CN201373149Y - Main steam safety valve - Google Patents
Main steam safety valve Download PDFInfo
- Publication number
- CN201373149Y CN201373149Y CN200920141967U CN200920141967U CN201373149Y CN 201373149 Y CN201373149 Y CN 201373149Y CN 200920141967 U CN200920141967 U CN 200920141967U CN 200920141967 U CN200920141967 U CN 200920141967U CN 201373149 Y CN201373149 Y CN 201373149Y
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- CN
- China
- Prior art keywords
- valve
- stroke switch
- travel switch
- safety valve
- opened
- 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.)
- Expired - Lifetime
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- 230000005611 electricity Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The utility model discloses a main steam relief valve, including setting up disk seat in the valve body, pressing disk seat on the valve clack, with the valve rod that the valve clack be connected, the valve clack with the setting that the disk seat can be opened and close relatively, this relief valve still include top-down setting at last travel switch and the lower travel switch in the valve body, set up at the valve rod top with the touching part that two travel switches of the aforesaid correspond the setting, touching part set up last travel switch and lower travel switch between, last travel switch and lower travel switch be connected with the control system electricity. Due to the adoption of the technical scheme, the safety valve can detect whether the valve is opened or not, and can observe whether the valve is opened to a preset position or is fully opened or not.
Description
Technical field
The utility model relates to a kind of main steam safety valve, is mainly used in the heat power equipment automation control system, and the pressure that is widely used in nuclear power station main steam system middle steam tube road is regulated.
Background technique
The action principle of existing main steam safety valve is, flap is pressed on the valve seat, and when system pressure rose to the cracking pressure of valve, flap rose, valve opening, system decompression; When system pressure was got back to the safety valve preset pressure, flap was pressed on the valve seat, valve closing.
In order accurately to know the working condition of safety valve, a position limit switch is installed in valve body sometimes, position limit switch is connected with control system, the touching parts are installed on valve rod, after safety valve is opened to a certain degree, touching component triggers position limit switch, control system is sensed signal; When safety valve cut out, touching parts and position limit switch were separated, and control system is sensed a signal again, judges the keying of safety valve thus.Whether this kind mode can only detect valve and open, and whether is opened to special position but can not detect valve rod.
The model utility content
Technical problem to be solved in the utility model is to realize can both detecting the whether unlatching and the opening degree of main steam safety valve.
The technological scheme that the utility model adopted is: a kind of main steam safety valve, comprise the valve seat that is arranged in the valve body, be pressed in the flap on the described valve seat, the valve rod that is connected with described flap, the setting that described flap and described valve seat can open and close relatively, this safety valve also comprises upper stroke switch and the lower stroke switch that is arranged in the valve body from top to bottom, be arranged on the valve rod top and touching parts above-mentioned two corresponding settings of position limit switch, described touching parts are arranged between described upper stroke switch and the lower stroke switch, and described upper stroke switch is electrically connected with control system with lower stroke switch.
The position of lower stroke switch is that when flap was closed, the touching parts triggered lower stroke switch just; The position of upper stroke switch is that when flap was opened fully, the touching parts triggered upper stroke switch just.
Described touching parts are the disk that is fixed on the valve rod top, and disk has stressed advantage of uniform, and connect more stable.Upper stroke switch and lower stroke switch are provided with in opposite directions, arrange more convenient.
Because whether the employing of technique scheme makes this safety valve not only can detect valve and open, can also observe valve and whether be opened to the precalculated position or open entirely.
Description of drawings
Fig. 1 is a main sectional view of the present utility model;
Wherein, 1, valve seat, 2, flap, 3, valve rod, 4, upper stroke switch, 5, lower stroke switch, 6, disk.
Embodiment
Below embodiment of the present utility model is described:
Referring to main steam safety valve shown in Figure 1, it comprises the valve seat 1 that is arranged in the valve body, is pressed in the flap 2 on the described valve seat 1, the valve rod 3 that is connected with described flap 2, the setting that described flap 2 and described valve seat 1 can open and close relatively, valve rod 3 can lifting in valve body setting.This safety valve also comprises the upper stroke switch 4 and the lower stroke switch 5 that are arranged in the valve body from top to bottom, be arranged on valve rod 3 tops and disks 6 above-mentioned two corresponding settings of position limit switch, and described upper stroke switch 4 and lower stroke switch 5 are arranged in opposite directions.Described disk 6 is arranged between described upper stroke switch 4 and the lower stroke switch 5, and disk 6 triggers lower stroke switch 5 just when this safety valve is in closed condition; Disk 6 triggers upper stroke switch 4 just when safety valve is in the complete opening state, and described upper stroke switch 4 is electrically connected with control system with lower stroke switch 5.
Accordingly, the mechanism of this safety valve is: when system pressure rises to the cracking pressure of safety valve, and valve opening, flap 2 rises, and drives valve rod 3 and rises, and the disk 6 that is fixed on the valve rod 3 also rises, thereby make original normally closed lower stroke switch 5 open, the indication valve open.When valve opening arrives maximum Lift, upper stroke switch 4 closures that disk 6 just in time will often be opened this moment, indication valve this moment is all opened.When pressure is reduced to closing pressure, valve closing, disk 6 is along with valve rod 3 and flap 2 descend, upper stroke switch 4 is opened again, indication valve this moment is standard-sized sheet (perhaps closing) not, when flap 2 was got back to the origin-location, lower stroke switch 5 was closed again under the effect of disk 6, indication valve closing this moment.Then the working procedure of safety valve can be monitored comparatively accurately.
The above embodiment in order to embody the model utility design of the utility model, is not the qualification that is used for the model utility mode of execution only, and therefore every mode of execution that meets the utility model design all belongs to protection domain of the present utility model.
Claims (2)
1, a kind of main steam safety valve, comprise the valve seat (1) that is arranged in the valve body, be pressed in the flap (2) on the described valve seat (1), the valve rod (3) that is connected with described flap (2), the setting that described flap (2) and described valve seat (1) can open and close relatively, it is characterized in that: this safety valve also comprises upper stroke switch (4) and the lower stroke switch (5) that is arranged in the valve body from top to bottom, be arranged on valve rod (3) top and touching parts above-mentioned two corresponding settings of position limit switch, described touching parts are arranged between described upper stroke switch (4) and the lower stroke switch (5), and described upper stroke switch (4) is electrically connected with control system with lower stroke switch (5).
2, main steam safety valve according to claim 1 is characterized in that: described touching parts are for being fixed on the disk (6) at valve rod (3) top, and described upper stroke switch (4) and lower stroke switch (5) are provided with in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920141967U CN201373149Y (en) | 2009-03-06 | 2009-03-06 | Main steam safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920141967U CN201373149Y (en) | 2009-03-06 | 2009-03-06 | Main steam safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201373149Y true CN201373149Y (en) | 2009-12-30 |
Family
ID=41499230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920141967U Expired - Lifetime CN201373149Y (en) | 2009-03-06 | 2009-03-06 | Main steam safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201373149Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806371A (en) * | 2010-04-02 | 2010-08-18 | 吴江市东吴机械有限责任公司 | Main steam safety valve |
| CN103195957A (en) * | 2013-04-22 | 2013-07-10 | 大连理工安全装备有限公司 | Spring safety valve with online monitoring and inspection functions |
| CN104633197A (en) * | 2015-02-28 | 2015-05-20 | 吴江市东吴机械有限责任公司 | Main steam safety valve |
| CN105090581A (en) * | 2015-08-19 | 2015-11-25 | 湖北三江航天红峰控制有限公司 | Safety valve for high-temperature and high-pressure gas delivery pipeline |
| CN105889585A (en) * | 2016-06-08 | 2016-08-24 | 哈电集团哈尔滨电站阀门有限公司 | Novel full-bore type safety valve |
| CN107143678A (en) * | 2017-05-15 | 2017-09-08 | 永嘉县信诚科技服务有限公司 | High-temperature safety valve |
-
2009
- 2009-03-06 CN CN200920141967U patent/CN201373149Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806371A (en) * | 2010-04-02 | 2010-08-18 | 吴江市东吴机械有限责任公司 | Main steam safety valve |
| CN103195957A (en) * | 2013-04-22 | 2013-07-10 | 大连理工安全装备有限公司 | Spring safety valve with online monitoring and inspection functions |
| CN103195957B (en) * | 2013-04-22 | 2014-09-10 | 大连理工安全装备有限公司 | Spring safety valve with online monitoring and inspection functions |
| CN104633197A (en) * | 2015-02-28 | 2015-05-20 | 吴江市东吴机械有限责任公司 | Main steam safety valve |
| CN105090581A (en) * | 2015-08-19 | 2015-11-25 | 湖北三江航天红峰控制有限公司 | Safety valve for high-temperature and high-pressure gas delivery pipeline |
| CN105889585A (en) * | 2016-06-08 | 2016-08-24 | 哈电集团哈尔滨电站阀门有限公司 | Novel full-bore type safety valve |
| CN107143678A (en) * | 2017-05-15 | 2017-09-08 | 永嘉县信诚科技服务有限公司 | High-temperature safety valve |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091230 |