CN219299960U - Bellows stop valve - Google Patents
Bellows stop valve Download PDFInfo
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- CN219299960U CN219299960U CN202320179189.XU CN202320179189U CN219299960U CN 219299960 U CN219299960 U CN 219299960U CN 202320179189 U CN202320179189 U CN 202320179189U CN 219299960 U CN219299960 U CN 219299960U
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- conical surface
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- pressed
- expansion
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Abstract
The utility model discloses a corrugated pipe stop valve, which relates to the technical field of stop valves in valves and solves the leakage problem in high-pressure environments, wherein a valve clack assembly comprises a valve clack main body, a pressed inner ring and an expanding outer ring, the pressed inner ring is movably arranged on the bottom surface of the valve clack main body, the bottom surface of the pressed inner ring is directly imported to bear the medium pressure of the imported, and the periphery of the pressed inner ring comprises a pressed conical surface; the expansion outer ring is sleeved on the periphery of the pressed inner ring and is propped against the bottom surface of the valve clack main body, the expansion outer ring comprises a sealing conical surface and an expansion conical surface, the expansion conical surface is positioned at the inner ring of the expansion outer ring and is in staggered fit with the pressed conical surface, and the sealing conical surface is in contact with the valve seat to form sealing fit. The medium fluid forms pressure at the inlet to press the inner ring to make the inner ring rise to the valve rod, and the pressure conical surface is staggered with the expanding conical surface to slightly expand the expanding outer ring along the radial direction, so that the sealing conical surface is tightly pressed on the valve seat, and high tightness is obtained.
Description
Technical Field
The utility model relates to the technical field of stop valves in valves, in particular to a corrugated pipe stop valve.
Background
The corrugated pipe stop valve has the advantages that the valve cavity has good sealing performance due to the corrugated pipe sealing structure of the valve cavity, and the structure advantage is obvious due to the design of the element which surrounds the corrugated pipe and is used as a shielding medium. Taking a Chinese published patent (publication number: CN 114811061A) as an example, a bellows stop valve, the valve assembly comprises: the valve clack, thrust pad, valve clack lid, the valve clack lid cover is established the valve rod lower part, the thrust pad sets up the valve rod bottom, the cover is equipped with the valve clack on the valve clack lid, the thrust pad with valve clack bottom inner wall connection. The valve clack and the thrust pad jointly act to close the valve, when the valve rod moves downwards to close the valve, the thrust pad is used for extruding the valve clack, and the valve clack is extruded into a pipeline of an inlet, so that the valve is closed, and the sealing performance of the valve is improved. However, in practical applications, especially in a high-pressure medium environment, the effect of improving the sealing performance is not obvious by only pressing the valve clack by the thrust pad, and a small amount of leakage still exists, even if the leakage is more along with the larger impact of the medium pressure.
Disclosure of Invention
The purpose of the utility model is that: in order to overcome the defects of the prior art, the utility model provides a corrugated pipe stop valve, which solves the problem of leakage in a high-pressure environment.
The technical scheme of the utility model is as follows: the valve comprises a valve clack assembly, a valve seat, a valve body and a valve rod, wherein the valve rod movably penetrates through the valve body, the valve clack assembly is arranged at the bottom end of the valve rod, an inlet is formed in the valve body, the valve seat is fixed in the valve body at the downstream position of the inlet, the valve clack assembly comprises a valve clack main body, a pressed inner ring and an expanding outer ring, the pressed inner ring is movably arranged on the bottom surface of the valve clack main body, the bottom surface of the pressed inner ring is directly imported to be pressed by medium pressure of the inlet, and the periphery of the pressed inner ring comprises a pressed conical surface; the expansion outer ring is sleeved on the periphery of the pressed inner ring and is propped against the bottom surface of the valve clack main body, the expansion outer ring comprises a sealing conical surface and an expansion conical surface, the expansion conical surface is positioned at the inner ring of the expansion outer ring and is in staggered fit with the pressed conical surface, and the sealing conical surface is in contact with the valve seat to form sealing fit.
By adopting the technical scheme, the medium fluid forms the pressure jacking pressure inner ring at the inlet, so that the pressure inner ring rises to the valve rod, the pressure conical surface is staggered with the expansion conical surface to slightly expand the expansion outer ring along the radial direction of the expansion conical surface, and the sealing conical surface is tightly pressed on the valve seat, so that high sealing performance is obtained, and under the impact of high medium pressure, the tight fit degree between the sealing conical surface and the valve seat is tighter, the better the sealing performance is, and the leakage is smaller.
The utility model is further provided with: the valve clack main body is in threaded connection with a pre-tightening bolt, the pre-tightening bolt is arranged in the pressed inner ring in a penetrating mode and is propped against the bottom surface of the pressed inner ring, and a reserved gap is arranged between the top surface of the pressed inner ring and the valve clack main body.
By adopting the further arrangement, when the valve is assembled, the compression degree of the compressed inner ring to the expanding outer ring is adjusted in advance by rotating the pre-tightening bolt, the size of the reserved gap is kept, and then a rising space is provided for the compressed inner ring when the medium pressure impacts the compressed inner ring.
Still further, the present utility model provides: the expanding conical surface and the pressed conical surface incline from the inlet to the valve rod direction to the central axis of the valve rod.
By adopting the above arrangement, the expansion pressure on the expansion outer ring is formed, so that the expansion outer ring is expanded along the radial direction.
Still further, the present utility model is provided with: the sealing conical surface is inclined outwards from the inlet to the valve rod.
By adopting the arrangement, the direction of the conduction force of the expanding outer ring is met, and the abrasion to the sealing surface when the valve is opened is reduced.
Still further, the present utility model is provided with: the expanding outer ring is made of polytetrafluoroethylene material.
By adopting the further arrangement, the polytetrafluoroethylene has certain stress deformation performance, and has strong wear resistance and high chemical stability, so that the selection of materials is reasonable.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is an enlarged view of a portion of the utility model at A in FIG. 1;
wherein, 1, the valve clack assembly; 2. a valve seat; 3. a valve body; 4. a valve stem; 31. an inlet; 11. a valve flap body; 12. a pressurized inner ring; 13. expanding the outer ring; 121. a pressed conical surface; 131. sealing the conical surface; 132. expanding the conical surface; 14. and pre-tightening the bolts.
Description of the embodiments
The bellows stop valve as shown in fig. 1 and 2 comprises a valve clack assembly 1, a valve seat 2, a valve body 3 and a valve rod 4, wherein the valve rod 4 movably penetrates through the valve body 3, the valve clack assembly 1 is arranged at the bottom end of the valve rod 4, an inlet 31 is arranged in the valve body 3, and the valve seat 2 is fixed in the valve body 3 at the downstream position of the inlet 31. The valve clack assembly 1 comprises a valve clack main body 11, a pressure-bearing inner ring 12 and an expansion outer ring 13, wherein the pressure-bearing inner ring 12 is arranged on the bottom surface of the valve clack main body 11 in a lifting and movable mode, a straight-surface inlet 31 on the bottom surface of the pressure-bearing inner ring 12 is used for receiving medium pressure from the direction of the inlet 31, and the periphery of the pressure-bearing inner ring 12 comprises a pressure-bearing conical surface 121; the expansion outer ring 13 is sleeved on the periphery of the pressed inner ring 12 and is propped against the bottom surface of the valve clack main body 11, so that the expansion outer ring 13 cannot expand towards the valve clack main body 11, the expansion outer ring 13 comprises a sealing conical surface 131 and an expansion conical surface 132, the expansion conical surface 132 is positioned at the inner ring position of the expansion outer ring 13 and is in staggered fit with the pressed conical surface 121, and the sealing conical surface 131 is in contact with the valve seat 2 to form sealing fit. The expansion conical surface 132 and the compression conical surface 121 incline from the inlet 31 to the valve rod 4 direction to the central axis of the valve rod 4, and the sealing conical surface 131 inclines from the inlet 31 to the valve rod 4 direction. When the valve is closed, the sealing conical surface 131 is in contact with the valve seat 2 to seal, along with the increase of the medium pressure at the inlet 31, the pressure is applied to the pressed inner ring 12 to jack up, and the pressed conical surface 121 is staggered with the expanding conical surface 132, so that the expanding outer ring 13 slightly expands along the radial direction of the expanding conical surface, and meanwhile, the sealing conical surface 131 is more tightly pressed on the valve seat 2. When the valve is about to be opened, due to the inclination of the sealing conical surface 131, the abrasion to the sealing surface can be reduced, so that the service life can be prolonged. In addition, the sealing degree of the sealing conical surface 131 and the valve seat 2 can be enhanced with the increase of the medium pressure, and the sealing conical surface can be suitable for the environment with high medium pressure.
The valve clack main body 11 is in threaded connection with a pre-tightening bolt 14, the pre-tightening bolt 14 penetrates through the compressed inner ring 12 and is propped against the bottom surface of the compressed inner ring 12, when the valve is assembled, the pre-tightening bolt 14 is rotated to enable the expanded outer ring 13 to have a certain pre-tightening pressure, and when the valve is closed, the sealing conical surface 131 is in contact with the valve seat 2 for sealing. When the valve is assembled, a reserved gap is arranged between the top surface of the pressed inner ring 12 and the valve clack main body 11, so that the pressed inner ring 12 can be further lifted to push and expand the outer ring 13.
The expansion outer ring 13 is made of polytetrafluoroethylene material, and the polytetrafluoroethylene is almost insoluble in all solvents, has high temperature resistance, corrosion resistance and high chemical stability, and has certain stress deformation performance, so that the expansion outer ring 13 has expansion.
Claims (5)
1. The utility model provides a bellows stop valve, is including valve clack subassembly, disk seat, valve body and valve rod, the valve rod activity wears to locate in the valve body, the valve clack subassembly is installed in the bottom of valve rod, be provided with the import in the valve body, the disk seat is fixed in the valve body of import department low reaches position, its characterized in that: the valve clack assembly comprises a valve clack main body, a pressed inner ring and an expanded outer ring, wherein the pressed inner ring is movably arranged on the bottom surface of the valve clack main body, the bottom surface of the pressed inner ring is directly imported to be pressed by the medium pressure of the imported, and the periphery of the pressed inner ring comprises a pressed conical surface; the expansion outer ring is sleeved on the periphery of the pressed inner ring and is propped against the bottom surface of the valve clack main body, the expansion outer ring comprises a sealing conical surface and an expansion conical surface, the expansion conical surface is positioned at the inner ring of the expansion outer ring and is in staggered fit with the pressed conical surface, and the sealing conical surface is in contact with the valve seat to form sealing fit.
2. The bellows stop valve of claim 1, wherein: the valve clack main body is in threaded connection with a pre-tightening bolt, the pre-tightening bolt is arranged in the pressed inner ring in a penetrating mode and is propped against the bottom surface of the pressed inner ring, and a reserved gap is arranged between the top surface of the pressed inner ring and the valve clack main body.
3. The bellows stop valve according to claim 1 or 2, wherein: the expansion conical surface and the compression conical surface incline from the inlet to the valve rod direction to the central axis of the valve rod.
4. The bellows stop valve according to claim 1 or 2, wherein: the sealing conical surface is inclined outwards from the inlet to the valve rod.
5. The bellows stop valve according to claim 1 or 2, wherein: the expanding outer ring is made of polytetrafluoroethylene materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320179189.XU CN219299960U (en) | 2023-01-31 | 2023-01-31 | Bellows stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320179189.XU CN219299960U (en) | 2023-01-31 | 2023-01-31 | Bellows stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219299960U true CN219299960U (en) | 2023-07-04 |
Family
ID=86982309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320179189.XU Active CN219299960U (en) | 2023-01-31 | 2023-01-31 | Bellows stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219299960U (en) |
-
2023
- 2023-01-31 CN CN202320179189.XU patent/CN219299960U/en active Active
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