CN216812896U - High-temperature bidirectional metal hard seal butterfly valve capable of prolonging service life - Google Patents
High-temperature bidirectional metal hard seal butterfly valve capable of prolonging service life Download PDFInfo
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- CN216812896U CN216812896U CN202220651251.6U CN202220651251U CN216812896U CN 216812896 U CN216812896 U CN 216812896U CN 202220651251 U CN202220651251 U CN 202220651251U CN 216812896 U CN216812896 U CN 216812896U
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Abstract
The utility model relates to a high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life. The butterfly valve comprises a valve body, a valve rod is rotatably arranged on the valve body, a disc plate is synchronously rotatably arranged on the valve rod in the valve body, a valve seat is arranged in the valve body, a hard sealing ring matched with the valve seat in a sealing mode is arranged on the disc plate, the valve body is provided with a valve body flow passage hole, and the valve seat is provided with a valve seat flow passage hole. The lower part of the valve body is provided with a mounting hole for rotatably mounting the valve rod, the lower end of the valve rod in the mounting hole is provided with an elastic compensation structure, and the elastic compensation structure can enable the valve rod to be pressed to generate elastic deformation when the temperature rises and the axial expansion is carried out. When the valve rod axial expansion, the axial deformation through the elastic compensation structure offsets the axial expansion volume of valve rod, avoids the valve rod to take the dish board to shift up and takes place the phenomenon that dish board and disk seat died, guarantees that the valve rod can continue to rotate and carry out the ooff valve for the butterfly valve still can use under high temperature environment, has also increased its life under high temperature environment simultaneously.
Description
Technical Field
The utility model relates to the field of valves, in particular to a high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life.
Background
The butterfly valve is also called as flap valve, is a regulating valve with simple structure, can be used for controlling the flow of various fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, and mainly plays the role of cutting off and throttling on a pipeline. 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 opening and closing or adjusting purposes are achieved.
The existing butterfly valve comprises a valve body, a valve rod is arranged on the valve body in a rotating mode, a disc plate is arranged on the valve rod in the valve body in a rotating mode, a valve seat is arranged in the valve body, a sealing ring matched with the valve seat in a sealing mode is arranged on the disc plate, the valve seat is welded on the inner wall of the valve body, the valve body is provided with a valve body flow passage hole, the valve seat is provided with a valve seat flow passage hole, and the disc plate is driven to open and close the valve seat flow passage hole through rotation of the valve rod so as to achieve opening and closing of the valve. The valve body is provided with a mounting hole for the lower end of the valve rod to rotate and mount, and the lower end of the valve rod directly pushes against the bottom wall of the mounting hole. When the butterfly valve is used in a high-temperature medium environment, the disc plate is connected with the valve rod, and the bottom of the valve rod is in contact with the valve body, so that the valve rod can be driven to move upwards after being heated and expanded, a phenomenon of deadlocking occurs between the disc plate and a sealing surface of a valve seat, and the problem that the valve rod cannot rotate or the valve rod is bent is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life, and aims to solve the problem that the service life of the butterfly valve is low in the prior art.
In order to achieve the purpose, the high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life adopts the following technical scheme: a high-temperature bidirectional metal hard seal butterfly valve capable of prolonging service life comprises a valve body, wherein a valve rod is rotatably arranged on the valve body, a disc plate is synchronously rotatably arranged on the valve rod in the valve body, a valve seat is arranged in the valve body, a hard seal ring in sealing fit with the valve seat is arranged on the disc plate, the valve body is provided with a valve body flow passage hole, and the valve seat is provided with a valve seat flow passage hole; the lower part of the valve body is provided with a mounting hole for rotatably mounting the valve rod, the lower end of the valve rod in the mounting hole is provided with an elastic compensation structure, and the elastic compensation structure can enable the valve rod to be pressed to generate elastic deformation when the temperature rises and the axial expansion is carried out.
The elastic compensation structure comprises a disc spring.
The elastic compensation structure further comprises a first antifriction gasket and a second antifriction gasket which are positioned on the upper side and the lower side of the disc spring.
And grooves for accommodating disc springs are arranged on the first antifriction gasket and/or the second antifriction gasket.
The utility model has the beneficial effects that: when axial expansion does not take place for the valve rod, the bottom of valve rod is supported by the elastic compensation structure and carries out switch valve in order to realize normal rotation, and when valve rod axial expansion, axial expansion volume of valve rod is offset through the axial deformation of elastic compensation structure, can not make the dish board move up and take place the top dead phenomenon with the sealed face of disk seat when guaranteeing that the valve rod is heated axial expansion for the butterfly valve still can use under high temperature environment, has also increased its life under high temperature environment simultaneously.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life of the butterfly valve;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Detailed Description
The embodiment of the high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life comprises a valve body 1, a valve rod 2 is rotatably arranged on the valve body 1, a disc plate 3 is synchronously and rotatably arranged on the valve rod in the valve body, a valve seat 4 is arranged in the valve body, a hard seal ring in sealing fit with the valve seat is arranged on the disc plate, the valve body is provided with a valve body flow passage hole 5, the valve seat is provided with a valve seat flow passage hole, and the valve rod is rotated to drive the disc plate to open and close the valve seat flow passage hole so as to open and close the valve.
The lower part of the valve body is provided with a mounting hole 6 for rotatably mounting the valve rod, the lower end of the valve rod in the mounting hole is provided with an elastic compensation structure 9, and the elastic compensation structure can enable the valve rod to be pressed to generate elastic deformation when the temperature rises and the axial expansion is carried out. If not set up the elasticity compensation structure, the valve rod is receiving under the influence of high temperature medium, and the valve rod temperature risees and can lead to its axial to take place the inflation, because the dish board links together with the valve rod, leads to the valve rod to be heated and can drive the dish board after the inflation and move upward, makes and takes place the top dead phenomenon between dish board and the sealed face of disk seat, causes the unable problem of rotating or valve rod bending of valve rod. Specifically, in this embodiment, the elastic compensation structure includes a first friction reduction pad 10, a disc spring 11, and a second friction reduction pad 12, which are sequentially disposed. When axial expansion does not take place for the valve rod, the bottom of valve rod is supported by the elasticity compensation structure and carries out the switch valve in order to realize normal rotation, and when valve rod axial expansion, the deformation through the dish spring offsets axial deflection, still can guarantee that the valve rod can continue to rotate and carry out the switch valve. The grooves 16 for accommodating the disc springs are formed in the first antifriction bearing and the second antifriction bearing, so that the disc springs can be conveniently positioned and installed, and the compensation amount of the elastic compensation structure can be increased. The lower extreme that is provided with the axle sleeve in the mounting hole for the valve rod is packed into, is provided with first step 13 on the pore wall of mounting hole, is provided with on the lateral wall of axle sleeve with the spacing complex second step of first step axial. The inside wall of axle sleeve is provided with third step 14, and the lower part of valve rod is provided with the fourth step with the spacing cooperation of third step axial. The mounting hole runs through the valve body downwards, is provided with the bottom 8 of shutoff mounting hole on the valve body, and the bottom passes through the screw connection on the valve body. The bottom cover is provided with a mounting groove 15 for mounting an elastic compensation structure.
In other embodiments of the present invention, the elastic compensation structure may only include a disc spring; the disc spring can also be replaced by a common spiral spring; under the influence of no influence on use, the shaft sleeve can be omitted from the mounting hole; a groove for accommodating the disc spring can be arranged on the first antifriction gasket; or a groove for accommodating the disc spring can be arranged on the second antifriction gasket; it is also possible that neither of the wear reducing gaskets is provided with a recess.
Claims (4)
1. A high-temperature bidirectional metal hard seal butterfly valve capable of prolonging service life comprises a valve body, wherein a valve rod is rotatably arranged on the valve body, a disc plate is synchronously rotatably arranged on the valve rod in the valve body, a valve seat is arranged in the valve body, a hard seal ring in sealing fit with the valve seat is arranged on the disc plate, the valve body is provided with a valve body flow passage hole, and the valve seat is provided with a valve seat flow passage hole; the method is characterized in that: the lower part of the valve body is provided with a mounting hole for rotatably mounting the valve rod, the lower end of the valve rod in the mounting hole is provided with an elastic compensation structure, and the elastic compensation structure can enable the valve rod to be pressed to generate elastic deformation when the temperature rises and the axial expansion is carried out.
2. The high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life of the butterfly valve according to claim 1, wherein: the elastic compensation structure comprises a disc spring.
3. The high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life according to claim 2, wherein: the elastic compensation structure further comprises a first antifriction gasket and a second antifriction gasket which are positioned on the upper side and the lower side of the disc spring.
4. The high-temperature bidirectional metal hard seal butterfly valve capable of prolonging the service life according to claim 3, wherein: and grooves for accommodating disc springs are arranged on the first antifriction gasket and/or the second antifriction gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220651251.6U CN216812896U (en) | 2022-03-23 | 2022-03-23 | High-temperature bidirectional metal hard seal butterfly valve capable of prolonging service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220651251.6U CN216812896U (en) | 2022-03-23 | 2022-03-23 | High-temperature bidirectional metal hard seal butterfly valve capable of prolonging service life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216812896U true CN216812896U (en) | 2022-06-24 |
Family
ID=82046577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220651251.6U Active CN216812896U (en) | 2022-03-23 | 2022-03-23 | High-temperature bidirectional metal hard seal butterfly valve capable of prolonging service life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216812896U (en) |
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2022
- 2022-03-23 CN CN202220651251.6U patent/CN216812896U/en active Active
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