JP3978691B2 - Magnetic separator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a magnetic separator that adsorbs magnetic contaminants in a liquid stored in a storage tank such as a tank.
[0002]
[Prior art]
In the liquid pressure equipment using electromagnetic force, if the liquid supplied to the liquid pressure equipment contains magnetic contaminants (fine powder of magnetic material such as iron powder), the contaminants cause the operation of the equipment. Since this may cause trouble, it is necessary to remove magnetic contaminants with a magnetic separator in advance.
[0003]
As the magnetic separator, those shown in FIGS. 4 and 5 are known.
The magnet separator 1 shown in FIG. 4 includes a permanent magnet 3 and a spacer 4 made of iron plate inserted in a cover 2 formed of stainless steel into a desired shape, and a synthetic resin 5 melted in the space of the cover 2. They are filled and integrated. Reference numerals 6 and 6 in the figure denote attachment members for attaching a handle (not shown) and the like.
However, the magnet separator 1 requires a waiting time until the molten synthetic resin 5 is solidified, and cannot proceed to the next operation such as packing until the solidification is completed. In addition, since a space to be left until solidification is required is required, there is a problem that a large space for leaving is required in the case of mass production.
Further, the melted synthetic resin 5 flows between the cover 2 and the permanent magnet 3 to increase the distance between them, so that the attractive force of the magnet separator 1 is reduced.
[0004]
The magnet separator 7 shown in FIG. 5 has the permanent magnet 3 and the spacer 4 inserted into the cover 2, covers the opening of the cover 2 with a metal bottom plate 8, and the peripheral edge of the side wall of the cover 2 and the peripheral edge of the bottom plate 8. Are integrated by welding.
However, since this magnet separator 7 requires a waiting time until the welded portion 9 cools, it has the same problem as the magnet separator 1 and requires a welding machine.
Further, a gap may be formed between the cover 2 and the permanent magnet 3 after welding, and when the gap is generated, the attractive force of the magnet separator 7 is reduced.
[0005]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a magnet separator that does not cause a decrease in attractive force due to a gap and can significantly reduce the manufacturing time.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the magnet separator of the present invention includes a permanent magnet, a magnetic spacer, and a nonmagnetic cover that covers the permanent magnet, and adsorbs magnetic contaminants in the liquid to the cover by the permanent magnet. The magnet separator includes a non-magnetic bottom plate that is press-fitted into the cover, and these members are brought into close contact with each other by press-fitting the bottom plate into the cover.
[0007]
In order to solve the same problem, the magnet separator is characterized in that a corrugated washer is provided between the spacer and the bottom plate to press the permanent magnet against the cover.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an embodiment of the present invention. This magnet separator 11 includes a cover 12 formed in a dish shape from a nonmagnetic material such as stainless steel, a permanent magnet 13 inserted into the cover 12, and A spacer 14 formed of a magnetic material (magnetic steel) and a bottom plate 15 formed of a nonmagnetic material such as aluminum die casting are provided. These members are inserted into the cover 12 by press-fitting the bottom plate 15 into the cover 12. The cover 12 and the bottom plate 15 are fixed together by mounting screws 16 and 16 that are screwed to the side surface of the bottom plate 15 through the side wall of the cover 12.
The bottom plate 15 includes a cylindrical rising portion 18 at a central portion, and a corrugated washer 19 to which elasticity is imparted by bending the waveform in the circumferential direction is attached to the upper surface of the rising portion 18. The permanent magnet 13 is magnetized in the vertical direction in the figure.
[0009]
When the permanent magnet 13 and the spacer 14 are inserted into the cover 12 and the bottom plate 15 having the corrugated washer 19 attached to the upper surface of the rising portion 18 is press-fitted into the peripheral wall of the cover 12, They are assembled closely together.
Therefore, unlike known separators in which these members are integrated by filling with synthetic resin melted or welding the cover and the bottom plate, there is no waiting time for solidification of the synthetic resin and cooling of the welded portion. Since the following operations such as packing can be performed immediately after assembly of the members, the production time can be greatly shortened, and there is no need for neglected space for solidification or cooling, so it can be produced in a narrow place. it can.
[0010]
Further, since the permanent magnet 13 is pressed against the cover 12 by the reaction force of the corrugated washer 19 provided between the bottom plate 15 and the spacer 14, there is no gap between the permanent magnet 13 and the cover 12. Even if it is used for a long time, the adsorbing power of magnetic contaminants such as iron powder by the separator 11 does not decrease.
[0011]
Since the cover 12 is formed of a non-magnetic material, it is easy to remove the magnetic contaminants adsorbed to the cover 12 by the permanent magnet 13, and if it is made of stainless steel, it can be used for a liquid having corrosive properties. Further, since the bottom plate 15 is also made of a non-magnetic material, when the magnet separator 11 is installed in a storage tank such as a tank (not shown), it is firmly adsorbed to the bottom of the storage tank and it is difficult to take it out. Never become.
Furthermore, a handle for removing the magnet separator 11 from the tank and a fixing member (both not shown) for fixing the magnet separator 11 in the tank can be attached using the mounting screws 16 and 16.
[0012]
【The invention's effect】
The magnet separator of the present invention greatly reduces the manufacturing time because there is no waiting time by press-fitting the bottom plate into the cover so that the cover, the permanent magnet, the spacer and the bottom plate are assembled in close contact with each other. And can be manufactured continuously in a narrow space.
In addition, since the permanent magnet is pressed against the cover by the corrugated washer provided between the spacer and the bottom plate, there is no gap between them, so the attractive force of the magnet separator may be reduced even after long-term use. Absent.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view taken along line AA in FIG.
FIG. 2 is a plan view of the embodiment.
FIG. 3 is a side view of the same.
FIG. 4 is a cross-sectional view of a conventional magnet separator.
FIG. 5 is a cross-sectional view of another conventional example.
[Explanation of symbols]
11 Magnet separator 12 Cover 13 Permanent magnet 14 Spacer 15 Bottom plate 16 Mounting screw 19 Corrugated washer

Claims (2)

In a magnet separator that includes a permanent magnet, a spacer of a magnetic material, and a cover of a non-magnetic material that covers these, and adsorbs the magnetic contaminants in the liquid to the cover by the permanent magnet.
The magnetic separator comprises a non-magnetic bottom plate that is press-fitted into the cover,
These members were brought into close contact with each other by press-fitting into the cover of the bottom plate, and assembled together.
Magnetic separator characterized by that. A corrugated washer was installed between the spacer and the bottom plate to press the permanent magnet against the cover.
The magnet separator according to claim 1.

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