Cleaning device and crude foil engine

Abstract

The utility model provides a cleaning device and a crude foil engine. The crude foil engine comprises an electrolytic bath and a cathode roller rotationally arranged in the electrolytic bath. The cleaning device is used for the crude foil engine and comprises an acid spraying piece, and the acid spraying piece comprises an acid pickling pipe and is used for spraying acid to a copper foil on a cathode roller; the acid spraying piece further comprises a liquid dropping pipe, the liquid dropping pipe is communicated with the liquid inlet end of the acid pickling pipe and used for introducing washing liquid into the acid pickling pipe, and the washing liquid flows from the liquid inlet end to the liquid outlet end along the bottom wall of the acid pickling pipe and then is discharged. The cleaning device can wash the pickling pipe, can prevent the pickling pipe from crystallizing, and effectively improves the quality of copper foil.

Description

Technical Field

[0001] The present application relates to the technical field of electrolytic copper foil manufacturing, and in particular to a cleaning device and a foil production machine. Background Art

[0002] Electrolytic copper foil is an indispensable raw material for the production of printed circuit boards (PCB), copper clad laminates (CCL) and lithium batteries (Li-ion). Electrolytic copper foil is mainly produced by foil making machines. The flow of electrolyte in the foil making machine realizes the electrolysis of metal to generate copper foil. As the cathode roller rotates and the copper foil plated on the surface of the cathode roller is continuously peeled off, copper foil of different thicknesses can be obtained.

[0003] After the electrolytic copper foil is produced on the surface of the cathode roller, it needs to be pickled with copper sulfate electrolyte at an appropriate temperature to remove the oxide film on the surface of the copper foil to ensure the quality of the copper foil. At present, the common pickling device uses a pickling tube with evenly distributed small holes to spray the pickling liquid (copper sulfate electrolyte) evenly on the surface of the copper foil to achieve the purpose of pickling.

[0004] However, as the spraying time gradually increases, copper sulfate crystals will be produced in the pickling tube. As the number of crystals increases, the spray port is easily blocked, resulting in insufficient spray volume, poor pickling effect, and abnormalities such as oxidation of the copper foil surface. It will also cause uneven spray volume or angle deviation at the spray port, causing abnormalities such as seersucker and color difference on the foil surface of the copper foil. When the crystals fall into the electrolytic cell or adhere to the surface of the copper foil, the copper foil will produce abnormalities such as indentations, pinholes, and particle prints. Moreover, there is a risk of crystals falling off to the cathode roller, which can easily scratch the roller surface, resulting in scratches, bright lines and other abnormalities on the foil surface, affecting the quality of the copper foil. Utility Model Content

[0005] The present application provides a cleaning device and a copper foil machine, aiming to solve the problem in the prior art that the pickling tube in the cleaning device for the copper foil machine is prone to produce copper sulfate crystals, which is very likely to affect the quality of the copper foil.

[0006] In order to solve the above technical problems, the first technical solution provided by the present application is to provide a cleaning device. The cleaning device is used for a copper foil machine, which includes an electrolytic cell and a cathode roller rotatably arranged in the electrolytic cell; the cleaning device includes:

[0007] Acid spraying parts, including pickling pipes, are used to spray acid onto the copper foil on the cathode roller;

[0008] The acid spraying part also includes a dripping pipe, which is connected to the liquid inlet end of the pickling pipe and is used to introduce water washing liquid into the pickling pipe. The water washing liquid flows from the liquid inlet end along the bottom wall of the pickling pipe to the liquid outlet end and is discharged.

[0009] There is a preset angle between the axis of the pickling tube and the axis of the cathode roller, the preset angle is 10°~20°, and the height of the liquid inlet end of the pickling tube is higher than the height of the liquid outlet end; wherein the height of the liquid inlet end is the height from the liquid inlet end to the reference plane, the height of the liquid outlet end is the height from the liquid outlet end to the reference plane, and the reference plane is the horizontal plane where the liquid outlet end is located.

[0010] Among them, the axis of the pickling tube is parallel to the axis of the cathode roller; a flow control component is provided on the drip tube, which is used to control the flow rate and flow velocity of the water washing liquid in the drip tube, so that the water washing liquid flows along the bottom wall of the pickling tube at a preset flow rate and preset flow rate to the liquid outlet end for discharge; the flow control component includes a micro water pump.

[0011] Wherein, a water inlet hole is provided at the bottom wall position of the liquid inlet end of the pickling pipe or at the side wall of the liquid inlet end near the bottom wall, the aperture of the water inlet hole matches the diameter of the dripping pipe, and the dripping pipe is sealed and connected with the pickling pipe through the water inlet hole;

[0012] A drainage hole is provided at the bottom wall position of the liquid outlet end of the pickling pipe or at a position of the side wall of the liquid outlet end close to the bottom wall, so that the washing liquid can be discharged through the drainage hole.

[0013] The acid spraying part further comprises a drain pipe, which is sealed and connected with the pickling pipe through a drain hole so that the washing liquid can be discharged through the drain pipe.

[0014] Wherein, the cleaning device also includes a water spraying part, and the water spraying part includes a water washing pipe and a water inlet pipe;

[0015] The water washing pipe is used to spray water to the copper foil on the cathode roller, and the pickling pipe and the water washing pipe are arranged in sequence along the rotation direction of the cathode roller;

[0016] One end of the washing pipe close to the dripping pipe is connected with the water inlet pipe, and the water inlet pipe is used to introduce washing liquid into the washing pipe; the dripping pipe is connected to the water inlet pipe, so that the washing liquid in the water inlet pipe enters the pickling pipe through the dripping pipe.

[0017] A liquid separation hole is provided on the water inlet pipe, the diameter of the liquid separation hole matches the diameter of the dripping pipe, and the dripping pipe is sealed and connected with the water inlet pipe through the liquid separation hole.

[0018] Wherein, the acid spraying part also includes a liquid inlet pipe and a liquid discharge pipe;

[0019] The liquid inlet pipe is connected to the liquid inlet end of the pickling pipe and is used to introduce acid into the pickling pipe;

[0020] The drain pipe is connected to the liquid outlet end of the pickling pipe, and a valve is provided on the drain pipe; when the pickling pipe sprays acid to the copper foil on the cathode roller, the valve is closed; after the pickling pipe stops spraying acid to the copper foil on the cathode roller, the valve is opened to allow the accumulated liquid in the pickling pipe to be discharged through the drain pipe; the other end of the drain pipe leads to the electrolytic cell.

[0021] The diameter of the pickling pipe is 35-45 mm, and the pickling flow rate in the pickling pipe is 15-35 m 3 / h, the spray angle of the pickling pipe is 45°~60°; the diameter of the water washing pipe is 35-45mm, and the water washing flow rate in the water washing pipe is 15~35m 3 / h, the spray angle of the water washing pipe is 40°~50°; the diameter of the dripping pipe is 3-5mm, and the water washing flow rate in the dripping pipe is 0.72~1.8L / h.

[0022] In order to solve the above technical problems, the second technical solution provided by the present application is to provide a copper foil machine. The copper foil machine comprises:

[0023] Electrolyzer;

[0024] A cathode roller is rotatably disposed in the electrolytic cell;

[0025] The cleaning device is the cleaning device as described in the above technical solution.

[0026] Beneficial effects of the present application: Different from the prior art, the present application provides a cleaning device and a foil machine, the cleaning device includes an acid spraying part, the acid spraying part includes a pickling pipe, through which acid is sprayed onto the copper foil on the cathode roller to remove the oxide film on the surface of the copper foil and prevent oxidation of the copper foil surface. The embodiment of the present application provides a dripping pipe, and connects the dripping pipe with the liquid inlet end of the pickling pipe, so that water washing liquid is introduced into the pickling pipe through the dripping pipe, and the water washing liquid flows from the liquid inlet end along the bottom wall of the pickling pipe to the liquid outlet end and then is discharged, thereby achieving flushing of the inner wall of the pickling pipe. In specific applications, when the pickling tube sprays acid on the copper foil on the cathode roller, the bottom wall of the pickling tube can be continuously flushed through the dropper, thereby effectively preventing the formation of copper sulfate crystals at the bottom of the tube, thereby preventing the crystals from clogging the acid spray holes to ensure the quality of the copper foil; at the same time, after the pickling tube completes the pickling spray, the bottom wall of the pickling tube can be flushed through the dropper to prevent crystallization due to the presence of accumulated liquid in the pickling tube, further preventing crystallization in the pickling tube from affecting the pickling effect, and effectively avoiding the problem of deterioration of the copper foil quality caused by crystallization in the pickling tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 It is a structural schematic diagram of a foil production machine provided in one embodiment of the present application;

[0029] Figure 2 yes Figure 1 An enlarged schematic cross-sectional view of a cleaning device in an embodiment;

[0030] Figure 3 It is a schematic diagram of the structure of the cleaning device provided in the first embodiment of the present application;

[0031] Figure 4 is a schematic structural diagram of a cleaning device provided in a second embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of the structure of the cleaning device provided in the third embodiment of the present application.

[0033] Reference numerals:

[0034] 100-foil machine; 10-electrolytic cell; 20-cathode roller; 30-cleaning device; 31-acid spraying part; 311-pickling pipe; 3111-liquid inlet end; 3112-liquid outlet end; 3113-acid spraying hole; 3114-water inlet hole; 3115-water outlet hole; 312-drip pipe; 3121-flow control part; 313-liquid inlet pipe; 314-drain pipe; 315-drain pipe; 3151-valve; 32-water spraying part; 321-water washing pipe; 3211-water spraying hole; 322-water inlet pipe; 3221-liquid separation hole; 33-scraper; 34-water squeezing wheel; 35-drying part; 36-bracket; 37-dust cover; 371-opening; 40-winding roller; α, β-angles. DETAILED DESCRIPTION

[0035] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0036] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0041] See also Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a foil production machine provided in one embodiment of the present application, Figure 2 yes Figure 1A schematic cross-sectional enlargement of the cleaning device in the embodiment. In the present embodiment, a foil machine 100 is provided, which is used to produce electrolytic copper foil. The foil machine 100 includes an electrolytic cell 10, a cathode roller 20 and a cleaning device 30. The electrolytic cell 10 is provided with an anode plate (not shown), and the cathode roller 20 is rotatably arranged in the electrolytic cell 10. The electrolyte is passed into the electrolytic cell 10 and the electrolyte in the electrolytic cell 10 is electrolyzed by powering on to generate copper foil on the circumferential surface of the cathode roller 20. Usually, the electrolyte uses a copper sulfate solution of an appropriate concentration. In the embodiment of the present application, the copper sulfate solution is used as the electrolyte for illustration. Of course, in other embodiments, other electrolytes may also be used, and this is not specifically limited. The cleaning device 30 is arranged on one side of the cathode roller 20, opposite to the circumferential surface of the cathode roller 20, and is used to pickle the copper foil on the surface of the cathode roller 20 to prevent oxidation of the copper foil.

[0042] Please refer to Figure 3 , Figure 3 3 is a schematic diagram of the structure of the cleaning device provided in the first embodiment of the present application. In this embodiment, the cleaning device 30 includes an acid spraying member 31, which is used to spray acid toward the copper foil on the cathode roller 20 to prevent oxidation of the copper foil. It should be noted that the acid spraying in the embodiment of the present application refers to spraying copper sulfate electrolyte. By spraying acid on the copper foil on the cathode roller 20 in the electrolytic cell 10, the problem of crystallization on the copper foil can be effectively avoided, and the preparation quality of the copper foil can be guaranteed.

[0043] Specifically, the acid spraying part 31 includes a pickling pipe 311, the extension direction of which is substantially consistent with the axial direction of the cathode roller 20, and the pickling pipe 311 is provided with a plurality of acid spray holes 3113 in the direction toward the cathode roller 20, and the plurality of acid spray holes 3113 are arranged along the axial direction of the pickling pipe 311, specifically, they can be arranged at equal intervals, or the hole spacing, distribution position, and aperture of each acid spray hole 3113 can be specifically adjusted according to the spray angle, spray intensity, and other characteristics of each position of the pickling pipe 311, so as to achieve the best pickling effect. In addition, in the axial direction of the cathode tube, the length of the pickling pipe 311 is equal to or greater than the length of the cathode roller 20, so as to ensure the uniformity of the acid spraying of the copper foil on the cathode roller 20. In addition, the acid spray holes 3113 can be arranged in multiple rows in the circumferential direction of the pickling pipe 311.

[0044] During the copper foil production process, the pickling tube 311 continuously sprays acid onto the copper foil on the cathode roller 20 through the acid spray holes 3113. As the acid spraying continues, copper sulfate crystals are easily generated in the pickling tube 311. As the crystals gradually increase, they may even block some of the acid spray holes 3113, which may easily lead to insufficient spraying volume, substandard pickling effect, oxidation of the foil surface of the copper foil, and other abnormalities. In addition, the spraying volume of the acid spray holes 3113 may be uneven, or the spraying angle may deviate, causing the copper foil to produce abnormalities such as seersucker and foil surface color difference. Moreover, after a long spraying time, copper sulfate crystals will also be generated under the pickling tube 311. When the crystals fall into the electrolytic cell 10 or adhere to the surface of the copper foil, the copper foil will produce abnormalities such as pits, pinholes, and particle prints. Secondly, if the copper sulfate crystals fall off onto the cathode roller 20, they may easily scratch the roller surface, causing scratches, bright lines, and other abnormalities on the foil surface. All of the above problems will affect the quality of the copper foil and cause the quality of the copper foil to deteriorate.

[0045] To solve the above problems, in the embodiment of the present application, the acid spray part 31 also includes a dripping pipe 312, which is connected to the liquid inlet end 3111 of the pickling pipe 311, and is used to pass a water washing liquid into the pickling pipe 311, and the water washing liquid flows from the liquid inlet end 3111 of the pickling pipe 311 along the bottom wall of the pickling pipe 311 to the liquid outlet end 3112 and then is discharged, thereby flushing the inner wall of the pickling pipe 311. It should be noted that the water washing liquid in the embodiment of the present application refers to industrial pure water. Specifically, the pickling pipe 311 has two opposite ends, one end of which is the liquid inlet end 3111, and the other end of which is the liquid outlet end 3112; wherein the liquid inlet end 3111 is connected to a liquid inlet pipe 313, so that acid, that is, copper sulfate electrolyte, is passed into the pickling pipe 311 through the liquid inlet pipe 313. Furthermore, the cleaning device 30 may also include a pump, which is arranged on the liquid inlet pipe 313, and the two ends of the liquid inlet pipe 313 are respectively connected to the pickling pipe 311 and the electrolytic cell 10, so that the electrolyte in the electrolytic cell 10 can be pumped into the pickling pipe 311 and sprayed toward the copper foil through the acid spray hole 3113.

[0046] Specifically, during the process of the pickling tube 311 spraying acid on the copper foil on the cathode roller 20, the bottom wall of the pickling tube 311 can be continuously flushed through the above-mentioned dripping tube 312, so as to effectively prevent the formation of copper sulfate crystals at the bottom of the tube, and then prevent the crystals from clogging the acid spraying hole 3113, so as to ensure the quality of the copper foil. At the same time, after the pickling tube 311 completes the pickling spraying, the bottom wall of the pickling tube 311 can be flushed through the dripping tube 312 to prevent crystals from being generated in the pickling tube 311 due to the presence of effusion, and further prevent the formation of crystals in the pickling tube 311 and affect the pickling effect, which can effectively avoid the problem of the quality of the copper foil being deteriorated due to the formation of crystals in the pickling tube 311. Alternatively, according to the use requirements, a water washing liquid is introduced into the pickling tube 311 through the dripping tube 312 when the pickling tube 311 needs to be flushed, so as to continuously flush the bottom wall of the pickling tube 311 within a specific time period, so as to effectively prevent the formation of copper sulfate crystals at the bottom of the tube.

[0047] Specifically, in this embodiment, there is a preset angle α between the axis of the pickling pipe 311 and the axis of the cathode roller 20, and the height of the liquid inlet end 3111 of the pickling pipe 311 is higher than the height of the liquid outlet end 3112. The height of the liquid inlet end 3111 is the height from the liquid inlet end 3111 to the reference plane, and the height of the liquid outlet end 3112 is the height from the liquid outlet end 3112 to the reference plane; the reference plane is the horizontal plane where the liquid outlet end 3112 is located, or the reference plane can also be the ground. It can be understood that by making the height of the liquid inlet end 3111 of the pickling tube 311 higher than the height of the liquid outlet end 3112, the pickling tube 311 is in an inclined state with one end higher than the other end, and the dropper tube 312 is connected to the higher end of the pickling tube 311, so that after the dropper tube 312 introduces washing liquid into the pickling tube 311, the washing liquid can naturally flow from the higher end to the lower end under the action of potential energy, thereby continuously flushing the bottom of the pickling tube 311 and effectively preventing crystallization at the bottom of the tube.

[0048] The preset angle α between the axis of the pickling tube 311 and the axis of the cathode roller 20 is 10° to 20°, and the preset angle can be set according to the flow rate and flow velocity of the dripping tube 312 and the pipe diameter of the pickling tube 311 to achieve the best flushing effect. For example, if the pipe diameter of the pickling tube 311 is set to 35 mm and the flow rate and flow velocity of the dripping tube 312 are small, the preset angle α can be set between 15° and 20°. If the flow rate and flow velocity of the dripping tube 312 are large, the preset angle α can be set between 10° and 15°. In this embodiment, the diameter of the pickling tube 311 is set to 40 mm, the diameter of the dripping tube 312 is set to 4 mm, the flow rate of the dripping tube 312 is set to 0.72-1.8 L / h, and the preset angle α is set to 15°, that is, the inclination angle of the pickling tube 311 is set to 15° to ensure that the washing liquid introduced into the dripping tube 312 can flow completely through the entire pickling tube 311 to rinse the entire pickling tube 311, thereby ensuring that no copper sulfate crystals are generated in the tube to improve the quality of the copper foil.

[0049] Furthermore, a water inlet hole 3114 is provided at the bottom wall of the liquid inlet end 3111 of the pickling pipe 311 or at a position of the side wall of the liquid inlet end 3111 close to the bottom wall, and the dripping pipe 312 is sealed and connected with the pickling pipe 311 through the water inlet hole 3114, so that water washing liquid is introduced into the pickling pipe 311 through the dripping pipe 312; specifically, the aperture of the water inlet hole 3114 matches the diameter of the dripping pipe 312, so as to facilitate the sealing setting between the dripping pipe 312 and the water inlet hole 3114, thereby avoiding liquid leakage; specifically, it can be sealed by an elastic sealing ring and / or waterproof glue. A drainage hole is provided at the bottom wall of the liquid outlet end 3112 of the pickling pipe 311 or at a position of the side wall of the liquid outlet end 3112 close to the bottom wall, so that the water washing liquid in the pipe can be discharged through the drainage hole. It can be understood that the water inlet 3114 is set at the bottom wall position of the liquid inlet end 3111 or the side wall of the liquid inlet end 3111 close to the bottom wall, so that the washing liquid directly enters from the bottom of the pickling pipe 311, and the distance between the washing liquid and the acid injection hole 3113 is increased, so that the washing liquid can be prevented from being sprayed out from the acid injection hole 3113 along with the copper sulfate electrolyte in the pipe, so as to ensure that the washing liquid can flow along the bottom wall of the pickling pipe 311 to the liquid outlet end 3112, so as to achieve a better flushing effect and avoid crystallization in the pipe; the drainage hole is set at the bottom wall position of the liquid outlet end 3112 or the side wall of the liquid inlet end 3111 close to the bottom wall, so that the washing liquid can be completely discharged from the drainage hole, and the washing liquid can be prevented from remaining in the pipe. And because the flow rate of the washing liquid entering the pickling pipe 311 is small, the washing liquid can directly flow into the electrolytic cell 10 after being discharged from the drainage hole, and will not affect the electrolysis system.

[0050] In this embodiment, the diameter of the pickling pipe 311 is 35-45 mm, the pickling flow rate in the pickling pipe 311 is 15-35 m3 / h, and the spray angle of the pickling pipe 311 is 45°-60°. The spray angle refers to the angle between the pickling liquid sprayed from the acid spray hole 3113 and the horizontal direction; it can be understood that, with the horizontal direction as the reference direction, the pickling liquid is sprayed from the acid spray hole 3113 in an oblique upward direction onto the copper foil of the cathode roller 20, and the oblique upward angle is 45°-60°, so that the spray path of the pickling liquid from the acid spray hole 3113 to the copper foil on the surface of the cathode roller 20 is relatively small, and a larger spray area on the copper foil can also be ensured to improve the pickling efficiency. In this embodiment, the diameter of the pickling pipe 311 can be set slightly larger, for example, set to 40 mm, so as to provide space for setting the water inlet hole 3114 and the drainage hole of the pickling pipe 311 without affecting the connection between the liquid inlet pipe 313 and the pickling pipe 311.

[0051] The diameter of the dripping tube 312 is 3-5 mm, for example, 3 mm, 4 mm or 5 mm; the water washing flow rate in the dripping tube 312 is 0.72-1.8 L / h. In this embodiment, the diameter of the dripping tube 312 is 4 mm, and the dripping flow of the water washing liquid in the dripping tube 312 is controlled at 1 drop / second, and one drop is 0.2-0.5 ml, so that the acid spraying work of the pickling tube 311 will not be affected during the continuous flushing of the pickling tube 311.

[0052] See also Figure 4 , Figure 4 3 is a schematic diagram of the structure of the cleaning device provided in the second embodiment of the present application. In this embodiment, the acid spraying member 31 also includes a drain pipe 314, which is connected to the drain hole so that the water washing liquid in the pickling pipe 311 can be discharged through the drain pipe 314. Specifically, the drip pipe 312 and the drain pipe 314 are both hoses, and the drain pipe 314 can be passed into the electrolytic cell 10 to discharge the pickling liquid in the pickling pipe 311 into the electrolytic cell 10. This method is simple, convenient and easy to implement. Alternatively, the drain pipe 314 can also be introduced into a designated position or container to discharge the pickling liquid in the pickling pipe 311 to a designated position or container. The discharge method of discharging the water washing liquid in the pickling pipe 311 to the electrolytic cell 10 or a designated position or container through the drain pipe 314 can avoid the generation of electrolyte crystallization in the pickling pipe 311 at the position of the drain hole.

[0053] Furthermore, in this embodiment, the acid spraying member 31 also includes a drain pipe 315, which is connected to the liquid outlet end 3112 of the pickling pipe 311, and a valve 3151 is provided on the drain pipe 315. Specifically, when the pickling pipe 311 sprays acid to the copper foil on the cathode roller 20, the valve 3151 is in a closed state to maintain the pressure in the pickling pipe 311, to ensure the appropriate acid spraying force and spraying angle, so as to achieve the desired cleaning effect; after the pickling pipe 311 stops spraying acid to the copper foil on the cathode roller 20, the valve 3151 is opened to discharge the accumulated liquid in the pickling pipe 311 through the drain pipe 315, so as to avoid the accumulation of liquid in the pipe and the generation of electrolyte crystallization. Specifically, the valve 3151 can be a manually controlled mechanical valve 3151 or an electrically controlled valve 3151, which can be set according to actual needs. The other end of the drain pipe 315 can be connected to the electrolytic cell 10 to drain the accumulated liquid in the pipe into the electrolytic cell 10. Since the acid in the pipe is also copper sulfate electrolyte, draining the accumulated liquid in the pipe to the electrolytic cell 10 will not affect the system, and the accumulated liquid in the pipe can be effectively utilized to improve its utilization rate and reduce costs. Alternatively, the drain pipe 315 can also be introduced into a designated location or container for easy processing.

[0054] In this embodiment, the cleaning device 30 further includes a water spraying member 32, and the water spraying member 32 includes a water washing pipe 321 and a water inlet pipe 322. Figure 1 As shown, the water washing pipe 321 is used to spray water to the copper foil on the cathode roller 20, and the pickling pipe 311 and the water washing pipe 321 are sequentially arranged along the rotation direction of the cathode roller 20, so that after the pickling pipe 311 pickles the copper foil on the cathode roller 20, the water washing pipe 321 sprays water to the pickled copper foil, thereby washing the copper foil. Specifically, the axial direction of the water washing pipe 321 is parallel to the axial direction of the cathode roller 20, and the water washing pipe 321 opens a plurality of water spray holes 3211 toward the cleaning area of ​​the cathode roller 20, and in the axial direction of the cathode roller 20, the length of the water washing pipe 321 is greater than or equal to the length of the cathode roller 20, so as to ensure the uniformity of water spraying on the copper foil on the cathode roller 20. At the same time, the water spray holes 3211 are arranged at equal intervals along the axial direction of the water washing pipe 321. In addition, the water spray holes 3211 can also be arranged in multiple rows in the circumferential direction of the water spray pipe.

[0055] Specifically, the diameter of the water washing pipe 321 is 35-45 mm, the water washing flow rate in the water washing pipe 321 is 15-35 m3 / h, and the spray angle of the water washing pipe 321 is 40°-50°. Among them, the water washing flow rate refers to the flow rate of the water washing liquid entering the water washing pipe 321, and the spray angle refers to the angle between the water washing liquid sprayed from the water spray hole 3211 and the horizontal direction; it can be understood that, with the horizontal direction as the reference direction, the water washing liquid sprays from the water spray hole 3211 in an obliquely upward direction to the copper foil surface on the cathode roller 20, and the oblique upward angle is 40°-50°, so that the spray path of the water washing liquid from the water spray hole 3211 to the copper foil on the cathode roller 20 is relatively small, and a large spray area is guaranteed on the copper foil to improve the water washing efficiency. Specifically, the spray angle can be set according to the relative position of the water washing pipe 321 and the cathode roller 20 to achieve the best water washing effect. In this embodiment, the water washing pipe 321 and the acid washing pipe 311 can be made of PVC pipes of the same specifications, and the diameter of the water washing pipe 321 can also be set to 40 mm.

[0056] Furthermore, one end of the water washing pipe 321 close to the dripping pipe 312 is connected to the water inlet pipe 322, so that the washing liquid is introduced into the water washing pipe 321 through the water inlet pipe 322; the dripping pipe 312 is connected to the water inlet pipe 322, so that the washing liquid in the water inlet pipe 322 enters the pickling pipe 311 through the dripping pipe 312. It can be understood that the end of the water washing pipe 321 and the liquid inlet end 3111 of the pickling pipe 311 located on the same side is connected to the water inlet pipe 322, so as to facilitate the connection of the dripping pipe 312 to the water washing pipe 321, reduce the length of the dripping pipe 312, and thus shorten the flow path of the washing liquid from the water inlet pipe 322 to the pickling pipe 311. That is, by setting a branch on the water inlet pipe 322, a part of the washing liquid in the water inlet pipe 322 is drained into the pickling pipe 311, so as to achieve the flushing of the pickling pipe 311. This arrangement does not require an additional liquid supply device to be provided for the dripping tube 312, and the liquid is directly drained from the water inlet pipe 322, so that the cleaning device 30 has a relatively simple structure and is easy to implement. Specifically, a liquid separation hole 3221 can be opened on the water inlet pipe 322, and the dripping tube 312 is connected through the liquid separation hole 3221. The aperture of the liquid separation hole 3221 matches the diameter of the dripping tube 312, that is, the aperture of the liquid separation hole 3221 is substantially the same as the diameter of the dripping tube 312, so that the dripping tube 312 is conveniently sealed and connected to the water inlet pipe 322 through the liquid separation hole 3221. Specifically, a waterproof glue can be used for further sealing to prevent leakage.

[0057] See also Figure 5 , Figure 53 is a schematic diagram of the structure of the cleaning device provided in the third embodiment of the present application. In this embodiment, the axial direction of the pickling pipe 311 is parallel to the axial direction of the cathode roller 20; the dripping pipe 312 is provided with a flow control member 3121 for controlling the flow rate and flow velocity of the water washing liquid in the dripping pipe 312, so that the water washing liquid flows along the bottom wall of the pickling pipe 311 at a preset flow rate and preset flow rate to the liquid outlet 3112 and then is discharged.

[0058] In this embodiment, a flow control member 3121 is provided on the drip tube 312 so that the water washing liquid has a preset flow rate, so that the water washing liquid can flow from the liquid inlet end 3111 of the pickling tube 311 along the bottom wall of the pickling tube 311 to the liquid outlet end 3112, so that the water washing liquid flows completely through the entire pickling tube 311, and the entire pickling tube 311 is flushed. At the same time, the flow rate and flow rate of the water washing liquid can be adjusted by the flow control member 3121, so that the pickling tube 311 can be flushed with a corresponding intensity according to the degree of crystallization in the pickling tube 311, thereby improving the flushing effect. Specifically, the flow control member 3121 may include a micro water pump, and the flow rate and flow rate of the water washing liquid in the drip tube 312 are controlled by the micro water pump to flush the pickling tube 311 with a corresponding intensity, thereby improving the flushing effect.

[0059] Furthermore, if Figure 2 As shown, in the above embodiment, the cleaning device 30 further includes a wiper 33, a water squeezing wheel 34 and a drying member 35. Specifically, along the rotation direction of the cathode roller 20, the pickling pipe 311 and the wiper 33 are arranged in sequence, or the wiper 33 is arranged above the pickling pipe 311 with the ground as the reference surface; and the wiper 33 is arranged obliquely, that is, the height of the wiper 33 gradually increases in the direction close to the cathode roller 20, so that the cleaning liquid on the cathode roller 20 can be drained. The wiper 33 includes a flexible scraper, for example, it can be made of rubber or cotton cloth to avoid scratching the surface of the copper foil due to direct contact between the wiper 33 and the copper foil; or, the flexible scraper can also be made of soft PVC material.

[0060] Specifically, the angle β between the wiper 33 and the tangent direction of the cathode roller 20 is 20° to 30°, so as to ensure the wiping effect of the wiper 33 on the copper foil and the drainage effect of the cleaning liquid by limiting the size of the angle β, and to avoid scratching the copper foil. It should be noted that the above-mentioned angle β refers to the smaller angle of the two angles formed between the wiper 33 and the tangent direction of the cathode roller 20.

[0061] Furthermore, a water storage box is also provided on the side of the wiper 33 away from the cathode roller 20, so that the water flow scraped by the wiper 33 flows into the water storage box under the tilting action of the wiper 33, thereby achieving the collection effect of the cleaning liquid. At the same time, baffles can be provided on both sides of the wiper 33 in the axial direction of the cathode roller 20. The baffles can prevent the cleaning liquid from flowing away from the sides of the wiper 33 during the flow on the wiper 33, thereby ensuring the collection effect of the cleaning liquid by the water storage box. In a specific application, a water storage box is provided on both sides of the axial direction of the cathode roller 20 of the wiper 33 to ensure the collection effect of the cleaning liquid on the wiper 33 by the water storage box. Similarly, three water storage boxes can be provided, two of which are located on both sides of the wiper 33 in the axial direction of the cathode roller 20, and the other is located on the side of the wiper 33 away from the cathode roller 20, and the water storage boxes are interconnected to improve the water storage capacity of the water storage box and ensure that the water storage box collects all the cleaning liquid of the wiper 33. Furthermore, the water storage box is connected to the outside through the water outlet, so that the cleaning liquid in the box can be discharged to the outside, to prevent the cleaning liquid from overflowing from the water storage box after filling the water storage box and causing it to flow into the electrolytic cell 10.

[0062] The water washing pipe 321 and the squeezing wheel 34 are sequentially arranged along the rotation direction of the cathode roller 20, and the squeezing wheel 34 abuts against the outer peripheral surface of the cathode roller 20. As the cathode roller 20 and the squeezing wheel 34 rotate synchronously, the squeezing wheel 34 can squeeze the cleaning liquid on the copper foil to facilitate the subsequent winding of the copper foil. The water squeezed out of the copper foil by the mutual squeezing between the squeezing wheel 34 and the cathode roller 20 will flow to the wiper 33 under the action of gravity and can be collected by the water storage box.

[0063] The drying member 35 is disposed on a side of the squeezing wheel 34 away from the wiper 33, and is used to dry the copper foil squeezed by the squeezing wheel 34, so as to dry the moisture on the surface of the copper foil, so that the copper foil can directly enter the subsequent winding work. In a specific embodiment, the drying member 35 may include a hot air blower, and the hot air blower blows hot air toward the copper foil in the corresponding area to achieve the drying work on the surface of the copper foil. Similarly, the drying room can also be a heating pipe, etc.

[0064] Furthermore, the cleaning device 30 may also include a dust cover 37 and a bracket 36. The dust cover 37 is fixedly mounted on the bracket 36 to cover the acid spray part 31 and the water spray part 32 to prevent the acid mist generated in the production of the copper foil from escaping. Specifically, the dust cover 37 may be made of transparent organic glass to facilitate observation of the copper foil production. An opening 371 is provided in the middle of the dust cover 37 for installing an exhaust pipe body to remove the acid mist generated in the production of the copper foil. Among them, the bracket 36 can be fixedly connected to the electrolytic cell 10, and the bracket 36 is used to install and fix the various components of the cleaning device 30; the bracket 36 can also be movably set on the electrolytic cell 10, and the interaction force between the water squeezing wheel 34, the wiper 33 and the cathode roller 20 can be changed by adjusting the position of the bracket 36 relative to the electrolytic cell 10, so as to facilitate adaptive adjustment according to copper foils of different thicknesses to ensure that the wiper 33 and the copper foil surface can achieve the scraping effect after contacting each other, and the copper foil will not be damaged, so as to improve the yield of copper foil preparation.

[0065] like Figure 1 As shown, the foil machine 100 further includes a winding roller 40, which is arranged on the side of the squeezing wheel 34 away from the wiper 33, that is, in the rotation direction of the cathode roller 20, the wiper 33, the squeezing wheel 34 and the winding roller 40 are arranged in sequence. The winding roller 40 is arranged to rotate and is used to peel the copper foil on the cathode roller 20 from the cathode roller 20 and collect it.

[0066] The above are only implementation methods of the present application, and are not intended to limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A cleaning device for a foil machine, the foil machine comprising an electrolytic cell and a cathode roller rotatably disposed in the electrolytic cell; the cleaning device comprising: An acid spraying member, including a pickling pipe, for spraying acid onto the copper foil on the cathode roller; It is characterized in that the acid spraying part also includes a dripping pipe, which is connected to the liquid inlet end of the pickling pipe and is used to introduce water washing liquid into the pickling pipe, and the water washing liquid flows from the liquid inlet end along the bottom wall of the pickling pipe to the liquid outlet end and is then discharged.

2. The cleaning device according to claim 1, characterized in that: There is a preset angle between the axis of the pickling tube and the axis of the cathode roller, and the preset angle is 10°~20°, and the height of the liquid inlet end of the pickling tube is higher than the height of the liquid outlet end; wherein the height of the liquid inlet end is the height from the liquid inlet end to a reference plane, the height of the liquid outlet end is the height from the liquid outlet end to a reference plane, and the reference plane is the horizontal plane where the liquid outlet end is located.

3. The cleaning device according to claim 1, characterized in that: The axis of the pickling pipe is parallel to the axis of the cathode roller; a flow control component is provided on the dripping pipe for controlling the flow rate and flow velocity of the water washing liquid in the dripping pipe so that the water washing liquid flows along the bottom wall of the pickling pipe at a preset flow rate and preset flow rate to be discharged from the liquid outlet; the flow control component includes a micro water pump.

4. The cleaning device according to claim 1, characterized in that: A water inlet hole is provided at the bottom wall of the liquid inlet end of the pickling pipe or at a position of the side wall of the liquid inlet end close to the bottom wall, the diameter of the water inlet hole matches the diameter of the dripping pipe, and the dripping pipe is sealed and connected with the pickling pipe through the water inlet hole; A drainage hole is provided at the bottom wall of the liquid outlet end of the pickling pipe or at a position of the side wall of the liquid outlet end close to the bottom wall, so that the water washing liquid can be discharged through the drainage hole.

5. The cleaning device according to claim 4, characterized in that: The acid spraying member further comprises a drain pipe, which is sealed and connected with the pickling pipe through the drain hole, so that the water washing liquid can be discharged through the drain pipe.

6. The cleaning device according to claim 1, characterized in that: The cleaning device also includes a water spraying member, and the water spraying member includes a water washing pipe and a water inlet pipe; The water washing pipe is used to spray water to the copper foil on the cathode roller, and the pickling pipe and the water washing pipe are arranged in sequence along the rotation direction of the cathode roller; One end of the water washing pipe close to the dripping pipe is connected to the water inlet pipe, and the water inlet pipe is used to introduce water washing liquid into the water washing pipe; The dripping pipe is connected to the water inlet pipe, so that the washing liquid in the water inlet pipe enters the pickling pipe through the dripping pipe.

7. The cleaning device according to claim 6, characterized in that: The water inlet pipe is provided with a liquid separation hole, the diameter of which matches the diameter of the dripping pipe, and the dripping pipe is sealed and connected with the water inlet pipe through the liquid separation hole.

8. The cleaning device according to claim 1, characterized in that: The acid spraying part also includes a liquid inlet pipe and a liquid discharge pipe; The liquid inlet pipe is connected to the liquid inlet end of the pickling pipe and is used to introduce acid into the pickling pipe; The drain pipe is connected to the liquid outlet end of the pickling pipe, and a valve is provided on the drain pipe; when the pickling pipe sprays acid to the copper foil on the cathode roller, the valve is closed; after the pickling pipe stops spraying acid to the copper foil on the cathode roller, the valve is opened to allow the accumulated liquid in the pickling pipe to be discharged through the drain pipe; The other end of the drain pipe leads to the electrolytic cell.

9. The cleaning device according to any one of claims 1 to 8, characterized in that: The diameter of the pickling pipe is 35-45 mm, and the pickling flow rate in the pickling pipe is 15-35 m 3 / h, the spray angle of the pickling pipe is 45°~60°; The diameter of the dropper is 3-5 mm, and the water washing flow rate in the dropper is 0.72-1.8 L / h.

10. The cleaning device according to claim 6 or 7, characterized in that: The diameter of the water washing pipe is 35-45 mm, and the water washing flow rate in the water washing pipe is 15-35 m 3 / h, and the spray angle of the water washing pipe is 40°~50°.

11. A foil production machine, characterized in that: include: Electrolyzer; A cathode roller, rotatably disposed in the electrolytic cell; The cleaning device is the cleaning device as described in any one of claims 1 to 10.

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