JPH0848423A - Stock device for powder and granule - Google Patents

Abstract

PURPOSE:To eliminate a dead around a cavity produced due to erratic falling of a powder and granule caused by moisture contained in the powder and granule deposited on a hopper or by compaction for the powder and granule by a simple means. CONSTITUTION:A soft air bag 7 is installed around a hopper 5, and the air bag 7 is connected to an air compressor. When a dead 16 is produced, the air bag is inflated so as to collapse the dead 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stock apparatus for powder and granular material such as earth and sand, and more particularly to a dead eliminating means.

[0002]

2. Description of the Related Art As a stock device for powder and granular materials such as earth and sand,
2. Description of the Related Art Conventionally, there is known an apparatus in which a hopper is provided on the bottom of a stockyard and a conveyor such as a belt conveyor is provided below the gate of the hopper. In addition, a hopper is provided in the lower part of the required container, a conveyor device such as a belt conveyor is provided below the gate of the hopper, or a stock yard is provided instead of the conveyor device in which a truck yard is provided below the gate for trucks to move in and out. Is also known.

[0003]

In these stock devices, when the deposit of powder or granular material such as earth and sand is moist, or when the powder such as cement is compacted, the gate of the hopper is When opened, the powder and granules above the gate (including fine powder; the same applies below) do not fall, but the powder and granules around it do not fall, and the vertical cavity is approximately the size of the gate in the center. May occur and the falling of the powder or granules may stop.

Even if the granular material accumulated in the stock yard falls most smoothly, it is inevitable that dead stock will occur around the hopper, and the dead stock can be pushed into the hopper with a bulldozer or the like. It is taken.

However, if the powder or granules do not drop smoothly, the cavities described above occur, and dead occurs between the cavities and the dead stock, which significantly impedes the carrying-out efficiency.

In order to eliminate such a dead, it is conceivable to attach an electrically driven vibrator to the hopper and apply vibration to the hopper. However, since a large pressure is applied to the upper part of the hopper by deposits, It is difficult to generate a large vibration, and thus it is not an effective dead elimination means.

Therefore, an object of the invention as set forth in claim 1 of this application is to enable dead stocks to be effectively eliminated in the stock device provided in the stockyard as described above.

Also, in the stocking device having the hopper provided at the lower part of the container, the above-mentioned cavity occurs, and a dead occurs between the cavity and the inner surface of the vessel. The invention according to claim 2 of this application aims to effectively eliminate dead in such a stock device.

[0009]

According to a first aspect of the present invention, a hopper is provided on the bottom surface of the stock yard of the powder and granular material, and a transporting device is provided below the gate of the hopper to stock the powder and granular material. In the above, a flexible air bag is attached around the hopper, and the air bag is connected to a source of compressed gas.

[0010] According to a second aspect of the present invention, in a stock apparatus for powder and granules, wherein a hopper is provided at a lower portion of a container and a gate is provided at a lower end of the hopper, a flexible air bag is provided on an inner wall surface of the hopper. Is attached, and a compressed gas supply device is connected to the air bag.

[0011]

In each of the above inventions, when the powder and granules are smoothly supplied, the air bag is kept flat without supplying the compressed gas. When the deposit becomes dead, a compressed gas is supplied to the air bag to inflate it and the dead powder and granules are collapsed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first embodiment shown in FIGS. 1 to 3 is an embodiment of the invention described in claim 1. That is, as shown in FIG.
A transfer tunnel 2 is provided on the ground of the stockyard 1, and a belt conveyor 3 is installed inside the transfer tunnel 2. The ceiling portion of the transfer tunnel 2 is exposed on the ground, a substrate 4 is placed in the same area as the ceiling portion of the stockyard 1, and a hopper 5 is attached to a hole provided in the ceiling portion.

A gate 6 is provided at the lower end of the hopper 5,
The lower part of the gate 6 faces the belt conveyor 3.

A ring-shaped air bag 7 is installed on the outer periphery of the upper end of the hopper 5 (see FIG. 2), and the ground surface thereof is adhered. An air supply pipe 8 is connected to a part of the air bag 7, and an air discharge pipe 9 is connected to the opposite side of the connecting part. The air supply pipe 8 is connected to an air compressor via a valve 11. Further, the air discharge pipe 9 is connected to the inclined surface of the hopper 5 via the valve 12 and opened to the inner surface thereof.

The air bag 7 is composed of a rubber tube or the like having airtightness and durability. When air is not supplied to the air bag 7, the air bag 7 is flatly contracted as shown in FIG. When supplied, it expands into a semicircular cross section as shown in FIG.

The above-mentioned air bag 7 is not limited to the ring-shaped one as shown in the drawing, but several air bags are arranged around the hopper 5, and the air bags are connected to each other. Good.

The first embodiment is as described above, and the powder particles 13 such as earth and sand are piled up in the stock yard 1 centered on the substrate 4. When carrying out the powder or granular material 13, the belt conveyor 3 is driven and the gate 6 is opened. The granular material 3 normally falls naturally into the hopper 5 while naturally collapsing to the position shown by the alternate long and short dash line. The dead stock 14 on the outside of the one-dot chain line is pushed into the hopper 5 side with a bulldozer or the like.

However, when the powder or granules 13 are difficult to be naturally collapsed due to the presence of moisture, only the central portion of the deposit of the powder or granules 13 falls to form the cavity 15 and the cavity 15
A dead 16 occurs around.

Therefore, when the valve 11 is operated to supply compressed air to the air bag 7, the air bag 7 inflates as shown in FIG. 3 and gives a movement to the earth and sand around the cavity 15. Then, the movement induces the collapse of the earth and sand of the dead 16, and the dead 16 can be dropped into the hopper 5.

After the dead is eliminated, the air exhaust pipe 9
When the air in the air bag 7 is discharged by operating the valve 12 of, the air is discharged toward the inside of the hopper 5, so that the powder or granular material 13 staying inside the hopper 5 is dropped downward. be able to.

Next, the second embodiment shown in FIGS. 4 and 5 will be described. This embodiment is an embodiment of the invention described in claim 2. FIG. 4 shows the case of using the rectangular hopper 18,
FIG. 5 shows a case where the round hopper 18 is used.

In this case, it is a silo type in which a hopper 18 is integrally provided at the lower part of a required container 17, and a gate 19 is provided at the lower end thereof. The belt conveyor may be installed below the gate 19 as described above, or a track yard may be installed to directly describe the track on a track or the like.

The air bag 2 is provided on the inner surface of the hopper 18.
0 is fixed, and the air supply pipe 21 and the air discharge pipe 22 are connected to it.

Also in this case, when dead 16 occurs in the container 17 as shown in the figure, compressed air is supplied to the air bag 20 to inflate it and the powder particles 13 of the dead 16 are collapsed.

[0025]

As described above, according to the first and second aspects of the present invention, compressed air having a sufficiently large pressure is supplied to the air bag to overcome the weight of the deposit of the granular material,
A sufficiently large vibration can be given. Therefore, there is an effect that the dead can be reliably eliminated with a simple device.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment before dead elimination.

FIG. 2 is a cross-sectional plan view of the above hopper portion.

FIG. 3 is a cross-sectional view after elimination of the dead in the same as above.

FIG. 4A is a cross-sectional view of a rectangular hopper according to a second embodiment. FIG. 4B is a transverse plan view of the same.

FIG. 5 (a) is a cross-sectional view of a round hopper according to a second embodiment. (B) is a transverse plan view of the same.

[Explanation of symbols]

 1 Stock Card 2 Transport Tunnel 3 Belt Conveyor 4 Substrate 5 Hopper 6 Gate 7 Air Bag 8 Air Supply Pipe 9 Air Discharge Pipe 11 Valve 12 Valve 13 Powder Granule 14 Dead Stock 15 Cavity 16 Dead 17 Container 18 Hopper 19 Gate 20 Air Bag 21 Air supply pipe 22 Air discharge pipe

Claims (2)

[Claims] 1. A stock apparatus for powder and granules, comprising a hopper provided on the bottom of a stock yard for powder and granules, and a conveying device provided below the gate of the hopper, wherein a flexible air bag is attached around the hopper. And a stock device for powder or granular material, wherein the air bag is connected to a source of compressed gas. 2. A powder stock apparatus comprising a hopper provided at a lower portion of a container and a gate provided at a lower end of the hopper. A stock device for powder and granules, characterized in that it is connected to the feeding device of.