CN110242774A - A kind of bias minute-pressure damage check-valves - Google Patents
A kind of bias minute-pressure damage check-valves Download PDFInfo
- Publication number
- CN110242774A CN110242774A CN201910653485.7A CN201910653485A CN110242774A CN 110242774 A CN110242774 A CN 110242774A CN 201910653485 A CN201910653485 A CN 201910653485A CN 110242774 A CN110242774 A CN 110242774A
- Authority
- CN
- China
- Prior art keywords
- valve plate
- eccentric
- valve
- inner core
- valves
- 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
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 230000003313 weakening effect Effects 0.000 claims description 28
- 230000007935 neutral effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 239000010959 steel Substances 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
- 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
-
- 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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
-
- 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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
-
- 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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
Abstract
The invention discloses a kind of eccentric minute-pressures to damage check-valves, its main feature is that, it is made of outer valve sleeve, inner core pedestal and valve plate, inner core pedestal is equipped with inside outer valve sleeve, inner core pedestal is equipped with pin shaft, valve plate is connected on inner core pedestal by pin shaft by hinging manner, and valve plate is rotated around pin shaft, and the ring-shaped valve seats of sealing surface of valve plate and inner core pedestal is pressed and sealed；Cross section of fluid channel product of the present invention is bigger, and resistance is smaller, simultaneously because structure of the outer valve sleeve integral assembling in the outside of valve, will not generate risk of leakage, reliability is higher, and there are also multistage vibration proof mechanisms by the present invention, can thoroughly solve valve plate vibration.
Description
Technical field:
The present invention relates to check-valves technical field, check-valves is damaged in specifically a kind of minute-pressure.
Technical background:
Fluid check valve is using extensively at present, but that there are effective drift diameters is small, causes fluid resistance big, consume energy high problem；In addition,
The problem of existing valve body has external installation part, valve body is caused easily to leak；Check-valves also, valve plate do not have eliminating mechanism, make valve
Service life substantially reduces.
Summary of the invention:
The purpose of the present invention is overcome the deficiencies in the prior art, and provide a kind of minute-pressure damage check-valves.
Present invention provide the technical scheme that it is a kind of bias minute-pressure damage check-valves, be characterized in that, by outer valve sleeve,
Inner core pedestal and valve plate composition, the outer valve sleeve inside are equipped with inner core pedestal；The valve plate front outer band forms valve plate
Sealing surface, valve plate rear portion middle position are equipped with limited block, are equipped with hinge handle at valve plate edge；The inner core pedestal top is inclined
Heart position is equipped with eccentric valve plate chamber, and inner core pedestal lower eccentric position aperture forms eccentric runner, eccentric valve plate chamber and eccentric flow
Road concentric, eccentric valve plate chamber diameter are greater than eccentric flow diameter, and the diameter portion of increase forms ring-shaped valve seats, on inner core pedestal
The heavy wall position of portion's bias valve plate chamber is provided with hinge neutral gear, is equipped with pin shaft in hinge neutral position, the hinge handle of valve plate passes through pin
Axis and inner core pedestal carry out hinge connection, and valve plate is rotated around pin shaft, and sealing surface of valve plate and ring-shaped valve seats pressing seal.
Further, the pin shaft interposition installs playback torsional spring, and playback one end of torsional spring acts on outer valve sleeve inner wall, another
End acts on valve plate.
Further, described on pin shaft or at least one weakening spring is arranged in valve plate limited block position.
Further, weakening pressure spring is equipped with inside the limited block of the valve plate, weakening pressure spring one end acts on valve plate, separately
One end acts on weakening pin, and the weakening pin other end is drawn by limited block aperture, and weakening pin is axially movable compression weakening pressure spring.
Further, the valve plate is flow profile.
Further, the valve plate front end, which is equipped with, eliminates noise or reduces fluid resistance or eliminate the rectification of vibration
Plate is equipped with cowling panel disc spring between cowling panel and valve plate.
Further, the sealing surface of valve plate position or ring-shaped valve seats position are equipped with soft seal pad.
Further, the outer valve sleeve one or both ends are made into flange or necking or screw socket structure.
Further, the inner core pedestal with valve plate is integral inclined is mounted on inside outer valve sleeve.
The beneficial effects of the present invention are: 1, using bias design keep circulation passage bigger, fluid resistance very little；2, outer valve sleeve
Integral assembling inner core pedestal and valve plate have prevented external leakage risk；3, increase eliminating mechanism on valve plate, there is multistage vibrationproof function
Can, valve plate vibration in fluid flowing can be prevented, so that the service life reliability of valve be made to greatly improve；4, outer valve sleeve one end or
Person both ends are made into throat structure, and perhaps flange arrangement or helicitic texture etc. are installed simultaneously with adapting to a variety of different occasions
It is more convenient；5, the flip angle when switch of valve plate can be made to become smaller in outer valve sleeve the inner core pedestal angle mount with valve plate,
It is rapider to switch.
Detailed description of the invention:
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is inner core pedestal schematic diagram of the invention；
Fig. 3 is valve board structure schematic diagram of the invention；
Fig. 4 is pin shaft of the invention by valve plate and inner core base hinge attachment structure schematic diagram；
Fig. 5 is the structural schematic diagram of the invention with gasket；
Fig. 6 is present invention band cowling panel structural schematic diagram；
Fig. 7 is band weakening spring structure schematic diagram of the invention；
Fig. 8 is the structural schematic diagram of angle mount inner core pedestal of the invention；
Fig. 9 is outer valve sleeve both ends of the present invention necking, structural schematic diagram of the weakening spring in limited block position；
Figure 10 is the structural schematic diagrams that outer valve sleeve both ends of the present invention are flange.
In figure, 1 outer valve sleeve, 2 inner core pedestals, 3 valve plates, 4 eccentric valve plate chambers, 5 eccentric runners, 6 ring-shaped valve seats, 7 hinges sky
Shelves, 8 hinge handles, 9 limited blocks, 10 sealing surface of valve plate, 11 playback torsional springs, 12 weakening springs, 13 weakening pins, 14 weakening pressure springs,
15 cowling panels, 16 pin shafts, 17 cowling panel disc springs, 18 soft seal pads.
Specific embodiment:
For a better understanding and implementation, providing specific embodiment with reference to the accompanying drawing, the present invention will be described in detail；Illustrated embodiment
For explaining only the invention, it is not intended to limit the scope of the present invention.
Embodiment 1, as shown in Fig. 1,2,3,4,5, a kind of bias minute-pressure damage check-valves, by outer valve sleeve 1,2 and of inner core pedestal
Valve plate 3 forms, and outer valve sleeve 1 can be steel part, be also possible to the materials such as brass part or copper tube, band on 1 outer surface of outer valve sleeve
There are fluid flow direction mark and other marks；By 2 integral installation of inner core pedestal with valve plate 3 inside outer valve sleeve 1；Valve plate 3 is stream
Shape；3 front outer band of valve plate forms sealing surface of valve plate 10, and there is limited block 9 in 3 rear portion middle position of valve plate, on valve plate side
Edge has hinge handle 8；There are eccentric valve plate chamber 4,2 lower eccentric position aperture shape of inner core pedestal in 2 top eccentric position of inner core pedestal
At eccentric runner 5, eccentric valve plate chamber 4 and 5 concentric of eccentric runner, eccentric 4 diameter of valve plate chamber are greater than 5 diameter of eccentric runner, increase
Big diameter portion forms ring-shaped valve seats 6；It is provided with hinge neutral gear 7 in the heavy wall position of 2 top bias valve plate chamber 4 of inner core pedestal,
Pin shaft 16 is installed in 7 position of hinge neutral gear, the hinge handle 8 of valve plate 3 carries out hinge connection, valve by pin shaft 16 and inner core pedestal 2
Plate 3 is rotated around pin shaft 16, and sealing surface of valve plate 10 and the pressing of ring-shaped valve seats 6 seal.
Playback torsional spring 11 is installed in 16 middle position of pin shaft, playback 11 one end of torsional spring acts on 1 inner wall of outer valve sleeve, the other end
It acts on valve plate 3.
If right angle setting or certain special occasions, playback torsional spring 11 can save, can be by gravity or fluid itself
Deboost be automatically closed.
In order to further prevent valve plate vibration in fluid flowing, weakening pressure spring is installed inside the limited block 9 of valve plate 3
14,14 one end of weakening pressure spring acts on valve plate 3, and the other end acts on 13 one end of weakening pin, and 13 other end of weakening pin passes through limited block 9
Aperture is drawn, 13 radial movement compresses weakening pressure spring 14 of weakening pin；Valve plate vibration in fluid flowing can be prevented, to make valve
Service life reliability greatly improves.
In certain occasions, it is desirable that reversed sealing is very good, so in 10 position of sealing surface of valve plate or ring-shaped valve seats 6
It sets, increases soft seal pad 18.
Check-valves is damaged in a kind of eccentric minute-pressure of the invention, and when normal work, when fluid flows through eccentric runner 5, fluid is pushed away
Dynamic valve plate 3 is overturn around pin shaft 16, and due to being eccentric design, the aperture of valve plate 3 can be very big, to keep circulation latus rectum very big, is made
Fluid resistance very little；When fluid stops flowing, valve plate 3 is under the action of restoring spring, there are also the reversed impulse force pressure of fluid,
It reversely rotates, makes sealing surface of valve plate 10 and 6 gluing, sealing of ring-shaped valve seats, prevent reverse fluid flow.
Embodiment 2, as shown in fig. 6, with embodiment 1, except that in order to keep 3 fluid resistance of valve plate lower, Huo Zhewei
It further prevents valve plate 3 to vibrate, can increase in valve plate 3 front end and eliminate noise or reduce fluid resistance or eliminate vibration
Cowling panel 15 installs cowling panel disc spring 17 between cowling panel 15 and valve plate 3；When fluid flows, first act on cowling panel 15,
15 front-back stress of cowling panel is cancelled out each other, to prevent from causing to vibrate since fluid is unstable.
Embodiment 3, as shown in Fig. 7,9, with embodiment 1 or 2, except that in order to further prevent valve plate 3 to vibrate,
At least one weakening spring 12 is set on pin shaft 16 or in 9 position of valve plate limited block, when valve plate 3 is beaten under fluid matasomatism
When reaching certain aperture, weakening spring 12 acts on valve plate 3, to eliminate valve plate fluid oscillation.
Embodiment 4, can will be with valve plate 3 except that in certain occasions as shown in figure 8, with embodiment 1,2 or 3
2 angle mount of inner core pedestal in outer valve sleeve 1, this can make the flip angle when switch of valve plate 2 become smaller, thus switch it is more fast
Speed.
Embodiment 5, as shown in Figures 9 and 10, with embodiment 1,2,3 or 4, except that 1 one or both ends of outer valve sleeve
It is made into flange or necking or screw socket structure, to adapt to a variety of different occasions, is easily installed, inner core pedestal 2 and valve plate 3 etc.
Component can be crimped in outer valve sleeve 2, can also be welded on 1 inner wall of outer valve sleeve, and weakening spring 12 is mounted in valve plate limited block 9
On position.
Claims (9)
1. check-valves is damaged in a kind of bias minute-pressure, which is characterized in that be made of outer valve sleeve (1), inner core pedestal (2) and valve plate (3), institute
Inner core pedestal (2) are equipped with inside the outer valve sleeve (1) stated；Valve plate (3) the front outer band forms sealing surface of valve plate (10), valve
Plate (3) rear portion middle position is equipped with limited block (9), is equipped with hinge handle (8) at valve plate edge；On the inner core pedestal (2)
Portion's eccentric position is equipped with eccentric valve plate chamber (4), and inner core pedestal (2) lower eccentric position aperture forms eccentric runner (5), eccentric valve
Plate chamber (4) and eccentric runner (5) concentric, eccentric valve plate chamber (4) diameter are greater than eccentric runner (5) diameter, the diameter portion of increase
Divide and formed ring-shaped valve seats (6), the heavy wall position of inner core pedestal (2) top bias valve plate chamber (4) is provided with hinge neutral gear (7), is cutting with scissors
Chain neutral gear (7) position is equipped with pin shaft (16), and the hinge handle (8) of valve plate (3) carries out hinge by pin shaft (16) and inner core pedestal (2)
Connection, valve plate (3) are rotated around pin shaft (16), and sealing surface of valve plate (10) and ring-shaped valve seats (6) pressing seal.
2. check-valves is damaged in a kind of eccentric minute-pressure according to claim 1, which is characterized in that pin shaft (16) middle position
If playbacking torsional spring (11), playback torsional spring (11) one end acts on outer valve sleeve (1) inner wall, and the other end acts on valve plate (3).
3. check-valves is damaged in a kind of eccentric minute-pressure according to claim 1 or 2, which is characterized in that described on pin shaft (16)
Or at least one weakening spring (12) is arranged in valve plate limited block (9) position.
4. check-valves is damaged in a kind of eccentric minute-pressure according to claim 1, which is characterized in that the limit of the valve plate (3)
Weakening pressure spring (14) are equipped with inside block (9), weakening pressure spring (14) one end acts on valve plate (3), and the other end acts on weakening pin (13),
Weakening pin (13) other end is drawn by limited block (9) aperture, and weakening pin (13) is axially movable compression weakening pressure spring (14).
5. check-valves is damaged in a kind of eccentric minute-pressure according to claim 1, which is characterized in that the valve plate (3) is fluid
Shape.
6. check-valves is damaged in a kind of eccentric minute-pressure according to claim 1, which is characterized in that described valve plate (3) front end is equipped with
It eliminates noise or reduces fluid resistance or eliminate the cowling panel (15) of vibration, be equipped between cowling panel (15) and valve plate (3) whole
Flowing plate disc spring (17).
7. check-valves is damaged in a kind of eccentric minute-pressure according to claim 1, which is characterized in that the sealing surface of valve plate (10)
Position or ring-shaped valve seats (6) position are equipped with soft seal pad (18).
8. check-valves is damaged in a kind of eccentric minute-pressure according to claim 1, which is characterized in that described outer valve sleeve (1) one end
Either both ends are made into flange or necking or screw socket structure.
9. check-valves is damaged in a kind of eccentric minute-pressure according to claim 1, which is characterized in that described with the interior of valve plate (3)
Core pedestal (2) is integral inclined to be mounted on outer valve sleeve (1) inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653485.7A CN110242774A (en) | 2019-07-19 | 2019-07-19 | A kind of bias minute-pressure damage check-valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653485.7A CN110242774A (en) | 2019-07-19 | 2019-07-19 | A kind of bias minute-pressure damage check-valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110242774A true CN110242774A (en) | 2019-09-17 |
Family
ID=67892852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910653485.7A Pending CN110242774A (en) | 2019-07-19 | 2019-07-19 | A kind of bias minute-pressure damage check-valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110242774A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336283A (en) * | 2020-05-19 | 2020-06-26 | 烟台佳友电子机械科技有限公司 | Micro-pressure loss check valve |
| CN111336282A (en) * | 2020-05-19 | 2020-06-26 | 烟台佳友电子机械科技有限公司 | Micro-resistance check valve |
| CN111608611A (en) * | 2020-06-09 | 2020-09-01 | 中国石油天然气集团有限公司 | Large-drift-diameter bridge plug capable of realizing single upper seal fracturing and method |
| CN112081653A (en) * | 2020-08-28 | 2020-12-15 | 王玉华 | Vortex pressure boost heat abstractor |
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| CN202215799U (en) * | 2011-08-31 | 2012-05-09 | 克里特集团有限公司 | Swing check valve |
| CN203240020U (en) * | 2013-05-14 | 2013-10-16 | 中业阀门集团有限公司 | Butt clamping silent check valve |
| CN203258118U (en) * | 2013-05-17 | 2013-10-30 | 厦门市台亚塑胶有限公司 | Check valve for end of intake pipe |
| CN105299273A (en) * | 2015-10-27 | 2016-02-03 | 合肥通用机械研究院 | Pulse back-flushing valve |
| CN205036913U (en) * | 2015-09-24 | 2016-02-17 | 北京精铭泰工程技术开发有限公司 | Low globular non return device of resistance |
| CN205260877U (en) * | 2015-12-17 | 2016-05-25 | 凯喜姆阀门有限公司 | Stop valve with anti -shake ejector half valve clack |
| CN208138499U (en) * | 2018-04-23 | 2018-11-23 | 南安市起胤机械科技有限公司 | A kind of irrigation control valve of adjustable cracking pressure |
| CN210196563U (en) * | 2019-07-19 | 2020-03-27 | 贾培育 | Eccentric micro-pressure loss check valve |
-
2019
- 2019-07-19 CN CN201910653485.7A patent/CN110242774A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005003123U1 (en) * | 2005-02-26 | 2005-05-19 | Reiche, Dirk | Flap valve has housing with leg spring, with one spring leg held non-turnable on hinge pin to ensure closing function of valve |
| CN201661734U (en) * | 2010-04-26 | 2010-12-01 | 温州市石化机械阀门厂 | Check valve |
| CN102345742A (en) * | 2010-07-29 | 2012-02-08 | 浙江正华阀门厂 | Isolating valve sealed by structural ceramic valve clack and metal elastic valve seat |
| CN201934693U (en) * | 2010-12-09 | 2011-08-17 | 杨猛 | Water pump controlling valve with guide plate |
| CN202215799U (en) * | 2011-08-31 | 2012-05-09 | 克里特集团有限公司 | Swing check valve |
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| CN203258118U (en) * | 2013-05-17 | 2013-10-30 | 厦门市台亚塑胶有限公司 | Check valve for end of intake pipe |
| CN205036913U (en) * | 2015-09-24 | 2016-02-17 | 北京精铭泰工程技术开发有限公司 | Low globular non return device of resistance |
| CN105299273A (en) * | 2015-10-27 | 2016-02-03 | 合肥通用机械研究院 | Pulse back-flushing valve |
| CN205260877U (en) * | 2015-12-17 | 2016-05-25 | 凯喜姆阀门有限公司 | Stop valve with anti -shake ejector half valve clack |
| CN208138499U (en) * | 2018-04-23 | 2018-11-23 | 南安市起胤机械科技有限公司 | A kind of irrigation control valve of adjustable cracking pressure |
| CN210196563U (en) * | 2019-07-19 | 2020-03-27 | 贾培育 | Eccentric micro-pressure loss check valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336283A (en) * | 2020-05-19 | 2020-06-26 | 烟台佳友电子机械科技有限公司 | Micro-pressure loss check valve |
| CN111336282A (en) * | 2020-05-19 | 2020-06-26 | 烟台佳友电子机械科技有限公司 | Micro-resistance check valve |
| CN111608611A (en) * | 2020-06-09 | 2020-09-01 | 中国石油天然气集团有限公司 | Large-drift-diameter bridge plug capable of realizing single upper seal fracturing and method |
| CN111608611B (en) * | 2020-06-09 | 2023-10-13 | 中国石油天然气集团有限公司 | Large-diameter bridge plug capable of realizing single-upper-seal fracturing and method |
| CN112081653A (en) * | 2020-08-28 | 2020-12-15 | 王玉华 | Vortex pressure boost heat abstractor |
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