Cleaning machine constant pressure tank automatic calibration device and cleaning machine liquid supplementing system comprising same

Abstract

The utility model discloses a cleaning machine constant pressure tank automatic calibration device and a cleaning machine liquid supplementing system comprising the same, and relates to the field of crystalline silicon battery piece production equipment, and the cleaning machine constant pressure tank automatic calibration device comprises a liquid supplementing detection barrel fixedly connected to the outside of a cleaning machine table; one end of the second liquid supplementing pipe is fixedly communicated with the liquid supplementing detection barrel, and the other end of the second liquid supplementing pipe penetrates through the cleaning machine table and is fixedly communicated with the bottom of the constant-pressure tank body; one end of the waste discharge pipe is fixedly connected and communicated with the bottom of the liquid supplementing detection barrel to form a waste discharge port, and the waste discharge pipe is used for emptying the chemical solution in the liquid supplementing detection barrel; the second pneumatic valve is arranged on the second liquid supplementing pipe and used for controlling connection / disconnection between the liquid supplementing detection barrel and the constant-pressure tank body; and the third pneumatic valve is arranged on the waste discharge pipe and is used for controlling the opening / closing of the waste discharge port. According to the utility model, the liquid supplementing safety, accuracy and efficiency of the cleaning machine are improved, the manual intervention is reduced, the contact risk of chemicals is reduced, and the measurement precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of crystalline silicon solar cell production equipment, and in particular to an automatic calibration device for a constant pressure tank of a cleaning machine and a cleaning machine replenishment system including the same. Background Technology

[0002] In the manufacturing process of crystalline silicon solar cells, wet-process tank cleaning machines play a crucial role. This equipment is responsible for preparing and replenishing the chemical solutions on the silicon wafers to ensure cell quality. During this process, chemicals enter the tank from a constant-pressure tank within the machine's replenishment system. The accuracy of the constant-pressure tank replenishment directly affects the accuracy of the process formulation, and consequently, the quality of the solar cells.

[0003] Traditional constant pressure tank replenishment systems suffer from inaccurate replenishment during prolonged automatic replenishment processes. This is primarily due to factors such as internal pressure fluctuations, pipe leaks, and valve wear. When replenishment accuracy deviates, manual flow calibration of the constant pressure tank is required. During calibration, personnel must enter the machine and manually measure the liquid using a measuring cup. This operation is not only inefficient but also poses significant safety hazards. Direct contact with chemicals can lead to leaks, splashes, and even poisoning or burns.

[0004] Furthermore, human error during manual calibration cannot be ignored. Because data needs to be measured and recorded manually, this process is susceptible to factors such as operator skill level and distraction, leading to inaccurate measurement results. This inaccuracy directly affects the quality of the solar cells, thereby impacting the efficiency of the entire production line and the product's market competitiveness.

[0005] Therefore, existing wet-type tank cleaning machine constant pressure tank replenishment systems have significant shortcomings in terms of automation, safety, and measurement accuracy. These problems not only increase production costs and reduce production efficiency but also pose a threat to the health and safety of workers. To address these technical issues, it is necessary to propose an automatic calibration device for the constant pressure tank of a cleaning machine and a cleaning machine replenishment system incorporating this device. The aim is to improve the automation level of the replenishment system through technological innovation, reduce manual intervention, improve measurement accuracy, ensure cell quality, and simultaneously protect worker safety. Utility Model Content

[0006] The purpose of this invention is to provide an automatic calibration device for a constant pressure tank of a cleaning machine and a cleaning machine replenishment system including the same, so as to solve the above-mentioned technical problems existing in the prior art.

[0007] To achieve the above objectives, in one aspect, this utility model provides an automatic calibration device for a constant pressure tank of a cleaning machine, comprising:

[0008] A replenishment and testing tank, which is fixed to the outside of the cleaning machine base;

[0009] The second replenishment pipe has one end fixedly connected to and connected to the replenishment detection tank, and the other end penetrates into the interior of the cleaning machine and is fixedly connected to the bottom of the constant pressure tank.

[0010] Waste discharge pipe, one end of which is fixedly connected to and connected to the bottom of the replenishment and testing tank to form a waste discharge port, for emptying the chemical solution in the replenishment and testing tank;

[0011] The second pneumatic valve is located on the second replenishment pipe and is used to control the connection / disconnection between the replenishment detection tank and the constant pressure tank.

[0012] The third pneumatic valve is located on the waste discharge pipe and is used to control the opening / closing of the waste discharge port.

[0013] Optionally, the liquid replenishment detection container has graduation lines marked on its body.

[0014] Optionally, the second pneumatic valve is electrically connected to an automatic sampling system, which controls the second pneumatic valve to open within a preset time interval.

[0015] Optionally, the third pneumatic valve is electrically connected to the automatic sampling system, and is controlled by the automatic sampling system to open at a preset time.

[0016] Optionally, a flow meter is installed on the waste discharge pipe, and the flow meter is electrically connected to the automatic sampling system.

[0017] On the other hand, the present invention also provides a cleaning machine replenishment system, including a constant pressure tank, a first inlet pipe fixedly connected to and connected to the bottom of the constant pressure tank, a first pneumatic valve provided on the first inlet pipe, and an automatic calibration device for the constant pressure tank of the cleaning machine as described in any of the above claims.

[0018] Optionally, a magnetostrictive level gauge is installed inside the constant pressure tank.

[0019] Optionally, the magnetostrictive level gauge includes a probe rod, a magnetic float, and a smart meter. The probe rod extends vertically into the constant pressure tank. The smart meter is fixed to one end of the probe rod outside the constant pressure tank. The magnetic float slides axially around the probe rod. A magnetostrictive wire is provided inside the probe rod, and a piezomagnetic sensor is connected to one end of the magnetostrictive wire.

[0020] Optionally, the cleaning machine's liquid replenishment system also includes an intelligent control module, which is equipped with a liquid inlet replenishment system and a sampling calibration system. The first pneumatic valve, the second pneumatic valve, the third pneumatic valve, and the magnetostrictive level gauge are all electrically connected to the intelligent control module.

[0021] The present invention discloses the following technical effects:

[0022] This invention relates to an automatic calibration device for a constant pressure tank in a cleaning machine and its replenishment system. Through technological innovation, it significantly improves the safety, efficiency, and accuracy of the crystalline silicon solar cell production process. The system reduces manual intervention through automated operation, avoiding direct contact with chemicals and thus lowering the risk of chemical hazards to operators. Simultaneously, the automated sampling and dispensing process greatly shortens flow calibration time and improves work efficiency. Furthermore, the unmanned calibration process ensures high accuracy of measurement results, reduces the occurrence of safety accidents such as chemical splashes, and further improves production efficiency and economic benefits, playing a crucial role in promoting the quality and safety of the entire production process. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0024] Figure 1 This is a schematic diagram of the automatic calibration device for the constant pressure tank of the cleaning machine according to an embodiment of the present invention;

[0025] In the diagram: 1. Constant pressure tank body; 2. Magnetostrictive level gauge; 21. Intelligent gauge head; 22. Detector rod; 23. Magnetic float; 3. First replenishment pipe; 4. First pneumatic valve; 5. Cleaning machine platform; 6. Second replenishment pipe; 7. Second pneumatic valve; 8. Replenishment detection tank; 9. Scale line; 10. Waste discharge pipe; 11. Third pneumatic valve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] First, it should be noted that this utility model device is applied to the cell cleaning process in the manufacturing process of crystalline silicon solar cells. The wet tank cleaning machine removes these substances by immersing the material to be treated (such as silicon wafers) in a specific chemical solution, causing the solution to react chemically with contaminants or areas to be etched on the material surface. This chemical reaction can involve oxidation, corrosion, and dissolution of contaminants, organic debris, and metal ion contamination on the silicon surface.

[0028] Existing wet scrubbing tank cleaning machines typically employ PLC-controlled automatic liquid replenishment. The equipment uses a level detection device to obtain the real-time liquid level in the constant pressure tank and automatically adds and replenishes liquid. However, in actual use, prolonged automatic replenishment can lead to abnormal replenishment accuracy, necessitating periodic flow calibration of the constant pressure tank. During calibration, the wet scrubbing tank cleaning machine requires manual entry into the machine to manually measure the liquid using a measuring cup, which is not only inefficient but also poses significant safety hazards. To address this issue, this invention presents an automatic liquid replenishment calibration device to achieve safer and more convenient flow calibration. The aim of this automatic liquid replenishment calibration device is to make the calibration process of wet scrubbing tank cleaning machines safer and more efficient, reducing manual intervention, improving measurement accuracy, and lowering the safety risks for operators.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1 As shown, this utility model provides an automatic calibration device for a constant pressure tank of a cleaning machine, and a cleaning machine fluid replenishment system including the automatic calibration device for the constant pressure tank of the cleaning machine. Wherein, as... Figure 1As shown, the cleaning machine's liquid replenishment system includes a constant pressure tank and an automatic calibration device for the constant pressure tank connected below it. Specifically, the automatic calibration device includes a second liquid replenishment pipe 6, a second pneumatic valve 7, a liquid replenishment detection tank 8, a waste discharge pipe 10, and a third pneumatic valve 11. The constant pressure tank is located inside the cleaning machine base 5. A first liquid replenishment pipe 3 is connected to the lower part of the constant pressure tank body 1, and a first pneumatic valve 4 is installed on the first liquid replenishment pipe 3. One end of the second liquid replenishment pipe 6 is fixed to the lower part of the constant pressure tank body 1, and the other end passes through the cleaning machine base 5, extends outside the cleaning machine base 5, and connects to the liquid replenishment detection tank 8. The liquid replenishment detection tank 8 can be fixedly installed on the outer surface of the cleaning machine base 5. The second liquid replenishment pipe 6 connects the constant pressure tank and the liquid replenishment detection tank 8, and a second pneumatic valve 7 is installed on the second liquid replenishment pipe 6. The replenishment test tank 8 is made of a transparent material, such as PVC, and is a barrel-shaped container with graduation lines 9 marked on its body for easy and intuitive acquisition of the volume of the chemical solution inside. A waste discharge pipe 10 is fixedly connected to and connected to the bottom of the replenishment test tank 8. One end of the waste discharge pipe 10 is connected to a waste liquid recovery system (not shown in the figure), and the other end is located at the bottom of the replenishment test tank 8 to form a waste discharge port. A third pneumatic valve 11 is installed on the waste discharge pipe 10.

[0031] In this embodiment, the first replenishment pipe 3 is a tank replenishment pipe, one end of which is connected to the constant pressure tank 1, and the other end is connected to the cleaning tank of the cleaning machine, for conveying chemical solution into the cleaning tank. The first pneumatic valve 4 is used to control the opening and closing of the first replenishment pipe 3.

[0032] In this embodiment, the second replenishment pipe 6 is a replenishment pipe for the test tank. One end of the pipe is connected to the constant pressure tank body 1, and the other end is connected to the replenishment test tank 8. It is used to flow the calibration chemical solution into the replenishment test tank 8. The second pneumatic valve 7 is used to control the opening and closing of the second replenishment pipe 6.

[0033] In this embodiment, the waste discharge pipe 10 is used to discharge the chemical solution in the replenishment test tank 8 after calibration. One end of the pipe is connected to the replenishment test tank 8, and the other end is connected to the waste liquid recovery system. The third pneumatic valve 11 is used to control the opening and closing of the waste discharge pipe 10.

[0034] In one specific embodiment, the automatic calibration device for the constant pressure tank of the cleaning machine is equipped with an automatic sampling system. The automatic sampling system is electrically connected to the second pneumatic valve 7 and the third pneumatic valve 11, and can control the opening and closing of the second pneumatic valve 7 and the third pneumatic valve 11, as well as the opening time. By preset opening conditions (e.g., automatically opening at preset time intervals), the flow time of the chemical solution entering the replenishment detection tank 8 is intelligently controlled, thereby realizing the detection and calibration of the replenishment volume.

[0035] In one specific embodiment, a flow meter is installed on the waste discharge pipe 10, and the flow meter is electrically connected to the automatic sampling system.

[0036] In some alternative embodiments, the second pneumatic valve 7 and the first pneumatic valve 4 are pneumatic valves of the same model and are connected to the same pneumatic control mechanism, so that the two pneumatic valves can be independently controlled by the same pneumatic control mechanism.

[0037] In one specific embodiment, a magnetostrictive level gauge 2 is installed inside the constant pressure tank body 1 for continuous interface measurement of the liquid level inside the constant pressure tank. The magnetostrictive level gauge 2 includes a probe 22, a magnetic float 23, and a smart meter 21. The probe 22 extends vertically into the constant pressure tank body 1, and the smart meter 21 is fixed to one end of the probe 22 located outside the constant pressure tank body 1. The magnetic float 23 slides axially around the periphery of the probe 22. A magnetostrictive wire is provided inside the probe 22, and one end of the magnetostrictive wire is connected to a piezomagnetic sensor.

[0038] In one specific embodiment, the probe 22 is a non-magnetic sensing tube containing a magnetostrictive wire. A piezomagnetic sensor is connected to one end of the magnetostrictive wire. This piezomagnetic sensor is responsible for periodically emitting current pulses. These pulses propagate downwards along the magnetostrictive wire, generating a ring-shaped magnetic field around them. At the start of timing, the current pulse interacts with the magnetic field of the magnetic float, generating a torsional stress wave on the magnetostrictive wire. This torsional stress wave propagates at a specific speed from the float's position along the magnetostrictive wire towards both ends. The piezomagnetic sensor measures the time interval between the initial pulse and the returning torsional stress wave until it receives this torsional stress signal. Based on the magnitude of this time interval, the position of the float is determined. Since the float is always suspended on the liquid surface, and the position of the magnetic float 23 changes with the liquid level, the time interval corresponds to the liquid level. Then, a fully intelligent electronic device converts the time interval signal into a 4-20mA signal (HART) proportional to the measured liquid level for output.

[0039] In one specific embodiment, the cleaning machine's liquid replenishment system further includes an intelligent control module. This intelligent control module integrates a liquid replenishment system, a sampling and calibration system, and a pneumatic valve control system. The first pneumatic valve 4, the second pneumatic valve 7, the third pneumatic valve 11, and the magnetostrictive level gauge 2 are all electrically connected to the intelligent control module. The intelligent control module is the core component of the entire liquid replenishment system, possessing data acquisition, monitoring, and alarm functions. Users can set liquid level thresholds and replenishment intervals, and the system will automatically perform the replenishment operation.

[0040] In some optional implementations, the replenishment system is also equipped with inlet and outlet pressure sensors to monitor the actual pressure values ​​in the main pump's inlet and outlet lines. The controller adjusts the operating status of the replenishment pump based on these pressure values ​​to ensure a smooth replenishment process.

[0041] In some optional implementations, the intelligent control module in the fluid replenishment system fully supports the SECS / GEM communication protocol, allowing integration with other automation systems in the plant for a higher level of monitoring and control.

[0042] In some alternative implementations, the replenishment system also includes over-temperature protection and a leak sensor to prevent equipment overheating and chemical spills, further enhancing operational safety.

[0043] It should be understood that, in practical applications, the magnetostrictive level gauge 2 can also be other high-precision measuring instruments that can be used to monitor and control analog signal output, such as high-precision ultrasonic level gauges, photoelectric sensors, differential pressure level gauges, fiber optic level gauges, etc.

[0044] The working principle of the automatic calibration device for the constant pressure tank of the cleaning machine of this utility model:

[0045] This invention adds an automatic liquid replenishment and calibration device to the constant pressure tank of the existing wet trough cleaning machine. This device includes a liquid replenishment detection tank 8 located outside the machine, connected to the constant pressure tank via a second liquid replenishment pipe 6, allowing operation and observation without entering the machine. A magnetostrictive level gauge 2 is used to detect the liquid volume in the constant pressure tank, providing precise volume information. A pneumatic valve control system controls the opening and closing of pneumatic valves to regulate the flow of chemicals into the liquid replenishment detection tank 8, enabling flow and volume observation. During flow calibration, chemicals enter the liquid replenishment detection tank 8 through the second liquid replenishment pipe 6. The tank 8 is marked with graduations for easy reading of chemical volume. The chemical solution in the tank 8 is discharged through a third pneumatic valve 11 into the waste discharge pipe 10 and then into the waste discharge system. The entire process requires only manual operation of the software system for measurement; personnel do not need to enter the machine to remove pipes for measurement. Chemicals automatically flow into the liquid replenishment detection tank 8, and personnel can observe, record data, or modify parameters.

[0046] Compared with the prior art, the embodiments of this utility model disclose at least the following beneficial effects:

[0047] 1. Enhanced safety: This technology effectively solves the safety problem of personnel sampling chemical flow, avoids direct contact with chemicals, and reduces the risk of chemicals causing harm to personnel.

[0048] 2. Improved Efficiency: This invention reduces flow detection time and improves work efficiency. Due to its high degree of automation, it achieves automatic sampling and sorting, reducing manual intervention and making flow calibration faster.

[0049] 3. Improved measurement accuracy: Without human intervention, flow calibration is more accurate, improving measurement precision.

[0050] 4. Reduced accidents: Since personnel do not come into contact with chemicals, there have been no accidents resulting in injury from chemical splashes.

[0051] 5. Economic benefits: In practical applications, after installing this flow detection system, the machine flow calibration time is reduced by half, significantly improving production efficiency and economic benefits.

[0052] Through the description of this embodiment, its working principle, and its beneficial effects, it can be seen that the present invention improves the safety, efficiency, and accuracy of the constant pressure tank replenishment system of the wet-process tank cleaning machine in the production of crystalline silicon solar cells, which is of great significance for improving the quality and safety of the entire production process.

[0053] Any aspects of this utility model that are not detailed herein are conventional technical means well known to those skilled in the art.

[0054] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An automatic calibration device for a constant pressure tank of a cleaning machine, characterized in that, include: A replenishment detection tank (8) is fixed to the outside of the cleaning machine base (5); The second replenishment pipe (6) has one end fixedly connected to and connected to the replenishment detection tank (8), and the other end penetrates into the interior of the cleaning machine base (5) and is fixedly connected to the bottom of the constant pressure tank (1). Waste discharge pipe (10), one end of which is fixedly connected to and connected to the bottom of the replenishment detection tank (8) to form a waste discharge port, for emptying the chemical solution in the replenishment detection tank (8); The second pneumatic valve (7) is located on the second replenishment pipe (6) and is used to control the connection / disconnection between the replenishment detection tank (8) and the constant pressure tank body (1); The third pneumatic valve (11) is located on the waste discharge pipe (10) and is used to control the opening / closing of the waste discharge port.

2. The automatic calibration device for the constant pressure tank of the cleaning machine according to claim 1, characterized in that, The liquid replenishment test tank (8) has graduation lines (9) marked on its body.

3. The automatic calibration device for the constant pressure tank of the cleaning machine according to claim 1, characterized in that, The second pneumatic valve (7) is electrically connected to the automatic sampling system, which controls the second pneumatic valve (7) to open within a preset time interval.

4. The automatic calibration device for the constant pressure tank of the cleaning machine according to claim 3, characterized in that, The third pneumatic valve (11) is electrically connected to the automatic sampling system and is controlled by the automatic sampling system to open at a preset time.

5. The automatic calibration device for the constant pressure tank of the cleaning machine according to claim 3, characterized in that, A flow meter is installed on the waste discharge pipe (10), and the flow meter is electrically connected to the automatic sampling system.

6. A liquid replenishment system for a cleaning machine, comprising a constant pressure tank and a first inlet pipe fixedly connected to and communicating with the bottom of the constant pressure tank body (1), wherein a first pneumatic valve (4) is provided on the first inlet pipe, characterized in that, It also includes an automatic calibration device for the constant pressure tank of the cleaning machine as described in any one of claims 1-5.

7. The cleaning machine fluid replenishment system according to claim 6, characterized in that, The constant pressure tank (1) is equipped with a magnetostrictive level gauge (2).

8. The cleaning machine fluid replenishment system according to claim 7, characterized in that, The magnetostrictive level gauge (2) includes a probe rod (22), a magnetic float (23), and a smart meter (21). The probe rod (22) extends vertically into the constant pressure tank (1). The smart meter (21) is fixed to one end of the probe rod (22) outside the constant pressure tank (1). The magnetic float (23) slides axially around the probe rod (22). A magnetostrictive wire is provided inside the probe rod (22), and a piezomagnetic sensor is connected to one end of the magnetostrictive wire.

9. The cleaning machine fluid replenishment system according to claim 7, characterized in that, It also includes an intelligent control module, which is equipped with a liquid inlet and replenishment system and a sampling and calibration system. The first pneumatic valve (4), the second pneumatic valve (7), the third pneumatic valve (11) and the magnetostrictive level gauge (2) are all electrically connected to the intelligent control module.

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