CN109210253A - A kind of stable needle-type throttle valve that throttles - Google Patents
A kind of stable needle-type throttle valve that throttles Download PDFInfo
- Publication number
- CN109210253A CN109210253A CN201811447605.XA CN201811447605A CN109210253A CN 109210253 A CN109210253 A CN 109210253A CN 201811447605 A CN201811447605 A CN 201811447605A CN 109210253 A CN109210253 A CN 109210253A
- Authority
- CN
- China
- Prior art keywords
- needle
- valve
- packing box
- actuating sleeve
- type throttle
- 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
- 238000012856 packing Methods 0.000 claims abstract description 34
- 238000013016 damping Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 238000006467 substitution reaction 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic 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
- 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
Abstract
The invention discloses a kind of stable needle-type throttle valves that throttles comprising valve body and needle, side inlet, outlet at bottom and the top opening which has valve chamber and be connected to valve chamber；Body base outlet is internally provided with valve seat；Body top opening is equipped with packing box；The upper end of the packing box is internally embedded damping ring；The lower end internal lock of the packing box has bar sealing；Actuating sleeve is cased with outside the upper end of the packing box；The actuating sleeve lower end is cased with pressure cap；The pressure cap is connect with body top open-top screw thread；The upper end of the needle is connect with driving structure；The middle upper end of the needle is flexibly connected with actuating sleeve by screw thread；The middle lower end of the needle is the sealing surface with bar sealing and damping ring cooperation；The lower end of the needle is the syringe needle cooperated with valve seat.The present invention can keep needle to stablize under high pressure workload, improve restriction effect；Have the function of vibration damping simultaneously, extends the service life of product.
Description
Technical field
The present invention relates to oil exploration equipment technical fields, and in particular to a kind of stable needle-type throttle valve that throttles.
Background technique
Needle-type throttle valve is connect on throttle pipe road, causes resistance to liquid stream by uninterrupted with control throttle valve
Generate back pressure, the equipment for flowing out borehole fluid under slave mode.It adjusts flow and needs to rotate handwheel drive needle walking, change
Fluid plays the role of throttling by the area of passage of valve seat.
Although needle-type throttle valve has the characteristics that structure is simple, easy to maintain, low in cost, there is also stability not
Enough, as the disadvantage that moving causes flow inaccurate occurs in workload variation needle；And at work, needle is in cantilever-shaped
State, the serious vibration under high velocity fluid strikes are easy to happen the case where needle is broken.These disadvantages under high pressure operating condition especially
It is prominent.
Therefore, it is badly in need of a kind of needle-type throttle valve at present, stable production flow is provided for oil well head, and improve internal junction
Structure vibration resistance prolongs the service life.
Summary of the invention
The object of the present invention is to provide a kind of stable needle-type throttle valves that throttles, and can keep under high pressure workload
Needle is stablized, and restriction effect is improved；Simultaneously have the function of vibration damping, can high load generate variation in the case where absorbing load
The failure energy generated when variation extends the service life of product.
In order to achieve the above objectives, the present invention provides a kind of stable needle-type throttle valves that throttles comprising valve body and needle,
Side inlet, outlet at bottom and the top opening that the valve body has valve chamber and is connected to valve chamber；The internal setting in body base outlet
There is the valve seat for the downward water conservancy diversion of convection current body；Body top opening is equipped with packing box；It is adopted inside the upper end of the packing box
Damping ring is embedded in the mode of clearance fit；The lower end internal lock of the packing box has bar sealing；Outside the upper end of the packing box
Portion is cased with actuating sleeve；The actuating sleeve lower end is cased with pressure cap；The pressure cap is connect with body top open-top screw thread, for that will drive
The sealing surface compact together with packing box is covered in body top opening；The needle is mounted on the actuating sleeve, packing box, vibration damping
In ring and the centre bore of bar sealing and extend at the valve seat；The upper end of the needle is connect with driving structure；The needle
Middle upper end be flexibly connected with actuating sleeve by screw thread；The middle lower end of the needle is the sealing with bar sealing and damping ring cooperation
Face；The lower end of the needle is the syringe needle cooperated with valve seat；The needle is driven to move up and down by rotary drive structure, in turn
Change the syringe needle and generates different throttle-flows from the relative position of valve seat.
The stable needle-type throttle valve of above-mentioned throttling, wherein the needle-type throttle valve further includes the lock for locking needle
Tight device；The locking device includes: latch segment, screw and set lever；The two sides of the actuating sleeve open up tapped through hole；Institute
It states and is put into latch segment in tapped through hole；The screw is threadedly coupled back spin with the set lever into tapped through hole and by the lock
Tight block resists the needle.
The stable needle-type throttle valve of above-mentioned throttling, wherein the material of the latch segment is soft copper.
The stable needle-type throttle valve of above-mentioned throttling, wherein the driving structure is handwheel or handle.
The stable needle-type throttle valve of above-mentioned throttling, wherein the material of the syringe needle is hard alloy.
The stable needle-type throttle valve of above-mentioned throttling, wherein the valve seat is connected through a screw thread with valve body.
The stable needle-type throttle valve of above-mentioned throttling, wherein the material of the damping ring is nonmetallic nylon material.
Compared with the existing technology, the invention has the following advantages:
The present invention is mounted on the damping ring between packing box and needle, reduces load pressure and impacts caused by lower needle vibration
Internal sabotage and needle moving；The locking device for being mounted on actuating sleeve two sides further keeps the stabilization of needle, improves throttling effect
Fruit.
The present invention can keep needle to stablize under high pressure workload, improve restriction effect；There is vibration damping simultaneously
Function, the failure energy that can be generated when absorbing load variation in the case where high load generates variation, extends the use of product
Service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the stable needle-type throttle valve of present invention throttling；
Fig. 2 is the partial enlargement diagram of locking device in Fig. 1.
Specific embodiment
Below in conjunction with attached drawing, by specific embodiment, the invention will be further described, these embodiments are merely to illustrate
The present invention is not limiting the scope of the invention.
The present invention provides a kind of stable needle-type throttle valves that throttles comprising valve body 1 and needle 3, the valve body 1 have valve
Chamber and the side inlet 30 being connected to valve chamber, outlet at bottom 20 and top opening；1 outlet at bottom 20 of valve body, which is internally provided with, to be used for
To the valve seat 2 of the downward water conservancy diversion of fluid；Optionally, the valve seat 2 is connected through a screw thread with valve body 1；The installation of 1 top open part of valve body
There is packing box 6；The mode being gap-matched inside the upper end of the packing box 6 is embedded in damping ring 7；Optionally, the vibration damping
The material of ring 7 is nonmetallic nylon material.The lower end internal lock of the packing box 6 has bar to seal 5；The upper end of the packing box 6
Outside is cased with actuating sleeve 9；9 lower end of actuating sleeve is cased with pressure cap 8；The pressure cap 8 is threadedly coupled with 1 top opening of valve body, is used
In by actuating sleeve 9 together with packing box 6 sealing surface compact in 1 top open part of valve body；The needle 3 is mounted on the actuating sleeve
9, the centre bore of packing box 6, damping ring 7 and bar sealing 5 is interior and extends at the valve seat 2；The upper end of the needle 3 and driving
Structure connection；The middle upper end of the needle 3 is flexibly connected with actuating sleeve 9 by screw thread；The middle lower end of the needle 3 is close with bar
The sealing surface that envelope 5 and damping ring 7 cooperate；The lower end of the needle 3 is the syringe needle cooperated with valve seat 2；Optionally, the syringe needle
Material is hard alloy；It drives the needle 3 to move up and down by rotary drive structure, and then changes the syringe needle and valve seat 2
Relative position to generate different throttle-flows.Optionally, the driving structure is handwheel 10 or handle.
The stable needle-type throttle valve of above-mentioned throttling, wherein the needle-type throttle valve further includes the lock for locking needle 3
Tight device；The locking device includes: latch segment 13, screw 12 and set lever 11；The two sides of the actuating sleeve 9 open up screw thread
Through-hole；Latch segment 13 is put into the tapped through hole；Optionally, the material of the latch segment 13 is soft copper；The screw 12 with
The set lever 11 is threadedly coupled back spin and resists the needle 3 into tapped through hole and by the latch segment 13.
In this embodiment, as shown in Figure 1, being equipped with screw thread at outlet at bottom 20 in 1 inside of valve body, valve seat 2 is logical
It crosses and is threaded on 20 position of outlet at bottom of valve body 1, the flow media entered from side inlet 30 can be played and be led downwards
The effect of stream, for controlling the on off operating mode of throttle valve.Packing box 6 is installed in 1 top open part of valve body, bar sealing 5 passes through
Nut 4 is locked inside 6 lower end of packing box, and in the upper end of packing box 6, the mode of clearance fit is embedded in damping ring 7.9 sets of actuating sleeve
After on the packing box 6, upper pressing cap 8 is covered on the step of 9 outer rim of actuating sleeve, by 1 upper end of the bottom surface threaded hole of pressure cap 8 and valve body
Stud be linked together and screw, actuating sleeve 9 together with the sealing cone of packing box 6 be pressed in valve body 1 top opening bore
On face.
Needle 3 is mounted in the centre bore of 6 component of actuating sleeve 9 and packing box.3 lower end of needle is needle made of hard alloy
Head, the throttle-flow different from the variation generation of the relative position of valve seat 2；Lower end is matched with bar sealing 5 and damping ring 7 in needle 3
The sealing surface of conjunction, the impact energy that fluid generates 3 syringe needle of needle are buffered on damping ring 7, play another side lever sealing 5 of protection
And keep the effect of 3 monolithic stability of needle；2 upper end of valve seat is fitted together with handwheel 10, and middle upper end is stud, in actuating sleeve 9
Under the action of portion's screw thread, rotation hand wheel 10 drives needle 3 to move up and down, and changes flow of the fluid by exit.
Locking device is housed in the two sides of actuating sleeve 9 simultaneously.As shown in Fig. 2, tapped through hole is opened up in 9 two sides of actuating sleeve,
It is put into latch segment 13, screws on screw 12 and set lever 11.When throttle valve needs to adjust flow, set lever 11 is unclamped, is turned
It starts to take turns 10 adjusting flows；After the completion of adjusting, set lever 11 is screwed again after tightening screw 12, latch segment 13 is made to bite needle 3
Screw thread do not allow its random moving, since latch segment 13 uses the preferable soft copper of extensibility, when locking, will not be damaged on needle 3
Screw thread guarantees to improve the stability adjusted while regulatory function.
In conclusion the present invention provides a kind of high tension pin-type throttle valve for throttling stable, wherein the valve seat 2 passes through spiral shell
Line is connected on the export direction of 1 lower part of valve body.1 top of valve body is equipped with packing box 6, needle 3, actuating sleeve 9, the packing box 6
Inside is equipped with bar sealing 5 and damping ring 7, and needle 3 passes through the inner hole of bar sealing 5 and damping ring 7, and wherein damping ring 7 uses non-gold
Belong to nylon material, there is excellent damping property, be assemblied in by way of clearance fit between packing box 6 and needle 3, work as height
When pressure load is impacted on needle 3, damping ring 7 plays the role of buffering, avoids the vibration damage as caused by fluid impact
Needle 3 or bar sealing 5, while avoiding guaranteeing the stability of flow control due to about 3 moving of needle caused by vibrating.Packing
Actuating sleeve 9 on box 6 is equipped with internal screw thread and is connected to together with needle 3, is in addition equipped with locking device in the two sides of actuating sleeve 9,
Set lever is used after rotating flow of the adjustment needle 3 of handwheel 10 to needs including bolt, set lever 11, latch segment 13
11 bolt on and latch segment 13, withstand needle 3 ensure will not due to moving under the impact of valve chamber internal high pressure fluid, while with
Needle 3 is held out against and the latch segment 13 that contacts uses soft copper material, protect on needle 3 screw thread will not be damaged can continue to using.
Needle-type throttle valve provided by the present invention, its advantages include: first, being mounted between packing box 6 and needle 3
Damping ring 7, reduce load pressure impact lower needle 3 vibrate caused by 3 moving of internal sabotage and needle；Second, installation
Locking device in 9 two sides of actuating sleeve further keeps the stabilization of needle 3, improves restriction effect.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (7)
1. a kind of stable needle-type throttle valve that throttles, which is characterized in that including valve body and needle, which has valve chamber and and valve
Side inlet, outlet at bottom and the top opening of chamber connection；Body base outlet is internally provided with for the downward water conservancy diversion of fluid
Valve seat；Body top opening is equipped with packing box；The mode being gap-matched inside the upper end of the packing box is embedded in
Damping ring；The lower end internal lock of the packing box has bar sealing；Actuating sleeve is cased with outside the upper end of the packing box；The driving
Set lower end is cased with pressure cap；The pressure cap is connect with body top open-top screw thread, for the sealing surface by actuating sleeve together with packing box
It is pressed on body top opening；The needle is mounted in the actuating sleeve, packing box, damping ring and the centre bore of bar sealing
And it extends at the valve seat；The upper end of the needle is connect with driving structure；Middle upper end and the actuating sleeve of the needle pass through
Screw thread is flexibly connected；The middle lower end of the needle is the sealing surface with bar sealing and damping ring cooperation；The lower end of the needle is
With the syringe needle of valve seat cooperation；It drives the needle to move up and down by rotary drive structure, and then changes the syringe needle and valve seat
Relative position to generate different throttle-flows.
2. throttle stable needle-type throttle valve as described in claim 1, which is characterized in that the needle-type throttle valve further includes using
In the locking device of locking needle；The locking device includes: latch segment, screw and set lever；The two sides of the actuating sleeve
Open up tapped through hole；Latch segment is put into the tapped through hole；The screw is threadedly coupled back spin into spiral shell with the set lever
The latch segment is simultaneously resisted the needle by line through-hole.
3. throttle stable needle-type throttle valve as claimed in claim 2, which is characterized in that the material of the latch segment is soft
Copper.
4. throttle stable needle-type throttle valve as described in claim 1, which is characterized in that the driving structure is handwheel or hand
Handle.
5. throttle stable needle-type throttle valve as described in claim 1, which is characterized in that the material of the syringe needle is hard conjunction
Gold.
6. throttle stable needle-type throttle valve as described in claim 1, which is characterized in that the valve seat and valve body pass through screw thread
Connection.
7. throttle stable needle-type throttle valve as described in claim 1, which is characterized in that the material of the damping ring is non-gold
Belong to nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447605.XA CN109210253A (en) | 2018-11-29 | 2018-11-29 | A kind of stable needle-type throttle valve that throttles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811447605.XA CN109210253A (en) | 2018-11-29 | 2018-11-29 | A kind of stable needle-type throttle valve that throttles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109210253A true CN109210253A (en) | 2019-01-15 |
Family
ID=64994567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811447605.XA Pending CN109210253A (en) | 2018-11-29 | 2018-11-29 | A kind of stable needle-type throttle valve that throttles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109210253A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1422418A1 (en) * | 2002-11-19 | 2004-05-26 | Robert Bosch Gmbh | Fuel injector for an internal combustion engine |
| CN201874520U (en) * | 2010-11-12 | 2011-06-22 | 盐城市阳标石油机械有限公司 | Cage type throttling valve |
| CN203548928U (en) * | 2013-10-10 | 2014-04-16 | 美国钻采系统(南京)有限公司 | Manual high-pressure well drilling wedge-shaped pin type throttling valve |
| CN204610897U (en) * | 2014-12-31 | 2015-09-02 | 美钻石油钻采系统工程（上海）有限公司 | Electric throttle valve |
| CN204852392U (en) * | 2015-06-19 | 2015-12-09 | 江苏腾龙石化机械有限公司 | Choke valve with adjustable gas production |
| CN206626251U (en) * | 2017-04-05 | 2017-11-10 | 盐城旭东机械有限公司 | A kind of idle call has the throttle valve gear of shock-absorbing function |
| CN208122823U (en) * | 2018-04-28 | 2018-11-20 | 江苏亿德隆石油机械有限公司 | A kind of novel cage type throttling valve |
| CN209294513U (en) * | 2018-11-29 | 2019-08-23 | 美钻深海能源科技研发（上海）有限公司 | A kind of stable needle-type throttle valve that throttles |
-
2018
- 2018-11-29 CN CN201811447605.XA patent/CN109210253A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1422418A1 (en) * | 2002-11-19 | 2004-05-26 | Robert Bosch Gmbh | Fuel injector for an internal combustion engine |
| CN201874520U (en) * | 2010-11-12 | 2011-06-22 | 盐城市阳标石油机械有限公司 | Cage type throttling valve |
| CN203548928U (en) * | 2013-10-10 | 2014-04-16 | 美国钻采系统(南京)有限公司 | Manual high-pressure well drilling wedge-shaped pin type throttling valve |
| CN204610897U (en) * | 2014-12-31 | 2015-09-02 | 美钻石油钻采系统工程（上海）有限公司 | Electric throttle valve |
| CN204852392U (en) * | 2015-06-19 | 2015-12-09 | 江苏腾龙石化机械有限公司 | Choke valve with adjustable gas production |
| CN206626251U (en) * | 2017-04-05 | 2017-11-10 | 盐城旭东机械有限公司 | A kind of idle call has the throttle valve gear of shock-absorbing function |
| CN208122823U (en) * | 2018-04-28 | 2018-11-20 | 江苏亿德隆石油机械有限公司 | A kind of novel cage type throttling valve |
| CN209294513U (en) * | 2018-11-29 | 2019-08-23 | 美钻深海能源科技研发（上海）有限公司 | A kind of stable needle-type throttle valve that throttles |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203272806U (en) | Static balance valve | |
| CN101586667B (en) | Fine-tuning valve of high pressure difference style | |
| CN209294513U (en) | A kind of stable needle-type throttle valve that throttles | |
| CN202327267U (en) | Vacuum breaker valve | |
| CN201412533Y (en) | High-pressure difference and fine adjustment control valve | |
| CN109210253A (en) | A kind of stable needle-type throttle valve that throttles | |
| CN106949257A (en) | A kind of new adjustable ball valve | |
| CN102563111B (en) | High-pressure and energy-saving universal type parallel double-valve flap gate valve | |
| CN201554869U (en) | Differential-pressure-free full-function valve | |
| CN204852392U (en) | Choke valve with adjustable gas production | |
| CN209892782U (en) | Ball gate regulating valve | |
| CN203374244U (en) | Inner cage valve sleeve type throttle valve | |
| CN105649574B (en) | Adjustable bean | |
| CN104612583A (en) | Hydraulic hammer flow diversion mechanism, hydraulic hammer and down-hole drilling rig | |
| CN203777759U (en) | Automatic backwash filter device | |
| CN206513940U (en) | A kind of new back seal butterfly valve | |
| CN207945331U (en) | A kind of cement mortar grouting safety valve | |
| CN106523726A (en) | Two-phase fluid large-flow precise control device | |
| CN2477900Y (en) | Full metal sealing valve | |
| CN203604686U (en) | Plunger type throttle valve | |
| CN208057972U (en) | It is a kind of to idle discharge steam valve | |
| CN204609759U (en) | Hydro-efflux Hammer diversion mechanism, Hydro-efflux Hammer and down hole drill device | |
| CN206320315U (en) | The adjustable butterfly valve of angle of release | |
| CN201202437Y (en) | All-metal valve for oil extraction, well washing and acidizing | |
| CN2257341Y (en) | High temp. high pressure stop cock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |