Control Method of Induction Furnace Water Temperature Constant Automatic Control System

Abstract

The invention discloses an induction furnace water temperature constant automatic control system comprising an induction furnace body which has a hollow cylindrical structure comprising an internal cylinder and an external cylinder. A bar-delivering device is fixed at the side surface of the external cylinder. A clamping disc is fixedly installed on the bar-delivering device. The clamping disc is arranged exactly above the induction furnace body. The side surface of the top part of the external cylinder is communicated with a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are respectively provided with a valve A and a valve B. The system also comprises a heater, a temperature sensor, a liquid flow meter and a photosensitive sensor. Besides, the valve A and the valve B are connected with a PLC controller. The invention also discloses a control method of the induction furnace water temperature constant automatic control system. With combined action of the heater, a temperature controller, the PCL controller, the temperature sensor, the liquid flow meter and the pipeline transmitting valves, the objective of induction furnace water temperature constant automatic control is realized so that the structure is simple, the technology is table, lagging is reduced and the effect is obvious, and thus the induction furnace water temperature constant automatic control system is beneficial for wide-range popularization and use in the optical fiber manufacturing industry.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to an automatic control system and method for constant water temperature of an induction furnace. Background technique [0002] Temperature control systems are widely used in industrial manufacturing. In the manufacturing industry that requires induction furnace heating, the water temperature control of the induction furnace has a great impact on the process and the service life of the induction furnace. However, the heating system of the induction furnace has complex processes, variable parameters, large operating inertia, and control lag. Therefore, the induction furnace water temperature automatic control system has extremely high requirements on the temperature control regulator. [0003] In the prior art, PID control is generally used to adjust the temperature of the water circulation system. PID control has three control methods: proportional, integral and differential, and ...

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Problems solved by technology

[0004] At present, the temperature of the induction furnace during the heating process reaches thousands of degrees, and the inside of the heating furnace shell needs to be cooled by cooling water. Too large, easy to deform, long-term flow is too small, the cooling effect of the furnace shell is not good, affecting the service life of the heating furnace), generally add a cooling water flow meter in the cooling water channel to monitor the cooling water flow

But generally only the flow of water can be controlled, but the water temperature system of the water cycle cannot be automatically controlled. Therefore, we need to automatically control the water temperature of the induction furnace under the condition that the process is stable and there is no control lag.

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