Bar-shaped magnet and magnetic foreign matter removing device
阅读说明:本技术 棒状磁铁及磁性异物去除装置 (Bar-shaped magnet and magnetic foreign matter removing device ) 是由 佐藤雅人 于 2018-11-30 设计创作,主要内容包括:本发明提供一种棒状磁铁及磁性异物去除装置。其能够抑制磁性异物的滞留并减少磁性异物的吸附遗漏。磁性异物去除装置(50)具有具备导入口(53)及排出口(55)的壳体(51)和多个棒状磁铁(10),棒状磁铁(10)配置在壳体(51)内并以棒状地延伸规定长度。棒状磁铁(10)具有具备一对吸附面(29、29)的吸附部(30)和引导部(28),从与棒状磁铁(10)的轴向正交的截面看棒状磁铁(10)时,一对吸附面(29、29)相互平行地延伸规定长度,引导部(28)设置在吸附部(30)的一端侧并将磁性异物(M)引导至吸附部(30)。棒状磁铁(10)以隔开规定间隙的方式平行地、且以一端(23)侧朝向粉粒体等的行进方向的状态在壳体(51)内并列配置多个。(The invention provides a bar magnet and a magnetic foreign matter removing device. Which can suppress the retention of magnetic foreign matters and reduce the adsorption omission of the magnetic foreign matters. The magnetic foreign matter removal device (50) has a housing (51) provided with an inlet (53) and an outlet (55), and a plurality of bar-shaped magnets (10), wherein the bar-shaped magnets (10) are arranged in the housing (51) and extend in a bar shape by a predetermined length. The bar magnet (10) has an attracting portion (30) having a pair of attracting surfaces (29, 29), and a guide portion (28), wherein the pair of attracting surfaces (29, 29) extend in parallel to each other by a predetermined length when the bar magnet (10) is viewed from a cross section orthogonal to the axial direction of the bar magnet (10), and the guide portion (28) is provided on one end side of the attracting portion (30) and guides the magnetic foreign matter (M) to the attracting portion (30). The rod-shaped magnets (10) are arranged in parallel with a predetermined gap therebetween, and are arranged in parallel in the housing (51) with one end (23) facing the direction of travel of the powder or granule.)
1. A rod-shaped magnet for attracting a magnetic foreign substance from a powder or granular material or a fluid containing the magnetic foreign substance by a magnetic field, the rod-shaped magnet extending in a rod-like shape by a predetermined length, the rod-shaped magnet having a major axis and a minor axis when the rod-shaped magnet is viewed in a cross section orthogonal to an axial direction of the rod-shaped magnet,
the bar-shaped magnet is characterized in that the bar-shaped magnet is provided with an adsorption part and a guide part, wherein the adsorption part is provided with a pair of adsorption surfaces,
wherein the pair of attracting surfaces extend in parallel with each other by a predetermined length when the bar magnet is viewed in a cross section orthogonal to the axial direction of the bar magnet, and the guide portion is provided at one end side of the attracting portion, has a pair of inclined surfaces gradually widening from the one end side toward the other end side of the long axis, and guides the magnetic foreign matter to the attracting portion.
2. The bar magnet according to claim 1,
and a cover made of a non-magnetic material having a shape suitable for an outer periphery of the bar magnet, the bar magnet being insertable into and removable from the cover.
3. The bar magnet according to claim 1 or 2,
the bar magnet is formed by axially connecting a plurality of magnets, and the bonding surfaces of the magnets constituting the bar magnet are provided with the same polarity.
4. The bar magnet according to claim 3,
the respective bonding surfaces of the magnets constituting the bar-shaped magnet are inclined at a predetermined angle with respect to the axial direction of the bar-shaped magnet and are parallel to each other.
5. A magnetic foreign matter removing device which removes magnetic foreign matter by adsorbing the magnetic foreign matter from a powder or a fluid containing the magnetic foreign matter by a magnetic field,
the magnetic foreign matter removing device is characterized by comprising a housing and a plurality of rod-shaped magnets,
the housing includes an inlet port for introducing the powder or the fluid and an outlet port for discharging the powder or the fluid,
the plurality of bar-shaped magnets are arranged in the housing and extend in a bar shape by a predetermined length, and when the plurality of bar-shaped magnets are viewed from a cross section orthogonal to an axial direction of the plurality of bar-shaped magnets, the plurality of bar-shaped magnets each have a major axis and a minor axis,
the bar-shaped magnet has an attracting portion provided with a pair of attracting surfaces extending in parallel with each other by a predetermined length when the bar-shaped magnet is viewed in a cross section orthogonal to the axial direction of the bar-shaped magnet, and a guide portion provided at one end side of the attracting portion and having a pair of inclined surfaces gradually widening from one end side to the other end side of the long axis to guide the magnetic foreign matter to the attracting portion,
the rod-shaped magnets are arranged in parallel with a predetermined gap therebetween, and a plurality of the rod-shaped magnets are arranged in parallel in the casing with the one end side facing the direction of travel of the powder or granule or fluid.
6. The magnetic foreign material removing apparatus according to claim 5,
in the case, a plurality of covers made of a nonmagnetic material are disposed so as to match the arrangement of the bar-shaped magnets, the plurality of covers being adapted to and covering the outer peripheries of the bar-shaped magnets, and the bar-shaped magnets being insertable into and removable from the corresponding covers.
7. The magnetic foreign material removing apparatus according to claim 5 or 6,
the bar-shaped magnet is formed by connecting a plurality of magnets in the axial direction, and the bonding surfaces of the magnets constituting the bar-shaped magnet are provided with the same poles.
8. The magnetic foreign material removal apparatus according to claim 7,
the respective bonding surfaces of the magnets constituting the bar-shaped magnet are inclined at a predetermined angle with respect to the axial direction of the bar-shaped magnet and are parallel to each other.
9. The magnetic foreign material removal apparatus according to any one of claims 5 to 8,
the rod-shaped magnet is provided such that the one end side faces the rotational direction, is radially coupled to the rotational axis, and is rotatable on the inner periphery of the housing.
Technical Field
The present invention relates to a bar magnet and a magnetic foreign matter removing apparatus for adsorbing and removing magnetic foreign matter from a powder or granule containing the magnetic foreign matter and a fluid.
Background
For example, in the case of a powder or granule constituting a food material such as wheat flour, it is necessary to strictly exclude the mixing of foreign substances. As an apparatus for removing magnetic foreign matter from such powder or granular material, for example, an apparatus having a casing into which the powder or granular material is put and a magnet arranged inside the casing and having a circular cross section is known. When the powder or granule is put into the casing from the upper opening, the magnetic foreign matter M is attracted to the magnet, and thus the magnetic foreign matter M can be removed from the powder or granule.
However, in the case of the above-described device, since the cross section of the magnet is circular, the particles fed from above the housing are accumulated on the upper surface side of the magnet, and there is a problem that the efficiency of adsorption by magnetism is gradually lowered.
In order to solve the above-mentioned problems, patent document 1 describes a pear-shaped bar magnet having a tear-drop shape in cross section. As shown in fig. 8B, the cross-sectional shape of the upper portion of the bar magnet 100 is a mountain shape having a tapered surface whose upper end is tapered and which gradually widens toward the lower end side, and the cross-sectional shape of the lower portion is a hemisphere shape. Further, bar magnet 100 is disposed in case 110 having an upper opening. Further, since the powder or granule G fed from the upper opening of the casing 110 easily slides down along the tapered surface of the upper portion having a mountain shape, the powder or granule G is not easily accumulated in the upper portion.
Disclosure of Invention
Problems to be solved by the invention
However, in the case of the magnet having a circular cross section as described above, and the rod-shaped magnet 100 described in patent document 1, a plurality of magnets may be arranged in parallel so that side surfaces having the same polarity face each other in order to increase the attraction force of the magnetic foreign matter. In this way, a strong magnetic field is generated by concentrating the magnetic force between the opposing side surfaces of the adjacent magnets, and the magnetic foreign matter can be easily attracted to the side surfaces of the magnets by the magnetic field. In this case, the magnetic field is enhanced at the portion where the side surfaces of the adjacent magnets are closest to each other, and the attraction force is increased. For example, as shown in fig. 8B, in the bar magnet 100 having a tear-drop shape in cross section, a strong magnetic field is generated only in the boundary portion P between the upper portion of the mountain shape and the lower portion of the hemispherical shape, and magnetic foreign matter is attracted.
However, in the bar magnet 100 of the tear-drop type in cross section shown in fig. 8B, the boundary portion P where the high magnetic field is generated between the adjacent magnets is formed in a linear shape (meaning a linear shape extending along the axial direction of the bar magnet), and since a region where the high magnetic field is generated cannot be secured widely, the amount of adsorption of the magnetic foreign substance is limited, and the omission of adsorption of the magnetic foreign substance tends to be insufficiently reduced.
Accordingly, an object of the present invention is to provide a bar magnet and a magnetic foreign substance removal device that can suppress retention of magnetic foreign substances and reduce the omission of adsorption of magnetic foreign substances.
Means for solving the problems
In order to achieve the above object, a rod magnet according to a first aspect of the present invention includes: the rod-shaped magnet is used for adsorbing magnetic foreign matters from powder or granular materials or fluid containing the magnetic foreign matters by utilizing a magnetic field, and is extended to a specified length in a rod shape.
According to the above invention, in order to remove magnetic foreign matter from powder or granular material or fluid, when the powder or granular material or fluid is moved toward one end side of the bar-shaped magnet, the powder or granular material or fluid is less likely to be retained on the one end side of the bar-shaped magnet by the guiding action of the guide portion of the bar-shaped magnet, and therefore the powder or granular material or fluid can be smoothly guided to the adsorption portion, and since the pair of adsorption surfaces of the adsorption portion extend in parallel to each other by a predetermined length, the adsorption surface that generates a strong magnetic field can be configured not as a linear shape (see fig. 8B) as in the boundary portion P of a conventional bar-shaped magnet having a tear-drop shape in cross section but as a planar shape extending in a direction orthogonal to the axial direction of the bar-shaped magnet, and therefore the area of the region that generates a strong magnetic field can be secured wide, and as a result, magnetic foreign matter contained in the powder or fluid can be firmly adsorbed, the magnetic foreign matter can be removed efficiently.
In the bar magnet according to the present invention, it is preferable that the bar magnet has a cover made of a nonmagnetic material and having a shape suitable for an outer periphery of the bar magnet, and the bar magnet is insertable into and removable from the cover.
According to the above aspect, since the cover is formed of a non-magnetic material and has a shape suitable for the outer periphery of the bar magnet, and the bar magnet can be inserted into and removed from the cover, when the operation of removing the magnetic foreign matter from the powder or granular material or the fluid is performed in a state where the bar magnet is inserted into the cover, the magnetic foreign matter can be attracted to the cover surface by the magnetic force of the bar magnet. Further, after the magnetic foreign matter is adsorbed, the rod-shaped magnet is pulled out from the cover, and the magnetic force disappears, so that the magnetic foreign matter can be separated by detaching it from the cover surface. That is, since the magnetic foreign matter is adsorbed via the cover and is not directly adsorbed by the bar magnet, the bar magnet does not need to be cleaned, and the workability of removing the magnetic foreign matter can be improved.
In the bar magnet according to the present invention, it is preferable that the bar magnet is formed by axially connecting a plurality of magnets, and the bonding surfaces of the magnets constituting the bar magnet are provided with the same polarity.
According to the above aspect, since the bar magnet is formed by connecting the plurality of magnets in the axial direction and the joint surfaces of the magnets constituting the bar magnet are provided with the same polarity, the range in which the magnetic field acts strongly can be increased in the axial direction of the bar magnet, and as a result, the passage of the magnetic foreign matter without being attracted can be suppressed, and the omission of the attraction of the magnetic foreign matter can be effectively prevented.
In the bar magnet according to the present invention, it is preferable that the respective bonding surfaces of the respective magnets constituting the bar magnet are inclined at a predetermined angle with respect to the axial direction of the bar magnet and are parallel to each other.
According to the above aspect, since the respective bonding surfaces of the magnets constituting the bar magnet are inclined at a predetermined angle with respect to the axial direction of the bar magnet and are parallel to each other, a portion having a strong magnetic field exists in the direction orthogonal to the axial direction of the bar magnet, and even if a magnetic foreign substance passes through a portion having a weak magnetic field, the magnetic foreign substance is attracted to the portion having a strong magnetic field, and thus, the omission of the attraction of the magnetic foreign substance can be more effectively prevented.
Another aspect of the present invention is a magnetic foreign matter removing device for removing magnetic foreign matter by attracting the magnetic foreign matter from a powder or granular material or a fluid containing the magnetic foreign matter with a magnetic field, the magnetic foreign matter removing device including a housing having an inlet for introducing the powder or the fluid and an outlet for discharging the powder or the fluid, and a plurality of bar-shaped magnets arranged in the housing and extending in a bar shape by a predetermined length, the bar-shaped magnets having an attracting portion provided with a pair of attracting surfaces extending in parallel by the predetermined length when the bar-shaped magnets are viewed in a cross section orthogonal to an axial direction of the bar-shaped magnets, and a guide portion provided at one end side of the attracting portion and guiding the magnetic foreign matter to the attracting portion, the bar-shaped magnets being parallel by a predetermined gap, And a plurality of the powder particles or the fluid are arranged in parallel in the housing with the one end side facing the direction of travel of the powder particles or the fluid.
According to the above invention, when the bar magnet is viewed in a cross section orthogonal to the axial direction of the bar magnet, the guide portion for guiding the magnetic foreign matter to the attracting portion is provided on one end side of the attracting portion, and the plurality of bar magnets are arranged in parallel with a predetermined gap therebetween in the casing with the one end side facing the traveling direction of the powder or the fluid, so that the powder or the fluid introduced from the inlet is less likely to stay on the one end side of the bar magnet, and the powder or the fluid can be smoothly guided to the attracting portion of each bar magnet. Further, since the attracting portion of the bar-shaped magnet has a pair of attracting surfaces extending in parallel with each other by a predetermined length, the attracting surface generating the strong magnetic field can be formed into a planar shape extending in a direction orthogonal to the axial direction of the bar-shaped magnet, instead of being linear as in the boundary portion P of the conventional bar-shaped magnet having a tear-drop shape in cross section, and therefore, the area of the region generating the strong magnetic field can be secured wide, and the magnetic foreign matter contained in the powder or the fluid entering the gap between the attracting surfaces of the adjacent magnets can be strongly attracted, so that the attraction loss of the magnetic foreign matter can be reduced, and the magnetic foreign matter can be efficiently removed.
In the magnetic foreign matter removal device according to the present invention, it is preferable that a plurality of covers made of a nonmagnetic material are disposed in the housing so as to match the arrangement of the bar-shaped magnets, the plurality of covers fit to and cover the outer peripheries of the bar-shaped magnets, and the bar-shaped magnets are insertable into and removable from the corresponding covers.
According to the above aspect, since the plurality of covers made of a nonmagnetic material and adapted to cover the outer peripheries of the bar-shaped magnets are arranged so as to match the arrangement of the bar-shaped magnets and the bar-shaped magnets can be inserted into and removed from the corresponding covers, when the bar-shaped magnets are arranged in the casing with the covers inserted therein to perform the operation of removing the magnetic foreign matter from the powder or granular material or the fluid, the magnetic force of the bar-shaped magnets can be used to cause the magnetic foreign matter to be adsorbed on the surfaces of the covers. Further, after the magnetic foreign matter is adsorbed, the magnetic force disappears when the bar magnet is pulled out from the cover, and therefore, the magnetic foreign matter can be separated by detaching it from the cover surface. That is, since the magnetic foreign matter is adsorbed via the cover and is not directly adsorbed by the bar magnet, the bar magnet does not need to be cleaned, and the workability of removing the magnetic foreign matter can be improved.
In the magnetic foreign matter removal device according to the present invention, it is preferable that the bar-shaped magnet is formed by axially connecting a plurality of magnets, and the joint surfaces of the magnets constituting the bar-shaped magnet are provided with the same polarity.
According to the above aspect, since the bar-shaped magnet is formed by connecting a plurality of magnets in the axial direction and the joint surfaces of the magnets constituting the bar-shaped magnet are provided with the same poles, the range in which a magnetic field acts strongly can be increased in the axial direction of the bar-shaped magnet, and as a result, it is possible to suppress the magnetic foreign matter from passing through without being adsorbed, and it is possible to effectively prevent the adsorption omission of the magnetic foreign matter.
In the magnetic foreign matter removal device according to the present invention, it is preferable that the respective bonding surfaces of the magnets constituting the bar-shaped magnet are inclined at a predetermined angle with respect to the axial direction of the bar-shaped magnet and are parallel to each other.
According to the above aspect, since the respective bonding surfaces of the magnets constituting the bar magnet are inclined at a predetermined angle with respect to the axial direction of the bar magnet and are parallel to each other, a portion having a strong magnetic field exists in the direction orthogonal to the axial direction of the bar magnet. Therefore, even if the magnetic foreign matter passes through a portion where the magnetic field is weak, the magnetic foreign matter can be attracted to a portion where the magnetic field is strong, and the magnetic foreign matter can be more effectively prevented from being missed by attraction.
In the magnetic foreign matter removal device according to the present invention, it is preferable that the rod-shaped magnet is provided such that the one end side faces the rotational direction, is radially coupled to the rotational shaft, and is rotatable on the inner periphery of the housing.
According to the above aspect, since the bar-shaped magnet is provided so as to be coupled to the rotating shaft and to be rotatable on the inner periphery of the housing, for example, even when the powder or granule aggregates, the powder or granule can be dispersed by stirring by the rotation of the bar-shaped magnet, and therefore, the efficiency of adsorbing the magnetic foreign matter by each bar-shaped magnet can be improved.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, in order to remove magnetic foreign matter from powder or granular material or fluid, when the powder or granular material or fluid is moved toward one end side of the bar-shaped magnet, the powder or granular material or fluid is less likely to be retained on the one end side of the bar-shaped magnet by the guiding action of the guide portion of the bar-shaped magnet, and therefore the powder or granular material or fluid can be smoothly guided to the adsorption portion, and the adsorption surface that generates a strong magnetic field can be formed in a planar shape extending in a direction orthogonal to the axial direction of the bar-shaped magnet because the pair of adsorption surfaces of the adsorption portion extend in parallel to each other by a predetermined length, so that the area of the region that generates a strong magnetic field can be kept wide, magnetic foreign matter contained in the powder or fluid can be firmly adsorbed, and the omission of adsorption of the magnetic foreign matter can be reduced, and the magnetic foreign matter can.
Drawings
Fig. 1 is an explanatory view showing an embodiment of a bar magnet according to the present invention, in which the bar magnet is viewed from the axial side and the side surface.
Fig. 2 is a perspective view showing an embodiment of the bar magnet according to the present invention.
Fig. 3 is a side view of the bar magnet.
Fig. 4A is an explanatory view of a first other shape of the bar magnet as viewed from the axial direction side.
Fig. 4B is an explanatory view of a second other shape of the bar magnet as viewed from the axial direction side.
Fig. 4C is an explanatory view of a third alternative shape of the bar magnet as viewed from the axial direction side.
Fig. 5A is a plan view of the magnetic foreign substance removal apparatus according to the first embodiment of the present invention.
Fig. 5B is a sectional view of the first embodiment of the magnetic foreign material removing apparatus of the present invention.
Fig. 6 is an explanatory diagram showing a state in which a plurality of bar-shaped magnets are provided in the magnetic foreign substance removal apparatus.
Fig. 7 is a plan view showing a plurality of bar-shaped magnets arranged in parallel in the magnetic foreign substance removal apparatus.
Fig. 8A is an explanatory diagram showing a use state of the magnetic foreign substance removal device.
Fig. 8B is an explanatory diagram showing a conventional configuration.
Fig. 9 is a perspective view showing a main part of a magnetic foreign substance removal apparatus according to a second embodiment of the present invention.
Fig. 10A is a front view of the magnetic foreign material removal apparatus.
Fig. 10B is a plan view of the magnetic foreign material removal apparatus.
Fig. 11 is a top explanatory view showing a third embodiment of the magnetic foreign matter removal device of the present invention.
Detailed Description
One embodiment of the bar magnet of the present invention will be described below with reference to fig. 1 to 4.
As shown in fig. 2 and 3, the rod-shaped
Specifically, referring to fig. 1, each
On the other hand, the
Further, as shown in fig. 1, the top portion (one end 23) of the
In the present embodiment, the pair of parallel suction surfaces 29 and 29 constituting the
As shown in fig. 3, the
In this embodiment, the plate-shaped
The bar magnet may have a shape as shown in fig. 4A, 4B, and 4C, for example. The bar magnet 10A shown in fig. 4A has an orthogonal surface 31a orthogonal to the attraction surfaces 29, 29 at the end portions of the pair of attraction surfaces 29, 29 constituting the
On the other hand, the bar-shaped
The bar magnet 10C shown in fig. 4C has basically the same structure as the
The rod-shaped magnet in the present invention is not particularly limited as long as it has a configuration having an attraction section having a pair of attraction surfaces and a guide section. The number of
In this embodiment, the outer periphery of the
Next, a first embodiment of the magnetic foreign matter removal device of the present invention using the bar magnet configured as described above will be described.
As shown in fig. 5A, the magnetic foreign substance removal device 50 (hereinafter, also referred to as "
One side wall of the
The plurality of bar-shaped
Specifically, as shown in fig. 5B, 4 bar-shaped
As shown in the plan view of fig. 7, the rod-shaped
In this embodiment, the plurality of rod-shaped
As shown in fig. 5A, a
As shown in fig. 5B, a plurality of
Next, the method of using the
First, as shown in fig. 6, from a state in which the sliding wall portion 57 of the removing
In the above state, when the powder or granule G is introduced from the
In the case where the
Further, as shown in fig. 1 and 2, in the rod-shaped
In addition, as shown in fig. 5B, in the removing
The powder and granular material G of the bar-shaped
In this embodiment, as shown in fig. 3, the
In this embodiment, the bonding surfaces 33 of the
Fig. 9 and 10 show a second embodiment of the magnetic foreign matter removal device according to the present invention. The same reference numerals are given to the same parts as those of the above embodiment, and the description thereof is omitted.
The magnetic foreign
Further, in this embodiment, since the bar-shaped
Fig. 11 shows a magnetic foreign matter removal device according to a third embodiment of the present invention. The same reference numerals are given to the same parts as those of the above embodiment, and the description thereof is omitted.
As shown in fig. 11, a magnetic foreign
The removing
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention, and such embodiments are also included in the scope of the present invention.
Description of the symbols
10. 10A, 10B, 10C bar magnet
20 magnet
21 connecting shaft
23 one end of
25 another end
27. 27 bevel face
28 guide part
29. 29 adsorption surface
30 suction part
31 curved surface
31a orthogonal surface
32 basal end portion
33 mating surface
37 conical surface
40 cover
47. 47 inclined plane
49. 49 adsorption surface
50. 50A, 50B, 50C magnetic foreign matter removing device (removing device)
51 casing
53. 53A, 53B introduction ports
55. 55A, 55B outlet
57 sliding wall part
59 support plate
65 guide plate
67 rotating shaft
100 bar magnet
110 casing
120 upper opening
A long axis
B minor axis
C axial direction
G powder
M magnetic foreign matter
A P boundary portion.
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