The invention belongs to the field of
underwater cold
cutting, and particularly relates to an
underwater ventilation cavity assisted high-pressure
water jet cutting device. A high-pressure water tank,a high-pressure water pump, an energy accumulator, a pressure regulating valve, a flowmeter, a
water pipe connector, a water cutter generator and a ruby
nozzle are sequentially connected through a high-pressure
water pipe; water in the high-pressure water tank forms a high-speed
water jet flow at the ruby
nozzle through the high-pressure
water pipe;
grinding sand is located on a water cutter
numerical control guide rail installation frame and is connected with the water
pipe connector through a
grinding sand conveying
pipe and a
grinding and mixing
pipe sequentially; a high-pressure
gas cylinder, a
gas pressure regulating valve, a gas flowmeter, a gas pipe, a gas cavity and an
air bubble are sequentially connected through a pipeline; gas and the high-speed
water jet flow are ejected ontoa workpiece to be
cut so as to
cut the workpiece; and the
air bubble packs the
jet flow at the position close to an outlet. According to the
underwater ventilation cavity assisted high-pressure waterjet
cutting device provided by the invention, the workpiece cannot be locally heated so as to be prevented from being deformed, no molten slags and
chemical reaction is generated to cause toxic substances, the cutting accuracy is high, the cutting surfaces are in order, and the equipment performance and the service life are improved.