CN110953354B - Four-eccentric butterfly valve - Google Patents
Four-eccentric butterfly valve Download PDFInfo
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- CN110953354B CN110953354B CN201911338053.3A CN201911338053A CN110953354B CN 110953354 B CN110953354 B CN 110953354B CN 201911338053 A CN201911338053 A CN 201911338053A CN 110953354 B CN110953354 B CN 110953354B
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- valve
- valve seat
- valve body
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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
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
- F16K27/0218—Butterfly valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a four-eccentric butterfly valve, which comprises a valve body, wherein a valve rod and a bottom cover are arranged on the valve body, a butterfly plate is fixed on the valve rod and rotates to realize opening and closing of a flow channel of the valve body, a sealing ring embedded on the butterfly plate is contacted with a valve seat welded on the inner wall of the valve body, an eccentricity a is arranged between the central line of the valve rod and the neutral surface of the valve seat, an eccentricity B is arranged between the central line of the valve rod and the central line of the flow channel of the valve body, the included angle between the central line of the rotary central line of the valve seat projected on the section A-A of the valve seat and the central line of the flow channel is alpha, the section A-A of the valve seat is a half section of the valve seat vertical to the central line of the valve rod, the rotation angle beta of the section A-A of the valve seat around the axis C forms a section B-B of the valve seat, the rotary central line of the valve seat is positioned on the section B-B of the valve seat, and the included angle alpha is equal to the included angle beta. The device ensures that the positions of the sealing surfaces of the upper point and the lower point are different from the included angle of a product of the rotation center line of the cone by setting the fourth eccentric quantity, thereby having the wedge function when the valve is closed.
Description
Technical Field
The invention relates to the technical field of butterfly valve sealing performance improvement design, in particular to a four-eccentric butterfly valve.
Background
In the prior art, a triple eccentric butterfly valve in the butterfly valves is widely applied to industrial pipelines of metallurgy, electric power, petrochemical industry, water supply and drainage, municipal construction and the like with the medium temperature of less than or equal to 425 ℃ and is used for adjusting flow and carrying and breaking fluid. The material is divided into: cast iron, cast steel, stainless steel. In the structure of the three-eccentric butterfly valve, the axis of the valve rod deviates from the center of the disc and the center of the body at the same time, and the rotation axis of the valve seat and the axis of the valve body channel form a certain angle. However, the upper and lower points of the existing triple eccentric seal butterfly valve are easy to leak, and the sealing performance needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a four-eccentric butterfly valve, which ensures that the positions of the sealing surfaces of an upper point and a lower point are different from the included angle of a product of a rotating center line of a cone by setting a fourth eccentric amount, thereby having the wedge function when the valve is closed.
In order to achieve the purpose, the invention adopts the technical scheme that: a four-eccentric butterfly valve comprises a valve body, wherein a valve rod and a bottom cover are arranged on the valve body, a butterfly plate is fixed on the valve rod and rotates to realize opening and closing of a flow channel of the valve body, a sealing ring embedded on the butterfly plate is in contact with a valve seat welded on the inner wall of the valve body, an eccentricity a is arranged between a central line of the valve rod and a neutral surface of the valve seat, an eccentricity B is arranged between the central line of the valve rod and the central line of the flow channel of the valve body, an included angle alpha is formed between a central line of a rotary central line of the valve seat projected on a section A-A of the valve seat and the central line of the flow channel, the section A-A of the valve seat is a half section of the valve seat perpendicular to the central line of the valve rod, the section A-A of the valve seat rotates around an axis C by an angle beta to form a section B-B of the valve seat, the rotary central line of the valve seat is positioned on the section B-B of the valve seat, and the included angle alpha is equal to the included angle beta.
The axis C is positioned on the section A-A of the valve seat and is vertical to the center line of the flow channel of the valve body, the axis C passes through a point C, and the intersection point of the center line of the rotary center line of the valve seat projected on the section A-A of the valve seat and the center line of the flow channel is the point C.
The valve body is cylindrical in external shape, and is internally provided with a special-shaped conical surface.
The two projection circle centers at the two ends inside the valve body are positioned at the two sides of the projection circle center outside the valve body.
The valve rod fixes the butterfly plate through the pin, and the sealing ring is fixed on the butterfly plate through the screw and the pressing block.
A limiting ring is arranged between the valve rod and the valve body, and the bottom cover is fixed on the valve body through a screw.
The included angle beta is 5-13 degrees.
Compared with the prior art, the invention has the beneficial effects that: the invention ensures that the included angles between the positions of the upper and lower two sealing surfaces and a product of a cone rotation center line are different by setting the fourth eccentric quantity, thereby having the wedge-caulking effect when the valve is closed.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a partial cross-sectional view of FIG. 1;
FIG. 3 is a sectional view taken along line A-A of FIG. 1;
FIG. 4 is a front view of the valve seat of the present invention;
fig. 5 is a perspective view of the valve seat of the present invention.
The labels in the figures are: 1. a valve stem; 2. a valve body; 3. a pin; 4. a limiting ring; 5. a screw; 6. a bottom cover; 7. a seal ring; 8. a butterfly plate; 9. a valve seat.
Detailed Description
The following detailed description is provided in conjunction with the embodiments and with reference to the accompanying drawings in order to provide a further explanation of the technical features and advantages of the present invention.
As shown in figures 1-5, the four-eccentric butterfly valve of the invention comprises a valve body 2, a valve rod 1 and a bottom cover 6 are arranged on the valve body, a butterfly plate 8 is fixed on the valve rod, the butterfly plate rotates to realize the opening and closing of a flow passage of the valve body, a seal ring 7 embedded on the butterfly plate is contacted with a valve seat 9 welded on the inner wall of the valve body, an eccentricity a is arranged between the central line of the valve rod and the neutral surface of the valve seat, an eccentricity B is arranged between the central line of the valve rod and the central line of the flow passage of the valve body, the included angle between the central line of the revolution central line of the valve seat projected on the section A-A of the valve seat and the central line of the flow passage is alpha, the section A-A of the valve seat is a half section of the valve seat vertical to the central line of the valve rod, the rotation angle beta of the section A-A of the valve seat around an axis C forms a section B-B of the valve seat, the revolution central line is positioned on the section B of the valve seat, the section of the valve seat, and the section of the valve seat are shown in figures 1 and 2 as character marks, the cross-sectional view of the valve seat B-B is the same as the cross-sectional view of the valve seat A-A in FIG. 3, and therefore not shown, and the included angle α is equal to the included angle β, which is in the range of 5-13 degrees. The axis C is positioned on the section A-A of the valve seat and is vertical to the center line of the flow channel of the valve body, the axis C passes through a point C, and the intersection point of the center line of the rotary center line of the valve seat projected on the section A-A of the valve seat and the center line of the flow channel is the point C.
Furthermore, the outer shape of the valve body is cylindrical, and the inner part of the valve body is a special-shaped conical surface. The two projection circle centers at the two ends inside the valve body are positioned at the two sides of the projection circle center outside the valve body. The valve rod fixes the butterfly plate through the pin 3, and the sealing ring is fixed on the butterfly plate through the screw 5 and the pressing block.
Furthermore, a limiting ring 4 is arranged between the valve rod and the valve body, and the bottom cover is fixed on the valve body through a screw 5.
The device of the invention is additionally provided with a fourth eccentric amount on the basis of the conventional three-eccentric butterfly valve, and the problems to be solved are as follows: through the setting of the fourth eccentric beta angle, the butterfly plate of the butterfly valve is prevented from being on the section plane along the axis of the valve rod, namely 12 o 'clock and 6 o' clock directions shown in fig. 2, the included angle of the section plane of the butterfly valve is the same as that of a horizontal line, and the same included angle enables the sealing ring to have the same approaching and departing angles when the sealing ring rotates along the axis of the valve rod, so that the two parts are easy to leak. Through the setting of beta angle, guarantee that these two positions that the contained angle is the same position not in the plane the same with the valve rod axis, when rotating the valve rod and drive the butterfly plate rotatory, every point on the sealing washer excircle on the butterfly plate all has different angle of approach and leaving to realize the wedging principle of eccentric butterfly valve, really realize zero and reveal.
In the device, the specific numerical values of the eccentricity a and the eccentricity b are selected according to practical conditions, the welding mode of the valve body and the material of each part are selected from the prior art or materials, and the technical personnel can directly purchase or order from the market according to the required product model and specification.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
The present invention is described in detail and completely by the technical solutions in the above embodiments, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (6)
1. A four-eccentric butterfly valve comprises a valve body, wherein a valve rod and a bottom cover are arranged on the valve body, a butterfly plate is fixed on the valve rod, and the butterfly plate rotates to realize opening and closing of a flow channel of the valve body;
the axis C is positioned on the section A-A of the valve seat and is vertical to the center line of the flow channel of the valve body, the axis C passes through a point C, and the intersection point of the center line of the rotary center line of the valve seat projected on the section A-A of the valve seat and the center line of the flow channel is the point C.
2. The four-eccentric butterfly valve of claim 1, wherein the valve body has an outer cylindrical shape and an inner contoured tapered surface.
3. The four-eccentric butterfly valve according to claim 2, wherein the two projected centers of the two ends inside the valve body are located on both sides of the projected center of the outside of the valve body.
4. A four-eccentric butterfly valve according to claim 3, in which the valve stem is fixed to the butterfly plate by means of a pin, and the seal is fixed to the butterfly plate by means of a screw and a pressure block.
5. The four-eccentric butterfly valve of claim 4, wherein a stop ring is provided between the valve stem and the valve body, and the bottom cover is fixed to the valve body by screws.
6. A four-eccentric butterfly valve according to any of claims 1 to 5, in which the angle β is between 5 and 13 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338053.3A CN110953354B (en) | 2019-12-23 | 2019-12-23 | Four-eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338053.3A CN110953354B (en) | 2019-12-23 | 2019-12-23 | Four-eccentric butterfly valve |
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| Publication Number | Publication Date |
|---|---|
| CN110953354A CN110953354A (en) | 2020-04-03 |
| CN110953354B true CN110953354B (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911338053.3A Active CN110953354B (en) | 2019-12-23 | 2019-12-23 | Four-eccentric butterfly valve |
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| CN (1) | CN110953354B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110098129A (en) * | 2010-02-26 | 2011-09-01 | 한국유니콤밸브주식회사 | Multiple eccentric butterfly valve |
| JP5605967B1 (en) * | 2013-12-18 | 2014-10-15 | 株式会社日本自動調節器製作所 | Eccentric butterfly valve |
| CN106763822A (en) * | 2016-12-14 | 2017-05-31 | 重庆理工大学 | A kind of four eccentric-butterfly-valves |
| CN206290725U (en) * | 2016-12-15 | 2017-06-30 | 重庆川仪调节阀有限公司 | Four eccentric sealed butterfly valve constructions |
| JP6523735B2 (en) * | 2015-03-27 | 2019-06-05 | 株式会社栗本鐵工所 | Butterfly valve |
-
2019
- 2019-12-23 CN CN201911338053.3A patent/CN110953354B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110098129A (en) * | 2010-02-26 | 2011-09-01 | 한국유니콤밸브주식회사 | Multiple eccentric butterfly valve |
| JP5605967B1 (en) * | 2013-12-18 | 2014-10-15 | 株式会社日本自動調節器製作所 | Eccentric butterfly valve |
| JP6523735B2 (en) * | 2015-03-27 | 2019-06-05 | 株式会社栗本鐵工所 | Butterfly valve |
| CN106763822A (en) * | 2016-12-14 | 2017-05-31 | 重庆理工大学 | A kind of four eccentric-butterfly-valves |
| CN206290725U (en) * | 2016-12-15 | 2017-06-30 | 重庆川仪调节阀有限公司 | Four eccentric sealed butterfly valve constructions |
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| Publication number | Publication date |
|---|---|
| CN110953354A (en) | 2020-04-03 |
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