JPS63242826A - Silo - Google Patents

Abstract

PURPOSE:To reduce the weight and drive capacity of a screw conveyor by forming the diameter on the disc column side of the screw conveyor larger than the diameter on a side wall side. CONSTITUTION:A screw conveyor 4 having different dimension of the screw blades on a side wall 1 side and a disc column 2 side is used so that the dimension of the screw blade of the screw conveyor becomes the dimension suitable for the transport quantity of the blade in each part of the screw. Since the dimension of the screw blade is the dimension suitable for the transport quantity in each part, useless part can be removed, and the weight of the screw can be reduced in comparison with the screw having an equal dimension over the whole length of the screw, and the weight and drive capacity of the constitution part can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a silo for storing powder and granular materials, and particularly to a screw conveyor.

[Conventional technology]

As a silo for storing powder and granular materials, JP-A-58-1702
Those disclosed in Publication No. 1 and the like are publicly known. As shown in FIG. 7, this type of silo is equipped with a container having an upright cylindrical side wall 1, and a disk column 2 for carrying out is erected at the center of the container. The lower end of the disk column 2 serves as an outlet 3. A screw conveyor device 4 is horizontally suspended between the disk column 2 and the side wall 1 from above the container 1, and is capable of vertical movement and horizontal rotation.

The granular material is supplied from above the container 1 to the screw conveyor device 4 through the conveyor 5, the inlet 6, the screw conveyor 7, and the chute 8, and is moved to the outside by the screw conveyor 4. Screw conveyor 7, chute 8,
The screw conveyor device 4 rotates horizontally as a unit. 9 is a member that suspends the screw conveyor device 4 with lobes 10 and rotates the upper end of the side wall 1;
゜ is operated to move the screw conveyor device 4 up and down.

When carrying out the powder in the container, the screw conveyor device 4 is reversed and sent from the outer circumferential side to the disk column 2 side, and is transferred from the inside of the disk column 2, to the outlet 3, to the screw conveyor 11. It is carried out through a conveyor 12. 13 is the upper surface of the powder material.

[Problem that the invention seeks to solve]

The diameter of the screw conveyor is the same over its entire length. When the planting capacity is smaller than the dispensing capacity, the diameter of the screw conveyor is determined by the dispensing capacity.

In conventional technology 4t'r, at the time of discharging, the amount of powder and granules transported by the screw blades increases as the powder and granules are transported from behind to the powder and granules excavated by the screw blades as the powder and granules advance in the dispensing direction. Despite the fact that the number of bodies increases with the addition of new bodies, no consideration is given to this point.

Since the diameter of the blades is the same over the entire length of the screw, the diameter of the screw blades on the wall side of the storage container is greater than the diameter required for the transport capacity.

For this reason, the weight of the screw increases due to unnecessary blades,
There have been problems in that the capacity and weight of the drive device for rotating unnecessary weight parts has increased, and the weight of the frame that supports the screw and the drive device has also increased.

An object of the present invention is to provide an economical screw conveyor by reducing the weight and driving capacity of the screw conveyor.

[Means for solving problems]

The above purpose is to set the diameter of the screw blades of the screw conveyor at each point in the transport direction of the screw conveyor.
This is achieved by setting a value appropriate to the amount of transport at that point.

[For production]

Since the diameter of each point in the transport direction of the screw conveyor has a value suitable for the amount of transport at that point, it is possible to reduce the weight of the screw conveyor.

〔Example〕

The present invention will be explained below with reference to FIG. The screw conveyor 4 is designed such that the size and radial height of the screw blades of the screw conveyor are changed on the side wall 1 side and the disk column 2 side so that the size is suitable for the transport amount of the blades of each part of the screw. That is, the diameter D2 on the side wall 1 side
is smaller in diameter than the disk column 2 side.

According to this embodiment, the size of the screw blades is suitable for the transportation amount of each part, so there is no waste, and the weight can be reduced compared to a screw with the same diameter over the entire length of the screw. This has the effect of reducing the weight and driving capacity of the vehicle, and also provides an economical storage facility.

〔Effect of the invention〕

According to the present invention, since the weight of the screw conveyor can be reduced, not only the driving capacity can be reduced, but also the weight of other storage container components can be reduced, and an economical storage facility can be provided.

[Brief explanation of the drawing]

FIG. 1 is a front view of a screw conveyor according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a silo to which the present invention is applied.

Claims (1)

[Claims] 1. A silo for storing powder and granular material consisting of a container having an upright cylindrical side wall, a roof, and a bottom, with a disc column for transporting powder and granular material erected in the center of the container, and the lower end of the silo for storing powder and granular material. In the silo, the silo has a screw conveyor which has a loading port at the top, a screw conveyor which is disposed between a disk column and a side wall with the feed direction directed horizontally, and which is capable of horizontal rotation and vertical movement. A silo characterized in that the diameter of the conveyor on the disk column side is larger than the diameter on the side wall side.