FIELD: mechanical engineering.
SUBSTANCE: invention relates to devices for preventing wheel slippage. A device for spreading granular material, in particular for spreading sand into the gap between the rail and the wheel of a rail vehicle, contains a housing, an inlet for granular material and an outlet for granular material, an axially movable metering piston with multiple holes, a compressed air supply connector (11) leading to a high-pressure chamber, a transport air chamber separated from the high-pressure chamber and containing a compressed air supply connector (13). The compressed air supply connector (11) is adapted to actuate the metering piston with compressed air for the purpose of dosing the granular material. In this case, a set of holes in the metering piston is adapted to connect the transport air chamber to the outlet for the granular material so that the granular material can be transported to the outlet using compressed air, regardless of the dosing process.
EFFECT: increased efficiency of the device for spreading sand.
20 cl, 7 dwg
