DEVICE FOR PREVENTING BLAST FURNACE PRESSURE MEASURING HOLE FROM BEING CLOSED BY REFRACTORIES BY BODY PART, MOVING PART, ADJUSTMENT PART, HOLE DIAMETER EXTENSION PART AND COVER

摘要

PURPOSE: To provide a device for constructing refractories for stave protection in the state that the device is inserted into blast furnace pressure measuring hole and removing the device from the blast furnace pressure measuring hole after constructing the refractories, thereby preventing the blast furnace pressure measuring hole from being closed by refractories. CONSTITUTION: In a device for preventing the refractories injected when constructing refractories for protection of staves mounted on the inner wall of a blast furnace from being stuck to a front part of a blast furnace pressure measuring hole, the device for protecting the blast furnace pressure measuring hole comprises a body part(10) comprising a cylindrical pipe(12) fixed to the pipe with being inserted into a pipe of the blast furnace pressure measuring hole; a moving part which is constructed in such a cylindrical body(27) structure that the moving part is longitudinally movable from the inner side of the cylindrical body part, and at one side of which a plural conical surfaces(30) are formed in such a way that a plurality of guiding pins are straightly movable in guide grooves formed on the conical surfaces; an adjustment part(40) comprising an adjustment screw(45) rotatably connected to one end of the body part at the other side of the moving part, and a screw part(47) which is screw connected to one end of the adjustment screw and movably formed on the body(27); a hole diameter extension part(65) comprising adjusting plates(60) having circular arc shaped cross-section respectively fixed to the guiding pins of the moving part, and corrugated members(62) mounted between the adjusting plates so that the adjusting plates are extended in a diameter direction by movement of the guiding pins; and a flexible cover(70) for covering a front part of the hole diameter extension part.