Magnetic coupling transmission stirring passivation device for aluminum parts

Abstract

This utility model discloses a magnetic coupling transmission stirring passivation device for aluminum parts, including a base, a passivation groove at the top of the base, an aluminum part placement device at the opening of the passivation groove, a heat dissipation component and a drive motor inside the base, an external active magnetic ring installed at the output end of the drive motor, a stirring blade inside the passivation groove, a drain valve on one side of the passivation groove, and a heat dissipation component including a heat dissipation pipe. This utility model stirring passivation device uses magnetic coupling transmission, with a drive magnet connected to the drive motor outside the passivation groove and a driven magnet inside the groove. The stirring blade is driven by magnetic force. Compared with traditional devices, its non-contact transmission avoids direct contact between the stirring components and the passivation liquid, preventing component corrosion and liquid leakage. At the same time, the external active magnetic ring and stirring blade can be disassembled and replaced without removing screws, realizing quick switching between different specifications of components and shortening maintenance time.

Description

Technical Field

[0001] This utility model mainly relates to the field of aluminum surface treatment technology, specifically to a magnetic coupling transmission stirring passivation device for aluminum parts. Background Technology

[0002] In the aluminum parts processing, passivation is a crucial step in improving corrosion resistance, surface hardness, and appearance quality. Currently, common aluminum passivation devices employ various stirring methods. Traditional mechanical stirring, such as the stirring device for preparing chromium-free passivating agents (CN221182622U), uses a motor to drive a stirring blade directly in the passivation solution. However, this method has several drawbacks. Firstly, the stirring blade and motor are connected by a mechanical shaft. In the long-term corrosive environment of the passivation solution, this shaft is prone to corrosion, leading to frequent equipment failures, high maintenance costs, and long downtime, severely impacting production efficiency. Secondly, the mechanical seal is difficult to achieve a complete seal, allowing the passivation solution to leak, wasting the solution, potentially polluting the surrounding environment, and increasing safety hazards.

[0003] Some methods employ gas agitation, such as the CN209941089U baffle-driven agitation passivation device. This device agitates the passivation solution by introducing gas into it and using the resulting gas bubbles to drive the flow of the passivation solution. However, this method results in uneven agitation, with insufficient agitation in certain areas of the passivation solution. This fails to ensure that all parts of the aluminum component are fully and uniformly contacted with the passivation solution, leading to inconsistent passivation quality and affecting the overall product quality. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. It mainly provides a magnetic coupling transmission stirring and passivation device for aluminum parts, which solves the technical problems mentioned in the background art, such as easy corrosion of mechanical transmission, uneven stirring, and safety hazards in traditional stirring and passivation devices.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A magnetic coupling drive stirring passivation device for aluminum parts includes a base, a passivation groove on the top of the base, an aluminum part placement device at the opening of the passivation groove, a heat dissipation component and a drive motor inside the base, an external active magnetic steel ring installed at the output end of the drive motor, a stirring blade inside the passivation groove, and a drain valve on one side of the passivation groove.

[0007] The heat dissipation component includes a heat dissipation pipe, which is attached to the outer wall of the drive motor to dissipate heat from the drive motor.

[0008] More preferably, the two ends of the heat dissipation pipe are respectively sealed to the water inlet pipe and the water outlet pipe via connecting hoses. The water inlet pipe and the water outlet pipe pass through and are sealed and fixed to both sides of the base. The outlet of the drain valve is connected to the water inlet end of the water inlet pipe via a connecting hose.

[0009] More preferably, the external active magnetic steel ring is composed of neodymium iron boron permanent magnets arranged in an alternating circumferential magnetization pattern and fixed to the output shaft of the drive motor by a flange, generating a stable and controllable magnetic field as the drive motor rotates.

[0010] More preferably, the stirring blade is composed of a blade and a driven magnet assembly. The driven magnet assembly consists of multiple fan-shaped permanent magnets distributed circumferentially along the rotation center of the blade. The polarity of the magnets corresponds to the external active magnet ring, forming a magnetic coupling transmission path. The blade surface is designed as a hyperboloid twisted structure, which generates a composite flow field of axial thrust and radial shear force when rotating.

[0011] More preferably, the passivation groove is made of a corrosion-resistant material, and the base is cast from HT250 gray cast iron.

[0012] More preferably, the aluminum part placement device includes a frame, a wire basket, and handles. The frame is a rectangular frame structure. The wire basket is fixedly installed at the bottom of the frame. There are two handles, which are respectively fixedly installed on the two sides of the top of the frame. The bottom of the frame is provided with a slot that matches the top of the passivation groove, and the two can be connected and cooperated.

[0013] More preferably, an installation frame is fixedly installed on the outer wall of the passivation groove near the bottom edge and on the outer wall of the base near the top edge, and the top surface of the installation frame is provided with several round holes for inserting fixing bolts, thereby realizing the installation of the passivation groove and the base.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This stirring and passivation device employs a magnetic coupling transmission principle to design its stirring system. A driving magnet is installed outside the passivation tank, while a driven magnet is installed inside. The driving magnet is connected to a drive motor, which rotates the driving magnet. The magnetic force then drives the internal driven magnet to rotate synchronously, thereby agitating the stirring blades connected to the driven magnets in the passivation liquid. Compared to traditional stirring and passivation devices, this non-contact magnetic coupling transmission method avoids direct contact between the driving motor and other stirring components and the passivation liquid, preventing corrosion of these components and avoiding leakage. Furthermore, the stirring components, consisting of an external active magnetic ring and stirring blades, can be directly disassembled and replaced from the device according to the application scenario without disassembling screws or other fasteners. This allows for rapid switching between different sizes of stirring components (different sizes of stirring blades), reducing equipment maintenance time.

[0016] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is an enlarged structural schematic diagram of the heat dissipation component of this utility model.

[0020] Numbering on the map:

[0021] 1. Base; 2. Passivation groove; 3. Aluminum parts placement device; 4. Heat dissipation assembly; 401. Heat dissipation pipe; 402. Connecting hose; 403. Water inlet pipe; 404. Drain pipe; 5. Drive motor; 6. External active magnetic steel ring; 7. Stirring blade; 8. Drain valve; 9. Connecting hose. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Please refer to the appendix carefully. Figures 1-3 A magnetic coupling transmission stirring passivation device for aluminum parts includes a base 1, a passivation groove 2 installed on the top of the base 1, an aluminum part placement device 3 installed at the opening of the passivation groove 2, a heat dissipation component 4 installed inside the base 1, and a drive motor 5 (a waterproof and corrosion-resistant variable frequency motor, whose speed can be adjusted according to different passivation process requirements) installed via shock-absorbing rubber pads and bolts. The drive motor 5 is connected to the motor output shaft and an external active magnet ring 6 via a flat key, ensuring that the rotational power of the drive motor 5 can be transmitted to the external active magnet ring 6. A stirring blade 7 is attached to the bottom of the inner wall of the passivation groove 2 (a shallow groove adapted to the stirring blade 7 can be opened at the bottom of the inner wall of the passivation groove 2, the position of which corresponds to the external active magnet ring 6, and its structural design does not affect the rotation of the stirring blade 7; this groove can be used to realize the interaction between the stirring blade 7 and the external active magnet ring 6). The accurate positioning and adsorption are achieved through the interaction of magnetic force with the external active magnetic steel ring 6. A liquid outlet pipe is provided on one side of the passivation tank 2. The liquid outlet pipe is connected to the drain valve 8 through a Y-type filter (a corrosion-resistant Y-type filter is used to filter passivation liquid crystals / precipitates). The liquid outlet pipe is made of corrosion-resistant PVC material to ensure that the liquid can flow out of the passivation tank 2 smoothly.

[0025] The heat dissipation component 4 includes a heat pipe 401, which is attached to the outer wall of the drive motor 5 for dissipating heat from the drive motor 5.

[0026] In this embodiment, as Figure 1 and Figure 3As shown, the two ends of the heat dissipation pipe 401 are respectively sealed to the water inlet pipe 403 and the drain pipe 404 through the docking hose 402. The water inlet pipe 403 and the drain pipe 404 pass through and are sealed and fixed to both sides of the base 1. The outlet of the drain valve 8 is connected to the connecting hose 9 through the Y-type filter. One end of the connecting hose 9 is connected to the water inlet end of the water inlet pipe 403. The heat dissipation pipe 401 adopts a spiral winding structure design and is tightly fitted to the outer wall of the drive motor 5. The water inlet pipe 403, the drain pipe 404 and the heat dissipation pipe 401 are all made of 316L stainless steel. The connecting hose 9 and the docking hose 402 are both made of corrosion-resistant materials. When the passivation liquid passes through the drain valve 8, the connecting hose 9 and the water inlet pipe 403 in sequence, enters the spiral heat dissipation pipe 401, and after circulating heat exchange, it is discharged through the docking hose 402 and the drain pipe 404, which can dissipate heat from the drive motor 5.

[0027] In this embodiment, as Figure 2 As shown, the external active magnetic steel ring 6 is composed of 12 sector-shaped magnetic steel blocks. Each magnetic steel block is a neodymium iron boron N52 model with a double-layer epoxy zinc-based coating on the surface, with a thickness of 0.15mm, to prevent the magnetic steel blocks from rusting. The magnetic steel blocks are connected by M6 stainless steel bolts to form a complete ring structure and are fixed to the output shaft of the drive motor 5 by a flange. When the drive motor 5 rotates, it generates a stable and controllable magnetic field. The inner diameter of the external active magnetic steel ring 6 maintains an air gap of 8-10mm with the outer diameter of the permanent magnet in the stirring blade 7. This air gap can ensure the effective transmission of magnetic force and avoid contact and collision between the two. A protective cover is set on the outside of the magnetic steel ring. The protective cover is made of aluminum alloy and is fixed to the magnetic steel ring by bolts to protect the magnetic steel ring.

[0028] In this embodiment, as Figure 2 As shown, the stirring blade 7 consists of a blade and a driven magnet assembly. The blade is integrally formed from corrosion-resistant titanium alloy or 316L stainless steel. The blade diameter is 1 / 3 to 1 / 2 of the inner diameter of the passivation groove 2. The blade surface is twisted with a twist angle of 30° to 60° to enhance the stirring effect on the passivation liquid. The driven magnet assembly is embedded in the internal hollow cavity. The driven magnet assembly consists of multiple fan-shaped permanent magnets distributed circumferentially along the rotation center of the blade. The polarity of the magnets corresponds to the external active magnet ring 6, forming a magnetic coupling transmission path. The permanent magnet is a samarium cobalt permanent magnet, which is ring-shaped and its outer diameter matches the central axis of the blade. It is embedded into the central axis of the blade through an interference fit with a clearance of 0.05-0.1mm. At the connection between the permanent magnet and the blade, a two-component epoxy resin is used for sealing and filling to form a 1mm thick sealing layer to ensure that the permanent magnet works stably in the passivation liquid environment and is not affected by corrosion.

[0029] In this embodiment, as Figure 2As shown, the passivation tank 2 is made of corrosion-resistant material (such as polypropylene), and the base 1 is made of HT250 gray cast iron. The motor is placed inside the base 1, and the passivation tank 2 is placed on top of the base 1. The gray iron has high strength and can withstand the weight of the passivation tank 2 after it is filled with solution, as well as various stresses that may be generated during use. It is not easy to deform or be damaged, thus ensuring the stability and safety of the passivation tank 2 and extending its service life. The gray iron has good shock absorption performance, which can effectively absorb and buffer the vibration and impact generated by the passivation tank 2 during operation, reduce the impact on the surrounding environment, and also help protect the equipment and workpieces inside the passivation tank 2, reducing the risk of damage caused by vibration.

[0030] In this embodiment, as Figure 2 As shown, the aluminum part placement device 3 includes a frame, a wire basket, and handles. The frame is a rectangular frame structure, and the wire basket is fixedly installed at the bottom of the frame. There are two handles, which are fixedly installed on the two sides of the top of the frame. The bottom of the frame is provided with a slot that matches the top of the passivation tank 2. The top of the passivation tank 2 can be embedded into the slot at the bottom of the frame to achieve a stable assembly of the aluminum part placement device 3 and the passivation tank 2, ensuring that the aluminum part placement device 3 remains stable during the passivation operation. The frame, wire basket, and handles are all made of corrosion-resistant materials to prevent corrosion in the passivation liquid environment. After the aluminum part placement device 3 and the wire basket are assembled, there is a safe distance between the stirring blade 7 and the bottom of the wire basket to prevent the stirring blade 7 from colliding with the wire basket when it rotates.

[0031] In this embodiment, as Figure 1 and Figure 2 As shown, mounting frames are fixedly installed on the outer side wall of the passivation tank 2 near the bottom edge and on the outer side wall of the base 1 near the top edge. Several round holes are opened on the top surface of the mounting frames, which can be used to pass through fixing bolts, thereby realizing the installation of the passivation tank 2 and the base 1. The detachable design facilitates later maintenance and repair. When the passivation tank 2 or the base 1 malfunctions, it can be disassembled for maintenance. Ventilation holes are opened on both sides of the base 1, and detachable dustproof nets are installed in the ventilation holes.

[0032] The specific operating procedure of this utility is as follows: First, place the aluminum part in the aluminum part placement device 3, then turn on the faucet and inject an appropriate amount of passivation liquid into the passivation tank 2. After the appropriate liquid level is reached, turn off the faucet, turn on the power supply of the drive motor 5, and set the speed of the drive motor 5 through the frequency converter. According to the material of the aluminum part and the passivation process requirements, the speed is usually set to 30-80 r / min.

[0033] When the drive motor 5 starts, it drives the external active magnet ring 6 to rotate. Through magnetic coupling, the stirring blade 7 starts to rotate and stir the passivation liquid in the passivation tank 2. Observe the passivation process. If necessary, the speed of the drive motor 5 can be adjusted by the frequency converter to optimize the passivation effect. The duration of the entire passivation process depends on the process requirements, generally 15-30 minutes. After the passivation treatment is completed, turn off the power of the drive motor 5 to stop the stirring blade 7 from rotating. Open the drain valve 8 on the passivation tank 2 to drain the waste liquid. Take out the aluminum parts placement device, and then take out the aluminum parts for subsequent cleaning, drying and other treatments.

[0034] If the passivation tank 2 needs to be cleaned, turn on the water tap and pour cleaning water into the passivation tank 2. After the water level reaches a certain height, start the drive motor 5 again to rotate the stirring blade 7 and clean the passivation tank. The cleaning time is about 5-10 minutes. After cleaning, open the drain valve at the bottom of the passivation tank 2 to drain the wastewater. After draining the wastewater, close the drain valve 8 to complete one complete operation.

[0035] When the waste liquid / cleaning wastewater is discharged through the drain valve 8, the wastewater enters the spiral heat dissipation pipe 401 through the connecting hose 9 and the water inlet pipe 403. After circulating heat exchange, it is discharged through the docking hose 402 and the drain pipe 404, which can dissipate heat from the drive motor 5.

[0036] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A magnetically coupled drive stirring and passivation device for aluminum parts, comprising a base (1), characterized in that: The base (1) is provided with a passivation groove (2) at the top, and an aluminum part placement device (3) is provided at the opening of the passivation groove (2). The base (1) is provided with a heat dissipation component (4) and a drive motor (5). An external active magnetic steel ring (6) is installed at the output end of the drive motor (5). A stirring blade (7) is provided inside the passivation groove (2). A drain valve (8) is provided on one side of the passivation groove (2). The heat dissipation component (4) includes a heat dissipation pipe (401), and the heat dissipation pipe (401) is attached to the outer wall of the drive motor (5) for dissipating heat from the drive motor (5).

2. The magnetic coupling transmission stirring passivation device for aluminum parts according to claim 1, characterized in that: The two ends of the heat dissipation pipe (401) are respectively sealed to the water inlet pipe (403) and the drain pipe (404) through the connecting hose (402). The water inlet pipe (403) and the drain pipe (404) pass through and are sealed and fixed to both sides of the base (1). The outlet of the drain valve (8) is connected to the water inlet end of the water inlet pipe (403) through the connecting hose (9).

3. The magnetic coupling transmission stirring passivation device for aluminum parts according to claim 1, characterized in that: The external active magnetic steel ring (6) is composed of neodymium iron boron permanent magnets arranged in an alternating circumferential magnetization pattern and fixed to the output shaft of the drive motor (5) by a flange. When the drive motor (5) rotates, it generates a stable and controllable magnetic field.

4. The magnetic coupling transmission stirring passivation device for aluminum parts according to claim 1, characterized in that: The stirring blade (7) consists of a blade and a driven magnet assembly. The driven magnet assembly consists of multiple fan-shaped permanent magnets distributed circumferentially along the rotation center of the blade. The polarity of the magnets corresponds to the external active magnet ring (6), forming a magnetic coupling transmission path. The blade surface is designed as a hyperboloid twisted structure, which generates a composite flow field of axial thrust and radial shear force when rotating.

5. The magnetic coupling transmission stirring passivation device for aluminum parts according to claim 1, characterized in that: The passivation groove (2) is made of corrosion-resistant material, and the base (1) is made of HT250 gray cast iron.

6. The magnetic coupling transmission stirring passivation device for aluminum parts according to claim 1, characterized in that: The aluminum placement device (3) includes a frame, a wire basket and a handle. The frame is a rectangular frame structure. The wire basket is fixedly installed at the bottom of the frame. The handle is set as two and fixedly installed on the two sides of the top of the frame. The bottom of the frame is provided with a slot that matches the top of the passivation groove (2). The two can be connected and cooperate.

7. The magnetic coupling transmission stirring passivation device for aluminum parts according to claim 1, characterized in that: The passivation groove (2) is fixedly installed with a mounting frame near the bottom edge of the outer wall and the base (1) is fixedly installed with a mounting frame near the top edge of the outer wall. The top surface of the mounting frame is provided with several round holes, which can be used to insert fixing bolts, thereby realizing the installation of the passivation groove (2) and the base (1).

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