CN216923226U - Zero-leakage butterfly valve - Google Patents
Zero-leakage butterfly valve Download PDFInfo
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- CN216923226U CN216923226U CN202122717998.5U CN202122717998U CN216923226U CN 216923226 U CN216923226 U CN 216923226U CN 202122717998 U CN202122717998 U CN 202122717998U CN 216923226 U CN216923226 U CN 216923226U
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Abstract
The utility model provides a zero-leakage butterfly valve, and belongs to the technical field of valves. The utility model comprises a valve body and a valve plate, wherein the valve plate is arranged in the valve body, a valve rod is arranged in the middle of the upper part in the valve body, a lower shaft is arranged in the middle of the lower part in the valve body, the valve rod and the lower shaft are coaxial and are arranged on one side of the central line of the valve plate in the vertical direction, the valve plate is arranged on one side of the valve rod and the lower shaft, the upper end and the lower end of the valve plate are respectively connected with the valve rod and the lower shaft, a circle of annular bulge is arranged on the inner wall of the valve body corresponding to the valve plate, a sealing ring is arranged on the outer circumferential surface of the valve plate, and the valve plate is in contact connection with the inner wall of the annular bulge through the sealing ring.
Description
Technical Field
The utility model relates to a zero-leakage butterfly valve, and belongs to the technical field of valves.
Background
A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk.
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 mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.
Traditional ventilation butterfly valve is because of simple structure, so use extensively, but along with environmental protection requirement's improvement, to the emission restriction of waste gas, traditional ventilation butterfly valve's sealing performance (leakage rate 1% CV) is more and more difficult to satisfy the operation requirement.
SUMMERY OF THE UTILITY MODEL
In view of the above disadvantages of the prior art, the present invention provides a zero-leakage butterfly valve, which is used to solve the problem that the sealing performance of the conventional ventilation butterfly valve is more and more difficult to meet the use requirement for the emission limit of exhaust gas as the environmental protection requirement is improved in the prior art.
To achieve the above and other related objects, the present invention provides a zero-leakage butterfly valve comprising: valve body and valve plate, the valve plate setting inside the valve body, be provided with the valve rod in the middle of the inside top of valve body, be provided with the lower shaft in the middle of the below, valve rod and lower shaft are coaxial and set up in the vertical direction central line one side of valve plate, the valve plate setting is connected with valve rod and lower shaft respectively at valve rod and lower shaft one side and upper and lower both ends, be provided with the annular arch of round with valve plate position department of correspondence on the valve body inner wall, the outer peripheral surface of valve plate is provided with the sealing washer, the valve plate contacts with the protruding inner wall of annular through the sealing washer and is connected.
In an embodiment of the present invention, a packing is disposed at a connection portion of the valve rod and the valve body, and a packing gland is disposed above the packing.
In an embodiment of the utility model, a pressure plate is arranged on the edge of the surface of one side of the valve plate, the pressure plate and the valve plate clamp and fix the sealing ring, and the pressure plate is fixedly connected with the valve plate through a hexagon head bolt.
In an embodiment of the utility model, the inner wall of the annular protrusion gradually decreases in a direction away from the valve stem to form a cone.
In an embodiment of the present invention, the sealing ring is a teflon soft sealing ring.
As mentioned above, the zero-leakage butterfly valve provided by the utility model has the following beneficial effects:
according to the utility model, the valve rod and the lower shaft are eccentrically arranged on the basis of the traditional ventilation butterfly valve, so that the valve plate forms a cam effect after being stressed, and the sealing performance of the butterfly valve is improved effectively as the air acting force is larger under the action of the sealing ring and the annular bulge, and the device has a simple structure and is simple and convenient to operate.
Drawings
Fig. 1 is a schematic front cross-sectional view illustrating a zero-leakage butterfly valve according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of the valve assembly of fig. 1 taken along line a-a in an embodiment of the utility model.
Fig. 3 is an enlarged structural diagram of a portion B of fig. 2 of a zero-leakage butterfly valve according to an embodiment of the utility model.
Wherein, 1, a valve body; 2. a lower shaft; 3. a valve plate; 4. a valve stem; 5. a filler; 6. a packing gland; 7. a seal ring; 8. pressing a plate; 9. a hexagon head bolt; 10. an annular protrusion.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 3. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a zero-leakage butterfly valve, including: valve body 1 and valve plate 3, valve plate 3 set up inside valve body 1, be provided with valve rod 4 in the middle of the 1 inside top of valve body, be provided with down axle 2 in the middle of the below, valve rod 4 and down axle 2 are coaxial and set up in 3 vertical direction central lines one sides of valve plate, valve plate 3 sets up and is connected with valve rod 4 and down axle 2 respectively at valve rod 4 and 2 one side of down axle and upper and lower both ends, it is protruding 10 with the valve plate 3 position department of correspondence to be provided with the round annular on the 1 inner wall of valve body, 3 outer circumferential surface of valve plate is provided with sealing washer 7, valve plate 3 contacts with the protruding 10 inner walls of annular through sealing washer 7 and is connected.
And a packing 5 is arranged at the joint of the valve rod 4 and the valve body 1, and a packing gland 6 is arranged above the packing 5.
The edge of the surface of one side of the valve plate 3 is provided with a pressing plate 8, the pressing plate 8 and the valve plate 3 clamp and fix the sealing ring 7, and the pressing plate 8 is fixedly connected with the valve plate 3 through a hexagon head bolt 9.
The inner wall of the annular bulge 10 is tapered in the direction that the inner wall is directly away from the valve rod 4.
The sealing ring 7 is a polytetrafluoroethylene soft sealing ring.
The working principle of the zero-leakage butterfly valve is as follows: valve plate 3 rotates around valve rod 4 and lower shaft 2 and is certain angle with valve body 1, the butterfly valve is opened and is ventilated, valve plate 3 continues to rotate around valve rod 4 and lower shaft 2, 3 marginal sealing washer 7 of valve plate and annular bulge 10 complete contact, the butterfly valve is closed this moment, when gaseous when getting into, gaseous to 3 surperficial pressure of valve plate, under the effect of pressure, because valve rod 4 and lower shaft 2 eccentric settings are on 3 surfaces of valve plate, form the structure of a similar cam, under gaseous effort, valve plate 3 is to the 10 internal motion of annular bulge, because the inside toper that is of annular bulge 10, pressure is big more, it is inseparabler to laminate between valve plate 3 and the annular bulge 10, thereby sealing performance is better.
In summary, the valve rod and the lower shaft are eccentrically arranged on the basis of the traditional ventilation butterfly valve, so that the valve plate forms a cam effect after being stressed, the larger the air acting force is, the higher the sealing performance of the butterfly valve is, the sealing performance of the ventilation butterfly valve is effectively improved, and the device is simple in structure and convenient to operate. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. A zero-leakage butterfly valve, comprising: valve body and valve plate, the valve plate setting inside the valve body, be provided with the valve rod in the middle of the inside top of valve body, be provided with the lower shaft in the middle of the below, valve rod and lower shaft are coaxial and set up in the vertical direction central line one side of valve plate, the valve plate setting is connected with valve rod and lower shaft respectively at valve rod and lower shaft one side and upper and lower both ends, be provided with the annular arch of round with valve plate position department of correspondence on the valve body inner wall, the outer peripheral surface of valve plate is provided with the sealing washer, the valve plate contacts with the protruding inner wall of annular through the sealing washer and is connected.
2. A zero-leak butterfly valve according to claim 1, characterized in that: the joint of the valve rod and the valve body is provided with a filler, and a filler gland is arranged above the filler.
3. A zero-leak butterfly valve according to claim 1, characterized in that: the edge of the surface of one side of the valve plate is provided with a pressing plate, the pressing plate and the valve plate clamp and fix the sealing ring, and the pressing plate is fixedly connected with the valve plate through a hexagon head bolt.
4. A zero-leak butterfly valve according to claim 1, characterized in that: the inner wall of the annular protrusion is tapered in the direction that the inner wall of the annular protrusion is directly and radially far away from the valve rod.
5. A zero-leak butterfly valve according to claim 1, characterized in that: the sealing ring is a polytetrafluoroethylene soft sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122717998.5U CN216923226U (en) | 2021-11-08 | 2021-11-08 | Zero-leakage butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122717998.5U CN216923226U (en) | 2021-11-08 | 2021-11-08 | Zero-leakage butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216923226U true CN216923226U (en) | 2022-07-08 |
Family
ID=82248548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122717998.5U Active CN216923226U (en) | 2021-11-08 | 2021-11-08 | Zero-leakage butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216923226U (en) |
-
2021
- 2021-11-08 CN CN202122717998.5U patent/CN216923226U/en active Active
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