CN104653791A - Splitting type valve seat self-adjustable sealing three-eccentric butterfly valve - Google Patents
Splitting type valve seat self-adjustable sealing three-eccentric butterfly valve Download PDFInfo
- Publication number
- CN104653791A CN104653791A CN201510071903.3A CN201510071903A CN104653791A CN 104653791 A CN104653791 A CN 104653791A CN 201510071903 A CN201510071903 A CN 201510071903A CN 104653791 A CN104653791 A CN 104653791A
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- China
- Prior art keywords
- valve
- valve seat
- transmission shaft
- ring
- 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.)
- Pending
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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
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
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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
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
-
- 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 relates to a splitting type valve seat self-adjustable sealing three-eccentric butterfly valve. The splitting type valve seat self-adjustable sealing three-eccentric butterfly valve comprises a valve body, a first pressing ring, a valve seat, a sealing ring, a second pressing ring, a second screw, a first screw, a transmission shaft and a valve plate, wherein the inner wall of the valve seat is a wedged inner conical surface; the outer wall of the sealing ring is a wedged outer conical surface; the valve seat is fixed in the valve body by the first pressing ring and the first screw; a gap is formed between the valve seat and the first pressing ring; the transmission shaft is rotationally mounted in the valve body; the valve plate is fixed on the transmission shaft; the sealing ring is fixed on the valve plate by the second pressing ring and the second screw; the outer wall of the sealing ring is matched with the inner wall of the valve seat to form a sealed surface; the axis of the transmission shaft is deviated from the center of the valve plate and the axis of the transmission shaft is deviated from the center of the sealed surface; the axis of the wedged inner conical surface of the valve seat is crossed with the cylindrical axis of the valve body to form an acute angle. The splitting type valve seat self-adjustable sealing three-eccentric butterfly valve has the characteristics of good sealing performance, small needed torque, good wear resistance and long service life and the like; the whole device can be operated safely and stably and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of three eccentric butterfly valve, the present invention especially relates to a kind of split type valve seat self-adjusting seal three eccentric butterfly valve.
Background technique
Three eccentric butterfly valve, owing to adding the angle bias of sealing surface on the basis of double eccentric butterfly valve, is no longer the resiliently deformable relying on valve seat, but relies on the surface of contact pressure of valve seat and seal ring to realize sealing completely.This wedge cone type sealed principle, sealability is superior, and valve seat and the friction of sealing circulation layer, open and close moment less, temperature and pressure using scope is wide, cuts off performance good, structure length short (being only about 1/3 of gate valve), lightweight, low cost of manufacture, is commonly used to replace traditional Wedge gate valve and stop valve.
When three eccentric butterfly valve is applied in coal chemical engineering equipment, medium is generally slurry or contains gas or the liquid of fine particle, valve frequent movement, fine particle in medium is particularly outstanding to the damage of sealing surface, the working life of seal ring and valve seat is shorter, but because three eccentricity principle belongs to face seal construction, in the prior art, the sealing surface of the valve seat on valve plate upper sealing ring and valve body can only singly be joined, and the sealing surface shape being difficult to do the valve seat on the valve plate upper sealing ring of batch and valve body is fitted completely, compressed.Because single-piece manufactures, so cannot change online and keep in repair, cost be higher.
When another three eccentric butterfly valve uses under some deep cooling operating modes, when especially using in Air separation industry, because medium temperature is low, the expanding with heat and contract with cold of seal ring and valve seat own material, seating position is fixing can not obtain corresponding bit shift compensation, causes the generation gap, sealing surface place of seal ring and valve seat, causes valve seal performance failure, valves leakage, affect the degree of regulation of whole device, device even can be caused to stop, and economic loss is serious.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of can change online with safeguard, the position of valve seat can regulate automatically, the split type valve seat self-adjusting seal three eccentric butterfly valve of pressure assisted seal.
According to technological scheme provided by the invention, described split type valve seat self-adjusting seal three eccentric butterfly valve, it comprises valve body, the first trim ring, valve seat, seal ring, the second trim ring, the second screw, the first screw, transmission shaft and valve plate; The inwall of described valve seat is wedge shape internal conical surface, and the outer wall of seal ring is wedge shape outer conical surface; Valve seat is fixed with by the first trim ring and the first screw in valve body, and between valve seat and the first trim ring, there is gap, transmission shaft is rotatablely equipped with in valve body, transmission shaft is fixed with valve plate, valve plate is fixed with seal ring by the second trim ring and the second screw, and the outer wall of seal ring coordinates with the inwall of valve seat and forms sealing surface; And the center of the axis deviation valve plate of transmission shaft, the center of sealing surface described in the axis deviation of transmission shaft, the axis of wedge shape internal conical surface and the cylinder axis of valve body of valve seat are sharp angle.
Described gap is 0.5 ~ 2mm.
The end face of the valve seat towards valve body offers annular groove, in this annular groove, is provided with valve seat pad.
The end face of the valve plate towards seal ring offers annular groove, in this annular groove, is provided with seal ring pad.
The end face of the first trim ring towards valve body offers annular groove, in this annular groove, is provided with trim ring pad.
The present invention has good seal performance, required torque is little, wear resistance good and the feature such as long service life, present invention ensures that whole appliance arrangement can run safely and smoothly, improves manufacturing efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is A-A sectional view of Fig. 1.
Fig. 3 is the enlarged view of part B in Fig. 2.
Fig. 4 is the structural representation of seal ring in the present invention.
Fig. 5 is C-C sectional view of Fig. 4.
Fig. 6 is the structural representation of valve seat in the present invention.
Fig. 7 is D-D sectional view of Fig. 6.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
This split type valve seat self-adjusting seal three eccentric butterfly valve, it comprises valve body 1, first trim ring 2, valve seat 3, seal ring 4, second trim ring 5, second screw 6, first screw 9, transmission shaft 11 and valve plate 12; The inwall of described valve seat 3 is wedge shape internal conical surface, and the outer wall of seal ring 4 is wedge shape outer conical surface; Valve seat 3 is fixed with by the first trim ring 2 and the first screw 9 in valve body 1, and between valve seat 3 and the first trim ring 2, there is gap 13, transmission shaft 11 is rotatablely equipped with in valve body 1, transmission shaft 11 is fixed with valve plate 12, valve plate 12 is fixed with seal ring 4 by the second trim ring 5 and the second screw 6, and the outer wall of seal ring 4 coordinates with the inwall of valve seat 3 and forms sealing surface; And the center of the axis deviation valve plate 12 of transmission shaft 11, the center of sealing surface described in the axis deviation of transmission shaft 11, the axis of the wedge shape internal conical surface of valve seat 3 and the cylinder axis of valve body 1 are sharp angle.
Described gap 13 is 0.5 ~ 2mm.
The end face of the valve seat 3 towards valve body 1 offers annular groove, in this annular groove, is provided with valve seat pad 8.
The end face of the valve plate 12 towards seal ring 4 offers annular groove, in this annular groove, is provided with seal ring pad 7.
The end face of the first trim ring 2 towards valve body 1 offers annular groove, in this annular groove, is provided with trim ring pad 10.
Described valve seat 3 is fixed on valve body 1 by the first trim ring 2 and the first screw 9, and inserted valve seat pad 8 in the annular groove of valve seat 3, forms first with valve body 1 and seal, and prevents from leaking in medium.Seal ring 4 is fixed on valve plate 12 by the second trim ring 5 and the second screw 6, valve plate 12 is arranged in valve body 1, located by transmission shaft 11 centering, the outer wall of seal ring 4 coordinates with the inwall of valve seat 3 and forms sealing surface, embedding sealing ring pad 7 in the annular groove of valve plate 12, form second with seal ring 4 to seal, prevent from leaking in medium.
Final controlling element drives valve plate 12 to rotate by transmission shaft 11, the seal ring 4 that valve plate 12 is provided with away from near valve seat 3, realize the keying of valve.Embed trim ring pad 10 in the annular groove of trim ring 2 and form three seals with valve body 1, prevent medium from leaking outside.Split type valve seat 3 and seal ring 4 are a sealing pair, can realize batch production and spot replace or maintenance.When medium flows into the reverse side of valve plate 12 from the front of valve plate 12, be full of medium in gap 13, the pressure of medium promotes valve seat 3 to the left.
Working principle of the present invention is as follows:
Final controlling element drives valve plate 12 to turn clockwise by transmission shaft 11, thus the seal ring 4 be fixed on valve plate 12 is away from the valve seat 3 be fixed on valve body 1, namely achieves the unlatching of valve.Otherwise final controlling element drives valve plate 12 to be rotated counterclockwise by transmission shaft 11, thus the seal ring 4 be fixed on valve plate 12 is near also pasting the valve seat 3 firmly fixed on valve body 1, namely achieves the closedown of valve.
Valve seat 3 and seal ring 4, be all split type can the metallic packing ring of dismounting and change and maintenance online.When valve closing, medium flows into the reverse side of valve plate 12 during from valve plate 12 front, medium is full of in gap 13, the pressure of medium promotes valve seat 3 and moves to the left, the matching gap 14 that the automatic adjustment effective compensation of valve seat 3 position produces the wearing and tearing of sealing surface because of Material shrinkage or Long-Time Service media particle because of deep cooling operating mode lower sealing ring 4 and valve seat 3, realize pressure assisted seal, guarantee the sealability of valve.
In the present invention, valve seat 3 is fixed on valve body 1 by the first trim ring 2 by the first screw 9, by means of the pressure of medium, can the position of automatic regulating valve seat 3, effective compensation metallic packing ring 4 and valve seat 3 sealing surface place, due to the gap processed or material produces because of low-temperature shrink, guarantee the sealability of valve.
In the present invention, valve seat 3 and seal ring 4 are metal ring, can pile-up welding hard alloy at sealing surface place, improve the surface hardness of sealing surface, effectively prevent the particle in medium to the damage of sealing surface, reduce wearing and tearing, extend the working life of valve.
In the present invention, valve seat 3 and valve body 1 are split-type structural, and seal ring 4 and valve plate 12 are split-type structural, if sealing surface damage or when needing to be replaced with more wear-resisting, corrosion resistant material, need not dismantle valve plate 12 and valve body 1, seal ring 4 and valve seat 3 can carry out on-line maintenance, reduce user cost.
Claims (5)
1. a split type valve seat self-adjusting seal three eccentric butterfly valve, it comprises valve body (1), the first trim ring (2), valve seat (3), seal ring (4), the second trim ring (5), the second screw (6), the first screw (9), transmission shaft (11) and valve plate (12); It is characterized in that: the inwall of described valve seat (3) is wedge shape internal conical surface, the outer wall of seal ring (4) is wedge shape outer conical surface; Valve seat (3) is fixed with by the first trim ring (2) and the first screw (9) in valve body (1), and between valve seat (3) and the first trim ring (2), there is gap (13), transmission shaft (11) is rotatablely equipped with in valve body (1), transmission shaft (11) is fixed with valve plate (12), valve plate (12) is fixed with seal ring (4) by the second trim ring (5) and the second screw (6), and the outer wall of seal ring (4) coordinates with the inwall of valve seat (3) and forms sealing surface; And the center of the axis deviation valve plate (12) of transmission shaft (11), the center of sealing surface described in the axis deviation of transmission shaft (11), the axis of the wedge shape internal conical surface of valve seat (3) and the cylinder axis of valve body (1) they are sharp angle.
2. split type valve seat self-adjusting seal three eccentric butterfly valve as claimed in claim 1, is characterized in that: described gap (13) are 0.5 ~ 2mm.
3. split type valve seat self-adjusting seal three eccentric butterfly valve as claimed in claim 1, is characterized in that: on the end face of the valve seat (3) towards valve body (1), offer annular groove, be provided with valve seat pad (8) in this annular groove.
4. split type valve seat self-adjusting seal three eccentric butterfly valve as claimed in claim 1, is characterized in that: on the end face of the valve plate (12) towards seal ring (4), offer annular groove, be provided with seal ring pad (7) in this annular groove.
5. split type valve seat self-adjusting seal three eccentric butterfly valve as claimed in claim 1, is characterized in that: on the end face of the first trim ring (2) towards valve body (1), offer annular groove, be provided with trim ring pad (10) in this annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510071903.3A CN104653791A (en) | 2015-02-10 | 2015-02-10 | Splitting type valve seat self-adjustable sealing three-eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510071903.3A CN104653791A (en) | 2015-02-10 | 2015-02-10 | Splitting type valve seat self-adjustable sealing three-eccentric butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104653791A true CN104653791A (en) | 2015-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510071903.3A Pending CN104653791A (en) | 2015-02-10 | 2015-02-10 | Splitting type valve seat self-adjustable sealing three-eccentric butterfly valve |
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| CN (1) | CN104653791A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240539A (en) * | 2015-10-12 | 2016-01-13 | 罗普阀业（宜兴）有限公司 | High platform all-metal hard sealing butterfly valve |
| CN106051178A (en) * | 2016-07-05 | 2016-10-26 | 英诺威阀业有限公司 | High-performance butterfly valve capable of ensuring double seal |
| CN107606304A (en) * | 2017-09-30 | 2018-01-19 | 和县科嘉阀门铸造有限公司 | A kind of durable valve block |
| CN108167457A (en) * | 2018-02-12 | 2018-06-15 | 无锡智能自控工程股份有限公司 | Three eccentricity sealed butterfly valve trim ring screw check structure |
| CN108916397A (en) * | 2018-09-06 | 2018-11-30 | 温州上沃阀门科技有限公司 | The valve plate of eccentric hard sealed flygate seals installing mechanism |
| CN110375077A (en) * | 2019-07-23 | 2019-10-25 | 四川苏克流体控制设备有限公司 | A kind of forced seal ultralow temperature butterfly valve |
| CN111684184A (en) * | 2017-09-28 | 2020-09-18 | 艾默生自动化解决方案最终控制美国有限合伙公司 | In situ gasket assembly |
| CN113767054A (en) * | 2019-04-25 | 2021-12-07 | 申克普若赛斯欧洲有限公司 | Adjustable top plate of dome valve |
| CN114413005A (en) * | 2022-01-22 | 2022-04-29 | 开维喜阀门集团有限公司 | Double-eccentric butterfly valve and manufacturing method of valve body sealing ring thereof |
| CN114526341A (en) * | 2022-01-21 | 2022-05-24 | 中鸿阀门股份有限公司 | Double-sealing auxiliary single eccentric butterfly valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3471120A (en) * | 1966-06-20 | 1969-10-07 | Dresser Ind | Sealing means for butterfly valve |
| CN103591307A (en) * | 2013-11-18 | 2014-02-19 | 交城县鑫升机械有限公司 | Triple eccentric metal hard sealing butterfly valve |
| CN103759026A (en) * | 2013-12-30 | 2014-04-30 | 宁波市天基隆智控技术有限公司 | Butterfly valve |
| CN104179994A (en) * | 2013-05-26 | 2014-12-03 | 江苏络科阀门有限公司 | All-metal bidirectional high-pressure butterfly valve |
| CN104279341A (en) * | 2013-07-04 | 2015-01-14 | 浙江北泽阀门制造有限公司 | Triple-eccentric two-way hard sealing butterfly valve |
| CN104329475A (en) * | 2014-11-04 | 2015-02-04 | 无锡市亚迪流体控制技术有限公司 | Three-eccentric and bidirectional metal sealing butterfly valve |
| CN204533568U (en) * | 2015-02-10 | 2015-08-05 | 无锡智能自控工程股份有限公司 | Split type valve seat self-adjusting seal three eccentric butterfly valve |
-
2015
- 2015-02-10 CN CN201510071903.3A patent/CN104653791A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3471120A (en) * | 1966-06-20 | 1969-10-07 | Dresser Ind | Sealing means for butterfly valve |
| CN104179994A (en) * | 2013-05-26 | 2014-12-03 | 江苏络科阀门有限公司 | All-metal bidirectional high-pressure butterfly valve |
| CN104279341A (en) * | 2013-07-04 | 2015-01-14 | 浙江北泽阀门制造有限公司 | Triple-eccentric two-way hard sealing butterfly valve |
| CN103591307A (en) * | 2013-11-18 | 2014-02-19 | 交城县鑫升机械有限公司 | Triple eccentric metal hard sealing butterfly valve |
| CN103759026A (en) * | 2013-12-30 | 2014-04-30 | 宁波市天基隆智控技术有限公司 | Butterfly valve |
| CN104329475A (en) * | 2014-11-04 | 2015-02-04 | 无锡市亚迪流体控制技术有限公司 | Three-eccentric and bidirectional metal sealing butterfly valve |
| CN204533568U (en) * | 2015-02-10 | 2015-08-05 | 无锡智能自控工程股份有限公司 | Split type valve seat self-adjusting seal three eccentric butterfly valve |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240539A (en) * | 2015-10-12 | 2016-01-13 | 罗普阀业（宜兴）有限公司 | High platform all-metal hard sealing butterfly valve |
| CN106051178A (en) * | 2016-07-05 | 2016-10-26 | 英诺威阀业有限公司 | High-performance butterfly valve capable of ensuring double seal |
| CN111684184B (en) * | 2017-09-28 | 2022-03-22 | 艾默生自动化解决方案终控美国公司 | In situ gasket assembly |
| AU2018339632B2 (en) * | 2017-09-28 | 2023-02-02 | Emerson Automation Solutions Final Control US LP | In situ gasket assembly |
| CN111684184A (en) * | 2017-09-28 | 2020-09-18 | 艾默生自动化解决方案最终控制美国有限合伙公司 | In situ gasket assembly |
| EP3688345A4 (en) * | 2017-09-28 | 2021-06-30 | Emerson Automation Solutions Final Control US LP | In situ gasket assembly |
| CN107606304A (en) * | 2017-09-30 | 2018-01-19 | 和县科嘉阀门铸造有限公司 | A kind of durable valve block |
| CN108167457A (en) * | 2018-02-12 | 2018-06-15 | 无锡智能自控工程股份有限公司 | Three eccentricity sealed butterfly valve trim ring screw check structure |
| CN108916397A (en) * | 2018-09-06 | 2018-11-30 | 温州上沃阀门科技有限公司 | The valve plate of eccentric hard sealed flygate seals installing mechanism |
| CN113767054A (en) * | 2019-04-25 | 2021-12-07 | 申克普若赛斯欧洲有限公司 | Adjustable top plate of dome valve |
| CN113767054B (en) * | 2019-04-25 | 2023-09-08 | 申克普若赛斯欧洲有限公司 | Adjustable top plate of dome valve |
| CN110375077A (en) * | 2019-07-23 | 2019-10-25 | 四川苏克流体控制设备有限公司 | A kind of forced seal ultralow temperature butterfly valve |
| CN114526341A (en) * | 2022-01-21 | 2022-05-24 | 中鸿阀门股份有限公司 | Double-sealing auxiliary single eccentric butterfly valve |
| CN114526341B (en) * | 2022-01-21 | 2024-05-28 | 中鸿阀门股份有限公司 | Double-sealing auxiliary single eccentric butterfly valve |
| CN114413005A (en) * | 2022-01-22 | 2022-04-29 | 开维喜阀门集团有限公司 | Double-eccentric butterfly valve and manufacturing method of valve body sealing ring thereof |
| CN114413005B (en) * | 2022-01-22 | 2024-04-16 | 开维喜阀门集团有限公司 | Double-eccentric butterfly valve and manufacturing method of valve body sealing ring thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |
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| RJ01 | Rejection of invention patent application after publication |