Electric heating cable for high-speed tunnels

In modern transportation, high-speed tunnels are of great significance. They shorten driving distances, improve transportation efficiency, and bring great convenience to people's travel. However, under special climatic conditions, high-speed tunnels face many challenges, and the impact of low temperatures on tunnel structures and facilities is one of them. At this time, electric heating cable technology is introduced into high-speed tunnels and plays an important role.

Low temperature challenges faced by high-speed tunnels

High-speed tunnels are mostly located in mountainous areas or underground, and the ambient temperature is greatly affected by the external climate. In winter or cold areas, the temperature in the tunnel may drop below freezing, causing freezing of the road surface, drainage system, fire-fighting facilities, etc. This not only affects the normal passage of the tunnel, but also seriously threatens driving safety.

Frozen road surface will reduce the friction of vehicles, making them prone to slipping and loss of control, increasing the probability of traffic accidents. Frozen drainage system will prevent the water in the tunnel from being discharged in time, affecting structural safety. Frozen fire-fighting facilities will not be able to be used normally in an emergency, delaying rescue time.

Working principle and advantages of electric heating tape

Electric heating tape is a heating device that converts electrical energy into thermal energy. It is usually composed of a conductive core wire, an insulating layer, a metal shielding layer and an outer sheath. When the current passes through the conductive core wire, heat is generated due to resistance. This heat is transferred to the outer sheath through the insulating layer and the metal shielding layer, and then to the object to be heated.

The application of electric heating cables in high-speed tunnels has the following advantages: high efficiency and energy saving, high energy conversion efficiency, more energy-saving than traditional heating methods; easy installation, light weight, small size, can be directly laid on the road surface, drainage pipes, fire protection facilities and other parts; precise temperature control, can ensure the appropriate temperature of the tunnel through the temperature controller; safe and reliable, good insulation and waterproof performance, safe operation in a humid tunnel environment, no damage to the tunnel structure and facilities.

Application of electric heating cables in high-speed tunnels

1. Pavement heating

Laying electric heating cables on the pavement of high-speed tunnels can effectively prevent the road from freezing and improve driving safety. The electric heating cables can automatically adjust the heating power according to the pavement temperature to maintain the appropriate pavement temperature.

2. Drainage system heating

The drainage system in the tunnel is easily affected by low temperatures and freezes, resulting in the inability to drain the accumulated water. Installing electric heating cables in the drainage pipes can prevent freezing and ensure the smooth drainage of accumulated water.

3. Firefighting facility heating

High-speed tunnel firefighting facilities may freeze at low temperatures, affecting normal use. Installing electric heating cables can ensure the normal operation of firefighting facilities in emergency situations and improve the level of tunnel fire safety.

Installation and maintenance of electric heating cables

1. Precautions for installation

The installation of electric heating cables should be strictly carried out according to the product manual to ensure correct and firm operation. Pay attention to the wiring method to avoid incorrect wiring that may cause it to fail to work properly. Protect the electric heating cables during installation to avoid mechanical damage.

2. Maintenance

Regular maintenance is required to ensure the normal operation of the electric heating cables. Mainly check whether the appearance is damaged, whether the wiring is loose, whether the temperature controller is normal, etc. If problems are found, deal with them in time to avoid affecting the use effect.

Conclusion

As an efficient, energy-saving, safe and reliable heating device, electric heating tape has broad application prospects in high-speed tunnels. Installing electric heating tape can effectively prevent the tunnel pavement, drainage system, fire-fighting facilities, etc. from freezing due to low temperatures, and improve the tunnel's traffic safety and fire safety level.