Solar anti-explosion heat collecting pipe

Abstract

The invention provides a solar anti-explosion heat collecting pipe which comprises an inner-layer glass pipe and an outer-layer glass pipe. A vacuum layer is arranged between the inner-layer glass pipe and the outer-layer glass pipe. A short pipe made of an opaque insulation material is arranged at the bottom in the outer-layer glass pipe. The outer surface of the short pipe is tightly attached to the outer-layer glass pipe. The port of the short pipe is higher than the bottom of the inner-layer glass pipe. The short pipe contains mercury. The amount of mercury, the volume of the vacuum space above the port of the short pipe and the volume of the short pipe are in the following characteristic relation that when the temperature of the mercury is lower than 90% of the boiling point of liquid in the inner-layer glass pipe, the volume of the mercury is smaller than the volume of the short pipe; when the temperature of the mercury reaches the boiling point, the volume of the mercury is equal to the sum of the volume of the short pipe and the volume of the vacuum space above the port of the short pipe. By the adoption of the solar anti-explosion heat collecting pipe, the temperature in the pipe can be effectively prevented from being too high and the pipe explosion phenomenon is avoided.

Description

technical field [0001] The invention relates to the field of solar energy facilities, in particular to a solar heat collecting tube. Background technique [0002] At present, ordinary vacuum heat collecting tubes are composed of inner and outer glass tubes, and there is a vacuum interlayer between the two layers of glass tubes. Since the water body or medium in the pipe will continue to heat up during the process of being continuously irradiated by the sun, if the pressure is not released in time, it is easy to cause a pipe burst. In actual use, typically, if you forget to add water to the solar water heater, it is extremely easy to burst the pipe in summer. On the other hand, in order to release the pressure of the vacuum heat collecting tube, it is necessary to open air holes on the heat preservation equipment. Due to the beginning of the air holes, the heat preservation effect is affected, and the heat storage capacity of the outdoor solar energy equipment is greatly r...

AI Technical Summary

Problems solved by technology

Since the water body or medium in the pipe will continue to heat up during the process of being continuously irradiated by the sun, if the pressure is not released in time, it is easy to cause the pipe to burst

In actual use, typically, if you forget to add water to the solar water heater, it is extremely easy to burst in summer

On the other hand, in order to release the pressure of the vacuum heat collecting tube, it is necessary to open air holes on the heat preservation equipment. Due to the beginning of the air holes, the heat preservation effect is affected, and the heat storage capacity of the outdoor solar energy equipment is greatly reduced.

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