Rotary electroplating and electrolysis contact device

Abstract

The utility model discloses a rotary electroplating and electrolysis contact device, which relates to the technical field of electrochemistry and comprises an electrolysis and electroplating bath and a stirring structure, a stirring paddle of the stirring structure is made of insulating materials and is fixedly mounted at the bottom end of a stirring shaft made of conductor materials, and the stirring shaft is electrically communicated with an electrode of a power supply. The stirring arm is positioned above the stirring paddle and is made of a conductor material; the stirring arms are rotatably mounted on the stirring shaft, and are coaxially arranged in multiple layers and circumferentially and uniformly distributed to form rod-shaped structures which extend outwards in the radial direction. The stirring arm arranged above the stirring paddle is electrified, the stirring paddle is made of an inert insulating material and does not participate in electrochemical reaction, the fluidity of electroplating / electrolyte is kept through stirring action, the powder material is uniformly distributed in the solution, the electrochemical reaction efficiency and the reaction uniformity are effectively improved, and meanwhile, the uniformity of the powder material is improved. And self corrosion or material deposition is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemistry, in particular to an electroplating device or an electrolytic impurity removal device for powder materials. Background Art

[0002] In the preparation and application of powder materials, the performance of functional materials such as conductive coatings, thermal conductive materials, electromagnetic shielding materials, absorbing materials, porous materials and gradient materials depends greatly on their structure and properties. The aforementioned powder materials usually need to be coated with metal on the surface, i.e. electroplating, to improve their surface characteristics and functional performance, including improving conductivity, enhancing mechanical strength and improving surface finish and gloss. At the same time, the aforementioned powder materials also need to be refined by electrolytic purification technology to improve the purity of the material.

[0003] During the electroplating process, the uneven distribution of powder materials in the electrolyte often directly manifests itself as uneven thickness of the electroplating layer, and the uniformity of the coating directly affects the performance and interface of the powder. During the electrolysis process, the uneven distribution of powder materials in the electrolyte will affect the overall purification efficiency. In order to promote the uniform flow of the electroplating / electrolyte, ensure the uniformity of the current density in the electroplating / electrolyte, and increase the speed of the electrochemical reaction in the electroplating / electrolyte, the electroplating or electrolysis equipment is usually equipped with a stirrer, and the design and function of the stirrer also directly affect the efficiency and quality of the electroplating or electrolysis process.

[0004] Through prior art search, there are the following known technical solutions:

[0005] Prior art 1: A stirring device for a reactor

[0006] Application number: 201821171839.1, application date: 2018.07.23, publication (announcement) date: 2019.03.01.

[0007] Prior art 1 relates to the field of electroplating technology, and specifically to a stirring device for a reactor. The device is equipped with a partition, a reaction chamber, a mounting chamber, a rotating shaft, a driving motor and a rotating sleeve, wherein a stirring paddle is fixed on the rotating sleeve. The sleeve is movably arranged on the partition through a bearing, and is sleeved on the rotating shaft, so that the stirring paddle can be efficiently rotated and stirred under the drive of the rotating sleeve. Driven by the driving motor, the active bevel gear drives the second driven gear on the rotating sleeve to rotate. Because the second driven gear is directly connected to the stirring paddle, this transmission mechanism directly affects the rotation direction and speed of the stirring paddle. In addition, the meshing design of the first driven gear and the second driven gear allows the stirring paddle on the rotating sleeve to achieve reverse rotation. This forward and reverse stirring action greatly improves the mixing efficiency of the material and effectively avoids the dead corner of the material in the reactor. The reverse stirring ability of the stirring paddle ensures that the material is fully stirred in different directions, which is crucial to the uniformity and efficiency of the chemical reaction, especially in the production process of accurately controlling the chemical reaction conditions. The design of the stirring paddle also takes into special consideration the proximity to the inner wall of the reactor, and is combined with an elastic telescopic rod and a scraper system, which can not only stir the liquid, but also assist the scraper in clearing the wall material, ensuring that no unreacted material remains on the reactor wall.

[0008] In the prior art 1, although the stirring device of the reactor provides a series of innovative designs, it contains multiple gears and mechanical transmission components (such as driving bevel gears, driven gears, rotating sleeves, etc.), which increases the risk of mechanical failure, especially when subjected to high loads or long-term operation. The complexity of these mechanical components may lead to maintenance difficulties and increase operation and maintenance costs.

[0009] Prior art 2: an electroplating tank with stirring

[0010] Application number: 201510936322.1, application date: 2015.12.16, publication (announcement) date: 2016.04.06.

[0011] Prior art 2 discloses an electroplating tank with stirring, which relates to the field of electroplating, and specifically includes an electroplating tank body, a stirring shaft, a stirring paddle, a first cleaning scraper, a second cleaning scraper and a cover. The electroplating tank body is the main container for containing the plating solution and is made of PPR material to ensure its corrosion resistance and temperature resistance. The stirring shaft is arranged at the bottom of the electroplating tank body, and as the core component of the entire stirring system, it is responsible for transmitting the driving force to rotate the stirring paddle. The stirring paddle is installed at the top of the stirring shaft, and adopts a two-blade design, which can effectively stir the plating solution in the electroplating tank, maintain the dynamic uniformity of the liquid, and thus improve the uniformity and quality of the coating. The cleaning scraper, including the first cleaning scraper and the second cleaning scraper, is installed on both sides of the lower part of the stirring paddle to help remove the sediment around the tank wall and the stirring paddle during the stirring process, maintain the cleanliness of the plating solution, and further optimize the electroplating quality. The cover is arranged above the electroplating tank body to help prevent the contamination of the plating solution and reduce the emission of harmful gases, providing a safer working environment for operators.

[0012] However, in the prior art 2, the scraper is designed to clean the inner wall of the electroplating tank near the stirring paddle, and its effect is highly dependent on the contact quality between the scraper and the tank wall. If the scraper fails to closely contact the tank wall due to improper installation or wear, its cleaning effect will be greatly reduced. This dependence means that in actual applications, maintaining the effectiveness of the scraper may require frequent maintenance and adjustment, thereby increasing the complexity of operation and maintenance costs.

[0013] Through the above search, it is found that the above technical solutions do not affect the novelty of the utility model; and the mutual combination of the above prior arts does not destroy the creativity of the utility model. Utility Model Content

[0014] The utility model is to avoid the deficiencies of the prior art and provides a rotary electroplating and electrolysis contact device.

[0015] The utility model adopts the following technical solution to solve the technical problem: a rotary electroplating and electrolysis contact device, comprising an electrolysis and electroplating tank with an opening at the top and a stirring structure with an action end extending into the bottom of the electrolysis and electroplating tank, wherein the stirring structure comprises a stirring shaft, a stirring arm and a stirring paddle;

[0016] The stirring paddle is made of insulating material.

[0017] As the active end of the stirring structure, it is fixed to the bottom end of the stirring shaft made of a conductive material; the stirring shaft is connected to a driving machine that drives it to rotate around its own axis, and the stirring shaft is electrically connected to the electrode of the power supply;

[0018] The stirring arm is located above the stirring paddle and is made of a conductive material. The stirring arm is coaxial and has multiple layers of radially outward-extending rod-like structures that are evenly distributed circumferentially. The stirring arm is rotatably mounted on the stirring shaft, and a rotating pair is formed therebetween with the axis of the stirring shaft as the rotating axis.

[0019] Further, it also includes an electromagnet;

[0020] The electromagnet is disposed outside the electrolysis and electroplating tank at a position corresponding to the stirring arm, and the electromagnet generates an adsorptive magnetic force on the magnetic metal powder adhered to the stirring arm.

[0021] Furthermore, the electrolysis and electroplating tank is in a cylindrical structure, and the electromagnet is in a corresponding annular structure arranged to fit the outer wall of the electrolysis and electroplating tank.

[0022] Further, it includes a conductive needle roller, which is made of a conductive material and includes an outer portion, a roller and an inner portion;

[0023] The outer part and the inner part are both cylindrical sleeve structures; the outer part is coaxially sleeved outside the inner part, and rollers are rotatably embedded inside the outer part to abut against the outer wall of the inner part; the rollers form a rotating pair with the outer part parallel to the axis of the stirring shaft as the rotating axis, and form a rolling pair with the inner part to contact along the generatrix of the outer wall of the inner part;

[0024] The outer portion is fixedly mounted on the stirring arm, and the inner portion is sleeved on the stirring shaft and fixedly mounted on the stirring shaft, so that the stirring arm is rotatably mounted and connected with the stirring shaft.

[0025] Furthermore, the outer end of the rod-shaped structure is a tree-like bifurcated structure.

[0026] Furthermore, the stirring arm

[0027] Four layers of the rod-like structures are arranged at equal intervals in the form of four rod-like structures being evenly distributed in the circumferential direction of each layer, and the rod-like structures in adjacent layers are arranged in a staggered manner.

[0028] Furthermore, the outer end of the rod-like structure is a tree-like forked structure divided into three branches, and adjacent branches are arranged at an angle of degrees.

[0029] Furthermore, the rod-shaped structure is symmetrical about its own midline.

[0030] Furthermore, the stirring paddle is provided with three stirring blades evenly distributed at an angle of 120° in the circumferential direction, and the inclination angle of the stirring blades is 20°~40°.

[0031] Furthermore, the top and bottom heights of the electromagnet are respectively adapted to the top and bottom heights of the stirring arm, and an insulating sleeve is provided at the connection between the top end of the stirring shaft and the driving machine.

[0032] The utility model provides a rotary electroplating and electrolysis contact device, which has the following beneficial effects:

[0033] 1. The utility model connects the stirring arm installed above the stirring paddle to electricity. The stirring paddle is made of inert insulating material and does not participate in the electrochemical reaction. The fluidity of the electroplating / solution is maintained through the stirring action to achieve uniform distribution of the powder material in the solution. While effectively improving the electrochemical reaction efficiency and reaction uniformity, it avoids its own corrosion or material deposition.

[0034] 2. The stirring arm of the utility model has a multi-layer tree-like forked structure evenly distributed in the circumference, forming a three-dimensional electrode network, which further significantly increases the contact opportunity between the electrode and the powder, so that at the same current density, the voltage on the electrode surface is lower, which helps to reduce the overpotential phenomenon and avoid unnecessary side reactions, thereby improving the quality of electroplating or electrolysis, and also helps to reduce the energy consumption of electroplating and achieve environmental friendliness.

[0035] 3. The fine tree-like forked structure of the stirring arm of the utility model as an electrode helps to minimize the eddy currents generated in the liquid flow, avoid excessive aggregation or dilution of the solute concentration in the local area as much as possible, and facilitate more uniform material deposition during the electroplating or electrolysis process.

[0036] 4. The utility model device provides a detachable electromagnet device. If the solution contains magnetic powder or material with a magnetic metal coating, the electromagnet device can use magnetic force to absorb the magnetic powder material in the electrolysis and electroplating tank to prevent it from accumulating on the electrode, thereby ensuring the normal progress of the electrochemical reaction and the efficiency of the electrochemical reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of the utility model;

[0038] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0039] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0040] Figure 4 It is a schematic diagram of the cross-sectional axonometric structure at AA of the utility model;

[0041] Figure 5 It is a partial cross-sectional enlarged structural schematic diagram of the utility model;

[0042] Figure 6A schematic diagram of the direction of fluid eddy current simulation of the electrolyte or plating solution in the electrolysis and plating tank when the existing agitator is equipped for electrolysis or electroplating;

[0043] Figure 7 Schematic diagram of the simulated vortex direction of the electrolyte or plating solution in the electrolysis and plating tanks during electrolysis or electroplating in Example 1.

[0044] In the figure:

[0045] 1. Electrolysis and electroplating tank; 2. Stirring shaft; 3. Conductive needle roller, 31. External, 32. Roller, 33. Internal; 4. Stirring arm; 5. Stirring paddle; 6. Electromagnet. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] Example 1

[0048] A rotary electroplating and electrolysis contact device, such as Figure 1~Figure 5 As shown, the structural relationship is as follows: it includes an electrolysis and electroplating tank 1 with an opening at the top and a stirring structure with an active end extending into the bottom of the electrolysis and electroplating tank 1, and the stirring structure includes a stirring shaft 2, a stirring arm 4 and a stirring paddle 5;

[0049] The stirring blade 5 is made of insulating material. When actually set, the stirring blade 5 is preferably made of polytetrafluoroethylene;

[0050] As the active end of the stirring structure, it is fixed to the bottom end of a stirring shaft 2 made of a conductive material; the stirring shaft 2 is connected to a driving machine that drives it to rotate around its own axis, and the stirring shaft 2 is electrically connected to the electrode of the power supply;

[0051] The stirring arm 4 is located above the stirring paddle 5 and is made of a conductive material. In actual setting, the stirring arm 4 is preferably made of a conductive metal; the stirring arm 4 is coaxial and has multiple layers of radially outward-extending rod-like structures that are evenly distributed circumferentially; the stirring arm 4 is rotatably mounted on the stirring shaft 2, and a rotating pair is formed between the two with the axis of the stirring shaft 2 as the rotating axis.

[0052] Preferably, it also includes an electromagnet 6;

[0053] An electromagnet 6 is provided outside the electrolysis and electroplating tank 1 at a position corresponding to the stirring arm 4 , and the electromagnet generates an adsorptive magnetic force on the magnetic metal powder adhered to the stirring arm 4 .

[0054] Preferably, the electrolysis and electroplating tank 1 is in a cylindrical structure, and the electromagnet 6 is in a ring-shaped structure correspondingly arranged to fit the outer wall of the electrolysis and electroplating tank 1 .

[0055] Preferably, it comprises a conductive needle roller 3, which is made of a conductive material and comprises an outer portion 31, a roller 32 and an inner portion 33;

[0056] The outer part 31 and the inner part 33 are both cylindrical sleeve structures; the outer part 31 is coaxially sleeved outside the inner part 33, and rollers 32 are rotatably embedded inside the outer part 31 to abut against the outer wall of the inner part 33; the rollers 32 and the outer part 31 form a rotation pair with their own axis parallel to the stirring shaft 2 as the rotation axis, and form a rolling pair with the inner part 33 to contact along the generatrix of the outer wall of the inner part 33;

[0057] The outer portion 31 is fixedly mounted on the stirring arm 4 , and the inner portion 33 is sleeved on the stirring shaft 2 and fixedly mounted on the stirring shaft 2 , so that the stirring arm 4 is rotatably mounted and connected to the stirring shaft 2 .

[0058] Preferably, the outer end of the rod-shaped structure is a tree-like forked structure.

[0059] Preferably, the stirring arm 4

[0060] Four layers of rod-shaped structures are arranged at equal intervals in the form of four rod-shaped structures evenly distributed in the circumferential direction of each layer, and the rod-shaped structures of adjacent layers are arranged in a staggered manner.

[0061] Preferably, the outer end of the rod-like structure is a tree-like forked structure divided into three branches, and adjacent branches are arranged at an angle of 30°.

[0062] Preferably, the rod-shaped structure is symmetrical about its own midline.

[0063] Preferably, the stirring paddle 5 is provided with three stirring blades evenly distributed at an angle of 120° in the circumferential direction, and the inclination angle of the stirring blades is 20° to 40°.

[0064] Preferably, the top and bottom heights of the electromagnet 6 are respectively adapted to the top and bottom heights of the stirring arm 4, and an insulating sleeve is provided at the connection between the top end of the stirring shaft 2 and the driving machine.

[0065] The stirring arm 4 is provided with four layers of rod-like structures, and each layer has four rod-like structures evenly distributed along the circumference, and the four layers of rod-like structures are staggered at a deflection angle of 22.5°; the outer end of the rod-like structure is a tree-like forked structure divided into three branches, and adjacent branches are arranged at an angle of 30°.

[0066] See also Figure 7 When the above-mentioned electroplating and electrolysis contact device is working, the fluid of the electrolyte or electroplating solution in the electrolysis and electroplating tank 1 generates eddies around the container, driving the powder to undergo redox reaction at the eddies, thereby reducing the contact between the powder and the metal stirring arm.

[0067] See also Figure 6 If the stirring structure in the above-mentioned electroplating and electrolysis contact device is replaced with the existing agitator, the liquid flow direction of the electrolyte or electroplating solution in the electrolysis and electroplating tank 1 is relatively uniform, which makes it easy for the powder to contact the agitator and cause side reactions.

[0068] It can be seen that replacing the above-mentioned contact device for electroplating and electrolysis can significantly improve the vortex of the liquid, reduce the contact between the powder and the agitator, and better avoid the occurrence of side reactions.

[0069] During specific use, after the stirring shaft 2 is electrically connected to the motor of the power supply, the stirring arm 4 connected to the stirring shaft is charged as an electrode, and the stirring paddle 5 is not charged and does not participate in the electrochemical reaction, thereby avoiding corrosion or material deposition caused by self-electrolysis.

[0070] During the electroplating or electrolysis process, the driving machine drives the stirring paddle 5 to rotate via the stirring shaft 2, thereby improving the fluidity of the plating solution or electrolyte in the electrolysis and electroplating tank 1, achieving the homogenization of the electrolyte, and improving the electrochemical reaction efficiency and reaction uniformity.

[0071] The magnetic metal powder adhered to the stirring arm 4 produced during the electroplating or electrolysis process is separated from the stirring arm 4 in a motion manner close to centrifugal motion under the action of the centrifugal force generated by the flow of electrolyte and the magnetic attraction of the electromagnet 6, and is adsorbed and adhered to the inner wall of the electrolysis and electroplating tank 1.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary electroplating and electrolysis contact device, comprising an electrolysis and electroplating tank (1) with an opening at the top and a stirring structure with an active end extending into the bottom of the electrolysis and electroplating tank (1), characterized in that: The stirring structure comprises a stirring shaft (2), a stirring arm (4) and a stirring paddle (5); The stirring paddle (5) is made of insulating material. As the active end of the stirring structure, it is fixedly mounted on the bottom end of the stirring shaft (2) made of a conductive material; the stirring shaft (2) is connected to a driving machine that drives it to rotate around its own axis, and the stirring shaft (2) is electrically connected to an electrode of a power source; The stirring arm (4) is located above the stirring paddle (5) and is made of a conductive material. The stirring arm (4) is a coaxial, multi-layer, circumferentially evenly arranged radially outwardly extending rod-shaped structure. The stirring arm (4) is rotatably mounted on the stirring shaft (2), and a rotating pair is formed between the two with the axis of the stirring shaft (2) as the rotating axis.

2. A rotary electroplating and electrolysis contact device according to claim 1, characterized in that: Also includes an electromagnet (6); The electromagnet (6) is arranged outside the electrolysis and electroplating tank (1) at a position corresponding to the stirring arm (4), and the electromagnet generates an adsorptive magnetic force on the magnetic metal powder adhered to the stirring arm (4).

3. A rotary electroplating and electrolysis contact device according to claim 2, characterized in that: The electrolysis and electroplating tank (1) is in the form of a cylindrical structure, and the electromagnet (6) is in the form of an annular structure that is arranged to fit the outer wall of the electrolysis and electroplating tank (1).

4. A rotary electroplating and electrolysis contact device according to claim 1, characterized in that: It comprises a conductive needle roller (3), wherein the conductive needle roller (3) is made of a conductive material and comprises an outer portion (31), a roller (32) and an inner portion (33); The outer portion (31) and the inner portion (33) are both cylindrical sleeve structures; the outer portion (31) is coaxially sleeved outside the inner portion (33), and rollers (32) are rotatably embedded inside the outer portion (31) and are in contact with the outer wall of the inner portion (33); a rotation pair is formed between the rollers (32) and the outer portion (31) with the axis of the rollers (32) being parallel to the axis of the stirring shaft (2) as the rotation axis, and a rolling pair is formed between the rollers (32) and the inner portion (33) in contact with the generatrix of the outer wall of the inner portion (33); The outer portion (31) is fixedly mounted on the stirring arm (4), and the inner portion (33) is sleeved on the stirring shaft (2) and fixedly mounted on the stirring shaft (2), so that the stirring arm (4) is rotatably mounted and connected to the stirring shaft (2).

5. A rotary electroplating and electrolysis contact device according to any one of claims 1 to 4, characterized in that: The outer end of the rod-shaped structure is a tree-like bifurcated structure.

6. A rotary electroplating and electrolysis contact device according to claim 5, characterized in that: The stirring arm (4) has four layers of rod-shaped structures arranged at equal intervals in the form of four rod-shaped structures evenly distributed in the circumferential direction of each layer, and the rod-shaped structures in adjacent layers are arranged in a staggered manner.

7. A rotary electroplating and electrolysis contact device according to claim 5, characterized in that: The outer end of the rod-like structure is a tree-like forked structure divided into three forks, and adjacent forks are arranged at an angle of 30°.

8. A rotary electroplating and electrolysis contact device according to claim 7, characterized in that: The rod-shaped structure is symmetrical about its own midline.

9. The rotary electroplating and electrolysis contact device according to claim 1, characterized in that: The stirring paddle (5) is provided with three stirring blades evenly distributed at an angle of 120° in the circumferential direction, and the inclination angle of the stirring blades is 20° to 40°.

10. The rotary electroplating and electrolysis contact device according to claim 2, characterized in that: The top and bottom heights of the electromagnet (6) are respectively adapted to the top and bottom heights of the stirring arm (4), and an insulating sleeve is provided at the connection between the top end of the stirring shaft (2) and the driving machine.

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