CN202183581U

CN202183581U - Cable GIS terminal

Info

Publication number: CN202183581U
Application number: CN2011203158220U
Authority: CN
Inventors: 王锦明; 钟海杰; 高飞; 李智文; 罗继辉; 周星星
Original assignee: CHANGYUAN ELECTRIC TECHNOLOGY Co Ltd
Current assignee: CHANGYUAN ELECTRIC TECHNOLOGY Co Ltd
Priority date: 2011-08-26
Filing date: 2011-08-26
Publication date: 2012-04-04
Anticipated expiration: 2021-08-26

Abstract

The utility terminal provides a cable GIS terminal, which comprises a contact, a conductor attaching clamp, a grading ring, a stress cone, a nylon cannula, springs, and a housing. The contact is arranged at a periphery of the conductor attaching clamp; the grading ring is arranged between the conductor attaching clamp and the stress cone; the tail end of the stress cone is in a taper shape and is in matched butt joint with the nylon cannula; two ends of the each of the spring apply axial pressures on the nylon cannula and the housing; and there are at least three springs that are arranged side by side. Beneficial effects of the utility model are as follows: the springs with axial expansion are arranged; because a spring that is generally large is changed into a plurality of small springs like six springs and the elastic modulus of the small springs is identical with that of the large spring, an occurrence of a vortex phenomenon that is generated by the large spring can be effectively avoided; the shape of the nylon cannula is changed from a long tail shape into a short tail shape, so that not only are costs saved but also it can be ensured that stress on the nylon cannula is uniform and interfacial pressures of the stress cone and a main insulation layer and an outer semiconductor layer are more reasonable.

Description

A kind of cable switch equipment GIS terminal

Technical field

The utility model relates to electric cable accessories, relates in particular to a kind of Cubicle Gas-Insulated Switchgear terminal of crosslinked cable.

Background technology

Along with the fast development of power industry, China increases the increasing demand of 110kV power cable and annex thereof, comprising Cubicle Gas-Insulated Switchgear (Gas-Insulated metal-enclosed Swith gear, GIS) terminal.

In the existing GIS terminal, a kind of be used to connect SF6 Cubicle Gas-Insulated Switchgear (GIS) and 110kV cross-linked polyethylene insulated cable (abbreviation crosslinked cable) are arranged.Its critical component is that epoxy bushing (is the inner cone insulator; Encapsulating stress cone) and stress cone; Epoxy bushing plays insulation, mechanical support and sealing function, and its stress cone is an ethylene propylene diene monomer (EPDM) material, is used to carry out electric field stress control; Adopt large-scale rubber injection technology, tail end is designed to flat construction.

Because in the GIS terminal; Be to rely on the elasticity of stress cone material self to keep stress and the electrical strength on the interface between stress cone and main insulating layer and other elements; And the ethylene-propylene rubber material that stress cone adopted in the above-mentioned existing GIS terminal is harder, is difficult for compression (being that elasticity is not enough), and its tail end is a flat construction simultaneously; Make that all the pressure between stress cone and the cable body is not enough; In case the space occurs, can reduce its electrical strength, thereby increase the possibility that punctures cable and annex because of conduction.

Therefore need a kind ofly can guarantee enough electrical strengths, have the GIS terminal of higher insulation and security performance.The problems referred to above at number of patent application are: obtained solution among the 200610063131.X, the utility model improves the vortex phenomenon that its spring produces, and its nylon sleeve is optimized on the basis of above-mentioned patent.

Summary of the invention

In order to solve the problems of the prior art; The utility model provides a kind of cable switch equipment GIS the terminal; It comprises contact, conductor geometrical clamp, grading ring, stress cone, nylon sleeve, spring, shell, and said contact is arranged on the periphery of said conductor geometrical clamp, and said grading ring is arranged between conductor geometrical clamp and the stress cone; The two ends of said spring impose axial compressive force to said nylon sleeve and shell, and said spring is at least three springs that are arranged side by side.

As the further improvement of the utility model, said spring is four to eight springs that evenly are provided with.

As the further improvement of the utility model, said spring is six springs that evenly are provided with.

As the further improvement of the utility model, said stress cone tail end is tapered, coincide with said nylon sleeve and docks.

As the further improvement of the utility model, said nylon sleeve be shaped as short-tail, the length card of the tail end of said nylon sleeve and the end of spring.

As the further improvement of the utility model, also comprise the spring locating piece that is arranged on spring end, the spring locating piece of the length card of the tail end of said nylon sleeve and spring one end.

The beneficial effect of the utility model is: the spring of axial stretching, by whole big spring, make some (as 6) little springs into, and its modulus of elasticity is identical with big spring, can avoid spring to produce vortex phenomenon effectively.The shape of nylon sleeve also made short-tail into by former long-tail, like this in the cost-effective while, can guarantee the stressed more even of nylon jacket, made the interfacial pressure of stress cone and main insulating layer, outer semiconductive layer more reasonable.

[description of drawings]

Fig. 1 is a kind of cable switch equipment of the utility model GIS terminal structure sketch map;

Fig. 2 is the structural representation of the amplification of spring and the nylon sleeve part among Fig. 1.

[embodiment]

Below in conjunction with description of drawings and embodiment the utility model is further specified.

As shown in Figure 1; Wherein crosslinked cable is made up of cable core 1, main insulating layer 6, outer

semiconductive layer

8,13 of metallic sheaths, and the GIS terminal then comprises contact 2, conductor geometrical clamp 3, grading ring 4, stress cone 5, nylon sleeve 7, first sealing ring 9, snap ring 10, spring 11, shell 12, second sealing ring 14, compress volution 15, fastening volution 16, ward off plumbous 17, pyrocondensation protecting pipe 18, fluid sealant 19, ground wire 20.

A kind of cable switch equipment GIS terminal; It comprises contact 2, conductor geometrical clamp 3, grading ring 4, stress cone 5, nylon sleeve 7, spring 11, shell 12; Said contact 2 is arranged on the periphery of said conductor geometrical clamp 3; Said grading ring 4 is arranged between conductor geometrical clamp 3 and the stress cone 5, it is characterized in that: said stress cone 5 tail ends are tapered, coincide with said nylon sleeve 7 and dock; The two ends of said spring 11 impose axial compressive force to said nylon sleeve 7 with shell 12, at least three bar springs of said spring 11 for being arranged side by side.Said spring 11 is four to eight springs that evenly are provided with.Said nylon sleeve 7 be shaped as short-tail, the length card of the tail end of said nylon sleeve 7 and the end of spring 11.Preferably: also comprise the spring locating piece that is arranged on spring 11 ends, the spring locating piece of the length card of the tail end of said nylon sleeve 7 and spring 11 1 ends.

Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection range of the utility model.

Claims

1. cable switch equipment GIS terminal; It comprises contact (2), conductor geometrical clamp (3), grading ring (4), stress cone (5), nylon sleeve (7), spring (11), shell (12); Said contact (2) is arranged on the periphery of said conductor geometrical clamp (3); Said grading ring (4) is arranged between conductor geometrical clamp (3) and the stress cone (5); It is characterized in that: the two ends of said spring (11) impose axial compressive force to said nylon sleeve (7) and shell (12), at least three bar springs of said spring (11) for being arranged side by side.

2. a kind of cable switch equipment GIS according to claim 1 terminal is characterized in that: four to the eight bar springs of said spring (11) for evenly being provided with.

3. a kind of cable switch equipment GIS according to claim 2 terminal is characterized in that: the six bar springs of said spring (11) for evenly being provided with.

4. a kind of cable switch equipment GIS according to claim 3 terminal is characterized in that: also comprise the spring locating piece that is arranged on spring (11) end, the spring locating piece of the tail end card of said nylon sleeve (7) and spring (11) one ends.