Steel shell intermediate frequency furnace hydraulic tilt furnace
The steel shell intermediate frequency furnace needs to be poured into molten steel at the end of the smelting of scrap metal. At this time, due to the relatively large weight of the steel shell intermediate frequency furnace and the weight of the molten steel in the intermediate frequency furnace, the previous method of dumping the reducer to the furnace body to the molten steel is safe. , the reliability is more embarrassing and dangerous. Therefore, the intermediate frequency furnace adopts the steel shell as the furnace body, and generally adopts the hydraulic tilting furnace method.
1. Control of hydraulic tilting furnace of steel shell intermediate frequency furnace:
The control of the hydraulic system of the steel shell intermediate frequency furnace adopts a series of valves such as overflow valve, throttle valve and explosion-proof valve to control the hydraulic system.
A. Throttle valve: Rotate clockwise to increase the flow, and vice versa to decrease the flow.
B. Relief valve: Rotate clockwise to increase the pressure, and vice versa to decrease the pressure. The relief valve plays the role of pressure adjustment and safety in the system. The system pressure should be determined according to the regulations, and the overload setting is not allowed. The electromagnetic relief valve does not allow the load to start at the same time as the motor. Only after the motor runs normally and the system is working, the solenoid valve of the electromagnetic relief valve can be energized to work.
C. Reversing valve: It plays the role of changing the direction of hydraulic oil in the hydraulic system, and is divided into manual reversing valve and electromagnetic reversing valve. When not working, the valve core is always in the middle position, the electromagnet in the solenoid valve must be connected according to the system requirements, and the solenoid valve and valve body are not allowed to be disassembled.
2. Oil supply for hydraulic tilt furnace of steel shell intermediate frequency furnace:
Generally speaking, 36# hydraulic oil is used for hydraulic tilting furnace frying in steel shell intermediate frequency furnace. At this time, we should pay attention to:
A. The rotation direction of the hydraulic oil pump is not allowed to be reversed (rotate in the direction of the oil pump, that is, the direction of the arrow). The start of the oil pump motor does not allow the load to start. The oil pump is strictly prohibited to run without oil. The motor should be jogged several times before continuous operation. B. The hydraulic oil must be clean and no sand and impurities are allowed. The hydraulic oil must be filtered into the oil tank.
3. Hydraulic cylinder of hydraulic tilting furnace of steel shell intermediate frequency furnace:
In the hydraulic system of the steel shell intermediate frequency furnace, the hydraulic cylinder acts as an actuator, and the piston rod of the hydraulic cylinder should ensure that no bumps are allowed.
4. Debugging of hydraulic tilt furnace of steel shell intermediate frequency furnace:
First of all, the hydraulic oil in the oil tank of the steel shell intermediate frequency furnace must be higher than the upper end of the liquid level gauge. Before turning on the motor, the power switch should be jogged 2 to 3 times to determine whether the rotation direction is correct, and then it can be started continuously. The oil pump should run for 10 minutes without load, and the pressure should be gradually adjusted:
A. Set the pressure to 1Mpa (1Kg/cm2) and turn the control valve to make the actuator (hydraulic cylinder) work reciprocatingly several times. When the hydraulic cylinder enters normal operation (no creeping phenomenon), go to the next step.
B. Set the pressure to the working pressure specified by the system, turn the control valve, adjust the throttle valve, and make the hydraulic system enter the normal state.
C. Check that the hydraulic oil in the oil tank of the steel shell intermediate frequency furnace is at the upper end of the level gauge. If it is lower than the lower end of the tuck position, hydraulic oil should be added to the upper end of the level gauge in time.