RU1799640C - Air-separating unit of grain-cleaning machine - Google Patents

Abstract

Usage: in mechanical engineering and in agricultural production, as well as in the flour and grain elevator and animal feed industry for cleaning and sorting grain. SUBSTANCE: device contains primary and secondary cleaning systems serviced by one diametrical fan. Its suction window is connected to the secondary sedimentation chamber, and the discharge pipe to air supply channels. Bypass channels are made between the sedimentary chamber of the primary cleaning system and the suction window of the fan. This reduces the pressure in the primary cleaning system. This reduces the dust content of the air. 1 ill.

Description

The invention is intended for the separation of bulk materials by air flow and can be used in agricultural production, as well as in the milling, elevator and animal feed industries for cleaning and sorting grain.

The purpose of the invention is to reduce the dustiness of the air around the primary treatment system.

The drawing shows a diagram of a pneumatic separating device.

The device consists of pneumatic separating systems of primary and secondary cleaning and a diametrical fan 1. The primary cleaning system includes an air / feed channel 2 with a valve 3 for adjusting the air speed, a pneumatic separating channel 4 with a loading device 5 and a grain output mechanism 6, sedimentary chamber 7 with a mechanism AND impurity withdrawal. The secondary cleaning system includes an air supply channel 9, a pneumatic separation channel 10 with a loading device 11, a mechanism

12 pins of refined grain and valve

13 for controlling air velocity, a sedimentation chamber 14 with a mechanism 15 for discharging broken and punctured grains and impurities. The air supply channel 9 has a window 16, and an air purifier 17 is installed between the air supply 9 and the air-collecting 1.0 channels. The device is equipped with bypass channels 18. which are connected at one end to the sedimentation chamber 7 of the primary purification system. and for others, with

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fan suction window 1. Channels 18 can be located both inside the pneumatic system and outside (see section AA).

The suction window of the fan 1 is connected to the sedimentation chamber 14 of the secondary treatment system, and the discharge pipe to the air supply channels 2 and 9.

The pneumatic separating device of the grain cleaning machine can be equipped with gratings and indent cylinders.

The device operates as follows.

The grain material to be cleaned is loaded by the charging device 5 into the pneumatic separation channel 4 of the primary purification system, in which light impurities are separated and carried away by the air flow by the supplied fan 1 to sediment chamber 7, where they are deposited and removed by the mechanism 8 outside the machine. Purified from light impurities, the air from the sedimentation chamber 7 is supplied through the bypass channels 18 to the intake screen of the fan 1.

From the pneumatic separation channel 4, the grain, purified from light impurities, is fed by a mechanism 6 to a sieve mill (not shown), after processing on which the grain mixture is loaded with the charging device 11 into the pneumatic separation channel 10 of the secondary cleaning system. In the channel 10, beaten and punctured grains are removed from the grain mixture by air flow, which enter the sedimentation chamber 14, are deposited in it and removed from it outside the machine by the mechanism 15. The cleaned grain is discharged outward by the mechanism 12, and the air purified from impurities from the sedimentary The chamber 14 enters the fan 1 and, through the air supply channel 9, is again fed into the air separation channel 10.

Part of the dusty air through the window 16 is supplied to the air cleaner 17, is cleaned therein and the cleaned air is discharged into the atmosphere.

The optimum air velocity in the air separation channels 4 and 10 is achieved by turning the valves 3 and 13.

The connection of the sedimentation chamber of the primary cleaning system with bypass channels with the suction window of the fan allows to reduce the emission of dusty air into the atmosphere in the zones of grain and impurity discharge and to reduce dustiness around the machine.

F o rmul a ieo.b rete n and

A pneumatic separating device for a grain cleaning machine, including pneumatic separating channels for primary and secondary cleaning, sedimentary chambers, air supplying channels for primary and secondary cleaning, a diametrical fan with a suction window connected to a secondary sedimentation chamber, and a discharge pipe connected (with

air supply channels, an air cleaner, loading devices located in the walls of the air separation channels, a device for removing grain and impurities, which

that, in order to reduce the dust content of the air in the primary cleaning zone, it is equipped with bypass channels connecting the primary cleaning sediment chamber with the suction window of the fan.

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