CN2231749Y - High-vacuum diaphragm valve - Google Patents
High-vacuum diaphragm valve Download PDFInfo
- Publication number
- CN2231749Y CN2231749Y CN 95213952 CN95213952U CN2231749Y CN 2231749 Y CN2231749 Y CN 2231749Y CN 95213952 CN95213952 CN 95213952 CN 95213952 U CN95213952 U CN 95213952U CN 2231749 Y CN2231749 Y CN 2231749Y
- Authority
- CN
- China
- Prior art keywords
- valve
- diaphragm
- spool
- rod
- membrane
- 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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- Details Of Valves (AREA)
Abstract
The utility model relates to a high-vacuum diaphragm valve usinf diaphragms as the sealing element. The valve cover of the high-vacuum diaphragm valve is provided with a guide groove, a valve core is provided with a guide bar, a switch has the indicating signals to make the operation easy, the valve core is also provided with a T-shaped groove, the diaphragm is easy to assembly and disassembly, the pressing end surface of the valve bar is provided with a steel ball, the closing is easy by using the point contacting, the curvature radius of the diaphragm is enlarged to enlarge the sealing face and the intensity of the diaphragm, and the leakage rate is reduced. The high-vacuum diaphragm valve has the advantages of good tightness, little leakage rate, long service life, etc. The utility model is especially suitable for using on the lithium bromide refrigerating battery.
Description
The utility model relates to a kind of high vacuum membrane valve of making Sealing with diaphragm.
There is following major defect at present relevant high vacuum membrane valve: diaphragm must be installed and removed very difficult from the spool base apertures, and the diaphragm head is twisted into two parts the working life that influences diaphragm easily simultaneously; This valve is provided with and opens and closes the position indication, and the operator is difficult to know that valve state of living in is to close or open, therefore misoperation easily, the fragile diaphragm of tension; The radius of curvature of diaphragm is too little, so diaphragm seal face and intensity are also little.Cause the diaphragm leak rate big, poor reliability, so it can not keep the condition of high vacuum degree of system for a long time.
The purpose of this utility model is that a kind of good seal performance will be provided, and leak rate is little, the high vacuum membrane valve of long service life.
The purpose of this utility model is achieved in that this membrane valve comprises a valve body, which is provided with a valve plate, also connects a valve gap on this valve body, is provided with the valve rod of a band handwheel in described valve gap central authorities, and valve rod can vertically move up and down; One diaphragm which is provided with a diaphragm head, and the inboard of this diaphragm is provided with a dome; One spool is positioned at the top of valve plate, and is connected between valve body and the valve gap, is provided with a T-slot hole on the top of described spool, also is provided with a hole in this spool bottom; The end of described valve rod is arranged in the described slotted eye in spool top, described diaphragm head is arranged in the hole of described spool bottom, it is characterized in that it also comprises the guiding groove that is located on the described valve gap and is located at the guide rod that also can do the switch indication on the described spool, described guide rod can move up and down along guiding groove; On described spool, have a T-slot that diaphragm is pushed; On described valve rod end face, be provided with a steel ball; The radius of curvature of described diaphragm dome has increased 5-6 doubly than original radius of curvature.
The utility model has overcome the shortcoming that exists in the prior art: valve gap and spool are provided with guiding groove and guide rod, and this valve has had index signal when switch, therefore easy to operately can not damage diaphragm because of overtorquing; Spool has a T groove; Diaphragm is easy to loading and unloading, and the valve rod end face is provided with steel ball, the some contact, and valve is light when closing, and can not damage the diaphragm head; The diaphragm radius of curvature increases, and sealing surface and intensity also strengthen thereupon, and the diaphragm seal degree is good, and leak rate is that 0.5 times of original leak rate is less than for a short time, so this membrane valve can keep the condition of high vacuum degree of system for a long time.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is a sectional drawing of the present utility model.
Describe structure in detail below in conjunction with Fig. 1 according to the concrete membrane valve that the utility model proposes.
This vacuum diaphragm valve comprises a valve body 1, which is provided with a valve plate 10, connects a valve gap 2 on this valve body 1, is provided with the valve rod 5 of a band handwheel in valve gap 2 central authorities, and this valve rod 5 can vertically move up and down; One diaphragm 4 which is provided with a diaphragm head 4-1, and the inboard of this diaphragm is provided with a dome 4-2; One spool 3, be positioned at the top of valve plate 10, and be connected between valve body 1 and the valve gap 2, be provided with a T-slot hole 3-1 on the top of spool 3, also be provided with a hole (not shown) in the spool bottom, the end of described valve rod is arranged in the top slotted eye 3-1 of spool, and described diaphragm head is arranged in the hole of described spool bottom; Between valve rod end and diaphragm head, also be provided with a pad 9; It also comprises described membrane valve the guiding groove 11 that is located at bonnet lower and is located at the guide rod 8 of the switch the done indication on the spool, and described guide rod can move up and down along guiding groove, and this guide rod 8 can adopt other rod-like element of for example screw, nail etc. to constitute; On described spool, have a T-slot hole 4-2 that the diaphragm head is pushed, thereby make diaphragm easy to loading and unloading, overcome original diaphragm head and from the spool base apertures, installed and removed the shortcoming of difficulty, thereby therefore the possibility of having avoided twisting into two parts the diaphragm head has guaranteed the damage of diaphragm head; On described valve rod end face, have a curve bath, be provided with a steel ball 6 in the groove, thereby when valve rod 5 ends are compressed, change a contact into by the face contact, reduce the friction of valve rod when descending, and light when valve is closed, can not damage diaphragm again simultaneously because of friction is excessive; The original radius of curvature of radius ratio of described diaphragm dome 4-2 has increased 5-6 doubly, thereby the sealing surface of diaphragm 4 and intensity are increased greatly, has improved the sealability of diaphragm 4, and the leak rate that makes diaphragm is from original≤2.7 * 10
-4PaL/S is reduced to≤and 1.3 * 10
-7Pal/s, so this valve can keep the high vacuum of system for a long time.
Claims (4)
1. a high vacuum membrane valve comprises a valve body, which is provided with a valve plate, also connects a valve gap on this valve body, is provided with the valve rod of a band handwheel in described valve gap central authorities, and valve rod can vertically move up and down; One diaphragm which is provided with a diaphragm head, and the inboard of this diaphragm is provided with a dome; One spool is positioned at the top of valve plate, and is connected between valve body and the valve gap, is provided with a T-slot hole on the top of described spool, also is provided with a hole in this spool bottom; The end of described valve rod is arranged in the described slotted eye in spool top, described diaphragm head is arranged in the hole of described spool bottom, it is characterized in that it also comprises the guiding groove that is located on the described valve gap and is located at the guide rod that also can do the switch indication on the described spool, described guide rod can move up and down along guiding groove; On described spool, have a T-slot that diaphragm is pushed; On described valve rod end face, be provided with a steel ball; The radius of curvature of described diaphragm dome has increased 5-6 doubly than original radius of curvature.
2. membrane valve according to claim 1 is characterized in that having a curve bath on the end face of described valve rod.
3. membrane valve according to claim 1 and 2 is characterized in that described steel ball is located in the described curve bath.
4. membrane valve according to claim 1 is characterized in that described guide rod is by screw, or other rod-like element constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95213952 CN2231749Y (en) | 1995-05-31 | 1995-05-31 | High-vacuum diaphragm valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95213952 CN2231749Y (en) | 1995-05-31 | 1995-05-31 | High-vacuum diaphragm valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2231749Y true CN2231749Y (en) | 1996-07-24 |
Family
ID=33863701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95213952 Expired - Fee Related CN2231749Y (en) | 1995-05-31 | 1995-05-31 | High-vacuum diaphragm valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2231749Y (en) |
-
1995
- 1995-05-31 CN CN 95213952 patent/CN2231749Y/en not_active Expired - Fee Related
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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 |