CN201521658U - Pneumatic membrane control valve - Google Patents
Pneumatic membrane control valve Download PDFInfo
- Publication number
- CN201521658U CN201521658U CN2009202569736U CN200920256973U CN201521658U CN 201521658 U CN201521658 U CN 201521658U CN 2009202569736 U CN2009202569736 U CN 2009202569736U CN 200920256973 U CN200920256973 U CN 200920256973U CN 201521658 U CN201521658 U CN 201521658U
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- CN
- China
- Prior art keywords
- valve
- adjusting sleeve
- spool
- adjustment sleeve
- control valve
- 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 - Lifetime
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Abstract
The utility model relates to a control valve, which is a pneumatic membrane control valve. The pneumatic membrane control valve comprises a valve body, a valve core, a valve cover, an adjusting sleeve, a valve seat, a valve rod and a pneumatic membrane actuator, wherein the valve seat and the adjusting sleeve are installed inside a middle cavity of the valve body; the valve rod and the valve core are connected through a cylindrical pin part, assembled with the valve cover into a part and installed inside the adjusting sleeve; the adjusting sleeve is pressed by the valve cover and the valve body which are assembled and tightly screwed through a screw stud and a nut; and the top of the valve rod is connected with the pneumatic membrane actuator through shafts to form a whole body. Besides, the valve core is a martensite stainless steel valve core; the adjusting sleeve is an austenite stainless steel adjusting sleeve; and nickel-phosphorus plating treatment is conducted on the surface of the valve core. The pneumatic membrane control valve with simple structure is capable of preventing the valve core and the adjusting sleeve from being jammed, ensuring anti-corrosion performance of the valve core as the valve core and the adjusting sleeve select different materials, ensuring the overall use performance of the valve, decreasing failure rate of the valve and prolonging the service life of the valve.
Description
Technical field
The utility model relates to a kind of modulating valve, a kind of specifically pneumatic diaphragm control valve.
Background technique
The pneumatic diaphragm control valve Applicable media is the high pressure steam under 425 ℃, regulates rate-of flow and plays certain decompression.Existing pneumatic diaphragm control valve, its valve spool top hot soak condition, adjustment sleeve then are that partly or indirectly (during valve closing) contacts with high temperature, so the heating degree of spool and adjustment sleeve is different, because of the thermal expansion coefficients that heat rose also different.Existing pneumatic diaphragm control valve spool and adjustment sleeve are same materials, existing spool and adjustment sleeve material such as following table:
Table 1
Different because of the temperature of bearing, the speed of its heat expansion is also different, so cause spool and adjustment sleeve stuck easily, makes the valve can't proper functioning.
Summary of the invention
Technical problem to be solved in the utility model is: at the shortcoming of above prior art existence, propose a kind of pneumatic diaphragm control valve, the material of spool and adjustment sleeve is formed the application pairing, and is simple in structure, can prevent that spool and adjustment sleeve are stuck, reduce the failsafe valve rate.
The technological scheme that the utility model solves above technical problem is:
Pneumatic diaphragm control valve, comprise valve body, spool, valve gap, adjustment sleeve, valve seat, valve rod and air bladder final controlling element, valve seat and adjustment sleeve are contained in the lumen of part valve body, valve rod is connected by the cylinder pin member with spool and is assembled into parts with valve gap, be contained in the adjustment sleeve, valve gap and valve body assembling are also pushed down adjustment sleeve, are screwed with nut by double-screw bolt to be connected, the valve rod top is connected with air bladder final controlling element axle by screw thread, forms a whole.
4～20mA electrical signal that air bladder final controlling element drive valve rod spare and spool root a tree name working condition requirement feed, move up and down, spool makes valve opening, closes, can make simultaneously spool upwardly open height size regulate medium by the numerous pod apertures of adjustment sleeve outer wall how much regulate the rate-of flow size, finish the mission of modulating valve.
Between valve body and the valve seat, all be provided with pad between valve gap and the valve seat.Spool is the Martensitic Stain Less Steel spool.Adjustment sleeve is the Austenitic Stainless Steel adjustment sleeve.Spool face nickel plating phosphorus is handled.
The utility model is simple in structure, can prevent that spool and adjustment sleeve are stuck, and spool is selected different materials for use with adjustment sleeve, has guaranteed the Corrosion Protection of spool, guarantees the whole usability of valve, reduces the failsafe valve rate, has improved valve working life.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Embodiment one
The structure of present embodiment as shown in Figure 1, a kind of pneumatic diaphragm control valve, comprise valve body 1, spool 5, valve gap 8, adjustment sleeve 4, valve seat 3, valve rod 11 and air bladder final controlling element 24, valve seat 3 and adjustment sleeve 4 are contained in the lumen of part valve body 1, valve rod 11 is connected by the cylinder pin member with spool 5 and is assembled into parts with valve gap 8, be contained in the adjustment sleeve 4, valve gap 8 is with valve body 1 assembling and push down adjustment sleeve 4, screw with nut 13 by double-screw bolt 12 and to be connected, valve rod 11 tops are connected by 24 of screw thread and air bladder final controlling element, form a whole.Drive 4～20mA electrical signal that valve rods 11 and 5 a tree name working condition requirements of spool feed by air bladder final controlling element 24, move up and down, spool 5 makes valve opening, closes (spool 5 conical surfaces and valve seat 3 endoporus closures when closing), can make simultaneously spool 5 upwardly open height size regulate medium by the numerous pod apertures of adjustment sleeve 4 outer walls how much regulate the rate-of flow size, finish the mission of modulating valve.
The utility model is simple in structure, can prevent that spool 5 and adjustment sleeve 4 are stuck, and spool 5 is selected different materials for use with adjustment sleeve 4, spool 5 of the present utility model and adjustment sleeve 4 materials such as following table:
Table 2
Guarantee the Corrosion Protection of spool, guaranteed the whole usability of valve, reduced the failsafe valve rate, improved valve working life.
The utility model can also have other mode of execution, and the technological scheme that equal replacement of all employings or equivalent transformation form all drops within the claimed scope of the utility model.
Claims (5)
1. pneumatic diaphragm control valve is characterized in that: comprise valve body, spool, valve gap, adjustment sleeve, valve seat, valve rod and air bladder final controlling element; Described valve seat and adjustment sleeve are contained in the lumen of part valve body; Described valve rod is connected by the cylinder pin member with spool and is assembled into parts with valve gap, is contained in the adjustment sleeve; Described valve gap and valve body assembling are also pushed down adjustment sleeve, are screwed with nut by double-screw bolt to be connected; Described valve rod top is connected with air bladder final controlling element axle by screw thread, forms a whole.
2. pneumatic diaphragm control valve as claimed in claim 1 is characterized in that: between described valve body and the valve seat, all be provided with pad between valve gap and the valve seat.
3. pneumatic diaphragm control valve as claimed in claim 1 is characterized in that: described spool is the Martensitic Stain Less Steel spool.
4. pneumatic diaphragm control valve as claimed in claim 1 is characterized in that: described adjustment sleeve is the Austenitic Stainless Steel adjustment sleeve.
5. pneumatic diaphragm control valve as claimed in claim 1 is characterized in that: described spool face is coated with nickel and phosphorus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202569736U CN201521658U (en) | 2009-11-12 | 2009-11-12 | Pneumatic membrane control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202569736U CN201521658U (en) | 2009-11-12 | 2009-11-12 | Pneumatic membrane control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201521658U true CN201521658U (en) | 2010-07-07 |
Family
ID=42507834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202569736U Expired - Lifetime CN201521658U (en) | 2009-11-12 | 2009-11-12 | Pneumatic membrane control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201521658U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278504A (en) * | 2011-06-27 | 2011-12-14 | 上海阀门厂有限公司 | Atmosphere discharge valve |
| CN105736807A (en) * | 2016-03-16 | 2016-07-06 | 杭州艾诺流体控制仪表有限公司 | Output-force-adjustable pneumatic diaphragm regulating valve |
-
2009
- 2009-11-12 CN CN2009202569736U patent/CN201521658U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278504A (en) * | 2011-06-27 | 2011-12-14 | 上海阀门厂有限公司 | Atmosphere discharge valve |
| CN105736807A (en) * | 2016-03-16 | 2016-07-06 | 杭州艾诺流体控制仪表有限公司 | Output-force-adjustable pneumatic diaphragm regulating valve |
| CN105736807B (en) * | 2016-03-16 | 2018-05-22 | 杭州艾诺流体控制仪表有限公司 | Power output is adjustable pneumatic diaphragm control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100707 |