Electromagnetic gas emergency shut-off valve control circuit

Abstract

The utility model discloses an electromagnetic formula gas emergency cut -out valve control circuit, include: control module, switch drive module and power module, power module input end is connected to the positive pole of power supply battery, switch drive module includes: first control switch unit, second control switch unit and step -down power supply unit, and the second output of power module is powered for the coil high -voltage end in gas emergency cut -out valve through first control switch unit, and the second output of power module is connected to the high -voltage end of step -down power supply unit, and the low -voltage end of step -down power supply unit is grounded through second control switch unit, and the control end of first control switch unit is connected to the output end of step -down power supply unit, and the input end of second control switch unit is connected to control module first output, and the first output of power module is the power supply for control unit. The electromagnetic formula gas emergency cut -out valve control circuit solves the problem that cannot realize automatic control coil drive valve rod operation in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of gas emergency shut-off valve control, specifically to an electromagnetic gas emergency shut-off valve control circuit. Background Technology

[0002] Chinese patent discloses a Hall effect detection wireless gas emergency shut-off valve with application number CN202223132490.X. The Hall effect detection wireless gas emergency shut-off valve includes: a housing, a valve stem, a controller, and a Hall sensor. A movable valve stem is installed inside the housing, and a detection magnetic ring is installed on the valve stem. The detection magnetic ring can move with the valve stem. A Hall sensor is installed on the housing and is located next to the detection magnetic ring.

[0003] Although this Hall effect detection wireless gas emergency shut-off valve solves the problem of not being able to automatically monitor whether it is in the shut-off or open state, it still has a drawback: it cannot control the coil that drives the valve stem, which means that the entire Hall effect detection wireless gas emergency shut-off valve cannot be automatically controlled. Summary of the Invention

[0004] This utility model provides a control circuit for an electromagnetic gas emergency shut-off valve, solving the problem in the prior art that it is impossible to achieve automatic control of the coil to drive the valve stem.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: This utility model discloses an electromagnetic gas emergency shut-off valve control circuit, including: a control module, a switch drive module, and a power supply module; the input terminal of the power supply module is connected to the positive terminal of a power supply battery; the switch drive module includes: a first control switch unit, a second control switch unit, and a step-down power supply unit; the second output terminal of the power supply module supplies power to the high-voltage terminal of the coil in the gas emergency shut-off valve through the first control switch unit; the second output terminal of the power supply module is connected to the high-voltage terminal of the step-down power supply unit; the low-voltage terminal of the step-down power supply unit is grounded through the second control switch unit; the control terminal of the first control switch unit is connected to the output terminal of the step-down power supply unit; the input terminal of the second control switch unit is connected to the first output terminal of the control module; the first output terminal of the power supply module supplies power to the control unit.

[0006] Preferably, the power supply module includes: a first boost regulator unit and a second boost regulator unit, wherein the input terminal of the first boost regulator unit is the input terminal of the power supply module, the output terminal of the first boost regulator unit is the first output terminal of the power supply module, the output terminal of the first boost regulator unit is used to connect to the input terminal of the second boost regulator unit, and the output terminal of the second boost regulator unit is the second output terminal of the power supply module.

[0007] Preferably, the output of the first boost regulator unit is connected to the input of an intermediate switch unit, the output of the intermediate switch unit is connected to the input of the second boost regulator unit, and the intermediate switch unit is connected to the second output of the control module.

[0008] Preferably, the power supply module further includes: a first voltage detection unit and a second voltage detection unit, wherein the high voltage terminal of the first voltage detection unit is connected to the input terminal of the first boost regulator unit, the output terminal of the first voltage detection unit is connected to the first input terminal of the control module, and the low voltage terminal of the first voltage detection unit is connected to the third output terminal of the control module; the high voltage terminal of the second voltage detection unit is connected to the output terminal of the second boost regulator unit, the output terminal of the second voltage detection unit is connected to the second input terminal of the control module, and the low voltage terminal of the second voltage detection unit is connected to the fourth output terminal of the control module.

[0009] Preferably, the switch drive module further includes: a control and voltage regulation unit, wherein the high-pressure end of the coil in the gas emergency shut-off valve is connected to the high-pressure end of the control and voltage regulation unit, and the low-pressure end of the coil in the gas emergency shut-off valve is connected to the low-pressure end of the control and voltage regulation unit.

[0010] Preferably, the first control switch unit includes: a transistor T1, the emitter of transistor T1 is connected to the second output terminal of the power supply module, the collector of transistor T1 is connected to the high voltage terminal of the coil in the gas emergency shut-off valve, and the base of transistor T1 is the control terminal of the first control switch unit.

[0011] Preferably, the second control switch unit includes: resistor R3, resistor R4 and transistor T2. The first end of resistor R3 is the control terminal of the second control switch unit, the second end of resistor R3 is connected to the base of transistor T2, the emitter of transistor T2 is grounded through resistor R4, and the collector of transistor T2 is used to connect to the low-voltage terminal of the step-down power supply unit.

[0012] Preferably, the step-down power supply unit includes: resistor R1 and resistor R2, the first end of resistor R1 is the high-voltage end of the step-down power supply unit, the second end of resistor R1 is connected to the first end of resistor R2, the second end of resistor R2 is the low-voltage end of the step-down power supply unit, and the first end of resistor R2 is used to connect to the control end of the first control switch unit.

[0013] Compared to existing technologies, this utility model has the following advantages: In this application, by setting a first control switch unit to supply power to the high-voltage end of the coil in the gas emergency shut-off valve, the high-voltage end of the coil in the gas emergency shut-off valve is connected to the second output terminal of the power supply module when the first control switch unit is closed. By setting a second control switch unit, the control terminal of the first control switch unit is controlled to be connected to a high level. When the control terminal of the first control switch unit is connected to a high level, the first control switch unit is closed. The first and second control switch units jointly control whether the power supply is on or off, making the control more stable and reliable. Since the control terminal of the first control switch unit requires a high level, a step-down power supply unit is designed. The high-voltage end of the step-down power supply unit is connected to the second output terminal of the power supply module, so that the step-down power supply unit is powered on. When the control module controls the control terminal of the second control switch unit to be high, the second control switch unit is closed. At this time, the low-voltage end of the step-down power supply unit is connected to ground, and the step-down power supply unit outputs a high level to the control terminal of the first control switch unit, thereby realizing the joint control of the first and second control switch units to control whether the coil is connected to the second output terminal of the power supply module.

[0014] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0015] Figure 1 This is the circuit diagram for the switch driver module.

[0016] Figure 2 This is a circuit diagram of the first boost and voltage regulation unit in the power supply module.

[0017] Figure 3 This is a circuit diagram of the second boost regulator unit in the power supply module.

[0018] Figure 4 This is the circuit diagram for the control module. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 4As shown, this utility model discloses an electromagnetic gas emergency shut-off valve control circuit, including: a control module, a switch drive module, and a power supply module; the input terminal of the power supply module is connected to the positive terminal of the power supply battery J3; the switch drive module includes: a first control switch unit, a second control switch unit, and a step-down power supply unit; the second output terminal VFM of the power supply module supplies power to the high-voltage terminal of the coil L2 in the gas emergency shut-off valve through the first control switch unit; the second output terminal VFM of the power supply module is connected to the high-voltage terminal of the step-down power supply unit; the low-voltage terminal of the step-down power supply unit is grounded through the second control switch unit; the control terminal of the first control switch unit is connected to the output terminal of the step-down power supply unit; the input terminal of the second control switch unit is connected to the first output terminal FO of the control module; the first output terminal VDD of the power supply module supplies power to the control unit.

[0021] In this application, the control module primarily uses the BC66F3652 control chip, although other models can also be used. Pin PB4 of the control chip is the first output terminal FO of the control module, and pin PB3 is the second output terminal FMEN of the control module.

[0022] In this application, the power supply module includes a first boost regulator unit and a second boost regulator unit. The input terminal of the first boost regulator unit is the input terminal of the power supply module, and the output terminal of the first boost regulator unit is the first output terminal VDD of the power supply module. The output terminal of the first boost regulator unit is connected to the input terminal of the second boost regulator unit, and the output terminal of the second boost regulator unit is the second output terminal VFM of the power supply module. Since the control module requires a working voltage of 5V, the coil L2 requires a working voltage of 12V, and the dual power supply battery J3 outputs 3V, a first boost regulator unit is designed to boost the 3V to 5V, and a second boost regulator unit is designed to boost the 5V to 12V to meet the different module working voltage requirements.

[0023] Preferably, the output of the first boost regulator unit is connected to the input of an intermediate switch unit, the output of the intermediate switch unit is connected to the input of the second boost regulator unit, and the intermediate switch unit is connected to the second output terminal FMEN of the control module. By setting the intermediate switch unit, the output voltage of the second output terminal of the power supply module is controlled.

[0024] Preferably, the power supply module further includes: a first voltage detection unit and a second voltage detection unit. The high-voltage terminal of the first voltage detection unit is connected to the input terminal of the first boost regulator unit, the output terminal of the first voltage detection unit is connected to the first input terminal of the control module, and the low-voltage terminal of the first voltage detection unit is connected to the third output terminal of the control module. The high-voltage terminal of the second voltage detection unit is connected to the output terminal of the second boost regulator unit, the output terminal of the second voltage detection unit is connected to the second input terminal of the control module, and the low-voltage terminal of the second voltage detection unit is connected to the fourth output terminal of the control module. The first voltage detection unit detects the positive terminal voltage of the power supply battery, and the second voltage detection unit detects the voltage at the second output terminal of the power supply module.

[0025] Preferably, the first boost regulator unit includes: a fuse F1, a diode D3, capacitors C2, C3, and C4, a resistor R5, and a boost chip U1, which can be an MD5327 chip. The first terminal of fuse F1 is the input terminal of the first boost regulator unit. The second terminal of fuse F1 is connected to the input terminal of the first voltage detection unit and to the anode of diode D3. The cathode of diode D3 is connected to the input terminal of boost chip U1 and the positive terminal of capacitor C2. The output terminal of boost chip U1 is the output terminal of the first boost regulator unit. The output terminal of boost chip U1 is connected to the positive terminal of capacitor C3 and the first terminal of resistor R5. The negative terminals of capacitors C2, C3, and C4 are all grounded. The second terminal of resistor R5 is connected to the positive terminal of capacitor C4. Capacitors C2, C3, C4, and resistor R5 all serve a voltage regulation function.

[0026] Preferably, the second boost regulator unit includes: capacitors C5, C6, and C7; resistors R6, R7, and R8; inductor L1; diode D2; and boost chip U2. Boost chip U2 can be a CE8304 model. The VIN input pin of boost chip U2 is the input terminal of the second boost regulator unit. The VIN input pin of boost chip U2 is connected to the positive terminal of capacitor C5, the first terminal of inductor L1, and the first terminal of resistor R6. The negative terminal of capacitor C5 is grounded. The second terminal of inductor L1 is connected to the SW output pin of boost chip U2 and the anode of diode D2. The second terminal of resistor R6 is connected to the SW output pin of boost chip U2. The cathode of diode D2 is connected to the first terminal of resistor R7, the positive terminal of capacitor C6, and the negative terminal of capacitor C7. The second terminal of resistor R7 is connected to the first terminal of resistor R8 and the FB pin of boost chip U2. The second terminal of resistor R8 is grounded. The GND pin of boost chip U2 is grounded. The cathode of diode D2 is the output terminal of the second boost regulator unit. Capacitors C5, C6, and C7, resistors R6, R7, and R8, and inductor L1 all serve a voltage stabilizing function. Diode D2 is used to limit the direction of current.

[0027] Preferably, the intermediate switching unit includes: resistors R11 and R12, an NPN transistor Q3, diodes D1 and D0. The collector of NPN transistor Q3 is connected to the first output terminal VDD of the power supply module and the first terminal of resistor R12. The emitter of NPN transistor Q3 is connected to the cathodes of diodes D1 and D0. The anodes of diodes D1 and D0 are both grounded. The second terminal of resistor R12 is connected to the base of NPN transistor Q3 and the first terminal of resistor R11. The second terminal of resistor R11 is the control terminal of the intermediate switching unit. This ensures that when the control terminal of the intermediate switching unit is high, NPN transistor Q3 is closed, and the input terminal of the second boost regulator unit has voltage; when the control terminal of the intermediate switching unit is low, NPN transistor Q3 is open, and the input terminal of the second boost regulator unit has no voltage, thereby controlling whether the output terminal of the first boost regulator unit and the input terminal of the second boost regulator unit are connected.

[0028] Preferably, both the first voltage detection unit and the second voltage detection unit include: resistor R10, resistor R9, and capacitor C9. The first terminal of resistor R10 is the high-voltage terminal of the first or second voltage detection unit. The second terminal of resistor R10 is connected to the first terminal of resistor R9 and the positive terminal of capacitor C9. The negative terminal of capacitor C9 is grounded. The second terminal of resistor R10 is the output terminal of the first or second voltage detection unit, and the second terminal of resistor R9 is the low-voltage terminal of the first or second voltage detection unit. This ensures that when the control module sets the low-voltage terminal of the first or second voltage detection unit to a low level, the circuit containing resistors R10 and R9 is energized. If there is a voltage output at the second terminal of resistor R10, it indicates that the power supply battery J3 is powered or the second boost regulator unit is powered; if there is no voltage output at the second terminal of resistor R10, it indicates that the power supply battery J3 is de-energized or the second boost regulator unit is de-energized.

[0029] In this application, the switch drive module further includes: a control voltage regulator unit, wherein the high-voltage terminal of the coil L2 in the gas emergency shut-off valve is connected to the high-voltage terminal of the control voltage regulator unit, and the low-voltage terminal of the coil L2 in the gas emergency shut-off valve is connected to the low-voltage terminal of the control voltage regulator unit. The control voltage regulator unit includes: a capacitor C1, a diode D4, and a diode D5. The positive terminal of capacitor C1, the cathode of diode D4, and the cathode of diode D5 are connected to form the high-voltage terminal of the control voltage regulator unit, and the negative terminal of capacitor C1, the anode of diode D4, and the anode of diode D5 are connected to form the low-voltage terminal of the control voltage regulator unit.

[0030] The first control switch unit includes: a transistor T1, the emitter of transistor T1 is connected to the second output terminal VFM of the power supply module, the collector of transistor T1 is connected to the high voltage terminal of the coil L2 in the gas emergency shut-off valve, and the base of transistor T1 is the control terminal of the first control switch unit.

[0031] The second control switch unit includes: resistor R3, resistor R4 and transistor T2. The first end of resistor R3 is the control terminal of the second control switch unit, the second end of resistor R3 is connected to the base of transistor T2, the emitter of transistor T2 is grounded through resistor R4, and the collector of transistor T2 is used to connect to the low voltage terminal of the step-down power supply unit.

[0032] The step-down power supply unit includes resistors R1 and R2. The first terminal of resistor R1 is the high-voltage terminal of the step-down power supply unit, and the second terminal of R1 is connected to the first terminal of resistor R2, which is the low-voltage terminal. The first terminal of resistor R2 is connected to the control terminal of the first control switch unit. Since the voltage at the control terminal of the first control switch unit is very low if no step-down power supply unit is connected after the second control switch unit is energized, it is impossible for the first control switch unit to close. Therefore, the step-down power supply unit composed of resistors R1 and R2 is designed so that when the second control switch unit is closed, the step-down power supply unit composed of resistors R1 and R2 is grounded and conducts, resulting in a higher voltage output from the first terminal of resistor R2 to the control terminal of the first control switch unit, thus closing the control terminal of the first control switch unit.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A control circuit for an electromagnetic gas emergency shut-off valve, characterized in that, include: Control module, switch driver module, and power supply module; The power supply module input is connected to the positive terminal of the power supply battery; The switch drive module includes: a first control switch unit, a second control switch unit, and a step-down power supply unit. The second output terminal of the power supply module supplies power to the high-voltage terminal of the coil in the gas emergency shut-off valve through the first control switch unit. The second output terminal of the power supply module is connected to the high-voltage terminal of the step-down power supply unit. The low-voltage terminal of the step-down power supply unit is grounded through the second control switch unit. The control terminal of the first control switch unit is connected to the output terminal of the step-down power supply unit. The input terminal of the second control switch unit is connected to the first output terminal of the control module. The first output of the power supply module supplies power to the control unit.

2. The electromagnetic gas emergency shut-off valve control circuit according to claim 1, characterized in that, The power supply module includes a first boost regulator unit and a second boost regulator unit. The input terminal of the first boost regulator unit is the input terminal of the power supply module, the output terminal of the first boost regulator unit is the first output terminal of the power supply module, the output terminal of the first boost regulator unit is used to connect to the input terminal of the second boost regulator unit, and the output terminal of the second boost regulator unit is the second output terminal of the power supply module.

3. The electromagnetic gas emergency shut-off valve control circuit according to claim 2, characterized in that, The output of the first boost regulator unit is connected to the input of an intermediate switch unit, the output of the intermediate switch unit is connected to the input of the second boost regulator unit, and the intermediate switch unit is connected to the second output of the control module.

4. The electromagnetic gas emergency shut-off valve control circuit according to claim 3, characterized in that, The power supply module also includes: a first voltage detection unit and a second voltage detection unit. The high voltage terminal of the first voltage detection unit is connected to the input terminal of the first boost regulator unit, the output terminal of the first voltage detection unit is connected to the first input terminal of the control module, and the low voltage terminal of the first voltage detection unit is connected to the third output terminal of the control module. The high voltage terminal of the second voltage detection unit is connected to the output terminal of the second boost regulator unit, the output terminal of the second voltage detection unit is connected to the second input terminal of the control module, and the low voltage terminal of the second voltage detection unit is connected to the fourth output terminal of the control module.

5. The electromagnetic gas emergency shut-off valve control circuit according to any one of claims 1 to 4, characterized in that, The switch drive module also includes: a control and voltage regulation unit, wherein the high-pressure end of the coil in the gas emergency shut-off valve is connected to the high-pressure end of the control and voltage regulation unit, and the low-pressure end of the coil in the gas emergency shut-off valve is connected to the low-pressure end of the control and voltage regulation unit.

6. The electromagnetic gas emergency shut-off valve control circuit according to claim 5, characterized in that, The first control switch unit includes: a transistor T1, the emitter of transistor T1 is connected to the second output terminal of the power supply module, the collector of transistor T1 is connected to the high voltage terminal of the coil in the gas emergency shut-off valve, and the base of transistor T1 is the control terminal of the first control switch unit.

7. The electromagnetic gas emergency shut-off valve control circuit according to claim 6, characterized in that, The second control switch unit includes: resistor R3, resistor R4 and transistor T2. The first end of resistor R3 is the control terminal of the second control switch unit, the second end of resistor R3 is connected to the base of transistor T2, the emitter of transistor T2 is grounded through resistor R4, and the collector of transistor T2 is used to connect to the low voltage terminal of the step-down power supply unit.

8. The electromagnetic gas emergency shut-off valve control circuit according to claim 7, characterized in that, The step-down power supply unit includes: resistor R1 and resistor R2. The first end of resistor R1 is the high-voltage end of the step-down power supply unit, the second end of resistor R1 is connected to the first end of resistor R2, the second end of resistor R2 is the low-voltage end of the step-down power supply unit, and the first end of resistor R2 is used to connect to the control end of the first control switch unit.

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