CN2753931Y - Thin-film pressure-reducing valve - Google Patents
Thin-film pressure-reducing valve Download PDFInfo
- Publication number
- CN2753931Y CN2753931Y CN 200420118573 CN200420118573U CN2753931Y CN 2753931 Y CN2753931 Y CN 2753931Y CN 200420118573 CN200420118573 CN 200420118573 CN 200420118573 U CN200420118573 U CN 200420118573U CN 2753931 Y CN2753931 Y CN 2753931Y
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- valve
- diaphragm
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- pressure
- spool
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Abstract
The utility model relates to a thin-film pressure-reducing valve, which comprises a hand wheel (1), an upper spring (2), an upper valve body (3), a diaphragm (4), a lower valve body (5) and a lower spring (6). The utility model is characterized in that a cone valve core (7) is arranged beneath the diaphragm (4); the cone valve core (7) is arranged inside a valve seat (9); the valve seat (9) is integrated with the lower valve body (5). The structure enables the pressure-reducing valve to have the function of pressure stabilization. The accuracy of pressure stabilization of the utility model can reach the value which is not more than 10 percent, when the diaphragm has the diameter which is 80 mm to 100 mm and the valve core has the stroke which is 4 mm to 6 mm.
Description
Technical field
The utility model relates to a kind of reduction valve, particularly Diaphragm reducing valve.
Background technique
Reduction valve is the industrial parts of often using.Common Diaphragm reducing valve (seeing accompanying drawing 1) is general main to be made up of handwheel, upper spring, lower spring, upper valve body, following valve body, diaphragm, spool, actuating rod, nozzle, diaphragm wherein plays the effect of spacer medium, decompression member is a spool, just can reach the purpose of decompression by the gap between handwheel regulating spool, the nozzle.Though this Diaphragm reducing valve has pressure-reducing function, when fluctuation took place inlet pressure, outlet pressure can not have voltage stabilizing function substantially along with significant change yet but in actual applications.
The content of model utility
The purpose of this utility model provides a kind of Diaphragm reducing valve with voltage stabilizing function.
Diaphragm reducing valve of the present utility model mainly is made up of handwheel, upper spring, upper valve body, diaphragm, following valve body, lower spring, spool, valve seat, it is characterized in that spool is a taper valve core.
In the prior art (accompanying drawing 1), when backspin handwheel 1, upper spring 2 stressed compressing diaphragms 4 make actuating rod 10 move down and drive spool 7 and move down, and produce the gap between nozzle 11 and the spool 7, and the gap decompression of medium between nozzle and spool flowed out.Therefore, just can regulate the pressure height of outlet by up-down adjustment handwheel 1.But there is the shortcoming that stroke is little, Flow characteristics is bad in above-mentioned pressure reduction structure.In the utility model, in order to strengthen the voltage regulation performance of pressure maintaining valve, the diameter of diaphragm (area) is greater than the diaphragm diameter in the Diaphragm reducing valve of selling in the market, and diaphragm increases, corresponding spool stroke will increase, therefore, and existing its requirement of spool stroke incompatibility.Adopt taper valve core to substitute existing pressure reduction structure in the utility model, realize decompression, not only can satisfy the requirement of stroke, can also satisfy Flow characteristics of the present utility model by the gap between taper valve core and the valve seat.
In theory, the big more pressure-sensitive performance of the diaphragm area of Diaphragm reducing valve is good more, and sensitivity is high more, and the effect of voltage stabilizing is also good more.In the utility model diaphragm diameter is decided to be 80-100mm (the diaphragm diameter 34mm of prior art), experiment finds that diameter is too poor less than the 80mm voltage regulation result; And sustain damage too greatly because of pressure-sensitive easily greater than the 100mm diaphragm, best diaphragm diameter is 90mm.Diaphragm diameter increases, and requires the also corresponding increase of spool stroke, and spool stroke of the present utility model is made as 4-6mm (spool stroke of prior art is at 2-3mm), if stroke less than 4mm then the voltage regulation result of diaphragm can not manifest; Then exceeded the telescopic amplitude of diaphragm greater than 6mm, best spool stroke is 5mm.
The diaphragm that the utility model adopts does not have special requirement on material, but for to make the high temperature of reduction valve ability more than 300 ℃, enlarges its application, can adopt stainless steel.
In addition, the utility model also can be provided with safety valve in the outlet port of pressure maintaining valve, and its effect is when back pressure is out of control, can protect rear portion equipment, device not to be damaged when (corroding as spool) for a certain reason.
The utility model strengthens the pressure-sensitive performance of reduction valve by the increase of diaphragm area, realizes voltage regulation performance preferably, and the precision of voltage regulation can control in 10%.
Description of drawings
Fig. 1 Diaphragm reducing valve structural drawing of the prior art
Fig. 2 Diaphragm reducing valve structural drawing of the present utility model
Embodiment
In conjunction with Fig. 2, the diaphragm type decompression venting valve is made up of handwheel 1, upper spring 2, upper valve body 3, diaphragm 4, following valve body 5, lower spring 6, spool 7, safety valve 8, valve seat 9.Accompany diaphragm 4 between upper valve body 3 and the following valve body 5; Handwheel 1 is positioned at the top of upper valve body 3, and its hand wheel pole gos deep in the upper valve body 3, and acts directly on the upper end of upper spring 2, can regulate the suppressed range of upper spring 2 by handwheel 1 motion; The lower end of upper spring 2 and diaphragm 4 effects; There is a taper valve core 7 below of diaphragm 4, and taper valve core 7 places in the valve seat 9, and valve seat 9 forms integral structure with following valve body 5; Spool has lower spring 67 times; Safety valve 8 is positioned at the down bottom of valve body 5, and is connected with outlet line in the following valve body 5.
Concrete working procedure is to regulate the handwheel 1 of diaphragm type decompression venting valve, makes the gap of valve seat 9 and spool 7 suitable; During the inlet incoming pressure, the hypotensive effect owing to gap between spool 7, the valve seat 9 makes outlet pressure be starkly lower than inlet pressure; When inlet pressure fluctuates, when pressure increases, the pressure of experiencing on the diaphragm 4 increases, move on the diaphragm 4, the effect lower valve core 7 of lower spring 6 with on move, then the gap of 7 of valve seat 9 and spools dwindles, increase falls in pressure herein, offset the inlet increased pressure, made the pressure of outlet constant substantially; Otherwise if inlet pressure reduces, then spool 7 moves down, and the gap that spool 7, valve seat are 9 increases, and pressure herein falls and reduces, and has offset the pressure that inlet reduces, and also can make the pressure of outlet constant substantially.
If spool occurring is corroded, when decompression venting valve did not play decompression, entry and exit pressure was suitable, and then this moment, safety valve 8 was opened pressure release (cracking pressure of this safety valve can artificially be set) automatically, and outlet can be remained under the lower pressure.
The decompression and the voltage stabilizing test result that adopt reduction valve of the present utility model to carry out in the laboratory see the following form.
| Diaphragm diameter (mm) | Spool stroke (mm) | Inlet pressure (MPa) | Outlet pressure (MPa) | The precision of voltage regulation (%) * | |
| Implement reference example 1 | 90 | 5 | 1.0 | 0.2 | - |
| Example 1 | 90 | 5 | 1.1 | 0.205 | 5％ |
| Example 2 | 90 | 5 | 0.9 | 0.192 | 8％ |
| Contrast reference example 1 | 34 | 3 | 1.0 | 0.2 | - |
| Comparative Examples 1 | 34 | 3 | 1.1 | 0.28 | 80％ |
| Comparative Examples 2 | 34 | 3 | 0.9 | 0.13 | 70％ |
* the pressure surge amplitude of the precision of voltage regulation=outlet is divided by the pressure surge amplitude of inlet
Claims (5)
1. a Diaphragm reducing valve comprises handwheel (1), upper spring (2), upper valve body (3), diaphragm (4), following valve body (5), lower spring (6); Accompany diaphragm (4) between upper valve body (3) and the following valve body (5); Handwheel (1) is positioned at the top of upper valve body (3), and its hand wheel pole gos deep into acting directly on the upper end of upper spring (2) in the upper valve body (3); The lower end of upper spring (2) and diaphragm (4) effect is characterized in that there is a taper valve core (7) below of diaphragm (4), and taper valve core (7) places in the valve seat (9), and valve seat (9) forms integral structure with following valve body (5); Lower spring (6) is arranged under the spool (7).
2. reduction valve according to claim 1, the diameter that it is characterized in that diaphragm (4) is 80-100mm, the stroke of spool (7) is 4-6mm.
3. reduction valve according to claim 2, the diameter that it is characterized in that diaphragm (4) is 90mm, the stroke of spool (7) is 5mm.
4. reduction valve according to claim 3 is characterized in that safety valve (8) is positioned at the down bottom of valve body (5), and is connected with outlet line in the following valve body (5).
5. the reduction valve one of described according to claim 1 to 4 is characterized in that diaphragm (4) is a stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420118573 CN2753931Y (en) | 2004-10-14 | 2004-10-14 | Thin-film pressure-reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420118573 CN2753931Y (en) | 2004-10-14 | 2004-10-14 | Thin-film pressure-reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2753931Y true CN2753931Y (en) | 2006-01-25 |
Family
ID=35926040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420118573 Expired - Lifetime CN2753931Y (en) | 2004-10-14 | 2004-10-14 | Thin-film pressure-reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2753931Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201130B (en) * | 2007-11-23 | 2011-03-30 | 深圳市兆福源科技有限公司 | Valve structure capable of bidirectional automatic control |
| WO2012100473A1 (en) * | 2011-01-27 | 2012-08-02 | 重庆山外山科技有限公司 | Self-resetting pressure reducing valve for hemodialysis |
-
2004
- 2004-10-14 CN CN 200420118573 patent/CN2753931Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201130B (en) * | 2007-11-23 | 2011-03-30 | 深圳市兆福源科技有限公司 | Valve structure capable of bidirectional automatic control |
| WO2012100473A1 (en) * | 2011-01-27 | 2012-08-02 | 重庆山外山科技有限公司 | Self-resetting pressure reducing valve for hemodialysis |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141014 Granted publication date: 20060125 |