A method for automatically washing and dehydrating copper flexible connectors after pickling and pH closed-loop control

Abstract

The application relates to the fields of industrial automation control and metal surface treatment technology, and discloses a copper soft connecting piece automatic water washing and dehydration pH closed loop control method after pickling, which further comprises the following steps: step one, system initialization, entering an automatic operation mode; step two, water injection and low-speed rotation cleaning; step three, real-time pH monitoring; step four, pH value judgment; step five, stopping water injection; step six, braking and stopping; and step seven, ending material taking. The copper soft connecting piece automatic water washing and dehydration pH closed loop control method after pickling uses a drainage pipe to carry a pH electrode to build a real-time acid-base degree feedback closed loop to set a cleaning judgment logic, uses a waste liquid stable pH value as the only standard for water washing termination, eliminates neutralization quality deviation caused by manual experience judgment, and guarantees that the acid-base degree of batch copper soft connecting pieces after cleaning is stable and up to the standard.

Description

Technical Field

[0001] This invention relates to the fields of industrial automation control and metal surface treatment technology, specifically to a closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling. Background Technology

[0002] Copper flexible connectors, including components such as copper braided strips and flexible copper busbars, are widely used in electrical conductive connections. After the workpiece undergoes an acid pickling process to remove the surface oxide layer, acidic residues remain in the gaps and on the surface. If not adequately neutralized and cleaned, these residues can corrode subsequent processing equipment and reduce the quality of electroplated and welded products. Conventional industry solutions rely on dehydration equipment combined with water washing, while traditional processes involve manual operation for workpiece rinsing and dehydration.

[0003] In traditional production, operators can only rely on visual observation and fixed-duration timing to determine whether the workpiece cleaning meets the standards. They cannot accurately detect the actual pH level of residual acid inside the workpiece's crevices, often resulting in incomplete neutralization. Residual acidic liquid not only corrodes subsequent equipment on the production line but also severely impacts the yield of finished products in subsequent electroplating and welding processes for copper flexible connectors. To avoid substandard cleaning, continuous running water is commonly used to rinse workpieces without intelligent water shut-off logic, leading to significant waste of clean water and high production water costs. The entire process relies on frequent manual start-stop of equipment and handling of wet, slippery workpieces, resulting in extremely low automation and significantly increasing worker workload. Furthermore, close-range operation of high-speed rotating dehydration equipment and handling of heavy, wet objects greatly increases the risk of mechanical injuries such as crushing and impacts. Human error caused by manual intervention cannot be eliminated, making it difficult to guarantee consistent cleaning quality across batches of products.

[0004] Therefore, an automatic water washing and dehydration pH closed-loop control method for copper flexible connectors after acid pickling is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an automatic water washing and dehydration pH closed-loop control method for copper flexible connectors after acid pickling. This method solves the problems of traditional processes relying on manual experience to determine the cleaning endpoint, lack of acid-base closed-loop control leading to unstable product neutralization quality, serious waste of water resources during continuous water rinsing, low degree of automation, and prominent safety hazards of manual operation.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, further comprising the following steps: Step 1: Placing the pickled copper flexible connector workpiece with pH < 7 inside the dehydrator, and the operator issues a start command by clicking the start button on the touch screen of the control cabinet; Step 2: After receiving the start command, the PLC controller built into the control cabinet synchronously drives the actuator: opening the water inlet valve, allowing clean water to flow into the dehydrator's inner tank through the water inlet pipe; simultaneously starting the drive motor to rotate the inner tank of the dehydrator, synchronously completing the water injection and rotational rinsing; Step 3: The pH electrode installed on the drain pipe collects the pH analog signal of the discharged waste liquid in real time, and transmits the converted digital pH detection value to the PLC controller in the control cabinet in real time; Step 4: The PLC in the control cabinet has pre-stored customizable... The system compares the real-time pH value with the preset target pH threshold for logical judgment. Step 5: If the real-time pH value is less than the preset target pH threshold, the control cabinet keeps the inlet valve open and the drive motor running continuously, cyclically performing water washing and pH monitoring. If the real-time pH value is greater than or equal to the preset target pH threshold, it is determined that the workpiece has been cleaned and neutralized. The control cabinet closes the inlet valve to stop water supply and controls the drive motor to increase its speed to enter the high-speed spin-drying process. Step 6: The control cabinet's built-in timer keeps track of the high-speed spin-drying process. After the timer reaches the preset spin-drying time on the touch screen, a braking signal is sent to the drive motor to activate the matching braking component, causing the inner tank of the dehydrator to stop rotating quickly. Step 7: After the machine stops, the green indicator light on the control cabinet flashes continuously, indicating that the operation is complete. The operator can then remove the neutralized and dehydrated copper flexible connector.

[0007] Preferably, in step two, the water inlet valve continuously supplies water, and the drive motor drives the inner tank of the dehydrator to rotate synchronously. The water flow and centrifugal force work together to dynamically rinse the gaps and residual acid on the surface of the copper flexible connector.

[0008] Preferably, the touch screen has a parameter setting interface, which allows users to customize input parameters such as target pH threshold, high-speed spin-drying duration, high-speed spin-drying speed of the drive motor, pH value stability detection duration, water flow monitoring alarm threshold, deceleration time, and watering start and end inspection times.

[0009] Preferably, the pH electrode is a pipeline-type online pH transmitter, which is sealed and installed in the middle section of the drain pipe to monitor the acidity and alkalinity of the wastewater discharged from the washing process in real time and continuously feed back pH data to the control cabinet PLC.

[0010] Preferably, the drive motor is equipped with a frequency converter and a braking resistor. The frequency converter adjusts the drive motor to distinguish between the low-speed rotation gear for washing and the high-speed rotation gear for spin drying. The braking resistor works with the brake to achieve rapid braking and stopping of the inner tank.

[0011] Preferably, the control cabinet is equipped with a PLC controller and the touch screen is a human-machine interface screen. The two are connected by a communication bus to realize parameter reading and writing, real-time pH value display, equipment operation status feedback and fault alarm output.

[0012] Preferably, the control system has a built-in water flow monitoring function, and the touch screen displays the water flow rate of the inlet pipe in real time; when the inlet valve fails and no water flows out, or the flow rate is lower than the preset threshold, the control cabinet triggers an audible and visual water flow alarm to indicate that the inlet valve is faulty.

[0013] Preferably, the touch screen has a manual and automatic mode switching function; in automatic mode, the closed-loop water washing and dehydration process of steps one to seven is fully executed; in manual mode, the inlet valve opening and closing, the drive motor starting and stopping, the high-speed spin drying triggering, and the pH monitoring can be started and stopped independently.

[0014] Preferably, the pH closed-loop judgment logic has a pH stability time parameter. The control cabinet PLC needs to continuously collect detection data that meet the pH ≥ target threshold within the stable time before it can determine that the cleaning is qualified and enter the high-speed spin-drying process, so as to avoid misjudgment caused by instantaneous pH fluctuations.

[0015] Beneficial effects Compared with the prior art, the present invention provides an automatic water washing and dehydration pH closed-loop control method for copper flexible connectors after pickling, which has the following beneficial effects: 1. The automatic water washing and dehydration pH closed-loop control method for copper flexible connectors after acid pickling utilizes a pH electrode mounted on the drain pipe to establish a real-time acid-base feedback closed-loop setting for cleaning judgment logic. The stable pH value of the waste liquid is used as the sole criterion for terminating the water washing, eliminating the neutralization quality deviation caused by manual experience judgment and ensuring that the acid-base stability of batch copper flexible connectors meets the standards after cleaning.

[0016] 2. The automatic water washing and dehydration pH closed-loop control method for copper flexible connectors after acid pickling utilizes the PLC linkage in the control cabinet to set up an on-demand water supply mechanism for the water inlet valve. Water is continuously injected only when the pH of the waste liquid does not reach the neutral threshold, and the water circuit is automatically shut off after the standard is met. This method abandons the traditional continuous water rinsing mode, significantly reduces the water consumption of the cleaning process, and saves production water costs.

[0017] 3. The automatic water washing and dehydration pH closed-loop control method for the copper flexible connector after pickling utilizes a touch screen human-machine interface terminal to set up a fully automatic operation program. After one-button start, it automatically completes the entire process of water injection cleaning, pH monitoring, high-speed spin drying, and braking shutdown. No manual operation is required throughout the process, reducing labor intensity and avoiding the mechanical injury safety hazards caused by personnel operating the rotating equipment at close range.

[0018] 4. The automatic water washing and dehydration pH closed-loop control method for the copper flexible connector after pickling utilizes a dual-speed graded operation and stable shutdown structure with a drive motor, a frequency converter, and a braking resistor. During the water washing stage, the low-speed rotation washes away residual acid in the gaps of the workpiece. After the cleaning is qualified, the high-speed dehydration is switched on, and the machine is quickly braked and stopped after the spin-drying is completed. This method balances the cleaning and rinsing effect, dehydration efficiency, and equipment operation safety. Attached Figure Description

[0019] Figure 1 This is a flowchart of an automatic water washing and dehydration pH closed-loop control method for copper flexible connectors after acid pickling, as proposed in this invention. Figure 2 This is a schematic diagram of the overall structure of an automatic water washing and dehydration system for a copper flexible connector after acid pickling, as proposed in this invention.

[0020] In the diagram: 1. Main body of the dehydrator; 2. Inner tank of the dehydrator; 3. Inlet pipe; 4. Inlet valve; 5. Drain pipe; 6. pH electrode; 7. Drive motor; 8. Control cabinet; 9. Touch screen. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 Please see Figure 2 As shown, an automatic water washing and dehydration device for copper flexible connectors after acid pickling includes a dehydrator body 1, a dehydrator inner tank 2, a water inlet pipe 3, a water inlet valve 4, a drain pipe 5, a pH electrode 6, a drive motor 7, a control cabinet 8, and a touch screen 9. The inner tank 2 of the dehydrator is coaxially mounted in the internal cavity of the dehydrator body 1, and the inner tank 2 can rotate relative to the dehydrator body 1; the water inlet pipe 3 is mounted on the top of the dehydrator body 1, and the water inlet valve 4 is connected in series on the water inlet pipe 3. The water outlet end of the water inlet pipe 3 extends into the interior of the dehydrator body 1 and supplies water to the inner tank 2; the bottom of the dehydrator body 1 is connected to the drain pipe 5, and the middle section of the drain pipe 5 is sealed with a pH electrode 6, which is in contact with the drain water flow; the drive motor 7 is fixedly mounted on the outside of the dehydrator body 1, and the output shaft of the drive motor 7 is connected to the inner tank 2 for transmission, so as to drive the inner tank 2 to rotate; The control cabinet 8 is located on the side of the main body 1 of the dehydrator, and the touch screen 9 is connected to the control cabinet 8 for communication. The inlet valve 4, pH electrode 6, and drive motor 7 are electrically connected to the PLC inside the control cabinet 8. The pH electrode 6 transmits the collected pH detection signal to the control cabinet 8. The control cabinet 8 outputs control signals to control the opening and closing of the inlet valve 4, the speed and start and stop of the drive motor 7, and the touch screen 9 realizes parameter setting and equipment status display.

[0023] In this embodiment: When the equipment is running, the acid-washed copper flexible connector is placed into the inner tank 2 of the dehydrator. The operator issues a start command through the touch screen 9, and the control cabinet 8 simultaneously opens the water inlet valve 4 to supply water and starts the drive motor 7 to rotate the inner tank 2 of the dehydrator at low speed. The water flow and centrifugal force work together to wash away the residual acid on the workpiece. When the cleaning waste liquid flows through the drain pipe 5, the pH electrode 6 collects the acidity and alkalinity signal in real time and uploads it to the control cabinet 8. The PLC continuously compares the real-time pH with the preset threshold. If the pH does not meet the standard, the water washing continues. After reaching the neutral standard, the control cabinet 8 closes the water inlet valve 4 and controls the drive motor 7 to switch to the high-speed gear for timed spin drying. After spin drying, the inner tank 2 is quickly braked by the braking resistor and the brake. The green light flashes to indicate that the material is ready for removal. On the one hand, it eliminates the need for manual timing and judgment, ensuring uniform neutralization and quality of the workpiece. Water is supplied on demand, which greatly saves clean water resources. On the other hand, one-button fully automatic operation reduces manual operation and avoids mechanical damage caused by close-range operation of rotating equipment. At the same time, the variable frequency graded speed regulation takes into account both the cleaning and rinsing effect and the dehydration efficiency.

[0024] Example 2 Please see Figure 1 As shown, an automatic water washing and dehydration pH closed-loop control method for copper flexible connectors after pickling uses the dehydration equipment in Example 1 and further includes the following steps: Step 1: Place the pickled copper flexible connector workpiece with pH < 7 inside the inner tank 2 of the dehydrator. The operator issues the start command by clicking the start button on the touch screen 9 of the control cabinet 8. Step 2: After receiving the start command, the built-in PLC controller in the control cabinet 8 synchronously drives the actuator: the water inlet valve 4 is opened, and clean water is introduced into the inner tank 2 of the dehydrator through the water inlet pipe 3; at the same time, the drive motor 7 is started to drive the inner tank 2 of the dehydrator to rotate, and the water injection and rotation rinsing are completed synchronously. Step 3: The pH electrode 6 installed on the drain pipe 5 collects the pH analog signal of the discharged waste liquid in real time, and transmits the converted digital pH detection value to the PLC controller in the control cabinet 8 in real time. Step 4: The control cabinet's 8PLC has a pre-stored customizable target pH threshold. The real-time collected pH value is compared with the preset target pH threshold for logical judgment. Step 5: If the real-time pH value is less than the preset target pH threshold, the control cabinet 8 will keep the water inlet valve 4 open and the drive motor 7 will continue to run, and the water washing and pH monitoring will be performed in a cycle; if the real-time pH value is greater than or equal to the preset target pH threshold, it is determined that the workpiece cleaning and neutralization has met the standard, the control cabinet 8 will close the water inlet valve 4 to stop the water supply, and control the drive motor 7 to increase the speed to enter the high-speed spin drying process. Step 6: The built-in timer in the control cabinet 8 keeps track of the high-speed spin-drying process. Once the timer reaches the preset spin-drying time on the touch screen 9, a braking signal is sent to the drive motor 7 to activate the matching braking components and quickly stop the rotation of the inner drum 2 of the dehydrator. Step 7: After the machine stops, the green indicator light on control cabinet 8 will flash continuously, indicating that the operation is complete. The operator can then remove the copper flexible connector that has been neutralized and dehydrated.

[0025] In step two, the water inlet valve 4 continuously supplies water, and the drive motor 7 drives the inner tank 2 of the dehydrator to rotate synchronously. The water flow and centrifugal force work together to dynamically rinse the gaps and residual acid on the surface of the copper flexible connector.

[0026] The touch screen 9 has a parameter setting interface, which allows users to customize input parameters such as target pH threshold, high-speed spin-drying time, high-speed spin-drying speed of drive motor 7, pH value stability detection time, water flow monitoring alarm threshold, deceleration time, watering start and end inspection time.

[0027] pH electrode 6 is a pipeline-type online pH transmitter, which is sealed and installed in the middle section of drain pipe 5. It monitors the acidity and alkalinity of the wastewater discharged from the washing process in real time and continuously feeds back pH data to the PLC in control cabinet 8.

[0028] The drive motor 7 is equipped with a frequency converter and a braking resistor. The frequency converter adjusts the drive motor 7 to distinguish between the low-speed rotation gear for washing and the high-speed rotation gear for spin drying. The braking resistor, in conjunction with the brake, enables the inner tank 2 of the dehydrator to brake and stop quickly.

[0029] The control cabinet 8 is equipped with a PLC controller, and the touch screen 9 is a human-machine interface screen. The two are connected by a communication bus to realize parameter reading and writing, real-time pH value display, equipment operation status feedback, and fault alarm output.

[0030] The control system has a built-in water flow monitoring function, and the touch screen 9 displays the water flow rate of the inlet pipe 3 in real time. When the inlet valve 4 fails and no water flows out, or the flow rate is lower than the preset threshold, the control cabinet 8 triggers an audible and visual water flow alarm to indicate that the inlet valve 4 is faulty.

[0031] The touchscreen 9 has manual and automatic mode switching functions; in automatic mode, it fully executes the closed-loop water washing and dehydration process from step one to step seven; in manual mode, it can independently control the opening and closing of the water inlet valve 4, the start and stop of the drive motor 7, independently trigger the high-speed spin drying, and independently start and stop the pH monitoring.

[0032] The pH closed-loop judgment logic has a pH stability time parameter. The control cabinet 8PLC needs to continuously collect detection data that meets the pH ≥ target threshold within the stability time before it can determine that the cleaning is qualified and enter the high-speed spin-drying process, so as to avoid misjudgment caused by instantaneous pH fluctuations.

[0033] In this embodiment: The entire process relies on the PLC in the control cabinet 8 to achieve closed-loop automatic pH control throughout the process. After startup, water injection and rotary washing are completed simultaneously. The pH electrode 6 on the drain pipe 5 continuously collects the acidity and alkalinity of the waste liquid as the basis for cleaning judgment. Only when the pH value is continuously and stably reached to the preset pH threshold will the water be automatically stopped and the high-speed spin-drying will be switched, effectively avoiding misjudgment caused by instantaneous water quality fluctuations and ensuring the stability of the cleaning quality of each batch of copper flexible connectors. The system can flexibly modify various process parameters through the touch screen 9, and also has water flow monitoring alarm, manual and automatic dual-mode switching functions. When the water inlet valve 4 is abnormally cut off, an audible and visual alarm will be set in time to facilitate rapid troubleshooting. The drive motor 7 relies on the frequency converter to achieve low-speed cleaning and high-speed spin-drying graded speed adjustment, and is equipped with a braking resistor for rapid shutdown, balancing the cleaning and rinsing effect and dehydration efficiency. The entire process does not require continuous manual observation or intervention in the start and stop of the equipment. Water supply on demand replaces the traditional continuous water rinsing, which significantly saves water resources, reduces the risk of mechanical injury caused by close-range manual operation of the rotating equipment, and greatly reduces the intensity of manual labor.

[0034] Working principle: This equipment uses the built-in PLC in the control cabinet 8 as the core control unit. It relies on the main body of the dewatering machine 1, the inner tank of the dewatering machine 2, the water inlet pipe 3, the water inlet valve 4, the drain pipe 5, the pH electrode 6, the drive motor 7, and the touch screen 9 to form a mechanical, water circuit and electrical closed-loop linkage system. The overall workflow is divided into seven major links: feeding and starting, synchronous water washing, real-time pH acquisition, threshold logic judgment, high-speed spin drying, braking and stopping, and human-machine monitoring and protection. The whole process is automated and closed-loop operation.

[0035] The operator places the copper flexible connectors with a pH < 7 after acid washing inside the inner tank 2 of the dehydrator. By clicking the start button on the touchscreen 9 human-machine interface, the start command is transmitted via the communication bus to the PLC inside the control cabinet 8. The system completes initialization and automatically switches to fully automatic operation mode. The touchscreen 9 has pre-stored all process parameters, including the target pH threshold, spin-drying time, motor speed, pH stabilization time, and water flow alarm threshold. These parameters can be customized as needed. It also supports manual / automatic mode switching. During maintenance, the inlet valve 4, drive motor 7, and pH electrode 6 can be controlled independently. This system uses the waste liquid pH value as the automatic control basis for starting and stopping the washing process, abandoning the traditional operation mode that relies on manual visual observation and fixed-duration rinsing. This eliminates errors caused by human judgment, ensuring a high degree of consistency in the batch of copper flexible connectors and cleaning quality, and preventing residual acid from corroding subsequent processing equipment and affecting the yield of electroplating and welding products.

[0036] Upon receiving the start signal, the PLC simultaneously issues two control commands: one command opens the inlet valve 4 on the inlet pipe 3, allowing clean water to continuously flow into the dewatering machine body 1 and rinse the workpieces in the inner tank 2; the other command controls the drive motor 7, equipped with a frequency converter, to output a low-speed setting, driving the inner tank 2 to rotate at a uniform speed. The water flow, combined with the centrifugal force generated by the rotation of the inner tank 2, continuously penetrates into the gaps of the copper flexible connectors, peeling off residual acidic liquid from the surface and crevices of the workpieces. The waste liquid generated during cleaning collects at the bottom of the dewatering machine body 1 and flows into the drain pipe 5 for discharge. The system achieves intelligent water supply on demand, continuously injecting water for cleaning only when the pH of the waste liquid does not reach the neutral standard, and automatically cutting off the water supply after the cleaning standard is met. This replaces the industry-standard continuous water rinsing method, effectively reducing clean water consumption, significantly lowering the water cost of the production line, and demonstrating outstanding water-saving performance.

[0037] The middle section of the drain pipe 5 is sealed with a pipeline pH electrode 6. When the waste liquid continuously flows through the electrode detection area, the pH electrode 6 captures the simulated acidity and alkalinity signal of the waste liquid in real time and converts the signal into a standardized digital pH value, which is continuously transmitted back to the PLC controller of the control cabinet 8 in real time, realizing dynamic monitoring of water quality throughout the entire washing process.

[0038] The PLC internally stores the neutral target pH threshold set by the operator via touchscreen 9, continuously comparing the real-time collected pH value with the preset threshold. Simultaneously, the system incorporates pH stabilization time judgment logic, preventing a single instance of meeting the standard from automatically deeming the workpiece acceptable. If the real-time pH value remains consistently below the target threshold, the PLC keeps the inlet valve 4 open and the drive motor 7 running at low speed, continuously circulating water for washing and pH collection. Only when the collected pH value remains consistently stable for a preset period, with each value ≥ the target threshold, does the system determine that the workpiece neutralization and cleaning is fully compliant, sending a switching command to the next process. This completely avoids misjudgments caused by water flow disturbances and instantaneous water quality fluctuations.

[0039] Once the pH level stabilizes and meets the standard, the PLC immediately sends a command to close the inlet valve 4, cutting off the clean water supply and stopping the washing process. Simultaneously, the inverter output level is adjusted to increase the speed of the drive motor 7, causing the inner tank 2 of the dewatering machine to rotate at high speed. Relying on strong centrifugal force, the residual moisture on the surface of the workpiece is spun dry. The built-in timer in the control cabinet 8 starts timing synchronously, and the timing duration is taken from the preset spin-drying parameters on the touch screen 9. The equipment supports one-button fully automatic closed-loop operation. The entire process of washing, pH monitoring, high-speed spin-drying, and braking and stopping does not require continuous manual monitoring, which greatly reduces the labor intensity of workers. At the same time, it reduces the mechanical injuries caused by squeezing and bumping caused by close-range operation of the high-speed rotating inner tank of the dewatering machine, and greatly improves the safety of operation.

[0040] Once the high-speed spin-drying timer is complete, the PLC sends a braking signal to the brake resistor and brake of the drive motor 7. The braking component quickly locks the inner tank 2 of the dehydrator, achieving a smooth and rapid stop and preventing inertial idling. After the machine stops, the green indicator light on the control cabinet 8 flashes continuously, providing an audible and visual reminder to the operator that the current process is complete. The equipment can then be safely opened to remove the neutralized and dehydrated copper flexible connector. The drive motor 7 uses a variable frequency graded speed regulation logic. Low-speed rotation can thoroughly flush away residual acid in the gaps of the workpiece, while the high-speed setting achieves efficient dehydration, balancing cleaning effect and production efficiency. The system is equipped with a water flow monitoring audible and visual alarm, a manual debugging mode, and timely warnings for water circuit faults in the inlet valve 4. Equipment maintenance and daily operation are convenient, and the overall automation, water conservation, and safety performance are comprehensively optimized.

[0041] The control system has a built-in water flow monitoring module that collects the water flow data of the inlet pipe 3 in real time and displays it on the touch screen 9 interface. If the inlet valve 4 is blocked or the water supply is interrupted during operation, and the water flow is lower than the preset alarm threshold, the control cabinet 8 will immediately trigger an audible and visual water flow alarm to promptly remind the staff to check the water circuit fault of the inlet valve 4, prevent the workpiece from running dry and wearing out, and improve the safety of equipment operation.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, characterized in that, It also includes the following steps: Step 1: Place the pickled copper flexible connector workpiece with pH < 7 inside the dehydrator. The operator issues the start command by clicking the start button on the touch screen of the control cabinet. Step 2: After receiving the start command, the built-in PLC controller in the control cabinet synchronously drives the actuator: the water inlet valve is opened, and clean water is introduced into the inner tank of the dewatering machine through the water inlet pipe; at the same time, the drive motor is started to drive the inner tank of the dewatering machine to rotate, and the water injection and rotation rinsing are completed simultaneously. Step 3: The pH electrode installed on the drain pipe collects the simulated pH signal of the discharged waste liquid in real time, and transmits the converted digital pH detection value to the PLC controller in the control cabinet in real time. Step 4: The control cabinet PLC has a pre-stored customizable target pH threshold, and the real-time collected pH value is compared with the preset target pH threshold for logical judgment. Step 5: If the real-time pH value is less than the preset target pH threshold, the control cabinet will keep the water inlet valve open and the drive motor will continue to run, cyclically performing water washing and pH monitoring; if the real-time pH value is greater than or equal to the preset target pH threshold, it is determined that the workpiece cleaning and neutralization has met the standard, the control cabinet will close the water inlet valve to stop the water supply, and control the drive motor to increase the speed to enter the high-speed spin-drying process. Step Six: The built-in timer in the control cabinet keeps track of the high-speed spin-drying process. Once the timer reaches the preset spin-drying time on the touch screen, a braking signal is sent to the drive motor to activate the matching braking components and quickly stop the rotation of the inner drum of the dehydrator. Step 7: After the machine stops, the green indicator light on the control cabinet will flash continuously, indicating that the operation is complete. The operator can then remove the copper flexible connector that has been neutralized and dehydrated.

2. The method for automatic water washing and dehydration pH closed-loop control of copper flexible connectors after pickling according to claim 1, characterized in that: In step two, the water inlet valve continuously supplies water, and the drive motor drives the inner tank of the dehydrator to rotate synchronously. The water flow and centrifugal force work together to dynamically rinse the gaps and residual acid on the surface of the copper flexible connector.

3. A closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, as described in claim 1, is characterized in that: The touchscreen has a parameter setting interface, which allows users to customize input parameters such as target pH threshold, high-speed spin-drying duration, drive motor high-speed spin-drying speed, pH value stability detection duration, water flow monitoring alarm threshold, deceleration time, and watering start and end inspection times.

4. A closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, as described in claim 1, characterized in that: The pH electrode uses a pipeline-type online pH transmitter, which is sealed and installed in the middle of the drain pipe. It monitors the acidity and alkalinity of the wastewater discharged from the washing process in real time and continuously feeds back pH data to the control cabinet PLC.

5. A closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, as described in claim 1, characterized in that: The drive motor is equipped with a frequency converter and a braking resistor. The frequency converter adjusts the drive motor to distinguish between the low-speed rotation gear for washing and the high-speed rotation gear for spin drying. The braking resistor works with the brake to achieve rapid braking and stopping of the inner tank.

6. A closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, as claimed in claim 1, characterized in that: The control cabinet is equipped with a PLC controller and a human-machine interface screen. The two are connected via a communication bus to realize parameter reading and writing, real-time pH value display, equipment operation status feedback, and fault alarm output.

7. A closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, as claimed in claim 1, characterized in that: The control system has a built-in water flow monitoring function, and the touch screen displays the water flow rate in the inlet pipe in real time. When the inlet valve malfunctions and no water flows out, or the flow rate is lower than the preset threshold, the control cabinet triggers an audible and visual water flow alarm to indicate that the inlet valve is faulty.

8. A closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, as claimed in claim 1, characterized in that: The touchscreen has manual and automatic mode switching functions; in automatic mode, it fully executes the closed-loop water washing and dehydration process from step one to step seven; in manual mode, it can independently control the opening and closing of the water inlet valve, start and stop of the drive motor, independently trigger high-speed spin drying, and independently start and stop pH monitoring.

9. A closed-loop pH control method for automatic water washing and dehydration of copper flexible connectors after pickling, as claimed in claim 1, characterized in that: The pH closed-loop judgment logic has a pH stability time parameter. The control cabinet PLC needs to continuously collect detection data that meet the pH ≥ target threshold within the stable time before it can determine that the cleaning is qualified and enter the high-speed spin-drying process, so as to avoid misjudgment caused by instantaneous pH fluctuations.

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