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
- Authority
- CN
- China
- Prior art keywords
- valve
- auxiliary hole
- sealing
- valve body
- valve rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lift Valve (AREA)
Abstract
The utility model discloses a kind of double sealing structure facing hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole, be provided with the auxiliary hole of 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.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.
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)
1. 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, and the sealability of guarantee filler.
2. the double sealing structure facing hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole according to claim 1, is characterized in that: tightening nut is arranged on the below of bottom flange.
3. the double sealing structure facing hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole according to claim 2, is characterized in that: arrange pad between tightening nut and bottom flange.
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 Active 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 active Active
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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203286121U (en) | Self-sealing gate valve | |
| CN204592377U (en) | Face the double sealing structure of hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole | |
| CN204647375U (en) | Nuclear power island heart high pressure adds the hard self-sealing gate valve of pipe arrangement pressure-relief type | |
| CN104791513A (en) | Double sealing structure for assembling valve rod auxiliary hole through ball valve under resisting hydrogen severe working condition | |
| CN205244407U (en) | Ultra -low temperature hand stop valve | |
| CN203627884U (en) | High-temperature and high-pressure ball valve | |
| CN203115279U (en) | Graphite gland packing box | |
| CN204004754U (en) | Low leakage sealed fixing ball valve | |
| CN202203462U (en) | Conical ultrahigh-pressure self-sealing system | |
| CN202252179U (en) | Stop check valve for high-pressure bellows | |
| CN201934780U (en) | Modified filler pressing sleeve device | |
| CN202280933U (en) | Triple sealing corrugated pipe stop valve | |
| CN203131060U (en) | High-pressure corrugated pipe ball core cut-off valve | |
| CN103671935A (en) | Special valve for multiple sealing structure chlorine conveying pipeline | |
| CN204004491U (en) | A kind of back seal dark rod flat plate gate valve of online replacing filler | |
| CN102878331A (en) | Self seal guiding type stop check valve | |
| CN201354869Y (en) | rubber-lining check valve on sealing surface | |
| CN203272830U (en) | Dual-purpose throttle stop valve | |
| CN205207253U (en) | Two casing centrifugal pump seal structure | |
| CN206816818U (en) | A kind of combined type V-type self-tightening seal ring | |
| CN204493872U (en) | The chlorine bellows stop valve of multiple protective | |
| CN204553864U (en) | integral cut-off valve | |
| CN204062141U (en) | A kind of H type valve seat shape metallic leak-proof structure | |
| CN203892587U (en) | High-performance butterfly valve capable of bearing pressure in forward and reverse directions | |
| CN203560489U (en) | Double eccentric rigidity seal ball valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |