Electroplating liquid filtering device in electroplating machining process

Abstract

The invention relates to the technical field of electroplating liquid filtering and recycling, in particular to an electroplating liquid filtering device in the electroplating machining process. The device comprises a filter cartridge, a filter assembly perpendicular to the axis of the filter cartridge is arranged in the middle of the filter cartridge, a stirring assembly is arranged at the axis of the upstream side of the filter assembly, and a feeding assembly used for intermittently adding a flocculating agent is arranged at the top of the stirring assembly; the filtering assembly comprises a first intercepting module located on the upstream side and a second intercepting module located on the downstream side; the first intercepting module is used for intercepting large-particle impurities in water, the second intercepting module is used for intercepting small-particle impurities in the water, backflow generated when electroplating liquid impacts the second intercepting module can back wash the first intercepting module, and therefore fine floccules remaining in filter holes are dredged; accelerating water flow near the accelerating channel can be prevented from taking away small-particle impurities, and therefore the interception capacity of the second interception plate on small impurities is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of electroplating liquid filtration and recovery, in particular to an electroplating liquid filtration device in an electroplating process. Background Art

[0002] When filtering and recovering electroplating solutions, flocculants are often added to improve filtration efficiency by removing fine metals and impurities. However, flocculants tend to aggregate quickly after addition, making it difficult for the trapped flocculants to fully contact the substances in the electroplating solution.

[0003] At present, existing electroplating liquid filtration devices are usually equipped with a stirring device, which uses the shear force of the stirring paddle to break up the agglomerates, exposing the flocculant originally wrapped inside, so as to increase the contact frequency between the internal flocculant and the object to be removed. After the agglomerates are broken up, the fine flocs produced follow the electrolyte water flow through the filter device. Not only is the filter device unable to effectively intercept the fine flocs, but as the fine flocs passing through the filter pores increase, it is also easy to cause the filter pores to become clogged. When an interception device is set on the downstream side of the filter device to intercept fine particles, the obstacle properties of the interception device cause the water flow rate at the edge to accelerate, which in turn causes the accelerated water flow to carry away the fine impurities originally intercepted by the interception device.

[0004] In view of this, we propose a plating liquid filtering device during the electroplating process to improve the shortcomings of the existing technology. Summary of the Invention

[0005] The present invention provides a plating liquid filtration device during electroplating processing, which solves the problem that the filter device is not only unable to effectively intercept fine flocs, but also easily causes clogging of the filter pores as the fine flocs pass through the filter pores. When an interception device is set on the downstream side of the filter device to intercept fine particles, the obstruction properties of the interception device cause the water flow rate at the edge to accelerate, that is:

[0006] This causes the water flow to accelerate and carry away the fine impurities that were originally intercepted by the interception device.

[0007] To achieve the above-mentioned purpose, the electroplating liquid filtering device in the electroplating process includes a filter cartridge, a filter assembly perpendicular to the axis of the filter cartridge is provided in the middle of the filter cartridge, a stirring assembly is provided at the axis center on the upstream side of the filter assembly, and a feeding assembly for intermittently adding flocculant is provided on the top of the stirring assembly;

[0008] The filter assembly includes a first interception module located on the upstream side and a second interception module located on the downstream side. The top of the stirring assembly is higher than the level of the electroplating solution. The stirring assembly is used to chop up flocculants generated in the filter cartridge.

[0009] The outer wall of the first interception module is in close contact with the inner wall of the filter cartridge, the outer diameter of the second interception module is smaller than the inner diameter of the filter cartridge, and the edge of the second interception module generates accelerated water flow;

[0010] The first interception module is used to intercept large particles of impurities in the water, and the second interception module is used to intercept small particles of impurities in the water. The backflow generated by the second interception module can backwash the first interception module, and the second interception module can prevent the accelerated water flow at its edge from carrying away small particles of impurities.

[0011] In the above technical solution, the first interception module includes a first interception plate, and a flange is provided on the upstream edge of the first interception plate.

[0012] The second interception module includes a second interception plate located on the downstream side of the flange. The thickness of the second interception plate gradually increases from the center to the edge. The second interception plate is fixedly connected to the first interception plate.

[0013] An acceleration channel is formed between the edge of the second intercepting plate and the inner wall of the filter cartridge, and the upstream side of the second intercepting plate is roughened.

[0014] In another technical solution, after the electroplating liquid flow is added to the inside of the filter cartridge, the drug storage chamber injects flocculants into the filter cartridge at intervals. The flocculants combine with impurities in the electroplating liquid to form floc aggregates. As the water flows through the first interception plate, flocculants with larger particle sizes (larger than the aperture of the filter holes on the first interception plate) are intercepted by the first interception plate, and the fine flocculants chopped by the stirring paddle pass through the filter holes and are intercepted by the second interception plate. A small number of fine flocculants remain in the filter holes.

[0015] Since the side of the second interception plate close to the first interception plate presents a concave arc surface (its shape refers to the difference between a flat cylinder and a cone), when the electroplating liquid water flows onto the arc surface of the second interception plate, a backflow will be formed to form a backwash effect on the filter holes of the first interception plate, thereby clearing the fine flocs blocked in the filter holes. At the same time, the second interception plate with arc surface treatment increases its carrying capacity for fine flocs.

[0016] Because the acceleration channel formed by the edge of the second interceptor plate and the inner wall of the filter cartridge is narrow, the water flowing through the acceleration channel accelerates, potentially causing flocs previously trapped by the second interceptor plate to be swept away by the accelerated water flow. The roughened curved surface of the second interceptor plate increases its frictional resistance to flocs, thereby enhancing its floc retention capacity. Furthermore, because the thickness of the second interceptor plate gradually increases from the center to the edge, the water flow drives the small flocs trapped within the second interceptor plate's concave curved surface toward the acceleration channel, causing their movement to resemble "climbing a slope." This further increases the difficulty of the small flocs leaving the second interceptor plate's concave curved surface, thereby enhancing its floc retention capacity.

[0017] Based on the above description, it can be seen that compared with the prior art, the beneficial effects of the present invention are:

[0018] The first interception module is used to intercept large particles of impurities in the water, and the second interception module is used to intercept small particles of impurities in the water. The backflow generated by the electroplating liquid hitting the second interception module can backwash the first interception module, thereby clearing the fine flocs retained in the filter holes. The concave arc surface on the upstream side of the second interception module can prevent the accelerated water flow near the acceleration channel from carrying away small particles of impurities, thereby enhancing the second interception plate's ability to retain fine impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0021] Figure 2 It is a partially cutaway perspective view of the present invention;

[0022] Figure 3 It is a partially cutaway front view of the present invention;

[0023] Figure 4 A structural perspective diagram of the stirring assembly of the present invention;

[0024] Figure 5 This is one of the structural perspective views of the feeding assembly of the present invention;

[0025] Figure 6 This is the second structural perspective view of the feeding assembly of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle;

[0027] Figure 8 It is a cutaway left side view of the feeding assembly of the present invention;

[0028] Figure 9 This is the third structural perspective view of the feeding assembly of the present invention;

[0029] Figure 10 is a cutaway perspective view of the filter assembly of the present invention;

[0030] Figure 11 It is a left side view of the local structure of the filter assembly of the present invention;

[0031] Figure 12 It is a partially cut-away front view of the filter assembly of the present invention.

[0032] The meaning of each number in the figure is:

[0033] 100, filter cartridge;

[0034] 200, stirring assembly; main rod (210), main rod; 220, stirring paddle; 230, first bevel gear;

[0035] 300, feeding assembly; 310, second bevel gear; 311, guide rod; 312, limiting ring; 313, active protrusion; 314, driven protrusion; 320, guide rail; 330, slide seat; 331, pulley; 340, medicine storage bin; 341, limiting seat; 342, slide rod; 343, spring;

[0036] 400, filter assembly; 410, first interception plate; 411, flange; 420, second interception plate; 421, acceleration channel. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] When an interception device (hereinafter referred to as the second interception plate 420) is provided on the downstream side of the filter device (hereinafter referred to as the first interception plate 410) to intercept fine particles, the water flow velocity at the edge is accelerated due to the barrier properties of the interception device. Figure 1-Figure 3 shown.

[0039] The present embodiment provides a device for filtering electroplating liquid during electroplating, comprising a filter cartridge 100, a filter assembly 400 disposed in the middle of the filter cartridge 100 and perpendicular to the axis of the filter cartridge 100, a stirring assembly 200 disposed at the axis of the upstream side of the filter assembly 400, and a feeding assembly 300 disposed at the top of the stirring assembly 200 for intermittently adding a flocculant.

[0040] The filter assembly 400 includes a first interception module located on the upstream side and a second interception module located on the downstream side. The top of the stirring assembly 200 is higher than the level of the electroplating solution. The stirring assembly 200 is used to chop up the flocculants generated in the filter cartridge 100.

[0041] The outer wall of the first interception module is in close contact with the inner wall of the filter cartridge 100, the outer diameter of the second interception module is smaller than the inner diameter of the filter cartridge 100, and the edge of the second interception module generates accelerated water flow;

[0042] The first interception module is used to intercept large particles of impurities in the water, and the second interception module is used to intercept small particles of impurities in the water. The backflow generated by the second interception module can backwash the first interception module, and the second interception module can prevent the accelerated water flow at its edge from carrying away small particles of impurities.

[0043] like Figure 4 As shown, the stirring assembly 200 includes a main rod 210 located at the axis of the filter cartridge 100 , a plurality of stirring paddles 220 are provided axially on the main rod 210 , and a first bevel gear 230 is coaxially connected to the main rod 210 .

[0044] The improvement is that the tops of the plurality of stirring paddles 220 are all higher than the liquid level of the electroplating solution in the filter cartridge 100 .

[0045] It should be noted that after the power is turned on, the motor drives the main rod 210 coaxially connected to its output shaft to rotate, and the main rod 210 drives the multiple stirring paddles 220 arranged circumferentially thereon to rotate. The stirring paddles 220 exposed to the water surface continuously chop the flocculants in the electroplating solution, so that the flocculants inside that have not had time to come into contact with the impurities are exposed again, thereby improving the adsorption capacity of impurities in the electroplating solution.

[0046] exist Figure 5-Figure 9 In the figure, the feeding assembly 300 includes a second bevel gear 310 and a guide rail 320. The second bevel gear 310 is meshed with the first bevel gear 230. The guide rail 320 is located at the top of the filter cartridge 100. The top of the guide rail 320 is slidably connected to a slide 330. The slide 330 is movably provided with a drug storage bin 340 on the side close to the second bevel gear 310. The bottom of the drug storage bin 340 is connected to the interior of the filter cartridge 100. The slide 330 is used to drive the drug storage bin 340 containing flocculant to slide along the guide rail 320. The top of the second bevel gear 310 is coaxially connected to a guide rod 311. The top outer periphery of the guide rod 311 is provided with a limiting ring 312. The limiting ring 312 is fixedly connected to the drug storage bin 340. The second bevel gear 310 is used to move the drug storage bin 340 to intermittently discharge materials.

[0047] Not only that, the outer ring of the guide rod 311 is fixedly connected with multiple active protrusions 313, and the multiple active protrusions 313 are all located inside the limiting ring 312. The inner ring of the limiting ring 312 is fixedly connected with multiple driven protrusions 314. The multiple active protrusions 313 and the multiple driven protrusions 314 are staggered with each other. When the guide rod 311 rotates, the multiple active protrusions 313 can move the medicine storage bin 340.

[0048] Furthermore, a plurality of pulleys 331 are rotatably connected to the sliding seat 330 , and the plurality of pulleys 331 are all in contact with the outer surface of the guide rail 320 .

[0049] Furthermore, the sliding seat 330 is fixedly connected to the limiting seat 341 on the side close to the medicine storage bin 340. The limiting seat 341 is provided with multiple pairs of limiting caps on the side close to the medicine storage bin 340. A sliding rod 342 is fixedly connected between the two limiting caps at the same height. The medicine storage bin 340 is slidingly connected to the multiple sliding rods 342. A spring 343 is provided on the periphery of the sliding rod 342 between the medicine storage bin 340 and the limiting cap.

[0050] That is to say, while the stirring paddle 220 stirs the electroplating solution, the first bevel gear 230 rotates synchronously with the main rod (210), and the first bevel gear 230 drives the second bevel gear 310 to rotate. The second bevel gear 310 rotates through the rotation of multiple active protrusions 313 on the periphery of the guide rod 311, and the multiple driven protrusions 314 inside the limiting ring 312 move in an interlaced manner, so that the drug storage bin 340 continuously shakes left and right on the slide rod 342, and the drug storage bin 340 follows the slide seat 330 to move along the track of the guide rail 320, so that the drug storage bin 340 will intermittently apply flocculant to the filter cartridge 100, thereby preventing the flocculant from accumulating somewhere in the filter cartridge 100 and improving the adsorption capacity of impurities in the electroplating solution.

[0051] In order to prevent the accelerated water flow from carrying away the fine impurities originally intercepted by the second interception plate 420, the present application sets a second interception module on the downstream side of the first interception module.

[0052] Based on the above description, Figure 10-12 To illustrate the preferential effect of the filter assembly 400 , the first interception module includes a first interception plate 410 , and a flange 411 is provided on the upstream edge of the first interception plate 410 .

[0053] The improvement is that the second interception module includes a second interception plate 420 located on the downstream side of the flange 411 , the thickness of the second interception plate 420 gradually increases from the center to the edge, and the second interception plate 420 is fixedly connected to the first interception plate 410 .

[0054] Furthermore, the edge of the second intercepting plate 420 and the inner wall of the filter cartridge 100 form an acceleration channel 421 , and the upstream side of the second intercepting plate 420 is roughened.

[0055] It should be noted that after the electroplating liquid flow is added to the inside of the filter cartridge 100, the drug storage chamber 340 injects flocculant into the inside of the filter cartridge 100 at intervals. The flocculant combines with the impurities in the electroplating liquid to form floc aggregates. As the water flows through the first intercepting plate 410, the flocculants with larger particle sizes (larger than the aperture of the filter holes on the first intercepting plate 410) are intercepted by the first intercepting plate 410, and the fine flocculants chopped by the stirring paddle 220 pass through the filter holes and are intercepted by the second intercepting plate 420. A small number of fine flocculants remain in the filter holes.

[0056] Since the second interception plate 420 has a concave arc surface on the side close to the first interception plate 410 (its shape refers to the difference between a cylinder and a cone), when the electroplating liquid flows into the concave arc surface of the second interception plate 420, a backflow will be formed to form a backwash effect on the filter holes of the first interception plate 410, thereby clearing the fine flocs blocked in the filter holes. At the same time, the surface area of the second interception plate 420 after the arc surface treatment is increased, thereby increasing its carrying capacity for fine flocs.

[0057] Because the acceleration channel 421 formed by the edge of the second intercepting plate 420 and the inner wall of the filter cartridge 100 is relatively narrow, the water flowing through the acceleration channel 421 accelerates, potentially causing flocs previously trapped by the second intercepting plate 420 to be swept away by the accelerated water flow. The roughened concave surface of the second intercepting plate 420 increases frictional resistance to the flocs, thereby enhancing their floc retention. Furthermore, because the thickness of the second intercepting plate 420 gradually increases from the center to the edge, the water flow drives the small flocs within the concave surface of the second intercepting plate 420 toward the acceleration channel 421, creating a motion similar to "climbing a slope." This further increases the difficulty for the small flocs to escape the concave surface of the second intercepting plate 420, thereby enhancing their floc retention.

[0058] In summary, the working principle of the present invention is as follows:

[0059] The main rod (210) drives the plurality of stirring paddles 220 arranged circumferentially thereof to rotate, and the stirring paddles 220 exposed to the water surface continuously chop up the flocculants in the electroplating solution, so that the flocculants inside that have not had time to come into contact with impurities are exposed again, thereby improving the adsorption capacity of impurities in the electroplating solution.

[0060] While the stirring paddle 220 stirs the electroplating liquid, the drug storage bin 340 continuously shakes left and right on the slide rod 342, and the drug storage bin 340 follows the slide seat 330 and moves along the track of the guide rail 320. Therefore, the drug storage bin 340 will intermittently apply flocculant to the filter cartridge 100, thereby preventing the flocculant from accumulating somewhere in the filter cartridge 100 and improving the adsorption capacity of impurities in the electroplating liquid.

[0061] As water flows through the first interception plate 410 , larger flocs are intercepted by the first interception plate 410 , while smaller flocs chopped by the stirring paddle 220 pass through the filter holes and are intercepted by the second interception plate 420 , while a small amount of smaller flocs remain in the filter holes.

[0062] Since the second interception plate 420 has a concave arc surface on one side close to the first interception plate 410, when the electroplating liquid flows into the concave arc surface of the second interception plate 420, a backflow will be formed to form a backwash effect on the filter holes of the first interception plate 410, thereby clearing the fine flocs blocked in the filter holes. At the same time, the surface area of the second interception plate 420 after the arc surface treatment is increased, thereby increasing its carrying capacity for fine flocs.

[0063] Because the acceleration channel 421 formed by the edge of the second intercepting plate 420 and the inner wall of the filter cartridge 100 is relatively narrow, the water flowing through the acceleration channel 421 accelerates, potentially causing flocs previously trapped by the second intercepting plate 420 to be swept away by the accelerated water flow. The roughened concave surface of the second intercepting plate 420 increases frictional resistance to the flocs, thereby enhancing their floc retention. Furthermore, because the thickness of the second intercepting plate 420 gradually increases from the center to the edge, the water flow drives the small flocs within the concave surface of the second intercepting plate 420 toward the acceleration channel 421, creating a motion similar to "climbing a slope." This further increases the difficulty for the small flocs to escape the concave surface of the second intercepting plate 420, thereby enhancing their floc retention.

[0064] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for filtering electroplating liquid during electroplating processing, comprising a filter cartridge (100), a filter assembly (400) perpendicular to the axis of the filter cartridge (100) being provided in the middle of the filter cartridge (100), a stirring assembly (200) being provided at the axis center on the upstream side of the filter assembly (400), a feeding assembly (300) for intermittently adding a flocculant being provided at the top of the stirring assembly (200), and characterized in that: The filter assembly (400) comprises a first interception module located on the upstream side and a second interception module located on the downstream side. The top end of the stirring assembly (200) is higher than the level of the electroplating solution. The stirring assembly (200) is used to chop flocculants generated in the filter cartridge (100). The outer wall of the first interception module is in close contact with the inner wall of the filter cartridge (100), the outer diameter of the second interception module is smaller than the inner diameter of the filter cartridge (100), and the edge of the second interception module generates accelerated water flow; The first interception module is used to intercept large particles of impurities in the water, and the second interception module is used to intercept small particles of impurities in the water. The backflow generated by the second interception module can backwash the first interception module, and the second interception module can prevent the accelerated water flow at its edge from carrying away small particles of impurities.

2. The electroplating solution filtering device according to claim 1, characterized in that: The stirring assembly (200) comprises a main rod (210) located at the axis of the filter cartridge (100), a plurality of stirring paddles (220) are provided axially on the main rod (210), and a first bevel gear (230) is coaxially connected to the main rod (210).

3. The electroplating solution filtering device according to claim 2, characterized in that: The tops of the plurality of stirring paddles (220) are all higher than the liquid level of the electroplating solution in the filter cartridge (100).

4. The electroplating solution filtering device according to claim 2, characterized in that: The feeding assembly (300) includes a second bevel gear (310) and a guide rail (320), wherein the second bevel gear (310) is meshed with the first bevel gear (230), and the guide rail (320) is located at the top of the filter cartridge (100), and a slide seat (330) is slidably connected to the top of the guide rail (320), and a medicine storage bin (340) is movably provided on the side of the slide seat (330) close to the second bevel gear (310), and the bottom of the medicine storage bin (340) is The slide (330) is connected to the interior of the filter cartridge (100), and is used to drive the medicine storage bin (340) containing flocculant to slide along the guide rail (320). The top of the second bevel gear (310) is coaxially connected to a guide rod (311). The top of the guide rod (311) is provided with a limiting ring (312) on the outer periphery. The limiting ring (312) is fixedly connected to the medicine storage bin (340). The second bevel gear (310) is used to move the medicine storage bin (340) to intermittently discharge materials.

5. The electroplating solution filtering device during electroplating according to claim 4, characterized in that: The outer ring of the guide rod (311) is fixedly connected with a plurality of active protrusions (313), and the plurality of active protrusions (313) are all located inside the limiting ring (312). The inner ring of the limiting ring (312) is fixedly connected with a plurality of driven protrusions (314). The plurality of active protrusions (313) and the plurality of driven protrusions (314) are arranged alternately with each other. When the guide rod (311) rotates, the plurality of active protrusions (313) can move the medicine storage bin (340).

6. The electroplating solution filtering device during electroplating according to claim 4, characterized in that: A plurality of pulleys (331) are rotatably connected inside the slide seat (330), and the plurality of pulleys (331) are all in contact with the surface of the guide rail (320).

7. The electroplating solution filtering device during electroplating according to claim 4, characterized in that: The sliding seat (330) is fixedly connected to a limiting seat (341) on a side close to the medicine storage bin (340), and the limiting seat (341) is provided with a plurality of pairs of limiting caps on a side close to the medicine storage bin (340), and a sliding rod (342) is fixedly connected between two limiting caps at the same height, and the medicine storage bin (340) is slidably connected to the plurality of sliding rods (342), and a spring (343) is sleeved on the periphery of the sliding rod (342) between the medicine storage bin (340) and the limiting cap.

8. The electroplating solution filtering device during electroplating according to claim 1, characterized in that: The first interception module comprises a first interception plate (410), and an upstream edge of the first interception plate (410) is provided with a flange (411).

9. The electroplating solution filtering device during electroplating according to claim 8, characterized in that: The second interception module includes a second interception plate (420) located on the downstream side of the flange (411), the thickness of the second interception plate (420) gradually increases from the center to the edge, and the second interception plate (420) is fixedly connected to the first interception plate (410).

10. The electroplating solution filtering device during electroplating according to claim 9, characterized in that: The edge of the second intercepting plate (420) and the inner wall of the filter cartridge (100) form an acceleration channel (421), and the upstream side of the second intercepting plate (420) is roughened.

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