High-pressure jet apparatus

A high-pressure jet apparatus, comprising:

• a nozzle head;
• a nozzle rotation shaft penetrating the nozzle head, the nozzle rotation shaft disposed in the nozzle head in a rotatable manner about a central axis, the nozzle rotation shaft including a first flow passage extending in an axial direction to penetrate the nozzle rotation axis;
• a swivel joint disposed at a proximal end of the nozzle rotation shaft, the swivel joint connected to the first flow passage;
• a spindle housing disposed on the nozzle head;
• a spindle supported by the spindle housing, the spindle connected to a distal end of the nozzle rotation shaft, the spindle rotatable integrally with the nozzle rotation shaft, the spindle including
• a flange located at a distal end of the spindle, and
• a second flow passage extending in the axial direction, the second flow passage penetrating the spindle to be connected to the first flow passage,
• a nozzle including a first nozzle outlet connected to the second flow passage, the nozzle connected to the flange;
• and
• a transmission unit configured to transmit rotation of the nozzle rotation shaft to the spindle.