JPS587577B2 - 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 sweep device 2 that rotates on 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 cone-shaped storage is provided at an appropriate height above the flat floor surface 1. A cylinder 5 is provided via a frame 6, and a carrying 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 storage cylinder 5, 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 structure.

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 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 wrap multiple connected packets around the outer periphery of the pile of loose materials 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 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 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 packet 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, and this is one way to reduce the amount of loose particles scraped.However, in terms of mounting, if the accumulated loose particles are small, the wrapping will be large. 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 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, which is formed by providing an outer wall 13 in the shape of a hollow cylinder around the outer periphery of the 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 disposed 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.

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 plate 20 is provided in a protruding manner, and connecting seats 21a and 21b are provided at both ends in the direction of the peak, each having a fitting structure.

The scraper 21 is bendably connected in the direction of the peak 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 its low stakes move 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 accumulation 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. 25 to scrape up the loose materials, scrape the broken up loose materials up to the top of the collecting conveyor 14, drop them through a grid (not shown) on the collecting conveyor 14, and transfer them to the collecting conveyor 14 and the unloading conveyor. 4, it is carried out of the silo.

When the scraper 21 scrapes loose materials and scrapes them together, the front surface of the scraper 20 piles up the scraped materials into a mountain shape as it advances, and the loose materials scraped off by the front of the cover 19 join this, Since the cover 19 is pulled over 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 carry-in conveyor 17, the bulk material pile 25 in the bottom chamber 11 grows large, and the bottom part of the bulk material pile 25 is stored. It expands to the outside of the 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 quasi-volume 25 of bulk materials 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 landing on the upper surface of the bulk material, when the hem of the bulk material pile 25 expands to the outside of the storage cylinder 16, the rotating scraper 21 also stores. It rotates outside the tube 16.

The scraper 21 rotating 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, the scraper 21 provided with a scraping plate 20 under the cover 19 can freely float above the loose materials, and the bottom chamber 11 having an outer wall 13 surrounding the lower end of the storage cylinder 16 prevents the loose materials from spilling out. It is.

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 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 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.

(2) By providing the scraper with a scraping plate and a cover, scraping resistance and floating action are created 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. In addition, the sweep 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 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 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 cylinder, 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, a sweep device is provided rotatably and slidably on the floor between the storage cylinder and the bottom chamber facing below, and the lower end of the storage cylinder is provided on the outer periphery of the bottom chamber. An outer wall is provided surrounding the outer wall, and the sweeping device has a sweeper formed by connecting a plurality of scrapers each having a cover on the upper part of the scraping plate in series and bendably, and a traction device rotatably provided on the outer wall. A floor scraping silo equipped with a bottom chamber characterized by being configured to be freely connected.