CN203147018U - Ultralow-temperature valve and valve rod triple sealing structure - Google Patents
Ultralow-temperature valve and valve rod triple sealing structure Download PDFInfo
- Publication number
- CN203147018U CN203147018U CN 201320039638 CN201320039638U CN203147018U CN 203147018 U CN203147018 U CN 203147018U CN 201320039638 CN201320039638 CN 201320039638 CN 201320039638 U CN201320039638 U CN 201320039638U CN 203147018 U CN203147018 U CN 203147018U
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- valve
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- sealing
- valve rod
- ultralow
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Abstract
An embodiment of the utility model discloses an ultralow-temperature valve triple sealing structure which comprises a valve body and a valve rod. A spring continuously exerts pressure on a first sealing PCTPE packing layer through medium pressure to achieve the effect of self-fastening sealing, a second sealing layer is an O-shaped ring sealing layer, and a third sealing layer is a shaped packing sealing layer, namely a flexible graphite layer, so that the aim of safe and waterproof sealing can be achieved.
Description
Technical field
The utility model relates to a kind of valve rod sealing configuration, relates in particular to a kind of Cryogenic valve valve rod triple seal structure.
Background technique
At present, the domestic Cryogenic valve Stuffing box that manufactures and designs is generally one sealing or two seals structure, and the filler place still has the seepage situation.
The model utility content
The utility model embodiment technical problem to be solved is, provides the valve stem seal effect under a kind of worst cold case remarkable, has reached the Cryogenic valve valve rod triple seal structure of the requirement of tiny leakage standard.
Described Cryogenic valve valve rod triple seal structure, it comprises a valve body and valve rod, described valve body and valve rod joint are disposed with spring, the first resealing layer, second resealing layer and the triple seal layer.
Wherein, the described first resealing layer is PCTFE packing seal layer.
The described second resealing layer is " O " RunddichtringO.
Described triple seal layer is the Expanded graphite sealing layer.
Implement the utility model embodiment, have following beneficial effect:
Present embodiment is multiple-sealed in the design of traditional design basis, guarantees the zero leakage at Cryogenic valve valve rod place and reaches the low temperature flameproof effect.
Description of drawings
Fig. 1 is the utility model Cryogenic valve valve rod triple seal structure example structure schematic representation.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is Cryogenic valve triple seal structural representation, comprise valve body 1 and valve rod 2, as shown in FIG., spring 3 utilizes pressure medium to continue to apply pressure to first road sealing PCTFE packing layer 4 and reaches the self-tightening sealing effect, and second road is sealed into the sealing of O type circle, see O RunddichtringO 5, three seals shaped packing seal, stuffing box packing are Expanded graphite layer 6, reach sealingly secure fire prevention purpose with this.
Above disclosed only is a kind of preferred embodiment of the utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (4)
1. Cryogenic valve valve rod triple seal structure, it comprises a valve body (1) and valve rod (2), it is characterized in that described valve body (1) and valve rod (2) joint are disposed with spring (3), the first resealing layer (4), second resealing layer (5) and the triple seal layer (6).
2. Cryogenic valve valve rod triple seal structure according to claim 1 is characterized in that, the described first resealing layer (4) is PCTFE packing seal layer.
3. Cryogenic valve valve rod triple seal structure according to claim 1 is characterized in that, the described second resealing layer (5) is " O " RunddichtringO.
4. Cryogenic valve valve rod triple seal structure according to claim 1 is characterized in that described triple seal layer (6) is the Expanded graphite sealing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320039638 CN203147018U (en) | 2013-01-24 | 2013-01-24 | Ultralow-temperature valve and valve rod triple sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320039638 CN203147018U (en) | 2013-01-24 | 2013-01-24 | Ultralow-temperature valve and valve rod triple sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203147018U true CN203147018U (en) | 2013-08-21 |
Family
ID=48974541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320039638 Expired - Lifetime CN203147018U (en) | 2013-01-24 | 2013-01-24 | Ultralow-temperature valve and valve rod triple sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203147018U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100418A (en) * | 2014-07-08 | 2014-10-15 | 无锡隆盛科技股份有限公司 | Pressure relief structure of electric EGR (exhaust gas recirculation) valve |
-
2013
- 2013-01-24 CN CN 201320039638 patent/CN203147018U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100418A (en) * | 2014-07-08 | 2014-10-15 | 无锡隆盛科技股份有限公司 | Pressure relief structure of electric EGR (exhaust gas recirculation) valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Song Xiu road Qingpu Industrial Park Qingpu District Shanghai City, No. 399, 201703 Patentee after: NAFUXI (SHANGHAI) VALVE TECHNOLOGY CO.,LTD. Address before: Song Xiu road Qingpu Industrial Park Qingpu District Shanghai City, No. 399, 201703 Patentee before: SHANGHAI NORTH AMERICAN VALVE Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |