CN110081189A - A kind of two-way three-eccentric-butterfly-valve - Google Patents
A kind of two-way three-eccentric-butterfly-valve Download PDFInfo
- Publication number
- CN110081189A CN110081189A CN201910403890.3A CN201910403890A CN110081189A CN 110081189 A CN110081189 A CN 110081189A CN 201910403890 A CN201910403890 A CN 201910403890A CN 110081189 A CN110081189 A CN 110081189A
- Authority
- CN
- China
- Prior art keywords
- valve
- air inlet
- entrance sleeve
- plate
- butterfly
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005728 strengthening Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation 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
- 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
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of two-way three-eccentric-butterfly-valves, including valve body and valve seat；Left entrance sleeve and right entrance sleeve is respectively set in the two sides of the valve seat, and left entrance sleeve and right entrance sleeve are connected to upper left air inlet and upper right air inlet respectively；The valve body top is provided with control cabinet, and setting section is fan-shaped cavity in the control cabinet, pressuring plate is arranged in cavity, described pressuring plate one end is fixedly connected with valve rod, and cavity is separated into the booster cavity of side and the pressure-releasing chamber of the other side by pressuring plate.The present invention utilizes the pressure of medium, active force is generated to pressuring plate, pressuring plate generates torque to valve rod, to be applied with additional active force to valve plate, the seal pressure between sealing surface of valve plate and sealing surface of seat is increased, sealing effect is improved, similarly there is supercharging effect in reversed access, the effect of biaxial strengthening sealing is realized, solving the problems, such as current three-eccentric-butterfly-valve only has one-way sealing good.
Description
Technical field
The present invention relates to a kind of valve, specifically a kind of two-way three-eccentric-butterfly-valve.
Background technique
Three-eccentric-butterfly-valve can be applicable to the industries such as petroleum, chemical industry, electric power.It has the metallic hard there are three geometric eccentricity structure
Sealed butterfly valve is sealed using torque, is applied to bad working environments.
Existing three-eccentric-butterfly-valve only has the characteristics that one-way sealing is good, i.e., if medium enters butterfly valve from the import of valve
Inner cavity has preferable leakproofness when the valve is closed, if but medium when entering butterfly valve inner cavity from the outlet side of valve, the valve
It will be unable to keep good leakproofness.
Summary of the invention
The purpose of the present invention is to provide a kind of two-way three-eccentric-butterfly-valves, to solve mentioned above in the background art ask
Topic.
To achieve the above object, the invention provides the following technical scheme:
A kind of two-way three-eccentric-butterfly-valve, including valve body and valve seat, the valve body is interior to be arranged valve plate, and the valve plate is fixed on valve rod
On, valve body is fixedly connected with valve seat；Left entrance sleeve and right entrance sleeve, left entrance sleeve is respectively set in the two sides of the valve seat
Be respectively communicated with right entrance sleeve in the two sides of valve plate in valve body, left entrance sleeve and right entrance sleeve respectively with upper left air inlet
It is connected to upper right air inlet；The valve body top is provided with control cabinet, and setting section is fan-shaped cavity in the control cabinet, empty
Intracavitary setting pressuring plate, described pressuring plate one end are fixedly connected with valve rod, pressuring plate by cavity be separated into side booster cavity and
The pressure-releasing chamber of the other side, the booster cavity can be connected to upper left air inlet and upper right air inlet respectively, the pressure-releasing chamber and exhaust
Hole connection.
As a further solution of the present invention: moveable non-return flap, the non-return flap position is arranged in the control upper box part
In the connectivity part of booster cavity and upper left air inlet and upper right air inlet.
As a further solution of the present invention: the gas vent connects discharge chamber, and setting can control shifting in the discharge chamber
Dynamic switching valve, the left and right sides of the discharge chamber are lower-left air inlet and bottom right air inlet, lower-left air inlet and bottom right air inlet
Hole is connected to left entrance sleeve and right entrance sleeve respectively, and the top of discharge chamber is connected to lower-left gas vent and bottom right gas vent,
Lower-left gas vent and bottom right gas vent are connected to left entrance sleeve and right entrance sleeve respectively, and two are arranged on the switching valve and leads to
Hole.
As a further solution of the present invention: setting can be connected to the through-hole of booster cavity and pressure-releasing chamber on the pressuring plate.
As a further solution of the present invention: corresponding to lead to the hole site in the pressuring plate and mobilizable exhaustion plate, row are set
Gas plate one end connection stay cord, and pressure spring is set in the endface of exhaustion plate, one end of the drawstring, which is led to, is fixed on control cabinet
Outer deposits line case.
As a further solution of the present invention: adjusting knob is arranged in described deposit on line case, the adjusting knob and drawstring
One end connection.
As a further solution of the present invention: sealing ring is set on the end face that the pressuring plate is contacted with cavity.
Compared with prior art, the beneficial effects of the present invention are: the present invention utilizes the pressure of medium, work is generated to pressuring plate
Firmly, pressuring plate generates torque to valve rod and increases sealing surface of valve plate and valve seat to be applied with additional active force to valve plate
Seal pressure between sealing surface improves sealing effect, similarly has supercharging effect in reversed access, realizes biaxial strengthening
The effect of sealing, solving the problems, such as current three-eccentric-butterfly-valve only has one-way sealing good.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 be Fig. 1 in E-E to schematic cross-sectional view.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~2, in the embodiment of the present invention, a kind of two-way three-eccentric-butterfly-valve, including valve body 1 and valve seat 4, it is described
Valve plate 3 is set in valve body 1, and the valve plate 3 is fixed on valve rod 2, and valve body 1 is fixedly connected with valve seat 4；The two sides of the valve seat 4
Left entrance sleeve 5 and right entrance sleeve 14 is respectively set, left entrance sleeve 5 and right entrance sleeve 14 are respectively communicated in valve body 1
The two sides of valve plate 3, left entrance sleeve 5 and right entrance sleeve 14 are connected to upper left air inlet 9 and upper right air inlet 11 respectively；It is described
1 top of valve body is provided with control cabinet 6, and setting section is fan-shaped cavity in the control cabinet 6, and pressuring plate 8, institute is arranged in cavity
It states 8 one end of pressuring plate to connect with valve rod 2, sealing ring 7 is set on other end, be tightly connected with the inner wall of cavity, by cavity point
Be divided into the booster cavity 18 of side and the pressure-releasing chamber 19 of the other side, the booster cavity 18 can respectively with upper left air inlet 9 and upper right into
Stomata 11 is connected to, specifically: 6 top of control cabinet is arranged moveable non-return flap 10, the non-return flap 10 be located at booster cavity 18 and
The connectivity part of upper left air inlet 9 and upper right air inlet 11, when the pressure medium in upper left air inlet 9 is greater than in upper right air inlet 11
Pressure medium when, non-return flap 10 moves right, and upper left air inlet 9 is connected to booster cavity 18, otherwise in the upper right air inlet 11
When pressure medium is greater than the pressure medium in upper left air inlet 9, non-return flap 10 is moved to the left, and upper right air inlet 11 is connected to booster cavity
18；The pressure-releasing chamber 19 is connected to gas vent 20, and gas vent 20 connects discharge chamber, and setting can move left and right in the discharge chamber
Switch valve 21, the left and right sides of the discharge chamber is lower-left air inlet 22 and bottom right air inlet 25, lower-left air inlet 22 and bottom right
Air inlet 25 is connected to left entrance sleeve 5 and right entrance sleeve 14 respectively, the top and lower-left gas vent 23 and bottom right of discharge chamber
Gas vent 24 is connected to, and lower-left gas vent 23 and bottom right gas vent 24 are connected to left entrance sleeve 5 and right entrance sleeve 14 respectively, institute
State switching valve 21 on be arranged two through-holes, can respectively it is corresponding with lower-left gas vent 23 and bottom right gas vent 24 be connected to, when the right side into
In mouth adapter tube 14 when ventilation, air pressure is transferred to switching 21 right side of valve by bottom right air inlet 25, and promotion switching valve 21 moves to left, makes
Lower-left gas vent 23 is connected to gas vent 20, and similarly, when left entrance sleeve 5 is ventilated, bottom right gas vent 24 is connected to gas vent 20.
Setting can be connected to the through-hole of booster cavity 18 and pressure-releasing chamber 19 on pressuring plate 8, and lead to the hole site setting is corresponded in pressuring plate 8
Mobilizable exhaustion plate 15,15 one end connection stay cord 12 of exhaustion plate, and pressure spring 16, the drawing are set in the endface of exhaustion plate 15
One end of rope 12, which is led to, is fixed on depositing outside line case 17 outside control cabinet 6, and drawstring 12 is horizontally through valve rod 2, and rotary valve rod 2 is opened
When, valve rod 2 drives drawstring 12 to pull exhaustion plate 15 and opens through-hole.In addition, depositing setting adjusting knob 13, drawstring on line case 17
12 one end is wound on adjusting knob 13, the 13 stretchy exhaustion plate 15 of adjusting knob movement is rotated, to be connected to booster cavity 18
With pressure-releasing chamber 19, it is assumed that the rotation failure of valve rod 2 has the advantages that release manually, thus in the case where valve can not be opened, it can
It allows and generates partial compromise at valve clack sealing surface, to prevent the inlet side superpressure of butterfly valve.
Assuming that medium, by flowing to left side on the right side of valve plate 3, after valve plate 3 is closed, air pressure enters from right entrance sleeve 14 to be pressurized
In chamber 18, while left entrance sleeve 5 being sealed by non-return flap 10, there is pressure in booster cavity 18, work will be generated to pressuring plate 8
Firmly, pressuring plate 8 generates torque to valve rod 2, to be applied with additional active force to valve plate 3, increase 3 sealing surface of valve plate with
Seal pressure between sealing surface of seat improves sealing effect；It is similarly similar, if medium by the left of valve plate 3 flow to right side, equally
So that pressuring plate 8 is generated pressure, to apply additional active force to valve plate 3, realize the effect of biaxial strengthening sealing.It lets out
When pressure, exhaustion plate 15 is opened, is connected to booster cavity 18 with pressure-releasing chamber 19, air pressure can be discharged from booster cavity 18.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (7)
1. a kind of two-way three-eccentric-butterfly-valve, including valve body (1) and valve seat (4), the valve body (1) is interior to be arranged valve plate (3), the valve
Plate (3) is fixed on valve rod (2), and valve body (1) is fixedly connected with valve seat (4)；It is characterized by: the two sides of the valve seat (4) point
Left entrance sleeve (5) and right entrance sleeve (14) are not set, and left entrance sleeve (5) and right entrance sleeve (14) are respectively communicated in valve
The two sides of body (1) interior valve plate (3), left entrance sleeve (5) and right entrance sleeve (14) respectively with upper left air inlet (9) and upper right into
Stomata (11) connection；Valve body (1) top is provided with control cabinet (6), and setting section is fan-shaped sky in the control cabinet (6)
Chamber, cavity is interior to be arranged pressuring plate (8), and described pressuring plate (8) one end is fixedly connected with valve rod (2), and pressuring plate (8) separates cavity
At the booster cavity (18) of side and the pressure-releasing chamber (19) of the other side, the booster cavity (18) and upper left air inlet (9) and upper right into
Stomata (11) connection, the pressure-releasing chamber (19) are connected to gas vent (20).
2. a kind of two-way three-eccentric-butterfly-valve according to claim 1, it is characterised in that: control cabinet (6) the top setting
Moveable non-return flap (10), the non-return flap (10) are located at booster cavity (18) and upper left air inlet (9) and upper right air inlet
(11) connectivity part.
3. a kind of two-way three-eccentric-butterfly-valve according to claim 1, it is characterised in that: gas vent (20) the connection exhaust
Chamber, the switching valve (21) that the interior setting of the discharge chamber can move left and right, the left and right sides of the discharge chamber is lower-left air inlet
(22) and bottom right air inlet (25), lower-left air inlet (22) and bottom right air inlet (25) respectively with left entrance sleeve (5) He Youjin
Mouth adapter tube (14) connection, the top of discharge chamber are connected to lower-left gas vent (23) and bottom right gas vent (24), lower-left gas vent
(23) it is connected to respectively with left entrance sleeve (5) and right entrance sleeve (14) with bottom right gas vent (24), on the switching valve (21)
Two through-holes are set.
4. a kind of two-way three-eccentric-butterfly-valve according to claim 1, it is characterised in that: be arranged on the pressuring plate (8) and connect
The through-hole of logical booster cavity (18) and pressure-releasing chamber (19).
5. a kind of two-way three-eccentric-butterfly-valve according to claim 4, it is characterised in that: corresponding logical in the pressuring plate (8)
The mobilizable exhaustion plate (15) of hole site setting, exhaustion plate (15) one end connection stay cord (12), and in exhaustion plate (15)
Endface be arranged pressure spring (16), one end of the drawstring (12) lead to be fixed on control cabinet (6) outside deposit line case (17).
6. a kind of two-way three-eccentric-butterfly-valve according to claim 5, it is characterised in that: tune is arranged in described deposit on line case (17)
It saves knob (13), the adjusting knob (13) connect with one end of drawstring (12).
7. a kind of two-way three-eccentric-butterfly-valve according to claim 6, it is characterised in that: the pressuring plate (8) connects with cavity
Sealing ring (7) are set on the end face of touching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403890.3A CN110081189B (en) | 2019-05-15 | 2019-05-15 | Bidirectional three-eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403890.3A CN110081189B (en) | 2019-05-15 | 2019-05-15 | Bidirectional three-eccentric butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110081189A true CN110081189A (en) | 2019-08-02 |
| CN110081189B CN110081189B (en) | 2021-01-05 |
Family
ID=67420356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910403890.3A Active CN110081189B (en) | 2019-05-15 | 2019-05-15 | Bidirectional three-eccentric butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110081189B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1216726A (en) * | 1968-10-16 | 1970-12-23 | Whessoe Ltd | Improvements in and relating to means for controlling flow of liquid through a drop pipe into a vessel |
| SU1712718A1 (en) * | 1989-10-31 | 1992-02-15 | Черноморский филиал Центрального научно-исследовательского института технологии судостроения | Device for pipeline shutting off |
| CN2348192Y (en) * | 1998-10-18 | 1999-11-10 | 张重辉 | Charge and discharge valve |
| CN202302000U (en) * | 2011-11-02 | 2012-07-04 | 湖北三通石油机械有限公司 | Sector cylinder pneumatic butterfly valve |
| CN203146981U (en) * | 2013-04-01 | 2013-08-21 | 上海华尔德电站阀门有限公司 | Valve pneumatic device with pressurization function |
| CN104344058A (en) * | 2013-08-02 | 2015-02-11 | 丹尼尔测量和控制公司 | Flow control system and control valve having closure assistance |
| CN104482243A (en) * | 2014-12-21 | 2015-04-01 | 郑子叶 | Frictionless sealing ball valve |
| CN204692595U (en) * | 2015-05-28 | 2015-10-07 | 常州埃姆基冷冻设备有限公司 | Industrial refrigeration right-angle type screw down nonreturn valve |
| CN205715701U (en) * | 2016-04-20 | 2016-11-23 | 邵建农 | Involute butterfly control valve for water pump |
| CN107355547A (en) * | 2017-08-08 | 2017-11-17 | 英诺威阀业有限公司 | It is a kind of from pressurising bidirectional sealed butterfly valve |
| CN207246443U (en) * | 2017-09-19 | 2018-04-17 | 荆门炼化机械有限公司 | A kind of bidirectional sealed butterfly valve |
| CN109458461A (en) * | 2018-12-25 | 2019-03-12 | 博雷（中国）控制系统有限公司 | A kind of three-eccentric-butterfly-valve and pressure adaptive valve control system |
-
2019
- 2019-05-15 CN CN201910403890.3A patent/CN110081189B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1216726A (en) * | 1968-10-16 | 1970-12-23 | Whessoe Ltd | Improvements in and relating to means for controlling flow of liquid through a drop pipe into a vessel |
| SU1712718A1 (en) * | 1989-10-31 | 1992-02-15 | Черноморский филиал Центрального научно-исследовательского института технологии судостроения | Device for pipeline shutting off |
| CN2348192Y (en) * | 1998-10-18 | 1999-11-10 | 张重辉 | Charge and discharge valve |
| CN202302000U (en) * | 2011-11-02 | 2012-07-04 | 湖北三通石油机械有限公司 | Sector cylinder pneumatic butterfly valve |
| CN203146981U (en) * | 2013-04-01 | 2013-08-21 | 上海华尔德电站阀门有限公司 | Valve pneumatic device with pressurization function |
| CN104344058A (en) * | 2013-08-02 | 2015-02-11 | 丹尼尔测量和控制公司 | Flow control system and control valve having closure assistance |
| CN104482243A (en) * | 2014-12-21 | 2015-04-01 | 郑子叶 | Frictionless sealing ball valve |
| CN204692595U (en) * | 2015-05-28 | 2015-10-07 | 常州埃姆基冷冻设备有限公司 | Industrial refrigeration right-angle type screw down nonreturn valve |
| CN205715701U (en) * | 2016-04-20 | 2016-11-23 | 邵建农 | Involute butterfly control valve for water pump |
| CN107355547A (en) * | 2017-08-08 | 2017-11-17 | 英诺威阀业有限公司 | It is a kind of from pressurising bidirectional sealed butterfly valve |
| CN207246443U (en) * | 2017-09-19 | 2018-04-17 | 荆门炼化机械有限公司 | A kind of bidirectional sealed butterfly valve |
| CN109458461A (en) * | 2018-12-25 | 2019-03-12 | 博雷（中国）控制系统有限公司 | A kind of three-eccentric-butterfly-valve and pressure adaptive valve control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110081189B (en) | 2021-01-05 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20201218 Address after: 1-2 / F, workshop 3, 1869 Binhai 1st Road, Wenzhou Economic and Technological Development Zone, 325000, Zhejiang Province Applicant after: Minggong Valve Co.,Ltd. Address before: 325115 Lixi Village, Yantou Town, Yongjia County, Wenzhou City, Zhejiang Province Applicant before: Li Qiong |
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