CN205118381U - Protection valve drive circuit is pressed to gas indicated altitude - Google Patents
Protection valve drive circuit is pressed to gas indicated altitude Download PDFInfo
- Publication number
- CN205118381U CN205118381U CN201520903256.3U CN201520903256U CN205118381U CN 205118381 U CN205118381 U CN 205118381U CN 201520903256 U CN201520903256 U CN 201520903256U CN 205118381 U CN205118381 U CN 205118381U
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- valve
- driving chip
- driver chip
- chip
- pressed
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Abstract
The utility model relates to a protection valve drive circuit is pressed to gas indicated altitude, its characterized in that: it includes DC power supply (1), rectifier diode (2), farad electric capacity (4), driver chip (5) and valve (6), output connection valves (6) of driver chip (5), input directness and singlechip (7) of driver chip (5) are connected, DC power supply (1) through rectifier diode (2) back and the power inputs of driver chip (5) end necklace the parallelly connected farad electric capacity (4) of power access end of driver chip (5). The utility model discloses the use of well rectifier diode, zener diode and farad electric capacity can guarantee when external input voltage is greater than 12V that the valve is in the closed condition, avoids the loss of gas company.
Description
Technical field
The utility model relates to a kind of circuitry of gas meter, particularly relates to gas meter high voltage protective valve driving circuit.
Background technique
The mode that the drive circuit of the internal or external valve of general gas meter adopts NPN with low cost and PNP triode to be combined into H bridge drives valve to do switch valve action.The driving shortcoming of this kind of mode is that the component of actuating valve gate switch is many, driving current is little, protective value is low, interference free performance is low.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of high voltage protective valve driving circuit, reaches the reliability and stability of valve switch.
The purpose of this utility model is achieved in that a kind of gas meter high voltage protective valve driving circuit; it comprises DC electrical source, commutation diode, farad capacitor, driving chip and valve; the output terminal of described driving chip connects valve; the input end of driving chip is directly connected with single-chip microcomputer; described DC electrical source by after commutation diode with the power input necklace of driving chip, at the power access end of described driving chip farad capacitor in parallel.
At the two ends shunt regulator diode of described farad capacitor, protection driving chip is not reversed and punctures.
Compared with prior art, the beneficial effects of the utility model are:
1, use L9110 driving chip to replace the valve driving circuit that in the past be made up of discrete component, gas meter is occur first, makes peripheral cell cost low, pcb board wire structures is simple, whole aircraft reliability improves.This chip has the compatible level input of two TTL/COMS, has good anti-interference; Forward and reverse motion of two output terminal energy Direct driver valves, has larger current driving ability, and each passage capable of being is by the follow current of 800mA, and its peak current capability can reach 1.5A; There is lower output saturation pressure drop simultaneously; The reverse impact electric current of built-in clamp diode energy relief valve inductive load makes it do in switch valve use safe and reliable at driving valve.
2, in the utility model, when extraneous input voltage is greater than 12V, the use of commutation diode, reference diode and farad capacitor can ensure that valve is in closed condition, avoids gas company to lose.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
See Fig. 1, the utility model relates to a kind of gas meter high voltage protective valve driving circuit, comprise direct current 6v power supply 1, commutation diode 2, reference diode 3,5.5v0.47F farad capacitor 4, L9110 driving chip 5 and valve 6, in driving chip 5 periphery of described valve 6 without the need to increasing additional element, the output terminal of L9110 driving chip 5 connects valve 6; The input end of L9110 driving chip 5 is directly connected with single-chip microcomputer 7, sends switch valve control command to L9110 driving chip 5 by single-chip microcomputer 7; The power supply of L9110 driving chip 5 is supplied through commutation diode 2 by direct current 6V power supply 1, simultaneously at the power access end of L9110 driving chip 5 farad capacitor 4 in parallel; For preventing DC electrical source from connecing instead, also at farad capacitor 4 two ends shunt regulator diode 3, protection L9110 driving chip is not reversed and punctures.
Described L9110 driving chip 5 is the two passage push-pull mode power amplification specific integrated circuit devices controlled and drive motor designs.
Described commutation diode 2, reference diode 3 and farad capacitor 4 ensure that L9110 driving chip is powered not by affected by high, and can provide continual and steady ground voltage.
Claims (2)
1. a gas meter high voltage protective valve driving circuit; it is characterized in that: it comprises DC electrical source (1), commutation diode (2), farad capacitor (4), driving chip (5) and valve (6); the output terminal of described driving chip (5) connects valve (6); the input end of driving chip (5) is directly connected with single-chip microcomputer (7); described DC electrical source (1) by commutation diode (2) afterwards with the power input necklace of driving chip (5), the power access end of described driving chip (5) farad capacitor (4) in parallel.
2. a kind of gas meter high voltage protective valve driving circuit according to claim 1, is characterized in that: at the two ends shunt regulator diode (3) of described farad capacitor (5), and protection driving chip (5) is not reversed and punctures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520903256.3U CN205118381U (en) | 2015-11-14 | 2015-11-14 | Protection valve drive circuit is pressed to gas indicated altitude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520903256.3U CN205118381U (en) | 2015-11-14 | 2015-11-14 | Protection valve drive circuit is pressed to gas indicated altitude |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205118381U true CN205118381U (en) | 2016-03-30 |
Family
ID=55573996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520903256.3U Active CN205118381U (en) | 2015-11-14 | 2015-11-14 | Protection valve drive circuit is pressed to gas indicated altitude |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205118381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482644A (en) * | 2017-08-21 | 2017-12-15 | 海特尔机电工程技术（马鞍山）有限公司 | A kind of SVG device |
-
2015
- 2015-11-14 CN CN201520903256.3U patent/CN205118381U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482644A (en) * | 2017-08-21 | 2017-12-15 | 海特尔机电工程技术（马鞍山）有限公司 | A kind of SVG device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |