JPS6028091Y2 - magnetic stopper - Google Patents

Description

[Detailed description of the invention] This invention relates to a magnetic stopper that removes magnetic foreign matter by immersing a permanent magnet that is screwed onto a container or flow pipe and fixed at the tip of the bolt into a liquid, and captures and attracts magnetic foreign matter. This invention relates to a magnetic stopper with significantly improved ability to

The lubricating oil filled in the gearboxes of automobiles and various machines is contaminated with fine iron powder that is generated due to wear of gears, etc., so it deteriorates quickly and shortens the life of the gearbox. Therefore, it is necessary to remove the above-mentioned magnetic foreign matter.

Ordinary gearboxes are not equipped with a lubricating oil circulation filter, etc., so a permanent magnet is fixed to the tip of a bolt, etc., screwed onto the container wall, and the permanent magnet is inserted into the container. A method was used to remove magnetic foreign substances by adsorbing them.

However, since the magnetic force generated around the permanent magnet in the conventional magnetic stopper is weak, the adsorption capacity is low, and furthermore, the magnetic foreign matter that has been attracted and captured may separate again and float due to the flow of oil etc. in the container. In most cases, the removal efficiency was low.

This invention proposes a magnetic stopper that has a high ability to attract magnetic foreign matter and does not resuspend the captured foreign matter.

That is, the gist of this invention is a magnetic plug in which a wire mesh made of fine ferromagnetic wire is wrapped around the circumference of the tip of the bolt so as to surround the permanent magnet of the magnetic plug.

This invention will be explained in detail below based on the drawings.

An embodiment based on this invention is shown in FIGS. 1 and 2.

The bolt 1 is screwed onto the container wall 7 and has a tip end penetrating through the container wall 7, and has a so-called rod tip shape with a cylindrical tip portion 2.

A cylindrical permanent magnet 3 is fixed to the end surface of the tip 2 to constitute a magnetic plug.

Further, the permanent magnet 3 is surrounded by a wire mesh 4 woven with ferromagnetic fine wire.

That is, a wire mesh 4 that is wide in the axial direction is wrapped around the circumferential portion of the distal end portion 2, and a ring 5 is fitted here to fix the wire mesh 4 and to enable attachment and detachment of the wire mesh 4.

With the above configuration, a large magnetic gradient is generated around the wire mesh 4 due to the magnetic field applied by the permanent magnet, and the force of attracting the magnetic foreign matter is improved.

The example shown in FIG. 2 is a case where a plurality of permanent magnets 3 are used, and a fixed rod 6 made of non-magnetic material such as brass is attached to the tip end 2.
Here, three permanent magnets 3 are attached to a fixed rod 6 at predetermined intervals, and a wire mesh 4 of a width corresponding to the permanent magnets 3 arranged in series in the axial direction is wrapped around the circumference of the tip 2. It is.

This further enhances the adsorption force of magnetic foreign matter, and as shown in the figure, the adsorption efficiency is better when the opposing poles of the upper and lower magnets 3 are the same.

The shape of the permanent magnet 3 may be any shape such as cylindrical or cubic, and the direction of magnetization may be arbitrary, and the attraction efficiency may be increased by multipolar magnetization.

Further, any wire mesh can be used as long as it is made of ferromagnetic fine wire, and the roughness of the wire mesh is selected depending on the conditions of use, but 30 to 200 mesh is preferable.

Furthermore, materials such as galvanized iron wire and 5Us4 wire are durable and economical.

On the other hand, the reason why the wire mesh 4 is fixed to the tip 2 with the ring 5 is that when removing the magnetic foreign matter that has been attracted and captured, by removing the wire mesh 4 from the bolt 1, the foreign matter can be easily removed and cleaned. It's for a reason.

Next, the attraction force of the magnetic stopper according to this invention will be explained.

The magnet is a cylindrical ferrite magnet, Br=4100 (
G), HC=2800 (Oe), (BH) max=
It has magnetic properties of 4.0 (M, G, Oe), has a diameter of 2 mm, and a height of 1 ow IL.

In a conventional magnetic stopper using this magnet, the adsorption force on the magnet surface was about five times the weight of the magnetic foreign object itself.

On the other hand, in the case of the magnetic stopper of this invention, which uses a 200-mesh wire gauze made of galvanized iron wire, the attraction force of the magnetic foreign matter was approximately 4000 times greater than its own weight, and the attraction force was significantly improved.

Therefore, the magnetic stopper of this invention has a significantly improved adsorption force that attracts weakly magnetic foreign matter that could only be attracted conventionally when the liquid in the container is stationary, and easily detaches even when the liquid is flowing. There is no drop in removal rate due to resuspension.

[Brief explanation of the drawing]

1 and 2 are longitudinal cross-sectional views of the magnetic stopper according to this invention. FIG. 1 shows the case where one magnet is used, and FIG. 2 shows the case where a plurality of magnets are used. In the figure, 1... bolt, 2... tip,
3... Permanent magnet, 4... Wire mesh, 5...
...Ring, 6...Fixing rod.

Claims (1)

[Claims for Utility Model Registration] 1. In a magnetic stopper that removes magnetic foreign matter by immersing a permanent magnet screwed into a container or flow pipe and fixed at the tip of a bolt into a liquid, a magnetic plug that removes magnetic foreign matter from a fine ferromagnetic wire surrounding the permanent magnet. A magnetic stopper made by wrapping gilt copper around the circumference of the bolt tip. 2. The magnetic plug according to claim 1, which is a registered utility model, in which a plurality of permanent magnets are arranged in multiple stages at predetermined intervals and with the same poles facing each other in the axial direction of the tip of the bolt.