An electrophoretic paint transfer system and method

Abstract

This invention belongs to the field of electrophoresis technology and relates to an electrophoretic paint transfer system, including an electrophoresis main circulation unit. The main circulation unit includes an electrophoresis tank, an electrophoresis circulation pump B1, a bag filter, and a temperature control system. It also includes an electrophoretic paint transfer unit, which includes a pure water washing tank and a pure water washing pump. The pipeline between the electrophoresis circulation pump B1 and the bag filter is connected to the inlet of the pure water washing tank via an outlet branch. The outlet of the pure water washing tank is connected to the inlet branch via the pure water washing pump, which is connected to the pipeline between the electrophoresis circulation pump B1 and the bag filter. This invention also relates to an electrophoretic paint transfer method, which achieves the transfer of electrophoretic paint by controlling the opening and closing of corresponding valves. This invention eliminates the need for an electrophoresis storage tank, greatly saving costs and conserving workshop space. The operation is simple and reliable.

Description

Technical Field

[0001] This invention belongs to the field of electrophoresis technology and relates to an electrophoretic paint transfer system and method. Background Technology

[0002] To ensure the proper functioning of the electrophoresis process, the electrophoresis tank needs to be cleaned and maintained regularly. Cleaning and maintaining the electrophoresis tank requires transferring the electrophoretic paint inside.

[0003] Existing transfer methods are cumbersome and costly, requiring a dedicated electrophoresis reservoir system to store the electrophoretic paint. The reservoir must hold all the paint with sufficient margin. To prevent deformation when full, it is typically constructed from 6-10mm thick low-carbon steel plates, with internal anti-corrosion treatment and a corresponding piping system for emptying.

[0004] Existing methods require specialized electrophoresis storage tanks, in-tank circulation and stirring systems, and supporting external pipelines, which occupy a large area and have high costs for the storage tanks alone. Moreover, the storage tanks are mostly idle and require frequent maintenance, wasting manpower, financial resources, and workshop space. Summary of the Invention

[0005] The purpose of this invention is to provide an electrophoretic paint transfer system with a scientifically and rationally designed structure, which reduces workshop space requirements, saves costs, and is easy to implement; as well as an electrophoretic paint transfer method that is convenient to operate and saves manpower.

[0006] The technical problem solved by this invention is achieved through the following technical solution:

[0007] An electrophoretic paint transfer system includes an electrophoretic main circulation unit, which comprises an electrophoresis tank, an electrophoretic circulation pump B1, a bag filter, and a constant temperature system. The bag filter is connected to the outlet of the electrophoresis tank via the electrophoretic circulation pump B1. The outlet of the bag filter is connected to the constant temperature system, and the outlet of the constant temperature system is connected to the inlet of the electrophoresis tank. The system is characterized by further including an electrophoretic paint transfer unit, which comprises a pure water washing tank and a pure water washing pump. The inlet of the pure water washing tank is connected to the pipeline between the electrophoretic circulation pump B1 and the bag filter via an outlet branch. Valves A1 and A2 are respectively installed at both ends of the outlet branch. A pressure gauge P1 is installed on the outlet pipeline. The outlet of the pure water washing tank is connected to the inlet branch via the pure water washing pump. This inlet branch is connected to the pipeline between the electrophoretic circulation pump B1 and the bag filter.

[0008] Furthermore, valve X1 is installed on the pipeline in front of the electrophoresis circulation pump B1, valve X2 is installed on the pipeline behind the electrophoresis circulation pump B1, pressure gauge P2 and valve X5 are installed sequentially on the pipeline at the inlet of the bag filter, valve X4, pressure gauge P3 and valve X7 are installed sequentially from front to back on the pipeline at the outlet of the bag filter, valve X3 is connected in parallel on the pipeline before and after the bag filter, valve X8 and valve X9 are installed sequentially from back to front on the pipeline at the outlet of the constant temperature system, and valve X6 is connected in parallel on the pipeline before and after the constant temperature system, located in front of valves X7 and X8.

[0009] Valve C1 is installed on the front pipeline of the pure water washing pump, and valves C2, pressure gauge P4, valve C3 and valve C4 are installed sequentially from back to front on the rear pipeline of the pure water washing pump.

[0010] Furthermore, it also includes an electrophoresis residual liquid transfer unit, which includes a residual liquid transfer pump B3. The electrophoresis tank is connected to the outlet branch through a residual liquid outlet pipe, and the pure water washing tank is connected to the first three-way valve through a residual liquid inlet pipe. One branch of the first three-way valve is connected to the residual liquid outlet branch of the electrophoresis tank, and the other branch of the first three-way valve is connected to the second three-way valve through the residual liquid transfer pump B3. One branch of the second three-way valve is connected to the inlet of the electrophoresis tank, and the other branch of the second three-way valve is connected to the outlet branch.

[0011] Furthermore, a valve E5 is installed on the residual liquid outlet pipeline, which is connected to the front end of valve A2 on the outlet branch. A valve E2 is installed on the residual liquid inlet pipeline, and a valve D1 is installed on the residual liquid outlet branch. A valve D2 is installed between the residual liquid transfer pump B3 and the second three-way valve. A pressure gauge P5, a valve E3, and a valve E4 are installed sequentially from back to front on the pipeline between the second three-way valve and the electrophoresis tank. A valve D3 and a pressure gauge P6 are installed sequentially from front to back on the pipeline between the second three-way valve and the pure water washing tank.

[0012] A method for transferring electrophoretic paint, characterized by comprising the following steps:

[0013] Step 1: Before pouring the electrophoretic paint, first drain all the pure water in the pure water washing tank, clean the pure water washing tank to keep it clean, close valves X3, X4 and X5, open valves A1, A2 and X2, and turn on the electrophoretic circulation pump B1. A large amount of electrophoretic paint in the electrophoretic tank can then be transferred to the pure water washing tank.

[0014] Step 2: After a large amount of electrophoretic paint is transferred to the pure water washing tank, stop the electrophoretic circulation pump B1, close valves A1 and X2, open valves D1, D2, and D3, and start the residual liquid transfer pump B3 to pump the remaining electrophoretic paint in the electrophoretic tank into the pure water washing tank.

[0015] Step 3: After all the electrophoretic paint has been transferred to the pure water washing tank, normal cleaning and maintenance work on the electrophoretic tank begins.

[0016] Step 4: After cleaning and maintaining the electrophoresis tank, clean the electrophoresis tank thoroughly and transfer the electrophoretic paint temporarily stored in the pure water washing tank back into the electrophoresis tank.

[0017] Furthermore, the method for transferring the electrophoretic paint temporarily stored in the pure water washing tank back into the electrophoresis tank is as follows:

[0018] Step 4.1: Close valves X2, A1 and A2, open valves C1, C2, C3, C4 and X9, and turn on the pure water washing pump B2. The large amount of paint in the pure water washing tank can then be transferred to the electrophoresis tank.

[0019] Step 4.2: After a large amount of electrophoretic paint solution has been transferred to the electrophoresis tank, stop the pure water washing pump B2, close valves C1, C3, C4, X9, and D1, open valves E1, E2, D2, and E4, and start the residual liquid transfer pump B3 to pump the remaining electrophoretic paint in the pure water washing tank into the electrophoresis tank. At this point, the transfer of electrophoretic paint from the pure water washing tank to the electrophoresis tank is complete.

[0020] Furthermore, it also includes step 5, cleaning the pure water pipeline, the steps of which are as follows:

[0021] Step 5.1: First, fill the pure water washing tank with cleaning solvent, open valves C1, C2, C3, C4, A1, and A2, close valves X2, X3, and X5, and turn on the pure water washing pump B2 to clean the pure water pipeline with solvent.

[0022] Step 5.2: After the pure water pipeline is cleaned, stop the pure water washing pump B2, open valves E1, E2, D2, D3, E3, E5, and A2, close valves D1, A1, and E4, and start the residual liquid pump B3 to transfer the residual solvent cleaning liquid to the pipeline.

[0023] Step 5.3: After cleaning, refill with pure water and clean again. Repeat the above steps until the water is clean, then add fresh pure water.

[0024] The advantages and beneficial effects of this invention are as follows:

[0025] This electrophoretic paint transfer system and method utilizes the pure water washing tank required for normal production on the production line as the electrophoretic paint storage tank. The volume of the pure water washing tank is appropriately expanded to match the effective volume of the electrophoretic paint tank, with sufficient margin. Simultaneously, the internal circulation stirring pipeline already present in the pure water washing tank ensures proper stirring of the electrophoretic paint solution, requiring no additional configuration. Only pipelines are needed to introduce the pure water from the electrophoretic paint tank into the pure water washing tank and to return the pure water from the washing tank to the electrophoretic paint tank. These pipelines can be facilitated by the pure water washing pump in the washing tank and the pipeline used to rinse away any residual electrophoretic paint during the pouring process. This method eliminates the need for an electrophoretic paint storage tank, significantly saving costs and conserving workshop space. The operation is simple and reliable. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a transfer system using an electrophoresis reservoir in the prior art of this invention;

[0027] Figure 2 This is a schematic diagram of the transfer system of the present invention;

[0028] Figure 3 This is a schematic diagram of the system for transferring electrophoretic paint from the electrophoresis tank to the pure water washing tank according to the present invention;

[0029] Figure 4 This is a schematic diagram of the system for transferring the remaining electrophoretic paint in the electrophoresis tank to the pure water washing tank in this invention;

[0030] Figure 5 This is a schematic diagram of the system for transferring electrophoretic paint from the pure water washing tank back to the electrophoresis tank according to the present invention;

[0031] Figure 6 This is a schematic diagram of the system for transferring the remaining electrophoretic paint in the pure water tank back to the electrophoresis tank according to the present invention;

[0032] Figure 7 This is a schematic diagram of the system for cleaning a pure water washing tank according to the present invention. Detailed Implementation

[0033] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0034] An electrophoretic paint transfer system includes an electrophoretic main circulation unit, which is used to stir the electrophoretic paint liquid to ensure that the composition of the electrophoretic paint liquid is uniform during the electrophoresis process, prevent the paint liquid from precipitating, and at the same time ensure that the temperature of the paint liquid is uniform, so that the coating has a good appearance.

[0035] The electrophoresis main circulation unit includes an electrophoresis tank, an electrophoresis circulation pump B1, a bag filter, and a constant temperature system. The bag filter is connected to the outlet of the electrophoresis tank via the electrophoresis circulation pump B1. The outlet of the bag filter is connected to the constant temperature system, and the outlet of the constant temperature system is connected to the inlet of the electrophoresis tank. A valve X1 is installed on the pipeline in front of the electrophoresis circulation pump B1, and a valve X2 is installed on the pipeline behind the electrophoresis circulation pump B1. A pressure gauge P2 and a valve X5 are sequentially installed on the pipeline in front of the bag filter in front of it. A valve X4, a pressure gauge P3, and a valve X7 are sequentially installed from front to back on the pipeline in front of the bag filter in front of it. A valve X3 is connected in parallel on the pipelines before and after the bag filter. A valve X8 and a valve X9 are sequentially installed from back to front on the pipeline in front of the outlet of the constant temperature system in front of it. A valve X6 located in front of valves X7 and X8 is connected in parallel on the pipelines before and after the constant temperature system.

[0036] During operation, the main electrophoresis circulation unit uses electrophoresis circulation pump B1 to draw the paint solution from the electrophoresis tank, which then passes through a bag filter and a constant temperature system before returning to the electrophoresis tank in a cyclical manner. This process is further aided by a dedicated stirring system within the tank to achieve the purpose of paint solution circulation and stirring. Figure 1 As shown.

[0037] Its innovation lies in: such as Figure 2 As shown, it also includes an electrophoretic paint transfer unit, which includes a pure water washing tank and a pure water washing pump. The pipeline between the electrophoretic circulation pump B1 and the bag filter is connected to the inlet of the pure water washing tank through an outlet branch. Valves A1 and A2 are respectively provided at both ends of the outlet branch. A pressure gauge P1 is provided on the outlet pipeline. The outlet of the pure water washing tank is connected to the inlet branch through the pure water washing pump. The inlet branch is connected to the pipeline between the electrophoretic circulation pump B1 and the bag filter.

[0038] Valve C1 is installed on the front pipeline of the pure water washing pump, and valves C2, pressure gauge P4, valve C3 and valve C4 are installed sequentially from back to front on the rear pipeline of the pure water washing pump.

[0039] Valve F1 is the drain valve for the pure water washing tank. This valve is opened when the pure water is drained before the electrophoresis solution is introduced into the pure water washing tank. After the pure water in the pure water washing tank is drained, the valve is closed, and then the liquid can be poured out.

[0040] To ensure thorough electrophoretic paint transfer and avoid waste due to paint residue, a residual electrophoretic liquid transfer unit is provided. This unit includes a residual liquid transfer pump B3. The electrophoresis tank is connected to the outlet branch via a residual liquid outlet pipe. The pure water washing tank is connected to a first three-way valve via a residual liquid inlet pipe. One branch of the first three-way valve connects to the residual liquid outlet branch of the electrophoresis tank, and the other branch connects to a second three-way valve via the residual liquid transfer pump B3. One branch of the second three-way valve connects to the inlet of the electrophoresis tank, and the other branch connects to the outlet branch. A compressed air pipe is connected to the residual liquid transfer pump B3.

[0041] A valve E5 is installed on the residual liquid outlet pipeline, which is connected to the front end of valve A2 on the outlet branch. A valve E2 is installed on the residual liquid inlet pipeline, and a valve D1 is installed on the residual liquid outlet branch. A valve D2 is installed between the residual liquid transfer pump B3 and the second three-way valve. A pressure gauge P5, a valve E3, and a valve E4 are installed sequentially from back to front on the pipeline between the second three-way valve and the electrophoresis tank. A valve D3 and a pressure gauge P6 are installed sequentially from front to back on the pipeline between the second three-way valve and the pure water washing tank.

[0042] A method for transferring electrophoretic paint, the specific operation of which is as follows:

[0043] Before pouring the electrophoretic paint, first drain all the paint from the pure water rinsing tank, ensuring the inside of the rinsing tank is clean. Close valves X3-X5, open valves A1, A2, and X2, and turn on the electrophoretic circulation pump B1. The large amount of paint in the electrophoretic tank can then enter the pure water rinsing tank. For example... Figure 3 As shown.

[0044] After a large amount of electrophoretic paint solution is poured into the pure water washing tank, the electrophoretic circulation pump B1 is stopped, valves A1 and X2 are closed, valves D1, D2, and D3 are opened, and the residual liquid transfer pump B3 is started to pump the remaining electrophoretic paint in the electrophoretic tank into the pure water washing tank. Figure 4 As shown. Then, normal cleaning and maintenance work can be carried out on the electrophoresis tank.

[0045] After the maintenance of the electrophoresis tank is completed, clean the tank thoroughly in preparation for refilling the electrophoretic paint. The electrophoretic paint temporarily stored in the pure water rinsing tank needs to be pumped back into the electrophoresis tank. The specific procedure is to close valves X2, A1, and A2, open valves C1, C2, C3, C4, and X9, and turn on the pure water rinsing pump B2. The large amount of paint in the pure water rinsing tank can then enter the electrophoresis tank. Figure 5 As shown.

[0046] After a large amount of electrophoretic paint solution is poured into the electrophoresis tank, stop the pure water washing pump B2, close valves C1, C3, C4, X9, and D1, open valves E1, E2, D2, and E4, and start the residual liquid transfer pump B3 to pump the remaining electrophoretic paint in the pure water washing tank into the electrophoresis tank. Figure 6 As shown. This completes the process of transferring the pure water from the washing tank to the electrophoresis tank.

[0047] The remaining electrophoretic paint in the pure water pipeline needs to be cleaned thoroughly, otherwise it will affect the normal operation of the pure water washing tank. Therefore, a further cleaning step is required.

[0048] The specific operation is as follows: First, fill the pure water washing tank with cleaning solvent. Open valves C1, C2, C3, C4, A1, and A2; close valves X2, X3, and X5; and turn on pure water washing pump B2. This will clean the main drain line with solvent until it is clean. Then, stop pure water washing pump B2. Next, open valves E1, E2, D2, D3, E3, E5, and A2; close valves D1, A1, and E4; and turn on residual liquid pump B3. This will transfer the residual solvent from the cleaning process to the drain line. After cleaning, refill the tank with pure water and clean again. Repeat the above steps until the tank is clean. Finally, add fresh pure water. Figure 7 As shown. The entire set of equipment can function normally.

[0049] Compared with existing technologies, this invention significantly reduces the transfer cost of electrophoretic paint. Existing technologies require a separate electrophoretic paint storage tank, resulting in high investment costs. Furthermore, the storage tank is only used during paint transfer, leading to prolonged periods of idle time and wasted workshop space. This invention rationally utilizes existing pure water washing tanks for paint transfer. When the pure water washing tank is needed for paint transfer, the pure water is drained; when the washing function is needed, pure water is refilled. The price of pure water is extremely low compared to manufacturing a separate transfer pipeline system; therefore, this invention can significantly reduce the transfer cost of electrophoretic paint.

[0050] In one project, the electrophoresis tank had a volume of 130 tons and occupied an area of ​​60 square meters. 2 The required volume of its storage tank is approximately 143 tons, and it needs to occupy an area of ​​70 square meters. 2 The cost is approximately 250,000 yuan; by adopting this method, pure water can be used directly in the washing tank, saving 70 square meters of floor space. 2 Material costs were reduced by 250,000.

[0051] Although embodiments and drawings of the present 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 present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. An electrophoretic paint transfer system, comprising an electrophoretic main circulation unit, wherein the electrophoretic main circulation unit includes an electrophoresis tank, an electrophoretic circulation pump B1, a bag filter, and a temperature control system, wherein the bag filter is connected to the outlet of the electrophoresis tank via the electrophoretic circulation pump B1, the outlet of the bag filter is connected to the temperature control system, and the outlet of the temperature control system is connected to the inlet of the electrophoresis tank, characterized in that: It also includes an electrophoretic paint transfer unit, which includes a pure water washing tank and a pure water washing pump. The pipeline between the electrophoretic circulation pump B1 and the bag filter is connected to the inlet of the pure water washing tank through an outlet branch. Valves A1 and A2 are respectively installed at both ends of the outlet branch. A pressure gauge P1 is installed on the outlet pipeline. The outlet of the pure water washing tank is connected to the inlet branch through the pure water washing pump. The inlet branch is connected to the pipeline between the electrophoretic circulation pump B1 and the bag filter. A valve X1 is installed on the pipeline in front of the electrophoresis circulation pump B1, a valve X2 is installed on the pipeline behind the electrophoresis circulation pump B1, a pressure gauge P2 and a valve X5 are installed sequentially on the pipeline at the inlet of the bag filter, a valve X4, a pressure gauge P3 and a valve X7 are installed sequentially from front to back on the pipeline at the outlet of the bag filter, a valve X3 is connected in parallel on the pipelines before and after the bag filter, a valve X8 and a valve X9 are installed sequentially from back to front on the pipeline at the outlet of the constant temperature system, and a valve X6 located in front of valves X7 and X8 is connected in parallel on the pipelines before and after the constant temperature system. Valve C1 is installed on the front pipeline of the pure water washing pump, and valve C2, pressure gauge P4, valve C3 and valve C4 are installed sequentially from back to front on the rear pipeline of the pure water washing pump. It also includes an electrophoresis residual liquid transfer unit, which includes a residual liquid transfer pump B3. The electrophoresis tank is connected to the outlet branch through a residual liquid outlet pipe. The pure water washing tank is connected to the first three-way valve through a residual liquid inlet pipe. One branch of the first three-way valve is connected to the residual liquid outlet branch of the electrophoresis tank. The other branch of the first three-way valve is connected to the second three-way valve through the residual liquid transfer pump B3. One branch of the second three-way valve is connected to the inlet of the electrophoresis tank. The other branch of the second three-way valve is connected to the outlet branch. A valve E5 is installed on the residual liquid outlet pipeline, which is connected to the front end of valve A2 on the outlet branch. A valve E2 is installed on the residual liquid inlet pipeline, and a valve D1 is installed on the residual liquid outlet branch. A valve D2 is installed between the residual liquid transfer pump B3 and the second three-way valve. A pressure gauge P5, a valve E3, and a valve E4 are installed sequentially from back to front on the pipeline between the second three-way valve and the electrophoresis tank. A valve D3 and a pressure gauge P6 are installed sequentially from front to back on the pipeline between the second three-way valve and the pure water washing tank.

2. A method for transferring electrophoretic paint, characterized in that: This transfer method is implemented based on the electrophoretic paint transfer system described in claim 1, and includes the following steps: Step 1: Before pouring the electrophoretic paint, first drain all the pure water in the pure water washing tank, clean the pure water washing tank to keep it clean, close valves X3, X4 and X5, open valves A1, A2 and X2, and turn on the electrophoretic circulation pump B1. A large amount of electrophoretic paint in the electrophoretic tank can then be transferred to the pure water washing tank. Step 2: After a large amount of electrophoretic paint is transferred to the pure water washing tank, stop the electrophoretic circulation pump B1, close valves A1 and X2, open valves D1, D2, and D3, and start the residual liquid transfer pump B3 to pump the remaining electrophoretic paint in the electrophoretic tank into the pure water washing tank. Step 3: After all the electrophoretic paint has been transferred to the pure water washing tank, normal cleaning and maintenance work on the electrophoretic tank begins. Step 4: After the cleaning and maintenance of the electrophoresis tank is completed, clean the electrophoresis tank thoroughly and transfer the electrophoretic paint temporarily stored in the pure water washing tank back into the electrophoresis tank. The method for transferring the temporarily stored electrophoretic paint in the pure water washing tank back into the electrophoresis tank is as follows: Step 4.1: Close valves X2, A1 and A2, open valves C1, C2, C3, C4 and X9, and turn on the pure water washing pump B2. The large amount of paint in the pure water washing tank can then be transferred to the electrophoresis tank. Step 4.2: After a large amount of electrophoretic paint solution has been transferred to the electrophoresis tank, stop the pure water washing pump B2, close valves C1, C3, C4, X9, and D1, open valves E1, E2, D2, and E4, and start the residual liquid transfer pump B3 to pump the remaining electrophoretic paint in the pure water washing tank into the electrophoresis tank. At this point, the transfer of electrophoretic paint from the pure water washing tank to the electrophoresis tank is complete.

3. The electrophoretic paint transfer method according to claim 2, characterized in that: It also includes step 5, cleaning the pure water pipeline, the steps of which are as follows: Step 5.1: First, fill the pure water washing tank with cleaning solvent, open valves C1, C2, C3, C4, A1, and A2, close valves X2, X3, and X5, and turn on the pure water washing pump B2 to clean the pure water pipeline with solvent. Step 5.2: After the pure water pipeline is cleaned, stop the pure water washing pump B2, open valves E1, E2, D2, D3, E3, E5, and A2, close valves D1, A1, and E4, and start the residual liquid pump B3 to transfer the residual solvent cleaning liquid to the pipeline. Step 5.3: After cleaning, refill with pure water and clean again. Repeat steps 5.1-5.2 above until clean, then add fresh pure water.

Images