JPH0368462A - Rotary drum type nonmagnetic metal separator - Google Patents

Abstract

PURPOSE:To prevent a conveyer belt from being damaged by arranging the axis of the revolving shaft of a nonmagnetic outer drum to be in the same vertical plane and downwardly eccentric to the axis of the revolving shaft of an inner magnetic pole roter. CONSTITUTION:The inner magnetic pole roter 5 is revolved by a motor through a revolving shaft 11, and the nonmagnetic outer drum 1 is revolved through the conveyer belt 3. When the conveyer belt 3 comes along the peripheral surface of the nonmagnetic outer drum 1 on the position corresponding to the summit part in the vertical plane containing axis X1-X1 of the revolving shaft 11 of the inner magnetic pole rotor 5, the distance between the conveyer belt 3 and the magnetic pole N or S of the inner magnetic pole roter 5 becomes minimum, and the magnetic field become small and then the belt is separated to the outside of the magnetic field effect. By this method, the separation capacity is improved and the damage of conveyer belt is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating drum type non-magnetic metal separation apparatus.

Migotachi and 1 Conventionally, as this type of separation device, a device has been proposed that uses a rotating magnetic field to separate a non-magnetic metal from a mixture of the non-magnetic metal and other substances.

Among these, a rotating magnet body having a circumferential speed sufficiently faster than the running speed of the conveyor belt is coaxially installed inside the top pulley of the conveyor belt, and by the action of the rotating magnetic field generated by this rotating magnet body, An electromagnetic induction effect is generated between the conveyor belt and the non-magnetic metal traveling along with it, which causes an induced current in the non-magnetic metal, and the interaction between this induced current and the rotating magnetic field causes the non-magnetic metal to become non-magnetic. A device is known in which a thrust is generated in a magnetic metal, and the thrust causes only the non-magnetic metal to be scattered and separated from a mixture with other materials on a conveyor belt.

An example of such a rotary drum type non-magnetic metal separation apparatus is shown in FIG. 3 of the attached drawings. The explanation is as follows.

As shown in the figure, this device consists of a top pulley 1, a tail pulley 2, and an endless conveyor belt 3 wound around their circumferential surfaces.
This conveyor belt machine fI110
In this example, the conveyor belt 3 is made to travel in the direction of arrow Ro by rotating the tail pulley 2 in the direction of arrow R1 by motor 2° via belt 21 and the like. Further, the top pulley 1 is made of a non-magnetic material, and an internal rotating magnet 5 is rotatably disposed therein coaxially with the top pulley 1.

Specifically, this internally rotating magnet body 5 has a large number of, for example, rectangular hexahedral magnets 52 on the outer peripheral surface of its cylindrical body, with different magnetic poles of Ni and S poles alternately. They are arranged at equal angular intervals so that their outer surfaces approach the inner circumferential surface of the top pulley 1. Further, this internal rotating magnet body 5 is rotated in the same direction as the rotation direction R2 of the I-tube pulley 1, but the peripheral speed is controlled by a separate motor 5° via a belt 51 etc. so that the peripheral speed is different. It is designed to rotate with R1.

In this way, each magnet 5□ attached to the internal rotating magnet body 5 has a strong force that passes through the thickness of the top pulley 1 and the conveyor belt 3 wound thereon and reaches the surface of the conveyor belt 3. A device that generates a magnetic force that generates a strong magnetic field is used.

Fl like this! Conveyor belt method, which has precepts
Alternatively, the operation of the rotating drum type non-magnetic metal separation device will be explained as follows.

First, the conveyor belt 3 of the conveyor belt [1110] is driven by a motor 2° to run at a relatively low speed between the tail pulley 2 and the top pulley 1 in the direction of arrow R, while the internal rotating magnet The body 5 is rotated at a circumferential speed R1 several times to several tens of times the speed of the conveyor belt 3 by driving the motor 5°.
When a mixture 6 consisting of non-magnetic gold [61, a non-metal 62 and a magnetic material 63] is supplied onto the surface of the conveyor belt 3 in its upper running path so as to have as uniform a thickness as possible, As the conveyor belt 3 travels, the mixture 6 reaches the area above the vertical line passing through the central axis of the top pulley 1, that is, the top. At this time, the non-magnetic metal 61 contained in the mixture 6 absorbs the rotating magnetic field generated by the magnet 52 attached to the internal rotating magnet body 5, which is rotating at a peripheral speed Rs higher than the top pulley l. As the rotating magnetic field passes through the non-magnetic metal 61, an electromagnetic induction effect is generated in the non-magnetic metal 61, and an induced current, that is, an eddy current as a conductor, is generated in the non-magnetic metal 61. Due to the interaction between the current and the rotating magnetic field generated by the internal rotating magnet body 5, a thrust force acts on the non-magnetic metal 61 in the running direction of the conveyor belt 3.

That is, the non-magnetic metal 61 has r! between it and the conveyor belt 3. A strong thrust or driving force, or a repulsive force in the centrifugal direction, which is different from the propulsive force based on frictional force, is generated,
At the same time, due to the synergistic effect with the rotating magnetic field caused by the rotation of the internal rotating magnet body 5, the conveyor belt 3 is accelerated in the forward running direction. As a result, non-magnetic metal 6
1 follows a falling trajectory 61° as shown in FIG. 3 as a curved line including a tangent line drawn on the peripheral surface of the pulley 1 at the intersection with a vertical line passing through its central axis.
It comes to be released from the surface of the conveyor belt 3. In addition, since the non-metal 62 contained in the mixture 6 is not affected by the attractive force or rotating magnetic field by the magnet 52 of the internal rotating magnet body 5, the horizontal line passing through the outer periphery of the top pulley 1 and its central axis At the intersection with the conveyor belt 3, the conveyor belt 3 falls from the surface of the conveyor belt 3 due to its own weight along a falling locus 62° expressed by a vertical line in contact with its outer peripheral surface. Furthermore, since the magnetic attraction force due to the magnetic field of the magnet 52 of the internally rotating magnet body 5 is greater than the thrust force due to the induced current, the magnetic substance 63 remains attracted to the surface of the conveyor belt 3 until it reaches the lower part of the top pulley 1. However, as the conveyor belt 3 separates from the lower peripheral surface of the top pulley 1, the strength of the magnetic field by the magnet 5□ weakens, so it falls from the surface of the conveyor belt 3 due to its own weight along a falling trajectory of 63 degrees. That will happen.

Therefore, at the locations where various separated objects 61, 62, and 63 fall,
By installing dividers 9°, 9+, 9□, and 9 for each, these items can be sorted and collected.

However, in a conventional rotary drum type nonmagnetic metal separation apparatus of this type having such a configuration, an internal rotating magnet body (internal magnetic pole rotor) 5 and a nonmagnetic outer drum rotating around the outer circumference of the internal rotating magnet body (internal magnetic pole rotor) 5 are used. , or shell (top pulley) 1
are arranged coaxially, and a conveyor belt 3 is endlessly wound around this non-magnetic outer drum (top pulley) 10 between it and another pulley, that is, the tail pulley 2. During operation, the internal magnetic pole rotor 5 and the non-magnetic outer drum (top pulley) 1 are rotated and driven simultaneously, and the non-magnetic outer drum l
The conveyor belt 3 is rotated and driven to feed the workpiece 6 onto the conveyor belt 3 while continuously running toward the internal magnetic pole rotor 5 which is also being rotated and driven. The workpieces 6 are continuously transported through the belt 3 toward the internal magnetic pole rotor 5, but the workpieces 6 that are transported through the conveyor belt 3 are previously subjected to a strong process using a magnetic separator or the like. Magnetic material 6
36 has been collected and removed, but when it is crushed and cut, non-metals with a small amount of ferromagnetic material (such as iron pieces), non-magnetic metals, or ferromagnetic materials with extremely small mass are left behind. Many of these objects are made of non-metal or non-magnetic metal, and therefore, these objects 6 are transported through the non-magnetic outer drum 1 and within the magnetic influence range of the inner magnetic pole rotor 5 due to the conveyor belt 3 running. When the object 6 comes to the conveyor belt 3, it is naturally attracted and attracted to the conveyor belt 3, but since the internal magnetic pole rotor 5 and the non-magnetic outer drum 1 are coaxial, the object 6 to be processed is Below the top pulley 1, until it is forcibly separated from the conveyor belt 3, the same attraction force as during magnetic attraction and attraction is acting.
Moreover, an internal magnetic pole rotor 5 inside the non-magnetic outer drum 1
Because the workpiece 6 receives an extremely high frequency alternating magnetic field from the arrangement of the magnetic poles or magnets 5□, the workpiece 6 repeatedly vibrates and reverses on the surface of the conveyor belt 3, making it extremely difficult to remove it at the release position. Such a phenomenon, in turn, results in damage to the conveyor belt 3 and shortens the life of the conveyor belt 3.

SUMMARY OF THE INVENTION Therefore, the present invention solves the problems in conventional rotary drum type non-magnetic metal separation apparatuses, such as that it is very difficult to remove the processed material from the conveyor belt and that the conveyor belt is damaged. To obtain an improved rotating drum type non-magnetic metal separation device that can
This is the issue to be addressed.

In order to solve this problem, the present invention has developed a rotary drum type non-magnetic metal separation apparatus of this type, which is based on the basic principle that non-magnetic metals are contained in the material to be processed, which is conveyed by a conveyor belt, as described above. Near the top of the non-magnetic outer drum, the magnetic metal is instantaneously subjected to a strong alternating magnetic field via the non-magnetic outer drum and the conveyor belt by the internal magnetic pole rotor rotating inside the drum, causing it to act as an electrical conductor. The generation of eddy current generates repulsive force in the centrifugal direction, and at the same time, due to the synergistic effect with the rotating magnetic field generated by the rotation of the internal magnetic pole rotor, the material is accelerated in the forward direction, changing the falling trajectory with respect to the non-metallic objects in the object to be processed. However, the effective range of the magnetic field for accelerating non-magnetic metals is limited to a small area around the top of the drum where the conveyor belt contacts the outer periphery of the non-magnetic outer drum. In other words, if the magnetic field always exists only around the top of the drum, the original separation function will be satisfied.In the present invention, different magnetic poles are arranged alternately on the circumferential surface. The axis of the rotation axis of the inner magnetic pole rotor, in which a large number of magnetic poles are arranged, and the axis of rotation of the non-magnetic outer drum are placed in the same vertical plane, although they are parallel to each other. It is supported by a shaft structure placed eccentrically below the former, without impairing the magnetic field at the top of the non-magnetic outer drum, and weakening the harmful magnetic field at the outer periphery of other non-magnetic outer drums. Alternatively, it is characterized in that by eliminating the magnetic field, a magnetic object that is magnetically attached to and attracted to the surface of the conveyor belt can be easily separated from the conveyor belt.

In order to implement this, specifically, in the present invention, each bearing of the rotating shaft of the internal magnetic pole rotor and the rotating shaft of the non-magnetic outer drum rotating around the outer periphery is A substantially cylindrical fixing sleeve arranged in the direction of the axis of the apparatus is provided eccentrically inside and outside, respectively, and the fixing sleeve is attached to the apparatus pedestal via a bearing pedestal.

D-5-1 Hereinafter, the present invention will be described in detail based on FIGS. 1 and 2 of the accompanying drawings showing one embodiment thereof. In these drawings, similar members to those in the device shown in FIG. 3 are given the same reference numerals.

First, the overall arrangement of this embodiment is substantially the same as that of the conventional structure shown in FIG. 3, but the arrangement shown in FIG. The difference is in the bearing structure of the rotating shaft of the child 5.

That is, as shown in FIGS. 1 and 2 (FIG. 1 is a longitudinal sectional view showing approximately half of the top pulley 1 of the device according to this embodiment, and FIG. 2 is a side view thereof), In the embodiment, an internal magnetic pole rotor 5 in which a large number of magnetic poles N and S are arranged alternately on an outer cylindrical surface is fixed to its rotating shaft 11 and arranged horizontally. 11 is an inner pole rotor bearing that passes through an inner hole of a substantially cylindrical fixed sleeve 12 arranged in the direction of its axis X-X, and is installed in the inner hole near its outer end. It is rotatably supported via 13. In this case, the axis X2 of the central axis of this cylindrical fixed sleeve 12
X2 is the axis X- of the rotating shaft 11 of the internal magnetic pole rotor 5
It is located in a vertical plane containing X, parallel to the axis X, -X, but at a distance d below it. The fixed sleeve 12 itself is supported near its outer end by a bearing pedestal 14 formed so as to surround it, and this bearing pedestal 14 is a rotary drum non-magnetic roller according to the present invention. It is adapted to be attached to the apparatus frame of the metal separation apparatus by appropriate means.

Further, a pulley 15 for driving the rotary shaft 11 of the internal magnetic pole rotor 5 is fixed to the outer end thereof, and a V-belt (not shown) is similarly driven by a drive motor (not shown). It is designed to be rotationally driven through.

On the other hand, a disk-shaped flange bearing housing 20 is fixed to the end surface of the non-magnetic outer drum 1 housing the internal magnetic pole rotor 5 at its outer periphery, and protrudes from its center. The boss portion 20. A drum bearing 21 is built into the inside of the rotor, and the drum bearing 21 is fixed to the outer circumferential surface of the fixed sleeve 12 inside the internal magnetic pole rotor bearing 13.

One embodiment of the present invention has such a configuration, and the internal magnetic pole rotor 5 is driven by a V-belt (not shown) via a rotating shaft 11 by a drive pulley 15 fixed to its outer end. For example, the tail pulley 2 (FIG. 3) is rotated by a motor (also not shown) via a motor (also not shown), and the non-magnetic outer drum l is ．． (FIG. 3), the conveyor belt 3 is rotated.

In this case, the axes X, -X of the rotating shaft 11 of the internal magnetic pole rotor 5 rotationally driven by the rotating shaft 11 via the pulley 15
, and the axis X2-X2 of the rotating shaft of the non-magnetic outer drum 1 which is rotationally driven via the conveyor belt 3, there is an eccentricity of a distance d. The rotation axis 11 of the internal magnetic pole rotor 5 on the circumferential surface of the cylindrical drum 1
The distance between the magnetic poles N or S of the inner magnetic pole rotor 5 and the conveyor belt 3 is minimum when the inner magnetic pole rotor 5 reaches the position corresponding to the top in the vertical plane containing the axis X141 of However, when the conveyor belt 3 passes the top of the non-magnetic outer drum 1 as it rotates, the conveyor belt 3 and internal magnetic pole rotor 5
The distance from the surrounding magnetic poles N or S gradually increases, and therefore the magnetic field that the workpiece 6 on the conveyor belt 3 receives from the magnetic poles N or S of the internal magnetic pole rotor 5 gradually becomes smaller. When the lowermost position in the vertical plane including the axis X5-Xi of the non-magnetic outer drum 1 is reached, the magnetic field becomes even smaller, and from then on, it leaves the influence of the magnetic field.

In this way, according to the present invention, ferromagnetic materials that may be contained in the material to be processed 6 can be removed from the conveyor belt 3, which has been a problem in conventional rotary drum type non-magnetic metal separators. It becomes possible to make withdrawal easier,
Furthermore, damage to the conveyor belt 3 can be effectively prevented.

light! Since the present invention has the above-described structure and function, it solves the problems in the conventional rotary drum type non-magnetic metal separation apparatus and prevents the metal from being mixed into the processed material. It has the effect of easily separating certain ferromagnetic materials, thus improving its separation ability, reducing damage or wear on the conveyor belt, and significantly increasing its durability.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a non-magnetic outer drum showing one embodiment of the device of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a conventionally known rotary drum-type non-magnetic metal drum. 1 is a schematic layout diagram showing an example of a device. 1...Top pulley, 2...Tail pulley, 3...
・Conveyor belt, 5... Internal magnetic pole rotor, 52...
- Magnet, 6... Workpiece, 11... Magnetic pole rotor rotating shaft, 12... Fixed sleeve, 13... Bearing for internal magnetic pole rotor, 14... Bearing stand, 20... Flange bearing housing, 20°...Boss part, 21...
・Bearings for drums.

Claims (1)

[Claims] 1. It consists of a conveyor belt mechanism composed of a non-magnetic outer drum, an end pulley, and an endless conveyor belt that is wound around these and runs continuously. Inside the non-magnetic outer drum, a cylindrical internal magnetic pole rotor is rotated, in which a large number of magnets (5_2) having outer circumferential surfaces close to the inner circumferential surface are installed so that different polarities alternate. In a rotary drum-type non-magnetic metal separation device that is freely arranged, the axis of the rotation axis of the non-magnetic outer drum and the axis of the rotation axis of the inner magnetic pole rotor are parallel to each other in the same vertical plane. However, a rotating drum type non-magnetic metal separation device characterized in that the former is arranged eccentrically downward by a certain distance from the latter. 2. The bearings for the rotating shaft of the internal magnetic pole rotor and the rotating shaft of the non-magnetic outer drum rotating around its outer periphery are mounted inside a substantially cylindrical fixed sleeve arranged in the direction of the axis of these rotating shafts. 2. The rotary drum type non-magnetic metal separating apparatus according to claim 1, wherein the rotary drum type non-magnetic metal separating apparatus is provided eccentrically at the upper and outer sides thereof, and the fixed sleeve is attached to the apparatus frame via a bearing frame.