Valve control circuit, PCB and valve control device

Abstract

The utility model relates to the technical field of signal control, and discloses a valve control circuit, a PCB (Printed Circuit Board) and a valve control device, a signal input module in the valve control circuit can access an active signal according to the actual demand, or simulate the level condition change required by passive control through specific pin connection operation; the active signal is precisely processed through the signal processing module, and the level change of the simulation passive control is adaptively guided through the protection module, so that the active signal or the level change of the simulation passive control is converted into a control signal which can be effectively utilized by the valve control module; through close cooperative work of all the modules, the valve control circuit compatible with various input forms is realized, and the universality and adaptability of the valve control circuit are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to signal control technical field, especially relate to a valve control circuit, PCB board and valve control device. BACKGROUND

[0002] In the field of industrial control and building control, the valve control box is the key to ensure the normal operation of the system. It is responsible for regulating and controlling the fluid link in industrial production and the valve of the building ventilation, water supply and drainage system.

[0003] However, the traditional valve control box has serious drawbacks. Specifically, the control signal compatibility of the traditional valve is poor, and it can only be fixedly adapted to one of passive, direct current control signal, alternating current control signal. However, the complexity of industrial control and building control scenes determines the diversity of signal sources. Different brands, models of valve equipment and control systems working with them use different signal specifications. Once the signal is not compatible, the traditional valve cannot work normally. In actual application, on-site wiring construction is often required, which not only increases the cost but also wastes time, seriously affecting work efficiency and system stability. SUMMARY

[0004] The utility model aims at improving at least one technical problem in the background art.

[0005] The utility model provides a valve control circuit, including: signal input module, signal processing module, protection module and valve control module, signal input module is connected with valve control module through signal processing module and protection module respectively,

[0006] The signal input module is used for inputting active control signal or analog passive control level state change to the valve control module. The signal processing module is used for processing the multiple active control signals input by the signal input module and guiding the active control signals to the valve control module. The protection module is used for guiding the corresponding level change to the valve control module when the signal input module simulates the passive control level state change. The valve control module is used for receiving the control signal converted by the active control signal input by the signal processing module, or responding to the level change guided by the protection module, and converting it into actual valve action.

[0007] The beneficial effects of the first aspect embodiment of the utility model lie in that the signal input module in the valve control circuit can connect active signals according to actual requirements, or simulate passive control required level condition changes through specific pin connection operation, then accurately process the active signals through the signal processing module, and the protection module adaptively guides the level changes of the simulated passive control, so as to convert the active signals or the level changes of the simulated passive control into control signals which can be effectively utilized by the valve control module; through the close collaborative work of the modules, the valve control circuit compatible with multiple input forms is realized, and the versatility and adaptability of the valve control circuit are greatly improved.

[0008] As some sub-schemes of the above technical scheme, the valve control circuit further comprises a toggle switch K1; the toggle switch K1 is used for connecting the signal input module, the signal processing module and the protection module.

[0009] As some sub-schemes of the above technical scheme, the signal input module comprises a first input terminal J1 and a second input terminal J2; the first input terminal J1 and the second input terminal J2 are respectively connected with the toggle switch K1; the first input terminal J1 is used for outputting valve opening control active signals, or simulating passive control level state changes required by valve opening control; the second input terminal J2 is used for outputting valve closing control active signals, or simulating passive control level state changes required by valve closing control.

[0010] As some sub-schemes of the above technical scheme, the signal processing module comprises a valve opening signal processing unit and a valve closing signal processing unit;

[0011] The valve opening signal processing unit comprises a first diode D1, a first capacitor C1, a fourth resistor R4, a fifth diode D5, a fifth resistor R5, a third resistor R3 and a second triode Q2; the anode of the first diode D1 is connected with the toggle switch K1, the cathode of the first diode D1 is connected with one end of the first capacitor C1, one end of the fourth resistor R4 and the cathode of the fifth diode D5, the other end of the first capacitor C1 is grounded, the other end of the fourth resistor R4 is connected with the anode of the fifth diode D5 through the fifth resistor R5; the anode of the fifth diode D5 is connected with one end of the third resistor R3; the other end of the third resistor R3 and the base of the second triode Q2 are connected; the emitter of the second triode Q2 is grounded, and the collector of the second triode Q2 is connected with the valve control module;

[0012] The valve closing signal processing unit comprises a third diode D3, a second capacitor C2, a ninth resistor R9, a sixth diode D6, a tenth resistor R10, an eighth resistor R8 and a fourth triode Q4; the positive electrode of the third diode D3 is connected with the toggle switch K1, the negative electrode of the third diode D3 is connected with one end of the second capacitor C2, one end of the ninth resistor R9 and the negative electrode of the sixth diode D6, the other end of the second capacitor C2 is grounded, the other end of the ninth resistor R9 is connected with the anode of the sixth diode D6 through the tenth resistor R10; the anode of the sixth diode D6 is connected with one end of the eighth resistor R8; the other end of the eighth resistor R8 and the base of the fourth triode Q4 are connected; the emitter of the fourth triode Q4 is grounded, and the collector of the fourth triode Q4 is connected with the valve control module.

[0013] As some sub-schemes of the above technical scheme, the valve control module comprises a valve opening control unit and a valve closing control unit.

[0014] The valve opening control unit comprises a first resistor R1, a second resistor R2, a first triode Q1 and a valve opening relay RL1; the collector of the first triode Q1 is connected with the valve opening relay RL1, the base of the first triode Q1 is connected with one end of the second resistor R2, the emitter of the first triode Q1 is connected with one end of the first resistor R1, the other end of the second resistor R2 and the other end of the first resistor R1 are connected with the collector of the second triode Q2.

[0015] The valve closing control unit comprises a sixth resistor R6, a seventh resistor R7, a third triode Q3 and a valve closing relay RL2; the collector of the third triode Q3 is connected with the valve closing relay RL2, the base of the third triode Q3 is connected with one end of the seventh resistor R7, the emitter of the third triode Q3 is connected with one end of the sixth resistor R6, the other end of the seventh resistor R7 and the other end of the sixth resistor R6 are connected with the collector of the fourth triode Q4.

[0016] As some sub-schemes of the above technical scheme, the protection module comprises a second diode D2 and a fourth diode D4; the negative electrode of the second diode D2 is connected with the toggle switch K1, and the positive electrode of the second diode D2 is connected with the valve control module; the negative electrode of the fourth diode D4 is connected with the toggle switch K1, and the positive electrode of the fourth diode D4 is connected with the valve control module.

[0017] As some sub-schemes of the above technical scheme, the valve opening relay and the valve closing relay are electronic power relays.

[0018] As some sub-schemes of the above technical solutions, a working power supply VCC is further included, which is connected with the valve control module; the working power supply VCC is used for providing working voltage for the valve control circuit.

[0019] The second aspect embodiment of the utility model provides a PCB, which is printed with the valve control circuit according to any one of the above.

[0020] The PCB according to the second aspect embodiment of the utility model has the corresponding beneficial effects due to the valve control circuit according to the above technical solutions.

[0021] The third aspect embodiment of the utility model provides a valve control device, which is realized by the valve control circuit according to any one of the above.

[0022] The valve control device according to the third aspect embodiment of the utility model has the corresponding beneficial effects due to the valve control circuit according to the above technical solutions. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0024] Figure 1 A circuit block diagram of the valve control circuit provided by the utility model is shown in the following figure.

[0025] Figure 2 A circuit principle diagram of the valve control circuit provided by the utility model is shown in the following figure.

[0026] In the drawings: 1 - signal input module; 2 - signal processing module; 3 - protection module; 4 - valve control module. DETAILED DESCRIPTION

[0027] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as a limitation on the utility model.

[0028] In the description of the utility model, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] In the description of the utility model, the meaning of several is indefinite quantity, the meaning of multiple is two or more, greater than, less than, exceed and the like are understood as not including the number, above, below, within and the like are understood as including the number.If it is described to first, second is only used for distinguishing technical features for the purpose, and can not be understood as indicating or suggesting relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.The and / or appearing in the whole text indicates three parallel schemes, for example, A and / or B indicates the scheme satisfied by A, the scheme satisfied by B or the scheme satisfied by A and B simultaneously.

[0030] In the description of the utility model, if there is a short sentence containing multiple parallel features, the restrictive phrase therein is limited to the nearest feature, for example: B, C and D are connected to E, which means that B is arranged on A, E is connected to D, and C is not limited;However, for restrictive phrases indicating the relationship between features, such as "interval arrangement" or "annular arrangement", etc., it does not belong to this category.If the restrictive phrase is preceded by the word "all", it means that all the features in the short sentence are limited, for example, B, C and D are arranged on A, which means that B, C and D are arranged on A.Omitting the subject of the sentence, the omitted subject is the subject of the previous sentence, that is, A is provided with B, including C, which means that A is provided with B, and A includes C.

[0031] In the description of the utility model, unless otherwise specified, the words such as setting, installation and connection should be understood in a broad sense, and the skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0032] The embodiments of the utility model will be described below. Figure 1 and Figure 2 The embodiments of the utility model will be described below.

[0033] The valve control circuit in the embodiment comprises a signal input module 1, a signal processing module 2, a protection module 3 and a valve control module 4; the signal input module 1 is connected with the valve control module 4 through the signal processing module 2 and the protection module 3 respectively;

[0034] The signal input module 1 is used for inputting active control signals or analog passive control level state changes to the valve control module 4; the signal processing module 2 is used for processing various active control signals input by the signal input module 1 and guiding the active control signals to the valve control module 4; the protection module 3 is used for guiding corresponding level changes to the valve control module 4 when the signal input module 1 simulates passive control level state changes; the valve control module 4 is used for receiving control signals converted by the active control signals input by the signal processing module 2, or responding to the level changes guided by the protection module 3 and converting them into actual valve actions.

[0035] In this embodiment, the signal input module 1 in the valve control circuit can access an active signal according to actual needs, or simulate the required level condition change of passive control through a specific pin connection operation, and then the active signal is accurately processed by the signal processing module 2, and the level change of the simulated passive control is adaptively guided by the protection module 3, so as to convert the active signal or the level change of the simulated passive control into a control signal that can be effectively used by the valve control module 4; through the close cooperation of each module, a valve control circuit compatible with multiple input forms is realized, greatly improving the versatility and adaptability of the valve control circuit.

[0036] Specifically, the valve control circuit further comprises a toggle switch K1, and the toggle switch K1 is used to connect the signal input module 1, the signal processing module 2 and the protection module 3.

[0037] In this embodiment, the toggle switch K1 can be a 6-pin toggle switch with a model number of MS-22D16, which includes a first switch pin K1-1, a second switch pin K1-2, a third switch pin K1-3, a fourth switch pin K1-4, a fifth switch pin K1-5 and a sixth switch pin K1-6; wherein the first switch pin K1-1 and the fourth switch pin K1-4 are respectively used to connect the first input terminal J1 and the second input terminal J2 in the signal input module 1, and the third switch pin K1-3 and the sixth switch pin K1-6 are respectively connected to the valve opening signal processing unit and the valve closing signal processing unit in the signal processing module 2; the second switch pin K1-2 and the fifth switch pin K1-5 are respectively connected to the second diode D2 and the fourth diode D4 in the protection module 3; the toggle switch K1 is used to control the on-off of the valve circuit, and also plays a role of signal switching.

[0038] Specifically, the signal input module 1 includes a first input terminal J1 and a second input terminal J2; the first input terminal J1 and the second input terminal J2 are respectively connected to the toggle switch K1; the first input terminal J1 is used to output a valve opening control active signal, or simulate a passive control level state change required for valve opening control; the second input terminal J2 is used to output a valve closing control active signal, or simulate a passive control level state change required for valve closing control.

[0039] In the embodiment, the first input terminal J1 includes a first input pin J1-1 and a first ground pin J1-2; the second input terminal J2 includes a second input pin J2-1 and a second ground pin J2-2; the first ground pin J1-1 is connected with the first switch pin K1-1, and the second input pin J2-1 is connected with the fourth switch pin K1-4; when the valve control circuit is controlled by an active signal, the first input pin J1-1 or the second input pin J1-2 is used to control the access of the active signal; when the valve control circuit is controlled by a passive signal, the first input pin J1-1 is short-circuited with the first ground pin J1-2, the second input pin J2-1 is short-circuited with the second ground pin J2-2, and the level state of the first input pin J1-1 and the second input pin J2-1 is changed, so as to guide the current flow direction in the circuit, thereby realizing passive control.

[0040] Specifically, the signal processing module 2 includes a valve opening signal processing unit and a valve closing signal processing unit.

[0041] The valve opening signal processing unit includes a first diode D1, a first capacitor C1, a fourth resistor R4, a fifth diode D5, a fifth resistor R5, a third resistor R3 and a second triode Q2; the positive electrode of the first diode D1 is connected with the toggle switch K1, the negative electrode of the first diode D1 is connected with one end of the first capacitor C1, one end of the fourth resistor R4 and the negative electrode of the fifth diode D5, the other end of the first capacitor C1 is grounded, the other end of the fourth resistor R4 is connected with the anode of the fifth diode D5 through the fifth resistor R5; the anode of the fifth diode D5 is connected with one end of the third resistor R3; the other end of the third resistor R3 and the base of the second triode Q2 are connected; the emitter of the second triode Q2 is grounded, and the collector of the second triode Q2 is connected with the valve control module 4.

[0042] The valve closing signal processing unit includes a third diode D3, a second capacitor C2, a ninth resistor R9, a sixth diode D6, a tenth resistor R10, an eighth resistor R8 and a fourth triode Q4; the positive electrode of the third diode D3 is connected with the toggle switch K1, the negative electrode of the third diode D3 is connected with one end of the second capacitor C2, one end of the ninth resistor R9 and the negative electrode of the sixth diode D6, the other end of the second capacitor C2 is grounded, the other end of the ninth resistor R9 is connected with the anode of the sixth diode D6 through the tenth resistor R10; the anode of the sixth diode D6 is connected with one end of the eighth resistor R8; the other end of the eighth resistor R8 and the base of the fourth triode Q4 are connected; the emitter of the fourth triode Q4 is grounded, and the collector of the fourth triode Q4 is connected with the valve control module 4.

[0043] In the valve opening signal processing unit, the first diode D1 performs rectification work, the first capacitor C1 and the fourth resistor R4 form a filter circuit, and play a role in filtering surge voltage; the negative electrode of the fifth diode D5 is connected with the positive electrode of the first diode D1, which isolates the front and rear circuits, prevents reverse crosstalk of the front abnormal signal, limits the amplitude of the forward voltage at the same time, and protects the sensitive elements such as the rear triode from the impact of the overvoltage; in the valve closing signal unit, the third diode D3, the second capacitor C2, the ninth resistor R9, the sixth diode D6, the tenth resistor R10 and the eighth resistor R8 have similar functions to the first diode D1, the first capacitor C1, the fourth resistor R4, the fifth diode D5, the fifth resistor R5 and the third resistor R3.

[0044] The second triode Q2 and the fourth triode Q4 are used to directly control the conduction of the valve control module 4; when the base of the second triode Q2 and the fourth triode Q4 receives a suitable control signal and meets the conduction condition, the second triode Q2 and the fourth triode Q4 are turned on, a path is formed between the collector and the emitter of the second triode Q2 and the fourth triode Q4, and the current flows through the second triode Q2 or the fourth triode Q4 to the valve opening control unit and the valve closing control unit connected thereto, so that the valve opening relay RL1 or the valve closing relay RL2 is powered on, the relay contact is actuated, and then the valve is opened; on the contrary, when the control signal input to the base of the second triode Q2 and the fourth triode Q4 disappears or does not meet the conduction condition, the second triode Q2 and the fourth triode Q4 are cut off, the valve opening relay RL1 or the valve closing relay RL2 coil loses power, and the valve remains closed or in the current state.

[0045] Specifically, the valve control module 4 includes a valve opening control unit and a valve closing control unit.

[0046] The valve opening control unit includes a first resistor R1, a second resistor R2, a first triode Q1 and a valve opening relay RL1; the collector of the first triode Q1 is connected with the valve opening relay RL1, the base of the first triode Q1 is connected with one end of the second resistor R2, the emitter of the first triode Q1 is connected with one end of the first resistor R1, and the other end of the second resistor R2 and the other end of the first resistor R1 are connected with the collector of the second triode Q2.

[0047] The valve closing control unit includes a sixth resistor R6, a seventh resistor R7, a third triode Q3 and a valve closing relay RL2; the collector of the third triode Q3 is connected with the valve closing relay RL2, the base of the third triode Q3 is connected with one end of the seventh resistor R7, the emitter of the third triode Q3 is connected with one end of the sixth resistor R6, and the other end of the seventh resistor R7 and the other end of the sixth resistor R6 are connected with the collector of the fourth triode Q4.

[0048] In the embodiment, the first resistor R1 provides a suitable bias voltage for the triode, ensuring that it is in a stable state when static; the second resistor R2 limits the current flowing into the base of the first triode Q1, preventing excessive current from damaging the first triode Q1 and serving as a current-limiting protection; the first triode Q1 serves as a direct control element for opening the valve opening relay RL1, and is driven by the state of the second triode Q2; when the second triode Q2 is turned on, the first triode Q1 base obtains a suitable voltage, and the first triode Q1 is turned on, so that the valve opening relay RL1 coil is powered on, triggering the contact action, driving the valve opening mechanical structure to operate, and realizing the valve opening.

[0049] The sixth resistor R6, the seventh resistor R7, the third triode Q3 and the valve closing relay RL2 have similar working principles to the first resistor R1, the second resistor R2, the first triode Q1 and the valve opening relay RL1.

[0050] Specifically, the protection module 3 includes a second diode D2 and a fourth diode D4; the negative electrode of the second diode D2 is connected with the toggle switch K1, and the positive electrode of the second diode D2 is connected with the valve control module 4; the negative electrode of the fourth diode D4 is connected with the toggle switch K1, and the positive electrode of the fourth diode D4 is connected with the valve control module 4.

[0051] In the embodiment, the second diode D2 and the fourth diode D4 serve as anti-misconnection devices, specifically, they utilize the one-way conductivity to guide the corresponding level change to the valve control module 4, prevent the external erroneous current flow or abnormal voltage from being reversely filled into the valve control module 4, and avoid mis-triggering the valve action.

[0052] Specifically, the valve opening relay RL1 and the valve closing relay RL2 are electronic power relays.

[0053] In the embodiment, the electronic power relays are used as the valve opening and closing relays, so that the valve control system is more easily integrated with other electronic devices or systems, and a large amount of complex wiring connection is saved compared with traditional ordinary relays and contactors.

[0054] Specifically, it also includes a working power supply VCC connected with the valve control module 4; the working power supply VCC is used to provide a working voltage for the valve control circuit. In the embodiment, the working power supply VCC provides a 24V DC working voltage for the valve control circuit.

[0055] The working principle of the first aspect of the utility model is as follows:

[0056] When the valve control circuit is actively controlled, an external active signal is input through the first input terminal J1 or the second input terminal J2 of the signal input module 1; taking the valve opening control as an example, the signal is input from the first input pin, transferred to the third switch pin through the first switch pin of the toggle switch K1, and enters the valve opening signal processing unit; in the valve opening signal processing unit, the first diode D1 rectifies the alternating current signal or ensures the forward transmission of the direct current signal, the first capacitor C1 and the fourth resistor R4 filter to remove the surge, and after isolation and limiting by the fifth diode D5, the appropriate control signal drives the second triode Q2 to conduct. The conducting second triode Q2 makes the current flow into the first triode Q1 base through the second resistor R2, triggers the first triode Q1 to conduct, the valve opening relay RL1 coil is powered on, the contact is closed, and the valve is opened. Similarly, the valve closing control active signal is processed through the corresponding path, and the valve closing relay RL2 is driven to achieve valve closing.

[0057] When the valve control circuit is passively controlled, taking the valve opening control as an example, the first input pin of the first input terminal J1 is short-circuited with the first ground pin, the level state is changed, and a passive signal is simulated; the current path in the circuit changes, and the signal is guided to the base of the first triode Q1 in the valve control module 4 through the second diode D2 connected with the short-circuited pin, so that the base voltage of the first triode Q1 is pulled down to close to the ground potential, the first triode Q1 is turned on, and the valve is opened.

[0058] The second aspect embodiment of the utility model provides a PCB, the PCB is printed with the valve control circuit of any one of the above.

[0059] The PCB according to the second aspect embodiment of the utility model has the corresponding beneficial effects because the valve control circuit of the above technical solution is included.

[0060] The third aspect embodiment of the utility model provides a valve control device, and the valve control device realizes work control by using the valve control circuit of any one of the above.

[0061] The valve control device according to the third aspect embodiment of the utility model has the corresponding beneficial effects because the valve control circuit of the above technical solution is included.

[0062] The preferred embodiments of the utility model are described in detail above, but the disclosure is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the disclosure.

Claims

1. A valve control circuit, characterized by, The utility model relates to a valve control circuit, including: Signal input module (1), signal processing module (2), protection module (3) and valve control module (4), signal input module (1) is connected with valve control module (4) through signal processing module (2) and protection module (3) respectively, Signal input module (1) is used to input active control signal or analog passive control level state change to valve control module (4), signal processing module (2) is used to process the active control signal of signal input module (1) input and guide active control signal to valve control module (4), protection module (3) is used to guide corresponding level change to valve control module (4) when signal input module (1) analog passive control level state change, valve control module (4) is used to receive the control signal of active control signal conversion of signal processing module (2) input or response protection module (3) guided level change and convert it into actual valve action.

2. The valve control circuit of claim 1, wherein: The valve control circuit further comprises a toggle switch K1, and the toggle switch K1 is used to connect the signal input module (1), the signal processing module (2) and the protection module (3).

3. The valve control circuit of claim 2, wherein: The signal input module (1) comprises a first input terminal J1 and a second input terminal J2, the first input terminal J1 and the second input terminal J2 are connected with the toggle switch K1 respectively, the first input terminal J1 is used to output a valve opening control active signal or simulate passive control level state change required for valve opening control, and the second input terminal J2 is used to output a valve closing control active signal or simulate passive control level state change required for valve closing control.

4. The valve control circuit of claim 2, wherein: The signal processing module (2) comprises a valve opening signal processing unit and a valve closing signal processing unit. The valve opening signal processing unit comprises a first diode D1, a first capacitor C1, a fourth resistor R4, a fifth diode D5, a fifth resistor R5, a third resistor R3 and a second triode Q2, the positive electrode of the first diode D1 is connected with the toggle switch K1, the negative electrode of the first diode D1 is connected with one end of the first capacitor C1, one end of the fourth resistor R4 and the negative electrode of the fifth diode D5, the other end of the first capacitor C1 is grounded, the other end of the fourth resistor R4 is connected with the anode of the fifth diode D5 through the fifth resistor R5, the anode of the fifth diode D5 is connected with one end of the third resistor R3, the other end of the third resistor R3 and the base of the second triode Q2 are connected, the emitter of the second triode Q2 is grounded, and the collector of the second triode Q2 is connected with the valve control module (4), The valve closing signal processing unit comprises a second diode D2, a second capacitor C2, a sixth resistor R6, a sixth diode D6, a sixth resistor R7, a fourth resistor R4 and a third triode Q3, the positive electrode of the second diode D2 is connected with the toggle switch K1, the negative electrode of the second diode D2 is connected with one end of the second capacitor C2, one end of the sixth resistor R6 and the negative electrode of the sixth diode D6, the other end of the second capacitor C2 is grounded, the other end of the sixth resistor R6 is connected with the anode of the sixth diode D6 through the sixth resistor R7, the anode of the sixth diode D6 is connected with one end of the fourth resistor R4, the other end of the fourth resistor R4 and the base of the third triode Q3 are connected, the emitter of the third triode Q3 is grounded, and the collector of the third triode Q3 is connected with the valve control module (4). The valve closing signal processing unit comprises a third diode D3, a second capacitor C2, a ninth resistor R9, a sixth diode D6, a tenth resistor R10, an eighth resistor R8 and a fourth triode Q4; the positive electrode of the third diode D3 is connected with the toggle switch K1, the negative electrode of the third diode D3 is connected with one end of the second capacitor C2, one end of the ninth resistor R9 and the negative electrode of the sixth diode D6, the other end of the second capacitor C2 is grounded, the other end of the ninth resistor R9 is connected with the anode of the sixth diode D6 through the tenth resistor R10; the anode of the sixth diode D6 is connected with one end of the eighth resistor R8; the other end of the eighth resistor R8 and the base of the fourth triode Q4 are connected; the emitter of the fourth triode Q4 is grounded, and the collector of the fourth triode Q4 is connected with the valve control module (4).

5. The valve control circuit of claim 4, wherein: The valve control module (4) comprises a valve opening control unit and a valve closing control unit; The valve opening control unit comprises a first resistor R1, a second resistor R2, a first triode Q1 and a valve opening relay RL1; the collector of the first triode Q1 is connected with the valve opening relay RL1, the base of the first triode Q1 is connected with one end of the second resistor R2, the emitter of the first triode Q1 is connected with one end of the first resistor R1, the other end of the second resistor R2 and the other end of the first resistor R1 are connected with the collector of the second triode Q2; The valve closing control unit comprises a sixth resistor R6, a seventh resistor R7, a third triode Q3 and a valve closing relay RL2; the collector of the third triode Q3 is connected with the valve closing relay RL2, the base of the third triode Q3 is connected with one end of the seventh resistor R7, the emitter of the third triode Q3 is connected with one end of the sixth resistor R6, the other end of the seventh resistor R7 and the other end of the sixth resistor R6 are connected with the collector of the fourth triode Q4.

6. The valve control circuit of claim 2, wherein: The protection module (3) comprises a second diode D2 and a fourth diode D4; the negative electrode of the second diode D2 is connected with the toggle switch K1, and the positive electrode of the second diode D2 is connected with the valve control module (4); the negative electrode of the fourth diode D4 is connected with the toggle switch K1, and the positive electrode of the fourth diode D4 is connected with the valve control module (4).

7. The valve control circuit of claim 5, wherein: The valve opening relay and the valve closing relay are electronic power relays.

8. The valve control circuit of claim 1, wherein: Further comprising a working power supply VCC, which is connected with the valve control module (4); the working power supply VCC is used for providing working voltage for the valve control circuit.

9. A PCB board characterized by, The PCB board is printed with the valve control circuit according to any one of claims 1-8.

10. A valve control device characterized by: The valve control device is realized by the valve control circuit according to any one of claims 1-8.

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