JPH0151406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transportation and supply device that can safely transport a large amount of easily oxidizable powder or granules and safely supply them at a destination. In particular, the present invention relates to a transportation and supply device suitable for transporting and supplying easily oxidizable ferromagnetic powder or granules from a manufacturing site to a site of use.

Recently, magnetic recording media called so-called metal tapes have come into use, and various ferromagnetic metal powders and ferromagnetic alloy powders have been developed for use therein (for example, Japanese Patent Publication No. 35-3862, U.S. Patent No. 3206338, Patent No. 3865627, etc.). These ferromagnetic materials are produced by, for example, reducing iron oxide with hydrogen or a reducing gas, or reducing ferrous sulfate or a mixture of ferrous sulfate and cobalt sulfate with borohydride in a magnetic field. are doing. Immediately after production, these ferromagnetic materials are generally agglomerated into particles or lumps (hereinafter referred to as granules) with a diameter of several millimeters to several tens of millimeters, and these are transported to the magnetic tape manufacturing site where they are mixed with binders, solvents, etc. After kneading and dispersing the mixture, it is applied onto a plastic film and dried to produce a magnetic recording medium.

This type of ferromagnetic material is highly susceptible to oxidation, and there is a risk that it will oxidize and generate heat and catch fire when it comes into contact with air, requiring cumbersome means to transport it to the magnetic tape manufacturing site. For example, the ferromagnetic material is sealed in a plastic film bag and transported in a can, or the material is transported moistened with a solvent such as toluene. However, when transported in a plastic bag, there is a chance that it will oxidize when removed from the bag.
If large quantities are used, there is a risk of ignition due to heat generation, so each bag can only hold about 5 kg at most, and these cans are unpacked at the magnetic tape manufacturing site and stored in a condition that prevents contact with air as much as possible. It requires troublesome handling such as tearing open the bag and taking out the contents, and when using a solvent such as toluene, it is necessary to use a considerably large amount (1.5
(2.0 times to 2.0 times), and there was a drawback in that it required time and energy to evaporate the solvent before kneading at magnetic tape manufacturing sites. In the latter case as well, the unit that could be safely transported was approximately 5 kg, taking into consideration the oxidative heat generated during solvent treatment and solvent removal.

On the other hand, Japanese Patent Application Laid-open No. 51-91585 discloses a device for transporting and handling powder and granular materials that are likely to cause problems such as scattering and spillage and contaminate the working environment. It seems that the amount handled can be increased by increasing the amount handled, but as the amount handled increases, the risk of heat generation becomes extremely large, and even if inert gas etc. Considering the guarantee of a high level of safety during transportation, a structure was needed that could solve problems such as controllability and sealing of the on-off valve.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a conveying and supplying apparatus that can safely convey and supply a large amount of easily oxidizable powder or granular material such as ferromagnetic metal or alloy powder or granules. Another object of the present invention is to provide an apparatus for transporting and supplying easily oxidizable powder and granules, which can safely and quickly store and safely and quickly supply the above-mentioned easily oxidizable powder and granules.

As a result of various studies under the above circumstances, the present inventors found that
The invention has been completed.

That is, the above object of the present invention is to provide a cylindrical trunk;
A lid part is provided at the top of the cylindrical part and has a sealable material input port, an inert gas inlet port, and a gas discharge port, and a material discharge port is provided at the bottom part of the cylindrical part. In an apparatus for conveying and supplying easily oxidizable powder and granular material, the container includes a conical discharge section having an outlet, and a valve means for opening and closing the conical discharge section. a fixed vertical valve stem; a lower part of the vertical valve stem is slidably held on the valve stem along the valve stem axis; a tip thereof corresponds to the opening of the conical discharge portion; It is composed of an air cylinder biased in the closing direction of the conical discharge part, and a telescopic covering member connected to the rear end of the air cylinder and provided so as to cover the entire vertical valve stem. Transport and supply of easily oxidizable powder or granular material, characterized in that the air cylinder is operated from outside the container by supplying gas to the air cylinder through a gas passage provided in the valve stem. This is accomplished by a device.

The present invention will now be described with reference to embodiments of the invention as illustrated in the accompanying drawings.

FIG. 1 is a sectional view showing one embodiment of the present invention, and the main body of the device includes a cylindrical body 1, a lid 2 provided on the upper part of the body, and a lower part of the body 1. It consists of a conical discharge part 3 provided at the bottom of the discharge part 3, the lower part of which forms a material discharge opening. As shown in Fig. 2, the lid part 2 is provided with a material input port 4, an inert gas inlet 5 equipped with a valve for nitrogen, etc., and a gas discharge port 6 equipped with a valve.These openings are not used. It is sealed after the time and materials are added. Note that a viewing window 7 can be provided in the lid portion 2 in order to see the state of the contents.

The valve body 12 is for opening and closing the material outlet formed at the lower part of the conical discharge part 3. Note that it is preferable to use a material such as Teflon for the contact portion between the valve body and the valve seat of the discharge port. Also, valve body 1
Cover 1 to ensure closure when closing 2.
4 is preferably fixed to the valve body from the outside with bolts or the like.

The valve stem 8 is provided vertically at the center of the main body and is fixed to the center of the lid 2. An air cylinder 18 is provided at the bottom of the valve stem 8, and the tip of the air cylinder 18 is connected to the valve body 12. In order to move the air cylinder 18 up and down, gas passages 19 and 20 are provided in the valve stem 8 so that air can be pressurized from the upper part of the valve stem 8 using an external compressor, gas cylinder, or the like. The air cylinder 18 is adapted to slide on the outer periphery of the valve stem 8, and also prevents the material stored in the container from touching the valve stem 8, improves sealing performance, and further improves sliding performance. In order to ensure a long-term guarantee, a retractable covering member 21 is connected to the rear end of the air cylinder so as to cover the entire outer circumference of the valve stem.

In FIG. 1, the left half of the lower portion of the valve stem shows a state in which the valve body 12 is closed, and the right half shows a state in which the valve body 12 is open. The valve body 12 is pressed toward the material discharge port by the action of a spring 22 provided inside the lower part of the valve stem, and is maintained in a closed state. In this state, the easily oxidizable powder and granules are put in, the container is sealed, and then transported to the supply site and installed above the supplied part, and when air is pressurized from the air passage 19, the air cylinder 18 is moved downward from the valve stem. as shown in the right half of , the valve body 12 is thus opened and material is dispensed. When the supply of material is finished, air is forced in from the air passage 20, the air cylinder is moved downward, and the valve body is closed.

It is preferable that the upper end of the valve stem 8 is provided with a connecting portion to an external operating mechanism, and that the connecting portion is covered with a cover 16 to ensure airtightness.

In addition, a flange 17 is provided at an appropriate position on the outer circumference of the cylindrical body 1, and the flange allows the main body to be placed on a suitable support stand during material input, transportation, and material supply. . As for the position of the flange 17, as shown in FIG. Therefore, it is preferable to connect them integrally from the viewpoint of manufacturing the container.

It is preferable to use an oxidation-resistant material such as stainless steel for the exterior of the device, particularly for the parts that come into contact with the material contained in the container.

The use of the apparatus in this embodiment will be explained in more detail.

First, an inert gas such as nitrogen is introduced into the container from the gas inlet 5 to create an inert gas atmosphere inside the container. In this case, the internal air is purged from the gas outlet 6. Next, the gas inlet 5 and the outlet 6 are closed, and the material input port 4 is opened to charge easily oxidizable powder such as ferromagnetic alloy particles into the container. Since the interior of the container is an inert gas atmosphere, no oxidation reaction occurs and the material is safely contained. A part of the inert gas is discharged from the material input port as the material is input. When the charging is completed, the charging port 4 is closed, the gas exhaust port 6 is closed, and an inert gas is injected through the gas inlet 5 to pressurize the container, and the container is placed on a suitable transport device and transported to the supply site.

At the supply site, the main body of the container is installed directly on the top of the kneading machine, reaction device, storage tank, etc., and air is pumped through the air passage 19 of the joint at the upper end of the valve stem 8, excluding the top cover 16. Make it so that it can be press-fitted. Then, the lower cover 14 is removed, the material discharge port is connected to the supply port (not shown) of the kneading machine, etc., and the air passage 19 as described above is connected.
(Gas passage) Air cylinder 1
8 upward to open the material discharge port and supply the material. In this case, if the department to be supplied, that is, the kneading machine, etc., is also filled with inert gas in advance, the easily oxidizable powder in the container and the inert gas in the kneading machine can be exchanged when the material is supplied. There is no risk of oxidation and the material can be supplied more safely.

Although the present invention has been described above with respect to one embodiment, the present invention is not limited to this only, and various modifications such as the operating mechanism are possible within the scope of the claims.

Since the apparatus of the present invention is constructed as described above, when transporting and supplying easily oxidizable powder such as ferromagnetic alloy powder, there is no need for conventional troublesome means to avoid oxidation due to air. Moreover, it can be safely transported and supplied in large quantities in units of several tens of kilograms.

Further, according to the present invention, the valve means is configured such that the operating portion thereof, which is likely to leak to the outside, is completely covered by the expandable covering member, so that the sealing performance of the container is improved. This improves the effectiveness of preventing inert gas leaks and outside air intrusion, and
The danger of heat generation and ignition due to oxidation of easily oxidizable powder can be reliably avoided for a long period of time.
By increasing the avoidance of heat generation and the risk of ignition in this way, as mentioned above, the amount of easily oxidizable powder that can be replaced at one time increases, which has an immeasurable effect on improving work efficiency. It is something.

Furthermore, according to the structure of the valve body portion of the present invention, the air cylinder itself has a valve function, so the only valve operating means outside the container is a means for supplying air (including gas), and the equipment is It is extremely simple and good, and the operation is easy to adjust. Furthermore, the sliding parts of the air cylinder and vertical rod are completely isolated from easily oxidizable powder and granules, so failure of the sliding parts can be avoided and the reliability of valve operation can be maintained over a long period of time. You can.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an apparatus for transporting and supplying easily oxidizable powder or granular material according to the present invention, and FIG. 2 is a top view of the apparatus shown in FIG. 1. (Symbols in the figure), 1... cylindrical body, 2... lid, 3...
Conical discharge part, 4...Material input port, 5...Inert gas inlet, 6...Gas discharge port, 8...Vertical valve stem, 12...
Valve body, 17...flange, 18...air cylinder, 19, 20...gas passage (air passage), 21...
Covering member, 22...spring.

Claims (1)

[Claims] 1 a cylindrical body, provided on the upper part of the cylindrical body,
Consists of a lid part each having a sealable material input port, an inert gas inlet port, and a gas discharge port, and a conical discharge part having a material discharge port in the lower part provided at the bottom of the cylindrical body. In an apparatus for conveying and supplying easily oxidizable powder and granular material, the container is provided with a valve means for opening and closing the conical discharge section, and the valve means includes a vertical valve stem fixed along the axis of the container, and a vertical valve stem fixed along the axis of the container. The lower part of the valve stem is slidably held on the valve stem along the valve stem axis, and the tip thereof corresponds to the opening of the conical discharge part and is biased in the closing direction of the conical discharge part. and a retractable covering member connected to the rear end of the air cylinder and provided to cover the entire vertical valve stem,
The easily oxidizable powder or granular material is characterized in that the air cylinder is operated from outside the container by supplying gas to the air cylinder through a gas passage provided in the vertical valve stem. Conveyance supply device.