A drilling machine for replacing air-permeable bricks in the hot state of converter bottom blowing

Abstract

The invention discloses a drilling machine for changing an air brick of a converter at a bottom blowing and thermal state. The drilling machine comprises a motor, a hollow drill bit and a coupler; the drilling machine further comprises a ball screw, a slideway and a dust cover; the motor base of the motor is connected with the slideway in a sliding manner; a nut of the ball screw is fixed on one end of the slideway; one end of the screw of the ball screw is fixedly provided with a feeding rocking wheel; the other end is axially fixed to the motor base of the motor, and relatively rotates longitudinally; and the lower end of the hollow drill bit is provided with the dust cover. According to the drilling machine for changing the air brick of the converter at the bottom blowing and thermal state, the feeding rocking wheel is arranged at the tail part of the drilling machine, so that safety loopholes during operation are eradicated; the drilling precision is effectively improved by adopting the ball screw slideway; the dust cover is additionally arranged, so that the operation and construction condition is improved, and civilized production is realized; an ordinary motor is replaced by the frequency modulation motor, so that the drilling machine can be applicable to various complicated working conditions; and a high-strength material is adopted by critical parts such as the coupler, so that the durability of the whole device is greatly improved.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment for steelmaking, in particular to a drilling machine for replacing air-permeable bricks in a converter bottom blowing hot state. Background technique [0002] In the long history of studying oxygen steelmaking, people have tried various oxygen blowing methods such as top blowing, bottom blowing, and side blowing. Finally, in 1952, the top blowing oxygen converter steelmaking method was successfully developed and became a landmark new steelmaking method. Law is developing rapidly all over the world. However, the main stirring power in the top-blown converter steelmaking method is still the boiling of carbon and oxygen, the decarburization becomes slower at the end of blowing, and the stirring strength of the molten pool is not enough. Especially as the furnace capacity increases, this shortcoming becomes more prominent. In order to solve this problem, in 1973, the Austrian Eduard beg...

AI Technical Summary

Problems solved by technology

[0006] 1. The device for controlling the feed of the drill bit by the rack transmission mechanism (feed rocker) is on the side. With the feed of the drill bit, the control personnel are constantly approaching the bottom of the hot converter, which poses a safety hazard

[0007] 2. The drilling accuracy is not high, and the drilling deviation is more than 1.5-3.0mm

[0008] 3. The ordinary motor cannot be used for frequency modulation and the drilling speed is slow

[0009] 4. The coupling is easily deformed and broken, and the drilling efficiency is low

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