| 摘要 |
A knockout device (10) for removing a taphole sleeve (22) from a furnace wall (24). The device (10) is comprised of a pneumatic hammer (50) having an elongated body (52) and a weight (54) reciprocally movable by air pressure along the body (52). The body (52) has a first end (52a) with an air inlet for receiving air under pressure from an external source and a second end (52b). A metal block (62) is attached to the second end (52b) of the body (52). The block (62) has a planar surface dimensioned to rest upon an upper end of a taphole sleeve (22). A locating pin (68) extends from the block (62). The pin (68) is dimensioned to be received within an axial bore defined by the taphole sleeve (22). A housing (86) surrounds the hammer (50) and defines a cavity therearound. The housing (86) has openings therethrough to allow air from the hammer (50) to vent from the cavity.
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