Dual track intermediate frequency melting furnace

The dual track intermediate frequency melting furnace is an induction heating melting equipment that uses series inverter thyristor intermediate frequency power supply technology. It can send power to two furnace bodies at the same time, one for insulation and one for melting. There is no need to use an external switching device to select the furnace body. , a set of intermediate frequency melting furnaces can be used to melt two different metal materials at the same time. The intermediate frequency melting furnace has the advantages of high efficiency, energy saving, environmental protection, and can improve melting efficiency.

1. Principle of dual track intermediate frequency melting furnace

The series resonance principle of a dual track intermediate frequency smelting furnace means that before the inverter is started, the intermediate frequency furnace power supply first triggers the inverter thyristor with an excitation signal higher than the resonant frequency of the tank circuit. When the circuit detects the DC current of the main circuit, it controls the frequency of its excitation signal to scan from high to low. When the frequency of its excitation signal drops to close to the resonant frequency of the tank circuit, the intermediate frequency voltage is established and fed back to the automatic frequency modulation circuit to control the inverter lead angle, allowing the equipment to enter steady state operation.

The entire series-connected intermediate-frequency power inverter bridge is composed of a thyristor and a fast diode to form a half-bridge inverter bridge, which realizes all rectification. When working, like a parallel inverter, the thyristor is triggered in turn so that the load receives intermediate-frequency current. The purpose of setting up the fast diode is to provide a path for the load oscillation current during the turn-off period of the thyristor.

The dual track intermediate frequency melting furnace is a one-electric two-furnace melting system composed of a series resonance dual-output power supply cabinet and two furnace bodies. The output power can be infinitely distributed between the two furnace bodies. The series resonance design of Huaxin electric furnace ensures continuous and stable operation of the equipment and has a wide load matching range. The rectifier part of the power cabinet adopts a fully open design, so the power factor is high and the high-order harmonics are small.

2. Functions of dual track intermediate frequency melting furnace:

A dual track intermediate frequency melting furnace generally consists of an intermediate frequency power supply control system, a steel shell body of the melting furnace, a hydraulic tilting furnace system, an induction heating coil and other parts. Among them, the intermediate frequency power control system is the core part of the entire melting furnace. It is responsible for controlling the operation of the entire dual track intermediate frequency melting furnace and adjusting parameters such as temperature and power. The furnace body and furnace lining are used to hold metal materials and molten metal solutions, and the electric heating element is the part used to generate heat.

The structure of the dual track intermediate frequency melting furnace is that one power supply brings two furnaces working at the same time. The power can be distributed arbitrarily. One is used for melting and the other is used for heat preservation. The melting is continuous. When necessary, heat preservation can be carried out at the accurate temperature. Heating, tempering, etc., to maximize production output. Good starting characteristics, it can start at will under full or heavy load conditions. Improve the power factor, ensuring that the power factor can reach 95% at any power. Constant power output adopts constant power output control. During the melting process of Huaxin electric furnace, when the load and temperature change, the load will always be output at full power, thus shortening the melting time. Therefore, the series inverter of the dual track intermediate frequency smelting furnace uses a half-bridge circuit. Since the number of main circuit components is relatively reduced and has a high power factor, it has higher power.

3. Precautions for using dual track intermediate frequency melting furnace:
4. Check whether all components are intact;
5. Check whether all fasteners are intact;
6. Check whether all the wiring has fallen off and whether the solder joints have desoldered;
7. Check whether the connection during installation is correct;
8. Use a multimeter to check the main circuit, the insulation of the control circuit on the chassis and the insulation between phases;
9. Check whether the control plug-in is placed correctly;
10. Open the water inlet valve, adjust the water pressure to 0.1~0.2Mpa, and check whether there are leaks in each water channel;
11. Strictly check the phase sequence. The melting furnace leads the intermediate frequency power supply phase by 120°, and the holding furnace lags the intermediate frequency power supply phase by 120°.
12. Press the power switch of the control, and the power indicator light of each control panel should light up;
13. Use an oscilloscope to check that the trigger pulses of the rectifier and inverter should be normal;
14. The protection thyristor is triggered and the corresponding protection indicator light lights up;
15. Set the power adjustment potentiometer to 0, pull out the control board, and check that the relay operates normally.
16. Characteristics of dual track intermediate frequency melting furnace:
17. High efficiency and energy saving:

The conversion efficiency of the intermediate frequency power supply of the dual track intermediate frequency melting furnace is high and the energy loss is small. Therefore, the energy consumption of the dual track intermediate frequency melting furnace is low, which can effectively reduce production costs.

2. Fast heating speed:

The heat generated by the dual track intermediate frequency melting furnace is concentrated and the heating speed is fast. It can heat the metal materials to the required temperature in a short time, improving production efficiency.

3. Temperature controllable:

The heating process of the dual track intermediate frequency melting furnace can achieve precise temperature control by adjusting the power of the intermediate frequency power supply, which is beneficial to improving product quality.

4. Good material adaptability:

Dual track intermediate frequency melting furnace is suitable for smelting, heating and melting of various metal materials, such as steel, non-ferrous metals, ceramics, etc.

5. Environmental protection and safety:

The dual track intermediate frequency melting furnace will not produce harmful gases and radioactive substances during its operation, and a variety of safety protection measures have been taken to ensure the safety of operators and environmental protection.

In short, the dual track medium frequency melting furnace is an efficient, energy-saving, and environmentally friendly melting equipment with broad application prospects and market prospects. In the future, with the continuous advancement of technology and the increasing demand for applications, the application fields and market demand of dual track intermediate frequency melting furnaces will further expand.