CN2714902Y - Anti-scour cavitation resistant and high pressure difference regulating valve - Google Patents
Anti-scour cavitation resistant and high pressure difference regulating valve Download PDFInfo
- Publication number
- CN2714902Y CN2714902Y CN 200420029602 CN200420029602U CN2714902Y CN 2714902 Y CN2714902 Y CN 2714902Y CN 200420029602 CN200420029602 CN 200420029602 CN 200420029602 U CN200420029602 U CN 200420029602U CN 2714902 Y CN2714902 Y CN 2714902Y
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- high pressure
- pressure difference
- valve
- regulating valve
- sleeve
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Abstract
An anti-scour cavitation resistant and high pressure difference regulating valve relates to a high pressure difference regulating valve. The utility model makes up the insufficiency of the traditional high pressure difference regulating valve and can extend the service life to 10-15 times when being used for adjusting the high pressure difference of the steam medium. The utility model comprises a valve body, an inlet path, a socket, a valve body inner chamber and a valve cock, the inlet path is connected with the inlet, the valve body inner chamber is connected with an outlet, and the wall of the socket is arranged with a throttle opening. The utility model is characterized in that the socket is a structural ceramic socket which is provided with two sealing sides, and wherein, the sealing side An is on the near inlet side at the bottom of the socket, the sealing side B is above the throttle opening, and the valve body inner chamber is covered with the structural ceramic. The utility model is used for industrial production such as petrochemical works or electric power, and the transmission of the high temperature and pressure steam created by the boiler needs the controlling of the pressure difference.
Description
Affiliated field
The utility model relates to a kind of high-differential-pressure regulating valve.Particularly a kind of antiscour high-differential-pressure regulating valve of anti-the cavitation.
Background technique
In industrial production such as petrochemical industry or electric power, the conveying of the high temperature and high pressure steam that used boiler produces needs modulating valve to control, owing to must have pressure in the delivery of steam, the pressure of being with produces souring to modulating valve, and scouring force has been accelerated the valve seat and the spool wearing and tearing of modulating valve; And modulating valve is under the High Pressure Difference state work, and high-pressure medium is by the valve under the state of High Pressure Difference the time, and the huge energy that discharges produces throttle elements such as the valve seat of valve and spools and destroys, and existing metallic material is difficult to resist this cavitation damage.When cavitation directly contacted with metallic material, very fast just can the generation cheated point and corrosion in the metal surface, damages until producing cellular cavity.
Present High Pressure Difference throttle valve comprises valve body, and inlet passage, sleeve, body cavity, valve plug, each parts are metal and make.Inlet passage links to each other with import, and body cavity links to each other with outlet, is provided with restriction on sleeve wall.Because sealing surface is near the restriction bottom, the position is near the restriction, therefore when high pressure steam passes through restriction, not only wash away the restriction of metal with cavitation, wash away the sealing surface of metal with cavitation simultaneously, in case restriction and sealing surface through washing away with cavitation after produce the hole point or be corroded, this High Pressure Difference throttle valve just loses the characteristic to Flow-rate adjustment, must change again.Therefore, high pressure steam affects the working life of the high-differential-pressure regulating valve of carrying high temperature and high pressure steam to the restriction of high-differential-pressure regulating valve metal sleeve and seriously washing away and cavitation of metallic sealing section, and working life is only at some months generally speaking.
Summary of the invention
The utility model aims to provide the high-differential-pressure regulating valve of the anti-cavitation of a kind of antiscour.It has remedied the deficiency of traditional high-differential-pressure regulating valve, when being used for the High Pressure Difference of steam regulation medium, can increase the service life.
The technical solution of the utility model is;
The utility model comprises valve body, inlet passage, sleeve, body cavity, valve plug; Inlet passage links to each other with import, and body cavity links to each other with outlet; On sleeve, be provided with restriction.It is characterized in that sleeve is the structural ceramics sleeve; Two sealing surfaces are arranged on the structural ceramics sleeve, and wherein near inlet passage one side, sealing surface B is above restriction at the cover tube bottom for sealing surface A; At body cavity lining structural ceramics.As shown in Figure 1.
Wherein structural ceramics can be a zirconia-based ceramics, and alumina-based ceramic also can be a mullite-based ceramic.
The utility model in use, high pressure steam enters inlet passage from the import of modulating valve, enters body cavity by the restriction on the sleeve because body cavity links to each other with outlet, so high pressure steam is by outlet outflow.
When valve plug inserted a sleeve part, valve plug hid a part with the throttle orifice of sleeve, and high pressure steam enters body cavity by the not covered part of restriction, flows out from outlet by body cavity.Because the flow of high pressure steam is restricted by restriction the time, so the pressure in high pressure steam outlet port will lower the High Pressure Difference in formation import and outlet port.Control valve plug inserts the position of sleeve, can regulate the covered area of restriction, just can regulate the rate-of flow by restriction, also just can regulate the High Pressure Difference in import and outlet port.
When valve plug inserted the cover tube bottom by restriction, the bottom of valve plug joined with the sealing surface A of cover tube bottom, and the sealing surface B on valve plug top and restriction top joins simultaneously, and high pressure steam no longer enters body cavity.
Because structural ceramics has the high hardness above metal, high abrasion, the performance of antiscour and anti-cavitation, for traditional metal sleeve, the structural ceramics sleeve more can antiscour and anti-cavitation, therefore, has improved the antiscour and the anti-cavitation performance of restriction.
Because sealing surface A of the present utility model is arranged on the side of the bottom of sleeve near inlet passage, distance between sealing surface and the restriction increases,, can not produce sealing surface and directly to wash away and cavitation when the restriction at high pressure steam, improve the antiscour of sealing surface and the performance of anti-cavitation.
Because of the present utility model,, reduced impact and the cavitation of high pressure steam to metallic matrix contacting of the metallic matrix of the isolated high pressure steam of the part of lining structural ceramics and valve body at body cavity lining structural ceramics.The antiscour of body cavity integral body and the performance of anti-cavitation have been improved.
In sum, the utility model is the high-differential-pressure regulating valve of the anti-cavitation of a kind of antiscour.It can increase the service life when being used for the High Pressure Difference of steam regulation medium.
Description of drawings:
Fig. 1 is the utility model generalized section.
Among the figure, 1-valve body, 2-inlet passage, 3-sleeve, 4-body cavity, 5-restriction, 6-sealing surface A, 7-sealing surface B, 8-valve plug, 9-outlet, 10-import, 11-structure ceramic layer.
Embodiment;
Embodiment:
When the utility model is used for the vapor pressure difference 3.7Mpa system of valve inlet and outlet;
With the specification employing PN of valve body 1 of the present utility model is 64Mpa, and DN adopts 50mm.Wherein, sleeve 3 diameters are 70mm, high 40mm; Evenly be provided with 4 restrictions 5 on the barrel, restriction 5 is 3mm with the distance of sealing surface A6; At import 10 and outlet 9 place's lining structure ceramic layers 11 of valve body 1, at the bottom of inlet passage 2 and the position lining structure ceramic layer 11 near outlet 9 of body cavity 4.
When valve plug 8 inserts sleeve 3 parts, valve plug 8 hides a part with restriction on the barrel of sleeve 35, high pressure steam enters inlet passage 2 by import 10, and enters body cavity 4 by the not covered part of restriction 5, flows out from exporting 9 by body cavity 4.The flow of high pressure steam is restricted when the restriction 5, so the pressure that high pressure steam exports 9 places will lower, and forms the High Pressure Difference at import 10 and outlet 9 places.Restriction 5 covered areas can be regulated in the position that control valve plug 8 inserts sleeve 3, just can regulate the rate-of flow by restriction 5, also just can regulate import 10 and the High Pressure Difference that exports 9 places.
When valve plug 8 inserted sleeve 3 bottoms by restriction 5, the sealing surface A 6 of the bottom of valve plug 8 and sleeve 3 bottoms joined, and the sealing surface B7 on the top of valve plug 8 and sleeve 3 tops joins, and high pressure steam no longer enters body cavity 4.
When rated flow coefficient is Kv 40, when allowing leakage rate to be 6.25l/mim, the relative opening degree and the High Pressure Difference of valve plug 7 are linear.
Because sleeve 3 of the present utility model is the structural ceramics sleeve, restriction 5 is 3mm with the distance of sealing surface A6; At import 10 and outlet 9 place's lining structure ceramic layers 11 of valve body 1, at the bottom of inlet passage 2 and the close outlet position lining structure ceramic layer 11 of body cavity 4, improved the performance of the anti-cavitation of antiscour, working life is about a year and a half.
Claims (4)
1, a kind of antiscour high-differential-pressure regulating valve of anti-the cavitation comprises valve body, inlet passage, sleeve, body cavity, valve plug; Inlet passage links to each other with import, and body cavity links to each other with outlet; On sleeve, be provided with restriction; It is characterized in that sleeve is the structural ceramics sleeve, two sealing surfaces are arranged on the structural ceramics sleeve, wherein near inlet passage one side, sealing surface B is above restriction at the cover tube bottom for sealing surface A; At body cavity lining structural ceramics.
2, according to the described antiscour of claim 1 high-differential-pressure regulating valve of anti-the cavitation, it is characterized in that structural ceramics is a zirconia-based ceramics.
3, according to the described antiscour of claim 1 high-differential-pressure regulating valve of anti-the cavitation, it is characterized in that structural ceramics is an alumina-based ceramic, also can be mullite-based ceramic.
4, according to the described antiscour of claim 1 high-differential-pressure regulating valve of anti-the cavitation, it is characterized in that structural ceramics is a mullite-based ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420029602 CN2714902Y (en) | 2004-08-24 | 2004-08-24 | Anti-scour cavitation resistant and high pressure difference regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420029602 CN2714902Y (en) | 2004-08-24 | 2004-08-24 | Anti-scour cavitation resistant and high pressure difference regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2714902Y true CN2714902Y (en) | 2005-08-03 |
Family
ID=34871174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420029602 Expired - Fee Related CN2714902Y (en) | 2004-08-24 | 2004-08-24 | Anti-scour cavitation resistant and high pressure difference regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2714902Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101663526B (en) * | 2007-08-01 | 2012-08-22 | 株式会社巴技术研究所 | Cavitation preventive high differential pressure control valve |
| CN106106044A (en) * | 2016-06-21 | 2016-11-16 | 中国灌溉排水发展中心 | A kind of multi-functional device for fetching water and application thereof |
-
2004
- 2004-08-24 CN CN 200420029602 patent/CN2714902Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101663526B (en) * | 2007-08-01 | 2012-08-22 | 株式会社巴技术研究所 | Cavitation preventive high differential pressure control valve |
| CN106106044A (en) * | 2016-06-21 | 2016-11-16 | 中国灌溉排水发展中心 | A kind of multi-functional device for fetching water and application thereof |
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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: 20050803 Termination date: 20120824 |