F - Mech Eng,Light,Heat,Weapons – 27 – D
Patent
F - Mech Eng,Light,Heat,Weapons
27
D
39/98
F27D 3/15 (2006.01) C21B 7/12 (2006.01)
Patent
CA 1090567
Abstract of the Disclosure The invention provides a machine for drilling tap holes for shaft furnaces, particularly of blast furnaces, wherein the machine can be moved to the working position and withdrawn therefrom in one single movement, in contrast to the two independent movements of prior art mechanisms. The apparatus therefore requires only a single driving mechanism, instead of two independent driving mechanisms. The apparatus consists of an inclined support column on which a bar carrying a drilling mechanism is mounted by means of a radial arm extend- ing from the support column. The support column is inclined at an angle to the vertical in dependence upon the space available around the furnace for movement of the radial arm and bar from a working position to a retracted position and vice versa. The bar is mounted on the arm for rotation in the vertical plane to vary the angle of inclination of the tap hole. The hydraulic driving device for moving the machine between its two positions comprises means for limiting the amplitude to which it can be extended, and for insuring that the extreme extended position which is thereby selected corresponds to the operating position of the tool holder bar in order to avoid inaccuracies in drilling. Means for maintaining the pressure of the hydraulic fluid during the operation of the drilling machine may consist of rigid jointed piping, or alternatively a flexible conduit which is mounted on a wind-up reel.
272134
Hirons & Rogers
S.a. Des Anciens Etablissements Paul Wurth
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