CN106369200A - Gas spring overflow valve - Google Patents
Gas spring overflow valve Download PDFInfo
- Publication number
- CN106369200A CN106369200A CN201610957087.0A CN201610957087A CN106369200A CN 106369200 A CN106369200 A CN 106369200A CN 201610957087 A CN201610957087 A CN 201610957087A CN 106369200 A CN106369200 A CN 106369200A
- Authority
- CN
- China
- Prior art keywords
- valve
- piston
- gas spring
- chute
- cylinder body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/005—Leakage; Spillage; Hose burst
Abstract
The invention discloses a gas spring overflow valve. The overflow valve comprises a limiting nut, a piston push rod, pistons, a spring, a valve core, a valve sleeve, a valve seat, a valve body and a piston cylinder. According to the gas spring overflow valve, two pistons with large diameter difference are arranged on the upper and lower ends of the gas spring, and the large piston which is located on the upper end is used for quickly establishing the internal pressure of the gas spring; the small piston which is located on the lower end is connected with the valve core of the overflow valve and is used for outputting thrust to the valve core of the overflow valve; and the diameter of the small piston is small, therefore, the change of the internal volume of the gas spring is small in the process that the valve core is opened, and the internal pressure of the gas spring can be basically kept constant, i.e. the thrust of the gas spring to the valve core can be kept constant all the time in the process that the valve core is opened. According to the gas spring overflow valve, clever structural design is utilized, so that the problem of large pressure adjustment deviation of a traditional indirect detection type overflow valve is effectively solved.
Description
Technical field
The present invention relates to a kind of gas spring overflow valve, belong to electrichydraulic control field.
Background technology
Traditional direct-acting overflow valve relies on the operating pressure to arrange overflow valve for the pre compressed magnitude setting pressure spring, with
The increase of excess flow, overflow valve valve port opening is gradually increased, i.e. relief valve spool displacement is gradually increased, and pressure spring is entered
One step compression, the spring force acting on valve element increases, and therefore overflow valve inlet pressure increases with the increase of excess flow,
Make overflow valve occur in that larger override pressure, overflow valve performance is had adverse effect on.With respect to direct-acting overflow valve,
The override pressure of traditional indirect detection type pilot operated compound relief valve is less, typically 15% about, but still remains larger inclined
Difference.
During traditional overflow valve carries out oil pressure relief setting, need to open hydraulic system, set with real-time monitoring overflow
The size of constant-pressure.During carrying out overflow valve pressure setting, hydraulic system is often operated in high-pressure high-flow operating mode, and this is not
But have impact on the service life of hydraulic system, also can cause the waste of the energy.
In consideration of it, the present inventor carries out in-depth study to the problems referred to above, this case is then had to produce.
Content of the invention
It is an object of the invention to provide a kind of gas spring overflow valve that can reduce override pressure.
In order to achieve the above object, the present invention is using such technical scheme:
A kind of gas spring overflow valve, including valve seat, the valve pocket being arranged in valve seat, the valve pocket being arranged in valve pocket, can
Slide the valve element that is disposed in valve pocket and support the elastic top-pressure mechanism on valve element, is provided with and connects with valve pocket on valve seat
Oil-in and oil-out, elastic top-pressure mechanism include cylinder body, the first valve body, the second valve body, the first piston being arranged in cylinder body,
It is arranged on the elastic component between first piston and the second valve body, the first piston push rod being arranged on the first valve body, be opened in
Chute on two valve bodies, cooperation in the second piston in chute and are arranged on second piston push rod in chute, and the one of chute
Hold the inner space of elastic component corresponding with cylinder body, the other end of chute is connected with valve pocket, and one end of second piston push rod is arranged on
In chute, the other end is supported on valve element, and second piston push rod is arranged on the second valve body in the way of can moving axially along cylinder body
On, valve element two ends vertically are set to first end and the second end, first end corresponding second piston push rod setting, two port
Oil-in is answered to arrange, the corresponding described first end of valve pocket and described second end are respectively equipped with first chamber and second chamber, also include
First oil circuit, one end of the first oil circuit is connected with first chamber, and the other end of the first oil circuit is connected with second chamber, and valve element is in institute
The area stating the circumferential cross-section of first end is less than the area of the circumferential cross-section at described second end, chute area of section circumferentially
Area less than inner chamber of cylinder block circumferentially section.
As a kind of optimal way of the present invention, described first valve body is provided with the first axis hole being mutually linked and bolt
Hole, is equipped with regulating bolt, regulating bolt is arranged with stop nut in bolt hole, described first piston push rod is with can be along first
The mode of axis hole axial movement is plugged in the first axis hole, and one end of described first piston push rod is supported in described first piston
On, the other end is supported in regulating bolt.
As a kind of optimal way of the present invention, described first valve body is provided with the first passage, and the one of the first passage
End is connected with described cylinder body, and the other end is communicated to outside air.
As a kind of optimal way of the present invention, described elastic component is spring.
As a kind of optimal way of the present invention, described first valve body screw thread is connected to one end of described cylinder body, and described
Two valve body screw threads are connected to the other end of described cylinder body, and described second valve body is bolted on described valve seat.
As a kind of optimal way of the present invention, the inner chamber of the corresponding elastic component of described cylinder body area of section circumferentially is long-range
In described chute area of section circumferentially.
As a kind of optimal way of the present invention, between the inwall of described first piston and described cylinder body, it is provided with sealing ring,
It is provided with sealing ring between the inwall of described second piston and described chute, be provided with close between the side wall of described valve pocket and described valve pocket
Seal, the second end of described valve element is provided with annular boss.
As a kind of optimal way of the present invention, described chute is separated into upper chamber and lower chambers by described second piston,
Also include the second oil circuit, one end of the second oil circuit is connected with described oil-out, and the other end is connected with lower chambers.
As a kind of optimal way of the present invention, the side wall of described valve element is provided with balancing slit.
As a kind of optimal way of the present invention, the side wall of described cylinder body is provided with inflation pressure tap, and inflation pressure tap is from institute
The inwall stating cylinder body is through to outer wall, and inflation pressure tap is arranged between described first piston and described second valve body.
After technical scheme, by the setting of first piston and second piston relative size, overflow valve valve
When mouth is opened, the pressure variations influence that valve element opens the inner chamber that the change in volume producing arranges elastic component to cylinder body is less, eliminates
The override pressure of overflow valve.
The present invention further setting inflation pressure tap on cylinder body, can measure cylinder body in real time and arrange the interior of elastic component
The pressure in chamber, the therefore present invention on the premise of not opening oil supply system, can know the setting pressure of overflow valve.
Brief description
Accompanying drawing 1 is the generalized section of the present invention；
Accompanying drawing 2 is valve element of the present invention and valve pocket schematic diagram；
Accompanying drawing identifier declaration:
1st, stop nut 2, first piston push rod
3rd, first piston 4, spring
5th, second piston 5.1, second piston air seal circle mounting groove
6th, second piston push rod 6.1, second piston push rod rounded ends
7th, valve element 7.1, annular flange flange
7.2nd, balancing slit 8, valve pocket
8.1st, oil-out 8.2, oil-in
8.3rd, sealing ring mounting groove 9, valve seat
9.3rd, valve pocket 9.31, first chamber
9.32nd, second chamber 10, the second valve body
10.1st, first chamber 10.2 first oil circuit
10.3rd, the second oil circuit 10.4, second chamber
10.5th, chute 11, cylinder body
11.1st, inflation pressure tap 11.2, the inner chamber of the corresponding elastic component of cylinder body
12nd, the first valve body 12.1, the first passage
13rd, regulating bolt
Specific embodiment
In order to technical scheme is explained further, it is described in detail below in conjunction with the accompanying drawings.
See figures.1.and.2, a kind of gas spring overflow valve, including valve seat 9, the valve pocket 9.3 that is arranged in valve seat 9, setting
In the valve pocket 8 in valve pocket 9.3, the valve element 7 that is slidably disposed in valve pocket 8 and support the elastic top-pressure mechanism on valve element 7,
The oil-in 8.2 being connected with valve pocket 9.3 and oil-out 8.1 are provided with valve seat 9, when oil-in 8.2 exceedes setting value, fluid
By valve element 7 jack-up, fluid flows out from oil-out 8.1.
In the present invention, elastic top-pressure mechanism includes cylinder body 11, the first valve body 12, the second valve body 10, is arranged in cylinder body 11
First piston 3, the elastic component being arranged between first piston 3 and the second valve body 10, be arranged on the first valve body 12 first
Piston push rod 2, the chute 10.5 being opened on the second valve body 10, second piston 5 in chute 10.5 for the cooperation and be arranged on
Second piston push rod 6 in chute 10.5, chute 10.5 is axially arranged along the second valve body 10, one end of chute 10.5 and cylinder body
The inner chamber 11.2 of corresponding elastic component connects, and the other end of chute 10.5 is connected with valve pocket 9.3.One end of second piston push rod 6 sets
Put in chute 10.5, the other end is supported on valve element 7, second piston push rod 6 is in the way of can moving axially along chute 10.5
It is arranged on the second valve body 10.Valve element 7 two ends vertically are set to first end 7.3 and the second end the 7.4, the 1st is corresponding
Second piston push rod 6 is arranged, and the corresponding oil-in 8.2 in the second end 7.4 is arranged, the corresponding described first end 7.3 of valve pocket 9.3 and described the
Two ends 7.3 are respectively equipped with first chamber 10.1 and second chamber 10.4, also include the first oil circuit 10.2, and the one of the first oil circuit 10.2
End is connected with first chamber 10.1, and the other end of the first oil circuit 10.2 is connected with second chamber 10.4, in force, the first oil circuit
10.2 parts are opened in valve seat 9, are partly opened in the second valve body 10.In the present invention, valve element 7 is in described first end 7.3
The area of circumferential cross-section is less than the area of the circumferential cross-section at described second end 7.4, and chute 10.5 area of section circumferentially is little
In the area in the inner chamber 11.2 circumferentially section of the corresponding elastic component of cylinder body, so that the circumferential cross-section area of first piston 3 is big
In second piston 5 circumferential cross-section area.
As a kind of optimal way of the present invention, described first valve body 12 is provided with the first axis hole being mutually linked and bolt
Hole, is equipped with regulating bolt 13 in bolt hole, regulating bolt 13 is arranged with stop nut 1, and described first piston push rod 2 is with can
Mode along the axial movement of first axle hole is plugged in the first axis hole, and one end of described first piston push rod 2 is supported described the
On one piston 3, the other end is supported in regulating bolt 13.
As a kind of optimal way of the present invention, described first valve body 12 is provided with the first passage 12.1, the first ventilation
The one end in hole 12.1 is connected with cylinder body 11 (being specifically connected to cylinder body the inner chamber being not provided with spring), and the other end is communicated to extraneous sky
Gas.
As a kind of optimal way of the present invention, described elastic component.It is preferable that second piston bar 6 has second piston pushing away
Bar rounded ends 6.1, this second piston push rod rounded ends 6.1 is supported on valve element 7.
As a kind of optimal way of the present invention, described first valve body 12 is threaded in one end of described cylinder body 11, institute
State the other end that the second valve body 10 is threaded in described cylinder body 11, described second valve body 10 is bolted in described valve seat
On 9.
As a kind of optimal way of the present invention, the inner chamber 11.2 of the corresponding elastic component of described cylinder body area of section circumferentially
Much larger than described chute 10.5 area of section circumferentially so that the external diameter of first piston 3 and second piston 5 have larger
Gap, those skilled in the art can be arranged accordingly according to practical situation.
As a kind of optimal way of the present invention, between described first piston 3 and the inwall of described cylinder body 11, it is provided with sealing
Circle, is provided with sealing ring between described second piston 5 and the inwall of described chute 10.5, is correspondingly provided with second in second piston 5
Piston gas sealing ring mounting groove 5.1 is in order to install sealing ring.It is provided with close between described valve pocket 8 and the side wall of described valve pocket 9.3
Seal, on valve pocket 8, correspondence opens up sealing ring mounting groove 8.3 in order to install sealing ring.In the present invention, the second of described valve element 7
End 7.4 is provided with annular boss 7.1, so that the area a at the second end 7.41Area a more than first end2.
As a kind of optimal way of the present invention, described second piston 5 by described chute 10.5 be separated into upper chamber and under
Chamber, also includes the second oil circuit 10.3, and one end of the second oil circuit 10.3 is connected with described oil-out 8.1, the other end and lower chambers
Connection.
As a kind of optimal way of the present invention, the side wall of described valve element 7 is provided with balancing slit 7.2.
As a kind of optimal way of the present invention, the side wall of described cylinder body 11 is provided with inflation pressure tap 11.1, inflates pressure measurement
Mouthfuls 11.1 are through to outer wall from the inwall of described cylinder body 11, and inflation pressure tap 11.1 is arranged on described first piston 3 and described the
Between two valve bodies 10.
The concrete operating principle of the present invention is as follows:
Inflation: before inflation, turn regulating bolt 13 counterclockwise, first piston 3 moves in the presence of spring 4 upwards
Dynamic, gas spring compression chamber (i.e. the inner chamber 11.2 of the corresponding elastic component of cylinder body) volume increases；After the completion of inflation, in inflation pressure tap
11.1 installation pressure measurement meter connectors, can connect pressure gauge to gas spring compression chamber pressure p3Carry out real-time detection.
Pressure regulation: turn regulating bolt 13 clockwise, regulating bolt 13 pushes first piston push rod 2 and moves downward, and first lives
Plug push rod 2 heads on first piston 3 and moves downward, and in the process, gas spring compression chamber volume tapers into, pressure p3Gradually
Raise, p can be observed by inflating the pressure gauge installed at pressure tap 11.13Numerical value.It is convex that valve element 7 lower end is provided with ring-type
Platform 7.1, valve element 7 upper surface area is set to as a2, lower surface area is set to a1, a1＞ a2.Oil-in 8.2 passes through the first oil circuit
10.2 are communicated with the first chamber 10.1 of valve element 7, and therefore active area on valve element 7 for the hydraulic oil at oil-in 8.2 is a1-
a2, the face area a of design second piston 53=a1-a2, then relief valve set pressure is equal to the pressure p of gas spring compression chamber3,
Thus realizing not open the setting pressure that hydraulic oil source can know regulation relief valve in real time.
Overflow valve works: when overflow valve oil-in 8.2 pressure p1More than setting pressure p3When, overflow valve valve port is opened, if overflowing
Stream valve core 7 maximum displacement is h, then gas spring compression chamber 11.2 is because the change in volume that valve element 7 is opened and produced is a3*h；
Designed second piston 5 diameter is small-sized for whole overflow valve, relief valve spool 7 maximum displacement be also one relatively
Little numerical value, therefore can design a larger gas spring compression chamber volume, allow and open, because of valve element 7, the change in volume producing
The pressure change of the gas spring compression chamber leading to reaches negligible degree.P therefore in valve element 7 opening process3
Keep constant, effectively eliminated the override pressure of overflow valve.
In the present invention, gas spring upper and lower end parts are provided with two larger pistons of diameter difference, big positioned at upper end
Piston is used for quickly setting up the pressure within gas spring；Valve piston positioned at bottom is connected to relief valve spool, for
Relief valve spool thrust output；Valve piston diameter very little, thus the gas spring internal volume causing in valve element opening process becomes
Change amount very little, gas spring internal pressure can remain constant substantially, and that is, in valve element opening process, gas spring pushes away to valve element
Power can remain constant.This gas spring overflow valve, using cleverly structure design, efficiently solves traditional indirect detection
The big problem of formula relief valve pressure regulating deviation.
The product form of the present invention is not limited to this case diagram and embodiment, and anyone carries out the suitable of similar thinking to it
Change or modification, all should be regarded as the patent category without departing from the present invention.
Claims (10)
1. a kind of gas spring overflow valve, including valve seat, the valve pocket being arranged in valve seat, the valve pocket being arranged in valve pocket, can slide
The dynamic valve element being disposed in valve pocket and support the elastic top-pressure mechanism on valve element, is provided with entering of connecting with valve pocket on valve seat
Hydraulic fluid port and oil-out it is characterised in that: elastic top-pressure mechanism includes cylinder body, the first valve body, the second valve body, is arranged in cylinder body
First piston, the elastic component being arranged between first piston and the second valve body, the first piston push rod being arranged on the first valve body,
The chute that is opened on the second valve body, cooperation in the second piston in chute and are arranged on second piston push rod in chute,
The inner space of one end of chute elastic component corresponding with cylinder body, the other end of chute is connected with valve pocket, and the one of second piston push rod
End is arranged in chute, and the other end is supported on valve element, and second piston push rod is arranged in the way of can moving axially along cylinder body
On second valve body, valve element two ends vertically are set to first end and the second end, first end corresponding second piston push rod setting,
The corresponding oil-in setting of second end, the corresponding described first end of valve pocket and described second end are respectively equipped with first chamber and the second chamber
Room, also includes the first oil circuit, and one end of the first oil circuit is connected with first chamber, and the other end of the first oil circuit is with second chamber even
Logical, the area of the circumferential cross-section in described first end for the valve element is less than the area of the circumferential cross-section at described second end, and chute is along week
To area of section be less than the area in inner chamber of cylinder block circumferentially section.
2. as claimed in claim 1 a kind of gas spring overflow valve it is characterised in that: described first valve body is provided with mutual rank
The first axis hole connecing and bolt hole, are equipped with regulating bolt, regulating bolt are arranged with stop nut in bolt hole, and described first
Piston push rod is plugged in the first axis hole in the way of can moving axially along first axle hole, and one end of described first piston push rod is supported
Withstand on described first piston, the other end is supported in regulating bolt.
3. as claimed in claim 2 a kind of gas spring overflow valve it is characterised in that: described first valve body be provided with first lead to
Pore, one end of the first passage is connected with described cylinder body, and the other end is communicated to outside air.
4. as claimed in claim 1 a kind of gas spring overflow valve it is characterised in that: described elastic component be spring.
5. as claimed in claim 1 a kind of gas spring overflow valve it is characterised in that: described first valve body screw thread is connected to institute
State one end of cylinder body, described second valve body screw thread is connected to the other end of described cylinder body, described second valve body is bolted
On described valve seat.
6. as claimed in claim 1 a kind of gas spring overflow valve it is characterised in that: the inner chamber of the corresponding elastic component of described cylinder body
Area of section circumferentially is much larger than described chute area of section circumferentially.
7. as claimed in claim 1 a kind of gas spring overflow valve it is characterised in that: described first piston and described cylinder body
Be provided with sealing ring between inwall, between the inwall of described second piston and described chute, be provided with sealing ring, described valve pocket with described
It is provided with sealing ring, the second end of described valve element is provided with annular boss between the side wall of valve pocket.
8. as claimed in claim 1 a kind of gas spring overflow valve it is characterised in that: described chute is divided by described second piston
It is divided into upper chamber and lower chambers, also includes the second oil circuit, one end of the second oil circuit is connected with described oil-out, the other end and cavity of resorption
Room connects.
9. as claimed in claim 1 a kind of gas spring overflow valve it is characterised in that: the side wall of described valve element is provided with all presses
Groove.
10. a kind of gas spring overflow valve as described in any one of claim 1 to 9 it is characterised in that: the side wall of described cylinder body
It is provided with inflation pressure tap, inflation pressure tap is through to outer wall from the inwall of described cylinder body, inflation pressure tap is arranged on described first
Between piston and described second valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957087.0A CN106369200B (en) | 2016-11-03 | 2016-11-03 | A kind of gas spring overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957087.0A CN106369200B (en) | 2016-11-03 | 2016-11-03 | A kind of gas spring overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106369200A true CN106369200A (en) | 2017-02-01 |
| CN106369200B CN106369200B (en) | 2018-07-20 |
Family
ID=57892918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610957087.0A Active CN106369200B (en) | 2016-11-03 | 2016-11-03 | A kind of gas spring overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106369200B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725814A (en) * | 2017-11-10 | 2018-02-23 | 宁波新佳行自动化工业有限公司 | One kind switchs controllable joint |
| CN109236781A (en) * | 2018-11-14 | 2019-01-18 | 宁波丰州机械有限公司 | Time sequencing valve |
| CN111795033A (en) * | 2020-07-16 | 2020-10-20 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN113217497A (en) * | 2021-05-24 | 2021-08-06 | 西安航天远征流体控制股份有限公司 | Plug-in type energy storage overflow valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1200766A (en) * | 1966-08-12 | 1970-08-05 | Hymate Ges Fur Hydraulische Au | Pressure regulating valve |
| DE19605895A1 (en) * | 1996-02-17 | 1997-08-21 | Festo Kg | Pressure-compensated choke, adjusted by recess-riding element |
| CN202091583U (en) * | 2011-05-20 | 2011-12-28 | 彭国军 | Overflow relief valve |
| CN102713381A (en) * | 2009-11-17 | 2012-10-03 | 罗伯特·博世有限公司 | Pilot-operated pressure control valve |
| CN103233936A (en) * | 2013-04-28 | 2013-08-07 | 华侨大学 | Insertion-structure-based pilot-operated electric-hydraulic proportional spill valve |
| CN103615424A (en) * | 2013-12-09 | 2014-03-05 | 怀特(中国)驱动产品有限公司 | Direct-operated-type hydraulic threaded insertion buffer overflow valve |
| CN104633233A (en) * | 2015-02-11 | 2015-05-20 | 华侨大学 | Overflow valve with magneto-rheological pilot valve |
| CN105909584A (en) * | 2016-03-02 | 2016-08-31 | 杭州力龙液压有限公司 | Buffer overflow valve |
-
2016
- 2016-11-03 CN CN201610957087.0A patent/CN106369200B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1200766A (en) * | 1966-08-12 | 1970-08-05 | Hymate Ges Fur Hydraulische Au | Pressure regulating valve |
| DE19605895A1 (en) * | 1996-02-17 | 1997-08-21 | Festo Kg | Pressure-compensated choke, adjusted by recess-riding element |
| CN102713381A (en) * | 2009-11-17 | 2012-10-03 | 罗伯特·博世有限公司 | Pilot-operated pressure control valve |
| CN202091583U (en) * | 2011-05-20 | 2011-12-28 | 彭国军 | Overflow relief valve |
| CN103233936A (en) * | 2013-04-28 | 2013-08-07 | 华侨大学 | Insertion-structure-based pilot-operated electric-hydraulic proportional spill valve |
| CN103615424A (en) * | 2013-12-09 | 2014-03-05 | 怀特(中国)驱动产品有限公司 | Direct-operated-type hydraulic threaded insertion buffer overflow valve |
| CN104633233A (en) * | 2015-02-11 | 2015-05-20 | 华侨大学 | Overflow valve with magneto-rheological pilot valve |
| CN105909584A (en) * | 2016-03-02 | 2016-08-31 | 杭州力龙液压有限公司 | Buffer overflow valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725814A (en) * | 2017-11-10 | 2018-02-23 | 宁波新佳行自动化工业有限公司 | One kind switchs controllable joint |
| CN107725814B (en) * | 2017-11-10 | 2023-07-04 | 宁波新佳行自动化工业有限公司 | Switch controllable joint |
| CN109236781A (en) * | 2018-11-14 | 2019-01-18 | 宁波丰州机械有限公司 | Time sequencing valve |
| CN111795033A (en) * | 2020-07-16 | 2020-10-20 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN111795033B (en) * | 2020-07-16 | 2022-06-24 | 中车青岛四方车辆研究所有限公司 | Direct-acting overflow valve |
| CN113217497A (en) * | 2021-05-24 | 2021-08-06 | 西安航天远征流体控制股份有限公司 | Plug-in type energy storage overflow valve |
| CN113217497B (en) * | 2021-05-24 | 2023-11-21 | 西安航天远征流体控制股份有限公司 | Plug-in type energy storage overflow valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106369200B (en) | 2018-07-20 |
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