Automatic circulating filtering device for aluminum profile anodic oxidation bath solution

Abstract

The invention belongs to the technical field of filtering devices, and particularly relates to an aluminum profile anodic oxidation bath solution automatic circulation filtering device which comprises a base frame and a solution inlet assembly, the solution inlet assembly is arranged at the bottom end of the base frame, a filtering assembly is fixedly installed at the bottom of the base frame, and a heat exchange assembly is fixedly connected to the top of the base frame. And a liquid outlet pipeline is arranged at the top of the side wall of the heat exchange assembly. According to the invention, the liquid inlet assembly is connected with different ports, so that the electrolyte is conveyed into different passages, different treatment procedures of the electrolyte can be realized through one set of power system, and parts required by multiple procedures of the electrolyte are reduced; after the liquid outlet end of the liquid inlet assembly communicates with the filtering assembly, the electrolyte is conveyed into the filtering assembly, and filtering of the electrolyte is achieved; and during filtering, the temperature of the electrolyte is increased due to electrolysis, so that the electrolyte can be cooled to the corresponding temperature through heat exchange, and the functions of filtering and cooling the electrolyte are realized.

Description

Technical Field

[0001] This invention belongs to the field of filtration device technology, specifically relating to an automatic circulating filtration device for aluminum profile anodizing bath solution. Background Technology

[0002] Anodizing tanks for aluminum profiles are complex and specialized systems engineering projects. They are the core equipment for aluminum profile surface treatment (anodizing), anodizing the aluminum profiles to form a dense, uniform aluminum oxide film on their surface. This film primarily improves corrosion resistance, enhances wear resistance, and provides a good undercoat for electrophoresis or spraying. The filtration system, acting like the "kidneys" of the anodizing tank, removes suspended solids, mainly aluminum hydroxide colloidal precipitates, which are aluminum ions (Al₂O₃). 3 ⁺) Hydrolysis in the bath solution (Al) 3 The reaction ⁺ + 3H₂O → Al(OH)₃ + 3H⁺ produces extremely fine flocculent matter. This matter adheres to the surface of the profile, causing problems such as white spots, dark spots, uneven coloring, and mottled appearance of the oxide film. It can also remove other impurities, such as dust in the air, trace amounts of insoluble matter introduced from the pretreatment process, and wear particles from equipment. However, the commonly used oxidation tank filtration devices have a single function, usually only having a filtration function. However, the electrolyte not only needs to be filtered during use, but also needs to dissipate the heat generated by electrolysis to avoid excessively high electrolysis temperatures, and needs to circulate the solution for mixing. To perform the above treatments on the electrolyte, a centrifugal pump is required to keep the electrolyte flowing. Ordinary filtration devices cannot achieve the above functions. Therefore, this invention is applied for to achieve the above functions. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic circulating filtration device for anodizing bath solutions of aluminum profiles. It can realize different treatment processes of electrolyte through a single power system, reducing the number of parts required for multiple electrolyte processes, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic circulating filtration device for anodizing bath liquid of aluminum profiles, comprising a base frame and a liquid inlet assembly, wherein the liquid inlet assembly is disposed at the bottom end of the base frame, a filtration assembly is fixedly installed at the bottom of the base frame, a heat exchange assembly is fixedly connected to the top of the base frame, and a liquid outlet pipe is provided at the top of the side wall of the heat exchange assembly. One end of the liquid inlet assembly is provided with a second electromagnetic three-way valve, and one end of the second electromagnetic three-way valve is connected to the filter assembly to form a filtration passage for the electrolyte. The filter assembly is provided with two liquid outlets, and a third electromagnetic three-way valve and a fourth electromagnetic three-way valve are fixedly installed on the two liquid outlets respectively. One end of the third electromagnetic three-way valve is connected to the heat exchange assembly to form a heat exchange passage for the electrolyte. One end of the fourth electromagnetic three-way valve is provided with a pipe that guides the electrolyte to the anodizing tank; The other end of the second electromagnetic three-way valve is connected to the other end of the third electromagnetic three-way valve through an infusion tube.

[0005] Furthermore, the liquid inlet assembly includes two correspondingly arranged corrosion-resistant centrifugal pumps. The inlet end of the two corrosion-resistant centrifugal pumps is equipped with a solenoid valve, and the outlet end of the two corrosion-resistant centrifugal pumps is equipped with a check valve. One end of the two solenoid valves is connected through a first U-shaped tube. A bend is provided in the middle of the first U-shaped tube, and a Y-shaped filter is provided at one end of the bend. A straight tube is provided in the middle of the second U-shaped tube.

[0006] Furthermore, the filter assembly includes a housing, with sealing plates at both ends of the housing. One of the sealing plates has a liquid inlet pipe fixedly connected to the bottom of one side, which is connected to one end of a straight pipe via a second electromagnetic three-way valve. One of the sealing plates has symmetrically arranged liquid outlet pipes at the top of one side, with one end of each of the two liquid outlet pipes connected to one end of a third electromagnetic three-way valve and one end of a fourth electromagnetic three-way valve, respectively. The bottom ends of both sealing plates are fixedly connected to a support frame, which is fixedly connected to the bottom end of the base frame.

[0007] Furthermore, the interior of the shell is provided with a partition, which divides the interior of the shell into a filtrate chamber and a wastewater chamber distributed vertically, and the partition is provided with uniformly distributed carbon tube filter elements.

[0008] Furthermore, the carbon tube filter element includes a bottom cover fixedly connected to the partition plate, a carbon filter tube fixedly connected to the top of the bottom cover, a top cover fixedly connected to the top of the carbon filter tube, a first electromagnetic three-way valve provided at the bottom of the bottom cover, the first electromagnetic three-way valve being installed at the bottom of the partition plate, and an end pipe provided at one end of the first electromagnetic three-way valve.

[0009] Furthermore, a drain pipe is fixedly connected to the bottom end of the housing, and a connecting pipe is fixedly connected to one end of the first electromagnetic three-way valve, with one end of the connecting pipe fixedly connected to the top end of the drain pipe.

[0010] Furthermore, a second hydraulic sensor for measuring the internal hydraulic pressure of the carbon filter tube is provided on the side wall of the carbon filter tube, and a first hydraulic sensor for measuring the internal hydraulic pressure of the filtrate chamber is provided on the side wall of the housing.

[0011] Furthermore, the heat exchange assembly includes a housing, and a curved tube is disposed inside the housing. The two ends of the curved tube are respectively connected to one end of a third electromagnetic three-way valve and one end of a second electromagnetic three-way valve.

[0012] Furthermore, the two ends of the outer shell are respectively fixedly connected to a first exchange liquid pipe and a second exchange liquid pipe, and a three-way valve is provided at one end of each of the first and second exchange liquid pipes.

[0013] Furthermore, a controller is provided at the bottom of the base frame. The first hydraulic sensor and the second hydraulic sensor are both electrically connected to the controller. The first electromagnetic three-way valve, the second electromagnetic three-way valve, the third electromagnetic three-way valve, and the fourth electromagnetic three-way valve are all electrically connected to an external power supply through the controller.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention connects the liquid inlet assembly to different ports, thereby delivering the electrolyte to different channels. This allows for different processing steps of the electrolyte to be achieved through a single power system, reducing the number of components required for multiple electrolyte processing steps. After the liquid outlet of the liquid inlet assembly is connected to the filter assembly, the electrolyte is delivered to the interior of the filter assembly for filtration. During filtration, the electrolyte temperature rises due to electrolysis. The filtered electrolyte is then introduced into the heat exchange assembly through a third electromagnetic three-way valve, achieving heat exchange and cooling to the appropriate temperature, thus realizing the functions of filtration and cooling. During initial equipment startup, the end of the liquid inlet assembly is connected to the heat exchange assembly through a second electromagnetic three-way valve and a delivery pipe. The heat exchange assembly heats the electrolyte, allowing it to quickly reach the operating temperature, thus achieving rapid heating. The filter assembly can self-clean itself during use, eliminating the need for frequent filter replacements, saving consumables, and allowing for continuous operation without downtime maintenance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a three-dimensional structural diagram of the liquid inlet assembly of the present invention; Figure 4 This is a three-dimensional structural diagram of the filter assembly of the present invention; Figure 5 This is a schematic diagram of the internal structure of the filter assembly of the present invention; Figure 6 This is an exploded view of the carbon tube filter element of the present invention; Figure 7 This is a front sectional view of the heat exchange component of the present invention.

[0016] The attached diagram lists the components represented by each number as follows: 1. Base frame; 2. Inlet assembly; 21. Corrosion-resistant centrifugal pump; 22. First U-shaped tube; 23. Second U-shaped tube; 24. Solenoid valve; 25. Check valve; 26. Bend; 27. Y-shaped filter; 28. Straight pipe; 3. Filter assembly; 31. Housing; 32. Sealing plate; 33. Inlet pipe; 34. Outlet pipe; 35. First hydraulic sensor; 36. Support frame; 37. Partition plate; 38. Wastewater tank; 39. Carbon fiber filter element; 3901. Carbon fiber filter tube; 3902. Bottom 3903. Cover; 3904. First electromagnetic three-way valve; 3905. End pipe; 3906. Connecting pipe; 3907. Second hydraulic sensor; 3908. Top cover; 310. Filter chamber; 3101. Drain pipe; 4. Heat exchange assembly; 41. Outer shell; 42. Curved pipe; 43. First exchange liquid pipe; 44. Second exchange liquid pipe; 45. Three-way valve; 5. Infusion pipe; 6. Second electromagnetic three-way valve; 7. Third electromagnetic three-way valve; 8. Fourth electromagnetic three-way valve; 9. Controller; 10. Outlet pipe. Detailed Implementation

[0017] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0018] like Figure 1 and 2 As shown, an automatic circulating filtration device for anodizing bath solution of aluminum profiles includes a base frame 1 and an inlet assembly 2. The inlet assembly 2 is located at the bottom of the base frame 1. A filter assembly 3 is fixedly installed at the bottom of the base frame 1. A heat exchange assembly 4 is fixedly connected to the top of the base frame 1. An outlet pipe 10 is provided on the top of the side wall of the heat exchange assembly 4. A second electromagnetic three-way valve 6 is provided at one end of the inlet assembly 2. One end of the second electromagnetic three-way valve 6 is connected to the filter assembly 3 to form a filtration passage for the electrolyte. The filter assembly 3 is provided with two outlets. A third electromagnetic three-way valve 7 and a fourth electromagnetic three-way valve 8 are fixedly installed at the two outlets respectively. One end of the third electromagnetic three-way valve 7 is connected to the heat exchange assembly 4 to form a heat exchange passage for the electrolyte. One end of the fourth electromagnetic three-way valve 8 is provided with a pipe to guide the electrolyte to the anodizing bath. The other end of the second electromagnetic three-way valve 6 is connected to the other end of the third electromagnetic three-way valve 7 through a delivery pipe 5.

[0019] According to the above structure, in use, the present invention connects the liquid inlet assembly 2 to different ports to deliver the electrolyte to different channels, thereby performing different treatment processes on the electrolyte. When the liquid outlet of the liquid inlet assembly 2 is connected to the filter assembly 3, the electrolyte is delivered to the interior of the filter assembly 3 to achieve filtration of the electrolyte, filtering out the Al(OH)3 flocculent precipitate in the electrolyte. The filtered electrolyte is then fed into the anodizing tank, where a sensor is installed to detect the electrolyte temperature. If the temperature is within the normal electrolysis temperature range, the electrolyte is directly fed into the anodizing tank through the fourth electromagnetic three-way valve 8 to achieve electrolyte circulation. If the temperature rises due to electrolysis during filtration, the filtered electrolyte is introduced into the heat exchange assembly 4 through the third electromagnetic three-way valve 7 to achieve heat exchange and cooling of the electrolyte to the corresponding temperature. Then, it flows back to the anodizing tank through the outlet pipe 10, thus achieving the functions of electrolyte filtration and cooling. If the electrolyte has not been used and its temperature has not yet reached the working temperature when the equipment is initially started, the end of the inlet assembly 2 is directly introduced into the heat exchange assembly 4 through the second electromagnetic three-way valve 6 and the delivery pipe 5. The heat exchange assembly 4 heats the electrolyte, thereby quickly raising the electrolyte to the working temperature and achieving the function of rapid heating of the electrolyte.

[0020] like Figure 3 As shown, the liquid inlet assembly 2 includes two corresponding corrosion-resistant centrifugal pumps 21. The inlet end of the two corrosion-resistant centrifugal pumps 21 is equipped with a solenoid valve 24, and the outlet end of the two corrosion-resistant centrifugal pumps 21 is equipped with a check valve 25. One end of the two solenoid valves 24 is connected through a first U-shaped tube 22. A bend 26 is provided in the middle of the first U-shaped tube 22, and a Y-shaped filter 27 is provided at one end of the bend 26. A straight tube 28 is provided in the middle of the second U-shaped tube 23.

[0021] According to the above structure, during use, one end of the liquid inlet assembly 2 is connected to the anodizing tank through a pipe, and then the electrolyte inside the anodizing tank is drawn by the corrosion-resistant centrifugal pump 21. During use, the corrosion-resistant centrifugal pump 21 works alternately to avoid overloading the corrosion-resistant centrifugal pump 21. The use of the check valve 25 prevents the electrolyte from flowing into the other corrosion-resistant centrifugal pump 21 and prevents electrolyte backflow.

[0022] like Figure 4 and 5As shown, the filter assembly 3 includes a housing 31, with sealing plates 32 at both ends of the housing 31. One of the sealing plates 32 has an inlet pipe 33 fixedly connected to the bottom of one side. The inlet pipe 33 is connected to one end of a straight pipe 28 through a second electromagnetic three-way valve 6. One of the sealing plates 32 has outlet pipes 34 symmetrically arranged at the top of one side. One end of each outlet pipe 34 is connected to one end of a third electromagnetic three-way valve 7 and one end of a fourth electromagnetic three-way valve 8, respectively. The bottom ends of both sealing plates 32 are fixedly connected to support frames 36, which are fixedly connected to the bottom end of the base frame 1. The housing 31 has a partition 37 inside, which divides the interior of the housing 31 into a filtrate chamber 310 and a wastewater chamber 38 distributed vertically. Carbon tube filter elements 39 are evenly distributed on the partition 37.

[0023] According to the above structure, when the electrolyte is sent into the filter assembly 3 for filtration, the electrolyte first enters the interior of the wastewater tank 38 through the inlet pipe 33, and then enters the carbon tube filter element 39 for filtration. The filtered electrolyte enters the interior of the filtrate tank 310, and then flows back to the interior of the anodizing tank or heat exchange assembly 4 through the outlet pipe 34.

[0024] like Figure 5 and 6 As shown, the carbon tube filter element 39 includes a bottom cover 3902 fixedly connected to the partition 37. The top end of the bottom cover 3902 is fixedly connected to the carbon filter tube 3901. The top end of the carbon filter tube 3901 is fixedly connected to the top cover 3907. The bottom end of the bottom cover 3902 is provided with a first electromagnetic three-way valve 3903. The first electromagnetic three-way valve 3903 is installed at the bottom end of the partition 37. One end of the first electromagnetic three-way valve 3903 is provided with an end pipe 3904. The bottom end of the housing 31 is fixedly connected to a drain pipe 3101. One end of the first electromagnetic three-way valve 3903 is fixedly connected to a connecting pipe 3905. One end of the connecting pipe 3905 is fixedly connected to the top end of the drain pipe 3101.

[0025] According to the above structure, during filtration, the first electromagnetic three-way valve 3903 first connects the end pipe 3904 to the bottom cover 3902. The electrolyte in the sewage tank 38 enters the interior of the carbon filter tube 3901 through the end pipe 3904. The electrolyte flows through the carbon filter tube 3901 to the interior of the filtrate tank 310. Impurities are filtered out by the carbon filter tube 3901 and remain on the inner wall of the carbon filter tube 3901. After filtration for a certain period of time, the electrolyte is released through one of the first electromagnetic three-way valves. 3903 connects the corresponding carbon filter tube 3901 to the connecting pipe 3905. The electrolyte inside the filtrate chamber 310 flows back to the inside of the carbon filter tube 3901 through the carbon filter tube 3901, thereby backwashing the impurities on the inner wall of the carbon filter tube 3901 and realizing the self-cleaning of the carbon filter tube 3901. During use, the carbon filter tube 3901 is cleaned sequentially, thereby realizing the self-cleaning of the filter assembly 3 and eliminating the need for frequent replacement of the carbon filter tube 3901.

[0026] like Figure 4-6 As shown, a second hydraulic sensor 3906 for measuring the internal hydraulic pressure of the carbon filter tube 3901 is provided on the side wall of the carbon filter tube 3901, and a first hydraulic sensor 35 for measuring the internal hydraulic pressure of the filtrate chamber 310 is provided on the side wall of the housing 31. A controller 9 is provided at the bottom of the base frame 1. The first hydraulic sensor 35 and the second hydraulic sensor 3906 are both electrically connected to the controller 9. The first electromagnetic three-way valve 3903, the second electromagnetic three-way valve 6, the third electromagnetic three-way valve 7 and the fourth electromagnetic three-way valve 8 are all electrically connected to an external power supply through the controller 9.

[0027] According to the above structure, when impurities accumulate inside the carbon filter tube 3901 during use, the electrolyte inside the carbon filter tube 3901 has difficulty flowing out, which in turn causes the hydraulic pressure inside the carbon filter tube 3901 to rise. The second hydraulic sensor 3906 detects the hydraulic pressure inside the carbon filter tube 3901, and the first hydraulic sensor 35 detects the hydraulic pressure inside the filter chamber 310. When the pressure difference between the carbon filter tube 3901 and the filter chamber 310 reaches a set value, the controller 9 controls the corresponding first electromagnetic three-way valve 3903 to connect the corresponding carbon filter tube 3901 to the connecting pipe 3905, thereby achieving the self-cleaning effect.

[0028] like Figure 7 As shown, the heat exchange assembly 4 includes a housing 41, and a curved pipe 42 is provided inside the housing 41. The two ends of the curved pipe 42 are respectively connected to one end of the third electromagnetic three-way valve 7 and one end of the second electromagnetic three-way valve 6. The two ends of the housing 41 are respectively fixedly connected to the first exchange liquid pipe 43 and the second exchange liquid pipe 44. A three-way valve 45 is provided at one end of the first exchange liquid pipe 43 and the second exchange liquid pipe 44.

[0029] According to the above structure, when heat exchange of the electrolyte is required, the electrolyte is delivered to the inside of the curved tube 42 through the third electromagnetic three-way valve 7. During use, the external coolant system and water heating system are connected to the two three-way valves 45 respectively. When the electrolyte needs to be heated, hot water is introduced into the shell 41 to heat the electrolyte flowing inside the curved tube 42. When the electrolyte needs to be cooled, cooling water is introduced into the shell 41 to cool the electrolyte flowing inside the curved tube 42.

[0030] The working principle of this invention is as follows: During use, the electrolyte is delivered to different channels by connecting the inlet assembly 2 to different ports, thereby achieving different treatment processes. When the outlet end of the inlet assembly 2 is connected to the filter assembly 3, the electrolyte is delivered to the interior of the filter assembly 3 for filtration, removing Al(OH)3 flocculent precipitates. The filtered electrolyte is then fed into the anodizing tank, where a sensor detects the electrolyte temperature. If the temperature is within the normal electrolysis temperature range, the electrolyte is directly fed into the anodizing tank via the fourth electromagnetic three-way valve 8 for circulating filtration. If the temperature rises during filtration due to electrolysis, the filtered electrolyte is then passed through the third electromagnetic three-way valve 7. The electrolyte is introduced into the heat exchange assembly 4 to achieve heat exchange and cooling to the corresponding temperature. Then, it flows back to the anodizing tank through the outlet pipe 10, realizing the functions of electrolyte filtration and cooling. If the electrolyte has not been used and its temperature has not yet reached the working temperature during the initial start-up of the equipment, the end of the inlet assembly 2 is directly introduced into the heat exchange assembly 4 through the second electromagnetic three-way valve 6 and the delivery pipe 5. The heat exchange assembly 4 heats the electrolyte, thereby quickly raising the electrolyte to the working temperature and realizing the rapid heating function of the electrolyte. When heat exchange of the electrolyte is required, the electrolyte is delivered to the inside of the curved pipe 42 through the third electromagnetic three-way valve 7. During use, the external coolant system and water heating system are connected to the two three-way valves 45 respectively. When the electrolyte needs to be heated, hot water is introduced into the casing 41 to heat the electrolyte flowing inside the curved tube 42. When the electrolyte needs to be cooled, cooling water is introduced into the casing 41 to cool the electrolyte flowing inside the curved tube 42. During use, the corrosion-resistant centrifugal pump 21 is used alternately to avoid overloading. The check valve 25 is used to prevent the electrolyte from flowing into the other corrosion-resistant centrifugal pump 21 and to prevent backflow of the electrolyte. When the electrolyte is sent into the filter assembly 3 for filtration, the electrolyte first enters the sewage tank 38 through the inlet pipe 33, and then enters the carbon tube filter element 39 for filtration. The filtered electrolyte enters the filtrate tank 310. The electrolyte in the wastewater tank 38 is then returned to the anodizing tank or heat exchange assembly 4 through the outlet pipe 34. During filtration, the first electromagnetic three-way valve 3903 first connects the end pipe 3904 to the bottom cover 3902. The electrolyte in the wastewater tank 38 enters the interior of the carbon filter tube 3901 through the end pipe 3904. The electrolyte flows through the carbon filter tube 3901 to the interior of the filtrate tank 310. Impurities are filtered out by the carbon filter tube 3901 and remain on the inner wall of the carbon filter tube 3901. After filtration for a certain period of time, one of the first electromagnetic three-way valves 3903 connects the corresponding carbon filter tube 3901 to the connecting pipe 3905. The electrolyte inside the filtrate tank 310 flows back to the interior of the carbon filter tube 3901 through the carbon filter tube 3901.This process backwashes impurities from the inner wall of the carbon filter tube 3901, achieving self-cleaning. During use, the carbon filter tube 3901 is cleaned sequentially, thus achieving self-cleaning of the filter assembly 3. This eliminates the need for frequent replacement of the carbon filter tube 3901. When impurities accumulate inside the carbon filter tube 3901, the electrolyte flow becomes difficult, causing a rise in internal hydraulic pressure. A second hydraulic sensor 3906 detects the internal hydraulic pressure, and a first hydraulic sensor 35 detects the internal hydraulic pressure in the filter chamber 310. When the pressure difference between the carbon filter tube 3901 and the filter chamber 310 reaches a set value, the controller 9 activates the first solenoid three-way valve 3903, connecting the carbon filter tube 3901 to the connecting pipe 3905, thereby achieving self-cleaning.

[0031] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An automatic circulating filtration device for anodizing bath solution of aluminum profiles, comprising a base frame (1) and a liquid inlet assembly (2), characterized in that: The liquid inlet assembly (2) is located at the bottom of the base frame (1). A filter assembly (3) is fixedly installed at the bottom of the base frame (1). A heat exchange assembly (4) is fixedly connected to the top of the base frame (1). A liquid outlet pipe (10) is provided on the top of the side wall of the heat exchange assembly (4). One end of the liquid inlet assembly (2) is provided with a second electromagnetic three-way valve (6), and one end of the second electromagnetic three-way valve (6) is connected to the filter assembly (3) to form a filter passage for the electrolyte. The filter assembly (3) is provided with two liquid outlets. The two liquid outlets are respectively fixedly installed with a third electromagnetic three-way valve (7) and a fourth electromagnetic three-way valve (8). One end of the third electromagnetic three-way valve (7) is connected to the heat exchange assembly (4) to form a heat exchange passage for the electrolyte. One end of the fourth electromagnetic three-way valve (8) is provided with a pipe that guides the electrolyte to the anodizing tank; The other end of the second electromagnetic three-way valve (6) is connected to the other end of the third electromagnetic three-way valve (7) through the infusion tube (5).

2. The automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 1, characterized in that: The liquid inlet assembly (2) includes two corresponding corrosion-resistant centrifugal pumps (21). The inlet end of the two corrosion-resistant centrifugal pumps (21) is equipped with a solenoid valve (24), and the outlet end of the two corrosion-resistant centrifugal pumps (21) is equipped with a check valve (25). One end of the two solenoid valves (24) is connected through a first U-shaped pipe (22). A bend (26) is provided in the middle of the first U-shaped pipe (22). A Y-shaped filter (27) is provided at one end of the bend (26). A second U-shaped pipe (23) is provided between the two check valves (25). A straight pipe (28) is provided in the middle of the second U-shaped pipe (23).

3. The automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 2, characterized in that: The filter assembly (3) includes a housing (31), and both ends of the housing (31) are provided with sealing plates (32). One of the sealing plates (32) has a liquid inlet pipe (33) fixedly connected to the bottom of one side. The liquid inlet pipe (33) is connected to one end of a straight pipe (28) through a second electromagnetic three-way valve (6). One of the sealing plates (32) has a liquid outlet pipe (34) symmetrically arranged on the top of one side. One end of the two liquid outlet pipes (34) is connected to one end of a third electromagnetic three-way valve (7) and one end of a fourth electromagnetic three-way valve (8), respectively. The bottom ends of the two sealing plates (32) are fixedly connected with support frames (36), which are fixedly connected to the bottom end of the base frame (1).

4. The automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 3, characterized in that: The interior of the housing (31) is provided with a partition (37), which divides the interior of the housing (31) into a filtrate chamber (310) and a wastewater chamber (38) distributed vertically. The partition (37) is provided with uniformly distributed carbon tube filter elements (39).

5. The automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 4, characterized in that: The carbon tube filter element (39) includes a bottom cover (3902) fixedly connected to the partition (37), the top end of the bottom cover (3902) is fixedly connected to the carbon filter tube (3901), the top end of the carbon filter tube (3901) is fixedly connected to the top cover (3907), the bottom end of the bottom cover (3902) is provided with a first electromagnetic three-way valve (3903), the first electromagnetic three-way valve (3903) is installed at the bottom end of the partition (37), and one end of the first electromagnetic three-way valve (3903) is provided with an end pipe (3904).

6. The automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 5, characterized in that: The bottom end of the housing (31) is fixedly connected to a drain pipe (3101), and one end of the first electromagnetic three-way valve (3903) is fixedly connected to a connecting pipe (3905). One end of the connecting pipe (3905) is fixedly connected to the top end of the drain pipe (3101).

7. An automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 6, characterized in that: The side wall of the carbon filter tube (3901) is provided with a second hydraulic sensor (3906) for measuring the internal hydraulic pressure of the carbon filter tube (3901), and the side wall of the housing (31) is provided with a first hydraulic sensor (35) for measuring the internal hydraulic pressure of the filtrate chamber (310).

8. The automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 7, characterized in that: The heat exchange assembly (4) includes a housing (41), and a curved pipe (42) is provided inside the housing (41). The two ends of the curved pipe (42) are respectively connected to one end of the third electromagnetic three-way valve (7) and one end of the second electromagnetic three-way valve (6).

9. An automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 8, characterized in that: The outer shell (41) is fixedly connected to a first exchange liquid pipe (43) and a second exchange liquid pipe (44) at both ends, and a three-way valve (45) is provided at one end of the first exchange liquid pipe (43) and the second exchange liquid pipe (44).

10. An automatic circulating filtration device for anodizing bath solution of aluminum profiles according to claim 9, characterized in that: The bottom of the base frame (1) is provided with a controller (9). The first hydraulic sensor (35) and the second hydraulic sensor (3906) are both electrically connected to the controller (9). The first electromagnetic three-way valve (3903), the second electromagnetic three-way valve (6), the third electromagnetic three-way valve (7) and the fourth electromagnetic three-way valve (8) are all electrically connected to an external power supply through the controller (9).

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