Self anti-scale corrosion-resisting electrical heated tube

Abstract

The invention discloses a self anti-scale corrosion-resisting electrical heated tube, relates to the technical field of electrical heated tubes, in particular to a self anti-scale corrosion-resisting electrical heated tube. The electrical heated tube is characterized by consisting of an external metal pipe casing and an internal metal pipe casing which are made of two different types of metallic materials, wherein an air layer is arranged between the external metal pipe casing and the internal metal pipe casing; and the middle section of the electrical heated tube is provided with a casing merge point pressed by the external metal pipe casing and the internal metal pipe casing. The electrical heated tube has the advantages of effectively solving the scaling problem on the surface of the electrical heated tube so that the electrical heated tube can keep normal heat conduction, improving the corrosion resistance of the electrical heated tube, prolonging the service life of the electrical heated tube, and greatly improving the safety performance and service cycle of the whole machine.

Description

Technical field [0001] The invention relates to the technical field of electric heating tubes, in particular to a self-scale and corrosion-resistant electric heating tube. Background technique [0002] The structure and manufacture of the existing water-heating electric heating tubes are all formed by processing and combining lead-out rods, electric heating wires, magnesium oxide powder, and metal outer pipes. In the process of heating water, the electric heating tube manufactured by this traditional structure and production process, because the calcium ions and carbonate ions in the water are easy to attach to the surface of the electric heating tube, forming calcium carbonate scale, the water quality in some areas has a high alkalinity, After a long heating time, serious scale will form on the surface of the electric heating tube, which will make it difficult to conduct the heat of the electric heating tube. On the one hand, the thermal efficiency will be greatly reduced. ...

AI Technical Summary

Problems solved by technology

The electric heating tube manufactured by this traditional structure and production process is in the process of heating water, because calcium ions and carbonate ions in the water are easy to attach to the surface of the electric heating tube, forming calcium carbonate scale, and some areas have high water alkalinity. After a long heating time, serious scale will form on the surface of the electric heating tube, which will make it difficult to conduct the heat of the electric heating tube. On the one hand, the thermal efficiency will be greatly reduced. If the wire fuses, the heating will be stopped, or the internal temperature of the electric heating tube will rise due to slow heat transfer, and the sintering of magnesium oxide powder will cause the insulation to drop, which will directly affect the safety performance of the whole machine.

In order to remove scale, there is also a technology of exchanging cold and hot water with timer control to remove scale from electric heating pipes. However, the structure is complicated, not only adding a lot of accessories, but also affecting the heating speed. Therefore, how to effectively solve the problem of electric heating pipes being heated in water? The problem of scaling in the process has always been the goal pursued by the entire electric heating tube manufacturing industry

Images