CN202402783U - Valve with dual-seal structure - Google Patents
Valve with dual-seal structure Download PDFInfo
- Publication number
- CN202402783U CN202402783U CN2012200025128U CN201220002512U CN202402783U CN 202402783 U CN202402783 U CN 202402783U CN 2012200025128 U CN2012200025128 U CN 2012200025128U CN 201220002512 U CN201220002512 U CN 201220002512U CN 202402783 U CN202402783 U CN 202402783U
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- Prior art keywords
- valve
- valve rod
- bellows
- filler
- packing
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- Expired - Fee Related
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Abstract
The utility model discloses a valve with a dual-seal structure, which comprises a valve body. A valve cavity is formed in the valve body; a valve rod is arranged in the valve cavity; a self-sealing device and a bellows sealing device are respectively arranged outside the valve rod; the self-sealing device comprises a packing box; the packing box is sleeved outside the valve rod and a packing cavity is formed by the packing box and the outer side wall of the valve rod; packings are arranged in the packing cavity; a packing gland is arranged outside the packing box; the bellows sealing device comprises a ripple desk tray and a bellows which are respectively sleeved outside the valve rod; the ripple desk tray is fixedly matched with the inner side wall of the valve cavity; and one end of the bellows and the ripple desk tray are fixedly sealed and the other end and the valve rod are fixedly sealed. The device disclosed by the utility model adopts a dual-seal structure; the defect of leakage of the valve rod is completely overcome; due to the use of the bellows sealing device, the direct contact between a low temperature medium and the packings is obstructed, so that the packing is effectively prevented from being frozen to lock the valve rod; and when the bellows is broken, the valve can also be enabled to normally work in a certain time period by the dual-seal structure and sufficient time is brought to overhauling.
Description
Technical field
The utility model is specifically related to the technical field of sealing technology of valve body, is specifically related to a kind of valve with double sealing structure.
Background technique
Valve all has purposes extremely widely in industrial and agricultural production, daily life, be used to transmit poisonous and existing valve for some and require its valve rod position to have fabulous sealability usually, to prevent the leakage of active principle.The valve rod of traditional valve adopts packing seal usually, this valve in use for some time because aging; Problems such as dripping, leak, emit takes place in valve rod place easily, and the leakage of filler valve may cause the leakage of some poisonous dangerous substances, simultaneously; The leakage of material also can cause environmental problem, and, adopt stuffing seal that cryogenic media is directly contacted with filler; The filler locking valve rod that can freeze causes the valve can't proper functioning.The valve of existing technology also has the bellow seal of employing that valve rod is sealed, but this valve only adopts the sylphon seal structure, after the sylphon seal structural failure, can cause the leakage of valve rod.
Summary of the invention
The purpose of the utility model is: to the deficiency of existing technology, the utility model provides the valve of the band double sealing structure of a kind of good sealing effect, long service life.
To achieve these goals, the technological scheme below the utility model has adopted:
A kind of valve with double sealing structure comprises valve body, is provided with valve pocket in the valve body; Be provided with valve rod in the described valve pocket, described valve rod is respectively equipped with self-seal device and bellow seal outward, and described self-seal device comprises the stuffing box that is arranged in the valve pocket; Described stuffing box is set in outside the valve rod, and forms packing cavity with the outer side wall of valve rod, is provided with filler in the described packing cavity; Stuffing box is provided with Gland outward; Described bellow seal comprises ripple platform dish and bellows, and described ripple platform dish and bellows are set in respectively outside the valve rod, and described ripple platform dish cooperates with the fixed installation of valve pocket madial wall; Described bellows one end and ripple platform dish fixed seal connection, the bellows the other end and valve rod fixed seal connection.
As preferably; Be provided with two place's fillers in the described packing cavity; Be provided with the filler spacer between two place's fillers; Described filler lays respectively at the top and the bottom of packing cavity, is provided with packing ring between the filler at said packing cavity top and Gland, and the filler of described packing cavity at and packing cavity bottom are provided with packing ring.
After adopting above-mentioned preferred version, the self-seal device of the utility model is provided with two place's fillers, adopts the filler spacer to isolate between filler and the filler, and the sealing effect of valve rod is better.
As preferably, described filler is provided with the packing seal circle.After adopting above-mentioned preferred version, the sealing effect of the madial wall of filler and packing cavity is better, avoids the leakage of valve.
As preferably, be provided with the O RunddichtringO between the outer side wall of said valve rod and the filler spacer, be provided with the O RunddichtringO between the madial wall of described packing cavity and the filler spacer.
After adopting above-mentioned preferred version, the filler spacer respectively with the setting that is sealed and matched of packing cavity madial wall and valve rod outer side wall, the sealing effect of valve rod is better, longer service life.
As preferably, described valve body comprises upper valve body and following valve body, and described self-seal device is arranged in the upper valve body, and described bellow seal is arranged at down in the valve body.
After adopting above-mentioned preferred version, the structure of valve is more compact.
As preferably, described valve rod is provided with the bellows fixed block away from an end of ripple platform dish, and the two ends of described bellows are provided with welding block, and described welding block is provided with ripple platform dish and the welding of bellows fixed block respectively, forms said fixing and is tightly connected.
After adopting above-mentioned preferred version, the sealing effect of bellows and valve rod is better, improves the working life of valve.
The valve of the band double sealing structure of the utility model adopts double sealing structure, comprises self-seal device and bellow seal, has overcome the single characteristics of traditional valve rod leak-proof structure; Effected a radical cure the shortcoming that valve rod leaks, made environment health more, wherein; The use of bellow seal has intercepted cryogenic media and has contacted with the direct of filler, effectively prevents the filler locking valve rod that freezes, in addition; Stuffing seal cooperates with bellow seal; When breakage takes place bellows, also can guarantee valve proper functioning in a period of time, for maintenance brings time enough.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation;
Fig. 2 is the structural representation of the utility model embodiment self-seal device;
Fig. 3 is the structural representation of the utility model embodiment bellow seal.
Embodiment
Like Fig. 1, Fig. 2 and shown in Figure 3, the utility model embodiment specifically is a kind of valve with double sealing structure, comprises valve body 1, and valve body comprises upper valve body 11 and following valve body 12, and upper valve body 11 and following valve body 12 mode through bolt fixedly mounts and is connected.Be provided with valve pocket in the valve body 1, valve pocket correspondingly comprises uuper valve chamber 111 and lower valve chamber 121.The valve body 1 outer valve gap 2 that is provided with.Be provided with valve rod 3 in the valve pocket.Valve rod 3 outer self-seal device 4 and the bellow seal 5 of being respectively equipped with, self-seal device 4 is arranged in the upper valve body 11, and bellow seal 5 is arranged at down in the valve body 12.
Self-seal device 4 comprises the stuffing box 41 that is arranged in the valve pocket, and stuffing box 41 is set in outside the valve rod 3, and forms packing cavity 42 with the outer side wall of valve rod 3, is provided with filler 43 in the packing cavity 42, the stuffing box 42 outer Glands 44 that are provided with.Gland 44 is set in outside the valve rod 3, is provided with dust ring 6 between side that Gland 44 is outer and the valve rod 2.Be provided with two place's fillers 43 in the packing cavity 42; Be provided with filler spacer 45 between two place's fillers 43; Filler 43 lays respectively at the top and the bottom of packing cavity 42; 44 of the filler 43 at packing cavity 42 tops and Glands are provided with packing ring 46, and the filler 43 and packing cavity 42 bottoms of packing cavity 42 at are provided with packing ring 46.Filler 43 is provided with packing seal circle 431.Be provided with O RunddichtringO 451 between the outer side wall of valve rod 3 and the filler spacer 45, be provided with O RunddichtringO 451 between the madial wall of packing cavity 2 and the filler spacer 45.
Bellow seal 5 comprises ripple platform dish 51 and bellows 52; Ripple platform dish 51 is set in respectively outside the valve rod 3 with bellows 52; Ripple platform dish 51 cooperates with the fixed installation of lower valve chamber 121 madial walls; Bellows 52 1 ends and 51 fixed seal connections of ripple platform dish, bellows 52 the other ends and valve rod 3 fixed seal connections.Valve rod 3 is provided with bellows fixed block 53 away from an end of ripple platform dish 51, and the two ends of bellows 52 are provided with welding block 54, and 53 welding are provided with welding block 54 with the bellows fixed block with ripple platform dish 51 respectively, form said fixing and are tightly connected.
The work of the working principle of the valve of the double sealing structure of the utility model and the valve of existing technology is away from basic identical; Difference is: the valve of the double sealing structure of the utility model adopts self-seal device and bellow seal double seal, and sealing effect is better.
Claims (6)
1. the valve with double sealing structure comprises valve body, is provided with valve pocket in the valve body; Be provided with valve rod in the described valve pocket, it is characterized in that: described valve rod is respectively equipped with self-seal device and bellow seal outward, and described self-seal device comprises the stuffing box that is arranged in the valve pocket; Described stuffing box is set in outside the valve rod, and forms packing cavity with the outer side wall of valve rod, is provided with filler in the described packing cavity; Stuffing box is provided with Gland outward; Described bellow seal comprises ripple platform dish and bellows, and described ripple platform dish and bellows are set in respectively outside the valve rod, and described ripple platform dish cooperates with the fixed installation of valve pocket madial wall; Described bellows one end and ripple platform dish fixed seal connection, the bellows the other end and valve rod fixed seal connection.
2. the valve of band double sealing structure according to claim 1; It is characterized in that: be provided with two place's fillers in the described packing cavity; Be provided with the filler spacer between two place's fillers; Described filler lays respectively at the top and the bottom of packing cavity, is provided with packing ring between the filler at said packing cavity top and Gland, and the filler of described packing cavity at and packing cavity bottom are provided with packing ring.
3. the valve of band double sealing structure according to claim 1 and 2 is characterized in that: described filler is provided with the packing seal circle.
4. the valve of band double sealing structure according to claim 2 is characterized in that: be provided with the O RunddichtringO between the outer side wall of said valve rod and the filler spacer, be provided with the O RunddichtringO between the madial wall of described packing cavity and the filler spacer.
5. the valve of band double sealing structure according to claim 1 is characterized in that: described valve body comprises upper valve body and following valve body, and described self-seal device is arranged in the upper valve body, and described bellow seal is arranged at down in the valve body.
6. the valve of band double sealing structure according to claim 1; It is characterized in that: described valve rod is provided with the bellows fixed block away from an end of ripple platform dish; The two ends of described bellows are provided with welding block; Described welding block is provided with ripple platform dish and the welding of bellows fixed block respectively, forms said fixing and is tightly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200025128U CN202402783U (en) | 2012-01-05 | 2012-01-05 | Valve with dual-seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200025128U CN202402783U (en) | 2012-01-05 | 2012-01-05 | Valve with dual-seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202402783U true CN202402783U (en) | 2012-08-29 |
Family
ID=46700431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200025128U Expired - Fee Related CN202402783U (en) | 2012-01-05 | 2012-01-05 | Valve with dual-seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202402783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035878A (en) * | 2017-04-25 | 2017-08-11 | 重庆科特工业阀门有限公司 | The non-maintaining flat gate valve of valve stem packing |
-
2012
- 2012-01-05 CN CN2012200025128U patent/CN202402783U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035878A (en) * | 2017-04-25 | 2017-08-11 | 重庆科特工业阀门有限公司 | The non-maintaining flat gate valve of valve stem packing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20130105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |