CN2503285Y - Pressure reducing constant-current valve - Google Patents
Pressure reducing constant-current valve Download PDFInfo
- Publication number
- CN2503285Y CN2503285Y CN 01262647 CN01262647U CN2503285Y CN 2503285 Y CN2503285 Y CN 2503285Y CN 01262647 CN01262647 CN 01262647 CN 01262647 U CN01262647 U CN 01262647U CN 2503285 Y CN2503285 Y CN 2503285Y
- Authority
- CN
- China
- Prior art keywords
- valve body
- valve
- spring
- spool
- flow
- 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 discloses a pressure decreasing permanent flow valve including a valve body of an upper valve body 4 and a lower valve body, a regulation screw rod 6 fixed with a handle 7 and connected with the upper valve body 4 through a screw thread, a valve plug seat 3 fixed on the lower valve body 1, a valve plug sleeved inside the valve plug seat 3, a principal spring 6 sleeved on the regulation screw rod 6, a pressing cover 9 for supporting the principal spring 6 and a film 10 with two ends clamped between the upper valve body 4 and the lower valve body 1; wherein, the pressing cover 9 is supported on the film 10. The utility model is characterized in that: the bottom of the lower valve body 1 is fixed with a spring seat 15 that supports a returning spring 14; the lower part of the valve plug is supported on the returning spring 14; and the top of the valve plug 12 is in contact with the bottom of the pressing cover 9. The utility model automatically regulates the valve opening angle according to the pressure and flow change of the vapor sample, thereby maintaining a permanent flow at the vapor outlet.
Description
Technical field
The utility model relates to a kind of decompression permanent-flow valve, mainly is used in the water and steam sampling system of thermal power plant.
Background technique
In water and steam sampling system of thermal power plant, in time, on-line monitoring steam sample quality exactly, need on-line continuous to gather the steam sample, must guarantee flow, the pressure substantially constant of steam sample simultaneously.And in fact the pressure of steam sample, flow are to change along with the factors such as load of generator set are continuous.The pressure loading valve that is used for the water and steam sampling system at present, its flow, pressure are regulated and are all regulated manually.As the disclosed a kind of adjustable constant voltage reduction valve of Chinese patent CN2087215U, also realize constant voltage by regulating.Modulating valve not only bothers effort manually, and at all can't timely constant sample flow, pressure.Thereby the promptness and the accuracy of on-line monitoring steam sample have been influenced.
Summary of the invention
The purpose of this utility model provide a kind of can be with the pressure of steam sample, changes in flow rate and automatic regulating valve mouth aperture, thereby keep the decompression permanent-flow valve of steam sample export constant flow.
The technological scheme that realizes above-mentioned purpose is: a kind of decompression permanent-flow valve, comprise the valve body of forming by upper valve body and following valve body, be fixed with handle and be threaded in adjusting screw rod on the upper valve body, be fixed on down the valve core case on the valve body, be through the spool in the valve core case, be sleeved on the main spring on the adjusting screw rod, the gland of supporting main spring, two ends are clamped in the diaphragm between upper valve body and the following valve body, gland is bearing on the diaphragm, and the bottom of following valve body is fixed with spring seat, and the spring seat upper support has Returnning spring, and the lower support of spool is on Returnning spring, and the top of spool contacts with the bottom of gland.
After adopting technique scheme, the bottom of following valve body is fixed with spring seat, and the spring seat upper support has Returnning spring, and the lower end of spool is bearing on the Returnning spring, and the top of spool contacts with the bottom of gland.Like this, spool floats under the upper and lower effect of main spring and Returnning spring, so the aperture of valve port can be regulated automatically with the pressure of steam sample, changes in flow rate between spool and valve core case, reaches the purpose that keeps steam sample export constant flow.In addition, can only need the regulating valve handle just can set the valve port initial opening according to flow, pressure state and the output flow requirement of different sampling points.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an another kind of structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 1, a kind of decompression permanent-flow valve, comprise the valve body of forming by upper valve body 4 and following valve body 1, be fixed with handle 8 and be threaded in adjusting screw rod 6 on the upper valve body 4, be fixed on down the valve core case 3 on the valve body 1, be through the spool 12 in the valve core case, be sleeved on the main spring 5 on the adjusting screw rod 6, the gland 9 of supporting main spring 6, two ends are clamped in the diaphragm 10 between upper valve body 4 and the following valve body 1, gland is bearing on the diaphragm 10, the bottom thread of following valve body 1 is connected with spring seat 15, has sealing gasket 17 between spring seat 15 and the following valve body 1, and spring seat 15 upper supports have Returnning spring 14, and the lower support of spool 12 is on Returnning spring 14, and the top of spool 12 contacts with the bottom of gland 9.Valve core case 3 is threaded with following valve body 1, and has seal ring 11 between valve core case 3 and the following valve body 1.Adjusting screw rod 6 is fixing by nut 8 with handle 7.
As shown in Figure 2, another kind of structural type of the present utility model, the middle part of diaphragm 10 is elastic bellows 10-1 among the figure, gland 9 is bearing on this elastic bellows 10-1.Adopt this structure, can improve the elasticity coefficient of diaphragm 10, and can prevent that gland 9 from damaging diaphragm 10, improves the working life of diaphragm 10.
As shown in Figure 1, 2, have decompression groove 16 on the spool, can realize preliminary decompression, alleviate the working pressure of valve port.
Diaphragm 10 among Fig. 1,2 can adopt stainless steel to make, and improves the corrosion resistance of diaphragm 10.
During the utility model work, the steam sample enters down valve body from valve inlet 13, through the decompression groove 16 on the spool 12, the steam sample is tentatively reduced pressure, arrive the valve port place of 3 of spool 12 and valve core cases then, spool 12 floats under the effect up and down main spring 5 and Returnning spring 14, when the steam sample strain becomes big or valve export place 2 flows when increasing, it is big that the flow resistance at valve port place also becomes thereupon, and at this moment, the pressure of valve body cavity of resorption increases simultaneously, at this moment, spool 12 under the effect of following cavity pressure will on move, dwindle valve port opening automatically, reduce valve export place 2 flows; When the steam sample strain diminishes or valve export place 2 flows when reducing, the flow resistance at valve port place also can diminish thereupon, the pressure of valve body epicoele reduces simultaneously, this moment is under the pressure effect of main spring 5, stainless steel diaphragm 10 or elastic bellows 10-1 move down, promote spool 12 by gland 9 and move down, increase valve port opening automatically, increase the flow at valve export place 2.So the aperture of spool 12 and 3 valve ports of valve core case can be regulated automatically with the pressure of steam sample, changes in flow rate, reach and keep the constant purpose of steam sample flow.
The utility model does not stop up, and unpicks and washes conveniently, can realize the over-temp and over-pressure protection, and under some special operation conditions, valve can be closed automatically with protection water and steam sampling system.
Claims (3)
1, a kind of decompression permanent-flow valve, comprise the valve body of forming by upper valve body (4) and following valve body (1), be fixed with handle (7) and be threaded in adjusting screw rod (6) on the upper valve body (4), be fixed on down the valve core case (3) on the valve body (1), be through the spool (12) in the valve core case (3), be sleeved on the main spring (5) on the adjusting screw rod (6), the gland (9) of supporting main spring (5), two ends are clamped in the diaphragm (10) between upper valve body (4) and the following valve body (1), gland (9) is bearing on the diaphragm (10), it is characterized in that: the bottom of following valve body (1) is fixed with spring seat (15), spring seat (15) upper support has Returnning spring (14), and the lower support of spool (12) is on Returnning spring (14), and the top of spool (12) contacts with the bottom of gland (9).
2, decompression permanent-flow valve according to claim 1 is characterized in that: the middle part of diaphragm (10) is elastic bellows (10-1), and gland (9) is bearing on this elastic bellows (10-1).
3, decompression permanent-flow valve according to claim 1 and 2 is characterized in that: have decompression groove (16) on the spool (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01262647 CN2503285Y (en) | 2001-09-06 | 2001-09-06 | Pressure reducing constant-current valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01262647 CN2503285Y (en) | 2001-09-06 | 2001-09-06 | Pressure reducing constant-current valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2503285Y true CN2503285Y (en) | 2002-07-31 |
Family
ID=33670360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01262647 Expired - Fee Related CN2503285Y (en) | 2001-09-06 | 2001-09-06 | Pressure reducing constant-current valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2503285Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224610A (en) * | 2016-09-18 | 2016-12-14 | 重庆科技学院 | A kind of fluid feed flow is automatically adjusted permanent flow valve |
| CN107605429A (en) * | 2017-09-08 | 2018-01-19 | 赵越 | A kind of pipe pressure for oil exploitation eliminates sampling valve device |
-
2001
- 2001-09-06 CN CN 01262647 patent/CN2503285Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224610A (en) * | 2016-09-18 | 2016-12-14 | 重庆科技学院 | A kind of fluid feed flow is automatically adjusted permanent flow valve |
| CN107605429A (en) * | 2017-09-08 | 2018-01-19 | 赵越 | A kind of pipe pressure for oil exploitation eliminates sampling valve device |
| CN107605429B (en) * | 2017-09-08 | 2022-05-20 | 赵越 | Pipe pressure eliminating and sampling valve device for oil exploitation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |