RU217439U1 - UNLOADING MECHANISM - Google Patents

Abstract

The utility model relates to a four-roller unloading mechanism and can be used in column-type modular grain dryers. The unloading roller mechanism, containing metering rollers located symmetrically about the vertical axis of symmetry of the grain columns, equipped with an unloading mechanism drive with a certain gear ratio, is made of four rollers and contains two rollers for each half of the grain column, one of which is located near the inner more heated wall of the grain column and promotes the inner layer of grain in the grain column faster than the outer layer due to the difference in the gear ratios of the drive sprockets of the inner and outer rollers, and the second roller advances the outer layer of grain more slowly than the first, thereby ensuring uniform drying of the entire layer of grain in the grain column. The use of the utility model makes it possible to ensure uniform drying of the grain in the grain column. 3 ill.

Description

Field of technology to which this utility model belongs

This utility model relates to a four-roller unloading mechanism and can be used in column type modular grain dryers.

State of the art

In grain dryers of ADAKURUTMA modular grain dryers of the Turkish manufacturer CELIK KARDESLER IC VE DIS TICARET LTD. STI, a two-roller unloading mechanism is presented. The unloading mechanism is based on the principle of feeding grain at a certain speed by means of paddle metering rollers, it has two metering rollers, one roller in each half of the grain column. The dosing roller, rotating at a certain speed, advances the grain that fills the grain column at the appropriate speed and evenly unloads it into the area of the unloading auger of the grain dryer. By means of the described design, uniform heating of the grain is organized throughout the entire thickness of the grain column.

The disadvantages of the design of the closest analogue are:

1. Uneven heating of grain in the grain column as a result of greater heating of the inner layer of grain of the grain column, directly adjacent to the heating chamber, than the outer layer of grain, remote from the heating chamber.

Utility Model Disclosure

This utility model solves the problem of eliminating the shortcomings of the closest analogue and achieving a technical result in the form of a four-roller unloading mechanism design that provides the possibility of uniform heating of the entire grain layer in the grain column and, accordingly, ensuring uniform drying of the grain. This problem with the achievement of the noted technical result is solved by the fact that in this utility model the design of the unloading mechanism is proposed, with four dosing rollers, two of which 1, one for each half of the grain column, are close to the inner wall of the grain column 3, bordering the heating chamber , and two other rollers 2, one for each half of the grain column, are close to the outer wall of the grain column 4. The dosing roller 1, which is close to the inner, more heated wall of the grain column 3, rotates at a higher speed than the roller 2, which is close to the outer one, less heated wall of the grain column 4. As a result of different speeds of rotation of the metering rollers, organized by means of a different gear ratio of the drive sprockets of the metering rollers 5, the speed of advancement of the inner layer of grain 6 is higher than the speed of advancement of the outer layer of grain 7.

1. Brief description of sketches

In FIG. 1 schematically shows the design of the unloading mechanism of the ADAKURUTMA double-roller grain dryer of the Turkish manufacturer CELIK KARDESLER IC VE DIS TICARET LTD. STL. The sketch schematically shows the problem areas of grain overheating near the inner wall of the grain column.

In FIG. 2 shows the design of the presented four-roll unloading mechanism. The sketch shows the design of the unloading mechanism with the direction of grain movement inside the grain column shown by arrows and schematically depicted the different speeds of movement of the inner and outer layers of grain to the dosing rollers, the lower tray 8, the regulating gate 9 and the zone of the unloading auger 10, into which the dosing rollers supply the dried corn.

In FIG. 3 shows the design of the drive with a chain transmission of the presented four-roll unloading mechanism.

Detailed description of the embodiment.

The grain moves along the grain column 11 under the action of gravity. The factor limiting the speed of grain movement is the speed of rotation of the metering rollers 1 and 2. The inner metering rollers 1 rotate at a higher speed than the outer 2 due to the gear ratio between the drive sprockets 5 of the unloading mechanism drive, resulting in the inner layer of grain 6, close to panel 3 separating the heating chamber and the grain column moves faster than the outer layer of grain 7 close to the panel 4 separating the grain column from the environment. The speed of rotation of the drive of the unloading mechanism, determined by the speed of rotation of the worm gear motor, is regulated by an electric frequency converter. In the lower part, under the dosing rollers, trays 8 are installed, preventing spontaneous spillage of grain into the unloading auger area. Trays 8 are installed with a constant clearance relative to the top of the metering roller blade. In the place where the grain is picked up by the blades of the dosing roller, adjusting gates 9 are installed, which allow you to adjust the thickness of the layer of grain fed into the area of the blades of the dosing rollers. Thus, it is possible to adjust the performance of each dosing roller in each grain column.

Claims (1)

Unloading roller mechanism containing metering rollers located symmetrically about the vertical axis of symmetry of the grain columns, equipped with an unloading mechanism drive with a certain gear ratio, characterized in that the mechanism is made of four rollers and contains two rollers for each half of the grain column, one of which is located near the inner more heated wall of the grain column and advances the inner layer of grain in the grain column faster than the outer layer due to the difference in gear ratios of the drive sprockets of the inner and outer rollers, and the second roller advances the outer layer of grain more slowly than the first, thereby ensuring uniform drying of the entire grain layer in the grain column.

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