FIELD: transport.
SUBSTANCE: device for batching and transportation of powder and/or loose solid material in a range of low or high pressure has housing containing inlet with input valve in input area, outlet with output valve in output area and linear drive actuating piston with variable speed of forward movement respectively back. The piston is made at least partially as hollow body with internal piston space and with at least one inward hole to accept material into internal piston space and outward hole to extract material from internal piston space. The piston at driving side rests on sealing support and is sealed by it relative to atmosphere, and at nondriving side the piston rests on scraping support which seals input area from output area relative to passage of solid material. In this device, there is bypass connecting input area and output area and there are pressure reducing valve and loading valve to establish pressure in internal device space including input area and output area.
EFFECT: invention provides better batching and transportation of materials without their compaction while providing equal pressures before and behind scraper support and excluding material throw-over.
22 cl, 8 dwg
