Principle of Water-cooled Cable for Medium Frequency Furnace

Principle of Water-cooled Cable for Medium Frequency Furnace

The medium frequency furnace is a high-efficiency, high-strength, high-quality smelting and heating equipment, which is widely used in steel, non-ferrous metals, casting, machinery, chemical industry, electronics, and other industries. Among them, water-cooled cable is one of the core components of the medium-frequency furnace. Let's take a look at its principles.

Structure of water-cooled cable 

The water-cooled cable consists of four parts: inner conductor, insulator, metal sheath, and cooling water channel.

1. The inner conductor is the part of the cable that transmits electrical energy;

2. The insulator ensures the insulation safety of the cable;

3. The role of the metal sheath is to protect the insulator and inner conductor, and also plays a grounding role;

4. The cooling water channel is to flow water into the metal sheath to play its cooling role.

Working principle of water-cooled cable

The high-frequency electric field in the medium-frequency furnace causes the inner conductor to transmit electrical energy and generate resistance heating. Due to the large resistance of the inner conductor, a large amount of heat will occur inside the cable, so water needs to flow through the cooling water channel for cooling. When cooling water flows through the cooling water channel, it is transferred to the inner conductor through the metal sheath and takes away the heat, thereby realizing the cooling function of the water-cooled cable.

Advantages of water-cooled cables

Compared with air-cooling and alumina ceramic cables, water-cooled cables have the following advantages:

1. Significant heat dissipation effect, which can better ensure the temperature stability of the furnace body;

2. Good cooling effect can reduce the cable temperature and increase the service life of the cable;

3. Able to withstand higher currents, improving the heating efficiency of the medium frequency furnace;

4. Less prone to safety accidents such as fire and explosion, with higher safety performance.

Maintenance of water-cooled cables

To ensure the service life and safety of the medium frequency furnace, it is necessary to regularly maintain the water-cooled cables. The specific measures mainly include the following points:

• Regularly check the flow rate and temperature of the cooling water to ensure the cooling effect of the water-cooled cable;

• Check the condition of the inner conductor and pay attention to whether it is oxidized or burned;

• Check whether the metal sheath is damaged, broken or corroded, and replace it in time if necessary;

• Regularly clean the sediment and garbage in the cooling water channel to keep it unobstructed.

In summary, the water-cooled cable is an important part of the medium frequency furnace, with significant advantages and extremely high safety performance. We need to perform regular maintenance to ensure its normal operation.

Key points for the installation of water-cooled cables

Correct installation of water-cooled cables is crucial to the normal operation of the medium-frequency furnace. Here are some installation points:

1. Follow the safe operating procedures to ensure the personal safety of the operator.

2. Apply conductive lubricant to the connection port of the water-cooled cable and the furnace body, which is conducive to the connection and removal of the cable and can also reduce the chance of cable damage.

3. When connecting the furnace body and the water-cooled cable, you need to wait for at least 10 minutes for the cable to fully cool before connecting the furnace body and the cable. Similarly, before removing the connection between the cable and the furnace body, you also need to wait for enough time to ensure that the cable cools from the hot state to the operable state.

4. Check whether the water-saving link is installed correctly to ensure the stability of water flow and pressure 

5. After completion, check whether the connection point is firm and the silt condition of the furnace waterway.

Conclusion

In short, as an indispensable part of the medium frequency furnace, the water-cooled cable has significant principles and advantages. For the efficient transformation of the medium frequency furnace and improving production efficiency, the water-cooled cable is an indispensable choice. During use, we need to pay attention to maintenance work, and also pay attention to the key points of installation and connection to ensure the normal operation of the medium frequency furnace and water-cooled cable.