Fan-shaped section opening device of slab continuous casting machine and method for dismounting pin shaft

Abstract

The invention discloses a fan-shaped section opening device of a slab continuous casting machine and a method for dismounting a pin shaft, belongs to the field of maintenance of spare parts of continuous casting machines, and aims to improve the maintenance efficiency. The fan-shaped section opening device of the slab continuous casting machine comprises a lead screw, a jacking tool used for erecting a jack and a connecting nut fixed to a pin shaft. The connecting nut is coaxially welded to the outer end face of the pin shaft. A through hole is formed in the jacking tool. The inner end of the lead screw is in threaded fit connection with the connecting nut, and the outer end of the lead screw penetrates through the through hole in the jacking tool and is movably connected with the jacking tool in the axial direction. A limiting device is arranged between the lead screw and the jacking tool, and the jacking tool is detachably connected to the lead screw through the limiting device. According to the fan-shaped section opening device of the slab continuous casting machine and the method for dismounting the pin shaft, the connection between the connecting nut and the pin shaft is more reliable; the connecting nut does not need to be taken off after overhauling, and the damage risk caused by repeated welding of the pin shaft is reduced; the lead screw is connected with the jacking tool and the connecting nut, disassembly and assembly are fast, and the jacking tool can be repeatedly used; and when the pin shaft is dismounted, the dismounting qualification rate reaches 99%, and the dismounting of one pin shaft is within 30-40 minutes, so that the maintenance efficiency is improved.

Description

technical field [0001] The invention belongs to the field of maintenance of continuous casting machine spare parts, in particular to a segment opening device of a slab continuous casting machine and a method for removing a pin shaft. Background technique [0002] The inner and outer arc dismantling of the spare parts of the slab segment is referred to as the segment opening. The conventional method of removing the pin shaft by splitting is: welding the T-shaped steel plate bracket on the connecting pin shaft. Set up a jack in the jack installation area on both sides of the shaped steel plate support, one end of the jack is against the shell of the slab continuous casting machine segment, and the other end is against the T-shaped steel plate support, and the shell of the billet continuous casting machine segment is used as the force fulcrum, push out the pin shaft. In this way, there are the following problems: [0003] One: before removing pin shaft, need blanking with st...

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