Sealing port protection device of groove-type light gathering vacuum pipe

Abstract

The invention relates to a light gathering vacuum pipe, in particular to a sealing port protection device of a groove-type light gathering vacuum pipe. The protection device comprises a shading sleeve, wherein the shading sleeve is sleeved outside a sealing port of the groove-type light gathering vacuum pipe and is used for preventing light gathering rays from irradiating on the sealing port. The shading sleeve is utilized to shade light gathering spots which are vertical incident to a glass pipe and a metal sheet at an end head of the light gathering vacuum pipe, an upper shading ring and a lower shading ring are utilized to shade light gathering sports which are obliquely incident to the glass pipe and the metal sheet at the end head of the light gathering vacuum pipe, the problems that the metal sheet is deformed, the sealing port of the glass pipe and the metal sheet is cracked, the groove-type light gathering vacuum pipe is failure and the like caused by excessive high sealing port temperature are solved, and the service life of the groove-type light gathering vacuum pipe is prolonged.

Description

technical field [0001] The invention relates to a light concentrating vacuum tube structure, in particular to a groove-type concentrating vacuum tube sealing port protection device. Background technique [0002] The existing trough-type concentrating vacuum tube is composed of a glass cover tube, a metal heat-absorbing tube core, a glass-metal sealing end and a bellows, and the glass-metal sealing end is sealed by a circular glass tube and a metal dome. There are two ways of sealing glass and metal: fusion sealing interface and special material bonding sealing interface. [0003] When the concentrating vacuum tube is applied to the trough-type concentrating system, and the concentrating ratio of the concentrating system is 30 to 100 times, the temperature rise of the metal tube core of the concentrating vacuum tube is between 300°C and 600°C due to the light spots generated by the concentrating. . The light spot is focused on the tube core of each vacuum tube in the entire...

AI Technical Summary

Problems solved by technology

[0004] When the concentrator vacuum tube is working at high temperature, because the thermal expansion of the metal steel tube core is much greater than that of the glass, the bellows absorb the expansion of the steel tube and at the same time, the sealing interface between the glass and the metal parts at the end of the concentrator vacuum tube is also produced. If the pulling force is too high, the sealing port will be damaged, which will lead to the failure of the trough-type concentrating vacuum tube

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