Replacement process of pressure gauge in blooming mill

Abstract

The invention provides a replacement process of a pressure gauge for a primary milling machine. The replacement process comprises the following detachment processes: arranging a scaffold on the side face of a press-down device; arranging a plurality of hand chain hoists on a position, close to the press-down device, of the primary milling machine; arranging a supporting and hoisting sling on a support trolley, moving the support trolley to the lower part of a pressing head, and connecting a corresponding hoisting hook of each of the hand chain hoist with a corresponding hoisting hole formed inthe supporting and hoisting sling; starting up the hand chain hoists to ensure that the supporting and hoisting sling is tightly adhered with the lower end of the pressing head; detaching an oil pipe, a telescopic cover connecting bolt and a spherical surface cushion pressing plate bolt, wherein the oil pipe, telescopic cover connecting bolts and spherical surface cushion pressing plate bolts areconnected with the pressing head; starting up the hand chain hoists to ensure that the supporting and hoisting sling is slowly landed on the support trolley and the support trolley is moved out of ato-be-overhauled area from the lower part of the press-down device; turning the pressing head over 180 degrees, detaching pressing blocks and connecting the pressing blocks with the connecting bolts arranged on the pressing head, and hoisting out the pressing blocks; and hoisting out the pressure gauge of the pressing head. According to the replacement process of the pressure gauge for the primarymilling machine disclosed by the invention, the replacement efficiency is improved, and the labor load is reduced; and by utilizing a dedicated tool, pressure gauge can be fixed, so that the construction safety is improved.

Description

technical field [0001] The invention relates to the field of blooming mill maintenance, in particular to a process for replacing a blooming mill pressure gauge. Background technique [0002] The blooming mill is a kind of mechanical equipment that extrudes the steel billet through external force and produces plastic deformation. For the roughing mill that adopts electric pressing to adjust the roll gap without load, a pressure gauge is installed between the electric pressing device on the upper part of the archway window and the bearing seat of the upper back-up roll to measure the rolling pressure; with long-term continuous high-load production, there will be The unstable signal of the pressure gauge affects the normal rolling production and needs to be replaced regularly. In the previous replacement, due to the narrow position of the pressing device of the blooming mill, it was impossible to replace the pressure measuring instrument through the conventional method of disa...

AI Technical Summary

Problems solved by technology

For the roughing mill that adopts electric pressing to adjust the roll gap without load, a pressure gauge is installed between the electric pressing device on the upper part of the archway window and the bearing seat of the upper back-up roll to measure the rolling pressure; with long-term continuous high-load production, there will be The signal of the pressure gauge is unstable, etc., which affect the normal rolling production and need to be replaced regularly

In the previous replacement, due to the narrow location of the pressing device of the blooming mill, it was impossible to replace the pressure gauge through the conventional method of disassembly and assembly, and the pressing head spherical pad assembly of the pressing device had to be dismantled as a whole.

Since the spherical pad assembly of the pressing head of the pressing device is located in the window of the archway, it cannot be hoisted directly by driving, and can only be hoisted by hand chain hoists. Therefore, bumps are often caused during the hoisting process, and the safety of the operation cannot be guaranteed.

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