JP2932880B2 - Magnetic separator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic separation method and a magnetic separator for removing a magnetic substance mixed in powder.

[0002]

2. Description of the Related Art Conventionally, in order to remove a magnetic substance mixed in powder, a powder passage is branched in an inverted Y-shape at an upper part,
A magnetic separator has been used in which the branched passages are integrated in a Y-shape at the lower part, and a suction tool made of a magnetic material is arranged across each of the passages in the middle. In this magnetic separator, when the powder is dropped into the first passage, the second
Pull out the suction device of the passage, remove the magnetic material adsorbed on the surface by squeezing the surface of the suction device, return the suction device from which the magnetic material has been removed to the second passage, and after a predetermined time, pass the powder device. Was switched to the second passage, and this time, the work of pulling out the suction tool of the first passage and removing the magnetic material was repeated.

[0003]

In the conventional magnetic separation method described above, it is necessary to pull out a number of suction tools one by one, squeeze the surface of the suction tool one by one manually, and return the drawn suction tool to its original state. Since the removed magnetic material adheres to the surface of the glove, it is not always possible to sufficiently remove the magnetic material, resulting in a problem that the workability of the magnetic separation operation is extremely poor. Therefore, an object of the present invention is to provide a magnetic separation method and a magnetic separator capable of easily and completely removing a magnetic substance mixed in powder.

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, that is, it is movable between a two powder drop passage and a magnetic discharge chute provided between the two drop passages. And a plurality of guide tubes extending in the moving direction of the outer frame, fixed between one end and the other end in the outer frame, and having a flange on an outer surface of a central portion in the longitudinal direction, One of a pair of sliding portions provided for each guide tube is provided such that the flange is located between a pair of sliding portions made of a ferromagnetic material and inserted in the outer frame and through which the guide tube is inserted. An inner frame having one end at the other end and movably arranged in the longitudinal direction of the guide tube; a guide magnet housed in each guide tube and having a suction magnet at a central portion; A magnetic separator comprising a moving magnet or a suction tool having a ferromagnetic material at both ends facing a sliding portion formed of a body.

[0005]

When the magnet is moved to the guide tube in a portion crossing the passage of the powder and the powder is dropped, the magnetic substance mixed in the powder is adsorbed on the surface of the guide tube. After the powder was dropped for a certain period of time, the drop was stopped, and when the guide tube was moved out of the powder passage together with the magnet in the guide tube, the magnetic substance adsorbed on the surface of the guide tube also adsorbed on the guide tube surface. It moves with the guide tube as it is. Next, when only the magnet is moved in a direction crossing the flange attached to the surface of the guide tube, the magnetic material that cannot follow the movement of the magnet is separated from the surface of the guide tube and falls after the magnet has moved. In addition, the magnetic substance that follows the movement of the magnet is attracted to the magnet and moves on the surface of the guide tube, but after reaching the flange on the surface of the guide tube, it cannot follow the movement of the magnet any longer, so the magnet After traversing the flange portion, all the magnetic materials are separated from the guide tube surface and fall. Since the place where the powder falls is outside the path of the powder, the magnetic substance mixed into the powder is removed in this way.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to 3 show an embodiment of the present invention. The passage through which the falling powder passes is branched into a left passage 1 and a right passage 2 in an inverted Y-shape at the upper part. Are integrated in a Y-shape at the bottom. The frame 10 of the magnetic separator according to the present invention is interposed between the two passages 1 and 2 horizontally so as to connect the two passages 1 and 2. That is, the upper surface of the left end of the frame 10 is connected to the raw material inlet 1a of the left passage, and the lower surface of the left end is connected to the raw material discharge chute 1b of the left passage. Similarly, the upper surface of the right end of the frame 10 is connected to the material inlet 2a of the right passage, and the lower surface of the right end is the material discharge chute 2b of the right passage.
Connected to An inspection port 3a is formed on the upper surface of the central portion of the frame 10, and the lower surface of the central portion is connected to the magnetic material discharge chute 3b.

In the frame 10, rails 11 extending in the left-right direction are provided up and down and back and forth.
1 supports the outer frame 20 movably in the left-right direction. A screw 21 extending in the left-right direction is rotatably supported at an intermediate portion in the height direction between the front portion 10a of the frame and the outer frame 20, and the screw 21 is disposed outside the right portion 10b of the frame. It is rotationally driven by an outer frame moving motor 22. A nut 23 fixed to the outer frame 20 is screwed into the screw 21. When the outer frame moving motor 22 is rotationally driven in this manner, the outer frame 20 is configured to move left and right. The outer surface of the screw 21 is dust-proofed by a bellows 24, and the length of the outer frame 20 in the left-right direction is substantially equal to the distance between the centers of the two passages 1 and 2. Proximity sensors 12a and 12b are fixed to the left end and the right end of the inner surface of the front portion 10a of the frame 10, respectively. The outer frame left end proximity sensor 12a at the left end is an outer frame when the outer frame 20 moves to the left end. The right end proximity sensor 12b of the outer frame at the right end detects the left portion 20a of the outer frame 20.
Are located so as to detect the right portion 20b of the outer frame when moved to the right end.

A guide tube 25 formed of a non-magnetic material and extending in the left-right direction is provided in the outer frame 20.
The book and the lower 2 are fixed for convenience, and the middle 3 is filled so as to fill the plane section when seen through from the top and bottom.
The guide pipes 25 of the book are displaced in the front-rear direction.
Also, the lower ends of the raw material inlets 1a and 2a are squeezed so that the powder falls into a flat cross section of the guide tube 25 when viewed from above and below. It is configured to contact. Guide tube 2
A flange 26 is fixed to the center of the longitudinal direction of the flange 5.

A rail 27 extending in the left-right direction is provided before and after the lower end of the outer frame 20. An inner frame 30 is mounted on the rail 27 so as to be movable in the left-right direction. In the middle portion in the height direction between the rear portion 20c of the outer frame and the inner frame 30,
A screw 31 extending in the left-right direction is rotatably supported by a shaft, and this screw 31 is rotationally driven by an inner frame moving motor 32 arranged outside the right portion 20b of the outer frame. The screw 31 has a nut 33 fixed to the inner frame 30.
Are screwed together, and when the inner frame moving motor 32 is rotationally driven in this manner, the inner frame 30 is configured to move left and right. The outer surface of the screw 31 is dustproofed by a bellows 34, and the length of the inner frame 30 in the left-right direction is substantially half the length of the outer frame 20 in the left-right direction, that is, the magnetic material is discharged from the center of each of the passages 1 and 2. It is formed substantially equal to the distance to the center of the chute 3b. Therefore, the right portion of the inner frame 30 slides with the guide tube 25 on the right side of the flange 26 fixed to the guide tube of the outer frame. Similarly, the left portion of the inner frame 30 is larger than the flange 26 of the outer frame. It slides with the left guide tube 25. A cylindrical sliding portion 35 is formed on the inner frame 30 at a portion sliding with the guide tube 25, and the sliding portion 35 is formed of a ferromagnetic material. Proximity sensors 28a and 28b are fixed to the left and right ends of the inner surface of the rear portion 20c of the outer frame, respectively.
0 detects the left portion of the inner frame when moved to the left end, and the right end inner frame right end proximity sensor 28b is arranged to detect the right portion of the inner frame when the inner frame 30 moves to the right end. I have. Also, the frame 10 is housed so as to house the inner frame moving motor 32 when both the outer frame 20 and the inner frame 30 have moved to the right end.
The case 13 is fixed to the right part 10b of the case.

Each guide tube is provided with a suction tool 40, and a plurality of suction magnets 41 are sealed in the center of the suction tool 40 as shown in FIG. Each attracting magnet 4
1 is arranged such that the ends of the adjacent attracting magnets 41 have the same polarity so that the lines of magnetic force are emitted to the large diameter side of the attracting tool 40. A moving magnet 43a is sealed at the left end of the suction device 40 via a nonmagnetic material 42a, and similarly, a nonmagnetic material 42b is mounted at the right end of the suction device 40.
The moving magnets 43b are sealed through the outer frame, and these moving magnets 43a and 43b are respectively connected to the sliding portions 3 of the outer frame.
5,35.

This embodiment is configured as described above.
The method of using this magnetic separator will be described below. First, as shown in FIG. 2, when the outer frame moving motor 22 is rotated and the outer frame 20 is moved to the left end until the outer frame left end proximity sensor 12a is activated, the guide tube 25 is moved to the left passage 1 and the magnetic discharge chute 3.
b, and the collar 26 is a magnetic material discharge chute 3
It reaches inside the left end of b. Furthermore, the inner frame left end proximity sensor 28a
When the inner frame moving motor 32 is rotated and driven until the inner frame 30 is moved to the left end, the suction magnet 41 of the suction tool in the guide tube 25 reaches a position covering the raw material inlet 1a in the left passage. In this state, the switching damper 4 is set to the left passage side, the shut-off damper 5 is opened, and the powder is introduced into the left passage 1. When the magnetic substance mixed in the powder is introduced into the guide tube 25 at the portion where the attraction magnet 41 is located. Adsorbs on the surface.

Then, after a lapse of a predetermined time, the shut-off damper 5 is closed to stop charging the powder into the left passage 1. As shown in FIG. 5, the inner frame moving motor 32 is stopped and the outer frame right end proximity sensor 12b is stopped. The outer frame 20 is moved to the right end until is activated. Accordingly, each member such as the guide tube 25 fixed to the outer frame 20, each member such as the inner frame 30 mounted on the outer frame 20, and the suction tool 40 moving together with the inner frame 30 are all formed by the outer frame 2.
It moves to the right along with the movement of the outer frame 20 while maintaining the relative positional relationship with 0. Therefore, the magnetic substance adsorbed on the surface of the guide tube 25 is also adsorbed on the surface of the guide tube 25, and
Move with 5. Thus, the outer frame right end proximity sensor 12
b, the guide tube 25 reaches a position covering the right passage 2 and the magnetic discharge chute 3b, and the collar 26 reaches the inside of the right end of the magnetic discharge chute 3b. The magnet 41 reaches a position covered by the magnetic material discharge chute 3b.

Next, as shown in FIG.
2 moves the inner frame 30 to the right end, while stopped, until the inner frame right end proximity sensor 28b operates. As a result, the sliding portion 35 of the inner frame moves rightward without moving the guide tube 25 and the flange 26 fixed thereto, and the moving magnet 43 of the suction tool is magnetically coupled to the sliding portion 35. Therefore, the suction tool 40 also moves to the right. At this time, of the magnetic material adsorbed on the surface of the guide tube 25 at the portion where the attraction magnet 41 of the attraction tool is located, the magnetic material that cannot follow the movement of the attraction magnet 41 is left after the attraction of the attraction magnet 41 ends. Non-magnetic material 42
When the portion a has passed, it separates from the surface of the guide tube 25 and falls. The magnetic material following the movement of the attraction magnet 41 is attracted to the attraction magnet 41 and moves to the right on the surface of the guide tube 25, but reaches the flange 26 stopped inside the right end of the magnetic material discharge chute 3b. Later, when the attraction magnet 41 can no longer follow the movement of the attraction magnet 41 and the attraction of the attraction magnet 41 ends and the left non-magnetic body 42a passes, it is separated from the surface of the guide tube 25. Fall. After the attraction magnet 41 has finished traversing the flange 26 in this way,
All the magnetic material is peeled off from the surface of the guide tube 25 and falls to the magnetic material discharge chute 3b to be removed. On the other hand, when the inner frame right end proximity sensor 28b is activated, the suction magnet 41 of the suction tool in the guide tube 25 reaches a position covering the raw material inlet 2a in the right passage. Therefore, in this state, when the switching damper 4 is set to the right passage side, the shut-off damper 5 is opened, and the powder is put into the right passage 2, the magnetic substance mixed in the powder is removed from the guide tube in the portion where the attraction magnet 41 is located. Adsorbed on the surface of 25.

Then, after a lapse of a predetermined time, the shut-off damper 5 is closed to stop charging the powder into the right passage 2. As shown in FIG. 7, the inner frame moving motor 32 is stopped and the outer frame left end proximity sensor 12a is stopped. The outer frame 20 is moved to the left end until is activated. Accordingly, the suction tool 40 moves to the left along with the guide tube 25, and the magnetic material adsorbed on the surface of the guide tube 25 also moves while being adsorbed. Next, as shown in FIG. 2, the outer frame moving motor 22 is stopped, and the inner frame 30 is moved to the left end until the inner frame left end proximity sensor 28a operates. As a result, the sliding portion 35 of the inner frame moves to the left without moving the guide tube 25 and the flange 26, the suction tool 40 also moves to the left, and after the attraction magnet 41 finishes traversing the flange 26, Of the magnetic substance is separated from the surface of the guide tube 25 and the magnetic substance discharge chute 3
b. By repeating the above steps, the magnetic substance mixed in the powder can be easily and completely removed.

In this embodiment, since the present invention is applied in place of the existing magnetic separator shown in the prior art, the powder drop passage is branched into a left passage 1 and a right passage 2. Case shown. However, for example, when newly installed, the present invention can be applied without branching the passage of the powder. 1
In order to apply the present invention to a case having only one passage, for example, the left passage 1 of the present embodiment is used as the one passage,
The connection to the right passage may be closed. Alternatively, the first port is located at the position of the inspection port 3a and the magnetic material discharge chute 3b in this embodiment.
The passages may be connected to each other, and a magnetic discharge chute may be connected to the left passage or the right passage in this embodiment.

In this embodiment, the guide tube 25 is fixed in the moving direction of the outer frame 20, so that the moving direction of the outer frame 20 matches the moving direction of the inner frame 30. However, the direction in which the guide tube 25 is fixed, that is, the direction in which the inner frame 30 moves, does not necessarily need to match the direction in which the outer frame 20 moves. In the present embodiment, the sliding portion 35 of the inner frame is formed of a ferromagnetic material, and the moving magnets 43 a and 43 b are arranged at both ends of the suction tool 40. However, a magnet is used for the sliding portion 35 of the inner frame, and the suction tool 4 is used.
A ferromagnetic material can be used at both ends of 0, or a magnet can be used for both. In the present embodiment, the movement of the suction tool 40 is indirectly performed using the magnetic action, but the method of moving the suction tool 40 is not particularly problematic. For example, one end or both ends of the suction tool may be protruded from the side of the inner frame, and these may be connected by a flat plate or the like, and the flat plate may be moved.

[0017]

According to the present invention, a suction device is arranged in a guide tube having a flange, the suction device is moved together with the guide tube, and the suction device is moved across the flange of the guide tube.
A magnetic separation method and a magnetic separator capable of easily and completely removing a magnetic substance mixed in a powder.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

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

FIG. 3 is a left side view of the same.

FIG. 4 is a sectional view showing the suction device.

FIG. 5 is a plan sectional view showing the same after the outer frame has been moved to the right.

FIG. 6 is a plan sectional view showing the same after the inner frame has been moved to the right.

FIG. 7 is a cross-sectional plan view showing the same after the outer frame has been moved to the left.

[Explanation of symbols]

1 left passage 2 right passage 1
a, 2a: material inlet 1b, 2b: material discharge chute 3a: inspection port 3
b: magnetic substance discharge chute 4: switching damper 5: cut-off damper 10: frame 10a: front part 1
0b right part 11 rail 12a outer frame left end proximity sensor 12b outer frame right end proximity sensor 1
3: Case 20: Outer frame 20a: Left part 2
0b right 20c rear 21 screw 2
2 ... outer frame moving motor 23 ... nut 24 ... bellows 2
5 Guide tube 26 Flange 27 Rail 28a Inner frame left end proximity sensor 28b Inner frame right end proximity sensor 30 Inner frame 31 Screw 3
2 ... inner frame moving motor 33 ... nut 34 ... bellows 3
5: sliding portion 40: suction tool 41: magnet for suction 4
2a: Left non-magnetic material 42b: Right non-magnetic material 43a: Left moving magnet 4
3b: Right moving magnet

Claims (1)

(57) [Claims] 1. Between two falling paths for powder and between the falling paths
An outer frame movably disposed between the magnetic body discharge chute and a magnetic substance discharge chute, and an outer frame extending in the moving direction of the outer frame, and having one end and the other end in the outer frame.
A plurality of guide tubes fixed in between and having a flange on the outer surface at the center in the longitudinal direction, and a ferromagnetic body which is housed in the outer frame and has the guide tubes inserted therethrough
So that the flange is located between a pair of sliding portions consisting of
One end of a pair of sliding parts provided for each guide tube
An inner frame having the other end at the other end and movably arranged in the longitudinal direction of the guide tube; a guide magnet housed in each guide tube and having a suction magnet in a central portion ; And a suction tool having a moving magnet or a ferromagnetic material at both ends facing the sliding portion.