CN103155079A

CN103155079A - Vacuum interrupter chamber

Info

Publication number: CN103155079A
Application number: CN2011800467494A
Authority: CN
Inventors: L-R.杰尼克
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2010-07-30
Filing date: 2011-07-19
Publication date: 2013-06-12
Also published as: WO2012013547A1; DE102010033259A1; EP2599098A1

Abstract

A vacuum interrupter chamber has an encapsulation housing (1) having a first and a second switching contact piece (9, 13). The two switching contact pieces (9, 13) can be moved relative to one another so as to form a switching section. At least one of the switching contact pieces (9, 13) is surrounded by a cavity (5, 6) of the encapsulation housing (1). A mouth opening (7) in the cavity (5, 6) is provided with a supporting element (10, 10a). The supporting element (10, 10a) closes the mouth opening (7) such that it passes through a switching contact piece (9, 13).

Description

Vacuum interrupter chamber

Technical field

The present invention relates to a kind of with encapsulating housing and with the vacuum interrupter chamber of the first and second switch contacts, described switch contact can move relative to each other and form switch over travel, and at least one switch contact that the cavity of the packed housing in described switch contact surrounds passes this encapsulating housing airtightly.

Background technology

This type of vacuum interrupter chamber is for example known from open source literature DE19906156A1.This type of vacuum interrupter chamber has encapsulating housing and the first and second switch contacts.Two switch contacts can move relative to each other.At this, the encapsulating housing that two switch contacts run through vacuum interrupter chamber airtightly stretches out.In known vacuum interrupter chamber, the cavity that can be directed moving through the packed housing of switch contact of encapsulating housing surrounds.Provide the space in cavity, so that crank driving mechanism is connected on the switch contact.Known crank driving mechanism has connecting rod, the deflection due to the rotation of crank of described connecting rod.Realize in the hollow cylinder zone of encapsulating housing for the maintenance of the switch contact that passes airtightly encapsulating housing and guiding.In this hollow cylinder zone, should realize the sealing of switch contact and encapsulating housing on the one hand, and should guarantee on the other hand the guiding of switch contact.

In vacuum interrupter chamber, for the air-tightness of encapsulating housing, high request has been proposed.For realizing high useful life, should avoid the mechanical load of seal.Especially, in the situation that the switch contact of supporting movingly, undesirable load of the seal that causes due to motion may appear.Undesirable load may reduce the useful life of seal.

Summary of the invention

Therefore, technical problem to be solved by this invention is to provide a kind of vacuum interrupter chamber of sealing as far as possible enduringly that guarantees between switch contact and encapsulating housing.

According to the present invention, this technical problem solves by the supporting member of layout in the zone of the chamber of described cavity mouth opening for the switch contact in the vacuum interrupter chamber of aforementioned type.

The bag-shaped cavity of cavity in the envelope contour that has formed on encapsulating housing in packed housings close.Described cavity has dwindled the space at the encapsulating housing inner sealing.Described cavity at this opening therefore in the wall of encapsulating housing and provide the switch contact is introduced in the possibility of the inside of encapsulating housing by encapsulating housing in the zone of cavity.The contact portion that has two switch contacts in encapsulating housing inside.Formed switch over travel between the contact portion of two switch contacts.The switch contact passes encapsulating housing airtightly at this, makes the switch contact can electrically contact outside encapsulating housing.The space of the vacuum interrupter chamber of encapsulating housing inner sealing is evacuated, and makes this place have pure as far as possible vacuum.The contact portion of switch contact is arranged in this space.

Described cavity protrudes in encapsulating housing bag-shapedly.Advantageously, encapsulating housing can symmetrically form with respect to longitudinal axis, and wherein cavity preferably is arranged in distolateral upper and opening in distolateral.Preferably, cavity can form with longitudinal axis coaxial.The cavity opening is in the wall of encapsulating housing.For example, wall can be have circular periphery distolateral, and its lumen mouth opening is positioned at the center of distolateral wall.The switch contact should be in cavity be preferably realized in the cavity end (bottom) that deviates from cavity chamber mouth opening running through of encapsulating housing.Therefore, for example can make the switch contact be incorporated in cavity by chamber mouth opening, and enter into airtightly on the end that deviates from chamber mouth opening in the inside of encapsulating housing.The end that deviates from the cavity of chamber mouth opening can be configured to the bottom, and described bottom separates by side face and the chamber mouth opening of cavity.If use now supporting member with the regional internal support switch contact at the chamber of cavity mouth opening, guiding and location for the switch contact are provided on the opposed end of the cavity that preferably extends along longitudinal axis.Therefore, be guided through with the switch contact other supporting and the guiding that the switch contact is provided on the zone (chamber mouth opening) that the zone (cavity bottom) of encapsulating housing deviates from mutually.The switch contact is supported, and only makes and has realized that with limited degree the switch contact is with respect to the upset of encapsulating housing, crooked or swing.With this, on the one hand, the switch contact is remained on the airtight of encapsulating housing run through the regional interior of section (bottom) and also at this place, the switch contact sealed airtightly; On the other hand, this switch contact also is supported in the zone of chamber mouth opening of cavity.

As supporting member, suitable is such as carrying bolt, support ring etc., but they can be with the structures of angular stiffness but also can use with the structure of Finite elastic deformation.Supporting member can be configured to the supporting member that also can be configured to conduct electricity of electric insulation.Supporting member can be configured to single-piece or many s' supporting member.

Favourable structure in addition can be stipulated, makes supporting member to be run through the mode enclosed cavity mouth opening of joint by the switch contact.

Can be with the chamber mouth closure of openings of cavity by supporting member, thus prevent that foreign matter from invading in cavity.The running through of supporting member be bonded on this and should be configured to the bubble-tight as far as possible joint that runs through.According to the requirement of the seal degree of the sealing of chamber mouth opening, seal can have different structures.Therefore, for example can provide and prevent fluid or dustproof sealing effectiveness.Alternatively, also can use and only prevent that thick particulate from invading the seal in cavity.

In addition, can advantageously advise making the switch contact to move with respect to supporting member, or/and make supporting member to move with respect to cavity.The movable supporting of switch contact on supporting member realized making cavity also to be used for introducing with respect to the movable switch contact of encapsulating housing.By the movable layout of switch contact, realized outside encapsulating housing as the switch contact applies actuation movement, and this actuation movement has been delivered in encapsulating housing inside.In the situation that the sliding bearing on supporting member has realized providing friction sealed in simple mode on supporting member, when moving with respect to supporting member or with respect to encapsulating housing, the switch contact also has sealing effectiveness even make.Also can will locate with respect to the switch contact that the encapsulating housing position is fixedly arranged by means of cavity by structure according to the present invention.In this case, for example the thermal expansion between switch contact and encapsulating housing can be compensated in movable supporting.

But also can advise connecting with the corresponding switch contact that sets with making the supporting member angular stiffness.In this case, supporting member can be movingly by being placed on the cavity that correspondence sets.In addition, supporting member is with respect to the switch contact and be movable with respect to cavity.The floating support of supporting member is provided in this case.If realize sealing effectiveness on supporting member, use to allow seal motion or that sealed the angular stiffness connection.

Favourable structure in addition can be to make cavity to have the effect of electric insulation or conduction.

Cavity can for example be configured to tubular, and wherein pipe is made by the material of electric insulation.Realize making the cavity can be bag-shapedly to inner projection, in the zone of the switch over travel between as close as possible two switch contacts with this.Due to the electric insulation feature, electromotive force does not move because of the envelope contour of the encapsulating housing of vacuum interrupter chamber.Advantageously, cavity can for example be formed by electrical insulating material.At this, can use for example pottery or plastics.Advantageously make the cavity distolateral effect with electric insulation of opening within it.Cavity and distolaterally can for example be configured as in this case the insulator of one.By the cavity of electric insulation, but pass the switch contact electrically insulated from one another of encapsulating housing.If use the cavity of conduction, at the barrier that electric insulation upwards should be provided of walking of encapsulating housing, with switch contact mutually insulated on encapsulating housing.Therefore, can for example advise making the distolateral electric conducting material by for example metal of encapsulating housing to make, wherein form cavity from distolateral at least one.In this case, can for example insert the insulation barrier that for example has the ceramic ring form in the side face of encapsulating housing.The electromotive force of switch contact can be separated from each other by insulation barrier.Alternatively, also can advise the effect that makes at least one cavity have conduction when using a plurality of cavity, and at least one cavity has the effect of electric insulation.

In addition, can advantageously advise, make the switch contact form rotational symmetric, and cavity and contact are extended coaxially.

The rotational symmetric form of contact is favourable, because its motion is carried out along its rotation.In this case, contact makes switch over travel be arranged in the mutual between the right contact portion of end side surface of switch contact mutually with distolateral opposed.If use the cavity with switch contact coaxial arrangement, the side face of switch contact is surrounded by cavity, wherein distolateral (bottom) of cavity passed with being touched the part Fluid Sealing, and another distolateral interior chamber mouth opening of wall that forms the encapsulating housing that is in vacuum interrupter chamber of cavity.

That favourable structure in addition can be to make the switch contact to have to extend along rotation, with the bar of the contact portion of radially widening of distolateral upper connection, its king-rod half length that surpasses on the rotation direction being surrounded by cavity.

With bar be connected that the longitudinal extension structure of switch contact of contact portion of connection is suitable for passing encapsulating housing in cavity and at the chamber of encapsulating housing mouth opening part by means of supporting member stabilization package housing.

The contact portion of contact is arranged in encapsulating housing inside.The bar of contact passes respectively encapsulating housing airtightly.Correspondingly, bar extends through the trend of cavity.Bar is compared with its cross section has obviously longer extending axially, its king-rod mutually away from point (bottom and chamber mouth opening) locate to be supported by cavity.On an end of cavity, be introduced in the inside of encapsulating housing the bar Fluid Sealing, and also correspondingly sealed herein.Arranged supporting member on the other end of cavity.With this, can realize the simple location of bar on encapsulating housing of contact.Therefore, the upset of switch contact or the crooked difficulty that becomes.Therefore, the seal of Fluid Sealing is protected on encapsulating housing is not subjected to other mechanical load.

Advantageously can advise in addition adjustable length potted component is arranged between cavity and switch contact hermetically.

By using adjustable length potted component, the switch contact can be incorporated in the inside of encapsulating housing movingly with respect to encapsulating housing.Adjustable length potted component can for example surround cavity and Fluid Sealing ground by being placed on cavity.Adjustable length potted component has formed switch contact in protruding into cavity and the transition of the Fluid Sealing between cavity.Adjustable length potted component is connected the cavity of encapsulating housing with movable switch contact.As adjustable length potted component, for example can be provided with the so-called bellows that allows reversible deformation on the distolateral end of cavity.Adjustable length potted component works as the seal between the cavity of switch contact and encapsulating housing.

Favourable structure in addition can be to make adjustable length potted component be extended until cavity and can surrounding with respect to the protective cover of cavity motion.

Can use protective cover to carry out the scene impact in encapsulating housing inside.Protective cover can for example be bearing on the switch contact.Preferably, protective cover can be connected with contact in the zone of distolateral contact portion of radially widening, and makes protective cover extend around adjustable length potted component.Protective cover in this extension until cavity and surround cavity.When the length of adjustable length potted component changed, protective cover can be pulled on cavity.Adjustable length potted component is arranged in the annular gap that is defined between switch contact and protective cover.The annular gap limits at distolateral cavity by protruding in protective cover.

Protective cover should conduct the electromotive force with switch contact that protective cover is located.

Favourable structure in addition can be to make two switch contacts to pass encapsulating housing in the mode of being surrounded by each cavity.

Formed switch over travel between the first and second switch contacts.If use now the cavity of encapsulating housing the switch contact is incorporated in the inside of encapsulating housing on two switch contacts, two switch contacts are stabilized on each chamber mouth opening of each cavity by each supporting member.Therefore, the encapsulating housing that can provide structure relatively to grow, described encapsulating housing provides the corresponding striking distance along its outer surface, with voltage mutually insulated that also reliably will be higher outside encapsulating housing under the vacuum interrupter chamber off-state.Therefore, the resistance to pressure that vacuumizes the vacuum interrupter chamber of outside, space can improve.The possibility of the switch contact of the stock shape that the vacuum switch that therefore, provides use to protrude into slim-lined construction is indoor.In the chamber mouth opening that correspondingly the switch contact is bearing in cavity, can avoid the switch contact to depart from from its coaxial position.Especially, in the situation of the horizontal layout of vacuum interrupter chamber, therefore can resist the upset that the gravity of switch contact causes.In addition, by providing to the inner corresponding cavity that stretches into of the envelope contour of encapsulating housing bag-shapedly, the encapsulated space that is set to vacuum in the vacuum switch chamber interior is reduced.Can reduce for vacuum interrupter chamber being vacuumized the required time because encapsulating housing externally size remain unchanged or situation about increasing under have spatial volume reduction or that remain unchanged.

Description of drawings

As follows, schematically illustrated and be described in more detail below embodiments of the invention in the accompanying drawings.At this, accompanying drawing is:

Cross section by vacuum interrupter chamber has been shown in Fig. 1.

Embodiment

Fig. 1 has illustrated vacuum interrupter chamber in cross section.Vacuum interrupter chamber has encapsulating housing 1.Encapsulating housing 1 has and is substantially shaped as with respect to longitudinal axis 2 Rotational Symmetries.At outer circumferential side, encapsulating housing 1 has cylindrical side face basically, and the mid portion of radially widening wherein is provided.The side face of encapsulating housing 1 can be such as being made by electric conducting material (such as copper coin etc.).But also can advise making the mid portion of only radially widening be configured to metallic walls, wherein at the side face of the distolateral extension of the mid portion two side direction encapsulating housings 1 of radially widening such as being formed by electrical insulating material (as pottery etc.).But provide the outer circumferential side structure of the encapsulating housing 1 of being made by electric conducting material at this in Fig. 1.Encapsulating housing 1 has first distolateral 3 and second distolateral 4.Arrange perpendicular to longitudinal axis 2 for two distolateral 3,4.Two distolateral 3,4 of encapsulating housing 1 are sealed by electrical insulator.Electric insulation distolateral 3,4 between, the electromotive force that the conduction of the side face of conduction is floated.

The electric insulation wall has sealed each

end

3,4 of encapsulating housing 1.Be respectively equipped with the first cavity 5 and the second cavity 6 in the electric insulation wall.Two cavitys 5,6 have same class formation basically.The structure of the first cavity 5 on first distolateral 3 for example, is at first described.The first cavity 5 has the form with the hollow cylinder of circular cross section.The first cavity 5 is directed coaxially with longitudinal axis 2, makes the first distolateral 3 structure with annular, wherein has the chamber mouth opening 7 of the first cavity 5 in first distolateral 3 at the center.The first cavity 5 has bottom 8 on it deviates from the end of chamber mouth opening 7.The first cavity 5 and first distolateral 3 wall are made by electrical insulating material.The first switch contact 9 is projected in the first cavity 5.The first switch contact 9 can move and have bar 9a and at the distolateral contact portion 9b that radially widens that is connected on bar 9a along longitudinal axis 2.The first switch contact 9 passes the bottom 8 of the first cavity 5 with its bar 9a.The first switch contact 9 mechanically supports and guides (being on bottom 8 at this) on cavity 5.Arranged supporting member 10 in the zone of the chamber of the first cavity 5 mouth opening 7.Supporting member 10 is configured to annular and sealing basically, and makes the bar 9a of the first switch contact 9 pass through chamber mouth opening 7.With this, prevented that foreign matter from invading in the first cavity 5.The bar 9a of the first switch contact 9 passes supporting member 10 slidably.Supporting member 10 forms annulus at this, and described annulus is inserted in the chamber mouth opening 7 of the first cavity 5 with flushing.With this, realized the relative motion of the first contact 9 with respect to encapsulating housing 1.The first contact 9 is removable on the direction of longitudinal axis 2.For guiding hermetically the first switch contact 9 by the first cavity 5, arranged bellows 11 on the bottom 8 of the first cavity 5.Bellows 11 is adjustable length elements.Bellows 11 has surrounded the pass through openings of the first switch contact 9 on the bottom 8 of the first cavity 5.Bellows 11 Fluid Sealing ground are connected with the bottom 8 of the first cavity 5, and have surrounded the first switch contact 9.In addition, bellows 11 is connected and has surrounded hermetically the first switch contact 9 at all side liquids with the bar 9a of the first switch contact 9.Produced sealing between the first cavity 5 of the first switch contact 9 and encapsulating housing 1 with this.The first switch contact 9 passes encapsulating housing 1 in the zone of the first cavity 5.The first cavity 5 has surrounded the first switch contact 9 in all sides.At this, be the surpassing half and surrounded by the first cavity 5 in all sides of bar 9a that makes the first switch contact 9 with the scale selection of the first cavity 5.

The protected cover 12 of bellows 11 surrounds.Protective cover 12 is fixed on the first switch contact 9 and in all sides and has surrounded bellows 11, makes bellows 11 be arranged in the built-in bar 9a of the first switch contact 9 and surround between the protective cover 12 of bellows 11.Bellows 11 is for example electromotive force conduction and that conduct its switch contact 9 that carries.Protective cover 12 is also electromotive force conduction and that also conduct its switch contact 9 that carries.Therefore, have the annular gap between switch contact 9 and protective cover 12, described annular gap holds bellows and without electric field.Bellows 11 is arranged by dielectric barrier ground.At this, protective cover 12 is basically symmetrically directed with respect to longitudinal axis 2, and surpasses on the one hand bellows 11 and extend in the zone of the first cavity 5 on the direction of rotation 2.Protective cover 12 is servo-actuated and be pulled on the first cavity 5 when the first switch contact 9 motion.

For connecting the motion of the first switch contact 9, can provide actuating force on the bar 9a of the first switch contact 9 in encapsulating housing 1 outside.

The wall of electric insulation also is provided on second distolateral 4, and described electric insulation wall has sealed second distolateral 4 of encapsulating housing 1.At this, on second distolateral 4 in provide in the heart mouth opening 7, the second cavitys 6 in chamber to be connected on described chamber mouth opening 7.The second cavity 6 also as the first cavity 5 have hollow cylindrical structure with circular cross section, described structure and longitudinal axis 2 point to coaxially.The second cavity 6 also has bottom 8, and wherein second switch contact 13 has passed encapsulating housing 1 in the zone of bottom 8.Second switch contact 13 also symmetrically forms and is arranged in coaxially on encapsulating housing 1 with longitudinal axis 2 as the first switch contact 9.The contact portion 13b that radially widens that second switch contact 13 has bar 13a and connects on bar 13a.On the bottom 8 of the second cavity 6, second switch contact 13 passes the wall of encapsulating housing 1 with its bar 13a.Second switch contact 13 is connected with the second cavity 6 hermetically with its bar 13a fluid on the bottom 8 of the second cavity 6.The part 13b that radially widens is in the inside of encapsulating housing 1, and opposed distolateral with the contact portion 9b that radially widens of the first switch contact 9.Formed switch over travel between the first and

second switch contacts

9,13 two the contact portion 9b that radially widen, 13b.Switch over travel is surrounded and is through by vacuum.Second switch contact 13 supports regularly with respect to encapsulating housing 1 position.When moving with respect to encapsulating housing 1 at the first switch contact 9 and also moving with respect to second switch contact 13, open or close switch over travel.Switch over travel is in the zone of radially widening of mid portion of side face of encapsulating housing 1.

Arranged other supporting member 10a in the zone of the chamber of the second cavity 6 mouth opening 7, described supporting member 10a forms structurally identical with the supporting member 10 of first distolateral 3 chamber mouth opening 7 at this.At other supporting member 10a upper support the bar 13a of second switch contact 13, wherein other supporting member 10a is closed because second switch contact 13 passes at second distolateral 4 chamber mouth opening 7.At this, can provide the connection of the angular stiffness between second switch contact 13 and other supporting member 10a, because do not realize the switch motion on second switch contact 13.

Two cavitys 5,6 protrude in encapsulating housing 1 bag-shapedly, and pass the envelope contour of encapsulating housing 1.Thus, the space that provides its volume to be vacuumized to reduce in envelope contour inside, wherein two

switch contacts

9,13 by cavity 5,6 electric insulations be guided to distolateral 3,4 of encapsulating housing 1.In encapsulating housing 1 outside, two

switch contacts

9,13 can be included in current path.This current path can open and close by two switch contacts 9, two contact portion 9b that radially widen of 13, the switch over travel between 13b.Two distolateral walls of 3,4 and two cavitys 5,6 materials by electric insulation form.Correspondingly can make two distolateral 3,4 and mutually locate by the perimembranous of conduction on all sides.

Claims

1. vacuum interrupter chamber, this vacuum interrupter chamber is with encapsulating housing (1) and with the first and second switch contacts (9,13), described two switch contacts (9,13) can move relative to each other and form switch over travel, and the cavity (5,6) of at least one the packed housing (1) in described switch contact (9,13) passes encapsulating housing (1) with surrounding airtightly, it is characterized in that, arranged the supporting member that is used for switch contact (9,13) (10,10a) in the zone of the chamber mouth opening (7) of cavity (5,6).

2. vacuum interrupter chamber according to claim 1, is characterized in that, supporting member (10,10a) is to be run through the mode enclosed cavity mouth opening (7) of joint by switch contact (9,13).

3. vacuum interrupter chamber according to claim 1 and 2, is characterized in that, switch contact (9,13) can be with respect to supporting member (10,10a) motion, perhaps/and supporting member (10,10a) can move with respect to cavity (5,6).

4. the described vacuum interrupter chamber of any one according to claim 1 to 3, is characterized in that, cavity (5,6) has the effect of conduction or electric insulation.

5. the described vacuum interrupter chamber of any one according to claim 1 to 4, is characterized in that, switch contact (9,13) symmetrically forms, and cavity (5,6) extends coaxially with contact.

6. vacuum interrupter chamber according to claim 5, it is characterized in that, switch contact (9,13) has the bar (9a, 13a) that extends along rotation, be connected with the contact portion (9b, 19b) of radially widening on described rod end side, the surpassing half and surrounded by cavity (5,6) of the length of its king-rod (9a, 9b) on the direction of rotation.

7. the described vacuum interrupter chamber of any one according to claim 1 to 6, is characterized in that, adjustable length potted component (11) is arranged between cavity (5,6) and switch contact (9,13) hermetically.

8. vacuum interrupter chamber according to claim 7, is characterized in that, the protected cover of adjustable length potted component (11) (12) surrounds, and described protective cover (12) extends until cavity (5,6) and can moving with respect to described cavity (5,6).

9. according to claim 1 or 8 described vacuum interrupter chambers, is characterized in that, two switch contacts (9,13) are passed encapsulating housing by the mode that a cavity (5,6) surrounds with each.