CN203796998U - Desuperheater water adjusting valve - Google Patents
Desuperheater water adjusting valve Download PDFInfo
- Publication number
- CN203796998U CN203796998U CN201420135935.6U CN201420135935U CN203796998U CN 203796998 U CN203796998 U CN 203796998U CN 201420135935 U CN201420135935 U CN 201420135935U CN 203796998 U CN203796998 U CN 203796998U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- spool
- valve element
- nitride layer
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 150000004767 nitrides Chemical class 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 abstract description 13
- 239000012535 impurity Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005121 nitriding Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 238000006902 nitrogenation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Landscapes
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The utility model discloses a desuperheater water adjusting valve which comprises a valve body, a bonnet fixedly connected with the valve body and a drive mechanism disposed at the top of the bonnet. A water inlet and a water outlet are respectively formed in two sides of the valve body. A valve element, a valve rod and a valve seat are disposed in the valve body. The valve rod extends out of the valve body and penetrates the bonnet to be connected with the drive mechanism. A protecting circular piece is disposed at the bottom of the valve seat. A throttling ring and a flow equalizing cover sleeve the valve element. A nitride layer coats the surface of the valve element. The desuperheater water adjusting valve has the advantages that the impurities of desuperheater water are effectively filtered by the protecting circular piece at the bottom of the valve seat and prevented from entering the flow equalizing cover and the throttling ring, the screen holes in the protecting circular piece can not only filter the impurities but balance water pressure, and cavitation of the valve element is reduced; the hardness and erosion resistance of the valve element are increased by the nitride layer, the service life of the valve element is prolonged by 2-3 times, and the mature nitriding is low in cost.
Description
Technical field
The utility model relates to regulating valve, relates in particular to the Desuperheating water regulating valve in a kind of station boiler steam turbine Attemperation water system.
Background technique
In the time of boiler or steam turbine operation fluctuation, or need to the water and steam temperature of higher temperature be reduced to need temperature value time, it issues its temperature signal according to sensor signal or adjusted medium, automatically open or close Desuperheating water regulating valve and regulate spray water flux, make to be adjusted medium temperature parameter to be controlled within the scope of security of system, or within being controlled at system service condition parameter area.Desuperheating water regulating valve working condition is very severe, and it is to move under High Pressure Difference state, often because cavitation erosion makes adjusting function variation, even there is defunctionalization, lose regulating action, occur a large amount of leakages, make systematic parameter cannot ensure normal operation, lose in a large number the energy.And existing Desuperheating water regulating valve is due to the difference of its project organization and material therefor, its performance difference is larger, especially under the operating mode of large unit, problems such as will soon occurring that cavitation erosion, noise are large, easily leak, working life is short, flow curve is mild, quality is bad automatically.
Model utility content
Technical problem to be solved in the utility model: provide a kind of anti-cavitation erosion, good seal performance, long service life, the mild Desuperheating water regulating valve of flow for the deficiencies in the prior art.
The technical problem that the utility model solves can realize by the following technical solutions:
A kind of Desuperheating water regulating valve, the valve gap that comprises valve body, be fixedly connected with described valve body and the driving mechanism that is arranged on described valve gap top, described valve body both sides are provided with intake-outlet, in described valve body, be provided with a spool, a valve rod being fixedly connected with described spool and a valve seat coordinating with described spool top seal, this valve rod stretches out described valve body and is connected with described driving mechanism through described valve gap, described valve seat bottom is provided with a protection disk, described valve core upper sleeve is provided with restrictor ring and current-sharing cover, and the surface deposited metal of described spool has a nitride layer.
In a preferred embodiment of the present utility model, on described protection disk, be evenly installed with some sieve apertures.
In a preferred embodiment of the present utility model, the top of described spool is provided with a groove concaving.
In a preferred embodiment of the present utility model, the thickness of described nitride layer is 5～15 μ m.
Owing to having adopted technological scheme as above, the beneficial effects of the utility model are: the protection disk of valve seat bottom filters the impurity of cooling water effectively, avoid impurity to enter in current-sharing cover and restrictor ring, and sieve aperture on protection disk is except the function of impurity screening, also there is the effect of balancing water pressure, reduce the cavitation erosion to spool; Nitride layer makes the hardness of spool and erosive wear resistance be largely increased (hardness reaches HRC65-70), original serious erosion phenomenon is eliminated substantially, also extended 2～3 times working life, and nitrogenation treatment technology is maturation process, thereby cost is lower; The groove at spool top possesses in advance to be opened and the characteristic of closing that lags behind, and effectively reduces the injury of cavitation erosion.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1, a kind of Desuperheating water regulating valve providing in figure, comprise valve body 100, valve gap 200 and driving mechanism 300, the both sides of valve body 100 are respectively arranged with entery and delivery port 110,120, valve gap 200 is bolted to connection at the top of valve gap 100, and driving mechanism 300 is arranged on the top of valve gap 200.
In valve body 100, be provided with spool 130, valve seat 140 and valve rod 150, valve seat 140 is arranged in valve body 100 by a pad 141, the top of spool 130 and valve seat 140 are sealed and matched, one end of valve rod 150 is connected with spool 130 spirals, and its other end stretches out valve body 100 and is connected with driving mechanism 300 through valve gap 200.On spool 130, be arranged with restrictor ring 131 and current-sharing cover 132, be provided with some metering holes on current-sharing cover 132, regulating and controlling rating curve effectively, also has the energy supply abating the noise.
Valve seat 100 bottoms are provided with a protection disk 160, and protection is uniform on disk 160 is provided with some sieve apertures, in order to filter the impurity in warm water, also has the effect of balancing water pressure, reduces the cavitation erosion to spool 130.The top of spool 130 is provided with a groove concaving 133, and this groove 133 possesses in advance to be opened and the characteristic of closing that lags behind, and effectively reduces the injury of cavitation erosion.
In order further to reduce the infringement of cavitation erosion to spool, the surface deposited metal of spool 130 has one deck nitride layer, the thickness of this nitride layer is 5～15 μ m, make hardness and the erosive wear resistance of spool 130 be largely increased (hardness reaches HRC65-70), original serious erosion phenomenon is eliminated substantially, also extended 2～3 times working life, and nitrogenation treatment technology is maturation process, thereby cost is lower;
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. a Desuperheating water regulating valve, comprise valve body, the valve gap being fixedly connected with described valve body and the driving mechanism that is arranged on described valve gap top, described valve body both sides are provided with intake-outlet, in described valve body, be provided with a spool, one valve rod being fixedly connected with described spool and a valve seat coordinating with described spool top seal, this valve rod stretches out described valve body and is connected with described driving mechanism through described valve gap, it is characterized in that, described valve seat bottom is provided with a protection disk, described valve core upper sleeve is provided with restrictor ring and current-sharing cover, the surface deposited metal of described spool has a nitride layer.
2. Desuperheating water regulating valve as claimed in claim 1, is characterized in that, on described protection disk, is evenly installed with some sieve apertures.
3. Desuperheating water regulating valve as claimed in claim 1, is characterized in that, the top of described spool is provided with a groove concaving.
4. Desuperheating water regulating valve as claimed in claim 1, is characterized in that, the thickness of described nitride layer is 5-15 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420135935.6U CN203796998U (en) | 2014-03-24 | 2014-03-24 | Desuperheater water adjusting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420135935.6U CN203796998U (en) | 2014-03-24 | 2014-03-24 | Desuperheater water adjusting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203796998U true CN203796998U (en) | 2014-08-27 |
Family
ID=51379210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420135935.6U Expired - Lifetime CN203796998U (en) | 2014-03-24 | 2014-03-24 | Desuperheater water adjusting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203796998U (en) |
-
2014
- 2014-03-24 CN CN201420135935.6U patent/CN203796998U/en not_active Expired - Lifetime
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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 |
Granted publication date: 20140827 |
|
| CX01 | Expiry of patent term |