JPS60171934A - Bottom scratching method of silo - Google Patents

Abstract

PURPOSE:To limit the burrying resistance of sweeper by functioning a proximity switch burried in the floor face through a magnet coupled to a sweeper rotatable on the floor face while functioning an arch breaker on the floor face and collapsing the arch of stored material. CONSTITUTION:A magnet 8 is provided on a sweeper 4 for coupling a plurality of scrapers and rotated along the base of arching C. A proximity switch 9 is provided on the face of flat floor 1 and functioned through the magnet 8 to operate an arch breaker 10 thus to collapse the arching C forcefully. Consequently, the burrying resistance of sweeper 4 is limited below predetermined level to enable operation of sweeper 4 at anytime.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of scraping the bottom of a flat-bottomed scraping silo for discharging the stored material, and particularly to a method of preventing silos from being buried.

The structure and operating method of a conventional flat-bottom S silo are as follows.
As shown in Figure 2, the dumplings are deposited and stored in a silo with a flat bed 1 as the bottom and a cylindrical shell 2 vertically erected above it. One end of a sweeper 4 disposed so as to sweep over the surface of the flat bed 1 is connected to the inside of a rotatably provided annular bull ring 3, and by rotating the bull ring 3, the sweeper 4 is swept over the flat bed L, and the bottom of the accumulated debris B is scraped off by the sweeping sweeper 4. A conveyor 5 passing through the center of the flat bed 1 is recessed, and the scraped material is carried out by the conveyor 5. The amount of accumulated material B is measured by a calibration weight 6 suspended from above the cylindrical shell 2 so as to be movable up and down.

However, in the conventional silo, when the sweeper 4 scrapes off the scattered materials, there is no arching at the bottom of the scattered materials accumulation B.
I can do it. Since this arching C cannot be detected by the calibration weight 6, it gradually becomes larger and eventually collapses naturally. When the pile B of dumplings collapses naturally, the sweeper 4 is buried under a large amount of dumplings, and this burying resistance causes the sweeper to collapse.
4 had the drawback of not being able to rotate.

In view of the above-mentioned drawbacks, it is an object of the present invention to provide a method for forcibly breaking the arching as appropriate, regulating the rotational resistance of the sweeper, and maintaining an operable state at all times.

Embodiment 7 This invention will be explained with reference to the drawings. FIG. 3 is a vertical cross-sectional view of a Chinese-style silo used for explaining this embodiment, and FIG. 4 is a plan view of the floor surface. Parts common to the conventional ones are designated by the same reference numerals, and their explanation will be omitted.

Sweeper 4 that connects multiple scrapers in a flexible manner
A magnet 8 is provided at the free end of the flat bed via a non-magnetic material 7, and the magnet 8 is rotated along the base of the arching 0 of the debris scraped by the sweeper 4 rotating on one surface of the flat bed. A proximity switch 9 is provided on the surface of the flat floor 1 at a regulating strap that limits the amount of fallen materials within a certain amount, and this proximity switch 9 is activated by a magnet 8. Then, the base dimension of arching C is detected. When the proximity switch 9 is activated, a signal is sent to the outside via a transmitter or lead wire connected to the proximity switch 9.

And in the center of the flat bed 1 there is a rotatable arch breaker 10.
The arch breaker IO is operated by the signal from the proximity switch 9, the arching C is forcibly collapsed by operation of the arch breaker 10, and the burying resistance of the sweeper 4 is limited to a constant (+1 or less), and the sweeper 4 is This makes it possible to operate at all times.

As explained above, in this invention, the size of the arch is detected by the sweeper's magnet and the proximity switch on the flat bed, and the arch is forcibly collapsed by the arch breaker, so that the buried resistance of the sweeper is below a certain value. regulated,
It is now possible to maintain a state in which the sweeper can perform the dispensing operation even if it is operated arbitrarily.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway plan view of a conventional flat-bottomed silo, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is an all-in-one diagram of the flat-bottomed silo used for detailed explanation of the present invention. The fourth surface is a plan view showing a part of the floor surface of FIG. 3. l: flat bed, 4 nisiver, 8: magnet, 9: proximity switch, 10: arch play force agent patent attorney Honma prize/figure 2 figure 3 figure 4 figure

Claims (1)

[Claims] In a method for scraping and discharging stored materials from the bottom of a flat-bottomed silo, a proximity switch buried in the floor of the flat-bottomed silo is actuated by a magnet connected to the tail end of a sweeper that rotates on the floor. A method for scraping the bottom of a silo, characterized in that an arch breaker provided on the floor is activated in response to a signal emitted by activation of a switch, thereby collapsing an arch formed at the bottom of the storage material.