High-pressure water jet drill bit capable of punching and cutting by switching of water pressure

[0012] Such as figure 1 , 2 As shown, a high-pressure water jet drill bit capable of hydraulically switching punching and slotting includes a housing 2 and a nozzle 6 connected to the top of the housing. A drill core 3, a return spring 4, and a pressure regulating valve 5 are sequentially installed in the inner cavity of the housing. The drill core 3 is a stepped shaft structure with three different diameters. The shaft section with a large diameter is slidingly fitted with the inner cavity of the casing 2, and a diversion channel 10 and a vertical diversion hole 11 are arranged along the axis. The inner hole of the pressure regulating valve 5 is slidingly fitted, the return spring 4 is set in the middle section of the step shaft, the housing 2 is provided with a horizontal diversion channel 9 and a vertical diversion channel 12, and the tail of the housing 2 is installed with a positioning guide hole 14 Indenter 1.

[0013] The diameter of the guide hole 14 of the position...