JPS587576B2 - 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 a machine for scraping and discharging loose materials on the floor surface.

The structure of a conventional floor scraping silo! As shown in FIGS. 1 to 3, a sweep device 2 that rotates on a flat floor surface 1, a collection conveyor 3 and a carry-out conveyor 4 provided below the flat floor surface 1 are provided, respectively. A truncated hollow conical storage cylinder 5 is provided at an appropriate height via a pedestal 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 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 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 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 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.

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.

On both sides, reference numeral 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 on the outer periphery in the shape of a hollow cylinder.

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 connections 21a and 21b are provided at the front and rear ends, a scraper plate 20 is provided approximately vertically protruding below the front end, and the upper part has a cross section. A mountain-shaped cover 19 formed in an inverted V 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 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 25, and it can be ensured that there will be no problem in scraping the loose materials.

Note that the outer wall 13 serves as a rotation guide for the traction device 15.

In addition, the scraping plate 20 protruding from the bottom of the scraper 21 scrapes loose objects that it tries to catch on the front surface when it slides on the floor surface 12, and its resistance causes the sweep device 22 to scrape loose objects. 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 materials to be scraped increases gradually, but if the amount exceeds a certain amount, the balance with the scraper 21's own weight is broken, so the scraper 21 is pushed upward through the cover 19. A lifting force acts.

Therefore, the sweep device 22 formed by connecting the scrapers 21 is rotated within 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 parts and the traction device does not need to be powerful.

(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. 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 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 that constitutes a swiver, 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. DESCRIPTION OF SYMBOLS 11... Bottom chamber, 12... Floor surface, 13... Outer wall, 15... 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, the floor surface constituting the bottom chamber is formed into a concave surface gradually lowering toward the center, and a sweep device is rotated between the storage cylinder and the bottom chamber facing downward. The sweep device is movable and slidable on the floor surface, and the sweep device includes a sweeper formed by connecting a plurality of scrapers each having a cover on the top of a scraping plate in series and flexible, and a sweeper movable around the outer periphery of the bottom chamber. A floor raking silo equipped with a bottom chamber, characterized in that the silo is configured by connecting a traction device provided in the silo so as to be able to freely change direction.