CN205001654U - Soft seal structure of low temperature valve - Google Patents
Soft seal structure of low temperature valve Download PDFInfo
- Publication number
- CN205001654U CN205001654U CN201520724127.8U CN201520724127U CN205001654U CN 205001654 U CN205001654 U CN 205001654U CN 201520724127 U CN201520724127 U CN 201520724127U CN 205001654 U CN205001654 U CN 205001654U
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- Prior art keywords
- valve
- valve body
- low temperature
- base portion
- retaining ring
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Abstract
The utility model provides a soft seal structure of low temperature valve, including valve body, valve rod, valve plate, retaining ring and disk seat, the disk seat is located between retaining ring, valve body and the valve plate, the disk seat includes base portion and extension, base portion presss from both sides and locates between retaining ring, valve body and the valve plate, the extension clamp is located the retaining ring with between the valve body, the bottom surface orientation of base portion the valve plate is protruding, the extension is located one side of the upper surface of base portion. The utility model discloses soft seal structure of low temperature valve, its disk seat include base portion and extension, and base portion presss from both sides and locates between retaining ring, valve body and the valve plate, the extension clamp is located the retaining ring with between the valve body, thereby the disk seat forms good sealing, can avoid the low temperature dielectric leakage, and low temperature condition is difficult for down losing sealing performance because of warping.
Description
Technical field
The utility model relates to valve seal technical field, particularly relates to a kind of Subzero valve soft sealing structure.
Background technique
Subzero valve is applied to cut-off, the shunting of the cryogenic medias such as liquefied ammonia, liquid nitrogen, LNG Liquefied natural gas usually.Existing Subzero valve sealing configuration adopts soft sealing structure usually, and increases metal hard sealing structure outward at soft sealing structure, and usual structure is comparatively complicated, manufactures difficulty, cost intensive.
Model utility content
The purpose of this utility model is to provide a kind of Subzero valve soft sealing structure, only adopts single soft seal valve seat, can realize sealability outstanding at low ambient temperatures.
In order to achieve the above object, the utility model provides a kind of Subzero valve soft sealing structure, comprise valve body, valve plate, back-up ring and valve seat, described valve seat is located at described back-up ring, between valve body and valve plate, described valve seat comprises base part and extension part, and described base part is located in described back-up ring, between valve body and valve plate, described extension part is located between described back-up ring and described valve body, the bottom surface of described base part is protruding towards described valve plate, and described extension part is located at the side of the upper surface of described base part.
Further, the cross section of described valve seat is L-shaped.
Further, the thickness of described base part is greater than the thickness of described extension part, and the width of described base part is greater than the thickness of described extension part.
Further, the corresponding described valve seat of described back-up ring is provided with the first groove.
Further, the corresponding described valve seat of described valve body is provided with the second groove.
Further, described valve seat is made up of polychlorotrifluoroethylene.
Compared with prior art, the beneficial effect of the technical program is:
The utility model Subzero valve sealing configuration, structure is simple, manufacture difficulty is little, sealing excellent effect, its valve seat comprises base part and extension part, and base part is located in described back-up ring, between valve body and valve plate, extension part is located between described back-up ring and described valve body, thus described valve seat forms good sealing, cryogenic media can be avoided to leak, and not easily lose sealability because of distortion under cryogenic conditions (-196 DEG C).
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model Subzero valve sealing configuration.
Embodiment
Below in conjunction with accompanying drawing, by specific embodiment, clear, complete description is carried out to the technical solution of the utility model.
Refer to shown in Fig. 1, the utility model provides a kind of Subzero valve soft sealing structure, comprise valve body 1, valve rod 2, valve plate 3, back-up ring 4 and valve seat 5, described valve seat 5 is located at described back-up ring 4, between valve body 1 and valve plate 3, described valve seat 5 comprises base part 51 and extension part 52, described base part 51 is located in described back-up ring 4, between valve body 1 and valve plate 3, described extension part 52 is located between described back-up ring 4 and described valve body 1, the bottom surface of described base part 51 is protruding towards described valve plate 3, described extension part 52 is located at the side of the upper surface of described base part 51, thus described valve seat 5 forms good sealing, cryogenic media can be avoided to leak, and not easily lose sealability because of distortion under cryogenic conditions.The utility model only needs single valve seat 5 can form good sealing, and not needing increases Structural Hardware, and structure is simple, is beneficial to production and processing, and then is beneficial to and reduces costs.
The cross section of described valve seat 5 is L-shaped, and structure is simple, is beneficial to valve seat 5 and fits tightly with back-up ring 4, valve body 1, valve plate 3, form good sealing.The thickness of described base part 51 is greater than the thickness of described extension part 52, the width of described base part 51 is greater than the thickness of described extension part 52 simultaneously, no matter thus the base part 51 of valve seat 5 can keep enough elasticity under normal temperature or low temperature, that guarantees that structure can be permanent plays seal action.
The corresponding described valve seat 5 of described back-up ring 4 is provided with the first groove 41, for accommodating the base part 51 of valve seat 5.The corresponding described valve seat 5 of described valve body 1 is provided with the second groove 11, for accommodating the extension part 52 of valve seat 5.
Described valve seat 5 is made up of polychlorotrifluoroethylene (PCTFE), good sealing effect and be applicable to low temperature environment, not easily hardening under cryogenic, guarantees that sealing effect is good.
Although the utility model with preferred embodiment openly as above; but it is not for limiting the utility model; any those skilled in the art are not departing from spirit and scope of the present utility model; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solutions of the utility model; therefore; every content not departing from technical solutions of the utility model; the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all belong to the protection domain of technical solutions of the utility model.
Claims (6)
1. a Subzero valve soft sealing structure, it is characterized in that, comprise valve body, valve plate, back-up ring and valve seat, described valve seat is located at described back-up ring, between valve body and valve plate, described valve seat comprises base part and extension part, and described base part is located in described back-up ring, between valve body and valve plate, described extension part is located between described back-up ring and described valve body, the bottom surface of described base part is protruding towards described valve plate, and described extension part is located at the side of the upper surface of described base part.
2. Subzero valve soft sealing structure as claimed in claim 1, it is characterized in that, the cross section of described valve seat is L-shaped.
3. Subzero valve soft sealing structure as claimed in claim 1, it is characterized in that, the thickness of described base part is greater than the thickness of described extension part, and the width of described base part is greater than the thickness of described extension part.
4. Subzero valve soft sealing structure as claimed in claim 1, is characterized in that, the corresponding described valve seat of described back-up ring is provided with the first groove.
5. Subzero valve soft sealing structure as claimed in claim 1, is characterized in that, the corresponding described valve seat of described valve body is provided with the second groove.
6. Subzero valve soft sealing structure as claimed in claim 1, it is characterized in that, described valve seat is made up of polychlorotrifluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520724127.8U CN205001654U (en) | 2015-09-17 | 2015-09-17 | Soft seal structure of low temperature valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520724127.8U CN205001654U (en) | 2015-09-17 | 2015-09-17 | Soft seal structure of low temperature valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205001654U true CN205001654U (en) | 2016-01-27 |
Family
ID=55158542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520724127.8U Active CN205001654U (en) | 2015-09-17 | 2015-09-17 | Soft seal structure of low temperature valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205001654U (en) |
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2015
- 2015-09-17 CN CN201520724127.8U patent/CN205001654U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |