CN107631065A - Constant flow valve and working method thereof - Google Patents
Constant flow valve and working method thereof Download PDFInfo
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- CN107631065A CN107631065A CN201610562801.6A CN201610562801A CN107631065A CN 107631065 A CN107631065 A CN 107631065A CN 201610562801 A CN201610562801 A CN 201610562801A CN 107631065 A CN107631065 A CN 107631065A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000013016 damping Methods 0.000 claims abstract description 14
- 239000008399 tap water Substances 0.000 claims abstract description 4
- 235000020679 tap water Nutrition 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Abstract
The invention relates to a constant flow valve and a working method thereof.A valve seat is arranged at the upper part of a valve body, and the lower part of the valve body is locked and fixed by a lower locking nut at the bottom; a valve core is arranged in the middle of the valve body, an upper valve cavity and a main spring are arranged between the valve core and the upper valve seat, a lower valve cavity is arranged between the lower part of the valve core and the lower part of the valve body, and a back pressure cavity is arranged between the bottom of the valve core and the lower locking nut; the water inlet pipe and the water outlet pipe are respectively arranged at two sides of the valve body, and the water inlet pipe is communicated with the water outlet pipe through a lower valve cavity; the upper valve cavity is communicated with an upper valve seat through a passage a, and a conical pilot valve is arranged in the upper valve seat and tightly propped against one end of the passage a; the upper valve seat is communicated with a water outlet pipe through a channel b; the valve core is communicated with the lower valve cavity through a passage d, communicated with the back pressure cavity through a passage c and communicated with the upper valve cavity through a damping hole. The invention can realize the accurate adjustment and control of the water yield of the tap water, overcome the water pressure fluctuation and keep the water yield constant; simple structure, installation convenient to use promotes the saving and the rational utilization of water resource.
Description
Technical field
The present invention relates to a kind of valve, more particularly to a kind of constant flow valve and its method of work.
Background technology
Tellurian gross amount of water resources is about 13.8 hundred million cubic kilometers, wherein 97.5% is seawater (13.45 hundred million cubic kilometers).
Fresh water only accounts for 2.5%, wherein the overwhelming majority is polar ice snow ice river and underground water, what the suitable mankind enjoyed is only 0.01%.20
In century, world population adds twice, and the mankind add 5 times with water.Many countries are faced with water resources crisis in the world：
1200000000 people's water shortages, 3,000,000,000 people lack with water hygiene facility, have 300 ten thousand to 400 ten thousand people to die from every year relevant with water
Disease.By 2025, water crisis will spread to 48 countries, and 3,500,000,000 people are tired by water.The life that water resources crisis is brought
State system deterioration and bio-diversity are destroyed, also by serious threat human survival.Official's prediction of the World Bank, in future
In 25 years " water is the same in whole world operating by image-stone oil ".Water resources in china present situation China's total water resources are 2.8 trillion
m3, occupy the 6th, the world, occupancy volume per person 2240m3, about the world per capita 1/4, occupy the 109th, the world.China
It has been put into the whole world one of 13 poor-water countries of water resource per capita.
Currently used running water tap uses rotary switch valve, and be rotated by 90 ° to open completely, and according to hydraulic pressure not
With water yield can great changes have taken place；Fine-tuned because can not realize, water yield exceedes actual demand amount in most cases；
Either directly it can all cause the waste of water resource using being used after still adjusting repeatedly.In addition, when pressure of supply water fluctuates,
Water yield is suddenly big or suddenly small, also can serious waste water resource.
The content of the invention
The invention provides a kind of constant flow valve and its method of work, and the accurate adjustment to running water output and control can be achieved
System, overcome water pressure fluctuations, keep water yield constant；Its is simple in construction, easy to install, is suitable for popularization, can promote water
The saving of resource and rationally utilization.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of constant flow valve, including valve body, upper valve base, valve element, water inlet pipe and outlet pipe；The valve body top sets upper valve
Seat, is locked, valve body lower portion is locked by the lower locking nut of bottom by the upper locking nut at top；In valve body
Portion sets valve element, and top valve pocket and main spring are set between valve element and upper valve base, portion's valve pocket is set between valve element bottom and valve body lower portion,
Back pressure cavity is set between valve element bottom and lower locking nut；Water inlet pipe and outlet pipe are separately positioned on the both sides of valve body, and water inlet pipe leads to
Cross bottom valve pocket connection outlet pipe, restricting orifice is set in the valve body before outlet pipe；Top valve pocket connects upper valve base by passage a,
Taper pilot valve is set in upper valve base to hold out against in passage a one end by pressure-regulating device；Upper valve base side is by being arranged on valve body
Interior passage b connection outlet pipes；Valve core inside connects bottom valve pocket by the passage d of level, is connected by downward passage c
Logical back pressure cavity, top valve pocket is connected by upward damping hole；Used between upper valve base and valve body, between valve element and valve body
It is tightly connected.
The pressure-regulating device is arranged on the top of upper valve base, by adjusting nut, adjusting rod, regulation top cover and regulation spring
Composition；The adjusting nut is fixedly connected with adjusting rod, and adjusting rod is connected through upper locking nut with regulation top cover, adjusting rod
It is connected between upper locking nut by threads turn；Regulation top cover is located at the top of upper valve base, and taper is connected by adjusting spring
Pilot valve；It is tightly connected between regulation top cover and upper valve base.
The position of the outlet pipe is less than water inlet pipe position, and the top of bottom valve pocket is provided with the restriction portion to contract, valve element tool
There is the shape being adapted with restriction portion.
A kind of method of work of constant flow valve, comprises the following steps：
1) running water enters from water inlet pipe, is flowed out by bottom valve pocket restriction portion, bottom valve pocket, restricting orifice from outlet pipe；
Flow through the running water of bottom valve pocket while be divided into other two-way, enter back pressure cavity through passage d, c all the way, in valve element bottom shape
Into back pressure；Another way is applied on taper pilot valve through passage d, damping hole, passage a；
2) taper pilot valve sets pressure by pressure setting device；Pressure before restricting orifice exceedes taper pilot valve
When setting pressure, taper pilot valve overcomes regulation spring effect to move up, and passage a is opened；Running water through damping hole, passage a,
Passage b reaches outlet pipe；Due to the effect of damping hole, back pressure cavity gives the upward power of valve element and gives valve element more than top valve pocket
Downward power, valve element overcome main spring effect to move up；The actual internal area of restriction portion reduces in the valve pocket of bottom, throttle orifice
Pressure before plate reduces；Until the pressure before restricting orifice is equal to the setting pressure of taper pilot valve, valve element is stable a position
Put；
3) when the pressure before restricting orifice is less than the setting pressure of taper pilot valve, work of the taper pilot valve in regulation spring
Moved down under, passage a close, back pressure cavity, the tap water pressure of top valve pocket are equal, in the presence of main spring valve element to
Lower movement, the actual internal area increase of restriction portion, makes the pressure rise before restricting orifice in the valve pocket of bottom；Until restricting orifice
When preceding pressure is equal to the setting pressure of taper pilot valve, valve element is stable a position；The pressure of running water at water inlet pipe
Less than taper pilot valve setting pressure when, valve element will move down into bottommost；
4) by step 2) and the regulation process of step 3), can in the case where constant flow valve intake pressure fluctuates,
Keep its discharge pressure stable, so that the water of outlet pipe outflow is invariable.
Constant flow valve when in use, the rear of running water pipe switch valve is arranged on along running water flow direction.
Compared with prior art, the beneficial effects of the invention are as follows：
The accurate adjustment to running water output and control can be achieved, overcome water pressure fluctuations, keep water yield constant；Its structure
Simply, it is easy to install, it is suitable for popularization, the saving of water resource can be promoted and rationally utilized.
Brief description of the drawings
Fig. 1 is the structural representation of constant flow valve of the present invention.
Fig. 2 is the schematic view of the mounting position of constant flow valve of the present invention.
In figure：1. the lower locking nuts 7. of 5. passage d of valve body 2. upper locking nut, 3. upper valve base, 4. valve element 6. enter
The taper pilot valve of 12. restriction portion of water pipe 8. outlet pipe, 9. restricting orifice, 10. main spring, 11. damping hole 13.
14. adjusting spring 15. adjusts the bottom valve pocket 20. of 18. back pressure cavity of top cover 16. adjusting rod, 17. adjusting nut 19.
The constant flow valves of I, switch valves of top valve pocket 21. passage a, 22. passage b, 23. passage c II
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of constant flow valve of the present invention, including valve body 1, upper valve base 3, valve element 4, water inlet pipe 7
With outlet pipe 8；The top of valve body 1 sets upper valve base 3, is locked by the upper locking nut 2 at top, under valve body 1
Portion is locked by the lower locking nut 6 of bottom；The middle part of valve body 1 sets valve element 4, is set between valve element 4 and upper valve base 3
Portion's valve pocket 20 and main spring 10, portion's valve pocket 19, the bottom of valve element 4 and lower locking are set between the bottom of valve element 4 and valve body lower portion
Back pressure cavity 18 is set between nut 6；Water inlet pipe 7 and outlet pipe 8 are separately positioned on the both sides of valve body 1, and water inlet pipe 7 passes through
Bottom valve pocket 19 connects outlet pipe 8, and restricting orifice 9 is set in the valve body 1 before outlet pipe 8；Top valve pocket 20 passes through passage
A21 connects upper valve base 3, and set taper pilot valve 13 in upper valve base 3 is held out against in passage a21 one end by pressure-regulating device；
The side of upper valve base 3 connects outlet pipe 8 by the passage b22 being arranged in valve body 1；Pass through the logical of level inside valve element 4
Road d5 connects bottom valve pocket 19, connects back pressure cavity 18 by downward passage c23, is connected by upward damping hole 11
Top valve pocket 20；Between upper valve base 3 and valve body 1, sealed connection is used between valve element 4 and valve body 1.
The pressure-regulating device is arranged on the top of upper valve base 3, by adjusting nut 17, adjusting rod 16, regulation top cover 15
Formed with regulation spring 14；The adjusting nut 17 is fixedly connected with adjusting rod 16, and adjusting rod 16 passes through upper locking nut
2 are connected with regulation top cover 15, are connected between adjusting rod 16 and upper locking nut 2 by threads turn；Adjust top cover 15
The top of upper valve base 3 is located at, taper pilot valve 13 is connected by adjusting spring 14；Adjust between top cover 15 and upper valve base 3
It is tightly connected.
The position of the outlet pipe 8 is less than the position of water inlet pipe 7, and the top of bottom valve pocket 19 is provided with the restriction portion to contract
12, valve element 4 has the shape being adapted with restriction portion 12.
A kind of method of work of constant flow valve, comprises the following steps：
1) running water enters from water inlet pipe 7, by bottom valve pocket restriction portion 12, bottom valve pocket 19, restricting orifice 9 from going out
Water pipe 8 flows out；Flow through the running water of bottom valve pocket 19 while be divided into other two-way, enter through passage d5, c23 carry on the back all the way
Chamber 18 is pressed, back pressure is formed in the bottom of valve element 4；Another way is applied to taper through passage d5, damping hole 11, passage a21
On pilot valve 13；
2) taper pilot valve 13 sets pressure by pressure setting device；Pressure before restricting orifice 9 exceedes taper guide
During the setting pressure of valve 13, taper pilot valve 13 overcomes the regulation effect of spring 14 to move up, and passage a21 is opened；Running water
Outlet pipe 8 is reached through passage d5, damping hole 11, passage a21, passage b22；Due to the effect of damping hole 11, the back of the body
Pressure chamber 18 gives the upward power of valve element 4 and gives valve element 4 downward power more than top valve pocket 20, and valve element 4 overcomes main spring
10 effects move up；The actual internal area of restriction portion 12 reduces in bottom valve pocket 19, the pressure drop before restricting orifice 9
It is low；Until the pressure before restricting orifice 9 is equal to the setting pressure of taper pilot valve 13, valve element 4 is stable a position；
3) when the pressure before restricting orifice 9 is less than the setting pressure of taper pilot valve 13, taper pilot valve 13 is being adjusted
Being moved down in the presence of spring 14, passage a21 is closed, and back pressure cavity 18, the tap water pressure of top valve pocket 20 are equal,
Valve element 4 moves down in the presence of main spring 10, the actual internal area increase of restriction portion 12, envoy in bottom valve pocket 19
Pressure rise before discharge orifice plate 9；Until when the pressure before restricting orifice 9 is equal to the setting pressure of taper pilot valve 13, valve
Core 4 is stable a position；When the pressure of running water is less than the setting pressure of taper pilot valve 13 at water inlet pipe 7, valve
Core 4 will move down into bottommost；
4) by step 2) and the regulation process of step 3), can in the case where constant flow valve intake pressure fluctuates,
Keep its discharge pressure stable, so that the water that outlet pipe 8 flows out is invariable.
As shown in Fig. 2 constant flow valve II is when in use, running water pipe switch valve I is arranged on along running water flow direction
Rear.Switch valve I plays open and close, it is only necessary to maximum is reached, the size of water is determined by constant flow valve II,
The improper caused water of aperture is avoided to waste.
The pressure of taper pilot valve 13, the decrement that regulation spring 14 can be adjusted by adjusting nut 13 realize, can be
Line is adjusted, and the water of outlet pipe 8 is adjusted into perfect condition, once adjustment finishes, after opening switch valve I every time, is passed through
The water yield of outlet pipe 8 is exactly relative constancy.
Restricting orifice 9 can select different specifications, so as to reach different water requirements；Contacted certainly in constant flow valve II
The part of water uses stainless steel；Main spring 10 selects the stronger material of rigidity, to reduce water yield to greatest extent
Fluctuating range.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, appoint
What those familiar with the art the invention discloses technical scope in, technique according to the invention scheme and its hair
Bright design is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (5)
1. a kind of constant flow valve, it is characterised in that including valve body, upper valve base, valve element, water inlet pipe and outlet pipe；Institute
State valve body top and set upper valve base, be locked by the upper locking nut at top, the lower locking nut that valve body lower portion passes through bottom
It is locked；Valve element is set in the middle part of valve body, sets top valve pocket and main spring between valve element and upper valve base, valve element bottom with valve body
Portion's valve pocket is set between portion, back pressure cavity is set between valve element bottom and lower locking nut；Water inlet pipe and outlet pipe are separately positioned on valve
The both sides of body, water inlet pipe connect outlet pipe by bottom valve pocket, and restricting orifice is set in the valve body before outlet pipe；Top valve pocket leads to
Passage a connection upper valve bases are crossed, set taper pilot valve in upper valve base is held out against in passage a one end by pressure-regulating device；Upper valve
Seat side connects outlet pipe by the passage b being arranged in valve body；Valve core inside connects bottom valve pocket by the passage d of level,
Back pressure cavity is connected by downward passage c, top valve pocket is connected by upward damping hole；Between upper valve base and valve body, valve
Using sealed connection between core and valve body.
2. a kind of constant flow valve according to claim 1, it is characterised in that the pressure-regulating device is arranged on
The top of upper valve base, it is made up of adjusting nut, adjusting rod, regulation top cover and regulation spring；The adjusting nut and adjusting rod
It is fixedly connected, adjusting rod is connected through upper locking nut with regulation top cover, is turned between adjusting rod and upper locking nut by screw thread
Dynamic connection；Regulation top cover is located at the top of upper valve base, and taper pilot valve is connected by adjusting spring；Adjust top cover and upper valve base it
Between be tightly connected.
A kind of 3. constant flow valve according to claim 1, it is characterised in that the position of the outlet pipe be less than into
Water pipe position, the top of bottom valve pocket are provided with the restriction portion to contract, and valve element has the shape being adapted with restriction portion.
4. the method for work of a kind of constant flow valve according to claim 1, it is characterised in that comprise the following steps：
1) running water enters from water inlet pipe, is flowed out by bottom valve pocket restriction portion, bottom valve pocket, restricting orifice from outlet pipe；
Flow through the running water of bottom valve pocket while be divided into other two-way, enter back pressure cavity through passage d, passage c all the way, under valve element
Portion forms back pressure；Another way is applied on taper pilot valve through passage d, damping hole, passage a；
2) taper pilot valve sets pressure by pressure setting device；Pressure before restricting orifice exceedes taper pilot valve
When setting pressure, taper pilot valve overcomes regulation spring effect to move up, and passage a is opened；Running water through damping hole, passage a,
Passage b reaches outlet pipe；Due to the effect of damping hole, back pressure cavity gives the upward power of valve element and gives valve element more than top valve pocket
Downward power, valve element overcome main spring effect to move up；The actual internal area of restriction portion reduces in the valve pocket of bottom, throttle orifice
Pressure before plate reduces；Until the pressure before restricting orifice is equal to the setting pressure of taper pilot valve, valve element is stable a position
Put；
3) when the pressure before restricting orifice is less than the setting pressure of taper pilot valve, work of the taper pilot valve in regulation spring
Moved down under, passage a close, back pressure cavity, the tap water pressure of top valve pocket are equal, in the presence of main spring valve element to
Lower movement, the actual internal area increase of restriction portion, makes the pressure rise before restricting orifice in the valve pocket of bottom；Until restricting orifice
When preceding pressure is equal to the setting pressure of taper pilot valve, valve element is stable a position；The pressure of running water at water inlet pipe
Less than taper pilot valve setting pressure when, valve element will move down into bottommost；
4) by step 2) and the regulation process of step 3), can in the case where constant flow valve intake pressure fluctuates,
Keep its discharge pressure stable, so that the water of outlet pipe outflow is invariable.
5. the method for work of a kind of constant flow valve according to claim 4, it is characterised in that constant flow valve exists
In use, the rear of running water pipe switch valve is arranged on along running water flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610562801.6A CN107631065B (en) | 2016-07-18 | 2016-07-18 | Constant flow valve and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610562801.6A CN107631065B (en) | 2016-07-18 | 2016-07-18 | Constant flow valve and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107631065A true CN107631065A (en) | 2018-01-26 |
| CN107631065B CN107631065B (en) | 2019-08-06 |
Family
ID=61112621
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610562801.6A Active CN107631065B (en) | 2016-07-18 | 2016-07-18 | Constant flow valve and working method thereof |
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| Country | Link |
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| CN (1) | CN107631065B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547812A (en) * | 2018-04-25 | 2018-09-18 | 王英 | Pilot-operated type flow valve |
| CN108612712A (en) * | 2018-04-10 | 2018-10-02 | 山西大学 | The electro-hydraulic proportional flow valve and control method of active pilot stage control |
| WO2020103715A1 (en) * | 2018-11-20 | 2020-05-28 | Midea Group Co., Ltd. | Method and apparatus for a manual gas valve |
| CN112610555A (en) * | 2020-12-26 | 2021-04-06 | 哈尔滨工业大学 | Quick-closing slow-opening type hydraulic priority valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0389087A (en) * | 1989-08-31 | 1991-04-15 | Komatsu Ltd | Pressure control valve |
| CN2547979Y (en) * | 2002-03-12 | 2003-04-30 | 郭崇 | Pilot pressure valve |
| CN2786391Y (en) * | 2004-12-17 | 2006-06-07 | 上海华岛液压设备制造有限公司 | Pilot-operated overflow valve |
| CN103122880A (en) * | 2011-11-18 | 2013-05-29 | 广西柳工机械股份有限公司 | Adjustable pilot reducing valve |
| CN204345010U (en) * | 2014-12-02 | 2015-05-20 | 费斯托（中国）自动化制造有限公司 | Guide's overflow-type reduction valve |
| CN104864137A (en) * | 2015-05-20 | 2015-08-26 | 安徽理工大学 | Pilot-operated type water pressure overflow valve |
| CN105605263A (en) * | 2015-11-04 | 2016-05-25 | 中国人民解放军后勤工程学院 | Pilot control branch pipeline flow stabilization regulation apparatus |
-
2016
- 2016-07-18 CN CN201610562801.6A patent/CN107631065B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0389087A (en) * | 1989-08-31 | 1991-04-15 | Komatsu Ltd | Pressure control valve |
| CN2547979Y (en) * | 2002-03-12 | 2003-04-30 | 郭崇 | Pilot pressure valve |
| CN2786391Y (en) * | 2004-12-17 | 2006-06-07 | 上海华岛液压设备制造有限公司 | Pilot-operated overflow valve |
| CN103122880A (en) * | 2011-11-18 | 2013-05-29 | 广西柳工机械股份有限公司 | Adjustable pilot reducing valve |
| CN204345010U (en) * | 2014-12-02 | 2015-05-20 | 费斯托（中国）自动化制造有限公司 | Guide's overflow-type reduction valve |
| CN104864137A (en) * | 2015-05-20 | 2015-08-26 | 安徽理工大学 | Pilot-operated type water pressure overflow valve |
| CN105605263A (en) * | 2015-11-04 | 2016-05-25 | 中国人民解放军后勤工程学院 | Pilot control branch pipeline flow stabilization regulation apparatus |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612712A (en) * | 2018-04-10 | 2018-10-02 | 山西大学 | The electro-hydraulic proportional flow valve and control method of active pilot stage control |
| CN108547812A (en) * | 2018-04-25 | 2018-09-18 | 王英 | Pilot-operated type flow valve |
| CN108547812B (en) * | 2018-04-25 | 2019-12-03 | 林驰杰 | Pilot-operated type flow valve |
| WO2020103715A1 (en) * | 2018-11-20 | 2020-05-28 | Midea Group Co., Ltd. | Method and apparatus for a manual gas valve |
| US11125443B2 (en) | 2018-11-20 | 2021-09-21 | Midea Group Co., Ltd. | Method and apparatus for a manual gas valve |
| US11761637B2 (en) | 2018-11-20 | 2023-09-19 | Midea Group Co., Ltd. | Method and apparatus for a manual gas valve |
| CN112610555A (en) * | 2020-12-26 | 2021-04-06 | 哈尔滨工业大学 | Quick-closing slow-opening type hydraulic priority valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107631065B (en) | 2019-08-06 |
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