CN220581735U - Ball valve disk seat dustproof construction - Google Patents
Ball valve disk seat dustproof construction Download PDFInfo
- Publication number
- CN220581735U CN220581735U CN202322198591.5U CN202322198591U CN220581735U CN 220581735 U CN220581735 U CN 220581735U CN 202322198591 U CN202322198591 U CN 202322198591U CN 220581735 U CN220581735 U CN 220581735U
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- valve seat
- ball
- dust
- ring
- valve
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- 238000010276 construction Methods 0.000 title description 2
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 239000000945 filler Substances 0.000 claims abstract description 23
- 239000000428 dust Substances 0.000 claims abstract description 11
- 238000012856 packing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
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- Taps Or Cocks (AREA)
Abstract
The utility model relates to the technical field of valve seat dust prevention, and provides a ball valve seat dust prevention structure, which comprises a valve body, a valve seat and a pre-tightening spring, wherein a sealing filler is arranged between one end of the valve seat far away from a ball body and the valve body; the valve seat is close to the outer wall of one end of the ball body and is provided with a step, the step is located in the radial direction of the spring hole, a dust-proof ring, a gasket and an elastic piece are sequentially arranged between the step and the valve body along the direction close to the ball body, and the gasket is pressed against the dust-proof ring under the action of the elastic piece. The utility model ensures that the two sealing structures are arranged along the radial direction of the flow channel, can reduce the axial dimension of the valve seat, is convenient for adapting to some small-specification valves, is not limited by the structural length of the valve, and can be applied to valves with different specifications.
Description
Technical Field
The utility model relates to the technical field of valve seat dust prevention, in particular to a ball valve seat dust prevention structure.
Background
The ball valve is widely applied to the industrial fields of chemical industry, smelting, energy sources and the like, is mainly used for cutting off, adjusting flow, changing the flow direction of a medium and the like in a pipeline, is operated in a 90-degree rotation mode, and has the characteristics of wear resistance, reliable sealing, long service life and the like. On some coal chemical industry and polycrystalline silicon devices, most of the devices contain high-hardness particles and dust, the operation working condition of the valve is very bad, in view of the structural characteristics of the ball valve, the sealing between the valve seat and the valve body and between the valve seat and the ball body generally needs a spring to be pre-tightened so as to achieve sealing specific pressure, but particles or dust in the media can enter and be continuously accumulated in a spring cavity, so that the spring cannot freely stretch out and draw back any more, the spring cannot provide enough elasticity to keep the sealing performance of the valve, and therefore, the sealing failure and internal leakage of the valve are caused, the performance and the service life of the ball valve are seriously influenced, and sealing treatment is generally needed between the two ends of the valve seat and the valve body.
In the prior art, for example, patent documents with publication numbers of CN206530727U and CN205026139U respectively set a dustproof structure in the front-back direction (i.e. the axial direction of the flow channel) of the pretension spring to improve the sealing effect, effectively isolate dust or particles from entering the spring cavity to cause the pretension spring to fail, however, the mode of axially designing the dustproof structure can enlarge the axial dimension of the valve seat, and the valves have standard structural length limitation, and have larger limitation in axially designing the dustproof structure, which cannot even be realized in some small-sized valves.
Disclosure of Invention
The utility model aims to provide a dustproof structure of a ball valve seat, which aims to solve the problem that the axial size of the valve seat can be increased by the dustproof structure in the prior art, and the dustproof structure cannot be even realized in some small-specification valves.
The embodiment of the utility model is realized by the following technical scheme:
a ball valve seat dustproof structure comprises a valve body, a valve seat and a pre-tightening spring, wherein sealing filler is arranged between one end of the valve seat, which is far away from a ball body, and the valve body; the valve seat is close to the outer wall of one end of the ball body and is provided with a step, the step is located in the radial direction of the spring hole, a dust-proof ring, a gasket and an elastic piece are sequentially arranged between the step and the valve body along the direction close to the ball body, and the gasket is pressed against the dust-proof ring under the action of the elastic piece.
Optionally, the elastic element is a wave spring.
Optionally, the sealing filler comprises a plurality of V-shaped sealing rings.
Optionally, a contact surface of one end of the sealing filler away from the ball body and the valve body is a wedge-shaped surface.
Optionally, the outer wall of the pressure ring is provided with a limiting ring, and the valve body is provided with a limiting surface, wherein the limiting surface is configured to limit the axial displacement distance of the limiting ring to exceed the target distance.
The utility model has at least the following advantages and beneficial effects: in the utility model, a sealing structure (namely sealing filler) between one end of the valve seat far away from the ball body and the valve body is axially parallel to the pre-tightening spring, and the pre-tightening spring is utilized to enable the compression ring to compress the sealing filler and enable the valve seat to abut against the ball body at the same time; the sealing structure (namely the dustproof ring, the gasket and the elastic piece) between one end of the valve seat close to the ball body and the valve body is arranged in the radial direction of the spring hole, namely the two sealing structures are arranged along the radial direction of the flow channel, so that the axial size of the valve seat can be reduced, the valve seat is convenient to adapt to some small-size valves, is not limited by the structural length of the valve, and can be applied to valves with different specifications.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dustproof structure of a valve seat of a ball valve;
icon: the valve comprises a valve body 1, a limiting surface 101, a valve seat 2, a sealing filler 3, a compression ring 4, a limiting ring 401, a pre-tightening spring 5, a ball 6, a wave spring 7, a gasket 8 and a dust-proof ring 9.
Detailed Description
Referring to fig. 1, a ball valve seat dustproof structure comprises a valve body 1, a valve seat 2 and a pre-tightening spring 5, wherein a sealing filler 3 is arranged between one end of the valve seat 2 away from a ball 6 (for convenience of description, the end of the valve seat 2 away from the ball 6 is hereinafter referred to as a rear end), a spring hole is arranged on the valve seat 2, a compression ring 4 is arranged between the spring hole and the sealing filler 3, and the pre-tightening spring 5 is pressed in the spring hole, so that the compression ring 4 compresses the sealing filler 3 and enables the valve seat 2 to abut against the ball 6; the outer wall of one end of the valve seat 2, which is close to the ball 6 (for convenience of description, the end of the valve seat 2, which is close to the ball 6, is hereinafter referred to as the front end) is provided with a step, the step is located in the radial direction of the spring hole, a dust-proof ring 9, a gasket 8 and an elastic member are sequentially arranged between the step and the valve body 1 along the direction, which is close to the ball 6, and the gasket 8 is pressed against the dust-proof ring 9 under the action of the elastic member.
It should be noted that, in the utility model, a sealing structure (namely, a sealing filler 3) between the rear end of the valve seat 2 and the valve body 1 is axially parallel to the pre-tightening spring 5, and the pre-tightening spring 5 is utilized to enable the compression ring 4 to compress the sealing filler 3 and enable the valve seat 2 to abut against the ball 6 at the same time; the sealing structure (namely the dustproof ring 9, the gasket 8 and the elastic piece) between the front end of the valve seat 2 and the valve body 1 is arranged in the radial direction of the spring hole, namely the two sealing structures are arranged along the radial direction of the flow passage, so that the axial size of the valve seat 2 can be reduced, the valve seat is convenient to adapt to some small-specification valves, the valve seat is not limited by the structural length of the valve, and the valve seat can be applied to valves with different specifications.
Specifically, in this embodiment, the valve seat 2 is designed into a stepped structure with a large diameter at the front end and a small diameter at the rear end, the spring hole is arranged at the rear side of the front end of the valve seat 2, the sealing filler 3 is arranged between the outer wall of the rear end of the valve seat 2 and the valve body 1, and it should be understood that the valve body 1 should be provided with steps to limit the sealing filler 3; the steps are arranged at the rear end and located in the radial direction of the spring hole, namely the upper side of the spring hole in the drawing, and the two sealing structures are arranged in the upper and lower directions in the drawing, namely the two sealing structures are arranged along the radial direction of the flow passage, so that the axial size of the valve seat 2 is reduced.
In this embodiment, the spring 7 is selected, and the wave spring 7 is simply called as a wave spring, and is an elastic element with a plurality of peaks and valleys on a metal thin ring.
The sealing filler 3 in this embodiment includes a plurality of V-shaped sealing rings, and the material is not limited, for example, flexible graphite, polytetrafluoroethylene, etc., and similarly, the material of the dust-proof ring 9 is not limited, and may also be flexible graphite, polytetrafluoroethylene, etc.
In the utility model, when in installation, a pre-tightening spring 5 is arranged in a spring hole, a compression ring 4 and a sealing filler 3 are sequentially arranged, an elastic piece, a gasket 8 and a dustproof ring 9 are arranged at the step, a valve seat 2 is arranged in a valve body 1, after the rear end of the sealing filler 3 is propped against the valve body 1, and after the dustproof ring 9 is propped against the step end surface of the valve seat 2, the pre-tightening spring 5 and the elastic piece start to compress; after the pre-tightening spring 5 is tightly pressed, the compression elastic force of the pre-tightening spring acts on the sealing packing 3 through the pressing ring 4, the sealing packing 3 is compressed to be tightly attached to the valve body 1, namely the valve seat 2 to form sealing, and meanwhile, the compression elastic force of the pre-tightening spring 5 acts on the valve seat 2 to enable the valve seat 2 to be in extrusion contact with the ball body 6 to generate sealing specific pressure; after the elastic piece is compressed, the compression elastic force of the elastic piece acts on the dustproof ring 9 through the gasket 8, the radial dimension of the dustproof ring 9 becomes larger after the dustproof ring is axially pressed, and the gap between the valve body 1 and the valve seat 2 is filled, so that the solid medium is effectively blocked from passing through. In sum, after the cooperation of sealing packing 3 and dust ring 9, the inside tiny particle medium of valve can all reliably be isolated, can't get into in the space that pretension spring 5 is located to avoid pretension spring 5 to become invalid because of being wrapped up by solid medium, and then avoid ball valve seal inefficacy, interior hourglass and the condition such as card die.
On the basis of the above, the contact surface of the end, far away from the ball 6, of the sealing filler 3 and the valve body 1 in the embodiment is a wedge-shaped surface, and it is worth to be noted that the compression effect of the sealing filler 3 is better, namely, the sealing effect is improved.
The outer wall of the pressure ring 4 is provided with a limiting ring 401, the valve body 1 is provided with a limiting surface 101, the limiting surface 101 is configured to limit the axial displacement distance of the limiting ring 401 to exceed the target distance, namely, after the installation, a gap is reserved between the limiting ring 401 and the limiting surface 101, and the limiting surface 101 limits the maximum compression thickness of the sealing filler 3 and the dust-proof ring 9 to be the gap, so that the locking of the valve seat 2 caused by the excessive compression of the sealing filler 3 and the dust-proof ring 9 can be avoided.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. The ball valve seat dustproof structure comprises a valve body (1), a valve seat (2) and a pre-tightening spring (5), wherein a sealing filler (3) is arranged between one end, far away from a ball body (6), of the valve seat (2) and the valve body (1); the valve seat (2) is close to the radial direction of the spring hole, and is equipped with dust ring (9), packing ring (8) and elastic component along being close to the direction of spheroid (6) between step and valve body (1) in proper order to make packing ring (8) compress tightly dust ring (9) under the effect of elastic component.
2. A ball valve seat dust-proof structure according to claim 1, characterized in that the elastic member is a wave spring (7).
3. A ball valve seat dust protection structure according to claim 1, characterized in that the sealing packing (3) comprises a plurality of V-shaped sealing rings.
4. A ball valve seat dust-proof structure according to claim 1, characterized in that the contact surface of the sealing filler (3) and the valve body (1) at the end far away from the ball body (6) is a wedge-shaped surface.
5. The ball valve seat dustproof structure according to claim 1, characterized in that the outer wall of the pressing ring (4) is provided with a limiting ring (401), the valve body (1) is provided with a limiting surface (101), and the limiting surface (101) is configured to limit the axial displacement distance of the limiting ring (401) to exceed the target distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322198591.5U CN220581735U (en) | 2023-08-15 | 2023-08-15 | Ball valve disk seat dustproof construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322198591.5U CN220581735U (en) | 2023-08-15 | 2023-08-15 | Ball valve disk seat dustproof construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220581735U true CN220581735U (en) | 2024-03-12 |
Family
ID=90110600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322198591.5U Active CN220581735U (en) | 2023-08-15 | 2023-08-15 | Ball valve disk seat dustproof construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220581735U (en) |
-
2023
- 2023-08-15 CN CN202322198591.5U patent/CN220581735U/en active Active
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