According to its shape, heating tubes can be divided into single-ended straight tubes, double-ended straight tubes, U-shaped tubes, W-shaped tubes and special-shaped tubes. Therefore, the special-shaped tube is a kind of heating tube. Because of its irregular shape, it is collectively called the special-shaped heating tube. Different heating tubes are evenly distributed in high temperature resistant stainless steel seamless tubes. Dense part of the gap fills the crystalline magnesia powder with good thermal conductivity and insulation. This structure is not only advanced, but also has high thermal efficiency and even heating. When the high temperature resistance wire diffuses to the metal surface through the heat crystallization of magnesia powder in the current, the large heating platform manufacturer uses heating again. Or air, to achieve the purpose of heating.

Material for key components of electric heat pipe construction: 2. Resistance wire (heating wire); 3. Magnesium oxide powder; 4. Sealing. Among them, different environmental protection heating equipment uses different heating tubes, heating wires, magnesia powder and sealing materials.

The material selection of each part of heating pipe should not be careless, which directly affects the quality of heating pipe products. Today we are going to discuss the importance of heating line selection:

Electric heating pipe is mainly made of external metal pipe, high temperature magnesia powder and internal heating wire. The voltage of heating pipe is required to select the appropriate diameter of heating wire according to the power. Then the uniform fine spiral metal is machined. Secondly, the metal pipe of shrinkage pipe is machined according to the actual needs. In the quenching process, the heating wire of uniform distribution pipe is finally distributed, and then the heating wire and the wall of metal pipe are filled with filler. The gap is filled with fine high temperature magnesia powder and sealed at the outlet of the pipeline for insulation.

The three main parts of the heating tube are indispensable and complementary. External metal tube mainly plays the role of container, protecting internal structure and heat transfer; high temperature magnesium powder mainly plays the role of heat conduction and heat preservation, so that there is no conduction phenomenon between heating wire and metal tube, and it is safe to use. Electric heating wire is the core of heat pipe, which mainly plays a heating role and is the heat source of heat pipe.

Because of the different use environment, the heating wires in the heating tube are also different in production, mainly including chromium-iron-aluminium wire and nickel-chromium wire.

Ferro-chromium-aluminium heating wire: good oxidation resistance, high resistivity, low high temperature strength, high temperature deformation and bending, high surface load, low price.

Nickel-chromium electric heating wire: good plasticity, corrosion resistance, long service life, high price.