A pre-painting treatment tank solution automatic transfer system

Abstract

The utility model belongs to the technical field before coating treatment, especially a kind of automatic transfer system of coating pretreatment tank liquor. The system includes predegreasing tank system, degreasing tank system, washing tank system, first pipeline system, second pipeline system and control system;Because the real-time monitoring of tank liquor liquid level height using pressure sensor, the start-stop of water pump in the process of tank liquor transfer, the automatic control of the opening and closing system of valve, the process does not need artificial intervention, ensure the accuracy of operation.After transfer is completed, each water pump and valve automatically restore to initial state, avoid the mistake caused by artificial operation possibly.

Description

Technical Field

[0001] This utility model belongs to the field of pre-coating treatment technology, and in particular to an automatic transfer system for pre-coating treatment tank liquid. Background Technology

[0002] In coating production lines, immersion pretreatment typically includes tanks for pre-degreasing, degreasing, ceramic coating (or silane, phosphating), and water washing for surface cleaning of workpieces. If a chemical-containing tank is damaged or leaks and requires repair, the solution must be transferred to a spare tank for storage. For coating line pretreatment, the water washing tank following the chemical tank is generally used as the spare tank for solution transfer. Another scenario involves periodically replacing the pre-degreasing and degreasing solutions after a certain period of use. The pre-degreasing solution typically has a lifespan half that of the degreasing tank. During replacement, the pre-degreasing solution is discarded, and the degreasing solution is transferred to the pre-degreasing tank for continued use, saving operating costs and reducing wastewater discharge.

[0003] When performing immersion pretreatment on large workpieces, the liquid tank volume is relatively large. If a separate high-flow-rate tank transfer pump is used, the equipment investment cost is high. Using a pump with a smaller flow rate results in insufficient tank transfer time. Furthermore, the pretreatment chemical washing station is equipped with various pipelines and valves for heating, replenishment, etc., which are difficult to identify and prone to misoperation. Therefore, a system is needed that can automatically transfer the tank solution in a short time, reducing the operational complexity and improving the automation level of the equipment. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic transfer system for pre-treatment tank liquid in coating.

[0005] The technical solution adopted by this invention to solve its technical problem is: An automatic transfer system for pretreatment solution in a coating process includes a pre-degreasing tank system, a degreasing tank system, a washing tank system, a first pipeline system, and a second pipeline system. The pre-degreasing tank system, degreasing tank system, and washing tank system each include a first output end, a second output end, and an input end. The first output end and input end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system are tightly connected to the first pipeline system through pipes. The second output end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system is tightly connected to the second pipeline system through pipes. The second pipeline system is tightly connected to the first pipeline system. The second output end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system is also tightly connected to the second pipeline system through pipes. The pre-degreasing tank system, degreasing tank system, and washing tank system can all perform pre-degreasing, degreasing, and agitation cleaning operations on workpieces immersed in the tank.

[0006] Furthermore, the first pipeline system includes a first electric butterfly valve for a pre-degreasing tank, a first electric butterfly valve for a degreasing tank, and a first electric butterfly valve for a washing tank. The first electric butterfly valve for the pre-degreasing tank is tightly connected to the first output end and the first input end of the pre-degreasing tank system. The first electric butterfly valve for the degreasing tank is tightly connected to the first output end and the first input end of the degreasing tank system. The first electric butterfly valve for the washing tank is tightly connected to the first output end and the first input end of the washing tank system. The first electric butterfly valves for the pre-degreasing tank, the degreasing tank, and the washing tank are connected in parallel through pipelines.

[0007] Furthermore, the pre-degreasing tank system includes a pre-degreasing circulating stirring water pump, a first manual butterfly valve for the pre-degreasing tank, a second manual butterfly valve for the pre-degreasing tank, a third manual butterfly valve for the pre-degreasing tank, a normally open electric butterfly valve for the pre-degreasing tank, a pressure gauge for the pre-degreasing tank, a fourth manual butterfly valve for the pre-degreasing tank, an electric ball valve for the pre-degreasing tank, and a pre-degreasing tank. The pre-degreasing tank is arranged vertically. The lower part of the pre-degreasing tank is tightly connected to the first manual butterfly valve. The first manual butterfly valve, the pre-degreasing circulating stirring water pump, and the second manual butterfly valve are sequentially and tightly connected to each other, forming the first output end of the pre-degreasing tank system. The third manual butterfly valve is tightly connected to the upper middle part of the pre-degreasing tank. The third manual butterfly valve of the pre-degreasing tank is tightly connected to the normally open electric butterfly valve of the pre-degreasing tank and forms the input end of the pre-degreasing tank system. The second manual butterfly valve and the normally open electric butterfly valve of the pre-degreasing tank are both tightly connected to the first electric butterfly valve of the pre-degreasing tank through pipelines. The pressure gauge of the pre-degreasing tank is installed on the pipeline between the second manual butterfly valve and the first electric butterfly valve of the pre-degreasing tank and can detect the pressure in the pipeline. The fourth manual butterfly valve and the electric ball valve of the pre-degreasing tank are both connected in parallel to the bottom of the pre-degreasing tank. The electric ball valve of the pre-degreasing tank forms the second output end of the pre-degreasing tank system. The fourth manual butterfly valve of the pre-degreasing tank can discharge the liquid at the bottom of the pre-degreasing tank. The degreasing tank system includes a degreasing tank circulating stirring water pump, a first manual butterfly valve, a second manual butterfly valve, a third manual butterfly valve, a normally open electric butterfly valve, a pressure gauge, a fourth manual butterfly valve, an electric ball valve, and a degreasing tank. The degreasing tank is arranged vertically. The lower part of the degreasing tank is tightly connected to the first manual butterfly valve. The first manual butterfly valve, the degreasing tank circulating stirring water pump, and the second manual butterfly valve are sequentially and tightly connected to form the first output end of the degreasing tank system. The third manual butterfly valve is tightly connected to the upper middle part of the degreasing tank. The third manual butterfly valve is tightly connected to the normally open electric butterfly valve of the degreasing tank and forms the input end of the degreasing tank system. The second manual butterfly valve and the normally open electric butterfly valve of the degreasing tank are both tightly connected to the first electric butterfly valve of the degreasing tank through pipelines. The pressure gauge of the degreasing tank is installed on the pipeline between the second manual butterfly valve and the first electric butterfly valve of the degreasing tank and can detect the pressure in the pipeline. The fourth manual butterfly valve and the electric ball valve of the degreasing tank are both connected in parallel and tightly connected to the bottom of the degreasing tank. The electric ball valve of the degreasing tank forms the second output end of the degreasing tank system. The fourth manual butterfly valve of the degreasing tank can discharge the liquid at the bottom of the degreasing tank. The washing tank system includes a washing tank circulating agitator pump, a first manual butterfly valve, a second manual butterfly valve, a third manual butterfly valve, a normally open electric butterfly valve, a pressure gauge, a fourth manual butterfly valve, an electric ball valve, and a washing tank. The washing tank is vertically oriented. The lower part of the washing tank is tightly connected to the first manual butterfly valve. The first manual butterfly valve, the washing tank circulating agitator pump, and the second manual butterfly valve are sequentially and tightly connected, each forming the first output end of the washing tank system. The third manual butterfly valve is tightly connected to the upper middle part of the washing tank. The third manual butterfly valve of the washing tank is tightly connected to the normally open electric butterfly valve of the washing tank and forms the input end of the washing tank system. The second manual butterfly valve and the normally open electric butterfly valve of the washing tank are both tightly connected to the first electric butterfly valve of the washing tank through pipelines. The pressure gauge of the washing tank is installed on the pipeline between the second manual butterfly valve and the first electric butterfly valve of the washing tank and can detect the pressure in the pipeline. The fourth manual butterfly valve and the electric ball valve of the washing tank are connected in parallel and are both tightly connected to the bottom of the washing tank. The electric ball valve of the washing tank forms the second output end of the washing tank system. The fourth manual butterfly valve of the washing tank can discharge the liquid at the bottom of the washing tank.

[0008] Furthermore, the second pipeline system includes a pneumatic diaphragm pump, a second pipeline ball valve, a second pipeline electric ball valve, a second pipeline pressure gauge, and a solenoid valve. The electric ball valves for the pre-degreasing tank, degreasing tank, and washing tank are connected in parallel and are all tightly connected to the second pipeline ball valve via pipelines. The input end of the pneumatic diaphragm pump is tightly connected to the second pipeline ball valve, and the second pipeline electric ball valve is tightly connected to the output end of the pneumatic diaphragm pump. The second pipeline electric ball valve is also tightly connected to the first pipeline. The solenoid valve is tightly connected to the air inlet end of the pneumatic diaphragm pump. The pneumatic diaphragm pump is used to transfer the tank liquid back to the first pipeline. The solenoid valve is used to control the on / off state of compressed air to start or stop the diaphragm pump. The second pipeline pressure gauge is installed on the output end of the pneumatic diaphragm pump and can monitor the output pressure of the pneumatic diaphragm pump.

[0009] Furthermore, the pneumatic diaphragm pump is a small-flow pump.

[0010] Furthermore, the system also includes a control system, which is electrically connected to the first and second pipeline systems. The control system can control the opening and closing of the first and second pipeline systems and perform rapid transfer of the tank liquid. The control system includes a touch screen, a controller, a pre-degreasing tank pressure level gauge, a degreasing tank pressure level gauge, and a washing tank pressure level gauge. The pre-degreasing tank pressure level gauge is tightly connected to the pre-degreasing tank and can detect the liquid level in the pre-degreasing tank in real time. The degreasing tank pressure level gauge is tightly connected to the degreasing tank and can detect the degreasing level in real time. The liquid level in the tank; the pressure level gauge of the washing tank is closely connected to the washing tank and can detect the liquid level in the washing tank in real time; the pressure level gauges of the pre-degreasing tank, the degreasing tank, and the washing tank are also connected to the controller, which transmits the liquid level data in the system. The controller can control all electric valves and water pumps in the pre-degreasing tank system, the degreasing tank, the washing tank system, the first pipeline system, and the second pipeline system through electrical signals. The touch screen is connected to the controller and can display the controller's control status and operating data. It can also be modified and the system can be started and stopped by touching the touch screen.

[0011] Furthermore, in the system, the pipe diameter connected to the ball valve is less than or equal to DN32, the pipe diameter connected to the butterfly valve is greater than DN32, and the pre-degreasing circulating stirring water pump, the degreasing tank circulating stirring water pump, and the washing tank circulating stirring water pump are all centrifugal pumps.

[0012] The advantages and positive effects of this invention are as follows: 1. Achieve rapid and thorough transfer of the tank solution. The tank solution transfer is accomplished using a combination of an agitator pump and a diaphragm pump, achieving rapid transfer while effectively saving on equipment configuration costs. The circulating agitator pump has a large flow rate, approximately 2 to 4 times the tank volume per hour, requiring about 13.5 to 27 minutes to transfer approximately 90% of the tank solution. The remaining 10% of the tank solution is quickly and thoroughly transferred using a small diaphragm pump.

[0013] 2. Simple operation, safe and reliable, and controllable within the system. Thanks to the use of pressure sensors for real-time monitoring of the tank solution level, the system automatically controls the start and stop of the water pumps and the opening and closing of valves during the transfer process, eliminating the need for human intervention and ensuring operational accuracy. After the transfer is complete, all water pumps and valves automatically return to their initial state, avoiding errors that could be caused by human operation.

[0014] 3. The system adopts a series and parallel structure, offering good scalability. The liquid tanks are connected in parallel, while the liquid tanks and stirring pumps are connected in series. The pneumatic diaphragm pumps and each liquid tank are connected in series to form a loop. More liquid tanks and their stirring pipelines can be connected in parallel as needed to form a liquid transfer system. Introducing a single pneumatic diaphragm pump into the system can also reduce equipment configuration costs.

[0015] 4. Wide adaptability to bath media. Pneumatic diaphragm pumps can effectively transport various corrosive, high-viscosity, and solid particle-containing bath solutions without shaft seal issues, preventing leakage and blockage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structural connection of the system of this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments. The following embodiments are descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0018] The various experimental operations involved in the specific embodiments are all conventional techniques in the field. For parts not specifically annotated in this document, those skilled in the art can refer to various commonly used reference books, scientific and technological documents or related instructions and manuals prior to the filing date of this invention to carry out the operations.

[0019] An automatic transfer system for pretreatment bath solutions, such as Figure 1As shown, the system includes a pre-degreasing tank system, a degreasing tank system, a washing tank system, a first pipeline system, and a second pipeline system. Each of the pre-degreasing tank system, degreasing tank system, and washing tank system includes a first output end, a second output end, and an input end. The first output end and input end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system are tightly connected to the first pipeline system via pipes. The second output end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system is tightly connected to the second pipeline system via pipes. The second pipeline system is tightly connected to the first pipeline system. The second output end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system is also tightly connected to the second pipeline system via pipes. All three systems are capable of performing pre-degreasing, degreasing, and agitation cleaning operations on workpieces immersed in the tanks. During operation, the liquid in each tank is controlled at the working level. The workpiece is immersed in the liquid in each tank in turn. The stirring pump agitates the liquid in the tank to form a directional water flow to rinse and clean the surface of the workpiece, removing the dirt from the surface of the workpiece.

[0020] In this embodiment, the first pipeline system includes a first electric butterfly valve 6 for a pre-degreasing tank, a first electric butterfly valve 16 for a degreasing tank, and a first electric butterfly valve 26 for a washing tank. The first electric butterfly valve 6 for the pre-degreasing tank is tightly connected to the first output and input ends of the pre-degreasing tank system. The first electric butterfly valve 16 for the degreasing tank is also tightly connected to the first output and input ends of the degreasing tank system. The first electric butterfly valve 26 for the washing tank is also tightly connected to the first output and input ends of the washing tank system. These three valves are connected in parallel via pipelines, enabling rapid transfer of the tank liquid within the first pipeline system. The electric butterfly valves can automatically and quickly open and close the corresponding pipeline systems, achieving control of the liquid flow direction.

[0021] In this embodiment, the pre-degreasing tank system includes a pre-degreasing tank circulating stirring water pump 1, a pre-degreasing tank first manual butterfly valve 2, a pre-degreasing tank second manual butterfly valve 3, a pre-degreasing tank third manual butterfly valve 4, a pre-degreasing tank normally open electric butterfly valve 5, a pre-degreasing tank pressure gauge 7, a pre-degreasing tank fourth manual butterfly valve 8, a pre-degreasing tank electric ball valve 9, and a pre-degreasing tank 36. The pre-degreasing tank 36 is arranged vertically. The lower part of the pre-degreasing tank 36 is tightly connected to the pre-degreasing tank first manual butterfly valve 2. The pre-degreasing tank first manual butterfly valve 2, the pre-degreasing tank circulating stirring water pump 1, and the pre-degreasing tank second manual butterfly valve 3 are sequentially and tightly connected to form the first output end of the pre-degreasing tank system. The pre-degreasing tank third manual butterfly valve 4 is tightly connected to the upper middle part of the pre-degreasing tank 36. Butterfly valve 4 is tightly connected to the normally open electric butterfly valve 5 of the pre-degreasing tank, forming the input end of the pre-degreasing tank system. Both the second manual butterfly valve 3 and the normally open electric butterfly valve 5 are tightly connected to the first electric butterfly valve 6 of the pre-degreasing tank via pipes (not labeled in the diagram). A pressure gauge 7 is installed on the pipe between the second manual butterfly valve 3 and the first electric butterfly valve 6 to detect the pressure within the pipe. The fourth manual butterfly valve 8 and the electric ball valve 9 are connected in parallel and tightly connected to the bottom of the pre-degreasing tank 36. The electric ball valve 9 forms the second output end of the pre-degreasing tank system. The fourth manual butterfly valve 8 can discharge the liquid from the bottom of the pre-degreasing tank 36, facilitating external collection and subsequent use. This ensures operational accuracy and avoids errors that may be caused by human error. Manual butterfly valves 2, 4, and 8 are installed at the input and output ends of the liquid tank to cut off the outflow of liquid from the tank. The flow rate of the stirring pump 1 can be adjusted by adjusting the opening of the manual butterfly valve 3. The electric butterfly valve 5 is kept open and is closed when it is necessary to transfer the liquid from the tank to the first outlet. The electric ball valve 9 is used to control the connection and disconnection between the second output end of the degreasing tank and the second pipeline system. The pressure gauge 7 is used to observe the pressure in the pipeline when the water pump is running to ensure that the water pump is operating normally.

[0022] In this embodiment, the degreasing tank system includes a degreasing tank circulating stirring water pump 11, a degreasing tank first manual butterfly valve 12, a degreasing tank second manual butterfly valve 13, a degreasing tank third manual butterfly valve 14, a degreasing tank normally open electric butterfly valve 15, a degreasing tank pressure gauge 17, a degreasing tank fourth manual butterfly valve 18, a degreasing tank electric ball valve 19, and a degreasing tank 37. The degreasing tank 37 is arranged vertically, and its lower part is tightly connected to the degreasing tank first manual butterfly valve 12. The degreasing tank first manual butterfly valve 12, the degreasing tank circulating stirring water pump 11, and the degreasing tank second manual butterfly valve 13 are sequentially and tightly connected to form the first output end of the degreasing tank system. The degreasing tank third manual butterfly valve 14 is tightly connected to the upper middle part of the degreasing tank 37. The degreasing tank is tightly connected to the normally open electric butterfly valve 15 and forms the input end of the degreasing tank system. Both the second manual butterfly valve 13 and the normally open electric butterfly valve 15 are tightly connected to the first electric butterfly valve 16 via pipes (not labeled in the figure). A pressure gauge 17 is installed on the pipe between the second manual butterfly valve 13 and the first electric butterfly valve 16 and can detect the pressure inside the pipe. The fourth manual butterfly valve 18 and the electric ball valve 19 are connected in parallel and tightly connected to the bottom of the degreasing tank 37. The electric ball valve 19 forms the second output end of the degreasing tank system. The fourth manual butterfly valve 18 can discharge the liquid from the bottom of the degreasing tank 37, facilitating external collection and subsequent use. This ensures operational accuracy and avoids errors that may be caused by human operation. Manual butterfly valves 12, 14, and 18 are installed at the input and output ends of the liquid tank to cut off the outflow of liquid from the tank. The flow rate of the stirring pump 11 can be adjusted by adjusting the opening of the manual butterfly valve 13. The electric butterfly valve 15 is kept open and is closed when it is necessary to transfer the liquid out of the tank through the first outlet. The electric ball valve 19 is used to control the connection and disconnection between the second output end of the degreasing tank and the second pipeline system. The pressure gauge 17 is used to observe the pressure in the pipeline when the water pump is running to ensure that the water pump is operating normally.

[0023] In this embodiment, the washing tank system includes a washing tank circulating agitator pump 21, a washing tank first manual butterfly valve 22, a washing tank second manual butterfly valve 23, a washing tank third manual butterfly valve 24, a washing tank normally open electric butterfly valve 25, a washing tank pressure gauge 27, a washing tank fourth manual butterfly valve 28, a washing tank electric ball valve 29, and a washing tank 38. The washing tank 38 is arranged vertically, and its lower part is tightly connected to the washing tank first manual butterfly valve 22. The washing tank first manual butterfly valve 22, the washing tank circulating agitator pump 21, and the washing tank second manual butterfly valve 23 are sequentially and tightly connected to form the first output end of the washing tank system. The washing tank third manual butterfly valve 24 is tightly connected to the upper middle part of the washing tank 38. The second manual butterfly valve 23 and the normally open electric butterfly valve 25 of the washing tank are tightly connected and constitute the input end of the washing tank system. Both the second manual butterfly valve 23 and the normally open electric butterfly valve 25 are tightly connected to the first electric butterfly valve 26 of the washing tank via pipes (not labeled in the figure). A pressure gauge 27 is installed on the pipe between the second manual butterfly valve 23 and the first electric butterfly valve 26 of the washing tank and can detect the pressure inside the pipe. The fourth manual butterfly valve 28 and the electric ball valve 29 of the washing tank are connected in parallel and are both tightly connected to the bottom of the washing tank 38. The electric ball valve 29 constitutes the second output end of the washing tank system. The fourth manual butterfly valve 28 can discharge the liquid at the bottom of the washing tank 38, facilitating external collection and subsequent use. This ensures operational accuracy and avoids errors that may be caused by human operation. Manual butterfly valves 22, 24, and 28 are installed at the input and output ends of the liquid tank to cut off the outflow of liquid from the tank. The flow rate of the stirring pump 21 can be adjusted by adjusting the opening of the manual butterfly valve 23. The electric butterfly valve 25 is kept open and is closed when it is necessary to transfer the liquid from the tank to the first outlet. The electric ball valve 29 is used to control the connection and disconnection between the second output end of the degreasing tank and the second pipeline system. The pressure gauge 27 is used to observe the pressure in the pipeline when the water pump is running to ensure that the water pump is operating normally.

[0024] In this embodiment, the second pipeline system includes a pneumatic diaphragm pump 31, a second pipeline ball valve 32, a second pipeline electric ball valve 33, a second pipeline pressure gauge 34, and a solenoid valve 35. The pre-degreasing tank electric ball valve 9, the degreasing tank electric ball valve 19, and the washing tank electric ball valve 29 are connected in parallel and are all tightly connected to the second pipeline ball valve 32 via pipelines. The input end of the pneumatic diaphragm pump 31 is tightly connected to the second pipeline ball valve 32. The second pipeline electric ball valve 33 is connected to the pneumatic diaphragm pump 31. The output end is tightly connected, and the second pipeline electric ball valve 33 is also tightly connected to the first pipeline. The solenoid valve 35 is tightly connected to the air inlet end of the pneumatic diaphragm pump 31. The tank liquid is input back to the first pipeline for transfer through the pneumatic diaphragm pump 31. The solenoid valve 35 is used to control the on / off of compressed air to start or stop the diaphragm pump. The pressure gauge 34 of the second pipeline is installed on the output end of the pneumatic diaphragm pump 31, so that the operator can monitor the output pressure of the pneumatic diaphragm pump 31. The second piping system is used to transfer the remaining liquid at the bottom of the tank. This liquid contains more impurities and particles. Utilizing the wide media adaptability and lack of mechanical seals of the pneumatic diaphragm pump, this relatively turbid liquid can be transported, ensuring the reliability of the system and preventing liquid leakage. Solenoid valve 35 is used to control the on / off of compressed air connected to the pneumatic diaphragm pump, and to pneumatically or stop the operation of the pneumatic diaphragm pump. The opening and closing of electric ball valves 9, 19, and 29 can control the transfer of liquid from the corresponding tank. Electric ball valve 33 is used to control the on / off of the first and second piping systems, and automatically opens when transferring liquid from the bottom of the tank.

[0025] Preferably, the pneumatic diaphragm pump 31 is a small flow pump, which saves costs while completing the flow transfer. It is used for the transfer of tank liquid when the liquid level is low. Through the diaphragm pump's ability to suck up air, it ensures that all tank liquid is transferred out.

[0026] In this embodiment, the system further includes a control system (not shown in the figure). The control system is connected to the first pipeline system and the second pipeline system via electrical signals. The control system can control the opening and closing of the first pipeline system and the second pipeline system, and perform rapid transfer of the tank liquid. The control system includes a touch screen (not shown in the figure), a controller (not shown in the figure), a pre-degreasing tank pressure level gauge 10, a degreasing tank pressure level gauge 20, and a washing tank pressure level gauge 30. The pre-degreasing tank pressure level gauge 10 is tightly connected to the pre-degreasing tank 36 and can detect the liquid level in the pre-degreasing tank 36 in real time. The degreasing tank pressure level gauge 20 is tightly connected to the degreasing tank 37 and can detect the liquid level in the degreasing tank 37 in real time. Liquid level; the pressure level gauge 30 of the washing tank is tightly connected to the washing tank 38, and the pressure level gauge 30 of the washing tank can detect the liquid level in the washing tank 38 in real time; the pressure level gauges 10 of the pre-degreasing tank, 20 of the degreasing tank, and 30 of the washing tank are also connected to the controller, which transmits the liquid level data in the system. The controller can control all electric valves and water pumps in the pre-degreasing tank system, degreasing tank system, washing tank system, first pipeline system, and second pipeline system through electrical signals to achieve automatic control, which also facilitates inspection and maintenance by the staff. The touch screen is connected to the controller, and the touch screen can display the control status and operating data of the controller, and can modify and control the start and stop of the system through touch, which is convenient for the staff to operate.

[0027] Preferably, in the system, the pipe diameter connected to the ball valve is less than or equal to DN32, and the pipe diameter connected to the butterfly valve is greater than DN32. The circulating stirring water pumps 1, 11, and 21 in the pre-degreasing tank system, degreasing tank system, and washing tank system are all centrifugal pumps, which are suitable for fluid transportation applications with large flow rate and low head.

[0028] Example 1 During operation, when transferring tank liquid, the control system is activated, initiating its pre-set program. The system performs checks on all valves and liquid levels; only after passing these checks can subsequent procedures be executed. Otherwise, an audible and visual alarm signal is issued to indicate a fault. Liquid level sensors on each tank detect the corresponding tank level, determining whether the transfer-in or transfer-out conditions are met. The transfer-out tank level must be greater than the set value, and the transfer-in tank level must be 0 (i.e., empty) before the corresponding water pump can be activated. The system also checks that all electric valves are in their initially set normally open or normally closed states.

[0029] When the start-up conditions are met, such as transferring the pre-degreasing tank solution to the washing tank, the electric ball valve 5 will automatically close first, and the electric butterfly valves 6 and 26 will open. Valve 25 will remain open, and the electric ball valves 19, 29, and 33 will remain closed. The circulating stirring water pump 1 will automatically start, and the pre-degreasing solution will flow into the washing tank through the manual butterfly valves 2, 3, 6, 26, 25, and 24. The remaining tank solution accounts for approximately 10% of the total volume. That is, when the pre-degreasing tank solution level drops to the set level (e.g., 50mm above the pump suction pipe), the circulating stirring water pump 1 and the electric butterfly valve 6 will automatically close, and the electric ball valves 9, 33, 35, and 5 will open. The pneumatic diaphragm pump 31 will transfer the remaining tank solution to the washing tank until the solution level is zero. Then, the electric ball valves 9, 33, 35, and 26 will close, completing the transfer of the pre-degreasing tank solution.

[0030] Similarly, when it is necessary to transfer the degreasing liquid in the washing tank back to the pre-degreasing tank, the program will automatically execute the corresponding process, completing the start and stop of the corresponding water pumps and the opening and closing of the valves.

[0031] Example 2 Taking the cleaning of a degreasing tank as an example: When the degreasing tank needs cleaning and maintenance, the water in the washing tank should first be drained by opening the manual butterfly valve 28. After draining, close the manual butterfly valve 28. The pressure level gauge 30 checks that the liquid level in the washing tank is zero, indicating that the tank liquid is ready for transfer. On the control system touchscreen, press the button to transfer the degreasing tank to the washing tank. First, the normally open electric butterfly valve 15 will automatically close, and electric butterfly valves 16 and 26 will open. Electric butterfly valve 25 will remain normally open, and electric ball valves 19, 29, and 33 will remain normally closed. The circulating stirring water pump 11 will automatically start, and the degreasing liquid will flow into the washing tank through the manual butterfly valves 12, 13, 16, 26, 25, and 24. The remaining tank liquid accounts for about 10% of the total. That is, when the liquid level in the pre-degreasing tank drops to the set level (e.g., 50mm above the pump suction pipe), the circulating stirring water pump 11 and electric butterfly valve 16 are automatically shut off, and electric ball valves 19, 33, 35, and 15 are opened. The pneumatic diaphragm pump 31 transfers the remaining tank liquid to the washing tank until the liquid level is zero. Then, electric ball valves 19, 33, 35, and 26 are closed to complete the transfer of the degreasing tank liquid.

[0032] After the degreasing tank is cleaned, start the degreasing tank liquid rotation program in the water washing tank. The program will automatically execute the corresponding process, complete the start and stop of the corresponding water pumps, and the opening and closing of the valves, transferring the degreasing liquid in the water washing tank into the degreasing tank.

[0033] Example 3 Taking the replacement of the pre-degreasing tank solution as an example: When the degreasing solution in the pre-degreasing tank needs to be replaced after a certain period of use, it can be transferred to the pre-degreasing tank for continued use. First, the solution in the pre-degreasing tank needs to be emptied using manual butterfly valve 8, and then the solution is transferred to the pre-degreasing tank. The process is as follows: Pressure level gauge 20 detects that the liquid level in the pre-degreasing tank is zero, indicating that the solution is ready for transfer. The button to transfer the solution from the degreasing tank to the pre-degreasing tank is activated on the control system touchscreen. First, electric ball valve 15 is automatically closed, electric butterfly valves 16 and 6 are opened, normally open electric butterfly valve 5 remains open, and electric ball valves 9, 29, and 33 remain closed. The circulating stirring water pump 11 is automatically started, and the degreasing solution flows into the pre-degreasing tank through manual butterfly valves 12, 13, 16, 6, 5, and 4. The remaining tank liquid accounts for about 10% of the total. That is, when the liquid level in the pre-degreasing tank drops to the set level (e.g., 50mm above the pump suction pipe), the circulating stirring water pump 11 and the electric butterfly valve 16 are automatically shut off, and the electric ball valves 9, 33, 35, and 15 are opened. The pneumatic diaphragm pump 31 transfers the remaining tank liquid to the pre-degreasing tank until the liquid level is zero. Then, the electric ball valves 9, 33, 35, and 16 are closed to complete the transfer of the degreasing tank liquid.

[0034] Although embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the scope of the invention is not limited to the contents disclosed in the embodiments.

Claims

1. A pre-treatment tank automatic transfer system for painting, characterized by: The system includes a pre-degreasing tank system, a degreasing tank system, a washing tank system, a first pipeline system, and a second pipeline system; The pre-degreasing tank system, degreasing tank system, and washing tank system each include a first output end, a second output end, and an input end. The first output end and input end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system are tightly connected to the first pipeline system through pipes. The second output end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system is tightly connected to the second pipeline system through pipes. The second pipeline system is tightly connected to the first pipeline system. The second output end of each of the pre-degreasing tank system, degreasing tank system, and washing tank system is also tightly connected to the second pipeline system through pipes. The pre-degreasing tank system, degreasing tank system, and washing tank system can all perform pre-degreasing, degreasing, and agitation cleaning operations on workpieces immersed in the tank.

2. The system of claim 1, wherein: The first pipeline system includes a first electric butterfly valve for a pre-degreasing tank, a first electric butterfly valve for a degreasing tank, and a first electric butterfly valve for a washing tank. The first electric butterfly valve for the pre-degreasing tank is tightly connected to the first output end and the first input end of the pre-degreasing tank system. The first electric butterfly valve for the degreasing tank is tightly connected to the first output end and the first input end of the degreasing tank system. The first electric butterfly valve for the washing tank is tightly connected to the first output end and the first input end of the washing tank system. The first electric butterfly valves for the pre-degreasing tank, the degreasing tank, and the washing tank are connected in parallel through pipelines.

3. The system of claim 1, wherein: The pre-degreasing tank system includes a pre-degreasing circulating stirring water pump, a first manual butterfly valve, a second manual butterfly valve, a third manual butterfly valve, a normally open electric butterfly valve, a pressure gauge, a fourth manual butterfly valve, an electric ball valve, and a pre-degreasing tank. The pre-degreasing tank is arranged vertically. The lower part of the pre-degreasing tank is tightly connected to the first manual butterfly valve. The first manual butterfly valve, the pre-degreasing circulating stirring water pump, and the second manual butterfly valve are sequentially and tightly connected, forming the first output end of the pre-degreasing tank system. The third manual butterfly valve is tightly connected to the upper middle part of the pre-degreasing tank. The third manual butterfly valve of the grease tank is tightly connected to the normally open electric butterfly valve of the pre-degreasing tank and forms the input end of the pre-degreasing tank system. The second manual butterfly valve and the normally open electric butterfly valve of the pre-degreasing tank are both tightly connected to the first electric butterfly valve of the pre-degreasing tank through pipelines. The pressure gauge of the pre-degreasing tank is installed on the pipeline between the second manual butterfly valve and the first electric butterfly valve of the pre-degreasing tank and can detect the pressure in the pipeline. The fourth manual butterfly valve and the electric ball valve of the pre-degreasing tank are connected in parallel and tightly connected to the bottom of the pre-degreasing tank. The electric ball valve of the pre-degreasing tank forms the second output end of the pre-degreasing tank system. The fourth manual butterfly valve of the pre-degreasing tank can discharge the liquid at the bottom of the pre-degreasing tank. The degreasing tank system includes a degreasing tank circulating stirring water pump, a first manual butterfly valve, a second manual butterfly valve, a third manual butterfly valve, a normally open electric butterfly valve, a pressure gauge, a fourth manual butterfly valve, an electric ball valve, and a degreasing tank. The degreasing tank is arranged vertically. The lower part of the degreasing tank is tightly connected to the first manual butterfly valve. The first manual butterfly valve, the degreasing tank circulating stirring water pump, and the second manual butterfly valve are sequentially and tightly connected to form the first output end of the degreasing tank system. The third manual butterfly valve is tightly connected to the upper middle part of the degreasing tank. The third manual butterfly valve is tightly connected to the normally open electric butterfly valve of the degreasing tank and forms the input end of the degreasing tank system. The second manual butterfly valve and the normally open electric butterfly valve of the degreasing tank are both tightly connected to the first electric butterfly valve of the degreasing tank through pipelines. The pressure gauge of the degreasing tank is installed on the pipeline between the second manual butterfly valve and the first electric butterfly valve of the degreasing tank and can detect the pressure in the pipeline. The fourth manual butterfly valve and the electric ball valve of the degreasing tank are connected in parallel and are both tightly connected to the bottom of the degreasing tank. The electric ball valve of the degreasing tank forms the second output end of the degreasing tank system. The fourth manual butterfly valve of the degreasing tank can discharge the liquid at the bottom of the degreasing tank. The washing tank system includes a washing tank circulating agitator pump, a first manual butterfly valve, a second manual butterfly valve, a third manual butterfly valve, a normally open electric butterfly valve, a pressure gauge, a fourth manual butterfly valve, an electric ball valve, and a washing tank. The washing tank is vertically oriented. The lower part of the washing tank is tightly connected to the first manual butterfly valve. The first manual butterfly valve, the washing tank circulating agitator pump, and the second manual butterfly valve are sequentially and tightly connected to form the first output end of the washing tank system. The third manual butterfly valve is tightly connected to the upper middle part of the washing tank. The third manual butterfly valve is tightly connected to the normally open electric butterfly valve of the washing tank and forms the input end of the washing tank system. The second manual butterfly valve and the normally open electric butterfly valve of the washing tank are both tightly connected to the first electric butterfly valve of the washing tank through pipelines. The pressure gauge of the washing tank is installed on the pipeline between the second manual butterfly valve and the first electric butterfly valve of the washing tank and can detect the pressure in the pipeline. The fourth manual butterfly valve and the electric ball valve of the washing tank are connected in parallel and are both tightly connected to the bottom of the washing tank. The electric ball valve of the washing tank forms the second output end of the washing tank system. The fourth manual butterfly valve of the washing tank can discharge the liquid at the bottom of the washing tank.

4. The system of claim 1, wherein: The second pipeline system includes a pneumatic diaphragm pump, a second pipeline ball valve, a second pipeline electric ball valve, a second pipeline pressure gauge, and a solenoid valve. The electric ball valves for the pre-degreasing tank, degreasing tank, and washing tank are connected in parallel and tightly connected to the second pipeline ball valve via pipelines. The input end of the pneumatic diaphragm pump is tightly connected to the second pipeline ball valve, and the second pipeline electric ball valve is tightly connected to the output end of the pneumatic diaphragm pump. The second pipeline electric ball valve is also tightly connected to the first pipeline. The solenoid valve is tightly connected to the air inlet end of the pneumatic diaphragm pump. The pneumatic diaphragm pump transfers the tank liquid back to the first pipeline. The solenoid valve controls the flow of compressed air to start or stop the diaphragm pump. The second pipeline pressure gauge is installed on the output end of the pneumatic diaphragm pump and monitors the output pressure of the pneumatic diaphragm pump.

5. The system of claim 4, wherein: The pneumatic diaphragm pump is a small-flow pump.

6. The system of claim 1, wherein: The system also includes a control system, which is electrically connected to the first and second pipeline systems. The control system can control the opening and closing of the first and second pipeline systems and facilitate rapid transfer of the tank liquid. The control system includes a touchscreen, a controller, a pressure level gauge for the pre-degreasing tank, a pressure level gauge for the degreasing tank, and a pressure level gauge for the washing tank. The pressure level gauge for the pre-degreasing tank is tightly connected to the pre-degreasing tank and can detect the liquid level in the pre-degreasing tank in real time. The pressure level gauge for the degreasing tank is also tightly connected to the degreasing tank and can detect the liquid level in the degreasing tank in real time. Liquid level; The pressure level gauge for the washing tank is tightly connected to the washing tank, and can detect the liquid level in the washing tank in real time; The pressure level gauges for the pre-degreasing tank, degreasing tank, and washing tank are also connected to the controller, which transmits the liquid level data in the system. The controller can control all electric valves and water pumps in the pre-degreasing tank system, degreasing tank, washing tank system, first pipeline system, and second pipeline system through electrical signals. The touch screen is connected to the controller, and can display the controller's control status and operating data. It can also be used to modify and control the start and stop of the system.

7. The system of any one of claims 1 to 6, wherein: In the system, the pipe diameter connected to the ball valve is less than or equal to DN32, the pipe diameter connected to the butterfly valve is greater than DN32, and the pre-degreasing circulating stirring water pump, the degreasing tank circulating stirring water pump, and the washing tank circulating stirring water pump are all centrifugal pumps.

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