JP2883529B2 - Non-magnetic metal sorting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-magnetic metal sorting apparatus for separating and collecting non-magnetic metal from municipal solid waste or bulky waste.

[0002]

2. Description of the Related Art Municipal garbage, oversized garbage, automobile scraps and the like are crushed into small pieces to some extent in order to separate and collect the garbage, the magnetic material is first removed by a magnetic separator, and then sorted by an aluminum sorting device. . The aluminum sorting apparatus generally has an endless belt conveyor stretched between a pair of rotating rollers provided at a predetermined interval, and a downstream rotating roller has a permanent magnet having an N pole and an S pole inside thereof. There is provided a magnetic drum in which magnets are alternately arranged along a depth of a predetermined thickness from the circumferential surface.

[0003] The permanent magnet is made of a rare earth magnet, has a strong magnetic flux density, and rotates this magnetic drum at a high speed by a motor to select aluminum from refuse carried by a belt conveyor. Most of the magnetic material such as iron is removed from the refuse introduced upstream of the belt conveyor by a magnetic separator in advance, but a small amount of iron remains and other non-magnetic metals such as aluminum are included. And inflammables such as wood chips and plastics.

[0004] When these refuse are put into an aluminum sorting apparatus, they are sent downstream at high speed by a belt conveyor and dropped from the conveyor at the feed speed. At this time, a discharge portion is provided from directly below the downstream roller to the rear thereof, and the refuse is sorted and sorted according to the above three types of properties. That is, if iron or the like is contained, it is carried to the lower portion of the roller while being attracted to the magnetic drum, and falls from the belt conveyor at a position where the influence of magnetism is weakened.

[0005] Combustible materials and non-combustible materials other than metal fall at a speed fed by a belt conveyor irrespective of the magnetism of the magnetic drum. As for non-magnetic metals such as aluminum, when the magnet approaches the magnetic drum on the belt conveyor, the moving magnetic field generated by rotation of the magnets of different polarity described above generates an induced electromotive force due to eddy current inside it, and the repulsive force due to this is reduced. It acts and is made to fly farther from the magnetic drum than the combustible or non-combustible materials.

[0006] This property is used to sort non-magnetic metal such as aluminum. In this case, generally, the sorted garbage is placed at the boundary of the discharge part so that at least the non-magnetic metal is separated from other substances. A partition plate is provided on a chevron partition provided in the vicinity. By changing the position of the apex (partition point) of the partition plate, a non-magnetic metal such as aluminum and the like and other debris falling in a parabola are separated from other debris. Having.

As a conventional example of this partition plate, a rotary shaft is provided at the top of a chevron-shaped partition portion, and the partition plate attached to the rotary shaft is tilted slightly from a vertical direction toward a roller so that its angle can be adjusted. . The rotation shaft is rotatably fixedly supported. As another method, there is known a type in which a rotating shaft that is horizontally movable at a predetermined height position from the mountain-shaped partition portion is provided, and a partition plate that hangs downward from the rotary shaft is leaned obliquely on the mountain-shaped partition portion. ing.

[0008]

However, none of the above-mentioned types of conventional partition plates is sufficient to accurately sort non-magnetic metals which are to be flown at slightly different flight distances in any case. . In the above non-magnetic metal, even if it is the same non-magnetic metal, there are various variations in the size and specific gravity, and generally, those having a large shape and a light specific gravity are thrown away, and those having a small and heavy shape are far away. Do not fly.

Therefore, depending on the crushed state,
Some non-metallic metals and other combustible waste and non-combustible waste fall along a locus close to the falling position, and there is a problem that it is impossible to accurately sort them out using a conventional partition plate type.

[0010] Further, in any of the above two conventional partition plate types, if the non-magnetic metal falling down along the locus of the limit is to be accurately selected, the inclination (angle of repose) of the partition plate becomes large, and as a result, it becomes oblique. Nonmagnetic metal adheres and accumulates on the inclined partition plate, and when the amount of accumulation increases, it must be removed. Since the operation of the sorting device is stopped and the removal operation is performed, the operation efficiency is reduced.

The present invention takes into account the above-mentioned problems associated with the partition plate of the conventional non-magnetic metal sorting apparatus, and changes the position of the vertex of the partition plate according to the type of non-magnetic metal. The metal can be sorted accurately, and the inclination of the partition plate with respect to the set top position of the partition plate is made as small as possible to prevent non-magnetic metal from adhering and accumulating on the spine of the partition plate, thereby improving work efficiency. It is an object to provide a good sorting device.

[0012]

According to the present invention, as a means for solving the above-mentioned problems, a belt is stretched between a pair of rollers provided at a predetermined interval, and permanent magnets having different polarities are provided inside the downstream rollers. A belt conveyor provided along the peripheral surface, and a discharge unit for receiving and removing at least a non-magnetic metal and other sorted garbage at a partition part below the downstream side,
The partition portion is a non-magnetic metal sorting device in which a partition plate is fixed to a horizontal shaft rotatably supported and the horizontal shaft is vertically movably mounted.

[0013]

According to the sorting apparatus of the invention having the above-described structure,
The position of the vertex (partition point) of the partition plate can be changed so that the non-magnetic metal falling along the limit trajectory can be accurately selected according to the type, shape, size, etc. of the non-magnetic metal,
Further, the inclination (angle of repose) of the partition plate with respect to the set partition point is made as small as possible to prevent the nonmagnetic metal from adhering and accumulating.

Since the partition plate is fixed to a horizontal axis and the horizontal axis is rotatable, the inclination of the partition plate is adjusted by rotating the horizontal axis. At this time, the horizontal axis can be moved up and down freely, so that the partition plate can be moved up and down with various inclinations. Therefore, the position of the partition point of the partition plate can be set arbitrarily.

When the partitioning point is set for the non-magnetic metal of the locus of the limit, the inclination angle (repose angle) formed when the horizontal axis is set by the conventional partitioning plate which cannot move up and down as in the present invention. When the horizontal axis is freely movable up and down and a partition point is set for a non-magnetic metal having the same locus at a position lower than the conventional horizontal axis, the angle of repose in that case is smaller in the present invention. Therefore, the nonmagnetic metal does not adhere to or accumulate on the partition plate, and the sorting operation is performed efficiently.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic view of a non-magnetic metal sorting apparatus of an embodiment, and FIG. 2 is an enlarged sectional view of a main part of a partition. The refuse G supplied from the charging port 1 is sent at a predetermined speed by the belt conveyor 2, and the refuse is dropped at the downstream end.

The belt conveyor 2 is made up of a pair of rotating rollers 3 provided at a predetermined interval and having an endless belt 4 stretched between them. A scraper 5 is mounted on the outer surface of the belt at a predetermined pitch. A magnetic drum 6 is provided in the rotating roller 3 on the downstream side, which will be described later. The rotating roller is driven to rotate by a motor 8 via another belt 7.

A discharge section 10 having a partition section 9 is provided over a predetermined locus from directly below the downstream rotating roller 3. The details and the magnetic drum 6 will be described with reference to FIGS. The partition part 9 is composed of a partition plate 91 having a thin triangular cross section and a rotatably supported horizontal shaft 92 to which the partition plate 91 is fixed. Closing plate 93 is provided.

As shown in FIG. 2, the partition portion 9 is provided above the mountain-shaped partition portion 11 having a triangular cross section and fixed to the discharge portion 10 so that the height of the partition portion 9 can be adjusted.
The discharge unit 10 is provided with two discharge ports 12 so that at least two types of dust can be discharged from the partition 9. The closing plate 93 closes a gap between the chevron partition 11 that partitions between the discharge ports 12 and the horizontal shaft 92.

As an example in which the height of the partition 9 can be adjusted, a vertical screw shaft 94b is rotatably attached to a support box 94a provided at both ends of a horizontal shaft 92, and the upper portion thereof is supported by a support plate 94c. We support in. Support plate 9
4c is fixed to a case side wall (not shown). When the upper end of the screw shaft 94b is rotated by the ratchet 95, the support box 94a moves up and down, whereby the horizontal shaft 92 can be set at a desired height position.

The magnetic drum 6 is made of N
The permanent magnets having different polarities of a pole and an S pole are alternately arranged along the circumferential direction near the peripheral surface of the rotating roller 3,
Permanent magnets made of rare-earth magnets having a high magnetic flux density are used.

The sorting device of the embodiment having the above-described configuration, in particular, the sorting operation by the partitioning portion is as follows. As described in the conventional example, the refuse G sent out by the belt conveyor 2 is roughly divided into a magnetic material (iron), a non-magnetic metal, and other (combustible material, non-combustible material). the a _3, a ₁ ~A _2, and a ₀ (see FIG. 2).

The trajectory A ₁ is a non-magnetic metal having a small shape and a large specific gravity, and A ₂ is a non-magnetic metal having a large shape and a small specific gravity. As can be seen, the size of those passing through the locus A _1, depending on the specific gravity, the trajectory A ₀ side of the others,
Or it will be due to the A ₂ side opposite. Then, the non-magnetic metal and other materials are surely selected by finely adjusting the inclination of the partition plate 91 of the partition portion 9. The partition plate 91 of this embodiment is moved by moving the horizontal shaft 92 up and down. The set position of the tip of the plate 91 can be changed.

It is important to finely adjust the non-magnetic metal near its limit so that the non-magnetic metal can be sorted without fail.
The position at which the tip of 1 is set (the set point is referred to as a partition point), and the inclination (repose angle) of the partition plate 91 with respect to the partition point is set so that non-magnetic metal is not deposited on the partition plate 91. To make it as small as possible.

Now, it is assumed that the general locus of the limit in the figure is A ₁ , which is A ₁ ′ (A ₀₎ depending on the type of nonmagnetic metal.
(Closer) and slightly changed. Partition point B at locus A _{1
If the} horizontal axis 92 cannot move up and down as in the prior art, the partition point must be changed to B ₁ 'for the trajectory A ₁ '. The angle of repose at this time is α.

However, in this embodiment, the horizontal shaft 92 is vertically movable and can be lowered to the position indicated by the dotted line in the figure. Therefore, when the horizontal axis 92 is lowered to the lowest position and changes to the same locus A ₁ ′ as described above, the partition point C ₁ becomes C ₁ ′, and the angle of repose at this time becomes β. This angle of repose β is obviously smaller than the angle of repose α described above. Therefore, it is possible to cope with a change in the locus with a smaller angle of repose than the conventional one,
This prevents non-magnetic metal from adhering and depositing on the surface.

[0027]

As described in detail above, the non-magnetic metal sorting apparatus of the present invention has a permanent magnet for repelling and selecting a non-magnetic metal by an induced electromotive force due to eddy current. A discharge part is provided, and a rotatable and vertically movable partition plate is provided in this discharge part, so that non-magnetic metal falling along a locus of the limit is accurately separated from other waste and discharged to the discharge part, and Since the center of rotation can be moved downward as compared with the conventional partition plate, the inclination of the partition plate is reduced, non-magnetic metal is prevented from adhering and accumulating on the partition plate, and work efficiency is greatly improved. Various advantages are obtained.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of a nonmagnetic metal sorting apparatus according to an embodiment.

FIG. 2 is a partially enlarged cross-sectional view of the vicinity of a partition part of the above.

FIG. 3 is an enlarged perspective view of a detailed configuration of the partition plate of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input port 2 Belt conveyor 3 Rotating roller 4 Belt 5 Scraper 6 Magnetic drum 7 Belt 8 Motor 9 Partition part 10 Discharge part 11 Angled partition part 12 Discharge port

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B03C 1/00-1/30

Claims (2)

(57) [Claims] 1. A belt conveyor having a pair of rollers provided at a predetermined interval and a belt conveyed between the pair of rollers, and permanent magnets of different polarities provided along the peripheral surface inside the downstream rollers;
A discharge unit for removing receiving waste that is sorted in at least a non-magnetic metal and other at the downstream side downward partition portion, co if the partition portion is fixed to the partition plate in a horizontal shaft which is rotatably supported, water A non-magnetic metal sorting device with a flat shaft mounted vertically. 2. A closing plate rotatably attached to the horizontal shaft, wherein the closing plate closes a gap between the horizontal shaft and a chevron-shaped partition portion that partitions between a plurality of discharge ports of a discharge portion. The non-magnetic metal sorting device according to claim 1.