A drive control system for an electrically operated on-off pinch valve

Abstract

The utility model provides a kind of drive control system of electric opening and closing pinch valve, including power input module, voltage conversion module, position sensing module and drive module, wherein, one end of power input module is electrically connected with external power output end, the other end is electrically connected with the input end of voltage conversion module, voltage conversion module is used to step-down external power supply;The input end of position sensing module is electrically connected with the output end of voltage conversion module, for respectively detecting whether the opening and closing limit position of pinch valve is in place, and output corresponding detection signal;The input end of drive module is electrically connected with the output end of position sensing module, for driving pinch valve to execute opening and closing action according to detection signal, the control system is accurately detected pinch valve opening and closing limit position by the position sensing module set, effectively improve working accuracy, simultaneously with drive module cooperation control pinch valve action, form closed-loop control, effectively improve the accuracy and stability of control.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a drive control system for an electrically operated opening and closing clamp valve. Background Technology

[0002] Pinch valves are primarily used as switches for fluid passages. They control the fluid path by squeezing or releasing the hose, eliminating the need for direct contact with the liquid and preventing contamination. Pinch valves are used in analytical and medical instruments, as well as in industrial applications, to control highly corrosive or high-purity liquids. The airtight isolation between the control mechanism and the fluid inside the tube prevents particulate contamination caused by friction from moving parts, thus ensuring maximum liquid purity.

[0003] A solenoid valve drive control circuit disclosed in CN213236265U includes: a step-down module, a delay module, a first switch module, a second switch module, a first diode, and a second diode; the step-down module has its input terminal connected to an external power supply terminal, and its output terminal connected to the input terminal of the delay module and the anode of the first diode, respectively; the second switch module has its first terminal connected to the input terminal of the step-down module, its second terminal grounded, its control terminal connected to the output terminal of the delay module, and its third terminal connected to the control terminal of the first switch module; the first switch module has its first terminal connected to the input terminal of the step-down module, and its second terminal connected to the first terminal of the solenoid valve coil, the cathode of the first diode, and the cathode of the second diode, respectively; the anode of the second diode is grounded; the second terminal of the solenoid valve coil is grounded.

[0004] The valve body in the above solution lacks a position sensing module during motor drive. During motor operation, it is impossible to detect the opening and closing limit positions of the pinch valve in real time and accurately. This means that when controlling the action of the pinch valve, it can only rely on preset parameters or experience to judge, making it difficult to flexibly adjust according to the actual working conditions. This can easily lead to situations where the valve is not opened or closed properly, affecting the normal operation of the system and reducing the control accuracy of the valve body. Utility Model Content

[0005] In view of this, this utility model proposes a drive control system for an electrically operated opening and closing pinch valve. By setting a position sensing module to accurately detect the opening and closing limit position of the pinch valve, the working accuracy is effectively improved. At the same time, it works in conjunction with the drive module to control the action of the pinch valve, forming a closed-loop control, which effectively improves the accuracy and stability of the control.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a drive control system for an electrically operated opening and closing pinch valve, including a power input module, a voltage conversion module, a position sensing module, and a drive module, wherein... One end of the power input module is electrically connected to the output of the external power supply, and the other end is electrically connected to the input of the voltage conversion module. The voltage conversion module is used to step down the voltage of the external power supply. The input terminal of the position sensing module is electrically connected to the output terminal of the voltage conversion module to detect whether the opening and closing limit positions of the pinch valve are in place and output the corresponding detection signals. The input terminal of the drive module is electrically connected to the output terminal of the position sensing module, and is used to drive the pinch valve to perform opening and closing actions according to the detection signal.

[0007] Based on the above technical solutions, preferably, the power input module includes a connection terminal J and a first fuse. One end of the connection terminal J is electrically connected to the external power output terminal, and the other end is electrically connected to the first fuse, which is used to protect the entire control circuit.

[0008] Based on the above technical solutions, preferably, the voltage conversion module includes a first input protection unit, a voltage conversion control unit, a power supply unit, and an output protection unit, wherein, The output terminal of the first fuse is electrically connected to the input terminal of the first input protection unit, and is used to limit and filter the external input voltage. The input terminal of the voltage conversion control unit is electrically connected to the output terminal of the first input protection unit, and is used to convert the voltage after current limiting and filtering into the required voltage. The input terminal of the energy storage unit is electrically connected to the output terminal of the voltage conversion control unit, and is used to store electrical energy to provide energy buffer for the voltage conversion control unit; The input terminal of the output protection unit is electrically connected to the output terminal of the power supply unit to prevent the output voltage from reversing.

[0009] Based on the above technical solutions, preferably, the voltage conversion module further includes a feedback unit, wherein one end of the feedback unit is electrically connected to the output terminal of the power supply unit, and the other end is electrically connected to the feedback terminal of the voltage conversion control unit, for feeding back the output voltage to the voltage conversion control unit.

[0010] Based on the above technical solutions, preferably, the position sensing module includes at least two position sensor units and a first logic control unit, wherein, At least two position sensor units are respectively set at the opening and closing limit positions of the pinch valve, and the input terminals of at least two position sensor units are electrically connected to the output terminal of the output protection unit, for detecting the opening and closing limit positions of the pinch valve respectively and outputting a low-level signal; The input terminals of at least two first logic control units are electrically connected to the output terminals of the corresponding position sensor units, respectively, to receive low-level signals output by the position sensor units and determine whether the opening and closing limit positions of the pinch valve are in place.

[0011] Based on the above technical solutions, preferably, the drive module includes a drive control unit and a motor, wherein, The outputs of at least two first logic control units are electrically connected to the inputs of the drive control unit, and are used to control the forward and reverse rotation and stop state of the motor according to the input signal; The input terminal of the motor is electrically connected to the output terminal of the drive control unit, and is used to drive the motor to perform the opening and closing action of the clamp valve.

[0012] Based on the above technical solutions, preferably, it also includes a power status detection module and a manual setting module, wherein, The input terminal of the power status detection module is electrically connected to the output terminal of the power input module to detect the voltage on / off status; The input terminal of the manual setting module is electrically connected to the output terminal of the power status detection module, and the output terminal is electrically connected to the input terminal of each first logic control unit. This is used to set the default opening and closing state of the pinch valve when the power is off, and to restore it to the default state when the power is off.

[0013] Based on the above technical solutions, preferably, the power status detection module includes a second input protection unit and a second logic control unit. The input terminal of the second input protection unit is electrically connected to the output terminal of the first fuse, and is used for voltage division and current limiting of external input voltage; The input terminal of the second logic control unit is electrically connected to the output terminal of the second input protection unit, and is used to output a corresponding level signal according to the on / off state of the external power supply.

[0014] Based on the above technical solutions, preferably, the manual setting module includes at least two switch switching units, the input terminals of the at least two switch switching units are electrically connected to the output terminal of the second logic control unit, and are used to set and switch the default opening and closing state when the pinch valve is de-energized, and the output terminals of the at least two switch switching units are electrically connected to the corresponding input terminals of the first logic control unit.

[0015] Based on the above technical solutions, preferably, it also includes an energy storage power supply module, wherein the input terminal of the energy storage power supply module is electrically connected to the output terminal of the output protection unit and the input terminals of at least two position sensor units, and the output terminal of the energy storage power supply module is electrically connected to the power supply terminal of the drive control unit, for providing temporary power in the event of a power outage.

[0016] The drive control system of the electric opening and closing clamp valve of this utility model has the following advantages over the prior art: (1) The voltage conversion module steps down the external power supply and converts it into a voltage suitable for use inside the circuit, ensuring the stable operation of the circuit. The position sensing module accurately detects the opening and closing limit position of the clamp valve, ensuring working accuracy. At the same time, the drive module controls the clamp valve to act according to the detection signal, forming a closed-loop automatic control, which effectively improves the accuracy and stability of the system control. (2) The second logic control unit can accurately determine the on / off state of the external power supply and output the corresponding level signal, providing accurate power status information for the subsequent manual setting module and the control of the entire system, so that the system can make the correct response according to the power situation. (3) By combining the manual setting module and the energy storage power supply module, the action of the pinch valve can be accurately controlled according to the preset default state when the power supply is abnormally interrupted, thus avoiding the safety problems that may be caused by the uncertainty of the pinch valve state due to power interruption, and ensuring the safety and reliability of the system in the event of power failure. Attached Figure Description

[0017] 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, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is the module principle framework of the drive control system for the electric opening and closing clamp valve of this utility model. Figure 2 This is the unit principle framework of the drive control system for the electric opening and closing clamp valve of this utility model. Figure 3 This is a circuit diagram of the voltage conversion module of the drive control system for the electric opening and closing clamp valve of this utility model. Figure 4 This is a circuit diagram of the voltage conversion module of the drive control system for the electric opening and closing clamp valve of this utility model. Figure 5 This is a circuit diagram of the drive module of the drive control system for the electric opening and closing clamp valve of this utility model. Figure 6 This is a circuit diagram of the power status detection module of the drive control system for the electric opening and closing clamp valve of this utility model. Figure 7 This is a circuit diagram of the energy storage power supply module of the drive control system for the electric opening and closing clamp valve of this utility model. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1 and Figure 2 As shown, the drive control system of an electrically operated pinch valve of this utility model includes a power input module 1, a voltage conversion module 2, a position sensing module 3, and a drive module 4. One end of the power input module 1 is electrically connected to the output terminal of an external power source, and the other end is electrically connected to the input terminal of the voltage conversion module 2, which is used to step down the voltage of the external power source. The input terminal of the position sensing module 3 is electrically connected to the output terminal of the voltage conversion module 2, and is used to detect whether the opening and closing limit positions of the pinch valve are reached, and output the corresponding detection signals. The input terminal of the drive module 4 is electrically connected to the output terminal of the position sensing module 3, and is used to drive the pinch valve to perform opening and closing actions according to the detection signals.

[0021] It should be noted that the voltage conversion module 2 steps down the external power supply and converts it into a voltage suitable for use within the circuit, ensuring stable operation of the circuit. The position sensing module 3 accurately detects the opening and closing limit positions of the clamp valve, ensuring working accuracy. At the same time, the drive module 4 controls the clamp valve to operate based on the detection signal, forming a closed-loop automated control, which effectively improves the accuracy and stability of the system control.

[0022] The power input module 1 in this embodiment includes a connection terminal J1 and a first fuse 11. One end of the connection terminal J1 is electrically connected to the external power output terminal, and the other end is electrically connected to the first fuse 11, which is used to protect the entire control circuit.

[0023] Specifically, in this embodiment, the first fuse 11 is fuse F2. After the power supply is connected through J1, the fuse provides overcurrent protection to prevent short circuit damage to the circuit, thus achieving a protective effect.

[0024] like Figure 3As shown, the voltage conversion module 2 in this embodiment includes a first input protection unit 21, a voltage conversion control unit 22, a power supply unit 23, and an output protection unit 24. The output terminal of the first fuse 11 is electrically connected to the input terminal of the first input protection unit 21, used for current limiting and filtering of the external input voltage. The input terminal of the voltage conversion control unit 22 is electrically connected to the output terminal of the first input protection unit 21, used for converting the current-limited and filtered voltage into the required voltage. The input terminal of the power supply unit 23 is electrically connected to the output terminal of the voltage conversion control unit 22, used for storing electrical energy to provide energy buffer for the voltage conversion control unit 22. The input terminal of the output protection unit 24 is electrically connected to the output terminal of the power supply unit 23, used to prevent reverse output voltage.

[0025] Specifically, in this embodiment, the first input protection unit 21 includes a diode D1, a resistor R3, and a capacitor C6; the voltage conversion control unit 22 includes a resistor R7 and a voltage conversion chip U3; the power supply unit 23 includes a capacitor C10, an inductor L1, and a capacitor C8; and the output protection unit 24 includes a diode D2 and a resistor R10. One end of the resistor R3 is electrically connected to the other end of the fuse F2, and the other end of the resistor R3 is electrically connected to the positive terminal of the diode D1. The negative terminal of the diode D1 is connected to the capacitor C6, the resistor R7, and the voltage conversion chip U3. The input terminal of U3 is electrically connected, the other end of resistor R7 is electrically connected to the enable terminal of voltage conversion chip U3, one end of capacitor C10 is electrically connected to the boost terminal of voltage conversion chip U3, the other end of capacitor C10 is electrically connected to the switch control terminal of voltage conversion chip U3 and inductor L1 respectively, the other end of inductor L1, capacitor C8 is electrically connected to the positive terminal of diode D2, the negative terminal of diode D2 is electrically connected to resistor R10, the other end of resistor R10 serves as the output terminal of voltage conversion module 2, and the other ends of capacitors C8 and C6 are grounded.

[0026] It should be noted that the external input voltage enters diode D1. Diode D1 prevents reverse connection of the input power supply, providing reverse protection and preventing damage to subsequent circuits when the external power supply is connected in reverse. Resistor R3 acts as a current-limiting resistor, limiting the input current and preventing excessive current from damaging the voltage conversion chip U3. Capacitor C6 filters the input power supply, removing high-frequency noise and making the voltage input to the voltage conversion chip U3 more stable. The voltage conversion chip U3 converts the input 9-24VDC voltage to approximately 5V suitable for internal circuitry. Resistor R7 is the control resistor for the enable pin of the voltage conversion chip U3; the voltage level of this pin is controlled to determine the voltage conversion chip's output voltage. To determine whether the chip is working, when the EN pin reaches a certain level, the chip begins voltage conversion. Capacitor C10 serves as an input energy storage capacitor, storing energy when the power input is normal. When the input power fluctuates or there is a brief power outage, it releases the stored energy, providing a certain energy buffer for the voltage conversion chip U3 and maintaining the chip's stable operation. Inductor L1 acts as an energy storage and filter. When the voltage conversion chip U3 performs voltage conversion, the inductor stores and releases energy, working with the capacitor to achieve a smooth voltage output. Capacitor C8 filters and stores energy on the converted 5V voltage, further stabilizing the output voltage, reducing voltage fluctuations, and providing a stable power supply for the internal circuitry.

[0027] The voltage conversion module 2 in this embodiment also includes a feedback unit 25, wherein one end of the feedback unit 25 is electrically connected to the output terminal of the power supply unit 23, and the other end is electrically connected to the feedback terminal of the voltage conversion control unit 22, for feeding back the output voltage to the voltage conversion control unit 22.

[0028] Specifically, the feedback unit 25 in this embodiment includes resistors R8 and R9. One end of resistor R8 is electrically connected to the other end of inductor L1, the positive terminal of diode D1 and capacitor C8, respectively. The other end of resistor R8 is electrically connected to resistor R9 and the output voltage feedback terminal of voltage conversion chip U3, respectively. The other end of resistor R9 is grounded.

[0029] It should be noted that resistors R8 and R9 form a voltage divider circuit, which feeds a portion of the output voltage back to the output voltage of the voltage conversion chip U3. The voltage conversion chip U3 adjusts its output by detecting this feedback voltage to achieve stable voltage control. If the output voltage changes, the chip will adjust its internal working state according to the magnitude of the feedback voltage to keep the output voltage at around 5V.

[0030] In this embodiment, the position sensing module 3 includes at least two position sensor units 31 and a first logic control unit 32. The at least two position sensor units 31 are respectively disposed at the opening and closing limit positions of the pinch valve, and the input terminals of the at least two position sensor units 31 are electrically connected to the output terminal of the output protection unit 24, for detecting the opening and closing limit positions of the pinch valve respectively and outputting a low-level signal. The input terminals of the at least two first logic control units 32 are respectively electrically connected to the output terminals of the corresponding position sensor units 31, for receiving the low-level signals output by the position sensor units 31 and determining whether the opening and closing limit positions of the pinch valve are in place.

[0031] like Figure 4 As shown, specifically, the position sensor unit 31 in this embodiment includes Hall sensors U4 and U5, capacitors C11 and C12, resistors R1 and R2, and the first logic control unit 32 includes NAND gates U2A and U2B. The other end of resistor R10 is electrically connected to capacitors C11 and C12, the power supply terminals of Hall sensors U4 and U5, resistors R1 and R2, respectively. The output terminal of Hall sensor U4 is electrically connected to the other end of resistor R1 and the input terminal of NAND gate U2A, respectively. The output terminal of Hall sensor U5 is electrically connected to the other end of resistor R2 and the input terminal of NAND gate U2B, respectively. The other end of capacitor C11 is grounded with the ground terminal of Hall sensor U4, and the other end of capacitor C12 is grounded with the ground terminal of Hall sensor U5.

[0032] It should be noted that Hall sensors U4 and U5 can effectively detect whether the sensing part on the pinch valve is in position. When it approaches, the Hall sensor outputs a low-level signal, which is transmitted to the corresponding channel of the first logic control unit to indicate that the sensing part has reached the limit position of clamping or releasing, thereby achieving precise control of the pinch valve position, ensuring the stable and reliable operation of the entire drive control circuit, and ensuring that the pinch valve performs the corresponding action in the appropriate position.

[0033] like Figure 5 As shown, the drive module 4 in this embodiment includes a drive control unit 41 and a motor 42. The output terminals of at least two first logic control units 32 are electrically connected to the input terminals of the drive control unit 41, and are used to control the forward and reverse rotation and stop state of the motor according to the input signal. The input terminal of the motor 42 is electrically connected to the output terminal of the drive control unit 41, and is used to drive the motor 42 to perform the opening and closing action of the clamp valve.

[0034] Specifically, the drive control unit 41 in this embodiment includes a drive chip U1, a capacitor C5, and a fuse F1. The output terminals of the NOT gate U2A and the NAND gate U2B are electrically connected to the input terminal of the drive chip U1. The forward rotation output terminal of the drive chip U1 is electrically connected to one end of the capacitor C5 and the fuse F1, respectively. The other end of the fuse F1 is electrically connected to the positive terminal of the motor M1. The reverse rotation output terminal of the drive chip U1 is electrically connected to the other end of the capacitor C5 and the negative terminal of the motor M1, respectively. The power supply terminal of the drive chip U1 is electrically connected to the other end of the resistor R10.

[0035] It should be noted that the signals output by NAND gates U2A and U2B in the position sensing module serve as input signals to the driver module and are transmitted to the input terminal of the driver chip U1. The signals contain information about whether the clamp valve has reached its opening and closing limit positions. After receiving the signals, the driver chip U1's internal logic circuit will make a judgment based on the signal level. Based on the judgment result of the input signal, the driver chip U1 generates corresponding control commands. If it is determined that the clamp valve needs to be clamped, the driver chip U1 will output a forward rotation control signal; if it is determined that the clamp valve needs to be released, it will output a reverse rotation control signal; if the clamp valve has reached the appropriate position and no action is required, it will output a stop signal.

[0036] The driver chip U1 accurately controls the forward and reverse rotation and stop of the motor M1 based on the signal from the position sensing module, enabling the pinch valve to precisely reach the limit position of opening or closing, thus improving the control accuracy of the pinch valve and ensuring that it performs the opening and closing actions according to the predetermined requirements. In addition, the capacitor C5 plays a filtering role in the circuit, ensuring the stability of the output signal of the driver chip U1, while the fuse F1 plays an overcurrent protection role in the circuit. When the current is too large, it melts in time to protect the motor and the driver chip, thereby improving the reliability and safety of the entire drive module 4.

[0037] like Figure 6 As shown, this embodiment also includes a power status detection module 5 and a manual setting module 6. The input terminal of the power status detection module 5 is electrically connected to the output terminal of the power input module 1 to detect the voltage on / off state. The input terminal of the manual setting module 6 is electrically connected to the output terminal of the power status detection module 5, and the output terminal is electrically connected to the input terminal of each of the first logic control units 32 to set the default opening and closing state of the pinch valve when the power is off, and restore it to the default state when the power is off.

[0038] The power status detection module 5 in this embodiment includes a second input protection unit 51 and a second logic control unit 52. The input terminal of the second input protection unit 51 is electrically connected to the output terminal of the first fuse 11 and is used for voltage division and current limiting of external input voltage. The input terminal of the second logic control unit 52 is electrically connected to the output terminal of the second input protection unit 51 and is used to output a corresponding level signal according to the external power supply on / off state.

[0039] Specifically, the second input protection unit 51 in this embodiment includes a diode D3, a resistor R11, a resistor R12, a Zener diode D4, a resistor R6, and a NAND gate U2C. The positive terminal of the diode D3 is electrically connected to the other end of the fuse F2 and the resistor R3, respectively. The negative terminal of the diode D3 is electrically connected to the resistor R11. The other end of the resistor R11 is electrically connected to the resistor R12, the negative terminal of the Zener diode D4, and one input terminal of the NAND gate U2C, respectively. The other end of the resistor R12 is grounded together with the positive terminal of the Zener diode D4. One end of the resistor R6 is electrically connected to the other input terminal of the NAND gate U2C, and the other end of the resistor R6 is connected to the power supply VCC.

[0040] It should be noted that the external input voltage enters the power status detection module 5 after passing through the first fuse 11. First, diode D3 performs unidirectional conduction to prevent reverse voltage from damaging subsequent circuits. Resistors R11 and R12 form a voltage divider circuit to divide the input voltage, reducing the voltage amplitude to suit the processing range of subsequent circuits. Simultaneously, resistors R11 and others also play a current-limiting role, preventing excessive current from flowing into subsequent components. Zener diode D4 regulates the divided voltage, ensuring that the voltage input to the NAND gate U2C remains stable within a certain range, avoiding the impact of voltage fluctuations on logic judgment. The second logic control unit 52 receives the signal output from the second input protection unit 51 and the reference voltage signal. When the external power is on, the voltage signal after voltage division, current limiting, and regulation, along with the reference voltage, performs logical operations within the NAND gate U2C. When power is detected on, a corresponding level signal is output; when the external power is off, a low-level signal is output.

[0041] In this embodiment, the second logic control unit 52 can accurately determine the on / off state of the external power supply and output the corresponding level signal, providing accurate power status information for the subsequent manual setting module 6 and the control of the entire system, enabling the system to make the correct response according to the power situation.

[0042] The manual setting module 6 in this embodiment includes at least two switch switching units 61. The input terminals of the at least two switch switching units 61 are electrically connected to the output terminal of the second logic control unit 52, and are used to set and switch the default opening and closing state when the pinch valve is de-energized. The output terminals of the at least two switch switching units 61 are electrically connected to the input terminals of the corresponding first logic control unit 32.

[0043] Specifically, the manual setting module 6 in this embodiment includes two single-pole double-throw switches SW1. The output terminal of the NAND gate U2C is electrically connected to the first connection terminal of the two single-pole double-throw switches SW1 respectively. The third connection terminal of the two single-pole double-throw switches SW1 is electrically connected to one input terminal of the NAND gate U2C. The second connection terminal of the two single-pole double-throw switches SW1 is electrically connected to the other input terminals of the NAND gate U2A and the NAND gate U2B respectively.

[0044] It should be noted that the single-pole double-throw switch SW1 has three connection terminals, and its connection status can be changed manually. Users can operate the switch according to their needs. If it is desired that the pinch valve is in the open state when the power is off, the switch can be switched to a specific position, so that the signal is transmitted from the first connection terminal to the second connection terminal, and then connected to the other input terminal of NAND gate U2A or U2B. If it is desired that the pinch valve is in the closed state when the power is off, the switch can be switched to another position, so that the signal transmission path is changed. The signal after the switch is switched is output from the second connection terminal of the single-pole double-throw switch SW1 to the other input terminal of NAND gate U2A and NAND gate U2B respectively. NAND gates U2A and U2B combine with other signals received earlier to perform logical rule calculations, and finally output control signals to the subsequent drive module, thereby controlling the pinch valve to return to the set default open and closed state when the power is off.

[0045] In this embodiment, the manual setting module 6 can accurately control the action of the pinch valve according to the preset default state when the power supply is abnormally interrupted, thus avoiding safety problems that may be caused by the uncertainty of the pinch valve state due to power interruption.

[0046] like Figure 7 As shown, this embodiment also includes an energy storage power supply module 7, wherein the input terminal of the energy storage power supply module 7 is electrically connected to the output terminal of the output protection unit 24 and the input terminals of at least two position sensor units 31, and the output terminal of the energy storage power supply module 7 is electrically connected to the power supply terminal of the drive control unit 41, for providing temporary power when power is lost.

[0047] Specifically, the energy storage power supply module 7 in this embodiment includes a resistor R4, a supercapacitor C4, a supercapacitor C5, a capacitor C3, a logic chip U2E, and a capacitor C2. The other end of the resistor 10 is electrically connected to the power input terminals of the resistor R4, capacitor C3, logic chip U2E, capacitor C2, and driver chip U1, respectively. The other end of the resistor R4 is electrically connected to the positive terminal of the supercapacitor C4. The negative terminal of the supercapacitor C4 is electrically connected to the positive terminal of the supercapacitor C5. The negative terminal of the supercapacitor C5 is grounded together with the other end of the capacitor C3 and the ground terminal of the logic chip U2E. The other end of the capacitor C2 is grounded.

[0048] It should be noted that when the power supply is normal, the electrical energy output by the output protection unit 24 charges supercapacitors C4 and C5 through resistor R4. Resistor R4 acts as a current limiter to prevent excessive charging current from damaging the supercapacitors and ensures a smooth charging process. At the same time, capacitors C3 and C2 also charge when the power supply is normal, playing a role in filtering and stabilizing the voltage, providing a stable power environment for subsequent circuits. When the external power supply is interrupted, the output protection unit 24 stops outputting electrical energy. At this time, supercapacitors C4 and C5 begin to discharge, providing temporary power to the position sensing module 3 and the drive module 4.

[0049] In this embodiment, the energy storage power supply module 7 provides temporary power to the drive control unit 41 when power is off, so that the drive control unit 41 has enough time to adjust the clamp valve to the preset default opening and closing state, avoiding safety problems that may be caused by the uncertainty of the clamp valve state due to a sudden power interruption, and ensuring the safety and reliability of the system in the event of a power outage.

[0050] Working principle: An external power supply is connected to the circuit through the connection terminal J, and then connected to the voltage conversion module 2 and the power status detection module 5 through the fuse F2. The power status detection module 5 detects the power supply status in real time, and the AND gate U2C determines the power supply status based on the processed voltage signal and outputs the corresponding level signal. An external power supply enters the voltage conversion module 2 and is stepped down to 5V to power the position sensing module 3, the drive module 4, and the energy storage power supply module 7. At least two position sensor units 31 of the position sensing module 3 are respectively set at the opening and closing limit positions of the pinch valve. When the sensing part on the pinch valve approaches, the Hall sensor outputs a low-level signal. The first logic control unit 32 receives the low-level signal output by the position sensor unit 31, determines whether the opening and closing limit positions of the pinch valve are reached, and outputs a corresponding signal. The drive control unit 41 of the drive module 4 receives the signal output by the first logic control unit 32, and the internal logic circuit determines the state of the pinch valve based on the signal level. Meanwhile, at least two switch switching units 61 of the manual setting module 6 are used to set the default opening and closing state of the pinch valve when it is de-energized. The user manually operates the switch to change the signal transmission path. The NAND gates U2A and U2B are combined with other signals to perform logical operations and output control signals to the drive module 4 so that the pinch valve can be restored to the set state when it is de-energized. At this time, the power supply module 7 provides power to the pinch valve when it is de-energized.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drive control system for an electrically operated opening and closing pinch valve, characterized in that, It includes a power input module (1), a voltage conversion module (2), a position sensing module (3), and a drive module (4), wherein, One end of the power input module (1) is electrically connected to the output terminal of the external power supply, and the other end is electrically connected to the input terminal of the voltage conversion module (2). The voltage conversion module (2) is used to step down the voltage of the external power supply. The voltage conversion module (2) includes a first input protection unit (21), a voltage conversion control unit (22), a power supply unit (23), and an output protection unit (24), wherein, The output terminal of the first fuse (11) is electrically connected to the input terminal of the first input protection unit (21) for current limiting and filtering of external input voltage; The input terminal of the voltage conversion control unit (22) is electrically connected to the output terminal of the first input protection unit (21) to convert the voltage after current limiting and filtering into the required voltage. The input terminal of the power supply unit (23) is electrically connected to the output terminal of the voltage conversion control unit (22) to store electrical energy and provide energy buffer for the voltage conversion control unit (22); The input terminal of the output protection unit (24) is electrically connected to the output terminal of the power supply unit (23) to prevent the output voltage from reversing. The input terminal of the position sensing module (3) is electrically connected to the output terminal of the voltage conversion module (2) to detect whether the opening and closing limit positions of the pinch valve are in place and output the corresponding detection signals. The input end of the drive module (4) is electrically connected to the output end of the position sensing module (3) to drive the pinch valve to perform opening and closing actions according to the detection signal.

2. The drive control system for the electrically operated opening and closing pinch valve as described in claim 1, characterized in that: The power input module (1) includes a connection terminal and a first fuse (11). One end of the connection terminal is electrically connected to the external power output terminal, and the other end is electrically connected to the first fuse (11) to protect the entire control circuit.

3. The drive control system for the electrically operated opening and closing pinch valve as described in claim 2, characterized in that: The voltage conversion module (2) further includes a feedback unit (25), wherein one end of the feedback unit (25) is electrically connected to the output end of the power supply unit (23), and the other end is electrically connected to the feedback end of the voltage conversion control unit (22), for feeding back the output voltage to the voltage conversion control unit (22).

4. The drive control system for the electrically operated opening and closing pinch valve as described in claim 3, characterized in that: The position sensing module (3) includes at least two position sensor units (31) and a first logic control unit (32), wherein, At least two position sensor units (31) are respectively set at the opening and closing limit positions of the pinch valve, and the input terminals of at least two position sensor units (31) are electrically connected to the output terminal of the output protection unit (24) to detect the opening and closing limit positions of the pinch valve respectively and output a low-level signal. The input terminals of at least two first logic control units (32) are electrically connected to the output terminals of the corresponding position sensor units (31) to receive the low-level signals output by the position sensor units (31) and determine whether the opening and closing limit positions of the pinch valve are in place.

5. The drive control system for the electrically operated opening and closing pinch valve as described in claim 4, characterized in that: The drive module (4) includes a drive control unit (41) and a motor (42), wherein, The output terminals of at least two first logic control units (32) are electrically connected to the input terminal of the drive control unit (41) to control the forward and reverse rotation and stop state of the motor according to the input signal; The input end of the motor (42) is electrically connected to the output end of the drive control unit (41) to drive the motor (42) to perform the opening and closing action of the clamp valve.

6. The drive control system for the electrically operated opening and closing pinch valve as described in claim 5, characterized in that: It also includes a power status detection module (5) and a manual setting module (6), wherein, The input terminal of the power status detection module (5) is electrically connected to the output terminal of the power input module (1) to detect the voltage on / off state; The input terminal of the manual setting module (6) is electrically connected to the output terminal of the power status detection module (5), and the output terminal is electrically connected to the input terminal of each first logic control unit (32) to set the default opening and closing state of the pinch valve when the power is off, and restore it to the default state when the power is off.

7. The drive control system for the electrically operated opening and closing pinch valve as described in claim 6, characterized in that: The power status detection module (5) includes a second input protection unit (51) and a second logic control unit (52). The input terminal of the second input protection unit (51) is electrically connected to the output terminal of the first fuse (11) for voltage division and current limiting of external input voltage; The input terminal of the second logic control unit (52) is electrically connected to the output terminal of the second input protection unit (51) and is used to output the corresponding level signal according to the external power supply on / off state.

8. The drive control system for the electrically operated opening and closing pinch valve as described in claim 7, characterized in that: The manual setting module (6) includes at least two switch switching units (61). The input terminals of the at least two switch switching units (61) are electrically connected to the output terminal of the second logic control unit (52) to set and switch the default opening and closing state when the pinch valve is de-energized. The output terminals of the at least two switch switching units (61) are electrically connected to the input terminals of the corresponding first logic control unit (32).

9. The drive control system for the electrically operated opening and closing pinch valve as described in claim 6, characterized in that: It also includes an energy storage power supply module (7), wherein the input terminal of the energy storage power supply module (7) is electrically connected to the output terminal of the output protection unit (24) and the input terminals of at least two position sensor units (31), and the output terminal of the energy storage power supply module (7) is electrically connected to the power supply terminal of the drive control unit (41) to provide temporary power when power is off.

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