Spray waste concrete recovery device

The invention discloses a spray waste concrete recovery device. An oil injection device comprises an oil inlet vertical pipe, an oil injection device cover surface, six oil injection rods and an oil injection device fixing cylinder ring; the oil injection device cover surface is of a structure in a shape of a circular truncated cone which is hollow and opened at the bottom, the oil inlet verticalpipe is directly arranged above the oil injection device cover surface, the bottom end of the oil inlet vertical pipe is inserted into the fuel injection device cover surface, and the top end of the oil inlet vertical pipe is connected with an oil guiding pipe on a lubricating oil filling device in a penetrating mode; the oil injection rods are located in the oil injection device cover surface, the adjacent oil injection rods are angularly distributed with the oil inlet vertical pipe as a central axis and the angle is 60 degrees, the oil injection rods are connected with the oil inlet verticalpipe through oil separati