CN109506023A - A kind of quasi- regulator of portable small-flow precise - Google Patents
A kind of quasi- regulator of portable small-flow precise Download PDFInfo
- Publication number
- CN109506023A CN109506023A CN201811559162.3A CN201811559162A CN109506023A CN 109506023 A CN109506023 A CN 109506023A CN 201811559162 A CN201811559162 A CN 201811559162A CN 109506023 A CN109506023 A CN 109506023A
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- China
- Prior art keywords
- gasket
- pressure inlet
- valve
- lower case
- regulator
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- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
- Safety Valves (AREA)
Abstract
A kind of quasi- regulator of portable small-flow precise, including upper body component, accurate regulation component and lower case component；The upper body component includes screw rod, upper body and screw connection；The accurate regulation component includes the first spring, neck bush, positioning seat, lower spring, third gasket, diaphragm, stop collar, external bushing, block, upper spring, upper valve and lower valve；The lower case component includes lower case, the first pressure inlet, nut, ozzle, the first gasket, the second pressure inlet and the second gasket.The present invention is realized to the accurate pressure regulation under a variety of medium difference operating conditions, has the advantages that structure is relatively easy, output pressure is stable, adjusting is accurate.
Description
Technical field
The present invention relates to a kind of portable quasi- regulators of small-flow precise, belong to fluid machinery technical field.
Background technique
In aerospace research and production, the conveying of air, water or other fluid medium is distributed, it is often necessary to by its pressure
It controls in a certain range, to meet the needs of different operating conditions.Under the conditions of the prior art, generally realized using pressure regulator valve, it is this
Valve mechanism is complicated and Fluid pressure is difficult accurately and stably to guarantee that in a certain range, it is unfavorable to cause to production, test etc.
It influences.
Summary of the invention
The technical problem to be solved by the present invention is overcome the deficiencies in the prior art, using new structural design and novel close
Closure material, provides that a kind of structure is relatively easy, output pressure is stable, adjusts the accurate portable quasi- regulator of small-flow precise.
The object of the invention is achieved by the following technical programs: a kind of portable quasi- regulator of small-flow precise, including
Upper body component, accurate regulation component and lower case component；
The upper body component includes screw rod, upper body；
The lower case component includes lower case, the first pressure inlet, nut, ozzle, the first gasket, the second pressure inlet
With the second gasket；
The accurate regulation component include the first spring, neck bush, positioning seat, lower spring, diaphragm, stop collar, external bushing,
Block, upper spring, fixed ring, upper valve and lower valve；
Screw rod is mounted in the centre bore of upper body one end；Block is mounted in upper body, and external bushing is mounted on
In portion shell other end port, the first spring is mounted between block and external bushing, and external bushing is limited by stop collar；Diaphragm peace
Between upper body and lower case；Neck bush one end passes through the centre bore of diaphragm and external bushing, and end passes through fixed ring
Fixed, the other end face and external bushing clamp diaphragm jointly；Upper valve one end is mounted in neck bush by upper spring；
Lower case is provided with through-hole along central axis, is provided with annular groove at one end end face center connecting with upper body,
Side is provided with the second pressure inlet mounting hole, is connected to annular groove；Positioning seat is mounted in the annular groove bottom surface of lower case
In the through-hole of the heart；The thimble of lower valve one end passes through positioning seat center and is inserted into the blind hole of the upper valve other end, and lower valve is another
Lower spring is installed, the first pressure inlet is mounted on lower case center bore ends, and ozzle passes through nut between end and the first pressure inlet
It is fixed at the first pressure inlet port；
Second pressure inlet is mounted on the second pressure inlet mounting hole.
The upper body component further includes screw connection, and part is connected by screw between upper body and lower case
It is fixed.
The accurate regulation component further includes third gasket, the annular groove bottom center of positioning seat and lower case it is logical
Third gasket is installed between hole.
The lower case component further includes the first gasket, the second gasket；Second pressure inlet and the second pressure inlet mounting hole
Between the second gasket is installed, the first gasket is installed between the first pressure inlet and lower case centre bore.
The external bushing is rotary structure, and one end is frustum structure, and the other end is circular disk structure, external bushing center
It is provided with through-hole.
The neck bush is cylindrical structure, and one end setting annular disk is set on the cylinder inner wall of neck bush for clamping diaphragm
Step structure is set for installing upper spring.
The upper valve includes upper valve body, upper valve head, and upper valve body is rotary structure, and both ends are provided with blind
Hole, upper valve head are installed in blind hole at one end；The material of upper valve head is polyester nylon material.
The lower valve includes lower valve body, lower valve head, thimble, and lower valve body is rotary structure, and both ends are opened
There is blind hole；In the blind hole of lower valve head installation at one end；Lower valve head uses polyester nylon material.
Diaphragm uses nitrile rubber material；First gasket, the second gasket and third gasket are all made of copper material.
In static state: lower spring-compressed enters so that sealing between lower valve and positioning seat from the first pressure inlet entrance
Fluid media (medium) can not advance, and device is in sealing state；
In pressure regulation: adjusting screw rod pushes block, and block compresses the first spring, pushes external bushing, neck bush, and then push away
Dynamic upper spring, upper valve move downward, and upper valve pushes the sealing surface of lower valve and positioning seat to be initially separated by thimble, medium
Entered in the cavity of lower case by the gap between lower valve and positioning seat centre bore, and is discharged by the second pressure inlet；If
Do not continue to rotate clockwise screw rod, the gap of lower valve and positioning seat remains unchanged, the pressure medium being discharged from the second pressure inlet
It is maintained at a stationary value；If continuing to rotate clockwise screw rod, the gap increase of lower valve and positioning seat is arranged from the second pressure inlet
Pressure medium increases out, and screw rod stops operating, and the second pressure inlet discharge pressure medium reaches new stationary value, until pressure regulation to institute
Until needing pressure.
The present invention has the following beneficial effects: compared with the prior art
(1) the accurate pressure regulation of the quasi- regulator of portable small-flow precise of the invention: upper body component and accurate pressure regulation group
Part realizes the accurate pressure regulation of described device jointly, and for degree of regulation up to 1%, range of regulation covers 0.1 to more than ten atmospheric pressure.
(2) the quasi- regulator stable voltage of portable small-flow precise of the invention: accurate regulation component and lower case group
Part realizes described device stable voltage jointly, meets the requirement of working medium pressure long-time stable.
(3) the quasi- regulator of portable small-flow precise of the invention is convenient for carrying: described device overall dimensions it is long by 150 ×
Wide by 150 × high 350 millimeters or so, about 2 kilograms of weight, outer dimension and weight are optimized, transport easy to carry.
(4) the quasi- regulator of portable small-flow precise of the invention is convenient for safeguarding: device assembly corrosion resistance is mentioned
It rises, simple composed structure facilitates equipment maintenance, ensure that the use service life of device.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is upper valve composition schematic diagram of the invention；
Fig. 3 is lower valve composition schematic diagram of the invention；
Fig. 4 is partial enlarged view of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to implementation of the invention
Mode is described in further detail.
As Figure 1 and Figure 4, a kind of quasi- regulator of portable small-flow precise, including upper body component 1, accurate pressure regulation
Component 2 and lower case component 3；
Upper body component 1 is made of screw rod 1-1, upper body 1-2 and screw connection 1-3, main to pass through manipulation spiral shell
Bar completes pressure regulation effect；
Accurate regulation component 2 by the first spring 2-1, neck bush 2-2, positioning seat 2-3, lower spring 2-4, third gasket 2-5,
Diaphragm 2-6, stop collar 2-7, external bushing 2-8, block 2-9, upper spring 2-10, fixed ring 2-11, upper valve 2-12 and lower valve
2-13 composition, is mainly linked by each component and realizes the accurate adjusting of pressure；
Lower case component 3 by lower case 3-1, the first pressure inlet 3-2, nut 3-3, ozzle 3-4, the first gasket 3-5,
Second pressure inlet 3-6 and the second gasket 3-7 composition mainly provides the channel of working media disengaging regulator.
Screw rod 1-1 is mounted in the centre bore of the one end upper body 1-2；Block 2-9 is mounted in upper body 1-2, outside
Bushing 2-8 is mounted in upper body 1-2 other end port, and the first spring 2-1 is mounted between block 2-9 and external bushing 2-8,
External bushing 2-8 is limited by stop collar 2-7, and when pressure regulation, stop collar 2-7 has dispersed external bushing to the pressure of diaphragm 2-6；Diaphragm 2-
6 are mounted between upper body 1-2 and lower case 3-1；The one end neck bush 2-2 passes through the center of diaphragm 2-6 and external bushing 2-8
Hole, end are fixed by fixed ring 2-11, and the other end face and external bushing 2-8 clamp diaphragm 2-6 jointly；The one end upper valve 2-12
It is mounted in neck bush 2-2 by upper spring 2-10；
Lower case 3-1 is provided with through-hole along central axis, is provided with annular at one end end face center connecting with upper body 1-2
Groove, side are provided with the second pressure inlet mounting hole, are connected to annular groove；Positioning seat 2-3 is mounted on the annular of lower case 3-1
In the through-hole at groove floor center, third gasket 2-5 is installed between positioning seat 2-3 and through-hole；The thimble of lower one end valve 2-13
In the blind hole that the upper valve 2-12 other end is inserted at the center positioning seat 2-3, the lower valve 2-13 other end and the first pressure inlet 3-2
Between lower spring 2-4 is installed, the first pressure inlet 3-2 is mounted on the center lower case 3-1 bore ends, and the first pressure inlet 3-2 is under
First gasket 3-5 is installed, ozzle 3-4 is fixed on the first port pressure inlet 3-2 by nut 3-3 between portion's shell 3-1 centre bore
Place；
Second pressure inlet 3-6 is mounted on the second pressure inlet mounting hole, the second pressure inlet 3-6 and the second pressure inlet mounting hole
Between the second gasket 3-7 is installed；Part 1-3 is connected by screw between upper body 1-2 and lower case 1-3 to fix.
It is connected by screw to part 1-3 between upper body component 1 and lower case component 3 and compresses diaphragm 2-6 realization sealing
Connection；The accurate regulation component 2 is mounted in the chamber formed between upper body component 1 and lower case component 3.It is described
Device overall dimensions are 150 × wide by 150 × high 350 millimeters or so long, and about 2 kilograms of weight, outer dimension and weight obtain excellent
Change, transport easy to carry.
External bushing 2-8 is rotary structure, and one end is frustum structure, and the other end is circular disk structure, in external bushing 2-8
The heart is provided with through-hole.
Neck bush 2-2 is cylindrical structure, and annular disk is arranged in one end, for clamping diaphragm 2-6, in the cylinder of neck bush 2-2
Step structure is set on wall for installing upper spring 2-10.
As shown in Fig. 2, upper valve 2-12 includes upper valve body 2-12-1, upper valve head 2-12-2, upper valve body 2-
12-1 is rotary structure, and both ends are provided with blind hole, and upper valve head 2-12-2 is installed in blind hole at one end；Upper valve head 2-12-2
Material be polyester nylon material.
As shown in figure 3, lower valve 2-13 includes lower valve body 2-13-1, lower valve head 2-13-2, thimble 2-13-3, under
Valve body 2-13-1 is rotary structure, and both ends are provided with blind hole；In the blind hole of lower valve head 2-13-2 installation at one end；Lower work
Door head 2-13-2 uses polyester nylon material.
Each building block of device mostly uses stainless steel material, and diaphragm 2-6 is using nitrile rubber material, the first gasket 3-5, the
Two gasket 3-7 and third gasket 2-5 are all made of copper material, and device overall structure is simple, and maintenance easy to disassemble, sealing element is easy to
Replacement, can satisfy the requirement being used for a long time under a variety of environment.
The portable quasi- regulator working principle of small-flow precise:
Static: regulator is separated into two cavitys up and down by rubber diaphragm 2-6, and when static off working state, first is connect
Ozzle 3-2 installation is in place, and the lower spring 2-4 being stuck in both the first pressure inlet 3-2 and lower valve 2-13 interior step is slightly pressed
Contracting so that sealed between lower valve 2-13 and positioning seat 2-3, ensured the first pressure inlet 3-2 entrance fluid media (medium) can not before
Into so that whole system is not because gas leakage generates noise.
Pressure regulation: screw rod 1-1 is rotated clockwise, and is pushed block 2-9, block 2-9 to compress the first spring 2-1, is pushed external bushing
2-8, neck bush 2-2, and then upper spring 2-10, upper valve 2-12 is pushed to move downward, under upper valve 2-12 is pushed by thimble
Valve 2-13 and the sealing surface of positioning seat 2-3 are initially separated, medium by the gap between lower valve 2-13 and lower case 3-1 into
In the cavity for entering lower case 3-1, and be discharged by the second pressure inlet 3-6, into positioning seat 2-3 medium but because of upper valve 2-
12 have closed and can not continue uplink.At this point, if not continuing to rotate clockwise screw rod 1-1, lower valve 2-13 and positioning seat
The gap of 2-3 remains unchanged, and the pressure medium being discharged from the second pressure inlet 3-6 is positively retained at a stationary value.
If continuing to rotate clockwise screw rod 1-1, the gap of lower valve 2-13 and positioning seat 2-3 will constantly increase, then from
Second pressure inlet 3-6 discharge pressure medium will be further increased, and screw rod 1-1 stops operating, and medium pressure is discharged in the second pressure inlet 3-6
Power reaches new stationary value again, until pressure regulation to required pressure.Upper body component 1 and accurate regulation component 2 are common real
The accurate pressure regulation of described device is showed, for degree of regulation up to 1%, range of regulation covers 0.1 to more than ten atmospheric pressure.
After use, valve 2-12 seal failure can be made by rotating counterclockwise screw rod 1-1, by extra medium from upper
The aperture of portion shell 1-2 is discharged.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (10)
1. a kind of quasi- regulator of portable small-flow precise, it is characterised in that: including upper body component (1), accurate pressure regulation group
Part (2) and lower case component (3)；
The upper body component (1) includes screw rod (1-1), upper body (1-2)；
The lower case component (3) include lower case (3-1), the first pressure inlet (3-2), nut (3-3), ozzle (3-4),
First gasket (3-5), the second pressure inlet (3-6) and the second gasket (3-7)；
The accurate regulation component (2) include the first spring (2-1), neck bush (2-2), positioning seat (2-3), lower spring (2-4),
Diaphragm (2-6), stop collar (2-7), external bushing (2-8), block (2-9), upper spring (2-10), fixed ring (2-11), upper valve
(2-12) and lower valve (2-13)；
Screw rod (1-1) is mounted in the centre bore of the one end upper body (1-2)；Block (2-9) is mounted on upper body (1-2)
Interior, external bushing (2-8) is mounted in upper body (1-2) other end port, the first spring (2-1) be mounted on block (2-9) and
Between external bushing (2-8), external bushing (2-8) is limited by stop collar (2-7)；Diaphragm (2-6) be mounted on upper body (1-2) and
Between lower case (3-1)；Neck bush one end (2-2) passes through the centre bore of diaphragm (2-6) and external bushing (2-8), and end passes through
Fixed ring (2-11) is fixed, and the other end face and external bushing (2-8) clamp diaphragm (2-6) jointly；Upper valve one end (2-12) is logical
Upper spring (2-10) is crossed to be mounted in neck bush (2-2)；
Lower case (3-1) is provided with through-hole along central axis, is provided with annular at one end end face center connecting with upper body (1-2)
Groove, side are provided with the second pressure inlet mounting hole, are connected to annular groove；Positioning seat (2-3) is mounted on lower case (3-1)
In the through-hole of annular groove bottom center；The thimble of lower valve (2-13) one end passes through the positioning seat center (2-3) and is inserted into upper valve
Lower spring (2-4) is installed in the blind hole of (2-12) other end, between lower valve (2-13) other end and the first pressure inlet (3-2),
First pressure inlet (3-2) is mounted on the center lower case (3-1) bore ends, and ozzle (3-4) is fixed on first by nut (3-3)
At the port pressure inlet (3-2)；Second pressure inlet (3-6) is mounted on the second pressure inlet mounting hole.
2. a kind of portable quasi- regulator of small-flow precise according to claim 1, it is characterised in that: the upper body
Component (1) further includes screw connection (1-3), is connected by screw to part between upper body (1-2) and lower case (1-3)
(1-3) is fixed.
3. a kind of portable quasi- regulator of small-flow precise according to claim 1 or 2, it is characterised in that: described accurate
Regulation component (2) further includes third gasket (2-5), positioning seat (2-3) and the annular groove bottom center of lower case (3-1)
Third gasket (2-5) is installed between through-hole.
4. a kind of portable quasi- regulator of small-flow precise according to claim 3, it is characterised in that: the lower case
Component (3) further includes the first gasket (3-5), the second gasket (3-7)；Second pressure inlet (3-6) and the second pressure inlet mounting hole it
Between install the second gasket (3-7), the first gasket (3- is installed between the first pressure inlet (3-2) and lower case (3-1) centre bore
5)。
5. a kind of portable quasi- regulator of small-flow precise according to claim 4, it is characterised in that: the external bushing
(2-8) is rotary structure, and one end is frustum structure, and the other end is circular disk structure, and the center external bushing (2-8) is provided with logical
Hole.
6. a kind of portable quasi- regulator of small-flow precise according to claim 4 or 5, it is characterised in that: the liner
Covering (2-2) is cylindrical structure, and one end setting annular disk is set on the cylinder inner wall of neck bush (2-2) for clamping diaphragm (2-6)
Step structure is set for installing upper spring (2-10).
7. a kind of portable quasi- regulator of small-flow precise according to claim 6, it is characterised in that: the upper valve
(2-12) includes upper valve body (2-12-1), upper valve head (2-12-2), and upper valve body (2-12-1) is rotary structure,
Both ends are provided with blind hole, and upper valve head (2-12-2) is installed in blind hole at one end；The material of upper valve head (2-12-2) is polyester
Nylon material.
8. a kind of portable quasi- regulator of small-flow precise according to claim 7, it is characterised in that: the lower valve
(2-13) includes lower valve body (2-13-1), lower valve head (2-13-2), thimble (2-13-3), lower valve body (2-13-1)
For rotary structure, both ends are provided with blind hole；In the blind hole of lower valve head (2-13-2) installation at one end；Lower valve head (2-13-2)
Using polyester nylon material.
9. a kind of portable quasi- regulator of small-flow precise according to claim 4, it is characterised in that: diaphragm (2-6) is adopted
With nitrile rubber material；First gasket (3-5), the second gasket (3-7) and third gasket (2-5) are all made of copper material.
10. a kind of portable quasi- regulator of small-flow precise according to claim 9, it is characterised in that:
In static state: lower spring (2-4) compression, so that being sealed between lower valve (2-13) and positioning seat (2-3), from the first adapter tube
The fluid media (medium) that mouth (3-2) entrance enters can not advance, and device is in sealing state；
In pressure regulation: adjusting screw rod (1-1) pushes block (2-9), and block (2-9) compresses the first spring (2-1), pushes outer lining
(2-8), neck bush (2-2) are covered, and then upper spring (2-10), upper valve (2-12) is pushed to move downward, upper valve (2-12) is logical
Crossing thimble pushes lower valve (2-13) and the sealing surface of positioning seat (2-3) to be initially separated, and medium is by lower valve (2-13) and positioning
Gap between seat (2-3) centre bore enters in the cavity of lower case (3-1), and is discharged by the second pressure inlet (3-6)；If
Do not continue to rotate clockwise screw rod (1-1), lower valve (2-13) and the gap of positioning seat (2-3) remain unchanged, from the second adapter tube
The pressure medium of mouth (3-6) discharge is maintained at a stationary value；If continuing to rotate clockwise screw rod (1-1), lower valve (2-13)
Increasing with the gap of positioning seat (2-3), increases from the second pressure inlet (3-6) discharge pressure medium, screw rod (1-1) stops operating,
Second pressure inlet (3-6) discharge pressure medium reaches new stationary value, until pressure regulation to required pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811559162.3A CN109506023A (en) | 2018-12-19 | 2018-12-19 | A kind of quasi- regulator of portable small-flow precise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811559162.3A CN109506023A (en) | 2018-12-19 | 2018-12-19 | A kind of quasi- regulator of portable small-flow precise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109506023A true CN109506023A (en) | 2019-03-22 |
Family
ID=65753878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811559162.3A Pending CN109506023A (en) | 2018-12-19 | 2018-12-19 | A kind of quasi- regulator of portable small-flow precise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109506023A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185659A (en) * | 2019-05-31 | 2019-08-30 | 南京晨光集团有限责任公司 | A kind of Antipollution oil tank pressure regulation device |
| CN111188800A (en) * | 2019-11-30 | 2020-05-22 | 惠阳航空螺旋桨有限责任公司 | Differential pressure precision adjusting device of propeller speed regulator |
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| CN2707153Y (en) * | 2002-05-30 | 2005-07-06 | 赵宇龙 | Spring pressure regulating type pressure reducing valve and instant drinking water machine |
| CN201190826Y (en) * | 2008-04-18 | 2009-02-04 | 洪建文 | Carbon dioxide needle type pressure reducing valve |
| US20100147400A1 (en) * | 2008-12-17 | 2010-06-17 | James Chester Hawkins | Internal relief valve apparatus for use with loading regulators |
| CN202228214U (en) * | 2011-07-29 | 2012-05-23 | 石旻磊 | Pressure regulating and pressure reducing device used for gas vehicle electric control jetting system |
| CN209354715U (en) * | 2018-12-19 | 2019-09-06 | 中国航天空气动力技术研究院 | A kind of quasi- regulator of portable small-flow precise |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2707153Y (en) * | 2002-05-30 | 2005-07-06 | 赵宇龙 | Spring pressure regulating type pressure reducing valve and instant drinking water machine |
| CN201190826Y (en) * | 2008-04-18 | 2009-02-04 | 洪建文 | Carbon dioxide needle type pressure reducing valve |
| US20100147400A1 (en) * | 2008-12-17 | 2010-06-17 | James Chester Hawkins | Internal relief valve apparatus for use with loading regulators |
| CN102257449A (en) * | 2008-12-17 | 2011-11-23 | 艾默生过程管理调节技术公司 | Internal relief valve apparatus for use with loading regulators |
| CN202228214U (en) * | 2011-07-29 | 2012-05-23 | 石旻磊 | Pressure regulating and pressure reducing device used for gas vehicle electric control jetting system |
| CN209354715U (en) * | 2018-12-19 | 2019-09-06 | 中国航天空气动力技术研究院 | A kind of quasi- regulator of portable small-flow precise |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185659A (en) * | 2019-05-31 | 2019-08-30 | 南京晨光集团有限责任公司 | A kind of Antipollution oil tank pressure regulation device |
| CN111188800A (en) * | 2019-11-30 | 2020-05-22 | 惠阳航空螺旋桨有限责任公司 | Differential pressure precision adjusting device of propeller speed regulator |
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