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Expansion compensation device of solar evacuated collector tube and processing technology thereof

A vacuum heat collector tube and expansion compensation technology, applied in the field of expansion compensation devices, can solve the problems of complicated process, reduced connection strength and air tightness, affecting product performance, etc., and achieve the effects of simple operation, easy annealing and simple structure

Inactive Publication Date: 2010-05-12
HIMIN SOLAR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of structure is complex in the processing process, and the finished product can only be used in the medium temperature field. In the high temperature state, its connection strength and air tightness will be reduced, which will directly affect the performance of the product.

Method used

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  • Expansion compensation device of solar evacuated collector tube and processing technology thereof
  • Expansion compensation device of solar evacuated collector tube and processing technology thereof
  • Expansion compensation device of solar evacuated collector tube and processing technology thereof

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0026] Such as Figure 1-2 As shown, a solar vacuum heat collecting tube 6 includes a metal inner tube 1 and a glass outer tube 2 coaxial therewith. The glass outer tube 2 is made of glass with high light transmittance, the metal inner tube 1 is made of stainless steel alloy, and the outer wall of the metal inner tube 1 is coated with a high-temperature selective absorption coating. The heat loss is reduced by vacuuming between the glass outer tube 2 and the metal inner tube 1, and the longitudinal thermal expansion stress is relieved by an expansion compensation device.

[0027] Specifically, such as Figure 1-2 As shown, the expansion compensation device described in the embodiment of the present invention adopts the bellows 3 with expansion compensation function. The bellows 3 is sleeved ou...

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Abstract

The invention discloses an expansion compensation device of solar evacuated collector tube and a processing technology thereof, relating to the field of solar evacuated collector tube. The expansion compensation device is arranged between an inner metal tube and an outer glass tube and comprises a corrugated tube arranged on the outer part of the inner metal tube; one end of the corrugated tube is fixedly connected with the inner metal tube via a connecting piece, and the other end of the corrugated tube is fixedly connected with the outer glass tube via a glass metal transition piece. The device of the invention is suitable for medium and high temperature and has the advantages of simple structure and favourable gas tightness. The processing method of the device of the invention comprises the steps of cleaning, burning hydrogen for annealing treatment, sealing and annealing and has the advantages of simple operation and easy annealing.

Description

technical field [0001] The invention relates to the field of concentrator-type vacuum heat collecting tubes for solar heat utilization, and more specifically, the invention relates to an expansion compensation device for solar vacuum heat collecting tubes and a processing technology thereof. Background technique [0002] Solar energy is the most important basic energy among all kinds of renewable energy. It has the advantages of abundant resources, inexhaustible, inexhaustible, and will not pollute the environment and destroy the ecological balance. Therefore, in today's world where fossil fuels are decreasing year by year and the international energy situation is becoming increasingly severe, the development and utilization of solar energy is one of the important ways to realize the diversification of energy supply and ensure energy security. The concentrator-type solar vacuum heat collector can be applied in the field of industrial heating and power generation. It is an im...

Claims

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Application Information

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IPC IPC(8): F24J2/46C03C27/00
CPCY02E10/40
Inventor 李健李建斌雷东强李雪峰王智建
Owner HIMIN SOLAR
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