CN102959816A

CN102959816A - Bushing for an electrical apparatus in a metal casing and assembly for a ground isolator with improved mechanical retention

Info

Publication number: CN102959816A
Application number: CN2011800324861A
Authority: CN
Inventors: 卢卡斯·特赖尔
Original assignee: Alstom Technology AG
Current assignee: General Electric Technology GmbH
Priority date: 2010-04-28
Filing date: 2011-04-28
Publication date: 2013-03-06
Anticipated expiration: 2031-04-28
Also published as: FR2959587B1; CN102959816B; WO2011135037A1; FR2959587A1; CH705209B1

Abstract

Assembly for a ground isolator comprising a fixed contact (18) fixedly mounted in a bore (16) of a cap (6.2), the fixed contact (18) having a body of longitudinal axis (Y), a first longitudinal portion of which projects from the support and is connected to ground, the connection region between the first and second portions having a radial projection (26) comprising a first annular face (26.1) and a second annular face (26.2) that are inclined in relation to the longitudinal axis (Y). Electrical insulating means, for example in the form of two sleeves (38, 40), are mounted in the bore (16). The internal surface (42, 44) of the sleeves (38, 40) is shaped so as to bear flat against the first (26.1) and second (26.2) inclined faces, respectively, of the radial projection (26). A clamping plate (50) mounted on the cap (6.2) keeps the fixed contact (18) immobilized in the bore (16) via the sleeves (38, 40).

Description

The sleeve pipe and being used for that is used for the electric equipment of metal shell has the assembly of isolator of the mechanical fixing of improvement

Technical field

The application relates generally to a kind of sleeve pipe (bushing) for-high voltage gas-insulated switchgear, and relates in particular to a kind of assembly that is used for earthed switch that has the threephase switch equipment of single housing and use in described switchgear.

Background technology

Gas-insulated switchgear generally is provided with for the earthed switch with conductor ground connection in the metal casing inboard, to guarantee the safety of safeguarding operating personnel between detection period of switchgear each several part.

For example, by file WO 2007/042548 known such switch.

Described switch comprises the fixing grounding contact of the housing that passes switchgear, the end that is in the grounding contact of hull outside links to each other with ground, and the end that is in the housing inboard by with the removable contact on ground as the so-called phase contact that is electrically connected with the conductibility rod.

Fixed contact must pass housing in the mode that prevents the dielectric gas leakage under the pressure that contains in the housing inboard and install; In addition, fixing grounding contact and housing is electric insulation.

But when removable contact moved and penetrate into the phase contact, this contact was subject to mechanical force.

If the mechanical fixing of grounding contact is not enough, at first described power can weaken fixing grounding contact and the sealing between the housing, and secondly the guiding quality of removable contact can be bad, and this can cause removable contact too early with damage, and the degeneration of contact.

In file WO 2007/042548, fixing grounding contact passes housing by the electric insulation sleeve and installs, and provides the plate bolt system in order to make fixing grounding contact maintenance.

This installation is very complicated, and has applied considerable machinery and dielectric stress at sleeve.

It is the fixed contact that the wall section of electric insulation installs by case with respect to described case that file FR 1 413 462 has described a kind of.This is installed needs a large amount of parts.

Therefore, the application's purpose is to provide the earthed switch assembly that has airtight installation and guarantee the good mechanical fixing on housing, and the sleeve pipe of gas-insulated switchgear that more generally is provided for having the mechanical fixing on housing of the installation sealing of improvement and improvement.

Summary of the invention

The application's above-mentioned target is realized by the sleeve pipe that is used for gas-insulated switchgear, more specifically realized by the earthed switch assembly with fixed contact, described fixed contact is fixedly mounted in the hole of support portion, and comprise the elongated main body with longitudinal axis, described main body has the vertical first that for example is electrically connected with ground of being designed to from described support portion projection, and be designed to be contained in vertical second portion in the housing of described switchgear, bonding pad between first and the second portion comprises radial projection, and described radial projection comprises the first anchor ring and the second anchor ring with respect to described longitudinal axis inclination.

For example the electric insulation arrangement of two form of sleeve is installed in the described hole, in order to make the fixed contact insulation of described support portion.

The inner surface of described sleeve is configured as will be with the first inclined plane and second inclined plane of the described radial projection of correspondingly breasting of planar fashion (bearagainst).The grip block that is installed on the described support portion makes the appropriate location of described fixed contact maintenance in described hole by described sleeve.

By described inclination of described radial projection, the vertical chucking power that is applied by described grip block is divided into axial component and radial component, thus guarantee described fixed contact in described support portion in radial and axial all good maintenances.

The rigidity of the mechanical fixing of described fixed contact in described housing is increased, this has at first been avoided the sealing between described housing and the described fixed contact to suffer stress, and next has been guaranteed being hinged to the extraordinary guiding of the removable contact on the described fixed contact.

Installation elements number simple in structure seldom.Thereby simplified installation.

The sleeve that is preferably placed at described hull outside is adjacent with the first of described fixed contact on the certain-length of the outside, described support portion, and described length can be adjusted, in order to change the resistance to pressure (withstand voltage) of described switchgear.

Like this, the application's theme is a kind of sleeve pipe of gas-insulated switchgear, described switchgear is filled with the dielectric gas of pressurized and comprises the conductor element that is installed in the support portion, described support portion forms the part of the housing of described switchgear, described support portion comprises through hole, described conductor element is installed in the described through hole, described conductor element comprises the elongated main body that is provided with radial projection on the side with longitudinal axis, described projection is at first limited by the first anchor ring that tilts with respect to described longitudinal axis in the vertical, and secondly limited by the second anchor ring that tilts with respect to described longitudinal axis, described two faces tilt in opposite direction, electric insulation arrangement is installed in the described hole, and at least between a shoulder and described conductor element in described hole, described device comprises with the first inclination anchor ring of the described radial projection of mode breasting of face and the inclined plane of the second inclination anchor ring, and grip block is installed on the described support portion, and the described electric insulation arrangement of breasting, in order to apply chucking power at the described electric insulation arrangement of the described shoulder in the described hole of breasting.

Described electric insulation arrangement can comprise the first sleeve and the second sleeve, described the first sleeve is made by the electrical insulating material of the first that centers on described fixed contact, be installed between the described shoulder and described radial projection of described through hole, and be provided with inclined-plane with the first inclination plane-plane contact of described radial projection, described the second sleeve is made by the electrical insulating material of the second portion of surrounding said conductor element, be installed between described grip block and the described radial projection, and be provided with inclined-plane with the second inclination plane-plane contact of described radial projection.

Advantageously, described the second sleeve comprises the larger-diameter part of carrying described inclined-plane and passes and exceed the small diameter portion adjacent with second portion described fixed contact described grip block.

Advantageously, the first sleeve also comprises the vent passages that passes described the first sleeve, so that gas circulates between two longitudinal surfaces of the first sleeve.

Advantageously, described inclined plane present with respect to described longitudinal axis in 30 ° to 60 ° scope, and more advantageously equal 45 ° inclination angle.One of described the inclination angle that can have greatly to 90 °.

Contact between described the second sleeve and the described conductor element can prevent that dielectric gas from leaking, and the contact preventing dielectric gas between described the second sleeve and the described through hole leaks.

For this reason, O shape is enclosed in the groove that is installed in the side surface that is made in described conductor element, and contact with the hole of described the second sleeve, and/or O shape circle is installed in the groove in the side surface that is made in described the second sleeve, and contacts with the described through hole of described support portion.

For example, described grip block is by directly being fastened on screw fastening in the described support portion to described support portion.Advantageously, the face that contacts with described the second sleeve of described grip block comprises recess, and described recess holds the part from the hole projection of described support portion of described the second sleeve.

The end of described conductor element that is designed to be in the hull outside of described switchgear comprises the par and passes the hole of described par, is used for installing pitman.

Another theme of the application also is the earthed switch assembly, comprise that at least one is according to the application's sleeve pipe, described conductor element is fixed contact, and switch comprises at least one with respect to the removable contact that described fixed contact is slidingly installed, and described removable contact is designed to make described fixed contact and phase contact on the Ampereconductors that is connected to described switchgear to electrically contact.

Another theme of the application also is a kind of earthed switch assembly for threephase switch equipment, comprises three the application's assembly.

Can be substantially coplanar in three pars that described fixed contact forms, in order to earth rod can be fastened on it.

Advantageously, described support portion is included in two protuberances on its lateral surface, and each described protuberance and is provided with for the hole that earth rod is fastened in the described cap section between two fixed contact ends.

The upper end of described protuberance and the axial edge of described par and substantially coplanar from the longitudinal end of described second sleeve of the outside projection of described cap section.

Another theme of the application also be a kind of airtight metallic packaging that is filled with the pressurized dielectric gas in-high-voltage switch equipment, comprise metal shell, the assembly that at least one is connected to the electric conductor on the phase contact and is installed at least one the application on the described housing with air-tight manner.

For instance, described housing presents the overall shape (general shape) of tubulose, and the described cap section side direction of described assembly is installed on the described housing.

Another theme of the application also be a kind of in-high voltage threephase switch equipment, comprise three electric conductors, each described electric conductor is connected to phase contact and the application's assembly.

For instance, described switchgear comprises by screw-nut system and is fastened to earth rod on the end of described fixed contact.

Described earth rod can be by twisting screw fastening in the hole be affixed to described protuberance to described cap section.

Description of drawings

Can understand better the application by following explanation and accompanying drawing, wherein:

Fig. 1 is the longitudinal cross-section view of a part of the application's earthed switch assembly;

Fig. 2 is the perspective view in the outside that comprises a threephase switch equipment of three Fig. 1 earthed switch assemblies;

Fig. 3 is the perspective schematic view of example of the switchgear that can use the application; And

Fig. 4 is the cross sectional view of embodiment of the application's earthed switch.

Embodiment

The application relates to single-phase earthing switch and three-phase ground switch.

In the example that illustrates, the element of fixing grounding contact and formation earthed switch assembly is revolving body.This has simplified manufacturing and the installation of element.

Fig. 1 illustrates the part that the earthed switch assembly 4 (Fig. 4) in the application of the application's switchgear 2 is located with the cross section.

Fig. 2 illustrates the part of the application's who is observed by the outside threephase switch equipment, and described switchgear comprises three the application's assembly E1, E2 and E3.

Fig. 3 schematically shows the example of the threephase switch equipment that can use the application.

Switchgear 2 comprises dielectric gas (dielectric gas) the airtight housing 6 of sulphur hexafluoride (sF6) for example that is filled with pressurized.

Switchgear 2 comprises one or more Ampereconductors 8 or the conductibility rod (for example high voltage bar) along the axis X extension that is contained in housing 6 inboards.

Housing 6 comprises the second portion 6.2 of the side cap section that the first tubular portion 6.1 with longitudinal axis X and formation cooperate with described tubular portion 6.1.Tubular portion 6.1 comprises the side opening of being closed with air-tight manner by side cap section 6.2.

In the example that illustrates, side cap section 6.2 is roughly bell.

Naturally, planar shaped cap section still belongs to the application's scope.In addition, the switchgear that has any other earthed switch setting still belongs to the application's scope.

The application's earthed switch assembly is installed by side cap section 6.2.In the example that illustrates, cap section 6.2 is provided with annular flange 12, by annular flange 12 cap section 6.2 is fastened on the tubular portion 6.1 by the flange 14 that defines described side opening.

The fixed contact 18 of described earthed switch is from side cap section 6.2 projections.

Can be expressly understood that the application's earthed switch assembly can be directly installed in the described housing, and needn't be installed on the support portion in advance.

Because three assembly E1, E2, E3 are similar, therefore followingly will only describe assembly E1 in detail.

Earthed switch assembly E1 is installed in the hole 16 with the longitudinal axis Y that passes cap section 6.2.

Cap section 6.2 is formed for installing the support portion of described fixed contact.

Described assembly is included in fixed contact 18 fixing in the hole 16.

Hole 16 comprises that first 20 is linked to each other by the annular surface 24 that forms shoulder with second portion 22 towards the first smaller diameter portion 20 of the inboard of housing 6 orientation and the second larger diameter part 22 that is orientated towards the outside of housing 6.

Described earthed switch comprises fixed contact 18, removable contact 19 and the mutually contact 10 (by Fig. 4 all as seen) of installing in the mode that electrically contacts with Ampereconductors.

Described removable contact design is for making fixed contact 18 electrically contact with described mutually contact, thereby with described phase contact and the conductor ground connection that links to each other with described phase contact.

In this application, fixed contact 18 comprises the radial projection 26 that described fixed contact is divided into vertical first 28 and vertical second portion 30, first 28 is in cap section 6.2 inside protrusions, and second portion 30 is in cap section 6.2 outside projections, and is designed to ground connection.

How much of radial projection 26 are upper to be formed by two frustum of a

cones

32,34 with longitudinal axis Y, two frustum of a

cones

32,34 reversed dips, thereby in frustum of a

cone

32,34 larger base portion place junction.

Frustum of a

cone

32,34 is marked by the dotted line among Fig. 1.Like this, radial projection 26 comprises around two anchor rings 26.1,26.2 of axis Y and relative axis Y inclination.In practice, described fixed contact for example is formed into single parts by machining.

In the example that illustrates, the connecting portion between two frustum of a

cones

32,34 is cut edge, and forms cylindrical zone 35, thereby avoids wedge angle, reduces the risk of damage.

Assembly E1 also comprises for the device 36 with fixed contact 18 and cap section 6.1 electric insulations.

Device 36 comprises the first sleeve 38 of being made by electrical insulating material of installing around the first 28 of fixed contact 18, and the second sleeve 40 of being made by electrical insulating material of installing around the described second portion of fixed contact 18.

The first sleeve 28 is called " inboard sleeve ", and described the second sleeve is called " outside sleeve ".

For instance, described insulating sleeve is made by PETG (PET), epoxy resin or polytetrafluoroethylene (PTFE).

Inboard sleeve 38 has the internal diameter of the diameter of the first 28 that substantially equals fixed contact 18, so that inboard sleeve 38 can be installed around first 28 with minimum clearance.

Inboard sleeve 38 also comprises inboard inclined-plane 42, and inboard inclined-plane 42 has inclination angle and the basic area that equates that substantially equates with the inclination angle on the first inclined plane 26.1, so that inclined-plane 44 is with planar fashion breasting the first inclined plane 26.1.

In the example that illustrates, inboard sleeve 38 comprises shoulder 41 at its lateral surface, and shoulder 41 is wanted the shoulder 24 in breasting hole 16.Shoulder 41 is with smaller diameter portion 43 interconnection in larger diameter part and the smaller diameter portion 20 that is installed in hole 16.

Advantageously, vent passages 45 is formed in the described inboard sleeve, and its profile and part 43 partly intersect and pass described larger diameter part, and dielectric gas can be arrived between each element, avoid partial discharge.

It is contemplated that use is only by in the larger diameter part that is installed in described hole and the inboard sleeve that forms of the packing ring of the shoulder 24 in the hole 16 of the described cap of breasting section.

Outside sleeve 40 has the internal diameter of the diameter of the second portion 30 that substantially equals fixed contact 18, and outside sleeve 40 can be installed around second portion 30 with minimum clearance.

Outside sleeve 40 also comprises inboard inclined-plane 44, and inboard inclined-plane 44 has inclination angle and the basic equal area that substantially equates with the inclination angle on the second inclined plane 26.2 of radial projection 26, so that inclined-plane 44 is with planar fashion breasting the second inclined plane 26.2.

Outside sleeve 40 comprises shoulder 48 at its lateral surface, grip block 50 breasting shoulders 48.

Grip block 50 comprises center port 51, and the smaller diameter portion 56 of fixed contact 18 and outside sleeve 40 is passed center port 51.

Outside sleeve 40 comprises the larger-diameter first 52 in the larger diameter part 22 that is installed in hole 16 and the second portion 56 that exceeds the small diameter of shoulder 48, and second portion 56 passes grip block 50 and is close to the second portion 30 that is positioned at the outside.

In the example that illustrates, second portion 30 has the diameter less than the diameter of first 28.By such configuration, have the lip-deep creepage distance (creepage distance) of insulating sleeve 40 of second portion 56 of small diameter greater than the creepage distance on the insulating sleeve 38, this be because sleeve 38 in the insulating gas atmosphere of the cleaning of described housing inboard.Between the second sleeve 40 and fixed contact 18, provide sealing device.

For instance, in two O shapes circle, 58 grooves 60 that are installed in separately, groove 60 is made in the side surface of second portion 30 of fixed contact 18.

Between the larger diameter part 22 in hole 16 and outside sleeve 40, also provide sealing device.

For instance, two O shapes circle 61 is installed in the cannelure 63 (cannelure 63 is made in the surface of radial outward of larger diameter part 52 of outside sleeve 40), and contacts with the inner surface of the larger diameter part 22 in hole 16.

These sealing devices provide the static sealing that prevents Leakage Gas.

Naturally, can for example seal to implement sealing by lip by different way in other position, the static sealing of even now does not need such sealing.

Originally inboard sleeve 38 is installed in the hole 16, the shoulder 24 in shoulder 41 breasting holes 16, and then fixed contact 18 is inserted in the inboard sleeve 38, the inclined-plane 42 of the inboard sleeve 38 of the first inclined plane 26.1 breastings of radial projection 26.

Then outside sleeve 40 is installed the second inclined plane 26.2 of the inclined-plane 44 breasting radial projection 26 of outside sleeve 40 by the second portion 30 around fixed contact 18.

Then grip block 50 is installed by the smaller diameter portion 56 around fixed contact 18 and outside sleeve 40.

Grip block 50 is fastened in the described cap section by screw 62, and screw 62 is twisted solid being formed directly in the hole 64 of the described cap section in hole.Clamping occurs in the extruding between the shoulder 48 by outside sleeve 40 and the medial surface 66 of grip block 50.

The smaller diameter portion of the second sleeve 40 is for the electric arcing (electrical flashover) of avoiding between fixed contact 18 and the grip block 50.The length of the second sleeve 40 can be changed, in order to change the resistance to pressure of described switch.

In the example that illustrates, the axial dimension sum of the larger diameter part of the larger diameter of outside sleeve 40 part and inboard sleeve 38 is greater than the degree of depth of the larger diameter part 22 in hole 16.

Like this, the larger diameter part 52 of outside sleeve 40 projects into and exceeds hole 16.

Grip block 50 comprises annular recess 66, and annular recess 66 holds the end of the larger diameter part that projects into the outside sleeve 40 that surpasses described hole, so that can reduce the length of described device, makes it compacter.

The bearing-surface of described grip block is the assembly on plane, and perhaps the shoulder 48 of described outside sleeve flushes with the end in hole 16 and the bearing-surface of grip block 51 is the scope that the assembly on plane can not exceed the application.

How the fixed contact that Fig. 2 illustrates the application's earthed switch assembly is connected for the example of threephase switch equipment.

The free end of the second portion 30 of three fixed contacts 18 respectively comprises par 68 and extends laterally to the hole 70 of par 68.

Three pars 68 are substantially coplanar.

Earth rod 72 has the square-section, comprises that perhaps the earth rod 72 of at least one planar side makes one side breasting par 68.

Rod is 72 fastening by screw nut system 73, and screw nut system 73 is installed in the hole 70 of described free end and in the hole of making in earth rod 72.

Earth rod 72 also directly is fastened in the cap section 6.2 in particularly advantageous mode.For this reason, cap section 6.2 has two protuberances 74, and each protuberance 74 arranges porose, and each hole is between two fixed contacts 18.

Earth rod 72 comprises two through holes that align with described two protuberances 74, in order to can hold for the screw 76 that described earth rod is fastened in the described cap section.

Advantageously, the free end of protuberance 74 aligns with the axial vane surface of described par, and aligns with free end in the smaller diameter portion of the adjacent outside sleeve 40 of described hull outside and fixed contact 18.Stable fastening to earth rod 72 guaranteed in this alignment, and avoided applying distortion to the fixed contact 18 of the earth rod 72 with overhung.

For instance, fixed contact 18 is made of aluminum.

Grip block 50 is by applying along the power of axis Y in outside sleeve 40 extruding, second inclined plane 26.2 and the extruding inclined-plane of outside sleeve 40 between and from outside sleeve 40 be delivered to fixed contact 18 on of this power by radial projection 26.

Like this, the power that is orthogonal to the surface of described contact is broken down into radial component and axial component.

Also radially component and axial component distribute the reaction force at 26.1 places, the first inclined plane.

Therefore, fixed contact 18 is fixed vertically and laterally by radial projection 26.Inboard sleeve 38 and outside sleeve 40 strain during clamping.

Like this, fixed contact 18 is axially and radially kept rigidly.

Advantageously, the inclination angle on the first and second inclined planes of radial projection 26 and advantageously equals 45 ° in 30 ° to 60 ° scopes, to guarantee the distribution of the balance between described radial component and the axial component.The inclination angle on the surface 26.1 that contacts with inboard sleeve 38 can reach 90 °.

Like this, because the rigidity of fixed contact 18 or be bordering on the mechanical fixing of rigidity, the load that is applied to when described removable contact moves on the fixed contact 18 does not cause or causes the movement of fixed contact 18 seldom, thereby no longer includes the risk of degeneration.In addition, because described fixed contact also is formed for the guide support section of rigidity of the slip of described removable contact, the guiding of described removable contact is improved.

Electric insulation between described housing and the described fixed contact is only provided by two

sleeves

38 and 40, does not need to use the electrical insulating material of plastic material type to being used for the screw of fastening clamp plate 50.

The easy elasticity creep of these materials and aging.

In addition, the application's described sleeve and described fixed contact are only by the given shape of described grip block and described element maintenance simultaneously.

In addition, described element presents relatively simple revolving body (body of revolution), makes the simply manufactured and assembling of described shape.

In addition, the application presents the advantage of the independently assembly that provides such, and described assembly is formed by one or more fixed contacts and described cap section, thereby can simplify assembly and disassembly.The pre-installation of this stand-alone assembly is so that can improve the alignment of described contact.

In addition, described assembly presents significant compactedness.

Realize simply air-tightness by relatively firm O shape circle, thereby reduced the risk of leaking.

Described removable contact is with form and the layout of contact can be any known types mutually.

Fig. 4 shows the inboard of the application's switchgear.

Described conductor extends along axis X, and electric current flows along axis X, and described conductor carries the contact 10 of lateral protrusion, and contact 10 is designed to so that described conductor 8 can be grounded, and described contact 10 is called as " phase contact ".

Contact 10 is along the axis Y orientation that is orthogonal to axis X.In the example that illustrates, contact 10 comprises the shell 12 that is electrically connected with conductor 8 and the contact elements 15 of tulip shape, and contact elements 15 is used for holding the end of the contact elements of earthed switch 4.

This tulip shape is also nonrestrictive.

As mentioned above, the application's earthed switch can comprise three assemblies of basic simlarity, and described three assemblies are associated with electric conductor 8 separately.

Only describe an assembly in detail.

Fixing grounding contact 18 comprises the vertical first end that is positioned at housing 6 outsides and is positioned at vertical the second end of housing 6 inboards.

The second portion 28 of fixing grounding contact 18 comprises the shell 80 with axis Y.Therefore, the axis of the axis of shell 80 and contact elements 10 aligns.Shell 80 is provided with peripheral isolation part 82.

Removable grounding contact 19 presents elongated shape, the bar that for example is slidingly installed in shell 80 along the length of axis Y.The external diameter of the internal diameter of shell 80 and removable contact 19 is chosen as so that removable contact 19 does not contact with shell 80.For instance, the internal diameter of shell 80 is than the large 1mm to 4mm of diameter of removable contact 19.

The contact 84 that electrically contacts by tulip shape between removable contact 19 and the fixed contact 18 obtains, and contact 84 is anchored on the open end of shell 80 of fixed contact 18.Like this, removable contact 19 is guided by described contact 84, and mainly by 88 guiding of following guide sleeve.

For instance, the cross section of removable grounding contact 19 is circular, and shell 80 is rendered as circular cross-section.

In the example that illustrates, removable grounding contact 19 comprises vertical first end 19.1 of the contact elements 15 that is designed to penetrate into phase contact 10.

The insulating sleeve 88 and displacement device 86 mechanical connections of vertical the second end of removable grounding contact 19 by sliding around fixed contact 18, displacement device 86 are used for making removable grounding contact 19 to move axially along Y-axis.Advantageously, described displacement device 86 is with respect to described grounding contact Strategic Lateral Offset, in order to can make described assembly compacter.

By the application, the radially maintenance of shell 80 and axial maintenance are improved, and then have guaranteed that removable contact 19 is to the good guiding of phase contact 10.

Mechanical connection between removable grounding contact 19 and the displacement device 86 is at sidepiece.For this reason, the isolation part 82 of shell 80 comprises at least one vertical slit 90, and removable grounding contact 19 is by slit 90 and displacement device 86 mechanical connections.

In the example that illustrates, the isolation part 82 of shell 80 advantageously comprises two radially relative vertical slits 90, and vertical the second end of removable grounding contact 19 comprises the through hole that is orthogonal to axis Y, and the pin 94 that is connected on the displacement device 86 is installed in the described through hole.

The mechanical couplings (mechanical coupling) of balance has been guaranteed in this connection.

In the example that illustrates, the mechanical connection between pin 94 and the displacement device 86 also obtains around the electric insulation sleeve 88 of its slip by surrounding fixing grounding contact 18.

In another variant embodiment, described earthed switch comprises the application's who is installed in the mounting panel fixing grounding contact and removable contact, described removable contact can move along the axis perpendicular to the axis of described fixing grounding contact, in order to described phase contact and described fixing grounding contact are electrically connected.Described removable contact is formed by the bar that passes described fixing grounding contact.

Contact 18 can be used for implementing ground connection other application in addition.For example, it can be formed for conducting representative for the element of the signal (for example temperature) of the operating characteristics of gas-insulated switchgear.

Claims

1. the sleeve pipe of a gas-insulated switchgear (2), described switchgear (2) is filled with the dielectric gas of pressurized and comprises the conductor element (18) that is installed in the support portion (6.2), described support portion (6.2) forms the part of the housing (6) of described switchgear, described support portion (6.2) comprises through hole (16), described conductor element (18) is installed in the described through hole (16), described conductor element (18) comprises the elongated main body that is provided with radial projection (26) on the have longitudinal axis side of (Y), described projection is at first limited by the first anchor ring (26.1) that tilts with respect to described longitudinal axis (Y) in the vertical, and secondly limited by the second anchor ring (26.2) that tilts with respect to described longitudinal axis (Y), described two faces tilt in opposite direction, electric insulation arrangement (38,40) be installed in the described hole (16), and at least between a shoulder (24) and described conductor element (18) of described hole (16), described device comprises with the first inclination anchor ring (26.1) of the described radial projection of mode breasting (26) of face and the inclined plane (42 of the second inclination anchor ring (26.2), 44), and grip block (50) is installed on the described support portion (6.2), and the described electric insulation arrangement (38 of breasting, 40), so that at the described electric insulation arrangement (38 of the described shoulder (24) in the described hole of breasting (16), 40) apply chucking power on.

2. the sleeve pipe of switchgear according to claim 1, wherein said electric insulation arrangement comprises the first sleeve (38) and the second sleeve (40), described the first sleeve (38) is made by the electrical insulating material of the first (28) that centers on described fixed contact (18), be installed between the described shoulder (24) and described radial projection (26) in described hole (16), and be provided with the inclined-plane (42) that contacts with the first inclined plane (26.1) face of described radial projection (26), described the second sleeve (40) is made by the electrical insulating material of the second portion (30) that centers on described fixed contact (18), be installed between described grip block (50) and the described radial projection (26), and be provided with the inclined-plane (44) that contacts with the second inclined plane (26.2) face of described radial projection (26).

3. the sleeve pipe of switchgear according to claim 2, wherein said the second sleeve (40) comprise the larger-diameter part (52) of carrying described inclined-plane (44) and pass and exceed the small diameter portion (56) adjacent with second portions described fixed contact (18) (30) described grip block (50).

4. the sleeve pipe of the described switchgear of any one in 3 according to claim 1, wherein said inclined plane (26.1,26.2) present with respect to described longitudinal axis (Y) in 30 ° to 60 ° scope, and advantageously equal 45 ° inclination angle.

5. the sleeve pipe of the described switchgear of any one in 4 according to claim 1, contact preventing dielectric gas between wherein said the second sleeve (40) and the described conductor element (18) leaks, and the contact preventing dielectric gas between described the second sleeve (40) and described hole (16) leaks.

6. the sleeve pipe of switchgear according to claim 5, wherein O shape circle (58) is installed in the groove (60) in the side surface that is made in described conductor element (18), and contacts with the hole of described the second sleeve (40).

7. according to claim 5 or the sleeve pipe of 6 described switchgears, wherein O shape circle (61) is installed in the groove (63) in the side surface that is made in described the second sleeve (40), and contacts with the described hole (16) of described support portion (6.2).

According to claim 1 in 7 any one in conjunction with the sleeve pipe of claim 2 or 3 described switchgears, the face that contacts with described the second sleeve (40) of wherein said grip block (50) comprises recess (66), and described recess (66) holds the part of the hole from described support portion (6.2) (16) projection of described the second sleeve (40).

9. the sleeve pipe of the described switchgear of any one in 8 according to claim 1, the end of described fixed contact (18) that wherein is designed to be in housing (6) outside of described switchgear comprises par (68) and crosses the hole (70) of described par (68), for stub (72) is installed in described end.

10. earthed switch assembly, comprise that at least one is according to the described sleeve pipe of any one in the aforementioned claim, described conductor element is fixed contact (18), and switch comprises at least one with respect to the removable contact that described fixed contact is slidingly installed, and described removable contact is designed to make described fixed contact (18) and phase contact on the Ampereconductors that is connected to described switchgear to electrically contact.

11. an earthed switch assembly that is used for threephase switch equipment comprises three assemblies according to claim 10.

12. according to the described earthed switch assembly for threephase switch equipment of last claim, wherein three described pars (68) are substantially coplanar, and described rod is earth rod.

13. according to the described earthed switch assembly for threephase switch equipment of last claim, wherein said support portion (6.2) is included in two protuberances (74) on its lateral surface, each described protuberance (74) is positioned between two fixed contact ends (18), and is provided with for the hole that earth rod (72) is fastened in the described cap section (6.2).

14. according to the described earthed switch assembly for threephase switch equipment of last claim, the axial edge of the upper end of wherein said protuberance (74) and described par (68) and substantially coplanar from the longitudinal end of described second sleeve (40) of the outside projection of described cap section (6.2).

15. in the airtight metallic packaging that is filled with the pressurized dielectric gas-high-voltage switch equipment, comprise metal shell (6), at least one is connected to the electric conductor (8) on the phase contact and is installed at least one assembly according to claim 10 on the described housing with air-tight manner.

16. in described according to last claim-high-voltage switch equipment, wherein said housing (6) presents the overall shape of tubulose, the described cap section side direction of described assembly is installed on the described housing.

17. in one kind-high voltage threephase switch equipment, comprise three electric conductors being connected to separately the phase contact and the described assembly of any one in 14 according to claim 11.

18. according to claim 17 in conjunction with claim 13 or 14 described in-high voltage threephase switch equipment, comprise by screw-nut system being fastened to earth rod (72) on the end of described fixed contact (18).

19. in described in conjunction with claim 13 according to last claim-and high voltage threephase switch equipment, wherein said earth rod (72) is fastened in the described cap section (6.2) by the screw (76) of twisting in the hole that is affixed to described protuberance (74).