CN202484382U - Adjustment valve for water supply system of ultra-supercritical unit - Google Patents
Adjustment valve for water supply system of ultra-supercritical unit Download PDFInfo
- Publication number
- CN202484382U CN202484382U CN2012200797138U CN201220079713U CN202484382U CN 202484382 U CN202484382 U CN 202484382U CN 2012200797138 U CN2012200797138 U CN 2012200797138U CN 201220079713 U CN201220079713 U CN 201220079713U CN 202484382 U CN202484382 U CN 202484382U
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- valve
- spool
- valve core
- valve seat
- core
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- Expired - Fee Related
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- Sliding Valves (AREA)
- Details Of Valves (AREA)
Abstract
The utility model provides an adjustment valve for a water supply system of an ultra-supercritical unit. The adjustment valve comprises a valve cover, a valve body, a valve rod, a valve seat, an outer valve core and a pressing sleeve, wherein the valve seat is fixed in the valve body; the outer valve core is fixedly connected with the valve rod; the outer valve core and the valve seat are sealed by sealing gaskets; a lower bushing formed by laminating labyrinth-shaped disks, a plurality of layers of middle bushings with a plurality of groups of small holes and an upper bushing with a window are sequentially arranged in the valve body close to the valve seat; the pressing sleeve and the upper bushing are sealed by sealing rings; the pressing sleeve and the valve cover are sealed by pads; an inner valve core is arranged in the outer valve core and fixed on the outer valve core through a screw; the inner valve core and the outer valve core are sealed by sealing rings; a spring is arranged between the inner valve core and the outer valve core; and a sealing pair is formed between the inner valve core and the valve seat. The adjustment valve has the beneficial effects that high-differential-pressure fluid can be treated segment by segment and controlled stably; and the adjustment valve has the advantages of cavitation resistance, low noise, high sensitivity, long service life and the like.
Description
Technical field
The utility model relates to a kind of valving, and especially a kind of ultra supercritical fired power generating unit water supply system is used modulating valve.
Background technique
Existing use that mainly to act on modulating valve at thermal power plant's main feed system, feed water pump recirculating system be to ensure in the water pump and can not vaporize during at unit starting, 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 all exist interior leakage, bite, noise big, be prone to vibration, be prone to cavitation, problem such as sensitivity is low, leakage rate is big, working life is short.In order to satisfy the adjusting under the lower pressure reduction of High Pressure Difference small flow and big flow simultaneously, common practices will be handled with 2 modulating valve simultaneously, during boiler startup, and a job under big pressure reduction small flow, inclement condition, damage easily; When proper functioning, the rill metered valve cuts out, and another deck valve is opened, and guarantees to work normally.
Summary of the invention
Carry out the 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 the deficiency that leakage in existing, bite, noise be big, be prone to vibration, be prone to cavitation, sensitivity is low, leakage rate is big, working life is short, the present invention provides a kind of ultra supercritical unit water supply system to use modulating valve.
It is that a kind of ultra supercritical unit water supply system is used modulating valve that the utility model solves the technological scheme that its technical problem adopted; Comprise valve gap, valve body, valve rod, valve seat, outer spool, be connected through bolt between valve body and the valve gap that valve seat is fixed in the valve body; Outer spool is fixedly connected with valve rod; Through seal ring sealing, 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 valve body between outer spool and the valve seat, also have 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 outside on the spool, the two also is equipped with spring through seal ring seal between inner spool and the outer spool to inner spool, forms sealing pair between inner spool and the valve seat through screw.
The beneficial effect of the utility model is to have realized gravity cascade system High Pressure Difference fluid, and control is stable, has 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
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is the tectonic maps of 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 is used modulating valve, comprises valve gap 2, valve body 5, valve rod 1, valve seat 14, outer spool 6; Be connected through bolt between valve body 5 and the valve gap 2; Valve seat 14 is fixed in the valve body 5, and outer spool 6 is fixedly connected with valve rod 1, seals through seal ring 13 between outer spool 6 and the valve seat 14; Near valve seat 14 places the upper bushes 9 that lower sleeve 12, multilayer that the maze type disc is formed by stacking are equipped with the middle sleeve 10 of many group apertures and have window are housed successively in the valve body 5; Also have a gland 4, gland 4 seals through seal ring 7 with upper bush 9, and passes through pad 3 sealings between the valve gap 2.
In the outer spool 6 inner spool 11 is housed also, outside on the spool 6, the two also is equipped with spring 8 through 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 through screw for inner spool 11.
During use; Drive device drives valve rod 1 moves upward; Outer spool 6 makes progress with inner spool 11; Medium at first gets into the lower sleeve 12 that the maze type disc is formed by stacking, and satisfies valve is handled big pressure reduction low discharge under little aperture ability, thoroughly solves the problem of valve anti-cavitation ability under little aperture High Pressure Difference; When outer spool 6 and inner spool 11 move upward to middle sleeve 1O that multilayer punching sleeve combination forms and go up, can satisfy modulating valve is handled medium pressure drop and normal flow rate under medium aperture ability.When outer spool 6 moves upward to the 9 last times of upper bush that individual layer has window with inner spool 11; Can satisfy modulating valve and under big aperture, handle the ability of little pressure drop and big flow; Modulating valve can realize that original 2 modulating valve carry out the regulatory function under High Pressure Difference small flow and the lower pressure reduction of big flow, greatly reduce cost.
Adopt double spool to cooperate the design of bivalve seat, 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. a ultra supercritical unit water supply system is used modulating valve; Comprise valve gap, valve body, valve rod, valve seat, outer spool, be connected through bolt between valve body and the valve gap that valve seat is fixed in the valve body; Outer spool is fixedly connected with valve rod; Through seal ring sealing, it is characterized in that between outer spool and the valve seat: 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 have 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 according to claim 1 is used modulating valve; It is characterized in that: inner spool also is housed in the spool outside described; Inner spool is through screw outside on the spool; The two also is equipped with spring through seal ring seal between inner spool and the outer spool, forms sealing pair between inner spool and the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200797138U CN202484382U (en) | 2012-03-06 | 2012-03-06 | Adjustment valve for water supply system of ultra-supercritical unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200797138U CN202484382U (en) | 2012-03-06 | 2012-03-06 | Adjustment valve for water supply system of ultra-supercritical unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202484382U true CN202484382U (en) | 2012-10-10 |
Family
ID=46958804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200797138U Expired - Fee Related CN202484382U (en) | 2012-03-06 | 2012-03-06 | Adjustment valve for water supply system of ultra-supercritical unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202484382U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964053A (en) * | 2015-05-27 | 2015-10-07 | 扬中市第一蝶阀厂有限公司 | Regulating valve |
-
2012
- 2012-03-06 CN CN2012200797138U patent/CN202484382U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964053A (en) * | 2015-05-27 | 2015-10-07 | 扬中市第一蝶阀厂有限公司 | Regulating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 226232 Industrial Park, Nanyang Town, Jiangsu, Qidong Patentee after: Dongyuan Jiangsu Valve Testing Technology Co., Ltd. Address before: 226232 Nanyang, Jiangsu City, East Town, Patentee before: Jiangsu Dongyuan Nuclear Power Valve Engineering Technology Research Center Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20210306 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |