JPH11138046A - Device for removing fine iron powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a durable device for removing fine iron powder which can remove fine iron powder mixed in raw materials of food, chemical, ceramic, and other industries easily from the raw materials. SOLUTION: The pipe bodies 21 of a magnet body 2 which is constituted from pipe bodies 21 constituted from a nonmagnetic material which are located in a main body 1 arranged in a raw material supply route, a partition wall 22 for holding each pipe body 21, cylinders 26 which communicate with each pipe body 21 and have a length similar to that of the pipe bodies 21, magnetic elements 23 which slide between the insides of the pipe bodies 21 and the insides of the cylinders 26, joint plates 24 which fixed the end part of each magnetic element 23, and the rod 25 which moves/operates the joint plates 24 to position the magnetic elements selectively either in the pipe bodies 21 or in the cylinders 26 are constituted from a bottomed member which is formed by boring the center of the round rod of a raw material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fine iron powder used in a raw material supply passage for removing fine iron powder mixed in the raw material of food industry, chemical industry, ceramic industry, etc. from the raw material. The present invention relates to an iron powder removing device.

[0002]

2. Description of the Related Art The applicant of the present invention has previously disclosed a method of removing fine iron powder used in a raw material supply passage in order to remove fine iron powder mixed in the raw material of the food industry, the chemical industry, the ceramic industry and the like. A powder removing device has been proposed (for example, see Japanese Patent Application Laid-Open
355). This fine iron powder removing apparatus has an inlet for introducing a raw material mixed with fine iron powder and an outlet for discharging the raw material, and is made of a non-magnetic material located in a main body provided in a raw material supply passage. A plurality of pipes, a partition wall for holding each pipe, a pipe that is in communication with each pipe, and that is substantially the same length as the pipe, and a magnetic element that slides between the pipes and the pipe. A connection plate to which the end of each magnetic element is fixed, and a magnet body composed of a rod that moves the connection plate to selectively position the magnetic element in either the tube or the cylinder, The fine iron powder mixed with the raw material is adsorbed on the surface of the tube while the element is positioned in the tube, thereby removing the fine iron powder from the raw material.

[0003] By the way, the tube for accommodating the magnetic element of this fine iron powder removing device is made of the same material at the bottom of a pipe member made of a non-magnetic material so that the raw material does not flow into the tube. The bottom plate is closed by welding or the like.

[0004]

However, the pipe constructed by attaching the bottom plate to the bottom of the pipe member by welding or the like in such a manner as described above, has been subjected to a long-term use to reduce the wear effect of the raw material flowing around the pipe. There was a problem that the pinhole was formed or the bottom plate was detached due to the corrosive action, and the expensive magnetic element was rusted or corroded.

The present invention has been made in view of the above problems of the fine iron powder removing apparatus, and can easily remove the fine iron powder mixed in the raw materials of the food industry, the chemical industry, the ceramic industry, etc. It is an object of the present invention to provide a fine iron powder removing device having a property.

[0006]

In order to achieve the above object, a fine iron powder removing apparatus according to the present invention has an inlet for introducing a raw material mixed with fine iron powder and an outlet for discharging the raw material. A plurality of pipes made of a non-magnetic material located in the main body disposed in the supply path, a partition wall holding each pipe, and communicating with each pipe, and having substantially the same length as the pipe. A cylindrical body, a magnetic element that slides between the cylindrical body and the cylindrical body, a connecting plate to which an end of each magnetic element is fixed, and a magnetic element that is selectively positioned in the cylindrical body or the cylindrical body. In a fine iron powder removing apparatus provided with a magnet body constituted by a rod for moving a connecting plate, a pipe body is constituted by a bottomed member formed by perforating a center of a round bar of a material. .

[0007] This fine iron powder removing device arranges a magnetic element inside the fine iron powder mixed in the raw material when the raw material mixed with the fine iron powder in the food industry, chemical industry, ceramic industry, etc. passes through the main body. The fine iron powder is removed from the raw material by being adsorbed on the surfaces of the plurality of tubes made of the non-magnetic material provided. Then, at the time of maintenance, if necessary, the magnet body is separated from the main body, and the magnetic element is moved from the inside of the tube to the inside of the tube so that no magnetic force acts on the surface of the tube. The fine iron powder adsorbed on the surface of the tube is easily and completely removed by washing away with a washing solution or the like. In this case, since the tube is constituted by a bottomed member formed by piercing the center of the round bar of the material, the tube is worn by the raw material flowing around the tube due to long-term use. Even under the action or the corrosive action, the pinhole is not formed, the bottom plate is detached, and the expensive magnetic element is not rusted or corroded, and the durability of the device can be improved.

In this case, the outer diameter of the holding portion can be made large so that the thickness of the holding portion formed by the partition wall of the tubular body is increased.

Thus, when the tube is welded to the partition wall and held, the tube does not have any defects, the strength of the welded portion of the tube is improved, and the durability of the apparatus can be improved. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the fine iron powder removing apparatus of the present invention will be described below with reference to the drawings.

1 to 5 show one embodiment of the fine iron powder removing apparatus of the present invention. The apparatus for removing fine iron powder includes a main body 1 having a substantially cylindrical shape, a magnet body 2 detachably mounted on the main body 1, and a magnetic element 2 forming the magnet body 2.
3 is constituted by a driving mechanism 3 that moves the connecting member 3 via a connecting plate 24 and a rod 25.

In the main body 1, since the main body 1 is disposed in the middle of a raw material supply passage in the food industry, the chemical industry, the ceramic industry, or the like, and used, a flow inlet 11 for introducing a flange-like raw material and a flow for discharging the raw material are provided. An outlet 12 is formed, and a flange-shaped opening 13 for mounting the magnet body 2 is provided at an upper portion of the main body 1, and a flange-shaped opening 13 for mounting an inspection lid 15 is provided at a lower portion of the main body 1. 14 are formed respectively.

The magnet body 2 mounted on the main body 1 is composed of a plurality of tubes made of a non-magnetic material, for example, stainless steel, synthetic resin, etc., located inside the main body 1 when the magnet body 2 is mounted on the main body 1. The body 21, a partition 22 that holds each tube 21, and a cylinder 22 a that communicates with each tube 21, and that can be separated from a cylinder 22 a extending upward from the periphery of the partition 22.
A tubular body 26 having substantially the same length as the tubular body 21;
A magnetic element 23 sliding between the insides, a connecting plate 24 to which an end of each magnetic element 23 is fixed, and a magnetic element 23 for selectively positioning the magnetic element 23 in either the tube 21 or the tube 26. Rod 25 for moving the connecting plate 24
And a grip 25 a provided at the tip of the rod 25.

[0014] In this case, the tube 21 accommodating the magnetic element 23 is formed so that the raw material does not flow into the tube, and the tube 21 can be used for a long period of time.
Even if the raw material flowing around the pipe 21 is subjected to abrasion action or corrosion action, a pinhole is formed or a bottom plate is separated and expensive magnetic elements are formed as in the pipe of a conventional fine iron powder removing device. As shown in FIG. 9, the tube 21 is made of a non-magnetic material so that the tube 23 does not rust or corrode.
For example, a round bar made of a material such as stainless steel or synthetic resin is formed of a bottomed member formed by drilling the center with a drill or the like.

The tube 21 is held on the partition 22 by welding, bonding, or bonding the tube 21 to a through hole formed in the partition 22.
It is performed by shrink fitting or the like so that the main body 1 and the cylindrical body 26 do not communicate with each other, that is, the raw material is prevented from flowing into the cylindrical body 26. In particular, the pipe body 21 is welded to the partition wall 22. In the case of holding, the thickness t of the holding portion 21a formed by the partition wall 22 of the tube 21 is set to be larger than the thickness t of the other portions so that no defect occurs in the tube 21 due to welding. This is because, when the tube 21 is manufactured, the outer periphery of the material round bar is partially cut so that the holding portion 21 a
Is formed, for example, about 1 mm larger than the outer diameter D of the other portion, and the thickness t0 of the holding portion 21a of the tube 21 is formed.
Is thicker than the thickness t of the other portion, for example, the thickness t0 of the holding portion 21a of the tube 21 is set to 1 mm, and the thickness t of the other portion is
Is set to 0.5 mm.

FIGS. 10 to 12 show an example of a welding apparatus used for welding the pipe 21 to the partition wall 22. FIG. This welding device includes a welding device main body 4 and a control unit 5. The welding device main body 4 includes a rotating body 40 including a cylindrical inner pipe 41 and an outer pipe 42 that rotate around the outer peripheral surface of the pipe body 21 disposed through the through hole formed in the partition wall 22 as a rotation axis; A contact member 46 disposed at the lower end of the rotating body 40 and abutting against the surface of the partition 22 to maintain a constant distance between the lower end of the rotating body 40 and the surface of the partition 22; Body 40
Is an inert gas supply pipe 44 for TIG welding formed of an electric conductor such as copper which is electrically insulated and disposed, and a contact between the tip of the inert gas supply pipe 44 and the partition wall 22 of the tube 21. A welding electrode 45 for TIG welding formed of a wearable material such as tungsten, which is disposed so as to face the holding portion (welding portion) 21a, and a motor 47 for rotating the rotating body 40. You.

In this case, if necessary, a spacer 43 is disposed between the cylindrical inner pipe 41 and the outer pipe 42 constituting the rotating body 40, and a welding electrode 45 is provided at the tip by the spacer 43. The installed inert gas supply pipe 44 is supported. The upper end member 48 of the rotating body 40 that fixes the inner pipe 41 and the outer pipe 42 and transmits the rotational driving force of the motor 47 to the inner pipe 41 and the outer pipe 42 is a motor provided on the fixed side 49 of the welding apparatus main body 4. The connection between the lower end of the rotating body 40 and the surface of the partition wall 22 can be maintained constant by being connected to the rotating shaft 47a of the 47 so as to be vertically slidable. Further, a contact member 46 provided at the lower end of the rotating body 40 is provided.
Are arranged at substantially equal intervals via a support member 46a on the rotating body 40 so that the rotating body 40 rotates smoothly around the pipe 21 while maintaining a constant distance from the surface of the partition wall 22. And a plurality of copying balls 46b or copying rollers.

Further, the tube 21 at a position near the holding portion 21a
Inside, a heat radiating member 6 having an outer diameter substantially equal to the inner diameter of the tube body 21, more specifically, an outer diameter of an inner diameter of -0.5 mm, and formed in a cylindrical shape from a material having high thermal conductivity such as copper is provided. We are going to arrange. Thus, the heat input to the pipe 21 can be quickly released to the heat radiating member 6, and the welding heat input of the partition 22 and the pipe 21 having a smaller thickness than the partition 22 can be balanced. It is possible to prevent the tubular body 21 from being blown by heat, and the tubular body 21 is thinner than the partition wall 22.
Can be welded without causing defects in the tube 21.

Here, the inert gas supply pipe 44 is formed of an electric conductor, and the welding electrode 45 is disposed at the tip thereof. However, a conductive member made of copper or the like is provided in the inert gas supply pipe 44. The inert gas supply pipe and the welding electrode can be separated from each other, for example, by inserting a welding electrode at the tip. The rotating body 40 that rotates about the tubular body 21 as a rotation axis is not necessarily a cylindrical inner pipe 41 and an outer pipe 42.
The welding electrode 45 can be rotated with the tube 21 as a rotation axis and the holding portion 21a oriented while maintaining a constant distance from the surface of the partition wall 22. If so, for example, omit the outer tube 42,
Instead of the inner tube 41 and the outer tube 42, a rotating body or a sliding body that rotates while contacting the outer peripheral surface of the tube body 21 is arranged at equal intervals, for example, at 120 ° or 90 ° intervals. Alternatively, an arbitrary configuration such as a configuration in which the rotating body 40 is configured to rotate around the inner peripheral surface of the tube 21 as a rotation axis may be employed.

On the other hand, the control unit 5 includes an operation box 51 for operating the rotation of the rotating body 40 of the welding apparatus main body 4, a control device 52 for controlling welding conditions and the like, a TIG welding machine 53, and an argon gas for TIG welding. A gas regulator 54 for supplying an inert gas such as a gas and a gas cylinder 55 are provided.

In this case, the operation box 51 for controlling the rotation of the rotating body 40 of the welding apparatus main body 4 is used for starting and stopping the rotation of the rotating body 40, switching between automatic operation and manual operation, switching between forward and reverse rotation, and the like. It is configured so that it can be performed by button operation.

As the TIG welding machine 53, a general-purpose welding machine can be used. However, since the welding penetration is deep and the electric capacity of the welding electrode 45 becomes large, the welding electrode 4 can be used.
Set the 5 side to the DC minus side. Further, in order to improve the quality and accuracy of welding at the contact portion between the partition wall 22 and the tube 21, it is important to increase the straightness of the arc, and for this purpose, it is necessary to increase the welding current.
In this case, a low-frequency pulse current is used as a welding current so that the tube 21 having a smaller thickness than the partition wall 22 can be welded without causing a defect in the tube 21.
It is desirable to reduce welding heat input to the tube 21.

Using this welding apparatus, first, a pipe 21 is provided through a through hole formed in a partition wall 22. In this case, the partition wall 22 and the tubular body 21 are fixed with a predetermined accuracy by using an appropriate auxiliary jig or performing partial temporary welding. The pipe 2 is provided on the outer peripheral surface of the pipe 21.
A rotating body 40 composed of a cylindrical inner tube 41 and an outer tube 42 is mounted from above the tube 21 so as to rotate about the rotation axis 1. By driving the motor 47, the rotating body 40 is rotated, whereby the welding electrode 45 is held on the tube 21 as a rotation axis, and the distance between the welding electrode 45 and the surface of the partition wall 22 is kept constant. And rotate it. At the same time, the TIG
The welding electrode 45 is supplied while supplying and discharging an inert gas for welding and forming an atmosphere of the inert gas near the holding portion 21a.
By supplying a welding current to the partition wall 22 and the pipe 21
Fillet weld the contact area of

In this case, by disposing the heat radiating member 6 having an outer diameter substantially equal to the inner diameter of the tube 21 in the tube 21 near the holding portion 21a, the heat input to the tube 21 can be radiated. The tube 21 can be quickly released to the member 6, and it is possible to prevent the tubular body 21 from being blown due to heat input by welding. Further, by setting the welding electrode 45 side to the DC minus side, the penetration of welding is deepened and the welding electrode 4
5 can be increased in electric capacity. In addition, by using a low-frequency pulse current for the welding current,
The heat input to the pipe 21 can be reduced, and the pipe 21 having a smaller thickness than the partition wall 22 can be welded without causing any defects in the pipe 21. Conversely, this effect is exerted even when the wall thickness of the partition wall 22 is smaller than that of the pipe body 21, and welding can be performed without causing a defect in the partition wall 22.

In the present embodiment, the tubular body 21 is formed by arranging seven bottomed tubular bodies in a staggered manner, but the shape, number and arrangement of the tubular bodies 21 are appropriately selected. Can,
It is not limited to this. Magnetic element 23
Is a plurality of magnets 23a and the magnets 23a
Is formed to have a length substantially equal to the entire length of the tube 21. Multiple magnetic elements 23
By fixing the ends of the magnetic elements 23 to the substantially circular connecting plate 24 with bolts 23c and operating the gripping portions 25a via the rods 25, all the magnetic elements 23 are
It is possible to selectively position them collectively in either the inside or the inside of the cylinder 26. In this case, it is desirable to selectively position the magnetic element 23 in either the tube 21 or the tube 26, and to provide a fixture (not shown) for maintaining the state at an appropriate position. As the fixing tool, for example, a snap-type fixing tool may be used, and this fixing tool may be provided, for example, at a position where the end surface member 26a of the cylindrical body 26 and the connecting plate 24 face each other. It is not limited.

A seal member such as an O-ring is provided at the sliding portion between the end member 26a of the cylinder 26 and the rod 25.
As described later, it is desirable that the inside of the cylindrical body 26 be maintained in a sealed state, including the connection with the adjacent member. As a result, the magnetic element 23 of the fine iron powder removing device placed in an inferior environment of high temperature and humidity may rust,
Corrosion can be prevented.

The connection between the inlets 11 and outlets 12 of the main body 1 and the raw material supply pipe (not shown), the connection between the opening 13 of the main body 1 and the cylindrical body 22a having the peripheral edge of the partition wall 22 extending upward. In this embodiment, the connection between the cylindrical body 22a and the cylindrical body 26, the connection between the cylindrical body 26 and the support cylindrical body 27 of the drive mechanism 3 described later, and the connection between the opening 14 of the main body 1 and the inspection lid 15 are each made up of respective members. The flanges formed on the end faces of the joints are abutted with each other via a sealing member, and both flanges are fastened with a band-shaped clamp. The connection is made using a so-called ferrule joint. However, the present invention is not limited to this as long as it can be performed.

The magnetic elements 23 located in the tube 21 act on each other to act on each other.
Is strongly pressed against the inner surface of the tube 21,
Even if a large frictional force is applied, the rod 25 is forcibly slid so that the operation of moving the magnetic element 23 from the inside of the tube 21 to the inside of the cylinder 26 can be performed smoothly without a large force. A driving mechanism 3 for enabling the above is provided.

As shown in detail in FIG. 5, the drive mechanism 3 includes an operation rod 31 pivotally supported by a shaft 31a provided on a bracket 27a of a support cylinder 27 connected to an upper part of the cylinder 26. An elevating member 32a formed with a concave portion 32c into which a spherical action portion 31b formed at an end of the operating rod 31 is fitted.
A rod guide member 32f disposed inside the elevating member 32a and moving up and down along the rod 25 in accordance with elevating the elevating member 32a with a predetermined degree of freedom;
A ball member 32d fitted into an annular groove 32b slightly upwardly formed on the upper side of the ball member 32d, and a detachment preventing member 32e of the ball member 32d.

The drive mechanism 3 pushes down the distal end of the operating rod 31 downward, so that the groove 32b of the elevating member 32a is
The ball member 32d fitted inside is pressed against the surface of the rod 25, and holds the rod 25 by the frictional force.
Forcibly slide upward by a predetermined distance together with the rod guide member 32f. When the tip of the operating rod 31 is lifted upward, the ball member 32d fitted in the groove 32b of the elevating member 32a is
The lifting member 32a, the ball member 32d, the disengagement prevention member 32e, and the rod guide member 32f are all forced to slide downward along the rod 25 by a predetermined distance, leaving the rod 25 and leaving the rod 25. To return to the initial state (however, only the rod 25 is slid upward by a predetermined distance). Then, by repeating the operation of pushing down the tip of the operating rod 31 downward and the operation of lifting it upward, the rod 25 is slid upward little by little, thereby moving the inside of the tube 21 of the magnetic element 23 into the tube 26. Can be smoothly performed without requiring a large force. The operation of moving the magnetic element 23 from the inside of the cylindrical body 26 to the inside of the tubular body 21 is performed by a grip 25 a provided at the tip of the rod 25.
Can be performed smoothly without requiring a large force.

According to the drive mechanism 3, there is no need to machine the rod 25 into a special shape, so that the machining cost can be reduced and the rod 25 is not worn and the durability of the apparatus can be improved. Becomes Further, since the surface of the rod 25 can be maintained in a smooth state, the cylindrical body 26
The inside can be easily held in a sealed state.

The drive mechanism 3 is not limited to the one in this embodiment as long as it can hold the rod 25 and can slide it forcibly. For example, the drive mechanism 3 shown in FIGS. 3 can be applied.

The drive mechanism 3 shown in FIG. 6 includes an operating rod 31 pivotally supported by a shaft 31a provided on a bracket (not shown) of a support cylinder 27 connected to the upper part of the cylinder 26. , An axially acting portion 3 formed at the end of the operating rod 31
Cam member 33b formed with a long hole 33d into which 1b fits
And a rod guide member 33a that pivotally supports the cam member 33b by a shaft 33c and moves up and down along the rod 25.
And a spring member 33e for urging the rod guide member 33a downward.

The driving mechanism 3 pushes the tip of the operating rod 31 downward, whereby the cam member 33b is pressed against the surface of the rod 25, and the frictional force of the
And forcibly slide upward together with the rod guide member 33a by a predetermined distance. When the tip of the operating rod 31 is lifted upward, the pressing of the cam member 33b against the surface of the rod 25 is released, and the rod guide member 33 is left, leaving the rod 25.
a and the cam member 33b are forcibly slid downward along the rod 25 by a predetermined distance, and are initially in an initial state (however, only the rod 25 is slid upward by a predetermined distance). Return to. Then, by repeating the operation of pushing down the tip of the operating rod 31 downward and the operation of lifting it upward, the rod 25 is slid upward little by little, thereby moving the inside of the tube 21 of the magnetic element 23 into the tube 26. Can be smoothly performed without requiring a large force. The other functions of the drive mechanism 3 are the same as those of the drive mechanism 3 of the above embodiment.

The drive mechanism 3 shown in FIG.
An operating rod 31 pivotally supported by a shaft 31 a provided on a bracket (not shown) of a support cylinder 27 connected to an upper part of the operating rod 31, and a shaft-shaped operating portion 31 formed at an end of the operating rod 31.
A rod guide member 34a that is supported by the rod b and moves up and down along the rod 25, and a spring member 34b that urges the rod guide member 34a downward.

The driving mechanism 3 pushes down the distal end of the operating rod 31 downwardly, so that the rod guide member 34a
Is pressed against the surface of the rod 25, the rod 25 is held by the frictional force, and is forcibly slid upward by a predetermined distance. When the tip of the operating rod 31 is lifted upward, the rod guide member 34a
Is released from being pressed against the surface of the rod 25,
The rod guide member 34a forcibly slides along the rod 25 a predetermined distance downward, leaving the rod 25,
It returns to the initial state (however, only the rod 25 is slid upward by a predetermined distance). And
By repeating the operation of pushing down the tip of the operating rod 31 downward and the operation of lifting it upward, the rod 2
5 by sliding the magnetic element 2 upward.
The moving operation from the inside of the tube 21 to the inside of the tube 26 can be smoothly performed without requiring a large force. The other functions of the drive mechanism 3 are the same as those of the drive mechanism 3 of the above embodiment.

The drive mechanism 3 shown in FIG.
The rod 25 can be forcibly slid by holding the rod 25 by using a pinion mechanism. The rod 25 is supported by a support cylinder 27 connected to the upper part of the cylinder 26 and is supported by a handle (not shown). A pinion 35a is disposed on a drive shaft 35b that is driven to rotate, and a rack 25b that meshes with the pinion 35a is formed on the rod 25.

The drive mechanism 3 rotates the pinion 35a via a drive shaft 35b supported by the support cylinder 27, thereby holding the rod 25 on which the rack 25b meshed with the pinion 35a is held. Is to be slid upward.

The apparatus for removing fine iron powder configured as described above is usually arranged in the middle of the raw material supply path in order to remove the fine iron powder mixed in the raw material of the food industry, the chemical industry, the ceramic industry, etc. from the raw material. The surface of a plurality of pipes 21 made of a non-magnetic material in which a magnetic element 23 is disposed inside with fine iron powder mixed in the raw material when the raw material passes through the main body 1. To remove fine iron powder from the raw material. In this case, since the tubular body 21 is configured by a bottomed member formed by piercing the center of a round bar made of a material, the tubular body 21 becomes
Even if the raw material flowing around the pipe 21 is subjected to abrasion or corrosive action, a pinhole is not formed, the bottom plate is separated, and the magnetic element 23 is not rusted or corroded. When the outer diameter of the holding portion 21a is increased so that the thickness of the holding portion 21a formed by the partition wall 22 of the pipe 21 is increased, the pipe 21 is welded to the partition wall 22 and held. No defects occur in the body 21. When the amount of the fine iron powder adsorbed on the surface of the tube 21 increases, the adsorbing ability of the fine iron powder decreases, so that the fine iron powder adsorbed on the surface of the tube 21 is periodically removed. However, during this maintenance, the supply of the raw materials is stopped, and then the magnet body 2 is separated from the main body 1. Then, the magnetic element 23 is slid from the inside of the tube 21 to the inside of the tube 26 via the rod 25 and the connecting plate 24, and
After the magnetic force does not act on the surface of the tube 21, the fine iron powder adsorbed on the surface of the tube 21 is removed by washing the tube 21 with a cleaning solution or the like. In this case, a large frictional force acts because the magnetic elements 23 located inside the tube 21 are strongly pressed against the inner surface of the tube 21 by the action of the magnetic force between the magnetic elements 23.
By forcibly sliding the rod 25 by the driving mechanism 3 for holding the rod 25 and forcibly sliding,
The operation of moving the magnetic element 23 from the inside of the tube 21 to the inside of the cylinder 26 can be smoothly performed without requiring a large force. Thereafter, by pushing down the grip portion 25a provided at the tip of the rod 25, the magnetic element 23 is slid from the inside of the cylindrical body 26 into the tubular body 21 via the rod 25 and the connecting plate 24, and the magnetic force is applied to the surface of the tubular body 21. After that, the magnet body 2 is attached to the main body 1,
Complete maintenance.

[0040]

According to the fine iron powder removing apparatus of the present invention, the raw material of the food industry, the chemical industry, the ceramic industry, etc., particularly the high quality, in which the fine iron powder is mixed, is manufactured by using the fine iron powder removing apparatus having an extremely simple structure. When the raw material with viscosity passes through the main body, the fine iron powder mixed in the raw material is adsorbed on the surface of a plurality of tubes made of a non-magnetic material in which a magnetic element is arranged, thereby removing the raw material from the raw material. The fine iron powder can be easily removed, and at the time of maintenance, the magnet body is separated from the main body as necessary, and the magnetic element is slid into the cylinder holding the tube to maintain the tube. After preventing the magnetic force from acting on the surface, the tube body is washed away with a cleaning solution, etc., so that the fine iron adsorbed on the surface of the tube body can be kept attached to the main body or separated from the main body. Easy powder One can be completely removed. Therefore, manufacture and maintenance of the apparatus are easy, and initial costs and running costs can be reduced. In particular, since the tubular body is formed of a bottomed member formed by piercing the center of a round bar of the material, the wear of the tubular body due to the raw material flowing around the tubular body due to long-term use is reduced. Even if it is subjected to a corrosive action, a pinhole is formed, the bottom plate is detached, and the expensive magnetic element is not rusted or corroded, so that the durability of the device can be improved.

In addition, by forming the outer diameter of the holding portion large so that the thickness of the holding portion formed by the partition wall of the tube is increased, when the tube is welded to the partition and held, defects in the tube body may occur. Does not occur, the strength of the welded part of the tube is improved,
The durability of the device can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a fine iron powder removing device of the present invention.

FIG. 2 is a top plan view of the same.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view of a main part of FIG.

5A and 5B show a driving mechanism, and FIG.
(B) is a front sectional view, and (c) is a (b) principal part sectional view.

6A and 6B show a modified example of the drive mechanism, wherein FIG. 6A is an upper plan sectional view, and FIG. 6B is a front sectional view.

7A and 7B show a modified example of the drive mechanism, wherein FIG. 7A is an upper cross-sectional plan view, and FIG. 7B is a front cross-sectional view.

FIG. 8 is a front sectional view showing a modification of the drive mechanism.

FIG. 9 is a front sectional view showing a tubular body.

FIG. 10 is a front sectional view showing a main part of a welding device for welding a pipe and a partition wall.

FIG. 11 is a sectional view taken along line BB of FIG. 10;

FIG. 12 is a schematic view showing an outline of a welding device for welding a pipe and a partition.

[Description of Signs] 1 Main body 11 Inflow port 12 Outflow port 13 Opening 2 Magnet body 21 Tube 22 Partition wall 23 Magnetic element 24 Connecting plate 25 Rod 26 Cylindrical body 3 Drive mechanism

Claims (2)

[Claims] An inlet (11) for introducing a raw material mixed with fine iron powder and an outlet (12) for discharging the raw material are located in a main body (1) provided in a raw material supply passage. A plurality of tubes (21) made of a non-magnetic material, a partition (22) for holding each tube (21), and each tube (21)
And a tubular body (2) having substantially the same length as the tubular body (21).
6), a magnetic element (23) that slides between the inside of the tube (21) and the inside of the cylinder (26), and each magnetic element (2).
3) A connecting plate (24) to which the end is fixed, and a connecting plate (24) for selectively positioning the magnetic element (23) in either the tube (21) or the tube (26). (2) composed of a rod (25) for moving the rod
A fine iron powder removing device comprising: a tubular body (21) formed of a bottomed member formed by piercing a center of a round bar made of a material. 2. The holding portion (21) such that the thickness of the holding portion (21a) formed by the partition wall (22) of the tube (21) is increased.
2. The method according to claim 1, wherein the outer diameter of a) is increased.
The fine iron powder removing device described in the above.