CN100380028C - Nuclear breathing regulating valve for helium test system - Google Patents
Nuclear breathing regulating valve for helium test system Download PDFInfo
- Publication number
- CN100380028C CN100380028C CNB2005100272859A CN200510027285A CN100380028C CN 100380028 C CN100380028 C CN 100380028C CN B2005100272859 A CNB2005100272859 A CN B2005100272859A CN 200510027285 A CN200510027285 A CN 200510027285A CN 100380028 C CN100380028 C CN 100380028C
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- China
- Prior art keywords
- valve
- seal
- spool
- bellow
- test system
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- Expired - Fee Related
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Abstract
The invention consists of a pneumatic diaphragm actuating mechanism and bellow seal control valve. A bellow seal assembly is disposed in the valve cap on the bellow seat of the control valve. Between the valve cover and the valve stem is disposed a double seal formed by the combination of the stuffing seal and between the spool and the guide sleeve is disposed a back seat sealing structure. Because of using the bellow, stuffing and back seat sealing structures, the inventive control valve can make the fluid in the pipeline not flow to the bellow assembly through the gap of the spool and the sleeve and can effectively prevent the medium in the pipeline from leaking outwards.
Description
Technical field
The present invention relates to a kind of pneumatic control valve, especially a kind of air bladder sylphon seal modulating valve.
Background technique
Air bladder sylphon seal modulating valve is made up of pneumatic diaphragn actuating mechanism and sylphon seal modulating valve.It is compared with common modulating valve, its bonnet partly adopts the sylphon seal structure, and be combined to form the double seal form with packing seal, thereby can prevent safely and reliably processing medium from valve lever clearance to external leakage, cause the wasting of resources and cause environmental pollution.Therefore be specially adapted to severe toxicity, valuable, volatile and active medium are regulated, also be applicable to the occasion of pipeline vacuum simultaneously.The pneumatic single seat sylphon seal of 47/48-21000W modulating valve as the production of Shanghai Automatic Industrument and Meter Co Ltd's instrument and meter for automation seven factories.But this modulating valve can cause leakage under the extreme case of sylphon seal and packing seal inefficacy.As using in three grades of equipment of three phase of Qinshan nuclear power Co., Ltd helium test system nuclear safety, the medium in the pipeline is the helium etc. that contains light-water, has radioactivity, in case leak into the external world, can serious environment pollution.Therefore, the nuclear level pneumatic control valve that helium test system is used, use is in the helium test system of three phase of Qinshan nuclear power, the technical requirements and the working condition that must satisfy are: 3 grades of nuclear safety, 2 grades of RCC-M standards, antidetonation 1 class, 2 grades of quality guarantees, bore: 3/4 ", pressure rating: ANSI Class 150, leakage class: ANSI B16 104 Class V, stroke: 20.3mm, specified Cv:1 1.0, serviceability temperature: 93 ℃.
Summary of the invention
The present invention will solve the leakage problem of existing air bladder sylphon seal modulating valve under the situation of sylphon seal and packing seal inefficacy, provide a kind of water clock tight, substantially there is not leakage, have high sealing reliability and Security, can be used for the nuclear level pneumatic control valve in three grades of equipment pipes of helium test system nuclear safety.
As follows for realizing the technological scheme that purpose of the present invention adopts:
A kind of helium test system is with examining the level pneumatic control valve, form by pneumatic diaphragn actuating mechanism and sylphon seal modulating valve, wherein be provided with the sylphon seal assembly in the bonnet on the corrugated header of modulating valve, be provided with packing seal between bonnet and the valve rod and be combined to form double seal, be provided with back of the body seat sealing configuration between spool and the guide pin bushing.
Back of the body seat sealing configuration is to be made of spool and guide pin bushing, and the upper end part of spool is provided with a valve line, and guide pin bushing is provided with a valve line that is meshed with the spool valve line.
The present invention since in the bonnet sealing configuration except adopting sylphon seal and packing seal structure, also use a back of the body seat sealing configuration.Make the fluid in the pipeline not flow to bellows component, can prevent effectively that the interior medium of pipeline is to external leakage by spool and guide pin bushing gap.The leakage class of sealing form can reach the V level (the tight level of water clock does not promptly have leakage substantially) among the CNS GB/T4213, has increased the sealing reliability and the Security of modulating valve greatly.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
Shown in Figure 1, helium test system is with examining the level pneumatic control valve, form by pneumatic diaphragn actuating mechanism and sylphon seal modulating valve, the actuator of this valve adopts ∑ F actuator, this actuator is the diaphragm actuator of a routine and the combination of power amplifying system, it utilizes lever principle, makes ouput force amplify 2.6-5.2 doubly.
The pattern of valve is the air to close single-seat valve.Valve seat 2 is housed in the valve body 1, spool 3 in the valve seat 2 is combined with guide pin bushing 4 in corrugated header 5, spool 3 heads are connected with the anti-rotating shaft 6 of hexagonal, be provided with sylphon seal assembly 7 in the bonnet 9 on the corrugated header 5, be provided with packing seal 8 between bonnet 9 and the valve rod 10 and be combined to form double seal, be provided with back of the body seat sealing configuration 11 between spool 3 and the guide pin bushing 4.
Back of the body seat sealing configuration 11 a: valve line is arranged in spool 3 upper end parts, guide pin bushing 4 is as the valve seat of this valve line, under emergency work condition, by giving pneumatic diaphragn actuating mechanism a specified gas signal pressure, spool 3 is upwards promoted, make the valve line and the engagement of the valve line on the guide pin bushing 4 of spool 3 upper ends and keep certain seal pressure power, stop medium to external leakage, the leakage class of sealing form can reach V level (the tight level of water clock among the GB/T4213, promptly do not have leakage substantially), increased the sealing reliability and the Security of modulating valve greatly.
The action principle of this valve is the same with other modulating valve, accepts the control signal of regulation meter, changes the orifice size of spool and valve seat, thereby reaches the purpose of regulating flow.This valve long service life, be 40 years the working life of pressure part, easily damaged parts can satisfy 18 months working life.Use is in the helium test system of three phase of Qinshan nuclear power, the technical requirements and the working condition that satisfy are: 3 grades of nuclear safety, 2 grades of RCC-M standards, antidetonation 1 class, 2 grades of quality guarantees, bore: 3/4 ", pressure rating: ANSI Class 150, leakage class: ANSI B16 104Class V, stroke: 20.3mm, specified Cv:11.0, serviceability temperature: 93 ℃.
Claims (1)
1. a helium test system is with examining the level pneumatic control valve, form by pneumatic diaphragn actuating mechanism and sylphon seal modulating valve, wherein be provided with sylphon seal assembly (7) in the bonnet (9) on the corrugated header of modulating valve (5), be provided with packing seal (8) between bonnet (9) and the valve rod (10) and be combined into double seal, it is characterized in that, be provided with between spool (3) and the guide pin bushing (4) and carry on the back seat sealing configuration (11), described back of the body seat sealing configuration (11) is by a valve line of the upper end part that is arranged on described spool (3) and is arranged on one on the guide pin bushing (4) valve line formation that is meshed with the spool valve line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100272859A CN100380028C (en) | 2005-06-29 | 2005-06-29 | Nuclear breathing regulating valve for helium test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100272859A CN100380028C (en) | 2005-06-29 | 2005-06-29 | Nuclear breathing regulating valve for helium test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1888486A CN1888486A (en) | 2007-01-03 |
| CN100380028C true CN100380028C (en) | 2008-04-09 |
Family
ID=37577773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100272859A Expired - Fee Related CN100380028C (en) | 2005-06-29 | 2005-06-29 | Nuclear breathing regulating valve for helium test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100380028C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2317375Y (en) * | 1997-10-20 | 1999-05-05 | 吕海常 | Medium-high-pressure bellow stop valve |
| CN2537865Y (en) * | 2002-04-03 | 2003-02-26 | 苏州实得企业发展有限公司 | Pneumatic lining fluorine plastic corrugated pipe seal regulation valve |
| CN2627293Y (en) * | 2003-07-11 | 2004-07-21 | 周庆男 | Fluorine lining plastic corrugated tube total sealed-regulating valve |
| CN2634207Y (en) * | 2003-03-13 | 2004-08-18 | 周庆男 | Pneumatic and electric flurine plastic lined corrugated pipe seal regulating valve |
-
2005
- 2005-06-29 CN CNB2005100272859A patent/CN100380028C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2317375Y (en) * | 1997-10-20 | 1999-05-05 | 吕海常 | Medium-high-pressure bellow stop valve |
| CN2537865Y (en) * | 2002-04-03 | 2003-02-26 | 苏州实得企业发展有限公司 | Pneumatic lining fluorine plastic corrugated pipe seal regulation valve |
| CN2634207Y (en) * | 2003-03-13 | 2004-08-18 | 周庆男 | Pneumatic and electric flurine plastic lined corrugated pipe seal regulating valve |
| CN2627293Y (en) * | 2003-07-11 | 2004-07-21 | 周庆男 | Fluorine lining plastic corrugated tube total sealed-regulating valve |
Non-Patent Citations (1)
| Title |
|---|
| 套筒型调节阀工作特点及选用. 陈世伟.中国仪器仪表，第1998年第2期. 1998 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1888486A (en) | 2007-01-03 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD. Free format text: FORMER OWNER: SHANGHAI AUTOMATIC INDUSTRUMENT AND METER CO LTD Effective date: 20150617 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150617 Address after: Zhabei District Shanghai City, No. 191 West Guangzhong road 200072 No. 7 Patentee after: Shanghai instrument and meter for automation company limited Address before: 200233, No. 41 Rainbow Road, Shanghai, Xuhui District Patentee before: Shanghai Automatic Industrument and Meter Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080409 Termination date: 20180629 |