CN220416268U - Low-temperature butterfly valve convenient to seal and adjust - Google Patents
Low-temperature butterfly valve convenient to seal and adjust Download PDFInfo
- Publication number
- CN220416268U CN220416268U CN202322032123.0U CN202322032123U CN220416268U CN 220416268 U CN220416268 U CN 220416268U CN 202322032123 U CN202322032123 U CN 202322032123U CN 220416268 U CN220416268 U CN 220416268U
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- threaded hole
- valve seat
- seat
- screw
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- 238000007789 sealing Methods 0.000 claims abstract description 39
- 230000007423 decrease Effects 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 4
- 239000003949 liquefied natural gas Substances 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The utility model provides a low-temperature butterfly valve convenient for sealing adjustment, which comprises: the valve comprises a valve body, a valve rod, a valve seat and a valve plate assembly, wherein a medium flow channel is formed in the valve seat, the valve plate assembly is arranged in the medium flow channel, one end of the valve rod sequentially penetrates through the valve body and the valve plate assembly and then is connected with the valve body, the valve seat is arranged on the valve body, and the valve seat is matched with the valve plate assembly to form a sealing pair; the valve seat is provided with a first threaded hole and a second threaded hole, the valve body is provided with a third threaded hole corresponding to the second threaded hole, a first screw is arranged in the first threaded hole, a second screw is arranged in the second threaded hole, and the second screw penetrates through the second threaded hole and then is connected with the third threaded hole. The setting of first screw realizes the mounted position adjustment of disk seat on the valve body, and then realizes the sealed specific pressure adjustment between disk seat and the valve plate assembly, adjusts conveniently and need not to dismantle the butterfly valve from the scene at the in-process of adjustment.
Description
Technical Field
The utility model belongs to the technical field of butterfly valve sealing, and particularly relates to a low-temperature butterfly valve convenient to seal and adjust.
Background
LNG (liquefied natural gas) low-temperature butterfly valve is more and more widely used along with expansion of LNG receiving stations, however, when leakage exceeds standard in the conventional LNG low-temperature butterfly valve using a triple eccentric structure, a new sealing ring is often required to be polished again for installation or replacement so as to adjust the sealing performance between the sealing ring and a valve seat on the butterfly valve, and the adjustment process is complex.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an object of the present utility model is to provide a low temperature butterfly valve that facilitates seal adjustment to solve the above-described problems.
In order to achieve the above and other related objects, the utility model provides a low-temperature butterfly valve convenient for sealing adjustment, which comprises a valve body, a valve rod, a valve seat and a valve plate assembly, wherein a medium flow passage is formed on the valve seat; the valve seat is provided with a first threaded hole and a second threaded hole, the valve body is provided with a third threaded hole corresponding to the second threaded hole, a first screw is arranged in the first threaded hole, a second screw is arranged in the second threaded hole, and the second screw penetrates through the second threaded hole and then is connected with the third threaded hole.
Optionally, the first threaded hole and the second threaded hole are uniformly formed along the circumferential direction of the valve seat.
Optionally, the first threaded holes and the second threaded holes are arranged in a one-to-one correspondence manner, and the second threaded holes are arranged beside the corresponding first threaded holes.
Optionally, the distance between the first threaded hole and the center of the valve seat is consistent with the distance between the second threaded hole and the center of the valve seat.
Optionally, a step groove for installing the valve seat is formed in the valve body, and a first sealing ring is arranged between a step surface of the step groove and the valve seat.
Optionally, the valve plate assembly includes valve plate, second sealing washer and is used for with the second sealing washer compresses tightly the clamp plate of fixing on the valve plate, the second sealing washer with the disk seat cooperation forms sealed pair.
Optionally, the media flow path includes an inlet end and an outlet end, and the valve seat is located between the valve body and the valve stem.
Optionally, the second threaded hole is a counter bore, and the first screw is a flat-end set screw for fully entering the first threaded hole.
Optionally, the valve seat is in slant fit with the second sealing ring, from the inlet end to the outlet end, the inner diameter of the valve seat is gradually reduced, and the outer diameter of the second sealing ring is gradually reduced.
Optionally, the first sealing ring is a spring energy storage sealing ring.
As described above, the low-temperature butterfly valve convenient to seal and adjust has the following beneficial effects:
in the scheme, the second screw is unscrewed, so that the second screw exits the corresponding third threaded hole, then the first screw is screwed into the valve seat, the valve seat is ejected out in the direction away from the valve body, the sealing specific pressure between the valve seat and the valve plate assembly is adjusted, and the second screw is screwed into the third threaded hole after the adjustment. The second threaded holes, the third threaded holes and the second screws are arranged, so that the diameter of the valve seat is fixed on the valve body, and the valve body and the valve seat are fixed without additionally arranging a pressing plate, a flange and the like. The setting of first screw realizes the mounted position adjustment of disk seat on the valve body, and then realizes the sealed specific pressure adjustment between disk seat and the valve plate assembly, adjusts conveniently and need not to dismantle the butterfly valve from the scene at the in-process of adjustment.
Drawings
FIG. 1 is a schematic diagram of a low temperature butterfly valve that facilitates seal adjustment in an embodiment of the utility model.
Fig. 2 is an enlarged view at a in fig. 1.
FIG. 3 is a schematic view of a partial connection between a valve body and a valve seat in an embodiment of the present utility model.
FIG. 4 is a schematic diagram of a valve seat according to an embodiment of the present utility model.
Detailed Description
Reference numerals in the drawings of the specification include: the valve comprises a valve body 1, a valve rod 2, a valve seat 3, a valve plate 4, a pressing plate 5, a second sealing ring 6, a first sealing ring 7, a first screw 8, a second screw 9, a first threaded hole 10 and a second threaded hole 11.
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
The application discloses a low temperature butterfly valve convenient to seal and adjust, and reference is made to fig. 1 and fig. 4.
In an exemplary embodiment of the present application, there is provided a low temperature butterfly valve facilitating seal adjustment, comprising: the valve comprises a valve body 1, a valve rod 2, a valve seat 3 and a valve plate assembly, wherein a medium flow channel is formed in the valve seat 3, the valve plate assembly is arranged in the medium flow channel, one end of the valve rod 2 sequentially penetrates through the valve body 1 and the valve plate assembly and then is connected with the valve body 1, the valve seat 3 is arranged on the valve body 1, and the valve seat 3 and the valve plate assembly are matched to form a sealing pair; the valve seat 3 is provided with a first threaded hole 10 and a second threaded hole 11, the valve body 1 is provided with a third threaded hole corresponding to the second threaded hole 11, the first threaded hole 10 is internally provided with a first screw 8, the second threaded hole 11 is internally provided with a second screw 9, and the second screw 9 penetrates through the second threaded hole 11 and then is connected with the third threaded hole.
In this embodiment, by unscrewing the second screw 9, the second screw 9 is led to withdraw from the corresponding third threaded hole, and then the first screw 8 is screwed into the valve seat 3, so that the valve seat 3 is ejected out in a direction away from the valve body 1, and the sealing specific pressure between the valve seat 3 and the valve plate assembly is adjusted, and after the adjustment, the second screw 9 is screwed into the third threaded hole. The second threaded hole 11, the third threaded hole and the second screw 9 are arranged, so that the diameter of the valve seat 3 is fixed on the valve body 1, and the valve body 1 and the valve seat 3 are fixed without additionally arranging a pressing plate 5, a flange and the like. The setting of the first screw 8 realizes the adjustment of the installation position of the valve seat 3 on the valve body 1, and then realizes the adjustment of the sealing specific pressure between the valve seat 3 and the valve plate assembly, and the adjustment is convenient and the butterfly valve is not required to be detached from the site in the adjustment process.
In an exemplary embodiment, the first and second screw holes 10 and 11 are uniformly opened along the circumferential direction of the valve seat 3.
In this embodiment, the first threaded hole 10 and the second threaded hole 11 are uniformly formed along the circumferential direction of the valve seat 3, so as to realize stable fixation between the valve body 1 and the valve seat 3, and simultaneously, facilitate adjustment of the sealing specific pressure between any position of the circumference of the valve seat 3 and the valve plate assembly.
In an exemplary embodiment, the first screw holes 10 and the second screw holes 11 are provided in one-to-one correspondence, and the second screw holes 11 are provided beside the corresponding first screw holes 10.
In this embodiment, a first threaded hole 10 and a second threaded hole 11 are formed as a group, and the first threaded hole 10 and the second threaded hole 11 in each group are disposed adjacently so as to achieve the seal specific pressure adjustment between the valve seat 3 and the valve plate assembly.
The second threaded hole 11 may also be arranged between two adjacent first threaded holes 10, for example.
In an exemplary embodiment, in order to better achieve the seal specific pressure adjustment between the valve seat 3 and the valve plate assembly, the center distance of the first threaded hole 10 from the valve seat 3 is consistent with the center distance of the second threaded hole 11 from the valve seat 3.
In an exemplary embodiment, the valve body 1 is provided with a stepped groove for mounting the valve seat 3, and a first sealing ring 7 is arranged between the stepped surface of the stepped groove and the valve seat 3.
The first sealing ring 7 is arranged to realize the sealing between the valve seat 3 and the valve body 1.
In an exemplary embodiment, the valve plate assembly includes a valve plate 4, a second sealing ring 6, and a pressing plate 5 for pressing and fixing the second sealing ring 6 on the valve plate 4, where the second sealing ring 6 cooperates with the valve seat 3 to form a sealing pair.
In the present embodiment, the sealing between the valve plate 4 and the valve seat 3 is achieved by the arrangement of the second sealing ring 6, and the fixation of the sealing ring on the valve plate 4 is achieved by the arrangement of the pressing plate 5.
In an exemplary embodiment, the media flow path includes an inlet end and an outlet end, with a valve seat 3 positioned between the valve body 1 and the valve stem 2.
Illustratively, the valve seat 3 is located between the valve body 1 and the valve stem 2, and the valve seat 3 is limited by the valve stem 2 and the valve body 1.
In an exemplary embodiment, the second threaded bore 11 is a counter bore and the first screw 8 is a flat end set screw for full access to the first threaded bore 10.
In this embodiment, the first screw 8 is a flat-ended set screw that extends entirely into the first threaded bore 10, reducing the likelihood of loosening during medium flow.
In an exemplary embodiment, the valve seat 3 is in a beveled fit with the second seal ring 6, the inner diameter of the valve seat 3 gradually decreasing from the inlet end to the outlet end, and the outer diameter of the second seal ring 6 gradually decreasing.
In the present embodiment, as the valve seat 3 is away from the valve body 1, the sealing specific pressure between the valve seat 3 and the second seal ring 6 is greater.
In an exemplary embodiment, the first seal ring is a spring energy storage seal ring.
In this embodiment, the first sealing ring 7 is a spring-loaded sealing ring in order to achieve a better sealing when adjusting the position of the valve seat 3 on the valve body 1.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model, and it is intended that the appended claims be interpreted as covering all equivalent modifications and variations as fall within the true spirit and scope of the utility model.
Claims (10)
1. A low temperature butterfly valve facilitating seal adjustment, comprising: the valve comprises a valve body, a valve rod, a valve seat and a valve plate assembly, wherein a medium flow channel is formed in the valve seat, the valve plate assembly is arranged in the medium flow channel, one end of the valve rod sequentially penetrates through the valve body and the valve plate assembly and then is connected with the valve body, the valve seat is arranged on the valve body, and the valve seat is matched with the valve plate assembly to form a sealing pair; the valve seat is provided with a first threaded hole and a second threaded hole, the valve body is provided with a third threaded hole corresponding to the second threaded hole, a first screw is arranged in the first threaded hole, a second screw is arranged in the second threaded hole, and the second screw penetrates through the second threaded hole and then is connected with the third threaded hole.
2. The low temperature butterfly valve of claim 1, wherein the first threaded bore and the second threaded bore are uniformly open along a circumference of the valve seat.
3. The low temperature butterfly valve of claim 1, wherein the first threaded holes and the second threaded holes are arranged in a one-to-one correspondence, and the second threaded holes are arranged beside the corresponding first threaded holes.
4. The low temperature butterfly valve of claim 1, wherein the first threaded bore is a consistent distance from the center of the valve seat as the second threaded bore is from the center of the valve seat.
5. The low-temperature butterfly valve convenient to seal and adjust according to claim 1, wherein a step groove for installing the valve seat is formed in the valve body, and a first sealing ring is arranged between a step surface of the step groove and the valve seat.
6. The low temperature butterfly valve of claim 5, wherein the valve plate assembly includes a valve plate, a second seal ring, and a pressure plate for compressing and securing the second seal ring to the valve plate, the second seal ring cooperating with the valve seat to form the sealing pair.
7. The low temperature butterfly valve of claim 6, wherein the media flow path includes an inlet end and an outlet end, the valve seat being positioned between the valve body and the valve stem.
8. The low temperature butterfly valve of claim 1, wherein the second threaded bore is a counterbore and the first screw is a flat end set screw for full access to the first threaded bore.
9. The low temperature butterfly valve of claim 7, wherein the valve seat is in beveled engagement with the second seal ring, the valve seat having an inner diameter that gradually decreases from the inlet end to the outlet end, and the second seal ring having an outer diameter that gradually decreases.
10. The low temperature butterfly valve of claim 7, wherein the first seal ring is a spring-loaded seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322032123.0U CN220416268U (en) | 2023-07-31 | 2023-07-31 | Low-temperature butterfly valve convenient to seal and adjust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322032123.0U CN220416268U (en) | 2023-07-31 | 2023-07-31 | Low-temperature butterfly valve convenient to seal and adjust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220416268U true CN220416268U (en) | 2024-01-30 |
Family
ID=89643902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322032123.0U Active CN220416268U (en) | 2023-07-31 | 2023-07-31 | Low-temperature butterfly valve convenient to seal and adjust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220416268U (en) |
-
2023
- 2023-07-31 CN CN202322032123.0U patent/CN220416268U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |