CN101521123A

CN101521123A - Medium-voltage switch

Info

Publication number: CN101521123A
Application number: CN200810026522A
Authority: CN
Inventors: 苏伟扬; 康雪涛
Original assignee: LKE (ZHUHAI) CO Ltd
Current assignee: LKE (ZHUHAI) CO Ltd
Priority date: 2008-02-28
Filing date: 2008-02-28
Publication date: 2009-09-02
Anticipated expiration: 2028-02-28
Also published as: CN101521123B

Abstract

The invention discloses a medium-voltage switch, comprising a shell which is sealed with gas; an insulating rotation axis which is used for driving an isolation mechanism to be opened and closed is arranged in the shell; three terminal posts which are fixedly sealed with one another are arranged at the upper part of the shell; three cable access columns are arranged at the lower part of the shell; and a skirt structure is arranged on the inner surface of the shell. The shell is internally provided with the skirt structure which causes the internal creepage distance to be increased, therefore, sufficient electrical clearance and creepage distance are formed on the condition that the volume of the shell is very small, while alternate and earthing short circuit can not be produced, thereby not only reducing the volume of the medium-voltage switch, but also simultaneously achieving very safe and reliable performance.

Description

A kind of Medium voltage switch or circuit breaker

Technical field

The present invention relates to electric switchgear, relate in particular to a kind of Medium voltage switch or circuit breaker.

Background technology

Medium voltage switch or circuit breaker is a kind of as controller for electric consumption, is used to control the power supply in a certain zone, generally by the place of widespread usage to various electricity consumptions, as places such as mansion, factory buildings.Because the voltage of Medium voltage switch or circuit breaker is higher, is easy to generate electric arc, all can cause sizable infringement to user and switch itself, therefore, to avoid alternate and shorted to earth in order to increase inner creepage distance, it is very big that the volume of existing Medium voltage switch or circuit breaker all must be done.There is following shortcoming in existing large volume Medium voltage switch or circuit breaker: the raw material that (1) is expended are many, cause the production cost height; (2) transportation, mobile difficulty; (3) take up room too much, fail to lay down several Medium voltage switch or circuit breakers in the common electric room.

Along with the development of the progress of society, electric power industry, to create and a kind ofly simple in structurely understand, not only reliable, volume but also little Medium voltage switch or circuit breaker are imperative.

Summary of the invention

At the shortcoming of prior art, the purpose of this invention is to provide a kind of Medium voltage switch or circuit breaker, solve the existing bulky problem of Medium voltage switch or circuit breaker.

To achieve these goals, technical scheme of the present invention is: a kind of Medium voltage switch or circuit breaker, it comprises the housing that is sealed with gas, in housing, be provided with the insulation rotating shaft that is used to drive the interrupter folding, be provided with three phase poles on housing top, be provided with three cables in lower housing portion and insert post, be provided with the shirt rim structure at the inner surface of described housing and the outer surface of described insulation rotating shaft.

In described insulation rotating shaft, be embedded with the Merlon skeleton.

The operating head of described insulation rotating shaft adopts the 40cr material of modifier treatment to make, and has six square structures.

Outside each phase pole, be provided with many ring insulating coatings.

Be provided with vacuum interrupter in each phase pole, the electric conductor in this vacuum interrupter and the pole is connected by a sliding contact.

Described sliding contact comprise eight touch the son and eight touch sub-spring, each touches sub-spring and is contained in per two and touches between the son, touching son with eight passes to inside and outside both direction, make the internal circular surfaces of sliding contact and the moved end of vacuum interrupter tightly touch conduction, the electric conductor contact conduction in the outer round surface of sliding contact and the pole mutually.

Link together with a square shaft between the described phase pole and become three-phase integrated pole.

Described cable inserts post and vertically is provided with down.

Described cable inserts post and is horizontally disposed with forward.

Compared with prior art, the invention has the beneficial effects as follows: be provided with the shirt rim structure in the housing of the present invention, make inner creepage distance increase, therefore under the very little situation of the volume of housing, can not produce alternate and shorted to earth, performance reliable purpose as safe as a house again when having realized compressing switch volume on the decrease.

Description of drawings

The present invention is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a stereogram of the present invention; (cable inserts post and is horizontally disposed with forward)

Fig. 2 is a housing schematic diagram of the present invention; (cable inserts post and is horizontally disposed with forward)

Fig. 3 is the axial section of Fig. 2; (cable inserts post and is horizontally disposed with forward)

Fig. 4 is an insulation rotating shaft stereogram of the present invention;

Fig. 5 is the axial section of Fig. 4;

Fig. 6 is many ring insulating coating stereograms of the present invention;

Fig. 7 is the three-phase integrated pole stereogram of the present invention;

Fig. 8 is the axial section of the pole of a band of the present invention vacuum interrupter;

Fig. 9 is the schematic diagram of sliding contact of the present invention;

Figure 10 is the axial section of Fig. 1; (cable inserts post and is horizontally disposed with forward)

Figure 11 is a stereogram of the present invention; (cable inserts post and vertically is provided with down)

Figure 12 is a housing schematic diagram of the present invention; (cable inserts post and vertically is provided with down)

Figure 13 is the axial section of Figure 12; (cable inserts post and vertically is provided with down)

Figure 14 is the axial section of Figure 11.(cable inserts post and vertically is provided with down)

Embodiment

See also Fig. 1, Fig. 2, Fig. 3, Figure 10, Figure 11, Figure 12, Figure 13 and Figure 14, Medium voltage switch or circuit breaker comprises and is sealed with sf ₆The housing 1 of gas, in housing 1, be provided with the insulation rotating shaft 2 that is used to drive the interrupter folding, be provided with three phase poles 3, be provided with three cables in housing 1 bottom and insert post 4 on housing 1 top, inner surface at housing 1 is provided with shirt rim structure 11, and making is having gas sulphur hexafluoride (sf ₆) enclosure interior, the above creepage distance of 140mm between phase and phase, is relatively arranged.Cable inserts post 4 and is horizontally disposed with forward, and its advantage is that cable inserts conveniently, saves the space; Also can select vertically to be provided with down.

See also Fig. 4 and Fig. 5, the insulation rotating shaft 2 by skeleton 21, main shaft 22, operating head 23 and bolster 25 are formed, and this insulation rotating shaft surface design has shirt rim 26, and purpose is to increase creepage distance, in the sf6 gas that makes at 27-30kpa, the above creepage distance of 140mm is arranged along insulation rotating shaft surface; In order to reduce the volume of insulation rotating shaft, and can reach mechanical strength and life-span again, when insulation rotation axis hole is epoxy resin fully to the limit, under the situation of insufficient strength, employing with skeleton be embedded in the insulation rotating shaft main shaft in to gain in strength, skeleton adopts the Merlon of good mechanical property simultaneously, and is not only tough but also firm, further increased the intensity of this insulation rotating shaft; Operating head adopts 40 chromium (40c of modifier treatment _r) six square metal structure, the torque of interrupter 26.7N:M is all assigned on six faces, thereby reduced the holding capacity of each face, because above design is arranged, so that the insulation rotating shaft can design is very little.

See also Fig. 1, Fig. 2, Figure 11, Figure 12 and Fig. 6, outside each phase pole 3, be provided with many ring insulating coatings 31, many ring insulating coatings 31 adopt multiring structure, increase creepage distance, thereby in one group of cabinet, there is insulating coating just can effectively be increased to enough creepage distances, with isolated air distance between phase and phase, make over the ground, alternate enough creepage distances and air distance arranged all, distance between the pole can be provided with to such an extent that more can not produce electric arc, so further dwindled the overall volume of Medium voltage switch or circuit breaker.

See also Fig. 7, Fig. 8, Fig. 9 figure, 10 and Figure 14 in Medium voltage switch or circuit breaker, press the function of isolating on-load switch and vacuum circuit-breaker in can also having simultaneously, can bear bigger voltage, the vacuum circuit-breaker concrete structure is to be provided with vacuum interrupter 32 in each phase pole 3, and the electric conductor 33 in this vacuum interrupter 32 and the pole is connected by a sliding contact 34.Sliding contact 34 comprise eight touch the son 341 and eight touch sub-spring 342, each touches sub-spring and is contained in per two and touches between the son, touching son with eight passes to inside and outside both direction, make the internal circular surfaces 343 of sliding contact tightly touch conduction with the moved end of vacuum interrupter, the outer round surface 344 of sliding contact conducts electricity with the electric conductor contact in the pole mutually; This sliding contact is simple in structure, reliable in function.Each pole in the three-phase middle links together with a square shaft 36, makes in a secondary mould, and three poles are become one because the three-phase vacuum interrupter is sealed in three-phase integrated pole fully, so can do very little.

Though the present invention discloses as above with preferred embodiment, is not in order to limit scope of the invention process.Any those of ordinary skill in the art, promptly every when doing a little improvement in not breaking away from invention scope of the present invention according to the equal improvement that the present invention did, should be invention scope of the present invention and contain.

Claims

1, a kind of Medium voltage switch or circuit breaker, it comprises the housing that is sealed with gas, in housing, be provided with the insulation rotating shaft that is used to drive the interrupter folding, be provided with three phase poles on housing top, be provided with three cables in lower housing portion and insert post, it is characterized in that, be provided with the shirt rim structure at the inner surface of described housing and the outer surface of described insulation rotating shaft.

2, Medium voltage switch or circuit breaker as claimed in claim 1 is characterised in that, is embedded with the Merlon skeleton in described insulation rotating shaft.

3, Medium voltage switch or circuit breaker as claimed in claim 1 is characterised in that, the operating head of described insulation rotating shaft adopts 40 chromium materials of modifier treatment to make, and has six square structures.

4, Medium voltage switch or circuit breaker as claimed in claim 1 is characterised in that, is provided with many ring insulating coatings outside each phase pole.

5, Medium voltage switch or circuit breaker as claimed in claim 1 is characterised in that, is provided with vacuum interrupter in each phase pole, and the electric conductor in this vacuum interrupter and the pole is connected by a sliding contact.

6, Medium voltage switch or circuit breaker as claimed in claim 5, be characterised in that, described sliding contact comprise eight touch the son and eight touch sub-spring, each touches sub-spring and is contained in per two and touches between the son, touching son with eight passes to inside and outside both direction, make the internal circular surfaces of sliding contact and the moved end of vacuum interrupter tightly touch conduction, the electric conductor contact conduction in the outer round surface of sliding contact and the pole mutually.

7, Medium voltage switch or circuit breaker as claimed in claim 5 is characterised in that, linking together with a square shaft between the described phase pole becomes three-phase integrated pole.

As the described Medium voltage switch or circuit breaker of the arbitrary claim of claim 1 to 7, be characterised in that 8, described cable inserts post and vertically is provided with down.

As the described Medium voltage switch or circuit breaker of the arbitrary claim of claim 1 to 7, be characterised in that 9, described cable inserts post and is horizontally disposed with forward.