CN201212575Y - Pilot double-piston high differential pressure reducing valve - Google Patents
Pilot double-piston high differential pressure reducing valve Download PDFInfo
- Publication number
- CN201212575Y CN201212575Y CNU2008201029365U CN200820102936U CN201212575Y CN 201212575 Y CN201212575 Y CN 201212575Y CN U2008201029365 U CNU2008201029365 U CN U2008201029365U CN 200820102936 U CN200820102936 U CN 200820102936U CN 201212575 Y CN201212575 Y CN 201212575Y
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- piston
- valve
- pilot
- small piston
- pilot valve
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- Expired - Fee Related
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Abstract
The utility model discloses a pilot-operated double-piston pressure-reducing valve with high pressure difference, which comprises a pilot valve and a main valve, wherein the pilot-operated double-piston pressure-reducing valve with the high pressure difference is provided with a small piston, the small piston is arranged in a small cylinder-liner cylinder body on a pilot valve to replace a diaphragm on the pilot valve of the known pilot-operated piston pressure-reducing valve, the lower part of the small piston is pushed to the valve rod of the pilot valve, the head part of the small piston is sleeved in the lower end of an adjusting spring, the upper end of the adjusting spring is sleeved in the lower end of the spring seat, and the lower end of the adjusting screw of the pilot valve is pushed to the groove at the upper end of the spring seat.
Description
Technical field
The utility model relates to a kind of leading type double-piston High Pressure Difference reduction valve.
Background technique
At present, known leading type piston reduction valve structure, comprise main valve and pilot valve two-part, as (the practical valve design handbook) published mechanical publishing house in September, 2007--as described in the 589th page of the Lu Peiwen chief editor, second edition, (as shown in Figure 1), wherein piston is single piston (to call big piston in the following text), set outlet pressure by regulating Regulation spring pressure, utilize diaphragm sensing outlet pressure to change, open and close the size realization decompression voltage stabilizing function that driven plunger is regulated main valve throttling position area of passage by pilot valve.But general reduction valve is at pressure〉under the pressure of 6.4Mpa, diaphragm cannot stand the impact of high pressure, and diaphragm will be out of shape in the high pressure debugging, loses automatic balance function and stability and reliability, thereby easily produces security incident.
Summary of the invention
The purpose of this utility model provides a kind of leading type double-piston High Pressure Difference reduction valve, overcome the shortcoming that above-mentioned leading type piston reduction valve diaphragm cannot stand impacting with high pressure and can be out of shape, solve pressure〉the security and stability problem of reduction valve under the 6.4Mpa, the technological scheme that its technical problem that solves the utility model adopts is: leading type double-piston High Pressure Difference reduction valve of the present utility model, identical with other structures of known leading type piston reduction valve, also be to comprise main valve and pilot valve two-part, difference is, the utility model is set up a small piston, replace the diaphragm of the pilot valve of known leading type piston reduction valve with small piston, known leading type piston reduction valve is improved to leading type double-piston High Pressure Difference reduction valve.
The utility model and original technology compare: the utility model has been done great improvement on the basis of known leading type piston reduction valve, adopt small piston to substitute diaphragm, make this high-pressure pressure-reducing valve can bear the High Pressure Difference pressure of pressure 〉=6.4Mpa, and can not be out of shape, can also guarantee stabilization of export pressure, reach stable pressure-reducing function, therefore valve downstream pressure or downstream meet trickle variation and can both promptly and accurately feed back to main valve piston, regulate the aperture of main valve, guarantee the stable of downstream pressure.
Description of drawings
Fig. 1 is the generalized section of known leading type piston structure of relief pressure valve.
Fig. 2 is a kind of generalized section of the utility model structure.
Numeral among the figure:
1--plug screw 2--bottom flange 3--valve body 4--main spool spring 5-main valve stem 6--main valve seat
The big cylinder sleeve 10--of 7--base plate 8--big piston 9--big piston sealing 11--bonnet 12--pilot valve spring
13--pilot stem 14--guide valve seat 16--spring shield 17--Regulation spring 18--protective housing
19--adjusting screw 20--spring seat 21-small piston 22-little cylinder sleeve 23--small piston seal ring
Embodiment
Below specific embodiment by accompanying drawing, the utility model is further specified.(but not being) to restriction of the present utility model.
As shown in Figure 2, it is a kind of generalized section of leading type double-piston High Pressure Difference structure of relief pressure valve of the present utility model, also be to comprise main valve and pilot valve two-part, other structures are identical with the structure of known leading type piston reduction valve shown in Figure 1, difference is, the utility model has been set up a small piston, with the diaphragm 15 on the pilot valve of the known as shown in Figure 1 leading type piston reduction valve of small piston 21 replacements.
As shown in Figure 2, described leading type double-piston High Pressure Difference reduction valve is provided with small piston 21, small piston is arranged in little cylinder sleeve 22 cylinder bodies on the pilot valve, replace the diaphragm 15 on the pilot valve of known leading type piston reduction valve, the bottom of small piston heads into the valve rod 13 of pilot valve, the head of small piston 21 is inserted in Regulation spring 17 lower ends, and be inserted in spring seat 20 lower ends Regulation spring 17 upper ends, and adjusting screw 19 lower ends of pilot valve head in the groove of spring seat 20 upper ends.
The edge of described small piston 21 can be provided with small piston seal ring 23.
Working principle of the present utility model: as shown in Figure 2, turn adjusting screw 19, back down pilot stem 13, medium enters big piston 8 tops from suction side, because big piston 8 areas are greater than main valve stem 5 areas, promoting big piston 8 moves down, main valve stem 5 is opened,, thereby changed the pressure of big piston 8 tops by the aperture of the pressure change pilot stem 13 of downstream pressure balance adjustment spring 17, the aperture of control main valve stem 5 makes the pressure of outlet keep constant.Even outlet line is closed, can guarantee that also outlet pressure is controlled at the safety pressure scope, guarantee the safety of outlet line.Set outlet pressure by adjusting screw 19, utilize small piston 21 sensing outlet pressures to change, open and close, drive big piston 8, regulate the size of main valve throttling position area of passage, realize the decompression voltage stabilizing function by pilot valve.
More than be specific embodiment of the utility model, all similar changes of doing according to above-mentioned design ought to belong to scope of the present utility model.
Claims (2)
1, leading type double-piston High Pressure Difference reduction valve, comprise pilot valve and main valve two-part, it is characterized in that, described leading type double-piston High Pressure Difference reduction valve is provided with small piston, small piston is arranged in the little cylinder sleeve cylinder body on the pilot valve, replace the diaphragm on the pilot valve of known leading type piston reduction valve, the bottom of small piston heads into the valve rod of pilot valve, the head of small piston is inserted in the Regulation spring lower end, be inserted in the spring seat lower end Regulation spring upper end, and the adjusting screw lower end of pilot valve heads in the groove of spring seat upper end.
2, leading type double-piston High Pressure Difference reduction valve according to claim 1 is characterized in that the edge of described small piston is provided with the small piston seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201029365U CN201212575Y (en) | 2008-07-09 | 2008-07-09 | Pilot double-piston high differential pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201029365U CN201212575Y (en) | 2008-07-09 | 2008-07-09 | Pilot double-piston high differential pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201212575Y true CN201212575Y (en) | 2009-03-25 |
Family
ID=40496748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201029365U Expired - Fee Related CN201212575Y (en) | 2008-07-09 | 2008-07-09 | Pilot double-piston high differential pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201212575Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102428307A (en) * | 2009-05-19 | 2012-04-25 | 格雷索明尼苏达有限公司 | Pneumatically Actuated Pilot Valve |
| CN102853155A (en) * | 2012-08-30 | 2013-01-02 | 杭州春江阀门有限公司 | Adjustable pressure reducing valve with high pressure reducing ratio |
| CN103062465A (en) * | 2011-10-18 | 2013-04-24 | 大金工业株式会社 | Pressure adjusting screw mechanism and pressure control valve |
| CN103672075A (en) * | 2013-12-25 | 2014-03-26 | 特瑞斯信力（北京）流体科技有限公司 | Novel ultrahigh voltage regulator |
| CN105240579A (en) * | 2015-11-03 | 2016-01-13 | 捷锐企业(上海)有限公司 | Welded diaphragm type decompressor with high pressure stability |
| CN107355551A (en) * | 2017-08-29 | 2017-11-17 | 四川固特阀门制造有限公司 | Inverse formula opens and closes cut-out cock |
-
2008
- 2008-07-09 CN CNU2008201029365U patent/CN201212575Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102428307A (en) * | 2009-05-19 | 2012-04-25 | 格雷索明尼苏达有限公司 | Pneumatically Actuated Pilot Valve |
| CN102428307B (en) * | 2009-05-19 | 2015-01-14 | 格雷索明尼苏达有限公司 | Pneumatically Actuated Pilot Valve |
| CN103062465A (en) * | 2011-10-18 | 2013-04-24 | 大金工业株式会社 | Pressure adjusting screw mechanism and pressure control valve |
| CN103062465B (en) * | 2011-10-18 | 2015-05-06 | 大金工业株式会社 | Pressure adjusting screw mechanism and pressure control valve |
| CN102853155A (en) * | 2012-08-30 | 2013-01-02 | 杭州春江阀门有限公司 | Adjustable pressure reducing valve with high pressure reducing ratio |
| CN102853155B (en) * | 2012-08-30 | 2013-11-27 | 杭州春江阀门有限公司 | Adjustable pressure reducing valve with high pressure reducing ratio |
| CN103672075A (en) * | 2013-12-25 | 2014-03-26 | 特瑞斯信力（北京）流体科技有限公司 | Novel ultrahigh voltage regulator |
| CN105240579A (en) * | 2015-11-03 | 2016-01-13 | 捷锐企业(上海)有限公司 | Welded diaphragm type decompressor with high pressure stability |
| CN107355551A (en) * | 2017-08-29 | 2017-11-17 | 四川固特阀门制造有限公司 | Inverse formula opens and closes cut-out cock |
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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: 20090325 Termination date: 20110709 |