JPH0146408B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for removing magnetic foreign matter mixed in a powder transfer pipe.

In piping equipment for transferring powder and granular materials, situations often occur in which magnetic foreign matter such as fine iron powder and pieces of iron are mixed into the transported powder and granular materials. There is a known device in which an opening/closing lid is provided at an appropriate position, and a permanent magnet is fixed to the opening/closing lid.

However, in a device with such a configuration, although it is possible to use a permanent magnet to attract some magnetic foreign matter mixed into the powder or granules passing through the transfer pipe, it is difficult to remove the magnetic foreign matter that has been attracted. , the worker must open the opening and closing and remove the magnetic foreign matter manually. At this time, although relatively large foreign matter can be removed, it is extremely difficult to remove fine iron powder etc. At the same time, this removal work itself has become extremely troublesome.

In addition, these problems occur because the magnetic force of the permanent magnet fixed to the opening/closing lid is always working, so instead of using the permanent magnet, it is necessary to turn the energized circuit on and off.
It is also possible to use an electromagnet operated by the oscillator, but in this case, the manufacturing cost of the device would be high and it is not a good idea. Therefore, the present invention is based on a permanent magnet with low manufacturing cost.
The advantage of the excitation type magnet is that it is possible to turn on and off the magnetic force without providing an energizing circuit, thereby making it possible to completely remove mixed magnetic foreign matter that is in an attracted state very easily. Furthermore, there is a possibility that the mixed magnetic foreign matter that is attracted by the magnet will be pushed by the flow of the powder or granule flowing inside the pipe, overcome the magnetic force, and enter the pipe again. This has been improved so that it can provide a sheltering effect to avoid being defeated by the current.

Embodiments of the present invention will be described with reference to the attached drawings. 2 is a structure in which fine iron powder, bolts, iron pieces, etc. This is the main body of the device for removing magnetic foreign matter, and in order to form a unit, connecting parts 4,
4' in the opening 5 on one side of the attachment tube 3,
A lid 7 that can be opened and closed by a hinge 6 is provided, and a lock portion 8 is provided at the upper end to maintain the lid closed. Regarding the positional relationship for installation, it is most desirable to position the magnet on the lower surface of the inclined piping as shown in the figure. The opening/closing lid 7 has a box portion 10 having a permanent magnet 9 on its outside, and an adsorption plate 11 for magnetic foreign substances such as fine iron powder is attached to the inner surface of the lid 7 in advance so as to be removably adsorbed or a fixing device is attached thereto. I will support it with etc. 15,15'
are positioning insertion pins protruding from the back surface of the upper and lower ends of the suction plate 11. It is important that the adsorption plate does not rust from the viewpoint of food hygiene, and a stainless steel plate of about 1 mm is preferable. Regarding the shape of the suction surface of the suction plate, in the first embodiment, it is a simple smooth surface, and in the second example, it is a surface with an uneven shape such as a stepped or wavy shape. Post an example. By providing a see-through window 14 on the surface of the attachment tube 3 corresponding to the opening 5, it becomes easy to directly confirm the suction situation.

As described above, in the present invention, a permanent magnet 9 is installed in the box body 10 on the opening/closing lid 7 provided at the opening 5 of the attachment tube 3, and the inner surface of the lid 7 is magnetically irradiated with fine iron powder, etc. Since the suction plate 11 that directly attracts foreign objects based on the magnetic force of the magnetic field of the permanent magnet 9 is detachably supported by suction, the opening/closing lid 7 is opened as shown in FIG. As shown by the arrow x in Figure 2, the adsorption plate 11 loses its magnetic force by gently lifting it from its horizontal state and moving it away from the magnetic field, so any magnetic foreign matter that has been adsorbed can be easily separated from the adsorption plate surface. Therefore, the removal work can be carried out reliably and extremely easily by quick and simple handling operations. Furthermore, since the suction surface of the suction plate 11 is formed with a stepped surface or an uneven surface such as a wave shape as shown in the second embodiment, the smooth plate surface will not be succumbed to the flow of powder or granules. Stepped shelter space 1 eliminates the worry of being washed away and mixed into the powder and granules again.
As shown by the arrow in FIG. 1, the powder is naturally pushed into a shelter space such as a circular arc shelter space or the like, which is not directly affected by the flow force of the powder and granules, and comes to rest. In other words, even if foreign matter is captured by magnetic attraction, it would be meaningless if it was swept away by the current and released, so by devising the shape of the attraction surface of the attraction plate 11,
The present invention provides an extremely excellent invention that maximizes the magnetic force of the permanent magnet 9 used, brings about the effect of enhancing the attraction and holding function as much as possible, and prevents machine failures before they occur.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is a partially cutaway side view, and FIG. 2 is an enlarged sectional view of the main part in the open position. DESCRIPTION OF SYMBOLS 1... Transfer pipe, 2... Magnetic foreign matter removal device main body, 3... Mounting tube, 4... Connecting section, 5... Opening, 6... Hinge, 7... Opening/closing lid, 8... Lock Part, 9... Permanent magnet, 10... Box part, 11...
Suction plate, 12...Stepped shaped surface, 13...Stepped retreat space, 14...See-through window, 15... Positioning insertion pin.

Claims (1)

[Scope of Claims] 1. An opening 5 is formed on one side of the attachment tube 3, and an opening/closing lid 7 that closes the opening 5 is supported in a freely openable/closing manner near the opening 5. A magnetic foreign matter in a powder transfer tube is characterized in that an adsorption plate 11 for attracting magnetic foreign matter is detachably attached to the inside of the lid 7, and a permanent magnet 9 is supported on the outside of the opening/closing lid 7. removal device. 2. Claim 1, characterized in that the surface of the suction plate 11 is a non-smooth surface such as a stepped or corrugated surface.
A device for removing magnetic foreign matter from a powder or granular material transfer pipe as described in 2. 3. A device for removing magnetic foreign matter from a powder transfer tube according to claim 1, characterized in that the attachment tube 3 has a see-through window section 14.