Research And Development On Temperature Measuring Device In Laminar Cooling Region Of Hot Rolling

The quality of complete strip steel product greatly depends on the control of the hot-rolling temperature. Hot-rolling temperature control has always been focusing on higher temperature regulating precision, in which field, laminar cooling, as the lost process, plays a significant role. Existing temperature control methods for laminar cooling in hot-rolling mainly base on model calculating and forecasting by adjusting cooling water volumes, while the model precision draws direct effect on the final rolling temperature. Modifying the key parameters in predicting model is considered to be an effective way for higher forecasting precision. Since the strip steel on pipeline is covered by scores of centimeters cooling water, sensing surface temperature, required in model correcting, can not be carried out by regular methods. As a commission from Shanghai Baosteel Research Institute (SBRI), we are designated for developing a high precision temperature sensing device under severe laminar cooling situation.This thesis is mainly devoted to the design, simulation and experiment research of temperature measuring and artificial surroundings.The first chapter briefly introduced the devices and the process for hot-rolling strip steel, also with background, goal and significance of the project.The second chapter brought up and compared two temperature sensing method, contacting and water expelling without contact point, solving the measurement difficulties with water covering top of strip steel. An implement was designed afterwards.The third chapter set up a flow-field model for nozzle suspending system, whose CFD simulation was carried out, researching nozzle characteristics resulting from the pressure-uniforming notches, nozzle dimensions, inlet pressure and inferior border area. Also, the relationship between orifice and system dynamic performance was discussed.The forth chapter designed an artificial surroundings experiment platform for strip steel laminar cooling. High speed transportation and vibration condition was taken into account and compared, with analyzing on final implementing.The fifth chapter studied the key shaft, linking brace and pole base of experiment platform, using the finite element analyzing software, providing the intension checking and structure optimizing...