CN108506544A - Pressure-adjustable high-pressure water pressure-reducing valve - Google Patents
Pressure-adjustable high-pressure water pressure-reducing valve Download PDFInfo
- Publication number
- CN108506544A CN108506544A CN201810384644.3A CN201810384644A CN108506544A CN 108506544 A CN108506544 A CN 108506544A CN 201810384644 A CN201810384644 A CN 201810384644A CN 108506544 A CN108506544 A CN 108506544A
- Authority
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- China
- Prior art keywords
- pressure
- reducing valve
- pressure reducing
- seal set
- shaft
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 230000035882 stress Effects 0.000 description 7
- 239000003245 coal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention relates to the field of valve bodies, in particular to a pressure-adjustable high-pressure water pressure reducing valve, wherein a rigid sealing sleeve is made of 1Cr18Ni9Ti, is corrosion-resistant and high in strength, is not easy to damage and lose efficacy due to high pressure, can still accurately regulate pressure in a severe working environment, and ensures the normal use of the pressure-adjustable high-pressure water pressure reducing valve. Through the compensation regulation effect of communicating pipe for this pressure-adjustable formula high-pressure water relief pressure valve can come the motion of automatically regulated case axle according to the pressure variation of exit end automatically, so that keep invariable this pressure-adjustable formula high-pressure water relief pressure valve outlet pressure invariable, reduce the work burden that manual regulation caused for the workman.
Description
Technical field
The present invention relates to valve body field, especially a kind of pressure adjustable type high pressure Pressure reducing valve for hot water.
Background technology
Adjustable high-voltage Pressure reducing valve for hot water is that one kind is cooled down for mine shearer high pressure external spraying and motor low pressure
Water common pall and a high pressure water pressure reducing valve specially designed, because of coal working face and the synchronization-moving cable clip space of coal machine
It is limited, water-intake pipe the high-pressure fog pipeline for not having redundant space to add a KJ25 on one side walk cable while, many treating flour dusts
Unit is all a piece KJ16 water pipe (because not entering without the big water pipe plug of redundant space) of increase beside original coal machine cooling water,
Because cable clip it is irregular, with cable Cao jaggy in move back and forth the high-pressure water pipe of several days KJ16 that have more than is needed and be just pulled off
Or drawing quick-fried makes system can not work normally；Ad hoc a adjustable high-voltage Pressure reducing valve for hot water of meter realizes that a water pipe can be real thus
Existing high-pressure fog can make cooling water to coal machine cylinder electric motor temperature reduction again.In the prior art, usually have using thin film pressure reducing valve, because
The purpose of adjusting control pressure reducing valve poppet shaft movement is played in effect for thin film pressure reducing valve by air pressure on film, but thin
Film is due to the property of itself, the limited pressure that can be born, under the action of high pressure water quickly will aging, influence the essence of pressure regulation
Degree, What is more can there is a phenomenon where films to be destroyed so that the range of pressure regulation is limited, be not suitable for needing high pressure water
Field.
Invention content
In view of the problems of the existing technology, can make under conditions of high pressure water the purpose of the present invention is to provide a kind of
With, and can guarantee the pressure adjustable type high pressure Pressure reducing valve for hot water of regulation precision, to achieve the goals above, the skill that the present invention uses
Art scheme is：
A kind of pressure-adjustable high pressure Pressure reducing valve for hot water, including：
Pressure reducing valve casing, the pressure reducing valve casing have inlet end and an outlet end, and the pressure reducing valve casing bottom is provided with
Sealing cover, the pressure reducing valve casing middle part are provided with plunger shaft, and the plunger shaft is divided at the top of plunger shaft, is in the middle part of plunger shaft and living
Bottom of chamber portion is filled in, the piston cavity bottom is provided with counterbalance spring, and the counterbalance spring bottom is connect with the sealing cover, described
It is connect with locking nut at the top of counterbalance spring, the plunger shaft bottom is provided with conical section with junction in the middle part of the plunger shaft；
Rigid seal set is provided at the top of the plunger shaft, rigid seal set top is provided with stepped hole；The outlet end is set
It is equipped with connecting pipe, the connecting pipe is connected to the space between bottom end and rigid seal set at the top of the plunger shaft；
Poppet shaft is bolted with secondary seal set in the poppet shaft, stress step, the valve is provided on the secondary seal set inner wall
The rigid seal set, rigid seal set bottom is passed through to put on the stress step with the secondary seal and connect at the top of mandrel
It touches, the poppet shaft lower end is spirally connected with the locking nut, is also socketed successively upwards from the locking nut in the poppet shaft
There is column sealed and sealing element interstage sleeve；Compressed spring, compressed spring top connecting spring inner sleeve, the compressed spring lower end
Coordinate with the stepped hole, set upper side is connected with pressure adjusting screw in the spring, can adjust the deformation of the compressed spring
Degree, to push the rigid seal set to move downward；End cap, the end cap are connected to the top of the pressure reducing valve casing,
The pressure adjusting screw passes through the end cap, the compressed spring to be arranged in the end cap.Due to using rigid seal set,
The material of the rigid seal set uses 1Cr18Ni9Ti, and corrosion-resistant, intensity is higher, is not easy to damage because of higher pressure
Evil and failure, in severe working environment still can accurate pressure regulation, ensureing this pressure adjustable type high pressure water pressure reducing valve just
It is often used.And the regulating and compensating role for passing through connecting pipe so that this pressure adjustable type high pressure water pressure reducing valve can be automatically according to going out
The pressure change at mouth end carrys out the movement of automatic adjusting spool axis, so that this pressure adjustable type high pressure water pressure reducing valve kept constant
Outlet pressure is constant, reduces manual adjustment to work load caused by worker.
Preferably, the end cap top side detachable is provided with protective case, and the pressure adjusting screw is set to the guarantor
In sheath, the pressure adjusting screw can be protected not by damage, and can prevent from corroding.
Preferably, it is connected with flange-interface on the input end and the outlet end, it is convenient to be attached with other pipelines.
Preferably, sealing ring, the secondary seal set are provided between the rigid seal set and the pressure reducing valve casing
It is equipped with the first sealing ring between shell, the second sealing ring is provided between the poppet shaft and rigid seal set, it is described
It is provided with third sealing ring between poppet shaft and secondary seal set, is arranged between the poppet shaft and the sealing element interstage sleeve
There is the 4th sealing ring.It can ensure sealing performance.
Preferably, the end cap is connected by screw on the pressure reducing valve casing, is facilitated and is replaced.
Preferably, it is provided with venthole on the end cap, facilitates the pressure adjusting screw that the compression bullet is adjusted
Spring.
Operation principle；
Before this pressure reducing valve is to open, since the poppet shaft is under the elastic force effect of the counterbalance spring at pressure reducing valve
In closed state；After pressure water enters from input end, because of the secondary seal set of spool both ends setting and column sealed face
The equal suffered amount of force equal direction of product is offset on the contrary, so pressure reducing valve is in closed state.When pressure reducing valve rear end
Need the water of M pressure values for seasonable, adjusting pressure adjusting screw observes the pressure value in the pipeline of rear end when pressure reaches M values
Stop adjusting, in normal operation, outlet end water flow reduces, and hydraulic pressure can increase suddenly in the pipeline of rear, and high pressure water will
The space at the top of the rigid seal set and the plunger shaft between bottom end is flowed by the connecting pipe, pushes the rigidity
Sealing shroud moves up, and to push the compressed spring to move up, this when puts on stress due to the secondary seal
The power that step is subject to weakens, and the described column sealed and sealing element interstage sleeve power that passes to of the counterbalance spring does not change,
Therefore power up is more than downward power, to push the poppet shaft to move upwards, to reduce liquid from the input end
Flowing to the outlet end, or even close this pressure reducing valve.
When the run-off in the pipeline of rear end becomes larger suddenly, under the hydraulic pressure in the outlet end can become, the communicating pipe
Water in road can flow into the outlet end, at this time due to the sky between bottom end at the top of rigid seal set and the plunger shaft
Between can restore deformation downwards due to the support without water, the compressed spring, push the rigid seal set to move downward, will
Downward force effect pushes the poppet shaft to move downward on the stress ladder of second sealing shroud, and then pushes and justify
Column sealing and the sealing element interstage sleeve move downward, and increase flow of the high pressure water from the input end to outlet end so that described
The hydraulic pressure of outlet end keeps constant state.
The beneficial effects of the invention are as follows：
The material of a kind of heretofore described pressure adjustable type high pressure Pressure reducing valve for hot water, the rigid seal set uses
1Cr18Ni9Ti, corrosion-resistant, intensity is higher, is not easy to occur to damage because of higher pressure and fail, in severe building ring
In border still can accurate pressure regulation, ensure the normal use of this pressure adjustable type high pressure water pressure reducing valve.
Pass through the regulating and compensating role of connecting pipe so that this pressure adjustable type high pressure water pressure reducing valve can be automatically according to outlet
The pressure change at end carrys out the movement of automatic adjusting spool axis, so that this pressure adjustable type high pressure water pressure reducing valve kept constant goes out
Mouth pressure is constant, reduces manual adjustment to work load caused by worker.
Description of the drawings
Fig. 1 is the schematic diagram of pressure adjustable type high pressure Pressure reducing valve for hot water of the present invention；
Fig. 2 is pressure adjustable type high pressure Pressure reducing valve for hot water rigid seal set of the present invention, secondary seal set, poppet shaft, sealing
The schematic diagram of part interstage sleeve and column sealed socket；
Fig. 3 is the schematic diagram of pressure adjustable type high pressure Pressure reducing valve for hot water shell of the present invention；
It is marked in figure：1- flange-interfaces, 2- pressure reducing valve casings, 221- plunger shafts top, 222- plunger shafts middle part, 223- live
Fill in bottom of chamber portion, 224- connecting pipes, 4- screws, 7- end caps, 8- protective cases, 9- pressure adjusting screws, 10- spring inner sleeves, 11- pressures
Contracting spring, 12- rigid seal sets, 121- stepped holes, 13- sealing rings, the first sealing rings of 131-, the second sealing rings of 132-, 133-
Third sealing ring, the 4th sealing rings of 134-, 16- secondary seal sets, 161- stress steps, 17- poppet shafts, 19- sealing element interstage sleeves,
20- is column sealed, 21- locking nuts, 22- counterbalance springs, 23- sealing covers, 24- ventholes.
Specific implementation mode
With reference to embodiment and specific implementation mode, the present invention is described in further detail.But this should not be understood
It is only limitted to embodiment below for the range of the above-mentioned theme of the present invention, the technology that all invention contents based on the present invention are realized is equal
Belong to the scope of the present invention.
Embodiment 1
A kind of pressure-adjustable high pressure Pressure reducing valve for hot water as shown in Figs. 1-3, including：
Pressure reducing valve casing 2, the pressure reducing valve casing 2 have inlet end and an outlet end, the setting of 2 bottom of the pressure reducing valve casing
There are sealing cover 23,2 middle part of the pressure reducing valve casing to be provided with plunger shaft, the plunger shaft is divided into 221, plunger shaft at the top of plunger shaft
Middle part 222 and plunger shaft bottom 223, the piston cavity bottom are provided with counterbalance spring 23,23 bottom of the counterbalance spring with
The sealing cover 23 connects, and 23 top of the counterbalance spring is connect with locking nut 21, the plunger shaft bottom 223 and the work
222 junctions are provided with conical section in the middle part of plug chamber；Rigid seal set 12, the rigidity are provided in 221 at the top of the plunger shaft
12 top of sealing shroud is provided with stepped hole 121；The outlet end is provided with connecting pipe 224, and the connecting pipe 224 is connected to
Space at the top of the plunger shaft between 221 bottom ends and rigid seal set 12；Poppet shaft 17 is spirally connected in the poppet shaft 17
There is secondary seal to cover 16, the secondary seal, which covers, is provided with stress step 161 on 16 inner walls, 17 top of the poppet shaft passes through institute
Rigid seal set 12 is stated, the rigid seal covers 12 bottoms and contacted with the stress step 161 on secondary seal set 16, institute
It states 17 lower end of poppet shaft to be spirally connected with the locking nut 21, also be covered successively upwards from the locking nut 21 in the poppet shaft 17
It is connected to column sealed 20 and sealing element interstage sleeve 19；Compressed spring 11,11 top connecting spring inner sleeve 10 of the compressed spring are described
11 lower end of compressed spring coordinates with the stepped hole 121, and 10 upper end of spring inner sleeve is connected with pressure adjusting screw 9, can adjust
The deformation degree for saving the compressed spring 11, to push the rigid seal set 12 to move downward；End cap 7, the end cap 7 connect
It is connected on the top of the pressure reducing valve casing 2, the pressure adjusting screw 9 passes through the end cap 7, the setting of the compressed spring 11 to exist
In the end cap 7.Due to covering 12 using rigid seal, the material of the rigid seal set 12 uses 1Cr18Ni9Ti, corrosion-resistant,
Intensity is higher, is not easy to occur to damage because of higher pressure and fail, still can accurately be adjusted in severe working environment
Pressure, ensures the normal use of this pressure adjustable type high pressure water pressure reducing valve.And by the regulating and compensating role of connecting pipe 224, make
The movement of automatic adjusting spool axis 17 can be carried out automatically according to the pressure change of outlet end by obtaining this pressure adjustable type high pressure water pressure reducing valve,
So that this pressure adjustable type high pressure water decompression valve outlet pressure kept constant is constant, manual adjustment is reduced to caused by worker
Work load.
Preferably, 7 top side detachable of the end cap is provided with protective case 8, and the pressure adjusting screw 9 is set to described
In protective case 8, the pressure adjusting screw 9 can be protected not by damage, and can prevent from corroding.
Preferably, it is connected with flange-interface 1 on the input end and the outlet end, it is convenient to be connected with other pipelines
It connects.
Preferably, it is provided with sealing ring 13 between the rigid seal set 12 and the pressure reducing valve casing 2, the two level is close
It is equipped with the first sealing ring 131 between big envelope 16 and shell 2, the is provided between the poppet shaft 17 and rigid seal set 12
Two sealing rings 132 are provided with third sealing ring 133, the poppet shaft between the poppet shaft 17 and secondary seal set 16
It is provided with the 4th sealing ring 134 between 17 and the sealing element interstage sleeve 19.It can ensure sealing performance.
Preferably, the end cap 7 is connected to by screw 4 on the pressure reducing valve casing 2, is facilitated and is replaced.
Preferably, it is provided with venthole 24 on the end cap 7, facilitates the pressure adjusting screw 9 that the pressure is adjusted
Contracting spring 11.
Claims (6)
1. a kind of adjustable high-voltage power Pressure reducing valve for hot water, which is characterized in that including：
Pressure reducing valve casing (2), the pressure reducing valve casing (2) have inlet end and an outlet end, and pressure reducing valve casing (2) bottom is set
It is equipped with sealing cover (23), plunger shaft is provided in the middle part of the pressure reducing valve casing (2), the plunger shaft is divided at the top of plunger shaft
(221), in the middle part of plunger shaft (222) and plunger shaft bottom (223), the piston cavity bottom is provided with counterbalance spring (22), institute
It states counterbalance spring (22) bottom to connect with the sealing cover (23), counterbalance spring (22) top and locking nut (21) phase
It supports, the plunger shaft bottom (223) is provided with conical section with (222) junction in the middle part of the plunger shaft；At the top of the plunger shaft
(221) it is provided with rigid seal set (12) in, stepped hole (121) is provided at the top of the rigid seal set (12)；The outlet
End is provided with connecting pipe (224), the connecting pipe (224) be connected at the top of the plunger shaft (221) bottom end and it is described just
Space between property sealing shroud (12)；
Poppet shaft (17), is bolted with secondary seal set (16) on the poppet shaft (17), on secondary seal set (16) inner wall
It is provided with stress step (161), the rigid seal set (12), the rigid seal set are passed through at the top of the poppet shaft (17)
(12) stress step (161) Intermittent Contact on bottom and the secondary seal set (16), poppet shaft (17) lower end with
The locking nut (21) is spirally connected, and it is close from the locking nut (21) to be also socketed with cylinder successively upwards on the poppet shaft (17)
Seal (20) and sealing element interstage sleeve (19)；
Compressed spring (11), connecting spring inner sleeve (10) at the top of the compressed spring (11), compressed spring (11) lower end with
Stepped hole (121) cooperation, spring inner sleeve (10) upper end is connected with pressure adjusting screw (9), can adjust the compression
The deformation degree of spring (11), to push the rigid seal set (12) to move downward；
End cap (7), the end cap (7) are connected to the top of the pressure reducing valve casing (2), and the pressure adjusting screw (9) passes through
The end cap (7), the compressed spring (11) are arranged in the end cap (7).
2. adjustable high-voltage power Pressure reducing valve for hot water as described in claim 1, which is characterized in that removable at the top of the end cap (7)
That unloads is provided with protective case (8), and the pressure adjusting screw (9) is set in the protective case (8).
3. pressure adjustable type high pressure Pressure reducing valve for hot water as described in claim 1, which is characterized in that the input end and it is described go out
Mouth is connected with flange-interface (1) on end.
4. pressure adjustable type high pressure Pressure reducing valve for hot water as described in claim 1, which is characterized in that the rigid seal set (12)
It is provided with sealing ring (13) between the pressure reducing valve casing (2), the is equipped between the secondary seal set (16) and shell (2)
One sealing ring (131) is provided with the second sealing ring (132), institute between the poppet shaft (17) and the rigid seal set (12)
It states and is provided with third sealing ring (133) between poppet shaft (17) and the secondary seal set (16), the poppet shaft (17) and institute
It states and is provided with the 4th sealing ring (134) between sealing element interstage sleeve (19).
5. pressure adjustable type high pressure Pressure reducing valve for hot water as described in claim 1, which is characterized in that the end cap (7) passes through spiral shell
Nail (4) is connected on the pressure reducing valve casing (2).
6. pressure adjustable type high pressure Pressure reducing valve for hot water as described in claim 1, which is characterized in that be arranged on the end cap (7)
There is venthole (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384644.3A CN108506544B (en) | 2018-04-26 | 2018-04-26 | Pressure-adjustable high-pressure water pressure-reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810384644.3A CN108506544B (en) | 2018-04-26 | 2018-04-26 | Pressure-adjustable high-pressure water pressure-reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108506544A true CN108506544A (en) | 2018-09-07 |
| CN108506544B CN108506544B (en) | 2019-10-11 |
Family
ID=63399323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810384644.3A Active CN108506544B (en) | 2018-04-26 | 2018-04-26 | Pressure-adjustable high-pressure water pressure-reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108506544B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017381A (en) * | 2019-04-04 | 2019-07-16 | 北消安全设备(北京)有限公司 | A kind of pilot valve for pressure reducing valve |
| CN112943994A (en) * | 2021-03-05 | 2021-06-11 | 星河动力(北京)空间科技有限公司 | Self-feedback adjusting type pressure reducing valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498323A (en) * | 2009-05-19 | 2012-06-13 | 科瓦尔株式会社 | Pressure reducing valve |
| CN203082304U (en) * | 2013-01-18 | 2013-07-24 | 淮南市朝和机电有限公司 | Adjustable reducing valve |
| CN203214990U (en) * | 2013-04-18 | 2013-09-25 | 上海艾维科阀门有限公司 | Pressure reducing valve for nuclear power water system |
| CN204553961U (en) * | 2015-04-13 | 2015-08-12 | 烟台融窗太阳能热水器有限公司 | A kind of reduction valve |
| CN204878756U (en) * | 2015-08-20 | 2015-12-16 | 宁波市华益气动工程有限公司 | Seal structure of relief pressure valve |
| CN205136709U (en) * | 2015-11-11 | 2016-04-06 | 山东龙普太阳能有限公司 | Mechanical type multi -function control valve |
| CN205298643U (en) * | 2016-01-08 | 2016-06-08 | 志远科技有限公司 | Pressure reducing valve |
-
2018
- 2018-04-26 CN CN201810384644.3A patent/CN108506544B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498323A (en) * | 2009-05-19 | 2012-06-13 | 科瓦尔株式会社 | Pressure reducing valve |
| CN203082304U (en) * | 2013-01-18 | 2013-07-24 | 淮南市朝和机电有限公司 | Adjustable reducing valve |
| CN203214990U (en) * | 2013-04-18 | 2013-09-25 | 上海艾维科阀门有限公司 | Pressure reducing valve for nuclear power water system |
| CN204553961U (en) * | 2015-04-13 | 2015-08-12 | 烟台融窗太阳能热水器有限公司 | A kind of reduction valve |
| CN204878756U (en) * | 2015-08-20 | 2015-12-16 | 宁波市华益气动工程有限公司 | Seal structure of relief pressure valve |
| CN205136709U (en) * | 2015-11-11 | 2016-04-06 | 山东龙普太阳能有限公司 | Mechanical type multi -function control valve |
| CN205298643U (en) * | 2016-01-08 | 2016-06-08 | 志远科技有限公司 | Pressure reducing valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017381A (en) * | 2019-04-04 | 2019-07-16 | 北消安全设备(北京)有限公司 | A kind of pilot valve for pressure reducing valve |
| CN112943994A (en) * | 2021-03-05 | 2021-06-11 | 星河动力(北京)空间科技有限公司 | Self-feedback adjusting type pressure reducing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108506544B (en) | 2019-10-11 |
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