CN106051171A - Pressure self-balanced type stop check valve - Google Patents
Pressure self-balanced type stop check valve Download PDFInfo
- Publication number
- CN106051171A CN106051171A CN201610400606.3A CN201610400606A CN106051171A CN 106051171 A CN106051171 A CN 106051171A CN 201610400606 A CN201610400606 A CN 201610400606A CN 106051171 A CN106051171 A CN 106051171A
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- CN
- China
- Prior art keywords
- valve
- piston
- piston cylinder
- medium
- pressure self
- 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.)
- Pending
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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
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
- F16K39/022—Devices for relieving the pressure on the sealing faces for lift valves using balancing surfaces
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- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a pressure self-balanced type stop check valve. The pressure self-balanced type stop check valve comprises a valve body, a valve clack, a valve rod and a valve deck. A liquid inlet and a liquid return hole are formed in the valve body. The valve body is internally provided with a piston and a piston cylinder. The valve rod is sleeved with both the piston and the piston cylinder. A balance cavity is formed between the piston and the piston cylinder. A flow guide channel enabling the liquid inlet to communicate with the balance cavity is formed in the valve body. The radial cross-section size of the balance cavity is equal to the intermediate diameter size of a sealing face of a valve seat. In the state when a medium enters the balance cavity along the flow guide channel, the medium squeezes the piston downwards; the piston drives the valve rod to move downwards, and thus a downward pressing force is applied to the valve clack; and the pressing force equals to upward medium force borne by the bottom of the valve clack, the pressing force and the medium force offset each other, and self-balancing of pressure applied by the medium to the valve clack is achieved. By means of the pressure self-balanced type stop check valve, the medium pressure acted on the valve clack can be balanced automatically on the basis of the pressure self-balancing principle, and thus influence of the medium pressure on operating performance and sealing quality of the valve is eliminated fundamentally.
Description
Technical field
The present invention relates to valve technology field, concretely relate to one and be applicable to conduct under high pressure, big orifice environment
Block or the pressure self-balancing formula screw down nonreturn valve of backflow moving medium pipeline.
Background technology
Screw down nonreturn valve refers to that flap moves along valve seat centrage, the valve rod valve that be connected unfixing with flap.Have concurrently and cut
Only valve and return valve function, when general who has surrendered's flap is pressed on valve seat under valve rod, play stop valve effect；After valve rod rises, start-stop
Return valve action.
Owing in its opening-closing process, between sealing surface, frictional force is little, life-span length, Lift are little, low cost of manufacture, maintenance
The advantages such as convenience, and it is widely used in the fields such as petrochemical industry, boats and ships, power station, metallurgy.Due to existing cut-off non-return valve technology
Product mainly includes valve body, flap, valve rod, valve gap etc., and the screw down nonreturn valve of this structure is when closing valve, owing to flap bears
The impact of valve body inlet pressure, causes valve closing difficulty.Its degree of difficulty is led to rising and the valve of pipeline medium pressure
The increase in footpath and aggravate.Have a strong impact on sealing property and the operability of valve, also constrain screw down nonreturn valve at high pressure, big orifice
Application on pipeline.
Summary of the invention
It is an object of the invention to provide a kind of workable, seal reliable pressure self-balancing formula screw down nonreturn valve,
To meet high pressure, the use demand of big orifice flow media pipeline screw down nonreturn valve.
For achieving the above object, the technical solution adopted in the present invention is: a kind of pressure self-balancing formula screw down nonreturn valve, bag
Including valve body, flap, valve rod and valve gap, valve body is respectively equipped with the inlet opening and hole for back flow being interconnected with its chamber, valve gap can
Dismountable is arranged on the upper surface of valve body, and valve rod one end is connected with flap after valve gap, and flap is located in the chamber of valve body
And can pump to control the keying of liquid feeding end with valve rod, constitute between the valve seat and the flap that arrange in the inner chamber of valve body
One sealing pair；
It is provided with piston and piston cylinder, piston and piston cylinder in described valve body to be all set on valve rod, the side end face of piston cylinder and valve
Body is fixing to be connected, and constitutes and be slidably matched between piston cylinder and valve rod, and piston is positioned at piston cylinder can be upper and lower along piston cylinder inwall
Move back and forth；
Form a counter balance pocket between described piston and piston cylinder, valve body offers conducting inlet opening logical to the water conservancy diversion of this counter balance pocket
Road, the radial section size of counter balance pocket is equal sized with sealing surface of seat central diameter, enters in counter balance pocket along flow-guiding channel at medium
State under, medium is pressed down against piston, and piston driving valve rod moves downward thus grants the thrust that flap one is downward, this pressure
The medium power upwards being subject to bottom clamp force and flap is equal in magnitude and cancels out each other, it is achieved medium to the pressure of flap from flat
Weighing apparatus.
As improving further, described piston cylinder offering through hole, one end of through hole connects with counter balance pocket, through hole
The other end connects with flow-guiding channel.
As improving further, described valve body offers cannelure, ring in the position connecting through hole and flow-guiding channel
The aperture of shape groove and through hole is all higher than the aperture of flow-guiding channel.
As improving further, described through hole is the uniform multiple small sircle holes being arranged on piston cylinder side, Duo Ge little
Circular hole and flow-guiding channel are for introducing medium in counter balance pocket.
As improving further, described piston cylinder is provided with the leak detection groove for checking leakage at the faying face of valve gap.
As improving further, the upper surface of described piston cylinder closely cooperates with valve gap.
As improving further, between described piston cylinder and piston, valve body, valve rod, it is equipped with sealing ring.
As improving further, between described valve rod and piston, it is provided with sealing ring.
As improving further, between described flap and valve rod, use matched in clearance.
As improving further, between described valve rod and piston, use matched in clearance.
Compared with prior art, the invention have the benefit that
1, the pressure self-balancing formula screw down nonreturn valve of the present invention can pass through pressure self-balancing principle, makes Jie acting on flap
Matter automatic pressure-balancing, thus fundamentally eliminating pressure medium to valve operation performance and the impact of airtight quality；
2, the pressure self-balancing formula screw down nonreturn valve of the present invention has compact conformation, keying moment is little, workable, sealing can
The feature such as lean on, meet high pressure, the use requirement of big orifice flow media pipeline screw down nonreturn valve.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Labelling in figure: 1, valve body, 101, inlet opening, 102, valve seat, 103, hole for back flow, 104, flow-guiding channel, 105, annular
Groove, 2, flap, 3, valve rod, 4, piston, 5, piston cylinder, 6, valve gap, 7, securing member, 8, sealing ring.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
As it is shown in figure 1, a kind of pressure self-balancing formula screw down nonreturn valve, including valve body 1, flap 2, valve rod 3 and valve gap 6, valve
Being respectively equipped with the inlet opening 101 and hole for back flow 103 being interconnected with its chamber on body 1, valve gap 6 is detachable by securing member 7
Being arranged on the upper surface of valve body 1, valve rod 3 one end is connected with flap 2 after valve gap 6, between using between valve rod 3 and flap 2
Gap coordinates, in flap 2 is located at the chamber of valve body and can pump to control with valve rod 3 keying of liquid feeding end, valve body 1
A sealing pair is constituted between the valve seat 102 and the flap 2 that arrange in inner chamber.
It is provided with piston 4 and piston cylinder 5, piston 4 and piston cylinder 5 in valve body 1 to be all set on valve rod 3, the side of piston cylinder 5
Face is fixing with valve body 1 to be connected, and the upper surface of piston cylinder 5 closely cooperates with valve gap 6, constitutes slip and join between piston cylinder 5 and valve rod 3
Closing, piston 4 is positioned at piston cylinder 5 and can pump along piston cylinder 5 inwall.
A counter balance pocket is formed between piston 4 and piston cylinder 5, the cavity that counter balance pocket is piston 4 and piston cylinder 5 surrounds, valve
Conducting inlet opening is offered to the flow-guiding channel 104 of this counter balance pocket, the radial section size of counter balance pocket and sealing surface of seat on body 1
Central diameter is equal sized, and wherein, the external diameter of the sealing surface of seat i.e. sealing surface of seat of central diameter size and the meansigma methods of internal diameter, on medium edge
Flow-guiding channel 104 enters under the state in counter balance pocket, and medium is pressed down against piston 4, piston 4 band ovable valve stem 3 move downward thus
Granting the thrust that flap 2 one is downward, the medium power upwards being subject to bottom this thrust and flap 2 forms a pair size phase
Deng, the axial force cancelled out each other, it is achieved that the medium pressure self-balancing to flap 2.
Offering through hole on piston cylinder 5, one end of through hole connects with counter balance pocket, the other end of through hole and flow-guiding channel 104
Connection.
Cannelure 105, cannelure 105 and through hole is offered in the position connecting through hole and flow-guiding channel 104 on valve body 1
Aperture is all higher than the aperture of flow-guiding channel 104.Cannelure 105 is easy to medium and is imported smoothly in counter balance pocket.
As improving further, described through hole can also be the uniform multiple small sircle holes being arranged on piston cylinder 5 side,
Multiple small sircle holes and flow-guiding channel 104 are for introducing medium smoothly in counter balance pocket.
Piston cylinder 5 is provided with, at the faying face of valve gap 4, the leak detection groove whether leaked for Detecting medium.
It is equipped with sealing ring 8 between piston cylinder 5 and piston 4, valve body 1, valve rod 3, between valve rod 3 and piston 4, is provided with sealing
Circle 8.
Valve rod 3 and piston 4 use matched in clearance.
It it is sphere-contact between valve rod 3 head and flap 2.
The flap of the present invention uses streamlined structure design, advantageously reduces valve flow resistance coefficient.
Valve body 1 can use through type or angie type structure, and flow-guiding channel 104 is machining on valve body, flow-guiding channel end
Mouth soldering and sealing after completing machining.
Pressure self-balancing formula screw down nonreturn valve of the present invention can use rotation and lifting to open and close or vertical lift opens and closes.
The operation principle of pressure self-balancing of the present invention is as follows:
When pressure medium is from inlet opening 101, pressure medium is introduced in counter balance pocket by the flow-guiding channel 104 on valve body 1, piston
4 by downward medium power, and flap 2 is formed by the medium power upwards being subject to bottom the downward thrust of piston 4 and flap 2
A pair axial force equal in magnitude, that cancel out each other, it is achieved that the medium pressure self-balancing to flap 2.So the present invention can realize
The pressure self-balancing of valve.The present invention is more laborsaving during closing valve.
During valve opening and closing, piston 4 moves back and forth in piston cylinder 5, and centre seals by sealing ring 8；Piston cylinder 5 is fixed on valve
Between body 1 and valve gap 6, seal by sealing ring 8 between piston cylinder 5 and valve body 1；Valve body 1 and valve gap 6 are flange connection type, lean on
Securing member 7 is fixed.During valve closing, handwheel or actuator band ovable valve stem 3 moving down, 3 power of valve rod pass to flap
2, complete the closing motion of valve；During valve opening, handwheel or actuator band ovable valve stem 3 move up, in medium power
Under effect, flap 2 moves up along valve rod 3, thus realizes valve opening action.
Claims (10)
1. a pressure self-balancing formula screw down nonreturn valve, including valve body, flap, valve rod and valve gap, valve body is respectively equipped with and it
Inlet opening that chamber is interconnected and hole for back flow, on the detachable upper surface being arranged on valve body of valve gap, valve rod one end passes valve
It is connected with flap after lid, in flap is located at the chamber of valve body and can pump to control with valve rod the keying of liquid feeding end,
A sealing pair is constituted between the valve seat and the flap that arrange in the inner chamber of valve body, it is characterised in that:
It is provided with piston and piston cylinder, piston and piston cylinder in described valve body to be all set on valve rod, the side end face of piston cylinder and valve
Body is fixing to be connected, and constitutes and be slidably matched between piston cylinder and valve rod, and piston is positioned at piston cylinder can be upper and lower along piston cylinder inwall
Move back and forth；
Form a counter balance pocket between described piston and piston cylinder, valve body offers conducting inlet opening logical to the water conservancy diversion of this counter balance pocket
Road, the radial section size of counter balance pocket is equal sized with sealing surface of seat central diameter, enters in counter balance pocket along flow-guiding channel at medium
State under, medium is pressed down against piston, and piston driving valve rod moves downward thus grants the thrust that flap one is downward, this pressure
The medium power upwards being subject to bottom clamp force and flap is equal in magnitude and cancels out each other, it is achieved medium to the pressure of flap from flat
Weighing apparatus.
A kind of pressure self-balancing formula screw down nonreturn valve the most according to claim 1, it is characterised in that: open on described piston cylinder
Being provided with through hole, one end of through hole connects with counter balance pocket, and the other end of through hole connects with flow-guiding channel.
A kind of pressure self-balancing formula screw down nonreturn valve the most according to claim 2, it is characterised in that: even on described valve body
Connect the position of hole and flow-guiding channel to offer the aperture of cannelure, cannelure and through hole and be all higher than the aperture of flow-guiding channel.
4. according to a kind of pressure self-balancing formula screw down nonreturn valve described in Claims 2 or 3, it is characterised in that: described through hole
For the uniform multiple small sircle holes being arranged on piston cylinder side, multiple small sircle holes and flow-guiding channel are for introducing counter balance pocket by medium
In.
A kind of pressure self-balancing formula screw down nonreturn valve the most according to claim 4, it is characterised in that: described piston cylinder and valve
It is provided with the leak detection groove for checking leakage at the faying face of lid.
6. according to a kind of pressure self-balancing formula screw down nonreturn valve described in claim 3 or 5, it is characterised in that: described piston cylinder
Upper surface closely cooperate with valve gap.
A kind of pressure self-balancing formula screw down nonreturn valve the most according to claim 6, it is characterised in that: described piston cylinder and work
It is equipped with sealing ring between plug, valve body, valve rod.
8. according to a kind of pressure self-balancing formula screw down nonreturn valve described in claim 5 or 7, it is characterised in that: described valve rod with
Sealing ring it is provided with between piston.
A kind of pressure self-balancing formula screw down nonreturn valve the most according to claim 8, it is characterised in that: described flap and valve rod
Between use matched in clearance.
10. according to a kind of pressure self-balancing formula screw down nonreturn valve described in claim 7 or 9, it is characterised in that: described valve rod with
Matched in clearance is used between piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610400606.3A CN106051171A (en) | 2016-06-08 | 2016-06-08 | Pressure self-balanced type stop check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610400606.3A CN106051171A (en) | 2016-06-08 | 2016-06-08 | Pressure self-balanced type stop check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106051171A true CN106051171A (en) | 2016-10-26 |
Family
ID=57169967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610400606.3A Pending CN106051171A (en) | 2016-06-08 | 2016-06-08 | Pressure self-balanced type stop check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106051171A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300020A (en) * | 2017-07-19 | 2017-10-27 | 武汉武船机电模块有限责任公司 | A kind of electro-hydraulic hull valve |
| CN107314119A (en) * | 2017-07-19 | 2017-11-03 | 武汉武船机电模块有限责任公司 | A kind of hull valve |
| CN107339442A (en) * | 2017-07-19 | 2017-11-10 | 武汉武船机电模块有限责任公司 | A kind of kingston valve |
| CN107461502A (en) * | 2017-09-27 | 2017-12-12 | 中国舰船研究设计中心 | A kind of valve of balance cavity type for ship draining system clack box |
| CN107542938A (en) * | 2017-07-19 | 2018-01-05 | 武汉武船机电模块有限责任公司 | A kind of hull valve |
| WO2018169698A1 (en) * | 2017-03-16 | 2018-09-20 | Fisher Controls International Llc | Valve with integral balancing passage |
| CN108644397A (en) * | 2018-08-08 | 2018-10-12 | 百强阀门集团有限公司 | Depressurize shut-off valve |
| CN109058003A (en) * | 2018-07-27 | 2018-12-21 | 潍柴动力股份有限公司 | A kind of EGR valve and gas recirculation system |
| CN109723829A (en) * | 2018-12-29 | 2019-05-07 | 贵州航天凯山石油仪器有限公司 | A kind of sound source control valve of high-pressure gas well liquid level self-operated measuring unit |
| CN110005861A (en) * | 2019-05-17 | 2019-07-12 | 深圳市苍泰科技有限公司 | A kind of solenoid valve block for pressure control |
| CN110359996A (en) * | 2018-03-26 | 2019-10-22 | 株式会社斯巴鲁 | Vehicle cooling system |
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| FR2029742A1 (en) * | 1969-01-31 | 1970-10-23 | Fisher Controls Co | |
| US5277403A (en) * | 1993-05-12 | 1994-01-11 | Dresser-Rand Company | Balanced, steam control valve assembly, and a plug-type valving element therefor |
| CN2564802Y (en) * | 2002-08-21 | 2003-08-06 | 周君 | Hydraulic and air pressure self-balance stop valve |
| CN2637835Y (en) * | 2003-08-27 | 2004-09-01 | 南京理工大学 | Hydraulic, air pressure self-balancing stop valve |
| CN103939649A (en) * | 2014-04-03 | 2014-07-23 | 浙江方众阀门有限公司 | Self-operated stop valve |
| CN104791501A (en) * | 2015-04-29 | 2015-07-22 | 中国船舶重工集团公司第七二五研究所 | Bi-directional pressure self-balancing type stop valve |
| CN204692595U (en) * | 2015-05-28 | 2015-10-07 | 常州埃姆基冷冻设备有限公司 | Industrial refrigeration right-angle type screw down nonreturn valve |
| CN105020466A (en) * | 2014-04-25 | 2015-11-04 | 济南大学 | High-pressure valve achieving automatic sealing |
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- 2016-06-08 CN CN201610400606.3A patent/CN106051171A/en active Pending
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| FR2029742A1 (en) * | 1969-01-31 | 1970-10-23 | Fisher Controls Co | |
| US5277403A (en) * | 1993-05-12 | 1994-01-11 | Dresser-Rand Company | Balanced, steam control valve assembly, and a plug-type valving element therefor |
| CN2564802Y (en) * | 2002-08-21 | 2003-08-06 | 周君 | Hydraulic and air pressure self-balance stop valve |
| CN2637835Y (en) * | 2003-08-27 | 2004-09-01 | 南京理工大学 | Hydraulic, air pressure self-balancing stop valve |
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| CN105020466A (en) * | 2014-04-25 | 2015-11-04 | 济南大学 | High-pressure valve achieving automatic sealing |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10359118B2 (en) | 2017-03-16 | 2019-07-23 | Fisher Controls International Llc | Valve with integral balancing passage |
| WO2018169698A1 (en) * | 2017-03-16 | 2018-09-20 | Fisher Controls International Llc | Valve with integral balancing passage |
| CN108626404A (en) * | 2017-03-16 | 2018-10-09 | 费希尔控制产品国际有限公司 | Valve with whole machine balancing access |
| CN108626404B (en) * | 2017-03-16 | 2022-06-07 | 费希尔控制产品国际有限公司 | Valve with integral balancing passage |
| RU2766162C2 (en) * | 2017-03-16 | 2022-02-08 | Фишер Контролз Интернешнел Ллс | Valve with built-in balancing channel |
| CN107314119A (en) * | 2017-07-19 | 2017-11-03 | 武汉武船机电模块有限责任公司 | A kind of hull valve |
| CN107339442A (en) * | 2017-07-19 | 2017-11-10 | 武汉武船机电模块有限责任公司 | A kind of kingston valve |
| CN107542938A (en) * | 2017-07-19 | 2018-01-05 | 武汉武船机电模块有限责任公司 | A kind of hull valve |
| CN107300020A (en) * | 2017-07-19 | 2017-10-27 | 武汉武船机电模块有限责任公司 | A kind of electro-hydraulic hull valve |
| CN107461502A (en) * | 2017-09-27 | 2017-12-12 | 中国舰船研究设计中心 | A kind of valve of balance cavity type for ship draining system clack box |
| CN110359996A (en) * | 2018-03-26 | 2019-10-22 | 株式会社斯巴鲁 | Vehicle cooling system |
| US11305637B2 (en) | 2018-03-26 | 2022-04-19 | Subaru Corporation | Vehicle cooling system |
| CN110359996B (en) * | 2018-03-26 | 2022-04-26 | 株式会社斯巴鲁 | Cooling system for vehicle |
| CN109058003A (en) * | 2018-07-27 | 2018-12-21 | 潍柴动力股份有限公司 | A kind of EGR valve and gas recirculation system |
| CN108644397A (en) * | 2018-08-08 | 2018-10-12 | 百强阀门集团有限公司 | Depressurize shut-off valve |
| CN109723829A (en) * | 2018-12-29 | 2019-05-07 | 贵州航天凯山石油仪器有限公司 | A kind of sound source control valve of high-pressure gas well liquid level self-operated measuring unit |
| CN109723829B (en) * | 2018-12-29 | 2020-07-14 | 贵州航天凯山石油仪器有限公司 | Sound source control valve for automatic liquid level measuring device of high-pressure gas well |
| CN110005861A (en) * | 2019-05-17 | 2019-07-12 | 深圳市苍泰科技有限公司 | A kind of solenoid valve block for pressure control |
| CN110005861B (en) * | 2019-05-17 | 2024-01-02 | 深圳市蓝谷智能装备研发有限公司 | Electromagnetic valve group for pressure control |
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Application publication date: 20161026 |
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| RJ01 | Rejection of invention patent application after publication |