JPH0378337B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is installed inside a large powder storage container (silo) that stores a large amount of grain, ore, etc. The present invention relates to a scraping device that moves the powder from the center to the outer circumference, and conversely moves the powder from the outer circumference to the center during discharging.

《Prior art》 Typical conventional scraping devices include:
As shown in JP-A-59-186836, the dispensing screw part or the dispensing rake part is suspended from a girder rotating on the ceiling surface, or JP-A-57-1868
As shown in Japanese Patent No. 62122, a device in which the outer end of a beam constituting a scraping device is supported by the inner wall of a silo is known.

《Problems to be solved by the invention》 However, the former scraping device has a diameter of
If applied to large silos ranging from 80m to 150m, it would require a very large girder, making it uneconomical.

On the other hand, not only is it necessary to specially reinforce the inner wall of the silo that supports the beam of the latter raking device, but also because the horizontal position of the outer edge of the raking device is constant, the stored material in the silo increases or decreases to its level. When the level changes, it is necessary to install special equipment such as a trolley bucket with a harrow to carry out raking corresponding to this level.

The present invention was made in view of the above-mentioned problems, and its purpose is to easily adjust the storage level of powder and granules in the silo without requiring large-scale equipment or special reinforcement of the silo wall. To provide a scraping device for a large silo that can be raised and lowered.

<<Means for Solving the Problems>> In order to achieve the above object, the present invention provides a loading/unloading column having vertical and horizontal openings in the center of a large powder storage container, A raking device is installed inside the storage container and extends from the loading/unloading column to the vicinity of the inner wall of the storage container. The granules are supported by a cart consisting of a rotating driving device with a cover that runs on the surface of the powder along the outer periphery of the storage container.

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

In FIG. 1, reference numeral 1 denotes a cylindrical flat-bottomed silo container, in the center of which a column 2 for transporting powder and granular material, which will be described in detail later, is disposed. A cone 3 is disposed inside the lower end of the carry-in/out column 2, and an annular outlet 4 is defined between the cone 3 and the lower end opening of the carry-in/out column 2. A rotary scraping blade 5 is provided below the dispensing port 4, and the powder scraped by the scraping blade 5 falls into the dispensing bit 6 below and is extended to the dispensing bit 6. It is placed on a delivery conveyor 7 and transported outside through a delivery tunnel 8.

As shown in FIG. 2, the carry-in/out column 2 has eight vertical column members 9 disposed in a ring shape at regular intervals to form a collective column, and each column member 9 has a cross section. The longitudinal centerline in the figure extends in the radial direction, and its outer edge is tapered.

Therefore, a vertical loading/unloading path 10 defined by the inner ends of the eight pillar members 9 is formed at the center of the loading/unloading column 2, and a vertical loading/unloading path 10 defined by the inner ends of the eight pillar members 9 is formed at the center of the loading/unloading column 2. Eight vertically continuous radial loading/unloading passages 11 are formed between them.

A self-propelled rotating stacker/reclaimer 12 as a scraping device is provided around the outer periphery of the carry-in/out column 2 and rotates around the column. In the present invention, the inner end of the stacker reclaimer 12 is supported so as to be able to move up and down along the carry-in/out column 2, and the outer end is equipped with a rotating drive with a cover that allows it to run on the surface of the powder and granular materials stored. It was supported by device 13.

First, the support structure of the inner end of the stacker reclaimer 12 will be explained. This stacker reclaimer 12 includes a rake type chain conveyor 14.
The inner end of the rake type chain conveyor 14 is connected via a lever 15 and a pin 16 to an outer frame 18 of a swing ring 17 arranged around the outer circumference of the carry-in/out column 2. 18 is connected to the inner frame 19 so as to move up and down integrally with the inner frame 19 as described later. The inner frame 19 of this turning ring 17 is connected via a cable 22 to a winch 21 of a base plate 20 provided at the upper end of the loading/unloading column 2.
1, the revolving ring 19 is moved up and down, and the rake type chain conveyor 14 is also moved up and down accordingly.
Further, the lower end of a telescopic chute 23 is connected to the inner frame 19 of the swivel ring 17, and the upper end thereof is fixed to the base plate 20. Therefore, when the inner frame 19 moves up and down by operating the winch 21, the telescopic chute 23 moves up and down. It will expand and contract. Although this telescopic chute 23 is effective in preventing dust from scattering, it is not necessary when the loading head is small and there is no dust.

The positional relationship between the loading/unloading column 2 and the swivel ring 17 is as shown in FIG.
Reference numeral 9 denotes an outer ring portion 19a surrounding the collecting column, an inner ring portion 19b located inside the collecting column, and a column member 9.
By extending the space between the outer ring part 19a and the inner ring part 1
It consists of a plurality of arms 19c connecting the arms 9b. A guide roller 24 is attached to a pair of brackets projecting from inside at predetermined intervals from the inner circumferential surface of the outer ring portion 19a, and the guide roller 24 is attached to the outer edge tapered surface of the column member 9. It abuts from both sides to guide the vertical movement of the inner frame 9 up and down along the collecting columns. and,
Rollers 25a and 25b are respectively arranged at a predetermined interval on the outer ring portion 19a and on the side thereof.
The inward flange 18a formed on the upper part of the outer frame 18 and the inner circumferential surface of the outer frame 18 are supported by these, and thereby the outer frame 18 is rotatable with respect to the inner frame 19.

Next, the support structure of the outer end of the raking device will be explained with reference to FIGS. 5 and 6.
These figures show the mounting structure of the rake type chain conveyor 14 and the above-mentioned swing drive device 13 with a cover. The rake type chain conveyor 14 is provided with a rake frame 26 that supports it, and this rake frame 26 is connected to the swing drive device 13.
trapezoidal frame 27 and a plurality of telescoping cylinders 2
By extending and contracting this cylinder 28, the height of the rake frame 26 is adjusted so that the rake frame is horizontal or at an allowable inclination angle. That is, although it is necessary to change the height of the rake frame between loading and unloading due to the loading and unloading mechanism, this adjustment can be performed reliably and easily by the telescoping cylinder 28. More specifically, in the illustrated embodiment, the lower end position of the trapezoidal frame 27 of the swing drive device 13 is changed in the forward and backward directions of movement, so that the level of the cover bands 29a, 29b corresponds to the payout layer thickness or the stacked layer thickness. The difference is made by the amount of difference. At the time of dispensing, as shown in FIG.
The upper covering belt 2 should be approximately flush with the lower surface of the
9b side is the turning direction shown by the arrow. On the other hand, at the time of loading, as shown in FIG. 6, the cylinder 28 is contracted so that the lower end of the rake blade 30
Lower covering belt 2 so that it is almost the same as the lower surface of
9a side is the turning direction shown by the arrow.

In addition, as a method of changing the height of the rake blade 30 other than the above example, the rake frame 26 and the frame 27 of the swing drive device 13 are fixed, and the cover belt 29 is fixed.
The heights of a and 29b themselves may be changed.

Next, referring to FIG. 7, the loading operation in the above-mentioned silo will be described.
It is dropped from above the telescopic chute 23 at the center of the silo, passes through the telescopic chute 23, falls to the lower part of the rotating ring 17, and is supplied to the rake section of the self-propelled rotating stacker reclaimer 12.
The stored items are sequentially conveyed and stacked by the rake blades 30 from the center toward the outer wall of the silo.

When the stored materials reach the outer wall of the silo, the self-propelled rotating reclaimer 12 is rotated at a certain angle as shown in FIG. 6, and the stored materials are transported and stowed from the center of the silo toward the outer wall. This operation is repeated, and when the entire surface of the silo is completely stowed, the hoisting winch 21 lifts the silo to a certain height and stows the next layer, which is then repeated to keep the surface of the stored items flat while stacking them one after another.

After storing the powder and granular material as described above,
When the scraping blade 5 at the lower end of the loading/unloading column 2 located at the center of the silo is operated to remove this, the stored material directly above it is discharged, leaving the inside of the loading/unloading column 2 as shown in Figure 8. Crater C (hollow)
occurs.

The self-propelled rotating stacker reclaimer detects this crater C, drives the rake in the opposite direction to the loading direction (from the outer wall of the silo to the center), and moves the stored material into the rake as shown in Figure 5. excavation and supply;
The stored materials are carried out of the silo by a delivery conveyor 7.
When the unloading for one layer is completed over the entire surface of the silo, the hoisting winch 21 is suspended for one layer, contrary to the loading process, and the excavation and transportation is repeated.

In the above embodiment of the present invention, the loading/unloading column 2 at the center of the silo is constructed of a collecting column, but the loading/unloading column 2 may be configured as a stacking tube or other structure. Furthermore, a screw conveyor can be used as the scraping device instead of a rake type chain conveyor.

<<Effects>> As described above, the apparatus according to the present invention is provided with a scraping device that extends from the loading/unloading column arranged at the center of the large powder storage container to the vicinity of the inner wall of the storage container, and Since the end portion is supported so as to be movable up and down and pivotable around the loading and unloading column, the raking device also rotates and rotates as the storage level of the powder and granules fluctuates up and down during loading and unloading of the powder and granules. Since it moves up and down, loading and unloading can be carried out smoothly, and it is possible to simplify the conventional system by omitting a complicated mechanism such as a trolley bucket cart with a harrow.

Furthermore, since the outer part of the raking device is supported by a trolley consisting of a rotating driving device with a cover that runs on the surface of the powder and granular material along the outer periphery of the storage container, it is not possible to store the material as before. There is no need to build or reinforce the inner wall of the container, making it possible, for example, to repurpose an existing petroleum storage tank as a large silo.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view showing the entire device according to the present invention, FIG. 2 is a sectional view of the loading/unloading column in the device of the present invention, and FIG. 3 is a cross-sectional view of the loading/unloading column and the inner frame of the swivel ring. FIG. 4 is a partial longitudinal sectional view showing the relationship between the loading/unloading column and the swivel ring. FIGS. 5 and 6 are views showing the outer end support structure of the scraping device. Figure 6 shows the position of the rake frame during unloading, Figure 7 shows the position of the rake frame during loading, Figure 7 is a partial cross-sectional side view showing the loading operation, and Figure 8 is a partial cross-sectional side view showing the unloading operation. It is a diagram. 1... Silo, 2... Loading/unloading column, 12...
Self-propelled rotating stack car reclaimer, 13...Swivel drive device, 14...Rake type chain conveyor,
17... Swivel ring, 18... Outer frame, 19... Inner frame, 26... Rake frame, 28... Cylinder, 29a, 29b... Cover band, 30... Rake blade.

Claims (1)

[Claims] 1. A loading/unloading column having vertical and horizontal openings is provided in the center of a large powder storage container, and a column extending from the loading/unloading column to near the inner wall of the storage container is installed in the center of the large powder storage container. A raking device is provided, and the inner end of the raking device is supported so as to be movable up and down and pivotable around the loading/unloading column, and the outer end of the raking device is supported so that the surface of the powder and granules can be scraped onto the outer periphery inside the storage container. 1. A scraping device for a large powder storage container, characterized in that it is supported by a trolley consisting of a swing drive device with a cover that runs by itself along the container.