CN216618732U - 220v alternating current power supply circuit of gas emergency cut-off valve - Google Patents
220v alternating current power supply circuit of gas emergency cut-off valve Download PDFInfo
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- CN216618732U CN216618732U CN202220073712.6U CN202220073712U CN216618732U CN 216618732 U CN216618732 U CN 216618732U CN 202220073712 U CN202220073712 U CN 202220073712U CN 216618732 U CN216618732 U CN 216618732U
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- supply circuit
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Abstract
The utility model discloses a 220v alternating current power supply circuit of a gas emergency cut-off valve, which comprises: rectifier bridge module U1, first step-down module, the second step-down module, first control switch, second control switch and the electric capacity that charges, rectifier bridge module U1 first input is connected to commercial power L end, rectifier bridge module U1 second input is connected to commercial power N end, rectifier bridge module U1 output spliced pole first step-down module one end and second step-down module one end, the first step-down module other end is whole gas emergency cut-off valve 220V alternating current power supply circuit's V + output, the second step-down module other end is connected to first control switch's the control end and second control switch's the control end, first switching end and the electric capacity positive pole that charges of first control switch all are connected to V + output, first control switch's the second switching end and the electric capacity's that charges negative pole all ground connection. The 220v alternating current power supply circuit of the gas emergency cut-off valve solves the problem that the alternating current 22v commercial power is inconvenient to access in the prior art.
Description
Technical Field
The utility model relates to a gas emergency cut-off valve, in particular to a 220v alternating current power supply circuit of the gas emergency cut-off valve.
Background
In the prior art, the gas emergency cut-off valve needs the direct access 220v alternating current, but the 220v alternating current can not satisfy the power supply demand of electro-magnet, and the electro-magnet needs 24v direct current voltage occasionally, consequently leads to the gas emergency cut-off valve can not the direct access commercial power and exchanges 220v, can not realize that whole gas emergency cut-off valve directly inserts the electricity and use, leads to the rate of utilization to reduce, inconvenient use.
SUMMERY OF THE UTILITY MODEL
The utility model provides a 220v alternating current power supply circuit of a gas emergency cut-off valve, and solves the problem that the alternating current 22v commercial power is inconvenient to access in the prior art.
In order to realize the purpose, the utility model adopts the following technical scheme:
the utility model discloses a 220v alternating current power supply circuit of a gas emergency cut-off valve, which comprises: a rectifier bridge module U1, a first voltage reduction module, a second voltage reduction module, a first control switch, a second control switch and a charging capacitor, wherein the first input end of the rectifier bridge module U1 is connected to the L end of commercial power, the second input end of the rectifier bridge module U1 is connected to the N end of the commercial power, the output end of the rectifier bridge module U1 is connected with one end of the first voltage reduction module and one end of the second voltage reduction module, the other end of the first voltage reduction module is the V + output end of the 220V AC power supply circuit of the whole gas emergency cut-off valve, the other end of the second voltage reduction module is connected to the control end of the first control switch and the control end of the second control switch, the first open-close end of the first control switch and the positive electrode of the charging capacitor are both connected to the V + output end, the second open-close end of the first control switch and the negative electrode of the charging capacitor are both grounded, the first open-close end of the second control switch is the V-output end of the 220V AC power supply circuit of the whole gas emergency cut-off valve, the second open-close end of the second control switch is grounded.
Preferably, the first control switch includes: the driving circuit comprises an NPN switching transistor Q2 and a resistor R2, wherein a collector of the NPN switching transistor Q2 is connected to one end of the resistor R2, the other end of the resistor R2 is a first switching end of a first control switch, and an emitter of the NPN switching transistor Q2 is a second switching end of the first control switch.
Preferably, the second control switch is an NMOS transistor Q1, the gate of the NMOS transistor Q1 is the control terminal of the second control switch, the drain of the NMOS transistor Q1 is the first open/close terminal of the second control switch, and the source of the NMOS transistor Q1 is grounded.
Preferably, the first voltage reduction module includes: diode VD1 and resistance R1, diode VD1 positive pole are connected to the output of rectifier bridge module U1, and diode VD1 negative pole is connected to resistance R1 one end, and the resistance R1 other end is the V + end.
Preferably, the second voltage dropping module includes: one end of a resistor R3 and one end of a resistor R3 are connected to the output end of the rectifier bridge module U1, and the other end of the resistor R3 is connected to the control end of the first control switch and the control end of the second switch module.
Preferably, the drain of the NMOS transistor Q1 is connected to the cathode of a current-limiting diode D2, and the anode of the current-limiting diode D2 is connected to the negative electrode of the charging capacitor.
Preferably, the mos tube is of the STP12NK80Z type.
Preferably, the rectifier bridge module U1 employs KBP 307-C87693.
Compared with the prior art, the utility model has the following beneficial effects:
1) the L end of a mains supply is connected to a first input end AC1 of a rectifier bridge module U1 through a fuse F1, the N end of the mains supply is connected to a second input end AC2 of the rectifier bridge module U1, the rectifier bridge module U1 rectifies alternating current into direct current designated voltage, the direct current designated voltage is output from a V + end after being reduced by a first voltage reduction module, the direct current designated voltage is input to a control end of a second control switch after being reduced by a second voltage reduction module, when voltage exists, the second control switch and the first control switch are both closed, the voltage is output from a V-end, and the voltage difference between the two ends of the V + end and the V-end is 24V voltage, so that power is supplied to an electromagnet, and when the voltage exists, a charging capacitor is charged;
2) and after the power failure, the first control switch is turned off, the second control switch is turned off, and the charging capacitor discharges, so that the charging capacitor discharges for a period of time after the power failure, the electromagnet can be ensured to be capable of working for a prolonged period of time, the electromagnet can still work after the power failure for a period of time, the gas emergency cut-off valve can still work after the power failure, and the safety is improved.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
Fig. 1 is a circuit diagram of an alternating current power supply circuit of a gas emergency cut-off valve 220 v.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the utility model clearer and easier to understand, the utility model is further explained by combining the drawings and the detailed implementation mode:
as shown in fig. 1, the utility model discloses a 220v alternating current power supply circuit of a gas emergency cut-off valve, comprising: a rectifier bridge module U1, a first voltage reduction module, a second voltage reduction module, a first control switch, a second control switch and a charging capacitor, wherein the first input end of the rectifier bridge module U1 is connected to the L end of commercial power, the second input end of the rectifier bridge module U1 is connected to the N end of the commercial power, the output end of the rectifier bridge module U1 is connected with one end of the first voltage reduction module and one end of the second voltage reduction module, the other end of the first voltage reduction module is the V + output end of the 220V AC power supply circuit of the whole gas emergency cut-off valve, the other end of the second voltage reduction module is connected to the control end of the first control switch and the control end of the second control switch, the first open-close end of the first control switch and the positive electrode of the charging capacitor are both connected to the V + output end, the second open-close end of the first control switch and the negative electrode of the charging capacitor are both grounded, the first open-close end of the second control switch is the V-output end of the 220V AC power supply circuit of the whole gas emergency cut-off valve, the second open-close end of the second control switch is grounded.
The first control switch includes: the driving circuit comprises an NPN switching transistor Q2 and a resistor R2, wherein a collector of the NPN switching transistor Q2 is connected to one end of the resistor R2, the other end of the resistor R2 is a first switching end of a first control switch, and an emitter of the NPN switching transistor Q2 is a second switching end of the first control switch. The resistor R2 has the function of voltage reduction, so that when the NPN switching triode Q2 is saturated, the voltages can be matched with each other, and normal charging is guaranteed.
The base electrode of the NPN switching triode Q2 is connected to a voltage stabilizing capacitor C2, a voltage stabilizing capacitor C2 and a resistor R3 form a voltage stabilizing circuit, the resistor R3 not only has the voltage reducing function, but also has the function of forming the voltage stabilizing circuit with a voltage stabilizing capacitor C2, and the output voltage of the rectifier bridge module U1 is ensured to be stable.
The second control switch is an NMOS transistor Q1, the gate of the NMOS transistor Q1 is the control end of the second control switch, the drain of the NMOS transistor Q1 is the first open/close end of the second control switch, and the source of the NMOS transistor Q1 is grounded.
The first voltage reduction module includes: diode VD1 and resistance R1, diode VD1 positive pole are connected to the output of rectifier bridge module U1, and diode VD1 negative pole is connected to resistance R1 one end, and the resistance R1 other end is the V + end. The reduction to the designated voltage is realized, and meanwhile, the diode VD1 avoids the reverse current to cause the damage of the rectifier bridge module U1.
The second voltage reduction module includes: one end of a resistor R3 and one end of a resistor R3 are connected to the output end of the rectifier bridge module U1, and the other end of the resistor R3 is connected to the control end of the first control switch and the control end of the second switch module.
The drain of the NMOS transistor Q1 is connected to the cathode of a current limiting diode D2, and the anode of the current limiting diode D2 is connected to the cathode of the charging capacitor. And limiting current to be discharged from the charging capacitor to the rectifier bridge module U1 and the NPN switching transistor Q2, and protecting the rectifier bridge module U1 and the NPN switching transistor Q2.
The mos tubes were model STP12NK 80Z.
The rectifier bridge module U1 adopts KBP 307-C87693.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. A gas quick action emergency valve 220v alternating current power supply circuit, its characterized in that includes: a rectifier bridge module U1, a first voltage reduction module, a second voltage reduction module, a first control switch, a second control switch and a charging capacitor, wherein the first input end of the rectifier bridge module U1 is connected to the L end of commercial power, the second input end of the rectifier bridge module U1 is connected to the N end of the commercial power, the output end of the rectifier bridge module U1 is connected with one end of the first voltage reduction module and one end of the second voltage reduction module, the other end of the first voltage reduction module is the V + output end of the 220V AC power supply circuit of the whole gas emergency cut-off valve, the other end of the second voltage reduction module is connected to the control end of the first control switch and the control end of the second control switch, the first open-close end of the first control switch and the positive electrode of the charging capacitor are both connected to the V + output end, the second open-close end of the first control switch and the negative electrode of the charging capacitor are both grounded, the first open-close end of the second control switch is the V-output end of the 220V AC power supply circuit of the whole gas emergency cut-off valve, the second switch end of the second control switch is grounded, the V + output end is connected with the cathode of the diode VD2, and the anode of the diode VD2 is connected with the V-output end.
2. The gas emergency cut-off valve 220v alternating current power supply circuit as claimed in claim 1, wherein the first control switch comprises: an NPN switching transistor Q2 and a resistor R2, wherein a collector of the NPN switching transistor Q2 is connected to one end of the resistor R2, the other end of the resistor R2 is a first switch end of the first control switch, and an emitter of the NPN switching transistor Q2 is a second switch end of the first control switch.
3. The power supply circuit for the gas emergency cut-off valve 220v and the alternating current as claimed in claim 2, wherein the second control switch is an NMOS transistor Q1, the gate of the NMOS transistor Q1 is the control end of the second control switch, the drain of the NMOS transistor Q1 is the first open-close end of the second control switch, and the source of the NMOS transistor Q1 is grounded.
4. The gas emergency cut-off valve 220v alternating current power supply circuit as claimed in claim 3, wherein the first voltage reduction module comprises: diode VD1 and resistance R1, diode VD1 positive pole are connected to the output of rectifier bridge module U1, and diode VD1 negative pole is connected to resistance R1 one end, and the resistance R1 other end is the V + end.
5. The gas emergency cut-off valve 220v alternating current power supply circuit as claimed in claim 4, wherein the second voltage reduction module comprises: one end of a resistor R3 and one end of a resistor R3 are connected to the output end of the rectifier bridge module U1, and the other end of the resistor R3 is connected to the control end of the first control switch and the control end of the second switch module.
6. The power supply circuit for the gas emergency cut-off valve 220v alternating current of claim 5, wherein the drain of the NMOS transistor Q1 is connected to the cathode of a current limiting diode D2, and the anode of the current limiting diode D2 is connected to the cathode of the charging capacitor.
7. The gas emergency cut-off valve 220v alternating current power supply circuit as claimed in claim 6, wherein the mos pipe is of STP12NK80Z type.
8. The power supply circuit for the gas emergency cut-off valve 220v alternating current of claim 7, wherein a rectifier bridge module U1 adopts KBP 307-C87693.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220073712.6U CN216618732U (en) | 2022-01-12 | 2022-01-12 | 220v alternating current power supply circuit of gas emergency cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220073712.6U CN216618732U (en) | 2022-01-12 | 2022-01-12 | 220v alternating current power supply circuit of gas emergency cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216618732U true CN216618732U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220073712.6U Active CN216618732U (en) | 2022-01-12 | 2022-01-12 | 220v alternating current power supply circuit of gas emergency cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216618732U (en) |
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2022
- 2022-01-12 CN CN202220073712.6U patent/CN216618732U/en active Active
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