JPH0810642A - Bar magnet and magnet filter - Google Patents

Abstract

PURPOSE:To improve the safety to prevent a magnet from springing out, assembly workability, and scavenging workability by penetrating magnet single bodies and polar bodies stored in a main body tube with a connecting shaft and plugging both end parts of the main body tube with a pair of end plugs. CONSTITUTION:A bar magnet 1 is composed of a main body tube 2, a connecting shaft 5, and a pair of end plugs 6. A plurality of short cylinder-like magnet single bodies 3 having center holes 3a and a pluarlity of disk-like polar plates 4 having center holes 4a are reciprocally arranged in the axial direction and stored in the main body tube 2. The connecting shaft 5 penetrates the center holes 3a, 4a of respective magnet single bodies 3 and polar plates 4 and screw parts 5a at both end parts are set to face to both end parts of the main body tube 2. Moreover, respective end plugs 6 are screwed in both end parts of the connecting shaft 5, the smaller diameter parts 6a are fixed in the insides of both end parts of the main body tube 2, and the larger diameter parts 6c are made to plug the both end parts of the main body tube 2 in the condition in which the larger diameter parts 6c and the outer circumference of the main body tube 2 are set continuously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet for adsorbing and removing foreign materials such as iron-based and stainless-based metal abrasion powder and metal fragments mixed in various raw materials and products in the form of powder, liquid, fluid or the like. The present invention relates to a filter and a bar magnet used for this magnet filter.

[0002]

2. Description of the Related Art Recent trends in the increase of imported raw materials include resins, pigments, foods, chemicals, spices, seasonings, feeds,
Foreign materials such as small iron pieces and iron powder are found in various raw materials such as fertilizers. Also, in the production line of products using these raw materials, metal abrasion powder of equipment such as screw feeders, rotary valves, and transfer pipes used there, and damage of blades such as mixers, slicers, cutters, shredders, choppers, etc. Iron pieces are mixed in the product. Nowadays, as materials for various equipment used in this production line are shifting from iron-based to stainless steel-based, metal wear powder mixed in products is also changing from iron-based to stainless-based.

Under such circumstances, it is extremely important to remove iron-based and stainless-based metal powders and metal fragments from various raw materials and products in order to ensure product safety. As a countermeasure against this, it is becoming popular to use a magnet filter capable of strongly adsorbing and removing stainless steel wear powder.

FIG. 5 shows an example of the previously known magnet filter as the above-mentioned magnet filter. This magnet filter a is formed by arranging a plurality of columnar bar magnets b, b, ... In a zigzag pattern of two upper and lower stages and erected in a penetrating state between a pair of left and right support frames c, c. For example, it is installed in a hopper into which powdered raw materials and products are put.

Here, as shown in FIG. 6, the bar magnet b has a plurality of short cylinder-shaped magnet units e and a plurality of disc-shaped electrode plates f alternately arranged in the axial direction in a main body tube d. The main body tube d is accommodated, and a pair of end plugs g, g are fitted in the opening portions at both ends of the main body tube d and fixed by an appropriate means such as welding or caulking.

[0006]

By the way, in the above-mentioned conventional bar magnet b, when the pair of end plugs g, g are welded and fixed to the openings at both ends of the main body tube d, the welding arc is affected by the magnetic field lines. Since it becomes unstable, there is a problem that a welding defect is likely to occur, the welding work is troublesome, and the assembling workability is poor.

On the other hand, the above-mentioned magnet filter a has a structure in which the supporting frames c, c at both ends of each bar magnet b are removed during the cleaning work for wiping the metal abrasion powder adsorbed on each bar magnet b with a waste cloth or the like. There was a problem that it became an obstacle and cleaning work was troublesome. If the body tube d of each bar magnet b is damaged due to wear,
There is a risk that the individual magnets e housed inside will suddenly pop out due to the mutual repulsive force, and safety measures therefor are also required.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bar magnet and a magnet filter which are excellent in safety of preventing a magnet from popping out, assembling workability and cleaning workability.

[0009]

For this purpose, a bar magnet according to the present invention comprises a plurality of magnets each having a short cylindrical shape having a central hole and a plurality of polar plates having a central hole which are alternately arranged in the axial direction. The main body tubes that are housed side by side, the connecting shaft that penetrates the center hole of each magnet and the electrode plate so that the threaded portions at both ends face the both ends of the main body tube, and by screwing respectively at both ends of the connecting shaft. A means is provided with a pair of end plugs that close the both ends of the main body tube in a state where the small diameter part is fitted into both ends of the main body tube and the large diameter part is continuous with the outer circumference of the main body tube.

Here, the main body tube is divided into left and right portions at an intermediate portion, and a plurality of magnet units and a plurality of pole plates are respectively housed in the left and right side portions thereof so as to be alternately arranged in the axial direction. .

Further, the magnet filter according to the present invention is
A plurality of short cylinder-shaped magnets each having a central hole and a plurality of disc-shaped polar plates each having a central hole are alternately arranged in the axial direction and accommodated, and a main tube divided into left and right at an intermediate portion, One support frame having a plurality of mounting holes arranged in a pattern and arranged between the left and right sides of each body tube, the center hole of each magnet unit, the center hole of each pole plate, and the support frame The small diameter part fits inside both ends of the main body tube by being screwed into both ends of each connecting shaft and the connecting shaft where the screw parts at both ends face both ends of each main tube through the mounting hole of , The both ends of the main body tube are closed in a state where the large diameter part is continuous with the outer circumference of the main body tube, and the step between the small diameter part and the large diameter part presses both end surfaces of the main body tube to Between the left and right side parts, And a means that a pair of end plugs for holding the over arm.

[0012]

In the bar magnet and magnet filter according to the present invention, which employs such means, even if the main body tube is damaged due to wear or the like, each magnet unit housed inside is not protected by the connecting shaft penetrating its center hole. Prevents easy pop-up.

The pair of end plugs for closing the both ends of the main body tube are screwed to both ends of the connecting shaft arranged in the main body tube, and the conventional welding work is unnecessary. .

Further, since the large diameter portion of the pair of end plugs closing both ends of the main body tube is continuous with the outer circumference of the main body tube, metal abrasion powder or metal pieces adsorbed on the outer circumference of the main body tube, etc. Is continuously wiped to the end plug side.

[0015]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Bar magnet 1 according to one embodiment
2 showing the cross-sectional structure of FIG. 2, reference numeral 2 is a main tube, reference numerals 3, 3 ... Are magnets alone, reference numerals 4, 4 ... are polar plates, reference numeral 5 is a connecting shaft, and reference numerals 6, 6 are end plugs. There is.

The body tube 2 is made of SUS304 or titanium and has a wall thickness of about 0.5 mm.
For example, the outer diameter is set to 22 mm and the length is set to 190 mm. Then, in the main body tube 2, for example, eight magnet units 3, 3 ... And seven pole plates 4, 4 ... Are alternately arranged in the axial direction. In this case, the individual magnets 3, 3, ... Are housed so that the same poles face each other via the pole plate 4.

The magnet unit 3 is a short columnar neodymium rare earth magnet, and its surface magnetic force is super strong. The magnet unit 3 has an outer diameter dimension that is slidably fitted in the main body tube 2 and has an axial length of, for example, 19 mm and a center of 6.5 mm.
A center hole 3a of a certain degree is formed therethrough.

The electrode plate 4 is made of SUS304 and is formed in a disk shape having the same outer diameter as that of the magnet unit 3. The thickness of the electrode plate 4 is set to, for example, 4 mm and the center hole 3a is formed at the center thereof. A central hole 4a having the same diameter as is formed through.

The thickness of the electrode plate 4 is the same as that of the main body tube 2.
The thickness of the electrode plate 4 is necessary because it influences the suction force and the suction force to the surface, and the thinness increases the suction force to the surface of the main body tube 2, and the thicker the suction force to the surface of the main body tube 2. It is appropriately selected according to the suction force or suction force to be applied.

The connecting shaft 5 is made of SUS304 and has a diameter of 6 mm and a length of 190 mm, and at least both ends thereof are provided with M6 screw portions 5a, 5a. The M6 threaded portion may be formed over the entire length of the connecting shaft 5. The connecting shaft 5 has a central hole 3a of each magnet unit 3
Further, the central hole 4a of the electrode plate 4 is penetrated so that the threaded portions 5a, 5a at both ends thereof face the both ends of the main body tube 2.

The end plug 6 is made of SUS304 and has a stepped disk shape with a thickness of about 10 mm. The end plug 6 has a small diameter portion 6a having a width of 5 mm fitted to the inner circumference of both ends of the main body tube 2 and the small diameter portion. A female screw portion 6b formed in the center of the end surface of 6a, a large diameter portion 6c having a width of 5 mm and having the same outer diameter as the main body tube 2, and a step portion 6d located between the small diameter portion 6a and the large diameter portion 6c. Have.

And, such end plugs 6 and 6 are
The threaded portions 5a, 5a of the connecting shaft 5 are attached to the female threaded portions 6b, 6
When b is screwed, the small diameter portions 6a, 6a are fitted to the inner circumferences of both ends of the main body tube 2, and the step portions 6d, 6d press the both end surfaces of the main body tube 2, and the large diameter portion 6c, 6c
Continuously closes the openings of both ends of the main body tube 2 in order to maintain this state for a long period of time, so that the small diameter portions 6a, 6a and the step portions 6d, 6d are maintained.
Is adhered to the body tube 2 with an appropriate adhesive.

The bar magnet 1 according to the embodiment thus constructed has a cylindrical shape with a diameter of 22 mm and a length of 200 mm, the surface magnetic force of the main body tube 2 is super strong, and the bar magnet 1 is located at each electrode plate 4. Not only iron-based but also stainless-based metal powder and metal pieces can be strongly adsorbed to the corresponding portion. Further, the metal powder or the like adsorbed on the surface of the main body tube 2 can be continuously wiped off to the end plugs 6 and 6 sides at both ends, which is excellent in cleaning workability.

When the main body tube 2 is damaged due to abrasion or the like, the magnet units 3, 3 ... Whose same poles face each other through the pole plate 4 try to pop out from the main body tube 2 by mutual repulsive force. However, each magnet unit 3, 3 ...
Is a connecting shaft 5 that penetrates through the central holes 3a, 3a ...
It prevents accidental popping out and is excellent in safety.

Next, a magnet filter according to an embodiment will be described. As shown in FIG. 3, this magnet filter 10 is formed by mounting seven bar magnets 12 on a single support frame 11 arranged in a two-tiered staggered pattern. Since the basic structure is substantially the same as that of the bar magnet 1 described above, the corresponding portions are designated by the same reference numerals and the detailed description thereof will be omitted.

Here, the support frame 11 is a plate-like member having a reverse trapezoidal front shape with a thickness of about 6 mm as shown in FIG. 4, and its material is usually SUS304, SUS316.
However, a non-magnetic synthetic resin may be used as the material.
Each bar magnet 1 is attached to the support frame 11.
Seven mounting holes 11a of about 6.2 mm through which the second connecting shaft 5 penetrates are formed by arranging in a zigzag pattern of four upper stages and three lower stages, and the mutual pitch intervals of the respective mounting holes 11a are, for example, It is set to 50 mm. The support frame 11 has handlebars 11 located at both ends of the upper portion.
b and 11b are attached.

On the other hand, as shown in FIG. 1, the body tube 13 of the bar magnet 12 has a total length of 194 m, for example.
The left part 1 is set to m and has a length of 97 mm at the center.
3a and a right part 13b. The left side portion 13a and the right side portion 13b are the support frame 1
The magnets 3 are arranged on both sides of the magnet No. 1 and four magnets 3 and four pole plates 4 are housed in the magnets 1 alternately arranged in the axial direction.

Here, the connecting shaft 5 is the body tube 1
The total length (194 mm) of 3 and the thickness of the support frame 11 (6
mm) and the total length is set to 200 mm. The connecting shaft 5 includes the central hole 3a of each magnet unit 3 and each pole plate 4.
Through the center hole 4a of the support frame 11 and the mounting hole 11a of the support frame 11 and screw the screw portions 5a, 5a at both ends thereof into the left side portion 13
It is exposed to both ends of the main body tube 13 composed of a and the right side portion 13b.

The threaded portion 5a of the connecting shaft 5 is
By screwing the female screw portions 6b and 6b of the end plugs 6 and 6 into the end portion 5a, the end plugs 6 and 6 have small diameter portions 6a and 6b.
a is fitted to the inner circumference of both ends of the main body tube 13 composed of the left side portion 13a and the right side portion 13b, and the step portions 6d and 6d thereof are
Presses both end surfaces of the main body tube 13, and the large diameter portions 6c, 6c are continuous with the outer peripheries of both end portions of the main body tube 13.
The seven bar magnets 13 are attached to the support frame 11 by sandwiching the support frame 11 between the 3a and the right portion 13b (see FIG. 3).

The left and right portions 13a and 13b of the seven bar magnets 12 mounted on the support frame 11 as the body tubes 13 are
Ring-shaped scraper 14 made of Teflon resin,
14 are tightly slidably fitted together.

In the magnet filter 10 according to the embodiment having the above-mentioned structure, the scrapers 14, 14 are brought to the support frame 11 side, for example, in a hopper (not shown) into which powdered or granular raw materials or products are put. Is installed in. The magnet filter 10 thus installed passes through the seven bar magnets 12 which are arranged in a zigzag pattern on both sides of the support frame 11 and project between the raw materials and products in the form of powder or granules. Adsorbs and removes metal abrasion powder mixed in.

Here, in each bar magnet 12, since the surface magnetic force of the main body tube 13 composed of the left side portion 13a and the right side portion 13b is super strong, not only iron-based metal wear powder and metal pieces but also It also strongly adsorbs and removes stainless steel-based metal abrasion powder and metal fragments.

As described above, the magnet filter 10 in which the iron-based and stainless-based metal abrasion powder and the metal pieces are adsorbed on the left side portion 13a and the right side portion 13b of the main body tube 13 is
Take out from the hopper and clean and remove the metal abrasion powder and metal pieces. That is, the scrapers 14, which are tightly slidably fitted to the left side portion 13a and the right side portion 13b of the main body tube 13, are slid from the support frame 11 side toward the end plug 6 side. By doing so, the main tube 1
Since the metal abrasion powder and the metal pieces adsorbed on the left side portion 13a and the right side portion 13b of 3 are wiped off to the end portion on the side of the end plug 6, the cleaning workability becomes extremely good.

The scrapers 14 and 14 are not always necessary and can be omitted.
In this case, a waste cloth or the like is used to wipe off the metal abrasion powder or the metal pieces adsorbed on the left side portion 13a and the right side portion 13b of the main body tube 13, and in this case also,
Since the support frame 11 can be continuously wiped from the end frame 6 side to the end plug 6 side, the cleaning workability is extremely good.

Each bar magnet 12 of the magnet filter 10 has a left side portion 13a and a right side portion 13b.
The main body tube 13 made of is sometimes damaged by wear, but in this case, since the connecting shaft 5 penetrates the center hole 3a of each magnet unit 3 and the center hole 4a of each pole plate 4 in this embodiment, It is possible to prevent accidents in which the individual magnets 3, 3, ...

[0036]

As described above, in the bar magnet and the magnet filter according to the present invention, even if the body tube is damaged due to wear or the like, each magnet unit housed inside is inadvertently provided by the connecting shaft penetrating its center hole. Since it is prevented from popping out, it is excellent in safety.

The pair of end plugs for closing the both ends of the main body tube are screwed to both ends of the connecting shaft arranged in the main body tube, and welding work as in the prior art is completely unnecessary. Therefore, it is excellent in assembling workability.

Further, since the large diameter portion of the pair of end plugs for closing both ends of the main body tube is continuous with the outer circumference of the main body tube, the metal plugs adhering to the outer circumference of the main body tube are end plugs. It can be wiped off to the side continuously and has excellent cleaning workability.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a magnet filter according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a bar magnet according to an exemplary embodiment of the present invention.

FIG. 3 is a perspective view of a magnet filter according to an embodiment.

FIG. 4 is a front view of a support frame in the magnet filter according to the embodiment.

FIG. 5 is a perspective view of a conventional magnet filter.

FIG. 6 is a vertical sectional view of a conventional bar magnet.

[Explanation of symbols]

 1 bar magnet 2 main body tube 3 magnet alone 3a center hole 4 pole plate 4a center hole 5 connecting shaft 5a screw part 6 end plug 6a small diameter part 6b female screw part 6c large diameter part 6d step part 10 magnet filter 11 support frame 11a mounting hole 11b Handlebar 12 Bar magnet 13 Body tube 13a Left part 13b Right part 14 Scraper

Claims (3)

[Claims] 1. A main body tube for accommodating a plurality of short cylinder-shaped magnet units having a central hole and a plurality of disc-shaped polar plates having a central hole alternately arranged in the axial direction, and a magnet unit and a polar plate for each magnet. The small diameter part fits inside both ends of the main body tube by screwing into the both ends of the connecting shaft and the connecting shaft where the threaded parts of both ends pass through the center hole and face both ends of the main body tube. A bar magnet, comprising: a pair of end plugs for closing both ends of the main body tube in a state where the portion is continuous with the outer circumference of the main body tube. 2. The main body tube is divided into left and right portions at an intermediate portion, and a plurality of the magnet units and the pole plates are alternately arranged side by side in the left and right side portions, respectively. Item 1. The bar magnet according to item 1. 3. A main body in which a plurality of magnets each having a short cylindrical shape having a central hole and a plurality of polar plates having a central hole are alternately arranged side by side in an axial direction and are divided into left and right parts at an intermediate portion. A tube, one support frame that has multiple mounting holes arranged in a predetermined pattern and is placed between the left and right sides of each body tube, the center hole of each magnet unit, the center of each pole plate The small diameter part is inserted into both ends of each main body tube by connecting the shafts through the holes and the mounting holes of the support frame so that the threaded parts at both ends face both ends of each main body tube. Fits inside the main body tube and closes both ends of the main body tube with the large diameter part continuing to the outer circumference of the main body tube, and the step between the small diameter part and the large diameter part presses both end faces of the main body tube. The left and right sides of each body tube A magnet filter comprising a pair of end plugs sandwiching the support frame therebetween.