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 PDF

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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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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
Application number
CN201520281389.1U
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Chinese (zh)
Inventor
张清双
牛小龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Shentong Valve Co Ltd
Original Assignee
Jiangsu Shentong Valve Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangsu Shentong Valve Co Ltd filed Critical Jiangsu Shentong Valve Co Ltd
Priority to CN201520281389.1U priority Critical patent/CN204592377U/en
Application granted granted Critical
Publication of CN204592377U publication Critical patent/CN204592377U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Face the double sealing structure of hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole
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.
CN201520281389.1U 2015-05-05 2015-05-05 Face the double sealing structure of hydrogen harsh operating mode ball valve assembling valve rod auxiliary hole Active CN204592377U (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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