CN2256583Y - Hydraulic driving mechanism for high voltage circuit breaker - Google Patents

Abstract

The utility model provides a hydraulic driving mechanism for a high voltage circuit breaker, which is composed of a main body doughnut, a subsidiary doughnut, and an end cover, wherein, the main body doughnut is provided with a second level differential motion cone valve, the lower part of the second level differential motion cone valve is communicated with a switching off oil drainage hole, the left upper part of the second differential motion cone valve is communicated with a switching on oil passage, and the right side is connected with a guide tube which is provided with a return spring; the upper part of a cavity on which the guide tube is arranged is respectively provided with a by-pass non-return valve and a switching off non-return valve, the by-pass non-return valve is communicated with a by-pass oil passage and is communicated with a normal high pressure oil passage through a switching on first level ball valve, and the subsidiary doughnut is provided with a non-return valve, a hollow non-return valve, and a normal high pressure oil passage. The utility model has the advantages of simple and compact structure, good sealing, and reliable work performance.

Description

The primary cut-out hydraulic drive mechanism

The utility model relates to a kind of primary cut-out hydraulic drive mechanism.

Hydraulic drive mechanism is to close power source with separating brake as the pass of primary cut-out.At present the hydraulic drive mechanism kind used of China is a lot, but practical application many be the CY3 hydraulic drive mechanism.The sort of hydraulic drive mechanism all exists loosely organized numerous and diverse, and the open conduit of link is many, and what some key positions adopted is the relatively poor ball valve of sealing property, and institute is so that the position of Vent leakage hydraulic oil is many.Because the unreasonable structure of its oil circuit makes mechanism restart oil pump after decompression and suppresses and can " divide " phenomenon slowly by the generation hydraulic drive mechanism, thereby makes the primary cut-out that is under the "on" position also produce " dividing slowly ", causes serious adverse consequences.

The purpose of this utility model is to provide a kind of compact conformation and simple, good seal performance can prevent a kind of primary cut-out hydraulic drive mechanism that " dividing slowly ", phenomenon occurred.It can prevent effectively that hydraulic drive mechanism from " dividing " generation of phenomenon slowly, thereby guarantees the reliable service behaviour of hydraulic drive mechanism.

The utility model is to realize like this, it is by a main body body, the attached body and the end cap of helping constitutes, middle part in the main body body is provided with a differential cone valve of secondary, be provided with a self-holding circuit φ 0.5 fuel-economizing hole in the differential cone valve of secondary, the bottom of the differential cone valve of secondary is being communicated with a separating brake outage, be communicated with a combined floodgate oil duct in the differential cone valve left upper portion of secondary, the differential cone valve of the secondary right side is connecting a guide pipe, on guide pipe, be provided with a back-moving spring, top at the cavity at guide pipe place is provided with a bypass non-return valve and a separating brake non-return valve, the bypass non-return valve is being communicated with the bypass oil duct, the bypass oil duct is communicated with normal high-pressure oil duct by a combined floodgate one-level ball valve, be communicated with an outage on the separating brake non-return valve, the attached left side that helps the body to be connected the main body body, attached helping is provided with a non-return valve and sheathed a hollow non-return valve and a normal high-pressure oil duct on non-return valve in the body, non-return valve is communicated with normal high-pressure oil duct, hollow non-return valve is communicated with the combined floodgate oil duct, the attached body that helps is connected with seal washer by hollow joint with the normal high-pressure oil duct interface of main body body connecting portion, hollow non-return valve is connected by seal washer with combined floodgate oil duct interface, and end cap is connected the right side of the main body.

Advantage of the present utility model is that its whole oil circuit all is located within the body, the main body body all adopts seal washer or hollow joint and seal washer sealing with the attached junction of relevant oil circuit between the body that helps, improved self-holding circuit simultaneously, the normal high-pressure oil pipe of having transformed on the combined floodgate body is dark oil duct, thereby the Vent that has strictly controlled hydraulic oil leaks, make the compact conformation of hydraulic drive mechanism and simple, good seal performance.Machinery that former mechanism installs additional is anti-" to divide " device slowly owing to removed, make the differential cone valve motion of secondary flexibly, and set up guide pipe and back-moving spring, the check cone valve just can make driving mechanism can not produce " dividing slowly " phenomenon, the unnecessary trouble that the rapid decompression phenomenon is brought in the debug process can not occur.Make the differential cone valve concentricity of secondary improve owing to installed guide pipe additional, the typing of the differential cone valve side-to-side movement of secondary track has guaranteed that in making process the sealing valve port line is accurate, and is stable when also making the back-moving spring compression.Globe valve is a cone valve in the passage that is communicated with in the cavity of the differential cone valve of secondary right side owing to change, and keeps stable oil pressure in the time of can making hydraulic oil place, the differential cone valve of secondary right side "on" position.Because having set up non-return valve can make hydraulic oil make directed flow, the hydraulic oil that enters this valve must not return.

Description of drawings:

This accompanying drawing is an overall structure "on" position cutaway view of the present utility model.

1 is the main body body among the figure, the 2nd, and the differential cone valve of secondary, the 3rd, guide pipe, the 4th, back-moving spring, the 5th, bypass non-return valve, the 6th, bypass oil duct, the 7th, combined floodgate one-level ball valve, the 8th, combined floodgate iron core push rod, the 9th, separating brake check Fujian, the 10th, separating brake iron core push rod, the 11st, outage, the 12nd, combined floodgate oil duct, the 13rd, separating brake outage, the 14th, self-holding circuit φ 0.5 fuel-economizing hole, the 15th, the attached body that helps, the 16th, normal high-pressure oil duct, the 17th, non-return valve, the 18th, hollow non-return valve, the 19th, hollow joint, the 20th, seal washer, the 21st, end cap.

The utility model is further specified with embodiment below in conjunction with accompanying drawing:

The utility model is by a main body body (1), the attached body (15) and the end cap (21) of helping constitutes, middle part in the main body body (1) is provided with a differential cone valve of secondary (2), be provided with a self-holding circuit φ 0.5 fuel-economizing hole (14) in the differential cone valve of secondary (2), the bottom of the differential cone valve of secondary (2) is being communicated with a separating brake outage (13), be communicated with a combined floodgate oil duct (12) in the differential cone valve of secondary (2) left upper portion, the differential cone valve of secondary (2) right side is connecting a guide pipe (3), on guide pipe (3), be provided with a back-moving spring (4), top at the cavity at guide pipe (3) place is provided with a bypass non-return valve (5) and a separating brake non-return valve (9), bypass non-return valve (5) is being communicated with bypass oil duct (6), bypass oil duct (6) is communicated with normal high-pressure oil duct (16) by combined floodgate one-level ball valve (7), be communicated with an outage (11) on the separating brake non-return valve (9), the described attached left side that helps the body (15) to be connected the main body body (1) by bolt, attached helping is provided with a non-return valve (17) and goes up sheathed a hollow non-return valve (18) and a normal high-pressure oil duct (16) at non-return valve (17) in the body (15), non-return valve (17) is communicated with normal high-pressure oil duct (16), hollow non-return valve (18) is communicated with combined floodgate oil duct (12), be connected with seal washer (20) by hollow joint (19) with normal high-pressure oil duct (16) interface of the main body body (1) connecting portion at the attached body (15) that helps, hollow non-return valve (18) is connected by seal washer (20) with combined floodgate oil duct (12) interface, and end cap (21) is connected the right side of the main body body (1) by bolt.According to structure of the present utility model, now its operating principle is illustrated, after oil pump becomes normal pressure oil into normal hydraulic oil, be full of hydraulic oil in the normal high-pressure oil duct (16).After sending the order of closing a floodgate in the master-control room, closing coil is charged, combined floodgate iron core push rod (8) moves downward, back down combined floodgate one-level ball valve (7), hydraulic oil enters secondary by bypass oil duct (6) by bypass non-return valve (5), the right side of differential cone valve (2), because the differential cone valve of secondary (2) right side sectional area is greater than the left side, under the situation that pressure equates, the right side work done is greater than the left side, so the differential cone valve of secondary (2) direction motion to the left, close the left side valve port, the while differential cone valve of secondary (2) valve rod head space heart cone valve (18), a large amount of hydraulic oils flow into combined floodgate oil ducts (12) and advance people's working cylinder combined floodgate side, drive primary cut-out and close a floodgate fast.The effect of bypass check cone valve (5), separating brake non-return valve (9) makes the hydraulic oil on the differential cone valve of secondary (2) right side must not produce the Vent leakage.When the check cone valve produced micro-Vent and leaks, self-keeping circuit φ 0.5 fuel-economizing hole (14) replenished hydraulic oil at any time, makes primary cut-out be in permanent "on" position.When assigning the separating brake order in the master-control room, switching winding is charged, separating brake iron core push rod (10) moves downward, back down separating brake non-return valve (9), the hydraulic oil on the differential cone valve of secondary (2) right side is drained by outage (11), after the decompression of the differential cone valve of secondary (2) right side, the merit that the left side hydraulic oil is done promotes the differential cone valve of secondary (2) valve body and moves right, open seal, the oil-feed of hollow cone valve (18) sealing simultaneously road junction, at this moment a large amount of hydraulic oils is drained by separating brake outage (13), and φ 0.5 keeps fuel-economizing hole, loop (14) also ineffective, working cylinder combined floodgate side decompression, working cylinder makes primary cut-out be in gate-dividing state under the work done of separating brake side at high pressure.

Claims (1)

1. A kind of primary cut-out hydraulic drive mechanism, it is by a main body body (1), the attached body (15) and the end cap (21) of helping constitutes, it is characterized in that the middle part in the described main body body (1) is provided with a differential cone valve of secondary (2), be provided with a self-holding circuit φ 0.5 fuel-economizing hole (14) in the differential cone valve of secondary (2), the bottom of the differential cone valve of secondary (2) is being communicated with a separating brake outage (13), be communicated with a combined floodgate oil duct (12) in the differential cone valve of secondary (2) left upper portion, the differential cone valve of secondary (2) right side is connecting a guide pipe (3), on guide pipe (3), be provided with a back-moving spring (4), top at the cavity at guide pipe (3) place is provided with a bypass non-return valve (5) and a separating brake non-return valve (9), bypass non-return valve (5) is being communicated with bypass oil duct (6), bypass oil duct (6) is communicated with high-pressure oil duct (16) by combined floodgate one-level ball valve (7), be communicated with an outage (11) on the separating brake non-return valve (9), the described attached left side that helps the body (15) to be connected main body drive shell (1), attached helping is provided with a non-return valve (17) in the drive shell (15), and go up sheathed a hollow non-return valve (18) and a normal high-pressure oil duct (16) at non-return valve (17), non-return valve (17) is communicated with normal high-pressure oil duct (16), hollow non-return valve (18) is communicated with combined floodgate oil duct (12), the attached body (15) that helps is connected with seal washer (20) by hollow joint (19) with normal high-pressure oil duct (16) interface of the main body body (1) connecting portion, hollow non-return valve (18) is connected by seal washer (20) with combined floodgate oil duct (12) interface, and end cap (21) is connected the right side of the main body body (1).

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