An online roll gap meter for slab continuous casting

Abstract

The invention discloses an on-line roll gap meter for slab continuous casting. The roll gap meter includes a box body, a roll gap detection mechanism, an arc detection mechanism, a horizontal position switch, a vertical position switch and a controller; For long slot and anti-arc long slot, the controller is set in the box, the horizontal and vertical position switches are set in the box and installed vertically; the roll gap detection mechanism and arc detection mechanism are set in the box, and the left and right spherical probes and anti-arc plates Stretch out the box to detect the roll gap and radian, and the angle encoder, inclination sensor and temperature sensor will transmit the detected roll gap and radian information to the controller, and the controller will transmit the corresponding data to the host computer. This roll gap meter realizes the tracking detection of the roll gap and radian state of the continuous casting machine, improves the detection accuracy, and does not require manual operation and intervention, creates conditions for the rapid adjustment of parameters such as the roll gap of the continuous casting machine, and at the same time prolongs the service life of the sector equipment , to ensure the continuous and normal production of the continuous casting machine.

Description

technical field [0001] The invention relates to the field of continuous casting machine equipment and process control, in particular to an on-line roll gap meter for slab continuous casting, which realizes roll gap detection, radian detection and management of the continuous casting machine in the continuous casting production process. Background technique [0002] The roll gap value and arc value of slab continuous casting are the two most important parameters of the continuous casting machine, which directly affect the control of quality defects such as central cracks, segregation, triangular cracks, internal cracks and corner transverse cracks in the slab. The roll gap and radian are also the main reasons for the low service life of the main equipment of the continuous casting machine such as the sector section, abnormal damage and even vicious accidents such as stagnation of the slab. However, since the casting machine is connected by a long series of segment equipment, ...

AI Technical Summary

Problems solved by technology

[0005] 1) The structure of the roll gap meter is complex, difficult to maintain and expensive

For example, the roll gap meter of WIEGARD company often leaks oil from the oil film oil pump supporting the spring plate, which causes the expansion spring that maintains the attitude of the roll gap meter to fail to expand, and the roll gap meter cannot be used; the LVDT displacement sensor used by the roll gap meter often damaged during operation

The second type of roll gap gauge using angle sensors is prone to collisions that cause deformation of the mechanical spindle, damage to the angle gauge, and seal failure, which affect the use, and the maintenance cost is expensive, often tens or millions;

[0006] 2) It is inconvenient to install and use, which affects the normal production of the continuous casting machine; testing the continuous casting machine with an alternative dummy head type roll gap meter involves a lot of manual operations, and it is necessary to replace the dummy head on the dummy bar with a roll gap meter , and then carry out cycle testing operations when not in production; before the cycle, in order to prevent damage to the internal instruments and seals of the roll gap meter, the continuous casting machine must be subjected to forced cooling for a certain period of time; when testing some continuous casting machines, in order to prevent damage to the roll The gap meter also needs to modify the main control program of the continuous casting machine; the protection, start-up, and data reception of the roll gap meter all need manual operations; generally, the continuous casting machine needs to be shut down for 2 to 3 hours for a cycle measurement. Continuous production characteristics have caused a large impact;

[0007] 3) Problems in the detection principle have seriously affected the detection accuracy of the roll gap gauges, so that these roll gap gauges can only be used as an auxiliary means for the management of the roll gap trend; since the expansion spring of the displacement sensor roll gap gauge can only eliminate the relative comparison The roller bearing gap on the fixed segment cannot eliminate the frame gap with greater variation, so today when the hydraulic segment is widely used, this type of roll gap meter can only detect the minimum cold roll gap of this continuous casting machine value, but cannot detect the "real roll gap" which is closer to the hot roll gap, but will bring a certain blind spot to the tracking and management of the continuous casting machine state

Images