Tätningen av värmningsröret är verkligen viktigt

​In the heating tube structure, dense powder filler is filled between the spiral heating wire and the metal tube shell. When the filler is dry and dense, it has good thermal conductivity and thermal insulation performance. But they all have different degrees of hygroscopicity. The ends of the heating tube filler are exposed. Once it is damp and Hygroskopisk, dess elektriska isoleringsprestanda reduceras kraftigt .

When heating the tube, the hygroscopicity of the filler has a greater impact on the insulation performance of the electric heating tube. On the other hand, when magnesium oxide is absorbed by water, part of the magnesium oxide (especially the part with poor or imperfect crystallization) will be hydrated. Magnesium hydroxide will make its molecular particle size thicker and aggregat .

For electric heating tubes, the tube mouth absorbs the most water, so the agglomeration is more serious. Once the tube mouth agglomerates, the water absorbed by the filler deeper than the tube mouth is more difficult to discharge, resulting in the inability to insulate the electric heating tube when it is powered on, and even the water in the heating tube evaporates and expands due to heat, causing the false heating tube wall to bulge and Burst .

When the humidity decreases, the thickening of the molecular particle size after hydration affects the recovery of the insulation resistance of the heating tube. At these two points, the electric heating tube needs to seal the tube mouth. Therefore, the sealing of the pipe mouth of the electric heating tube is a very important production link.