An online roll gap meter with integrated chain links

Abstract

The invention discloses a chain link integrated online roll gap instrument. The roll gap instrument is connected to a dummy bar. The dummy bar includes two chains and a plurality of connecting piecesconnected between the two chains. The roll gap instrument includes an installation framework and connection shafts. A plurality of detection positions are arranged on the upper surface of the installation framework with a uniform interval. Each detection position is arranged as a rectangular through hole. Measure devices are arranged in the through holes. Connection shaft holes are arranged in thefront end and rear end of the installation framework. Connection shaft holes are also arranged in the dummy bar. The connection shaft holes in the front end and rear end of the installation frameworkand the corresponding connection shaft holes in the dummy bar are fixedly connected through the connection shafts, and so the installation framework is connected to the dummy bar. Fixed end caps areconnected to two ends of each connection shaft. The installation framework is provided with a power supply cabinet, an electric cabinet and a plurality of hoisting screw holes. The roll gap instrumentcan be freely arranged according to requirements of arranging a casting machine segment roll. The protection capability of key parts is further improved. And the roll gap instrument is free from limitation of the width of a casting machine crystallizer and interference of a rolling up guiding device.

Description

technical field [0001] The invention relates to the field of continuous casting machines, and more particularly, to an online roll gap meter with integrated chain links. Background technique [0002] The roll gap and radian of slab continuous casting are the most important precision parameters. The quality of its management directly affects the incidence of quality defects such as central cracks, segregation, triangle cracks and corner transverse cracks in the slab, and it is also the use of equipment such as sector segments. It is an important reason for the occurrence of vicious accidents such as life and stagnation. With the continuous development of continuous casting technology, a large number of technologies such as light reduction and close arrangement of segmented rolls and small rolls have been applied to modern slab continuous casting. Due to the application of these technologies, the online roll gap and arc management of the casting machine has become more and mo...

AI Technical Summary

Problems solved by technology

Due to the application of these technologies, it becomes more and more difficult to manage the online roll gap and radian of the casting machine

Among them, in the process of light reduction, in order to ensure a large gap difference between the entrance and exit of the fan section, a multi-articulated oil cylinder column is used, and there is a large random fluctuation in the column gap between the cold state and the hot state of the casting machine. There is a large and uncertain difference between the cold roll gap of the casting machine and the hot roll gap during the pouring process; and due to the application of the segmented rolls, the intermediate segmented bearings are affected by the relatively concentrated force during the pouring process. It becomes easier to sink and wear on the roll surface, which leads to the problem of uneven roll gaps on both sides and large middle roll gaps in the entire pouring channel; the problem of the roll gap between the middle segmented rolls is also the main cause of scratches on the surface of the slab reason

[0003] The traditional manual on-line roll gap measurement method can only detect a limited number of points on both sides of the casting machine, and cannot eliminate the gap between the upper and lower frames of the fan section connecting the columns, and also requires a lot of time and manpower, and manual arc alignment Also limited by time and methods, we can only check the arrangement of the outer arc rollers on the non-working surfaces on both sides of the casting machine, but cannot detect the arc in the middle of the casting machine to confirm the sinking of the outer arc roller segment bearings

[0004] In order to solve the problem of on-line roll gap and radian management of casting machines, various roll gap detectors and casting machine diagnostic instruments have been developed and applied to actual production, which has alleviated this contradiction to a certain extent, but due to their working principles and actual needs, there are still There is a certain gap, which cannot really meet the requirements of the roll gap accuracy and arc accuracy management of the slab caster

Among them, instead of the dummy head type multifunctional casting machine diagnostic instrument, there are mainly WIEGARD in Germany, SARCLAD in the UK, POWER in South Korea and Beijing Yezi in China, etc. In addition to problems such as inconvenient disassembly and use, many faults, and affecting the operation rate of the casting machine, the frequency of use is low, and it is impossible to find defects in the accuracy of the casting machine in time; at the same time, although many measuring points can be arranged for the detection of the roll gap, because The LVDT displacement sensor is used and installed at the position of the original dummy head. When detecting, the driving roller on the sector section rises and retreats, which cannot eliminate the gap between the cylinder columns of the sector section; although its arc alignment function can reproduce the two sides of the outer arc surface of the casting machine However, due to the use of segmented rollers, the abnormal condition of the bearing near the middle segment cannot be detected through the inspection of the arc, and it is impossible to judge whether the abnormality of the roll gap in the middle segment is due to the abnormality of the outer arc roller or the abnormal control of the inner arc roll gap.

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