METHOD FOR MACHINING ESSENTIALLY STONE PITCHING OF BUILDINGS AND DEVICE FOR PRODUCING A WORKING MEDIUM USED FOR CARRYING OUT SAID METHOD AND EMBODIED IN THE FORM OF A SUPERSONIC JET OF HOT GASES

摘要

The invention can be used in the building industry. The inventive method for machining essentially stone pitching of buildings consists in a continuous injection of solid particles of a working medium into a transporting stream of compressed air, whereby a suspended matter is formed. Said suspended matter is supplied to a working member embodied in the form of a checker-nozzle and undergoes therein the action of an ancillary stream of the working medium embodied in the form of a supersonic jet of residual combustion gases. The hot gaseous working medium warms up and expands air in the suspended matter and simultaneously transfers kinematic energy to the suspended solid particles thereof. As a result of the overtemperature of the working medium with respect to the suspended matter, the speed and pressure inside the checker-nozzle increases hundreds of times and initiates the supersonic speed of a discharge escape. The inventive device for producing the supersonic jet comprises a body embraced by a shell forming a cooling housing. Said housing is connected to the compressed air supply with the aid of a turbulence nozzle and linked to a combustion chamber.