Global Patent Index - EP 0519397 A1

EP 0519397 A1 19921223 - Tap hole drilling machine.

Title (en)

Tap hole drilling machine.

Title (de)

Stichlochbohrmaschine.

Title (fr)

Machine de forage de trou de coulée.

Publication

EP 0519397 A1 19921223 (EN)

Application

EP 92110142 A 19920616

Priority

  • JP 7849991 U 19910927
  • JP 9590491 U 19911028
  • JP 9771991 U 19911101
  • JP 17034491 A 19910617

Abstract (en)

In a tap hole drilling machine which comprises a tap hole drilling machine body for drilling a tap hole (5) at a blast furnace wall by giving impacts and revolutions to a drill rod (1) supported by a drifter (2) while advancing the drifter (2) along a guide channel (6) through a chain (8) linked to a feed motor (7) provided at the rear end of the guide channel (6), and a unit for retreating the tap hole drilling machine, which supports the tap hole drilling machine body and moves the body between a drilling position and a retreat position, the drifter is an oil hydraulic drifter that produces at least any of the impacts, revolutions and reversed impacts by oil hydraulic driving. Preferably a unit (50) for restricting and supporting the drill rod in a freely restriction-releasable state is provided at the tip end of the guide channel (6) besides a drill rod support (3). Power and the restriction force on the drill rod can be increased, thermal deformation of guide channel (6) can be prevented and the tap hole centering can be ensured. <IMAGE>

IPC 1-7

C21B 7/12; E21B 44/00

IPC 8 full level

C21B 7/12 (2006.01)

CPC (source: EP KR)

C21B 7/12 (2013.01 - EP KR)

Citation (search report)

Designated contracting state (EPC)

ES FR GB IT NL

DOCDB simple family (publication)

EP 0519397 A1 19921223; EP 0519397 B1 19961009; ES 2091979 T3 19961116; KR 930000692 A 19930115; KR 950001904 B1 19950306

DOCDB simple family (application)

EP 92110142 A 19920616; ES 92110142 T 19920616; KR 920010447 A 19920616