CN104295795A - High-voltage-resisting double-sealing corrugated pipe stop valve for nuclear power - Google Patents
High-voltage-resisting double-sealing corrugated pipe stop valve for nuclear power Download PDFInfo
- Publication number
- CN104295795A CN104295795A CN201410413640.5A CN201410413640A CN104295795A CN 104295795 A CN104295795 A CN 104295795A CN 201410413640 A CN201410413640 A CN 201410413640A CN 104295795 A CN104295795 A CN 104295795A
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- CN
- China
- Prior art keywords
- valve
- valve body
- padding
- nut
- bellows
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/48—Attaching valve members to screw-spindles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a high-voltage-resisting double-sealing corrugated pipe stop valve for nuclear power. The stop valve comprises a valve body, a valve rod and a valve base. A corrugated pipe sealing component is arranged between a valve element and the valve rod. The valve element is arranged in the valve body in a sealing mode through the corrugated pipe sealing component. A gasket is arranged on the corrugated pipe sealing component in a sleeving mode. The valve base is arranged into the valve body from the top end of the valve rod in a sleeving mode and is screwed on the valve body. A step is arranged in the valve base, and the gasket is fastened on the valve body. A padding groove is formed between the upper end of the valve base and the valve rod. The padding groove is filled with sealing padding. A padding nut is arranged above the padding. A pressing block is arranged at the lower portion of the padding nut and abuts against the padding. Outer threads are arranged on the outer side of the padding nut. A thin nut for adjusting the padding nut is arranged on the outer threads in a screwed mode. The sealing corrugated pipe stop valve is subjected to double sealing of the padding and a corrugated pipe, the valve rod is prevented from being in contact with conveying media through a heat preservation pipe, the valve rod is protected from corrosion, a sealing protecting line formed by the corrugated pipe sealing component and sealing padding prevents corrosive gas, liquid and dust outside the stop valve from permeating into a valve cover, abrasion is avoided, and damage to a corrugated pipe component is avoided.
Description
Technical field
The present invention relates to a kind of stop valve, relate to the high pressure resistant double seal bellows stop valve of a kind of nuclear power specifically, belong to stop valve technical field field.
Background technique
Current bellows stop valve is that bellows component and valve body pass through at body top end face press seal gasket seal substantially; But in nuclear power equipment field, if between bellows component and valve body, fricative metal powder grain can enter body cavity during assembling, row is altered in pipeline bellows stop valve being housed whole and equipment, metal powder grain is electric conductor, can cause equipment failure, when bellows stop valve is contained in long-play on equipment simultaneously, due to the impact of vibration, may occur between bellows component and valve body loosening, occur that the gasket seal between bellows component and valve body lost efficacy, occur dielectric leakage; Only have bellows component one resealing in addition, owing to limiting by current Design and material level, after using certain number of times, may there is breakage or weld gap in bellows self, cause dielectric leakage; The scheme that bellows component and valve body weld together cannot detachable maintaining, and can only change bellows stop valve, cost is higher.
Summary of the invention
Technical problem to be solved by this invention is, overcome the shortcoming of prior art, provide a kind of nuclear power high pressure resistant double seal bellows stop valve, adopt filler, bellows double sealing structure, in the working life of effective raising valve, the actual effect avoided because sealing causes the premature leakage of valve.
In order to solve above technical problem, the invention provides the high pressure resistant double seal bellows stop valve of a kind of nuclear power, comprise valve body, valve rod and valve seat, described valve stem tip is provided with valve body handle by screw, described valve rod lower end connects spool and is arranged on described valve inner, described valve rod is arranged on valve body by described valve seat, sylphon seal assembly is also provided with between described spool and valve rod, by described sylphon seal assembly, described seal spool is arranged in described valve body, on described sylphon seal assembly, cover has pad, described valve seat is inserted in by valve stem tip and is screwed on described valve body, being provided with step in described valve seat inside is fastened on described valve body by described pad, filler groove is also provided with between described valve seat upper end and described valve rod, stuffing box packing is filled with in described filler groove, stuffing nut is provided with above described filler, described stuffing nut bottom is provided with briquetting and pushes against described filler, and the external thread rotary be provided with inside described stuffing nut on internal thread and described valve rod is tightened solid, be provided with outside thread outside described stuffing nut, described outside thread screws the thin nut of adjustment stuffing nut.
The technological scheme that the present invention limits further is: the high pressure resistant double seal bellows stop valve of aforesaid nuclear power, described sylphon seal assembly comprises the bellows be arranged on described valve rod, the lower end of described bellows is welded to connect by spool upper cover and described spool, spool upper cover and the welding manner between described spool and bellows are that built-up welding is welded, the upper end of described bellows is connected with described valve stem seal by upper sealing ring, and valve rod and spool joint are also provided with back-up ring.
The high pressure resistant double seal bellows stop valve of aforesaid nuclear power, the import and export of described valve body is provided with sphere adapter, and described sphere adapter is fixedly linked by cap nut and described valve body, owing to adopting ball conical surface seal, exempt from pad to install, increase the reliability of sealing.
The high pressure resistant double seal bellows stop valve of aforesaid nuclear power, described stuffing box packing is graphite packing, and described bellows is made up of 316L stainless steel.
The high pressure resistant double seal bellows stop valve of aforesaid nuclear power, described valve body handle, in " one " character form structure, is fastenedly connected by socket head screw and described valve rod, easy-to-operat, improves the reliability of valve.
The invention has the beneficial effects as follows: seal bellows stop valve of the present invention, by the double seal of filler and bellows, is not contacted with transmission medium by thermal insulation pipe protection valve rod, protects valve rod and do not weather; The sealing defence line of sylphon seal assembly and stuffing box packing composition, can prevent the gas of stop valve external corrosive, liquid and dust from infiltrating in valve bonnet, avoid wearing and tearing, destroy bellows component, also can prevent the medium of circulation in valve body from being overflowed by valve rod, corrosion valve body structure, guarantees sealability and the working life of stop valve.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is sylphon seal modular construction schematic diagram of the present invention.
Embodiment
embodiment 1
The present embodiment provides a kind of nuclear power high pressure resistant double seal bellows stop valve, structure as shown in Figure 1 to Figure 2, comprise valve body 10, valve rod 11 and valve seat 6, the import and export of valve body 10 is provided with sphere adapter 8, and sphere adapter 8 is fixedly linked by cap nut 9 and valve body; Valve stem tip is provided with the valve body handle 1 of " one " character form structure by screw 2, valve rod 11 lower end connects spool 3-6 and is arranged on valve body 10 inside, by valve seat 6, valve rod is arranged on valve body again, sylphon seal assembly 3 is also provided with between spool and valve rod, by sylphon seal assembly, seal spool is arranged in valve body 10, on sylphon seal assembly, cover has pad, and valve seat 6 is inserted in by valve stem tip and is screwed on valve body 10, is provided with step is fastened on valve body by pad in valve seat inside; Filler groove is also provided with between valve seat upper end and valve rod, graphite grazing filler 7 is filled with in filler groove, above filler, be provided with stuffing nut 4, stuffing nut bottom is provided with briquetting and pushes against filler 7, and the external thread rotary be provided with inside stuffing nut on internal thread and valve rod 11 is tightened solid; Be provided with outside thread outside stuffing nut, outside thread screws the thin nut 5 of adjustment stuffing nut.
The sylphon seal assembly 3 of the present embodiment comprises the 316L corrugated stainless steel tubing 3-3 be arranged on valve rod, the lower end of bellows is welded to connect by spool upper cover 3-4 and spool 3-6, spool upper cover 3-4 and the welding manner between spool and bellows are that built-up welding is welded, the upper end of bellows is connected with valve stem seal by upper sealing ring 3-2, is also provided with back-up ring 3-5 in valve rod 11 and spool 3-6 joint.
The sylphon seal valve of the present embodiment expands the using scope of valve, is specially adapted to the danger medium piping such as inflammable, explosive and poisonous and to the more strict occasion of environmental protection; Be mainly used in the industries such as oil, chemical industry, power station, cut off or connect pipeline, thus system is normally run; Along with the development of nuclear industry, the sylphon seal valve in the process of radiological materials mentioned by the application is first-selected good merchantable brand, has far-reaching social benefit.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technological scheme basis is done, all falls within scope.
Claims (7)
1. the high pressure resistant double seal bellows stop valve of nuclear power, comprise valve body, valve rod and valve seat, described valve stem tip is provided with valve body handle by screw, described valve rod lower end connects spool and is arranged on described valve inner, by described valve seat, described valve rod is arranged on valve body again, it is characterized in that:
Sylphon seal assembly is also provided with between described spool and valve rod, by described sylphon seal assembly, described seal spool is arranged in described valve body, on described sylphon seal assembly, cover has pad, described valve seat is inserted in by valve stem tip and is screwed on described valve body, is provided with step is fastened on described valve body by described pad in described valve seat inside;
Filler groove is also provided with between described valve seat upper end and described valve rod, stuffing box packing is filled with in described filler groove, stuffing nut is provided with above described filler, described stuffing nut bottom is provided with briquetting and pushes against described filler, and the external thread rotary be provided with inside described stuffing nut on internal thread and described valve rod is tightened solid;
Be provided with outside thread outside described stuffing nut, described outside thread screws the thin nut of adjustment stuffing nut.
2. the high pressure resistant double seal bellows stop valve of nuclear power according to claim 1, it is characterized in that: described sylphon seal assembly comprises the bellows be arranged on described valve rod, the lower end of described bellows is welded to connect by spool upper cover and described spool, and the upper end of described bellows is connected with described valve stem seal by upper sealing ring.
3. the high pressure resistant double seal bellows stop valve of nuclear power according to claim 2, is characterized in that: described valve rod and spool joint are also provided with back-up ring.
4. the high pressure resistant double seal bellows stop valve of nuclear power according to claim 2, is characterized in that: described spool upper cover and the welding manner between described spool and bellows are that built-up welding is welded.
5. the high pressure resistant double seal bellows stop valve of nuclear power according to claim 1, is characterized in that: the import and export of described valve body is provided with sphere adapter, and described sphere adapter is fixedly linked by cap nut and described valve body.
6. the high pressure resistant double seal bellows stop valve of nuclear power according to claim 1, is characterized in that: described stuffing box packing is graphite packing, and described bellows is made up of 316L stainless steel.
7. the high pressure resistant double seal bellows stop valve of nuclear power according to claim 1, is characterized in that: described valve body handle, in " one " character form structure, is fastenedly connected by socket head screw and described valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413640.5A CN104295795A (en) | 2014-08-20 | 2014-08-20 | High-voltage-resisting double-sealing corrugated pipe stop valve for nuclear power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413640.5A CN104295795A (en) | 2014-08-20 | 2014-08-20 | High-voltage-resisting double-sealing corrugated pipe stop valve for nuclear power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104295795A true CN104295795A (en) | 2015-01-21 |
Family
ID=52315646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410413640.5A Pending CN104295795A (en) | 2014-08-20 | 2014-08-20 | High-voltage-resisting double-sealing corrugated pipe stop valve for nuclear power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104295795A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321918A (en) * | 2015-06-19 | 2017-01-11 | 和正丰科技股份有限公司 | Self-closing gas filling valve |
| CN110566679A (en) * | 2019-09-24 | 2019-12-13 | 张家港富瑞阀门有限公司 | Stop valve for hydrogen |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344188A (en) * | 2008-09-01 | 2009-01-14 | 陈雨民 | Combined valve cover type break valve |
| CN202971952U (en) * | 2012-11-16 | 2013-06-05 | 镇江市华阳机电制造有限公司 | Needle valve provided with two-piece valve rod |
| CA2862846A1 (en) * | 2012-01-25 | 2013-08-01 | Peter B. Hutton | Bellows valve and double valve body incorporating the same |
| CN203442144U (en) * | 2013-05-17 | 2014-02-19 | 江苏星河阀门有限公司 | External-pressure type bellows stop valve with non-rotating valve rod |
| CN203594838U (en) * | 2013-11-25 | 2014-05-14 | 江苏星河阀门有限公司 | Double-valve set of corrugated pipe instrument |
-
2014
- 2014-08-20 CN CN201410413640.5A patent/CN104295795A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344188A (en) * | 2008-09-01 | 2009-01-14 | 陈雨民 | Combined valve cover type break valve |
| CA2862846A1 (en) * | 2012-01-25 | 2013-08-01 | Peter B. Hutton | Bellows valve and double valve body incorporating the same |
| CN202971952U (en) * | 2012-11-16 | 2013-06-05 | 镇江市华阳机电制造有限公司 | Needle valve provided with two-piece valve rod |
| CN203442144U (en) * | 2013-05-17 | 2014-02-19 | 江苏星河阀门有限公司 | External-pressure type bellows stop valve with non-rotating valve rod |
| CN203594838U (en) * | 2013-11-25 | 2014-05-14 | 江苏星河阀门有限公司 | Double-valve set of corrugated pipe instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321918A (en) * | 2015-06-19 | 2017-01-11 | 和正丰科技股份有限公司 | Self-closing gas filling valve |
| CN106321918B (en) * | 2015-06-19 | 2018-08-07 | 和正丰科技股份有限公司 | Self-closing gas filling valve |
| CN110566679A (en) * | 2019-09-24 | 2019-12-13 | 张家港富瑞阀门有限公司 | Stop valve for hydrogen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150121 |
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| RJ01 | Rejection of invention patent application after publication |