CN201795053U - High pressure difference water feed regulating valve - Google Patents
High pressure difference water feed regulating valve Download PDFInfo
- Publication number
- CN201795053U CN201795053U CN2010201948916U CN201020194891U CN201795053U CN 201795053 U CN201795053 U CN 201795053U CN 2010201948916 U CN2010201948916 U CN 2010201948916U CN 201020194891 U CN201020194891 U CN 201020194891U CN 201795053 U CN201795053 U CN 201795053U
- Authority
- CN
- China
- Prior art keywords
- valve
- water feed
- valve body
- spool
- high pressure
- 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 - Fee Related
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Abstract
The utility model relates to a valve structure, in particular to a supporting device for 300MW and 600MW unit start-up water feed pumps (electric water feed pumps), which is used for water feed adjustment in boiler start and comprises a valve body with a liquid inlet and a liquid outlet, and a bonnet mounted on the upper portion of the valve body. A liquid regulation mechanism arranged in the valve body comprises a cylindrical valve seat arranged in the liquid inlet and the liquid outlet, a cover is arranged above the valve seat, a plurality of geometric pores are arranged on the lower portion of the cover, a cylindrical valve spool is arranged in the cover, and a valve stem is connected to the top end of the valve spool. The valve can realize multi-stage throttling, prevents flushing, can reduce noise by 10 decibels by aid of the geometric pores reducing transmission of sound source, and accordingly achieves the effect of noise reduction, and further the service life is prolonged by 3 to 4 times than that of a common water feed regulation valve.
Description
Technical field
The utility model relates to a kind of valve mechanism, and the corollary equipment of a kind of specifically 300MW and 600MW startup of unit feed water pump (electrically driven feedpump) is regulated as boiler starting feedwater.It can occur playing under the very big situation of front and back pressure reduction the effect of step-down in constant speed pump starting back, and erosion appears in anti-locking system to be damaged.
Background technique
Feed-regulating valve is mounted on the feed water pump pipeline before, regulates as boiler starting feedwater.The adjustment of big capacity unit confluent all adopts the steam turbine that can adjust rotating speed to drag feed water pump, and feed-regulating valve is not established in the feedwater piping outlet.But steam turbine speed control has its minimum speed limit, and the feedwater flow under its minimum speed can not satisfy the boiler cold-state start request, so be equipped with the constant speed motor water pump.Because when the constant speed feed water pump reached steady state after starting, front and back pressure reduction was very big, outlet pressure is exactly the pressure reduction of feed water pump and boiler inlet, will reach 18-20Mpa, so just very high to the technical requirements of electrically driven feedpump outlet regulating.
The present High Pressure Difference feed-regulating valve that uses, because material therefor and structure is different, product performance are widely different.Subject matter is: under the pressure reduction about 18Mpa, owing to brute force is washed away, and cavitation erosion occurs.In case the appearance cavitation erosion with regard to the appearance leakage, wastes energy and damages operational system, and the very big noise of appearance.
Summary of the invention
The purpose of this utility model is to provide the High Pressure Difference feed-regulating valve of a kind of anti-cavitation erosion, low, the no leakage of noise, energy saving, long service life.
For reaching the technological scheme that above-mentioned purpose adopts is a kind of High Pressure Difference feed-regulating valve, comprise valve body that is provided with the liquid flow inlet and outlet and the valve gap that is installed in valve body top, be provided with liquid stream controlling mechanism in the valve body, liquid stream controlling mechanism comprises the drum type valve seat that is located in the liquid flow inlet and outlet, be located at shrouding of valve seat top, shroud the bottom and be provided with a plurality of how much shape apertures, be provided with the drum type spool in shrouding, the spool top connects valve rod.
The following interruption-forming inclined-plane of above-mentioned spool.
Above-mentioned spool top is provided with y-type seal ring, and the seal ring top is provided with baffle ring.
The import and export of above-mentioned valve body connect for straight-through.
Compared with the prior art the utility model has obvious advantage, can realize multistage throttle, prevents to take place with washing away, utilizes the conduction of how much shape aperture loss sound sources, and 10 decibels decay can be provided, and reaches the reduction anti noise.And improved working life, comparable general feed-regulating valve prolongs 3-4 doubly.
Description of drawings
Fig. 1 is the section of structure of the utility model High Pressure Difference feed-regulating valve.
Embodiment
As shown in Figure 1, the utility model comprises valve body 1 and is installed in the valve gap 2 on valve body 1 top, offers on the valve body 1 and import and export 3.Liquid stream controlling mechanism is installed in the valve body 1, comprises being located at the cylindrical shape valve seat 4 that valve body 1 is imported and exported in 3, and the heavy wall that is located at valve seat 4 tops shrouds 5, shrouds 5 bottoms and is provided with a plurality of how much shape apertures, shrouds being provided with drum type spool 6 in 5.Spool 6 end openings are inclined-plane 7, and the top connects valve rod 10.Y-type seal ring 8 is arranged on the top of spool 6 by baffle ring 9.The import and export 3 of valve body 1 are straight-through type.The utility model adopts the heavy wall that has a plurality of apertures to shroud according to handling characteristics, utilizes spool to move up and down and changes the adjusting that the passage section that shrouds aperture is realized feedwater flow.By the porous throttling High Pressure Difference is reduced to tend to balance, prevent the generation of washing away and the normal operation of system.The working principle of spool is the dc signal that utilizes regulator to send here, amplifies rear driving actuator through servoamplifier, produces end thrust, drives the spool action.
Claims (4)
1. High Pressure Difference feed-regulating valve, comprise valve body that is provided with the liquid flow inlet and outlet and the valve gap that is installed in valve body top, be provided with liquid stream controlling mechanism in the valve body, it is characterized in that: liquid stream controlling mechanism comprises the drum type valve seat (4) that is located in the liquid flow inlet and outlet (3), be located at shroud (5) of valve seat (4) top, shroud (5) bottom and be provided with a plurality of how much shape apertures, shroud being provided with drum type spool (6) in (5), spool (6) top connects valve rod (10).
2. High Pressure Difference feed-regulating valve according to claim 1 is characterized in that the following interruption-forming inclined-plane (7) of spool (6).
3. High Pressure Difference feed-regulating valve according to claim 1 and 2 is characterized in that spool (6) top is provided with y-type seal ring (8), and the seal ring top is provided with baffle ring (9).
4. High Pressure Difference feed-regulating valve according to claim 1 and 2 is characterized in that the import and export (3) of valve body (1) connect for straight-through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201948916U CN201795053U (en) | 2010-05-19 | 2010-05-19 | High pressure difference water feed regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201948916U CN201795053U (en) | 2010-05-19 | 2010-05-19 | High pressure difference water feed regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201795053U true CN201795053U (en) | 2011-04-13 |
Family
ID=43849961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201948916U Expired - Fee Related CN201795053U (en) | 2010-05-19 | 2010-05-19 | High pressure difference water feed regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201795053U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679032A (en) * | 2012-05-31 | 2012-09-19 | 无锡宝牛阀业有限公司 | Pressure balance type porous noise reduction sleeve guide adjusting valve |
| CN105443779A (en) * | 2016-01-14 | 2016-03-30 | 中国船舶重工集团公司第七�三研究所 | Valve quiescent-flow element of marine steam turbine |
-
2010
- 2010-05-19 CN CN2010201948916U patent/CN201795053U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679032A (en) * | 2012-05-31 | 2012-09-19 | 无锡宝牛阀业有限公司 | Pressure balance type porous noise reduction sleeve guide adjusting valve |
| CN105443779A (en) * | 2016-01-14 | 2016-03-30 | 中国船舶重工集团公司第七�三研究所 | Valve quiescent-flow element of marine steam turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Wu Bowen Document name: Notification to Go Through Formalities of Registration |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hunan Wenda Valve Manufacturing Co. Ltd Assignor: Wu Bowen Contract record no.: 2013430000014 Denomination of utility model: High differential pressure feed-regulating valve Granted publication date: 20110413 License type: Exclusive License Record date: 20130328 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20160519 |