Electrogalvanizing pre-plating impurity removal equipment and method

Abstract

The invention discloses pre-plating impurity removal equipment and method for electrogalvanizing. The pre-plating impurity removal equipment comprises a power supply device, a pre-plating tank, an inlet roller device, an outlet roller device and a titanium basket device, an inlet end and an outlet end are formed at two ends of the pre-plating tank; the inlet roller device is arranged at the inlet end; the inlet roller device comprises an inlet rack, and an inlet conductive roller assembly and an inlet steering roller assembly which are arranged on the inlet rack; the inlet conductive roller assembly is electrically connected with the power supply device, and the inlet turning roller assembly is used for guiding a base material; the outlet roller device is arranged at the outlet end; the outlet roller device comprises an outlet rack, an outlet conductive roller assembly and an outlet steering roller assembly; the outlet conductive roller assembly is electrically connected with the power supply device, and the outlet turning roller assembly is used for guiding a base material; and the titanium basket device is erected on the pre-plating tank and is electrically connected with the power supply device. The problem that the plate is scratched due to accumulated impurities generated by pre-plating can be solved, and the plating quality and the production efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electroplating, and in particular to an apparatus and method for removing impurities from electrogalvanizing pre-plating. Background Art

[0002] Electrogalvanizing is a process that deposits a zinc layer on a metal surface through an electrolytic process. It is one of the most widely used protective coatings in industry, primarily used to improve the corrosion resistance, aesthetics, and functionality of substrates. Combined with reasonable process control and environmental protection measures, it can meet diverse rust prevention and decorative needs. Pre-galvanizing involves depositing a thin layer of zinc (typically 0.1 to 1 μm) on the substrate surface prior to the actual electrogalvanizing process. This improves the bonding strength, uniformity, and corrosion resistance of the subsequent coating, and prevents problems such as plating leakage and blistering that can occur during direct electroplating.

[0003] During the current implementation of this process, impurities are easily generated in the pre-plating tank, and it is easy to agglomerate and scratch the plate, causing the plate to be downgraded. The process has to be shut down for processing after an output of about 500 tons, seriously affecting the quality, bonding strength, corrosion resistance and production efficiency of the coating. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides an electrogalvanizing pre-plating impurity removal device and method, which can solve the problem of plate scratches caused by accumulated impurities generated by pre-plating, and improve the coating quality and production efficiency.

[0005] The first aspect of the present invention provides an electrogalvanizing pre-plating impurity removal device, comprising a power supply device, a pre-plating tank, an inlet roller device, an outlet roller device and a titanium basket device;

[0006] The pre-plating tank is provided with a receiving cavity for receiving the pre-plating solution, and the pre-plating tank is provided with an inlet end and an outlet end at both ends along its length direction;

[0007] The inlet roller device is arranged at the inlet end of the pre-plating tank; the inlet roller device includes an inlet frame, and an inlet conductive roller assembly and an inlet steering roller assembly arranged on the inlet frame; the inlet conductive roller assembly is electrically connected to the power supply device, and the inlet steering roller assembly is used to guide the substrate to enter the pre-plating tank;

[0008] The outlet roller device is arranged at the outlet end of the pre-plating tank; the outlet roller device includes an outlet frame, and an outlet conductive roller assembly and an outlet steering roller assembly arranged on the outlet frame; the outlet conductive roller assembly is electrically connected to the power supply device, and the outlet steering roller assembly is used to guide the substrate and lead the substrate out of the pre-plating tank;

[0009] The titanium basket device is mounted in the pre-plating tank and is electrically connected to the power supply device.

[0010] In the first aspect of the present invention, as a preferred embodiment, a de-doping zone and a pre-plating zone are formed in the pre-plating tank, the de-doping zone is arranged near the inlet end, and the pre-plating zone is arranged near the outlet end; the titanium basket device includes a de-doping titanium basket assembly and a pre-plating titanium basket assembly, the de-doping titanium basket assembly is mounted in the de-doping zone, and the pre-plating titanium basket assembly is mounted in the pre-plating zone;

[0011] The inlet conductive roller assembly is electrically connected to the positive electrode of the power supply device, so that the substrate serves as an electrolysis anode in the impurity removal area, and the impurity removal titanium basket assembly is electrically connected to the negative electrode of the power supply device, so that the impurity removal titanium basket assembly serves as an electrolysis cathode;

[0012] The outlet conductive roller assembly is electrically connected to the negative pole of the power supply device, so that the substrate acts as an electrolytic cathode in the pre-plating area, and the pre-plating titanium basket assembly is electrically connected to the positive pole of the power supply device, so that the pre-plating titanium basket assembly acts as an electrolytic anode.

[0013] In the first aspect of the present invention, as a preferred embodiment, the inlet conductive roller assembly includes a first connecting frame, a first squeezing roller and a debris-removing conductive roller;

[0014] The two first connecting frames are respectively fixed to both sides of the inlet frame, and both ends of the first squeezing roller are rotatably connected to the first connecting frames via bearing seats; both ends of the impurity-removing conductive roller are rotatably connected to the first connecting frames via sliding bearing seats, and the impurity-removing conductive roller is arranged parallel to the first squeezing roller, and a gap is formed between the impurity-removing conductive roller and the first squeezing roller for the substrate to pass through;

[0015] The inlet conductive roller assembly further includes a first driving member having a fixed end and a telescopic end, the fixed end of the first driving member being fixed to the first connecting frame, and the telescopic end of the first driving member being connected to a sliding bearing seat at the end of the impurity-removing conductive roller;

[0016] Limiting chucks are respectively provided at both ends of the impurity-removing conductive roller.

[0017] In the first aspect of the present invention, as a preferred embodiment, the inlet turning roller assembly includes a second connecting frame, a second squeezing roller, a first turning roller, a second driving member and a second turning roller;

[0018] The two second connecting frames are respectively fixed to both sides of the inlet frame, and both ends of the first steering roller are rotatably connected to the inlet frame via bearing seats; both ends of the second squeezing roller are rotatably connected to the second connecting frames via sliding bearing seats, and the second squeezing roller is arranged parallel to the first steering roller, and a gap is formed between the second squeezing roller and the first steering roller for the substrate to pass through;

[0019] The second driving member has a fixed end and a telescopic end, the fixed end of the second driving member is fixed to the second connecting frame, and the telescopic end of the second driving member is connected to the sliding bearing seat at the end of the second squeezing roller;

[0020] Both ends of the second steering roller are connected to the inlet frame through bearing seats. A guide surface is formed in the circumference of the second steering roller, and the guide surface of the second steering roller extends into the accommodating cavity.

[0021] In the first aspect of the present invention, as a preferred embodiment, the outlet conductive roller assembly includes a first conductive roller arch, a second conductive roller arch and a pre-plated conductive roller; the first conductive roller arch and the second conductive roller arch are respectively fixed to both sides of the outlet frame, and the tops of the first conductive roller arch and the second conductive roller arch are connected by an arch pull beam;

[0022] The two ends of the pre-plated conductive roller are rotatably connected to the first conductive roller arch and the second conductive roller arch through sliding bearing seats respectively; insulating pads are provided at the connection between the sliding bearing seats at the ends of the pre-plated conductive roller and the first conductive roller arch and the second conductive roller arch;

[0023] The end of the pre-plated conductive roller is provided with a copper sleeve, and the two copper sleeves are respectively provided at both ends of the conductive roller through connecting sleeves;

[0024] A carbon brush assembly is provided on the side of each of the first conductive roller arch and the second conductive roller arch; the carbon brush assembly includes a carbon brush panel, a carbon brush holder and a carbon brush body; the carbon brush panel is connected to the first conductive roller arch via a mounting plate, and an insulating pad is provided between the mounting plate and the first conductive roller arch; a plurality of carbon brush holders are arranged in a circular array with the carbon brush panel, and a plurality of carbon brush mounting grooves are provided in a linear array on the carbon brush holder; one end of the carbon brush body is provided in the carbon brush mounting groove, and the other end is used to contact the copper sleeve; an elastic member is provided between the carbon brush body and the carbon brush mounting groove, and the elastic member provides an elastic force that drives the carbon brush body toward the copper sleeve;

[0025] The outlet conductive roller assembly also includes a third driving member, which has a fixed end and a telescopic end. The fixed end of the third driving member is fixed to the top of the first conductive roller arch, and the telescopic end of the third driving member is connected to the sliding bearing seat at the end of the pre-plated conductive roller through an insulating pad.

[0026] In the first aspect of the present invention, as a preferred embodiment, the outlet turning roller assembly includes a third turning roller and a fourth turning roller;

[0027] The two ends of the third steering roller are rotatably connected to the first conductive roller arch and the second conductive roller arch through bearing seats, respectively. The third steering roller is arranged below the pre-plated conductive roller. The third steering roller is arranged parallel to the pre-plated conductive roller, and a gap is formed between the third steering roller and the pre-plated conductive roller for the substrate to pass through.

[0028] Both ends of the fourth steering roller are connected to the outlet frame through bearing seats respectively. A guide surface is formed in the circumference of the fourth steering roller, and the guide surface of the fourth steering roller extends into the accommodating cavity.

[0029] In the first aspect of the present invention, as a preferred embodiment, the impurity removal titanium basket assembly and the pre-plating titanium basket assembly each include an upper titanium basket structure and a lower titanium basket structure, wherein a channel for the substrate to pass through is formed between the upper titanium basket structure and the lower titanium basket structure;

[0030] The upper titanium basket structure and the lower titanium basket structure both include a number of titanium basket units and a first connecting copper bar and a second connecting copper bar. The titanium basket unit is U-shaped, and a loading part is formed in the middle of the titanium basket unit. The loading part is arranged in the pre-plating tank accommodating cavity, and connecting parts are formed at both ends. The two connecting parts extend out of the pre-plating tank accommodating cavity and are respectively connected to the first connecting copper bar and the second connecting copper bar; the loading part has a bottom wall, and side baffles are provided on both sides of the bottom wall, so that a loading slot is formed between the bottom wall and the side baffles, and a number of through holes are distributed on the bottom wall.

[0031] In the first aspect of the present invention, as a preferred embodiment, it further includes a stirring tank, a solution tank, a first filter and a second filter;

[0032] The stirring tank is provided with a stirring component and a cooling component; the stirring tank is connected to the solution tank through a first filter;

[0033] The solution tank is connected to the pre-plating tank through a second filter.

[0034] In the first aspect of the present invention, as a preferred embodiment, the solution tank is arranged below the pre-plating tank in the direction of gravity;

[0035] A plurality of overflow channels are provided inside the pre-plating tank, and overflow ports and reflux ports are formed at both ends of the overflow channels. The overflow ports are formed on the inner wall of the pre-plating tank, and the reflux ports extend to the bottom of the pre-plating tank. The reflux ports are connected to the solution tank.

[0036] A second aspect of the present invention provides a method for removing impurities from electrogalvanized pre-plating, comprising the following steps:

[0037] Providing an electrogalvanizing pre-plating impurity removal device as described in any one of the first aspects of the present invention;

[0038] Add sodium hydroxide, a small amount of water, and zinc oxide into the stirring tank in sequence; dissolve the sodium hydroxide and zinc oxide and stir, then cool the solution in the stirring tank to below 40°C;

[0039] The solution in the stirring tank is pumped into the solution tank through the first filter, and a brightener is added to the solution tank to obtain a pre-plating solution;

[0040] The pre-plating liquid is pumped into the pre-plating tank through the second filter;

[0041] Providing a plurality of zinc plates, and loading the zinc plates into the impurity removal titanium basket assembly;

[0042] The substrate passes through the inlet conductive roller assembly and the inlet steering roller assembly in sequence into the pre-plating tank, and then passes through the impurity removal titanium basket assembly and the pre-plating titanium basket assembly in the pre-plating tank, and then passes through the outlet steering roller assembly and the outlet conductive roller assembly in sequence before being sent out;

[0043] Electrically connect the inlet conductive roller assembly to the positive pole of the power supply device;

[0044] Electrically connect the impurity removal titanium basket assembly to the negative pole of the power supply device;

[0045] The substrate is driven to pass through the inlet conductive roller assembly, the inlet steering roller assembly, the impurity removal titanium basket assembly, the pre-plating titanium basket assembly, the outlet steering roller assembly, and the outlet conductive roller assembly in sequence; and the power supply device is turned on.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The electrogalvanizing pre-plating impurity removal device of the present invention can integrate the electrolytic impurity removal mode and the pre-galvanizing mode into the same device, thereby solving the problem of plate scratches caused by accumulated impurities generated by pre-plating and improving the quality of the pre-plated layer; the electrolytic impurity removal function is directly embedded in the pre-plating tank, eliminating the need for an independent electrolytic tank. Through the partitioned electrolysis technology, plating solution purification and pre-galvanizing can be carried out simultaneously, solving the low efficiency problem of having to shut down for impurity treatment after an output of 500 tons. The electrogalvanizing pre-plating impurity removal device of the present invention can achieve continuous production of 8,000 tons before shutting down for slagging treatment, and does not require plating solution transfer, thereby reducing downtime, significantly improving production efficiency, and extending the life of the plating solution. On the other hand, the electrogalvanizing pre-plating impurity removal device of the present invention can save space and reduce investment by sharing a power supply device and a filtration system between the various modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic structural diagram of the equipment for removing impurities from electrogalvanized pre-plating according to the present invention;

[0049] Figure 2 This is a schematic diagram of the connection between the pre-plating tank for electrogalvanizing pre-plating and impurity removal of the present invention, the inlet roller device, the outlet roller device and the titanium basket device;

[0050] Figure 3 This is a schematic structural diagram of the inlet roller device of the pre-plating tank for electrogalvanizing pre-plating and impurity removal according to the present invention;

[0051] Figure 4 This is a schematic structural diagram of the inlet roller device of the pre-plating tank for electrogalvanizing pre-plating and impurity removal according to the present invention at another angle;

[0052] Figure 5 This is a schematic structural diagram of the outlet roller device of the pre-plating tank for electrogalvanizing pre-plating and impurity removal according to the present invention;

[0053] Figure 6 This is a partial enlarged view of the exit roller device portion A of the pre-plating tank for electrogalvanizing pre-plating and impurity removal according to the present invention;

[0054] Figure 7 This is a schematic structural diagram of a pre-plating titanium basket assembly of a pre-plating tank for electrogalvanizing pre-plating and impurity removal according to the present invention;

[0055] Figure 8 The present invention is a schematic structural diagram of a pre-plating tank for electrogalvanizing pre-plating and impurity removal.

[0056] In the figure: 10, pre-plating tank; 11, impurity removal area; 12, pre-plating area; 13, overflow channel; 131, overflow port; 20, inlet roller device; 21, inlet frame; 22, inlet conductive roller assembly; 221, first connecting frame; 222, first squeeze roller; 223, impurity removal conductive roller; 224, first driving member; 225, limit chuck; 23, inlet steering roller assembly; 231, second connecting frame; 232, second squeeze roller; 233, first steering roller; 234, second driving member; 235, second steering roller; 30, outlet roller device; 31, outlet frame; 32, outlet conductive roller assembly; 321, first conductive Roller arch; 322, second conductive roller arch; 323, arch pull beam; 324, pre-plated conductive roller; 325, copper sleeve; 326, third drive member; 33, outlet steering roller assembly; 331, third steering roller; 332, fourth steering roller; 34, carbon brush assembly; 341, carbon brush panel; 342, carbon brush bracket; 343, carbon brush body; titanium basket device 41, impurity removal titanium basket assembly; 42, pre-plated titanium basket assembly; 421, upper titanium basket structure; 422, lower titanium basket structure; 423, titanium basket unit; 424, first connecting copper bus; 425, second connecting copper bus; 50, solution tank; 60, zinc plate; 70, substrate. DETAILED DESCRIPTION

[0057] Below, the invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0058] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, a connection through an intermediary medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0060] The terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. In addition, the terms "including," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to the process, method, product, or apparatus.

[0061] Example 1:

[0062] Please refer to Figure 1-8 As shown, this embodiment provides an electro-galvanizing pre-plating impurity removal device, including a power supply device (not shown), a pre-plating tank 10, an entrance roller device 20 and an exit roller device 30 respectively installed at both ends of the pre-plating tank 10, and a titanium basket device installed in the pre-plating tank 10.

[0063] The power supply device of this embodiment is a rectifier cabinet, which serves as a power supply device for the equipment and is responsible for converting alternating current (AC) into controllable direct current (DC) and providing stable and adjustable current and voltage for the equipment.

[0064] The pre-plating tank 10 of this embodiment includes an external structure and an inner lining structure. The external structure mainly serves as support and connection and is composed of several steel frames. The inner lining structure is mainly used for contact with the pre-plating solution and is made of PTFE, which has acid and alkali resistance.

[0065] The pre-plating tank 10 has an accommodating cavity formed therein for accommodating the pre-plating solution. The pre-plating tank 10 has an inlet and an outlet formed at both ends along its length. The pre-plating tank 10 has an impurity removal area 11 and a pre-plating area 12 formed therein. The impurity removal area 11 is arranged near the inlet, and the pre-plating area 12 is arranged near the outlet.

[0066] The inlet roller device 20 is disposed at the inlet end of the pre-plating tank 10; the inlet roller device 20 includes an inlet frame 21, and an inlet conductive roller assembly 22 and an inlet steering roller assembly 23 disposed on the inlet frame 21; the inlet conductive roller assembly 22 is electrically connected to the rectifier cabinet, and the inlet steering roller assembly 23 is used to guide the substrate 70 to be plated;

[0067] The outlet roller device 30 is arranged at the outlet end of the pre-plating tank 10; the outlet roller device 30 includes an outlet frame 31, and an outlet conductive roller assembly 32 and an outlet steering roller assembly 33 arranged on the outlet frame 31; the outlet conductive roller assembly 32 is electrically connected to the rectifier cabinet, and the outlet steering roller assembly 33 is used to guide the pre-plated substrate 70.

[0068] The titanium basket device is mounted on the pre-plating tank 10 and includes a titanium basket assembly 41 for removing impurities and a titanium basket assembly 42 for pre-plating. Both the titanium basket assembly 41 for removing impurities and the titanium basket assembly 42 for pre-plating are electrically connected to the rectifier cabinet.

[0069] Based on the above structure, this embodiment provides a stable and adjustable current and voltage by setting a power supply device, and a pre-plating tank 10 receiving cavity to hold the pre-plating solution. The pre-plating solution of this embodiment includes sodium hydroxide, zinc oxide, a light agent, etc.; a titanium basket device is provided for loading the zinc plate 60, and the zinc ions (Zn) in the plating solution are dynamically maintained by the zinc plate 60. 2+) concentration, while assisting in impurity removal. In this embodiment, the substrate 70 is a steel strip, which passes through the conductive roller assembly 22 and the entrance steering roller assembly 23 in sequence and enters the pre-plating tank 10, passes through the titanium basket device, and electrically connects the entrance conductive roller assembly 22 with the positive pole of the rectifier cabinet, so that the substrate 70 in contact with the entrance conductive roller assembly acts as an electrolytic anode in the pre-plating tank 10, and the impurity removal titanium basket assembly 41 is electrically connected to the negative pole of the rectifier cabinet, so that the impurity removal titanium basket assembly 41 acts as an electrolytic cathode, realizing the activation of the electrolytic impurity removal mode, and impurity ions (such as Cu 2 +、Pb 2 +) is reduced to metal at the cathode and deposited on the impurity-removing titanium basket assembly 41; by electrically connecting the outlet conductive roller assembly 32 to the negative pole of the power supply device, the substrate 70 is used as an electrolytic cathode in the pre-plating tank 10, and the pre-plating titanium basket assembly 42 is electrically connected to the positive pole of the power supply device, so that the pre-plating titanium basket assembly 42 is used as an electrolytic anode, and the pre-galvanizing mode is enabled, and the zinc ions (Zn 2 +) is reduced and deposited on the surface of the substrate 70, and finally sent out through the outlet steering roller assembly 33 and the outlet conductive roller assembly 32. The electrogalvanizing pre-plating impurity removal equipment of this embodiment can integrate the electrolytic impurity removal mode and the pre-galvanizing mode into the same equipment, solve the problem of plate scratches caused by accumulated impurities generated by pre-plating, and improve the quality of the pre-plating layer; the electrolytic impurity removal function is directly embedded in the pre-plating tank 10, without the need for an independent electrolytic tank, and the plating solution purification and pre-galvanizing can be carried out simultaneously through the partitioned electrolysis technology, solving the low efficiency problem of having to stop the machine to deal with impurities when the output is 500 tons. The electrogalvanizing pre-plating impurity removal equipment of this embodiment can achieve continuous production of 8,000 tons before stopping to deal with slagging, and there is no need to transfer the plating solution, which reduces downtime, greatly improves production efficiency, and extends the life of the plating solution. On the other hand, the electrogalvanizing pre-plating impurity removal equipment of this embodiment can save space and reduce investment by sharing the power supply device and the filtration system.

[0070] Specifically, the inlet conductive roller assembly 22 includes a first connecting frame 221, a first squeezing roller 222 and a impurity-removing conductive roller 223;

[0071] The two first connecting frames 221 are respectively fixed vertically on the left and right sides of the entrance frame 21, and the two ends of the first squeezing roller 222 are rotatably connected to the first connecting frames 221 through bearing seats; the impurity-removing conductive roller 223 is arranged below the first squeezing roller 222, and the two ends of the impurity-removing conductive roller 223 are rotatably connected to the first connecting frames 221 through sliding bearing seats. The impurity-removing conductive roller 223 is arranged parallel to the first squeezing roller 222, and a gap is formed between the impurity-removing conductive roller 223 and the first squeezing roller 222 for the substrate 70 to pass through; when in use, the strip steel substrate 70 is passed through the gap between the two.

[0072] The inlet conductive roller assembly 22 also includes a first driving member 224 having a fixed end and a telescopic end. The fixed end of the first driving member 224 is fixed to the first connecting frame 221, while the telescopic end of the first driving member 224 is connected to the sliding bearing seat at the end of the impurity-removing conductive roller 223. The first driving member 224 drives the impurity-removing conductive roller 223 toward or away from the first squeezing roller 222, ensuring full contact between the impurity-removing conductive roller 223 and the substrate 70. Limiting chucks 225 are provided at each end of the impurity-removing conductive roller 223 to limit the extreme position of the substrate 70 and prevent excessive displacement of the substrate 70.

[0073] Furthermore, the inlet turning roller assembly 23 includes a second connecting frame 231 , a second squeezing roller 232 , a first turning roller 233 , a second driving member 234 and a second turning roller 235 .

[0074] The two second connecting frames 231 are respectively vertically fixed to the left and right sides of the inlet frame 21. The second connecting frames 231 are arranged on the side of the first connecting frame 221 close to the pre-plating tank 10. The two ends of the first steering roller 233 are rotatably connected to the inlet frame 21 via bearing seats. The two ends of the second squeezing roller 232 are rotatably connected to the second connecting frames 231 via sliding bearing seats. The second squeezing roller 232 is arranged parallel to the first steering roller 233. A gap is formed between the second squeezing roller 232 and the first steering roller 233 for the substrate 70 to pass through.

[0075] The second driving member 234 has a fixed end and a telescopic end. The fixed end of the second driving member 234 is fixed to the second connecting frame 231, and the telescopic end of the second driving member 234 is connected to the sliding bearing seat at the end of the second squeezing roller 232. The second driving member 234 drives the second squeezing roller 232 to move closer to or away from the first steering roller 233, thereby adjusting the gap width between the two to adapt to the guidance of substrates 70 of different thicknesses and adjust the tension of the substrate 70 at the same time.

[0076] The two ends of the second steering roller 235 are connected to the entrance frame 21 through bearing seats. The second steering roller 235 forms a guiding surface in the circumference. The guiding surface of the second steering roller 235 extends into the accommodating cavity. After the strip steel substrate 70 passes through the entrance conductive roller assembly 22, it is sequentially wound around the first steering roller 233 and the second steering roller 235 in the circumference to guide the strip steel substrate 70 to below the liquid level of the pre-plating liquid in the pre-plating cavity.

[0077] The outlet conductive roller assembly 32 of this embodiment includes a first conductive roller arch 321, a second conductive roller arch 322, and a pre-plated conductive roller 324. The first conductive roller arch 321 and the second conductive roller arch 322 are respectively fixed vertically to the left and right sides of the outlet frame 31. The tops of the first conductive roller arch 321 and the second conductive roller arch 322 are connected by an arch pull beam 323.

[0078] The two ends of the pre-plated conductive roller 324 are rotatably connected to the first conductive roller arch 321 and the second conductive roller arch 322 through sliding bearing seats respectively; insulating pads are provided at the connection between the sliding bearing seats at the ends of the pre-plated conductive roller 324 and the first conductive roller arch 321 and the second conductive roller arch 322;

[0079] The end of the pre-plated conductive roller 324 is provided with a copper sleeve 325, and the two copper sleeves 325 are respectively provided at both ends of the conductive roller through connecting sleeves;

[0080] The first conductive roller arch 321 and the second conductive roller arch 322 are both provided with a carbon brush assembly 34 on their sides; they are used to be electrically connected to the rectifier cabinet; specifically, the carbon brush assembly 34 includes a carbon brush panel 341, a carbon brush bracket 342 and a carbon brush body 343; the carbon brush panel 341 is connected to the first conductive roller arch 321 through a mounting plate, and an insulating pad is provided between the mounting plate and the first conductive roller arch 321; a plurality of the carbon brush brackets 342 are arranged in a ring array with the carbon brush panel 341, and the carbon brush brackets 343 are connected to the carbon brush panel 341. There are several carbon brush mounting slots in the linear array on 42; one end of the carbon brush body 343 is set in the carbon brush mounting slot, and the other end is used to contact the copper sleeve 325; an elastic member is set between the carbon brush body 343 and the carbon brush mounting slot, and the elastic member provides an elastic force to drive the carbon brush body 343 to approach the copper sleeve 325; the carbon brush body 343 is in close contact with the rotating copper sleeve 325 to conduct current from the rectifier cabinet to the pre-plating conductive roller 324, realizing dynamic current conduction and ensuring current stability during the pre-galvanizing process.

[0081] The outlet conductive roller assembly 32 also includes a third driving member 326, which has a fixed end and a telescopic end. The fixed end of the third driving member 326 is fixed to the top of the first conductive roller arch 321, and the telescopic end of the third driving member 326 is connected to the sliding bearing seat at the end of the pre-plated conductive roller 324 through an insulating pad; the pre-plated conductive roller 324 is driven to translate in the vertical direction by the third driving member 326.

[0082] The outlet steering roller assembly 33 includes a third steering roller 331 and a fourth steering roller 332. The third steering roller 331 is rotatably connected to the first and second conductive roller arches 321 and 322, respectively, via bearing blocks. The third steering roller 331 is positioned below and parallel to the pre-plating conductive roller 324, creating a gap between the third steering roller 331 and the pre-plating conductive roller 324 for the substrate 70 to pass through. A third driving member 326 adjusts the gap between the third steering roller 331 and the pre-plating conductive roller 324 to accommodate substrates 70 of varying thicknesses, ensuring sufficient contact between the substrate 70 and the pre-plating conductive roller 324 and adjusting the tension of the substrate 70 during delivery. The fourth steering roller 332 is connected to the outlet frame 31 via bearing blocks at both ends. A guide surface is formed circumferentially on the fourth steering roller 332, extending into the receiving cavity. By sequentially winding the steel strip substrate 70 around the fourth turning roller 332 and the third turning roller 331 in the circumferential direction, the steel strip substrate 70 is always maintained below the liquid surface in the pre-plating chamber, and then the steel strip substrate 70 is guided and sent out from below the liquid surface.

[0083] Furthermore, both the impurity removal titanium basket assembly 41 and the pre-plating titanium basket assembly 42 include an upper titanium basket structure 421 and a lower titanium basket structure 422, forming a passageway between the upper and lower titanium basket structures 421, 422 for the substrate 70 to pass through. By symmetrically distributing the upper and lower titanium basket structures 421, 422 above and below the substrate 70, a uniform coating is ensured on both sides of the substrate 70, ensuring a uniform and dense pre-plating layer, laying a good foundation for subsequent main galvanizing.

[0084] Specifically, the upper titanium basket structure 421 and the lower titanium basket structure 422 both include a number of titanium basket units 423 and a first connecting copper bar 424 and a second connecting copper bar 425. The titanium basket unit 423 is U-shaped, and a loading part is formed in the middle of the titanium basket unit 423. The loading part is arranged in the accommodating cavity of the pre-plating tank 10, and connecting parts are formed at both ends. The two connecting parts extend out of the accommodating cavity of the pre-plating tank 10 and are respectively connected to the first connecting copper bar 424 and the second connecting copper bar 425; the loading part has a bottom wall, and side baffles are provided on both sides of the bottom wall, so that a loading slot is formed between the bottom wall and the side baffles, and a number of through holes are distributed on the bottom wall.

[0085] In some preferred embodiments, the method further includes a stirring tank, a solution tank 50, a first filter and a second filter.

[0086] The stirring tank, which dissolves sodium hydroxide and zinc oxide, releases heat during the dissolution process. In this embodiment, the stirring tank is equipped with a stirring assembly and a cooling assembly. The stirring assembly helps fully dissolve the electrolyte, while the cooling assembly rapidly cools the solution. The stirring tank is connected to the first filter via a PP pipe. The other end of the first filter is also connected to the solution tank 50 via a PP pipe. The cooled solution is transferred between the stirring tank and the solution tank 50 via the first filter.

[0087] The solution tank 50 is connected to the second filter through a PP pipe, and the other end of the second filter is connected to the bottom of the pre-plating tank 10 through a PP pipe, forming a bottom inlet mode. The solution is transferred between the solution tank 50 and the pre-plating tank 10 through the second filter.

[0088] The solution tank 50 of this embodiment is arranged below the pre-plating tank 10 in the direction of gravity; the pre-plating tank 10 is provided with a plurality of overflow channels 13, with an overflow port 131 and a reflux port formed at both ends of the overflow channel 13. The overflow port 131 is formed on the inner wall of the pre-plating tank 10, and the reflux port extends to the bottom of the pre-plating tank 10, and the reflux port is connected to the solution tank 50. The plating solution in the pre-plating tank 10 can flow back into the solution tank 50 through the overflow channel 13 under the action of gravity, continuously discharging old solution and replenishing new solution, thereby realizing dynamic circulation of solution between the solution tank 50 and the pre-plating tank 10, maintaining the activity of the plating solution, and adapting to various needs such as continuous production and impurity removal; and the overall structure is compact.

[0089] Furthermore, the overflow ports 131 can be evenly distributed around the inner wall of the pre-plating tank 10. A confluence groove connected to each overflow channel 13 is provided at the bottom of the pre-plating tank 10, and the outlet of the reflux groove is connected to the solution tank 50. The overflow ports 131 evenly distributed around the inner wall of the pre-plating tank 10 can capture grease accumulated on the surface of the plating solution during the electroplating process, foam or suspended particles generated by the decomposition of organic matter, etc., to avoid local accumulation. The evenly distributed overflow ports 131 cooperate with the bottom liquid inlet to form a vertical circulation pattern, stabilize the current distribution, form a stable laminar flow, and improve the quality of the coating.

[0090] Example 2:

[0091] This embodiment provides a method for removing impurities from electrogalvanizing pre-plating based on embodiment 1, comprising the following steps:

[0092] Providing the electrogalvanizing pre-plating impurity removal equipment as described in Example 1;

[0093] Add sodium hydroxide, a small amount of water, and zinc oxide into the stirring tank in sequence; start the stirring component, dissolve the sodium hydroxide and zinc oxide, and then stir them to completely dissolve them. The dissolution process releases a large amount of heat reaching above 90°C. Use the cooling component to cool the solution in the stirring tank to below 40°C.

[0094] The solution in the stirring tank is pumped into the solution tank 50 through the first filter, and a brightener is added to the solution tank 50 to obtain a pre-plating solution; the appearance and performance of the coating are improved by adding the brightener.

[0095] The pre-plating liquid is pumped into the pre-plating tank 10 through the second filter.

[0096] A plurality of zinc plates 60 are provided and loaded into the impurity-removing titanium basket assembly 41 .

[0097] The substrate 70 passes through the inlet conductive roller assembly 22 and the inlet steering roller assembly 23 in sequence into the pre-plating tank 10, and the substrate 70 passes through the impurity removal titanium basket assembly 41 and the pre-plating titanium basket assembly 42 in the pre-plating tank 10, and then passes through the outlet steering roller assembly 33 and the outlet conductive roller assembly 32 in sequence before being sent out;

[0098] The inlet conductive roller assembly 22 is electrically connected to the positive pole of the rectifier cabinet.

[0099] The impurity removal titanium basket assembly 41 is electrically connected to the negative electrode of the rectifier cabinet.

[0100] The substrate 70 is driven to pass through the inlet conductive roller assembly 22, the inlet steering roller assembly 23, the impurity removal titanium basket assembly 41, the pre-plating titanium basket assembly 42, the outlet steering roller assembly 33, and the outlet conductive roller assembly 32 in sequence; the rectifier cabinet is turned on and the current is adjusted to 1000A.

[0101] The power device for driving the substrate 70 to pass through each device in sequence is well known to those skilled in the art and will not be described in detail here.

[0102] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An electrogalvanizing pre-plating impurity removal device, characterized in that: It includes a power supply device, a pre-plating tank, an entrance roller device, an exit roller device and a titanium basket device; The pre-plating tank is provided with a receiving cavity for receiving the pre-plating solution, and the pre-plating tank is provided with an inlet end and an outlet end at both ends along its length direction; The inlet roller device is arranged at the inlet end of the pre-plating tank; the inlet roller device includes an inlet frame, and an inlet conductive roller assembly and an inlet steering roller assembly arranged on the inlet frame; the inlet conductive roller assembly is electrically connected to the power supply device, and the inlet steering roller assembly is used to guide the substrate to enter the pre-plating tank; The outlet roller device is arranged at the outlet end of the pre-plating tank; the outlet roller device includes an outlet frame, and an outlet conductive roller assembly and an outlet steering roller assembly arranged on the outlet frame; the outlet conductive roller assembly is electrically connected to the power supply device, and the outlet steering roller assembly is used to guide the substrate and lead the substrate out of the pre-plating tank; The titanium basket device is mounted in the pre-plating tank and is electrically connected to the power supply device.

2. The electrogalvanizing pre-plating impurity removal equipment according to claim 1, characterized in that: The pre-plating tank is formed with a de-impurity zone and a pre-plating zone, the de-impurity zone is arranged near the inlet end, and the pre-plating zone is arranged near the outlet end; the titanium basket device includes a de-impurity titanium basket assembly and a pre-plating titanium basket assembly, the de-impurity titanium basket assembly is mounted in the de-impurity zone, and the pre-plating titanium basket assembly is mounted in the pre-plating zone; The inlet conductive roller assembly is electrically connected to the positive electrode of the power supply device, so that the substrate serves as an electrolysis anode in the impurity removal area, and the impurity removal titanium basket assembly is electrically connected to the negative electrode of the power supply device, so that the impurity removal titanium basket assembly serves as an electrolysis cathode; The outlet conductive roller assembly is electrically connected to the negative pole of the power supply device, so that the substrate acts as an electrolytic cathode in the pre-plating area, and the pre-plating titanium basket assembly is electrically connected to the positive pole of the power supply device, so that the pre-plating titanium basket assembly acts as an electrolytic anode.

3. The device for removing impurities from electrogalvanized pre-plating according to claim 2, characterized in that: The inlet conductive roller assembly includes a first connecting frame, a first squeezing roller and a cleaning conductive roller; The two first connecting frames are respectively fixed to both sides of the inlet frame, and both ends of the first squeezing roller are rotatably connected to the first connecting frames via bearing seats; both ends of the impurity-removing conductive roller are rotatably connected to the first connecting frames via sliding bearing seats, and the impurity-removing conductive roller is arranged parallel to the first squeezing roller, and a gap is formed between the impurity-removing conductive roller and the first squeezing roller for the substrate to pass through; The inlet conductive roller assembly further includes a first driving member having a fixed end and a telescopic end, the fixed end of the first driving member being fixed to the first connecting frame, and the telescopic end of the first driving member being connected to a sliding bearing seat at the end of the impurity-removing conductive roller; Limiting chucks are respectively provided at both ends of the impurity-removing conductive roller.

4. The device for removing impurities from electrogalvanized pre-plating according to claim 3, characterized in that: The inlet turning roller assembly includes a second connecting frame, a second squeezing roller, a first turning roller, a second driving member and a second turning roller; The two second connecting frames are respectively fixed to both sides of the inlet frame, and both ends of the first steering roller are rotatably connected to the inlet frame via bearing seats; both ends of the second squeezing roller are rotatably connected to the second connecting frames via sliding bearing seats, and the second squeezing roller is arranged parallel to the first steering roller, and a gap is formed between the second squeezing roller and the first steering roller for the substrate to pass through; The second driving member has a fixed end and a telescopic end, the fixed end of the second driving member is fixed to the second connecting frame, and the telescopic end of the second driving member is connected to the sliding bearing seat at the end of the second squeezing roller; Both ends of the second steering roller are connected to the inlet frame through bearing seats. A guide surface is formed in the circumference of the second steering roller, and the guide surface of the second steering roller extends into the accommodating cavity.

5. The equipment for removing impurities from electrogalvanized pre-plating according to claim 2, characterized in that: The outlet conductive roller assembly includes a first conductive roller arch, a second conductive roller arch and a pre-plated conductive roller; the first conductive roller arch and the second conductive roller arch are respectively fixed on both sides of the outlet frame, and the tops of the first conductive roller arch and the second conductive roller arch are connected by arch pull beams; The two ends of the pre-plated conductive roller are rotatably connected to the first conductive roller arch and the second conductive roller arch through sliding bearing seats respectively; insulating pads are provided at the connection between the sliding bearing seats at the ends of the pre-plated conductive roller and the first conductive roller arch and the second conductive roller arch; The end of the pre-plated conductive roller is provided with a copper sleeve, and the two copper sleeves are respectively provided at both ends of the conductive roller through connecting sleeves; A carbon brush assembly is provided on the side of each of the first conductive roller arch and the second conductive roller arch; the carbon brush assembly includes a carbon brush panel, a carbon brush holder and a carbon brush body; the carbon brush panel is connected to the first conductive roller arch via a mounting plate, and an insulating pad is provided between the mounting plate and the first conductive roller arch; a plurality of carbon brush holders are arranged in a circular array with the carbon brush panel, and a plurality of carbon brush mounting grooves are provided in a linear array on the carbon brush holder; one end of the carbon brush body is provided in the carbon brush mounting groove, and the other end is used to contact the copper sleeve; an elastic member is provided between the carbon brush body and the carbon brush mounting groove, and the elastic member provides an elastic force that drives the carbon brush body toward the copper sleeve; The outlet conductive roller assembly also includes a third driving member, which has a fixed end and a telescopic end. The fixed end of the third driving member is fixed to the top of the first conductive roller arch, and the telescopic end of the third driving member is connected to the sliding bearing seat at the end of the pre-plated conductive roller through an insulating pad.

6. The equipment for removing impurities from electrogalvanized pre-plating according to claim 5, characterized in that: The outlet steering roller assembly includes a third steering roller and a fourth steering roller; The two ends of the third steering roller are rotatably connected to the first conductive roller arch and the second conductive roller arch through bearing seats, respectively. The third steering roller is arranged below the pre-plated conductive roller. The third steering roller is arranged parallel to the pre-plated conductive roller, and a gap is formed between the third steering roller and the pre-plated conductive roller for the substrate to pass through. Both ends of the fourth steering roller are connected to the outlet frame through bearing seats respectively. A guide surface is formed in the circumference of the fourth steering roller, and the guide surface of the fourth steering roller extends into the accommodating cavity.

7. The equipment for removing impurities from electrogalvanized pre-plating according to claim 5, characterized in that: The impurity removal titanium basket assembly and the pre-plating titanium basket assembly both include an upper titanium basket structure and a lower titanium basket structure, and a channel for the substrate to pass through is formed between the upper titanium basket structure and the lower titanium basket structure; The upper titanium basket structure and the lower titanium basket structure both include a number of titanium basket units and a first connecting copper bar and a second connecting copper bar. The titanium basket unit is U-shaped, and a loading part is formed in the middle of the titanium basket unit. The loading part is arranged in the pre-plating tank accommodating cavity, and connecting parts are formed at both ends. The two connecting parts extend out of the pre-plating tank accommodating cavity and are respectively connected to the first connecting copper bar and the second connecting copper bar; the loading part has a bottom wall, and side baffles are provided on both sides of the bottom wall, so that a loading slot is formed between the bottom wall and the side baffles, and a number of through holes are distributed on the bottom wall.

8. The equipment for removing impurities from electrogalvanized pre-plating according to claim 2, characterized in that: It also includes a stirring tank, a solution tank, a first filter and a second filter; The stirring tank is provided with a stirring component and a cooling component; the stirring tank is connected to the solution tank through a first filter; The solution tank is connected to the pre-plating tank through a second filter.

9. The electrogalvanizing pre-plating impurity removal equipment according to claim 8, characterized in that: The solution tank is arranged below the pre-plating tank in the direction of gravity; A plurality of overflow channels are provided inside the pre-plating tank, and overflow ports and reflux ports are formed at both ends of the overflow channels. The overflow ports are formed on the inner wall of the pre-plating tank, and the reflux ports extend to the bottom of the pre-plating tank. The reflux ports are connected to the solution tank.

10. A method for removing impurities from electrogalvanizing pre-plating, characterized in that: The following steps are involved: Provide an electrogalvanizing pre-plating impurity removal device as described in any one of claims 1 to 9; Add sodium hydroxide, a small amount of water, and zinc oxide into the stirring tank in sequence; Dissolve sodium hydroxide and zinc oxide and stir, then cool the solution in the stirring tank to below 40°C; The solution in the stirring tank is pumped into the solution tank through the first filter, and a brightener is added to the solution tank to obtain a pre-plating solution; The pre-plating liquid is pumped into the pre-plating tank through the second filter; Providing a plurality of zinc plates, and loading the zinc plates into the impurity removal titanium basket assembly; The substrate passes through the inlet conductive roller assembly and the inlet steering roller assembly in sequence into the pre-plating tank, and then passes through the impurity removal titanium basket assembly and the pre-plating titanium basket assembly in the pre-plating tank, and then passes through the outlet steering roller assembly and the outlet conductive roller assembly in sequence before being sent out; Electrically connect the inlet conductive roller assembly to the positive pole of the power supply device; Electrically connect the impurity removal titanium basket assembly to the negative pole of the power supply device; The substrate is driven to pass through the inlet conductive roller assembly, the inlet steering roller assembly, the impurity removal titanium basket assembly, the pre-plating titanium basket assembly, the outlet steering roller assembly, and the outlet conductive roller assembly in sequence; and the power supply device is turned on.

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