Patent ID: 8336926
Filing Date: 2012-12-25
Classification: B60B,B61C

Abstract:
1. A suction nozzle insert arranged in a storage container of a sand discharge device of a rail vehicle, wherein the suction nozzle insert comprises a housing having a cover section at a top end of the housing, at least one suction channel leading in an inward direction from the storage container, a first hollow chamber, and a second hollow chamber, the first hollow chamber comprising an injection chamber and a venturi pipe and having an opening at a bottom thereof where a sand feed pipe can be connected, the at least one suction channel connecting the storage container with the injection chamber, the suction nozzle insert being configured such that an air stream supplied by a compressed-air pipe can flow through the second hollow chamber and then parallel to a longitudinal axis of the suction nozzle in succession through a nozzle, the injection chamber, and the venturi pipe towards the opening at the bottom of the first hollow chamber, the suction nozzle insert also comprising at least one air channel provided between the second hollow chamber and the first hollow chamber, the at least one air channel having an air channel inlet in the second hollow chamber and an air channel outlet in the first hollow chamber, the at least one air channel being at least partially closable.