JP2001347185A - Magnet filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnet filter which can remove not only magnetic foreign matter but also nonmagnetic foreign matter contained in various kinds of powder or the like and further which can automatically inform of time period for removing the magnetic foreign matter attached onto a magnet, etc. SOLUTION: The magnet filter for removing metallic foreign matter contained in various kinds of powder, particulate, fluid or the like is distinguished by being provided with a magnet 22 for attracting and removing metallic foreign matter, a magnetic sensor 23 for detecting adhesion of the metallic foreign matter to the magnet 22 or passage thereof around the magnet 22 and an alarm means 24 which is connected with the magnetic sensor 23 and informs of adhesion of the metallic foreign matter to the magnet 22 or passage thereof around the magnet 22 based on a signal from the magnetic sensor 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to various powders, granules,
The present invention relates to a magnet filter for removing metallic foreign matter contained in a fluid or the like. More specifically, a magnetic filter is provided to detect disturbance of a magnetic field around a magnet by arranging a magnetic sensor, thereby facilitating the removal of metallic foreign matter. About.

[0002]

2. Description of the Related Art Conventionally, a magnet filter has been used to remove magnetic foreign substances in various powders, granules, and fluids (hereinafter, referred to as "various powders"). By using this, it is possible to automatically remove magnetic foreign matter mixed in various powders and the like.

That is, in the conventionally used magnet filter, generally, various powders and the like pass through an apparatus main body in which a magnet is disposed, and the various powders pass through the apparatus main body. The magnetic foreign matter contained in the powder is absorbed by the magnet, thereby making it possible to remove the magnetic foreign matter contained in various powders and the like.

[0004]

However, in such a conventional magnet filter, a method of removing magnetic foreign matter only by the magnetic force of a magnet is employed, so that copper, aluminum, brass, or non-magnetic foreign matter is used. There is a problem that it is difficult to effectively remove stainless steel and the like.

[0005] In the conventional magnet filter,
Since only the magnet was used to adsorb the magnetic foreign matter and there was no means for reporting the mixing of the magnetic foreign matter, it was not possible to automatically detect that the magnetic foreign matter was mixed in various powders.

Further, when the magnetic foreign matter is adsorbed and removed by the magnet, the adsorbing force of the magnet is gradually reduced as the magnetic foreign matter is adsorbed by the magnet, and the magnet loses the adsorbing ability when exceeding a certain limit. However, it is necessary to remove the magnetic foreign matter adsorbed on the magnet, but the conventional magnet filter does not have a means for notifying the mixing of the magnetic foreign matter as described above. Had to be visually inspected, which required a worker for visual inspection, while the determination of the timing to stop the device required experience, etc., which also resulted in high costs. Was.

As is well known, a magnetic field is generated around the magnet, and when a metal or the like passes through the magnetic field, the magnetic field is disturbed. However, the disturbance of the magnetic field is caused by non-magnetic metal that is not adsorbed by the magnet. It also occurs when passing through a magnetic field.

Therefore, the present invention focuses on the disturbance of the magnetic field generated when a metal passes around the magnet, and the conventional magnet filter is provided with a magnetic sensor for detecting the disturbance of the magnetic field. It can remove not only magnetic foreign matter, but also non-magnetic foreign matter contained in various powders, and can automatically detect the mixing of metal foreign matter. It is an object of the present invention to provide a magnet filter that can automatically notify.

[0009]

The magnet filter of the present invention is a magnet filter for removing metallic foreign matter contained in various powders, granules, granules, etc., and adsorbs and removes metallic foreign matter. A magnetic sensor for detecting adhesion of metal foreign matter to the magnet or passage around the magnet, and a magnet for metal foreign matter based on a signal from the magnetic sensor connected to the magnetic sensor. Alarm means for notifying the attachment to the magnet or the passage around the magnet.

As described above, in the magnet filter of the present invention, in addition to the magnet for adsorbing the magnetic foreign matter, when the metal foreign matter adheres to the magnet, or when the metal foreign matter passes around the magnet and the magnetic field around the magnet is generated, the magnetic field around the magnet is reduced. A magnetic sensor for detecting the disturbance is provided, and a notifying means is provided for notifying the adhesion of the metallic foreign matter to the magnet or the passage around the magnet based on a signal from the magnetic sensor. .

Therefore, when magnetic foreign matter is mixed in various powders, not only the magnetic foreign matter is adsorbed, but also
The contamination can be automatically known, and even when non-magnetic metal foreign matter is mixed in various powders, it can be easily known. Can also be easily removed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnet filter according to the present invention will be described. FIG. 1 is a block diagram showing the configuration of the present embodiment. In FIG. The apparatus main body 21 is provided with a round bar-shaped magnet 22 for adsorbing magnetic metallic foreign matter.

In addition, a magnetic sensor 23 is disposed near the magnet 22 for detecting the adhesion of the metallic foreign matter to the magnet 22 or the disturbance of the magnetic field around the magnet 22 due to the passage of the metallic foreign matter around the magnet. I have.

The magnetic sensor 23 is connected to a control unit 24 provided with a notification means such as a buzzer and a display, and a power supply 25 is connected to the control unit 24. When the surrounding magnetic field is disturbed and an abnormal signal is sent from the magnetic sensor 23, the control unit 24 controls the notification unit to issue an alarm or the like.

When removing metallic foreign matter mixed in various powders and the like in this configuration, the various powders and the like are introduced into the apparatus main body 21 and the taken in various powders and the like are removed from the apparatus main body 21. After passing through the apparatus body 21
Discharge more.

At this time, when the metallic foreign matter having magnetism is mixed with various powders, the metallic foreign matter is adsorbed by the magnet 22 and the magnetic sensor 23 is disturbed by the magnetic sensor 23 to the control unit 24. An abnormal signal is sent, whereby the notifying means operates to notify the mixing of the metallic foreign matter.

Further, even when a non-magnetic metal foreign matter is mixed, the magnetic sensor 2 may be disturbed by the disturbance of the magnetic field.
The signal from No. 4 becomes an abnormal signal, whereby the notifying means is operated, and it is possible to know that metal foreign matter has entered.

The structure of the magnet 22 is not particularly limited, and may be any member having a magnetic force.
The structure of the magnetic sensor 23 is not particularly limited, either.
Any device can be used as long as it can detect the disturbance of the magnetic field.

[0019]

Next, a detailed example of the magnet filter of the present invention will be described with reference to the drawings. FIG. 2 is a diagram for explaining the structure of the magnet filter 1 of the present embodiment. Is a housing used to allow various powders and the like to pass through and to remove foreign substances contained in the various powders and the like.

Here, FIG. 2 is a perspective view showing the housing 2, and as shown in the figure, in this embodiment, the housing 2 has a substantially box shape. At the same time, an opening is formed in the upper part, and this opening is an intake part 3 for introducing various powders and the like into the housing.

Further, the side wall of the lower portion is inclined inward, and an opening is formed at the tip of the inclined side wall, and the opening serves as a discharge portion 4 for various powders.

As shown in FIG. 2, a damper 5 is movably mounted on the discharge section 4, and various powders and the like passing through the casing 2 pass through the damper 5. It is configured to be discharged to the outside of the housing 2. Therefore, by changing the direction of the damper 5, it is possible to discharge various powders to different locations.

Next, in the figure, reference numeral 6 denotes a first magnetic sensor. In this embodiment, three bar-shaped magnetic sensors 6 are arranged in parallel near the upper portion inside the housing 2, and
Thus, when a metal foreign matter has passed around the first magnetic sensor 6, the passage of the foreign metal can be sensed.

Below the first magnetic sensor 6, there is provided a rod-shaped magnet 7 serving as a magnetic foreign matter adsorbing means.
When the magnetic foreign matter is contained in various kinds of powder or the like passing through the inside of the housing 2, the magnetic foreign matter can be adsorbed.

Further, below the magnet 7, three bar-shaped second magnetic sensors 8 are arranged in parallel, whereby metal foreign matter has passed around the second magnetic sensor 8. In this case, it is possible to detect the passage.

In FIG. 2, reference numeral 9 denotes a frame for supporting the housing 2, and a control panel 10 having a control unit is further mounted on the frame 9.

FIG. 4 is a block diagram for explaining a control system according to the present embodiment. In this embodiment, the first magnetic sensor 6 and the second magnetic sensor 8 are provided to the control unit 11. The controller 11 is connected to the controller 11 so that the controller 11 can detect the disturbance of the magnetic field around the first magnetic sensor 6 and the second magnetic sensor 8.

The control unit 11 is connected to the damper 5, and further, a buzzer or a display unit, etc., and a power supply 14 are connected as notification means 12. Then, at least when an abnormal signal is sent from the second magnetic sensor 8, the control unit 11 controls the damper 5 to operate.

When there is no abnormal signal from the first magnetic sensor 6 and no abnormal signal from the second magnetic sensor 8, the control unit 11 removes foreign matter passing around the first magnetic sensor 6 by a magnet. It is determined that it has been adsorbed on the device and the notification means 12 is activated.

The operation of the magnetic filter of the present embodiment configured as described above will be described. To remove foreign substances contained in various powders and the like in the present embodiment, first, a switch is turned on in the control panel 10. After that, various powders and the like are poured into the casing 2 through the intake section 3 of the casing 2, and the various powders and the like poured into the casing 2 are passed through the casing 2. It is discharged from the housing 2 via the discharge part 4 and the damper 5.

At this time, if various kinds of powder or the like contain metal foreign matter, first, when the foreign matter passes around the first magnetic sensor, a magnetic field around the first magnetic sensor 6 is generated. And an abnormal signal is sent from the first magnetic sensor 6 to the control unit 11.

Next, when the foreign matter is a magnetic foreign matter, the magnetic foreign matter passes through the first magnetic sensor 6 and is then attracted to the magnet 7 disposed below the first magnetic sensor 6. Then, the notifying means 12 operates to notify the attraction to the magnet 7.

On the other hand, when the foreign matter is a non-magnetic foreign matter,
If the magnetic foreign matter is not attracted to the magnet 7 for any reason, or if the magnetic foreign matter that has been attracted to the magnet 7 falls off the magnet 7 for any reason, the foreign matter is disposed below the magnet 7. When passing around the second magnetic sensor 8, the magnetic field around the second magnetic sensor 8 is disturbed, and an abnormal signal is sent from the second magnetic sensor 8 to the control unit 11.

Then, the control section 11 controls the damper 5 to operate it, whereby the damper 5 moves and changes its direction, and replaces various powders containing foreign matter with various powders containing no foreign matter. Discharge to a different location.

If an abnormal signal is sent from the first timing sensor 6 and no abnormal signal is sent from the second magnetic sensor 8, as described above, the The notification means 11 such as a buzzer and a display means is operated. FIG. 4 is a flowchart showing this operation.

As described above, the magnet filter according to the present embodiment uses two types of magnetic sensors to detect the disturbance of the magnetic field around each magnetic sensor. The control section controls the operation of the damper, or makes the notification means such as a buzzer operable. Therefore, according to the present embodiment, even if a non-magnetic metal that is not adsorbed by the magnet is included, it can be effectively removed.

Further, since the notifying means is operated by the abnormal signal from the magnetic sensor, it is possible to easily know that the foreign matter has been attracted to the magnet, and further, it is possible to remove the foreign matter which has been attracted to the magnet in a timely manner. In addition, since it is possible to easily detect occurrence of unnecessary foreign matter, it is possible to take an immediate measure for preventing foreign matter from entering.

The magnet filter of the present invention
In addition to a magnet for adsorbing magnetic foreign matter, it is equipped with a magnetic sensor for detecting disturbance of the magnetic field around the magnet, and is also provided with a notifying means that operates based on an abnormal signal from the magnetic sensor. Therefore, it is not always necessary to adopt the configuration as in the above-described embodiment.

The structure of the magnet 7 is not particularly limited, and may be any member having a magnetic force. Further, the structure and the like of the magnetic sensors 6 and 8 are not particularly limited, and any structure can be used as long as the disturbance of the magnetic field can be detected and an abnormal signal can be sent to the control unit or the like when the magnetic field is disturbed. But it is good.

[0040]

According to the magnet filter of the present invention, in addition to the magnet for adsorbing the magnetic foreign matter, when the metal foreign matter adheres to the magnet, or when the metal foreign matter passes around the magnet, the magnetic field around the magnet is disturbed. And a notifying unit for notifying, based on a signal from the magnetic sensor, adhesion of a metallic foreign matter to the magnet or passage around the magnet based on a signal from the magnetic sensor.

Therefore, when a magnetic foreign substance is mixed in various powders, not only the magnetic foreign substance is adsorbed, but also
The contamination can be automatically known. Also, even when non-magnetic metal foreign matter is mixed in various powders,
This can be easily known, and it is also possible to easily remove non-magnetic metal foreign matters.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a structure of an embodiment of the present invention.

FIG. 2 is a diagram showing the structure of one embodiment of the present invention.

FIG. 3 is a diagram for explaining a housing used in one embodiment of the present invention.

FIG. 4 is a diagram for explaining a control system in one embodiment of the present invention.

FIG. 5 is a flowchart for explaining the operation of one embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 magnet filter 2 housing 3 intake section 4 discharge section 5 damper 6 first magnetic sensor 7 magnet 8 second magnetic sensor 9 frame body 10 control panel 11 control section 12 notification means 21 apparatus main body 22 magnet 23 magnetic sensor 24 control Department

Claims (1)

[Claims] 1. A magnet filter for removing metallic foreign matter contained in various powders, granules, fluids and the like, wherein the magnet is for adsorbing and removing metallic foreign matter.
A magnetic sensor (23) for detecting the adhesion of a metallic foreign matter to the magnet (22) or passing around the magnet (22); and the magnetic sensor (23) connected to the magnetic sensor (23). A) a warning means (24) for notifying, based on a signal from (1), the adhesion of metallic foreign matter to the magnet (22) or the passage around the magnet (22).