CN110529611A - A kind of High Pressure Difference butterfly valve structure - Google Patents
A kind of High Pressure Difference butterfly valve structure Download PDFInfo
- Publication number
- CN110529611A CN110529611A CN201910810905.8A CN201910810905A CN110529611A CN 110529611 A CN110529611 A CN 110529611A CN 201910810905 A CN201910810905 A CN 201910810905A CN 110529611 A CN110529611 A CN 110529611A
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- China
- Prior art keywords
- valve
- butterfly
- fixed
- plate
- screw
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
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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
- F16K1/16—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
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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
-
- 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
- F16K1/48—Attaching valve members to screw-spindles
- F16K1/482—Attaching valve members to screw-spindles with a collar on the spindle or a groove in the spindle, by which a fixing element is supported, the spindle reaching into the valve member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of High Pressure Difference butterfly valve structures, belong to valve technology field, including valve rod, fixed device and valve body, the valve stem tip interference is connected with fixed device, and the fixed the bottom of the device is fixedly connected with fixed plate, and the fixed plate bottom end is threaded with fixed frame, butterfly plate is installed on the inside of the valve body, keyway is offered on the inside of the butterfly plate and keyway number is two, and interference is connected with key A on the inside of the butterfly plate, and the key A outside screw is connected with screw B.The present invention is practical, valve rod rotation abrasion is reduced by fixed device, it avoids butterfly plate that dislocation occurs and generates gap, by adjusting stop screw, and then limited block is limited, when medium has pressure effect to butterfly plate, the surface pressure in sealing contact of valve will not excessively increase, so that butterfly valve seal circle be avoided to reach a standard or contraction distortion, guarantee that butterfly valve seal circle and valve base chamber contact pressure are stablized, the service life of valve sealing face is extended, there is good use value.
Description
Technical field
The present invention relates to valve technology field more particularly to a kind of High Pressure Difference butterfly valve structures.
Background technique
High pressure butterfly valve is a kind of component for realizing pipe-line system on-off and flow control, have been widely used petroleum,
In many fields such as chemical industry, metallurgy, water power, corresponding different demands, high pressure butterfly valve can be close according to structure type, sealing surface material
Envelope form, the various ways such as operating temperature are classified, and in known butterfly valve technology, seal form mostly uses sealing to tie
Structure adapts to high temperature resistant, high pressure and the industries such as corrosion-resistant, wear-resistant due to the limitation of structure feature.
Existing three-eccentric-butterfly-valve valve rod is without adjustable limit structure, this structure, for High Pressure Difference or large-diameter butterfly valve,
Due between common valve rod and executing agency using key connection or gear drive, there is certain gap between connector,
For High Pressure Difference or large-diameter butterfly valve, this allows for medium and is easy to push butterfly plate rotation, make the pressure mistake of valve seal contact surface
Greatly, there is sealed ring deformation, butterfly plate reaches a standard, the problem of opening difficulty or fail to open valve, it is easy to cause the damage of sealing surface,
Notably valve can not be normally-open, reduces the service life of valve, and valve rod rotates for a long time, is easily damaged between abrasion generation
Gap causes butterfly valve compactness to decline.
Summary of the invention
The present invention provides a kind of High Pressure Difference butterfly valve structure, reduces valve rod rotation abrasion by fixed device, butterfly plate is avoided to send out
Raw dislocation generates gap, since butterfly valve valve rod uses adjustable limit structure, after valve is closed, adjusts adjustable limit spiral shell
Nail, and then limited block is limited, when medium has pressure effect to butterfly plate, the surface pressure in sealing contact of valve will not be excessive
Increase, so that butterfly valve seal circle be avoided to reach a standard or contraction distortion, guarantees that butterfly valve seal circle and valve base chamber contact pressure are stablized, so that
High Pressure Difference or large bore valves are easy to open, and extend the service life of valve sealing face, reduce because of failsafe valve bring
Economic loss can effectively solve the problems in background technique.
Specific technical solution provided by the invention is as follows:
A kind of High Pressure Difference butterfly valve structure provided by the invention, including valve rod, fixed device and valve body, the valve stem tip interference connect
It is connected to fixed device, the fixed the bottom of the device is fixedly connected with fixed plate, and the fixed plate bottom end is threaded with fixed frame,
Butterfly plate is installed on the inside of the valve body, keyway is offered on the inside of the butterfly plate and keyway number is two, mistake on the inside of the butterfly plate
It is full of and is connected with key A, the key A outside screw is connected with screw B, and the valve body bottom end is welded with bottom plate, and the bottom plate inside is solid
Surely it is connected with positioning bearing, is rotatably connected to valve rod on the inside of the positioning bearing.
Optionally, it is welded with limited block on the inside of the fixed plate, the limited block inside thread is connected with screw A.
Optionally, interference is connected with key B on the inside of the keyway, and the key B right end is threaded with screw C.
Optionally, interference is connected with outer ring on the inside of the fixed device, is fixedly connected with ball on the inside of the outer ring, described
Inner ring is installed, the fixed device right side opening is equipped with fixing groove and fixing groove number is two on the outside of ball.
Optionally, stop screw is installed on the inside of the fixed plate.
Beneficial effects of the present invention are as follows:
1, the present invention is practical, and easy to operate and using effect is good, positioning bearing outside is fixed by bottom plate, then by fixed
Position bearing is attached valve rod bottom end, avoids being made butterfly plate unbalance stress using valve rod locating bias after abrasion, being improved butterfly valve
Service life.
2, the present invention is defined valve rod by limited block, and an adjustable limit screw limit is equipped on bracket,
Valve rod rotation drives limited block to rotate together, and after valve is closed, adjusting stop screw contacts stop screw with limited block, into
And avoid because pressure medium is excessive so that valve rod closed position continued position close, cause sealing ring to occur reaching a standard and shrink
The problem of deformation.
3, the present invention opens up keyway for openning shape, facilitates the processing of keyway and the control to precision, while using screw B
Key A and key B are fixed with screw C, prevents butterfly plate from connecting with valve rod and loosens, improve the compressive property of butterfly valve.
4, the present invention is fixed valve rod by fixed device, fixture nut A pass through again fixing groove to fixation device into
Row is fixed, and is then reduced valve rod pivoting friction by ball, is reduced the abrasion of valve rod, is avoided butterfly plate that dislocation occurs and is generated gap,
Improve the closing property of butterfly valve.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of overall structure diagram of High Pressure Difference butterfly valve structure of the embodiment of the present invention；
Fig. 2 is the enlarged drawing at a kind of limited block of High Pressure Difference butterfly valve structure of the embodiment of the present invention；
Fig. 3 is a kind of butterfly plate of High Pressure Difference butterfly valve structure of the embodiment of the present invention and the enlarged drawing of valve rod retainingf key；
Fig. 4 is a kind of fixture structure schematic diagram of High Pressure Difference butterfly valve structure of the embodiment of the present invention；
In figure: 1, valve rod；2, fixed device；201, outer ring；202, ball；203, fixing groove；204, inner ring；3, fixture nut A；
4, limited block；5, screw A；6, fixed plate；7, butterfly plate；8, valve body；9, bearing is positioned；10, bottom plate；11, stop screw；12, solid
Determine frame；13, screw B；14, key A；15, key B；16, screw C；17, keyway.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
It is described in detail below in conjunction with a kind of High Pressure Difference butterfly valve structure of Fig. 1 ~ Fig. 4 to the embodiment of the present invention.
As shown in Figs 1-4, a kind of High Pressure Difference butterfly valve structure, including valve rod 1, fixed device 2 and valve body 8, the valve rod 1 push up
End interference is connected with fixed device 2, and fixed 2 bottom end of device is fixedly connected with fixed plate 6, the 6 bottom end screw thread of fixed plate
It is connected with fixed frame 12, butterfly plate 7 is installed on the inside of the butterfly plate 7, keyway 17 and 17 number of keyway are offered on the inside of the valve body 8
It is two, the 7 inside interference of butterfly plate is connected with key A14, and the key A14 outside screw is connected with screw B13, the valve body 8
Bottom end is welded with bottom plate 10, and positioning bearing 9 is fixedly connected on the inside of the bottom plate 10, is rotatablely connected on the inside of the positioning bearing 9
There is valve rod 1.
In the present embodiment as shown in Figure 1, by being fixed on the outside of 10 pairs of positioning bearings 9 of bottom plate, then pass through positioning bearing 9
1 bottom end of valve rod is attached, avoids making 7 unbalance stress of butterfly plate using 1 locating bias of valve rod after abrasion, improving making for butterfly valve
Use the service life.
Wherein, it is welded with limited block 4 on the inside of the fixed plate, 4 inside thread of limited block is connected with screw A5.
As shown in Fig. 2, being defined by limited block 4 to valve rod 1 in the present embodiment, one is equipped on bracket and is adjusted
Stop screw 5 limits, and the rotation of valve rod 1 drives limited block 4 to rotate together, and after valve is closed, adjusting stop screw 11 makes to limit
Screw 11 is contacted with limited block 4, so avoid because pressure medium is excessive so that valve rod 1 closed position continued position close,
Sealing ring is caused to occur reaching a standard and the problem of contraction distortion.
Wherein, the 17 inside interference of keyway is connected with key B15, and the key B15 right end is threaded with screw C16.
As shown in figure 3, opening up keyway 17 for openning shape in the present embodiment, facilitate the processing of keyway 17 and the control to precision
System, while key A14 and key B15 are fixed using screw B13 and screw C16, prevent butterfly plate 7 from connecting appearance pine with valve rod 1
It is dynamic, improve the compressive property of butterfly valve.
Wherein, the 2 inside interference of fixed device is connected with outer ring 201, is fixedly connected with ball on the inside of the outer ring 201
202, inner ring 204 is installed, fixed 2 right side opening of device is equipped with fixing groove 203 and fixing groove 203 on the outside of the ball 202
Number is two.
As shown in figure 4, valve rod 1 is fixed by fixed device 2, fixture nut A3 passes through fixation again in the present embodiment
203 pairs of slot fixed devices 2 are fixed, and then reduce 1 pivoting friction of valve rod by ball 202, reduce the abrasion of valve rod 1, keep away
Exempt from butterfly plate 7 and dislocation generation gap occurs, improves the closing property of butterfly valve.
It should be noted that the present invention is a kind of High Pressure Difference butterfly valve structure, when work, when butterfly valve is in High Pressure Difference operating condition
Under, after valve is closed, stop screw 11 is adjusted, contacts stop screw 11 with limited block 4, prevents pressure medium from pushing butterfly plate 7
Rotation cause butterfly valve butterfly plate 7 reach a standard or sealing ring excess shrinkage deformation, the contact pressure of high-pressure differential valve is reduced with this, is made
Pressure value at valve sealing face maintains normal range (NR), effectively reduces valve opening torque, and keyway 17 uses hatch frame,
Facilitate the processing of keyway 17 and the control to precision, and process keyway 17 using with miller skill, can avoid valve rod 1 and butterfly plate 7 it
Between connection there are gap, prevent butterfly plate 7 under High Pressure Difference effect, loosening connect with valve rod, leads to the mistake under High Pressure Difference of butterfly plate 7
Pass or sealing ring contraction distortion, so that valve torque increases suddenly, while using screw B13 and screw C16 to key A14 and key
B15 is fixed, and prevents butterfly plate 7 from connecting with valve rod 1 and loosens, improves the compressive property of butterfly valve, is positioned by 10 tos to of bottom plate
It is fixed on the outside of bearing 9, then 1 bottom end of valve rod is attached by positioning bearing 9, avoids positioning using valve rod 1 after abrasion
Offset, makes 7 unbalance stress of butterfly plate, improves the service life of butterfly valve, be defined by limited block 4 to valve rod 1, set on bracket
There is an adjustable limit screw 11 to limit, the rotation of valve rod 1 drives limited block 4 to rotate together, and after valve is closed, adjusts limit
Screw 11 contacts stop screw 11 with limited block 4, so avoid because pressure medium is excessive so that valve rod 1 closed position after
Continued position closing, and caused sealing ring to occur reaching a standard and the problem of contraction distortion, then valve rod 1 was fixed by fixed device 2,
Fixture nut A3 passes through 203 pairs of fixing groove fixed devices 2 again and is fixed, and then reduces the rotation of valve rod 1 by ball 202 and rubs
It wipes, reduces the abrasion of valve rod 1, avoid butterfly plate 7 that dislocation occurs and generate gap, the closing property of butterfly valve is improved, to reach better work
Make effect.
Valve rod 1 of the invention；Fixed device 2；Outer ring 201；Ball 202；Fixing groove 203；Inner ring 204；Fixture nut A3；
Limited block 4；Screw A5；Fixed plate 6；Butterfly plate 7；Valve body 8；Position bearing 9；Bottom plate 10；Stop screw 11；Fixed frame 12；Screw
B13；Key A14；Key B15；Screw C16；17 component of keyway is universal standard part or component as known to those skilled in the art,
Structure and principle are all that this technology personnel can be learnt by technical manual or be known by routine experiment method.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (5)
1. a kind of High Pressure Difference butterfly valve structure, including valve rod (1), fixed device (2) and valve body (8), which is characterized in that the valve rod
(1) top interference is connected with fixed device (2), and fixed device (2) bottom end is fixedly connected with fixed plate (6), the fixation
Plate (6) bottom end is threaded with fixed frame (12), is equipped with butterfly plate (7) on the inside of the valve body (8), is opened on the inside of the butterfly plate (7)
Equipped with keyway (17) and keyway (17) number is two, and interference is connected with key A(14 on the inside of the butterfly plate (7)), the key A(14)
Outside screw is connected with screw B(13), valve body (8) bottom end is welded with bottom plate (10), fixed on the inside of the bottom plate (10) to connect
It is connected to positioning bearing (9), is rotatably connected to valve rod (1) on the inside of the positioning bearing (9).
2. a kind of High Pressure Difference butterfly valve structure according to claim 1, which is characterized in that welding on the inside of the fixed plate (6)
Have limited block (4), limited block (4) inside thread is connected with screw A(5).
3. a kind of High Pressure Difference butterfly valve structure according to claim 1, which is characterized in that interference connects on the inside of the keyway (17)
It is connected to key B(15), the key B(15) right end is threaded with screw C(16).
4. a kind of High Pressure Difference butterfly valve structure according to claim 1, which is characterized in that mistake on the inside of the fixed device (2)
It is full of and is connected with outer ring (201), is fixedly connected with ball (202) on the inside of the outer ring (201), installation on the outside of the ball (202)
Have inner ring (204), fixed device (2) right side opening is equipped with fixing groove (203) and fixing groove (203) number is two.
5. a kind of High Pressure Difference butterfly valve structure according to claim 1, which is characterized in that installation on the inside of the fixed plate (6)
There are stop screw (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910810905.8A CN110529611A (en) | 2019-08-30 | 2019-08-30 | A kind of High Pressure Difference butterfly valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910810905.8A CN110529611A (en) | 2019-08-30 | 2019-08-30 | A kind of High Pressure Difference butterfly valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529611A true CN110529611A (en) | 2019-12-03 |
Family
ID=68665334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910810905.8A Pending CN110529611A (en) | 2019-08-30 | 2019-08-30 | A kind of High Pressure Difference butterfly valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110529611A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07260010A (en) * | 1994-03-22 | 1995-10-13 | Tomoe Gijutsu Kenkyusho:Kk | Extensible and contractible apparatus of rotary valve |
| KR20080104105A (en) * | 2008-11-10 | 2008-12-01 | 한일밸브(주) | Butterfly valve |
| CN202301993U (en) * | 2011-10-18 | 2012-07-04 | 天津国际机械有限公司 | Valve rod positioning structure for butt clamping of pin-free butterfly valve |
| CN202927079U (en) * | 2012-10-19 | 2013-05-08 | 株洲市荣达铁路机电有限公司 | Butterfly valve for harmonious locomotive |
| CN203906829U (en) * | 2014-06-24 | 2014-10-29 | 浙江顺源阀门有限公司 | Waterway butterfly valve |
| CN205260862U (en) * | 2015-12-18 | 2016-05-25 | 江苏神通阀门股份有限公司 | Bidirectional sealing butterfly valve |
| CN205446790U (en) * | 2015-12-29 | 2016-08-10 | 安徽红星阀门有限公司 | A gland for ball valve |
| CN206668991U (en) * | 2017-03-15 | 2017-11-24 | 天津瑞蝶恒昌阀门有限公司 | A kind of soft seat butterfly valve of novel sealing structure |
| CN206830831U (en) * | 2017-05-24 | 2018-01-02 | 浙江宝丰阀门有限公司 | One kind cleaning butterfly valve |
| CN208619691U (en) * | 2018-08-17 | 2019-03-19 | 天津市建塘阀门有限公司 | A kind of flange butterfly |
-
2019
- 2019-08-30 CN CN201910810905.8A patent/CN110529611A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07260010A (en) * | 1994-03-22 | 1995-10-13 | Tomoe Gijutsu Kenkyusho:Kk | Extensible and contractible apparatus of rotary valve |
| KR20080104105A (en) * | 2008-11-10 | 2008-12-01 | 한일밸브(주) | Butterfly valve |
| CN202301993U (en) * | 2011-10-18 | 2012-07-04 | 天津国际机械有限公司 | Valve rod positioning structure for butt clamping of pin-free butterfly valve |
| CN202927079U (en) * | 2012-10-19 | 2013-05-08 | 株洲市荣达铁路机电有限公司 | Butterfly valve for harmonious locomotive |
| CN203906829U (en) * | 2014-06-24 | 2014-10-29 | 浙江顺源阀门有限公司 | Waterway butterfly valve |
| CN205260862U (en) * | 2015-12-18 | 2016-05-25 | 江苏神通阀门股份有限公司 | Bidirectional sealing butterfly valve |
| CN205446790U (en) * | 2015-12-29 | 2016-08-10 | 安徽红星阀门有限公司 | A gland for ball valve |
| CN206668991U (en) * | 2017-03-15 | 2017-11-24 | 天津瑞蝶恒昌阀门有限公司 | A kind of soft seat butterfly valve of novel sealing structure |
| CN206830831U (en) * | 2017-05-24 | 2018-01-02 | 浙江宝丰阀门有限公司 | One kind cleaning butterfly valve |
| CN208619691U (en) * | 2018-08-17 | 2019-03-19 | 天津市建塘阀门有限公司 | A kind of flange butterfly |
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| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191203 |
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| RJ01 | Rejection of invention patent application after publication |