CN2119711U

CN2119711U - Hydraulic operating mechanism for high-voltage circuit breaker

Info

Publication number: CN2119711U
Application number: CN 92203643
Authority: CN
Inventors: 何堪有; 齐炳利; 胡桂兰; 陈建中; 范崇志
Original assignee: XI-AN HIGH-VOLTAGE FACTORY
Current assignee: XI-AN HIGH-VOLTAGE FACTORY
Priority date: 1992-03-02
Filing date: 1992-03-02
Publication date: 1992-10-21

Abstract

The utility model relates to a hydraulic operating mechanism for high-voltage circuit breakers. The mechanism carries out the integrated design for the main valve system, that is a closed primary valve, a secondary valve, an oil drain valve and a working cylinder are designed into an integral body, dispensing with being connected by exterior pipelines. An oil tank is singly designed to provide hydraulic oil for the hydraulic operating mechanism; consequently the main valve system is made to be exposed out of the oil tank, and the convenience is brought for maintenance. The utility model has reduced oil leakage points, reduced mechanism volume and lightened weight.

Description

Hydraulic operating mechanism for high-voltage circuit breaker

The utility model relates to a kind of primary cut-out hydraulic operating mechanism, especially by accumulator, and the hydraulic operating mechanism that separating brake one step valve, close a floodgate a step valve, secondary valve, fuel outlet valve, working cylinder, fuel tank, oil pump and motor etc. are formed.

Present domestic use be CY III type primary cut-out hydraulic operating mechanism, its working cylinder, the step valve that closes a floodgate, separating brake one step valve, secondary valve, fuel outlet valve all adopt cutting ferrule pipeline connecting mode, the connecting pipeline that uses is many, the easy seepage of hydraulic oil, and mechanism's volume is big.A close a floodgate step valve, separating brake one step valve, secondary valve all is placed in the fuel tank, make install, dismounting, maintenance, very inconvenience of debugging.When the cone valve of secondary valve mediated, hydraulic operating mechanism can not be built pressure, at this moment need open fuel tank cap, touched with hand in oil and blocked three separating brake oil drain outs with hand, started oil pump, just can make valve core reset, build-up pressure.Operation is subject to the impact, etch of separating brake adjustment oil stream and damages.

The purpose of this utility model is exactly a kind of novel primary cut-out hydraulic operating mechanism that designs in order to address the above problem.The main valve system that is about to mechanism carries out integrated design, exactly separating brake one step valve, the step valve that closes a floodgate, secondary valve, fuel outlet valve, working cylinder is designed to an integral body, has separate unit of one's own.Do not need exterior line to connect between member, mechanism is placed in the fuel tank with hydraulic oil, connect with main valve system main member by pipeline, thereby avoided making main member to be immersed in the fuel tank, make troubles to maintenance.Owing to adopted the manifold type design, connect thereby reduced a large amount of pipelines, leakage of oil point is reduced, reduced the space occupancy of element and parts, mechanism's volume is reduced and weight saving.

According to the utility model, utilize each following feature can realize this purpose.At length illustrate and introduce by accompanying drawing, the utility model specific embodiment has been described among the figure.

Accompanying drawing shows this primary cut-out internal structure.Separating brake one step valve steel ball 14, close a floodgate a step valve steel ball 27, non-return valve steel ball 17 and non-return valve steel ball 19 all design the inside at valve body 9, like this, valve body 9 constitutes separating brake one step valve with separating brake one step valve steel ball 14, the step valve steel ball 27 that closes a floodgate, non-return valve steel ball 17 and non-return valve steel ball 19 respectively, a step valve and non-return valve close a floodgate.Secondary valve spool 16 and secondary valve spool 27 are designed in secondary valve valve body 41 inside, thereby constitute secondary valve.Fuel outlet valve valve body 42 constitutes fuel outlet valve with fuel outlet valve steel ball 32 and valve rod 33.Separating brake one-level valve body 9(or combined floodgate one-level valve body) directly connect into an integral body with secondary valve valve body 41, fuel outlet valve valve body 42 and working cylinder cylinder body 39, have separate unit of one's own, do not need exterior line to connect between them.Separating brake one step valve is connected by the oil circuit of design in valve body 9 inside with the step valve that closes a floodgate, separating brake one step valve is connected with the left chamber 15 of secondary valve spool 16 by the oil circuit of design in valve body 9 and valve body 41 inside, the step valve that closes a floodgate is connected with the right chamber 28 of secondary valve spool by the oil circuit of design in valve body 9 and valve body 41 inside, and the combined floodgate chamber of working cylinder directly is connected with secondary valve by the oil circuit of design in secondary valve valve body 41 and fuel outlet valve valve body 42 inside respectively with the high-pressure oil passage 38 and the fuel outlet valve of design in the working cylinder cylinder interior.Fuel tank 31 of design or 36(are convenient for expression separately, and same fuel tank is drawn in two places), be connected with the main valve system by exterior line 30, the operation hydraulic oil is provided.Its operation principle is as follows:

Open oil pump unit 37 hydraulic oil is taken out to accumulator 35 by fuel tank 36, make accumulator 35 build-up pressures, at this moment, 39 the oil circuit 38 from accumulator 35 to working cylinder, and all be in high pressure conditions with secondary valve spool 29 right chambeies 28 27 below from the step valve steel ball that closes a floodgate.

When making electromagnet 24 energisings, or hand is pressed switch knob 23, the step valve steel ball 27 that closes a floodgate is opened, hydraulic oil is opened non-return valve 17 by oil circuit 22, enter secondary valve spool 16 left chambeies 15, seal working cylinder 39 combined floodgate chambeies 4 and fuel tank 31 paths 7 earlier, push spool 29 again open, make hydraulic oil enter working cylinder combined floodgate chamber 4, finally use the conical surface seal 6 of spool 16, the path 5 of cutoff high oil and fuel tank, this moment, all there was hydraulic oil the working cylinder piston both sides, because piston 2 combined floodgate side compression areas greater than separating brake side compression area, so produce downward thrust, are finished combined floodgate.

When tripping electromagnet 12 energisings, or hand is by opening button 11, the hydraulic oil in spool 16 left chambeies 15 is by the separating brake one step valve steel ball 14 that is opened and oil circuit 18, oil circuit 30, flow back to fuel tank 31 rapidly, spool 16 and spool 29 are moved to the left simultaneously, and the blocking-up hydraulic oil passes to the oil circuit 3 in working cylinder combined floodgate chamber 4, open the way to cycle oil 7 and 30 of working cylinder combined floodgate chamber 4 and fuel tank simultaneously, working cylinder piston only had hydraulic oil and made piston 2 motions in the separating brake side this moment, finished separating brake.

When spool 16 and spool 29 mediated, system can not set up oil pressure, at this moment promotes push rod 8, makes spool 16 and 29 reset build-up pressure.

When separating brake, valve rod 13 drives needles 10 and moves downward, and when valve rod 13 is opened branch gate valve 14, divides hydraulic oils below the gate valve 14 to have on a small quantity by the gap between needle 10 and the valve body 9 and oozes upward lubricating cup 40.At this moment, hydraulic oil row is to oil circuit 18 and act on non-return valve 19, makes non-return valve 19 close, and the path of blocking-up lubricating cup 40 and lubricating cup 21 and fuel tank 31 prevents that hydraulic oil from flowing to lubricating cup 40 and lubricating cup 21 in a large number.After separating brake was finished, the fluid in the lubricating cup was opened valve 19 by own wt, by path 20 and 30, was discharged to fuel tank.

Equally, when closing a floodgate, valve rod 25 drives needle 26 and moves downward, when valve rod 25 is opened combined floodgate valve 27, hydraulic oil below the combined floodgate valve 27 has a small amount of by the gap between needle 26 and the valve body 9, row's lubricating cup 21 upward, and the fluid in the lubricating cup is opened valve 19 by own wt, by path 20 and 30, be discharged to fuel tank.When needs were emitted hydraulic oil, driving handle 34 drove valve rod 33, opens valve 32, made hydraulic oil pass through pipeline 30 rows to fuel tank.

Show by above specific embodiment: because the oil circuit that is connected between each member of main valve system design is at valve inner, directly link together between the valve body, do not need outside oil circuit to connect, the main valve system need not be immersed in the fuel tank in addition, thereby make and make, install, keep in repair very easy, and the divide-shut brake impact and the etch of oil stream at a high speed can be born by mechanism, increased its useful life, because the pipeline contact reduces, so issuable leakage of oil point significantly reduces, provide assurance for having solved the leakage of oil problem of long-term puzzlement on China's primary cut-out hydraulic operating mechanism.

Claims

1, a kind of by accumulator (35), separating brake one step valve (14), a step valve (27) closes a floodgate, secondary valve (16,29), fuel outlet valve (32), working cylinder (39), fuel tank (36), oil pump and motor (37) are formed the primary cut-out hydraulic operating mechanism, it is characterized in that separating brake one step valve, a step valve closes a floodgate, secondary valve, fuel outlet valve, working cylinder is designed to an integral body, have separate unit of one's own, connect by the oil circuit that is produced on valve inner between them, be that separating brake one step valve is connected with the step valve that closes a floodgate by internal oil passages, separating brake one step valve is connected with secondary valve by internal oil passages respectively with the step valve that closes a floodgate, secondary valve is connected with working cylinder by internal oil passages, fuel outlet valve by internal oil passages respectively with secondary valve, working cylinder, the step valve that closes a floodgate is connected with separating brake one step valve, fuel tank is a separate unit, by exterior line respectively with working cylinder, accumulator links to each other with fuel outlet valve.

2, primary cut-out hydraulic operating mechanism according to claim 1, it is characterized in that valve body (9) is provided with two lubricating cups (40,21), two lubricating cup bottoms have a hole, the valve rod (13 that is used for separating brake and combined floodgate, 25) place this two hole respectively, two lubricating cups link to each other with fuel tank (36) with valve (19) by valve inner oil circuit (20).

3, hydraulic operating mechanism according to claim 1 is characterized in that being provided with on the secondary valve spool (16) push rod (8), this push rod and secondary valve spool (16) connect together, and this push rod (8) places outside the secondary valve valve body (41) away from an end of spool (16).