An eddy current metal sorter

Abstract

This application relates to metal sorting technology, specifically an eddy current metal separator, including a screening assembly, a drive assembly, and a magnetic separation assembly. The magnetic separation assembly also includes an arc-shaped scraper bucket, one end of which is connected to a rotating shaft. The rotating shaft is connected to a geared motor, which drives the arc-shaped scraper bucket to intermittently swing upwards or downwards. The magnetic separation assembly uses N / S extremely high frequency alternating excitation coils, which generate an alternating magnetic field when rotating at high speed. The metals are initially screened based on the difference in magnetic field gradient. Strongly magnetic metals are adsorbed onto the outer surface of the magnetic separation unit and precisely scraped off by the scraper; weakly magnetic metals, due to insufficient adsorption, naturally fall into the interior of the magnetic separation unit and are cleaned by the swinging arc-shaped scraper bucket, achieving stratified capture of strongly and weakly magnetic metals.

Description

Technical Field

[0001] This utility model relates to metal sorting technology, specifically an eddy current metal sorting machine. Background Technology

[0002] Eddy current magnetic separator is a physical sorting device that uses the principle of electromagnetic induction to separate non-metals. Its core principle is based on the interaction between the eddy current effect and the Lorentz force.

[0003] When a conductive metal enters a rapidly changing magnetic field, according to Faraday's law of electromagnetic induction, a closed-loop current, known as an eddy current, is induced inside the metal. The intensity of the eddy current is proportional to the metal's conductivity, the rate of change of the magnetic field, and the magnetic field gradient. The current generated by the eddy current interacts with the external magnetic field, producing a Lorentz force. The direction of the Lorentz force is perpendicular to both the magnetic field direction and the direction of the metal's movement, creating an attractive or repulsive force. Non-conductors or weakly conductive materials, not generating eddy currents, fall along their original trajectory, thus achieving sorting.

[0004] Existing technology includes an electromagnetic eddy current separator as proposed in Chinese patent application CN109277189A. In this patent, the magnetic separator drum includes a fixedly mounted main shaft, a cylinder mounted outside the main shaft and rotatably mounted thereon, and a magnetic system assembly disposed inside the cylinder and fixedly connected to the main shaft. The magnetic system assembly includes several magnetic system units, each of which includes an iron core and multiple excitation coils disposed on the iron core. The belt conveyor includes a drive drum connected to a power unit and a conveyor belt surrounding the drive drum and the cylinder. The material distribution device includes an inclined material distribution plate.

[0005] However, since the metals in the waste have different magnetic properties, the metals with weaker magnetic separation will fall off naturally along with the non-conductors, resulting in low separation efficiency. Therefore, there is a need for further improvement of the existing technology. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides an eddy current metal separator to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: An eddy current metal separator, characterized in that it comprises: a screening assembly, a driving assembly, and a magnetic separation assembly, wherein the driving assembly and the magnetic separation assembly are respectively installed above the screening assembly. The drive assembly includes a servo motor, with a transmission wheel connected to the output shaft of the servo motor, and a geared motor connected via the transmission wheel. A drive motor is located in the opposite direction of the servo motor. The magnetic separation assembly includes an adjusting frame with adjusting rods at both ends. A scraper is fixedly connected to the lower part of the adjusting frame, and a funnel is provided at the end of the scraper away from the adjusting frame. The magnetic separator also includes an arc-shaped scraper bucket inside, with a rotating shaft at one end. The rotating shaft is connected to a geared motor, which drives the arc-shaped scraper bucket to swing up or down intermittently.

[0008] Preferably, the screening assembly includes a base frame, a screening frame is fixedly connected to the top of the base frame, the screening frame has an arc-shaped screening groove in the middle, the screening groove is provided with multiple independent screening bars, and the multiple independent screening bars are connected to the through groove at the bottom of the screening frame.

[0009] Preferably, a support frame is provided above the screening frame, and multiple screening boxes are provided above the support frame. A baffle installed at an angle is provided on the top of the screening box, and an arc-shaped groove is installed at the bottom of the screening box, with the arc-shaped groove opposite to the screening groove.

[0010] Preferably, the magnetic separation assembly further includes a magnetic separation unit, which is installed directly above the screening trough, and the screening box is located inside the magnetic separation unit. The middle part of the magnetic separation unit is fixedly connected to the output shaft of the drive motor, and the drive motor drives the magnetic separation unit to rotate.

[0011] Preferably, the magnetic separation unit includes an iron core ring, on which multiple independent excitation coils are disposed, with adjacent excitation coils alternating between N and S poles at high frequencies. The magnetic separation unit has retaining plates installed on both sides below it, and there is a gap between the retaining plates and the magnetic separation unit.

[0012] Preferably, an air separation chamber is installed at the bottom of the trough, and the slag discharged through the trough is located inside the air separation chamber. A vent is provided on one side of the air separation chamber, and a slag discharge hole is provided at the bottom of the air separation chamber. Airflow is introduced into the vent, which blows up the lighter plastic material inside the air separation chamber, while the heavier metal material is discharged through the slag discharge hole.

[0013] Compared with the prior art, this utility model provides an eddy current metal separator, which has the following advantages: The magnetic separation unit uses N / S high-frequency alternating excitation coils, which generate an alternating magnetic field when rotating at high speed. The metals are initially screened by the difference in magnetic field gradient. Strongly magnetic metals are adsorbed onto the outer surface of the magnetic separation unit and precisely scraped off by a scraper; weakly magnetic metals, due to insufficient adsorption force, naturally fall into the interior of the magnetic separation unit and are cleaned by the swinging of the arc-shaped scraper bucket, achieving stratified capture of strongly and weakly magnetic metals.

[0014] The height of the adjustment frame is adjustable. By changing the gap between the scraper and the magnetic separation unit, it can adapt to the stripping requirements of metals with different particle sizes and avoid residue or excessive wear. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the eddy current metal separator of this utility model; Figure 2 This is a schematic diagram of the eddy current metal separator of this utility model from another angle; Figure 3 This is a schematic diagram of the structure of the magnetic separation component of this utility model; Figure 4 This is a partial structural schematic diagram of the magnetic separation component of this utility model; Figure 5 This is a partial structural diagram of the screening component of this utility model.

[0016] In the figure: screening assembly 10, base frame 11, screening frame 12, screening trough 121, through trough 122, support frame 13, screening box 14, baffle 141, arc groove 15, air separation chamber 16, ventilation hole 161, slag discharge hole 162, drive assembly 20, servo motor 21, transmission wheel 22, annular channel 23, reduction motor 24, drive motor 25, magnetic separation assembly 30, adjusting frame 31, adjusting rod 32, scraper 33, funnel 34, magnetic separation unit 35, iron core ring 351, excitation coil 352, arc scraper hopper 36, rotating shaft 361, holding plate 37. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0018] Please see Figures 1 to 5 An eddy current metal separator includes: a screening assembly 10, a drive assembly 20, and a magnetic separation assembly 30, wherein the drive assembly 20 and the magnetic separation assembly 30 are respectively installed above the screening assembly 10.

[0019] The screening assembly 10 includes a base frame 11, and a screening frame 12 is fixedly connected to the top of the base frame 11. The screening frame 12 has an arc-shaped screening groove 121 in the middle.

[0020] The screening trough 121 is equipped with multiple independent screening bars, which communicate with the through groove 122 at the bottom of the screening frame 12. A support frame 13 is provided above the screening frame 12, and multiple screening boxes 14 are provided above the support frame 13. The top of the screening box 14 is provided with an obliquely installed baffle 141. An arc-shaped groove 15 is installed at the bottom of the screening box 14, which is opposite to the screening trough 121.

[0021] The drive assembly 20 includes a servo motor 21, with a transmission wheel 22 connected to the output shaft of the servo motor 21, and a reduction motor 24 connected through the transmission wheel 22. A drive motor 25 is located in the other direction of the servo motor 21.

[0022] The magnetic separator 30 includes an adjusting frame 31, with adjusting rods 32 at both ends of the adjusting frame 31. A scraper 33 is fixedly connected to the lower part of the adjusting frame 31, and a funnel 34 is provided at the end of the scraper 33 away from the adjusting frame 32.

[0023] The magnetic separation assembly 30 also includes a magnetic separation unit 35, which is installed directly above the screening trough 121, and the screening box 14 is located inside the magnetic separation unit 35. The middle part of the magnetic separation unit 35 is fixedly connected to the output shaft of the drive motor 25, and the drive motor 25 drives the magnetic separation unit 35 to rotate.

[0024] The magnetic separation unit 35 includes an iron core ring 351, on which multiple independent excitation coils 352 are disposed. Adjacent excitation coils 352 alternate between N and S poles at high frequency. Holding plates 37 are installed on both sides of the lower part of the magnetic separation unit 35. A gap exists between the holding plates 37 and the magnetic separation unit 35 to prevent the magnetic separation unit 35 from tilting in one direction during high-speed rotation.

[0025] In this embodiment, see again Figures 1 to 2 The screening frame 12 is equipped with an annular channel 23. Waste materials to be sorted are blown in through the annular channel 23, and the servo motor 21 drives the magnetic separation unit 35 to rotate, adsorbing the metal objects in the waste materials onto the outer surface of the magnetic separation unit 35. Then, the metal objects are scraped off by the scraper 33 and discharged through the funnel 34.

[0026] Furthermore, the gap between the scraper 33 and the magnetic separation unit 35 can be changed by adjusting the height of the adjustment frame 35, thereby further scraping off the metal objects on its outer surface.

[0027] Since the metals in the waste have different magnetic properties, the stronger magnetic metals will be attracted to the outer surface of the magnetic separation unit 35, while the weaker magnetic metals will fall naturally into the interior of the magnetic separation unit 35.

[0028] Furthermore, the magnetic separation unit 35 is also equipped with an arc-shaped scraper bucket 36, and a rotating shaft 361 is provided at one end of the arc-shaped scraper bucket 36. The rotating shaft 361 is connected to the geared motor 24, which drives the arc-shaped scraper bucket 36 to swing up or down intermittently.

[0029] In this embodiment, metal objects that fall naturally into the magnetic separation unit 35 are caught by the arc-shaped scraper bucket 36. Some of the metal objects will still adhere to the inner wall of the magnetic separation unit 35. The arc-shaped scraper bucket 36 is driven upward by the reduction motor 24 to scrape away the metal objects inside the magnetic separation unit 35. Then, the arc-shaped scraper bucket 36 is driven downward by the reduction motor 24 to pour the metal objects in the arc-shaped scraper bucket 36 into the screening box 14.

[0030] Furthermore, the metal objects in the sieve box 14 are further sieved through the arc-shaped groove 15 and the sieve groove 121, and then discharged through the through groove 122.

[0031] Preferably, an air separation chamber 16 is installed at the bottom of the channel 122, and the contents are discharged through the channel 122 into the air separation chamber 16. A vent 161 is provided on one side of the air separation chamber 16, and a slag discharge hole 162 is provided at the bottom of the air separation chamber 16. Airflow is introduced into the vent 161, which blows up lighter plastic materials inside the air separation chamber 16, while heavier metal objects are discharged through the slag discharge hole 162.

[0032] The above embodiments merely illustrate specific implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. An eddy current metal separator, characterized in that, include: The system comprises a screening assembly, a driving assembly, and a magnetic separation assembly, wherein the driving assembly and the magnetic separation assembly are respectively mounted above the screening assembly. The drive assembly includes a servo motor, with a transmission wheel connected to the output shaft of the servo motor, and a geared motor connected via the transmission wheel. A drive motor is located in the opposite direction of the servo motor. The magnetic separation assembly includes an adjusting frame with adjusting rods at both ends. A scraper is fixedly connected to the lower part of the adjusting frame, and a funnel is provided at the end of the scraper away from the adjusting frame. The magnetic separator also includes an arc-shaped scraper bucket inside, with a rotating shaft at one end. The rotating shaft is connected to a geared motor, which drives the arc-shaped scraper bucket to swing up or down intermittently.

2. The eddy current metal separator according to claim 1, characterized in that: The sieving assembly includes a base frame, a sieving frame is fixedly connected to the top of the base frame, and an arc-shaped sieving groove in the middle of the sieving frame. The sieving groove is provided with multiple independent sieving bars, which are connected to the through groove at the bottom of the sieving frame.

3. The eddy current metal separator according to claim 2, characterized in that: A support frame is provided above the screening frame, and multiple screening boxes are provided above the support frame. A baffle installed at an angle is provided on the top of the screening box, and an arc-shaped groove is installed at the bottom of the screening box, which is opposite to the screening groove.

4. The eddy current metal separator according to claim 1, characterized in that: The magnetic separation assembly also includes a magnetic separation unit, which is installed directly above the screening trough, and the screening box is located inside the magnetic separation unit. The middle part of the magnetic separation unit is fixedly connected to the output shaft of the drive motor, and the drive motor drives the magnetic separation unit to rotate.

5. The eddy current metal separator according to claim 4, characterized in that: The magnetic separation unit includes an iron core ring, on which multiple independent excitation coils are arranged. Adjacent excitation coils alternate between N and S poles at high frequencies. The magnetic separation unit has retaining plates installed on both sides below it, and there is a gap between the retaining plates and the magnetic separation unit.

6. The eddy current metal separator according to claim 2, characterized in that: The bottom of the trough is equipped with an air separation chamber. Waste is discharged through the trough and located inside the air separation chamber. A vent is provided on one side of the air separation chamber, and a slag discharge hole is provided at the bottom of the air separation chamber. Airflow is introduced into the vent, which blows up the lighter plastic material inside the air separation chamber, while the heavier metal material is discharged through the slag discharge hole.

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