JPH026703B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage container for powder and granular materials, and particularly to an improvement in the dispensing port of the storage container.

BACKGROUND ART Various types of storage containers such as silos for storing grains, chips, coal, etc. have been conventionally provided, and for example, there is a silo for storing bulky items disclosed in Japanese Patent Publication No. 10471/1983.

As shown in FIG. 1, the dispensing port structure of this silo consists of vertical rods and annular horizontal members 10, 10' arranged in multiple stages at predetermined intervals around the central axis of the silo. An annular dispensing port is provided.

When the stored material 12 is stored in the silo, the horizontal member 12 is placed at the dispensing port at a specific angle of repose (θ) determined by the size, density, etc. of the stored material 12.
At the time of dispensing, a screw conveyor or the like is used to press the stored article 12 toward the dispensing opening, passing it through the space between the horizontal members 10 from the bottom, and dropping it downward inside the dispensing opening. It is now possible to pay out by letting it.

However, such a dispensing structure has the following drawbacks.

That is, when the stored material 12 is pressed toward the dispensing port side using a screw conveyor or the like as described above,
In the lower part between the horizontal members 10, the stored material 12 temporarily rises beyond the angle of repose (θ) and comes into contact with the lower surface of the upper horizontal member 10. For this reason, the horizontal member 1 in which stored items 12 are arranged in multiple stages
There was a drawback in that frictional resistance increased when each contacting and pressing the lower surface of 0.

A device that eliminates these drawbacks is also provided, for example, in Japanese Patent Application No. 57-36326.
The basic structure of this invention is substantially the same as that of the invention disclosed in Japanese Patent Publication No. 10471/1983, but as shown in FIG.
In order to eliminate the drawbacks of the No. 10471 publication, a downwardly protruding protrusion 14 is provided at each tip of the horizontal member 10 of the annular dispensing port.

In this case, even if the stored material 12 is pushed toward the dispensing port side by the screw conveyor and the stored material 12 passes through the tip of the protrusion 14 and protrudes slightly upward,
It does not come into contact with the lower surface of the horizontal member 10, which reduces frictional resistance when dispensing stored items 12.

However, the two payout structures mentioned above are
All had common shortcomings.

That is, in the loading state, the stored items 12 are placed on the horizontal member 10 at an angle of repose (θ), but due to the weight of the screw conveyor during the loading operation, etc., the stored items 12 are In addition to the problem of easy spillage from the top of the horizontal member 10, there was also a drawback that the stored items 12 could not be completely dispensed automatically at the time of dispensing.

In other words, in either structure, the storage 12
In each figure, the hatched portion remains in a state that cannot be removed, and in order to remove it, vibration must be applied or it must be removed manually, which is extremely troublesome.

This invention was made in view of the above-mentioned problems, and its purpose is to effectively prevent stored items from falling out during the loading state, and to prevent stored items from falling over the dispensing opening at the time of dispensing. It is an object of the present invention to provide a discharge port structure for a powder storage container that does not leave any residue.

In order to achieve this object, the present invention provides a discharge port structure for a powder storage container, in which a shielding wall member of the stored material discharge port faces outward at an angle of repose of the stored material with respect to the horizontal direction, and faces downwardly. As well as tilting to
The present invention is characterized in that the angle connecting the tip of each shielding wall member and the rear end of another shielding wall member located below it is set to be the same as the angle of repose.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In the following description, parts that are the same as or correspond to those in the conventional example described above are given the same reference numerals.

FIG. 3 and FIG. 4 show an embodiment of a discharge port structure of a powder storage container according to the present invention.

First, to explain the entire storage container shown in FIG. 3, the container is formed into a substantially cylindrical shape with a concrete side wall 20 and a ceiling 22, and the storage container 12 is placed inside the center of the ceiling 22. A loading hopper 24 for storage, and a telescopic loading chute 26 that is vertically extendable and communicated with the loading hopper 24.
The lower end of the carry-in chute 26 rotates around the vertical axis of the storage container, and is suspended by a wire 28 that expands and contracts to move up and down. It is fixed to a screw conveyor device 30 arranged in the direction.

A dispensing port 32 that extends vertically and is hollow inside is provided on the central axis of the storage container, and this dispensing port 32 is connected to a plurality of vertical members 32a.
A large number of ring-shaped shielding members 32b are arranged in a multi-stage manner, and a discharge chute 34 is provided at the lower end of the discharge port 32. Further, a discharge conveyor 36 is disposed below the discharge chute 34. ing.

To stack the stored materials 12 into the powder storage container having such a structure, the stored materials 12 are supplied to the input hopper 24, and then transferred to the telescopic loading chute 2.
6 to the screw conveyor device 30 while the swirler blade 3 of the screw conveyor device 30
8, the stored items 12 are flowed out to the side wall 20 side, and the screw conveyor device 30 is rotated to stack them in an even state.
When stacking to a predetermined height is completed, the screw conveyor device 30 is moved upward so that the stored items 12 are stored at a predetermined height within the storage container.

On the other hand, the screw conveyor device 30
By rotating the swirling blades 38 in the opposite direction to the above-mentioned loading time, a flow is created that directs the stored items 12 toward the dispensing port 32 side, and this is pressed between the shielding members 32b,
It passes through the inside of the payout port 32 and falls into the discharge chute 34, and is also discharged to the outside by the carry-out conveyor 36.

The basic structure of such a powder storage container is almost the same as the conventional container of this kind described above, but the discharge port structure shown in the figure has the following characteristics. .

That is, the ring-shaped shielding member 32b is
As shown in an enlarged view in FIG. 4, the storage material 12 is inclined outward and downward at its angle of repose with respect to the horizontal direction.

Further, between the vertically adjacent shielding wall members 32b, the angle connecting the tip of the upper shielding wall member 32b and the rear end of the lower shielding wall member 32b is also set to be the same as the angle of repose of the stored object 12.

Now, when the shielding wall member 32b is tilted outward and downward as described above, when the stored items 12 are stacked in the storage container by the above-described means,
Since the shielding wall member 32b is inclined upward toward the center, the stored items 12 are
This effectively prevents spills from falling downward from the inner circumference of the screw conveyor 32b, and the angle connecting the top and rear ends of the vertically adjacent shielding wall members 32b is also an angle of repose. When the device 30 is started, discharging starts almost at the same time, and when the conveyor device 30 is stopped, discharging is also stopped, so that the stored material 12 can be cleaned very well during discharging. Note that when the shielding wall member 32b is tilted downward at the angle of repose, the frictional force between the stored items 12 and the upper surface of the shielding wall member 32b becomes larger than when the member 32b is horizontal. is pressed by the screw conveyor device 30, so an increase in frictional force hardly poses a problem.

Furthermore, even if the screw conveyor device 30 presses the stored items 12 between the barrier members 32b during dispensing, the angle of repose (θ) Even if the storage material 12 rises slightly beyond the upper barrier wall member 32a, there is little risk that the stored material 12 will come into contact with the lower surface of the upper shielding wall member 32a and increase frictional resistance.

Furthermore, what should be noted is that the shielding wall member 32
This means that there is no stored material 12 left on b after the discharging of the stored material 12 is completed.

That is, since the shielding wall member 32b is inclined at an angle of repose (θ) with respect to the horizontal direction, the stored items 12 cannot be accumulated on the shielding wall member 32b and fall, so that the stored items 12 are completely It is possible to make a payout possible.

Furthermore, as is clear from FIG. 4, inclining the shielding wall member 32b as described above,
The length of the shielding wall member 32b may be approximately half that of the conventional horizontal member 10, which also has the advantage of reducing material costs.

FIG. 5 shows another embodiment of the present invention, the basic configuration of which is substantially the same as the first embodiment, and only the characteristic points will be explained. A reinforcing member 32c in the shape of a truncated cone is fixedly installed inside each of them, and it is possible to achieve the same effect as the first embodiment, and also to prevent the pushing force acting on the dispensing port 32 when dispensing the stored items 12. It can effectively counter pressure.

In this case, the reinforcing material 32c does not extend to the tip of the shielding wall member 32b, so the conveyor device 3
There is no risk that the stored object 12 pressed to zero will come into contact with the reinforcing material 32c and increase the frictional force.

In the above embodiments, the basic structure of the dispensing port 32 is ring-shaped, but the present invention is not limited to this. For example, the storage container may have a rectangular shape. Needless to say, the present invention can also be applied to a shield-type outlet structure in which the outlet is formed only on one side of the side wall.

As explained in detail in the embodiments above, the present invention provides a dispensing port structure for a powder storage container in which the shielding wall member of the stored material dispensing port is inclined outward at the repose angle of the stored material with respect to the horizontal direction. , and the angle connecting the tip and the rear end of other shielding members located below is also the same as the angle of repose, so it is possible to prevent spills from falling out during the loading state, and to ensure complete removal of stored items. It makes it seem possible.

[Brief explanation of drawings]

FIGS. 1 and 2 are sectional views of the main parts of conventional dispensing port structures. 3 and 4 show one embodiment of the dispensing port structure of the present invention, and FIG. 3 is an overall sectional view of the storage container, and FIG.
The figure is an enlarged sectional view of the main part of FIG. 3. Figure 5 shows
FIG. 7 is a partially cutaway sectional view showing another embodiment of the invention. 10...Horizontal member, 12...Storage, 14...
Projection, 20... Side wall, 22... Ceiling part, 24...
Input hopper, 26...Telescopic carry-in chute, 28...Wiener, 30...Screw conveyor device, 32...Discharge port, 32a...Vertical member, 32b...Blocking member, 32c...Reinforcement material, 3
4... Discharge chute, 36... Unloading conveyor, 3
8...Swivel wing.

Claims (1)

[Claims] 1. It has a conveyor device arranged in the radial direction inside the storage container, and a discharge port in which shielding members provided on the central axis of the container are arranged in multiple stages, and the conveyor device is driven to In a powder storage container configured to press the stored material between the shielding members of the dispensing port so that the stored matter is discharged through the inside of the dispensing port, the shielding wall member is The angle of repose of the stored material is such that it slopes outward and downward, and the angle connecting the tip of each barrier member and the rear end of the other barrier member located below it is set to be the same as the angle of repose. A discharge port structure of a powder storage container characterized by: