CN110131424A - A kind of preferable butterfly valve of leakproofness - Google Patents
A kind of preferable butterfly valve of leakproofness Download PDFInfo
- Publication number
- CN110131424A CN110131424A CN201910532129.XA CN201910532129A CN110131424A CN 110131424 A CN110131424 A CN 110131424A CN 201910532129 A CN201910532129 A CN 201910532129A CN 110131424 A CN110131424 A CN 110131424A
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- China
- Prior art keywords
- shaft sleeve
- butterfly valve
- ring
- valve rod
- valve
- 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
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- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16K1/16—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 pivoted closure-members
- F16K1/18—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 pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/224—Details of bearings for the axis of rotation
-
- 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
- F16K1/16—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 pivoted closure-members
- F16K1/18—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 pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of preferable butterfly valves of leakproofness, the valve rod being equipped in butterfly valve ontology inside it, one end of valve rod is correspondingly connected with handle, the other end of valve rod is correspondingly connected with butterfly valve plate, the inside of butterfly valve ontology is arranged in butterfly valve plate, Upper shaft sleeve and Lower shaft sleeve are socketed in the outer wall correspondence of valve rod, the top junction of valve rod Yu butterfly valve plate is arranged in Upper shaft sleeve, lower axle is set on the lower part junction of valve rod Yu butterfly valve plate, gap location between butterfly valve ontology and butterfly valve plate is correspondingly provided with seal washer, the upper end of seal washer and the outer wall of Upper shaft sleeve are correspondingly connected with, the lower end of seal washer and the outer wall of Lower shaft sleeve are correspondingly connected with.The present invention is sealed by the cooperation that Upper shaft sleeve O-ring, Lower shaft sleeve O-ring, seal washer, upper valve rod O-ring, lower valve rod O-ring increase association position, it can effectively guarantee medium when passing through or being truncated, medium, which will not be revealed completely and will not be contacted with intermediate valve rod (metalwork), leads to corrosion and damage.
Description
Technical field
The present invention relates to valve arrangement field, especially a kind of preferable butterfly valve of leakproofness.
Background technique
Valve can be used for controlling empty gas and water, steam, various corrosive medias, mud, oil product, liquid metal and radioactivity
The flowing of the various types fluid such as medium, mainly plays cutting and throttling action on pipeline.The opening and closing element of butterfly valve is a disk
The butterfly plate of shape rotates in valve body around the axis of its own, to achieve the purpose that opening and closing or adjusting.Butterfly valve not only structure letter
Single, small in size, light-weight, material consumption saves, installation dimension is small, driving moment is small, easy to operate, rapid, and can also be same
When have good flow regulating function and close sealing characteristics, be one of valve kind with fastest developing speed in recent ten years, butterfly
The use of valve is very extensive, and the kind and quantity used still is continuing to expand, and to high temperature, high pressure, heavy caliber, high sealing
Property, long-life, excellent control characteristic and the multi-functional development of a valve, reliability and other performance indicators reach higher
It is horizontal.The structural principle of butterfly valve is especially suitable for production large bore valves, and common butterfly valve has wafer type butterfly valve and flange form butterfly valve
Two kinds.Wafer type butterfly valve is that valve is connected between two pipe flanges with stud, and flange form butterfly valve is had on valve
Flange, with bolt by flanged joint use process on pipe flange in both ends on valve.Now existing butterfly valve structure in the market, only by
Valve rod, butterfly valve plate, seal washer are combined with each other to form sealing, this mechanism is under the action of Fluid pressure, valve rod and valve plate, butterfly valve
It can be leaked at body fits, under the media environment of acid and alkali corrosion, metal valve stem can be corroded；Solving valve plate and seal washer
Close-fitting when will lead to again switch it is not in place.Therefore, it is necessary to design a kind of preferable butterfly valve of leakproofness.
Summary of the invention
In order to overcome the defects of the prior art, a kind of preferable butterfly valve of leakproofness is provided.
The present invention is realized by following proposal:
A kind of preferable butterfly valve of leakproofness, including butterfly valve ontology, the valve being equipped in the butterfly valve ontology inside it
Bar, one end and the handle of the valve rod are correspondingly connected with, and the other end and the butterfly valve plate of the valve rod are correspondingly connected with, and the butterfly valve plate is set
It sets in the inside of butterfly valve ontology, is corresponded in the outer wall of the valve rod and be socketed with Upper shaft sleeve and Lower shaft sleeve, the Upper shaft sleeve setting exists
The top junction of valve rod and butterfly valve plate, the lower axle is set on the lower part junction of valve rod Yu butterfly valve plate, in the butterfly valve
Gap location between ontology and butterfly valve plate is correspondingly provided with seal washer, and the upper end of the seal washer and the outer wall of Upper shaft sleeve are corresponding
Connection, the lower end of the seal washer and the outer wall of Lower shaft sleeve are correspondingly connected with.
It is correspondingly provided with upper valve rod O-ring in the junction of the Upper shaft sleeve and valve rod, in the company of the Lower shaft sleeve and valve rod
The place of connecing is correspondingly provided with lower valve rod O-ring.
It is also corresponded in the outer wall of the valve rod and is socketed with top axle sleeve, the lower part of the top axle sleeve and the top of Upper shaft sleeve
It is correspondingly connected with, the top of the top axle sleeve and being correspondingly connected with for handle.
It is correspondingly provided with Upper shaft sleeve O-ring in the outer wall of the Upper shaft sleeve, is correspondingly provided with lower axle in the outer wall of the Lower shaft sleeve
Cover O-ring.
The Upper shaft sleeve O-ring includes the first Upper shaft sleeve O-ring being arranged between Upper shaft sleeve and butterfly valve ontology and setting
The second Upper shaft sleeve O-ring between Upper shaft sleeve and butterfly valve plate；
The Lower shaft sleeve O-ring includes the first Lower shaft sleeve O-ring being arranged between Lower shaft sleeve and butterfly valve ontology and sets
Set the second Lower shaft sleeve O-ring between Lower shaft sleeve and butterfly valve ontology.
The handle and valve rod pass through the corresponding releasable connection of fixed screw.
The invention has the benefit that
A kind of preferable butterfly valve of leakproofness of the present invention by Upper shaft sleeve, Lower shaft sleeve and Upper shaft sleeve O-ring, Lower shaft sleeve O-ring,
Seal washer, upper valve rod O-ring, lower valve rod O-ring increase the cooperation sealing at association position, can effectively guarantee medium logical
When crossing or being truncated, medium, which will not be revealed completely and will not be contacted with intermediate valve rod (metalwork), leads to corrosion and damage.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the preferable butterfly valve of leakproofness of the present invention.
Fig. 2 is the detail of construction on butterfly valve plate of the present invention periphery.
In figure: 1 is valve rod, and 21 be upper valve rod O-ring, and 22 be lower valve rod O-ring, and 3 be Upper shaft sleeve, and 4 be Lower shaft sleeve, and 5 are
Top axle sleeve, 61 be Upper shaft sleeve O-ring, and 611 be the first Upper shaft sleeve O-ring, and 612 be the second Upper shaft sleeve O-ring, and 62 be Lower shaft sleeve
O-ring, 621 be the first Lower shaft sleeve O-ring, and 622 be the second Lower shaft sleeve O-ring, and 7 be butterfly valve ontology, and 8 be butterfly valve plate, and 9 be sealing
Washer, 10 be handle, and 11 be fixed screw.
Specific embodiment
The preferred embodiment of the invention is further illustrated with reference to the accompanying drawing:
A kind of preferable butterfly valve of leakproofness, including butterfly valve ontology 7 are equipped with inside it in the butterfly valve ontology 7
Valve rod 1, one end and the handle 10 of the valve rod 1 are correspondingly connected with, and the other end and the butterfly valve plate 8 of the valve rod 1 are correspondingly connected with, described
The inside of butterfly valve ontology 7 is arranged in butterfly valve plate 8.The handle 10 and valve rod 1 pass through the corresponding releasable connection of fixed screw 11.In reality
In application, the handle for holding handle 10 is rotated, butterfly valve plate rotates in butterfly valve ontology under the drive of valve rod on border, to control
The opening and closing on tubulation road, in the application, the structure and connection type of the specific work process of butterfly valve and other related auxiliary components
It is well-known technique, details are not described herein, and difference is as described below.
Be socketed with Upper shaft sleeve 3 and Lower shaft sleeve 4 the outer wall of the valve rod 1 is corresponding, the setting of Upper shaft sleeve 3 valve rod 1 with
The lower part junction of valve rod 1 Yu butterfly valve plate 8 is arranged in the top junction of butterfly valve plate 8, the Lower shaft sleeve 4, in the butterfly valve sheet
Gap location between body 7 and butterfly valve plate 8 is correspondingly provided with seal washer 9, the upper end of the seal washer 9 and the outer wall of Upper shaft sleeve 3
It is correspondingly connected with, the lower end of the seal washer 9 and the outer wall of Lower shaft sleeve 4 are correspondingly connected with.Seal washer respectively with Upper shaft sleeve, lower axle
Set, butterfly valve ontology, butterfly valve plate form sealing, and butterfly valve is during either on or off, because of the cooperation phase of butterfly valve plate and butterfly valve washer
Guarantee sealing between mutually, so having prevented the leakage between butterfly valve washer and butterfly valve ontology.Pass through valve rod and butterfly valve ontology, butterfly valve
The cooperation of plate, seal washer improves the leakage hidden danger of butterfly valve, promotes the switch torsion of butterfly valve and guarantees switch in place.
It is correspondingly provided with upper valve rod O-ring 21 in the junction of the Upper shaft sleeve 3 and valve rod 1, in the Lower shaft sleeve 4 and valve rod
1 junction is correspondingly provided with lower valve rod O-ring 22.The upper valve rod O-ring 21 ensure that close between Upper shaft sleeve 3 and valve rod 1
Feng Xing, lower valve rod O-ring 22 ensure that the leakproofness between Lower shaft sleeve 4 and valve rod 1.Because of butterfly valve plate and Upper shaft sleeve, Lower shaft sleeve
And axle sleeve O-ring mutually forms sealing closed loop, therefore has prevented medium and leaked to valve rod.
It is also corresponded in the outer wall of the valve rod 1 and is socketed with top axle sleeve 5, lower part and the Upper shaft sleeve 3 of the top axle sleeve 5
Top is correspondingly connected with, the top of the top axle sleeve 5 and being correspondingly connected with for handle 10.
It is correspondingly provided with Upper shaft sleeve O-ring 61 in the outer wall of the Upper shaft sleeve 3, is correspondingly provided in the outer wall of the Lower shaft sleeve 4
Lower shaft sleeve O-ring 62.The close of 4 outer wall of Upper shaft sleeve 3 and Lower shaft sleeve is increased by Upper shaft sleeve O-ring 61 and Lower shaft sleeve O-ring 62
Degree is closed, guarantees that medium will not escape.
The Upper shaft sleeve O-ring 61 includes the first Upper shaft sleeve O-ring 611 being arranged between Upper shaft sleeve 3 and butterfly valve ontology 7
And the second Upper shaft sleeve O-ring 612 being arranged between Upper shaft sleeve 3 and butterfly valve plate 8；Axis on first Upper shaft sleeve O-ring 611 and second
Set O-ring ensure that the leakproofness between Upper shaft sleeve and butterfly valve ontology and butterfly valve plate respectively.
The Lower shaft sleeve O-ring 62 includes the first Lower shaft sleeve O-ring being arranged between Lower shaft sleeve 4 and butterfly valve ontology 7
621 and the second Lower shaft sleeve O-ring 622 for being arranged between Lower shaft sleeve 4 and butterfly valve ontology 7.First Lower shaft sleeve O-ring 621 and
Two Lower shaft sleeve O-rings 622 ensure that leakproofness between Lower shaft sleeve and butterfly valve ontology and butterfly valve ontology 7 respectively.
The present patent application passes through the upper valve rod O-ring, lower valve rod O-ring, Upper shaft sleeve O-ring, first that are arranged in butterfly valve
Upper shaft sleeve O-ring, the second Upper shaft sleeve O-ring, Lower shaft sleeve O-ring, the first Lower shaft sleeve O-ring, the second Lower shaft sleeve O-ring composition are close
Seal structure, when can effectively guarantee that medium passes through or is truncated inside the butterfly valve of the application, medium will not be revealed completely and will not
Contacting with intermediate valve rod (generally metalwork) leads to corrosion and damage；And this can effectively be promoted using technical scheme
The anti-seepage effect of application.
The test of shell internal pressure-resistant has been carried out to a kind of preferable butterfly valve of leakproofness of the application according to GB27726-2011,
At room temperature, the case where test hydraulic pressure is respectively 3.4Mpa, 1.55Mpa, 1.15Mpa, test period are -1 hour 15 seconds, test knot
Fruit shows that when valves half open, valve are closed dielectric leakage will not all occur for the preferable butterfly valve of the leakproofness of the application.
Although having done more detailed elaboration to technical solution of the present invention and having enumerated, it should be understood that for ability
For field technique personnel, modifications to the embodiments described above may be made or uses equivalent alternative solution, this is to those skilled in the art
It is it is clear that these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the present invention for member
Claimed range.
Claims (6)
1. a kind of preferable butterfly valve of leakproofness, including butterfly valve ontology (7) are equipped with inside it in the butterfly valve ontology (7)
Valve rod (1), one end and the handle (10) of the valve rod (1) be correspondingly connected with, the other end of the valve rod (1) and butterfly valve plate (8)
It is correspondingly connected with, inside of butterfly valve plate (8) setting in butterfly valve ontology (7), it is characterised in that: the outer wall in the valve rod (1)
Corresponding to be socketed with Upper shaft sleeve (3) and Lower shaft sleeve (4), Upper shaft sleeve (3) setting connects on the top of valve rod (1) and butterfly valve plate (8)
Place is met, the Lower shaft sleeve (4) is arranged in the lower part junction of valve rod (1) and butterfly valve plate (8), in the butterfly valve ontology (7) and butterfly
Gap location between valve plate (8) is correspondingly provided with seal washer (9), the upper end of the seal washer (9) and the outer wall of Upper shaft sleeve (3)
It is correspondingly connected with, the lower end of the seal washer (9) and the outer wall of Lower shaft sleeve (4) are correspondingly connected with.
2. the preferable butterfly valve of a kind of leakproofness according to claim 1, it is characterised in that: in the Upper shaft sleeve (3) and valve
The junction of bar (1) is correspondingly provided with upper valve rod O-ring (21), is correspondingly provided in the Lower shaft sleeve (4) and the junction of valve rod (1)
Lower valve rod O-ring (22).
3. the preferable butterfly valve of a kind of leakproofness according to claim 1, it is characterised in that: the outer wall in the valve rod (1)
It is also corresponding to be socketed with top axle sleeve (5), it is correspondingly connected at the top of the lower part and Upper shaft sleeve (3) of the top axle sleeve (5), the top
The top of portion's axle sleeve (5) is correspondingly connected with handle (10).
4. the preferable butterfly valve of a kind of leakproofness according to claim 1, it is characterised in that: in the outer of the Upper shaft sleeve (3)
Wall is correspondingly provided with Upper shaft sleeve O-ring (61), is correspondingly provided with Lower shaft sleeve O-ring (62) in the outer wall of the Lower shaft sleeve (4).
5. the preferable butterfly valve of a kind of leakproofness according to claim 4, it is characterised in that: the Upper shaft sleeve O-ring (61)
Including the first Upper shaft sleeve O-ring (611) between Upper shaft sleeve (3) and butterfly valve ontology (7) is set and be arranged in Upper shaft sleeve (3) and
The second Upper shaft sleeve O-ring (612) between butterfly valve plate (8)；
The Lower shaft sleeve O-ring (62) includes that first Lower shaft sleeve of the setting between Lower shaft sleeve (4) and butterfly valve ontology (7) is O-shaped
The the second Lower shaft sleeve O-ring (622) for enclosing (621) and being arranged between Lower shaft sleeve (4) and butterfly valve ontology (7).
6. the preferable butterfly valve of a kind of leakproofness according to claim 1, it is characterised in that: the handle (10) and valve rod
(1) pass through fixed screw (11) corresponding releasable connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532129.XA CN110131424A (en) | 2019-06-19 | 2019-06-19 | A kind of preferable butterfly valve of leakproofness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532129.XA CN110131424A (en) | 2019-06-19 | 2019-06-19 | A kind of preferable butterfly valve of leakproofness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110131424A true CN110131424A (en) | 2019-08-16 |
Family
ID=67577939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910532129.XA Pending CN110131424A (en) | 2019-06-19 | 2019-06-19 | A kind of preferable butterfly valve of leakproofness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110131424A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483694A (en) * | 2022-01-28 | 2022-05-13 | 徐州徐工矿业机械有限公司 | Integrated butterfly valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH053744U (en) * | 1991-07-03 | 1993-01-22 | 株式会社クボタ | Butterfly valve seal structure |
| CN2816515Y (en) * | 2005-08-18 | 2006-09-13 | 姜堰市通达船用阀泵有限公司 | Butterfly valve |
| US20120168659A1 (en) * | 2009-09-07 | 2012-07-05 | Yoshito Ozaki | Butterfly valve |
| CN202901322U (en) * | 2012-11-14 | 2013-04-24 | 宣达实业集团浙江东信特氟隆阀门有限公司 | Lining plastic butterfly valve |
| CN204592322U (en) * | 2014-12-17 | 2015-08-26 | 石特阀门股份有限公司 | A kind of copper blast furnace off-gas dedusting butterfly valve |
| WO2018016538A1 (en) * | 2016-07-20 | 2018-01-25 | 旭有機材株式会社 | Butterfly valve |
| CN210135248U (en) * | 2019-06-19 | 2020-03-10 | 厦门科恒塑胶有限公司 | Better butterfly valve of leakproofness |
-
2019
- 2019-06-19 CN CN201910532129.XA patent/CN110131424A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH053744U (en) * | 1991-07-03 | 1993-01-22 | 株式会社クボタ | Butterfly valve seal structure |
| CN2816515Y (en) * | 2005-08-18 | 2006-09-13 | 姜堰市通达船用阀泵有限公司 | Butterfly valve |
| US20120168659A1 (en) * | 2009-09-07 | 2012-07-05 | Yoshito Ozaki | Butterfly valve |
| CN202901322U (en) * | 2012-11-14 | 2013-04-24 | 宣达实业集团浙江东信特氟隆阀门有限公司 | Lining plastic butterfly valve |
| CN204592322U (en) * | 2014-12-17 | 2015-08-26 | 石特阀门股份有限公司 | A kind of copper blast furnace off-gas dedusting butterfly valve |
| WO2018016538A1 (en) * | 2016-07-20 | 2018-01-25 | 旭有機材株式会社 | Butterfly valve |
| CN210135248U (en) * | 2019-06-19 | 2020-03-10 | 厦门科恒塑胶有限公司 | Better butterfly valve of leakproofness |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483694A (en) * | 2022-01-28 | 2022-05-13 | 徐州徐工矿业机械有限公司 | Integrated butterfly valve |
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