CN200961708Y - High differential pressure series power station isolation valve - Google Patents
High differential pressure series power station isolation valve Download PDFInfo
- Publication number
- CN200961708Y CN200961708Y CN 200620125138 CN200620125138U CN200961708Y CN 200961708 Y CN200961708 Y CN 200961708Y CN 200620125138 CN200620125138 CN 200620125138 CN 200620125138 U CN200620125138 U CN 200620125138U CN 200961708 Y CN200961708 Y CN 200961708Y
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- valve
- hole
- power station
- pressure difference
- high pressure
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Abstract
A high differential pressure system power station separating valve, used for a separating valve on conditions of a high temperature, high pressure and high differential pressure in a fossil-fired power plant, comprises a valve body, a valve seat, a valve bar and a bonnet, wherein a uniform flowing mask is equipped between the bonnet and the valve seat, the uniform flowing mast is equipped with a lengthwise hole, the inner diameter of the hole is suited with the lower portion of the valve bar, and the side wall of the uniform flowing mast is equipped with a flow saving hole communicated with the hole. Different from normal two-position closing valve (stop valve), the valve increases the changeable valve seat and the uniform flowing mask, decreases the pressure difference when opening and closing the valve gate by equipping the uniform flowing mask, thereby prolonging the using life of the products and increasing the reliability of the performance of the active system.
Description
Technical field
The utility model belongs to machinery products, relates to a kind of High Pressure Difference separating valve technical field.
Background technique
Have now in subcritical, overcritical and the supercritical thermal power unit, each system of boiler and steam turbine all relates to the discharging and the recovery of carbonated drink, most important as its major control element-separating valve (stop valve, cut-off gate), the common stop valve of the general employing of existing technology, two polyphones use, to strengthen the security insurance coefficient.Because structural design, saturation water and saturated vapour produce rapid throttling when the little aperture of valve, and airspeed and bubble pressure sharply rise, and flash distillation and cavitation very easily take place, and cause washing away and cavitation erosion of valve sealing face and valve interior wall.Even thereby adopt the series connection of two valves to use, a large amount of generations of leaking in also unavoidable have a strong impact on the efficient and the reliability of unit.How to address these problems is the heat subject of current power station equipment manufacturing and valve industry.
The model utility content
The utility model purpose is to design a kind of at High Temperature High Pressure, High Pressure Difference operating mode, the High Pressure Difference series power station separating valve that can use safely.
The utility model valve body, valve rod, valve gap, stem lower portion is set in the through hole of valve gap, and the current-sharing cover is set between valve gap and valve body, and described current-sharing is covered with axial hole, this through hole internal diameter and valve rod lower end are adaptive, the throttle orifice that is communicated with through hole in the sidewall setting of current-sharing cover.
When valve rod rises, the lower end spool is with after valve seat separates, and after medium enters from the water intake of valve body one side, enters current-sharing cover mesopore, and valve seat orifice lower end through the throttle orifice of current-sharing cover successively, discharges from the water outlet of valve body opposite side at last.The utility model can reduce interior sealing system pressure reduction effectively, and the protection sealing surface is avoided because washing away of causing of the cavitation that causes of flash distillation and high velocity air, thereby prolongs product working life, improves the military service reliability of system operation.
The utility model adopts throttle element, solve cavitation erosion, cavitation, wash away, difficult problems such as vibration and noise, be fit to because of upstream and downstream pressure reduction big, the operating mode that easily causes cavitation erosion, cavitation is used, can be made into High Pressure Difference blowdown valve, steam turbine drain valve, to empty exhaust steam valve, accident discharging valve, be widely used in the boiler of big-and-middle-sized thermal power generation unit and the unrestrained water of steam turbine, blowdown, to systems such as empty exhausts.
Throttle orifice described in the utility model is distributed on the sidewall of spool, and is the helical rising evenly.
Above-mentioned throttle orifice can be the isometrical through hole of inside and outside end, can also can be through hole small in ends, broad in the middle for big, the inner little through hole in outer end.
Description of drawings
Fig. 1 is applied in a kind of structural representation of High Pressure Difference blowdown valve for the utility model.
Fig. 2 is applied in a kind of structural representation of steam turbine drain valve for the utility model.
Fig. 3 is applied in a kind of structural representation to empty exhaust steam valve for the utility model.
Fig. 4 is applied in a kind of structural representation of accident discharging valve for the utility model.
Fig. 5 is a kind of structure enlarged view of current-sharing cover.
Fig. 6 is the another kind of structure enlarged view of current-sharing cover
Fig. 7 is the third structure enlarged view of current-sharing cover.
Embodiment
As shown in Figure 1, High Pressure Difference series power station separating valve has comprised valve body 1, valve seat 2, valve rod 4, current-sharing cover 3 and valve gap 6, valve seat 2 is arranged on the interior end of valve body 1, valve rod 4 bottoms are set in the through hole of valve gap 6, fixedly connected with the upper end of valve body 1 with bolt 8 by limiting board 7 in the lower end of valve gap 6, current-sharing cover 3 is limited between valve gap 6 and the valve seat 2.Valve body 1 upper end is provided with wedge-type self-tightening sealing circle 5, by flange screw, realize valve body to external sealed.
As shown in Figure 5, current-sharing cover 3 is provided with the through hole 3-1 that valve rod 4 lower ends are entered, at the uniform some throttle orifice 3-2 that are communicated with through hole 3-1 of the sidewall of current-sharing cover 3.Among Fig. 6, the outer end is isometrical in the throttle orifice 3-2, is suitable for common or the standard use.
Shown in Figure 6, throttle orifice is big, inner little T shape hole, outer end, has the characteristic of low noise.
Shown in Figure 7, throttle orifice is small in ends, broad in the middle, has the characteristic of bearing superhigh pressure difference.
Claims (6)
1, High Pressure Difference series power station separating valve, comprise valve body, valve rod, valve gap, stem lower portion is set in the through hole of valve gap, it is characterized in that between valve gap and valve body, being provided with the current-sharing cover, described current-sharing is covered with axial hole, this through hole internal diameter and valve rod lower end are adaptive, the throttle orifice that is communicated with through hole in the sidewall setting of current-sharing cover.
2, according to the described High Pressure Difference series of claim 1 power station separating valve, it is characterized in that described throttle orifice is distributed on the sidewall of current-sharing cover, and it is evenly arranged evenly in sidewall to be helical,
3, according to the described High Pressure Difference series of claim 1 power station separating valve, it is characterized in that described throttle orifice is the isometrical through hole in interior outer end.
4,, it is characterized in that described throttle orifice is big, the inner little through hole in outer end according to the described High Pressure Difference series of claim 1 power station separating valve.
5, according to the described High Pressure Difference series of claim 1 power station separating valve, it is characterized in that described throttle orifice is a through hole small in ends, broad in the middle.
6, according to the described High Pressure Difference series of claim 1 power station separating valve, it is characterized in that valve seat being set in current-sharing cover bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620125138 CN200961708Y (en) | 2006-11-08 | 2006-11-08 | High differential pressure series power station isolation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620125138 CN200961708Y (en) | 2006-11-08 | 2006-11-08 | High differential pressure series power station isolation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200961708Y true CN200961708Y (en) | 2007-10-17 |
Family
ID=38798225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620125138 Expired - Fee Related CN200961708Y (en) | 2006-11-08 | 2006-11-08 | High differential pressure series power station isolation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200961708Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133707A (en) * | 2011-11-22 | 2013-06-05 | 浙江三花股份有限公司 | Motorized valve and manufacture method of motorized valve |
| CN103206546A (en) * | 2013-04-10 | 2013-07-17 | 南通红星高压阀门有限公司 | Isolating type adjusting valve |
| CN103527787A (en) * | 2013-11-01 | 2014-01-22 | 南通市电站阀门有限公司 | Metal seal ring convenient to dismantle and power station regulating valve with metal seal ring |
| CN103527799A (en) * | 2013-08-05 | 2014-01-22 | 南通市电站阀门有限公司 | High-pressure adjusting valve |
| CN104676013A (en) * | 2015-02-15 | 2015-06-03 | 德科隆（无锡）流体控制有限公司 | Online quickly-repaired power station stop valve and replacement method for valve seat of stop valve |
| CN105134984A (en) * | 2015-10-16 | 2015-12-09 | 吴忠仪表有限责任公司 | Low-flow-rate high-differential-pressure double-helix pressure reduction control valve |
-
2006
- 2006-11-08 CN CN 200620125138 patent/CN200961708Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133707A (en) * | 2011-11-22 | 2013-06-05 | 浙江三花股份有限公司 | Motorized valve and manufacture method of motorized valve |
| CN103133707B (en) * | 2011-11-22 | 2015-03-25 | 浙江三花股份有限公司 | Motorized valve and manufacture method of motorized valve |
| CN103206546A (en) * | 2013-04-10 | 2013-07-17 | 南通红星高压阀门有限公司 | Isolating type adjusting valve |
| CN103527799A (en) * | 2013-08-05 | 2014-01-22 | 南通市电站阀门有限公司 | High-pressure adjusting valve |
| CN103527799B (en) * | 2013-08-05 | 2015-11-25 | 南通市电站阀门有限公司 | A kind of septum valve |
| CN103527787A (en) * | 2013-11-01 | 2014-01-22 | 南通市电站阀门有限公司 | Metal seal ring convenient to dismantle and power station regulating valve with metal seal ring |
| CN103527787B (en) * | 2013-11-01 | 2016-03-23 | 南通市电站阀门有限公司 | A kind of control valve for power station adopting the metal sealing coil structures of convenient disassembly |
| CN104676013A (en) * | 2015-02-15 | 2015-06-03 | 德科隆（无锡）流体控制有限公司 | Online quickly-repaired power station stop valve and replacement method for valve seat of stop valve |
| CN105134984A (en) * | 2015-10-16 | 2015-12-09 | 吴忠仪表有限责任公司 | Low-flow-rate high-differential-pressure double-helix pressure reduction control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20121108 |