CN112413140A - But mud valve that self-cleaning's leakproofness is good - Google Patents
But mud valve that self-cleaning's leakproofness is good Download PDFInfo
- Publication number
- CN112413140A CN112413140A CN202011373647.0A CN202011373647A CN112413140A CN 112413140 A CN112413140 A CN 112413140A CN 202011373647 A CN202011373647 A CN 202011373647A CN 112413140 A CN112413140 A CN 112413140A
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- Prior art keywords
- valve
- valve body
- sealing
- sludge
- self
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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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—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 with screw-spindle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
- F16K1/385—Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
Abstract
The invention discloses a self-cleaning mud valve with good sealing performance, which comprises a valve body, wherein a valve switch driving device is arranged above the inside of the valve body, a valve double sealing device is arranged at the center of the inside of the valve body, a self-cleaning device is arranged on the valve body, the valve double sealing device seals the valve body by using two conical sealing blocks, then the valve is cleaned by the self-cleaning device, water is drained by elastic expansion of the lower conical sealing block, the valve can be used more conveniently, a controller is arranged above the outer side surface of the valve body, and a control signal output end of the controller is electrically connected with the valve switch driving device and the self-cleaning device. The invention has the advantages of simple structure and strong practicability.
Description
Technical Field
The invention relates to the field of mud valve related equipment, in particular to a mud valve which can be automatically cleaned and has good sealing performance.
Background
In the prior art, the mud valve comprises a valve body, a valve cover, a valve rod and a valve clack, wherein a fluid channel is arranged in an inner cavity of the valve body, a sealing surface of the valve body is arranged in the channel, a sealing surface of the valve clack is arranged at the lower end of the valve clack, the valve clack is arranged in the inner cavity of the valve body, and the valve clack can be lowered or lifted through the valve rod and can be contacted with or separated from the sealing surface of the valve. The disadvantages are that: because the medium is the mud of taking the granule, at the in-process that the valve clack opened or closed, mud can remain between the sealed face of valve clack and the sealed face of valve body, causes the sealed face of valve clack can't compress tightly the sealed face of valve body, makes the valve unable sealed.
In CN 201721282383-ditch slot type mud valve, through setting up the ditch slot type clamp, strutting arrangement, the screw rod, stop gear, the disc, first belt pulley, the protective housing, positive and negative motor, the second belt pulley, mutually supporting of belt and controlling means, the problem of current ditch slot type mud valve poor stability and inconvenient use has been solved, this ditch slot type mud valve no longer needs user's manual opening when using, thereby the labour has been saved, user's time has been practiced thrift, and the ditch slot type mud valve adopts the ditch slot type clamp to be connected with the pipeline, setting through strutting arrangement, can play reinforced effect to the valve clack, the situation that rocks appears when having avoided the valve clack to use, stability when having improved the valve clack and using, through stop gear's setting, the situation that appears rocking when having avoided the disc to use, stability when having improved the disc and using.
However, when the mud valve is used, the mud is discharged from the inside, and the mud often contains hard objects such as small stones, which easily damages the gasket in the mud valve and damages the mud valve.
Disclosure of Invention
The invention aims to solve the problems and designs a mud valve which can be automatically cleaned and has good sealing performance.
The technical scheme of the invention is that the mud valve with the advantages of automatic cleaning and good sealing performance comprises a valve body, a valve switch driving device is arranged above the inside of the valve body, a valve double sealing device is arranged at the center of the inside of the valve body, a self-cleaning device is arranged on the valve body, the valve double sealing device seals the valve body by using two conical sealing blocks, the valve is cleaned by the self-cleaning device, water is drained by elastic expansion of the lower conical sealing block, the valve can be used more conveniently, a controller is arranged above the outer surface of the valve body, and a control signal output end of the controller is electrically connected with the valve switch driving device and the self-cleaning device.
Valve switch drive arrangement includes little step motor is installed to the inside top of valve body, little step motor's rotatory end is upwards, the driving gear is installed to little step motor's rotatory end, the fixed stop is installed to the inside top of valve body, the fixed stop is located little step motor below, the department installs the screw thread sleeve pipe at fixed stop center, install the screw sleeve pipe in the screw thread sleeve pipe, screw sleeve pipe and screw thread sleeve pipe threaded connection, screw sleeve pipe and driving gear interlock mutually, the rubber packing pad is installed to screw thread sleeve pipe below, rubber packing pad and screw thread sleeve pipe sealing connection, the inside upper surface center department of valve body installs electric telescopic handle, electric telescopic handle inserts inside the screw sleeve pipe, electric telescopic handle and screw thread sleeve pipe swing joint.
The double sealing device of the valve comprises a valve body, wherein a sludge flow port is formed in the center of the interior of the valve body, an upper conical groove is formed in the upper end of the sludge flow port, an upper conical sealing block is arranged in the upper conical groove and fixedly connected with a screw sleeve, an upper annular conical sealing gasket is arranged on the lower surface of the upper conical sealing block, a through hole is formed in the center of the upper conical sealing block, a fixing rod is movably arranged in the through hole and fixedly connected with the telescopic end of an electric telescopic rod, two sealing pistons are arranged at the upper end and the lower end of the fixing rod, the upper sealing piston is movably connected with the screw sleeve, the lower sealing piston is movably connected with the through hole, a fixed stop block is arranged below the lower sealing piston and fixedly connected with the fixing rod, and the fixed stop block is movably connected with the through hole, the sludge flow port lower extreme is opened there is conical recess down, install down conical sealed piece in the conical recess down, install down ring toper sealed pad down on the conical sealed piece lower surface, conical sealed piece upper surface is opened down has the round hole, install extension spring in the round hole, the connecting rod is installed to the extension spring top, connecting rod and dead lever fixed connection, connecting rod and round hole swing joint, little sealing piston is installed to the connecting rod lower extreme, little sealing piston and round hole sealing connection.
The self-cleaning device comprises a sludge inlet pipe arranged above the side surface of one side of the valve body, the sludge inlet pipe is positioned below the fixed baffle plate, the sludge inlet pipe is positioned above the sludge circulating port, one end of the sludge inlet pipe is provided with a first connecting flange, a sludge discharge pipe is arranged below the side surface of the other side of the valve body, the sludge discharge pipe is positioned below the sludge circulation port, one end of the sludge discharge pipe is provided with a second connecting flange, an annular water pipe is arranged in the valve body, the annular water pipe is sleeved at the center of the sludge circulation port, the annular water pipe is fixedly connected with the valve body, a plurality of water spraying pipes are arranged at the center of the sludge circulating port, the water spraying pipe is fixedly connected with the annular water pipe, a water inlet pipe is arranged on the valve body and fixedly connected with the annular water pipe, and a cleaning electromagnetic valve is installed on the water inlet pipe.
The water inlet pipe is fixedly connected with an external water pipe.
The tip of the upper conical sealing block faces downwards, and the tip of the lower conical sealing block faces upwards
The lower conical sealing block stretches the extension spring by receiving water pressure, so that a gap is formed between the lower conical sealing block and the lower conical groove for water drainage.
And the control signal output end of the controller is electrically connected with the small stepping motor, the electric telescopic rod and the cleaning electromagnetic valve.
The mud valve which is manufactured by the technical scheme of the invention and has good sealing performance can seal the valve body through the upper conical sealing block and the lower conical sealing block, so that the valve body can be better sealed, meanwhile, when the rubber pad of the upper conical sealing block is damaged, the lower conical sealing block can also seal the valve body, thereby the valve body can be better used, and simultaneously, through the extension spring on the lower conical sealing block, can elastically stretch out and draw back the lower conical sealing block, is convenient to seal, can effectively wash the valve body after the valve body is used up by spraying water through the annular water pipe, discharges the washed water through the elastic stretching of the lower conical sealing block, thereby wash the valve body totally, guarantee the cleanliness factor of valve body, this device simple structure, convenient operation.
Drawings
FIG. 1 is a schematic structural view of a self-cleaning, good-sealing mud valve according to the present invention;
FIG. 2 is a schematic view of the upper conical sealing block of the present invention;
FIG. 3 is a schematic view of the lower conical seal block of the present invention;
FIG. 4 is a schematic view of a self-cleaning apparatus of the present invention;
in the figure, 1, a valve body; 2. a controller; 3. a small stepper motor; 4. a driving gear; 5. fixing the partition board; 6. a threaded bushing; 7. a screw sleeve; 8. a rubber gasket; 9. an electric telescopic rod; 10. a sludge circulation port; 11. an upper conical groove; 12. an upper conical sealing block; 13. an upper annular tapered gasket; 14. a through hole; 15. fixing the rod; 16. a sealing piston; 17. fixing a stop block; 18. a lower conical recess; 19. a lower conical sealing block; 20. a lower ring conical seal gasket; 21. a circular hole; 22. an extension spring; 23. a connecting rod; 24. a small seal piston; 25. a sludge inlet pipe; 26. a first connecting flange; 27. a sludge discharge pipe; 28. a second connecting flange; 29. an annular water pipe; 30. a water spray pipe; 31. a water inlet pipe; 32. and cleaning the electromagnetic valve.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings, as shown in FIGS. 1-4, in this embodiment:
firstly, connecting the device with an external power supply, connecting the sludge inlet pipe 25 with an external sewage pipeline, connecting the sludge discharge pipe 27 with an external sludge collecting device, and controlling the device to operate through the controller 2;
when the device needs to discharge sludge, the sludge enters the valve body 1 through the sludge inlet pipe 25 and is stored in the valve body 1, at the moment, the controller 2 controls the small stepping motor 3 to start working, the small stepping motor 3 rotates to drive the driving gear 4 to start rotating, the driving gear 4 rotates to drive the screw sleeve 7 to start rotating, the screw sleeve 7 rotates in the threaded sleeve 6, so that the screw sleeve 7 starts to slowly rise, at the moment, the screw sleeve 7 slowly rises to drive the upper conical sealing block 12 to start rising, the upper conical sealing gasket 13 on the upper conical sealing block 12 is separated from the upper conical groove 11, meanwhile, the controller 2 controls the electric telescopic rod 9 to start working, the electric telescopic rod 9 starts to extend out to drive the fixed rod 15 to start moving downwards, the sealing piston 16 on the fixed rod 15 starts to slide with the screw sleeve, and simultaneously, the fixed rod 15 descends to drive the connecting rod 23 to start descending, the connecting rod 23 descends to drive the lower conical sealing block 19 to descend, so that the lower annular conical sealing gasket 20 is separated from the lower conical groove 18, and at the moment, sludge can be discharged through the sludge through-flow port 10 and the sludge discharge pipe 27;
after the sludge is discharged, the controller 2 controls the small stepping motor 3 to rotate reversely, the small stepping motor 3 rotates reversely to enable the upper conical sealing block 12 to fall into the upper conical groove 11, the upper conical sealing block 12 is sealed with the upper conical groove 11 through the upper conical sealing gasket 13, the controller 2 controls the electric telescopic rod 9 to shrink, the electric telescopic rod 9 shrinks to drive the lower conical sealing block 19 to rise, the lower conical groove 18 is sealed with the lower conical sealing block through the lower conical sealing gasket 20, meanwhile, the fixed stop 17 below the fixed rod shrinks into the through hole 14, the through hole 14 is sealed through the fixed stop 17 and the sealing piston 16, the controller 2 controls the cleaning electromagnetic valve 32 to be opened, external clear water enters the annular water pipe 29 through the water inlet pipe 31, and water is sprayed into the sludge flow port 10 through the water spray pipe 30 on the annular water pipe 29, water is stored in the sludge circulation port 10, when the water pressure in the sludge circulation port reaches a certain degree, the water pulls the extension spring 22 open through the water pressure of the water, so that a gap is generated between the lower conical sealing block 19 and the lower conical groove 18, the water is discharged into the sludge discharge pipe 27 through the gap, the sludge discharge pipe 27 is washed, and the water is discharged.
Through the above operation, through the sealed of conical seal piece, can make the leakproofness of valve body obtain the reinforcing, seal valve body 1 through last conical seal piece 12 and conical seal piece 19 down, can make the valve body can effectually seal, and flexible through conical seal piece 19's elasticity down makes valve body 1 can in time discharge water after wasing simultaneously.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides a mud valve that self-cleaning's leakproofness is good, includes valve body (1), its characterized in that, the inside top of valve body (1) is equipped with valve switch drive arrangement, valve body (1) inside center department is equipped with valve double sealing device, be equipped with self-cleaning device on valve body (1), valve double sealing device seals the valve body through using two conical seal blocks, and the valve is washd to the rethread self-cleaning device, and the elastic expansion of the conical seal block through the below carries out the drainage, can make the more convenient use of valve, valve body (1) outside surface top is equipped with controller (2), the control signal output and valve switch drive arrangement and the self-cleaning device electric connection of controller (2).
2. The mud valve capable of being automatically cleaned and good in sealing performance as claimed in claim 1, wherein the valve switch driving device comprises a valve body (1) with a small stepping motor (3) mounted at the upper part inside, the rotating end of the small stepping motor (3) faces upwards, a driving gear (4) mounted at the rotating end of the small stepping motor (3), a fixed partition plate (5) mounted at the upper part inside the valve body (1), the fixed partition plate (5) is located below the small stepping motor (3), a threaded sleeve (6) is mounted at the center of the fixed partition plate (5), a threaded sleeve (7) is mounted in the threaded sleeve (6), the threaded sleeve (7) is in threaded connection with the threaded sleeve (6), the threaded sleeve (7) is meshed with the driving gear (4), a rubber sealing gasket (8) is mounted below the threaded sleeve (6), rubber seal pad (8) and screw rod sleeve pipe (7) sealing connection, valve body (1) inside upper surface center department installs electric telescopic handle (9), inside screw rod sleeve pipe (7) were inserted in electric telescopic handle (9), electric telescopic handle (9) and screw rod sleeve pipe (7) swing joint.
3. The mud valve as claimed in claim 1, wherein the valve double sealing device comprises a valve body (1) with a mud flow port (10) at the center, an upper conical recess (11) at the upper end of the mud flow port (10), an upper conical sealing block (12) installed in the upper conical recess (11), the upper conical sealing block (12) fixedly connected to the screw casing (7), an upper conical sealing pad (13) installed on the lower surface of the upper conical sealing block (12), a through hole (14) formed at the center of the upper conical sealing block (12), a fixing rod (15) movably installed in the through hole (14), the fixing rod (15) fixedly connected to the telescopic end of the electric telescopic rod (9), two sealing pistons (16) installed at the upper and lower ends of the fixing rod (15), the sealing piston (16) and the screw sleeve (7) are movably connected above, the sealing piston (16) and the through hole (14) are movably connected below, the fixed stop block (17) is installed below the sealing piston (16) below, the fixed stop block (17) is fixedly connected with the fixed rod (15), the fixed stop block (17) is movably connected with the through hole (14), the lower end of the sludge flow port (10) is provided with a lower conical groove (18), a lower conical sealing block (19) is installed in the lower conical groove (18), a lower annular conical sealing gasket (20) is installed on the lower surface of the lower conical sealing block (19), the upper surface of the lower conical sealing block (19) is provided with a round hole (21), an extension spring (22) is installed in the round hole (21), and a connecting rod (23) is installed above the extension spring (22), connecting rod (23) and dead lever (15) fixed connection, connecting rod (23) and round hole (21) swing joint, little sealing piston (24) are installed to connecting rod (23) lower extreme, little sealing piston (24) and round hole (21) sealing connection.
4. The mud valve capable of being automatically cleaned and having good sealing performance as claimed in claim 1, wherein the self-cleaning device comprises a valve body (1) having a side surface on one side thereof provided with a sludge inlet pipe (25), the sludge inlet pipe (25) is positioned below a fixed partition plate (5), the sludge inlet pipe (25) is positioned above a sludge through hole (10), one end of the sludge inlet pipe (25) is provided with a first connecting flange (26), the other side surface of the valve body (1) is provided with a sludge discharge pipe (27), the sludge discharge pipe (27) is positioned below the sludge through hole (10), one end of the sludge discharge pipe (27) is provided with a second connecting flange (28), the valve body (1) is internally provided with an annular water pipe (29), and the annular water pipe (29) is sleeved at the center of the sludge through hole (10), annular water pipe (29) and valve body (1) fixed connection, the central department of sludge circulation mouth (10) has a plurality of spray pipes (30), spray pipe (30) and annular water pipe (29) fixed connection, be equipped with inlet tube (31) on valve body (1), inlet tube (31) and annular water pipe (29) fixed connection, install on inlet tube (31) and wash solenoid valve (32).
5. A self-cleaning, good-sealing mud valve as claimed in claim 4, wherein said inlet pipe (31) is fixedly connected to an external water pipe.
6. A self-cleaning, good sealing dredge valve according to claim 3 characterized in that the top of the upper conical sealing block (12) is downward and the top of the lower conical sealing block (19) is upward.
7. The self-cleaning mud valve with good sealing performance as claimed in claim 1, wherein the lower conical sealing block (19) stretches the extension spring (22) by receiving water pressure, so that the lower conical sealing block (19) and the lower conical groove (18) generate a gap for draining water.
8. The mud valve capable of being automatically cleaned and good in sealing performance as claimed in claim 1, wherein a control signal output end of the controller (2) is electrically connected with the small stepping motor (3), the electric telescopic rod (9) and the cleaning electromagnetic valve (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011373647.0A CN112413140A (en) | 2020-11-30 | 2020-11-30 | But mud valve that self-cleaning's leakproofness is good |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011373647.0A CN112413140A (en) | 2020-11-30 | 2020-11-30 | But mud valve that self-cleaning's leakproofness is good |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112413140A true CN112413140A (en) | 2021-02-26 |
Family
ID=74828896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011373647.0A Withdrawn CN112413140A (en) | 2020-11-30 | 2020-11-30 | But mud valve that self-cleaning's leakproofness is good |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112413140A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114578027A (en) * | 2022-02-09 | 2022-06-03 | 江苏万兴石油装备有限公司 | Multifunctional produced liquid three-phase metering valve group |
| CN114669439A (en) * | 2022-05-09 | 2022-06-28 | 浙江昌鸿制盖有限公司 | Easy-to-open cover glue injection device capable of cleaning glue injection machine head |
| CN114700198A (en) * | 2022-04-06 | 2022-07-05 | 重庆嘉凯捷仪器仪表有限公司 | Pneumatic injection valve |
-
2020
- 2020-11-30 CN CN202011373647.0A patent/CN112413140A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114578027A (en) * | 2022-02-09 | 2022-06-03 | 江苏万兴石油装备有限公司 | Multifunctional produced liquid three-phase metering valve group |
| CN114578027B (en) * | 2022-02-09 | 2023-05-26 | 江苏万兴石油装备有限公司 | Multifunctional three-phase metering valve group for produced liquid |
| CN114700198A (en) * | 2022-04-06 | 2022-07-05 | 重庆嘉凯捷仪器仪表有限公司 | Pneumatic injection valve |
| CN114700198B (en) * | 2022-04-06 | 2022-11-25 | 重庆嘉凯捷仪器仪表有限公司 | Pneumatic injection valve |
| CN114669439A (en) * | 2022-05-09 | 2022-06-28 | 浙江昌鸿制盖有限公司 | Easy-to-open cover glue injection device capable of cleaning glue injection machine head |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210226 |