DRILL MAST Russian patent published in 2014 - IPC E21B15/00 

FIELD: mining.

SUBSTANCE: drill mast comprises a base, a crown safety frame, a shaft in the form of a truncated pyramid, comprising two longitudinal sections with a through opening between them, hinged joints and a mechanism for lifting and lowering of the mast shaft. The lower ends of the mast sections are hingedly connected to the base, and the upper ones - via the crown safety frame between themselves. Sections are made in the form of channel-shaped elements with different cross section. At least some of the shaft lining is made from elastic material and is fixed as capable of closing through openings between sections. The rear section is connected to the crown safety frame rigidly, and the front section - hingedly. Hinged joints at one side are permanently connected to the base, and at the other side - with the lower part of the front section of the shaft.

EFFECT: application of the proposed mast makes it possible to reduce costs for assembly and disassembly, to increase transportability, to reduce metal intensity and to increase safety of works.

5 dwg