outside the lead sheath layer of cable 9,10, this outer shielding layer 7 adopts copper mesh; Oversheath pipe 8 is coated on outside the outer shielding layer 7.
(describe) during installation, plumbous shell type transition joint is cut open, remove lead sleeve, tape, aluminium foil, teflin tape etc. so that plumbous shell type transition joint is transform as example.With tube connector and core (about 100mm) excision, two ends respectively strip out the long core of 60mm behind the excision tube connector by designing requirement, oil-immersed insulating paper ladder step residue 80mm; Open the stripping lead sheath, make and to open size after the stripping to block side with core be benchmark, long 295mm, wherein the semiconductive pipe accounts for 20mm; Oil-paper is opened stripping, peels off surperficial two-layer oil-immersed insulating paper, is used to install stifled oil pipe; The wrapped filling glue in lead sheath edge; The semiconductive pipe is installed, stifled oil pipe is installed again, attention should evenly be heated, and gets rid of inner air; The insulated tube 52 of stress control tube 21, insulated tube 51, band semi-conductive layer and oversheath pipe 8 are inserted on the cable of a side wherein successively by order from inside to outside, then cable core are inserted in the cavity body structure of tube connector, carry out crimping with the ring pressing tongs.Heat-shrink tube heat shrink except the design general beyond the protecting pipe; Afterwards, wrapped outer shielding layer 7-copper mesh outside insulated tube, copper mesh should keep 50% putting up and contact well with the cable lead sheath, with constant force spring 11 outer shielding layer 7-copper mesh are fixed on the lead sheath, and are with the copper stickup constant force spring 11 is taken up; Press designing requirement at last with oversheath pipe 8 heat shrink.
Claims (5)
1. cable pyrocondensation transition joint, its two ends connect two sections cables, it is characterized in that, comprising:
Tube connector, its two ends connect the core of two sections cables respectively;
Interior semi-conductive layer comprises stress control tube and fills glue; It is coated on tube connector and connect outside the interior semi-conductive layer that two sections cables reserve;
Two stifled oil pipes are sheathed on respectively outside the oilpaper layer of two sections cables;
Insulating barrier is coated on outside tube connector, stifled oil pipe, the stress control tube;
Outer semiconducting layer, the coated insulation layer and connect outside the outer semiconducting layer that two sections cables reserve;
Outer shielding layer is coated on outside the lead sheath layer of the outer and two sections cables of outer semiconducting layer;
The oversheath pipe is coated on outside the outer shielding layer.
2. cable pyrocondensation transition joint as claimed in claim 1 is characterized in that described tube connector designs for extended type, and the centre is a solid construction, and both sides are provided with the cavity body structure that the current supply cable core plugs.
3. cable pyrocondensation transition joint as claimed in claim 1 is characterized in that described outer shielding layer is a copper mesh.
4. cable pyrocondensation transition joint as claimed in claim 1 is characterized in that, described stifled oil reservoir is to hate the oil type heat-shrink tube for what avoid insulating oil to run off increasing newly.
5. cable pyrocondensation transition joint as claimed in claim 1 is characterized in that, described insulating barrier is made of jointly the insulated tube of insulated tube and outside band semi-conductive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620046174 CN200953455Y (en) | 2006-09-22 | 2006-09-22 | Electric cable heat-shrinkable middle joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620046174 CN200953455Y (en) | 2006-09-22 | 2006-09-22 | Electric cable heat-shrinkable middle joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200953455Y true CN200953455Y (en) | 2007-09-26 |
Family
ID=38811756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620046174 Expired - Lifetime CN200953455Y (en) | 2006-09-22 | 2006-09-22 | Electric cable heat-shrinkable middle joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200953455Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969690A (en) * | 2012-12-21 | 2013-03-13 | 江苏普朗克电力科技有限公司 | Outdoor terminal with reliable sealing structure |
| CN103401207A (en) * | 2013-07-23 | 2013-11-20 | 国家电网公司 | Heat-shrinkable intermediate cable joint |
| CN105449623A (en) * | 2015-12-03 | 2016-03-30 | 成都格瑞思文化传播有限公司 | Cable intermediate joint |
| CN106816835A (en) * | 2017-02-24 | 2017-06-09 | 国网山东省电力公司临沂供电公司 | Single cable docking facilities |
| CN108599059A (en) * | 2018-06-29 | 2018-09-28 | 苏州优康通信设备有限公司 | A kind of wire or cable terminal box with anti-interference function |
| CN108767781A (en) * | 2018-06-29 | 2018-11-06 | 苏州优康通信设备有限公司 | A kind of detachable anti-interference cable terminal box |
| CN108899832A (en) * | 2018-06-29 | 2018-11-27 | 苏州优康通信设备有限公司 | A kind of fire-retardant terminal box |
| CN109066117A (en) * | 2018-06-29 | 2018-12-21 | 武汉船用机械有限责任公司 | A kind of novel branch cable |
| CN110994533A (en) * | 2020-01-13 | 2020-04-10 | 埃塞克斯电气(南京)有限公司 | Cable intermediate joint |
-
2006
- 2006-09-22 CN CN 200620046174 patent/CN200953455Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969690A (en) * | 2012-12-21 | 2013-03-13 | 江苏普朗克电力科技有限公司 | Outdoor terminal with reliable sealing structure |
| CN103401207A (en) * | 2013-07-23 | 2013-11-20 | 国家电网公司 | Heat-shrinkable intermediate cable joint |
| CN105449623A (en) * | 2015-12-03 | 2016-03-30 | 成都格瑞思文化传播有限公司 | Cable intermediate joint |
| CN106816835A (en) * | 2017-02-24 | 2017-06-09 | 国网山东省电力公司临沂供电公司 | Single cable docking facilities |
| CN106816835B (en) * | 2017-02-24 | 2018-01-12 | 国网山东省电力公司临沂供电公司 | Single cable docking facilities |
| CN108599059A (en) * | 2018-06-29 | 2018-09-28 | 苏州优康通信设备有限公司 | A kind of wire or cable terminal box with anti-interference function |
| CN108767781A (en) * | 2018-06-29 | 2018-11-06 | 苏州优康通信设备有限公司 | A kind of detachable anti-interference cable terminal box |
| CN108899832A (en) * | 2018-06-29 | 2018-11-27 | 苏州优康通信设备有限公司 | A kind of fire-retardant terminal box |
| CN109066117A (en) * | 2018-06-29 | 2018-12-21 | 武汉船用机械有限责任公司 | A kind of novel branch cable |
| CN110994533A (en) * | 2020-01-13 | 2020-04-10 | 埃塞克斯电气(南京)有限公司 | Cable intermediate joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070926 |
|
| EXPY | Termination of patent right or utility model |