CN2637873Y

CN2637873Y - Adapler seat capable of proceeding gas density relay calibration in SF6 electric switch

Info

Publication number: CN2637873Y
Application number: CN 03255447
Authority: CN
Inventors: 金海勇
Original assignee: Keli Electric Co ltd Shanghai
Current assignee: Keli Electric Co ltd Shanghai
Priority date: 2003-07-09
Filing date: 2003-07-09
Publication date: 2004-09-01
Anticipated expiration: 2013-07-09

Abstract

The utility model relates to a joint stand which is convenient for verifying a gas density relay in an SF6 electric switch. The gas density relay and a switch body are connected on a first port and a second port of the joint stand. An orifice of the second port at the upper edge of the joint stand runs through a through hole horizontally. A regulating rod is arranged in the other end of the through hole, the gaskets are embedded respectively on a rod head and a rod body of the regulating rod and the rod head of the regulating rod seals is sealed and closed with the orifice of the second port of the tee joint stand by the gaskets. When the utility model is working at normal status, a gas path of a first check valve is communicated with the gas density relay and a second check valve; if verifying or changing the gas density relay, the regulating rod is rotated clockwise so as to make the gasket on the piston head contact reliably with the joint stand, separating the gas path of the first check valve from the relay and the second check valve, therefore, the convenient verification or change can be made to the SF6 gas density relay by electrical power examining and repairing personnel without dismantling the joint stand, which brings convenient operation for electrical power examining and repairing personnel.

Description

A kind of being convenient to SF 6The connection block of the gas density relay verification in the electrical switch

(1) technical field

The utility model relates to a kind of being convenient to SF ₆SF in the electrical switch ₆The connection block of gas density relay verification.

(2) background technique

SF ₆Electrical switch has been widely used in power department, industrial and mining enterprise, has promoted the fast development of power industry.How to guarantee SF ₆The reliable and secure operation of electrical switch has become one of vital task of power department.SF ₆Gas density relay is SF ₆One of key element of electrical switch, it is used for detecting SF ₆SF in the electrical switch body ₆The variation of gas density, its performance quality directly has influence on SF ₆The reliable and secure operation of electrical switch.Be installed on on-the-spot SF ₆Gas density relay is because of often action, and the phenomenon of dumb or poor contact of contacts often appears moving in after date during through one section, and what have also the temperature correction degradation can occur, causes SF when variation of ambient temperature easily ₆The gas density relay misoperation.Therefore original power portion has formulated DL/T596-1996 " power equipment Prophylactic test rules ".This testing regulations regulation: each SF ₆The electrical switch applying unit should be regularly to SF ₆Gas density relay carries out verification.From practical operation situation, to the SF at scene ₆It is to prevent trouble before it happens that gas density relay carries out periodic check, ensures one of necessary means of power equipment safety reliable operation.And at the scene during verification, some SF ₆The gas density relay connection block of electrical switch adopts the form of check valve to connect, as shown in Figure 1.Verification at present or the density monitor 1 of changing this form switch just only unload its tee union seat 2, it and Switch main body 3 are broken away from, that is: make check valve 41 and check valve 42 separately, because of check valve 41 is the check valves that seal automatically, can not leak gas on the body switch 3.Begin verification then or change relay.But the work of unloading connection block is trouble, hard, and is very inconvenient.Moreover when unloading connection block, also because of reason such as careless makes its sealing surface, seal ring suffers damage, and influences sealability, brings hidden danger to safety.

(3) model utility content

The purpose of this utility model is to provide a kind of being convenient to SF ₆SF in the electrical switch ₆The connection block of gas density relay verification, thus make the electric power overhaul personnel need not dismantle connection block, just can be to SF ₆Gas density relay makes things convenient for verification or replacing, for electric power overhaul personnel's operation brings convenience, guarantees SF ₆The safe handling of electrical switch.

A kind of being convenient to provided by the utility model to SF ₆The connection block of the gas density relay verification in the electrical switch comprises the tee union seat, this SF ₆Gas density relay is fixedly connected on by screw rod and gland nut on first interface of described tee union seat, this SF ₆The electrical switch body is connected on second interface of tee union seat by first check valve, connect second check valve on the 3rd interface of described tee union seat, wherein: described first interface and the 3rd interface are to be vertically to the break-through road, it is characterized in that: a through hole is laterally run through in the aperture at tee union seat upper edge second interface, be provided with one in the other end of this through hole and be subjected to movably adjustable lever of external force, be embedded seal ring respectively on the bar head of this adjustable lever and the shaft, again, when this adjustable lever moved inward, the aperture of the seal ring on its bar head and described tee union seat second interface is involution mutually.

Above-mentioned connection block, wherein: the fixedly connected sealing cover in corresponding described adjustable lever place on described tee union seat, sealing lid inboard is provided with a seal ring.

Owing to adopted above-mentioned technical solution, that is: during normal working, the seal ring of regulating on the club head does not contact with the threeway seat, and the gas circuit of first check valve communicates with the gas density relay and second check valve; If want verification or change gas density relay, as long as screw-driver with in-line, adjustable lever is turned clockwise, the seal ring of regulating on the club head reliably contacts with the threeway seat, the gas circuit of first check valve and relay and second check valve are in the partition state, gas density relay is cut off with Switch main body on gas circuit, thereby can carry out verification easily or change gas density relay.Use the utility model to make whole verification or change in the process of relay, just need not dismantle disengaging gas density relay or connection block,, guarantee SF for electric power overhaul personnel's operation brings convenience ₆The safe handling of electrical switch.

(4) description of drawings

Fig. 1 is existing SF ₆The structural representation of the connection block of the gas density relay of electrical switch;

Fig. 2 is the structural representation of the utility model connection block when being in normal working;

Fig. 3 is the structural representation of the utility model connection block when being in verification or changing gas density relay.

(5) embodiment

As shown in Figure 2, the utility model, promptly a kind of being convenient to SF ₆SF in the electrical switch ₆The connection block of gas density relay verification, comprise tee union seat 2 ', this SF ₆Gas density relay 1 by screw rod 5 and gland nut 6 be fixedly connected on described tee union seat 2 ' first interface 21 on, this SF ₆ Electrical switch body 3 is connected in by first check valve 4 on second interface 22 of tee union seat, connects second check valve 8 on the 3rd interface 23 of described tee union seat, and wherein: described first interface 21 and the 3rd interface 23 are to be vertically to the break-through road.

Tee union seat 2 ' on corresponding described first interface 21 places laterally run through a through hole along the aperture, be provided with one in the other end of this through hole and be subjected to movably adjustable lever 9 of external force, be embedded seal ring 91 respectively on the bar head of this adjustable lever 9 and the shaft, again, when this adjustable lever 9 moves inward, its bar head matches with the aperture of described tee union seat second interface 22, and seal in the slit after will being cooperated by the seal ring on the bar head 91.

In addition, tee union seat 2 ' on the fixedly connected sealing cover 10 in corresponding described adjustable lever 9 places, sealing is covered 10 inboards and is provided with a seal ring 7.

Working principle of the present utility model is: as shown in Figure 2, during normal working, the shade of adjustable lever 9 aligns with line EE.This moment, the bar head seal ring 91 of adjustable lever did not contact with the threeway seat, and the gas circuit of first check valve 4 communicates with the gas density relay 1 and second check valve 8, is in normal working.Adjustable lever 9 and tee union seat 2 ' sealing of two roads is arranged, promptly seal gas circuit with seal ring 91, the seal ring 7 that increases sealing cover 10 and Qi Nei is again sealed, the assurance reliable sealing.

If when wanting verification or changing gas density relay 1,, use the screw-driver of in-line then as long as back out sealing cover 10 earlier with spanner, adjustable lever 9 is transferred to the end clockwise, be in Fig. 3 state, the head of adjustable lever 9 aligns with line FF.At this moment, the bar head seal ring 91 of adjustable lever reliably contacts with the threeway seat.The gas circuit of first check valve 4 does not communicate with the gas density relay 1 and second check valve 8, is in the partition state, and gas density relay 1 is cut off with Switch main body 3 on gas circuit.And second check valve 8 communicates on gas circuit with gas density relay 1.So just can utilize second check valve 8 to come the verification density monitor, equally also replaceable gas density relay.

When verification or after changing gas density relay 1 and finishing, with the screw-driver of in-line, adjustable lever 9 inhours are transferred to state as Fig. 2, that is: its shade is alignd with line EE, with spanner sealing cover 10 is screwed on and tightened then and just can.Whole like this verification or change in the relay process just need not have been dismantled disengaging density monitor or connection block, for electric power overhaul personnel's operation brings convenience, guarantees SF ₆The safe handling of electrical switch.

Claims

1. be convenient to SF for one kind ₆The connection block of the gas density relay verification in the electrical switch comprises the tee union seat, this SF ₆Gas density relay is fixedly connected on by screw rod and gland nut on first interface of described tee union seat, this SF ₆The electrical switch body is connected in by first check valve on second interface of tee union seat, connects second check valve on the 3rd interface of described tee union seat, and wherein: described first interface and the 3rd interface are to be vertically the break-through road, it is characterized in that:

A through hole is laterally run through in aperture at tee union seat upper edge second interface, be provided with one in the other end of this through hole and be subjected to movably adjustable lever of external force, be embedded seal ring respectively on the bar head of this adjustable lever and the shaft, again, when this adjustable lever moved inward, the aperture of the seal ring on its bar head and described tee union seat second interface is involution mutually.

2. a kind of being convenient to according to claim 1 to SF ₆The connection block of the gas density relay verification in the electrical switch is characterized in that: the fixedly connected sealing cover in corresponding described adjustable lever outside on described tee union seat, sealing lid inboard is provided with a seal ring.