CN2582240Y - Dry, prefabricated and capacitance type cable terminal - Google Patents

Dry, prefabricated and capacitance type cable terminal Download PDF

Info

Publication number
CN2582240Y
CN2582240Y CN 02282771 CN02282771U CN2582240Y CN 2582240 Y CN2582240 Y CN 2582240Y CN 02282771 CN02282771 CN 02282771 CN 02282771 U CN02282771 U CN 02282771U CN 2582240 Y CN2582240 Y CN 2582240Y
Authority
CN
China
Prior art keywords
stress cone
taper
capacitance
root
graded bushing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 02282771
Other languages
Chinese (zh)
Inventor
许建国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN 02282771 priority Critical patent/CN2582240Y/en
Application granted granted Critical
Publication of CN2582240Y publication Critical patent/CN2582240Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Cable Accessories (AREA)

Abstract

The utility model relates to a dry, prefabricated and capacitance type cable terminal, which is composed of an inverse conical capacitance bushing, a stress cone, end conductors, a root part shielding drum, etc. The utility model is characterized in that the interior of the main insulation of the inverse conical capacitance bushing is provided with capacitance plates which are in a coaxial staggered arrangement from inside to outside and from top to bottom; the inner surface of the root part of the inverse conical capacitance bushing is in the shape of a bell mouth and is matched with the shape of the outer surface of a conical isolated terminal of the stress cone in close contact without a gap. The utility model has the advantages of prefabrication by factories, on-site assembly, easy controlled quality, dry type insulation without oil filling, convenient operation and maintenance and good effect on voltage sharing; the utility model can be used for extra-high-tension cables.

Description

Dry type prefabricated capacitor type cable termination
Technical field the utility model relates to a kind of dry insulation prefabricated capacitor type cable termination, belongs to the electric cable accessories field.
Background technology is present, and 35kV and following plastic insulation power cable mostly adopt the prefabricated terminals, and these prefabricated cable terminals all adopt rubber and plastic class material, and it is no longer oil-filled, be usually said dry insulation, thus easy to install, in service without repair and maintenance.Yet the terminals of patterns such as the general wrapped banding pattern that uses of the above plastic insulation high-tension cable of 35kV, prefabricated plug-in type also do not have dry type prefabricated product at present.Wrapped banding pattern can be made dry insulation, but need make at building-site, can't be prefabricated in the factory and carry out quality inspection, and the site operation cycle is long, more difficult control of quality.Advanced is prefabricated plug-in type at present, its core component stress cone adopts ethylene-propylene rubber or silastic material, make in advance in factory, can carry out strict quality inspection in factory, at the scene of laying it is set on the cable insulation, its outer suit insulated porcelain sleeve is filled insulating oil again between insulated porcelain sleeve and stress cone-cable insulation.Prefabricated plug-type advantage is that its core component can be tested in factory, and it is little to lay the work on the spot amount, thereby is easy to control of quality; Its shortcoming is that the effect of stress cone reduction root field intensity is limited, thereby makes with dry insulation fully than difficulty, also needs to fill insulating oil, thereby relatively heavier, and the operation maintenance workload is also bigger.
Hydraulic oil paper insulation power cable is used the tapered terminal fitting box of electric capacity always.Such as, " power cable design principle " (Zhuo Jinyu writes a book, Beijing: China Machine Press, 1994.4) introduced the tapered terminal of a kind of prefabricated electric capacity, its primary structure is: the electric capacity awl that is used for all pressing surrounds bakelite tube, the bakelite tube that will have the electric capacity awl during construction is enclosed within the cable insulation outside, and ground floor pole plate on the bakelite tube (zero screen) is led core with cable and is connected, and outermost layer pole plate (end screen) connects cable shield.Suit insulated porcelain sleeve outside the electric capacity awl, the space segment in the insulator is filled with cable insulating oil.The advantage of electric capacity wimble structure is that the effect specific stress wimble structure of reduction root electric field strength is much better, therefore is used for high-tension cable.This structure is applicable to the paper oil insulation cable, but is unsuitable for plastic insulated cable, because there is certain slit between bakelite tube and the cable insulation, this slit needs the insulating oil of high electric strength to fill.For oil paper cable, the processing of insulating oil, check are necessary, and concerning plastic cable, then should avoid using, and adopt dry insulation as far as possible.
The purpose of this utility model is to overcome the shortcoming of above prior art, for the high-pressure plastic insulated power cable designs a kind of dry insulation, prefabricate, terminal fitting with capacitor voltage equalizing structure.
Summary of the invention to achieve these goals, the utility model adopts following project organization:
Dry type prefabricated capacitor type cable termination, by anti-taper capacitance graded bushing, stress cone, the end electric conductor, compositions such as root casing, it is characterized in that: have the electric conducting material of the arranged in co-axial alignment that staggers successively from the inside to the outside or the capacitance plate that semiconductive material is made in the main insulation of described anti-taper capacitance graded bushing from top to bottom, the inner surface of the root insulating cylinder of described anti-taper capacitance graded bushing is that the little lower end diameter of upper end diameter is toroidal greatly, the insulating end outer surface of described stress cone is that the little lower end diameter of upper end diameter is tapered greatly, the taper insulated outer surface shape of the toroidal inner surface of the root insulating cylinder of described anti-taper capacitance graded bushing and described stress cone is coincide and be there is no slots close and contact, the root insulating cylinder of the toroidal of described anti-taper capacitance graded bushing is made by the high electric strength insulating material, and described stress cone is made by elastomeric material.
Except above-mentioned essential features, can replenish following technology contents in concrete the enforcement:
Described stress cone is withstood by the stress cone carriage with spring, make it to contact tightr with the inner surface of the root insulating cylinder of described anti-taper capacitance graded bushing.
Interior one deck capacitance plate (zero screen) is led core with cable and is electrically connected, and outermost one deck capacitance plate (end screen) is electrically connected with the metal screen layer of cable.
The utlity model has following characteristics:
1. anti-taper capacitance graded bushing, stress cone etc. all are solid materials, and be not oil-filled in the cable termination, is the dry insulation structure, installs simply, moves non-maintaining.
2. anti-taper capacitance graded bushing, stress cone etc. are all made in factory and check, and assembly working is only carried out in the job site, and short construction period is easy to control of quality.
3. the mode that adopts the electric capacity awl to combine with stress cone, under situation reasonable in design, much lower when the maximum field strength ratio in the cable termination adopts stress cone merely.Therefore, the utility model cable termination can be used for the plastic insulation power cable of supergrid.
Description of drawings Fig. 1 is anti-taper capacitance graded bushing structural representation.
Fig. 2 is the stress cone structural representation.
Fig. 3 is the structural representation that cable termination and cable are assembled together.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.Embodiment the utility model dry type prefabricated capacitor type cable termination is made up of anti-taper capacitance graded bushing (Fig. 1), stress cone (Fig. 2), end electric conductor 10, root casing 17 etc.The first half of anti-taper capacitance graded bushing (Fig. 1) is identical with common capacitance graded bushing, all is to be born along face insulation task by outer surface; Its latter half is then opposite with ordinary casing, is to be born along face insulation task by inner surface, therefore is referred to as anti-taper capacitance graded bushing.The inner surface of the root insulating cylinder 5 of this sleeve pipe is the big toroidal of the little lower end diameter of upper end diameter (being referred to as anti-cone-shaped inner surface); The outer surface of the insulating end 8 of stress cone (Fig. 2) is similarly the big taper of the little lower end diameter of upper end diameter (being referred to as positive conical outer surface); And the positive taper external surface shape of the anti-cone-shaped inner surface of sleeve pipe and stress cone matches, and they can closely contact in seamless unoccupied place under certain pressure.For guaranteeing contact closely, stress cone is made by elastomeric material.The root insulating cylinder 5 of the toroidal of anti-taper capacitance graded bushing by the electric and all higher insulating material of mechanical strength make (such as, can use fiber glass epoxy).The upper end continued access pipe of toroidal insulating cylinder 5 (as shown in Figure 2, pipe and horn mouth tube can be made into one).Pipe and horn mouth tube are made sleeve pipe main insulation 3 outward, and the capacitance plate 4 of the arranged in co-axial alignment that from top to bottom staggers successively from the inside to the outside is set in sleeve pipe main insulation 3, and capacitance plate 4 is made by electric conducting material (such as aluminium foil) or semiconductive material (such as the semiconductive resin).Sleeve pipe main insulation 3 and capacitance plate 4 constitute the capacitance core of anti-taper.The outer environment for use according to cable termination of capacitance core is installed oversheath 2.Such as, for the cable termination that in atmospheric environment, uses, can install the oversheath 2 of band silicon rubber full skirt; To being used for the cable termination of transformer, oversheath 2 should be able to tolerate transformer oil; To being used for the cable termination of SF6 air insulating device, oversheath 2 should adopt the insulating material manufacturing that adapts.The end of anti-taper (top) is installed end envelope 1 and flange 6 respectively with root (bottom).
The insulating end 8 and the conducting end 9 of stress cone (Fig. 2) all use elastomeric material (such as silicon rubber, ethylene-propylene rubber etc.) to make.
When install the job site, cable is peelled off sheath, scraped off the screen outside the cable main insulation 21; Be set to root casing 17, spring 16, stress cone carriage 15 on the cable body downwards in advance; Stress cone is set to outside the main insulation 21, anti-taper is set on the stress cone; End electric conductor 10 and cable are led core 20 firm crimping; With screw 12 anti-taper is fixed on the end electric conductor 10, between end electric conductor 10 and the end envelope 1 sealing ring 13 is housed; Stress cone shifted onto with anti-taper closely contact, the afterbody of the conducting end 9 of stress cone is fixed on the cable insulation outer shielding layer 22; Stress cone carriage 15, spring 16, root casing 17 are upwards return, root casing 17 is connected with the flange 6 of anti-taper with screw 14; With encapsulant 18 (such as fluid sealant or lead sealing) root casing 17 is fixed on the cable jacket 23.At last end cap 11 is fixed on the end electric conductor 10.

Claims (2)

1. dry type prefabricated capacitor type cable termination, by anti-taper capacitance graded bushing, stress cone, the end electric conductor, compositions such as root casing, it is characterized in that: have the electric conducting material of the arranged in co-axial alignment that staggers successively from the inside to the outside or the capacitance plate that semiconductive material is made in the main insulation of described anti-taper capacitance graded bushing from top to bottom, the inner surface of the root insulating cylinder of described anti-taper capacitance graded bushing is that the little lower end diameter of upper end diameter is toroidal greatly, the insulating end outer surface of described stress cone is that the little lower end diameter of upper end diameter is tapered greatly, the taper insulated outer surface shape of the toroidal inner surface of the root insulating cylinder of described anti-taper capacitance graded bushing and described stress cone is coincide and be there is no slots close and contact, the root insulating cylinder of the toroidal of described anti-taper capacitance graded bushing is made by the high electric strength insulating material, and described stress cone is made by elastomeric material.
2. dry type prefabricated capacitor type cable termination as claimed in claim 1, it is characterized in that: described stress cone is withstood by the stress cone carriage by spring, makes described stress cone insulating end outer surface and seamless tight contact of the inner surface of the root insulating cylinder of described anti-taper capacitance graded bushing.
CN 02282771 2002-11-01 2002-11-01 Dry, prefabricated and capacitance type cable terminal Expired - Fee Related CN2582240Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02282771 CN2582240Y (en) 2002-11-01 2002-11-01 Dry, prefabricated and capacitance type cable terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02282771 CN2582240Y (en) 2002-11-01 2002-11-01 Dry, prefabricated and capacitance type cable terminal

Publications (1)

Publication Number Publication Date
CN2582240Y true CN2582240Y (en) 2003-10-22

Family

ID=33744783

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 02282771 Expired - Fee Related CN2582240Y (en) 2002-11-01 2002-11-01 Dry, prefabricated and capacitance type cable terminal

Country Status (1)

Country Link
CN (1) CN2582240Y (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100448130C (en) * 2006-04-24 2008-12-31 王钰 Prefabricated high-voltage cable terminal
CN101930818A (en) * 2009-06-18 2010-12-29 Abb技术有限公司 High-tension apparatus
CN102386603A (en) * 2011-10-21 2012-03-21 国网电力科学研究院 High-voltage direct-current cable terminal using shielding cylinder
CN102906955A (en) * 2010-05-21 2013-01-30 Abb研究有限公司 A high voltage direct current cable termination apparatus
CN103869227A (en) * 2014-04-02 2014-06-18 上海华普电缆有限公司 Terminal for partial discharge tests on crosslinked polyethylene power cable of 10 kV or lower
CN105743053A (en) * 2014-12-08 2016-07-06 北京瑞恒新源投资有限公司 Capacitive cable terminal without insulating medium filling
CN106025996A (en) * 2016-07-25 2016-10-12 常州市拓源电缆成套有限公司 Waterproof outdoor cable terminal for railways
CN106469594A (en) * 2015-08-19 2017-03-01 北京天威瑞恒高压套管有限公司 High voltage insulation structure, cable termination, bus, bushing and bushing shell for transformer
CN110492425A (en) * 2019-08-02 2019-11-22 南京智达电气设备有限公司 A kind of indoor and outdoor terminal of novel high-pressure power cable

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100448130C (en) * 2006-04-24 2008-12-31 王钰 Prefabricated high-voltage cable terminal
CN101930818A (en) * 2009-06-18 2010-12-29 Abb技术有限公司 High-tension apparatus
CN101930818B (en) * 2009-06-18 2015-04-01 Abb技术有限公司 High voltage device
CN102906955A (en) * 2010-05-21 2013-01-30 Abb研究有限公司 A high voltage direct current cable termination apparatus
CN102906955B (en) * 2010-05-21 2015-09-23 Abb研究有限公司 High-voltage direct-current cable terminal device
CN102386603B (en) * 2011-10-21 2014-02-05 国网电力科学研究院 High-voltage direct-current cable terminal using shielding cylinder
CN102386603A (en) * 2011-10-21 2012-03-21 国网电力科学研究院 High-voltage direct-current cable terminal using shielding cylinder
CN103869227A (en) * 2014-04-02 2014-06-18 上海华普电缆有限公司 Terminal for partial discharge tests on crosslinked polyethylene power cable of 10 kV or lower
CN103869227B (en) * 2014-04-02 2016-07-06 上海华普电缆有限公司 10kV and following cross-inked polyethylene power cable shelf depreciation test terminal
CN105743053A (en) * 2014-12-08 2016-07-06 北京瑞恒新源投资有限公司 Capacitive cable terminal without insulating medium filling
CN105743053B (en) * 2014-12-08 2019-02-05 北京瑞恒新源投资有限公司 A kind of capacitance type cable terminal being not filled with dielectric
CN106469594A (en) * 2015-08-19 2017-03-01 北京天威瑞恒高压套管有限公司 High voltage insulation structure, cable termination, bus, bushing and bushing shell for transformer
CN106469594B (en) * 2015-08-19 2018-05-29 北京天威瑞恒高压套管有限公司 Bushing shell for transformer
CN106025996A (en) * 2016-07-25 2016-10-12 常州市拓源电缆成套有限公司 Waterproof outdoor cable terminal for railways
CN110492425A (en) * 2019-08-02 2019-11-22 南京智达电气设备有限公司 A kind of indoor and outdoor terminal of novel high-pressure power cable

Similar Documents

Publication Publication Date Title
CN1307764C (en) Cable terminal
CN2582240Y (en) Dry, prefabricated and capacitance type cable terminal
CN205050651U (en) High -tension bushing and isolated bus
CN105449620A (en) Dry-type power cable terminal
CN202333561U (en) Contact box used in high-voltage switch cabinet
CN105743053B (en) A kind of capacitance type cable terminal being not filled with dielectric
CN2912054Y (en) Prefabricating high voltage cable terminal
CN106469594A (en) High voltage insulation structure, cable termination, bus, bushing and bushing shell for transformer
CN201860065U (en) Glue-impregnated capacitance type direct-current wall bushing
CN204376358U (en) 500kV twisted polyethylene cable accessory structure
CN109327006A (en) A kind of preparation method of cable termination main part and cable termination using the main part
CN103748641B (en) Including the high voltage device of insulation system
WO2021008799A1 (en) Instrument transformer and method to isolate parts
CN100448130C (en) Prefabricated high-voltage cable terminal
CN1195304C (en) Epoxy resin dipping fibre high voltage insulation core body
CN210927054U (en) Novel indoor and outdoor terminal of high-voltage power cable
CN211556826U (en) Fully prefabricated dry-type capacitive cable terminal
CN2497415Y (en) Dry-type high-voltage current transformer
CN2640084Y (en) Dry type high-pressure wall bushing
CN110492425A (en) A kind of indoor and outdoor terminal of novel high-pressure power cable
CN2590232Y (en) Dry type flexible cable termination end
CN219916819U (en) Multi-outlet capacitive sleeve
CN207718859U (en) Solid and gas mixed state insulated cable
CN2575813Y (en) Fast starting inductance ballast
CN101340074A (en) High voltage cable connector

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee