JPH0117969B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage container for powder and granular material, and particularly to a storage container for powder and granular material that is a rectangular storage container and in which the storage container is loaded or unloaded evenly. be.

Conventionally, storage containers for powder and granular materials have been extremely common to have upright cylindrical side walls, roofs, and bottoms, and storage containers with square side walls have rarely been used. .

This is because when stacking stored items in a container or taking out stored items, these operations are not carried out on average, and uneven loads are applied to the side walls. It is used because it is strong against.

However, cylindrical storage containers have poor volumetric efficiency relative to their installation area, and especially when a large number of storage containers are installed side by side, wasted space is created around the storage containers. Constructing these large-capacity cylindrical storage containers on a limited amount of national land poses a problem in terms of effective use of the national land. In addition, some stored items stored in storage containers can solidify over time due to absorption of moisture in the air, etc., and it is important to ensure that stored items in such conditions are removed reliably and safely. This was an extremely difficult problem to solve.

This invention was made in view of the above-mentioned problems, and its purpose is to make it possible to stack or unload stored items in an even manner, to improve the volumetric efficiency of the installation area, and to enable storage over a wide range of areas. To provide a powder storage container capable of reliably and safely discharging objects.

To achieve this objective, the present invention provides a storage container with rectangular side walls, and a conveyor system having two screw conveyors with parallel axes placed above the storage and placed on one of the opposing side walls. A discharge wall is disposed horizontally and vertically movably along the conveyor device, and is perpendicular to the conveyor device and extends along the other side wall. The apparatus is characterized in that it comprises a slit and a downward protrusion protruding from each opening end of the slit, and is configured to move and drive the conveyor device to evenly stack or discharge stored items. It is.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show an embodiment of the powder storage container of the present invention.

First, the powder storage container shown in the same figure consists of a side wall 10 constructed by pouring concrete or the like, a roof section 12 formed on top of the side wall 10, and a bottom section 14. The side wall 10 stands upright on the bottom section 14. It is formed by

The roof section 12 is provided with a carry-in belt conveyor 16, a carry-in tripper 18, a carry-in screw conveyor 20, and a carry-in chute 22, which penetrate through the side wall 10 and protrude a portion outside the storage container. The loading chute 22 is vertically expandable and retractable so that stored items can be loaded into the container and lifted vertically. There is.

On the other hand, the bottom portion 14 is provided with a delivery chute 24 for carrying out stored items and a delivery belt conveyor 26 installed below this chute 24.

The powder storage container shown in the figure has the following features compared to the conventional container described above.

That is, the side wall 10 is formed in the shape of a rectangular parallelepiped with one side slightly longer than the other, and the wall thickness becomes slightly thicker toward the bottom 14.

In addition, the conveyor device for stacking and discharging stored items carried in from the carry-in chute 22 has an elongated spindle serving as an axis and a continuous line wound around the spindle in a direction perpendicular to the slightly elongated side wall 10. Two screw conveyors 28 and 30, which have spiral blades extending in a straight line and are rotatable left and right, are arranged with their axes parallel to each other and at a predetermined interval so that the spiral blades do not intersect with each other. The spiral blades of the Yukon Bears 28, 30 have pitches in opposite directions.

Furthermore, this screw conveyor 28, 30
is suspended by a hanging device 32 from a gutter 34 provided at the upper end of the side wall 10,
The lifting device 32 can be moved vertically by vertical movement, and wheels 35 are provided on the lower surfaces of the left and right side ends of the garter 34, and the side walls 1 that also face each other in the horizontal direction
It is possible to move along one side of 0. Furthermore, a narrow horizontal slit is provided on the screw conveyor 28, 30 side, which is perpendicular to the axes of the screw conveyors 28, 30 and extends along the other side of the side wall 10 over the entire length of the side wall 10. 36
The slit 36 has a protrusion 38 extending downward on the entrance side thereof, and a discharge wall 40 is formed by slightly narrowing the entrance side of the slit 36, and the lower end of the discharge wall 40 is connected to the It opens above the dispensing chute 24.

Now, in the powder storage container as described above,
When stacking stored items in a container, the stored items transported by the carry-in belt conveyor 16 are carried into the container through the carry-in tripper 18, the carry-in screw conveyor 20, and the carry-in chute 22, and are carried into the container by the carry-in belt conveyor 16. This is done by rotationally driving 28 and 30 while moving them in the horizontal direction using a gutter 34.

In this case, the screw conveyor 2
8 and 30 are the garter 34 as shown in FIG. 3a.
(screw conveyor 28 in the figure) in the horizontal movement direction A of the arrow I.
By rotating the stored items in the direction, the stored items flow from the carry-in tripper 18 toward the side wall 10 and are stacked in a uniform state, and after one level is stacked on average in the container, the hoisting device 32 Then, the screw conveyors 28, 30 are raised to a predetermined height, and the above-described operations are repeated to perform sequential stacking.

In addition, during the above-mentioned stowing, the carrying-in chute 22 also rises upward one by one as the stored items are stowed.

When the gutter 34 moves in the opposite direction, the screw conveyor 30 is rotated in the direction of the arrow, and the screw conveyor 28 is stopped.

When the stowage of stored items is completed, the slit 36 of the discharge wall 40 is also slightly narrowed by the protrusion 38 on the entrance side as described above, so that the stored items are placed on the slit 36 in a predetermined position. It comes to rest at an incline. (See FIG. 2b) Since this inclination differs depending on the stored item, the amount of protrusion of the protrusion 38 is set appropriately.

On the other hand, when discharging stored goods,
As shown in FIG. 3b, the screw conveyor 2
8, 30 in the directions of arrows and , and move the gutter 34 in the direction of arrow A, so that the flow of the stored material is directed from the side wall 10 to the discharge wall 40, contrary to the stowage described above, An average amount of payout is made.

In this case, the entrance side of the slit 36 is slightly narrowed by a protrusion 38, and the stored items discharged by the screw conveyors 28, 30 as described above pass through the protrusion 38 and enter the slit 36. The particles or powder are pushed out to the expanded portion, creating a slight margin between the particles, and due to this bridging phenomenon of the stored material to be discharged, the stored material is smoothly discharged without clogging the slit 36. The chute 24 and the carry-out belt conveyor 26 also carry the container out of the container.

When one level of dispensing is completed, the gutter 34 is lowered by a predetermined amount and the same dispensing operation is continued, thereby completely discharging the stored items in the container.

As described above, according to the present invention, since the side wall 10 is rectangular, the volumetric efficiency of the installation area is effectively utilized compared to the conventional cylindrical shape, and when a large number of devolatilization containers are installed in parallel. In addition, the side walls 10 can be placed very close to each other, or in some cases, the side walls 10 of adjacent storage containers can be shared, making it possible to further improve the volumetric efficiency.

In addition, the above-mentioned discharge wall 40 does not interfere with the operations when loading and discharging stored items, and serves as a retaining wall to reinforce the side wall 10 during storage, and as a dispensing opening during dispensing. It is something that has a function.

Furthermore, since the stored items are loaded and unloaded in an even manner as described above, no unbalanced load is applied to the side wall 10, and the discharge wall 40
In addition, even if the side wall 10 is rectangular, its function as a storage container is not a problem.

Furthermore, as described above, the two screw conveyors 28 and 30 are used to unload the stored items while digging up the stored items, so even if the stored items solidify over time, they can be removed without any problem. There are no restrictions on what can be stored, and a wide range of powder and granular materials can be stored.

[Brief explanation of drawings]

1 to 3 show an embodiment of the powder storage container of the present invention, in which FIG. 1 is a plan view, FIG. 2a is a vertical sectional view, and FIG. 2b is a discharge wall. FIG. 3a is a partially enlarged sectional view showing the operation of the screw conveyor during stacking, and FIG. 3b is a view showing the operation of the screw conveyor during discharging. 10... side wall, 12... roof, 14... bottom, 16... carry-in belt conveyor, 20... carry-in screw conveyor, 24... discharge chute,
28, 30...Screw conveyor, 34...Gutter, 36...Slit, 40...Discharge wall.

Claims (1)

[Claims] 1 Consisting of an upright side wall, a roof, and a bottom, the roof has an opening for carrying in stored goods and the bottom has an opening for carrying out, and is equipped with a conveyor device for loading and unloading stored goods. In the container, the side wall is rectangular, and the conveyor device has two rotatable screw conveyors arranged above the stored items so that their axes are parallel to each other at a predetermined distance, and the conveyor device has two screw conveyors facing each other. forming a discharge wall that is disposed horizontally and vertically movably along one of the side walls of the conveyor device, extends perpendicularly to the longitudinal direction of the conveyor device, extends along the other side wall, and is open to the conveyor device side; This discharge wall is equipped with narrow horizontal slits arranged in multiple stages and downward protrusions respectively protruding from the open ends of the slits, and is used for stacking or discharging stored items in the container. 1. A powder and granular material storage container, characterized in that said conveyor device is moved and driven to stack or discharge stored materials evenly.