CN2257569Y - Film pump - Google Patents
Film pump Download PDFInfo
- Publication number
- CN2257569Y CN2257569Y CN 96211924 CN96211924U CN2257569Y CN 2257569 Y CN2257569 Y CN 2257569Y CN 96211924 CN96211924 CN 96211924 CN 96211924 U CN96211924 U CN 96211924U CN 2257569 Y CN2257569 Y CN 2257569Y
- Authority
- CN
- China
- Prior art keywords
- pump
- film
- valve block
- air outlet
- air
- 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
Links
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model relates to a film sucking pump having large pressure difference and small flow. A main shaft of a motor of the film pump is connected with an eccentric wheel which is fixedly connected with a swing stem and a vibrating film which is arranged in an air chamber, and valve sheets are covered on an air inlet and an air outlet of a valve body. The utility model is characterized in that valve sheet supports are arranged on the air inlet and the air outlet. The valve plate supports are used for reducing the vibrating amplitude of the vibrating film, increasing the tightness of the air chamber and enhancing the sucking pressure difference of the pump. The film pump can be widely applied to air sampling systems having large pressure difference and small flow, and since the pump has small volume, the utility model is especially suitable for the design of portable instruments.
Description
The utility model relates to the film extraction pump of a kind of big pressure reduction, small flow.
Small flow film extraction pump is widely used at instrument field, its main structure is that motor is fixed on the support, electric machine main shaft drives fork and diaphragm by eccentric wheel, the to-and-fro motion of diaphragm causes the variation repeatedly of air chamber internal air pressure, valve block is a flexible sheet, and is multiple on the inlet hole and air outlet hole of valve body, along with the lifting repeatedly of the air pressure in the air chamber, valve block is opened respectively and is stopped up into and out of pore, reaches the purpose of intake-gas.Existing extraction pump valve block adopts silicon rubber film more, and during the lifting of air chamber internal air pressure, the folding amplitude of valve block is bigger.Influenced the speed of stomatal closure, also made the tightness index of extraction pump lower, the pressure reduction of bleeding is difficult to improve.
For overcoming the above-mentioned defective of prior art, invention task of the present utility model is to improve existing film pump structure, and the tightness index when improving its work strengthens operating pressure differential and makes its more reasonable structure, volume smaller and more exquisite.
The scheme of finishing task of the present invention is as follows: electric machine main shaft same as the prior art and eccentric wheel connect, eccentric wheel and fork, diaphragm fixed connection.Diaphragm is installed in the air chamber.Valve block covers on the inlet hole and air outlet hole of valve body.Feature of the present utility model is: be provided with the valve block holder at inlet hole and air outlet hole.Said valve block holder can be to put a fixed rigidity limiting stopper in the hole on one side that valve block is opened admittedly.Also can be a projection in the hole, a bounding means such as screw.Increase after the valve block holder of spacing usefulness, amplitude reduces during the valve block folding, has dwindled actuation time, and the tightness when manhole appendix is closed improves, and membrane pump compact overall structure, pressure reduction increase, volume-diminished, are more suitable for instrument field and use.
Now be described further with embodiment in conjunction with the accompanying drawings:
Fig. 1 is the membrane pump structural representation;
Fig. 2 is a valve block holder structure schematic representation
Fig. 3 is the side view of Fig. 2
Embodiment 1, and with reference to Fig. 1: motor 2 is fixed on the support 1, and diaphragm 9 is installed in the air chamber 3, is fixed on the fork 10 by compressing tablet 8, and connects with electric machine main shaft by fork 10 and eccentric wheel 6.Valve block 5 is placed between the valve body 4,7, offers inlet hole 11 and air outlet hole 12 on the valve body respectively.With reference to Fig. 2, Fig. 3: inlet hole one side that air outlet hole 12 1 sides are provided with valve block holder 13. valve bodies 7 on valve body 4 is provided with same valve block holder (not drawing among the figure), and promptly into and out of the valve block holder of pore, it is opposite that direction is set.
Claims (3)
1. membrane pump, electric machine main shaft and eccentric wheel connect, and eccentric wheel and fork, diaphragm is fixing joins
Knot, diaphragm are installed in the air chamber, valve block covers on the inlet hole and air outlet hole of valve body, its
Feature is: inlet hole and air outlet hole are provided with the valve block holder.
2. according to the described membrane pump of claim 1, it is characterized in that: said valve block holder be inlet hole and
A rigidity limiting stopper in the air outlet hole.
3. according to the described membrane pump of claim 2, it is characterized in that: the valve block holder of inlet hole and air outlet hole
It is opposite that direction is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96211924 CN2257569Y (en) | 1996-05-21 | 1996-05-21 | Film pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96211924 CN2257569Y (en) | 1996-05-21 | 1996-05-21 | Film pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2257569Y true CN2257569Y (en) | 1997-07-09 |
Family
ID=33894734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96211924 Expired - Fee Related CN2257569Y (en) | 1996-05-21 | 1996-05-21 | Film pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2257569Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710035B (en) * | 2009-11-19 | 2012-09-05 | 武汉市天虹仪表有限责任公司 | Smoke dust sampling instrument |
| CN107532583A (en) * | 2015-04-27 | 2018-01-02 | 理想工业公司 | Personal air sampling pump group part |
| CN109619772A (en) * | 2018-10-31 | 2019-04-16 | 立兆股份有限公司 | With pumping/aerification function slider of slide fastener |
-
1996
- 1996-05-21 CN CN 96211924 patent/CN2257569Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710035B (en) * | 2009-11-19 | 2012-09-05 | 武汉市天虹仪表有限责任公司 | Smoke dust sampling instrument |
| CN107532583A (en) * | 2015-04-27 | 2018-01-02 | 理想工业公司 | Personal air sampling pump group part |
| CN107532583B (en) * | 2015-04-27 | 2020-04-17 | 理想工业公司 | Personal air sampling pump assembly |
| CN109619772A (en) * | 2018-10-31 | 2019-04-16 | 立兆股份有限公司 | With pumping/aerification function slider of slide fastener |
| CN109619772B (en) * | 2018-10-31 | 2021-10-08 | 立兆股份有限公司 | Zipper piece with air pumping/inflating function |
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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 |