CN109764152A - A hydraulic operating mechanism and its hydraulic control valve - Google Patents
A hydraulic operating mechanism and its hydraulic control valve Download PDFInfo
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- CN109764152A CN109764152A CN201811558042.1A CN201811558042A CN109764152A CN 109764152 A CN109764152 A CN 109764152A CN 201811558042 A CN201811558042 A CN 201811558042A CN 109764152 A CN109764152 A CN 109764152A
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Abstract
本发明提供了一种液压操动机构及其液压控制阀，本发明的液压操动机构，包括液压缸和液压控制阀,液压控制阀包括阀体和阀套，阀套内装配有阀芯，阀芯在液压控制阀处于分闸位置时用于将高压油腔和低压油腔连通以及在液压控制阀处于合闸位置时用于将高压油腔和液压缸油腔连通，阀套内设有控制腔，控制腔内装配有顶推块，液压控制阀还包括驱动件，阀套或阀座上设有穿孔，驱动件具有操作端。在进行慢合操作时，通过顶推块、驱动件将阀芯由分闸位置推向合闸位置，稳定可靠，有效避免了在对断路器进行慢合操作时液压控制阀在液压系统较低的压力作用下由分闸位置到合闸位置不能转换到位的现象的发生，提高了调试时的工作效率。
The present invention provides a hydraulic operating mechanism and a hydraulic control valve thereof. The hydraulic operating mechanism of the present invention includes a hydraulic cylinder and a hydraulic control valve. The hydraulic control valve includes a valve body and a valve sleeve. The valve sleeve is equipped with a valve core. The valve core is used to connect the high-pressure oil chamber and the low-pressure oil chamber when the hydraulic control valve is in the opening position, and is used to connect the high-pressure oil chamber and the hydraulic cylinder oil chamber when the hydraulic control valve is in the closing position. The control cavity is equipped with a push block, and the hydraulic control valve also includes a driving part, a valve sleeve or a valve seat is provided with a perforation, and the driving part has an operating end. During the slow closing operation, the spool is pushed from the opening position to the closing position through the push block and the driving member, which is stable and reliable, and effectively avoids the hydraulic control valve being low in the hydraulic system during the slow closing operation of the circuit breaker. Under the action of pressure, the phenomenon that the switch from the opening position to the closing position cannot be converted into place occurs, which improves the work efficiency during debugging.
Description
Technical field
The present invention relates to hydraulic actuating mechanism and its field of hydraulic control.
Background technique
Hydraulic actuating mechanism is the mechanism for driving breaker body to realize separating brake, combined floodgate, and hydraulic control valve is then hydraulic
The core component of operating mechanism, by hydraulic control valve control hydraulic actuating mechanism drive breaker body realization separating brake,
It closes a floodgate.
For example, the Chinese utility model patent that Authorization Notice No. is CN204851819U discloses a kind of control valve and use
The breaker hydraulic actuating mechanism of the control valve.The device includes valve seat, the valve pocket being set in valve seat, is set in valve pocket
Spool, spool can be moved back and forth along the axis direction of valve pocket.Control chamber, high-voltage oil cavity, instantaneous is equipped between valve pocket and valve seat
High-voltage oil cavity and low pressure oil pocket are wherein high pressure oil in high-voltage oil cavity, are high pressures in breaker closing in instantaneous high pressure oil pocket
Oil is low pressure oil in breaker open operation, is low pressure oil in low pressure oil pocket.
And breaker in the prior art needs to carry out breaker slow closing operation in debugging process to measure breaker
When divide-shut brake open away from and the excess of stroke, slow closing operation be usually to carry out under the lower operating pressure of hydraulic system.At this point, due to
There are frictional force between the spool and valve pocket of hydraulic control valve, pressure is relatively low to be easy to cause hydraulic control valve to be difficult to convert in place,
It to make spool be in middle position, resettle hydraulic system pressure can not, only dismantling hydraulic control valve can just make spool
It is restored to open position or closing position, reduces working efficiency when debugging.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic actuating mechanisms, to solve to be closed slowly to breaker in the prior art
When operation, it is easy to appear hydraulic control valve and converts the work not in place when causing hydraulic system that can not resettle and reducing debugging
The technical issues of efficiency；Meanwhile the object of the invention is also to provide a kind of hydraulic actuating mechanism hydraulic control valves, to solve
In the prior art when carrying out slow closing operation to breaker, it is not in place to be easy to appear hydraulic control valve conversion, and causes hydraulic pressure system
The technical issues of system can not resettle.
To achieve the above object, hydraulic actuating mechanism of the invention is adopted the following technical scheme that with hydraulic control valve
Hydraulic actuating mechanism hydraulic control valve is slidingly sealed assembly in valve pocket including valve seat and the valve pocket being assemblied in valve seat
There is spool, the spool is used to for high-voltage oil cavity being connected to low pressure oil pocket when hydraulic control valve is in open position, Yi Ji
For high-voltage oil cavity to be connected to hydraulic cylinder oil pocket when hydraulic control valve is in closing position, control chamber is equipped in valve pocket, it is described
Slidably sealing is equipped with push block in control chamber, the hydraulic control valve further include for drive push block pushing tow spool by
The open position actuator mobile to closing position, the valve pocket or valve seat are equipped with the perforation installed for the actuator, institute
Stating actuator has the operating side being arranged in outside hydraulic control valve.
Hydraulic actuating mechanism of the invention, when carrying out slow closing operation, is incited somebody to action with hydraulic control valve by push block, actuator
Spool pushes closing position to by open position, reliable and stable, effectively prevents the hydraulic control when carrying out slow closing operation to breaker
The generation for the phenomenon that valve processed cannot be converted in place under the lower pressure effect of hydraulic system by open position to closing position, mentions
Working efficiency when high debugging.
Further, in order to keep the structure of actuator simple, the perforation is the threaded hole being arranged on valve seat, the drive
Moving part is adjusting bolt of the Screw assembly in threaded hole, and the bolt head for adjusting bolt constitutes operating side.
Further, in order to be able to maintain spool in sub-gate position or closing position, the spool is located at the end in control chamber
There is separating brake to keep limiting section and close a floodgate to keep limiting section in portion, is equipped in the valve seat for limiting respectively with corresponding limiting section
Cooperation is so that spool is maintained at the elastic spacing component of open position or closing position.
Further, in order to which the structure for the end for being located at spool in control chamber is simple, the spool is located in control chamber
End be shuttle shape rotary structure, the separating brake keeps limiting section and closes a floodgate that limiting section is kept to be separately positioned on shuttle shape revolving body
Structure is along its two axial annular slope.
Further, in order to keep the structure of elastic spacing component simple, the elastic spacing component includes being securely fitted in
Fixing seat and mobilizable limited block being assemblied in fixing seat to cooperate with the limit of corresponding limiting section in valve pocket, the limit
It is equipped between position block and fixing seat for driving the movable elastic component of limited block.
To achieve the above object, hydraulic actuating mechanism of the invention adopts the following technical scheme that
Hydraulic actuating mechanism, including the hydraulic control valve that hydraulic cylinder and driving hydraulic cylinder act, the hydraulic control valve includes valve
Seat and the valve pocket that is assemblied in valve seat are slidingly sealed in valve pocket and are equipped with spool, and the spool is in separating brake in hydraulic control valve
For being connected to high-voltage oil cavity with low pressure oil pocket and being used for when hydraulic control valve is in closing position by high pressure oil when position
Chamber is connected to hydraulic cylinder oil pocket, and control chamber is equipped in valve pocket, slidably seals in the control chamber and is equipped with push block, described
Hydraulic control valve further includes the actuator for driving push block pushing tow spool mobile to closing position from open position, the valve
Set or valve seat are equipped with the perforation installed for the actuator, and the actuator has the operation being arranged in outside hydraulic control valve
End.
Hydraulic actuating mechanism of the invention can pass through push block, actuator for spool by separating brake when carrying out slow closing operation
Position pushes closing position to, reliable and stable, effectively prevent carrying out when slow closing operation hydraulic control valve only in the work of hydraulic system
The generation for the phenomenon that cannot being converted in place under by open position to closing position, influences working efficiency.
Further, in order to keep the structure of actuator simple, the perforation is the threaded hole being arranged on valve seat, the drive
Moving part is adjusting bolt of the Screw assembly in threaded hole, and the bolt head for adjusting bolt constitutes operating side.
Further, in order to be able to maintain spool in sub-gate position or closing position, the spool is located at the end in control chamber
There is separating brake to keep limiting section and close a floodgate to keep limiting section in portion, is equipped in the valve seat for limiting respectively with corresponding limiting section
Cooperation is so that spool is maintained at the elastic spacing component of open position or closing position.
Further, in order to which the structure for the end for being located at spool in control chamber is simple, the spool is located in control chamber
End be shuttle shape rotary structure, the separating brake keeps limiting section and closes a floodgate that limiting section is kept to be separately positioned on shuttle shape revolving body
Structure is along its two axial annular slope.
Further, in order to keep the structure of elastic spacing component simple, the elastic spacing component includes being securely fitted in
Fixing seat and mobilizable limited block being assemblied in fixing seat to cooperate with the limit of corresponding limiting section in valve pocket, the limit
It is equipped between position block and fixing seat for driving the movable elastic component of limited block.
Detailed description of the invention
Fig. 1 is in structural representation when closing position for the hydraulic control valve of the embodiment of hydraulic actuating mechanism of the invention
Figure；
Fig. 2 is in structural schematic diagram when open position for the hydraulic control valve of the embodiment of hydraulic actuating mechanism of the invention.
In figure: 1, the first oil circuit；2, the second oil circuit；3, third oil circuit；4, the 4th oil circuit；5, the 5th oil circuit；51, the 6th oil
Road；6, level-one separating brake valve；7, second level separating brake valve；8, level-one combined floodgate valve；9, second level combined floodgate valve；11, shell portion；12, low pressure chamber
Valve pocket；121, high pressure chest valve pocket；13, aperture screw；14, spool；15, elastic spacing component；16, push block；17, spiral shell is adjusted
Bolt；18, long hole；19, inclined hole；20, radially installed hole；21, right end cap；211, left end cap；22, low pressure oil pocket；23, high pressure oil
Chamber；24, hydraulic cylinder oil pocket；25, combined floodgate valve mounting hole；26, control chamber；27, first through hole；28, annular space；29, third through-hole；
30, large aperture section；31, small-bore section；32, tail portion；33, the body of rod；34, middle part；35, low pressure holding meanss；36, left sealed taper
Face；37, right sealing cone.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.
The embodiment of hydraulic actuating mechanism of the invention, as depicted in figs. 1 and 2, the hydraulic actuating mechanism include hydraulic cylinder
With the hydraulic control valve of driving hydraulic cylinder movement.Hydraulic control valve includes valve seat and the valve pocket that is assemblied in valve seat, is led in valve pocket
Spool 14 is equipped with to being slidingly sealed.
As shown in Figure 1, valve seat includes 211 part of shell portion 11,21 part of right end cap and left end cap, shell portion 11
Lower side tube-wall on be disposed with low pressure oil pocket 22 for being connected to low-pressure reservoir (not shown) from left to right, be used for
Hydraulic cylinder oil pocket 24, the height for being connected to high-pressure hydraulic (not shown) being connected to hydraulic cylinder (not shown)
Pumping cavity 23, wherein hydraulic cylinder oil pocket 24 is the instantaneous high pressure oil pocket in background technique.Along axial direction on the barrel of shell portion 11
It is provided with the second oil circuit 2, level-one separating brake valve 6 is provided on the left end outer peripheral surface of shell portion 11, in shell portion 11 corresponding one
The radially installed hole 20 of radial perforation barrel, radially installed hole 20 and second are additionally provided on the barrel of the position of fraction gate valve 6
The intersection of oil circuit 2 communicates.Two for being connected to or closing with low pressure oil pocket 22 for controlling the second oil circuit 2 are installed in radially installed hole 20
Fraction gate valve 7.Level-one separating brake valve 6 can control the open and close of second level separating brake valve 7.It is also set up on the right end barrel of shell portion 11
There is the first oil circuit 1, without intersecting between the first oil circuit 1 and the second oil circuit 2.Level-one conjunction is provided on the right end outer wall of shell portion 11
Gate valve 8 is additionally provided with the combined floodgate valve peace of radial perforation barrel on the barrel of the position of the corresponding level-one combined floodgate valve 8 of shell portion 11
Hole 25 is filled, is equipped in combined floodgate valve mounting hole 25 and closes a floodgate for controlling the second level that the first oil circuit 1 is connected to or closes with control chamber 26
Valve 9.Wherein, level-one separating brake valve 6 and level-one combined floodgate valve 8 are pilot valve, and second level separating brake valve 7 and second level combined floodgate valve 9 are amplification
Valve.The middle position of shell portion 11 and aperture screw is additionally provided on 11 barrel of shell portion of the inside of the second oil circuit 2
13, aperture, the barrel chamber of the second oil circuit of connection 2 and shell portion 11 are provided on aperture screw 13.
Valve pocket includes the high pressure that the low pressure chamber valve pocket 12 being correspondingly arranged with low pressure oil pocket 22 and high-voltage oil cavity 23 are correspondingly arranged
Chamber valve pocket 121.Low pressure chamber valve pocket 12 and high pressure chest valve pocket 121 are assemblied in inside shell portion 11, and low pressure chamber valve pocket 12 assembles
It is moved right in the left end and cooperating with 11 block of shell portion of shell portion 11 with limiting it, the left end of low pressure chamber valve pocket 12 is set
The press fitting that is fixed is equipped in the left end cap 211 in shell portion 11.High pressure chest valve pocket 121 is assemblied in the right end of shell portion 11
And cooperate with 11 block of shell portion and moved downward with limiting it, the right end of high pressure chest valve pocket 121 is provided with the press fitting that is fixed
In the right end cap 21 in shell portion 11.Low pressure chamber valve pocket 12 be internally provided with along low pressure chamber valve pocket 12 it is axially extending for filling
The counterbore of dispensing spool 14, the left end pilot seal slidable fit of spool 14 is in the counterbore.High pressure chest valve pocket 121 is internally provided with
The accommodation space that is used to assemble spool 14 axially extending along high pressure chest valve pocket 121, the accommodation space are divided into large aperture section 30 again
With small-bore section 31.First of the radial perforation low pressure chamber valve pocket 12 along low pressure chamber valve pocket 12 is additionally provided on low pressure chamber valve pocket 12
Through-hole 27, first through hole 27 are oppositely arranged with low pressure oil pocket 22.It is provided on high pressure chest valve pocket 121 along high pressure chest valve pocket 121
The third through-hole 29 of radial perforation high pressure chest valve pocket 121, third through-hole 29 are oppositely arranged with high-voltage oil cavity 23.It is assemblied in barrel
There are gap on the axis direction of shell portion 11 between low pressure chamber valve pocket 12 and high pressure chest valve pocket 121 in points 11, should between
Gap forms annular space 28, and annular space 28 is oppositely arranged with hydraulic cylinder oil pocket 24.
14 shape approximation rod of spool, including tail portion 32, the body of rod 33, middle part 34 and the low pressure for being set to 33 front end of the body of rod
Holding meanss 35, the tail portion 32 of spool 14, which is slidingly sealed, to be assemblied in low pressure chamber valve pocket 12.The radial ruler of the tail portion 32 of spool 14
The radial dimension of the very little inner peripheral surface equal to low pressure chamber valve pocket 12, and it is greater than the radial dimension of the body of rod 33 of spool 14, tail portion 32
The inner surface pilot seal of outer peripheral surface and low pressure chamber valve pocket 12 is slidably matched, and 35 pilot seal of low pressure holding meanss is slidably matched dress
In small-bore section 31 assigned in high pressure chest valve pocket 121.The radial dimension of the left and right ends outer peripheral surface at middle part 34 respectively with low pressure chamber
Valve pocket 12 is equal with the radial dimension of the inner peripheral surface of high pressure chest valve pocket 121, the radial ruler of the outer peripheral surface of the middle section at middle part 34
The very little radial dimension greater than its both ends, and the both ends at middle part 34 are respectively equipped with sealing cone, so that spool 14 is in low pressure chamber valve
In set 12 when the guiding movement of left and right the sealing of the hole wall of sealing cone and annular space 28 can cooperate.Sealing cone includes left sealed taper
Face 36 and right sealing cone 37, when being moved to the left, the left side hole wall of annular space 28 and the left side at middle part 34 are close at the middle part 34 of spool 14
It seals the conical surface 36 and forms linear sealing, when moving right, the right side hole wall of annular space 28 and the formation line of right sealing cone 37 at middle part 34 are close
Envelope.The radial dimension of the body of rod 33 of spool 14 is equal with the radial dimension of small-bore section 31, and the body of rod 33 is led with small-bore section 31
It is slidably matched to sealing.Long hole 18 is additionally provided in spool 14, long hole 18 extends right up to middle part 34 from the left side of tail portion 32,
Inclined hole 19 is additionally provided on middle part 34, inclined hole 19 is connected to the space on 34 right side of long hole 18 and middle part.
Low pressure holding meanss 35 are located in control chamber 26, and low pressure holding meanss 35 are the thin shuttle shape revolving body in intermediate thick both ends
Structure has left end annular slope, right end annular slope, when in order to avoid hydraulic system pressure being zero, due to transporting or shaking
It is dynamic that the position of spool 14 is made to change, prevent hydraulic control valve in open position or closing position from reliably keeping.High pressure chest
It is additionally provided in valve pocket 121 and cooperates with low pressure holding meanss 35 so that spool 14 is maintained at the bullet of open position or closing position
Property limit assembly 15, elastic spacing component 15 are located at the lower section of low pressure holding meanss 35.Elastic spacing component 15 includes fixed dress
The limited block that can be up and down relative to fixing seat for fitting over the fixing seat in high pressure chest valve pocket 121 and being assemblied in fixing seat,
The limited block can be limited with corresponding limiting section to be cooperated.Spring, limited block and limiting section are equipped between limited block and fixing seat
One end end face of cooperation is curved surface.Specific fit system is, as shown in Figure 1, when hydraulic control valve be in closing position, it is elastic
Limit assembly 15 can right end annular slope to low pressure holding meanss 35 generate an axial force to the left, keep spool 14 reliable
It is maintained at closing position, the right end annular slope of low pressure holding meanss 35 forms combined floodgate and keeps limiting section.As shown in Fig. 2,
When hydraulic control valve is in open position, elastic spacing component 15 can left end annular slope to low pressure holding meanss 35 generate one
A axial force to the right, makes spool 14 reliably be maintained at open position, and the left end annular slope of low pressure holding meanss 35 is formed
Separating brake keeps limiting section.In other embodiments, switching on and off keeps limiting section that can also be formed by other structures, such as: ball
Other structures with radian such as face structure；Or left and right two annular grooves, elastic spacing are set in low pressure holding meanss
The limited block of component is limited with corresponding annular groove respectively to be cooperated.
The right end of shell portion 11 is provided with right end cap 21, and 21 screw-internal thread fit of right end cap, which has, adjusts bolt 17, adjusts spiral shell
Bolt 17 constitutes actuator, slidably seals in control chamber 26 and is equipped with push block 16, adjusts bolt 17 and push block 16 is solid
Fixed connection, the bolt head formation for adjusting bolt 17 are overhung at the operating side that the right side of right end cap 21 is operated for operator.In valve
When core 14 is in open position progress slow closing operation, the pressure of hydraulic system is reduced to zero first, is then threaded into and adjusts bolt 17,
It pushes spool 14 to move downward to closing position by push block 16, then screws out and adjust bolt 17, then slowly increase hydraulic
The pressure of system.Since the pressure of hydraulic system is slowly established, hydraulic cylinder just will drive breaker and carry out slow conjunction movement.If
Setting actuator can avoid the generation of hydraulic control valve conversion incomplete phenomena when low pressure.Actuator structure in the present apparatus is simple,
It is easy to operate.
As shown in Figure 1, hydraulic actuating mechanism of the invention is carrying out separating brake movement: level-one separating brake valve 6 in closing position
It opens, second level separating brake valve 7 is opened therewith, and the high pressure oil in the control chamber 26 of 14 right end of spool is through the second oil circuit 2, second level separating brake valve
7, first through hole 27, low pressure oil pocket 22 are discharged into low-pressure reservoir.While 26 pressure release of control chamber, work of the spool 14 in left end high pressure oil
It is moved right under to open position shown in Fig. 2.Wherein, the right side of the right sealing cone 37 Yu annular space 28 at the middle part 34 of spool 14
Hole wall sealing cooperation, so that the high pressure oil in high-voltage oil cavity 23 cannot be introduced into hydraulic cylinder oil pocket 24；Left sealing cone 36 and annular space
28 left side hole wall separation, so that low pressure oil pocket 22 is connected to hydraulic cylinder oil pocket 24, the high pressure oil in hydraulic cylinder oil pocket 24 passes through
5th oil circuit 5, low pressure oil pocket 22 are discharged into low-pressure reservoir, carry out separating brake movement.After the completion of separating brake movement, level-one separating brake valve 6 and two
Fraction gate valve 7, which resets, closes, hereafter if the valve port of second level combined floodgate valve 9 is not closed completely, in long-term work, high-voltage oil cavity 23
High pressure oil can slowly infiltrate through control chamber 26 by the valve port of the first oil circuit 1, second level combined floodgate valve 9, prevent spool 14 from reliable
It is maintained at open position, and the presence of the aperture on aperture screw 13 may make the high pressure oil for penetrating into control chamber 26 to pass through aperture
Screw 13, the 6th oil circuit 51 are discharged into low pressure oil pocket 22, to make to remain low-pressure state in control chamber 26, spool 14 can
By being maintained at open position.
As shown in Fig. 2, hydraulic actuating mechanism of the invention is carrying out feed motion: level-one combined floodgate valve 8 in open position
It opens, second level combined floodgate valve 9 is opened therewith, and the high pressure oil in high-voltage oil cavity 23 enters through the first oil circuit 1,9 valve port of second level combined floodgate valve
Control chamber 26 pushes spool 14 to move downward to closing position shown in Fig. 1, the left sealing cone 36 and ring at the middle part 34 of spool 14
The left side hole wall of sky 28 seals cooperation, so that low pressure oil pocket 22 is no longer connected to hydraulic cylinder oil pocket 24, the right sealed taper at middle part 34
Face 37 is separated with the right side hole wall of annular space 28, so that hydraulic cylinder oil pocket 24 is connected to high-voltage oil cavity 23, the height in high-voltage oil cavity 23
Pressure oil enters hydraulic cylinder oil pocket 24 by third oil circuit 3 and carries out feed motion.After the completion of feed motion, level-one combined floodgate valve 8 and two
Grade combined floodgate valve 9, which resets, closes, hereafter if the valve port of second level separating brake valve 7 is not closed completely, in long-term work, 14 right end of spool
High pressure oil in control chamber 26 can enter low pressure oil pocket 22 by the second oil circuit 2, second level separating brake valve 7, finally be discharged into low-pressure reservoir,
Reduce the oil pressure in control chamber 26, spool 14 cannot reliably be maintained at closing position.And aperture is deposited on aperture screw 13
High pressure oil in high-voltage oil cavity 23 is added in control chamber 26 by the 4th oil circuit 4, aperture screw 13, is making to control
High pressure conditions are remained in chamber 26 processed, so that spool 14 be made reliably to be maintained at closing position.Generally for enabling spool 14
It reliably is maintained at position switching on and off, the means of use are the machining smalls on valve pocket, and the structure for not only making valve pocket is arranged in this way
It is more complicated, and aperture is not only small but also deep not easy to be processed, and aperture is set on a screw in this programme, is processed on screw
Small structure is simple, easy to process, and the structure of valve pocket also becomes simple.
The other embodiments of hydraulic actuating mechanism of the invention and the difference of above-described embodiment be, can not also in valve pocket
Elastic spacing component is set, spool is horizontally disposed at this time, when spool is moved to closing position, open position, be not in because
Gravity bring involuntary maneuver.In other embodiments, spring may be replaced by other flexible elastic components, such as:
Leaf spring, rubber pad；Or directly elastic component is fixed on valve pocket and is used for pushing tow limited block.In other embodiments, barrel
The right end divided can also be not provided with right end cap, and actuator screw thread is threaded on high pressure chest valve pocket at this time.In other embodiments, it drives
Moving part can also be slidingly sealed on the right end cap for being threaded onto valve pocket, need that the light installed for actuator is arranged on right end cap at this time
Hole.In other embodiments, operating side can also use other structures, such as: flat structure, as long as operator is facilitated to revolve
Turn operation.
In the embodiment of hydraulic actuating mechanism hydraulic control valve of the invention and the embodiment of above-mentioned hydraulic actuating mechanism
Hydraulic control valve structure it is identical, repeat no more.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811558042.1A CN109764152A (en) | 2018-12-19 | 2018-12-19 | A hydraulic operating mechanism and its hydraulic control valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811558042.1A CN109764152A (en) | 2018-12-19 | 2018-12-19 | A hydraulic operating mechanism and its hydraulic control valve |
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| CN109764152A true CN109764152A (en) | 2019-05-17 |
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| CN201811558042.1A Pending CN109764152A (en) | 2018-12-19 | 2018-12-19 | A hydraulic operating mechanism and its hydraulic control valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319242A (en) * | 2019-08-05 | 2019-10-11 | 安徽理工大学 | A kind of rotary spool switching mechanism based on bidirectional torsion spring |
| CN111173800A (en) * | 2019-12-16 | 2020-05-19 | 河南平高电气股份有限公司 | Electrohydraulic control valve for hydraulic operating mechanism and electromagnetic pilot valve and pilot valve thereof |
| CN112392789A (en) * | 2020-10-26 | 2021-02-23 | 平高集团有限公司 | Hydraulic control valve, hydraulic operating mechanism using same and circuit breaker |
| CN112443526A (en) * | 2020-10-26 | 2021-03-05 | 国网上海市电力公司 | Circuit breaker, hydraulic control valve and hydraulic operating mechanism |
| WO2021184850A1 (en) * | 2020-03-20 | 2021-09-23 | 平高集团有限公司 | Hydraulic operating mechanism and hydraulic control valve |
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| CN110319242B (en) * | 2019-08-05 | 2024-03-26 | 安徽理工大学 | Rotary valve core switching mechanism based on bidirectional torsion spring |
| CN111173800A (en) * | 2019-12-16 | 2020-05-19 | 河南平高电气股份有限公司 | Electrohydraulic control valve for hydraulic operating mechanism and electromagnetic pilot valve and pilot valve thereof |
| WO2021121170A1 (en) * | 2019-12-16 | 2021-06-24 | 河南平高电气股份有限公司 | Electro-hydraulic control valve for hydraulic operating mechanism, and electromagnetic pilot valve and pilot valve thereof |
| WO2021184850A1 (en) * | 2020-03-20 | 2021-09-23 | 平高集团有限公司 | Hydraulic operating mechanism and hydraulic control valve |
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