Processing method of blast furnace furnace jacket upper inclined hole

Abstract

The invention discloses a processing method of an inclined hole on a blast furnace casing, and the processing method comprises the following steps that: a datum line for assembling the furnace casing and a projection line for a water tube on an assembling platform are drawn, and a straight drift eye is processed on a suitable position; a splicing operation of the furnace casing is performed; lines are drawn to show out the expanding shape of the inclined hole on the outer wall of the furnace casing; each inclined hole is marked on the outer wall of the furnace casing through the straight drift eye; a steel tube drill bush for a shoulder hole is made; the steel tube drill bush produced which keeps consistent with the inclined hole sample of the outer wall of the furnace casing according to the intersecting die then is welded on the corresponding position of the outer wall of the furnace casing; according to the projection line and the datum line for the cooling water tube drawn in step 1, the horizontal location of a tapping machine is fixed; a sliding bearing is made according to the size of the steel tube drill bush and the cog cutter of the tapping machine; the cog cutter of the tapping machine is threaded into the sliding bearing and then arranged into the steel tube drill bush, and then the sliding bearing is fixed with the steel tube drill bush or the furnace casing; the tapping machine is connected, started, and operated to finish the processing of an inclined hole.

Description

technical field [0001] The invention relates to a processing method for an inclined hole, in particular to a processing method for drilling an inclined hole on a blast furnace shell. Background technique [0002] Usually, the diameter of the water inlet and outlet pipe holes on the surface of the blast furnace shell of a steel plant is mostly in the range of φ80~φ130mm. As shown in Figure 1, the water pipes are all arranged horizontally and parallel to the center line in the horizontal direction shown in Figure 1, resulting in The surface of the furnace shell 1 is not perpendicular to the center line of the hole. According to the different positions of each hole relative to the surface of the furnace shell 1, the center line of each hole and the surface of the furnace shell 1 form an included angle ranging from 15° to 89°. Slanted holes in blast furnace shells are generally made after the installation and acceptance of the on-site furnace shells is qualified, and then the ve...

AI Technical Summary

Problems solved by technology

The oblique holes in the blast furnace shell are generally opened after the installation and acceptance of the furnace shell on site, and then the vertical furnace shell is drilled horizontally by manual gas cutting. Due to the constraints of construction conditions and human factors, the quality of the opening cannot be guaranteed.

And right now is the peak period of blast furnace installation and construction, and the above-mentioned on-site furnace shell opening speed is slow, so it will seriously affect other professional operations and construction

The furnace shell is factory-made with super-long oblique holes. When opening holes on site, it can only be cut according to the vertical hole. After the cutting is completed, it can be repaired. The strength of the overall blast furnace is greatly damaged

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