JPH08117635A - Iron powder or feeble magnetism powder removing instrument and removing device - Google Patents

Abstract

PURPOSE: To do magnetism removing work and cleaning work for iron powder or the like after adsorption without intrusion of foreign matters from the outside by providing a pipe made of a nonmagnetic material, a bar magnetic material having such a diameter and length that it is inserted into the pipe, and a cylindrical casing made of a nonmagnetic material housing the bar magnetic material. CONSTITUTION: In an iron removing instrument 1, a bar magnetic material 3 is inserted into a pipe 2 made of a nonmagnetic material closed by a closing part 'c' at the left end and the pipe 2 is connected to a cylindrical casing 6 having almost the same diameter as the pipe at the right open end. A transfer bar 7 whose right end part projects from a hole 9 in the center part of a stopper 8 fitted to the right opening of the casing 6 is connected to the magnetic material 3 at the left end part. The bar magnetic material 3 is formed by alternately arranging magnet parts 4 and iron rings 5, and attracts iron powder or the like on the surface of the pipe 2 in a state in which it is inside the pipe 2. When removing magnetic powder or the like, the bar magnetic material 3 is transferred to the right to make the magnetic powder or the like easily leave the pipe 2, and the surface of the pipe 2 is wiped with woven fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool and a device for removing iron powder or weak magnetic powder. More specifically, the present invention can almost completely adsorb iron powder or weak magnetic material in powder, grain or fluid, and can completely remove the adsorbed iron powder or weak magnetic material with a simple operation. The present invention relates to a removal tool and a removal device, a method for removing iron powder or weak magnetic powder using the removal tool or removal device, and a method for cleaning adsorbed iron powder or weak magnetic powder.

[0002]

2. Description of the Related Art Conventionally, pellets such as polyethylene and polypropylene, chips such as nylon and polyester, powder such as phenol resin and melamine resin, grains such as rice, wheat and soybean, magnesium hydroxide, salt, calcium carbonate, etc. Magnetic powder or weak magnetic powder on the surface or inside of powder, paste meat such as steak cod, croaker, ground meat such as beef and pork, fluid food such as cheese and butter, petroleum products such as kerosene, light oil, gasoline, heavy oil, etc. , The quality of the products made from it deteriorates, causing accidents, being harmful to the human body, losing commercial value, lowering productivity, and destroying manufacturing equipment. Various removal devices and removal methods for removing powders and the like by utilizing the properties of magnets have been developed and are commercially available.

For example, as shown in FIG. 6, there is a bar magnet 55 for iron removal which is designed so that a ferrite magnet 16 and an iron ring 17 are alternately filled in a stainless steel pipe 15 so as to be magnetized as a whole. In the iron magnet bar magnet 55, if the ferrite magnet is replaced with a samarium magnet, a neodymium magnet or the like having a higher iron removing power, the iron removing power is sufficiently increased, but the iron powder adsorbed on the surface of the pipe 15 is removed. For so-called cleaning, the eyebolt 19 is removed, the lid 18 is opened, the ferrite magnet 16 and the iron ring 17 inside are taken out, the pipe 15 surface is demagnetized, and then wiped with a wiper such as cloth or paper. I had to. However, this work requires a lot of manpower, and the magnet taken out from the pipe 15 adsorbs dust such as magnetic powder and non-magnetic powder from the surroundings, which requires more manpower for cleaning and the magnetic rod taken out. If there are a plurality of them, they are suddenly combined with each other with a large suction force, and at that time, there is a problem that a finger, a hand, a foot, an arm, etc. are pinched, causing a personal injury or damaging the magnetic rod itself.

On the other hand, the iron removing bar magnet 55 shown in FIG. 6 is rarely used by only one, and is usually commercially available as an iron removing device in which a plurality of iron magnets are arranged. As an example, as shown in FIG. 7, there is an iron removing bar magnet body 66 in which a large number of iron removing bar magnets 55 are arranged in parallel. (A) is the top view, (b) is the front view. The iron removing bar magnet body 66 is installed horizontally or vertically, and pellets, powder, or fluid is circulated at right angles to the magnet body, and iron powder or weak magnetic powder therein is adsorbed and removed. However, if the interval between the iron removing bar magnets 55 is narrowed, the adsorption amount increases, but iron powder or weak magnetic powder such as pellets passing through the central portion of the gap will pass through as it is, and the removal rate will be Not enough.

As shown in FIG. 8, an iron removing device developed to improve the removal rate of the iron removing bar magnet body shown in FIG. 7 is composed of upper and lower iron removing bar magnet bodies. The bar magnets of each bar magnet body are arranged so as to be displaced in the upper and lower stages. However, although the iron removing apparatus shown in FIG. 8 has a higher removal rate than that of FIG. 7, it is still insufficient.

[0006]

As described above, in the conventional bar magnet for iron removal (see FIG. 6), the internal bar magnet (the bar composed of the ferrite magnet and the iron ring) is extracted from the stainless steel pipe. The work is dangerous and time-consuming, and it also adsorbs the surrounding contaminants. Also, a bar magnet body in which a plurality of the bar magnets are arranged side by side (see FIG. 7) or a particular arrangement of the bar magnet body (see FIG. Although (8) increases the iron removal effect, it is still insufficient and does not solve any problem at the time of cleaning the adsorbed iron powder or the like. In view of such a situation, the present invention solves the drawbacks of these conventional techniques, the iron removal work is simple and safe, and does not involve surrounding pollutants,
Moreover, it is an object of the present invention to provide a removal tool and a removal device with enhanced iron removing effect, and a method for removing iron powder or weak magnetic powder and a method for cleaning adsorbed iron powder or weak magnetic powder using the removal tool or removal device. It is a thing.

[0007]

In the case of the conventional bar magnet, the present inventor takes out the internal ferrite magnet and the iron ring to the outside, so that the work is dangerous and time-consuming, and the external pollutants are removed. Focusing on the attraction, we realized that the above-mentioned drawbacks could be solved by using a closed structure, and by further arranging a plurality of magnets having the closed structure in parallel and further stacking the parallel bodies, it is possible to further eliminate the problem. The inventors have found that the iron effect can be enhanced, and further studied to complete the present invention.

That is, according to the present invention, a pipe made of a non-magnetic material having a closed left end and an opened right end, a rod-shaped magnetic body having a diameter and a length that can be inserted into the pipe, and the rod-shaped magnetic body. A non-magnetic cylindrical casing having a diameter and a length capable of accommodating and having a left end opened, and the rod-shaped magnetic body from the pipe into the cylindrical casing, or in the opposite direction. A moving rod to be moved to and a stopper having a hole for supporting and moving the moving rod and closing the right end of the cylindrical casing, and the right end of the pipe and the left end of the cylindrical casing. Each of the parts has an open end connected to each other, a left end of the moving rod is connected to a right end of the rod-shaped magnetic body, and a right end of the moving rod penetrates a hole of the stopper. Supported by Its right end tip on the removal tool iron powder or weakly magnetic powder, characterized in that protrudes outside from the stopper.

Further, the present invention relates to the following removing device constituted by using a plurality of the above-mentioned iron powder or weak magnetic powder removing tools. A device for removing iron powder or weak magnetic powder (removing device A) in which two or more removing tools of the present invention are arranged in parallel at intervals. An iron powder or weak magnetic powder removing device (removing device B) in which the removing devices A of the present invention are stacked at a distance and arranged in a plurality of stages. In the removing apparatus B of the present invention, an iron powder or weak magnetic powder removing apparatus (removing apparatus C) in which the removing tool of the removing apparatus of a certain stage and the removing tool of the removing apparatus of the next stage are arranged so as to deviate from each other. An iron powder or weak magnetic powder removing device (removing device D) in which the removing devices A, B and / or C of the present invention are stacked in a grid pattern at intervals. In addition, the spacing between the removal tools in a certain removal device and the spacing between the n-th removal tool and the (n + 1) -th removal tool are
It is appropriately determined according to the rod-shaped magnetic material used, the properties of the substance to be passed, the amount of iron powder or weak magnetic powder contained in the substance, and the like.

Further, according to the present invention, a granular material, grain or fluid having iron powder or weak magnetic powder on its surface or inside is passed through the iron powder or weak magnetic powder removing tool or removing device of the present invention, Removal of iron powder or weak magnetic powder characterized by adsorbing the iron powder or weak magnetic powder in the powder, grain, grain or fluid to the surface of the non-magnetic pipe of the removal tool or the removal tool of the removal device Regarding the method.

According to the present invention, in the method for removing iron powder or weak magnetic powder of the present invention, iron powder or weak magnetic powder adsorbed on the surface of a non-magnetic pipe of a removing tool is used as a rod-shaped magnetic material inside the pipe. By moving the moving rod rightward into the cylindrical casing on the right side of the pipe, demagnetizing the hype surface, and removing the adsorbed iron powder or weak magnetic powder. The present invention relates to a cleaning method for a removing tool or a removing device.

The terms "left end" and "right end" are used in the present invention for the purpose of facilitating understanding of the present invention. The term "left end" means "right end" or "right end". The invention in which "part" is expressed as "left end" is also included in the scope of the present invention because it is a symmetrical structure of the present invention and is substantially the same.

In the present invention, the non-magnetic material includes stainless steel, copper, titanium, aluminum, polyvinyl chloride, polyethylene, polypropylene, polyamide, polyester, polyacetal, polysulfone, polycarbonate, polyphenylene oxide, and the like. It is suitable because it has excellent workability and mechanical properties.

In the present invention, the magnetic substance means an alnico magnet, a ferrite magnet, a samarium / cobalt magnet,
It means samarium / iron-based magnets and neodymium / iron-based magnets.

In the present invention, iron powder or weak magnetic powder means
Objects selected from the group consisting of powders, grains and fluids, such as polyethylene pellets, polypropylene pellets, nylon chips, phenolic resin powders, rice, wheat,
It exists on the surface and / or inside of soybeans, magnesium hydroxide powder, Alaska pollack meat, minced meat, cheese, petroleum products, etc., and weak magnetic powders are cerium, manganese, palladium, chromium, uranium, lanthanum, mozna stone. , Tourmaline, malachite, pyrite, rutile and the like. It goes without saying that any one of these iron powders or weak magnetic powders may be used alone, or both may be mixed. In the following description, iron powder or weak magnetic powder may be abbreviated as iron powder or the like.

In the present invention, the non-magnetic pipe is a pipe in which a rod-shaped magnetic body is inserted to exert a magnetic force on the surface and outside of the pipe so that iron powder or the like existing outside is adsorbed on the pipe surface. Yes, its left end is closed to prevent contaminants from entering from the outside.

The rod-shaped magnetic body may have any structure as long as it exerts a magnetic force on the surface and the outside of the pipe, but normally, in view of cost and performance, a disc-shaped magnet and a disc-shaped iron ( Iron rings) are alternately arranged to form rods by adhering or welding, or disk magnets and disk irons (iron rings) are alternately arranged and filled in a pipe, and both ends of the pipe are filled. May be formed into a rod shape by blocking.

In the present invention, the right end of the rod-shaped magnetic body is connected to the moving rod, and the rod-shaped magnetic body is moved from the inside of the pipe into the cylindrical casing by moving the moving rod to the right. Then, the iron powder is removed so that the magnetic force does not act on the adsorbed iron powder on the surface of the pipe.

The cylindrical casing is a place for accommodating the rod-shaped magnetic material that has moved from the inside of the pipe, and its right end is sealed by a stopper and its left end is attached to the right end of the pipe so as to prevent contaminants from entering from the outside. It is joined. The stopper is provided with a hole having substantially the same shape as or slightly larger than the cross section of the moving rod for protruding the right end of the moving rod to the outside. The rod-shaped magnetic body in the pipe can be moved into the cylindrical casing by gripping the moving rod protruding from the stopper and pulling it to the right. If the moving rod is connected to a portion corresponding to the substantially central portion of the right end of the rod-shaped magnetic body and is projected to the outside through a hole provided at the substantially central portion of the stopper, the operability of the removing tool is improved. preferable.

From the above, the length of the non-magnetic pipe is approximately equal to the length of the rod-shaped magnetic body, and the cylindrical casing also accommodates the rod-shaped magnetic body. Is preferably approximately equal to the length of the rod-shaped magnetic body. The inner diameter of the pipe and the inner diameter of the cylindrical casing may be slightly different, but are preferably the same from the viewpoint of manufacturing and operation. It is desirable that the inner diameter of the pipe and the outer diameter of the rod-shaped magnetic body be substantially the same in consideration of the clearance portion, as long as both can smoothly move.

With the structure of the tool for removing iron powder as described above, the manufacturing cost is low, the assembly is easy, and
Moreover, the iron removing work can be performed easily and safely, and there is no invasion of contaminants from the outside, and the removal tool can be far superior to the conventional removal tools.

An example of a tool for removing iron powder or the like of the present invention (hereinafter also referred to as an iron removing tool) is shown in FIG. This iron removal tool 1
Is a non-magnetic pipe 2 whose left end is closed by a closing portion c, a rod-shaped magnetic body 3 having an outer diameter almost equal to the inner diameter of the pipe and a length slightly shorter than the pipe, and the pipe 2 A cylindrical casing 6 connected to the right end opening and having substantially the same inner diameter as the pipe, a stopper 8 attached to the right end opening of the casing 6, the right end of which projects from a hole 9 in the center, and the left end of which is The moving body 7 is roughly configured by a moving rod 7 connected to the center of the right end of the magnetic body 3. The rod-shaped magnetic body 3 is composed of magnet portions 4 and iron rings 5 arranged alternately.

The above-mentioned iron removing tool of the present invention exerts its effect sufficiently even if it is used alone, but in order to further improve the iron removing efficiency, a plurality of iron removing tools arranged in parallel are removed. A device (hereinafter, also referred to as an iron removing device) may be used. An example of the iron removing device in the present invention is shown in FIG. The iron removing tools 1 of the iron removing device 11 are integrated by at least two (two in the figure) horizontal bars 10 arranged in a direction perpendicular to the iron removing tools 1. The iron removing tool 1 and the horizontal bar 10 can be coupled by welding, adhesion, temporary attachment, screws, fasteners, or the like.

In the present invention, the iron removing efficiency can be further improved by stacking the iron removing devices in two stages vertically or more. An example of such a multi-stage iron removing device is shown in FIG. In the iron removing device 22, the upper iron removing tool 1 and the lower iron removing tool 1 overlap each other with a certain distance.

Another example of a plurality of stages of iron removing devices is shown in FIG. In this iron removing device 33, the iron removing devices are arranged in the upper, middle, and lower three stages, and the iron removing tools 1 in the upper, middle, and lower stages are arranged with a certain distance from each other and displaced from each other. That is, the iron removing tool 1 of the next stage is arranged at a position corresponding to the gap between the iron removing tools 1 of a certain stage. In the iron removing device 22 shown in FIG. 3, iron powder or the like in the fluid passing through the gaps between the iron removing tools 1 may pass through without being brought into contact with the iron removing tools 1 below. In the case of the structure shown in (1), since the iron removing tool 1 in one stage and the iron removing tool 1 in the next stage are displaced from each other, the iron powder and the like in the fluid will always come into contact with one of the iron removing tools 1. . Although FIG. 4 shows an example of three stages,
It goes without saying that if the number of stages is further increased to 4 and 5, the iron removal efficiency is further improved.

In the above description with reference to FIGS. 2 to 4, the iron removing devices 11 each including the plurality of iron removing tools 1 are arranged in the same direction, but the iron removing devices 11 are not limited to this. The iron removing device 11 in each stage may be arbitrarily arranged with respect to the iron removing device in the previous stage. In FIG. 5, the two-stage iron removing devices (the iron removing device on the upper stage and the iron removing device on the lower stage are displaced from each other) are shown as the n-th iron removing device (n +
1) An example is shown in which seven steps are arranged so that the angle formed by the step removal tool is about 90 °, that is, in the shape of a double girder. The fluid is introduced from the input port 13 provided at the upper portion of the iron removing device 44, passes through each iron removing device, and is discharged from the lower outlet port 14. At that time, iron powder or the like in the fluid is adsorbed on the surface of the iron removing tool. By arranging the iron removing devices in multiple stages, the iron removing efficiency is greatly improved. An iron removing device in which a plurality of iron removing devices in which a plurality of iron removing tools are arranged are arranged to form a housing 12 on which the iron removing devices are mounted, and each iron removing device is coupled with bolts, nuts, fasteners, bands, etc. It can be assembled by doing. The housing 1
It is preferable that 2 has a closed structure so that contaminants do not enter from the outside.

Heretofore, the iron removing tool or the iron removing device is brought into contact with a fluid substance or the like from which iron powder or the like should be removed by installing the iron removing tool or the iron removing device horizontally and from the upper side to the lower side. Although the case where it is performed in the direction toward the direction has been described, in addition to this, even if the above iron removing device is installed vertically and a fluid substance is flowed in the horizontal direction, the same high iron removing efficiency is achieved. . Further, if necessary, a fluid substance or the like from which iron powder or the like should be removed can be passed from the lower side to the upper side through the iron removing tool or device installed horizontally. In short, the method is not limited as long as the fluid or the like comes into contact with the removal tool. Furthermore, in the description with reference to the drawings so far,
All removal tools in one removal device were of the same diameter and the same length, but they may be different from each other.

Next, a method for cleaning iron powder or the like adsorbed on the surface of the iron removing tool will be described. First, the rod-shaped magnetic body inside the non-magnetic pipe is moved into the cylindrical casing on the right side of the pipe by moving the moving rod to the right, and iron powder or the like is easily separated from the hype surface. Then
The surface is wiped with paper, woven cloth, non-woven cloth or the like, or clean water, air or the like is flown on the surface of the pipe to remove iron powder and the like. Further, the above cleaning operation can be used together. These cleaning operations may be performed manually or automatically mechanically.

[0029]

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples, and any invention embodying the technical idea of the present invention will be described. It is included in the range of. Example 1 Manufacture of iron removal tool Each of the following parts: Non-magnetic pipe: stainless steel pipe having an inner diameter of 24 cm, outer diameter of 25 cm, and length of 320 cm Rod-shaped magnetic body: disc-shaped ferrite system having an outer diameter of 23 cm and a width of 10 cm A magnet and an iron ring having an outer diameter of 23 cm and a width of 5 cm are alternately arranged to have an inner diameter of 23.1 cm, an outer diameter of 23.9 cm, and a length of 310 cm.
Ferritic rod-shaped magnetic material (surface magnetic force: 3,000 gauss) filled in a stainless steel pipe of which both ends are closed. Moving rod: 8 cm in diameter, 420 cm in length Stopper: Stainless steel stopper centered on a hole with an inner diameter of 8 cm Are prepared and assembled into an iron removal tool shown in FIG.

Removal of Iron Powder The iron removing tool is arranged at a distance of 12 cm from the inner wall of a stainless box having an inlet and an outlet on the top and bottom, respectively. Granules obtained by thoroughly mixing 100 kg of cylindrical polyethylene pellets having a diameter of 3 mm and a length of 3 mm with 100 g of iron powder having an average particle diameter of 3 μm were introduced from the inlet, allowed to flow out from the outlet, and passed through the surface of the iron removing tool. After that, the non-magnetic pipe was demagnetized, the iron powder was wiped off with a non-woven fabric and weighed, and the iron powder removal rate was 87%.

Example 2 The iron removing tool manufactured in Example 1 was separated by a gap of 3 as shown in FIG.
5 pieces of iron removing equipment arranged in parallel with each other in a stainless steel box with a gap of 3 cm between the inner wall and 100 kg of kerosene with an average particle size of 1
When a fluid mixture containing 10 g of iron powder having a diameter of μm was circulated 5 times, the removal rate of iron powder was 94%.

Example 3 The iron removing tool manufactured in Example 1 was separated by 5 spaces as shown in FIG.
An iron removing device consisting of two stages of iron removing devices in parallel with 5 cm
Placed in a stainless steel box with a gap of 5 cm from the inner wall, rice grains 10
When a fluid mixture containing 50 g of iron powder having an average particle size of 10 μm in 0 kg was circulated 10 times, the removal rate of iron powder was 99.8.
%Met.

Example 4 The iron removing tool manufactured in Example 1 was separated by a space of 2 as shown in FIG.
An iron removing device in which five, four, and five iron removing devices arranged in parallel in the upper, middle, and lower stages are placed in a stainless steel box with a gap of 2 cm between the inner wall and the average particle diameter of 30 μm in 100 kg of Alaska pollack paste When a fluid mixture containing 5 g of iron powder was circulated 7 times, the iron powder removal rate was 99.8%.

Example 5 Manufacture of Iron Removal Tool An iron removal tool was manufactured in the same manner as in Example 1 except that the ferrite magnets in Example 1 were replaced with neodymium magnets. The surface magnetic force of the rod-shaped magnetic body is 120
It was 00 gauss. This iron removal tool was arranged in a cross pattern in the housing as shown in FIG. The spacing between the control tools was 12 cm.

Removal of iron powder Density 0.922 g / ml, melt index 3.2 g
/ 10 min high-pressure low density polyethylene (manufactured by Nippon Unicar, super clean compound for ultra-high voltage CV cables, pellets with a diameter of 3 mm and length of 3 mm, and iron powder that does not generate water trees) 100 kg, particle size 50
The above high-pressure method in which iron powder of 10 μm, 30 μm, 10 μm, or 3 μm was mixed, respectively, and the mixture was introduced from the introduction port of the iron removing device shown in FIG. 5 and passed once and then iron removed When an electric tree and a water tree of the low density polyethylene were tested, the generation of the electric tree and the water tree was not recognized at all. Therefore, it can be seen that the iron powder was completely removed.

COMPARATIVE EXAMPLE 1 The high-pressure method low-density polyethylene mixed with iron powder used in Example 5 was subjected to a test for generation of electrical trees and water trees without iron removal. It occurred and was not practical.

Comparative Example 2 In Example 1, the iron removing tool was manufactured without using the cylindrical casing, the moving rod, the stopper, etc., that is, only from the rod-shaped magnetic body and the nonmagnetic pipe surrounding the rod-shaped magnetic body. After iron powder was adsorbed on the surface of the non-magnetic pipe, the rod-shaped magnetic body was pulled out, and the surrounding dust, dust, and metal powder were adsorbed on the surface. Further, when working with a plurality of iron removing tools, it is dangerous because the rod-shaped magnetic bodies attract each other with a strong magnetic force, and it takes a lot of labor to separate them.

[0038]

As described above in detail, since the tool for removing iron powder or weak magnetic powder of the present invention has a closed structure, no foreign matter is mixed in from the outside, and the demagnetization is safe and easy. It is possible to perform work and cleaning work such as iron powder after adsorption. Further, a removing device in which the removing tools of the present invention are arranged in parallel,
A multi-stage removing device in which a plurality of the removing devices are arranged exhibits a higher iron removing effect. Therefore, according to the present invention,
A wide range of iron removing devices can be constructed from low levels of iron removal to high levels of iron removal depending on the level of iron powder in the fluid to be iron removed. Cleaning work can be done very easily and safely. In particular, when a large amount of treatment per unit time and a high level of iron removal rate are required, the conventional iron removing apparatus could not cope, but according to the removing tool and the removing apparatus of the present invention, it is possible to perform a large-scale treatment for the first time. It enables a high level of iron removal and is safe to operate. In addition, the removal device having a multi-stage structure of the present invention can be assembled and disassembled and cleaned more safely and easily by adopting a heavy box structure for each stage, and since the structure is simple and there are no moving parts. , No ingress of pollutants. Further, since the removing device at each stage can be a heavy box type having a square cross section, the required number of stages can be easily increased or decreased, and the mounting direction is not restricted. In particular, when the removal devices of each stage are combined in a cross beam shape, it is possible to prevent a short pass. Further, in the future, when a magnet having a stronger magnetic force is developed, there is an advantage that the performance can be improved by replacing only the magnet body. In particular, the removal tool and the removal device of the present invention can remove even a very small amount of metal powder in polyethylene for high-voltage CV cables, which has been extremely difficult in the past. Offering is now possible.

[Brief description of drawings]

FIG. 1 is a longitudinal section showing an embodiment of an iron removing tool according to the present invention.

2A and 2B are drawings showing an embodiment of a single-stage iron removing apparatus according to the present invention, in which FIG. 2A is a plan view thereof and FIG. 2B is a front view thereof.

FIG. 3 is a front view showing an embodiment of an iron removing apparatus having a two-stage structure according to the present invention.

FIG. 4 is a front view showing an embodiment of an iron removing device having a three-stage structure according to the present invention.

FIG. 5 is a front view showing an embodiment of an iron removing device having a multistage structure housed in a housing according to the present invention.

FIG. 6 is a vertical sectional view showing a conventional bar magnet for iron removal.

FIG. 7 shows an iron removing device including an iron removing bar magnet body in which a plurality of iron removing bar magnets of FIG. 6 are arranged in parallel, and (a) is a plan view thereof.
(B) is the front view.

FIG. 8 is a front view showing an iron removing device in which the iron removing bar magnet body of FIG. 7 has a two-stage structure.

[Explanation of symbols]

 1 Iron removal tool 2 Non-magnetic pipe 3 Rod-shaped magnetic body 6 Non-magnetic cylindrical casing 7 Moving rod 8 Stopper 9 Hole 11, 22, 33, 44 Iron removal device c Non-magnetic pipe closing part

Claims (7)

[Claims] 1. A pipe made of a non-magnetic material, the left end of which is closed and the right end of which is opened, a rod-shaped magnetic body having a diameter and a length that can be inserted into the pipe, and the rod-shaped magnetic body can be stored. A non-magnetic cylindrical casing having a diameter and a length and having an open left end, and a movement for moving the rod-shaped magnetic body from inside the pipe into the cylindrical casing or in the opposite direction. And a stopper having a hole for supporting and moving the moving rod and closing the right end of the cylindrical casing, and the right end of the pipe and the left end of the cylindrical casing are open respectively. The ends are connected, the left end of the moving rod is connected to the right end of the rod-shaped magnetic body, the right end of the moving rod is supported so as to penetrate through the hole of the stopper. , And its right end is forward A tool for removing iron powder or weak magnetic powder, which is characterized in that it is projected to the outside from the stopper. 2. A device for removing iron powder or weak magnetic powder, comprising two or more tools for removing iron powder or weak magnetic powder according to claim 1 arranged in parallel at intervals. 3. An iron powder or weak magnetic powder removing device in which two or more iron powder or weak magnetic powder removing devices according to claim 2 are stacked at intervals and arranged in a plurality of stages. 4. The removal tool of the removal device of one stage and the removal tool of the removal device of the next stage are arranged so as to be offset from each other.
The iron powder or weak magnetic powder removal device described. 5. An iron powder or weak powder obtained by stacking two or more iron powder or weak magnetic powder removing devices according to claim 2 in a grid pattern at intervals. Magnetic powder removal device. 6. A powdery or granular material, grain or fluid having iron powder or weak magnetic powder on or in the surface thereof.
The iron powder or weak magnetic powder removal tool or removal device according to any one of 1, and the non-magnetic pipe surface of the removal tool or removal device A method for removing iron powder or weak magnetic powder, which comprises adsorbing the iron powder or weak magnetic powder according to claim 1. 7. The method of removing iron powder or weak magnetic powder according to claim 6, wherein the iron powder or weak magnetic powder adsorbed on the surface of the non-magnetic pipe of the removing tool is moved in the rod-shaped magnetic body inside the pipe. By moving the working rod to the right into the cylindrical casing on the right side of the pipe, the hype surface is demagnetized, and the adsorbed iron powder or weak magnetic powder is removed. Method of cleaning removal tool or device.