JP7671065B2 - Square magnet bar for iron removal - Google Patents

Description

The present invention uses the magnetic force of a permanent magnet to remove iron particles and extremely small magnetic particles scattered in objects to be separated, such as food, raw materials, powders, liquids, and gases, and relates to a device that can be installed in conveying ducts and chutes, in the flow of raw materials, in the flow paths of liquids and gases, and in storage tanks.

Currently, in the industrial world, a magnet bar as shown in FIG. 4 is known for removing iron powder and extremely small magnetic particles that are mixed in objects to be separated, such as food, raw materials, powders, liquids, and gases. Such magnet bars are used in known magnetic separation devices such as those described in Patent Document 1.

A widely used conventional magnet bar as shown in Figure 4 has multiple cylindrical permanent magnets 12 inserted into a non-magnetic cylindrical case (pipe) 11, with a yoke sandwiched between the magnetic force acting surfaces 13 of adjacent permanent magnets 12 that are of the same polarity. A magnetic force is generated from this sandwiched yoke, and as shown in Figure 5, iron powder and extremely small magnetic objects 16 present in the separated object are attracted by the magnetic force of the permanent magnets, and then removed. Also, by placing two or more magnet bars side by side, more magnetic objects 16 can be attracted (Figure 6).

However, this type of magnet bar has the drawback that the side surface 14 of the permanent magnet 12 is present all around, limiting the area of attraction of the magnetic material 16 (iron removal area), making it difficult to efficiently attract the magnetic material, and thus making it difficult to improve iron removal efficiency.

JP 2006-102625 A

The magnet bar of the present invention overcomes the drawbacks of the conventional technology described above by expanding the iron removal range of the magnet bar, thereby evenly attracting more magnetic material from the separated material.

The problem of the present invention is solved by the invention-specific matters described in the claims. That is, in a square magnet bar for iron removal, which consists of a non-magnetic square pipe and multiple square permanent magnets that are stacked and housed in the square pipe, with their magnetic acting surfaces (3) facing the inner surface of the square pipe, the problem is solved by arranging the center lines of the magnetic acting surfaces of adjacent permanent magnets in a twisted position with respect to each other.

According to the present invention, by expanding the iron removal range of the magnet bar, more magnetic material can be evenly attracted from the separated object.

FIG. 1 shows a rectangular magnet bar of the present invention. FIG. 2 shows a magnetic material that is attracted to the rectangular magnet bar of the present invention. FIG. 3 shows a magnetic object attracted to two aligned rectangular magnet bars of the present invention. FIG. 4 shows a conventional magnet bar. FIG. 5 shows a magnetic object being attracted to a conventional magnet bar. FIG. 6 shows a magnetic object being attracted to two conventional magnet bars arranged side by side.

Below, we will explain an embodiment of the square magnet bar for iron removal according to the present invention. Figure 1 shows a square magnet bar for iron removal according to an embodiment of the present invention.

The iron removal square magnet bar is composed of a non-magnetic stainless steel square pipe (1) and multiple square neodymium magnets (2) that are stacked and housed inside the square pipe, with their magnetic action surfaces (3) facing the inner surface of the square pipe. As a result, the action surfaces (3) of the permanent magnets (2) are directly mounted on the surface of the magnet bar, widening the area that acts on the material to be separated. A magnet bar constructed in this way can project magnetic field lines farther than the conventional magnet bar shown in Figure 4, resulting in a wider iron removal range and stronger adhesion and suction forces, which more reliably attract more magnetic material mixed into the material to be separated from all directions.

In this rectangular magnet bar, the center lines of the magnetic action surfaces (3) of adjacent neodymium magnets (2) are positioned so that they are twisted relative to one another, as shown in Figures 1 and 2. This allows the magnetic material (6) in the separated body to be more efficiently attracted across the north and south poles of the adjacent neodymium magnets.

Each neodymium magnet (2) is assembled by rotating its magnetic force acting surface (3) so that its direction changes in 90° increments, and the north and south poles of these assembled neodymium permanent magnets (2) are arranged spirally along the center line of the magnet bar, as shown in Figures 1 and 2. Then, as shown in Figure 2, magnetic objects (6) from each direction are strongly attracted by the square magnet bar. The number of attracted magnetic objects (6) is significantly greater than with the conventional magnet bar shown in Figure 5.

When two or more rectangular magnet bars are used side by side as shown in Figure 3, the magnetic field acts between the north and south poles of adjacent magnet bars, allowing the rectangular magnet bars to attract even more magnetic objects.

The square permanent magnet (2) is shown as a single magnet in Figure 1, but it can also be made up of multiple divided magnets. It is also possible to create a double nested structure by placing non-magnetic pipes on the inside and outside, and to remove the permanent magnet from the outer pipe while keeping it stored in the inner non-magnetic pipe.

1 Non-magnetic square pipe 2 Square permanent magnet 3 Magnetic force acting surface 4 Magnet side surface 6 Magnetic material

Claims (1)

The present invention relates to a square magnet bar for removing iron, the square magnet bar comprising a non-magnetic square pipe (1) and a plurality of square permanent magnets (2) stacked and housed in the square pipe, the magnetic force acting surfaces (3) of which face the inner surface of the square pipe, the center lines of the magnetic force acting surfaces of adjacent permanent magnets (2) being in a twisted position with respect to each other,
The magnets are arranged in a rectangular shape for removing iron, with the magnetic force acting surfaces (3) of the permanent magnets (2) arranged in such a way that their directions change by 90°, and the north and south poles of the permanent magnets (2) are arranged in a spiral shape .

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