RU97718U1 - BUNKER FOR HARD BULK MATERIALS - Google Patents

Abstract

 A bunker for hard-flowing materials, consisting of four walls connected in such a way that they form a curved truncated pyramid, characterized in that the walls of the bunker are made curved in accordance with the formula! ! where R is the radius of the circle inscribed in the upper (input) hole of the hopper, r is the radius of the circle inscribed in the outlet of the hopper.

Description

The utility model relates to devices for unloading bulk materials, namely to bunker devices.

A well-known hopper for bulk materials, comprising a housing in which a shaft with a spiral is mounted for rotation and axial movement, an additional hollow shaft rotating synchronously with it, is installed coaxially with the shaft, and the spiral is made of elastic material and the lower end is attached to the lower part of the shaft, and the upper - to the hollow shaft [Aut. St. USSR No. 1150178, B65D 88/68, 1985].

The disadvantage of this device is its complex design, lack of effectiveness in preventing the formation of arches, the need for energy supply.

Known bunker for bulk materials containing a working body, consisting of interconnected horizontally arranged one above the other contours made of elastic elements and springs, some ends of which are connected to the working body, and others to the walls of the hopper. The contours are interconnected by vertical elastic elements, and the springs are located symmetrically in the upper and lower parts of the hopper, while the elastic elements are springs and / or rods [RF Patent No. 2046083, B65D 88/64, 1995].

The disadvantage of this device is the insufficiently high efficiency of preventing the formation of arches, the use of springs in the working body.

Known bunker for bulk materials, representing four flat walls, connected in such a way that they form a truncated pyramid. The bunker has a constant angle of inclination of the wall to the vertical and a square cross section [Gyachev L.V. The movement of bulk materials in pipes and bins / L.V. Gyachev - M .: Mechanical Engineering, 1968. - S.13-16].

The disadvantage of this device is the low productivity and interruptions in the expiration of bulk materials.

Closest to the proposed utility model is a curved pyramidal hopper, consisting of four walls connected in such a way that they form a truncated pyramid. Curved walls are made in accordance with the formula:

where R is the radius of the circle inscribed in the upper (input) hole of the hopper, q _pr is the maximum flow rate of the hopper, g is the acceleration of gravity [Gyachev L.V. The movement of bulk materials in pipes and bunkers / L.V. Gyachev - M .: Mechanical Engineering, 1968. P.87-93].

The disadvantage is the low effectiveness of preventing the formation of arches.

The technical result is to increase the effectiveness of preventing the formation of arches and, as a result, reducing the time of unloading the hopper.

The technical result is achieved in that a curved pyramidal hopper, consisting of four walls, connected in such a way that they form a truncated pyramid, is characterized in that the walls of the hopper are made curved in accordance with the formula:

where R is the radius of the circle inscribed in the upper (input) hole of the hopper, r is the radius of the circle inscribed in the outlet of the hopper.

Figure 1 presents a General view of the hopper, where 1 is the vertical part of the hopper, 2 is the curved part of the hopper, R is the radius of the circle inscribed in the upper (inlet) hole of the hopper, r is the radius of the circle inscribed in the outlet of the hopper.

The hopper operates as follows. When the outlet is opened, wet grain material begins to flow out of the hopper, a continuous decrease in the inclination angle of the outlet part of the hopper reduces the pressure of the bulk material, which in turn leads to a decrease in the friction forces and the flow rate of the bulk material increases.

Figure 2 presents the curve of the longitudinal section of the hopper.

Below are examples of the implementation of the utility model.

Example 1

When 20% moisture from the model wheat bins expired, the capacity of the bins was: for the proposed curved bunker - 0.749 m ³ / s; for a flat-walled pyramidal hopper (Gyachev L.V. Movement of bulk materials in pipes and bunkers / L.V. Gyachev - M .: Mechanical Engineering, 1968. - S.13-16) - 0.649 m ³ / s; for a curved bunker according to the prototype (Gyachev L.V. Movement of bulk materials in pipes and bunkers / L.V. Gyachev - M.: Mechanical Engineering, 1968. - P.87-93) - 0.699 m ³ / s.

Example 2

When the expiration of model sunflower bins with a humidity of 25%, the performance of the bins was: for the proposed curved bunker - 0.605 m ³ / s; for a flat-walled pyramidal hopper - 0.509 m ³ / s. for a curved hopper according to the prototype - 0.567 m ³ / s.

Example 3

Upon the expiration of 30% humidity from the model wheat bins, the capacity of the bins was: for the proposed curved bunker - 0.623 m ³ / s; for a flat-walled pyramidal hopper - 0.533 m ³ / s; for a curved hopper according to the prototype - 0.586 m ³ / s.

Thus, the proposed hopper can reduce the time of unloading the hopper.

Claims (1)

A bin for hard-flowing materials, consisting of four walls connected in such a way that they form a curved truncated pyramid, characterized in that the walls of the bin are made curved in accordance with the formula

, where R is the radius of the circle inscribed in the upper (input) hole of the hopper, r is the radius of the circle inscribed in the outlet of the hopper.