JPS587575B2 - 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, park, bagasse, cottonseed, ore, and crushed waste, when the shape is configured as described above, the bulk materials become intertwined 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 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 sweeping device 2 that rotates on the flat floor 1, a collection conveyor 3 and a carry-out conveyor 4 provided below the flat floor 1 are provided, respectively, and a truncated hollow cone-shaped storage is provided at an appropriate height above the flat floor 1. 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 the packet 9, and one end of the packet 9 is connected to the pull ring 8.
A weight 9a is connected to the free end of the holder.

In the floor scraping silo constructed as described above, first, bulk materials are introduced from above the silo by the carrying conveyor 7, and the bulk materials accumulated on the flat 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 flat floor 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 packet 9 and transferred to the collecting 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 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 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 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 bucket joint and damage to the drive unit.

(3) The packet is formed horizontally, and this is one way to increase the amount of loose material scraped. However, on the packaging side, if the amount of loose material accumulated is small, it will cause a large amount of wrapping. Requires force.

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 a bottom chamber of the silo, and an outer wall 13 is provided in a hollow cylindrical shape on the outer periphery of a floor surface 12.

A collection conveyor 14 is provided below the floor 12 and is exposed through a grid (not shown), with its delivery end facing the delivery conveyor 4 at the center of the floor 12.

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, and the lower end of the storage cylinder 16 is provided with an appropriate distance from the floor 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 shows an enlarged perspective view of the scraper 21. A mountain-shaped cover 19 with an inverted V-shaped cross section is provided on the upper part of the scraper 21. A scraper plate 20 is provided protrudingly, and connecting seats 21a and 21b having a meshing structure are provided at both ends in the peak direction, respectively.

The scraper 21 is bendably connected to the peak direction of the cover 19 via a pin or the like, and a universal joint is attached to one of the connected scrapers 21 to constitute the sweep device 22.

The effect of the above configuration will be explained next.

When the traction device 15 placed astride the outer wall 13 is rotated by a drive device (not shown), the scraping plate 20 of the scraper 21 scrapes over the floor surface 12, and due to the resistance, the sweep device 22
The scraper 21 connected to the sweep device 22 shows the phenomenon that the free end of the scraper tends to move to the center of the floor surface 12.
is wrapped around the hem of the bulk material pile 25.

The scraper 21 wrapped around the hem of the bulk material pile 25 is pulled by the traction device 15 and rotates around the outer circumference of the hem of the bulk material 25, while scraping the front edge of the cover 19 and the side surface of the scraper plate 20. The pile 25 is cut into to break up the loose materials, the broken up loose materials are scraped up to the top of the collecting conveyor 14, are dropped through a grid (not shown) on the collecting conveyor 14, and are carried out by the collecting conveyor 14. The conveyor 4 carries it out of the silo.

When the scraper 21 scrapes loose materials and scrapes them together, the front surface of the scraping board 20 piles up the scraped materials as it advances, and the loose materials scraped off by the front edge of the cover 19 join this. Since the cover 19 is pulled so as to rest on the combined loose materials, the scraper 21 can escape even if it is buried.

Next, when the collection conveyor 14 and the discharge conveyor 4 are stopped and the bulk materials are introduced by the conveyor 17 for carrying in, the bulk material pile 25 in the bottom chamber 11 grows so that the hem of the bulk material pile 25 becomes the storage cylinder. 16, and the expanding outer periphery is blocked by the outer wall 13.

Furthermore, when the conveyor 17 continues to supply loose materials, the outer wall 1
3, the bulk accumulation 25 in the bottom chamber 11 is prevented from expanding on a plane. When the height is reached, the flow resistance of the loose materials flowing out from the inside of the storage cylinder 16 increases rapidly, and the flow of the loose materials in the bottom chamber 11 stops.

When the loose material in the bottom chamber 11 stops, the storage cylinder 1 above it
Since the bulk material accumulation 25 in the storage tube 16 increases toward the top of the storage tube 16, the supply of bulk materials is stopped before the bulk materials overflow from the storage tube 16.

As described above, the scraper 21 that rotates by wrapping around the hem of the bulk material pile and riding on the upper surface of the bulk material, will also rotate when the hem of the bulk material pile 25 expands to the outside of the storage cylinder 16. It rotates outside the storage cylinder 16.

The scraper 21 that rotates outside the storage cylinder 16 is attached to the outer wall 1.
3 and the storage cylinder 16 and rotate to evenly level the loose materials in that area.

Therefore, a scraper with a scraping plate 20 provided under the cover 19 was used.
The bottom chamber 11, which has an outer wall 13 surrounding the lower end of the storage cylinder 16, prevents loose objects from spilling out.

In this example, the shape of the storage cylinder is a combination of a right cylinder and a truncated cone. It goes without saying that shapes such as a hemispherical shape or a hemispherical shape can be selected as appropriate.

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

In other words, by providing the scraper with a scraping plate and a cover, when the scraper scrapes loose objects from the floor surface, it creates scraping resistance and floating action, so it is possible to sweep without attaching a weight to the free end of the sweep device. The device can be spirally wrapped 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 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 bendably. A floor scraping silo provided with a bottom chamber, characterized in that a sweeper formed by connecting and forming a sweeper and a traction device rotatably provided on the outer periphery of the bottom chamber are connected in a changeable manner.