Drilling and punching integrated hydraulic drill bit
The invention discloses a drilling and punching integrated hydraulic drill bit which comprises a drill bit body. A through hole, extending axially, penetrates the whole drill bit body and comprises a nozzle hole portion in the front and a valve hole portion in the middle. The back end of the nozzle hole is designed into a conical surface, and a reversing valve is arranged in the valve hole portion and comprises a protrusion block and a spring. The protrusion block is provided with a connection hole extending axially and a side hole communicated with the connection hole, the front end of the connection hole is blind, the front end of the protrusion block is designed into a conical surface which is in fitting seal with the conical surface of the back end of the nozzle hole portion. The drill bit body is further provided with a side nozzle hole, and an inner end port of the side nozzle hole leads to a big hole of the valve hole portion while an outer end port of the side nozzle hole leads to the surface of the outer ring of the drill bit body. The drilling and punching integrated hydraulic drill bit overcomes defects of existing hydraulic punching devices. Drilling and punching integration is realized by the aid of the automatic reversing valve. Secondary breaking of big cinders is realized by the aid of secondary breaking tools arranged reasonably, so that blocking of discharging passages due to falling of the big cinders is avoided. 1. A drilling-punching integrated hydraulic punching drill bit, which comprises a bit body, characterized in that through the whole drill bit body is provided with axially extending through hole, the through-hole includes a nozzle hole and the front section of the middle section of the part of the hole part of the valve body, part of the rear end port of the nozzle hole is a tapered opening, located in a hole portion of the valve body and the hole on the front side, the rear side of the large stepped hole is located, a hole portion of the valve body is provided with the reversing valve, the reversing valve comprises a convex block and the spring, a convex block is by the jacking block, and the bottom block protruding from the front to the rear and a concentrically arranged, top block, the end of the projection and the cylinder block, and the front end of the block to the surface of the outer ring part with nozzle hole is adapted to the conical surface of the port, the diameter is smaller than the diameter of the top block and the top block are the diameter is smaller than the diameter of the small hole, the diameter of the raised diameter is smaller than the bottom block, a bottom block of the valve body hole and the surface of the outer ring part of the large-hole-wall is attached, with the surface of the outer ring of the valve body hole is adhered to part of the aperture wall, a convex block is provided with a axially extending connecting hole and is communicated with the connecting hole of the radially extending, connecting hole plugging in the front end, the rear end of the blind hole of the opening, on the block side, side-hole port is located on the surface of the outer ring of the top block, the spring surrounds the protruding convex block of the outer ring, and the spring clip is arranged in the valve body hole of the convex block part of the surface between the bottom block; drill bit body is also provided with a side nozzle hole, the side of the nozzle hole to the side port of the valve body hole in part of the macroporous, the outer port surface of the outer ring to the drill bit body of the; drill bit body is provided with the baffle in the convex block positioning baffle ring for the rear side of; when the reversing valve is located at the initial state, the front end of the convex block with nozzle hole is part of a gap is arranged between the rear end of the, convex block of the bottom block plugging side surface of the outer ring of the nozzle hole side port in; when the reversing valve is located in the reversing state, a convex block to move forward, the spring is in the compressed state, the above-mentioned block conical surface of the front end of the plug conical opening part of the nozzle hole, in the side of the nozzle hole with the side port is communicated with the body bore part of the hole. 2. The advantages of drilling-punching integrated hydraulic punching bit according to Claim 1, characterized in that the through hole also located on the rear section of the expanding part, the expanding part of the rear side of the conical threaded hole of the extension. 3. Drilling-punching integrated hydraulic punching bit according to Claim 1 or 2, characterized in that side of the oblique line-shaped extending nozzle holes, in the side of the nozzle hole side port is located on the rear side of its outer port. 4. Drilling-punching integrated hydraulic punching bit according to Claim 3, characterized in that the front end of the bit body of a hole portion corresponding to the nozzle a central nozzle is mounted axially, the outer surface of the corresponding side of the drill bit on the outer side of the nozzle hole of the nozzle is provided with a lateral port. 5. Drilling-punching integrated hydraulic punching bit according to Claim 4, characterized in that side of the periphery of the nozzle holes are evenly arranged on the bit body, each side of the drill body of the back side of the nozzle surface of the outer ring side are arranged on the blade. 6. Drilling-punching integrated hydraulic punching bit according to Claim 5, characterized in that the through hole is located on the central axis of the bit body.