CN105156699A - Seal-ring-bearing three-eccentric seal butterfly valve - Google Patents
Seal-ring-bearing three-eccentric seal butterfly valve Download PDFInfo
- Publication number
- CN105156699A CN105156699A CN201510604534.XA CN201510604534A CN105156699A CN 105156699 A CN105156699 A CN 105156699A CN 201510604534 A CN201510604534 A CN 201510604534A CN 105156699 A CN105156699 A CN 105156699A
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- Prior art keywords
- seal
- valve body
- valve
- seal ring
- sealing
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- 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
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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
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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
- F16K1/2268—Sealing means 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
- F16K1/228—Movable sealing bodies
-
- 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
- F16K1/46—Attachment of sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a seal-ring-bearing three-eccentric seal butterfly valve, relating to the field of valves. The seal-ring-bearing three-eccentric seal butterfly valve comprises a valve body, an operating mechanism, a disk plate assembly and a valve stem, wherein the operating mechanism is positioned outside the valve body; one end of the valve stem is positioned outside the valve body and connected with the operating mechanism, and the other end is positioned inside the valve body and connected with the disk plate assembly; a valve body sealing surface used for matching with the disk plate assembly is arranged inside the valve body; the disk plate assembly comprises a disk plate, a pressure plate and a seal ring; the seal ring comprises a seal end and a fixed end; the fixed end is positioned between the disk plate and pressure plate; the seal end is positioned outside the disk plate, and used for matching with the valve body sealing surface; and the cross-section area of the seal end is smaller than that of the disk plate. The seal-ring-bearing three-eccentric seal butterfly valve can implement zero medium leakage, well improve the opening and reversing sealing properties, and widen the application range of the three-eccentric seal butterfly valve.
Description
Technical field
The present invention relates to valve field, be specifically related to a kind of three eccentricity seal butterfly valve with seal ring.
Background technique
Butterfly valve is the simple modulating valve of a kind of structure, also can be used for the switch control rule of low pressure pipeline medium, butterfly valve generally includes valve body, valve rod, dish plate and seal ring, and valve rod, dish plate and seal ring are all arranged on the inside of valve body simultaneously, valve rod is connected with dish plate, and seal ring matches with dish plate.
Traditional butterfly valve is generally used for the not high occasion of normal temperature, low pressure and sealing requirements, but, along with the development of modern technology and material industry, for meeting various working condition requirement, butterfly valve successively experienced by the differentiation from concentric to single bias, two bias and three eccentricity.Three eccentric butterfly valve is widely used on the various important pipelines such as the process control of each large industrial field such as electric power, petrochemical industry, metallurgical steel-making, water treatment, natural gas extraction, offshore platform due to its excellent performance.
Three eccentric butterfly valve while the valve rod shaft core position bias of two eccentric disk valve, make the cone type axis deviation of butterfly plate sealing surface in body cylinder axis, make the sealing section of butterfly plate no longer be proper circle but shape that is oval, its sealing surface is also therefore asymmetric: to favour body central line, another side and be then parallel to body central line.Thus cause the seal construction of three eccentric butterfly valve to become torsion sealing from position seals, it relies on the surface of contact pressure of valve seat to reach sealing effect completely, to reach sealing effect completely not identical with the resiliently deformable of the dependence valve seat of two eccentric disk valve, and due to the surface of contact pressure of valve seat be directly proportional to the pressure of medium, therefore, three eccentric butterfly valve can be used in the environment of High Temperature High Pressure.
In use, there is following defect in existing three eccentric butterfly valve:
(1) sealing surface of three eccentric butterfly valve is cone structure, and the requirement of machining accuracy is higher, and difficulty of processing is comparatively large, and the particularly three eccentric butterfly valve of metal hard sealing structure, the zero leakage that realize medium is very difficult.
(2) because the valve rod gyration center of three eccentric butterfly valve and the center of valve body exist bias, therefore there is medium unbalance moment, there is larger adverse effect when butterfly valve being opened and oppositely seals, due to the existence of these 2 reasons, the application area of butterfly valve is a greater impact.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of three eccentricity seal butterfly valve with seal ring, zero leakage of medium can not only be realized, and unlatching and reverse sealability can be improved preferably, the using scope of three eccentric butterfly valve can be expanded.
For reaching above object, the technological scheme that the present invention takes is: a kind of three eccentricity seal butterfly valve with seal ring, comprise valve body, operating device, dish board component and valve rod, described operating device is positioned at the outside of valve body, one end of described valve rod is positioned at the outside of valve body and is connected with operating device, the other end is positioned at the inside of valve body and is connected with dish board component, described valve inner has the valve body sealing surface for matching with dish board component, described dish board component comprises dish plate, pressing plate and seal ring, described seal ring comprises sealed end and fixed end, described fixed end is between dish plate and pressing plate, described sealed end is positioned at the outside of dish plate, described sealed end is used for matching with valve body sealing surface, and the cross-section area of described sealed end is less than the cross-section area of described dish plate.
On the basis of technique scheme, described seal ring comprises hermetically sealed case, is a Seal cage in described hermetically sealed case, and be provided with a spring and a Sealing in described Seal cage, described spring is positioned at the bottom of Sealing.
On the basis of technique scheme, the arranged outside of described hermetically sealed case has a pad.
On the basis of technique scheme, described hermetically sealed case adopts metallic material to make, and described Sealing adopts nonmetallic material to make.
On the basis of technique scheme, described dish board component comprises two working staties: sealing state and opening state.
On the basis of technique scheme, when described dish board component is sealing state, the sealing surface of described seal ring is positioned at the sealing surface place of valve body, and fits tightly with valve body.
On the basis of technique scheme, when described dish board component is opening state, the sealing surface of seal ring is positioned at beyond valve body sealing surface, and has certain gap between seal ring and valve body.
On the basis of technique scheme, the bottom of described valve body is provided with lower end cap, valve rod is provided with divided ring away between one end of operating device and lower end cap, be disposed with filler cover plate, Gland, filler and Upper shaft sleeve from top to bottom between the top of valve rod and valve body, between the bottom of valve rod and valve body, be provided with Lower shaft sleeve.
Compared with prior art, the invention has the advantages that:
(1) in the present invention with the three eccentricity seal butterfly valve of seal ring, comprise seal ring, seal ring comprises sealed end and fixed end, fixed end is between dish plate and pressing plate, sealed end is positioned at the outside of dish plate, sealed end is used for matching with valve body sealing surface, and the cross-section area of sealed end is less than the cross-section area of dish plate, because three eccentric butterfly valve is in opening and closing process, there is the situation that butterfly plate sealing surface and valve body sealing surface interfere mutually to occur, when the sealing surface of dish plate is wider, more easily interfere, in the present invention, the cross-section area of sealed end is less than the cross-section area of dish plate, therefore, sealing surface is narrower, can avoid interfering, in using process, sealing effect is better, zero leakage of medium can be realized, simultaneously, when sealing surface is narrower, necessary seal pressure needed for butterfly valve is little, be easy to realize sealing, also reduce the unbalance moment that the medium that causes due to bias produces simultaneously, reduce the moment needed for valve opening and closing, also make the reverse sealing effect of valve be improved, unlatching and reverse sealability can be improved preferably.
(2) in the present invention with the three eccentricity seal butterfly valve of seal ring, seal ring comprises hermetically sealed case, it is a Seal cage in hermetically sealed case, a spring and a Sealing is provided with in Seal cage, spring is positioned at the bottom of Sealing, seal ring in use, because the sealing surface of Sealing top and valve body occurs repeatedly to rub, there will be wearing and tearing, now, spring can extend, and the top of the Sealing being and the sealing surface of valve body fit tightly, avoid butterfly valve to leak in sealed states, and the working life of butterfly valve can be extended.
(3) in the present invention with the three eccentricity seal butterfly valve of seal ring, hermetically sealed case adopts metallic material to make, Sealing adopts nonmetallic material to make, hermetically sealed case is metallic material, larger external force can be born, avoid that impulse force is excessive to deform, and hermetically sealed case and dish plate, be fixedly connected with between seal ring pressing plate, the top of hermetically sealed case supports when being in sealing state on valve body sealing surface, ensure when high temperature media condition lower seal lost efficacy, still good sealing effect can be realized, make the adaptive capacity to environment of butterfly valve strong, the applied range of butterfly valve can be increased.
Accompanying drawing explanation
Fig. 1 is the structural representation with the three eccentricity seal butterfly valve of seal ring in the embodiment of the present invention;
Fig. 2 is the sectional view of Fig. 1 along A-A direction;
Fig. 3 is the enlarged view of B in Fig. 2.
In figure: 1-Gland, 2-valve body, 3-valve rod, 4-dish board component, 5-Lower shaft sleeve, 6-divided ring, 7-lower end cap, 8-operating device, 9-filler cover plate, 10-filler, 11-Upper shaft sleeve, 12-hermetically sealed case, 13-pressing plate, 14-seal ring, 15-Sealing, 16-pad, 17-dish plate, 18-spring, 19-valve body sealing surface, 20-sealed end, 21-fixed end.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of three eccentricity seal butterfly valve with seal ring, comprise valve body 2, operating device 8, dish board component 4 and valve rod 3, valve body 2 is a cavity body structure, there is a valve body sealing surface 19 for matching with dish board component 4 valve body 2 inside, and one end of valve rod 3 is positioned at the outside of valve body 2 and is connected with operating device 8, and the other end is positioned at the inside of valve body 2 and is connected with dish board component 4, when operating device 8 rotates, dish board component 4 can be driven to rotate by valve rod 3.
The bottom of valve body 2 is provided with lower end cap 7, valve rod 3 is provided with divided ring 6 away between one end of operating device 8 and lower end cap 7, be disposed with filler cover plate 9, Gland 1, filler 10 and Upper shaft sleeve 11 between the top of valve rod 3 and valve body 2 from top to bottom, between the bottom of valve rod 3 and valve body 2, be provided with Lower shaft sleeve 5.
Shown in Fig. 2 and Fig. 3, dish board component 4 comprises dish plate 17, pressing plate 13 and seal ring 14, and seal ring 14 comprises sealed end 20 and fixed end 21, fixed end 21 is between dish plate 17 and pressing plate 13, sealed end 20 is positioned at the outside of dish plate 17, sealed end 20 is for matching with valve body sealing surface 19, dish board component 4 comprises two working staties: sealing state and opening state, when dish board component 4 is sealing state, the sealing surface of seal ring 14 is positioned at the sealing surface place of valve body 2, and fits tightly with valve body 2; When dish board component 4 is opening state, the sealing surface of seal ring 14 is positioned at beyond valve body 2 sealing surface, and has certain gap between seal ring 14 and valve body 2, and medium can pass through.
Shown in Figure 3, seal ring 14 comprises hermetically sealed case 12, and the arranged outside of hermetically sealed case 12 has a pad 16, is provided with Seal cage in hermetically sealed case 12, and be provided with spring 18 and a Sealing 15 in Seal cage, spring 18 is positioned at the bottom of Sealing 15.Hermetically sealed case 12 adopts metallic material to make, and Sealing 15 adopts nonmetallic material to make, and the cross-section area of the sealed end 20 of Sealing 15 is less than the cross-section area of described dish plate 17.
Seal ring 14 in use, because the sealing surface of Sealing 15 top and valve body 2 occurs repeatedly to rub, there will be wearing and tearing, now, spring 18 can extend, the top of the Sealing 15 being and the sealing surface of valve body 2 fit tightly, and avoid butterfly valve to leak in sealed states, and can extend the working life of butterfly valve.
Hermetically sealed case 12 is metallic material, larger external force can be born, avoid that impulse force is excessive to deform, and hermetically sealed case 12 is fixedly connected with between dish plate 17, seal ring pressing plate 13, the top of hermetically sealed case 12 supports on valve body 2 sealing surface when being in sealing state, ensure, when high temperature media condition lower seal 15 lost efficacy, still can realize good sealing effect.
The working principle of the embodiment of the present invention is: three eccentric butterfly valve is except valve rod 3 and valve plate two bias, the cone type axis deviation of dish plate 17 sealing surface is in dish plate 17 body cylinder axis, the sealing section of dish plate 17 is made to be no longer circular, but it is oval, its sealing surface shape is asymmetric, favours body central line, another side and is then parallel to body central line.Therefore three eccentric butterfly valve is in opening and closing process, there is the situation that butterfly plate sealing surface and valve body 2 sealing surface interfere mutually and occurs, when the sealing surface of dish plate 17 is wider, more easily interfere.
The embodiment of the present invention is by Strength co-mputation and Three-dimensional simulation analysis, dish plate 17 arranges a seal ring 14, coordinated with valve body 2 sealing surface by seal ring 14, realize sealing, seal ring 14 comprises hermetically sealed case 12, the arranged outside of hermetically sealed case 12 has a pad 16, Seal cage is provided with in hermetically sealed case 12, spring 18 and a Sealing 15 is provided with in Seal cage, and sealed end 20 cross-section area of Sealing 15 is less than the cross-section area of dish plate 17, therefore, sealed width can be reduced, , the generation of interference phenomenon when making valve just can avoid opening and closing within the scope of less radial disbalance.And then reduce valve opening and closing moment, realize the reverse sealing of three eccentric butterfly valve.
Butterfly valve in use, is assembled and can be installed on pipeline after debugging by the three eccentric butterfly valve in the present embodiment, shown in Figure 1, and MEDIA FLOW is to being butterfly valve forward forward, and namely MEDIA FLOW is to the direction being conducive to sealing; Otherwise MEDIA FLOW is to being unfavorable for sealing.When MEDIA FLOW is to when being unfavorable for sealing, need to provide higher sealed force moment could realize good sealing effect.
The present invention is not limited to above-mentioned mode of execution, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (8)
1. the three eccentricity seal butterfly valve with seal ring, comprise valve body (2), operating device (8), dish board component (4) and valve rod (3), described operating device (8) is positioned at the outside of valve body (2), one end of described valve rod (3) is positioned at the outside of valve body (2) and is connected with operating device (8), the other end is positioned at the inside of valve body (2) and is connected with dish board component (4), it is characterized in that: there is the valve body sealing surface (19) for matching with dish board component (4) described valve body (2) inside, described dish board component (4) comprises dish plate (17), pressing plate (13) and seal ring (14), described seal ring (14) comprises sealed end (20) and fixed end (21), described fixed end (21) is positioned between dish plate (17) and pressing plate (13), described sealed end (20) is positioned at the outside of dish plate (17), described sealed end (20) is for matching with valve body sealing surface (19), and the cross-section area of described sealed end (20) is less than the cross-section area of described dish plate (17).
2. a kind of three eccentricity seal butterfly valve with seal ring as claimed in claim 1, it is characterized in that: described seal ring (14) comprises hermetically sealed case (12), be a Seal cage in described hermetically sealed case (12), be provided with a spring (18) and a Sealing (15) in described Seal cage, described spring (18) is positioned at the bottom of Sealing (15).
3. a kind of three eccentricity seal butterfly valve with seal ring as claimed in claim 2, is characterized in that: the arranged outside of described hermetically sealed case (12) has a pad (16).
4. a kind of three eccentricity seal butterfly valve with seal ring as claimed in claim 2, is characterized in that: described hermetically sealed case (12) adopts metallic material to make, and described Sealing (15) adopts nonmetallic material to make.
5. a kind of three eccentricity seal butterfly valve with seal ring as claimed in claim 1, is characterized in that: described dish board component (4) comprises two working staties: sealing state and opening state.
6. a kind of three eccentricity seal butterfly valve with seal ring as claimed in claim 5, it is characterized in that: when described dish board component (4) is for sealing state, the sealing surface of described seal ring (14) is positioned at the sealing surface place of valve body (2), and fits tightly with valve body (2).
7. a kind of three eccentricity seal butterfly valve with seal ring as claimed in claim 5, it is characterized in that: when described dish board component (4) is for opening state, the sealing surface of seal ring (14) is positioned at beyond valve body (2) sealing surface, and has certain gap between seal ring (14) and valve body (2).
8. a kind of three eccentricity seal butterfly valve with seal ring according to any one of claim 1 to 7, it is characterized in that: the bottom of described valve body (2) is provided with lower end cap (7), valve rod (3) is provided with divided ring (6) away between one end of operating device (8) and lower end cap (7), filler cover plate (9) is disposed with from top to bottom between the top of valve rod (3) and valve body (2), Gland (1), filler (10) and Upper shaft sleeve (11), Lower shaft sleeve (5) is provided with between the bottom of valve rod (3) and valve body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604534.XA CN105156699B (en) | 2015-09-21 | 2015-09-21 | A kind of three eccentricity sealed butterfly valve with sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604534.XA CN105156699B (en) | 2015-09-21 | 2015-09-21 | A kind of three eccentricity sealed butterfly valve with sealing ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105156699A true CN105156699A (en) | 2015-12-16 |
| CN105156699B CN105156699B (en) | 2017-09-22 |
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ID=54797670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510604534.XA Active CN105156699B (en) | 2015-09-21 | 2015-09-21 | A kind of three eccentricity sealed butterfly valve with sealing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105156699B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269860A (en) * | 2017-07-28 | 2017-10-20 | 昆山维萨阀门有限公司 | A kind of butterfly valve available for high pressure operating mode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4860994A (en) * | 1987-06-29 | 1989-08-29 | Akira Oshima | Seal system for butterfly valve |
| CN201902572U (en) * | 2010-11-17 | 2011-07-20 | 上海凯莱阀门制造有限公司 | Tri-eccentric bidirectional metal hard sealing butterfly valve |
| CN203571075U (en) * | 2013-11-18 | 2014-04-30 | 宁波埃美柯铜阀门有限公司 | Sealing pair structure of triple eccentric metal sealing butterfly valve |
| CN203979440U (en) * | 2014-08-08 | 2014-12-03 | 浙江精杰实业有限公司 | A kind of three eccentric 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 |
-
2015
- 2015-09-21 CN CN201510604534.XA patent/CN105156699B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4860994A (en) * | 1987-06-29 | 1989-08-29 | Akira Oshima | Seal system for butterfly valve |
| CN201902572U (en) * | 2010-11-17 | 2011-07-20 | 上海凯莱阀门制造有限公司 | Tri-eccentric bidirectional metal hard sealing butterfly valve |
| CN203571075U (en) * | 2013-11-18 | 2014-04-30 | 宁波埃美柯铜阀门有限公司 | Sealing pair structure of triple eccentric metal sealing butterfly valve |
| CN203979440U (en) * | 2014-08-08 | 2014-12-03 | 浙江精杰实业有限公司 | A kind of three eccentric 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269860A (en) * | 2017-07-28 | 2017-10-20 | 昆山维萨阀门有限公司 | A kind of butterfly valve available for high pressure operating mode |
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| Publication number | Publication date |
|---|---|
| CN105156699B (en) | 2017-09-22 |
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