JPH0448945A - Magnetic separator - Google Patents

Abstract

PURPOSE:To enhance the separation efficiency of the suspended magnetic particles by freely rotatably providing a magnet rotor having a permanent magnet to the inside of a separation drum and providing a hopper to the lower part of a notch and integrating this hopper with the separation drum, and communicating one end of the notch with the inlet of liquid and communicating the other end of the notch with the outlet of liquid and providing a conveyor rotor having a projection to the inside of the hopper. CONSTITUTION:A laminar plate 1, an inner cylinder 14 of a separation drum and an external cylinder 15 thereof are fitted in a range of nearly 3/4 of the circumference to the inside of the annular part of the separation drum 3 in a multilayer shape. A magnet rotor 5 is formed by fitting a plurality of permanent magnets 4 to the boss 16 of a polygon. The magnet rotor 5 is freely rotatably provided to the inside of the separation drum 3, rotated and driven in the direction along the flow of liquid in the separation drum 3. A hopper 7 is provided to the lower part of the notch 2 of the external cylinder 15 of the separation drum while surrounding the notch 2. This hopper 7 is integrated with the separation drum 3 to form a liquid-tight vessel 18. A partition plate 9 is provided to the position separated from one end of the notch 2 of the external cylinder 15 so as to partition one part of the space of the hopper 7. A flow path 9 is formed which is communicated with the separation drum 3 from the inlet 10 of liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a magnetic separator that removes magnetic particles such as iron powder suspended in a liquid such as hydraulic oil.

[Prior Art] Conventionally, as an apparatus for this strain, one shown in FIG. 1 has been used. To explain this using the diagram, (a
) is a container, (b) is a magnetic drum rotatably attached to the container (a), (C) is a scraper, (d) is a liquid inlet, (e) is a liquid outlet, (``) is a sludge tank. show.

A liquid in which magnetic particles such as iron powder are suspended flows into the container (a) from the liquid inlet (d) and flows in contact with the lower half of the magnet drum (b), and the suspended magnetic particles are moved by the magnetic force to the container (a). ) are attracted to surfaces. The liquid from which the suspended magnetic particles have been removed flows out from the liquid outlet (e). The magnetic particles attracted to the surface of the magnet drum (b) come out onto the liquid surface as the magnet drum (b) rotates and are removed from the scraper (C).
) and fall into the sludge tank ([).

By the way, in this conventional technique, since the gap between the surface of the magnetic drum (b) and the surface of the container (a) is usually larger than 10 mm, the magnetic drum (
It takes a long time for the suspended magnetic particles far from the surface of the magnetic drum (b) to be attracted to the surface of the magnetic drum (b) by the magnetic force, so some of the suspended magnetic particles are attracted to the surface of the magnetic drum (b) by the magnetic force.
The liquid cannot be completely attracted to the surface of the liquid drum (b) and the liquid exits (e).
It has the disadvantage that it flows out with the liquid. In order to eliminate this drawback, it is conceivable to reduce the gap between the surface of the magnetic drum (b) and the surface of the container (a), but this will result in the drawback that the cross-sectional area of the flow path will become smaller and the processing flow rate will become smaller. .

Furthermore, the scraping method using the scraper (C) has the disadvantage that magnetic particles remain on the surface of the magnetic drum (b) and flow out from the liquid outlet (e).

[Problems to be Solved by the Invention] The present invention has been made in view of the above circumstances, and the problem to be solved by the present invention is to improve the separation efficiency of suspended magnetic particles by magnetic fraction 1flfi. .

[Means for Solving the Problems] In order to solve the above-mentioned problems, the magnetic separator of the present invention includes a separation cylinder inner cylinder, a separation cylinder outer cylinder having a partial notch, and both end surfaces of an annular portion between the two cylinders. Inside a double cylindrical container-shaped separation cylinder made of closing plates, layered plates are arranged in a multilayered manner with a gap of several millimeters or less, and a magnet rotor having a plurality of permanent magnets is rotatable inside the separation cylinder. and a hole surrounding the notch is provided at the bottom of the notch so as to be integrated with the separating barrel, and one end of the notch is connected to a partition plate provided inside the hopper and a side plate of the hopper. The other end of the notch communicates with the liquid outlet through an outlet flow path formed between the hopper and the side plate of the hopper, and a plurality of protrusions are provided inside the hopper. The conveyor rotor is rotatably provided.

[Function] The liquid in which magnetic particles such as iron powder are suspended flows from the liquid inlet through the channel into one end of the separation cylinder, flows along the annular part of the separation cylinder containing the layer plate, and the suspended magnetic particles The suspended magnetic particles are attracted to the surface of the layer plate and the separation cylinder inner cylinder by the magnetic force of the permanent magnet.The gap between the layer plate, the separation cylinder inner cylinder, and the separation cylinder outer cylinder is small, less than a few millimeters, so that the suspended magnetic particles are It is quickly attracted to the surface.

The liquid from which the suspended magnetic particles have been removed flows out from the other end of the separation cylinder through the outlet channel and from the liquid outlet.

The magnetic particles attracted to the surfaces of the layered plates and the separation cylinder are pulled by magnetic force as the magnet rotor rotates along the flow direction, and slide on the surfaces. The magnetic particles attracted to the surface of the layered plate move to the end of the layered plate and are successively attracted to the surface of the inner layered plate, and in this way, the magnetic particles are finally attracted to the surface of the separation cylinder inner cylinder. The particles are collected, slide on the surface, are blocked by the partition plate, accumulate, and are scooped up by the protrusion of the conveyor rotor. Then, when the protrusions move with the rotation of the conveyor rotor and turn substantially sideways, the lumpy magnetic particles separate from the conveyor rotor and settle in the hopper.

[Example] An embodiment of the present invention is shown in FIG.

In Fig. 2, the separation cylinder (3) has a separation cylinder inner cylinder (14).
and a separation barrel outer cylinder (15) with a notch (2) in one part, and a plate (not shown) that closes both end surfaces of the annular part between the two cylinders.
It is shaped like a double cylindrical container.

The layered plate (1) is made into a multilayered structure such that the gap between the one-layered plate (1), the separation cylinder inner cylinder (14), and the separation cylinder outer cylinder (15) is several millimeters or less to form the separation cylinder (3). It is installed at approximately 3/4 of the circumference within the annular portion of the

The magnet rotor (5) has a plurality of permanent magnets (4) as its axis (17).
It is formed by being attached to a polygonal boss (16) having be done.

The hopper (1) has a notch (2) in the separation barrel outer cylinder (15).
) is provided at the bottom of the notch (2) to surround the cutout (2) and forms a liquid-tight container (18) together with the separation barrel (3).

The partition plate (9) is the notch (2) of the separation cylinder outer cylinder (15).
There is a liquid inlet (
10) to form a flow path (9) communicating with the separation cylinder (3).

The other end of the notch (2) of the separation barrel outer cylinder (15) forms an outlet flow path (19) communicating with the liquid outlet (11) between it and the side plate (8) of the hopper (1).

The conveyor rotor (13) has a plurality of protrusions (12) on its outer periphery that extend along the entire length in the axial direction, and there is a distance of 1 mm between the protrusions (12) and the separation cylinder inner cylinder (14) inside the hopper (1). It can be mounted rotatably with a certain amount of clearance.

The conveyor rotor (13) is connected to the side plate of the hopper (1) (
The magnet rotor (5) is driven to rotate in the opposite direction to the magnet rotor (5) by, for example, a motor via a shaft that passes through the magnet rotor (5) and is sealed in a liquid-tight manner.

The conveyor rotor (13) in this embodiment may be replaced by other means, such as a conveyor belt.

Although (20) in FIG. 2 shows a valve for discharging the magnetic particles accumulated in the hopper (1), other means such as a screw pump or the like may also be used.

[Effects of the Invention] As is clear from the above explanation, the present invention has the following effects.

A layered plate is installed in the channel where the magnetic force acts, and the gap between the layered plate, the inner cylinder of the separation cylinder, and the outer cylinder of the separation cylinder is reduced to a few millimeters or less, so that the suspended magnetic particles are quickly absorbed into the layered plate and the separation cylinder. The amount of suspended magnetic particles that are attracted to the surface of the cylinder and therefore flow out from the liquid outlet is extremely small, and since the liquid inlet and the magnetic particle accumulation area are completely separated by a partition plate, the amount of suspended magnetic particles that flow out from the liquid outlet is extremely small. does not return to the flow of the processing liquid, and therefore the separation efficiency of suspended magnetic particles can be improved regardless of the size of the processing flow rate.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a conventional magnetic separator, and FIG. 2 shows an embodiment of the present invention.

Claims (1)

[Claims] A magnet rotor having a plurality of permanent magnets is rotatably provided inside a separation barrel in the form of a double cylindrical container that has a built-in layered plate and has a notch in a portion, and a hopper surrounding the notch is provided at the bottom of the notch. one end of the notch communicates with the liquid inlet through a channel formed by a partition plate provided inside the hopper and a side plate of the hopper, and the other end of the notch communicates with the liquid inlet through a flow path formed by a partition plate provided inside the hopper and a side plate of the hopper 1. A magnetic separator comprising a rotatably provided conveyor rotor which communicates with a liquid outlet through a hopper and has a plurality of protrusions inside the hopper.