CN202768896U - Multi-stage valve core structure of adjusting valve - Google Patents
Multi-stage valve core structure of adjusting valve Download PDFInfo
- Publication number
- CN202768896U CN202768896U CN 201220430724 CN201220430724U CN202768896U CN 202768896 U CN202768896 U CN 202768896U CN 201220430724 CN201220430724 CN 201220430724 CN 201220430724 U CN201220430724 U CN 201220430724U CN 202768896 U CN202768896 U CN 202768896U
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- Prior art keywords
- valve core
- valve
- valve seat
- stage
- spool
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- Expired - Fee Related
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Abstract
The utility model discloses a multi-stage valve core structure of an adjusting valve. The multi-stage valve core structure comprises a valve seat and a valve core. The valve core is inserted into the valve seat in a penetrating mode. The upper section of the valve core is a cylinder, and the lower section of the valve core is in a cone structure. A sealing face is arranged between the upper section and the lower section of the valve core. The sealing face is attached to the valve seat. The lower section of the valve core is provided with multiple radial continuous grooves, and gaps exist between the lower section of the valve core and the valve seat. The multi-stage valve core structure is suitable for working conditions with large initial load and normal working load, is easy and convenient to machine and free of traditional multi-stage sleeves and labyrinth-type lamination, and greatly reduces cost.
Description
Technical field
The utility model relates to a kind of modulating valve multiple step plug structure, belongs to valve technology field.
Background technique
Now, process control parameters presents variation, pump discharge modulating valve commonly used, because centrifugal pump characteristics, the working pressure of pipeline changes with the flow of pump; Pressure reduction is maximum when pump just starts, and flow is minimum, along with flow increases pressure decreased.For modulating valve, during the stage, suffered pressure reduction is maximum, bears the High Pressure Difference pressure drop at pump startup; Normal working, along with flow rises gradually, the pressure of pump falls after rise, and the pressure behind the modulating valve valve also raises gradually, and at this moment pressure reduction reduces gradually, and modulating valve becomes the low voltage difference operating mode.Existing high-differential-pressure regulating valve technology only proposes solution for the High Pressure Difference operating mode, and step-down progression is fixing immutable, and this just causes when starting and meets the demands, and produces flow situation less than normal in normal working.And common modulating valve, although can satisfy normal operation, the High Pressure Difference operating mode when starting very easily produces cavitation erosion to valve, the injury of flash distillation affects the life-span.
The model utility content
The utility model proposes a kind of modulating valve multiple step plug structure, the adjusting of pressure in the time of High Pressure Difference operating mode and nominal situation can't being satisfied simultaneously in order to solve traditional modulating valve.
For realizing this purpose, the method that the utility model adopts is: a kind of modulating valve multiple step plug structure comprises valve seat and spool, spool interts in valve seat, the epimere of described spool is cylindrical structure, and hypomere is conical structure, and the spool hypomere is provided with many radially continuous grooves.
There is the gap between the hypomere of described spool and the valve seat.
Be provided with a sealing surface between the epimere of spool and the hypomere, sealing surface and valve seat are bonded to each other.
Its beneficial effect is: but the utility model simultaneous adaptation High Pressure Difference is easy to process and cost is lower to the operating mode of low voltage difference transition.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the sectional structure chart of the utility model when not opening;
Fig. 2 is the sectional structure chart after the utility model begins.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Can't the simultaneous adaptation High Pressure Difference and the problem of low voltage difference operating mode for solving traditional modulating valve, the utility model proposes a kind of modulating valve multiple step plug structure as shown in Figure 1, comprise valve seat 2 and spool 1, spool 1 interts in valve seat 2, spool 1 is divided into epimere and hypomere, epimere is cylindrical structure, hypomere is conical structure, be provided with successively many radially continuous grooves 3 on spool 1 hypomere, there is certain gap 4 between spool 1 hypomere and the valve seat 2, be provided with sealing surface 5 between spool 1 epimere and the hypomere, sealing surface 5 is bonded to each other with valve seat 2.
When modulating valve during in opening state, as shown in Figure 2, flow stream when groove 3 enlarges, and stream dwindles when flowing through gap 4, and the continuous expansion of stream is dwindled and formed the labyrinth effect, causes the continuous pressure loss.In the original state of opening, there is minimum value in gap 4, and the expansion compression ratio of this moment is maximum, and along with the rising of spool, gap 4 increases gradually, and expand compression ratio and reduce gradually this moment.According to fluid mechanics, the expansion compression ratio of fluid is relevant with droop loss, and namely the original state spool bears the pressure drop maximum; the valve negotiability is minimum, along with aperture increases, bears pressure drop and progressively reduces; the labyrinth effect also fades away, and returns to the level of common valve, valve negotiability normalization.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (3)
1. modulating valve multiple step plug structure, comprise valve seat (2) and spool (1), spool (1) interts in valve seat (2), it is characterized in that, the epimere of described spool (1) is cylindrical structure, hypomere is conical structure, and spool (1) hypomere is provided with many radially continuous grooves (3).
2. modulating valve multiple step plug structure according to claim 1 is characterized in that, has gap (4) between the hypomere of described spool (1) and the valve seat (2).
3. modulating valve multiple step plug structure according to claim 1 is characterized in that, is provided with a sealing surface (5) between the epimere of spool (1) and the hypomere, and sealing surface (5) is bonded to each other with valve seat (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220430724 CN202768896U (en) | 2012-08-29 | 2012-08-29 | Multi-stage valve core structure of adjusting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220430724 CN202768896U (en) | 2012-08-29 | 2012-08-29 | Multi-stage valve core structure of adjusting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202768896U true CN202768896U (en) | 2013-03-06 |
Family
ID=47775471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220430724 Expired - Fee Related CN202768896U (en) | 2012-08-29 | 2012-08-29 | Multi-stage valve core structure of adjusting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202768896U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422881A (en) * | 2015-09-25 | 2016-03-23 | 上海发电设备成套设计研究院 | Valve clack of labyrinth type release valve |
-
2012
- 2012-08-29 CN CN 201220430724 patent/CN202768896U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422881A (en) * | 2015-09-25 | 2016-03-23 | 上海发电设备成套设计研究院 | Valve clack of labyrinth type release valve |
| CN105422881B (en) * | 2015-09-25 | 2018-04-20 | 上海发电设备成套设计研究院 | A kind of labyrinth type discharge valve flap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20190829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |