High-temperature vacuum tube

A vacuum tube, high temperature technology, applied in the direction of heat preservation, pipeline protection, pipeline protection through heat insulation, etc., can solve the problems of poor quality insulation tube, high thermal conductivity, high heat loss, etc., to prolong the service life and suppress radiation heat transfer , the effect of reducing heat loss

Inactive Publication Date: 2011-08-10
SOLAR & ENVIRONMENTAL TECH TIANJIN CORP
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Problems solved by technology

Therefore, the thermal conductivity of ceramic fiber insulation materials is relatively high at high te...

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[0025] The high-temperature heat-insulating pipe of the present invention is a high-temperature vacuum pipe, also known as a vacuum interlayer pipe, and there are three basic modes of heat energy transfer: heat conduction, heat convection and heat radiation. When the temperature is as high as 800 to 1000°C, the heat transfer process is dominated by radiation heat transfer, and the radiation wavelength is in the range of 0.76 to 20 μm in the infrared (also known as heat ray) section. To reduce heat loss at high temperatures, radiative heat transfer must be suppressed. A metal surface with a high finish has a relatively high reflectivity to infrared radiation, which can be used to reduce radiation heat transfer. The vacuum interlayer tube uses this principle.

[0026] The high temperature vacuum tube of the present invention is mainly composed of the following parts:

[0027] Flange 1 is used for connection and sealing;

[0028] The inner tube 2 is made of stainless steel and ...

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Abstract

The invention discloses a high-temperature vacuum tube. The vacuum tube mainly comprises flanges, an inner tube, a corrugated tube and an outer tube, wherein two ends of the inner tube and the outer tube are connected with the flanges respectively; the corrugated tube is connected with the outer tube and used for compensating swelling amount; and the inner wall of the outer tube is polished. The heat radiation of infrared band is reflected by adopting a metal surface with high finishment, so radiation heat loss is effectively reduced; and heat loss caused by air heat conduction and heat convection is inhibited by the interlayer vacuumizing design between the inner and outer tubes. The high-temperature vacuum tube inhibits radiation heat transfer at a high temperature more effectively, has good inhibiting effect on heat transfer, and effectively prevents the loss of heat during transferring.

Description

technical field [0001] The invention relates to a high-temperature vacuum tube, in particular to a high-temperature vacuum tube in the field of solar thermal power generation. Background technique [0002] In the solar thermal power generation device of the prior art, a large number of fluid pipelines for transporting high-temperature fluids are included, such as image 3 and Figure 4 As shown, the fluid pipeline 5 is composed of a large number of high-temperature heat-insulating tubes connected end to end. The high-temperature vacuum tube should have a structure that prevents the heat of the internal high-temperature fluid from being transferred to the outside, so as to effectively improve the efficiency of solar power generation. [0003] There are three basic ways to transfer heat energy: heat conduction, heat convection and heat radiation. When there is no relative displacement between the various parts of the object, the thermal energy transfer generated by the therma...

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Application Information

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IPC IPC(8): F16L59/08F16L59/065
Inventor 刘晓冰哈金龙艾家艨张伟红
Owner SOLAR & ENVIRONMENTAL TECH TIANJIN CORP
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