Solar vacuum heat collecting pipe with double expansion joints

A technology of vacuum heat collecting tubes and expansion joints, which is applied in the field of heat collecting tubes of trough solar heat collectors and trough solar concentrators, can solve the problems of large heat absorbing parts, affecting life, and not easy to fix Reduce heat dissipation, improve utilization efficiency, and facilitate installation and fixation

Active Publication Date: 2017-02-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current internal expansion joint type and external expansion joint type vacuum heat collecting tube, the heat absorbing part of the heat a

Method used

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  • Solar vacuum heat collecting pipe with double expansion joints
  • Solar vacuum heat collecting pipe with double expansion joints
  • Solar vacuum heat collecting pipe with double expansion joints

Examples

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[0020] The present invention will be further explained below in conjunction with the drawings.

[0021] Such as figure 1 , 2 , 3 and 4 show a trough-type double expansion joint vacuum heat collector tube, including glass tube 1, Kovar alloy tube 2, outer expansion joint 3, flange 4, inner expansion joint 5, support sleeve 6, suction tube Heat pipe 7, getter 8; the glass tube 1 and the Kovar alloy tube 2 are connected by welding, the Kovar alloy tube 2 and the outer expansion joint 3 are connected by welding, and the outer expansion joint 3 and flange 4 are connected by welding For connection, the flange 4 and the inner expansion joint 5 are connected by welding, the inner expansion joint 5 and the support sleeve 6 are connected by welding, the support sleeve 6 and the heat absorption tube 7 are connected by welding, and the getter 8 is placed in the vacuum tube.

[0022] The heat collection tube adopts an outer expansion joint 3 and an inner expansion joint 5, and both expansion jo...

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Abstract

The invention discloses a solar vacuum heat collecting pipe with double expansion joints. The solar vacuum heat collecting pipe comprises the inner expansion joint, the outer expansion joint, a kovar alloy pipe, a glass pipe, a heat absorbing pipe, a supporting casing pipe, a flange and a degasser. The glass pipe and the kovar alloy pipe are connected in a fusion seal manner. The kovar alloy pipe and the outer expansion joint are connected through welding. The outer expansion joint and the flange are connected through welding. The flange and the inner expansion joint are connected through welding. The inner expansion joint and the supporting casing pipe are connected through welding. The supporting casing pipe and the heat absorbing pipe are connected through welding. The inner expansion joint and the outer expansion joint are both multi-layer type expansion joints. A fixing bolt hole and a sealing groove are formed in the flange. A vacuum heat collecting pipe body and a tracking device are fixed through the flange. The degasser is located in the kovar alloy pipe located at the end portion. The heat collecting pipe is reasonable in design, capable of improving the heat collecting efficiency, convenient to fix, firm, durable and capable of more safely running.

Description

technical field [0001] The invention relates to a trough type solar heat collecting device, in particular to a heat collecting tube of a trough type solar concentrating heat collector, and belongs to the technical field of energy utilization. Background technique [0002] As a clean, non-polluting renewable energy source, solar energy is considered an important part of the world's energy strategy for its development and utilization. Solar thermal utilization is the most important way in solar energy utilization. The trough solar thermal utilization system mainly uses the trough parabolic concentrator to reflect sunlight and gather it on the heat collecting tube, and export the heat energy through the medium in the tube for utilization. It has a relatively high efficiency. High, large scale, easy to standardize and so on. [0003] Solar thermal power generation is a method to replace conventional energy sources, and it is one of the focuses of scientists and governments in v...

Claims

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Application Information

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IPC IPC(8): F24J2/05F24J2/38F24J2/46F24S10/40F24S50/20
CPCF24S10/40F24S50/20F24S80/00Y02E10/44Y02E10/47
Inventor 苏中元王军张耀明
Owner SOUTHEAST UNIV
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