JPS583787Y2 - Silo for powder and granular materials - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of the T-4 silo for powder and granular materials.

Conventionally, as shown in Figure 1, a silo for powder and granular materials has a funnel-shaped bottom to take out its contents, and removal is performed by operating an opening/closing door such as a rotary valve A. In some cases, pressure from above may cause the contents to form a bridge as shown in Figure 1, making removal difficult.

In order to avoid this, as shown in Figure 2, the bottom is made flat and grooves B are made in the lattice material in the diametrical direction, and several chain-shaped scraping mechanisms attached to the bottom outer ring C are used to pull the bottom. A method has been devised in which the silo is rotated to scrape the contents into groove B, but this requires a large amount of force to rotate because when the silo is full, the scraping chain D receives the tonosho together. At the same time, since the rotation is along the outer periphery, the scraping efficiency is also poor, and earth pressure is applied to the conveyor E in the take-out groove.

Therefore, grids have been installed to reduce this problem, but there is also the risk of blind spots.

In addition, there is a possibility of a chain breakage accident due to sudden loads such as sagging inside the chain.

Furthermore, there are drawbacks such as the need to completely remove the contents in the event of an accident such as chain breakage or machine maintenance.

Next, when considering increasing the size of the silo, in method 11 of Figure 2, the length of the chain cannot be made that long, so the cylinder needs to have a double structure and drive in two stages, inside and outside. Structurally complex.

Another way to increase the size is to arrange several funnel-shaped hoppers F in waves as shown in Figures 3 and 4, but this does not solve the problem of the bridge in the funnel part mentioned above. Hopper F opening/closing door (feeder) G
Considerable strength is required because particle pressure is directly applied to the material.

Furthermore, in the event of a failure or maintenance of these attachment mechanisms, it is necessary to completely remove the contents.

There are drawbacks such as. The present invention & cross section V at the bottom of cylindrical silo
A powder scraping device consisting of one or several circular continuous hoppers in the shape of a letter, a slit opening toward the center or the outer periphery at the lower end of the hopper, and an impeller partially located within the slit. is installed so that it can run along the slit, and a powder silo with openings at appropriate locations is provided at the bottom of the travel path of the scraping device, and the powder and granular material is placed outside the silo at the bottom of the opening. A conveyor for discharging powder and granules is installed in a radial direction from the center of the silo, and a scraping plate is movably provided in the gutter for moving into the gutter and discharging the powder from the opening to the conveyor. The object of the present invention is to provide a silo for powder and granular materials that has an extremely compact structure and eliminates the drawbacks of the conventional methods.

The present invention will be described below with reference to illustrated embodiments.

5 to 9 show an embodiment of the present invention, in which 1 is a silo body, and at the bottom of the silo, funnel-shaped partition walls 2 and conical partition walls 2' are arranged alternately at regular intervals. Several slits 3 are arranged, and the partition walls 2 and 2' form one to several circular slits 3 as shown in FIG. 8 as shown in FIG.

When powder or granules are introduced from above into a silo having a bottom with such a structure, the powder or granules come to rest in the shape shown by the dots in FIG. 8 and no longer leak out.

In this state, an impeller 4 is inserted into the lower part of the slit 3 as shown in FIG. 8, and is rotated to scrape out the powder and granules, and a scraping device 5 is placed on the conveyor 8 located below.

This scraping device 5 runs on wheels 6 provided in itself on a lenir 7 laid in a circular shape along the slit 3.

While the scraping device 5 is running, the powder scraped out by the rotation of the impeller 4 is dropped onto the accumulating conveyor 8 which is also laid in a circular shape between the rails γ.

The powder and granules G carried on the accumulating conveyor 8 are dropped onto one or several carry-out conveyors 9 arranged in the diametrical direction of the silo at the lower part thereof, are collected, and are conveyed out of the silo.

The accumulation conveyor 8 may be constructed of a gutter-like passage 8' as shown in FIG. In this system, the powder and granular material between the links 10 is conveyed while being pushed along the passage 8' by the drive, and a hole is made in the passage 8' at the connection point to the carry-out conveyor 9 so that it falls.

However, the accumulating conveyor 8 can also be configured with a slat chain conveyor or a chain conveyor mounted with a flexible belt.

The present invention is constructed as described above, and by applying the present invention to a powder silo, problems caused by the structure of the bridge for the contents can be solved compared to the conventional hopper set extraction system.

In addition, in this invention, a powder scraping device is adopted, which makes it easy to take out a fixed quantity, and by arranging multiple slits and setting the running speed and impeller rotation speed of the scraping device, the removal can be made evenly over the entire surface of the silo. (flattening the residual material in the silo).

Furthermore, the granule pressure of the stored powder and granules is received by the partition wall at the bottom of the silo and is not suppressed by mechanical parts such as on-off valves and doors, so there is less chance of failure, and furthermore, in the event of an accident, the machine Even in the event of a breakdown, maintenance can be performed regardless of the contents.

There is an advantage.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view of a conventional silo, Fig. 2 is a schematic perspective view of a scraping device used in the conventional silo, Fig. 3 is a schematic sectional view of another conventional silo, and Fig. 4 is a schematic sectional view of another conventional silo. Figure 3 IV-
5 to 9 are cross-sectional views taken along line IV, and FIG. 5 is a schematic sectional view thereof, and FIG.
7 is a sectional view taken along the line I-VI, FIG. 7 is a sectional view taken along the line ■-■ in FIG. 5, FIG. 8 is an enlarged sectional view of the main parts, and FIG. FIG. 2 is a partial perspective view showing the relationship. 1... Silo, 3... Slit, 4.
... Impeller, 5 ... Scraping device, 8 ...
... Accumulating conveyor, 9... Outgoing conveyor
10... Scraping board.

Claims (1)

[Scope of utility model registration request] A circular continuous hopper with a V-shaped cross section is installed at the bottom of the cylindrical silo.
A strip or several strips are provided, and a slit that opens toward the center or the outer circumference is provided at the lower end of the hopper, and a powder scraping device consisting of an impeller partially located within the slit can run along the slit. A powder accumulator is installed at the bottom of the travel path of the scraping device and has openings at appropriate locations, and a conveyor for discharging the powder and granules out of the silo is placed at the bottom of the opening at the center of the silo. A scraper plate is movably provided in the gutter and extends in a radial direction from the gutter and moves in the gutter to discharge the powder and granule from the opening to the conveyor. silo.