CN201963628U - Novel combination valve - Google Patents
Novel combination valve Download PDFInfo
- Publication number
- CN201963628U CN201963628U CN2011200485659U CN201120048565U CN201963628U CN 201963628 U CN201963628 U CN 201963628U CN 2011200485659 U CN2011200485659 U CN 2011200485659U CN 201120048565 U CN201120048565 U CN 201120048565U CN 201963628 U CN201963628 U CN 201963628U
- Authority
- CN
- China
- Prior art keywords
- hole
- screw
- overflow
- mounting hole
- oil
- 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.)
- Expired - Fee Related
Links
Images
Abstract
A novel combination valve relates to the technical field of hydraulic components. The left side of the valve body is provided with an oil supply hole, an oil return hole is arranged on the upper portion of the oil supply hole, an oil return branch hole communicated with the oil return hole is arranged on the top of the left side of the valve body, a first branch hole and a second branch hole are arranged in the oil supply hole, the first branch hole is communicated with the lower portion of the oil return branch hole, the second branch hole is sequentially communicated with a hydraulic control one-way valve hole, a connecting hole and a speed adjusting installation hole, and the left end of the second branch hole is closed off with a second plug screw. The top of the hydraulic control one-way valve hole is communicated with the bottom of the oil return branch hole, the hydraulic control one-way valve hole is disposed on the left side of the bottom of the valve body, the connecting hole is arranged in the middle of the bottom of the valve body, and the speed adjusting installation hole is arranged on the right side of the middle of the valve body. The novel combination valve overcomes the shortcomings of the prior art, has smart and reasonable structure and small size, is easy to maintain, and integrates the three functions of the hydraulic control one-way valve, a one-way throttle valve and the flood valve, thereby saving space and cost effectively.
Description
Technical field:
The utility model relates to hydraulic pressure components and parts technical field, especially a kind of selector valve, the combination brake switch and proporting that to be specifically related to a kind of liquid collecting control one-way valve, one-way throttle valve and three kinds of functions of relief valve be one.
Background technique:
In the prior art, the main jacking oil circuit of hydraulic pressure localization machine in the pressurize after reaching jacking and putting in place, the decline process synchronously, and the pressure release during overburdening must have Pilot operated check valve, one-way throttle valve and relief valve in the oil circuit design.If use the valve of these three difference in functionalitys respectively, certainly will cause big, the assembling difficulty of taking up room to be connected shortcomings such as complexity with oil circuit, and too much tie point cause bigger leakage may, maintain to later maintenance and to bring very big inconvenience.
The model utility content:
The purpose of this utility model provides a kind of novel combination brake switch and proporting, it overcomes deficiency of the prior art, and structure is ingenious rationally, volume is small and exquisite, maintaining is convenient, and its liquid collecting control one-way valve, one-way throttle valve and three kinds of functions of relief valve are one, thereby conserve space is saved cost effectively.
In order to solve the existing problem of background technique, the utility model is by the following technical solutions: it comprises plain washer, spring washer, socket head screw, throttling rod, handle, screw is adjusted in overflow, flat nut, pad, the overflow spring, the overflow spring seat, steel ball, screw base, copper washer, first spring, unidirectional overflow spool, the one O type circle, first back-up ring, first plug screw, bonded washer, first screw, second spring, the fluid-control one-way spool, second plug screw, the 2nd O type circle, valve body, second back-up ring, piston, second screw, the fluid-control one-way valve opening, attachment hole, the overflow mounting hole, the speed governing mounting hole, first hole, second hole, oil inlet hole, oil outlet, spill port, hole and overflow hole are propped up in oil return, the valve body left side offers oil inlet hole, oil inlet hole top is provided with spill port, upper end, valve body left side is provided with the oil return that communicates with spill port and props up the hole, have first hole and second hole in the oil inlet hole, first hole and oil return are propped up the bottom, hole and are communicated, second hole successively with the fluid-control one-way valve opening, attachment hole, the speed governing mounting hole communicates, and second hole left end shut by second plug screw, fluid-control one-way valve opening top and oil return are propped up the bottom, hole and are communicated, the fluid-control one-way valve opening is arranged on the valve body lower end left side, attachment hole is arranged on the valve body lower end middle part, and the speed governing mounting hole is arranged on the right side, middle part of valve body; The valve body right side is provided with oil outlet, and oil outlet communicates with overflow mounting hole, speed governing mounting hole successively, and the bottom of oil outlet communicates with attachment hole, and the overflow mounting hole is arranged on speed governing mounting hole right side; Overflow mounting hole and overflow hole communicate, and the bottom of overflow mounting hole and oil outlet communicate, and overflow hole is arranged on the oil outlet upper end; The fluid-control one-way spool is against its top conical surface on the hole of fluid-control one-way valve opening bottom by first screw and second spring, the attachment hole outer end is provided with first plug screw, pass through screw thread mounting pipe joint in the oil outlet, pipe joint is oppressed the unidirectional overflow spool conical surface on the small through hole of bottom, hole by first spring, by screw thread relief valve is installed in the relief valve mounting hole and adjusts screw, relief valve is adjusted the screw bottom and is withstood the overflow spring seat by the overflow spring, and and then firmly be pressed in the steel ball of overflow spring seat below on the screw base, the screw base lower end is provided with copper washer, screw base is installed in relief valve mounting hole inside by screw thread, wherein have aperture, aperture lower end and oil outlet are communicated with, and the upper end is shut by steel ball; Flat nut is spun on relief valve and adjusts on the screw, is pressed on the pad simultaneously; Socket head screw is installed in the throttling rod top by spring washer and plain washer with handle, and there is groove at the throttling rod middle part, and an O type circle is installed, and an O type circle outside is with first back-up ring, and the throttling rod bottom spins by screw thread and speed governing mounting hole; Second screw is fitted in pad on the valve body; Oil return is propped up in the hole by the pipe joint that is threaded, and oil return is propped up inside, hole piston is housed, and piston head is withstood by pipe joint, and the 2nd O type circle and second back-up ring are installed in the intermediate channel.
Described throttling rod bottom is the two-stage step-like structure that a kind of diameter differs, and bigger one section of diameter carries out the transition to the less part of diameter by one section chamfering, and the conical surface just in time is against on the hole of speed governing mounting hole bottom; Gap about 0.01-0.05mm is arranged between that section of diameter minimum and the hole wall on every side, inner hollow, periphery evenly has 3 sulculuses different in size.When throttling rod is rotated, and when moving in the screw thread transmission gradually, the conical surface that is against speed governing mounting hole bottom is at first opened, and has formed certain interval and has flowed out by fluid, then, expose at a longest groove top, the space that fluid flows is bigger, and then, expose at a groove top that is of moderate length, discharging the bigger flowing space, is a shortest groove of length at last.By this method, can realize good restriction effect, make the relation (Q-y curve) of the Vertical direction position of the flow of throttle valve and throttling rod be close to linear.
Working principle of the present utility model and working procedure:
When oil cylinder need be done the jacking action, oil inlet hole must be pressed, and fluid enters oil return by first hole and props up the bottom, hole, backed down the single overhead-valve core of hydraulic control downwards, entered second hole.If throttling rod is opened, fluid is adjusted screw bottom and attachment hole with entering overflow simultaneously.Fluid in the attachment hole backs down unidirectional overflow spool, converges to oil outlet output with another strand fluid, enters oil cylinder rodless cavity work.The fluid of cylinder rod chamber props up the hole backflow by spill port through oil return simultaneously, because this strand oil liquid pressure is very low, unable promotion second spring is not so piston can move.
If in the course of the work, the oil outlet internal pressure is excessive, reaches the critical value of setting, and oil pressure will overcome the thrust of overflow spring, back down the steel ball on its top by the aperture in the screw base, flows out pressure release from overflow hole, thereby guarantees the safety of whole system.The pressure of overflow spring can be adjusted screw adjusted by relief valve, and it is locked by flat nut to regulate the back that finishes, and prevents that unintentional rotation from causing default oil pressure relief to change.
When the oil cylinder jacking puts in place, the oil inlet hole decompression, because the active force of load, oil outlet must be pressed, oil pressure withstands from the right side with unidirectional overflow spool, the getting in touch of sealing oil outlet and attachment hole.If throttling rod is opened, oil pressure is passed in second hole from here, by hydraulic control single-action valve core inside aperture, hydraulic control individual event spool is withstood on hydraulic control individual event valve opening bottom, seal second hole and oil return prop up the hole contact of---that is first hole is to oil inlet hole---, thereby realized the pressurize braking of whole hydraulic system, the jacking cylinder is self-locking in certain position.
When the jacking cylinder needs to descend, oil return is propped up the hole and must be pressed, and fluid enters cylinder rod chamber by oil return Zhi Kongjing hole, and driven plunger descends.Oil pressure overcomes the thrust of spring simultaneously, and driven plunger promotes hydraulic control individual event spool and descends, and opens the contact in second hole and first hole, makes the fluid of oil cylinder rodless cavity be able to reflux along the route in oil outlet, speed governing mounting hole, second hole, first hole.
The utlity model has following beneficial effect: realized the repertoire of three kinds of valves such as Pilot operated check valve, one-way throttle valve and relief valve, its product with compact structure, maintaining are conveniently, and be easy to connect; Profile is very small and exquisite, has saved installing space greatly; And make processing simply, with low cost.
Description of drawings:
Fig. 1 is a hydraulic schematic diagram of the present utility model,
Fig. 2 is a sectional structure schematic representation of the present utility model.
Embodiment:
With reference to Fig. 1-2, this embodiment is by the following technical solutions: it comprises plain washer 1, spring washer 2, socket head screw 3, throttling rod 4, handle 5, screw 6 is adjusted in overflow, flat nut 7, pad 8, overflow spring 9, overflow spring seat 10, steel ball 11, screw base 12, copper washer 13, first spring 14, unidirectional overflow spool 15, the one O type circle 16, first back-up ring 17, first plug screw 18, bonded washer 19, first screw 20, second spring 21, fluid-control one-way spool 22, second plug screw 23, the 2nd O type circle 24, valve body 25, second back-up ring 26, piston 27, second screw 28, fluid-control one-way valve opening 29, attachment hole 30, overflow mounting hole 31, speed governing mounting hole 32, first hole 33, second hole 34, oil inlet hole P, oil outlet A, spill port B1, hole B2 and overflow hole T are propped up in oil return, valve body 25 left sides offer oil inlet hole P, oil inlet hole P top is provided with spill port B1, upper end, valve body 25 left sides is provided with the oil return that communicates with spill port B1 and props up hole B2, have first hole 33 and second hole 34 in the oil inlet hole P, first hole 33 and oil return are propped up B2 bottom, hole and are communicated, second hole 34 successively with fluid-control one-way valve opening 29, attachment hole 30, speed governing mounting hole 32 communicates, and second hole 34 left end shut by second plug screw 23, fluid-control one-way valve opening 29 tops and oil return are propped up hole B2 bottom and are communicated, fluid-control one-way valve opening 29 is arranged on left side, valve body 25 lower ends, attachment hole 30 is arranged on middle part, valve body 25 lower ends, and speed governing mounting hole 32 is arranged on the right side, middle part of valve body 25; Valve body 25 right sides are provided with oil outlet A, and oil outlet A communicates with overflow mounting hole 31, speed governing mounting hole 32 successively, and the bottom of oil outlet A communicates with attachment hole 30, and overflow mounting hole 31 is arranged on speed governing mounting hole 32 right sides; Overflow mounting hole 31 and overflow hole T communicate, and the bottom of overflow mounting hole 31 and oil outlet A communicate, and overflow hole T is arranged on oil outlet A upper end; Fluid-control one-way spool 22 is against its top conical surface on the hole of fluid-control one-way valve opening 29 bottoms by first screw 20 and second spring 21, attachment hole 30 outer ends are provided with first plug screw 18, pass through screw thread mounting pipe joint in the oil outlet A, pipe joint is oppressed unidirectional overflow spool 15 conical surfaces on the small through hole of bottom, hole by first spring 14, by screw thread relief valve is installed in the relief valve mounting hole 31 and adjusts screw 6, relief valve is adjusted screw 6 bottoms and is withstood overflow spring seat 10 by overflow spring 9, and and then the steel ball 11 of overflow spring seat 10 belows firmly is pressed on the screw base 12, screw base 12 lower ends are provided with copper washer 13, screw base 12 is installed in relief valve mounting hole 31 inside by screw thread, wherein have aperture, aperture lower end and oil outlet A are communicated with, and the upper end is shut by steel ball 11; Flat nut 7 is spun on relief valve and adjusts on the screw 6, is pressed on simultaneously on the pad 8; Socket head screw 3 is installed in throttling rod 4 tops by spring washer 2 and plain washer 1 with handle 5, there is groove at throttling rod 4 middle parts, and an O type circle 16, the one O type circles 16 outsides are installed are with first back-up ring 17, throttling rod 4 bottoms spin by screw thread and speed governing mounting hole 32; Second screw 28 is fitted in pad 8 on the valve body 25; Oil return is propped up in the B2 of hole by the pipe joint that is threaded, and oil return is propped up B2 inside, hole piston 27 is housed, and piston 27 tops are withstood by pipe joint, and the 2nd O type circle 24 and second back-up ring 26 are installed in the intermediate channel.
Described throttling rod 4 bottoms are two-stage step-like structures that a kind of diameter differs, and bigger one section of diameter carries out the transition to the less part of diameter by one section chamfering, and the conical surface just in time is against on the hole of speed governing mounting hole 32 bottoms; Gap about 0.05mm is arranged between that section of diameter minimum and the hole wall on every side, inner hollow, periphery evenly has 3 sulculuses different in size.When throttling rod 4 is rotated, and when moving in the screw thread transmission gradually, the conical surface that is against speed governing mounting hole 32 bottoms is at first opened, and has formed certain interval and has flowed out by fluid, then, expose at a longest groove top, the space that fluid flows is bigger, and then, expose at a groove top that is of moderate length, discharging the bigger flowing space, is a shortest groove of length at last.By this method, can realize good restriction effect, make the relation (Q-y curve) of the Vertical direction position of the flow of throttle valve and throttling rod 4 be close to linear.
Working principle of this embodiment and working procedure:
When oil cylinder need be done the jacking action, oil inlet hole P must press, and fluid enters oil return by first hole 33 and props up hole B2 bottom, backs down hydraulic control individual event spool 22 downwards, enters second hole 34.If throttling rod 4 is opened, fluid is adjusted screw 6 bottoms and attachment hole 30 with entering overflow simultaneously.Fluid in the attachment hole 30 backs down unidirectional overflow spool 15, converges to oil outlet A output with another strand fluid, enters oil cylinder rodless cavity work.The fluid of cylinder rod chamber props up B2 backflow in hole by spill port B1 through oil return simultaneously, because this strand oil liquid pressure is very low, unable promotion second spring 21 is not so piston 27 can move.
If in the course of the work, oil outlet A internal pressure is excessive, reaches the critical value of setting, and oil pressure will overcome the thrust of overflow spring 9, backs down the steel ball 11 on its top by the aperture in the screw base 11, flows out pressure release from overflow hole T, thereby guarantees the safety of whole system.The pressure of overflow spring 9 can be adjusted screw 6 by relief valve and regulate, and it is locked by flat nut 7 to regulate the back that finishes, and prevents that unintentional rotation from causing default oil pressure relief to change.
When the oil cylinder jacking puts in place, oil inlet hole P decompression, because the active force of load, oil outlet A must press, oil pressure withstands from the right side with unidirectional overflow spool, the getting in touch of sealing oil outlet A and attachment hole 30.If throttling rod 4 is opened, oil pressure is passed in second hole 34 from here, by hydraulic control single-action spool 22 inner aperture, hydraulic control individual event spool 22 is withstood on hydraulic control individual event valve opening 29 bottoms, seal second hole 34 and oil return the prop up hole B2 contact of---that is first hole is to oil inlet hole P---, thereby realized the pressurize braking of whole hydraulic system, the jacking cylinder is self-locking in certain position.
When the jacking cylinder needs to descend, oil return is propped up hole B2 and must be pressed, and fluid props up hole B2 by oil return and enters cylinder rod chamber through spill port B1 hole, and driven plunger descends.Oil pressure overcomes the thrust of spring 21 simultaneously, driven plunger 27 promotes hydraulic control individual event spool 22 and descends, open the contact in second hole 34 and first hole 33, the route that makes the fluid of oil cylinder rodless cavity be able to 34, first hole 33 along oil outlet A, speed governing mounting hole 32, second hole refluxes.
This embodiment has realized the repertoire of three kinds of valves such as Pilot operated check valve, one-way throttle valve and relief valve, and its product with compact structure, maintaining are conveniently, and be easy to connect; Profile is very small and exquisite, has saved installing space greatly; And make processing simply, with low cost.
Claims (2)
1. novel combination brake switch and proporting, it is characterized in that it comprises plain washer (1), spring washer (2), socket head screw (3), throttling rod (4), handle (5), screw (6) is adjusted in overflow, flat nut (7), pad (8), overflow spring (9), overflow spring seat (10), steel ball (11), screw base (12), copper washer (13), first spring (14), unidirectional overflow spool (15), the one O type circle (16), first back-up ring (17), first plug screw (18), bonded washer (19), first screw (20), second spring (21), fluid-control one-way spool (22), second plug screw (23), the 2nd O type circle (24), valve body (25), second back-up ring (26), piston (27), second screw (28), fluid-control one-way valve opening (29), attachment hole (30), overflow mounting hole (31), speed governing mounting hole (32), first hole (33), second hole (34), oil inlet hole (P), oil outlet (A), spill port (B1), hole (B2) and overflow hole (T) are propped up in oil return, valve body (25) left side offers oil inlet hole (P), oil inlet hole (P) top is provided with spill port (B1), upper end, valve body (25) left side is provided with the oil return that communicates with spill port (B1) and props up hole (B2), have first hole (33) and second hole (34) in the oil inlet hole (P), first hole (33) and oil return are propped up bottom, hole (B2) and are communicated, second hole (34) successively with fluid-control one-way valve opening (29), attachment hole (30), speed governing mounting hole (32) communicates, and second hole (34) left end is shut by second plug screw (23), fluid-control one-way valve opening (29) top and oil return are propped up bottom, hole (B2) and are communicated, fluid-control one-way valve opening (29) is arranged on left side, valve body (25) lower end, attachment hole (30) is arranged on middle part, valve body (25) lower end, and speed governing mounting hole (32) is arranged on the right side, middle part of valve body (25); Valve body (25) right side is provided with oil outlet (A), oil outlet (A) communicates with overflow mounting hole (31), speed governing mounting hole (32) successively, and the bottom of oil outlet (A) communicates with attachment hole (30), and overflow mounting hole (31) is arranged on speed governing mounting hole (32) right side; Overflow mounting hole (31) and overflow hole (T) communicate, and the bottom of overflow mounting hole (31) and oil outlet (A) communicate, and overflow hole (T) is arranged on oil outlet (A) upper end; Fluid-control one-way spool (22) is against its top conical surface on the hole of fluid-control one-way valve opening (29) bottom by first screw (20) and second spring (21), attachment hole (30) outer end is provided with first plug screw (18), pass through screw thread mounting pipe joint in the oil outlet (A), pipe joint is oppressed unidirectional overflow spool (15) conical surface on the small through hole of bottom, hole by first spring (14), by screw thread relief valve is installed in the relief valve mounting hole (31) and adjusts screw (6), relief valve is adjusted screw (6) bottom and is withstood overflow spring seat (10) by overflow spring (9), and and then the steel ball (11) of overflow spring seat (10) below firmly is pressed on the screw base (12), screw base (12) lower end is provided with copper washer (13), screw base (12) is installed in relief valve mounting hole (31) inside by screw thread, wherein have aperture, aperture lower end and oil outlet (A) are communicated with, and the upper end is shut by steel ball (11); Flat nut (7) is spun on relief valve and adjusts on the screw (6), is pressed on simultaneously on the pad (8); Socket head screw (3) is installed in throttling rod (4) top by spring washer (2) and plain washer (1) with handle (5), there is groove at throttling rod (4) middle part, and an O type circle (16) is installed, the one O type circle (16) outside is with first back-up ring (17), and throttling rod (4) bottom spins by screw thread and speed governing mounting hole (32); Second screw (28) is fitted in pad (8) on the valve body (25); Oil return is propped up in the hole (B2) by the pipe joint that is threaded, and oil return is propped up inside, hole (B2) piston (27) is housed, and piston (27) top is withstood by pipe joint, and the 2nd O type circle (24) and second back-up ring (26) are installed in the intermediate channel.
2. a kind of novel combination brake switch and proporting according to claim 1, it is characterized in that described throttling rod (4) bottom is the two-stage step-like structure that a kind of diameter differs, bigger one section of diameter carries out the transition to the less part of diameter by one section chamfering, and the conical surface just in time is against on the hole of speed governing mounting hole (32) bottom; The gap that 0.01-0.05mm is arranged between that section of diameter minimum and the hole wall on every side, inner hollow, periphery evenly has 3 sulculuses different in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200485659U CN201963628U (en) | 2011-02-25 | 2011-02-25 | Novel combination valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200485659U CN201963628U (en) | 2011-02-25 | 2011-02-25 | Novel combination valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201963628U true CN201963628U (en) | 2011-09-07 |
Family
ID=44526164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200485659U Expired - Fee Related CN201963628U (en) | 2011-02-25 | 2011-02-25 | Novel combination valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201963628U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI463076B (en) * | 2012-03-16 | 2014-12-01 | ||
| CN106382269A (en) * | 2016-09-22 | 2017-02-08 | 安徽理工大学 | Combination valve with speed governing, reversing and overflow functions |
| CN111099513A (en) * | 2018-10-28 | 2020-05-05 | 国营四达机械制造公司 | Hydraulic jack for airplane |
-
2011
- 2011-02-25 CN CN2011200485659U patent/CN201963628U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI463076B (en) * | 2012-03-16 | 2014-12-01 | ||
| CN106382269A (en) * | 2016-09-22 | 2017-02-08 | 安徽理工大学 | Combination valve with speed governing, reversing and overflow functions |
| CN111099513A (en) * | 2018-10-28 | 2020-05-05 | 国营四达机械制造公司 | Hydraulic jack for airplane |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201963628U (en) | Novel combination valve | |
| CN105952702A (en) | Balance valve | |
| CN107989848B (en) | Energy-saving sequence valve | |
| CN201363330Y (en) | Plate-type one-way speed-regulating valve | |
| CN201696384U (en) | Control valve special for hydraulic lifting and descending of plunger cylinder | |
| CN2761929Y (en) | Integral multipass reversal valve | |
| CN202612761U (en) | Direct-acting type internal-control unidirectional sequence valve | |
| CN109058208B (en) | Buffer overflow valve | |
| CN201513403U (en) | Multistage cylinder integrated control hydraulic valve group | |
| CN109611399B (en) | Throttle valve and pressure relief system | |
| CN216518936U (en) | Control hydraulic cylinder action integrated valve set with automatic pressure supplementing and energy storage functions | |
| CN203718065U (en) | Pressure release valve | |
| CN202926568U (en) | Oil-well pump without traveling valve | |
| CN101886643B (en) | Control valve special for hydraulic lifting of plunger cylinder | |
| CN201232787Y (en) | Limiting hydraulic valve | |
| CN208702833U (en) | A kind of oil return apparatus at a slow speed of oil cylinder | |
| CN204459184U (en) | Manual relief valve | |
| CN109469660B (en) | Double-valve-core control synchronous valve | |
| CN205977860U (en) | From decompression load sensing multiple directional control valve | |
| CN219081957U (en) | Electromagnetic overflow valve structure capable of achieving two-stage pressure regulation | |
| CN108571488B (en) | Pulse type hydraulic partial pressure synchronous valve | |
| CN201272396Y (en) | Power-driven steering mechanism for automobile | |
| CN200989338Y (en) | Integrated hand multipath reversing valve | |
| CN101324285A (en) | Limit flow hydraulic valve | |
| CN205533511U (en) | Flow pairs valve and adopt flow to pair electric liquid final controlling element of valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20130225 |