Micro-arc oxidation reaction tank

Abstract

A micro-arc oxidation reaction tank comprises a reaction tank main body and electrolyte, the electrolyte is contained in the reaction tank main body, an anode and a cathode are respectively arranged in the reaction tank main body, and the micro-arc oxidation reaction tank is characterized in that the reaction tank main body is divided into three areas from the cross section, the three areas are respectively a cathode area, an anode area and a cathode area, and transition areas are arranged among different areas. And a liquid level meter is fixed on the outer wall of the reaction tank main body, so that separation and collection of gases generated by a cathode and an anode in a micro-arc oxidation reaction process are realized, and the electric energy utilization efficiency of a micro-arc oxidation technology is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-arc oxidation surface treatment, in particular to a micro-arc oxidation reaction tank. Background Art

[0002] Micro-arc oxidation technology is a surface treatment technology that uses plasma arc discharge to sinter electrolyte materials on the surface of metal substrates such as aluminum, magnesium, and titanium in an electrolyte solution, and then grows a ceramic layer in situ on the surface of light metals. This technology uses the instantaneous high temperature of arc discharge in the micro-arc area to oxidize the surface of metals (aluminum, magnesium, titanium, etc.) into metal oxide ceramics, thereby improving the surface properties of the metal, such as corrosion resistance and surface hardness. This technology has the characteristics of green environmental protection, simple process, and excellent coating performance.

[0003] The micro-arc oxidation process includes plasma chemistry, electrochemical oxidation, water electrolysis and other reaction processes. By increasing the voltage between the anode and the cathode, a thick layer of oxide is generated on the surface of the alloy, which is then broken down and fused again by plasma extrusion at a higher voltage to form a complex metal oxide ceramic film. In this process, a large amount of hydrogen and oxygen will be generated on the surface of the cathode and anode workpieces immersed in the electrolyte. Usually, the oxidation reaction tank is an open container, and the generated hydrogen and oxygen are directly discharged by the ventilation system because they are difficult to collect, resulting in energy consumption and waste. Therefore, it is necessary to provide a micro-arc oxidation reaction tank to solve the problem of difficult collection of hydrogen and oxygen, so as to improve the utilization efficiency of electrical energy in the micro-arc oxidation process.

[0004] Upon investigation, the patent number CN202221417087.9 discloses an energy-saving double-target oxidation tank suitable for micro-arc oxidation process. The interior of the tank body in the double-target oxidation tank has a cavity for containing electrolyte. The anode assembly spans above the cavity. A support for supporting the end of the anode assembly is provided on the edge of the side wall of the tank body. The fixed end of the clamp is connected to the anode assembly. The pressure head of the clamp and the side wall of the anode assembly form a fast and firm clamp on the workpiece. The output end of the drive device in the mobile cathode assembly is connected to the transmission rod and drives the transmission rod to rotate. The drive device in the mobile cathode assembly drives the transmission rod to rotate forward or reverse. The distance between the cathode plate and the anode workpiece product changes at different stages of the micro-arc oxidation reaction, which improves the uniformity and density of the oxidation coating on the surface of the product, reduces the overall energy consumption, and realizes the large-scale industrial production and application of the micro-arc oxidation process. However, a drive device is required, which is easily damaged under long-term work and has a complex structure. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a micro-arc oxidation reaction tank to realize the separation and collection of gases generated by the anode and cathode in the micro-arc oxidation reaction process, thereby improving the power utilization efficiency of the micro-arc oxidation technology.

[0006] The technical solution of the utility model is: a micro-arc oxidation reaction tank, comprising a reaction tank body and an electrolyte, wherein the reaction tank body contains the electrolyte, and an anode and a cathode are respectively arranged in the reaction tank body. The utility model is characterized in that the reaction tank body is divided into three areas from the perspective of a cross section, namely, a cathode area, an anode area, and a cathode area, and transition areas are arranged between different areas, and a liquid level meter is fixed on the outer wall of the reaction tank body.

[0007] Further improvement: The two sides of the transition zone are separated by partitions for isolating the cathode zone and the anode zone, the upper part of the partition is a solid water-proof and air-proof structure, and the lower part is a hollow mesh structure.

[0008] Further improvement: hydrophilic filtration membranes are arranged on both sides of the hollow mesh structure, and the hydrophilic filtration membranes are hydrophilic ultrafiltration membranes or hydrophilic microfiltration membranes.

[0009] Further improvement: a sealing gasket is fixed on the top of the cathode region and the anode region, a cover plate is fixed on the top of the sealing gasket, and the cover plate is fixed to the reaction tank body by screws.

[0010] Further improvement: a circular hole is provided on the top of the cover plate, and the rod-shaped anode and the rod-shaped cathode pass through the circular hole and are fixed between the anode area and the cathode area.

[0011] Further improvement: A hydrogen collecting port and an oxygen collecting port are respectively provided at the upper part of the cathode region and the anode region, and an electrolyte circulation inlet is respectively provided at the lower part of the cathode region and the anode region.

[0012] Further improvement: the rod-shaped anode and the rod-shaped cathode are connected to an external anode power supply and cathode power supply respectively.

[0013] Further improvement: the upper end and the lower end of the liquid level meter are respectively provided with an upper interface and a lower interface connected to the reaction tank body, and a hydrophilic film height marking line is provided in the middle of the liquid level meter.

[0014] Finally: The main body of the reaction tank is a cylinder.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model has a simple and reliable structure. The anode and cathode reaction areas are separated by a hydrophilic membrane, which is beneficial to the separation and collection of different gases. It also does not affect the ion transfer in the electrolyte and has little effect on the oxidation reaction.

[0017] 2. The utility model sets an open transition zone between the sealed anode zone and cathode zone. The bottoms of the three zones are interconnected, so that the gas generated in the sealed reaction zone can be stored separately while ensuring that the pressure of the gas inside the reaction zone is not too high. An electrolyte circulation inlet is set above the transition zone. During normal operation, the liquid level in the transition zone will be higher than that in the cathode zone and the anode zone, that is, the liquid pressure in the transition zone is greater than that in the reaction zones on both sides, which is beneficial to the discharge of gas inside the reaction zones on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the utility model.

[0019] Figure 2 is the cross-sectional view of the partition,

[0020] Figure 3 is a schematic diagram of the structure of the partition.

[0021] In the figure, 1, the main body of the reaction tank, 2, the electrolyte, 3, the cathode area, 4, the anode area, 5, the transition area, 6, the liquid level meter, 7, the partition, 8, the hollow mesh structure, 9, the hydrophilic filter membrane, 10, the sealing gasket, 11, the cover plate, 12, the screw, 13, the electrolyte circulation outlet, 14, the round hole, 15, the rod-shaped anode, 16, the rod-shaped cathode, 17, the hydrogen collection port, 18, the oxygen collection port, 19, the electrolyte circulation inlet, 20, the upper interface, 21, the lower interface, 22, the hydrophilic membrane height mark line. 23, the workpiece to be processed. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation methods of the utility model patent in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model patent, but cannot be used to limit the scope of the utility model patent. In the description of the utility model patent, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model patent 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 cannot be understood as a limitation on the utility model patent. In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] according to Figures 1 to 3 A micro-arc oxidation reaction tank comprises a reaction tank body 1 and an electrolyte 2. The reaction tank body 1 contains the electrolyte 2. An anode and a cathode are respectively arranged in the reaction tank body 1. The improvement lies in that the reaction tank body 1 is divided into three areas from a cross-section, namely a cathode area 3, an anode area 4, and a cathode area 3. A transition area 5 is arranged between different areas. A liquid level meter 6 is fixed on the outer wall of the reaction tank body 1. The reaction tank body 1 is a cylinder.

[0026] The two sides of the transition zone 5 are separated from the cathode zone 3 and the anode zone 4 by partitions 7. The upper part of the partition 7 is a solid water-impermeable and air-impermeable structure, and the lower part is a hollow mesh structure 8. Hydrophilic filter membranes 9 are arranged on both sides of the hollow mesh structure 8. The hydrophilic filter membranes 9 are hydrophilic ultrafiltration membranes or hydrophilic microfiltration membranes to achieve liquid level balance. The height of the hydrophilic filter membrane 9 at the lower end of the partition 7 is 1 / 3 to 1 / 2 of the height of the partition 7.

[0027] A sealing gasket 10 is fixed on the top of the cathode region 3 and the anode region 4, and a cover plate 11 is fixed on the top of the sealing gasket 10, and the cover plate is fixed to the reaction tank body 1 by screws 12. A circular hole 14 is provided on the top of the cover plate 11, and a rod-shaped anode 15 and a rod-shaped cathode 16 are fixed between the anode region 4 and the cathode region 3 through the circular hole 14. The rod-shaped anode 15 is made of titanium alloy or aluminum alloy, and the surface is insulated; the rod-shaped cathode 16 is made of stainless steel. A hydrogen collection port 17 and an oxygen collection port 18 are respectively provided on the upper part of the cathode region 3 and the anode region 4, and an electrolyte circulation inlet 19 and an electrolyte circulation outlet 13 are respectively provided on the upper and lower parts of the cathode region 3 and the anode region 4. The rod-shaped anode 15 and the rod-shaped cathode 16 are respectively connected to an external anode power supply and a cathode power supply.

[0028] The upper end and lower end of the liquid level meter 6 are respectively provided with an upper interface 20 and a lower interface 21 connected to the reaction tank body 1, so that the liquid level meter 6 and the water level in the reaction tank body 1 are the same, and a hydrophilic membrane height mark line 22 is provided in the middle of the liquid level meter 6 to facilitate the user to observe and understand the page status. When working, the initial liquid level height of the electrolyte 2 is higher than the mark position of the liquid level meter 6.

[0029] The reaction tank body 1, the partition plate 7, the cover plate 11, and the sealing gasket 10 are all made of insulating materials.

[0030] When the user uses this product to work, first connect the upper and lower ends of the liquid level meter 6 to the upper interface 20 and the lower interface 21 of the reaction tank body 1, put the partition 7 into the reaction tank body 1, place the sealing gasket 10 on the upper end surface of the reaction tank body 1, pass the upper end of the rod-shaped anode 15 through the cover plate 11, and use a sealant to seal the contact part, connect the part of the rod-shaped anode 15 passing through the cover plate 11 to the positive electrode of the oxidation power supply, fix the workpiece 23 to be processed on the lower end of the rod-shaped anode 15, pass the upper end of the rod-shaped cathode 16 through the cover plate 11, and use a sealant to seal the contact part, and pass the rod-shaped cathode 16 through the cover plate 11. The cathode of the oxidation power supply is connected, the cover plate 11 is placed on the top of the cathode zone 3 and the anode zone 4, and fixed with screws 12; then the electrolyte circulation inlet 19 is connected to the electrolyte circulation outlet 13, the electrolyte circulation outlet 13 of the cathode zone 3 and the electrolyte circulation outlet 13 of the anode zone 4 are connected to the electrolyte circulation inlet 19, the hydrogen collecting port 17 is connected to the hydrogen collector, the oxygen collecting port 18 is connected to the oxygen collector, and the electrolyte is added from the upper opening area of ​​the transition zone 5 to the interior of the reaction tank body 1 until the liquid level in the liquid level meter is higher than the hydrophilic membrane height mark line 22; finally, the power is turned on to start the oxidation treatment.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A micro-arc oxidation reaction tank, comprising a reaction tank body and an electrolyte, wherein the reaction tank body contains the electrolyte, and the reaction tank body is provided with an anode and a cathode, wherein the reaction tank body is provided with an electrolyte, and the electrolyte is contained in the reaction tank body. The reaction tank body is divided into three areas from the cross section, namely the cathode area, the anode area and the cathode area. A transition area is provided between different areas. A liquid level meter is fixed on the outer wall of the reaction tank body.

2. A micro-arc oxidation reaction tank according to claim 1, characterized in that The two sides of the transition zone are separated from the cathode zone and the anode zone by partitions, the upper part of the partition is a solid water-proof and air-proof structure, and the lower part is a hollow mesh structure.

3. A micro-arc oxidation reaction tank according to claim 2, characterized in that Hydrophilic filtration membranes are arranged on both sides of the hollow mesh structure, and the hydrophilic filtration membranes are hydrophilic ultrafiltration membranes or hydrophilic microfiltration membranes.

4. A micro-arc oxidation reaction tank according to claim 1, characterized in that A sealing gasket is fixed on the top of the cathode region and the anode region, a cover plate is fixed on the top of the sealing gasket, and the cover plate is fixed to the reaction tank body by screws.

5. A micro-arc oxidation reaction tank according to claim 4, characterized in that A circular hole is arranged on the top of the cover plate, and a rod-shaped anode and a rod-shaped cathode pass through the circular hole and are fixed between the anode area and the cathode area.

6. A micro-arc oxidation reaction tank according to claim 5, characterized in that A hydrogen collecting port and an oxygen collecting port are respectively arranged at the upper part of the cathode region and the anode region, and an electrolyte circulation inlet is respectively arranged at the lower part of the cathode region and the anode region.

7. A micro-arc oxidation reaction tank according to claim 5, characterized in that The rod-shaped anode and the rod-shaped cathode are connected to an external anode power supply and a cathode power supply respectively.

8. A micro-arc oxidation reaction tank according to claim 1, characterized in that The upper end and the lower end of the liquid level meter are respectively provided with an upper interface and a lower interface connected with the reaction tank body, and a hydrophilic film height marking line is arranged in the middle of the liquid level meter.

9. A micro-arc oxidation reaction tank according to claim 1, characterized in that The reaction tank body is a cylinder.

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