CN213598668U - Valve control circuit for natural gas meter - Google Patents
Valve control circuit for natural gas meter Download PDFInfo
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- CN213598668U CN213598668U CN202022379632.7U CN202022379632U CN213598668U CN 213598668 U CN213598668 U CN 213598668U CN 202022379632 U CN202022379632 U CN 202022379632U CN 213598668 U CN213598668 U CN 213598668U
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- triode
- natural gas
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- control circuit
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Abstract
The utility model provides a valve control circuit for in natural gas table, including third triode Q3, fourth triode Q4, fifth triode Q5 and sixth triode Q6, third triode Q3 is parallelly connected with second diode D2, fourth triode Q4 is parallelly connected with fourth diode D4 and is connected, fifth triode Q5 is parallelly connected with third diode D3 and is connected, sixth triode Q6 is parallelly connected with fifth diode D5 and is connected, adopts the high-low level to open the valve and closes the action of valve, has solved the less direct control motor pivoted problem that can not of driving capability of singlechip pin, effectual suppression electromagnetic interference has improved the reliability of system.
Description
Technical Field
The utility model relates to a natural gas table field especially relates to a valve control circuit for in natural gas table.
Background
The natural gas in the gas pipeline enters a user household pipeline through an air bag in the gas meter, a valve is arranged in the air bag, and the opening and closing of the valve are controlled by a motor. But the stability is poor at the present stage.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to above-mentioned prior art not enough, provide a valve control circuit for in natural gas table, through the break-make of high low level control triode, stability is high.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a valve control circuit for in natural gas table, including third triode Q3, fourth triode Q4, fifth triode Q5 and sixth triode Q6, third triode Q3 is parallelly connected with second diode D2, fourth triode Q4 is parallelly connected with fourth diode D4 and is connected, fifth triode Q5 is parallelly connected with third diode D3 and is connected, sixth triode Q6 is parallelly connected with fifth diode D5 and is connected.
Further, the third transistor Q3 and the fourth transistor Q4 are connected in series to form a first circuit; the fifth triode Q5 and the sixth triode Q6 are connected in series to form a second circuit, and the first circuit and the second circuit are connected in parallel.
Further, a motor M1 is connected between the first circuit and the second circuit.
Further, the motor M1 is connected in parallel with the capacitor C1.
Further, the third transistor Q3 is connected in series with an eighth resistor R8; the fourth triode Q4 is connected in series with the seventh resistor R7.
Further, the fifth transistor Q5 is connected in series with a tenth resistor R10, and the sixth transistor Q6 is connected in series with a ninth resistor R9.
The utility model has the advantages that: the action of opening and closing the valve is carried out by adopting high and low levels, the problem that the driving capability of a pin of a single chip microcomputer is small and the motor cannot be directly controlled to rotate is solved, the electromagnetic interference is effectively inhibited, and the reliability of the system is improved.
Drawings
Fig. 1 is a schematic structural diagram of a valve control circuit for a natural gas meter according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, a valve control circuit for a natural gas meter, comprising: the three-phase current-limiting circuit comprises a third triode Q3, a fourth triode Q4, a fifth triode Q5 and a sixth triode Q6, wherein the third triode Q3 is connected with a second diode D2 in parallel, the fourth triode Q4 is connected with a fourth diode D4 in parallel, the fifth triode Q5 is connected with a third diode D3 in parallel, and the sixth triode Q6 is connected with a fifth diode D5 in parallel.
The third triode Q3 and the fourth triode Q4 are connected in series to form a first circuit; the fifth triode Q5 and the sixth triode Q6 are connected in series to form a second circuit, and the first circuit and the second circuit are connected in parallel.
A motor M1 is connected between the first circuit and the second circuit.
The motor M1 is connected in parallel with the capacitor C1.
The third triode Q3 is connected with an eighth resistor R8 in series; the fourth triode Q4 is connected in series with the seventh resistor R7.
The fifth transistor Q5 is connected in series with a tenth resistor R10, and the sixth transistor Q6 is connected in series with a ninth resistor R9.
Because the driving capability of singlechip pin is less can not direct control motor rotate.
A PNP type triode is adopted as a high-order transistor, an NPN type triode is adopted as a low-order transistor, meanwhile, in order to avoid the harm of the back electromotive force of a direct current motor, a freewheeling diode is respectively connected with two ends of the transistor, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a tenth resistor R10 are respectively connected with 4 pins of the single chip microcomputer through an optocoupler, and the single chip microcomputer outputs high and low levels to control the on-off of the triodes.
When the eighth resistor is at a low level and the ninth resistor is at a high level, the third triode Q3 and the sixth triode Q6 are conducted, the current direction is the power supply at the moment, and the third triode Q3, the motor M1, the sixth triode Q6 and the ground realize the action of opening the valve of the motor; when the tenth resistor R10 is at a low level and the seventh resistor R7 is at a high level, the fifth transistor Q5 and the fourth transistor Q4 are turned on, and current is reversed to be power, and the fifth transistor Q5, the motor M1, the fourth transistor Q4 and the ground are turned on, so that the switching action of the motor is realized.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. A valve control circuit for use in a natural gas meter, comprising: the three-phase current-limiting circuit comprises a third triode Q3, a fourth triode Q4, a fifth triode Q5 and a sixth triode Q6, wherein the third triode Q3 is connected with a second diode D2 in parallel, the fourth triode Q4 is connected with a fourth diode D4 in parallel, the fifth triode Q5 is connected with a third diode D3 in parallel, and the sixth triode Q6 is connected with a fifth diode D5 in parallel.
2. A valve control circuit for use in a natural gas meter according to claim 1, wherein: the third triode Q3 and the fourth triode Q4 are connected in series to form a first circuit; the fifth triode Q5 and the sixth triode Q6 are connected in series to form a second circuit, and the first circuit and the second circuit are connected in parallel.
3. A valve control circuit for use in a natural gas meter according to claim 2, wherein: a motor M1 is connected between the first circuit and the second circuit.
4. A valve control circuit for use in a natural gas meter according to claim 3, wherein: the motor M1 is connected in parallel with the capacitor C1.
5. A valve control circuit for use in a natural gas meter according to claim 4, wherein: the third triode Q3 is connected with an eighth resistor R8 in series; the fourth triode Q4 is connected in series with the seventh resistor R7.
6. A valve control circuit for use in a natural gas meter according to claim 5, wherein: the fifth transistor Q5 is connected in series with a tenth resistor R10, and the sixth transistor Q6 is connected in series with a ninth resistor R9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022379632.7U CN213598668U (en) | 2020-10-23 | 2020-10-23 | Valve control circuit for natural gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022379632.7U CN213598668U (en) | 2020-10-23 | 2020-10-23 | Valve control circuit for natural gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213598668U true CN213598668U (en) | 2021-07-02 |
Family
ID=76592091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022379632.7U Active CN213598668U (en) | 2020-10-23 | 2020-10-23 | Valve control circuit for natural gas meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213598668U (en) |
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2020
- 2020-10-23 CN CN202022379632.7U patent/CN213598668U/en active Active
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