JPH0824171A - Cleaner for ignitable powder - Google Patents

Abstract

PURPOSE:To safely remove ignitable powder by arranging a wire gauze in a center part of a chamber so that the wire gauze is dipped in water, and providing a pipe connected to a suck-up means on an upper side wall, and a porous pipe connected to an static electricity preventing hose to a lower side wall. CONSTITUTION:A chamber 1 is moved to a job side where rare earth metal powder is scattered around, and after an upper cover 10 is set to the chamber 1, a turbo-blower 5 is started. Air in the chamber 1 is sucked up through a metal pipe line 3 so as effect a vacuum in the chamber 1, and air is sucked up from the opening end of a static electricity preventing hose 9 through water 20. At this time, if the opening end of the hose 9 is brought around rear earth metal powder scatted over a floor or the like, the rare earth metal powder is sucked into the hose 9 together with air. Sucked air containing the rare earth metal powder flows through a metal pipe, and is discharged into water from the pores of the pipe 6, at least in the form of air bubbles. Although a slight volume of the rare earth metal powder floats in the upper space of the chamber 1, a water cut-off cover 4 can prevent the rare earth metal powder from entering the blower 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning and removing highly ignitable powder, especially rare earth metal powder, scattered on the floor or the like.

[0002]

2. Description of the Related Art In the process of manufacturing rare earth magnets, when cleaning rare earth metal powder spilled around the manufacturing equipment, using a normal household or commercial suction type vacuum cleaner, the rare earth metal powder is extremely flammable. Is strong, and instantly ignites in the vacuum cleaner. For this reason, people either wiped it with a damp cloth or gently swept it with a broom.

[0003]

As described above, cleaning work is inefficient and relies on dangerous manual work. For this reason, the manufacturing equipment must be stopped during the cleaning work,
There is a problem of reduced production. In addition, there is always a danger of fire, which involves burns of workers and fire of equipment.

According to the present invention, scattered rare earth metal powders can be easily and surely cleaned as if using a household electric vacuum cleaner.
The object is to provide a device that can be removed.

[0005]

In order to achieve the above object, the present invention is an apparatus for cleaning and removing highly ignitable powder, in which a wire mesh is installed horizontally in the center of the inside of a closed chamber, A side wall is inserted through the pipe, a pipe connected to an external suction means, and a cover that covers the opening in the chamber of the pipe to face each other are installed, and the tip of the insertion portion in the chamber is sealed in the lower portion, A pipe having a plurality of small holes on its side surface is inserted and installed, an antistatic hose is connected to the other end of the member raised to the chamber height of the pipe, and water is soaked as to immerse the wire mesh inside the closed chamber. It has a technical means characterized by holding.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a vacuum cleaner according to the present invention is shown in FIGS.
I'll explain it first. FIG. 1 is a view showing a cross section of a main part of a vacuum cleaner for rare earth metal powder of the present invention, and FIG. 2 is A- of FIG.
It is a figure which shows the A cross section. 1 is vertical 500 with the top open
It is a steel chamber in the shape of a rectangular parallelepiped having a size of mm, a width of 500 mm, and a height of 800 mm, and has a shield structure capable of storing water inside. A drain cock 22 is provided on the bottom plate. A wire mesh 2 that covers the cross section of the chamber 1 is detachably set at a height of about 500 mm inside the chamber 1. The wire mesh used had a wire diameter of 0.21 mm and 26 mesh (opening size of about 0.8 mm x
0.8 mm), even finer ones may be used. The chamber 1 is filled with water 20 above the wire mesh 2.

A metal pipe 3 is provided on the side wall near the top of the chamber 1.
Open the piping port in the chamber and fix it. At the side wall piping opening, a draining cover 4 is installed facing the piping opening and having an open top only. An intake port of the turbo blower 5 is connected to the metal pipe 3. Turbo blower 5 is water 20
It is sufficient if it has the ability to generate a negative pressure corresponding to the height of the. In this example, 50Hz by inverter control
An hourly 1.3 Kw and an air volume of 2.5 m ³ / min were used.
The chamber 1 and turbo blower 5 are attached to the base plate 23, and four casters 2 are attached to the bottom of the base plate.
1 is provided to make it movable.

About 450 mm from the bottom side wall of chamber 1
A pipe 6 having an outer diameter of 42.7 mm, which has a total of 20 holes having an outer diameter of 8 mm on both sides, is laterally inserted into the inside with a lid at the tip, and fixed to the side wall by welding. To the other end of the pipe 6 protruding to the outside of the side wall of the chamber 1, one end of an L-shaped metal pipe 7 is connected so as to be rotatable in the circumferential direction of the pipe 6 and with a shield structure (not shown). The other L-shaped member of the metal pipe 7 has a length substantially the same as the height of the chamber 1, and the pipe 6 is provided above the chamber 1.
It is held vertically by a support metal fitting 8 installed almost directly above the insertion position. Hold the pipe 7 with a magnet or string,
It is a structure that can be easily opened when necessary (not shown). An antistatic treatment hose 9 is connected to the other end of the metal pipe 7. The antistatic treatment hose 9 may be used with an appropriate length and the other end may be left as it is, or a nozzle-shaped metal cap may be attached. Reference numeral 10 denotes an upper lid, which has a packing 11 at a position in contact with the inner surface of the chamber 1, and when the upper lid 10 is set on the upper portion of the chamber 1, the inside of the chamber is in a sealed state.

[0009]

Next, the operation of the present invention will be described. Chamber 1
Is moved to the site where the rare earth metal powder is scattered, the upper lid 10 is set in the chamber 1, and the turbo blower 5 is activated. The air in the chamber 1 is sucked through the metal pipe 3 to be a negative pressure, and the air is sucked from the open end of the antistatic treatment hose 9 through the water 20. Here, when the open end of the antistatic treatment hose 9 is brought close to the rare earth metal powder scattered on the floor or the like, the rare earth metal powder is sucked into the antistatic treatment hose 9 together with air. The air containing the sucked rare earth metal powder flows through the metal pipe 7 and is discharged from the hole of the pipe 6 into water as bubbles having an outer diameter of at least 8 mm or more.

The released bubbles rise in water and hit the wire netting 2 and explode when passing through the opening of the wire netting 2 and disappear, or
It becomes a large number of minute bubbles of 1 mm or less. Since this action is carried out in water, most of the rare earth metal powder contained in the first bubbles comes into contact with water and sinks into the water without being released into the air. Also, the trace amount of rare earth metal powder remaining in the minute bubbles is released into the air when the bubbles burst and disappear on the surface of the water, but they adhere to the particles of the surrounding water vapor and do not fly to the air as they are. Absent.

In the upper space of the chamber 1, water vapor containing a small amount of rare earth metal powder floats and is drawn toward the pipe port of the metal pipe 3, but is blocked by the drain cover 4 and enters the turbo blower 5. Absent. Therefore, the rare earth metal powder does not ignite in the turbo blower 5. Further, the hose 9 at the suction port is subjected to antistatic treatment, and the metal pipe 7 is filled with water to the same level as the chamber, and there is almost no danger of ignition here. However, even if the rare earth metal powder ignites at the tip of the antistatic treatment hose 9 or in the middle thereof, if the holding of the metal pipe 7 with the support metal 8 is released and the metal pipe 7 is laid down sideways, The water 20 can flow into the antistatic treatment hose 9 to extinguish the fire. The rare earth metal powder accumulated on the bottom of the chamber 1 can be discharged together with the water 20 by opening the cock of the drain cock 22.
Since rare earth metal powder may react with water or the like to generate hydrogen gas, safety can be improved by providing the cover 4 with the lid 33 into which the short tube 32 is inserted and which is screw-engaged.

[0012]

With the above-described structure, the present invention, like the ordinary suction type vacuum cleaner, sucks the ignitable powder scattered from the tip of the hose, but the ignitable powder sinks into the water in the chamber. However, there is no possibility that the suction means is scattered and accumulated to the suction means and the suction means is not ignited, the cleaning can be performed efficiently and safely, and the operation stop time of the manufacturing apparatus can be minimized.

[Brief description of drawings]

FIG. 1 is a view showing a cross section of a main part of a vacuum cleaner for rare earth metal powder according to an embodiment of the present invention.

FIG. 2 is a view showing a cross section taken along the line AA of FIG.

[Explanation of symbols]

1 chamber, 2 wire mesh, 4 drain cover, 5 turbo blower, 9 antistatic hose, 20 water, 22 drain cock

Claims (2)

[Claims] 1. A device for cleaning and removing highly ignitable powder, wherein a wire mesh is installed horizontally in the central portion of the inside of a closed chamber, and a side wall is inserted through the upper part of the device, which is connected to an external suction means. A pipe and a cover that covers the opening in the chamber of the pipe so as to face each other are installed, the tip of the insertion portion in the chamber is sealed in the lower portion, and a pipe having a plurality of small holes on the side surface is inserted and installed. An ignitable powder cleaner, characterized in that an antistatic hose is connected to the other end of the member raised to the chamber height of the pipe, and water is held so as to immerse the wire net in the closed chamber. 2. The vacuum cleaner for ignitable powder according to claim 1, wherein the powder having a strong ignitability is a rare earth metal powder.