Cable suspending type air partial reverse circulating motor mechanical core bit

Abstract

The invention relates to a cable suspending type air partial reverse circulating motor mechanical core bit which is characterized in that an armour cable is used for lifting and falling a drill, wherein the cable is fixed to a cable terminal joint; a sliding ring structure is arranged at the lower part of the cable terminal joint, and a pressure chamber is positioned below the sliding ring structure; a reverse twisting system is connected with the pressure chamber through a spline or threads; a speed changer is provided with a central through hole for being connected with a main shaft of the motor; an external ring of the speed changer is connected with a vacuum pump or the drill through bolts; a flake ice chamber consisting of an external pipe and an internal pipe is arranged between the vacuum pump and an ice core pipe; an air flow channel is formed on the internal pipe of the flake ice chamber; the external pipe of the flake ice chamber is a ventilating filtering net; the vacuum pump is arranged close to the upper part of the flake ice chamber; and a core bit is connected to the ice core pipe. With adoption of the cable suspending type air partial reverse circulating motor mechanical core bit, partial reverse circulating can be carried out at the bottom of a hole, so that the movement distance of the flake ice can be reduced, and the energy loss can be greatly reduced; and the cable suspending type air partial reverse circulating motor mechanical core bit is light, convenient, ingenious in design, green, environment-friendly and energy-saving.

Description

technical field [0001] The invention relates to a cable-suspended gas partial reverse circulation electromechanical core drilling tool, which is used in polar exploration, and is applied to the upper snow layer of the ice sheet and shallow (less than 500 meters) into the ice. Background technique [0002] Drilling on the Antarctic ice sheet began in the middle of the 20th century. Although the rotary machine drilling at that time could obtain a good drilling speed, the drilling equipment was relatively cumbersome. Drilling in polar regions is complicated by extremely low temperatures on the polar surface and glaciers, glacier flow, lack of roads and infrastructure, snowstorms and other harsh conditions. It is theoretically feasible to use conventional rotary drilling technology for ice core drilling. However, conventional rotary drilling has high mass and high power consumption, and is not suitable for polar drilling, so low-energy, lightweight drilling tools emerged as th...

AI Technical Summary

Problems solved by technology

Although traditional electromechanical drilling tools use an air compressor to blow compressed gas into the hole, no matter whether the gas is in positive circulation or reverse circulation, the gaps between the snow layers will also absorb most of the gas, reducing the ability to carry ice chips. Therefore it is particularly important to invent a set of novel, low-consumption, and portable cable-suspended electromechanical core drilling tools.

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