CN104319120A - Time delay mechanism, hydraulic operating mechanism with time delay mechanism and breaker with time delay mechanism - Google Patents

Time delay mechanism, hydraulic operating mechanism with time delay mechanism and breaker with time delay mechanism Download PDF

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Publication number
CN104319120A
CN104319120A CN201410662208.XA CN201410662208A CN104319120A CN 104319120 A CN104319120 A CN 104319120A CN 201410662208 A CN201410662208 A CN 201410662208A CN 104319120 A CN104319120 A CN 104319120A
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CN
China
Prior art keywords
hydraulic cylinder
auxiliary
piston rod
delay mechanism
moving knife
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201410662208.XA
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Chinese (zh)
Other versions
CN104319120B (en
Inventor
顾根泉
孙艳玲
李海文
张全民
雷琴
曾宪楠
张建周
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Henan Pinggao Electric Co Ltd
Original Assignee
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Henan Pinggao Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by State Grid Corp of China SGCC, Pinggao Group Co Ltd, Henan Pinggao Electric Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201410662208.XA priority Critical patent/CN104319120B/en
Publication of CN104319120A publication Critical patent/CN104319120A/en
Application granted granted Critical
Publication of CN104319120B publication Critical patent/CN104319120B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/24Power arrangements internal to the switch for operating the driving mechanism using pneumatic or hydraulic actuator
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/44Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/054Application timeslot: duration of actuation or delay between or combination of subsequent actuations determines selected function

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Actuator (AREA)

Abstract

The invention relates to a time delay mechanism, a hydraulic operating mechanism with the time delay mechanism and a breaker with the time delay mechanism. The time delay mechanism comprises an auxiliary hydraulic cylinder and an auxiliary switch connected in a corresponding switching-off control loop in series, and the auxiliary hydraulic cylinder is provided with a piston rod of which the axis extends in the left and right direction. The auxiliary switch is provided with a moving knife and a static knife, wherein the moving knife and the static knife are arranged on the right side of the piston rod. The moving knife is connected with a drive rod which can move linearly in the left and right direction, and the left end of the drive rod is provided with a stress part which is used for being matched with the right end of the piston rod in a pushing mode so that the moving knife and the static knife can be driven by the stress part to be switched on when the drive rod moves rightwards. The problems that in the prior art, due to a crank link mechanism, the structure of the time delay mechanism is complex, and lateral force can be exerted on the piston rod of the auxiliary hydraulic cylinder are solved.

Description

Time-delay mechanism and use hydraulic actuating mechanism and the circuit breaker of this time-delay mechanism
Technical field
The present invention relates to a kind of time-delay mechanism and use hydraulic actuating mechanism and the circuit breaker of this time-delay mechanism.
Background technology
When circuit breaker carries out conjunction point operation, the conjunction point interval of circuit breaker must be controlled, the contact of circuit breaker is closed a floodgate on earth, and make the gas pressure in arc control device air cylinder, air cylinder volume could carry out sub-switching operation after returning to normal condition, again to ensure the break performance of circuit breaker.Because the operate time of relay protection of power system is shorter, and do not allow artificial to add time delay, the conjunction of circuit breaker divides time needs to be ensured by the structure of operating mechanism self, needs to arrange time-delay mechanism in the operating mechanism of therefore circuit breaker.
Existing hydraulic actuating mechanism comprises divide-shut brake hydraulic cylinder and time-delay mechanism, time-delay mechanism comprises the auxiliary hydraulic cylinder that auxiliary switch one has deferred action, the piston rod of auxiliary hydraulic cylinder is connected with the moving knife of auxiliary switch by toggle, and auxiliary switch string is located in the separating brake control loop of hydraulic actuating mechanism.During use, the piston rod of divide-shut brake hydraulic cylinder stretches out and drives the dynamic and static contact of circuit breaker to close a floodgate, the motion of divide-shut brake hydraulic cylinder combined floodgate put in place and time delay certain hour after, auxiliary hydraulic cylinder just can drive auxiliary switch to close, now separating brake control loop just conducting, circuit breaker just can carry out sub-switching operation, and time-delay mechanism ensure that the time interval between the action of feed motion distance separating brake, achieves the self-defense capability of circuit breaker.Existing this time-delay mechanism Problems existing is: the piston rod of auxiliary hydraulic cylinder is connected with the moving knife of auxiliary switch by toggle, the setting of toggle adds the complex structure degree of time-delay mechanism, also occupy larger space simultaneously, be unfavorable for that the miniaturization of time-delay mechanism makes, toggle applies side force to the piston rod of auxiliary hydraulic cylinder simultaneously, this side force causes the piston rod movement of auxiliary hydraulic cylinder dumb, easily there is the problem of time delay failure, piston rod should after being subject to side force in addition, easily there is deflection in the motion of piston rod, this will cause the easy inordinate wear sealing ring of piston rod, easily there is Leakage in auxiliary hydraulic cylinder.
Summary of the invention
The object of the present invention is to provide a kind of time-delay mechanism, cause time-delay mechanism's complex structure and the problem that can produce side force to the piston rod of auxiliary hydraulic cylinder to solve toggle in prior art; The present invention also aims to provide a kind of hydraulic actuating mechanism and the circuit breaker that use this time-delay mechanism.
In order to solve the problem, in the present invention, the technical scheme of time-delay mechanism is:
Time-delay mechanism, comprise auxiliary hydraulic cylinder and for going here and there the auxiliary switch be located in corresponding separating brake control loop, auxiliary hydraulic cylinder has the piston rod that axis extends in left-right direction, auxiliary switch has moving knife and quiet cutter, moving knife is connected with can the drive link be placed on the right side of described piston rod of rectilinear motion in left-right direction, the left end of drive link have for coordinate with described piston rod right-hand member pushing tow with at drive link towards the forced section driving moving knife when moving right, quiet cutter closes a floodgate.
Described auxiliary switch is by the right-hand member of Bracket setting in described auxiliary hydraulic cylinder.
Described auxiliary switch is a sensitive switch.
In the present invention, the technical scheme of hydraulic actuating mechanism is:
Hydraulic actuating mechanism, comprise time-delay mechanism and separating brake control loop, time-delay mechanism comprises auxiliary hydraulic cylinder and goes here and there the auxiliary switch be located in described separating brake control loop, auxiliary hydraulic cylinder has the piston rod that axis extends in left-right direction, auxiliary switch has moving knife and quiet cutter, moving knife is connected with can the drive link be placed on the right side of described piston rod of rectilinear motion in left-right direction, the left end of drive link have for coordinate with described piston rod right-hand member pushing tow with at drive link towards the forced section driving moving knife when moving right, quiet cutter closes a floodgate.
Described auxiliary switch is by the right-hand member of Bracket setting in described auxiliary hydraulic cylinder.
Described auxiliary switch is a sensitive switch.
Hydraulic actuating mechanism also comprises hydraulic circuit and divide-shut brake hydraulic cylinder, the oil pump that hydraulic circuit comprises fuel tank and is connected with described fuel tank, auxiliary hydraulic cylinder is connected with the oil-out of oil pump by the first oil circuit be arranged in parallel with the rod chamber of divide-shut brake hydraulic cylinder, the rodless cavity of auxiliary hydraulic cylinder, divide-shut brake hydraulic cylinder is connected by the second oil circuit be arranged in parallel, described second oil circuit be connected with auxiliary hydraulic cylinder is gone here and there and is provided with choke valve, separating brake control loop comprises and is arranged at the second oil circuit, two-bit triplet reversal valve between the first oil circuit and fuel tank.
In the present invention, the technical scheme of circuit breaker is:
Circuit breaker, comprise hydraulic actuating mechanism, hydraulic actuating mechanism comprises time-delay mechanism and separating brake control loop, time-delay mechanism comprises auxiliary hydraulic cylinder and goes here and there the auxiliary switch established in described separating brake control loop, auxiliary hydraulic cylinder has the piston rod that axis extends in left-right direction, auxiliary switch has moving knife and quiet cutter, moving knife is connected with can the drive link be placed on the right side of described piston rod of rectilinear motion in left-right direction, the left end of drive link have for coordinate with described piston rod right-hand member pushing tow with at drive link towards the forced section driving moving knife when moving right, quiet cutter closes a floodgate.
Described auxiliary switch is a sensitive switch.
Hydraulic actuating mechanism also comprises hydraulic circuit and divide-shut brake hydraulic cylinder, the oil pump that hydraulic circuit comprises fuel tank and is connected with described fuel tank, auxiliary hydraulic cylinder is connected with the oil-out of oil pump by the first oil circuit be arranged in parallel with the rod chamber of divide-shut brake hydraulic cylinder, the rodless cavity of auxiliary hydraulic cylinder, divide-shut brake hydraulic cylinder is connected by the second oil circuit be arranged in parallel, described second oil circuit be connected with auxiliary hydraulic cylinder is gone here and there and is provided with choke valve, separating brake control loop comprises and is arranged at the second oil circuit, two-bit triplet reversal valve between the first oil circuit and fuel tank.
Beneficial effect of the present invention is: the moving knife of the auxiliary switch in the present invention is connected with can the drive link of rectilinear motion in left-right direction, after the piston rod of auxiliary hydraulic cylinder stretches out, the piston rod of auxiliary hydraulic cylinder can pushing tow drive link towards moving right the moving knife with auxiliary switch, quiet cutter closes a floodgate, because the direction of motion of drive link is consistent with the direction of motion of the piston rod of auxiliary switch, therefore toggle can be saved, the piston rod of auxiliary switch can direct pushing tow drive link and drive moving knife to move, simplify the structure of time-delay mechanism, drive link also can not produce side force to the piston rod of auxiliary switch in addition, ensure that the useful life of auxiliary hydraulic cylinder.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of hydraulic actuating mechanism in the present invention;
The structural representation of Tu2Shi Tu1Zhong time-delay mechanism.
Embodiment
The embodiment of circuit breaker is as shown in Figure 1 and 2: comprise moving contact 1, fixed contact and hydraulic actuating mechanism, hydraulic actuating mechanism comprises separating brake control loop, time-delay mechanism 8, divide-shut brake hydraulic cylinder 2 and hydraulic circuit, divide-shut brake hydraulic cylinder 2 and moving contact are in transmission connection, time-delay mechanism comprises auxiliary hydraulic cylinder 9 and goes here and there the auxiliary switch 10 be located in separating brake control loop, in the present embodiment, auxiliary switch is a sensitive switch, auxiliary switch 10 is arranged on auxiliary hydraulic cylinder by support 13, auxiliary hydraulic cylinder has the piston rod 16 that axis extends in left-right direction, auxiliary switch is a sensitive switch, auxiliary switch has moving knife, quiet cutter and can the drive link 14 of rectilinear motion in left-right direction, sensitive switch belongs to prior art, its concrete structure no longer describes in detail, dynamic, quiet cutter is placed in the right side of the piston rod of auxiliary hydraulic cylinder, drive link 14 is connected with moving knife, drive link 14 is coaxially set with the piston rod of auxiliary hydraulic cylinder, the left end of drive link 14 has for coordinating to drive moving knife at drive link towards when moving right with piston rod 16 right-hand member pushing tow, the forced section that quiet cutter closes a floodgate.When the piston rod 16 of auxiliary hydraulic cylinder stretches out, the forced section of the piston rod pushing tow drive link 14 of auxiliary hydraulic cylinder makes drive link move right, and drive link can drive moving knife, quiet cutter to close a floodgate, thus makes the conducting of separating brake control loop.The oil pump 4 that hydraulic circuit comprises fuel tank 5 and is connected with fuel tank 5, auxiliary hydraulic cylinder 9 is connected with the oil-out of oil pump 4 by the first oil circuit 11 be arranged in parallel with the rod chamber of divide-shut brake hydraulic cylinder 2, the rodless cavity of auxiliary hydraulic cylinder, divide-shut brake hydraulic cylinder is connected by the second oil circuit 12 be arranged in parallel, the second oil circuit be connected with auxiliary hydraulic cylinder is gone here and there and is provided with choke valve 7, separating brake control loop comprises and is arranged at the second oil circuit, two-bit triplet reversal valve 6 between the first oil circuit and fuel tank.Choke valve is arranged on the cylinder body 17 of auxiliary hydraulic cylinder, the piston hole running through cylinder body is in left-right direction provided with in the cylinder body of auxiliary hydraulic cylinder, the valve body 18 of choke valve is installed on the left end of piston hole, piston rod 16 guiding movement of auxiliary hydraulic cylinder is assemblied in the right-hand member of piston hole, the axial hole 20 extended in left-right direction and the radial hole 21 extended along the cylinder body radial direction of auxiliary hydraulic cylinder is provided with in the valve body of choke valve, radial hole is communicated with axial hole, the left end of axial hole is installed with adjustment screw 19, axial hole can be adjusted by moving left and right of adjustment screw, the through-current capacity of radial hole, the rodless cavity of auxiliary hydraulic cylinder is surrounded by the piston rod of auxiliary hydraulic cylinder and the valve body of choke valve.The right-hand member of piston hole is provided with and leads the fairlead passed for piston rod, is provided with sealing ring between fairlead and piston rod.
Oil pump sucks low pressure oil from fuel tank and exports hydraulic oil, the hydraulic oil exported enters in accumulator 3 and stores, when hydraulic actuating mechanism receives combined floodgate order, two-position three-way valve is transformed into closing position, divide-shut brake hydraulic cylinder is all communicated with high-pressure system by two-position three-way valve with the rodless cavity of auxiliary hydraulic cylinder, the piston rod of divide-shut brake hydraulic cylinder and auxiliary hydraulic cylinder all stretches out, divide-shut brake Driven by Hydraulic Cylinder is moved, fixed contact closes a floodgate, due to the effect of choke valve, the action of auxiliary hydraulic cylinder can be slower than divide-shut brake hydraulic cylinder, dynamic, first fixed contact completes feed motion, breaker closing put in place and time delay certain hour after, the piston rod of auxiliary hydraulic cylinder drives the moving knife of auxiliary switch, quiet cutter closes a floodgate, now separating brake control loop conducting, at this moment, hydraulic actuating mechanism just can carry out sub-switching operation, the conjunction this ensures that thering circuit breaker divides operate time, moving axially by adjustment screw, the speed of auxiliary hydraulic cylinder action can be controlled, to meet the requirement of involutory point of time of circuit breaker.When needs breaker open operation, separating brake control loop controls the commutation of two-bit triplet reversal valve, and the second oil circuit is communicated with fuel tank by two-bit triplet reversal valve, thus the piston rod realizing divide-shut brake hydraulic cylinder and auxiliary hydraulic cylinder is retracted.In the present invention, time-delay mechanism can be used for the hydraulic actuating mechanism of various model, controls breaker closing and puts in place and just can carry out separating brake action, to ensure the break performance of circuit breaker after postponing certain hour.
The direction of motion of the drive link of auxiliary switch is consistent with the direction of motion of the piston rod of auxiliary hydraulic cylinder, therefore the reliable transmission that drive mechanism just can ensure between piston rod and drive link need be set between piston rod and drive link, simplify the structure of time-delay mechanism, also reduce taking up room of time-delay mechanism simultaneously; Drive link can not produce side force to piston rod, ensure that the stability of piston rod movement, and piston rod can not produce excessive wear to the sealing ring on fairlead, and auxiliary hydraulic cylinder not easy oil leakage, ensure that the useful life of auxiliary hydraulic cylinder.In other embodiment of this circuit breaker: auxiliary switch also can not by Bracket setting on auxiliary hydraulic cylinder, such as be arranged on the bearing outside independent of auxiliary hydraulic cylinder by auxiliary switch; Auxiliary switch may not be sensitive switch, such as auxiliary switch is one, and common have can the switch of drive link of rectilinear motion; The axis of the axis of drive link and the piston rod of auxiliary switch also can be arranged in parallel.
The embodiment of hydraulic actuating mechanism is as shown in Figure 1 and 2: the concrete structure of hydraulic actuating mechanism is identical with the hydraulic actuating mechanism described in above-mentioned each circuit breaker embodiment, is not described in detail in this.
The embodiment of time-delay mechanism is as shown in Figure 1 and 2: the concrete structure of time-delay mechanism is identical with the time-delay mechanism described in above-mentioned each circuit breaker embodiment, is not described in detail in this.

Claims (10)

1. time-delay mechanism, comprise auxiliary hydraulic cylinder and for going here and there the auxiliary switch be located in corresponding separating brake control loop, auxiliary hydraulic cylinder has the piston rod that axis extends in left-right direction, auxiliary switch has moving knife and quiet cutter, it is characterized in that: moving knife is connected with can the drive link be placed on the right side of described piston rod of rectilinear motion in left-right direction, the left end of drive link have for coordinate with described piston rod right-hand member pushing tow with at drive link towards the forced section driving moving knife when moving right, quiet cutter closes a floodgate.
2. time-delay mechanism according to claim 1, is characterized in that: described auxiliary switch is by the right-hand member of Bracket setting in described auxiliary hydraulic cylinder.
3. time-delay mechanism according to claim 1 and 2, is characterized in that: described auxiliary switch is a sensitive switch.
4. hydraulic actuating mechanism, comprise time-delay mechanism and separating brake control loop, time-delay mechanism comprises auxiliary hydraulic cylinder and goes here and there the auxiliary switch be located in described separating brake control loop, auxiliary hydraulic cylinder has the piston rod that axis extends in left-right direction, auxiliary switch has moving knife and quiet cutter, it is characterized in that: moving knife is connected with can the drive link be placed on the right side of described piston rod of rectilinear motion in left-right direction, the left end of drive link have for coordinate with described piston rod right-hand member pushing tow with at drive link towards the forced section driving moving knife when moving right, quiet cutter closes a floodgate.
5. hydraulic actuating mechanism according to claim 4, is characterized in that: described auxiliary switch is by the right-hand member of Bracket setting in described auxiliary hydraulic cylinder.
6. hydraulic actuating mechanism according to claim 4, is characterized in that: described auxiliary switch is a sensitive switch.
7. the hydraulic actuating mechanism according to claim 4 ~ 6 any one, it is characterized in that: hydraulic actuating mechanism also comprises hydraulic circuit and divide-shut brake hydraulic cylinder, the oil pump that hydraulic circuit comprises fuel tank and is connected with described fuel tank, auxiliary hydraulic cylinder is connected with the oil-out of oil pump by the first oil circuit be arranged in parallel with the rod chamber of divide-shut brake hydraulic cylinder, auxiliary hydraulic cylinder, the rodless cavity of divide-shut brake hydraulic cylinder is connected by the second oil circuit be arranged in parallel, described second oil circuit be connected with auxiliary hydraulic cylinder is gone here and there and is provided with choke valve, separating brake control loop comprises and is arranged at the second oil circuit, two-bit triplet reversal valve between first oil circuit and fuel tank.
8. circuit breaker, comprise hydraulic actuating mechanism, hydraulic actuating mechanism comprises time-delay mechanism and separating brake control loop, time-delay mechanism comprises auxiliary hydraulic cylinder and goes here and there the auxiliary switch established in described separating brake control loop, auxiliary hydraulic cylinder has the piston rod be placed on the right side of described piston rod that axis extends in left-right direction, auxiliary switch has moving knife and quiet cutter, it is characterized in that: moving knife is connected with can the drive link of rectilinear motion in left-right direction, the left end of drive link has for coordinating to drive moving knife at drive link towards when moving right with described piston rod right-hand member pushing tow, the forced section that quiet cutter closes a floodgate.
9. circuit breaker according to claim 8, is characterized in that: described auxiliary switch is a sensitive switch.
10. circuit breaker according to claim 8 or claim 9, it is characterized in that: hydraulic actuating mechanism also comprises hydraulic circuit and divide-shut brake hydraulic cylinder, the oil pump that hydraulic circuit comprises fuel tank and is connected with described fuel tank, auxiliary hydraulic cylinder is connected with the oil-out of oil pump by the first oil circuit be arranged in parallel with the rod chamber of divide-shut brake hydraulic cylinder, auxiliary hydraulic cylinder, the rodless cavity of divide-shut brake hydraulic cylinder is connected by the second oil circuit be arranged in parallel, described second oil circuit be connected with auxiliary hydraulic cylinder is gone here and there and is provided with choke valve, separating brake control loop comprises and is arranged at the second oil circuit, two-bit triplet reversal valve between first oil circuit and fuel tank.
CN201410662208.XA 2014-11-20 2014-11-20 Time-delay mechanism and use hydraulic actuating mechanism and the chopper of this time-delay mechanism Active CN104319120B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019015163A1 (en) * 2017-07-20 2019-01-24 河南平高电气股份有限公司 Hydraulic operating mechanism and switch
CN110571107A (en) * 2019-07-25 2019-12-13 平高集团有限公司 Hydraulic operating mechanism and circuit breaker
CN110821902A (en) * 2019-10-15 2020-02-21 深圳供电局有限公司 Circuit breaker, hydraulic mechanism and low-voltage oil tank thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58180801A (en) * 1982-04-19 1983-10-22 Hitachi Ltd Oil pressure operating device for circuit breaker
JPS60257025A (en) * 1984-06-04 1985-12-18 三菱電機株式会社 Power switching device
JPS61225725A (en) * 1985-03-30 1986-10-07 株式会社東芝 Hydraulic operator for power breaker
CN1083967A (en) * 1993-07-29 1994-03-16 浙江大学 The hydraulic actuating mechanism of primary cut-out
US5419236A (en) * 1992-08-20 1995-05-30 Abb Patent Gmbh Method for controlling a hydraulic drive and configuration for carrying out the method
CN101290070A (en) * 2008-04-18 2008-10-22 沈阳工大电子工程有限公司 Electromagnetic hydraulic valve possessing self-defence capability
CN104143489A (en) * 2013-11-13 2014-11-12 国家电网公司 Signal cylinder and hydraulic operating mechanism with signal cylinder
CN204375590U (en) * 2014-11-20 2015-06-03 河南平高电气股份有限公司 A kind of time-delay mechanism and use hydraulic actuating mechanism and the circuit breaker of this time-delay mechanism

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58180801A (en) * 1982-04-19 1983-10-22 Hitachi Ltd Oil pressure operating device for circuit breaker
JPS60257025A (en) * 1984-06-04 1985-12-18 三菱電機株式会社 Power switching device
JPS61225725A (en) * 1985-03-30 1986-10-07 株式会社東芝 Hydraulic operator for power breaker
US5419236A (en) * 1992-08-20 1995-05-30 Abb Patent Gmbh Method for controlling a hydraulic drive and configuration for carrying out the method
CN1083967A (en) * 1993-07-29 1994-03-16 浙江大学 The hydraulic actuating mechanism of primary cut-out
CN101290070A (en) * 2008-04-18 2008-10-22 沈阳工大电子工程有限公司 Electromagnetic hydraulic valve possessing self-defence capability
CN104143489A (en) * 2013-11-13 2014-11-12 国家电网公司 Signal cylinder and hydraulic operating mechanism with signal cylinder
CN204375590U (en) * 2014-11-20 2015-06-03 河南平高电气股份有限公司 A kind of time-delay mechanism and use hydraulic actuating mechanism and the circuit breaker of this time-delay mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019015163A1 (en) * 2017-07-20 2019-01-24 河南平高电气股份有限公司 Hydraulic operating mechanism and switch
CN110571107A (en) * 2019-07-25 2019-12-13 平高集团有限公司 Hydraulic operating mechanism and circuit breaker
CN110571107B (en) * 2019-07-25 2021-07-23 平高集团有限公司 Hydraulic operating mechanism and circuit breaker
CN110821902A (en) * 2019-10-15 2020-02-21 深圳供电局有限公司 Circuit breaker, hydraulic mechanism and low-voltage oil tank thereof

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