Patent ID: 7410012

Claim:
A hydraulic automatically-pressurizing pump comprising: an intermediate fastening connector; a case; a reversing valve; a mechanically-controlled automatic direction-reversing device; a power cylinder; a pressurizing cylinder; and an ultrahigh-pressure connecting tube; wherein the reversing valve, the mechanically-controlled automatic direction-reversing device, the power cylinder, the pressurizing cylinder and the ultrahigh-pressure connecting tube are disposed in series in the case and assembled from the upper end to the lower end along a central axis of the case, a valve core of the reversing valve is connected with one end of the mechanically-controlled automatic direction-reversing device, the other end of the mechanically-controlled automatic direction-reversing device is connected with the power cylinder in the center of the case, the fastening connector is connected with the case and further connected through pressure with the reversing valve successively, the power cylinder disposed in the case is a multi-stage power cylinder, said pressurizing cylinder communicates with a two-channel drill bit through the ultrahigh-pressure connecting tube which is in the center of the case, an ultrahigh-pressure channel is provided on the wall of the pressurizing cylinder, a section of enlarged shoulder hole which is a thin-wall tube is disposed in the ultrahigh-pressure connecting tube, the reversing valve comprising a plug-in reversing valve and a pilot valve, the upper end of the plug-in reversing valve is connected with the fastening connector, the lower end of the plug-in reversing valve is connected with the upper end of the pilot valve, and a valve core in the lower end of the pilot valve is connected with the mechanically-controlled automatic direction-reversing device, a control channel of the plug-in reversing valve is connected with an outlet of the pilot valve flow channel, a main flow channel of the plug-in reversing valve communicates with the power cylinder though the pilot valve.