JPS5823306B2 - Yukagaki Silo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a silo with a bottom chamber for storing so-called bulk materials with poor fluidity and discharging them in a timely manner as needed, and allows packets to be bent freely along the periphery of the bulk material pile. This invention relates to a raw material silo in which the loose materials are broken down and discharged using a sweeping device formed by connecting a plurality of them.

A silo for storing so-called bulk materials such as powder, granules, and crushed materials has a storage chamber formed by connecting an inverted conical hollow cone to the bottom of a hollow cylinder, supported by a frame or other means, and a storage chamber at the bottom end of the storage chamber. A discharge port that can be opened and closed is provided to discharge stored bulk materials as needed.

As a silo for storing loose materials with poor fluidity such as wood chips, sawdust, park, bagasse, cottonseed, ore, and crushed waste, when using the above-mentioned configuration, the loose materials become entangled with each other and cause a bridging phenomenon. This causes various inconveniences.

Therefore, a storage cylinder formed into a hollow cylinder is installed on a flat floor surface,
A raw material silo is used which is equipped with a scraping device or a sweeping device that has the function of scraping and discharging loose materials from the floor surface.

The structure of a conventional seed silo is shown in Figures 1 to 3.
A sweep device 2 that rotates the flat floor surface 1, a collection conveyor 3 and a delivery conveyor 4 provided below the flat floor surface 1 are provided respectively, and a truncated hollow conical shape is provided above the flat floor surface 1 at an appropriate height. A storage cylinder 5 is provided via a pedestal 6, and a carry-in conveyor 7 is provided above the storage cylinder 5.

The sweep device 2 connects a plurality of horizontal packets 9 having a shape as shown in a perspective view in FIG. Tube 5
A bull ring 8 is rotatably provided via a circular rail 10 concentric with the packet 9, and one end of the packet 9 is connected to the bull ring 8, and a weight 9a is connected to the free end of the packet 9.

In the pressure-loss silo constructed as described above, bulk materials are first introduced from above the silo by the carrying conveyor 7, and the bulk materials deposited on the flat floor surface 1 are held and stored three-dimensionally in the storage cylinder 5.

To discharge the stored bulk materials, the bull ring 8 is rotated and the discharge conveyor 4 is used.

In other words, by turning Pururinmitsu 80 times, the connected packet 9
The packet 9 slides on the flat floor surface 1''2, and by the action of the weight 9a at its free end, the packet 9 bends and slides toward the center of the silo.

The connected packets 9 are then swept in a spiral,
Since the loose materials wrap around the base of the pile, the loose materials at the base of the pile are scraped off by the packet 9 and transferred to the collecting conveyor 3.
The silo is then discharged outside the silo by the conveyor 4 or directly by the conveyor 4.

In the raw material silo, the sweeping device scrapes away the loose material from the base of the pile, so the biggest advantage is that there is no bridging phenomenon, but it has the following drawbacks.

(1) In order to obtain the force to wrap multiple connected packets around the outer periphery of the bulk pile and scrape them off, it is necessary to provide a dog weight at the free end of the packet, and the drive device that rotates the bull ring is It must be large and powerful.

(2) During the sliding movement of the packet, if an excessive amount of loose material is carried in, or if part of the pile collapses, the packet may become buried under the loose material, increasing resistance and making it impossible to extract it. This may cause accidents such as damage to the packet connection section and damage to the drive unit.

(3) A weight is attached to the free end of the packet, but if a lubricating substance gets mixed into the bulk material to be stored and the temperature rises, it lubricates the floor surface and loses the frictional drag of the weight, causing the packet to It no longer wraps around the outer periphery of the pile, making it impossible to dispense.

Similar accidents also occur when the floor surface becomes worn and smooth.

(4) When the floor of the silo is filled with loose materials, the loose materials in contact with the floor surface are scraped down, and the loose materials above push the scraped loose materials toward the outer periphery.

The bulk material thus pushed out causes an inconvenience in that it spills out of the silo from between the lower end of the storage cylinder and the bull ring.

The purpose of the present invention is to eliminate the various drawbacks of the conventional raw seed silos as described above, and to provide a highly reliable raw seed silo that has low scraping resistance and prevents stored materials from spilling outside the silo. .

Examples will be described below with reference to the drawings.

FIGS. 3 and 4 are a partially cutaway front view and a partially cutaway plan view of a silo showing an embodiment of the present invention, respectively.

In both figures, 11 is the bottom chamber of the silo, and the floor surface 12 is an inverted conical concave surface that is gradually lowered toward the center, and an outer wall 13 is provided in the shape of a hollow cylinder around the outer periphery. .

A collection conveyor 14 facing the floor 12 through a grid (not shown) is provided below the floor 12 formed into a central concave surface. to appear.

Next, a ring-shaped traction device 15 is rotatably mounted on the outer wall 13 of the floor surface 12.

A plurality of scrapers 21 having a scraping function are arranged on the floor surface 12 so as to be mutually bendable and slidable on the floor surface 12, and one end thereof is placed at a high place inside the traction device 15. The sweep device 22 is connected via a universal joint (not shown).
form.

Reference numeral 16 denotes a storage cylinder, which is formed into a hollow cylindrical shape and is supported and fixed by support columns 18. The lower end of the storage cylinder 16 is sunk into the bottom chamber 11 and is provided at an appropriate distance from the floor surface 12.

Reference numeral 17 denotes a carry-in conveyor, which is provided with its discharge end facing the upper part of the storage cylinder 16.

The operation of the above configuration will now be explained.

First, when bulk materials are transported into the storage cylinder 16 by the conveyor 17, a conical pile 25 is formed on the floor surface 12 according to the angle of repose of the bulk materials.

Next, when the traction device 15 mounted on the outer wall 13 is rotated via a drive device (not shown), the sweep device 22 wraps the bendable scraper 21 around the periphery of the bulk material pile 250. It slides on the floor surface 12.

Therefore, the loose materials are successively scraped off by the scraper 21, fall onto the collecting conveyor 14 provided below the floor 12 via a grid (not shown), reach the unloading conveyor 4, and are transported out of the silo. It is.

In this case, since the floor surface 12 is an inverted conical surface that is gradually lowered toward the center, the scraper 21
The free end of the sweep device 22 is always connected to the floor surface 1.
It receives a force directed toward the center of 2, and is made to act so as to wrap around the conical bulk pile.

Therefore, the sweep device 22 is always located at the foot of the periphery of the pile of loose materials 250, and it can be ensured that there will be no problem in scraping the loose materials.

Note that the outer wall 13 acts as a rotation guide for the traction device 150,
In addition, the loose materials that crumble from the bulk material pile 25 of the storage cylinder 16 are made to rise along the inside of the wall, and are scraped together with the loose materials by the scraper 2.
1 to prevent loose materials from flowing below the storage cylinder 16.

In this example, the floor surface is formed into an inverted conical matrix surface, but if the floor surface is formed into a concave surface that gradually becomes lower toward the center, the longitudinal section of the sloped surface will not be linear. It's okay.

It goes without saying that the shape of the storage cylinder can be appropriately selected from a right cylindrical shape, a truncated conical shape, a hemispherical shape, etc. depending on the properties and capacity of the bulk materials.

Since the pressure drop silo provided with the bottom chamber of the present invention has the structure and operation as described above, it can achieve the following effects.

(1) By forming a concave surface that gradually becomes lower toward the center of the bottom chamber, it is possible to eliminate the need to attach weights to the ends of the sweeper, which is constructed by connecting multiple scrapers. It can be wrapped around the hem, and there is no need for a powerful traction device.

(2) By providing an outer wall around the outer periphery of the bottom chamber, loose materials flowing out from the storage cylinder move upward along the outer wall from the floor surface of the sweeper, so the sliding of the sweeper also prevents loose materials from floating on the floor surface. Materials do not flow or overflow outside the silo.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a conventional silo, Figure 2 is a plan view of the same,
FIG. 3 is an enlarged perspective view of a scraper constituting the sweeper, FIG. 4 is a partially sectional front view of a silo showing an embodiment of the present invention, and FIG. 5 is a partially exploded plan view of the same. 11: bottom chamber, 12: floor surface, 13: outer wall, 15: traction device, 16: storage cylinder, 21 varnish scraper, 22: sweep device.

Claims (1)

[Claims] 1 In a silo with a seed device installed below the storage cylinder,
A bottom chamber is provided, which has a concave floor surface facing downwardly of the storage cylinder at an interval, and an outer wall surrounding the lower end of the storage cylinder around the outer periphery of the floor surface, and a ring-shaped traction device rotatably attached to the outer wall. What is claimed is: 1. A seed silo equipped with a bottom chamber, characterized in that one end of a sweep device consisting of a plurality of bendably connected scrapers is connected to a traction device.