CN203703286U - Structure of high-pressure-difference regulating valve - Google Patents
Structure of high-pressure-difference regulating valve Download PDFInfo
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- CN203703286U CN203703286U CN201420044593.7U CN201420044593U CN203703286U CN 203703286 U CN203703286 U CN 203703286U CN 201420044593 U CN201420044593 U CN 201420044593U CN 203703286 U CN203703286 U CN 203703286U
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- valve seat
- assembly
- pressure
- regulating valve
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Abstract
The utility model discloses a structure of a high-pressure-difference regulating valve. The structure of the high-pressure-difference regulating valve is mainly and technically characterized in that a multi-level throttling assembly is arranged at the bottom of a valve seat, a main body portion of a valve plug assembly and a sealing surface on the valve plug assembly are located on the top of the valve seat, the lower end of the sealing surface of the valve plug assembly downwards extends to form a cylindrical throttling sleeve, and a plurality of through-flow windows are formed in the upper end of the throttling sleeve; an upper cavity of a valve body is communicated with the medium inlet end of the high-pressure-difference regulating valve, and a lower cavity of the valve body is communicated with the medium outlet end of the high-pressure-difference regulating valve; in addition, a sealing ring is installed on the outer circle of the valve seat so that the upper cavity and the lower cavity of the valve body can be separated in a sealing mode; the valve seat and the multi-level throttling assembly at the bottom of the valve seat are tightly pressed at the same time by pressing parts on the upper side of the valve seat in a jacking mode. According to the structural mode, sealing reliability of the high-pressure-difference regulating valve can be ensured, and meanwhile it is ensured that scouring and cavitation damage of the sealing surface under the condition of the small opening can be reduced or eliminated.
Description
Technical field
The utility model relates to a kind of valve mechanism, is specifically related to a kind of structure of high-differential-pressure regulating valve.
Background technique
High-differential-pressure regulating valve is important valve and the critical valves in unit and the system of the industry such as power station, petrochemical industry, as the minimum flow valve of thermal power plant water supply system (giving water recycle modulating valve), while use on super (super-) critical unit, the Maximum differential pressure of its entrance end can reach 40MPa, and in the time of valve closing, need to guarantee to reach zero leakage, working condition requirement is extremely harsh.In addition, in the industry such as petrochemical industry, the Coal Chemical Industry also more supporting high-differential-pressure regulating valve that are installed have harsh usage requirement.The high-differential-pressure regulating valve of the harsh operating mode of this class of installing and using on current domestic unit and equipment is gone back dependence on import substantially.Compared with the product of domestic manufacturer, the high-differential-pressure regulating valve of import has more reliable and stable usability and relatively long working life, but due to the restriction of product structure design aspect, also there are in use some shortcomings in imported product, as minimum flow valve, the product that domestic main imported product is U.S. CCI and Copes-Vulcan company at present, the labyrinth minimum flow valve of CCI adopts the design of stream pass type in order to improve the sealability of valve, cause valve sealing surface in the time of little aperture operation can be subject to more serious washing away, the quick closedown when service condition of valve of having to is set to arrive 10% aperture, and the minimum flow valve product of Copes-Vulcan company, in order to overcome this defect, adopt the design of stream open form, although product can be in little aperture operation, but because valve pressure is high, the design of flowing open form while closing is unfavorable for the sealing of valve very much.
Reflected as shown in Figure 1 at present the basic position relationship between the valve seat of high-differential-pressure regulating valve product, spool, throttling element (sleeve assembly) three both at home and abroad, spool and throttling element (sleeve assembly) be all positioned at the top of valve seat.When valve is that stream pass type is while being the design of upper entering and lower leaving, medium is from throttling element (sleeve assembly) lateral intermediate flow, when valve closing, pressure medium acts on the sealability that can greatly improve valve on spool, but valve is in the time of little aperture operation, because pressure reduction is now the highest and medium volumetric expansion flow velocity after decompression increases, the sealing surface of valve seat and spool can be subject to more serious washing away and even cavitation erosion; In the time that valve adopts stream open form to be the design of bottom in and top out, medium is to flow laterally in the middle of throttling element (sleeve assembly), when little aperture operation, the sealing surface of valve seat and spool is washed away with the possibility of cavitation erosion by medium and will be significantly smaller than aforesaid stream pass type structure, but high-pressure medium acts on spool below when valve closing, medium can be unfavorable for valve realization sealing reliably to the upper top power of spool very much.The combination form of the valve seat taked for existing high-differential-pressure regulating valve, spool, throttling element (sleeve assembly), no matter flow to How to choose, when guaranteeing the sealing reliability of valve and reducing little aperture, the cavitation erosion that washes away of sealing surface is all conflict, can not take into account both simultaneously, can only the two get one, and it be all very important for the two should to say concerning the usability of valve.Therefore,, in order to improve usability and the working life of high-differential-pressure regulating valve product, aspect the combination form of the valve seat of high-differential-pressure regulating valve, spool, throttling element (sleeve assembly), need to set up a kind of new structure and pattern.
Summary of the invention
In order to overcome existing high-differential-pressure regulating valve product existing above-mentioned sealability that can not guarantee product and guarantee the deficiency of product reliably working when the little aperture in structural design simultaneously, the utility model provides a kind of structure of new high-differential-pressure regulating valve.
To achieve these goals, the utility model is by the following technical solutions:
A kind of structure of new high-differential-pressure regulating valve, it comprises valve body, multistage throttle assembly, valve seat, spool or mangetic core assembly, on spool or mangetic core assembly and valve seat, there is respectively sealing surface and match during at valve closing, its major technique key is: valve seat is positioned in the middle of the epicoele and cavity of resorption of valve body, multistage throttle assembly is arranged on to the below of valve seat, the main body of spool or mangetic core assembly with and on sealing surface be positioned at the top of valve seat; Main body at spool or mangetic core assembly is down extended with throttle sleeve cylindraceous from sealing surface lower end, the middle endoporus of the cylindrical of throttle sleeve and multistage throttle assembly matches and merges and can move up and down therein, and the upper end of throttle sleeve has multiple through-flow windows; The epicoele of valve body is communicated with the medium inlet end of valve, and the cavity of resorption of valve body is communicated with the media outlet end of valve.
Above-mentioned orifice union refers to common the adopted porous restriction sleeve of high-differential-pressure regulating valve or multistage porous restriction sleeve, labyrinth throttling disc group, the combination of multi-layer porous throttling disc and other the throttle structure with good decompression reduction of speed ability; Spool or mangetic core assembly can be both single spools, also can be by being formed as some parts that leading type spool, multi-sealed etc. arranges by realizing certain functional requirement.
The above-mentioned technological scheme proposing in order to realize more simply, easily the utility model, the utility model also adds two following technological schemes in addition:
Be installed on seal ring between valve seat and valve body at the cylindrical position of valve seat, between the epicoele to valve body and cavity of resorption, seal partition.
Compress and the multistage throttle assembly of fixed valve base and its downside by being arranged on other part of compressing structure top pressure valve seat upside of body cavity upper end simultaneously.
The beneficial effects of the utility model are: adopt the structural type of the high-differential-pressure regulating valve that proposes of the utility model, the washing away of sealing surface, cavitation erosion when can guaranteeing the sealing reliability of valve simultaneously and reducing or eliminate little aperture.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the combination form of valve seat, spool, the throttling element (sleeve assembly) of existing high-differential-pressure regulating valve product.
Fig. 2 is the structural representation of a concrete application of the structural type of high-differential-pressure regulating valve provided by the utility model.
In figure, 1, valve body; 2, multistage throttle assembly; 3, seal ring; 4, valve seat; 5, spool or mangetic core assembly;
5-1, throttle sleeve; 5-2, through-flow window.
Embodiment
Below in conjunction with drawings and Examples, the technical solution of the utility model is further elaborated.
As shown in Figure 2, be the structural representation of the structural type of the high-differential-pressure regulating valve that proposes of a utility model concrete application aspect heat power station water supply system valve.This structure comprises the parts such as valve body (1), multistage throttle assembly (2), valve seat (4), spool or mangetic core assembly (5), while having respectively through the cobalt-based sealing surface of built-up welding and processing and at valve closing, matches on spool or mangetic core assembly (5) and valve seat (4).The major technique key of this structure is: the main body of below, spool or mangetic core assembly (5) that valve seat (4) is positioned in the middle of the epicoele and cavity of resorption of valve body (1), multistage throttle assembly (2) is arranged on valve seat (4) with and on sealing surface be positioned at the top of valve seat (4); Main body at spool or mangetic core assembly (5) is down extended with throttle sleeve cylindraceous (5-1) from sealing surface lower end, the middle endoporus of the cylindrical of throttle sleeve (5-1) and multistage throttle assembly (2) matches and merges the outflow area that can move up and down therein to change medium with adjust flux, and the upper end of throttle sleeve (5-1) has multiple through-flow windows (5-2); The epicoele of valve body (1) is communicated with the medium inlet end of valve, and the cavity of resorption of valve body (1) is communicated with the media outlet end of valve.
What aforesaid multistage throttle assembly (2) adopted in the present embodiment is the labyrinth throttling disc group with excellent throttling reduction of speed performance, and aforesaid spool or mangetic core assembly (5) are designed in the present embodiment with the composite structure of leading type small valve core and soft or hard double seal face, the mangetic core assembly that constituted by some parts; When valve operation, mangetic core assembly is opened, the endoporus of the medium through-flow window (5-2) on the throttle sleeve (5-1) of mangetic core assembly lower end and throttle sleeve (5-1) by the epicoele of valve body (1) is circulated to the inner chamber of labyrinth throttling disc group, driving the throttle sleeve (5-1) of mangetic core assembly lower end to move up and down by the driving mechanism of valve regulates, makes a certain amount of medium flow out to cavity of resorption and the valve export of valve body (1) through labyrinth channel from labyrinth throttling disc group inner chamber.
In the structural type of existing high-differential-pressure regulating valve, to fully guarantee the sealability of valve, need to make medium flow by the direction of upper entering and lower leaving, and medium is during by the flowing to of upper entering and lower leaving, must be again from flowing in the lateral of multistage throttle assembly, cause the valve can not reliably working in the time of little aperture.Essence of the present utility model is exactly that the position of the multistage throttle assembly in existing structure pattern is replaced into the below that is positioned at valve seat by the top that is positioned at valve seat, guaranteeing that MEDIA FLOW is to being under the prerequisite of upper entering and lower leaving like this, the flow direction of medium when by multistage throttle assembly becomes from inside to outside, thereby guaranteed that valve can normally and reliably work in the time of little aperture.Thereby the sealing surface that new structure not only makes valve seat and mangetic core assembly can make sealing surface keep good and lasting sealability be no longer positioned at the restriction of multistage throttle assembly in the time of little aperture and normal aperture near, and flow through throttle sleeve top and the medium that enters multistage throttle assembly is also the medium without step-down, also can be washed away and cavitation erosion without the top throttleng surface of worrying throttle sleeve.
The structure proposing in order to realize more simply the utility model, convenient for assembly and maintenance, the present embodiment has also been taked in addition two following technological schemes on the basis of above-mentioned basic structure:
Cylindrical position at valve seat (4) is installed between valve seat (4) and valve body (1) with seal ring (3), between the epicoele to valve body (1) and cavity of resorption, seals partition.Seal ring (3) adopts resistant to elevated temperatures fluororubber O-type ring.
By being arranged on, the part of compressing structure top pressure valve seat (4) upside at pendant collet place, valve body (1) inner chamber upper end compresses simultaneously and the multistage throttle assembly (2) of fixed valve base (4) and its downside, make valve can be under High Pressure Difference operating mode reliably working.
Below by reference to the accompanying drawings embodiment of the present utility model is described, but these explanations can not be understood to limit scope of the present utility model.Those skilled in the art should know; the utility model is not restricted to the described embodiments; its protection domain is defined by appending claims; any not exceeding the various changes in the scope that the utility model claims define, the technological scheme that modification forms; all do not depart from spirit of the present utility model and technical spirit, within still can belonging to claim scope of the present utility model.
Claims (3)
1. the structure of a high-differential-pressure regulating valve, it comprises valve body (1), multistage throttle assembly (2), valve seat (4), spool or mangetic core assembly (5), on spool or mangetic core assembly (5) and valve seat (4), have respectively sealing surface and match during at valve closing, it is characterized in that: valve seat (4) is positioned in the middle of the epicoele and cavity of resorption of valve body (1), in the below of valve seat (4) be multistage throttle assembly (2), spool or mangetic core assembly (5) main body with and on sealing surface be positioned at the top of valve seat (4); Main body at spool or mangetic core assembly (5) is down extended with throttle sleeve cylindraceous (5-1) from sealing surface lower end, the middle endoporus of the cylindrical of throttle sleeve (5-1) and multistage throttle assembly (2) matches and merges and can move up and down therein, and the upper end of throttle sleeve (5-1) has multiple through-flow windows (5-2); The epicoele of valve body (1) is communicated with the medium inlet end of valve, and the cavity of resorption of valve body (1) is communicated with the media outlet end of valve.
2. the structure of high-differential-pressure regulating valve according to claim 1, it is characterized in that: the cylindrical position at valve seat (4) is installed between valve seat (4) and valve body (1) with seal ring (3), between the epicoele to valve body (1) and cavity of resorption, seals partition.
3. the structure of high-differential-pressure regulating valve according to claim 1, is characterized in that: by being arranged on, other part of compressing structure top pressure valve seat (4) upside of valve body (1) inner chamber upper end compresses simultaneously and the multistage throttle assembly (2) of fixed valve base (4) and its downside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420044593.7U CN203703286U (en) | 2014-01-23 | 2014-01-23 | Structure of high-pressure-difference regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420044593.7U CN203703286U (en) | 2014-01-23 | 2014-01-23 | Structure of high-pressure-difference regulating valve |
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| Publication Number | Publication Date |
|---|---|
| CN203703286U true CN203703286U (en) | 2014-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420044593.7U Expired - Fee Related CN203703286U (en) | 2014-01-23 | 2014-01-23 | Structure of high-pressure-difference regulating valve |
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| Country | Link |
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| CN (1) | CN203703286U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742693A (en) * | 2014-01-23 | 2014-04-23 | 章华 | High-pressure-difference adjusting valve structure |
-
2014
- 2014-01-23 CN CN201420044593.7U patent/CN203703286U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742693A (en) * | 2014-01-23 | 2014-04-23 | 章华 | High-pressure-difference adjusting valve structure |
| CN103742693B (en) * | 2014-01-23 | 2017-02-08 | 章华 | High-pressure-difference adjusting valve structure |
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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: 20140709 Termination date: 20170123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |