Building fire protection field

working principle

The temperature sensor located on the pipeline sends the sensed temperature to the temperature control meter in the intelligent temperature control distribution box through the signal cable. The temperature control table compares the received temperature with the set temperature, and the current temperature is greater than the set temperature. When the electric heating is not working, when the current temperature is lower than the set temperature, the electric heating starts to work. In order to avoid frequent starting, a hysteresis is generally set, and the distribution box can also be connected to the central control room or DCS system by remote communication. It can be used to observe and control the start and stop of the electric heating cable at the far end.

Construction installation

The installation of electric heating cable on the pipeline is generally carried out by straight or winding. When installing, it is fixed with heat-resistant pressure-sensitive adhesive tape at intervals of 60cm. After the installation is completed, a layer of aluminum foil is covered along the direction of the electric heating cable for increasing. The heating area of the large pipe, the power junction box and the temperature sensor are fixed on the pipe with a stainless steel belt. When the temperature of the two junction box and the three-way three-wire box is not high, the heat-resistant pressure-sensitive adhesive tape can be used for fixing, when the temperature is higher than At 200 ° C, it is generally fixed with a stainless steel belt.