CPC E21B 43/26 (2013.01) [E21B 7/15 (2013.01)] | 8 Claims |
1. A microwave drill bit capable of achieving fracturing of a borehole wall and end of a deep hard rock while drilling, comprising a microwave drill bit body,
wherein a support frame front plate, a metal sleeve and a water inlet ring sequentially sleeve on the microwave drill bit body from back to front;
an outer wall of the metal sleeve is connected with a transmission gear of a rotary drive I mounted on the support frame front plate by a gear ferrule, and the metal sleeve is in contact with an end surface of the support frame front plate by a rolling steel ball;
a rear end of the microwave drill bit body is connected with a microwave mode converter and a microwave splitter II respectively, and the microwave mode converter is connected with a microwave output end I of a microwave splitter I by a rectangular waveguide;
the microwave mode converter enables microwaves to be transmitted from the rectangular waveguide to a rigid coaxial waveguide;
the microwave splitter II is connected with a microwave output end II of the microwave splitter I by the rectangular waveguide;
a microwave input end I of the microwave splitter I is connected with one end of a microwave rotating joint, and another end of the microwave rotating joint is connected with one end of a fixed waveguide;
another end of the fixed waveguide is connected with a microwave generator mounted on an equipment moving platform, and the microwave rotating joint is located in a through hole in a top of a support frame rear plate, and rotates in the through hole of the support frame rear plate;
an outer wall of the microwave rotating joint is connected with a transmission gear of a rotary drive II mounted on the support frame rear plate by a gear ferrule, and the microwave rotating joint achieves a lossless rotational transmission of the microwaves from the fixed waveguide under a self-rotation condition;
a bottom end of the support frame front plate and a bottom end of the support frame rear plate are fixedly mounted on the equipment moving platform, and the equipment moving platform is mounted on a fixing base by directional sliding rails;
the fixing base is fixed to a ground by screws, and a reaction support seat is fixedly mounted on a right side of an upper surface of the fixing base;
the support frame front plate is hingedly connected with the reaction support seat by two heading drives, and the heading drives penetrate through the support frame rear plate;
the two heading drives are arranged symmetrically by taking the rigid coaxial waveguide as a center; and
the support frame front plate is pushed forward by the heading drives through a reaction support of the reaction support seat, thereby driving the rigid coaxial waveguide to drill forward, and driving structures on the equipment moving platform to synchronously move forward.
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