In winter, especially in the cold northern regions, the magnetic flap level gauge usually needs heat tracing and heat insulation in practical applications to prevent the liquid in the tube from freezing and ensure the normal operation of the instrument. As the electric heat tracing system has the advantages of simple structure, convenient use, high thermal efficiency, safety and reliability, no environmental pollution, long service life, and low maintenance workload, electric heat tracing technology has been widely used. It is a kind of advanced heat tracing system. It usually uses electric heat tracing tape to heat the surface of the pipeline to heat the heat, so as to ensure that the liquid medium works under a certain temperature, so that the liquid level measurement of the easily solidified and highly viscous liquid medium can be performed normally. It is gradually replacing steam, hot water and other traditional insulation methods.
In fact, the normal operation of the electric heating cable depends not only on the scientific and rationality of the product quality and the selection and design, but also on the correct installation of the product. Below, we will focus on the installation process of the lower magnetic level gauge electric heating cable.
The magnetic flap level gauge has a single electrical heating zone and multiple electrical heating zones. The installation method of the electrical heating zone is generally divided into spiral winding and parallel installation. The buoy of the magnetic flip level gauge is bundled with a magnetic flip piece and a display panel assembly. The magnetic flip piece is flipped by the magnetic coupling effect of the magnetic float in the float. In order to prevent the display panel from being away from the float, the flipping of the magnetic flip piece is affected. The magnetic heat tracer for magnetic level gauges generally uses self-controlled temperature and heat tracing cables, and is constructed using parallel laying and multiple electrical cables in a manner that avoids the effect of heat tracing and avoids the display panel for installation.
During the construction operation, the cable is routed from the end of the pontoon to the end of the pontoon and then laid back parallel to the starting point. The distance between each cable is not less than 2 times the bandwidth. The installation should be minimized and the bending radius should be not Less than 5 times the thickness of the tropical heat, generally every 50cm will be with a tropical glass fiber pressure sensitive tape or aluminum foil tape fixed to the trunk, so that the electric heating belt and the buoy tightly, to improve the thermal conductivity; is strictly prohibited using wire or plastic wire Banding. One end of the cables that connect to the heat cables is connected to the power box, and the tail needs to be tightly sealed with the matching head. It is forbidden to twist the two cables at the tail end. The power cable should be a three-core cable, in which one core is used as the ground and the cable shield is connected to the ground terminal at the same time. The internal and external ground pins must be solid and reliable. After the installation of the electric heating zone, an insulation layer is added on the outer surface, and the insulation layer is wound tightly with aluminum foil tape to reduce the loss of heat and improve the effect of electric heating.
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