Detection device for automatically detecting water quality of electroplating rinsing bath

Abstract

The utility model discloses a detection device for automatically detecting water quality of an electroplating rinsing bath. The detection device mainly comprises a warning lamp, a display, a pH sensor, a conductivity tester, a first probe, an electromagnetic valve, an insulating shell, a power supply, a water pipe, a liquid level sensor, a bath body, a water pump, a water storage tank, a second probe, a first controller and a second controller. The device is mainly used in the aluminum oxidation washing process, the acid-base concentration and the ion concentration in the electroplating washing tank are detected in real time, the pH sensor and the conductivity tester are connected into a circuit in series through the wire, the acid-base concentration and ion concentration detection of the electroplating washing tank, linkage waste water discharging and automatic water supplementing are integrated, automatic water changing control can be completely achieved, and the production efficiency is improved. The normal operation of the electroplating process is ensured, and the workpiece quality is ensured not to be polluted.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a device for detecting pH value and ion concentration of an aqueous solution in an electroplating washing tank. Background Art

[0002] The existing anodizing water washing tank lacks water quality detection devices. Workers can only judge whether to replace the water solution based on experience, and cannot accurately control the water replacement time. During the aluminum oxidation process, if the water in the water washing tank contains excessive chloride ions or other impurity ions, the workpiece will be seriously contaminated during the water washing process, affecting the quality of the coating, greatly reducing its service life, and causing immeasurable damage and impact. The utility model designs a detection device for automatically detecting the water quality of the electroplating water washing tank, which can detect the acid-base concentration and ion concentration in the electroplating water washing tank. When the acid-base concentration or ion concentration exceeds the standard, the warning light will light up, and the solenoid valve will be controlled to open to discharge the waste water. The liquid level sensor and the controller can cooperate to control the switch of the water pump to ensure the timely replacement of pure water in the water tank, so that the electroplating process can proceed normally, effectively ensure the quality of the liquid in the tank, provide huge benefits for industrial production, and be convenient and fast. Utility Model Content

[0003] The purpose of the utility model is to address the problem that the existing electroplating water washing tank lacks a water quality detection device. Workers can only judge whether to replace the water solution based on experience, but cannot accurately control the water replacement time. An automatic water replacement device for an electroplating water washing tank is designed, which can detect the acid-base concentration and ion concentration in the electroplating water washing tank. When the acid-base concentration or the ion concentration exceeds the standard, a warning light is turned on, and the solenoid valve is controlled to open to discharge the waste water. The liquid level sensor cooperates with the second controller to control the switch of the water pump. While discharging the waste water, the replacement of pure water in the tank is guaranteed, so that the electroplating process can proceed normally.

[0004] The technical scheme of the utility model is: a warning light, a display, a pH sensor (MT-500), a conductivity tester (DDSJ-318), a power supply, a water pipe, a liquid level sensor (DLL-100), a tank body, a water pump, a water storage tank, a first controller, a second controller, and a solenoid valve (D-SUB).

[0005] The display can display the pH value and the conductivity value measured by the pH sensor and the conductivity tester.

[0006] The solenoid valve (D-SUB) is an industrial device controlled by electromagnetics. It is a basic component for controlling fluid automation and belongs to an actuator, not limited to hydraulic and pneumatic. It is used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. The solenoid valve (D-SUB) can be used with different circuits to achieve the desired control, and the control accuracy and flexibility can be guaranteed.

[0007] The controller mentioned above refers to a device used to control or adjust mechanical, electrical and other systems. It refers to a main command device that changes the wiring of the main circuit or control circuit and changes the resistance value in the circuit in a predetermined order to control the start, speed regulation, braking and reversal of the motor. It is composed of a program counter, an instruction register, an instruction decoder, a timing generator and an operation controller. It uses sensors to collect data, performs information processing and logical operations through smart chips, and finally outputs control signals to achieve control or adjustment of the target device.

[0008] The pH sensor (MT-500) is a sensor used to detect the hydrogen ion concentration in the object being measured and convert it into a corresponding usable output signal. It can accurately measure the pH value of water and display it on the display. The pH sensor also has the characteristics of wide measurement range, fast response, good stability, strong anti-interference ability, easy maintenance and operation, and strong adaptability.

[0009] The conductivity tester (DDSJ-318) can accurately measure the conductivity value of water and display it on the display. The higher the conductivity of pure water, the higher the content of impurity ions in the water. When the conductivity rises to a certain value, the conductivity tester will send out a corresponding alarm signal.

[0010] The liquid level sensor (DLL-100) is a pressure sensor for measuring liquid level.

[0011] Preferably, the liquid level sensor is a photoelectric liquid level sensor, which is a new type of contact point liquid level measurement and control device developed based on the principle of reflection and refraction of light at the interface of two different media; it has the advantages of simple structure, high positioning accuracy, no mechanical parts, no need for debugging, high sensitivity and corrosion resistance, low power consumption, etc.

[0012] Preferably, the pH sensor (MT-500), the conductivity tester (DDSJ-318) and the first controller are connected in series via a wire. When the pH value and the conductivity of the pure water exceed the standard, a signal will be transmitted to the first controller, and the first controller will release an output signal to cause the warning light to light up, and at the same time control the solenoid valve (D-SUB) to open, so that the waste water is discharged in time.

[0013] Preferably, the pH sensor (MT-500) and the conductivity tester (DDSJ-318) are connected in series via a wire and fixed in the middle of the inner side of the electroplating water washing tank.

[0014] Preferably, the warning light is connected in series with the display via a wire, and the warning light will light up when the pH value displayed on the display exceeds 7.5 or is lower than 6.5, or when the conductivity deviates from the set range of the pure water conductivity value.

[0015] Preferably, the first controller (AC500-S) adopts a combinational logic controller, which consists of three parts: a timing circuit, an instruction decoding circuit and a combinational logic circuit. The type of signal instructions input by the pH sensor (MT-500) and the conductivity tester (DDSJ-318), the number of instructions, and the format and function of each instruction are specified in advance. The instruction currently being executed is determined by the instruction decoder, and combined with the beat generated by the timing circuit, the corresponding control signal is output as the input result of the combinational logic circuit to control the switch of the solenoid valve (D-SUB). The combinational logic controller is composed of complex combinational logic gate circuits and triggers, and has a fast execution speed.

[0016] Preferably, the second controller (CPU224XP) adopts a PID controller. The so-called PID control is a means to make the controlled physical quantity quickly and accurately approach the control target in a closed-loop control system. By feedback control of parameters such as the flow rate, pressure or water level of the water pump, not only can the PID controller realize automatic control of the water pump, but also can perform real-time dynamic control according to the flow rate, pressure and liquid level of the water pump to control the flow rate, pressure, etc. of the water pump.

[0017] Preferably, the parameters of the PID controller can be automatically adjusted through intelligent adjustment or self-correction, adaptive algorithm.

[0018] Preferably, the liquid level sensor (DLL-100) cooperates with the second controller to control the switch of the water pump to ensure that the liquid level of the pure water in the washing tank is at a position two-thirds of the distance from the bottom surface.

[0019] Preferably, the solenoid valve (D-SUB) is connected to the pH sensor (MT-500) and the conductivity tester (DDSJ-318) via a wire, and the pH sensor (MT-500) and the conductivity tester (DDSJ-318) can sensitively control the switch of the solenoid valve (D-SUB).

[0020] Preferably, the liquid level sensor (DLL-100) cooperates with the second controller to be connected to the water pump via a wire, and the liquid level sensor (DLL-100) can sensitively control the water pump to pump water.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] This device is mainly used in the aluminum oxidation washing process to detect the acid and alkali concentration and ion concentration in the electroplating washing tank in real time. The pH sensor and the conductivity tester are connected in series to the circuit with a wire. When the pH value and conductivity of the pure water exceed the standard, the input signal is input to the first controller (AC500-S), converted into an output signal, and the warning light is controlled to light up. At the same time, the solenoid valve (D-SUB) is controlled to open and the sewage is discharged in time; the liquid level sensor and the second controller (CPU224XP) are connected in series to jointly control the switch of the water pump, which not only ensures the replacement of pure water in the water tank, but also adopts PID The controller, whose parameters can be automatically adjusted through intelligent adjustment or self-correction, adaptive algorithm, through feedback control of parameters such as water pump flow, pressure or water washing tank liquid level, not only can the PID controller be used to realize automatic control of the water pump, but also can perform real-time dynamic control according to the water pump flow, pressure and liquid level, control the water pump flow, pressure, etc., to achieve precise control; the utility model integrates the acid and alkali concentration and ion concentration detection of the electroplating water washing tank, linked wastewater discharge and automatic water replenishment, and can fully realize automatic control of water change, ensure the normal progress of the electroplating process, and ensure that the quality of the workpiece is not contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of an automatic water changing device for an electroplating washing tank;

[0024] Figure 2 A circuit diagram for automatic water replacement in an electroplating washing tank;

[0025] Figure 1 In: 1. Warning light; 2. Display; 3. pH sensor; 4. Conductivity tester; 5. First probe; 6. Solenoid valve; 7. Insulation shell; 8. Power supply; 9. Water pipe; 10. Liquid level sensor; 11. Tank; 12. Water pump; 13. Water tank; 14. Second probe; 15. First controller; 16. Second controller;

[0026] Figure 2 In: 1. Warning light; 2. Display; 3. pH sensor; 4. Conductivity tester; 6. Solenoid valve; 10. Liquid level sensor; 12. Water pump; 15. First controller; 16. Second controller. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0028] The model of the pH sensor is MT-500; the model of the conductivity tester is DDSJ-318; the model of the liquid level sensor is DLL-100; the model of the first controller is AC500-S; the model of the second controller is CPU224XP; and the model of the solenoid valve is D-SUB.

[0029] The pH sensor (MT-500), conductivity tester (DDSJ-318), liquid level sensor (DLL-100), solenoid valve (D-SUB), second controller (CPU224XP), and first controller (AC500-S) mentioned in the utility model can be obtained in the market or by private order.

[0030] The warning light is fixed on the top of the display; the pH sensor and the conductivity tester are fixedly installed in the middle of the inner side of the electroplating water washing tank, the display is fixed on the top of the outer side of the tank, and the pH sensor is fixedly installed on the right side of the conductivity tester; the pH sensor, the conductivity tester, and the first controller are connected in series through wires, marked as line one; the warning light and the display are connected in series through wires and connected to the output end of the first controller, marked as line three; the solenoid valve is connected to the output end of the first controller through a wire, marked as line four; line three and line four are connected in parallel, and line three and line four are connected to line one through a wire; the first probe is fixedly installed at the tail of the pH sensor The first probe of the pH sensor and the second probe of the conductivity tester are both immersed below the liquid surface; the liquid level sensor, the water pump and the second controller are connected in series through wires, marked as line two; line one and line two are connected in parallel, and the power supply is connected to the circuit through wires; the first controller is fixed on the top of the solenoid valve, and the second controller and the first controller are covered with insulating shells, the liquid level sensor is fixed on the upper inner side of the tank body, the second controller is fixed on the left side of the water pump, and the water pump is fixed on the bottom of the water tank; a water pipe is installed above the tank body, the water pipe is connected to the water pump flange, and the water tank is placed outside the tank body.

[0031] After the power is turned on, turn on the switch, the pH sensor (MT-500) and the conductivity tester (DDSJ-318) start real-time testing, and signals are continuously transmitted to the first controller. The first controller (AC500-S) compiles the input signal and releases the output signal to the display, warning light and solenoid valve. When the pH value in the washing tank exceeds 7.5 or is lower than 6.5, or the conductivity deviates from the set range of the pure water conductivity value, the first controller (AC500-S) will control the warning light to light up and control the solenoid valve (D-SUB) to open and discharge sewage. At the same time, the liquid level sensor (DLL-100) senses the drop in liquid level and releases a signal to the second controller (CPU224XP). After the second controller (CPU224XP) compiles and releases the output signal, it controls the water pump to turn on the switch to supply water to the washing tank.

[0032] It should be further explained that this device is mainly used in the aluminum oxidation washing process to detect the acid and alkali concentration and ion concentration in the electroplating washing tank in real time. The pH sensor (MT-500) and the conductivity tester (DDSJ-318) are connected in series to the circuit with a wire. When the pH value and conductivity of the pure water exceed the standard, the input signal is input to the first controller (AC500-S), converted into an output signal, and the warning light is controlled to light up. At the same time, the solenoid valve (D-SUB) is controlled to open and the sewage is discharged in time; the liquid level sensor (DLL-100) is connected in series with the second controller (CPU224XP) to jointly control the switch of the water pump. Only the replacement of pure water in the water tank is guaranteed, and a PID controller is used, whose parameters can be automatically adjusted through intelligent adjustment or self-correction, and adaptive algorithm. Through feedback control of parameters such as the flow rate, pressure or liquid level of the water pump or the water washing tank, not only the PID controller can realize automatic control of the water pump, but also real-time dynamic control can be performed according to the flow rate, pressure and liquid level of the water pump to control the flow rate, pressure, etc. of the water pump for accurate control. The utility model integrates acid and alkali concentration and ion concentration detection of the electroplating water washing tank, linked wastewater discharge and automatic water replenishment, and can fully realize automatic control of water change, ensure the normal progress of the electroplating process, and ensure that the quality of the workpiece is not contaminated.

Claims

1. A detection device for automatically detecting water quality in an electroplating washing tank, mainly comprising: a warning light (1), a display (2), a pH sensor (3), a conductivity tester (4), a first probe (5), a solenoid valve (6), an insulating shell (7), a power supply (8), a water pipe (9), a liquid level sensor (10), a tank body (11), a water pump (12), a water storage tank (13), a second probe (14), a first controller (15), and a second controller (16); characterized in that : The warning light (1) is fixed on the top of the display (2); the pH sensor (3) and the conductivity tester (4) are fixedly installed in the middle of the inner side of the electroplating water washing tank (11), the display (2) is fixed on the outer top of the tank (11), and the pH sensor (3) is fixedly installed on the right side of the conductivity tester (4); the pH sensor (3), the conductivity tester (4), and the first controller (15) are connected in series through a wire, marked as line one; the warning light (1) and the display (2) are connected in series through a wire and connected to the output end of the first controller (15), marked as line three; the solenoid valve (6) is connected to the output end of the first controller (15) through a wire, marked as line four; line three and line four are connected in parallel, and line three and line four are connected to line one through a wire; the first probe (5) is fixedly installed at the pH sensor (3), the conductivity tester (4), and the first controller (15) are connected in series through a wire, marked as line three; the solenoid valve (6) is connected to the output end of the first controller (15) through a wire, marked as line four; line three and line four are connected in parallel, and line three and line four are connected to line one through a wire; the first probe (5) is fixedly installed at the pH sensor (3), the conductivity tester (4), and the first controller (15) are connected in series through a wire. The second probe (14) is fixedly mounted on the tail of the conductivity tester (4); the first probe (5) of the pH sensor (3) and the second probe (14) of the conductivity tester (4) are both immersed below the liquid surface; the liquid level sensor (10), the water pump (12) and the second controller (16) are connected in series via a wire, marked as line two; line one and line two are connected in parallel, and the power supply (8) is connected to the circuit via a wire; the first controller (15) is fixed to the electromagnetic The second controller (16) and the first controller (15) are covered with an insulating shell (7) on the top of the valve (6), the liquid level sensor (10) is fixedly placed on the upper inner side of the tank body (11), the second controller (16) is fixedly installed on the left side of the water pump (12), and the water pump (12) is fixedly placed on the bottom of the water storage tank (13); a water pipe (9) is installed above the tank body (11), the water pipe (9) and the water pump (12) are flange-connected together, and the water storage tank (13) is placed outside the tank body (11).

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