CN202522931U - Gas flow control device - Google Patents
Gas flow control device Download PDFInfo
- Publication number
- CN202522931U CN202522931U CN2011204937994U CN201120493799U CN202522931U CN 202522931 U CN202522931 U CN 202522931U CN 2011204937994 U CN2011204937994 U CN 2011204937994U CN 201120493799 U CN201120493799 U CN 201120493799U CN 202522931 U CN202522931 U CN 202522931U
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- Prior art keywords
- control device
- gas
- gas flow
- flow
- flow control
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Abstract
The utility model discloses a gas flow control device comprising a control unit, a proportional valve and a quality flow sensor, wherein the proportional valve and the quality flow sensor are respectively connected with a control unit. The gas flow control device performs real-time measurement of the flow of the gas by using the quality flow sensor and makes the control unit process the flow information and send out the control command to the proportional valve; and the proportional valve regulates the flow of the gas. The gas flow control device has the advantages of having high control precision and high stability, being small and exquisite in volume, and being compact in structure. The gas flow control device utilizes the quality flow sensor, thus being not influenced by the environmental temperature and the air pressure of the front and back ends during the work process.
Description
Technical field
The utility model relates to gas flow control technology field, relates in particular to a kind of heat type flow quantity controller.
Background technology
At present, the flow rate controlling method of widespread use is in chromatographic apparatus: adopt mechanical valve that gas flow is controlled.But because the continuous variation of analysis condition, gas flow also constantly changes thereupon.This makes that the ratio of gas changes in analytic process, thereby can produce analytical error.Therefore, the flow of pilot-gas how, and then reduce analytical error and become a problem demanding prompt solution.
The utility model content
The technical matters that (one) will solve
The technical matters that the utility model will solve is: a kind of gas flow control device is provided; It can be controlled the flow of gas accurately; Thereby can reduce analytical error, and its course of work do not receive environment temperature and front and back end barometric pressure effect, response speed is fast.
(2) technical scheme
For addressing the above problem, the utility model provides a kind of gas flow control device, comprises control module and the proportioning valve and the mass flow sensor that are connected respectively with said control module.
Preferably, said control module comprises A/D modular converter and the serial output module that connects in order.
Preferably, said device also comprises the display device that is connected with said control module.
Preferably, said proportioning valve is connected with said control module through the D/A modular converter.
Preferably, said proportioning valve is connected through gas circuit with mass flow sensor.
(3) beneficial effect
The device of the utility model is through adopting the flow of the real-time measurement gas of mass flow sensor; And after being handled said flow information, control module sends control command to proportioning valve; By proportioning valve the flow of gas is regulated; Make control accuracy higher, stability better, and its advantages of small volume, compact conformation.In addition, the utility model is owing to adopted mass flow sensor, and its course of work is neither influenced by ambient temperature, does not receive the influence of front and back end air pressure again.
Description of drawings
Fig. 1 is the structural representation of gas flow control device described in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the embodiment of the utility model is described in further detail.Following examples are used to explain the utility model, but are not used for limiting the scope of the utility model.
As shown in Figure 1, the described a kind of gas flow control device of the utility model comprises control module and the proportioning valve and the mass flow sensor that are connected respectively with said control module.
Wherein, said control module comprises A/D modular converter, computing module and the serial output module that is integrated in single-chip microcomputer inside.Said A/D modular converter, computing module and serial output module are connected in order.Said proportioning valve is connected through gas circuit with mass flow sensor.Said proportioning valve is connected with said control module through the D/A modular converter.Preferably, said device also comprises the liquid crystal display that is connected with said control module.
The course of work of the utility model:
Get into mass flow sensor by the gas cylinder effluent air; Mass flow sensor is gathered the flow information of gas and is sent to control module; Control module sends control command through the processing to said flow information to proportioning valve, and proportioning valve is regulated the flow of gas; Gas flow is stabilized in the permissible error scope of setting, output is at last supplied with and is used device of air.Wherein, mass flow sensor can adopt the AWM43300 type mass flow sensor of U.S. Honeywell company production, can the flow of 0～1000sccm be converted to the voltage signal of 1～5V.The PIC16F877A type microcontroller that control module can adopt U.S. Microchip company to produce; The voltage signal of control module pick-up transducers also carries out the A/D conversion; Again through handling the digital signal of sending the control ratio valve; Export after the process D/A converter converts simulating signal to, be used to drive proportioning valve.
Above embodiment only is used to explain the utility model; And be not the restriction to the utility model; The those of ordinary skill in relevant technologies field under the situation of spirit that does not break away from the utility model and scope, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to the category of the utility model, and the scope of patent protection of the utility model should be defined by the claims.
Claims (5)
1. a gas flow control device is characterized in that, comprises control module and the proportioning valve and the mass flow sensor that are connected respectively with said control module.
2. gas flow control device as claimed in claim 1 is characterized in that, said control module comprises A/D modular converter and the serial output module that connects in order.
3. gas flow control device as claimed in claim 1 is characterized in that, also comprises the display device that is connected with said control module.
4. gas flow control device as claimed in claim 1 is characterized in that, said proportioning valve is connected with said control module through the D/A modular converter.
5. gas flow control device as claimed in claim 1 is characterized in that said proportioning valve is connected through gas circuit with mass flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204937994U CN202522931U (en) | 2011-12-01 | 2011-12-01 | Gas flow control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204937994U CN202522931U (en) | 2011-12-01 | 2011-12-01 | Gas flow control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202522931U true CN202522931U (en) | 2012-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204937994U Expired - Lifetime CN202522931U (en) | 2011-12-01 | 2011-12-01 | Gas flow control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202522931U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018381A (en) * | 2012-11-23 | 2013-04-03 | 上海仪电分析仪器有限公司 | Automatic control structure for gas chromatograph flame ionization detector air inlet path |
| CZ305093B6 (en) * | 2013-06-26 | 2015-04-29 | Technická univerzita v Liberci | Compensation device for proportional pneumatic distributor |
| CN105005224A (en) * | 2015-06-24 | 2015-10-28 | 江苏德厚机电有限公司 | Dryer control unit maintaining constant regeneration air consumption rate |
| CN106492307A (en) * | 2016-12-31 | 2017-03-15 | 江苏顺源集团有限公司 | A kind of intravenous inject transfusion sensor |
-
2011
- 2011-12-01 CN CN2011204937994U patent/CN202522931U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018381A (en) * | 2012-11-23 | 2013-04-03 | 上海仪电分析仪器有限公司 | Automatic control structure for gas chromatograph flame ionization detector air inlet path |
| CZ305093B6 (en) * | 2013-06-26 | 2015-04-29 | Technická univerzita v Liberci | Compensation device for proportional pneumatic distributor |
| CN105005224A (en) * | 2015-06-24 | 2015-10-28 | 江苏德厚机电有限公司 | Dryer control unit maintaining constant regeneration air consumption rate |
| CN105005224B (en) * | 2015-06-24 | 2018-03-27 | 江苏德厚机电有限公司 | Keep the constant drier control unit of regeneration air rate |
| CN106492307A (en) * | 2016-12-31 | 2017-03-15 | 江苏顺源集团有限公司 | A kind of intravenous inject transfusion sensor |
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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: 20121107 |