CN220870108U - Butterfly valve seal structure and butterfly valve - Google Patents
Butterfly valve seal structure and butterfly valve Download PDFInfo
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- CN220870108U CN220870108U CN202322719078.6U CN202322719078U CN220870108U CN 220870108 U CN220870108 U CN 220870108U CN 202322719078 U CN202322719078 U CN 202322719078U CN 220870108 U CN220870108 U CN 220870108U
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- 238000007789 sealing Methods 0.000 claims abstract description 190
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 238000001125 extrusion Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 8
- 230000001154 acute effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The application relates to the field of butterfly valve sealing, in particular to a butterfly valve sealing structure, which comprises: a valve body; the annular sealing channel is formed in the valve body and comprises a left half sealing channel and a right half sealing channel which are connected with each other; the valve rod is rotationally connected to the valve body; the butterfly plate is fixed on the valve rod; the sealing ring is sleeved on the butterfly plate; a positive inclination angle is formed between the annular wall of the left half sealing channel and the axis of the annular sealing channel, a negative inclination angle is formed between the annular wall of the right half sealing channel and the axis of the annular sealing channel, and the annular wall of the left half sealing channel faces to the inflow direction of fluid in the valve body. According to the application, the positive inclination angle and the negative inclination angle are arranged on the annular sealing channel, so that the traditional elastic sealing is replaced by torsion sealing when the sealing ring, the butterfly plate and the annular sealing channel are sealed, the sealing effect and the sealing performance of the butterfly valve are greatly improved, the butterfly valve is not easy to leak in the use process, and the safety of the butterfly valve in the use process is improved.
Description
Technical Field
The application relates to the field of butterfly valve sealing, in particular to a butterfly valve sealing structure and a butterfly valve.
Background
The butterfly valve is also called as a flap valve, and is a simple-structure regulating valve, and can be used for on-off control of low-pressure pipeline medium.
The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe is mainly used for cutting and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the valve rod in the valve body, so that the purpose of opening and closing or adjusting is achieved.
In the use process of the traditional butterfly valve, the sealing performance is poor, the traditional butterfly valve cannot achieve reverse full pressure difference sealing, and leakage is easy to occur in the use process.
Disclosure of Invention
In order to improve the sealing effect and sealing performance of the butterfly valve, the application provides the butterfly valve sealing structure and the butterfly valve, wherein the positive inclination angle and the negative inclination angle are arranged on the annular sealing channel, so that the traditional elastic sealing is replaced by torsion sealing when the sealing ring, the butterfly plate and the annular sealing channel are sealed, the sealing effect and the sealing performance of the butterfly valve are greatly improved, the butterfly valve is not easy to leak in the use process, and the safety of the butterfly valve in the use process is improved.
In a first aspect, the present application provides a butterfly valve sealing structure, which adopts the following technical scheme:
a butterfly valve seal structure, comprising:
A valve body;
The annular sealing channel is formed in the valve body and comprises a left half sealing channel and a right half sealing channel which are connected with each other;
the valve rod is rotationally connected to the valve body;
The butterfly plate is fixed on the valve rod; and
The sealing ring is sleeved on the butterfly plate and used for sealing under the extrusion of the butterfly plate and the annular sealing channel;
The left half sealing channel and the right half sealing channel are respectively positioned at two sides of the valve rod axis, a positive inclination angle is formed between the annular wall of the left half sealing channel and the valve body axis, a negative inclination angle is formed between the annular wall of the right half sealing channel and the valve body axis, and the annular wall of the left half sealing channel faces to the inflow direction of fluid in the valve body.
Preferably, a sealing ring is arranged on the inner wall of the annular sealing channel.
Preferably, the angle of the negative inclination angle is smaller than the angle of the positive inclination angle.
Preferably, the positive tilt angle is in the range of 18 degrees to 24 degrees.
Preferably, the negative inclination angle ranges from 1 degree to 4 degrees.
Preferably, the axis of the valve rod is located on the side of the annular sealing channel close to the inflow direction of the fluid in the valve body.
Preferably, the axis of the valve rod is not on the same plane with the axis of the valve body, and the axis of the valve rod is positioned on one side of the axis of the valve body away from the left half sealing channel.
Preferably, the butterfly plate is detachably connected with a fixing plate, the sealing ring is located between the fixing plate and the butterfly plate, and the fixing plate is used for fixing the sealing ring on the butterfly plate.
Preferably, the fixing plate is fixed on the butterfly plate through bolt connection.
In a second aspect, the present application provides a butterfly valve, which adopts the following technical scheme:
a butterfly valve comprises the butterfly valve sealing structure.
In summary, the application has the following beneficial technical effects:
1. According to the application, the positive inclination angle and the negative inclination angle are arranged on the annular sealing channel, so that the traditional elastic sealing is replaced by torsion sealing when the sealing ring, the butterfly plate and the annular sealing channel are sealed, the sealing effect and the sealing performance of the butterfly valve are greatly improved, the butterfly valve is not easy to leak in the use process, and the safety of the butterfly valve in the use process is improved.
2. According to the butterfly valve, the butterfly plate and the sealing ring are used for torsion sealing of the sealing ring, so that the sealing ring and the sealing ring are changed from a circular ring shape to an elliptical ring shape under the torsion action of the butterfly plate, and under the extrusion of the butterfly plate, the traditional sealing by the sealing ring and the sealing ring is changed into the sealing by the sealing ring and the butterfly plate and simultaneously forms sealing with the sealing ring, so that the sealing effect and the sealing performance of the butterfly valve are improved.
3. According to the butterfly valve, the valve rod is subjected to secondary deflection, and then the butterfly plate and the sealing ring are deflected when sealing the sealing ring, so that the butterfly plate and the sealing ring form torsion sealing on the sealing ring, and the sealing effect and the sealing performance of the butterfly valve are improved.
4. According to the butterfly valve, the positive inclination angle and the negative inclination angle are arranged on the annular sealing channel, and the valve rod is secondarily deviated and the butterfly plate is deviated, so that the butterfly plate can well abut against the inner wall of the sealing ring at the left half sealing channel under the pressure of the fluid of a forward medium, the butterfly plate and the sealing ring can well form sealing with the sealing ring, and the sealing effect and the sealing performance of the butterfly valve are improved.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present application.
Fig. 2 is a sectional view taken along the direction A-A in fig. 1 (in which the butterfly plate is in an open state).
Fig. 3 is a view of the butterfly plate of fig. 2 closed.
Reference numerals illustrate: 1. a valve body; 2. an annular seal channel; 21. the left half seals the channel; 22. the right half seals the channel; 3. a valve stem; 4. a butterfly plate; 41. a left half butterfly plate; 42. a right half butterfly plate; 5. a seal ring; 6. a fixing plate; 7. and (3) a sealing ring.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings.
The embodiment of the application discloses a butterfly valve sealing structure.
Referring to fig. 1 to 3, the butterfly valve sealing structure includes a valve body 1, an annular sealing passage 2, a valve stem 3, a butterfly plate 4, a seal ring 5, and a fixing plate 6.
The annular sealing channel 2 is formed on the inner wall of the valve body 1, and the axis of the annular sealing channel 2 is collinear with the axis of the valve body 1.
The valve rod 3 is rotatably connected to the valve body 1, the butterfly plate 4 is fixedly arranged on the valve body 1, and the valve rod 3 drives the butterfly plate 4 to rotate in the valve body 1.
Referring to fig. 1 to 3, the sealing ring 5 is sleeved on the butterfly plate 4, the fixing plate 6 is detachably connected to the butterfly plate 4, the detachable connection includes but is not limited to plugging, clamping, threaded connection and bolting, in this embodiment, the fixing plate 6 is fixed on the butterfly plate 4 through bolting, the sealing ring 5 is located between the fixing plate 6 and the butterfly plate 4, the fixing plate 6 fixedly clamps the sealing ring 5 on the butterfly plate 4, in use, the butterfly plate 4 drives the sealing ring 5 to rotate, and the sealing ring 5 completes sealing of the annular sealing channel 2 under the extrusion of the butterfly plate 4 and the annular sealing channel 2.
Wherein the annular seal channel 2 comprises a left half seal channel 21 and a right half seal channel 22 which are connected with each other, and the left half seal channel 21 and the right half seal channel 22 are respectively positioned at two sides of the axis of the valve rod 3.
The edges of the butterfly plate 4 and the fixed plate 6 are adapted to the inner wall of the annular sealing channel 2, and the butterfly plate 4 and the fixed plate 6 may be divided into a left half and a right half, but in this embodiment, the edges of the butterfly plate 4 and the fixed plate 6 are adapted to the inner wall of the annular sealing channel 2, so that the description thereof will not be repeated here.
Specifically, referring to fig. 1 to 3, a positive inclination angle is formed between the annular wall of the left half seal passage 21 and the axis of the valve body 1, and a negative inclination angle is formed between the annular wall of the right half seal passage 22 and the axis of the valve body 1, wherein the positive inclination angle refers to an acute angle formed between the annular wall of the left half seal passage 21 and the axis of the valve body 1, and the inclination direction of the annular wall of the left half seal passage 21 is directed in the inflow direction of the fluid in the valve body 1, that is, in the forward medium direction of the fluid in the valve body 1, so that the included angle between the annular wall of the left half seal passage 21 and the axis of the valve body 1 is defined as the positive inclination angle. The negative inclination angle refers to an acute angle formed between the annular wall of the right half seal passage 22 and the axis of the valve body 1, and the inclination direction of the annular wall of the right half seal passage 22 is the outflow direction of the fluid flow in the valve body 1, i.e., the reverse medium direction of the fluid in the valve body 1, so that the angle between the annular wall of the right half seal passage 22 and the axis of the valve body 1 is defined as the negative inclination angle.
Thus, the orientation between the positive and negative tilt angles is opposite, and the angle of the negative tilt angle is smaller than the angle of the positive tilt angle. Wherein the positive tilt angle may range between 18 degrees and 24 degrees and the negative tilt angle may range between 1 degree and 4 degrees.
Referring to fig. 1 to 3, in order for the seal ring 5 to seal the annular seal passage 2 better, the axis of the valve stem 3 is located on the side of the annular seal passage 2 close to the inflow direction of the flow in the valve body 1, and the axis of the valve stem 3 is not on the same plane as the axis of the valve body 1, and the axis of the valve stem 3 is located on the side of the axis of the valve body 1 away from the left half seal passage 21, i.e., the axis of the valve stem 3 is located between the axis of the valve body 1 and the annular wall of the right half seal passage 22. That is, the axis of the valve stem 3 is offset in the direction in which the fluid flows in the valve body 1, and the right half seal passage 22 is offset.
Because of the offset of the valve stem 3 inside the valve body 1, neither the left sealing half channel 21 nor the right sealing half channel 22 is half a ring, the left sealing half channel 21 actually occupies a larger ring than half a ring, and the right sealing half channel 22 actually occupies a smaller ring than half a ring, but the left sealing half channel 21 and the right sealing half channel 22 still are bordered by the axis of the valve stem 3, and the left sealing half channel 21 and the right sealing half channel 22 are respectively measured from the axis of the valve stem 3.
Referring to fig. 1 to 3, due to the offset of the valve stem 3 inside the valve body 1, the butterfly plates 4 on both sides of the valve stem 3 are also divided into two parts of uneven size by the valve stem 3, the butterfly plates 4 include a left half butterfly plate 41 larger than half an original and a right half butterfly plate 42 smaller than half a circle, and the left half butterfly plate 41 and the right half butterfly plate 42 can be regarded as rotating shafts of the valve stem 3.
When the valve rod 3 is used, the butterfly plate 4 and the sealing ring 5 are driven to rotate, so that the butterfly plate 4 and the sealing ring 5 seal the annular sealing channel 2, at this time, the left half butterfly plate 41 and the right half butterfly plate 42 are under the acting force of the fluid of the forward medium and the fluid of the reverse medium, and the fluid of the forward medium continuously rotates under the larger pressure because the fluid flows from the fluid of the forward medium to the fluid of the reverse medium, so that the pressure of the fluid of the forward medium to the butterfly plate 4 is larger, and the area of the left half butterfly plate 41 is larger than that of the right half butterfly plate 42 because the left half butterfly plate 41 is larger than that of the right half butterfly plate 42, and as known by the pressure formula f=ps, the pressure of the left half butterfly plate 41 is larger than that of the right half butterfly plate 42, and the right half butterfly plate 42 continuously rotates under the larger pressure, and the reverse pressure of the fluid of the forward medium and the reverse medium are kept to balance, so that the pressure of the butterfly plate 4 in the left half sealing channel 21 and the right half sealing channel 22 and the annular sealing channel 2 is completed.
Referring to fig. 1 to 3, when the butterfly plate 4 and the seal ring 5 seal the annular seal passage 2, the seal ring 5 is not in a circular shape but in an elliptical shape under the extrusion of the butterfly plate 4 and the annular seal passage 2, the shape of the seal surface of the seal ring 5 becomes asymmetrical, and the center line of the seal ring 5 is inclined.
Because the butterfly plate 4 continues to rotate and the sealing ring 5 continues to squeeze to deform the sealing ring 5, the center line of the butterfly plate 4 is not parallel to the center line of the valve body 1, and an included angle is formed between the center line of the butterfly plate 4 and the center line of the valve body 1, that is, the butterfly plate 4 is offset relative to the axis of the valve body 1.
Further, referring to fig. 1 to 3, a sealing ring 7 is fixed on the inner wall of the annular sealing channel 2, the sealing ring 7 can be adhered and fixed on the inner wall of the annular sealing channel 2, when in use, a sealing pair is formed between the sealing ring 7 and the sealing ring 5, and due to the existence of a positive inclination angle and a negative inclination angle on the annular sealing channel 2, when the butterfly plate 4 rotates to the sealing ring 7 at the left half sealing channel 21, the sealing ring 7 is extruded, so that the sealing ring 7 is deformed, and therefore, a sealing pair is also formed between the butterfly plate 4 and the sealing ring 7, and the sealing effect and performance of the butterfly valve are improved; at the sealing channel 22 of the right half part, the fixing plate 6 can extrude the sealing ring 7 when rotating to the sealing ring 7, so that the sealing ring 7 is deformed, a sealing pair can be formed between the fixing plate 6 and the sealing ring 7, and the sealing effect and performance of the butterfly valve are improved.
Because the valve rod 3 is offset twice, the butterfly plate 4 and the sealing ring 5 are also offset, the sealing ring 5 fundamentally changes the sealing structure, the sealing structure is not position sealing but torsion sealing, and because the left half sealing channel 21 is positive inclination, the right half sealing channel 22 is negative inclination, the butterfly plate 4 forms torsion sealing on the extrusion of the butterfly plate 4 to the sealing ring 5 at the left half under the action of torsion, the sealing ring 5 and the sealing ring 7 can better seal the annular sealing channel 2, and under the extrusion action of the butterfly plate 4, the sealing pair is also formed between the butterfly plate 4 and the sealing ring 7, so that the annular sealing channel 2 is better sealed; at right half, fixed plate 6 also forms torsion seal to the extrusion of sealing washer 5, and sealing washer 5 and this pair of sealing washer 7 can be better seal annular seal passageway 2, and under the extrusion effect of fixed plate 6, also can form the sealing pair between fixed plate 6 and the sealing washer 7 to better seal annular seal passageway 2.
The sealing structure changes the sealing of the seal ring 5 and the seal ring 7 from the simple sealing of the seal ring 5 and the seal ring 7 to the torsion sealing of the seal ring 7 at the position of the butterfly plate 4 and the left half sealing channel 21 and the torsion sealing of the fixed plate 6 and the seal ring 7 at the position of the right half sealing channel 22, so that the annular sealing channel 2 realizes bidirectional sealing, and compared with the traditional elastic sealing of the butterfly plate 4 to the seal ring 5, the torsion sealing greatly improves the sealing effect.
The embodiment of the application also discloses a butterfly valve, which comprises the butterfly valve sealing structure disclosed by the embodiment.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. A butterfly valve seal structure, comprising:
A valve body;
The annular sealing channel is formed in the valve body and comprises a left half sealing channel and a right half sealing channel which are connected with each other;
the valve rod is rotationally connected to the valve body;
The butterfly plate is fixed on the valve rod; and
The sealing ring is sleeved on the butterfly plate and used for sealing under the extrusion of the butterfly plate and the annular sealing channel;
The left half sealing channel and the right half sealing channel are respectively positioned at two sides of the valve rod axis, a positive inclination angle is formed between the annular wall of the left half sealing channel and the valve body axis, a negative inclination angle is formed between the annular wall of the right half sealing channel and the valve body axis, and the annular wall of the left half sealing channel faces to the inflow direction of fluid in the valve body.
2. The butterfly valve seal of claim 1, wherein the inner wall of the annular seal passage is provided with a seal ring.
3. The butterfly valve seal of claim 1 wherein the angle of the negative rake angle is less than the angle of the positive rake angle.
4. A butterfly valve seal according to claim 3, wherein the positive rake angle is in the range of between 18 degrees and 24 degrees.
5. A butterfly valve seal according to claim 3, wherein the negative rake angle is in the range of 1 to 4 degrees.
6. The butterfly valve seal of claim 1, wherein the axis of the valve stem is located on a side of the annular seal passage adjacent the direction of fluid flow into the valve body.
7. The butterfly valve seal of claim 1, wherein the axis of the valve stem is not coplanar with the axis of the valve body, and the axis of the valve stem is located on a side of the valve body axis that is remote from the left half seal passage.
8. The butterfly valve sealing structure of claim 1, wherein the butterfly plate is detachably connected with a fixing plate, the sealing ring is located between the fixing plate and the butterfly plate, and the fixing plate fixes the sealing ring on the butterfly plate.
9. The butterfly valve seal of claim 8, wherein the fixed plate is secured to the butterfly plate by a bolted connection.
10. A butterfly valve comprising a butterfly valve seal according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322719078.6U CN220870108U (en) | 2023-10-10 | 2023-10-10 | Butterfly valve seal structure and butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322719078.6U CN220870108U (en) | 2023-10-10 | 2023-10-10 | Butterfly valve seal structure and butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220870108U true CN220870108U (en) | 2024-04-30 |
Family
ID=90814126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322719078.6U Active CN220870108U (en) | 2023-10-10 | 2023-10-10 | Butterfly valve seal structure and butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220870108U (en) |
-
2023
- 2023-10-10 CN CN202322719078.6U patent/CN220870108U/en active Active
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