RU182574U1 - MOBILE GRAIN CLEANING DEVICE - Google Patents

Abstract

The utility model relates to agricultural machinery, namely to mobile grain cleaning machines for cleaning grain heaps from impurities. The technical result of the utility model is to increase the productivity of a mobile grain cleaning device for a given quality of cleaning grain heaps from large impurities and fine dust. The mobile grain cleaning device comprises an air-cleaning grain cleaner on a mesh conveyor, a scraper conveyor for loading grain heaps, a scraper conveyor for unloading purified grain material, a cyclone and a grain thrower. Under the upper branch of the mesh conveyor, beaters are installed, each of which is made in the form of three pushers rigidly mounted on the drive shaft and spaced evenly around the circumference in one plane, and rollers made with the possibility of contact with the mesh are installed at the ends of the pushers. 4 ill.

Description

The utility model relates to agricultural machinery, namely to mobile grain cleaning machines for cleaning grain heaps from impurities.

A mobile grain cleaning device comprising a platform mounted on a chassis platform, a loader, a grain thrower and a two-stage grain cleaner including cleaning using a mesh conveyor and air flow is known (utility model description to patent RU 152871 U1 IPC A01F 12/44 (2006.01), published: 20.06 .2015).

A mobile grain cleaning device is known, consisting of feeder scrapers, a lower feed conveyor head, central sieves of welded bar stocks — interchangeable; hopper for collecting and discharging large impurities, side welded bar sieves - removable, a waste container, a diametrical fan, a throttle valve, a receiver, an unloading conveyor, a trimmer block with an adjustable discharge pipe, a cyclone, and a frequency converter (utility model for patent RU 165 084 U1, IPC V07B 4/08 (2006.01), published: 10/10/2016, prototype).

In the known device, the introduction of a cyclone in the composition of the grain cleaning device allows for additional cleaning of the grain material from fine dust at the outlet.

To maintain the specified quality of the separation of the grain heap, it is necessary to clean the screening unit. Without cleaning, particles of large impurities get stuck in the sieve holes. This gradually leads to a decrease in the number of passes, and, with an increase in the specific load, the clogging intensity increases.

In known mobile grain cleaning devices, screening units are not provided for cleaning. This leads to a decrease in the productivity of a unit of the surface area of the screening unit and the productivity of the grain cleaning device as a whole.

The objective of the utility model is to improve the known device.

The technical result of the utility model is to increase the productivity of a mobile grain cleaning device for a given quality of cleaning grain heaps from large impurities and fine dust.

The technical result is achieved in that in a mobile grain cleaning device including an air-cleaning grain cleaner on a screening unit, a scraper conveyor for loading grain heaps, a scraper conveyor for unloading cleaned grain material, a cyclone and a grain thrower, a screening unit made in the form of a mesh conveyor, under the upper branch of which there is a padder , each of which is made in the form of three pushers, rigidly mounted on the drive shaft, and uniformly spaced around the circumference in one plane and the rollers mounted on the ends of pushers configured to contact with the conveyer net.

In FIG. 1 shows a general view of a mobile grain cleaning device; in FIG. 2 - screening unit of the grain cleaner; in FIG. 3, FIG. 4 is a diagram of the position of the rollers of the pushers of the beaters relative to the mesh of the screening unit during operation.

The mobile grain cleaning device consists of an air-cleaning grain cleaner 1 on a screening unit, a scraper conveyor 2 loading a heap of grain into a grain cleaner 1, a scraper conveyor 3 for unloading the cleaned grain material from a grain cleaner 1, cyclone 4 connected by a nozzle to a top cover (not shown) of the conveyor 3, a grain meter 5, which are mounted and secured to the chassis frame.

The scraper conveyor 2 loading the grain heap and the scraper conveyor 3 unloading the grain heap can contain from one to three chains.

The screening unit of the grain cleaner 1 is made in the form of a mesh conveyor 6, under the upper branch of which the beaters 7 are installed, each of which is made in the form of three pushers 8, rigidly mounted on the drive shaft 9. The pushers 8 are uniformly spaced around the circumference in the same plane. At the ends of the pushers mounted rubber rollers 10, made with the possibility of rotation in the plane of the pushers and contact with the grid of the conveyor 6.

The possibility of contact of the rollers 10 with the conveyor grid 6 is provided by the execution of the pusher 8 with the roller 10 of length L exceeding the distance R from the axis of the drive shaft 9 to the inner surface of the upper branch of the conveyor grid 6 by the amount of deflection specified when shaking the latter (Fig. 4).

Mobile grain cleaning device operates as follows.

The grain heap from the pile is moved by feeder scrapers (not shown) to the loading conveyor 2. The scrapers of the conveyor 2 capture the grain heap and along the inclined tubular chute through the discharge tray serves in the grain cleaner 1 on the mesh conveyor 6.

The grain heap moving along the conveyor 6 grid is periodically shaken at the contact of the roller 10 of the pusher 8 of the beaters 7. The frequency of shaking (mesh vibrations) depends on the angular speed of rotation of the drive shaft 9. The amplitude of shaking (deflection of the grid up) will be determined by the difference value (L-R).

When shaking, the layer of grain heap loosens. Favorable conditions are created for the separation of impurities and grain material, clogging of the mesh with coarse impurities is prevented.

From the grain heap, when transporting it along the upper branch of the conveyor grid 6, the grain material with small impurities wakes up in an aspiration channel (not shown), in which impurities are picked up by a stream of air and sent to the sedimentation chamber with subsequent withdrawal from grain cleaner 1. Large impurities remain on the grid and upon reaching the last upper point go into the waste channel (not shown) with the output from the grain cleaner 1.

Having freed itself from large and small weedy impurities, the grain enters the receiver of the scraper conveyor 3, the scraper of which then goes along the tubular chute to the discharge tray for feeding grain material to the receiving tray of the trimmer block of the grain thrower 5. In the upper part of the chute of the scraper conveyor 3, the grain material undergoes additional cleaning from fine dust cyclone 4.

Entering the endless belt of the trimmer of the grain thrower 5, the cleaned grain material is sent by means of an unloading pipe to the desired storage or loading place.

Claims (1)

A mobile grain-cleaning device, including an air-cleaning grain cleaner on a screening unit, a scraper conveyor for loading grain heaps, a scraper conveyor for unloading cleaned grain material, a cyclone and a grain thrower, characterized in that the screening unit is made in the form of a mesh conveyor, each of which has beaters underneath its upper branch which are made in the form of three pushers rigidly mounted on the drive shaft and spaced evenly around the circumference in the same plane, and at the ends of pushers mounted rollers made with the possibility of contact with the conveyor grid.

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