CN107246481B - Maintenance-free full-sealed cut-off butterfly valve - Google Patents
Maintenance-free full-sealed cut-off butterfly valve Download PDFInfo
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- CN107246481B CN107246481B CN201710693511.XA CN201710693511A CN107246481B CN 107246481 B CN107246481 B CN 107246481B CN 201710693511 A CN201710693511 A CN 201710693511A CN 107246481 B CN107246481 B CN 107246481B
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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
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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
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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
- F16K1/36—Valve members
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a maintenance-free full-sealed cut-off butterfly valve, and relates to the technical field of valves. The first air sealing area is arranged in the area between the inner wall of the annular component and the outer edge of the disc plate, the second air sealing area is arranged in the area between the inner holes at the two ends of the valve body and the valve rod, high air pressure is formed in the first air sealing area and the second air sealing area, the principle that air flows from the high pressure area to the low pressure area is utilized, the high air in the first air sealing area and the high air in the second air sealing area can flow to the low pressure area (the areas at the two sides of the disc plate) at the two sides of the air sealing area, so that leakage of air from one side of the disc plate to the other side is avoided, sealing of the valve is realized, and in addition, as the disc plate and the inner wall of the annular component are not in direct contact, parts such as the disc plate are not worn, and therefore the parts do not need to be replaced, and the maintenance-free effect is achieved.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a maintenance-free full-sealed cut-off butterfly valve.
Background
With the development of economy, the level of industrial automation control is continuously increasing, and thus, the demands on the reliability and economy of the regulating valve in process control are also continuously increasing. This also places higher demands on the valve body structure.
At present, the cut-off butterfly valve that uses includes the valve body and the valve rod of installing on the valve body, with valve rod fixed connection and around valve rod at valve body valve pocket internal rotation's dish board, to the region between sealing area and the valve rod between dish board and the valve body hole, though also have some structural breakthroughs, improved the sealed effect in this region, like following patent: the flange type double-eccentric soft sealing butterfly valve (CN 204114171U) provides a sealing ring with a double-eccentric structure and an inclined conical structure, the sealing effect is realized by utilizing the extrusion between a butterfly plate and a valve body, and the wear rate of the sealing ring is reduced by the eccentric design; a triple eccentric hard seal butterfly valve (CN 206309964U) mainly solves the design breakthrough of a triple eccentric structure and adopts a hard seal mode; a bidirectional high-performance soft sealing butterfly valve (CN 202032102U) provides a sealing design of bidirectional medium flow, and sealing is realized by adopting a sealing ring. However, soft sealing or hard sealing is adopted in the sealing area, but no matter the soft sealing or hard sealing is adopted, the physical components are contacted, so that the disc plate is continuously contacted with the sealing element in the rotating process, the disc plate is worn, the service life is reduced, and the leakage risk is increased.
Disclosure of Invention
The invention aims to provide a maintenance-free full-sealed cut-off butterfly valve, so as to solve the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a maintenance-free totally enclosed butterfly valve that cuts off, includes valve body, valve rod, dish board and annular component, be provided with the valve pocket that link up the valve body in the valve body, the valve rod is installed on the valve body, the one end of valve rod is fixed in the hole of valve body one end, the other end of valve rod passes the hole of the other end of valve body is connected with drive arrangement's pivot, the dish board with valve rod fixed connection and can rotate around the valve rod in the valve pocket;
the annular member is arranged on the inner wall of the valve body, the axis of the annular member is coincident with the axis of the valve body, the annular member is of a hollow structure surrounded by the inner wall, the outer wall and the two side walls, an external gas connection port is formed in the outer wall, and a plurality of small air holes are formed in the inner wall;
the area between the inner wall of the annular component and the outer edge of the disc plate is set to be a first air sealing area, and the area between the inner holes at the two ends of the valve body and the valve rod is set to be a second air sealing area.
Preferably, the diameter of the small air holes on the annular member is 4-6mm, all the small air holes are uniformly arranged on the inner wall of the annular member, and the distance between two adjacent small air holes is 35-40mm.
Preferably, the thickness of the first air sealing area is smaller than 2mm.
Preferably, the width x thickness of the annular member is: 80X 50mm.
Preferably, the width of the outer edge of the dish plate is the same as the width of the annular member.
The beneficial effects of the invention are as follows: according to the maintenance-free full-sealed cut-off butterfly valve provided by the embodiment of the invention, the first air sealing area is arranged in the area between the inner wall of the annular component and the outer edge of the disc plate, the second air sealing area is arranged in the area between the inner holes at the two ends of the valve body and the valve rod, high air pressure is formed in the first air sealing area and the second air sealing area, the principle that air flows from the high pressure area to the low pressure area is utilized, the high air in the first air sealing area and the second air sealing area flows to the low pressure area (the areas at the two sides of the disc plate) at the two sides of the air sealing area, so that leakage of air from one side of the disc plate to the other side is avoided, sealing of the valve is realized, and in addition, the disc plate and the inner wall of the annular component are not in direct contact, so that parts such as the disc plate cannot be worn, and the parts do not need to be replaced, and the maintenance-free effect is achieved.
Drawings
FIG. 1 is a cross-sectional view of a maintenance-free fully sealed shut-off butterfly valve provided by the invention in a closed state;
FIG. 2 is an enlarged view of a portion of FIG. 1 at position C;
FIG. 3 is a cross-sectional view in the direction A of FIG. 1;
FIG. 4 is an enlarged view of a portion of the D position of FIG. 3;
FIG. 5 is a cross-sectional view in the B direction of FIG. 3;
FIG. 6 is a cross-sectional view of the maintenance-free fully sealed shut-off butterfly valve provided by the invention in an open state.
In the figure, the meanings of the symbols are as follows:
the valve comprises a valve body 1, a valve rod 2, a disc plate 3, a valve cavity 4, a driving device 5, an annular member 6, an external gas connecting port 7, a small air hole 8, a first gas sealing area 9 and a second gas sealing area 10.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description is presented by way of example only and is not intended to limit the invention.
As shown in fig. 1-6, the embodiment of the invention provides a maintenance-free full-sealed cut-off butterfly valve, which comprises a valve, a valve rod 1, a valve rod 2, a disc plate 3 and an annular member 6, wherein a valve cavity 4 penetrating through the valve body is arranged in the valve body 1, the valve rod 2 is arranged on the valve body 1, one end of the valve rod 2 is fixed in an inner hole at one end of the valve body 1, the other end of the valve rod 2 penetrates through the inner hole at the other end of the valve body 1 to be connected with a rotating shaft of a driving device 5, and the disc plate 3 is fixedly connected with the valve rod 2 and can rotate around the valve rod 2 in the valve cavity 4;
the annular member 6 is arranged on the inner wall of the valve body 1, the axis of the annular member 6 coincides with the axis of the valve body 1, the annular member 6 is of a hollow structure surrounded by the inner wall, the outer wall and two side walls, the outer wall is provided with an external gas connection port 7, and the inner wall is provided with a plurality of small air holes 8;
the area between the inner wall of the annular member 6 and the outer edge of the disc 3 is provided as a first air seal area 9, and the area between the inner holes at both ends of the valve body 1 and the valve stem 2 is provided as a second air seal area 10.
The working principle of the cut-off butterfly valve with the structure is as follows:
the valve rod rotates under the drive of drive arrangement pivot, and the rotation of valve rod drives the dish board and rotates, and the dish board is at pivoted in-process, realizes opening and closing, when the dish board rotate to with valve body parallel position, the butterfly valve be in closed condition, when the dish board rotate to with valve body vertical position, the butterfly valve be in open condition.
When the butterfly valve is in a closed state, in order to ensure that gas at two sides of the butterfly plate cannot leak inwards, the position of the butterfly plate, which is close to the circumference line of the valve body, needs to be sealed.
In the embodiment of the invention, in order to realize the sealing of the first gas seal area and the second gas seal area, when the butterfly valve is in a closed state, the gas at two sides of the butterfly plate is not leaked inwards, an external gas channel is connected at an external gas connecting port of the outer wall of the annular member, so that the external gas enters the annular member, the external gas entering the annular member enters the first gas seal area and the second gas seal area through small air holes on the inner wall of the annular member, and the pressure of the gas entering the first gas seal area and the second gas seal area from the small air holes is very high due to the small air holes on the inner wall, so that high-pressure gas is formed, such as solid arrows in the figure;
the gas in the valve cavity is low-pressure gas relative to the high-pressure gas in the first gas seal area, as shown by the hollow arrow;
according to the principle that gas flows from a high-pressure area to a low-pressure area, high-pressure gas positioned in a first gas seal area and a second gas seal area flows to the low-pressure areas (areas on two sides of a disc plate) on two sides of the gas seal area, as shown by the flowing direction of solid arrows in the figure; the gas in the low pressure areas (areas on two sides of the disc plate) on two sides of the first gas seal area and the second gas seal area cannot flow to the high pressure areas of the first gas seal area and the second gas seal area, so that the gas in the low pressure area cannot pass through the first gas seal area and the second gas seal area, and then flows from one side of the disc plate to the other side, such as the flowing direction of the hollow arrow in the figure, gas leakage occurs, and the complete sealing of the butterfly valve in the closed state is ensured.
Therefore, the pressure of the first gas seal area and the pressure of the second gas seal area are larger than the pressure in the valve cavity, and according to the principle that gas diffuses from high pressure to low pressure, the gas in the high pressure gas area diffuses into the valve cavity, and the gas in the low pressure area is unlikely to pass through the high pressure gas area, so that the gas on two sides of the disc plate is completely blocked, the gas is effectively prevented from leaking inwards, and the effect of completely sealing the cut-off butterfly valve is realized.
In addition, because the disc plate is not in direct contact with the inner wall of the annular member, the parts such as the disc plate and the like are not worn, and therefore the parts do not need to be replaced, and the maintenance-free effect is achieved.
If the service life of the cylinder is 300 ten thousand times, the cylinder can be operated once every 2 minutes (24 hours of continuous operation), and can be used for more than 10 years according to 7200 hours per year.
In this embodiment, the small air holes 8 on the annular member 6 have a diameter of 4-6mm, all the small air holes 8 are uniformly arranged on the inner wall of the annular member 6, and the distance between two adjacent small air holes 8 is 35-40mm.
In this embodiment, the thickness of the first sealing area 9 is less than 2mm.
The thickness of the first gas seal area 9 is controlled within 2mm, so that the overflow area of the first gas seal area 9 can be effectively reduced, and the flow rate of high-pressure gas is reduced on the premise of ensuring that the high-pressure gas always flows to the low-pressure area.
In the embodiment of the present invention, the width×thickness of the annular member 6 is: 80X 50mm.
The annular member 6 serves to deliver a high pressure air flow uniformly to all the small air holes 8, and its cross-sectional area must be greater than the sum of the areas of all the small air holes 8, so as to ensure that the pressure in the first air seal area 9 and the second air seal area 10 is always higher than that in both sides of the disk 3.
In the embodiment of the invention, the width of the outer edge of the dish plate 3 is the same as the width of the annular member 6.
In the present invention, the outer edge of the plate 3 must have a certain width, which directly determines the sealing capability of the first sealing area 9, and thus the sealing effect of both sides of the plate 3. The width of the outer edge of the disc plate 3 is the same as the width of the annular member 6, so that the area of the first air sealing area 9 is maximized, the sealing capability of the first air sealing area 9 is maximized, and the sealing effect of the two sides of the disc plate 3 is optimized.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained: according to the maintenance-free full-sealed cut-off butterfly valve provided by the embodiment of the invention, the first air sealing area is arranged in the area between the inner wall of the annular component and the outer edge of the disc plate, the second air sealing area is arranged in the area between the inner holes at the two ends of the valve body and the valve rod, high air pressure is formed in the first air sealing area and the second air sealing area, the principle that air flows from the high pressure area to the low pressure area is utilized, the high air in the first air sealing area and the second air sealing area flows to the low pressure area (the areas at the two sides of the disc plate) at the two sides of the air sealing area, so that leakage of air from one side of the disc plate to the other side is avoided, sealing of the valve is realized, and in addition, the disc plate and the inner wall of the annular component are not in direct contact, so that parts such as the disc plate cannot be worn, the parts do not need to be replaced, and maintenance-free effect is achieved.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which is also intended to be covered by the present invention.
Claims (3)
1. The maintenance-free full-sealed cut-off butterfly valve is characterized by comprising a valve body, a valve rod, a disc plate and an annular member, wherein a valve cavity penetrating through the valve body is arranged in the valve body, the valve rod is arranged on the valve body, one end of the valve rod is fixed in an inner hole at one end of the valve body, the other end of the valve rod penetrates through the inner hole at the other end of the valve body to be connected with a rotating shaft of a driving device, and the disc plate is fixedly connected with the valve rod and can rotate around the valve rod in the valve cavity;
the annular member is arranged on the inner wall of the valve body, the axis of the annular member is coincident with the axis of the valve body, the annular member is of a hollow structure surrounded by the inner wall, the outer wall and the two side walls, an external gas connection port is formed in the outer wall, and a plurality of small air holes are formed in the inner wall;
the area between the inner wall of the annular member and the outer edge of the disc plate is set as a first air sealing area, and the area between the inner holes at the two ends of the valve body and the valve rod is set as a second air sealing area;
the external gas enters the annular member through the external gas connecting port, the external gas enters the first gas sealing area and the second gas sealing area through small air holes on the inner wall of the annular member, and the gas pressure entering the first gas sealing area and the second gas sealing area from the small air holes is high, so that high-pressure gas is formed; the gas pressure in the valve cavity is lower than the high-pressure gas and is low-pressure gas;
the high-pressure air of the first air seal area and the second air seal area flows to the two side areas of the disc plate, and the low-pressure air of the two side areas of the disc plate cannot flow to the first air seal area and the second air seal area, so that the butterfly valve is ensured to be completely sealed when in a closed state;
the thickness of the first air sealing area is smaller than 2mm;
the width of the outer edge of the disc plate is the same as the width of the annular member.
2. The maintenance-free full-sealed shut-off butterfly valve according to claim 1, wherein the diameter of the small air holes on the annular member is 4-6mm, all the small air holes are uniformly arranged on the inner wall of the annular member, and the distance between two adjacent small air holes is 35-40mm.
3. The maintenance-free fully sealed shut-off butterfly valve of claim 1, wherein the annular member has a width x thickness of: 80X 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693511.XA CN107246481B (en) | 2017-08-14 | 2017-08-14 | Maintenance-free full-sealed cut-off butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693511.XA CN107246481B (en) | 2017-08-14 | 2017-08-14 | Maintenance-free full-sealed cut-off butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107246481A CN107246481A (en) | 2017-10-13 |
| CN107246481B true CN107246481B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710693511.XA Active CN107246481B (en) | 2017-08-14 | 2017-08-14 | Maintenance-free full-sealed cut-off butterfly valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN107246481B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB782836A (en) * | 1954-10-22 | 1957-09-11 | Glenfield & Kennedy Ltd | Improvements in or relating to butterfly valves |
| CN85200166U (en) * | 1985-04-01 | 1986-01-29 | 中国科学院金属研究所 | Airseal high-temperature stop valve |
| CN202001625U (en) * | 2010-12-04 | 2011-10-05 | 金川集团有限公司 | Gas seal butterfly valve |
| CN202812245U (en) * | 2012-09-27 | 2013-03-20 | 扬州高标机械有限公司 | Elastic gas sealing butterfly valve for waste heat power generation |
| CN203067800U (en) * | 2013-02-06 | 2013-07-17 | 鞍山亨通阀门有限公司 | Sealing device for negative-pressure butterfly valve for recovering converter gas |
| CN106090256A (en) * | 2016-08-17 | 2016-11-09 | 上海开纯洁净室技术工程有限公司 | Floating type pressure reduction confined gas valve |
| CN206268473U (en) * | 2016-12-12 | 2017-06-20 | 江苏大信环境科技有限公司 | A kind of zero leakage sealing gland playing card valve |
| CN207080618U (en) * | 2017-08-14 | 2018-03-09 | 维珂瑞（北京）环境科技有限公司 | A kind of non-maintaining hermetically sealed cut-out butterfly valve |
-
2017
- 2017-08-14 CN CN201710693511.XA patent/CN107246481B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB782836A (en) * | 1954-10-22 | 1957-09-11 | Glenfield & Kennedy Ltd | Improvements in or relating to butterfly valves |
| CN85200166U (en) * | 1985-04-01 | 1986-01-29 | 中国科学院金属研究所 | Airseal high-temperature stop valve |
| CN202001625U (en) * | 2010-12-04 | 2011-10-05 | 金川集团有限公司 | Gas seal butterfly valve |
| CN202812245U (en) * | 2012-09-27 | 2013-03-20 | 扬州高标机械有限公司 | Elastic gas sealing butterfly valve for waste heat power generation |
| CN203067800U (en) * | 2013-02-06 | 2013-07-17 | 鞍山亨通阀门有限公司 | Sealing device for negative-pressure butterfly valve for recovering converter gas |
| CN106090256A (en) * | 2016-08-17 | 2016-11-09 | 上海开纯洁净室技术工程有限公司 | Floating type pressure reduction confined gas valve |
| CN206268473U (en) * | 2016-12-12 | 2017-06-20 | 江苏大信环境科技有限公司 | A kind of zero leakage sealing gland playing card valve |
| CN207080618U (en) * | 2017-08-14 | 2018-03-09 | 维珂瑞（北京）环境科技有限公司 | A kind of non-maintaining hermetically sealed cut-out butterfly valve |
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| CN107246481A (en) | 2017-10-13 |
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