JP6912911B2 - Magnet filter - Google Patents

Description

The present invention relates to a magnet filter that removes metal powder.

Conventionally, as a magnet filter of this type, a magnet filter having a bar magnet at the center of a tubular case through which a fluid passes is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2015-36136 (Fig. 1, paragraph [0020])

However, in the above-mentioned conventional magnet filter, there is a problem that the removal efficiency of metal powder is low.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a magnet filter capable of removing metal powder more efficiently than before.

The invention of claim 1 made to achieve the above object includes a cage-shaped structure provided with a plurality of rod-shaped members arranged in an annular shape, and the cage-shaped structure included in the plurality of rod-shaped members. A plurality of bar magnets that are dispersedly arranged one by one at a plurality of positions in the circumferential direction and that are polarized in the circumferential direction and attract each other, and the bar magnets that are included in the plurality of rod-shaped members and are adjacent to each other in the circumferential direction. and arranged at intervals are provided in plurality, neighboring the rod constitutes a part of the magnetic path between the magnets between and said narrower than the bar magnet non magnetized a plurality of bar-shaped magnetic material between said plurality An annular member, which is a ring-shaped non-magnetic material, to which the bar magnet is fixed to the inner side surface, and an annular member, which is vertically fixed between the rod-shaped magnets on the inner surface of the annular member, and both ends are side surfaces of the bar magnet. A plurality of arc-shaped non-magnetic members which are abutted against each other and a plurality of rod-shaped magnetic bodies are fixed to the inner side surface, a case for accommodating the basket-shaped structure, and a case provided in the case from the outside. An inflow portion for allowing the fluid to flow into the case and a fluid provided in the case and flowing into the case from the inflow portion pass between the rod-shaped members and flow out from the case. It is a magnet filter having an outflow portion arranged in.

The invention of claim 2 is the magnet filter according to claim 1 , wherein the cage-shaped structure has a conical shape.

The invention according to claim 3 is described in claim 1 or 2, wherein the annular member and the arc member are made of austenitic stainless steel, while the rod-shaped magnetic material is made of ferritic stainless steel or two-phase stainless steel. It is a magnet filter of.

The invention of claim 4, wherein the bar magnet, Ri Na accommodates a plurality of block-shaped magnet square pipe is austenitic stainless steel, said plurality of bar magnets are welded or brazed to the annular member, the The magnet filter according to claim 3 , wherein the plurality of rod-shaped magnetic materials are welded or brazed to the arc member.

The invention of claim 5 is the magnet filter according to claim 1, further comprising a bag-shaped cloth filter that covers the inside or the outside of the cage-shaped structure.

[Invention of claim 1]
The magnet filter according to claim 1 has a cage-shaped structure in a case in which a plurality of rod-shaped members are arranged in an annular shape. Then, the fluid flowing into the case passes between the rod-shaped members and flows out of the case. Here, since the plurality of rod-shaped members include a plurality of rod magnets that are dispersedly arranged in the circumferential direction of the cage-shaped structure and that are polarized in the circumferential direction and attract each other, they are formed in an annular shape in which the magnetic field is closed. The spread of magnetic flux is suppressed. Further, since the plurality of rod-shaped members include a plurality of rod-shaped magnetic materials arranged between the bar magnets, the spread of the magnetic flux is also suppressed by this. As a result, the magnetic force of the magnetic field formed in the portion through which the fluid passes can be strengthened, and the metal powder can be removed more efficiently than before.

Further, according to the magnet filter of the present invention, since the annular member and the arc member that hold the plurality of rod-shaped members in an annular state are non-magnetic materials , the annular member and the arc member are magnetic paths. This can be prevented and the strength of the magnetic field between the rod-shaped members can be increased.

[Invention of claims 3 and 4]
In the magnet filters of claims 3 and 4, since the annular member, the arc member, the square pipe and the rod-shaped magnetic material are made of stainless steel, corrosion can be prevented.

[Invention of claim 5]
According to the magnet filter of claim 5, non-magnetic foreign matter can be removed by a bag-shaped cloth filter.

Side sectional view of the magnet filter according to the first embodiment of the present invention. Perspective view of the cage-shaped structure Partial plan cross section of squirrel-cage structure Perspective view of the magnet filter of the second embodiment Perspective view of the magnet filter of the third embodiment

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the magnet filter 10 of the present embodiment accommodates a cage-shaped structure 20 and a cloth filter 19 inside a case 11.

The case 11 has a structure in which, for example, a pair of hemispheres 13 and 13 are provided at both ends of the cylindrical portion 12, and one hemisphere 13 (hereinafter, appropriately referred to as “cover side hemisphere 13”) and the other hemispheres 13 It is divided into a case body 14 and the case body 14. Each of the case body 14 and the hemispherical portion 13 on the lid side is provided with flanges 15 and 15 projecting laterally from the boundary portion, and a plurality of flanges 15 and 15 (not shown) with the packing 11P sandwiched between them. It is fixed with bolts and nuts.

Connection pipes 13P and 13P extend outward from the pair of hemisphere portions 13 and 13, and connection flanges 13F and 13F are provided at the tips of the connection pipes 13P and 13P. Further, the connecting pipe 13P of the hemispherical portion 13 on the lid side forms the "inflow portion" according to the present invention, and the connecting pipe 13P on the case body 14 side forms the "outflow portion" according to the present invention.

The cloth filter 19 is composed of a cylindrical cloth bag 19A having a bottom having a length substantially the same as that of the cylindrical portion 12 and an annular flange 19F, and the open end of the cloth bag 19A is fixed to the inner edge of the flange 19F. Has been done.

The case 11 and the cloth filter 19 described above are made of a non-magnetic material. Specifically, the flange 19F of the case 11 and the cloth filter 19 is made of, for example, austenitic stainless steel (for example, SUS304, SUS201), the packing 11P is made of resin, and the cloth bag 19A of the cloth filter 19 is made of resin fiber. Has been done.

As shown in FIG. 2, the cage-shaped structure 20 includes a plurality of square pipes 22 extending in the vertical direction and a plurality of rod members 25 arranged in an annular shape, and is supported by the plurality of annular members 21. The square pipe 22 and the rod member 25 have substantially the same axial length as the cylindrical portion 12 of the case 11. The annular member 21 is, for example, a strip member rolled into a circle and arranged at a plurality of positions in the vertical direction including the upper end portion and the lower end portion of the square pipe 22 and the rod member 25. Further, the flange 21F projects laterally from the annular member 21 at the upper end. Further, the lower surface of the annular member 21 at the lower end is closed by the bottom plate 28.

The square pipe 22 has, for example, a square cross section. Then, welding or brazing is performed in a state where one side surface of the square pipe 22 is addressed to a position where the inner peripheral surface of each annular member 21 is evenly divided into a plurality of equal parts (12 equal parts in the examples of FIGS. 2 and 3). ing. Further, the upper end opening and the lower end opening of the square pipe 22 are brazed in a state where the block-shaped lid 25C (see FIG. 2) is fitted, and the internal space of the arc member 23 is sealed in a watertight state. Further, as shown in FIG. 3, a state in which, for example, an arc member 23 having the same thickness and width as the annular member 21 is overlapped between adjacent square pipes 22 and 22 on the inner surface of each annular member 21. Both ends of each arc member 23 are abutted against the side surface of the square pipe 22.

The rod member 25 has, for example, a circular cross section, and is welded or brazed with its side surface addressed to a position that evenly divides between the square pipes 22 and 22 on the inner surface of the arc member 23. The central portions of the plurality of square pipes 22 and the central portions of the plurality of rod members 25 are located on substantially the same imaginary circle.

The rod member 25 corresponds to the "rod-shaped magnetic material" according to the present invention, and is, for example, ferritic stainless steel (for example, SUS430, SUS405), duplex stainless steel (SUS329J1, SUS329J4L), or a magnetic martensitic stainless steel. It is made of stainless steel (SUS420J2, SUS410, SUS403). In the following description, the rod member 25 will be referred to as a “rod-shaped magnetic material 25”.

Further, all the parts of the cage-shaped structure 20 described above except the rod-shaped magnetic body 25 are made of a non-magnetic material. Specifically, the above-mentioned square pipe 22, block-shaped lid 25C, annular member 21, bottom plate 28, and arc member 23 are made of austenitic stainless steel (for example, SUS304, SUS201). Further, in the present embodiment, the "holding member" according to the present invention is composed of the annular member 21 and the arc member 23.

A plurality of block-shaped magnets 24 are stacked and housed in each square pipe 22, and a bar magnet 26 is composed of each square pipe 22 and a plurality of block-shaped magnets 24 inside the square pipe 22. Specifically, the block-shaped magnet 24 is, for example, a neodymium magnet, and has a quadrangular shape whose plane shape is substantially the same as the inner plane shape of the square pipe 22. Then, the block-shaped magnets 24 are polarized in the circumferential direction of the annular member 21. Specifically, each block-shaped magnet 24 is polarized so that when the cage-shaped structure 20 is viewed from above, the front side in the clockwise direction has an S pole and the rear side has an N pole.

The cage-shaped structure 20 is housed inside the cloth filter 19, and the cloth filter 19 and the flanges 19F and 21F of the cage-shaped structure 20 are overlapped with each other and sandwiched between the flanges 15 and 15 of the case 11. There is. As a result, the cloth filter 19 and the cage-shaped structure 20 are fixed in the case 11, and the cloth filter 19 and the cage-shaped structure 20 are arranged inside the case 11 away from the inner surface.

This concludes the description of the configuration of the magnet filter 10 of the present embodiment. Next, the action and effect of the magnet filter 10 will be described. The magnet filter 10 is connected in the middle of a pipe through which a fluid such as a cleaning liquid or an electrodeposition coating liquid used for an automobile part flows. Then, the fluid flowing into the hemispherical portion 13 on the lid side of the magnet filter 10 (the upper hemispherical portion 13 in FIG. 1) flows between the bar magnet 26 and the bar magnetic body 25 from the inside of the basket-shaped structure 20 or the bar magnetism. It passes between the bodies 25 and 25, faces the outside of the cage-shaped structure 20, passes through the cloth filter 19, and flows out from the other end of the magnet filter 10. When the fluid contains metal powder which is a magnetic substance, it is adsorbed on the bar magnet 26 or the bar-shaped magnetic body 25 and removed from the fluid. If the fluid contains foreign matter other than metal powder or non-magnetic metal powder, it is removed from the fluid by the cloth filter 19.

Here, the plurality of bar magnets 26 described above are arranged in an annular shape along the annular member 21 and polarized so as to have NS poles in the same direction in the circumferential direction thereof. As a result, a tubular magnetic field is formed in the entire cage-shaped structure 20. That is, a closed annular magnetic path is formed, the spread of the magnetic flux is suppressed, and a magnetic field having a high magnetic flux density (that is, a strong magnetic force) is formed. Moreover, since a plurality of rod-shaped magnetic bodies 25 are provided between the adjacent bar magnets 26 and 26, the rod-shaped magnetic bodies 25 serve as relay points for the magnetic flux, and this also spreads the magnetic flux. Is suppressed, and a magnetic field with a strong magnetic force is formed. Furthermore, since the annular member 21 and the case 11 that support the rod magnet 26 and the rod-shaped magnetic body 25 are made of a non-magnetic material, it is regulated that a magnetic path is formed along the annular member 21 and the like. NS. As a result, in the magnet filter 10 of the present embodiment, the magnetic force of the magnetic field formed in the portion through which the fluid passes can be strengthened, and the metal powder can be removed more efficiently than before.

[Second Embodiment]
FIG. 4 shows the cage-shaped structure 20V of the present embodiment. The cage-shaped structure 20V has a tapered shape in which the diameter of the cage-shaped structure 20 of the first embodiment is reduced downward. Then, for example, it is used in a state of being housed in the case 11 of the first embodiment. The present embodiment also has the same effect as that of the first embodiment.

[Third Embodiment]
FIG. 5 shows the magnet filter 10W of this embodiment. The cage-shaped structure 20W of the magnet filter 10W has a structure in which the cylindrical cage-shaped structure 20 of the first embodiment is deformed into a square cylinder. Specifically, the cage-shaped structure 20W is provided with a pair of annular members 33, 33 formed by winding a non-magnetic strip member in a rectangular annular shape (that is, a frame shape). Then, the plurality of bar magnets 26 described in the first embodiment are welded or brazed to a plurality of positions of the annular member 33 excluding both ends of the pair of long sides and the center of the pair of short sides. At the same time, a plurality of rod-shaped magnetic bodies 25 are arranged at a plurality of positions including the corners of the annular member 33. Further, the bar magnet 26 is polarized so as to have NS poles in the same direction in the circumferential direction of the annular member 33. As a result, a tubular magnetic field along the circumferential direction of the annular member 33 is also formed in the cage-shaped structure 20W.

Further, the case 30 of the magnet filter 10W has a box shape in which the basket-shaped structure 20W can be accommodated. Then, the connecting pipes 31 and 31 project outward from the pair of facing walls facing each other in the short side direction of the annular member 33 in the case 30, and the flanges 32 and 32 are attached to the tips of the connecting pipes 31 and 31. I have.

Even with the magnet filter 10W of the present embodiment, the magnetic force of the magnetic field formed in the portion through which the fluid passes can be strengthened, and since the fluid passes through the magnetic field twice, the metal powder can be more efficiently produced than before. Can be removed.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. It can be changed and implemented.

(1) In the first embodiment, stainless steel is used as both the magnetic material and the non-magnetic material, but a metal other than stainless steel, a resin, ceramics, or the like may be used as the magnetic material or the non-magnetic material.

(2) The magnet filter according to the present invention may be used, for example, in a manufacturing facility in which a fluid for beverages or food flows.

(3) From the case 30 of the third embodiment, the pair of facing walls provided with the pair of connecting pipes 31 and 31 is eliminated to form the case 30 in the shape of a square tube with both ends open, which is abbreviated as the square tube. The case 30 may be attached as a part of the duct in the middle of the duct having the same cross section.

(4) Although it does not belong to the technical scope of the present invention, for example, the rod-shaped magnetic body 25 is excluded from the cage-shaped structures 20, 20V, 20W of the first to third embodiments, and only a plurality of rod magnets 26 are removed. May be arranged in a ring shape to form a cage-shaped structure 20. Even with such a configuration, a closed annular magnetic path is formed, the spread of the magnetic flux is suppressed, a magnetic field having a high magnetic flux density (that is, a strong magnetic force) can be formed, and metal powder can be removed more efficiently than before. can do.

10,10W Magnet filter 11,30 Case 19 Cloth filter 20,20V, 20W Squirrel-cage structure 21,33 Ring member (holding member)
22 Square pipe 23 Arc member (holding member)
24 Block magnet 25 Bar magnet 26 Bar magnet

Claims (5)

A cage-shaped structure that provides a state in which a plurality of rod-shaped members are arranged in an annular shape,
A plurality of bar magnets included in the plurality of rod-shaped members, one of which is dispersedly arranged at a plurality of positions in the circumferential direction of the cage-shaped structure, and a plurality of bar magnets which are polarized in the circumferential direction and attract each other.
A plurality of the rod-shaped members included in the plurality of rod-shaped members are arranged with a space between the rod magnets adjacent to each other in the circumferential direction, and form a part of a magnetic path between the rod magnets adjacent to each other. And a plurality of non-magnetized rod-shaped magnetic materials thinner than the rod magnet,
An annular member, which is a ring-shaped non-magnetic material to which the plurality of bar magnets are fixed to the inner side surface,
Of the inner side surface of the annular member, the arc-shaped non-magnetic material is fixed so as to be overlapped between the rod-shaped magnets, both ends of which are abutted against the side surface of the rod-shaped magnet, and a plurality of rod-shaped magnetic materials are fixed to the inner surface. With multiple arc members that are the body,
A case for accommodating the cage-shaped structure and
An inflow portion provided in the case for allowing a fluid to flow into the case from the outside,
A magnet filter provided in the case and having an outflow portion arranged so that a fluid flowing into the case from the inflow portion passes between the rod-shaped members and flows out from the case. The magnet filter according to claim 1, wherein the cage-shaped structure has a conical shape. While the annular member and the arc member are made of austenitic stainless steel,
The magnet filter according to claim 1 or 2, wherein the rod-shaped magnetic material is made of ferritic stainless steel or duplex stainless steel. It said bar magnet, Ri Na accommodates a plurality of block-shaped magnet square pipe is austenitic stainless steel,
The magnet filter according to claim 3 , wherein the plurality of bar magnets are welded or brazed to the annular member, and the plurality of bar- shaped magnetic materials are welded or brazed to the arc member. The magnet filter according to any one of claims 1 to 4, further comprising a bag-shaped cloth filter that covers the inside or the outside of the cage-shaped structure.

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