CN204592377U - Face the double sealing structure of hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole - Google Patents
Face the double sealing structure of hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole Download PDFInfo
- Publication number
- CN204592377U CN204592377U CN201520281389.1U CN201520281389U CN204592377U CN 204592377 U CN204592377 U CN 204592377U CN 201520281389 U CN201520281389 U CN 201520281389U CN 204592377 U CN204592377 U CN 204592377U
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- valve
- sealing
- seal
- valve body
- disc
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- Expired - Lifetime
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Abstract
本实用新型公开了一种临氢苛刻工况用球阀装配阀杆工艺孔的双重密封结构，在阀体下部设有一个装配阀杆的工艺孔，并在其所处阀体上堆焊有硬质合金，形成锥面密封副；阀瓣密封面上堆焊有硬质合金，并呈球面状，和阀体上堆焊硬质合金的锥面密封副形成线密封,在介质的压力及阀瓣头部的紧固螺母作用力下，形成第一道线接触密封；阀瓣的轴部和阀体下填料函里的填料形成第二道密封，在阀瓣头部的紧固螺母作用力与下填料压盖作用下，保证了填料的密封性能。本实用新型结构合理，使得阀门在保证自身密封性能的基础上，极大的避免了阀门因为频繁启闭导致的潜在泄漏与阀杆飞出的风险，确保阀门能够安全可靠运行，从而提高了阀门的可靠性及安全性。
The utility model discloses a double-sealing structure for assembling a valve stem process hole of a ball valve used in harsh hydrogen working conditions. A process hole for assembling the valve stem is arranged at the lower part of the valve body, and a hard surface is welded on the valve body where it is located. Carbide is surfacing on the sealing surface of the valve disc, and it is spherical, and forms a line seal with the conical sealing pair of hard alloy surfacing on the valve body. The pressure of the medium and the valve Under the force of the tightening nut on the disc head, the first line contact seal is formed; the shaft of the valve disc and the stuffing in the stuffing box under the valve body form the second seal, and the force of the tightening nut on the disc head Under the action of the lower packing gland, the sealing performance of the packing is guaranteed. The utility model has a reasonable structure, so that on the basis of ensuring the valve's own sealing performance, it greatly avoids the potential leakage of the valve caused by frequent opening and closing and the risk of the valve stem flying out, and ensures that the valve can operate safely and reliably, thereby improving the performance of the valve. reliability and safety.
Description
Technical field
The utility model relates to the double sealing structure of a kind of ball valve assembling valve rod auxiliary hole.
Background technique
The harsh operating mode of currently available technology faces hydrogen ball valve, the auxiliary hole of dress valve rod all adopts the sealing means of end cap compress gasket, because hydrogen molecule diameter is little, penetrating power is strong, the volume concentration reaching 4 ~ 75% in atmosphere can be blasted, therefore operating mode needs that periodical repair is carried out to valve and change pad, increase cost of production and reduce output.
Summary of the invention
The purpose of this utility model is to provide a kind of rational in infrastructure, the double sealing structure facing hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole of good seal performance.
Technical solution of the present utility model is:
Face a double sealing structure for hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole, it is characterized in that: the auxiliary hole being provided with an assembling valve rod in valve body lower portion, and on valve body residing for it, heap is welded with cemented carbide, forms conical surface seal secondary; On valve clack sealing surface, heap is welded with cemented carbide, and spherically shape, and on valve body, the conical surface seal pair of pile-up welding hard alloy forms linear sealing, under the pressure of medium and the tightening nut active force of flap head, forms first line contact sealing; Filler under the axle portion of flap and valve body in stuffing box forms second sealing, under the tightening nut active force and lower Gland effect of flap head, ensure that the sealability of filler.
Tightening nut is arranged on the below of bottom flange.Between tightening nut and bottom flange, pad is set.
The utility model is rational in infrastructure, make valve on the basis ensureing self seal performance, avoid valve greatly because frequently open and close the risk that the potential leakage that causes and valve rod fly out, guarantee that valve can safe and reliable operation, thus improve the reliability and safety of valve.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is that one faces hydrogen harsh operating mode ball valve assembly figure.
Fig. 2 is double sealing structure schematic diagram.
Fig. 3 is that valve clack sealing surface and valve body conical surface seal pair form linear sealing structural representation.
Embodiment
Face a double sealing structure for hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole, be provided with the auxiliary hole 1 of an assembling valve rod in valve body lower portion, and on valve body 2 residing for it, heap is welded with cemented carbide 3, forms conical surface seal secondary; On valve clack sealing surface, heap is welded with cemented carbide 4, and spherically shape, and on valve body, the conical surface seal pair of pile-up welding hard alloy forms linear sealing, under the pressure of medium and tightening nut 6 active force of flap 5 head, forms first line contact sealing; Filler 7 under the axle portion of flap and valve body in stuffing box forms second sealing, under tightening nut 6 active force of flap head and lower Gland 8 act on, ensure that the sealability of filler.So both reach the effect preventing valve rod from flying out, in turn ensure that the effective sealing of valve entirety.Bottom flange 9 is also had in figure.Tightening nut is arranged on the below of bottom flange.Between tightening nut and bottom flange, pad is set.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520281389.1U CN204592377U (en) | 2015-05-05 | 2015-05-05 | Face the double sealing structure of hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520281389.1U CN204592377U (en) | 2015-05-05 | 2015-05-05 | Face the double sealing structure of hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204592377U true CN204592377U (en) | 2015-08-26 |
Family
ID=53928529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520281389.1U Expired - Lifetime CN204592377U (en) | 2015-05-05 | 2015-05-05 | Face the double sealing structure of hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204592377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791513A (en) * | 2015-05-05 | 2015-07-22 | 江苏神通阀门股份有限公司 | Double sealing structure for assembling valve rod auxiliary hole through ball valve under resisting hydrogen severe working condition |
-
2015
- 2015-05-05 CN CN201520281389.1U patent/CN204592377U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791513A (en) * | 2015-05-05 | 2015-07-22 | 江苏神通阀门股份有限公司 | Double sealing structure for assembling valve rod auxiliary hole through ball valve under resisting hydrogen severe working condition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150826 |
|
| CX01 | Expiry of patent term |