JPS587578B2 - 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 floor scraping silo in which the loose materials are scraped and discharged using a plurality of connected sweep devices.

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.

When a silo is used to store bulk materials with poor fluidity such as wood chips, sawdust, perc, bagaz, cottonseed, ore, and crushed waste, when the shape is configured as described above, the loose materials become entangled with each other and cause a bridging phenomenon. This causes various inconveniences.

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

The structure of a conventional floor scraping silo is shown in Figures 1 to 3.
A sweep device 2 that rotates on the flat floor surface 1, a collection conveyor 3 and a discharge conveyor 4 provided below the staggered floor surface 1 are provided respectively, and a truncated hollow cone-shaped storage is provided on the flat floor surface 1 at an appropriate height. A cylinder 5 is provided via a frame 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. A pull ring 8 is rotatably provided via a circular rail 10 concentric with 5 and connected to one end of the packet 9, and a weight 9a is connected to the free end of the packet 9.

In the floor scraping silo having such a configuration, first, bulk materials are introduced from above the silo by the carrying conveyor 7, and the bulk materials deposited on the multi-layered floor surface 1 are held and stored three-dimensionally by the storage cylinder 5.

To discharge the stored bulk materials, the pull ring 8 is rotated and the conveyor 4 for carrying out is carried out.

That is, the rotation of the pull ring 8 causes the connected packet 9 to slide on the staggered surface 1, and the action of the weight 9a at its free end causes the packet 9 to bend and slide 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 bucket 9 and transferred to the collection conveyor 3.
The silo is then directly delivered to the outside of the silo by the delivery conveyor 4.

In the floor scraping silo, the sweeping device scrapes the loose materials from the base of the pile, so the greatest advantage is that there is no bridging phenomenon, but there are drawbacks as described below.

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

(2) During the sliding movement of the packet, if an excessive amount of loose objects are brought in or if a part of the pile collapses, the packet may become buried under the loose objects, increasing resistance and making it impossible to pull out. 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 the bulk material to be stored contains a lubricating substance, the floor surface will be lubricated and the frictional drag of the weight will be lost, causing the baguette to accumulate around the outer periphery. It no longer wraps around the body, and it becomes impossible to pay it out.

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

(4) The packet is formed horizontally, which is one way to increase the amount of loose material scraped, but on the packaging side, if the amount of loose material accumulated is small, it will cause a large amount of winding. Requires strength.

On the other hand, 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 are pushed out to the outer periphery.

The pushed-out bulk material then spills out of the silo from between the lower end of the storage cylinder and the pull ring, causing an inconvenience.

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

Examples will be explained 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 disposed on the floor surface 12 so as to be mutually bendable and slidable on the floor surface 12, and one end of the scraper 21 is connected to a high place inside the traction device 15. The sweep device 22 is connected to the sweep device 22 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.

Next, FIG. 6 is an enlarged perspective view of the scraper 21, in which connecting parts 21a and 21b are provided at the front and rear ends, respectively, a scraping plate 20 is provided approximately vertically protruding below the front end, and the upper part is transversely A mountain-shaped cover 19 formed in an inverted ■-shape is attached.

The scrapers 21 are flexibly connected to each other by, for example, pins to form the sweep device 22.

Next, the operation of the above configuration will 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 peripheral foot of the bulk material pile 25. and slides on the floor surface 12.

Therefore, the bulk materials are successively scraped off by the scraper 21, fall onto the collection conveyor 14 provided below the floor surface 12 via a grid (shown in the figure), reach the unloading conveyor 4, and are transported out of the silo. .

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 25, 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 15,
In addition, the loose materials crumbling from the bulk material pile 25 in the storage cylinder 16 are made to rise along the inside of the wall, and the scraper 21 is raised together with the bulk materials to prevent the loose materials from flowing below the storage cylinder 16.

In addition, the scraping plate 20 protruding below the scraper 21 is used to scrape loose objects that are to be caught on the front surface when sliding on the floor surface 12. Promotes the action of spirally wrapping around the base of the peripheral edge of the object.

Further, as the sweep device 22 slides forward, the amount of loose material to be scraped increases sequentially, but when the amount exceeds a certain amount, the balance with the scraper 21's own weight is broken, so there is a force pushing the scraper 21 upward through the cover 19. acts.

Therefore, the sweep device 22 formed by connecting the scrapers 21 is rotated in the bottom chamber 11 by the traction device 15, and sweeps over the surface of the loose material pile 25 to scrape up the loose materials.

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 floor scraping silo provided with the bottom chamber of the present invention has the structure and function as described above, it can achieve the following effects.

(1) By forming the bottom chamber into a concave surface that gradually becomes lower toward the center, the sweeper constructed by connecting multiple scrapers can be easily cleaned at the base of the periphery of bulk material accumulation without having to attach a weight to the end of the sweeper. It can be wrapped around a part, and there is no need for a strong traction device.

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

(3) By providing the scraper with a scraping plate and a cover, scraping resistance and floating action are generated when the scraper scrapes loose objects from the floor surface, so there is no need to attach a weight to the free end of the sweep device. The sweep device can spirally wrap around the pile of bulk materials, and even if the sweep device is buried in the collapsed bulk materials, it can be easily escaped, and there is no need for a strong traction device.

[Brief explanation of the drawing]

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 the scraper constituting the sweeper, Fig. 4 is a partially sectional front view of a silo showing an embodiment of the present invention, Fig. 5 is a partially fragmented plan view of the same, and Fig. 6 is an enlarged view of the scraper. FIG. 11...Bottom chamber, 12...Floor surface, 13...Outer wall, 1
5... Traction device, 16... Storage tube, 21... Scraper, 22... Sweep device.

Claims (1)

[Claims] 1 In a silo equipped with a floor scraping device below the storage cylinder,
A bottom chamber facing the lower surface of the storage cylinder is provided, the floor surface constituting the bottom chamber is formed into a concave surface gradually lowering toward the center, and an outer wall surrounding the lower end of the storage cylinder is provided on the outer periphery of the bottom chamber. ,
A sweep device is provided rotatably and slidably on the floor between the storage cylinder and the bottom chamber facing below, and the sweep device includes a plurality of scrapers each having a cover provided on the top of a scraping plate arranged in series and bendable. 1. A floor scraping silo provided with a bottom chamber, characterized in that a sweeper is formed by being connected to the outer wall, and a traction device is freely disposed on the outer wall and is connected so as to be able to change direction.