The heating system is mainly composed of a 750 KVA rectifier transformer , a 600 KW / 300 Hz intermediate frequency power supply , a capacitor cabinet and a sensor. The temperature automatic control system consists of a PLC (Siemens S 7 - 300 ), a human-machine interface touch screen and an infrared thermometer.

A , process parameters

1 . Round steel diameter: φ 133.8 — φ 185.8;             

2 . Round steel length: 105000;             

3 . The speed of the round steel passing through the preheating furnace: 0.12 - 0.3m / s;             

4 . Temperature after preheating of round steel : 100 °C ± 10 °C ;             

5 . Round steel maximum weight: 3300Kg;             

B . Overall plan for round steel heating

1. Round steel online heating equipment configuration

1. 1 bar is heated using a medium frequency power K the GPS-60 0KW /. 3 500 Hz ) ;

1. 2 one inductor heats all round steel ;

1. 3 an intermediate frequency resonant capacitor cabinet;

1. 4 water-cooled cables: for the connection of the capacitor cabinet and the sensor;

1. 5 console one: control the whole system operation;

1. 6 soft water cooling device set: used to cool the intermediate frequency power supply and capacitor cabinet;

A set of industrial water cooling systems: used to cool the sensor (user-owned).

1.7 One rectifier transformer: 10 KV on the grid side to 415 V , 50 Hz (user-supplied).

1. 8 temperature control system: including PLC , LCD display panel, infrared thermometer, application software.

1.9 In order to ensure the normal operation of the equipment, the power supply is completed by a Feng Shui cooling device.