CN201531675U - Combined packing ring used for low-leakage valve - Google Patents
Combined packing ring used for low-leakage valve Download PDFInfo
- Publication number
- CN201531675U CN201531675U CN2009203111566U CN200920311156U CN201531675U CN 201531675 U CN201531675 U CN 201531675U CN 2009203111566 U CN2009203111566 U CN 2009203111566U CN 200920311156 U CN200920311156 U CN 200920311156U CN 201531675 U CN201531675 U CN 201531675U
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- Prior art keywords
- packing ring
- carbon fiber
- conical surface
- ring
- low
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- Expired - Lifetime
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- Details Of Valves (AREA)
Abstract
The utility model relates to a packing ring, in particular to a combined packing ring used for a low-leakage valve, mainly solving the problems that as the section of the packing ring existed in the prior art is rectangular, the radial flow of filler can not be compressed and controlled selectively, effective compensation can not be conducted under the working condition of temperature and pressure alternation, and the leakage rate index can not meet the international requirement of low-leakage design, and the like. The combined packing ring comprises carbon fiber weaving disc root rings (1), and is characterized in that two carbon fiber weaving disc root rings (1) are arranged, one or more pure graphite rings (2) which are stacked together are arranged between the two carbon fiber weaving disc root rings (1), the lower surface of one carbon fiber weaving disc root ring is a conical surface, and the upper surface of the other carbon fiber weaving disc root ring is a conical surface.
Description
Technical field
The utility model relates to a kind of packing ring, especially relate to a kind of to low leak valve with the isostructural improvement of combined packing ring.
Background technique
Common valve is unable to undergo washing away of high temperature, high pressure with seal ring and pushes, and can not compress and control the Radial Flow of filler selectively, can not effectively compensate under temperature and pressure alternation operating mode.Chinese patent discloses a kind of combined type self oiling, automatically stuffing box packing ring (notice of authorization number: CN 200986022Y), it has guide ring, the guide ring both sides have the combined stuffing ring body respectively, be radially distributed with a plurality of material guide holes above the guide ring, fluted respectively on the cylindrical of guide ring and the interior circle, the combined stuffing ring body is by the flexible graphite packing ring in guide ring both sides symmetric arrays successively, the polytetrafluoroethylene packing ring, high strength graphite mixed fillers ring is formed, guide ring, the flexible graphite packing ring, the polytetrafluoroethylene packing ring, high strength graphite mixed fillers ring is that two semi-ring bodies of z font face are pegged graft and constituted by plug surface respectively.But this structure is the same with combined packing with common valve, because its cross section is a rectangle, therefore can not compress and control the Radial Flow of filler selectively, under temperature and pressure alternation operating mode, can not effectively compensate, so its leak-down rate index does not reach low in the world at present leaky design requirement.
The model utility content
The utility model technical issues that need to address provide a kind of low leak valve combined packing ring, it mainly is to solve the existing in prior technology packing ring because its cross section is a rectangle, therefore can not compress and control the Radial Flow of filler selectively, under temperature and pressure alternation operating mode, can not effectively compensate, so its leak-down rate index does not reach at present the technical problem of low leaky design requirement in the world etc.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
Low leak valve combined packing ring of the present utility model, comprise carbon fiber knit packing ring, it is characterized in that described carbon fiber knit packing ring is two, be provided with the one or more pure graphite annulus that is superimposed between two carbon fiber knit packing rings, the lower surface of one of them carbon fiber knit packing ring is the conical surface, and the upper surface of another carbon fiber knit packing ring is the conical surface.The end ring up and down of packing ring adopts carbon fiber knit packing ring, has overcome and has only used the shortcoming that the Expanded graphite scour resistance is poor, intensity is low, thereby guaranteed the scour resistance of stuffing box packing under High Temperature High Pressure.
As preferably, the conicity angles alpha of described two carbon fiber knit packing annular conical surfaces is 30 °～60 °, and the upper and lower surface of Expanded graphite ring also is provided with the conical surface, and the conical surface on its conical surface and the carbon fiber knit packing ring is complementary.All be provided with the conical surface on carbon fiber knit packing ring and the pure graphite annulus, design specific sealing angle and gradient and seal the Radial Flow of compressing selectively and controlling filler, under temperature and pressure alternation operating mode, effectively compensate, realize the self-locking seal performance.
As preferably, described pure graphite annulus is three that are superimposed.The quantity of pure graphite annulus can be decided according to the length of valve rod, and valve rod is long more, and used pure graphite annulus is many more.
Therefore, the utlity model has the Radial Flow of optionally compressing and controlling filler, under temperature and pressure alternation operating mode, effectively compensate, realize the self-locking seal performance, simple and reasonable for structure, can reach the low characteristics such as requirement of leaking.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present utility model;
Accompanying drawing 2 is A-A cross-sectional view of Fig. 1.
Component, position and numbering among the figure: carbon fiber knit packing ring 1, pure graphite annulus 2.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the low leak valve combined packing ring of this example, as Fig. 1, Fig. 2, two carbon fiber knit packing rings 1 are arranged, being provided with 2, two carbon fiber knit packings of three the pure graphite annuluss ring that is superimposed between two carbon fiber knit packing rings all equates with the inside and outside wall diameter of three pure graphite annuluss.The lower surface of superposed carbon fiber knit packing ring is the conical surface, the upper surface that is positioned at the carbon fiber knit packing ring of bottom is the conical surface, the upper and lower surface of its excess-three pure graphite annulus 2 also is provided with the conical surface, the conical surface on the pure graphite annulus conical surface and the carbon fiber knit packing ring is complementary, and the conicity angles alpha of the conical surface is 45 °.
During use, the utility model packed into to get final product on the valve rod in the valve body.
Applicable temperature of the present utility model is-200 ℃～650 ℃, is-200 ℃～455 ℃ in air, and pressure＜60Mpa, pH value are 0～14 (except the strong oxidizer), leak-down rate≤4.6 * 10
-7Cm
3/ s.
Claims (3)
1. low leak valve combined packing ring, comprise carbon fiber knit packing ring (1), it is characterized in that described carbon fiber knit packing ring (1) is two, be provided with the one or more pure graphite annulus (2) that is superimposed between two carbon fiber knit packing rings, the lower surface of one of them carbon fiber knit packing ring is the conical surface, and the upper surface of another carbon fiber knit packing ring is the conical surface.
2. low leak valve combined packing ring according to claim 1, the conicity angles alpha that it is characterized in that described two carbon fiber knit packing rings (1) conical surface is 30 °～60 °, the upper and lower surface of pure graphite annulus (2) also is provided with the conical surface, and the conical surface on its conical surface and the carbon fiber knit packing ring is complementary.
3. low leak valve combined packing ring according to claim 1 and 2 is characterized in that described pure graphite annulus (2) is three that are superimposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203111566U CN201531675U (en) | 2009-09-23 | 2009-09-23 | Combined packing ring used for low-leakage valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203111566U CN201531675U (en) | 2009-09-23 | 2009-09-23 | Combined packing ring used for low-leakage valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531675U true CN201531675U (en) | 2010-07-21 |
Family
ID=42527079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203111566U Expired - Lifetime CN201531675U (en) | 2009-09-23 | 2009-09-23 | Combined packing ring used for low-leakage valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531675U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759012A (en) * | 2014-01-23 | 2014-04-30 | 章华 | Low-leakage composite forming flexible graphite padding |
| CN104154243A (en) * | 2014-06-19 | 2014-11-19 | 宁波天生密封件有限公司 | Sealing method of compression padding with density gradient and compression padding produced according to method |
| CN107061855A (en) * | 2017-05-17 | 2017-08-18 | 南通艾迈特机械有限公司 | A kind of valve output shaft seal structure |
-
2009
- 2009-09-23 CN CN2009203111566U patent/CN201531675U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759012A (en) * | 2014-01-23 | 2014-04-30 | 章华 | Low-leakage composite forming flexible graphite padding |
| CN103759012B (en) * | 2014-01-23 | 2016-07-06 | 章华 | A kind of low leakage combination forming filler of soft graphite |
| CN104154243A (en) * | 2014-06-19 | 2014-11-19 | 宁波天生密封件有限公司 | Sealing method of compression padding with density gradient and compression padding produced according to method |
| CN107061855A (en) * | 2017-05-17 | 2017-08-18 | 南通艾迈特机械有限公司 | A kind of valve output shaft seal structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170214 Address after: 311255 Hangzhou Town, Xiaoshan District, Zhejiang, Pu Yang Town, Taoyuan Patentee after: Zhejiang Guotai Xiao Xing sealing material Limited by Share Ltd Address before: 311255 Zhejiang, Xiaoshan City, the town of Yang Yang Lake Village Patentee before: Guotai Seal Material Co., Ltd., Zhejiang Prov. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100721 |