Raise boring machine inserted tooth hob with hydraulic rock breaking function

Abstract

The invention discloses a raise boring machine inserted tooth hob with a hydraulic rock breaking function, which comprises a hob shaft, a hob shell, rock breaking inserted teeth, a waterway system anda bearing. The hob shell is fixedly connected with the hob shaft through the bearing; the rock breaking inserted teeth are arranged on the outer side wall of the hob shell; and the waterway system isarranged inner parts of the hob shaft and hob shell. An A hob shell structure form and a B hob shell structure form are designed in the hob, nozzle grooves of the A hob shell structure form and B hobshell structure form and the rock breaking inserted teeth are arranged in a staggered mode and are matched with each other, after the A hob (or the B hob) rock breaking inserted teeth are used for rolling and breaking a rock, the nozzle of the B hob (or the A hob) is used for performing hydraulic rock breaking to play a role in expanding initial cracks, and help rock blocks fall off and prevent the rock fragments from being repeatedly broken by the rock breaking inserted teeth; sprayed water can also accurately cool the rock breaking inserted teeth, and the service life of the rock breaking inserted teeth can be prolonged by more than 35%.

Description

technical field [0001] The invention relates to the technical field of drilling exploration. Specifically, it is an insert hob for a raise drilling rig with hydraulic rock breaking. Background technique [0002] At present, during the construction of the ultra-hard rock raise hole pilot hole, due to the high hardness of the rock formation, the rock-breaking efficiency is low, and the construction progress is slow. In addition, during the drilling process, the wear degree of the hob is high and the service life is low. Chinese Patent No. CN107165651A discloses a rock-breaking hob. A water jet rock-breaking device is provided on the hob seat, which can increase the expansion speed and length of the cracks produced by the hob to squeeze the rock mass, and increase the rock-breaking speed. and volume, but the water jet is not sprayed directly onto the hard rock, but onto the hob cutter ring, relying on the penetration of the hob cutter ring into the hard rock action section, du...

AI Technical Summary

Problems solved by technology

[0002] At present, during the construction of the pilot hole in the extremely hard rock, due to the high hardness of the rock formation, the efficiency of rock breaking is low, and the construction progress is slow. In addition, during the drilling process, the wear degree of the hob is high and the service life is low.

Chinese Patent No. CN107165651A discloses a rock-breaking hob. A water jet rock-breaking device is provided on the hob seat, which can increase the expansion speed and length of the cracks produced by the hob to squeeze the rock mass, and increase the rock-breaking speed. and volume, but the water jet is not sprayed directly onto the hard rock, but onto the hob cutter ring, relying on the penetration of the hob cutter ring into the hard rock action section, due to the high-speed rotation of the hob, the water jet is thrown out by centrifugal force, Therefore, the water jet used to expand the cracks in the rock mass is limited; although the injection direction of the water jet rock-breaking device and the angle between the hob cutter ring are further limited, since the water-jet rock-breaking device is a nozzle that is fixed The frame is fixed on the hob seat. We know that during the rock-breaking drilling process, there will be a lot of dust and gravel particles, which will inevitably hit the fixed frame, thereby changing the direction of the water jet and affecting the rock-breaking process. drilling effect

Chinese Patent No. CN103334764B is also equipped with high-pressure water jet equipment on the cutter head, but the high-pressure water jet equipment is all located at the excavation hob assembly of the cutter head, and is set on the edge of the cutter head, and the hob inside the cutter head. There is no setting, so the equipment can play a certain role in expanding cracks in the process of rock expansion, but in the process of rock breaking, the role of water jets in expanding cracks is gone, so improving the work efficiency of rock excavation is limited

Images