In the process of aluminum high-speed rolling, due to the changes of ambient temperature and rolling passes, the temperature of rolling oil of nm500 wear-resistant steel plate will change, and because the oil temperature in the oil tank is generally heated to higher than the oil temperature during rolling, in order to meet the production process requirements, the cooling and injection system is added with temperature control system to control the temperature.
the system is mainly composed of cooler, temperature regulator, thermal resistance valve, electric valve positioner, etc. The nm500 wear-resistant steel plate rolling oil reduces the oil temperature through cooler I, and the reduced amplitude is adjusted by controlling the flow of cooling water by regulating valve 5.
after the temperature regulator 2 converts the set oil temperature into an electrical signal and compares it with the electrical signal detected by the thermal resistance 3, the nm500 wear-resistant steel plate rolling outputs an electrical signal to the signal converter a of the telegraph valve positioner and converts it into an electromagnetic force to move the nozzle baffle B, change the back pressure of the nozzle C and change the air pressure output by the relay D, which acts on the regulating valve 5, Change the opening of the regulating valve (i.e. realize the change of cooling water flow Q ') and swing the feedback rod E. when the reaction force generated by the feedback spring G is balanced with the electromagnetic force, the opening of the regulating valve will not change, so as to realize the control of cooling water flow P and control the oil temperature at the set value.
