CN113757397A - Six-eccentric bidirectional sealing butterfly valve - Google Patents
Six-eccentric bidirectional sealing butterfly valve Download PDFInfo
- Publication number
- CN113757397A CN113757397A CN202111176465.9A CN202111176465A CN113757397A CN 113757397 A CN113757397 A CN 113757397A CN 202111176465 A CN202111176465 A CN 202111176465A CN 113757397 A CN113757397 A CN 113757397A
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- Prior art keywords
- valve
- auxiliary
- sealing ring
- main
- 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
- F16K1/2261—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
- F16K1/2268—Sealing means for the axis of rotation
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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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- 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
- F16K1/44—Details of seats or valve members of double-seat 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
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
- F16K1/487—Attaching valve members to screw-spindles by a fixing element extending in the axial direction of the spindle, e.g. a screw
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a six-eccentric bidirectional sealing butterfly valve which comprises a valve body, a butterfly plate, a valve rod, a main valve seat, an auxiliary valve seat, a main sealing ring, a pressing ring and an auxiliary sealing ring. By adopting a six-eccentric structure and the combined action of double sealing pairs, the reverse sealing is realized to reach 1.1 times of nominal pressure, the thickening of a valve rod and a butterfly plate is not needed, the model of an actuating mechanism is not needed, and the cost is greatly reduced. The fixed valve seat is adopted, the movable valve seat is not adopted, the phenomenon of clamping stagnation of the movable valve seat does not exist, and the problem of unstable reverse sealing performance is fundamentally solved. The inner structure is not provided with a rubber O-shaped ring, and can resist the high temperature of more than 425 ℃. The main sealing pair and the auxiliary sealing pair are sealed by conical surfaces, so that the sealing pairs do not interfere when opened and closed, and the opening and closing torque is small.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a six-eccentric bidirectional sealing butterfly valve. The pipeline cutting device is used for cutting and adjusting pipeline systems in sewage, petroleum, chemical industry, pharmacy, electric power industry and the like, and the medium is water, oil, steam, a chemical medium and the like. The double-sealing-ring high-pressure double-seal pipeline is widely used for pipelines with severe working conditions of high temperature, low temperature, high pressure, high wear resistance, high corrosion, high vacuum and the like which are required by bidirectional sealing.
Background
The defects of the similar products in the current market are as follows:
the first problem is that: the single fixed valve seat can not reach reverse sealing, especially the reverse leakage amount of specifications above DN400 is larger, if the reverse sealing pressure is not high, a thickening valve rod and a butterfly plate can be adopted for thickening, an increasing executing mechanism is used for realizing the thickening, but the valve cost is increased a lot, and the reverse sealing can only reach 0.6 times of nominal pressure.
The second problem is that: the conventional bidirectional sealing utilizes an independent movable valve seat, and when the bidirectional sealing is carried out, the movable valve seat is pushed to move towards the butterfly plate sealing ring, so that the bidirectional sealing is realized. When the medium is not clean, the clamping stagnation phenomenon is easy to occur, and the reverse sealing performance is unstable.
The third problem is that: because the internal structure of the movable valve seat is provided with the rubber O-ring, the material can be used below 250 degrees.
Disclosure of Invention
The invention aims to provide a six-eccentric center bidirectional sealing butterfly valve aiming at the defects of the prior art.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a six-eccentric two-way sealing butterfly valve comprises a valve body, a butterfly plate, a valve rod, a main valve seat, an auxiliary valve seat, a main sealing ring, a pressing ring and an auxiliary sealing ring, wherein the butterfly plate is positioned in the valve body, the valve rod is fixedly connected with the butterfly plate, the two ends of the valve rod are in running fit with the valve body, the main valve seat and the auxiliary valve seat are positioned at the two sides of the valve rod, one side of the butterfly plate is provided with an annular concave table, the main sealing ring is arranged in the annular concave table, the pressing ring is pressed on the main sealing ring and is arranged on the butterfly plate through a bolt, the main valve seat is matched with the main sealing ring to form a main sealing pair, the auxiliary sealing ring is arranged between the butterfly plate and the auxiliary valve seat, the auxiliary valve seat is matched with the auxiliary sealing ring to form an auxiliary sealing pair, the symmetrical central line of the main sealing ring and the eccentric center line of the valve rod form a first eccentric center line, the flow channel central line of the valve body and the eccentric center line of the valve rod form a second eccentric center line b, the center line of a cone formed by the sealing surface of the main sealing ring and the center line of a flow channel of the valve body are eccentrically arranged to form a third eccentricity c, the center line of the butterfly plate on one side of the main sealing ring and the center line of the flow channel of the valve body are eccentrically arranged to form a fourth eccentricity d, the rotation center line of the valve rod and the axis of the auxiliary sealing ring are eccentrically arranged to form a fifth eccentricity e, and the symmetry center line of the auxiliary sealing ring and the rotation center line of the valve rod are eccentrically arranged to form a sixth eccentricity f.
The further technical scheme is that the main sealing pair and the auxiliary sealing pair are sealed by conical surfaces.
According to a further technical scheme, the main valve seat is welded on an annular boss on the inner side of the valve body in an overlaying mode.
According to a further technical scheme, an auxiliary valve seat of the auxiliary sealing pair is welded on the valve body, and the auxiliary sealing ring is a self-turning sealing surface on the butterfly plate or is welded on the butterfly plate by adopting an independent piece.
The further technical scheme is that the matching surface of the auxiliary valve seat and the auxiliary sealing ring is hardened by adopting chromium plating or nitriding treatment.
The valve rod comprises an upper valve shaft and a lower valve shaft, the upper valve shaft is connected with a butterfly plate through a pin shaft, an upper shaft hole and a lower shaft hole are formed in the valve body, an upper shaft sleeve is arranged in the upper shaft hole, a lower shaft sleeve is arranged in the lower shaft hole, the upper valve shaft is inserted into the upper shaft sleeve, a stuffing box is arranged at the upper end of the upper shaft hole, stuffing and a stuffing pad are arranged in the stuffing box, a stuffing gland is arranged above the stuffing box, the lower valve shaft is inserted into the lower shaft sleeve, the end part of the lower shaft hole is blocked through an end cover, a gasket is arranged between the end cover and the valve body, an adjusting pad is arranged between the end cover and the lower valve shaft, and a semi-open ring is arranged between the lower valve shaft and the valve body.
The valve further comprises a support, wherein one end of the support is connected with the valve body, and the other end of the support is used for being connected with an external valve actuating mechanism.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the six-eccentric bidirectional sealing butterfly valve adopts a six-eccentric structure, adopts the combined action of double sealing pairs, realizes reverse sealing to reach 1.1 times of nominal pressure, does not need thickening a valve rod and a butterfly plate, does not need increasing the type of an actuating mechanism, and greatly reduces the cost. The fixed valve seat is adopted, the movable valve seat is not adopted, the phenomenon of clamping stagnation of the movable valve seat does not exist, and the problem of unstable reverse sealing performance is fundamentally solved. The inner structure is not provided with a rubber O-shaped ring, and can resist the high temperature of more than 425 ℃. The main sealing pair and the auxiliary sealing pair are sealed by conical surfaces, so that the sealing pairs do not interfere when opened and closed, and the opening and closing torque is small.
Drawings
FIG. 1 is a radial cross-sectional view of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an axial cross-sectional view of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3;
fig. 5 is a partially enlarged view of another portion of fig. 3.
In the figure: 1. a valve body; 2. a main valve seat; 3. a primary seal ring; 4. a butterfly plate; 5. pressing a ring; 6. an adjustment pad; 7. an end cap; 8. a gasket; 9. semi-open loop; 10. a pin shaft; 11. a lower valve shaft; 12. an upper valve shaft; 13. an upper shaft sleeve; 14. a filler pad; 15. a filler; 16. a support; 17. a packing gland; 18. a secondary valve seat; 19. a secondary seal ring; 20. and a lower shaft sleeve.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1-5, a six-eccentric two-way sealing butterfly valve includes a valve body 1, a butterfly plate 4, a valve rod, a main valve seat 2, an auxiliary valve seat 18, a main sealing ring 3, a pressing ring 5 and an auxiliary sealing ring 19, wherein the butterfly plate 4 is located in the valve body 1, the valve rod is fixedly connected with the butterfly plate 4, two ends of the valve rod are rotatably fitted with the valve body 1, the main valve seat 2 and the auxiliary valve seat 18 are located at two sides of the valve rod, an annular concave table is arranged at one side of the butterfly plate 4, the main sealing ring 3 is arranged in the annular concave table, the pressing ring 5 is pressed on the main sealing ring 3 and is mounted on the butterfly plate 4 through a bolt, the main valve seat 2 and the main sealing ring 3 are fitted to form a main sealing pair, the auxiliary sealing ring 19 is arranged between the butterfly plate 4 and the auxiliary valve seat 18, the auxiliary valve seat 18 and the auxiliary sealing ring 19 are fitted to form an auxiliary sealing pair, a symmetrical center line of the main sealing ring 3 and a rotation center line of the valve rod are eccentrically arranged to form a first eccentric center line a first eccentric a, the interference phenomenon between the end surfaces of two shaft ends of the butterfly plate and the valve seat can be eliminated, the center line of the flow channel of the valve body 1 and the rotation center line of the valve rod are eccentrically arranged to form a second eccentric b, the sealing pair is separated quickly when the valve is opened, the opening and closing torque is reduced, the center line of a cone formed by the sealing surface of the main sealing ring 3 and the center line of a flow passage of the valve body 1 are eccentrically arranged to form a third eccentricity c, a sealing pair can be quickly separated during opening and closing, the center line of the butterfly plate 4 at one side of the main seal ring 3 and the center line of the flow passage of the valve body 1 are eccentrically arranged to form a fourth eccentricity d, the processing efficiency of the butterfly plate is improved, the rotary central line of the valve rod and the axis of the secondary seal ring 19 are eccentrically arranged to form a fifth eccentricity e, so that the reverse sealing performance is improved, the symmetrical center line of the secondary sealing ring 19 and the rotary center line of the valve rod are eccentrically arranged to form a sixth eccentricity f, so that the problem of interference of the secondary sealing pair is solved.
The main sealing pair and the auxiliary sealing pair are sealed by conical surfaces, the sealing pairs do not interfere when opened and closed, and the opening and closing torque is small.
The main valve seat 2 is welded on the annular boss on the inner side of the valve body 1 in an overlaying mode. Specifically, when the main seal ring 3 is a multi-layer stainless steel sandwich structure, the bead weld D507Mo may be adopted. When the sealing pair is made of all metal, STL hard alloy can be adopted for surfacing. And can also be made according to the requirements of customers.
An auxiliary valve seat 18 of the auxiliary sealing pair is welded on the valve body 1, and an auxiliary sealing ring 19 is welded on the butterfly plate 4 by adopting a self-turning sealing surface on the butterfly plate 4 or adopting an independent piece. The matching surfaces of the secondary valve seat 18 and the secondary sealing ring 19 are hardened by adopting chrome plating or nitriding treatment. The stability of the long-term service performance of the bidirectional seal is ensured.
The valve rod comprises an upper valve shaft 12 and a lower valve shaft 11, the upper valve shaft 12 is connected with the butterfly plate 4 through a pin shaft 10, an upper shaft hole and a lower shaft hole are formed in the valve body 1, an upper shaft sleeve 13 is arranged in the upper shaft hole, a lower shaft sleeve 20 is arranged in the lower shaft hole, the upper valve shaft 12 is inserted into the upper shaft sleeve 13, a stuffing box is arranged at the upper end of the upper shaft hole, stuffing 15 and a stuffing pad 14 are arranged in the stuffing box, a stuffing gland 17 is arranged above the stuffing box, the lower valve shaft 11 is inserted into the lower shaft sleeve 20, the end part of the lower shaft hole is plugged through an end cover 7, a gasket 8 is arranged between the end cover 7 and the valve body 1, an adjusting pad 6 is arranged between the end cover 7 and the lower valve shaft 11, and a half-open ring 9 is arranged between the lower valve shaft 11 and the valve body 1.
The valve further comprises a support 16, wherein one end of the support 16 is connected with the valve body 1, and the other end of the support 16 is used for being connected with an external valve actuating mechanism.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a six eccentric two way seal butterfly valves which characterized in that: comprises a valve body (1), a butterfly plate (4), a valve rod, a main valve seat (2), an auxiliary valve seat (18), a main sealing ring (3), a pressing ring (5) and an auxiliary sealing ring (19), wherein the butterfly plate (4) is positioned in the valve body (1), the valve rod is fixedly connected with the butterfly plate (4), two ends of the valve rod are in running fit with the valve body (1), the main valve seat (2) and the auxiliary valve seat (18) are positioned at two sides of the valve rod, one side of the butterfly plate (4) is provided with an annular concave table, the main sealing ring (3) is arranged in the annular concave table, the pressing ring (5) is pressed on the main sealing ring (3) and is arranged on the butterfly plate (4) through bolts, the main valve seat (2) is matched with the main sealing ring (3) to form a main sealing pair, the auxiliary sealing ring (19) is arranged between the butterfly plate (4) and the auxiliary valve seat (18), the auxiliary valve seat (18) is matched with the auxiliary sealing ring (19) to form an auxiliary sealing pair, the valve is characterized in that a symmetrical center line of the main sealing ring (3) and a rotary center line of the valve rod are eccentrically arranged to form a first eccentricity a, a flow channel center line of the valve body (1) and the rotary center line of the valve rod are eccentrically arranged to form a second eccentricity b, a cone center line formed by a sealing surface of the main sealing ring (3) and the flow channel center line of the valve body (1) are eccentrically arranged to form a third eccentricity c, a center line of the butterfly plate (4) on one side of the main sealing ring (3) and the flow channel center line of the valve body (1) are eccentrically arranged to form a fourth eccentricity d, the rotary center line of the valve rod and an axis of the auxiliary sealing ring (19) are eccentrically arranged to form a fifth eccentricity e, and a symmetrical center line of the auxiliary sealing ring (19) and the rotary center line of the valve rod are eccentrically arranged to form a sixth eccentricity f.
2. A six-eccentric center double seal butterfly valve according to claim 1, wherein: the main sealing pair and the auxiliary sealing pair are sealed by conical surfaces.
3. A six-eccentric center double seal butterfly valve according to claim 1, wherein: the main valve seat (2) is welded on the annular boss on the inner side of the valve body (1) in an overlaying mode.
4. A six-eccentric center double seal butterfly valve according to claim 1, wherein: an auxiliary valve seat (18) of the auxiliary sealing pair is welded on the valve body (1), and an auxiliary sealing ring (19) is welded on the butterfly plate (4) through a self-turning sealing surface on the butterfly plate (4) or through an independent piece.
5. The six-eccentric center two-way seal butterfly valve of claim 4, wherein: and the matching surfaces of the auxiliary valve seat (18) and the auxiliary sealing ring (19) are hardened by adopting chromium plating or nitriding treatment.
6. A six-eccentric center double seal butterfly valve according to claim 1, wherein: the valve rod comprises an upper valve shaft (12) and a lower valve shaft (11), the upper valve shaft (12) is connected with the butterfly plate (4) through a pin shaft (10), an upper shaft hole and a lower shaft hole are arranged in the valve body (1), an upper shaft sleeve (13) is arranged in the upper shaft hole, a lower shaft sleeve (20) is arranged in the lower shaft hole, the upper valve shaft (12) is inserted into the upper shaft sleeve (13), the upper end of the upper shaft hole is provided with a stuffing box, a stuffing (15) and a stuffing pad (14) are arranged in the stuffing box, a packing gland (17) is arranged above the packing box, the lower valve shaft (11) is inserted into the lower shaft sleeve (20), the end part of the lower shaft hole is sealed by an end cover (7), a gasket (8) is arranged between the end cover (7) and the valve body (1), an adjusting pad (6) is arranged between the end cover (7) and the lower valve shaft (11), a semi-open ring (9) is arranged between the lower valve shaft (11) and the valve body (1).
7. A six-eccentric center double seal butterfly valve according to claim 1, wherein: the valve is characterized by further comprising a support (16), wherein one end of the support (16) is connected with the valve body (1), and the other end of the support (16) is used for being connected with an external valve actuating mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111176465.9A CN113757397A (en) | 2021-10-09 | 2021-10-09 | Six-eccentric bidirectional sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111176465.9A CN113757397A (en) | 2021-10-09 | 2021-10-09 | Six-eccentric bidirectional sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113757397A true CN113757397A (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111176465.9A Pending CN113757397A (en) | 2021-10-09 | 2021-10-09 | Six-eccentric bidirectional sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113757397A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704652A (en) * | 2022-05-05 | 2022-07-05 | 德科隆（无锡）流体控制有限公司 | Six-dimensional eccentric valve sealing structure |
-
2021
- 2021-10-09 CN CN202111176465.9A patent/CN113757397A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704652A (en) * | 2022-05-05 | 2022-07-05 | 德科隆（无锡）流体控制有限公司 | Six-dimensional eccentric valve sealing structure |
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