CN103307324A - Adjusting valve for water supply system of ultra-supercritical unit - Google Patents
Adjusting valve for water supply system of ultra-supercritical unit Download PDFInfo
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- CN103307324A CN103307324A CN 201210056025 CN201210056025A CN103307324A CN 103307324 A CN103307324 A CN 103307324A CN 201210056025 CN201210056025 CN 201210056025 CN 201210056025 A CN201210056025 A CN 201210056025A CN 103307324 A CN103307324 A CN 103307324A
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Abstract
The invention provides an adjusting valve for a water supply system of an ultra-supercritical unit. The adjusting valve comprises a valve cover, a valve body, a valve rod, a valve seat and an external valve element, wherein the valve seat is fixedly arranged in the valve body; the external valve element is fixedly connected with the valve rod; the external valve element and the valve seat are sealed through a sealing ring; a lower sleeve formed by laminating labyrinth discs, a plurality of middle sleeves with a plurality of groups of small holes and an upper sleeve with a window are sequentially arranged on a part close to the valve seat in the valve body; a pressing sleeve is also arranged in the valve body; the pressing sleeve and the upper sleeve are sealed by a sealing ring; the pressing sleeve and the valve cover are sealed by a gasket; an internal valve element is also arranged in the external valve element, and is fixedly arranged on the external valve element through a screw; the internal and external valve elements are sealed by a sealing ring; a spring is also arranged between the internal and external valve elements; and a sealing pair is formed between the internal valve element and the valve seat. The adjusting valve has the beneficial effects that high-pressure difference fluid is treated in stages, control stability is ensured, and the adjusting valve has the advantages of cavitation resistance, low noise, high sensitivity, long service life and the like.
Description
Technical field
The present invention relates to a kind of valving, especially a kind of ultra supercritical fired power generating unit water supply system modulating valve.
Background technique
The existing use in thermal power plant's main feed system, feed water pump recirculating system is can not vaporize in the assurance feed water pump during at unit starting with the modulating valve Main Function, and feed water pump is shielded.Because operating conditions is very abominable when low discharge, frequently participates in Flow-rate adjustment, now general domestic such used modulating valve exists all that interior leakage, bite, noise are large, easily vibration, easily cavitation, the problem such as sensitivity is low, leakage rate is large, working life is short.In order to satisfy simultaneously the adjusting under the lower pressure reduction of High Pressure Difference small flow and large flow, common practices will be processed with 2 modulating valve simultaneously, during boiler startup, works under large pressure reduction small flow for one, and inclement condition easily damages; When normal operation, the small flow valve cuts out, and another deck valve is opened, and guarantees to work normally.
Summary of the invention
Carry out adjusting under High Pressure Difference small flow and flow is lower greatly the pressure reduction with 2 modulating valve simultaneously in order to overcome existing thermal power plant main feed system, feed water pump recirculating system, and leakage in existing, bite, noise are large, easily vibration, easily cavitation, sensitivity is low, leakage rate is large, working life is short deficiency, the invention provides a kind of ultra supercritical unit water supply system modulating valve.
The technical solution adopted for the present invention to solve the technical problems is a kind of ultra supercritical unit water supply system modulating valve, comprise valve gap, valve body, valve rod, valve seat, outer spool, be bolted between valve body and the valve gap, valve seat is fixed in the valve body, outer spool is fixedly connected with valve rod, seal by seal ring between outer spool and the valve seat, near the valve seat place lower sleeve that the maze type disc is formed by stacking is housed successively in the valve body, multilayer is equipped with the middle sleeve of many group apertures and has the upper bush of window, also has a gland, gland and upper bush pass through seal ring seal, and pass through gasket seal between the valve gap.
Inner spool also is housed in the outer spool, and inner spool is fixed by screws on the outer spool, and the two also is equipped with spring by seal ring seal between inner spool and the outer spool, forms sealing pair between inner spool and the valve seat.
The invention has the beneficial effects as follows and realized gravity cascade system High Pressure Difference fluid, control is stable, has the advantages such as anti-cavitation, low noise, sensitivity height, the double spool design, and the assurance valve is realized zero leakage for a long time under High Pressure Difference.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the tectonic maps of the present embodiment;
Among the figure: 1. valve rod; 2. valve gap; 3. pad; 4. gland; 5. valve body; 6. outer spool; 7. seal ring; 8. spring; 9. upper bush; 10. middle sleeve; 11. inner spool; 12. lower sleeve; 13. seal ring; 14. valve seat.
Embodiment
As shown in Figure 1, a kind of ultra supercritical unit water supply system modulating valve, comprise valve gap 2, valve body 5, valve rod 1, valve seat 14, outer spool 6, be bolted between valve body 5 and the valve gap 2, valve seat 14 is fixed in the valve body 5, outer spool 6 is fixedly connected with valve rod 1, seal by seal ring 13 between outer spool 6 and the valve seat 14, valve body 5 is interior near the lower sleeve 12 that the maze type disc is formed by stacking being housed valve seat 14 places successively, multilayer is equipped with the middle sleeve 10 of many group apertures and has the upper bush 9 of window, also has a gland 4, gland 4 seals by seal ring 7 with upper bush 9, and seals by pad 3 between the valve gap 2.
In the outer spool 6 inner spool 11 is housed also, inner spool 11 is fixed by screws on the outer spool 6, and the two also is equipped with spring 8 by seal ring 7 sealings between inner spool 11 and the outer spool 6, guarantees the reliable sealing between inner spool 11 and the valve seat 14.
During use, drive unit band ovable valve stem 1 moves upward, outer spool 6 makes progress with inner spool 11, medium at first enters the lower sleeve 12 that the maze type disc is formed by stacking, satisfy valve and under little aperture, process the ability of large pressure reduction low discharge, thoroughly solve the problem of valve anti-cavitation ability under little aperture High Pressure Difference; When outer spool 6 and inner spool 11 move upward on the middle sleeve 10 that multilayer punching sleeve combines, can satisfy modulating valve is processed medium pressure drop and normal flow rate under medium aperture ability.When outer spool 6 and inner spool 11 move upward on the upper bush 9 that individual layer has window, can satisfy modulating valve and under large aperture, process the ability of little pressure drop and large flow, modulating valve can realize that original 2 modulating valve carry out the regulatory function under the lower pressure reduction of High Pressure Difference small flow and large flow, greatly reduce cost.
Adopt double spool to cooperate the double-valve-seat design, inner spool 11 complexed metal valve seats 14 block fluid can effectively protect seal ring 13, and the realization modulating valve is worked under High Pressure Difference for a long time and reached zero leakage, long service life.
Claims (2)
1. ultra supercritical unit water supply system modulating valve, comprise valve gap, valve body, valve rod, valve seat, outer spool, be bolted between valve body and the valve gap, valve seat is fixed in the valve body, outer spool is fixedly connected with valve rod, seal by seal ring between outer spool and the valve seat, it is characterized in that: near the valve seat place upper bushes that lower sleeve, multilayer that the maze type disc is formed by stacking are equipped with the middle sleeve of many group apertures and have window are housed successively in the described valve body, also has a gland, gland and upper bush pass through seal ring seal, and pass through gasket seal between the valve gap.
2. ultra supercritical unit water supply system modulating valve according to claim 1, it is characterized in that: in described outer spool, inner spool is housed also, inner spool is fixed by screws on the outer spool, the two passes through seal ring seal, between inner spool and the outer spool spring is housed also, forms sealing pair between inner spool and the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210056025 CN103307324A (en) | 2012-03-06 | 2012-03-06 | Adjusting valve for water supply system of ultra-supercritical unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210056025 CN103307324A (en) | 2012-03-06 | 2012-03-06 | Adjusting valve for water supply system of ultra-supercritical unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103307324A true CN103307324A (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210056025 Pending CN103307324A (en) | 2012-03-06 | 2012-03-06 | Adjusting valve for water supply system of ultra-supercritical unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103307324A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807455A (en) * | 2014-02-19 | 2014-05-21 | 哈电集团哈尔滨电站阀门有限公司 | Combined throttling pair-type regulating valve |
| CN103867735A (en) * | 2014-03-28 | 2014-06-18 | 株洲南方阀门股份有限公司 | Main water supply bypass regulating valve |
| CN103939629A (en) * | 2014-02-18 | 2014-07-23 | 章华 | Double-seal linkage pilot valve element structure of high-pressure-difference valve |
| CN104314517A (en) * | 2014-11-25 | 2015-01-28 | 四川长仪油气集输设备股份有限公司 | Constant-flow steam injection valve used for heavy oil well |
| CN107314118A (en) * | 2017-07-06 | 2017-11-03 | 江苏华电仪征热电有限公司 | A kind of novel condensation water recycles regulating valve |
| CN107355549A (en) * | 2017-09-17 | 2017-11-17 | 浙江贝尔控制阀门有限公司 | A kind of labyrinth type micro-flow regulating valve |
| CN113217645A (en) * | 2021-04-28 | 2021-08-06 | 纽托克流体控制有限公司 | Anti-surge valve and anti-surge regulating valve control system |
-
2012
- 2012-03-06 CN CN 201210056025 patent/CN103307324A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939629A (en) * | 2014-02-18 | 2014-07-23 | 章华 | Double-seal linkage pilot valve element structure of high-pressure-difference valve |
| CN103807455A (en) * | 2014-02-19 | 2014-05-21 | 哈电集团哈尔滨电站阀门有限公司 | Combined throttling pair-type regulating valve |
| CN103867735A (en) * | 2014-03-28 | 2014-06-18 | 株洲南方阀门股份有限公司 | Main water supply bypass regulating valve |
| CN103867735B (en) * | 2014-03-28 | 2017-02-15 | 株洲南方阀门股份有限公司 | Main water supply bypass regulating valve |
| CN104314517A (en) * | 2014-11-25 | 2015-01-28 | 四川长仪油气集输设备股份有限公司 | Constant-flow steam injection valve used for heavy oil well |
| CN107314118A (en) * | 2017-07-06 | 2017-11-03 | 江苏华电仪征热电有限公司 | A kind of novel condensation water recycles regulating valve |
| CN107314118B (en) * | 2017-07-06 | 2024-04-09 | 江苏华电仪征热电有限公司 | Novel condensate water recirculation regulating valve |
| CN107355549A (en) * | 2017-09-17 | 2017-11-17 | 浙江贝尔控制阀门有限公司 | A kind of labyrinth type micro-flow regulating valve |
| CN113217645A (en) * | 2021-04-28 | 2021-08-06 | 纽托克流体控制有限公司 | Anti-surge valve and anti-surge regulating valve control system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130918 |