JP2005058895A - Permanent magnet-used magnetic sorting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent magnet-used magnetic sorting machine which can be maintained easily in safety. <P>SOLUTION: This permanent magnet-used magnetic sorting machine 1 is provided with: a belt conveyer unit 10 arranged so that the belt surface 11a is faced to a subject W to be sorted while leaving a space between them; and a permanent magnet arranged in the internal space of the unit 10 for attracting magnetic matter Fe from the subject W over a belt 11. The permanent magnet is composed of a first permanent magnet 20N the N pole of which is faced to the belt surface 11a and a second permanent magnet 20S the S pole of which is faced to the belt surface 11a. The operation of this machine 1 can be switched between such a magnetic sorting state that the N pole end face 20a of the first magnet 20N and the S pole end face 20b of the second magnet 20S are faced to the belt surface 11a and such a nonmagnetic sorting state that the N pole end face 20a of the first magnet 20N is faced to the S pole end face 20b of the second magnet 20S at a position higher than the belt surface 11a. The attracted magnetic matter Fe is conveyed to a fixed position by the unit 10 and then released from the attraction of the permanent magnets. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a permanent magnet type magnetic separator that selectively takes out magnetic substances mixed in industrial waste or the like using permanent magnets.

As part of resource recycling, it is widely practiced to collect iron mixed in industrial waste. At this time, a magnetic separator using magnetic force is used in the treatment plant in order to efficiently recover iron and the like. One of such magnetic separators is, for example, as disclosed in Patent Document 1.
Japanese Patent Laid-Open No. 11-104513

  This magnetic separator includes a belt conveyor device in which a belt that circulates between both rollers is stretched between a driving roller and a driven roller, and a direction perpendicular to the traveling direction of the belt in an internal space surrounded by the belt of the belt conveyor device. And a first permanent magnet with the N pole facing the belt surface and a second permanent magnet with the S pole facing the belt surface, and the separation object and the gap carried by the conveyor device for conveyance And has a configuration suspended so as to face each other.

  In the conventional permanent magnet type lifting magnetic separator, two permanent magnets are arranged with different magnetic poles separated from each other toward the belt surface, so that the magnetic field in the vicinity of the selection target is formed substantially parallel to the belt surface. The

  However, even in a transfer conveyor device that transfers a selection target, foreign matter may be pinched or accumulated in the transfer conveyor device. In such a case, if the operation is continued as it is, it will lead to the failure of the apparatus. Therefore, it is necessary to stop the operation of the magnetic separator and remove the foreign matter sandwiched between them.

  However, in the conventional permanent magnet type lifting magnetic separator, since the magnetic field of the permanent magnet does not disappear even if the operation of the magnetic separator is stopped, if the trapped foreign matter is a magnetic substance, the moment it is removed from the conveyor device for conveyance. There is a possibility that the removed foreign matter may hit the worker by vigorously being attracted to the permanent magnet. For this reason, the worker has to proceed with the removal work carefully while avoiding the danger, and there is a problem that it takes time for maintenance. In addition, although maintenance such as removal work may be performed while the worker is under the magnetic separator, the magnetic field of the permanent magnet is still formed, so the worker is in a strong magnetic field of 1000 G or more. There was also a problem that it would be unfavorable for health because it would stay for hours.

  Accordingly, an object of the present invention is to obtain a permanent magnet type magnetic separator that can be easily and safely maintained.

  In order to solve the above-described problems, the present invention provides a belt conveyor device installed so that the belt surface faces the sorting object with a gap, and the sorting object installed in the internal space of the belt conveyor device. In a permanent magnet type magnetic separator equipped with a permanent magnet that adsorbs a magnetic material through a belt, and the adsorbed magnetic material is transferred to a fixed position by the belt conveyor device and then released from the adsorption of the permanent magnet. The permanent magnet is composed of a first permanent magnet with the N pole facing the belt surface and a second permanent magnet with the S pole facing the belt surface, and the N extreme surface of the first permanent magnet and the first permanent magnet. The magnetic selection position where the S extreme surface of the two permanent magnets faces the belt surface, and the N extreme surface of the first permanent magnet and the S extreme surface of the second permanent magnet face each other above the belt surface. In the magnetic separation position It was a permanent magnet magnetic separator, characterized in that it replaced.

  At the magnetic separation position where the N extreme surface of the first permanent magnet and the S extreme surface of the second permanent magnet face the belt surface, the magnetic field formed by the two permanent magnets is from the N pole of the first permanent magnet. It has a magnetic flux distribution that passes through the object to be sorted and travels toward the south pole of the second permanent magnet. On the other hand, in the non-magnetic separation position where the N extreme surface of the first permanent magnet and the S extreme surface of the second permanent magnet face each other above the belt surface, the magnetic field formed by the two permanent magnets is Most of them have a magnetic flux distribution linearly directed from the N extreme surface of the first permanent magnet to the S extreme surface of the second permanent magnet.

  According to the above configuration, the magnetic selection position where the N extreme surface of the first permanent magnet and the S extreme surface of the second permanent magnet face the belt surface, and the first permanent magnet above the belt surface. Since the N extreme surface and the S extreme surface of the second permanent magnet can be switched to a non-magnetic separation position, when performing maintenance, when the permanent magnet is switched to the non-magnetic separation position, the magnetic field is mostly below the magnetic separator. It can be in a nonexistent state. For this reason, a foreign material is not attracted | sucked to a permanent magnet vigorously, and the worker under a magnetic separator is not exposed to a strong magnetic field.

  As described above, the permanent magnet type magnetic separator according to the present invention can easily and easily eliminate the magnetic field under the magnetic separator by switching the permanent magnet to the non-magnetic separation position. It can be safely maintained.

  The best embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a partial sectional view of a permanent magnet type magnetic separator according to the best mode for carrying out the present invention. In the figure, reference numeral 1 denotes a permanent magnet type magnetic separator equipped with a belt conveyor device 10 and a permanent magnet unit 20 installed in the internal space thereof. Reference numeral 2 denotes a conveyor for carrying a sorting object, which is installed so as to be orthogonal to the permanent magnet type magnetic separator 1. The permanent magnet type magnetic separator 1 is installed on the support column 3 so that the belt surface 11a of the belt conveyor device 10 faces the sorting object W carried by the transport conveyor device 2 with a gap, and the sorting target W The magnetic material Fe mixed in the sorting object W is sorted by adsorbing the magnetic material Fe from the magnetic material Fe and dropping it into the accommodation port 4. The gap is set so that the sorting object W can pass under the magnetic separator and the adsorbed magnetic material can be transferred by the belt conveyor device 10. Of course, this permanent magnet type magnetic separator 1 can also be a lifting type.

  As shown in FIGS. 1 to 3, the belt conveyor device 10 includes a driving roller 13 and a driven roller 14 that are pivotally supported by the bearing portion 12 a of the machine frame 12 and a tension that is pivotally supported by the tension bearing portion 12 b of the machine frame 12. The roller 15 is composed of a driving motor 16 fixed to the machine frame 12, a driving roller 13, a driven roller 14, and a belt 11 spanning the tension roller 15.

  The distance between the driving roller 13 and the driven roller 14 is set longer than the entire width of the conveyor device 2 for conveyance. The belt 11 has a scraper 11b.

  When the drive motor 16 is operated, the sprocket 16a fixed to the output shaft rotates, and the sprocket 16c fixed to the drive roller shaft 13a is rotated by the power of the drive motor 16 transmitted through the transmission belt 16b. When the driving roller 13 rotates with this, the belt 11 starts to circulate between the driving roller 13 and the driven roller 14, and the driven roller 14 and the tension roller 15 rotate accordingly, and the belt conveyor device 10 operates. .

  A permanent magnet unit 20 is installed in the internal space of the belt conveyor device 10. The permanent magnet unit 20 includes a first permanent magnet 20N with the N pole facing the belt surface 11a, a second permanent magnet 20S with the S pole facing the belt surface 11a, and yokes 21N and 21S to which the permanent magnets are fixed. And support shafts 22N and 22S to which the yokes 21N and 21S are rotatably attached, and a magnet case 23 for housing these members. The support shafts 22N and 22S are attached to the magnet case 23 as a pair parallel to the belt circulation direction, and the magnet case 23 is fixed to the machine casing 12.

  As shown in FIG. 2, the first permanent magnet 20N and the second permanent magnet 20S are rotated around the support shafts 22N and 22S, thereby the N extreme surface 20a of the first permanent magnet 20N and the second permanent magnet 20S. Magnetic selection position where the S extreme surface 20b faces the belt surface 11a, and nonmagnetic selection where the N extreme surface 20a of the first permanent magnet 20N and the S extreme surface 20b of the second permanent magnet 20S face above the belt surface 11a. Switch to position.

  When the yokes 21N and 21S are respectively horizontal, the magnetic selection position is obtained, and when the yokes 21N and 21S are rotated upward until they are respectively vertical, the non-magnetic selection position is obtained. In this non-magnetic separation position, the first permanent magnet 20N and the second permanent magnet 20S attract each other. Therefore, a rotational moment is generated in the direction returning to the magnetic separation position. Therefore, in order to prevent this, positioning means is provided on the permanent magnet unit 20. It is good to provide.

  The first permanent magnet 20N and the second permanent magnet 20S can be rotated by driving the support shafts 22N and 22S with a worm motor, for example.

  For example, a neodymium magnet can be used for the first permanent magnet 20N and the second permanent magnet 20S. Further, the magnetic field formed by the permanent magnet unit 20 is set to 0.1 T or more at a position 100 mm from the surface of the magnet case 23, and the length of the first permanent magnet 20N and the second permanent magnet 20S in the belt circulation direction is conveyed. It is good to set longer than the full width of the conveyor apparatus 2 for a vehicle.

  When the permanent magnet type magnetic separator 1 having the above-described configuration is operated, the magnetism mixed in the selection target W that is carried to the transfer conveyor device 2 and enters the magnetic field formed by the first permanent magnet 20N and the second permanent magnet 20S. The body Fe is adsorbed through the belt 11. The adsorbed magnetic body Fe is transferred in the circulation direction of the belt 11 by the scraper 11b of the belt 11, and is released from the adsorption and falls to the accommodation port 4 at a fixed position, that is, a position deviating from the magnetic field. When foreign matter is caught in the transfer conveyor device 2 or the like, when the first permanent magnet 20N and the second permanent magnet 20S are switched to the non-magnetic separation position, there is almost no magnetic field below the magnetic separator. Thus, the worker can easily and safely perform maintenance work.

It is the side view which displayed the partial cross section of the permanent magnet type magnetic separator of the best form for implementing this invention. It is a fracture | rupture display figure of the permanent magnet unit of the permanent magnet type magnetic separator of FIG. It is a top view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Permanent magnet type magnetic separator 10 Belt conveyor apparatus 11 Belt 20 Permanent magnet unit 20N 1st permanent magnet 20S 2nd permanent magnet 20a 1st permanent magnet N extreme surface 20b 2nd permanent magnet S extreme surface 21N, 21S Yoke 22N, 22S Support shaft 23 Magnet case W Selection object Fe Magnetic body

Claims (1)

A belt conveyor device installed so that the belt surface faces the sorting object with a gap, and a permanent magnet installed in the inner space of the belt conveyor device to attract the magnetic material from the sorting object through the belt. In the permanent magnet type magnetic separator that is released from the adsorption of the permanent magnet after the adsorbed magnetic material is transferred to a fixed position by the belt conveyor device, the permanent magnet has an N pole on the belt surface And a second permanent magnet having an S pole facing the belt surface, and the N extreme surface of the first permanent magnet and the S extreme surface of the second permanent magnet are the belt surface. And a non-magnetic selection position where the N extreme surface of the first permanent magnet and the S extreme surface of the second permanent magnet face each other above the belt surface. formula Select machine.

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