Valve body monitoring control system

Abstract

The utility model relates to a valve body monitoring control system which comprises a first control circuit, a second control circuit, a step-down circuit and a valve body monitoring control circuit. The step-down circuit is respectively connected with the first control circuit and the second control circuit and is used for providing voltage; the first control circuit and the second control circuit are connected and are used for mutually detecting whether the first control circuit and the second control circuit operate normally or not; and the first control circuit and the second control circuit are respectively connected with the valve body monitoring control circuit and are used for monitoring and controlling the operation of the valve body. The two control circuits are adopted to control the valve body respectively, the two control circuits communicate with each other for monitoring, if one control circuit breaks down, the other control circuit can also control the valve body, and the safety of the gas system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve body control systems, and particularly relates to a valve body monitoring and control system. Background Art

[0002] At present, most control circuits of steam furnace valve bodies do not have an internal fault safety protection function. When a control component in the valve body control circuit fails, the valve body control will fail, posing a safety risk of gas leakage. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a valve body monitoring and control system.

[0004] The purpose of the utility model can be realized by the following technical solutions:

[0005] A valve body monitoring and control system includes a first control circuit, a second control circuit, a buck circuit, and a valve body monitoring and control circuit;

[0006] The buck circuit is connected to the first control circuit and is used to supply power to the first control circuit;

[0007] The first control circuit is connected to the second control circuit and is used to detect whether each other is operating normally;

[0008] The first control circuit and the second control circuit are respectively connected to the valve body monitoring and control circuit and are used to monitor and control the operation of the valve body.

[0009] According to the valve body monitoring and control system of the embodiment of the utility model, it has at least the following technical effects: Two control circuits are used to control the valve body respectively, and the two control circuits communicate and monitor each other. If one control circuit fails, the other control circuit can still control the valve body, increasing the safety of the gas system.

[0010] According to some embodiments of the utility model, the valve body monitoring and control circuit includes a valve body total control circuit, a first valve body control circuit, a second valve body control circuit, and a third valve body control circuit;

[0011] The first control circuit and the second control circuit are respectively connected to the valve body total control circuit;

[0012] The second control circuit and the valve body total control circuit are respectively connected to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit.

[0013] According to some embodiments of the present utility model, the total control circuit of the valve body includes a valve body power supply circuit, a valve body drive circuit, a temperature control detection circuit, and a valve power supply detection circuit;

[0014] The valve body power supply circuit includes a first power supply, a second power supply, a first switch, a first MOS transistor, and a ninth resistor. The first power supply is connected to the source of the first MOS transistor through the first switch. The second power supply is respectively connected to the source of the first MOS transistor and one end of the ninth resistor. The other end of the ninth resistor is connected to the gate of the first MOS transistor. The drain of the first MOS transistor is respectively connected to a first valve body control circuit, a second valve body control circuit, and a third valve body control circuit;

[0015] The valve body drive circuit includes a twelfth resistor, a thirteenth resistor, a sixteenth resistor, and a third triode. The base of the third triode is respectively connected to one end of the thirteenth resistor and one end of the sixteenth resistor. The collector of the third triode is connected to one end of the twelfth resistor. The emitter of the third triode is grounded. The other end of the thirteenth resistor is connected to the first control circuit. The other end of the sixteenth resistor is grounded. The other end of the twelfth resistor is connected to the gate of the first MOS transistor;

[0016] The temperature control detection circuit includes a third power supply, a first triode, a sixth resistor, a seventh resistor, an eighth resistor, and a tenth resistor. The collector of the first triode is respectively connected to one end of the sixth resistor and one end of the seventh resistor. The base of the first triode is connected to one end of the eighth resistor and one end of the tenth resistor. The emitter of the first triode is grounded. The other end of the sixth resistor is connected to the third power supply. The other end of the seventh resistor is connected to the second control circuit. The other end of the eighth resistor is connected to the source of the first MOS transistor. The other end of the tenth resistor is grounded;

[0017] The valve power supply detection circuit includes a second triode, an eleventh resistor, a fourteenth resistor, a fifteenth resistor, and a seventeenth resistor. The collector of the second triode is respectively connected to one end of the eleventh resistor and one end of the fourteenth resistor. The base of the second triode is respectively connected to one end of the fifteenth resistor and one end of the seventeenth resistor. The emitter of the second triode is grounded. The other end of the eleventh resistor is connected to the third power supply. The other end of the fourteenth resistor is connected to the second control circuit. The other end of the fifteenth resistor is connected to the drain of the first MOS transistor. The other end of the seventeenth resistor is grounded.

[0018] According to some embodiments of the present utility model, the valve body monitoring and control circuit further includes a first valve detection circuit. The first valve detection circuit includes a third power supply, a fourth triode, a twenty-fourth resistor, a twenty-ninth resistor, and a thirty-ninth resistor. The collector of the fourth triode is respectively connected to one end of the twenty-fourth resistor and one end of the twenty-ninth resistor. The base of the fourth triode is respectively connected to one end of the thirty-ninth resistor, the first valve body control circuit, and the second valve body control circuit. The emitter of the fourth triode is grounded. The other end of the twenty-fourth resistor is connected to the third power supply. The other end of the twenty-ninth resistor is connected to the second control circuit. The other end of the thirty-ninth resistor is grounded.

[0019] According to some embodiments of the present utility model, the first valve body control circuit includes a first valve body power supply circuit and a first valve body drive circuit;

[0020] The first valve body power supply circuit includes a second MOS transistor, a fourth diode D, a first valve body, an eighteenth resistor, a twenty-first resistor, and a thirty-fifth resistor. The source of the second MOS transistor is respectively connected to one end of the eighteenth resistor, one end of the twenty-first resistor, and the valve body total control circuit. The gate of the second MOS transistor is respectively connected to the other end of the eighteenth resistor and the first valve body drive circuit. The drain of the second MOS transistor is respectively connected to the other end of the twenty-first resistor, one end of the thirty-fifth resistor, and one end of the first valve body. The other end of the thirty-fifth resistor is connected to the base of the fourth triode. One end of the first valve body is also connected to the negative electrode of the fourth diode D. The other end of the first valve body and the positive electrode of the fourth diode D are grounded;

[0021] The first valve body drive circuit includes a fifth triode, a fifth capacitor, a twenty-second resistor, a twenty-eighth resistor, and a thirtieth resistor. The collector of the fifth triode is connected to one end of the thirtieth resistor. The base of the fifth triode is respectively connected to one end of the twenty-second resistor and one end of the twenty-eighth resistor. The emitter of the fifth triode is grounded. The other end of the twenty-second resistor is connected to one end of the fifth capacitor. The other end of the fifth capacitor is connected to the second control circuit. The other end of the thirtieth resistor is connected to the gate of the second MOS transistor. The other end of the twenty-eighth resistor is grounded.

[0022] According to some embodiments of the present utility model, the second valve body control circuit includes a second valve body power supply circuit and a second valve body drive circuit;

[0023] The second valve body power supply circuit includes a third MOS transistor, a third diode D, a second valve body, a twenty-fifth resistor, and a thirty-sixth resistor. The source of the third MOS transistor is connected to both the valve body total control circuit and one end of the twenty-fifth resistor. The gate of the third MOS transistor is connected to the second valve body drive circuit. The drain of the third MOS transistor is connected to the other end of the twenty-fifth resistor, one end of the thirty-sixth resistor, and one end of the second valve body. The other end of the thirty-sixth resistor is connected to the base of the fourth triode. One end of the second valve body is also connected to the negative electrode of the third diode D. The other end of the second valve body is grounded, and the positive electrode of the third diode D is grounded.

[0024] The second valve body drive circuit includes a sixth triode, a sixth capacitor, a twenty-third resistor, a thirty-first resistor, and a thirty-second resistor. The collector of the sixth triode is connected to one end of the thirty-second resistor. The base of the sixth triode is connected to both one end of the twenty-third resistor and one end of the thirty-first resistor. The emitter of the sixth triode is grounded. The other end of the thirty-second resistor is connected to the gate of the third MOS transistor. The other end of the thirty-first resistor is grounded. The other end of the twenty-third resistor is connected to one end of the sixth capacitor. The other end of the sixth capacitor is connected to the second control circuit.

[0025] According to some embodiments of the present invention, the third valve body control circuit includes a third valve body drive circuit, a third valve body comparison circuit, a third valve body power supply circuit, and a third valve body feedback circuit;

[0026] The third valve body drive circuit includes a twenty-seventh resistor, a thirty-fourth resistor, and an eighth capacitor. One end of the twenty-seventh resistor is connected to one end of the thirty-fourth resistor, one end of the eighth capacitor, and the third valve body comparison circuit. The other end of the twenty-seventh resistor is connected to the second control circuit. The other end of the thirty-fourth resistor is grounded. The other end of the eighth capacitor is grounded;

[0027] The third valve body comparison circuit includes a third power supply, a comparator, a seventh capacitor, a seventh triode, a nineteenth resistor, a twentieth resistor, a twenty-sixth resistor, and a thirty-third resistor. The positive input terminal of the comparator is connected to one end of the twenty-seventh resistor. The negative input terminal of the comparator is connected to the feedback circuit. The positive electrode of the comparator is respectively connected to one end of the seventh capacitor, one end of the twentieth resistor, and the third power supply. The other end of the seventh capacitor is grounded. The other end of the twentieth resistor is connected to the output terminal of the comparator. The negative electrode of the comparator is grounded. The output terminal of the comparator is further connected to one end of the twenty-sixth resistor. The other end of the twenty-sixth resistor is respectively connected to the base of the seventh triode and one end of the thirty-third resistor. The other end of the thirty-third resistor is grounded. The collector of the seventh triode is connected to one end of the nineteenth resistor. The other end of the nineteenth resistor is connected to the third valve body power supply circuit. The emitter of the seventh triode is grounded;

[0028] The third valve body power supply circuit includes a fourth MOS transistor, a third valve body, and a second diode D. The gate of the fourth MOS transistor is connected to the other end of the nineteenth resistor. The source of the fourth MOS transistor is connected to the valve body total control circuit. The drain of the fourth MOS transistor is connected to one end of the third valve body. The other end of the third valve body is connected to the third valve body feedback circuit. One end of the third valve body is further connected to the negative electrode of the second diode D. The positive electrode of the second diode D is grounded;

[0029] The third valve body feedback circuit includes a fifth diode D, a ninth capacitor, a thirty-seventh resistor, a thirty-eighth resistor, a fortieth resistor, a forty-first resistor, and a forty-second resistor. One end of the thirty-eighth resistor is respectively connected to the other end of the third valve body and one end of the forty-second resistor. The other end of the thirty-eighth resistor is respectively connected to the positive electrode of the fifth diode D, one end of the ninth capacitor, the thirty-seventh resistor, and one end of the forty-first resistor. The other end of the forty-second resistor is connected to one end of the fortieth resistor. The other end of the fortieth resistor is grounded. The positive electrode of the fifth diode D is grounded. The other end of the ninth capacitor is grounded. The other end of the thirty-seventh resistor is connected to the third power supply. The other end of the forty-first is connected to the second control circuit.

[0030] According to some embodiments of the present utility model, the first control circuit includes a first controller, a first resistor, a second resistor, a third resistor, a second capacitor, and a fourth power supply. The third pin of the first controller is connected to the second control circuit through the third resistor. The fourth pin of the first controller is connected to the second control circuit through the first resistor. The first pin of the first controller is connected to the fourth power supply and one end of the second capacitor respectively. The other end of the second capacitor is grounded. The eighth pin of the first controller is grounded. The fifth pin of the first controller is connected to the second control circuit through the second resistor.

[0031] According to some embodiments of the present utility model, the second control circuit includes a second controller, a third power supply, a third capacitor, and a fourth capacitor. The fifth pin of the second controller is connected to one end of the third capacitor, one end of the fourth capacitor, and the power ground respectively. The tenth pin of the second controller is connected to the other end of the third capacitor, the other end of the fourth capacitor, and the third power supply respectively.

[0032] According to some embodiments of the present utility model, the buck circuit includes a buck chip, a first capacitor, and a fourth resistor. The third pin of the buck chip is connected to the power supply. The second pin of the buck chip is grounded. The first pin of the buck chip is connected to one end of the first capacitor and one end of the fourth resistor respectively. The other end of the first capacitor is grounded. The other end of the fourth resistor is grounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the accompanying drawings.

[0034] Figure 1 It is the system circuit diagram provided by the present utility model in an embodiment;

[0035] Figure 2 It is the system structure diagram provided by the present utility model in an embodiment;

[0036] Figure 3 It is the valve body connection relationship diagram provided by the present utility model in an embodiment;

[0037] Figure 4 It is the valve body monitoring and control circuit diagram provided by the present utility model in an embodiment;

[0038] Figure 5 It is the valve body total control circuit diagram provided by the present utility model in an embodiment;

[0039] Figure 6 It is the first valve detection circuit diagram provided by the present utility model in an embodiment;

[0040] Figure 7 This is the circuit diagram of the first valve body control circuit provided in an embodiment of the present utility model;

[0041] Figure 8 This is the circuit diagram of the second valve body control circuit provided in an embodiment of the present utility model;

[0042] Figure 9 This is the circuit diagram of the third valve body control circuit provided in an embodiment of the present utility model;

[0043] Figure 10 This is the circuit diagram of the first control circuit provided in an embodiment of the present utility model;

[0044] Figure 11 This is the circuit diagram of the second control circuit provided in an embodiment of the present utility model;

[0045] Figure 12 This is the circuit diagram of the step-down circuit provided in an embodiment of the present utility model.

[0046] In the figure: R1 - R42, the first resistor - the forty-second resistor; C1 - C9, the first capacitor - the ninth capacitor; D2 - D5, the second diode - the fifth diode; Q1, the first triode; Q3, the second triode; Q4, the third triode; Q9, the fourth triode; Q10, the fifth triode; Q11, the sixth triode; Q8, the seventh triode; Q2, the first MOS transistor; Q5, the second MOS transistor; Q6, the third MOS transistor; Q7, the fourth MOS transistor; U1, the first controller; U2, the step-down chip; U3, the second controller; U4, the comparator; V1, the first valve body; V2, the second valve body; V3, the third valve body. Detailed implementation manners

[0047] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features, and their effects according to the present utility model as follows.

[0048] Please refer to Figures 1-4 , a valve body monitoring and control system provided in this embodiment includes a first control circuit, a second control circuit, a step-down circuit, and a valve body monitoring and control circuit;

[0049] The step-down circuit is respectively connected to the first control circuit and the second control circuit for providing voltage;

[0050] The first control circuit is connected to the second control circuit for mutually detecting whether each other is operating normally;

[0051] The first control circuit and the second control circuit are respectively connected to the valve body monitoring and control circuit, and are used to monitor and control the operation of the valve body.

[0052] In this embodiment, two control circuits are adopted to control the valve body respectively, and the two control circuits communicate and monitor each other. If one of the control circuits fails, the other control circuit can still control the valve body, increasing the safety of the gas system.

[0053] Please refer to Figures 1-4 , in a further embodiment of the present utility model, the valve body monitoring and control circuit includes a valve body total control circuit, a first valve body control circuit, a second valve body control circuit, and a third valve body control circuit;

[0054] The first control circuit and the second control circuit are respectively connected to the valve body total control circuit;

[0055] The second control circuit and the valve body total control circuit are respectively connected to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit.

[0056] In this embodiment, the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit respectively control the first valve body, the second valve body, and the third valve body. The second control circuit is respectively connected to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit, so that the second control circuit can respectively control the first valve body, the second valve body, and the third valve body. The first control circuit is connected to the valve body total control circuit, and the valve body total control circuit is respectively connected to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit. The first control circuit controls the first valve body, the second valve body, and the third valve body simultaneously through the valve body total control circuit.

[0057] By setting the first control circuit and the second control circuit and allowing them to detect each other's operating states, a redundant design of the system is achieved. This design ensures that even if one of the control circuits fails, the other control circuit can still maintain the normal operation of the system, thereby greatly improving the reliability and stability of the system.

[0058] Please refer to Figure 5 , in a further embodiment of the present utility model, the valve body total control circuit includes a valve body power supply circuit, a valve body drive circuit, a temperature control detection circuit, and a valve power supply detection circuit;

[0059] The valve body power supply circuit includes a first power supply, a second power supply, a first switch S3, a first MOS transistor Q2, and a ninth resistor R9. The first power supply is connected to the source of the first MOS transistor Q2 through the first switch S3. The second power supply is connected to the source of the first MOS transistor Q2 and one end of the ninth resistor R9 respectively. The other end of the ninth resistor R9 is connected to the gate of the first MOS transistor Q2. The drain of the first MOS transistor Q2 is connected to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit respectively.

[0060] Among them, the first power supply and the second power supply supply electrical energy to the valve body. When the first MOS transistor Q2 is in the conducting state, the first power supply and the second power supply supply power from the source of the first MOS transistor Q2 to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit connected to the drain of the first MOS transistor Q2. At the same time, the first power supply and the second power supply are voltage sources with equal voltages. The first switch S3 is used to control whether the first power supply is connected to the source of the first MOS transistor Q2, thereby controlling the magnitude of the current passing through the first MOS transistor Q2. The first MOS transistor Q2 is a PMOS transistor that conducts when the input is at a low level. The ninth resistor R9 is connected between the gate of the first MOS transistor Q2 and the second power supply as a pull-up resistor, ensuring that the gate of the first MOS transistor Q2 maintains a high level state when no low-level signal is input. The first power supply is a 5V voltage source, and the second power supply is a 30V voltage source.

[0061] The valve body drive circuit includes a twelfth resistor R12, a thirteenth resistor R13, a sixteenth resistor R16, and a third triode Q4. The base of the third triode Q4 is connected to one end of the thirteenth resistor R13 and one end of the sixteenth resistor R16 respectively. The collector of the third triode Q4 is connected to one end of the twelfth resistor R12. The emitter of the third triode Q4 is grounded. The other end of the thirteenth resistor R13 is connected to the first control circuit. The other end of the sixteenth resistor R16 is grounded. The other end of the twelfth resistor R12 is connected to the gate of the first MOS transistor Q2.

[0062] Among them, the third triode Q4 is an NPN type triode, whose base is connected to the first control circuit. When the first control circuit transmits a high-level signal to the base of the third triode Q4, the third triode Q4 conducts. The collector of the third triode Q4 is grounded through the emitter of the third triode Q4 and provides a low-level signal to the gate of the first MOS transistor Q2; the twelfth resistor R12 is connected between the gate of the first MOS transistor Q2 and the collector of the third triode Q4 as a current-limiting resistor to prevent damage to the circuit caused by excessive current when the gate of the first MOS transistor Q2 is grounded instantaneously; the thirteenth resistor R13 is a current-limiting resistor connected between the base of the third triode Q4 and the first control circuit to prevent damage to the circuit caused by excessive current; the sixteenth resistor R16 is a pull-down resistor to ensure that the base of the third triode Q4 is in a low-level state when there is no high-level signal input.

[0063] The temperature control detection circuit includes a third power supply, a first triode Q1, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a tenth resistor R10. The collector of the first triode Q1 is respectively connected to one end of the sixth resistor R6 and one end of the seventh resistor R7. The base of the first triode Q1 is connected to one end of the eighth resistor R8 and one end of the tenth resistor R10. The emitter of the first triode Q1 is grounded. The other end of the sixth resistor R6 is connected to the third power supply. The other end of the seventh resistor R7 is connected to the second control circuit. The other end of the eighth resistor R8 is connected to the source of the first MOS transistor Q2. The other end of the tenth resistor R10 is grounded.

[0064] Among them, the third power supply is a 5V voltage source; the first triode Q1 is an NPN-type triode, whose base is connected to the source of the first MOS transistor Q2 and is used to detect whether the first power supply and the second power supply are supplying power to the first MOS transistor Q2 normally. When the first power supply and the second power supply are supplying power normally, a high-level signal is input to the base of the first triode Q1, and the first triode Q1 conducts. The collector of the first triode Q1 is grounded through the emitter and outputs a low-level signal to the second control circuit; when the first power supply and the second power supply stop supplying power, the first triode Q1 is cut off, and the collector of the first triode Q1 outputs a high-level signal to the second control circuit through the third power supply; the seventh resistor R7 is connected between the second control circuit and the collector of the first triode Q1 as a current-limiting resistor to prevent excessive current from damaging the second control circuit when the collector of the first triode Q1 is grounded; the seventh resistor R7 is used as a pull-up resistor to ensure that a high-level signal is output to the second control circuit when there is no low-level signal output from the first triode Q1 to the second control circuit, and at the same time, as a current-limiting resistor, it prevents the third power supply from being directly grounded when the collector of the first triode Q1 is grounded, resulting in excessive current; the tenth resistor R10 is used as a pull-down resistor to ensure that when there is no high-level signal input to the base of the first triode Q1, it maintains a low-level state; the eighth resistor R8 is a current-limiting resistor that limits the current magnitude of the first power supply and the second power supply input to the first triode Q1.

[0065] The valve power supply detection circuit includes a second triode Q3, an eleventh resistor R11, a fourteenth resistor R14, a fifteenth resistor R15, and a seventeenth resistor R17. The collector of the second triode Q3 is respectively connected to one end of the eleventh resistor R11 and one end of the fourteenth resistor R14. The base of the second triode Q3 is respectively connected to one end of the fifteenth resistor R15 and one end of the seventeenth resistor R17. The emitter of the second triode Q3 is grounded. The other end of the eleventh resistor R11 is connected to the third power supply. The other end of the fourteenth resistor R14 is connected to the second control circuit. The other end of the fifteenth resistor R15 is connected to the drain of the first MOS transistor Q2. The other end of the seventeenth resistor R17 is grounded.

[0066] Among them, the second triode Q3 is an NPN-type triode, which is used to detect whether the drain of the first MOS transistor Q2 supplies power normally to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit. When the first MOS transistor Q2 normally supplies power to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit, a high level is input to the base of the second triode Q3, the second triode Q3 conducts, and the collector of the second triode Q3 is grounded through the emitter and sends a low level signal to the second control circuit; when the first MOS transistor Q2 stops supplying power normally to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit, a low level is input to the base of the second triode Q3, the second triode Q3 is cut off, and the collector of the second triode Q3 sends a high level signal to the second control circuit through the power supply; the fifteenth resistor R15 is a current limiting resistor to prevent the current input to the base of the second triode Q3 from being too large; the seventeenth resistor R17 is a pull-down resistor to ensure that the base of the second triode Q3 remains at a low level when no high level signal is input; the fourteenth resistor R14 is a current limiting resistor to prevent the current from being too large when the collector of the second triode Q3 is grounded instantaneously and causing an impact on the second control circuit; the eleventh resistor R11 serves as a pull-up resistor to ensure that a high level signal value is transmitted to the second control circuit when no low level signal is transmitted from the second triode Q3 to the second control circuit, and at the same time serves as a current limiting resistor to prevent the third power supply from being directly grounded and causing too large a current when the collector of the second triode Q3 is grounded.

[0067] In this embodiment, the total valve body control circuit supplies power to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit through the valve body power supply circuit, and at the same time controls the connection and cut-off of the valve body power supply circuit through the valve body drive circuit, detects whether the power supply supplies power to the valve body power supply circuit normally through the temperature control detection circuit, and detects whether the valve body power supply circuit supplies power to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit normally through the valve power supply detection circuit.

[0068] The operating principle of the total valve body control circuit is as follows: The first control circuit sends a high level signal to the valve body drive circuit, and then the total valve body control circuit sends a low level signal to the valve body power supply circuit to connect the valve body power supply circuit, so that the first power supply and the second power supply can supply power to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit through the valve body power supply circuit. When the first power supply and the second power supply supply power to the valve body power supply circuit, a low level signal is sent to the second control circuit through the temperature control detection circuit, and a high level signal is sent otherwise. When the valve body power supply circuit supplies power to the first valve body control circuit, the second valve body control circuit, and the third valve body control circuit, a low level signal is sent to the second control circuit through the valve power supply detection circuit, and a high level signal is sent otherwise.

[0069] Please refer to Figure 3 、Figure 6 In a further embodiment of the present utility model, the valve body monitoring and control circuit further includes a first valve detection circuit. The first valve detection circuit includes a third power supply, a fourth triode Q9, a twenty-fourth resistor R24, a twenty-ninth resistor R29, and a thirty-ninth resistor R39. The collector of the fourth triode Q9 is respectively connected to one end of the twenty-fourth resistor R24 and one end of the twenty-ninth resistor R29. The base of the fourth triode Q9 is respectively connected to one end of the thirty-ninth resistor R39, the first valve body control circuit, and the second valve body control circuit. The emitter of the fourth triode Q9 is grounded. The other end of the twenty-fourth resistor R24 is connected to the third power supply. The other end of the twenty-ninth resistor R29 is connected to the second control circuit. The other end of the thirty-ninth resistor R39 is grounded.

[0070] Among them, the third power supply is a 5V voltage source; the fourth triode Q9 is an NPN type triode, and its base is respectively connected to the first valve body control circuit and the second valve body control circuit to detect whether the first valve body control circuit and the second valve body control circuit are normal in supplying power to the first valve body V1 and the second valve body V2. When at least one of the valve bodies is powered, a high-level signal is sent to the base of the fourth triode Q9, and the fourth triode Q9 conducts. The collector of the fourth triode Q9 is grounded through the emitter and sends a low-level signal to the second control circuit; the thirty-ninth resistor R39 is a pull-down resistor to ensure that the base of the fourth triode Q9 maintains a low-level state when there is no high-level signal input; the twenty-ninth resistor R29 is a current-limiting resistor to avoid excessive current when the collector of the fourth triode Q9 is grounded instantaneously, which may damage the second control circuit; the twenty-fourth resistor is a pull-up resistor to ensure that when the fourth triode Q9 has no low-level signal output to the second control circuit, a high-level signal is output to the second control circuit, and at the same time, as a current-limiting resistor, it avoids excessive current when the collector of the fourth triode Q9 is grounded and the third power supply is directly grounded.

[0071] In this embodiment, the valve body monitoring and control circuit further includes a first valve detection circuit for detecting whether the first valve body control circuit and the second valve body control circuit are normal in supplying power to the first valve body V1 and the second valve body V2. When at least one of the first valve body V1 and the second valve body V2 is powered, the first valve detection circuit outputs a low-level signal to the second control circuit. When neither the first valve body V1 nor the second valve body V2 is powered, the first valve detection circuit outputs a high-level signal to the second control circuit.

[0072] Please refer to Figure 7 In a further embodiment of the present utility model, the first valve body control circuit includes a first valve body power supply circuit and a first valve body drive circuit;

[0073] The first valve body power supply circuit includes a second MOS transistor Q5, a fourth diode D4, a first valve body V1, an eighteenth resistor R18, a twenty-first resistor R21, and a thirty-fifth resistor R35. The source of the second MOS transistor Q5 is respectively connected to one end of the eighteenth resistor R18, one end of the twenty-first resistor R21, and the valve body total control circuit. The gate of the second MOS transistor Q5 is respectively connected to the other end of the eighteenth resistor R18 and the first valve body drive circuit. The drain of the second MOS transistor Q5 is respectively connected to the other end of the twenty-first resistor R21, one end of the thirty-fifth resistor R35, and one end of the first valve body V1. The other end of the thirty-fifth resistor R35 is connected to the base of the fourth transistor Q9. One end of the first valve body V1 is also connected to the negative electrode of the fourth diode D4. The other end of the first valve body V1 and the positive electrode of the fourth diode D4 are grounded.

[0074] Among them, the second MOS transistor Q5 is a PMOS transistor that conducts when the level is low. Its source is connected to the valve body total control circuit, and its drain is connected to the first valve body V1, used to control the power supply of the first valve body V1. The gate of the second MOS transistor Q5 is connected to the first valve body drive circuit. When receiving a low-level signal from the first valve body drive circuit, the second MOS transistor Q5 conducts, and the valve body total control circuit supplies power to the first valve body V1 through the second MOS transistor Q5. The eighteenth resistor R18 is connected between the gate and the source of the second MOS transistor Q5 as a pull-up resistor to ensure that the gate of the second MOS transistor is at a high level when not receiving a low-level signal from the first valve body drive circuit. The fourth diode D4 is connected in parallel with both ends of the first valve body V1 to prevent the first valve body V1 from generating a reverse voltage when powered off and protect other components in the circuit. The twenty-first resistor R21 and the thirty-fifth resistor R35 are current-limiting resistors to ensure the stable operation of the circuit and the safety of components.

[0075] The first valve body drive circuit includes a fifth transistor Q10, a fifth capacitor C5, a twenty-second resistor R22, a twenty-eighth resistor R28, and a thirtieth resistor R30. The collector of the fifth transistor Q10 is connected to one end of the thirtieth resistor R30. The base of the fifth transistor Q10 is respectively connected to one end of the twenty-second resistor R22 and one end of the twenty-eighth resistor R28. The emitter of the fifth transistor Q10 is grounded. The other end of the twenty-second resistor R22 is connected to one end of the fifth capacitor C5. The other end of the fifth capacitor C5 is connected to the second control circuit. The other end of the thirtieth resistor R30 is connected to the gate of the second MOS transistor Q5. The other end of the twenty-eighth resistor R28 is grounded.

[0076] Among them, the fifth triode Q10 is an NPN-type triode, which is used to control the conduction and cut-off of the second MOS transistor Q5. The base of the fifth triode Q10 is connected to the second control circuit to receive a control signal, that is, a high-level signal, from the second control circuit. The emitter of the fifth triode Q10 is grounded, and the base of the fifth triode Q10 is connected to the gate of the second MOS transistor Q5. When the fifth triode Q10 receives a high-level signal from the second control circuit, the fifth triode Q10 conducts and transmits a low-level signal to the gate of the second MOS transistor Q5; the twenty-eighth resistor R28 is a pull-down resistor to ensure that the base of the fifth triode Q10 is in a low-level state when it does not receive a high-level signal from the second control circuit; the twenty-second resistor R22 and the thirtieth resistor R30 are current-limiting resistors, which are used to limit the current in the circuit to ensure the stable operation of the circuit and the safety of components; the fifth capacitor C5 is used for filtering to smooth the control signal of the base of the fifth triode Q10 and reduce signal interference.

[0077] In this embodiment, the first valve body control circuit includes a first valve body power supply circuit and a first valve body drive circuit. The first valve body drive circuit is connected to the second control circuit. When the first valve body drive circuit receives a high-level signal from the second control circuit, the fifth triode Q10 in the first valve body drive circuit conducts and transmits a low-level signal to the first valve body power supply circuit. When the first valve body power supply circuit receives the low-level signal from the first valve body drive circuit, the second MOS transistor Q5 in the first valve body drive circuit conducts to supply power to the first valve body V1.

[0078] Please refer to Figure 8 , in a further embodiment of the present utility model, the second valve body control circuit includes a second valve body power supply circuit and a second valve body drive circuit;

[0079] The second valve body power supply circuit includes a third MOS transistor Q6, a third diode D3, a second valve body V2, a twenty-fifth resistor R25, and a thirty-sixth resistor R36. The source of the third MOS transistor Q6 is respectively connected to the valve body total control circuit and one end of the twenty-fifth resistor R25. The gate of the third MOS transistor Q6 is connected to the second valve body drive circuit. The drain of the third MOS transistor Q6 is respectively connected to the other end of the twenty-fifth resistor R25, one end of the thirty-sixth resistor R36, and one end of the second valve body V2. The other end of the thirty-sixth resistor R36 is connected to the base of the fourth triode Q9. One end of the second valve body V2 is also connected to the negative electrode of the third diode D3. The other end of the second valve body V2 is grounded, and the positive electrode of the third diode D3 is grounded.

[0080] Among them, the third MOS transistor Q6 is a PMOS transistor that conducts when the input is low. Its source is connected to the overall valve body control circuit, and its drain is connected to the second valve body V2, used to control the power supply of the second valve body V2. The gate of the third MOS transistor Q6 is connected to the second valve body drive circuit. When receiving a low-level signal from the second valve body drive circuit, the third MOS transistor Q6 conducts, and the overall valve body control circuit supplies power to the second valve body V2 through the third MOS transistor Q6; the third diode D3 is connected in parallel across the two ends of the second valve body V2, used to prevent the second valve body V2 from generating a reverse voltage when power is cut off, protecting other components in the circuit; the twenty-fifth resistor R25 and the thirty-sixth resistor R36 are current-limiting resistors, ensuring the stable operation of the circuit and the safety of components.

[0081] The second valve body drive circuit includes a sixth triode Q11, a sixth capacitor C6, a twenty-third resistor R23, a thirty-first resistor R31, and a thirty-second resistor R32. The collector of the sixth triode Q11 is connected to one end of the thirty-second resistor R32. The base of the sixth triode Q11 is respectively connected to one end of the twenty-third resistor R23 and one end of the thirty-first resistor R31. The emitter of the sixth triode Q11 is grounded. The other end of the thirty-second resistor R32 is connected to the gate of the third MOS transistor Q6. The other end of the thirty-first resistor R31 is grounded. The other end of the twenty-third resistor R32 is connected to one end of the sixth capacitor C6. The other end of the sixth capacitor C6 is connected to the second control circuit.

[0082] Among them, the sixth triode Q11 is an NPN-type triode, used to control the conduction and cut-off of the third MOS transistor Q6. The base of the sixth triode Q11 is connected to the second control circuit, used to receive a control signal (i.e., a high-level signal) from the second control circuit. The emitter of the sixth triode Q11 is grounded. The base of the sixth triode Q11 is connected to the gate of the third MOS transistor Q6. When the sixth triode Q11 receives a high-level signal from the second control circuit, the sixth triode Q11 conducts and transmits a low-level signal to the gate of the third MOS transistor Q5; the thirty-first resistor R31 is a pull-down resistor, ensuring that the base of the sixth triode Q11 is in a low-level state when not receiving a high-level signal from the second control circuit; the twenty-third resistor R23 and the thirty-second resistor R32 are current-limiting resistors, used to limit the current in the circuit, ensuring the stable operation of the circuit and the safety of components; the sixth capacitor C6 is used for filtering, smoothing the control signal at the base of the sixth triode Q11, and reducing signal interference.

[0083] In this embodiment, the second valve body control circuit includes a second valve body power supply circuit and a second valve body drive circuit. The second valve body drive circuit is connected to the second control circuit. When the second valve body drive circuit receives a high-level signal from the second control circuit, the sixth triode Q11 in the second valve body drive circuit conducts and transmits a low-level signal to the second valve body power supply circuit. When the second valve body power supply circuit receives the low-level signal from the second valve body drive circuit, the third MOS transistor Q6 in the second valve body drive circuit conducts to supply power to the second valve body V2.

[0084] Please refer to Figure 9 , in a further embodiment of the present utility model, the third valve body control circuit includes a third valve body drive circuit, a third valve body comparison circuit, a third valve body power supply circuit, and a third valve body feedback circuit;

[0085] The third valve body drive circuit is used for the third valve body control circuit to receive the control signal from the second control circuit. The third valve body drive circuit includes a twenty-seventh resistor R27, a thirty-fourth resistor R34, and an eighth capacitor C8. One end of the twenty-seventh resistor R27 is respectively connected to one end of the thirty-fourth resistor R34, one end of the eighth capacitor C8, and the third valve body comparison circuit. The other end of the twenty-seventh resistor R27 is connected to the second control circuit. The other end of the thirty-fourth resistor R34 is grounded. The other end of the eighth capacitor C8 is grounded.

[0086] Among them, the twenty-seventh resistor R27 is a current-limiting resistor to protect the input end of the comparator U4 from being damaged by excessive current; the thirty-fourth resistor R34 and the eighth capacitor C8 form an RC filter circuit to smooth the signal from the second control circuit and reduce interference.

[0087] The third valve body comparison circuit includes a third power supply, a comparator U4, a seventh capacitor C7, a seventh triode Q8, a nineteenth resistor R19, a twentieth resistor R20, a twenty-sixth resistor R26, and a thirty-third resistor R33. The positive input end of the comparator U4 is connected to one end of the twenty-seventh resistor R27. The negative input end of the comparator U4 is connected to the feedback circuit. The positive pole of the comparator U4 is respectively connected to one end of the seventh capacitor C7, one end of the twentieth resistor R20, and the third power supply. The other end of the seventh capacitor C7 is grounded. The other end of the twentieth resistor R20 is connected to the output end of the comparator U4. The negative pole of the comparator U4 is grounded. The output end of the comparator U4 is also connected to one end of the twenty-sixth resistor R26. The other end of the twenty-sixth resistor R26 is respectively connected to the base of the seventh triode Q8 and one end of the thirty-third resistor R33. The other end of the thirty-third resistor R33 is grounded. The collector of the seventh triode Q8 is connected to one end of the nineteenth resistor R19. The other end of the nineteenth resistor R19 is connected to the third valve body power supply circuit. The emitter of the seventh triode Q8 is grounded.

[0088] Among them, the comparator U4 compares the signals from the third valve body drive circuit and the signals from the third valve body feedback circuit. According to the comparison result, it outputs control signals with different duty cycles to the seventh triode Q8, further controlling the power supply to the third valve body V3 in the third valve body power supply circuit. The seventh triode Q8 is used to control the third valve body power supply circuit. The seventh triode Q8 is an NPN type triode. The base of the seventh triode Q8 is connected to the output terminal of the comparator U4. The collector of the seventh triode Q8 is connected to the third valve body power supply circuit. The emitter of the seventh triode Q8 is grounded. When the seventh triode Q8 receives a high-level signal from the comparator U4, the seventh triode Q8 conducts and sends a low-level signal to the third valve body power supply circuit. The thirty-third resistor R33 is a pull-down resistor to ensure that the base of the seventh triode Q8 remains at a low level when it does not receive a high-level signal from the comparator U4. The nineteenth resistor R19 is a current-limiting resistor to protect the collector of the seventh triode Q8 from excessive current damage. The twentieth resistor R20 and the twenty-sixth resistor R26 form a bias and feedback network to ensure that the comparator U4 operates within the normal working range. The seventh capacitor C7 is a filter capacitor used to reduce the voltage fluctuation at the positive terminal of the comparator U4.

[0089] The third valve body power supply circuit includes the fourth MOS transistor Q7, the third valve body V3, and the second diode D2. The gate of the fourth MOS transistor Q7 is connected to the other end of the nineteenth resistor R19. The source of the fourth MOS transistor Q7 is connected to the valve body total control circuit. The drain of the fourth MOS transistor Q7 is connected to one end of the third valve body V3. The other end of the third valve body V3 is connected to the third valve body feedback circuit. One end of the third valve body V3 is also connected to the negative electrode of the second diode D2. The positive electrode of the second diode D2 is grounded.

[0090] Among them, the fourth MOS transistor is a PMOS transistor that conducts when it is at a low level and is used to control the power supply to the third valve body V3. The source of the fourth MOS transistor Q7 is connected to the valve body total control circuit. The drain of the fourth MOS transistor Q7 is connected to one end of the third valve body V3. When the gate of the fourth MOS transistor Q7 receives a low-level signal transmitted from the third valve body comparison circuit, that is, the collector of the seventh triode Q8, the fourth MOS transistor Q7 conducts, and the valve body total control circuit supplies power to the third valve body V3 through the fourth MOS transistor Q7. The second diode D2 is connected in parallel across the two ends of the third valve body V3 and is used to prevent the third valve body V3 from generating a reverse voltage when it is powered off, protecting other components in the circuit.

[0091] The third valve body feedback circuit includes the fifth diode D5, the ninth capacitor C9, the thirty-seventh resistor R37, the thirty-eighth resistor R38, the fortieth resistor R40, the forty-first resistor R41, and the forty-second resistor R42. One end of the thirty-eighth resistor R38 is connected to the other end of the third valve body V3 and one end of the forty-second resistor R42 respectively. The other end of the thirty-eighth resistor R38 is connected to the positive electrode of the fifth diode D5, one end of the ninth capacitor C9, the thirty-seventh resistor R37, and one end of the forty-first resistor R41 respectively. The other end of the forty-second resistor R42 is connected to one end of the fortieth resistor R40. The other end of the fortieth resistor R40 is grounded. The positive electrode of the fifth diode D5 is grounded. The other end of the ninth capacitor C9 is grounded. The other end of the thirty-seventh resistor R37 is connected to the third power supply. The other end of the forty-first resistor R41 is connected to the second control circuit.

[0092] Among them, the third power supply is a 5V voltage source; the forty-first resistor R41 is connected to the second control circuit. The third valve body feedback circuit feeds back whether the third valve body V3 is operating normally to the second control circuit through the forty-first resistor R41. And the forty-first resistor R41 serves as a current resistor to protect the components in the second control circuit; the fifth diode D5 is a protection diode to prevent the voltage in the third valve body feedback circuit from being greater than the voltage of the third power supply, that is, greater than 5V, to protect the components in the circuit; the ninth capacitor is a filtering capacitor to filter out the unnecessary high-frequency components in the third valve body feedback circuit to ensure the purity and stability of the feedback signal.

[0093] In this embodiment, the third valve body V3 can be a proportional valve. The third valve body control circuit includes a third valve body drive circuit, a third valve body comparison circuit, a third valve body power supply circuit, and a third valve body feedback circuit; the third valve body drive circuit is used to receive the control signal of the second control circuit and transmit the control signal to the third valve body comparison circuit. The third valve body feedback circuit is used to feed back the working state signal of the third valve body V3 to the second control circuit and the third valve body comparison circuit. The comparator U4 in the third valve body comparison circuit compares the control signal provided by the third valve body drive circuit and the working state signal provided by the third valve body feedback circuit and generates a square wave signal with different duty cycles to the seventh triode Q8. The seventh triode Q8 controls the on and off of the fourth MOS transistor Q7 in the third valve body power supply circuit through the square wave signal of the comparator U4, thereby controlling the power supply of the proportional valve third valve body V3.

[0094] Please refer to Figure 10, in a further embodiment of the present utility model, the first control circuit includes a first controller U1, a first resistor R1, a second resistor R2, a third resistor R3, a second capacitor C2, and a fourth power supply. The third pin of the first controller U1 is connected to the second control circuit through the third resistor R3. The fourth pin of the first controller U1 is connected to the second control circuit through the first resistor R1. The first pin of the first controller U1 is connected to the fourth power supply and one end of the second capacitor C2 respectively. The other end of the second capacitor C2 is grounded. The eighth pin of the first controller U1 is grounded. The fifth pin of the first controller U1 is connected to the second control circuit through the second resistor R2. The fourth power supply is a 5V voltage source provided by the buck circuit.

[0095] In this embodiment, the third pin and the fourth pin of the first controller U1 are connected to the second controller U2 for signal transmission between the first controller U1 and the second controller U2. The second capacitor C2 is a filtering capacitor for providing a stable power supply voltage for the first controller U1.

[0096] Please refer to Figure 11 , in a further embodiment of the present utility model, the second control circuit includes a second controller U3, a third power supply, a third capacitor C3, and a fourth capacitor C4. The fifth pin of the second controller U3 is connected to one end of the third capacitor C3, one end of the fourth capacitor C4, and the power ground respectively. The tenth pin of the second controller U3 is connected to the other end of the third capacitor C3, the other end of the fourth capacitor C4, and the fourth power supply respectively.

[0097] In this embodiment, the third power supply is a 5V voltage source. The third capacitor C3 and the fourth capacitor C4 are respectively connected between the fifth pin and the tenth pin of the second controller U3 to play a filtering role, helping to provide a stable power supply voltage and reducing the noise in the circuit.

[0098] Please refer to Figure 12 , in a further embodiment of the present utility model, the buck circuit includes a buck chip U2, a first capacitor C1, and a fourth resistor R4. The third pin of the buck chip U2 is connected to the power supply. The second pin of the buck chip U2 is grounded. The first pin of the buck chip U2 is connected to one end of the first capacitor C1 and one end of the fourth resistor R4 respectively. The other end of the first capacitor C1 is grounded. The other end of the fourth resistor R4 is grounded.

[0099] Among them, the first capacitor C1 and the fourth resistor R4 form a buck circuit to provide a stable power supply voltage for the first control circuit, reduce the noise in the circuit, and enhance the stability of the power supply voltage.

[0100] In this embodiment, the buck circuit provides a stable 5V power supply for the first control circuit. The first control circuit and the second control circuit are powered by different power supplies, avoiding the common cause failure of the control circuit due to power supply failure and increasing the safety and reliability of the circuit.

[0101] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A valve body monitoring and control system, characterized in that: It includes a first control circuit, a second control circuit, a voltage reduction circuit and a valve body monitoring control circuit; The step-down circuit is connected to the first control circuit and is used to provide power to the first control circuit; The valve body monitoring control circuit includes a valve body total control circuit, a first valve body control circuit, a second valve body control circuit and a third valve body control circuit; The first control circuit and the second control circuit are respectively connected to the valve body total control circuit; The second control circuit and the valve body total control circuit are respectively connected to the first valve body control circuit, the second valve body control circuit and the third valve body control circuit; The second control circuit can send valve body control signals to the first valve body control circuit, the second valve body control circuit and the third valve body control circuit respectively to control the operation of the valve body; The first control circuit can control the power supply of the valve body monitoring control circuit by sending a power switch signal to the valve body main control circuit.

2. A valve body monitoring and control system according to claim 1, characterized in that: The valve body overall control circuit includes a valve body power supply circuit, a valve body drive circuit, a temperature control detection circuit and a valve power supply detection circuit; The valve body power supply circuit comprises a first power supply, a second power supply, a first switch (S3) and a first MOS tube (Q2), the first MOS tube (Q2) being a P-type MOS tube, the first power supply being connected to the source of the first MOS tube (Q2) through the first switch (S3), the second power supply being connected to the source of the first MOS tube (Q2) and the gate of the first MOS tube (Q2), respectively, and the drain of the first MOS tube (Q2) being connected to the first valve body control circuit, the second valve body control circuit and the third valve body control circuit respectively; The valve body drive circuit comprises a third transistor (Q4), the third transistor (Q4) is an NPN transistor, the base of the third transistor (Q4) receives the valve body drive signal from the first control circuit, the collector of the third transistor (Q4) is connected to the gate of the first MOS transistor (Q2), and the emitter of the third transistor (Q4) is grounded; The temperature control detection circuit comprises a third power supply and a first transistor (Q1), the first transistor (Q1) is an NPN transistor, the collector of the first transistor (Q1) is connected to the first power supply and the second control circuit respectively, the base of the first transistor (Q1) is connected to the source of the first MOS transistor (Q2), and the emitter of the first transistor (Q1) is grounded; The valve power supply detection circuit comprises a second transistor (Q3) and a third power supply, the second transistor (Q3) is an NPN transistor, the collector of the second transistor (Q3) is respectively connected to the third power supply and the second control circuit, the base of the second transistor (Q3) is connected to the drain of the first MOS tube (Q2), and the emitter of the second transistor (Q3) is grounded.

3. A valve body monitoring and control system according to claim 1, characterized in that: The valve body monitoring control circuit also includes a first valve detection circuit, which includes a third power supply and a fourth transistor (Q9). The fourth transistor (Q9) is an NPN transistor. The collector of the fourth transistor (Q9) is respectively connected to the third power supply and the second control circuit, the base of the fourth transistor (Q9) is respectively connected to the first valve body control circuit and the second valve body control circuit, and the emitter of the fourth transistor (Q9) is grounded.

4. A valve body monitoring and control system according to claim 3, characterized in that: The first valve body control circuit includes a first valve body power supply circuit and a first valve body drive circuit; The first valve body power supply circuit comprises a second MOS tube (Q5) and a first valve body (V1), the second MOS tube (Q5) is a P-type MOS tube, the source of the second MOS tube (Q5) is connected to the valve body overall control circuit, the gate of the second MOS tube (Q5) is connected to the first valve body drive circuit, the drain of the second MOS tube (Q5) is connected to one end of the first valve body (V1), and the other end of the first valve body (V1) is grounded; The first valve body drive circuit comprises a fifth transistor (Q10), the fifth transistor (Q10) is an NPN transistor, the base of the fifth transistor (Q10) is connected to the second control circuit, the collector of the fifth transistor (Q10) is connected to the gate of the second MOS transistor (Q5), and the emitter of the fifth transistor (Q10) is grounded.

5. A valve body monitoring and control system according to claim 3, characterized in that: The second valve body control circuit includes a second valve body power supply circuit and a second valve body drive circuit; The second valve body power supply circuit comprises a third MOS tube (Q6) and a second valve body (V2), the third MOS tube (Q6) is a P-type MOS tube, the source of the third MOS tube (Q6) is connected to the valve body overall control circuit, the gate of the third MOS tube (Q6) is connected to the second valve body drive circuit, the drain of the third MOS tube (Q6) is connected to one end of the second valve body (V2), and the other end of the second valve body (V2) is grounded; The second valve body drive circuit comprises a sixth transistor (Q11), the sixth transistor (Q11) is an NPN transistor, the collector of the sixth transistor (Q11) is connected to the gate of the third MOS transistor (Q6), the emitter of the sixth transistor (Q11) is grounded, and the base of the sixth transistor (Q11) is connected to the second control circuit.

6. A valve body monitoring and control system according to claim 1, characterized in that: The third valve body control circuit includes a third valve body comparison circuit and a third valve body power supply circuit; The third valve body comparison circuit comprises a third power supply and a comparator (U4), the positive input end of the comparator (U4) is connected to the second control circuit, the negative input end of the comparator (U4) is connected to the third valve body power supply circuit, and the output end of the comparator (U4) is connected to the third valve body power supply circuit; The third valve body power supply circuit comprises a fourth MOS tube (Q7) and a third valve body (V3); the fourth MOS tube (Q7) is a P-type MOS tube; the source of the fourth MOS tube (Q7) is connected to the valve body overall control circuit; the gate of the fourth MOS tube (Q7) is connected to the output end of the comparator (U4); the drain of the fourth MOS tube (Q7) is connected to one end of the third valve body (V3); and the other end of the third valve body (V3) is connected to the reverse input end of the comparator (U4).

7. A valve body monitoring and control system according to claim 1, characterized in that: The first control circuit comprises a first controller (U1) and a fourth power supply, the third pin and the fourth pin of the first controller (U1) are both connected to the second control circuit, and the first pin of the first controller (U1) is connected to the fourth power supply.

8. A valve body monitoring and control system according to claim 1, characterized in that: The second control circuit comprises a second controller (U3), a third power supply, a third capacitor (C3) and a fourth capacitor (C4); a fifth pin of the second controller (U3) is respectively connected to one end of the third capacitor (C3), one end of the fourth capacitor (C4) and a power ground; and a tenth pin of the second controller (U3) is respectively connected to the other end of the third capacitor (C3), the other end of the fourth capacitor (C4) and the third power supply.

9. A valve body monitoring and control system according to claim 1, characterized in that: The step-down circuit comprises a step-down chip (U2), a first capacitor (C1) and a fourth resistor (R4), wherein the third pin of the step-down chip (U2) is connected to a power supply, the second pin of the step-down chip (U2) is grounded, the first pin of the step-down chip (U2) is respectively connected to one end of the first capacitor (C1) and one end of the fourth resistor (R4), the other end of the first capacitor (C1) is grounded, and the other end of the fourth resistor (R4) is grounded.

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