CN212616369U - Eccentric butterfly valve - Google Patents
Eccentric butterfly valve Download PDFInfo
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- CN212616369U CN212616369U CN202020982602.2U CN202020982602U CN212616369U CN 212616369 U CN212616369 U CN 212616369U CN 202020982602 U CN202020982602 U CN 202020982602U CN 212616369 U CN212616369 U CN 212616369U
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- flow passage
- butterfly
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Abstract
The utility model discloses an eccentric butterfly valve, include: the valve body is provided with a flow passage, and a first sealing matching part is arranged inside the flow passage; the valve rod is rotatably arranged; the butterfly plate component comprises a second sealing matching part matched with the first sealing matching part for sealing and a fixed connection ring connected with the second sealing matching part, and the valve rod penetrates through the fixed connection ring; the center of the fixing ring is not coincident with the axial axis of the flow passage, and the center of the fixing ring is not coincident with the radial axis of the first sealing matching part; the inner wall of the upper part of the first seal matching part is parallel to the axial axis of the flow passage, and an inclination angle is formed between the inner wall of the lower part of the first seal matching part and the axial axis of the flow passage. The utility model discloses a sealed form of oblique circular cone three eccentricities makes the first sealed cooperation portion and the sealed cooperation portion of second of eccentric butterfly valve break away from completely in the whole switch stroke of valve, does not have the friction between the sealed cooperation portion of first sealed cooperation portion and second to the possibility of eliminating wearing and tearing and leaking.
Description
Technical Field
The utility model relates to a technical field of valve especially relates to an eccentric butterfly valve.
Background
The butterfly valve is a regulating valve with simple structure, mainly comprises a valve body, a valve rod, a butterfly plate and the like, and the valve rod drives a bottom plate to rotate, so that the functions of opening and closing and regulating the valve are achieved, and the butterfly valve mainly plays the roles of cutting off and throttling on a pipeline. The butterfly valve has the characteristics of simple structure, small volume, light weight, material consumption saving, 90-degree reciprocating rotation, small driving moment and the like, and meanwhile, the streamlined design of the butterfly plate ensures that the fluid resistance loss is small, so that the butterfly valve is an energy-saving product. It is used as a component for realizing the on-off and flow control of a pipeline system, and has been widely applied in many fields of petroleum, chemical industry, metallurgy, hydropower and the like.
However, due to the structural characteristics of the butterfly valve and the limitations of the design and manufacturing level, the precision of the matching between the valve body and the butterfly plate is low, and the sealing performance is difficult to ensure. Meanwhile, the butterfly plate and the valve seat are always in an extrusion and scraping state, so that the butterfly plate is large in resistance distance and quick in abrasion.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an eccentric butterfly valve.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
an eccentric butterfly valve, comprising:
the valve body is provided with a flow passage, and a first sealing matching part is arranged inside the flow passage;
a valve stem rotatably disposed with an axial direction of the valve stem intersecting the flow passage;
the butterfly plate assembly comprises a second sealing matching part matched with the first sealing matching part for sealing and a fixing ring connected with the second sealing matching part, and the valve rod penetrates through the fixing ring;
wherein the center of the fastening ring does not coincide with the axial axis of the flow passage, and the center of the fastening ring does not coincide with the radial axis of the first seal matching part;
one of the inner wall of the upper portion of the first seal fitting portion and the inner wall of the lower portion thereof is parallel to the axial axis of the flow passage, and the other of the inner wall of the upper portion of the first seal fitting portion and the inner wall of the lower portion thereof has an inclination angle with the axial axis of the flow passage.
In the above eccentric butterfly valve, the first seal engagement portion is an annular seal end boss extending from an inner wall of the flow passage to an axial line of the flow passage.
In the above eccentric butterfly valve, the sealing end boss has an annular boss inner wall, the boss inner wall is in a tapered cone shape, the boss inner wall has at least one first bus parallel to an axial axis of the flow channel, and the boss inner wall has at least one second bus having an inclination angle with the axial axis of the flow channel.
The above eccentric butterfly valve, wherein the second seal engagement portion comprises: the butterfly plate comprises a butterfly plate main body, a butterfly plate pressing plate fixedly connected with the butterfly plate main body, and a sealing gasket arranged between the butterfly plate main body and the butterfly plate pressing plate, wherein the fixing and connecting ring is connected with the butterfly plate main body.
Foretell eccentric butterfly valve, wherein, the butterfly plate main part sealed pad with the surface of butterfly plate clamp plate all is oblique circular cone type, wherein, the butterfly plate main part with the shape and the size of the outer peripheral face of butterfly plate clamp plate all with the shape and the size phase-match of boss inner wall, the shape of the outer peripheral face of sealed pad with the shape phase-match of boss inner wall, the size of the outer peripheral wall of sealed pad is greater than the size of boss inner wall.
The eccentric butterfly valve is characterized in that a gland, a supporting seat, the valve body and an end cover are sequentially arranged, and the valve rod sequentially penetrates through the gland, the supporting seat, the valve body and the fixing ring and abuts against the end cover.
The above eccentric butterfly valve, wherein, still include: the hand wheel is connected with the turbine assembly, the turbine assembly is connected with the valve rod, the hand wheel is used for inputting power, and the turbine assembly is used for converting the power input by the hand wheel into the rotation of the valve rod.
In the above eccentric butterfly valve, a first gasket is arranged between the valve rod and the inner wall of the valve body.
The above eccentric butterfly valve, wherein, still include: the fixing block is arranged inside the gland, and the lower end of the fixing block penetrates through the supporting seat and abuts against the first gasket.
In the above eccentric butterfly valve, a second gasket is provided between the valve body and the end cover.
The utility model discloses owing to adopted above-mentioned technique, make it compare the positive effect that has with prior art and be:
(1) the utility model discloses a sealed form of oblique circular cone three eccentricities makes the first sealed cooperation portion and the sealed cooperation portion of second of eccentric butterfly valve break away from completely in the whole switch stroke of valve, does not have the friction between the sealed cooperation portion of first sealed cooperation portion and second to the possibility of eliminating wearing and tearing and leaking.
(2) The utility model discloses a setting up first gasket and second gasket and further having improved the sealing performance of valve.
Drawings
Fig. 1 is a schematic view of the eccentric butterfly valve of the present invention.
Fig. 2 is a schematic sectional view of the eccentric butterfly valve of the present invention.
Fig. 3 is a schematic view of the valve body of the eccentric butterfly valve of the present invention.
Fig. 4 is a schematic diagram of a butterfly plate assembly of the eccentric butterfly valve of the present invention.
Fig. 5 is an enlarged view of the I portion of the eccentric butterfly valve of the present invention.
In the drawings: 1. a valve body; 11. a flow channel; 111. an inlet end; 112. an outlet end; 12. sealing the end boss; 2. a valve stem; 3. a butterfly plate assembly; 31. fixing a connecting ring; 32. a butterfly plate body; 321. a first disc-shaped structure portion; 322. a second disc-like structure portion; 323. a third columnar structure portion; 33. a butterfly plate pressing plate; 34. a gasket; 4. a gland; 5. a supporting seat; 6. an end cap; 7. a hand wheel; 8. a turbine assembly; 9. a fixed block; 101. a first gasket; 102. a second gasket.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Fig. 1 is the schematic diagram of the eccentric butterfly valve of the present invention, fig. 2 is the a-a sectional schematic diagram of the eccentric butterfly valve of the present invention, fig. 3 is the schematic diagram of the valve body of the eccentric butterfly valve of the present invention, fig. 4 is the schematic diagram of the butterfly plate assembly of the eccentric butterfly valve of the present invention, fig. 5 is the I-portion enlarged view of the eccentric butterfly valve of the present invention, please refer to fig. 1 to 5, showing an eccentric butterfly valve of a preferred embodiment, including: the valve comprises a valve body 1 and a valve rod 2, wherein the valve body 1 is provided with a flow passage 11, the flow passage 11 is provided with an inlet end 111 and an outlet end 112, a first sealing matching part is arranged inside the flow passage 11, the valve rod 2 is rotatably arranged, and the axial direction of the valve rod 2 is intersected with the flow passage 11. In this embodiment, fig. 1 shows a state in which the stem 2 is substantially perpendicular to the flow channel 11 in a plan view of the eccentric butterfly valve.
Further, as a preferred embodiment, the eccentric butterfly valve further includes: butterfly plate subassembly 3, butterfly plate subassembly 3 include with the cooperation of first sealed cooperation portion with sealed second sealed cooperation portion and with the rigid coupling ring 31 that the sealed cooperation portion of second is connected, valve rod 2 run through rigid coupling ring 31 and with rigid coupling ring 31 fixed connection, through the rotation of valve rod 2 drive butterfly plate subassembly 3 the rotation in order to realize opening and close of valve.
Further, as a preferred embodiment, the center of the fastening ring 31 does not coincide with the axial axis of the runner 11, and the center of the fastening ring 31 does not coincide with the radial axis of the first seal engagement portion.
Fig. 2 is a schematic sectional view of the eccentric butterfly valve according to the present invention, and fig. 2 shows a side view of the eccentric butterfly valve.
Specifically, referring to fig. 2, an axial axis of the flow passage 11 refers to a central axis of the flow passage 11 in the horizontal direction in fig. 2, and an offset a is provided between the center of the fastening ring 31 and the central axis of the flow passage 11 in the horizontal direction in fig. 2.
Likewise, the radial axis of the first sealing engagement portion refers to the central axis in the vertical direction in fig. 2, and the center of the fastening ring 31 and the first sealing engagement portion have an offset b from each other in the vertical direction in fig. 2.
Further, as a preferred embodiment, one of the inner wall of the upper portion of the first seal engagement portion and the inner wall of the lower portion thereof is parallel to the axial axis of the flow passage 11, and the other of the inner wall of the upper portion of the first seal engagement portion and the inner wall of the lower portion thereof has an inclination angle with respect to the axial axis of the flow passage 11.
Specifically, as shown in fig. 2, the inner wall of the first seal-fitting portion (e.g., a seal end boss 12 described below) at the upper end in fig. 2 is disposed horizontally, i.e., the inner wall at the upper end is parallel to the axial axis of the flow channel 11; the inner wall of the lower end of the first seal-fitting portion is disposed obliquely, i.e., the inner wall of the lower end thereof has an inclination angle c with respect to the axial axis of the flow channel 11.
The offset a, the offset b and the inclination angle c form a sealing form of an inclined cone triple offset, and by adopting the sealing form, a first sealing matching part (such as a sealing boss end 12 described below) and a second sealing matching part (such as a sealing gasket 34 described below) of the eccentric butterfly valve can be completely separated in the whole opening and closing stroke of the valve, and no friction exists between the first sealing matching part and the second sealing matching part, so that the possibility of abrasion and leakage is eliminated.
Further, as a preferred embodiment, the first seal engagement portion is an annular seal end boss 12 extending from the inner wall of the flow passage 11 to an axial line of the flow passage 11.
Further, as a preferred embodiment, the sealing end boss 12 has an annular boss inner wall, the boss inner wall is in a tapered conical shape, the boss inner wall has at least one first generatrix parallel to the axial axis of the flow channel, and the boss inner wall has at least one second generatrix inclined at an angle to the axial axis of the flow channel.
Further, as a preferred embodiment, the inner wall of the boss has only one first generatrix parallel to the axial axis of the flow channel, and the inner wall of the boss has only one second generatrix inclined at an angle to the axial axis of the flow channel.
Further, as a preferred embodiment, an included angle between a third generatrix of the inner wall of the boss except the first generatrix and the second generatrix and an axial axis of the flow channel is greater than zero and smaller than the above-mentioned inclination angle.
Preferably, as a preferred embodiment, the inner circumference of the boss inner wall transitions uniformly from the first generatrix to the second generatrix. In other words, the angle between the third generatrix of the inner circumference of the boss inner wall from the first generatrix to the second generatrix and the axial axis of the flow channel is uniformly changed.
Further, as a preferred embodiment, the second seal engagement portion includes: the butterfly plate comprises a butterfly plate main body 32, a butterfly plate pressing plate 33 fixedly connected with the butterfly plate main body 32, and a sealing gasket 34 arranged between the butterfly plate main body 32 and the butterfly plate pressing plate 33, wherein the fixing ring 31 is connected with the butterfly plate main body 32.
Further, as a preferred embodiment, the outer surfaces of the butterfly plate main body 32, the sealing gasket 34 and the butterfly plate pressing plate 33 are all in an oblique conical shape, wherein the shapes and the sizes of the outer peripheral surfaces of the butterfly plate main body 32 and the butterfly plate pressing plate 33 are all matched with the shapes and the sizes of the inner walls of the bosses, the shapes of the outer peripheral surfaces of the sealing gasket 34 are matched with the shapes of the inner walls of the bosses, and the size of the outer peripheral wall of the sealing gasket 34 is larger than the size of the inner walls of the bosses. The peripheral wall of the gasket 34 is deformed by a force, and is tightly attached to the seal end boss 12, thereby performing a sealing function.
In a preferred embodiment, the butterfly plate body 32 includes a first disc-shaped structure portion 321, a second disc-shaped structure portion 322, and a third cylindrical structure portion 323 integrally connected in this order, wherein the first disc-shaped structure portion 321 has a larger diameter than the second disc-shaped structure portion 322, and the second disc-shaped structure portion 322 has a larger diameter than the third cylindrical structure portion 323. The fastening ring is connected to the other surface of the first disc-shaped structure portion 321 opposite to the second disc-shaped structure portion 322.
In a preferred embodiment, the butterfly plate pressing plate 33 is of a ring structure, the butterfly plate pressing plate 33 is sleeved on the third column-shaped structure portion 323 to form a positioning, and the outer edge of the butterfly plate pressing plate 33 borders the outer edge of the second disc-shaped structure portion 322 to form a shape and a size matched with the inner wall of the boss. A groove is formed between the butterfly plate presser 33 and the second disc-shaped structure portion 322, and the annular packing 34 is accommodated and held in the groove.
In a preferred embodiment, the butterfly plate pressure plate 33 is connected to the butterfly plate body 32 by bolts.
The above description is only an example of the preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.
The utility model discloses still have following embodiment on above-mentioned basis:
the utility model discloses a in the further embodiment, be equipped with gland 4, supporting seat 5, valve body 1 and end cover 6 in proper order, valve rod 2 runs through gland 4, supporting seat 5, valve body 1, solid ring 31 in proper order and supports in end cover 6.
The utility model discloses a further embodiment, still include: hand wheel 7 and turbine module 8, hand wheel 7 is connected with turbine module 8, and turbine module 8 is connected with valve rod 2, and wherein, hand wheel 7 is used for the input power, and turbine module 8 is used for turning into the rotation of valve rod 2 with the power of hand wheel 7 input. In the present embodiment, the turbine assembly 8 converts rotation of the handwheel 7 in a direction perpendicular to the plane of the paper in fig. 1 into rotation of the valve stem 2 in a vertical direction in fig. 1. The turbine assembly 8 can be any gear box, when the axis of rotation of the hand wheel 7 is not parallel to the axis of rotation of the valve rod 2, the turbine assembly 8 should have a reversing function, and when the axis of rotation of the hand wheel 7 is parallel to the axis of rotation of the valve rod 2, the turbine assembly 8 can only have a transmission function.
The utility model discloses a further embodiment is equipped with first gasket 101 between the inner wall of valve rod 2 and valve body 1. Preferably, as shown in fig. 5, the upper portion of the valve body 1 has a groove for receiving the first gasket 101, and the first gasket 101 is disposed in the groove to prevent the fluid from overflowing from a gap between the valve stem 2 and the valve body 1.
The utility model discloses a further embodiment, still include: fixed block 9, inside gland 4 is located to fixed block 9, and the lower extreme of fixed block 9 runs through supporting seat 5 and supports in first gasket 101, compresses tightly first gasket 101 through fixed block 9.
In a further embodiment of the present invention, a second gasket 102 is disposed between the valve body 1 and the end cover 6.
The sealing performance of the valve is further improved by providing the first gasket 101 and the second gasket 102.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (10)
1. An eccentric butterfly valve, comprising:
the valve body is provided with a flow passage, and a first sealing matching part is arranged inside the flow passage;
a valve stem rotatably disposed with an axial direction of the valve stem intersecting the flow passage;
the butterfly plate assembly comprises a second sealing matching part matched with the first sealing matching part for sealing and a fixing ring connected with the second sealing matching part, and the valve rod penetrates through the fixing ring;
wherein the center of the fastening ring does not coincide with the axial axis of the flow passage, and the center of the fastening ring does not coincide with the radial axis of the first seal matching part;
one of the inner wall of the upper portion of the first seal fitting portion and the inner wall of the lower portion thereof is parallel to the axial axis of the flow passage, and the other of the inner wall of the upper portion of the first seal fitting portion and the inner wall of the lower portion thereof has an inclination angle with the axial axis of the flow passage.
2. The eccentric butterfly valve of claim 1, wherein the first seal engagement portion is an annular seal end boss extending from an inner wall of the flow passage to an axial axis of the flow passage.
3. The eccentric butterfly valve of claim 2, wherein the seal end boss has an annular boss inner wall, the boss inner wall having a tapered conical shape, the boss inner wall having at least one first generatrix parallel to an axial axis of the flow passage, the boss inner wall having at least one second generatrix at the oblique angle to the axial axis of the flow passage.
4. The eccentric butterfly valve of claim 3, wherein the second seal engagement portion comprises: the butterfly plate comprises a butterfly plate main body, a butterfly plate pressing plate fixedly connected with the butterfly plate main body, and a sealing gasket arranged between the butterfly plate main body and the butterfly plate pressing plate, wherein the fixing and connecting ring is connected with the butterfly plate main body.
5. The eccentric butterfly valve of claim 4, wherein the outer surfaces of the butterfly body, the seal gasket, and the butterfly pressure plate are all in the shape of an oblique cone, wherein the outer peripheral surfaces of the butterfly body and the butterfly pressure plate are all in the shape and size matching the shape and size of the boss inner wall, the outer peripheral surface of the seal gasket is in the shape matching the shape of the boss inner wall, and the outer peripheral wall of the seal gasket is larger than the boss inner wall.
6. The eccentric butterfly valve of claim 1, wherein a gland, a support seat, the valve body, and an end cap are provided in sequence, and the valve stem penetrates the gland, the support seat, the valve body, the fastening ring, and abuts against the end cap in sequence.
7. The eccentric butterfly valve of claim 1, further comprising: the hand wheel is connected with the turbine assembly, the turbine assembly is connected with the valve rod, the hand wheel is used for inputting power, and the turbine assembly is used for converting the power input by the hand wheel into the rotation of the valve rod.
8. The eccentric butterfly valve of claim 6, wherein a first gasket is disposed between the valve stem and an inner wall of the valve body.
9. The eccentric butterfly valve of claim 8, further comprising: the fixing block is arranged inside the gland, and the lower end of the fixing block penetrates through the supporting seat and abuts against the first gasket.
10. The eccentric butterfly valve of claim 6, wherein a second gasket is disposed between the valve body and the end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020982602.2U CN212616369U (en) | 2020-06-02 | 2020-06-02 | Eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020982602.2U CN212616369U (en) | 2020-06-02 | 2020-06-02 | Eccentric butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212616369U true CN212616369U (en) | 2021-02-26 |
Family
ID=74721322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020982602.2U Active CN212616369U (en) | 2020-06-02 | 2020-06-02 | Eccentric butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212616369U (en) |
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2020
- 2020-06-02 CN CN202020982602.2U patent/CN212616369U/en active Active
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