Aluminum oxide film electrolytic coloring device

Abstract

The utility model relates to the technical field of electrolysis equipment, in particular to an aluminum oxide film electrolytic coloring device which comprises an electrolytic bath, a heat exchange coil and a circulation assembly, the heat exchange coil is arranged on the inner side wall of the electrolytic bath in a surrounding mode, and the face, away from the inner side wall of the electrolytic bath, of the heat exchange coil is a concave arc face. The circulating assembly comprises a plurality of discharging nozzles, a circulating pump and a liquid inlet pipe, the bottom of the electrolytic bath communicates with a liquid inlet of the circulating pump through the liquid inlet pipe, a liquid outlet of the circulating pump communicates with the discharging nozzles through pipelines, and the discharging nozzles are arranged at equal intervals in the extending direction of the heat exchange coil; and the discharging nozzle is arranged below the concave arc surface and faces the concave arc surface. According to the electrolytic coloring device for the aluminum oxide film, the cooling function and the electrolysis function are effectively combined, and the electrolytic coloring effect and efficiency of the aluminum oxide film are improved by optimizing flowing and heat exchange.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolysis equipment, in particular to an electrolytic coloring device for aluminum oxide films. Background Art

[0002] The electrolytic coloring device for aluminum materials is a device specifically used for electrolytic coloring treatment of aluminum materials. Electrolytic coloring is a process of forming a colored oxide film on the surface of aluminum materials through chemical reactions, and is commonly used for the decoration and protection of aluminum alloy products.

[0003] In order to ensure the uniformity of electrolytic coloring, it is usually necessary to use a circulation device to circulate the electrolyte in the electrolytic cell to promote the uniform dispersion of metal ions in the electrolyte. However, in the prior art, the circulation effect of the circulation device is relatively poor, and there are often circulation dead angles and circulation vortices of the electrolyte, resulting in uneven dispersion of metal ions and ultimately uneven electrolytic coloring. In view of this, how to improve the uniform circulation and dispersion of the electrolyte in the electrolytic coloring device has become one of the technical problems to be solved urgently at present. Summary of the Utility Model

[0004] In view of this, the utility model provides an electrolytic coloring device for aluminum oxide films with a more reasonable structural design, aiming to improve the uniform dispersion effect of the electrolyte.

[0005] The technical solution of the utility model is realized as follows: The utility model provides an electrolytic coloring device for aluminum oxide films, including: an electrolytic cell, a heat exchange coil, and a circulation assembly. The heat exchange coil is arranged around the inner side wall of the electrolytic cell, and the side of the heat exchange coil away from the inner side wall of the electrolytic cell is a concave arc surface. The circulation assembly includes a plurality of discharge nozzles, a circulation pump, and a liquid inlet pipe. The bottom of the electrolytic cell is connected to the inlet of the circulation pump through the liquid inlet pipe, the outlet of the circulation pump is connected to a plurality of discharge nozzles through a pipeline, the plurality of discharge nozzles are arranged at equal intervals along the extension direction of the heat exchange coil, the discharge nozzles are arranged below the concave arc surface and the discharge nozzles are arranged facing the concave arc surface.

[0006] In some embodiments, the tangent plane of the upper side edge of the concave arc surface is parallel to the horizontal plane.

[0007] In some embodiments, the liquid discharge direction of the discharge nozzle is parallel to the tangent plane of the lower side edge of the concave arc surface at the position it faces.

[0008] In some embodiments, it further includes a feeding device, and the discharging end of the feeding device is connected to the inlet of the circulation pump.

[0009] In some embodiments, it further includes a power supply. The power supply is arranged outside the electrolytic cell, the anode of the power supply is electrically connected to the workpiece, the workpiece is arranged inside the electrolytic cell, the cathode of the power supply is electrically connected to the heat exchange coil, and the heat exchange coil is made of metal material.

[0010] In some embodiments, it further includes an insulating partition, which is fixed on the inner side wall of the electrolytic cell, and the heat exchange coil is fixed on the surface of the insulating partition.

[0011] In some embodiments, the electrolytic cell is a cubic cell, and the length direction of the heat exchange coil on the corresponding inner wall of the electrolytic cell is parallel to the corresponding inner wall of the electrolytic cell.

[0012] The utility model has the following beneficial effects compared with the prior art:

[0013] By arranging a heat exchange coil in the electrolytic cell and improving the surface morphology of the heat exchange coil, a concave arc surface is set, and in cooperation with the discharge nozzle of the circulating electrolyte, the sprayed electrolyte turns and reflects after passing through the concave arc surface, achieving more local eddy current circulation, so that the distribution of metal ions in the electrolyte on the surface of the workpiece is more uniform, and the electrolyte after passing through the concave arc surface has a more appropriate temperature, which is beneficial to the precise control of electrolysis conditions and improves the consistency of electrolytic coloring. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a cross-sectional view of the electrolytic coloring device for aluminum oxide film of the present utility model.

[0016] In the figure: 1 - electrolytic cell, 2 - heat exchange coil, 3 - circulation component, 4 - feeding device, 5 - power supply, 6 - workpiece, 7 - insulating partition, 21 - concave arc surface, 31 - discharge nozzle, 32 - circulation pump, 33 - liquid inlet pipe. Specific Embodiments

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0018] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0019] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0020] In the prior art, since the metal ions present in the electrolyte are not easily diffused and the diffusion rate is relatively slow, and there are circulation dead corners in the conventional stirring and circulation method of the electrolyte, the circulation effect is insufficient. As a result, the concentration of metal ions in the electrolyte at different positions on the surface of the workpiece 6 is inconsistent, and finally the coloring effect on the surface of the workpiece 6 is different. One of the methods to improve the above problems is to improve the circulation method of the electrolyte.

[0021] As Figure 1 shown, the aluminum oxide film electrolytic coloring device of the present utility model includes: an electrolytic cell 1, a heat exchange coil 2, and a circulation assembly 3. The heat exchange coil 2 is disposed around the inner sidewall of the electrolytic cell 1. The surface of the heat exchange coil 2 away from the electrolytic cell 1 is a concave arc surface 21. The circulation assembly 3 includes a plurality of discharge nozzles 31, a circulation pump 32, and a liquid inlet pipe 33. The bottom of the electrolytic cell 1 is communicated with the liquid inlet of the circulation pump 32 through the liquid inlet pipe 33. The liquid outlet of the circulation pump 32 is communicated with the plurality of discharge nozzles 31 through a pipeline. The plurality of discharge nozzles 31 are arranged at equal intervals along the extending direction of the heat exchange coil 2. The discharge nozzles 31 are disposed below the concave arc surface 21 and the discharge nozzles 31 are arranged facing the concave arc surface 21.

[0022] The improvement scheme proposed in the above embodiments is that the circulation pump 32 is used to circulate and transport the electrolyte in the electrolytic cell 1, and the plurality of discharge nozzles 31 are used to transport the electrolyte at different positions. The liquid jet generated during the transportation will promote the circulation. At the same time, in order to make the circulation effect better and reduce the circulation dead corners, a concave arc surface 21 is also machined on the surface of the pipeline of the heat exchange coil for heat exchange purposes. As Figure 1As shown, the concave arc surface 21 is arranged along one side surface of the heat exchange coil 2. The circulating electrolyte ejected from the discharge nozzle 31 forms a local circulating eddy current after rebounding from the concave arc surface 21. Since the heat exchange coil 2 is arranged in a surrounding manner, this circulating eddy current will also form a surrounding eddy current field, and finally form an electrolyte circulation from the periphery to the center, overcoming the dead angle problem to the greatest extent. Preferably, the liquid inlet pipe 33 is communicated with the center of the bottom of the electrolytic cell 1, so that the eddy current field will finally flow below the workpiece 6, enabling effective circulation of all parts of the surface of the workpiece 6. Moreover, after passing through the concave arc surface 21, the electrolyte jet will be heated or cooled with high efficiency, improving the heat exchange efficiency.

[0023] In some embodiments, the tangent plane of the upper side edge of the concave arc surface 21 is parallel to the horizontal plane.

[0024] In the above embodiments, when the tangent plane at the upper side edge of the concave arc surface 21 is horizontal, the ejected electrolyte jet can circulate in the horizontal direction. Due to the circulating action of the liquid inlet pipe 33, the electrolyte at the center will have a downward flowing tendency. Combining with the circulating jet in the horizontal direction, the electrolyte can achieve an all-round circulating effect on the surface of the workpiece 6.

[0025] In some embodiments, the liquid outlet direction of the discharge nozzle 31 is parallel to the tangent plane of the lower side edge of the concave arc surface 21 at the position it faces.

[0026] In the above embodiments, in order to enable the circulating electrolyte jet ejected from the discharge nozzle 31 to be stably guided after entering the concave arc surface 21 and reduce the reduction of the jet kinetic energy, the liquid outlet direction of the discharge nozzle 31 is parallel to the tangent plane of the lower side edge of the concave arc surface 21. Preferably, the liquid outlet direction of the discharge nozzle 31 coincides with the tangent plane of the lower side edge of the concave arc surface 21.

[0027] In some embodiments, a feeding device 4 is further included, and the discharge end of the feeding device 4 is communicated with the liquid inlet of the circulating pump 32.

[0028] In the above embodiments, since metal ions will be consumed during the coloring process of the electrolyte, it is necessary to supplement the metal ion raw materials regularly or irregularly. By adding them to the electrolyte circulation system, not only can it promote their circulation and mixing with the electrolyte jet, but also the supplement method is simple. Therefore, the discharge end of the feeding device 4 is communicated with the liquid inlet of the circulating pump 32, which can realize the supplement of metal ions. Specifically, the feeding device 4 can be a storage tank with a conveying pump, and a valve is arranged at the discharge end to control the opening and closing of the discharge end.

[0029] In some embodiments, it further includes a power supply 5. The power supply 5 is arranged outside the electrolytic cell 1. The anode of the power supply 5 is electrically connected to the workpiece 6. The workpiece 6 is arranged inside the electrolytic cell 1. The cathode of the power supply 5 is electrically connected to the heat exchange coil 2. The heat exchange coil 2 is made of metal material.

[0030] In the above embodiments, as a preferred implementation manner, the anode is electrically connected to the workpiece 6, and the cathode is electrically connected to the heat exchange coil 2. At this time, the structural space can be effectively utilized, and at the same time, the cooling of the electrolyte and the electrolysis reaction can be realized, improving the overall efficiency of the device.

[0031] In some embodiments, it further includes an insulating partition 7. The insulating partition 7 is fixed on the inner side wall of the electrolytic cell 1. The heat exchange coil 2 is fixed on the surface of the insulating partition 7.

[0032] In the above embodiments, the insulating partition 7 can prevent the direct contact between the electrolytic cell 1 and the heat exchange coil 2, improving the safety and efficiency of the system.

[0033] In some embodiments, the electrolytic cell 1 is a cubic cell. The length direction of the heat exchange coil 2 on the corresponding inner wall of the electrolytic cell 1 is parallel to the corresponding inner wall of the electrolytic cell 1.

[0034] In the above embodiments, the morphological design of the cubic cell helps to provide a stable structure and sufficient reaction space, meeting the requirements of large-scale production.

[0035] The specific working process of the aluminum oxide film electrolytic coloring device provided by this application includes: turning on the power supply and the circulation pump to ensure that the electrolyte circulates in the electrolytic cell, adjusting the direction and flow rate of the discharge nozzle to ensure that the electrolyte is evenly sprayed onto the concave arc surface of the heat exchange coil, and timely supplementing the electrolyte or additives through the feeding device to maintain the optimal reaction conditions.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electrolytic coloring device for an aluminum oxide film, characterized in that, Including: An electrolytic cell (1), a heat exchange coil (2) and a circulation assembly (3). The heat exchange coil (2) is arranged around the inner side wall of the electrolytic cell (1). The side of the heat exchange coil (2) away from the inner side wall of the electrolytic cell (1) is a concave arc surface (21). The circulation assembly (3) includes a plurality of discharge nozzles (31), a circulation pump (32) and a liquid inlet pipe (33). The bottom of the electrolytic cell (1) is communicated with the liquid inlet of the circulation pump (32) through the liquid inlet pipe (33). The liquid outlet of the circulation pump (32) is communicated with the plurality of discharge nozzles (31) through a pipeline. The plurality of discharge nozzles (31) are arranged at equal intervals along the extending direction of the heat exchange coil (2). The discharge nozzles (31) are arranged below the concave arc surface (21) and the discharge nozzles (31) are arranged facing the concave arc surface (21).

2. The electrolytic coloring device for aluminum oxide film according to claim 1, characterized in that, The tangent plane of the upper side edge of the concave arc surface (21) is parallel to the horizontal plane.

3. The electrolytic coloring device for an aluminum oxide film according to claim 2, characterized in that, The liquid discharge direction of the discharge nozzle (31) is parallel to the tangent plane of the lower side edge of the concave arc surface (21) at the position it faces.

4. The electrolytic coloring device for aluminum oxide film according to claim 1, characterized in that It further includes a feeding device (4). The discharging end of the feeding device (4) is communicated with the liquid inlet of the circulation pump (32).

5. The electrolytic coloring device for anodic aluminum oxide film according to claim 1, characterized in that, It further includes a power supply (5). The power supply (5) is arranged outside the electrolytic cell (1). The anode of the power supply (5) is electrically connected to the workpiece (6). The workpiece (6) is arranged inside the electrolytic cell (1). The cathode of the power supply (5) is electrically connected to the heat exchange coil (2). The heat exchange coil (2) is made of metal.

6. The electrolytic coloring device for anodic aluminum oxide film according to claim 1, characterized in that, It further includes an insulating partition (7). The insulating partition (7) is fixed on the inner side wall of the electrolytic cell (1). The heat exchange coil (2) is fixed on the surface of the insulating partition (7).

7. The electrolytic coloring device for anodic aluminum oxide film according to claim 1, characterized in that, The electrolytic cell (1) is a cubic cell. The length direction of the heat exchange coil (2) on the corresponding inner wall of the electrolytic cell (1) is parallel to the corresponding inner wall of the electrolytic cell (1).

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