Drilling tool combining long spiral drill rod with down-hole hammer

Abstract

A drilling tool combining a long spiral drill rod with a down-hole hammer comprises the drill rod and a spiral blade surrounding the drill rod in a spiral mode. A down-hole hammer drill bit is arranged on the lower portion in the drill rod, and a propelling mechanism of the down-hole hammer is arranged on the upper portion in the drill rod. The propelling mechanism comprises an air cylinder, a ventilation pipe penetrates through the air cylinder and a piston longitudinally, a first air outlet used for supplying air to an air cylinder cavity between an air cylinder end cover and the piston is formed in the side wall of the ventilation pipe, a longitudinal movement track of the piston is constituted by the cylinder body inner wall of the air cylinder and the outer wall of the ventilation pipe, the bottom end of the piston is connected with an ejection rod used for ejecting the down-hole hammer, the ejection rod is connected with the upper end of a guide rod through a spring, and the guide rod is fixedly connected with the down-hole hammer after penetrating through a bottom cover of the air cylinder. The outlet end of the ventilation pipe is in airtight connection with the air inlet end of a hose, and the air outlet end of the hose is in airtight connection with an air inlet port of the down-hole hammer. Different hole forming processes can be adopted according to soil layers and rock layers different in hardness, and the drilling tool has high implementation value.

Description

technical field [0001] The invention relates to a drilling tool combined with a long helical drill rod and a down-the-hole hammer. Background technique [0002] Traditional rock-entry short piles can be roughly divided into the following construction techniques or processes: [0003] 1. A team of two is required to manually dig holes in an environment with extremely poor (or even dangerous) working conditions, and in order to meet the needs of the construction period, a large amount of labor is required; [0004] 2. Adding a large amount of water with a heavy hammer to repeatedly impact the original and inefficient impact hole-forming form of the broken rock, and in order to meet the needs of the construction period, a large amount of mechanical equipment and labor are required; [0005] 3. Add a large amount of water to repeatedly drill and grind the rock to produce a large amount of mud in the form of positive circulation hole formation, and in order to meet the needs of ...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of the existing short piles into the rock that require a large amount of mechanical equipment and labor, the present invention provides a drilling tool that combines a long auger drill rod with a down-the-hole hammer

Images