New high-efficiency energy-saving finned electric heating tube

Abstract

The invention relates to a novel energy-efficient fin type electric heating pipe which comprises a shell, a heating wire and heat-conducting insulating padding. A strip-shaped cooling fin is spirally wound on the outer surface of the shell and provided with continuously-distributed fan-shaped concave-convex structures, the shrinkage end of each structure is close to the surface of the shell, the unfolded end of each structure is close to the outer edge of the fin, and a smooth arc transition face is arranged between each unfolded end and the outer edge of the cooling fin. Mounting seats are connected with the shell in a sealed mode, power lines are arranged on the end portions of the mounting seats, and the power lines are connected with the heating wire in the shell through the mounting seats. The continuous concave-convex structures which are arranged at intervals are adopted by the cooling fin, the fin can be conveniently wound on the shell, and internal stress of the cooling fin is effectively eliminated. Welding machining is facilitated, the width of the fin is not limited, the cooling area is enlarged, the cooling effect is better, and the service life of the electric heating pipe is longer. Cooling efficiency of the fin is enhanced, the power of the electric heating pipe can be properly lowered, and the purposes of efficiency raising and energy saving are achieved.

Description

technical field [0001] The invention relates to an electric heating device, in particular to a novel high-efficiency and energy-saving finned electric heating tube mainly used for heating gas. Background technique [0002] The electric heating tube used for heating gas generally includes a shell and an electric heating wire arranged in the shell. The space between the electric heating wire and the shell is filled with heat-conducting insulating medium such as magnesia, and the two ends of the electric heating tube shell are respectively provided with mounting seats. , There is a power cord connected to the heating wire on the mounting base. Existing finned electric heating tubes usually wrap a circle of stainless steel strips on the outer surface of the shell to form erected fins to increase the heat dissipation area of ​​the electric heating tube to improve the thermal efficiency of the electric heating tube during operation. At present, due to the limitation of the windin...

AI Technical Summary

Problems solved by technology

The above-mentioned electric heating tube mainly adopts linear heat dissipation fins. When the heat dissipation fins are wound on the circular electric heating tube shell, the limitation on the width of the fins is further increased, and the heat dissipation effect is not ideal.

On the other hand, the internal stress of the heat dissipation fins after spiral winding is relatively large, and it is difficult to weld, and the solder joints are prone to loosening after a period of use, resulting in a short service life of the entire electric heating tube

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