Electromagnetic valve control device

Abstract

An electromagnetic valve control device comprises an input port, a rectification loop, an energy storage loop, a voltage detection loop, a driving loop and a trip coil. The input end is used for receiving current input of a current transformer; the rectification loop is connected with the input port and is used for rectifying an alternating current signal of the current transformer and outputting a direct current power supply; the energy storage loop is connected with the rectification loop and is used for storing energy of the current output by the current transformer and releasing energy when the energy storage voltage reaches a preset value so as to drive the trip coil to trip the electromagnetic valve; the voltage detection loop is connected with the energy storage loop and used for monitoring the voltage state in real time, judging whether the energy storage voltage reaches a preset threshold value or not according to the IN + and IN-voltage difference and providing a voltage feedback signal. And the driving loop is connected with the voltage detection loop and is used for controlling the tripping coil to execute the tripping action of the electromagnetic valve.

Description

Technical Field

[0001] This utility model relates to a solenoid valve control device, belonging to the field of solenoid valves. Background Technology

[0002] In current power protection and control systems, current transformers are commonly used to monitor circuit status, and they can output 5A current at a 50:5 transformation ratio. However, due to the low output power of current transformers, this small current is usually insufficient to directly drive the trip solenoid valve to reliably achieve the circuit breaker tripping action. To solve this problem, some existing technologies attempt to enhance the driving capability through external power supplies or complex signal amplification circuits, but these solutions often result in larger system size, increased cost, and shortcomings in response speed and reliability.

[0003] Furthermore, traditional solenoid valve control systems have certain limitations in preventing reverse connection and voltage judgment. For example, if the input current is reversed, it can easily damage the control module; and if the voltage judgment is not timely or accurate, the solenoid valve may not be able to act quickly at critical moments, thus affecting the safety of the entire circuit protection system. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a solenoid valve control device.

[0005] An electromagnetic valve control device includes an input port, a rectifier circuit, an energy storage circuit, a voltage detection circuit, a drive circuit, and a trip coil; the input port is used to receive the current input from a current transformer.

[0006] The rectifier circuit is connected to the input port and is used to rectify the AC signal of the current transformer and output DC power.

[0007] The energy storage circuit is connected to the rectifier circuit and is used to store the current output by the current transformer and release the energy when the energy storage voltage reaches a preset value, so as to drive the trip coil to trip the solenoid valve.

[0008] The voltage detection circuit is connected to the energy storage circuit and is used to monitor the voltage status in real time. It determines whether the energy storage voltage has reached the preset threshold based on the voltage difference between IN+ and IN-, and provides a voltage feedback signal.

[0009] The drive circuit is connected to the voltage detection circuit, and the drive circuit is used to control the trip coil to perform the solenoid valve tripping action.

[0010] The AC signal output from the current transformer is converted into DC power through a rectifier circuit, ensuring stable power supply to the system. The energy storage circuit effectively stores energy and releases it when a preset voltage is reached, driving the trip coil to reliably trip the solenoid valve. A precise voltage monitoring and feedback mechanism ensures that the solenoid valve operates only under appropriate voltage conditions, preventing malfunctions caused by abnormal voltage, improving the system's adaptability and fault diagnosis capabilities, and enhancing overall reliability. Through the coordinated operation of modules such as rectification, energy storage, voltage detection, and intelligent control, efficient, precise, and safe control of the solenoid valve is achieved, improving system performance and reliability.

[0011] Preferably, the voltage detection circuit includes a processing chip. Upon receiving a feedback signal, the processing chip determines its position and sends a corresponding control signal to the drive circuit. By processing the feedback signal, the processing chip accurately monitors the energy storage voltage state, ensuring that a control signal is only output when a preset threshold is reached. This ensures the trip coil actuates at the appropriate time, preventing malfunctions. Rapid processing of the feedback signal and timely transmission of the control signal to the drive circuit improves the overall system response speed.

[0012] Furthermore, the drive circuit includes an actuator that receives control signals generated by the computing chip and outputs on / off signals via an electronic switch to power the trip coil and de-energize it, thereby controlling the solenoid valve. The electronic switch enables rapid switching, allowing the actuator to quickly respond to the control signals from the computing chip, significantly improving the overall system response speed. When the control signal indicates a power-off condition, the actuator cuts off the power supply to the trip coil, effectively avoiding unnecessary energy consumption and potential component overheating due to continuous power supply, further improving system safety and energy efficiency. The inclusion of an actuator in the drive circuit makes the system structure more modular, facilitating subsequent maintenance, debugging, and functional expansion, enhancing the system's adaptability and flexibility.

[0013] Preferably, the energy storage circuit includes a controller for internal energy storage, releasing energy when the stored voltage reaches a preset threshold. Both the internal energy storage and energy release processes are precisely managed by the controller, effectively shortening the system response time and ensuring rapid and accurate triggering of the tripping action even when the current transformer output current is low. The controller intelligently controls energy release based on the preset threshold, avoiding energy waste or premature release, thereby improving the overall system energy utilization rate and reducing system operating costs. By accurately judging and controlling the release of the stored voltage through the controller, overvoltage problems caused by excessive energy storage can be prevented, protecting the downstream drive circuit and tripping coil, and improving the overall safety and reliability of the system.

[0014] Furthermore, the energy storage circuit is connected to a voltage limiting circuit to prevent the energy storage voltage from exceeding the safety threshold. Effective control of the energy storage voltage ensures that all system components operate within their normal operating voltage range, reducing the risk of circuit failures or accidental tripping caused by abnormal voltage. By effectively suppressing the impact of excessively high voltage on system components, the risk of component aging and damage is reduced, thereby improving the reliability and service life of the entire solenoid valve control device.

[0015] Preferably, the input port includes several input terminals, which are respectively used to receive the current input from the A, B, and C phase transformers to provide three-phase current detection capability. By receiving the A, B, and C phase current inputs respectively, real-time monitoring of the three-phase current status can be achieved, ensuring the balance of current in each phase, timely detection of current imbalance or abnormalities, and improving the operational stability and safety of the entire system.

[0016] Furthermore, the input port is also connected to a reverse connection protection circuit to prevent damage to the module when the input is reversed. This circuit effectively prevents reverse current flow caused by incorrect connection, thereby avoiding module damage and improving system stability and durability. The circuit automatically identifies the input polarity; when reverse connection occurs, it prevents incorrect current from entering the system, avoiding damage to the solenoid valve control device and reducing maintenance costs due to operational errors.

[0017] Preferably, the current input of the current transformer is 5A, and the energy storage voltage of the energy storage module is 18V. Using a 5A current input conforms to the standard of conventional current transformers, making the solenoid valve control device suitable for most industrial and power systems, facilitating integration and use. Setting the energy storage voltage to 18V ensures sufficient driving energy is provided when the solenoid valve trips, improving the reliability and efficiency of the tripping action. The current input of the current transformer and the energy storage voltage of the energy storage module can also be set to other values ​​according to different operating environments and adapted systems, offering high flexibility.

[0018] The beneficial effects of this invention are as follows: The rectifier circuit converts the AC signal output from the current transformer into DC power, ensuring stable power supply to the system. The energy storage circuit effectively stores energy and releases it when a preset voltage is reached, driving the trip coil to reliably trip the solenoid valve. A precise voltage monitoring and feedback mechanism ensures that the solenoid valve operates only under appropriate voltage conditions, preventing malfunctions caused by abnormal voltage, improving the system's adaptability and fault diagnosis capabilities, and enhancing overall reliability. Through the coordinated operation of modules such as rectification, energy storage, voltage detection, and intelligent control, efficient, precise, and safe control of the solenoid valve is achieved, improving the system's performance and reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0020] Figure 1 This is a wiring diagram of the present invention;

[0021] Figure 2 This is the equivalent circuit diagram of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0023] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0024] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0025] like Figure 1-2 The image shows an embodiment of a solenoid valve control device according to this utility model, including an input port, a rectifier circuit, an energy storage circuit, a voltage detection circuit, a drive circuit, and a trip coil; the input port is used to receive the current input from the current transformer;

[0026] The rectifier circuit is connected to the input port and is used to rectify the AC signal of the current transformer and output DC power.

[0027] The energy storage circuit is connected to the rectifier circuit and is used to store the current output by the current transformer and release the energy when the energy storage voltage reaches a preset value, so as to drive the trip coil to trip the solenoid valve.

[0028] The voltage detection circuit is connected to the energy storage circuit and is used to monitor the voltage status in real time. It determines whether the energy storage voltage has reached the preset threshold based on the voltage difference between IN+ and IN-, and provides a voltage feedback signal.

[0029] The drive circuit is connected to the voltage detection circuit, and the drive circuit is used to control the trip coil to perform the solenoid valve tripping action.

[0030] The AC signal output from the current transformer is converted into DC power through a rectifier circuit, ensuring stable power supply to the system. The energy storage circuit effectively stores energy and releases it when a preset voltage is reached, driving the trip coil to reliably trip the solenoid valve. A precise voltage monitoring and feedback mechanism ensures that the solenoid valve operates only under appropriate voltage conditions, preventing malfunctions caused by abnormal voltage, improving the system's adaptability and fault diagnosis capabilities, and enhancing overall reliability. Through the coordinated operation of modules such as rectification, energy storage, voltage detection, and intelligent control, efficient, precise, and safe control of the solenoid valve is achieved, improving system performance and reliability.

[0031] The voltage detection circuit includes a processing chip. Upon receiving a feedback signal, the processing chip determines its position and sends a corresponding control signal to the drive circuit. By analyzing the feedback signal, the processing chip accurately monitors the energy storage voltage state, ensuring that a control signal is only output when a preset threshold is reached. This guarantees that the trip coil actuates at the appropriate time, preventing malfunctions. Rapid processing of feedback signals and timely transmission of control signals to the drive circuit improves the overall system response speed.

[0032] The drive circuit includes an actuator that receives control signals generated by the computing chip and outputs on / off signals via an electronic switch to power the trip coil and de-energize it, thereby controlling the solenoid valve. The electronic switch enables rapid switching, allowing the actuator to quickly respond to the control signals from the computing chip, significantly improving the overall system response speed. When the control signal indicates a power-off condition, the actuator cuts off the power supply to the trip coil, effectively avoiding unnecessary energy consumption and potential component overheating due to continuous power supply, further enhancing system safety and energy efficiency. The inclusion of an actuator in the drive circuit makes the system structure more modular, facilitating subsequent maintenance, debugging, and functional expansion, thus enhancing the system's adaptability and flexibility.

[0033] The energy storage circuit includes a controller for internal energy storage, releasing energy when the stored voltage reaches a preset threshold. Both the internal energy storage and energy release processes are precisely managed by the controller, effectively shortening the system response time and ensuring rapid and accurate triggering of the tripping action even when the current transformer output current is low. The controller intelligently controls energy release based on the preset threshold, avoiding energy waste or premature release, thereby improving the overall system energy utilization rate and reducing system operating costs. By accurately judging and controlling the release of the stored voltage, the controller can prevent overvoltage problems caused by excessive energy storage, protecting the downstream drive circuit and tripping coil, and improving the overall safety and reliability of the system.

[0034] The energy storage circuit is connected to a voltage limiting circuit to prevent the energy storage voltage from exceeding the safety threshold. Effective control of the energy storage voltage ensures that all system components operate within their normal operating voltage range, reducing the risk of circuit failures or accidental tripping caused by abnormal voltage. By effectively suppressing the impact of excessively high voltage on system components, the risk of component aging and damage is reduced, thereby improving the reliability and service life of the entire solenoid valve control device.

[0035] The input port includes several input terminals, which are used to receive the current input from the A, B, and C phase transformers to provide three-phase current detection capability. By receiving the A, B, and C phase current inputs respectively, real-time monitoring of the three-phase current status can be achieved, ensuring the balance of current in each phase, timely detection of current imbalance or abnormalities, and improving the operational stability and safety of the entire system.

[0036] This embodiment differs from the previous embodiments in that the input port is also connected to a reverse connection protection circuit to prevent damage to the module when the input is reversed. The reverse connection protection circuit effectively prevents reverse current flow caused by incorrect connection, thereby avoiding module damage and improving system stability and durability. This circuit can automatically identify the input polarity; when reverse connection occurs, it can prevent incorrect current from entering the system, avoiding damage to the solenoid valve control device and reducing maintenance costs caused by operational errors.

[0037] This embodiment differs from the previous embodiments in that the current transformer has a current input of 5A, and the energy storage module has an energy storage voltage of 18V. Using a 5A current input conforms to the standard of conventional current transformers, making this solenoid valve control device suitable for most industrial and power systems, facilitating integration and use. Setting the energy storage voltage to 18V ensures sufficient driving energy is provided when the solenoid valve trips, improving the reliability and efficiency of the tripping action. The current input of the current transformer and the energy storage voltage of the energy storage module can also be set to other values ​​according to different operating environments and adapted systems, offering high flexibility.

[0038] See Figure 2 Circuit diagram.

[0039] 1. Input Port

[0040] Input terminal 1, input terminal 2, and input terminal 3 correspond to the input signals of the three-phase current transformers A, B, and C, respectively.

[0041] LF1, LF2, LF3: Current Transformer (CT), used to sample the current of each phase and provide isolation protection.

[0042] 2. Rectifier circuit

[0043] DB1 and DB2: Two sets of bridge rectifier circuits used to convert three-phase AC signals into DC voltage.

[0044] C1: Capacitor, used to smooth the waveform after rectification, reduce ripple, and improve voltage stability.

[0045] ZDi (Zenient Diode): It serves as a voltage limiting protection, preventing the voltage from exceeding a set threshold.

[0046] 3. Energy storage circuit

[0047] VD1 (can be a Zener diode or a freewheeling diode): works in conjunction with the energy storage capacitor to prevent overvoltage from affecting subsequent circuits and to ensure energy storage.

[0048] R1, R2, R3, R4 (resistor network): used for voltage divider detection and adjusting the input of the voltage feedback signal.

[0049] 4. Voltage Detection and Operational Amplifier

[0050] Operational amplifier IC1: Used to detect whether the energy storage voltage has reached the preset value. If it has, it sends a signal to the drive circuit.

[0051] R5 and R6: Adjust the gain of the operational amplifier to ensure reliable signal detection.

[0052] 5. Drive circuit (MOSFET-controlled trip coil)

[0053] MOSFET (Q1): It acts as an electronic switch and is controlled by the output signal of the operational amplifier.

[0054] VD2 (freewheeling diode): Used to prevent damage to the circuit from the induced electromotive force at the moment of MOSFET turn-off, and to protect the electromagnet (trip coil).

[0055] Electromagnet (trip coil): Ultimately drives the tripping mechanism and controls the operation of the solenoid valve.

[0056] A reverse connection protection circuit consisting of a diode or a MOSFET can be added to the input port. The parameters of the ZDi Zener diode need to be selected appropriately to ensure effective clamping before the voltage exceeds the safe threshold, while not affecting normal operation.

[0057] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0058] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A solenoid valve control device, characterized in that: It includes an input port, a rectifier circuit, an energy storage circuit, a voltage detection circuit, a drive circuit, and a trip coil; The input terminal is used to receive the current input from the current transformer; The rectifier circuit is connected to the input port and is used to rectify the AC signal of the current transformer and output DC power. The energy storage circuit is connected to the rectifier circuit and is used to store the current output by the current transformer and release the energy when the energy storage voltage reaches a preset value, so as to drive the trip coil to trip the solenoid valve. The voltage detection circuit is connected to the energy storage circuit and is used to monitor the voltage status in real time. It determines whether the energy storage voltage has reached the preset threshold based on the voltage difference between IN+ and IN-, and provides a voltage feedback signal. The drive circuit is connected to the voltage detection circuit, and the drive circuit is used to control the trip coil to perform the solenoid valve tripping action.

2. The solenoid valve control device as described in claim 1, characterized in that: The voltage detection circuit is equipped with a computing chip. After receiving the feedback signal, the computing chip judges and sends the corresponding control signal to the drive circuit.

3. The solenoid valve control device as described in claim 2, characterized in that: The drive circuit is equipped with an actuator, which is used to receive control signals generated by the computing chip and output open or close signals through an electronic switch to power and de-energize the trip coil to control the solenoid valve.

4. The solenoid valve control device as described in claim 1, characterized in that: The energy storage circuit includes a controller, which is used for internal energy storage and releases energy when the energy storage voltage reaches a preset threshold.

5. The solenoid valve control device as described in claim 4, characterized in that: The energy storage circuit is connected to a voltage limiting circuit to prevent the energy storage voltage from exceeding the safety threshold.

6. The solenoid valve control device as described in claim 1, characterized in that: The input port includes several input terminals, which are used to receive the current input from the three phase transformers A, B, and C, respectively, to provide three-phase current detection capability.

7. The solenoid valve control device as described in claim 1 or 6, characterized in that: The input port is also connected to a reverse connection protection circuit to prevent damage to the module when the input is reversed.

8. The solenoid valve control device as described in claim 1, characterized in that: The current input of the current transformer is 5A, and the energy storage voltage of the energy storage module is 18V.

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