CN105206439A - Pneumatic operating mechanism and locomotive high-voltage switch adopting same - Google Patents
Pneumatic operating mechanism and locomotive high-voltage switch adopting same Download PDFInfo
- Publication number
- CN105206439A CN105206439A CN201510647619.6A CN201510647619A CN105206439A CN 105206439 A CN105206439 A CN 105206439A CN 201510647619 A CN201510647619 A CN 201510647619A CN 105206439 A CN105206439 A CN 105206439A
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- Prior art keywords
- boss
- slot
- piston
- face
- gas outlet
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/24—Power arrangements internal to the switch for operating the driving mechanism using pneumatic or hydraulic actuator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
- H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
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- Actuator (AREA)
Abstract
The invention discloses a pneumatic operating mechanism and a locomotive high-voltage switch adopting the same. The pneumatic operating mechanism comprises a cylinder and closed parts arranged at the two ends of the cylinder. A piston is movably assembled in the cylinder in a guided mode in the axial direction. The end, opposite to the piston, of at least one of the two closed parts is provided with a boss and an inserting groove correspondingly. The boss and the inserting groove have inserting and sleeving positions of mutual inserting and sleeving matching in the axial moving stroke of the piston. An operating cavity located between the end face of the boss and the groove bottom face of the inserting groove is formed when the boss and the inserting groove are located at the inserting and sleeving positions, and operating holes are formed in the portions, where the boss or the inserting groove is located, of the closed parts. When the boss and the inserting groove are located at the inserting and sleeving positions, operating gas is introduced from the operating holes, and acts on the end face of the boss and the bottom face of the inserting groove until the boss is retreated from the inserting groove relatively and completely, at the moment, the operating gas introduced from the operating holes acts on the whole end face of the piston, and the moving speed of the piston in the cylinder is increased so as to reduce the initial moving speed of the piston.
Description
Technical field
The present invention relates to a kind of pneumatic operator and use the locomotive high-voltage switch gear of this pneumatic operator.
Background technology
At present, at locomotive vehicle-mounted equipment and other special occasions, pneumatic operator application is comparatively extensive, and pneumatic mechanism has structure simply, and mechanical endurance is long, convenient for installation and maintenance, and gas aboundresources, pollution-free.If the Chinese patent literature CN102903546B(day for announcing is on December 31st, 2014) disclosed " pneumatic operating mechanism made by a kind of combustion type direct force elevated pressure switch ", comprise upper end closed, the cylindrical shell of lower ending opening, the lower end of cylindrical shell is fixed with the end cap sealed up by cylindrical shell lower end nozzle, and on end cap and cylindrical shell, blind end offers inflation inlet respectively, the barrel of cylindrical shell offers exhaust outlet, in cylindrical shell, coaxial guiding movement is equipped with piston, piston is fixed with the output shaft passed from cylindrical shell upper end, with by piston by the lumen segmentation of cylindrical shell for rod chamber and rodless cavity.In use, this common pneumatic operator has that closing speed is large, just wayward, the separating brake overshoot of sum velocity and the larger shortcoming of bounce-back, the high voltage vacuum interrupter machinery that these shortcomings can cause coordinating with it and electrical endurance reduce, and are difficult to reach the undue relative long-life demand of switch of locomotive.
Summary of the invention
The object of this invention is to provide a kind of pneumatic operator, be intended to solve pneumatic divide-shut brake action in prior art in the excessive problem of the impulsive force of initial period.Meanwhile, present invention also offers a kind of locomotive high-voltage switch gear using this pneumatic operator.
In order to realize above object, in the present invention, the technical scheme of pneumatic operator is as follows:
Pneumatic operator, comprise the closure of cylindrical shell and two ends setting thereof, in cylindrical shell, guiding movement is equipped with piston vertically, in two closure, at least one correspondingly with on the opposite end of piston is provided with boss and slot, boss has the sleeve position of mutual sleeve cooperation and the disengaging position of relative disengagement with slot moving axially in stroke of piston, there is when being in sleeve position between boss and slot the operating cavity be between the end face of boss and the groove bottom of slot, and in the closure residing for boss or slot, offer the handle hole being communicated with operating cavity, the outer end of handle hole is for being communicated with extraneous gas circuit.
Slot is from bottom land to the cone tank of notch enlarged open or step groove, and when sleeve position, the part except operating cavity and the boss of the slot complementary sleeve that coincide coordinates.
Boss offers the air guide channel extending to outer peripheral face from end face, the air inlet of air guide channel is on the end face of boss, gas outlet is on the outer peripheral face of boss.
Air guide channel has along the axially extended grooved gas outlet of cylindrical shell.
There is more than two-stage the gas outlet of air guide channel arranges at the axially interval of boss.
Air guide channel has two or more and interval is arranged in the circumference of boss, and each gas outlet of same air guide channel is communicated with on same air inlet by the air flue in boss.
The gas outlets at different levels of air guide channel are the first gas outlet be on the outer peripheral face of boss root and the second gas outlet be between the first gas outlet and the end face of boss, and the aperture area of the first gas outlet is less than the aperture area of the second gas outlet.
The outer peripheral face of boss is fixed with the sealing ring be between the gas outlet of air guide channel and the end face of boss, the outer peripheral face of boss is sealed and matched when being in sleeve position, by the trough wall surface side face of sealing ring and slot, leads vertically with the trough wall surface of slot and coordinate in the periphery of sealing ring.
The cell wall of slot offers point pore on the end face that bottom land extends to residing for notch, the air inlet of point pore to be in the trough wall surface of slot or groove bottom and to be communicated with operating cavity when slot is in sleeve position, and the gas outlet of point pore is on the end face of notch periphery of slot.
In the present invention, the technical scheme of locomotive high-voltage switch gear is as follows:
Locomotive high-voltage switch gear, comprise the pneumatic operator of moving contact and upper driving connection thereof, pneumatic operator comprises the closure of cylindrical shell and two ends setting thereof, in cylindrical shell, guiding movement is equipped with piston vertically, in two closure, at least one correspondingly with on the opposite end of piston is provided with boss and slot, boss has the sleeve position of mutual sleeve cooperation and the disengaging position of relative disengagement with slot moving axially in stroke of piston, there is when being in sleeve position between boss and slot the operating cavity be between the end face of boss and the groove bottom of slot, and in the closure residing for boss or slot, offer the handle hole being communicated with operating cavity, the outer end of handle hole is for being communicated with extraneous gas circuit.
In the present invention piston when be close to two closure one of them, boss and slot will be in sleeve position, now by being filled with operating gas from handle hole, operating gas enters operating cavity from handle hole, and act in the end face of boss and the groove bottom of slot, until relative complete of boss exits from slot, the operating gas be now filled with from handle hole will act on the whole end face of piston, accelerate the translational speed of piston in cylindrical shell, until complete separating brake or combined floodgate, therefore the present invention is by reducing the lifting surface area of piston when opening mobile, to reduce the speed of piston initial movable, solve pneumatic divide-shut brake action in prior art in the excessive problem of the impulsive force of initial period.Meanwhile, when boss and slot move in opposite directions, along with boss starts to insert in slot, pressure power suffered by operating gas also reduces thereupon, the air displacement of operating gas is reduced, and air flue in operating cavity is similar to the cushioning effect of air spring by operating gas, avoids piston to occur overshooting problem.
Accompanying drawing explanation
Fig. 1 is the structural representation of operating mechanism when open position in embodiments of the invention 1;
Fig. 2 is the structural representation of operating mechanism in making process in Fig. 1;
Fig. 3 is the structural representation of piston in Fig. 1;
Fig. 4 is the structural representation of piston in embodiments of the invention 2;
Fig. 5 is the structural representation of piston in embodiments of the invention 3;
Fig. 6 is the structural representation of bottom end cover in embodiments of the invention 4.
Embodiment
The embodiment 1 of pneumatic operator in the present invention: as shown in Figure 1 to Figure 3, this operating mechanism is a kind of operating mechanism of adjustable force value characteristic, comprise the cylindrical shell 2 of downward-extension, the two ends up and down of cylindrical shell 2 are respectively equipped with closure, two closure are made up of the upper end cover 1 be fixed on the port of cylindrical shell 2 and bottom end cover 5 respectively, and in cylindrical shell 2 along the vertical direction guiding movement be equipped with piston 4, piston 4 is coaxially fixed with the output shaft 3 at the center being installed on upper end cover 1, output shaft 3 along the vertical direction guiding movement is installed on upper end cover 1, the lumen segmentation of cylindrical shell 2 is the rod chamber be in above piston 4 and the rodless cavity be in below piston 4 by output shaft 3.The lower surface of piston 4 is convexly equipped with coaxially arranged boss 41, the upper surface of bottom end cover 5 offers coaxially arranged slot 52, the height of the depth ratio boss 41 of slot 52 is large, after on the upper surface being close to bottom end cover 5 like this at piston 4, boss 41 can insert the part of the close notch of slot 52, to form operating cavity 6 at the end face of boss 41 and the groove bottom of slot 52, namely boss 41 has the sleeve position of mutual sleeve cooperation and the disengaging position of relative disengagement with slot 52 moving axially in stroke of piston 4, there is when being in sleeve position between boss 41 and slot 52 operating cavity 6 between the end face being in boss 41 and the groove bottom of slot 52, and the trough wall surface matched in clearance of the outer peripheral face of boss 41 and slot 52.Bottom end cover 5 offers lower handle hole 51, the inner aperture of lower handle hole 51 is on the trough wall surface of slot 52, aperture, outer end is on the outer peripheral face of bottom end cover 5, the outer end of lower handle hole 51 is for being communicated with extraneous gas circuit, to be in sleeve position at boss 41 and slot 52, bottom end cover 5 is communicated with extraneous gas circuit and operating cavity 6 by this lower handle hole 51.Upper end cover 1 offers the upper handle hole 11 being communicated with rod chamber and extraneous gas circuit.
In the present embodiment, the making process of operating mechanism is: as shown in Figure 1, pneumatic operator is in open position, after actuating system is to operating mechanism switching signal, electromagnetically operated valve is opened, gas enters operating cavity 6 from the bottom end cover 5 of operating mechanism, initial leading stressed cross section is the boss 41 on piston 4, now the stressed cross section of piston 4 is less, starting impetus and acceleration less, when gas pressure overcomes cylinder load force value, piston 4 and output shaft 3 start to move upward, on piston 4 lower surface and bottom end cover 5, plane forms gap, now a small amount of gas enters in cylindrical shell 2 by the fit clearance between piston 4 and bottom end cover 5, because the initial gas entering cylindrical shell 2 is less, air pressure in cylindrical shell 2 is lower, therefore the pressure born primarily of the boss 41 on piston 4 at the power of the initial LAP closed a floodgate provides.When boss 41 departs from the upper surface of bottom end cover 5, piston 4 lifting surface area under nominal pressure increases sharply, and output force value is increased sharply.Finally reach and do not change final power output, reduce initial power output object.
In the present embodiment, the separating brake process of operating mechanism is: when mechanism is in "on" position, operating system is to after electromagnetically operated valve sub-gate signal, electromagnetically operated valve can make the Exhaust Open of cylinder bottom, piston 4 is subject to load force or gas pressure starts to move to open position, at the initial LAP of piston 4 separating brake motion, gas is discharged by lower handle hole 51 completely, and opening velocity is very fast; After the boss 41 on piston 4 enters the slot 52 of bottom end cover 5, gas between the lower ring end face of piston 4 and the pressed on ring end face of bottom end cover 5 can only be discharged by the close gap between slot 52 and boss 41, because air displacement is less, cylinder opening velocity reduces rapidly, until gas is discharged completely.This splitting lock cushioning original position highly can set according to the boss 41 on piston 4, and buffering effect can regulate with the fit clearance of boss 41 by changing slot 52.This cushioning effect can reduce even to eliminate separating brake bounce-back and overshoot.
The embodiment 2 of pneumatic operator in the present invention: as shown in Figure 4, the difference of the present embodiment and embodiment 1 is, boss 214 is the butt frustum narrowed gradually from top to bottom, slot on corresponding bottom end cover is also the cone tank broadened gradually upward to notch from bottom land, and when sleeve position, the part except operating cavity except of slot and boss 214 sleeve that coincide complementation coordinates.In addition, this cone tank also can the same wide under step groove replace.
In the present embodiment, the making process of operating mechanism is: main process is identical with operating mechanism in embodiment 1, but because the outer peripheral face of the boss 214 of piston 204 is the conical surface, along with piston 204 moves upward, in cylindrical shell, air inflow increases gradually, therefore the gas pressure that is subject to of piston 204 is also large from little change in making process, finally reach and do not change final power output, thus reduce initial power output.
Separating brake process is: main process is identical with operating mechanism in embodiment 1, after boss 214 just below piston 204 enters the slot of bottom end cover, outer peripheral face due to boss 214 is the conical surface, in cylindrical shell, gas is discharged along with piston 204 moves downward and air displacement reduces gradually, finally plays certain cushioning effect.
The embodiment 3 of pneumatic operator in the present invention: as shown in Figure 5, the difference of the present embodiment and embodiment 1 is, boss 314 offer multiple at circumference air guide channel uniformly at intervals, the structure of each air guide channel is identical, include the vertical gas port 324 extended, the aperture, lower end of gas port 324 is the air inlet 334 be on the ring end face of boss 314, be provided with between the wall surface of the hole of gas port 324 and the outer peripheral face of boss 314 two-stage between the upper and lower every gas outlet, two gas outlets are communicated with on same air inlet 334 by gas port 324, wherein one-level gas outlet 344 is in the root of boss 314, secondary gas outlet 354 is under one-level gas outlet 344, secondary gas outlet 354 is the grooved gas outlet of upper downward-extension, and the aperture area of the open area ratio one-level gas outlet 344 of secondary gas outlet 354 is large.The outer peripheral face of boss 314 is gone back buckle and be set with the sealing ring 364 be under secondary gas outlet 354, sealing ring 364 makes boss 314 when being in sleeve position and the trough wall surface side face of slot is sealed and matched, and the periphery of sealing ring 364 and the trough wall surface of slot are slidably matched along the vertical direction.In addition, one-level gas outlet 344 and secondary gas outlet 354 both can adopt grooved mouth, the groove that such as or circumference axial along boss 314 extends; Also orifice structure can be adopted, as circular hole, long kidney-shaped hole etc.
In the present embodiment, operating mechanism is when closing a floodgate, and piston 304 relies on the mode of adding air guide channel to change the power producing characteristics of operating mechanism in making process.Boss 314 and slot seal and are slidably matched.After actuating system is to operating mechanism switching signal, electromagnetically operated valve is opened, gas enters in slot from the bottom end cover of operating mechanism, initial leading stressed cross section is the boss 314 on piston 304, now the stressed cross section of piston 304 is less, starting impetus and acceleration less, when gas pressure overcomes cylinder load force value, piston 304 and output shaft start to move upward, the lower surface of piston 304 and the formation gap, upper surface of bottom end cover, now a small amount of gas enters in cylindrical shell by piston 304 one-level gas outlet 344, because the size of one-level gas outlet 344 is less, the gas entering cylindrical shell is less, air pressure is lower, therefore mainly contain at the power of initial LAP closed a floodgate the gas pressure that piston 304 convex platform 314 bears to provide, when lower end cover upper planar surface is exposed in the secondary gas outlet 354 of piston 304, piston 304 lifting surface area under nominal pressure increases sharply, output force value is increased sharply.Finally reach and do not change final power output, reduce initial power output object.
When operating mechanism is in "on" position, operating system is to after electromagnetically operated valve sub-gate signal, electromagnetically operated valve can make lower handle hole open, piston 304 is subject to load force or gas pressure starts to move to open position, at the initial LAP of piston 304 separating brake motion, gas in cylindrical shell is discharged jointly by one-level gas outlet 344 and secondary gas outlet 354, opening velocity is very fast, bottom end cover is sunk to gradually in secondary gas outlet 354 on piston 304, extraction flow is reducing gradually, opening velocity not easily increases too fast, when secondary gas outlet 354 is sunk in slot completely, gas in cylindrical shell is discharged primarily of one-level gas outlet 344, because the size of one-level gas outlet 344 reduces, opening velocity reduces rapidly, until open position.This splitting lock cushioning original position, effect can regulate according to the air guide channel desired location on piston 304 and size.This cushioning effect can reduce even to eliminate separating brake bounce-back and overshoot equally.
The embodiment 4 of pneumatic operator in the present invention: as shown in Figure 6, the difference of the present embodiment and embodiment 1 is, bottom end cover 405 offers point pore 425 of L shape, in the trough wall surface that the aperture, lower end of point pore 425 is in slot 415 or groove bottom, to be communicated with operating cavity when slot 415 is in sleeve position, the aperture, upper end of point pore 425 is on the ring end face of bottom end cover 405 end face of the notch periphery of slot 415 (i.e. on).In divide-shut brake process, the effect acting on one-level gas outlet in embodiment 3 of point pore 425 is identical.
In the above-described embodiments, only on bottom end cover, offer slot, corresponding also only at the lower end projection boss of piston, in other embodiments, upper end cover also can offer slot, the upper end of corresponding piston needs projection boss, and the now flexible action of operating mechanism in divide-shut brake process will be more soft slow.In addition, the position of boss and slot also can be replaced mutually, and namely boss also can be on end cap, and corresponding slot is on piston.
The embodiment of locomotive high-voltage switch gear in the present invention: comprise actuating system, operating mechanism and actuator, wherein actuating system is by valve and gas circuit control operation mechanism action, and operating mechanism is in transmission connection and carries out divide-shut brake action on the moving contact of actuator, to control moving contact.The structure of actuating system and actuator all belongs to prior art, and the structure of operating mechanism is identical with the structure of operating mechanism in above-described embodiment.
Claims (10)
1. pneumatic operator, comprise the closure of cylindrical shell and two ends setting thereof, in cylindrical shell, guiding movement is equipped with piston vertically, it is characterized in that, in two closure, at least one correspondingly with on the opposite end of piston is provided with boss and slot, boss has the sleeve position of mutual sleeve cooperation and the disengaging position of relative disengagement with slot moving axially in stroke of piston, there is when being in sleeve position between boss and slot the operating cavity be between the end face of boss and the groove bottom of slot, and in the closure residing for boss or slot, offer the handle hole being communicated with operating cavity, the outer end of handle hole is for being communicated with extraneous gas circuit.
2. pneumatic operator according to claim 1, is characterized in that, slot is from bottom land to the cone tank of notch enlarged open or step groove, and when sleeve position, the part except operating cavity and the boss of the slot complementary sleeve that coincide coordinates.
3. pneumatic operator according to claim 1 and 2, is characterized in that, boss offers the air guide channel extending to outer peripheral face from end face, and the air inlet of air guide channel is on the end face of boss, gas outlet is on the outer peripheral face of boss.
4. pneumatic operator according to claim 3, is characterized in that, air guide channel has along the axially extended grooved gas outlet of cylindrical shell.
5. pneumatic operator according to claim 3, is characterized in that, there is more than two-stage the gas outlet of air guide channel arranges at the axially interval of boss.
6. pneumatic operator according to claim 5, is characterized in that, air guide channel has two or more and interval is arranged in the circumference of boss, and each gas outlet of same air guide channel is communicated with on same air inlet by the air flue in boss.
7. pneumatic operator according to claim 5, it is characterized in that, the gas outlets at different levels of air guide channel are the first gas outlet be on the outer peripheral face of boss root and the second gas outlet be between the first gas outlet and the end face of boss, and the aperture area of the first gas outlet is less than the aperture area of the second gas outlet.
8. pneumatic operator according to claim 3, it is characterized in that, the outer peripheral face of boss is fixed with the sealing ring be between the gas outlet of air guide channel and the end face of boss, the outer peripheral face of boss is sealed and matched when being in sleeve position, by the trough wall surface side face of sealing ring and slot, leads vertically with the trough wall surface of slot and coordinate in the periphery of sealing ring.
9. pneumatic operator according to claim 1 and 2, it is characterized in that, the cell wall of slot offers point pore on the end face that bottom land extends to residing for notch, the air inlet of point pore to be in the trough wall surface of slot or groove bottom and to be communicated with operating cavity when slot is in sleeve position, and the gas outlet of point pore is on the end face of notch periphery of slot.
10. locomotive high-voltage switch gear, comprise the pneumatic operator of moving contact and upper driving connection thereof, pneumatic operator comprises the closure of cylindrical shell and two ends setting thereof, in cylindrical shell, guiding movement is equipped with piston vertically, it is characterized in that, in two closure, at least one correspondingly with on the opposite end of piston is provided with boss and slot, boss has the sleeve position of mutual sleeve cooperation and the disengaging position of relative disengagement with slot moving axially in stroke of piston, there is when being in sleeve position between boss and slot the operating cavity be between the end face of boss and the groove bottom of slot, and in the closure residing for boss or slot, offer the handle hole being communicated with operating cavity, the outer end of handle hole is for being communicated with extraneous gas circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510647619.6A CN105206439B (en) | 2015-10-09 | 2015-10-09 | A kind of pneumatic operator and the locomotive high-voltage switch gear using the operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510647619.6A CN105206439B (en) | 2015-10-09 | 2015-10-09 | A kind of pneumatic operator and the locomotive high-voltage switch gear using the operating mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105206439A true CN105206439A (en) | 2015-12-30 |
| CN105206439B CN105206439B (en) | 2019-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510647619.6A Expired - Fee Related CN105206439B (en) | 2015-10-09 | 2015-10-09 | A kind of pneumatic operator and the locomotive high-voltage switch gear using the operating mechanism |
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| CN (1) | CN105206439B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107316759A (en) * | 2017-07-19 | 2017-11-03 | 西安交通大学 | A kind of gas cushioning features for electromagnetic repulsion force operating mechanism |
| CN109669111A (en) * | 2017-10-13 | 2019-04-23 | 中国石油天然气股份有限公司 | A kind of transformer oil degassing dehydration device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877465A (en) * | 1996-09-23 | 1999-03-02 | Gec Alsthom T & D Sa | High-tension circuit-breaker with damper |
| CN201845669U (en) * | 2010-09-17 | 2011-05-25 | 平高集团有限公司 | Oil buffer and breaker using same |
| CN102903546A (en) * | 2012-10-22 | 2013-01-30 | 中国航天科技集团公司第四研究院第四十一所 | Actuation operation mechanism of fuel type direct force acting high-voltage switch |
-
2015
- 2015-10-09 CN CN201510647619.6A patent/CN105206439B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877465A (en) * | 1996-09-23 | 1999-03-02 | Gec Alsthom T & D Sa | High-tension circuit-breaker with damper |
| CN201845669U (en) * | 2010-09-17 | 2011-05-25 | 平高集团有限公司 | Oil buffer and breaker using same |
| CN102903546A (en) * | 2012-10-22 | 2013-01-30 | 中国航天科技集团公司第四研究院第四十一所 | Actuation operation mechanism of fuel type direct force acting high-voltage switch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107316759A (en) * | 2017-07-19 | 2017-11-03 | 西安交通大学 | A kind of gas cushioning features for electromagnetic repulsion force operating mechanism |
| CN107316759B (en) * | 2017-07-19 | 2019-07-19 | 西安交通大学 | A kind of gas buffer structure for electromagnetic repulsion force operating mechanism |
| CN109669111A (en) * | 2017-10-13 | 2019-04-23 | 中国石油天然气股份有限公司 | A kind of transformer oil degassing dehydration device |
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| Publication number | Publication date |
|---|---|
| CN105206439B (en) | 2019-01-25 |
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