Heat exchange tube device in solar heat collecting tube

Abstract

The invention discloses a heat exchange tube device in a solar heat collecting tube. The heat exchange tube device comprises a special-shaped tube head and a heat exchange tube body with one end beingclosed; the special-shaped tube head is a corrosion-resistant metal integral part; the special-shaped tube head of the device is provided with a fastening convex ring; a sealed straight neck tube isarranged on the lower portion of the fastening convex ring; a short straight neck tube is arranged on the upper portion of the fastening convex ring, or the lower portion of the sealed straight neck tube is turned into the sealed straight neck tube, and a short straight neck tube is formed; and the heat exchange tube body is connected to the short straight neck tube. Due to the fact that the vertical surfaces of tube heads of the two tubes are welded, the problems that tube wall through welding and welding skip of the stainless steel thin-walled tubes are quite liable to occur during tube head-to-tube head butt-joint welding and tube head-to-tube wall tube-insertion welding when stainless steel thin-walled tubes are used as heat exchange tube devices at present are solved, the phenomenon that an argon shield welding process cannot be normally conducted due to liable through welding caused by quite thin tube walls and welding skip is avoided, and thus the phenomenon that carbon is precipitated at welded positions, and water leakage is liable to occur due to poor corrosion resistance of leakproof heat exchange tubes is also avoided.

Description

technical field [0001] The invention belongs to the field of solar water heating devices, in particular to a heat exchange tube device in a solar heat collecting tube used in a solar water heating device. Background technique [0002] The heat collecting device on the solar water heating device used in people's life used to be a direct heating vacuum heat collecting tube, and the heat absorbing film on the vacuum heat collecting tube absorbs solar energy to heat up the water in the tube. Its disadvantage is that there is a lot of water in the tube, the temperature rises slowly, and the heat exchange speed with the water in the water tank of the solar water heating device is slow. In addition, the vacuum heat collecting tube is made of glass, which is relatively fragile, so it is easy to break when there is a big difference between the cold and heat of the upper water or the impact of heavy objects, which will cause all the water in the water tank of the solar water heating d...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a new type of heat exchange tube device used in the vacuum heat collection tube on the solar water heating device, which solves the problems of high production cost, complicated process and thin Corrosion and water leakage at the welding point of the metal heat exchange tube device of the wall stainless steel tube and the heat exchange tube body

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