CN205609427U - High -speed earthing switch - Google Patents

Abstract

The utility model discloses a high -speed earthing switch. It is including solid utmost point post, end cover head and the operation moving part of sealing, gu seal utmost point post and include metal casing and stretch into two the one number service conductance body and two numbers through -flow conductors in the electrical joint that metal casing's inner chamber middle part has one number and touches the finger, the end cover head includes metal closing cap and electrically conductive support and touches the finger for two numbers, installs insulating cover between electrically conductive support and the metal closing cap, is connected with ground connection row on the electrically conductive support, operation moving part including install insulating cylinder in the hole of electrically conductive support, install in the insulating cylinder can axial displacement the moving contact, the moving contact can stretch into the metal casing middle part and coordinate with the one number service conductance body and two numbers through -flow conductors grafting. After adopting foretell structure, high -speed earthing switch interphase insulation problem and the too big problem of overall dimension reliably can have been solved well to its simple structure, operation.

Description

High speed grounding switch

Technical field

This utility model relates to a kind of earthed switch, specifically a kind of high speed grounding switch, belongs to high-voltage switch gear technical field of electric equipment.

Background technology

High speed grounding switch is the earthed switch with a kind of specific use necessarily closing short circuit current ability, and it is while having ground connection maintenance protection, it may have certain short-circuit making capability, can be with folding capacitance current or inductive current.Therefore high speed grounding switch serves critically important effect in switchgear.

In the last few years, in order to reduce the impact of environment switching devices external insulation performance, reduce the maintenance workload of operation maintenance personnel, improve the power supply reliability of electrical network, many research institutions and manufacturing firm are just at developmental research solid-state insulated switchgear, making switchgear volume more miniaturization, master switch facility uses the structure that phase insulation converts the three-phase split-phase in order to relatively insulate, and outer surface ground shield mostly simultaneously.But traditional high speed grounding switch mostly is three-phase integrated unenclosed construction, overall dimensions is relatively big, and phase insulation problem is affected by the external environment bigger.The most traditional open type high speed grounding switch cannot meet the needs of solid-state insulated switchgear product.

Summary of the invention

The technical problems to be solved in the utility model is to provide a kind of simple in construction, reliable high speed grounding switch.

In order to solve above-mentioned technical problem, high speed grounding switch of the present utility model, the end cap end socket including pole, being arranged on pole side and extend into the operational movement parts in end cap end socket inner chamber；Pole includes the metal shell with two electrical connectors and the one number service current conductor that is encapsulated in metal shell inner chamber by insulator and is respectively protruding in two electrical connectors and No. two through-flow conductors, has the fingertip matched with one number service current conductor and No. two through-flow conductors in the middle part of the inner chamber of metal shell；End cap end socket includes metal cover and is arranged on the conductive support in the middle part of metal cover and No. two fingertips coordinated with conductive support, insulation sleeve is installed between conductive support and metal cover, connect on conductive support and have earthing bar, operational movement parts include the insulating cylinder being arranged in the endoporus of conductive support, be arranged on insulating cylinder in the moving contact that can move axially, moving contact can extend into conductor grafting through-flow with one number service current conductor and No. two in the middle part of metal shell and coordinates.

Form air chamber in described metal cover, in described air chamber, be filled with insulating gas.

The edge's pressure ring laying respectively at two described electrical connectors it is provided with in described insulator.

The end of described No. two through-flow conductors is provided with guide finger.

Described metal shell is aluminum shell.

Described insulator is formed by poured with epoxy resin.

The pressure release passage being positioned at below No. two through-flow conductors it is provided with in described insulator.

After using above-mentioned structure, due to arrange by integrated poured molding poles such as metal shell, epoxy resin and through-flow conductors, it is arranged on the end cap end socket of pole side and extend into the operational movement parts in end cap end socket inner chamber, aluminum shell constitutes the grounding shell of pole, tangible；Through-flow conductor in pole constitutes electrical connection loop when high speed grounding switch is positioned at point position required for switchgear；The structure design of earthing bar forms earth-return circuit, the personal safety of protection maintenance staff with through-flow conductor part after making high speed grounding switch reach to close position；Operational movement parts can realize rapid movement under the drive of operating mechanism, closely forms the state divided or close of high speed grounding switch；Its simple in construction, reliable, high speed grounding switch phase insulation problem and the excessive problem of overall dimensions can be solved well.

Accompanying drawing explanation

Fig. 1 is the gate-dividing state schematic diagram of this utility model high speed grounding switch；

Fig. 2 is the single phase closing view of this utility model high speed grounding switch.

Detailed description of the invention

Below in conjunction with the accompanying drawings and detailed description of the invention, high speed grounding switch of the present utility model is described in further detail.

As it can be seen, high speed grounding switch of the present utility model, the end cap end socket 2 including pole 1, being arranged on pole 1 side and extend into the operational movement parts 3 in end cap end socket 2 inner chamber；Electric conductor 304 it is provided with on operational movement parts 3, pole 1 includes the metal shell 101 with two electrical connectors and the one number service current conductor 107 that is encapsulated in metal shell inner chamber by insulator and is respectively protruding in two electrical connectors and No. two through-flow conductors 109, has the fingertip 108 that conductor 109 through-flow with one number service current conductor 107 and No. two matches in the middle part of the inner chamber of metal shell 101；One number service current conductor 107 and No. two through-flow conductors 109 constitute electric loop when high speed grounding switch is positioned at point position required for switchgear；Metal shell 101 constitutes the grounding shell of pole 1, tangible；Two electrical connectors make the cable wimble structure of standard；Specifically No. one fingertip 108 is arranged on No. two through-flow conductors 109, is closing position and being conductively connected of electric conductor 304 on operational movement parts 3 at high speed grounding switch for realizing；End cap end socket 2 includes metal cover 201, the enclosed valve 202 being arranged on metal cover 201 side, is arranged on the conductive support 205 in the middle part of metal cover 201 and No. two fingertips 204 coordinated with conductive support 205, insulation sleeve 207 is installed between conductive support 205 and metal cover 201, that is realized electrically disconnecting by insulation sleeve 207 between conductive support 205 and metal cover 201, it is ensured that during the operation of high speed grounding switch splitting or integrating, attendant's is perfectly safe；Connecting on conductive support 205 and have earthing bar 206, enclosed valve 202 can be used for high speed grounding switch inside evacuation or inflation when assembling, can be as the interface installing measuring instrument during operation；No. two fingertips 204, conductive support 205, earthing bars 206 conductor 109 through-flow with one number service current conductor 107 and No. two and fingertip 108 can form the earth-return circuit of electrically conducting after constituting grounding device after high speed grounding switch closes；Operational movement parts 3 include the insulating cylinder 203 being arranged in the endoporus of conductive support 205, are arranged on the interior moving contact that can move axially of insulating cylinder 203, and moving contact can extend into and coordinates with one number service current conductor 107 and the grafting of No. two through-flow conductors 109 in the middle part of metal shell 101；Described moving contact includes that the end being arranged in insulating cylinder 203 has the insulated tension pole 303 that the metal pull bar 302 of operation connecting lever 301 is connected and the electric conductor 304 being connected with insulated tension pole 303 with metal pull bar 302, it is additionally provided with sealing ring 305 between described insulating cylinder 203 and moving contact, in thus making operational movement parts 3 be arranged on the insulating cylinder 203 of end cap end socket 2 and by sealing ring 305, forms sealing state；Moving contact can realize rapid movement under the drive of operating mechanism, and then forms the state divided or close of high speed grounding switch；Form air chamber 6 in metal cover 201, be filled with insulating gas in air chamber 6, such as SF6 gas, nitrogen etc..

Further, described metal shell 101 is preferably aluminum shell；Being provided with the pressure release passage being positioned at below No. two through-flow conductors 109 in described insulator, pressure release passage 106 can occur explosion during arcing fault inside high speed grounding switch, reduces the extent of injury of equipment overall failure；Described insulator is formed by poured with epoxy resin, say, that through-flow to one number service current conductor 107 and No. two conductor 109 sealing and is formed two external electrical joints, an internal interface (one number service current conductor 107 and the intersection of No. two through-flow conductors 109) and a pressure release passage 106 in aluminum shell 101 by epoxy resin；Being provided with the pressure ring 103 of the edge laying respectively at two electrical connectors in described insulator, grading ring 103 plays the effect improving electric field；The end of No. two through-flow conductors 109 is provided with guide finger 104, and guide finger 104 for playing guide effect when high speed grounding switch closes；Being also provided with radome 105 at the most internal interface, radome 105 is then for improving the electric field of high speed grounding switch incision position；Described metal cover 201 is cast aluminium alloy, as grounding shell and the mounting bracket of motion parts；

Wherein, number fingertip 108, radome 105 can overall conductor 109 through-flow with one number service current conductor 107 and No. two assembled after together with carry out sealing cast, it is also possible to make the structure reassembled after one number service current conductor 107 and No. two through-flow conductor 109 sealing casting complete into.

Its operation principle is as follows:

When high speed grounding switch of the present utility model is encased in solid-state insulated switchgear inside, two electrical connectors use the connected mode of cable coneheads to realize being connected with the output interface of terminal device respectively；Position shown in Fig. 1, for point state of novel high speed grounding switch, now one number service current conductor 107 and No. two through-flow conductors 109 realize electrical communication with equipment, constitute the electrical connection loop required for solid-state insulated switchgear.

When needs carry out closing operation, under the drive of operating mechanism, operational movement parts 3 are to the left side rapid movement shown in figure, in a number fingertip 108 of the electric conductor 304 quick insertion pole 1 on moving contact, and then form one number service current conductor 107 and 109, fingertip 108 of No. two through-flow conductors, 304, No. two fingertips 204 of electric conductor, conductive support 205, the electrical connection loop of earthing bar 206, it is achieved the ground connection of device port；

When needs carry out point operation, under the drive of operating mechanism, operational movement parts 3 are to the right rapid movement shown in figure, electric conductor 304 and fingertip 108 sharp separation, thus realize point operating of high speed grounding switch.

Owing to there may be capacity current or inductance current in system circuit, therefore high speed grounding switch is when splitting or integrating operates, electric arc may be produced between fracture, it is thus desirable to be filled with certain low-pressure insulating gas in air chamber 6, making while operational movement parts 3 rapid movement, insulating gas can play power-assisted during high speed grounding switch splitting or integrating and extinguish the effect of electric arc.

Claims (7)

1. a high speed grounding switch, it is characterised in that: include pole (1), the end cap end socket (2) being arranged on pole (1) side and the operational movement parts (3) extending in end cap end socket (2) inner chamber；Described pole (1) includes the metal shell (101) with two electrical connectors and the one number service current conductor (107) that is encapsulated in metal shell inner chamber by insulator and is respectively protruding in two electrical connectors and No. two through-flow conductors (109), has the fingertip (108) matched with one number service current conductor (107) and No. two through-flow conductors (109) in the middle part of the inner chamber of described metal shell (101)；Described end cap end socket (2) includes metal cover (201) and the conductive support (205) being arranged on metal cover (201) middle part and No. two fingertips (204) coordinated with conductive support (205), insulation sleeve (207) is installed between described conductive support (205) and metal cover (201), the upper connection of described conductive support (205) has earthing bar (206), described operational movement parts (3) include the insulating cylinder (203) being arranged in the endoporus of conductive support (205), the moving contact that can move axially in being arranged on insulating cylinder (203), described moving contact can extend into metal shell (101) middle part and coordinates with one number service current conductor (107) and the grafting of No. two through-flow conductors (109).

2. according to the high speed grounding switch described in claim 1, it is characterised in that: forming air chamber (6) in described metal cover (201), described air chamber is filled with insulating gas in (6).

3. according to the high speed grounding switch described in claim 1, it is characterised in that: it is provided with the edge's pressure ring (103) laying respectively at two described electrical connectors in described insulator.

4. according to the high speed grounding switch described in claim 1, it is characterised in that: the end of described No. two through-flow conductors (109) is provided with guide finger (104).

5. according to the high speed grounding switch described in claim 1, it is characterised in that: described metal shell (101) is aluminum shell.

6. according to the high speed grounding switch described in claim 1, it is characterised in that: described insulator is formed by poured with epoxy resin.

7. according to the high speed grounding switch described in claim 1, it is characterised in that: it is provided with the pressure release passage being positioned at No. two through-flow conductor (109) lower sections in described insulator.