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Vacuum insulation pipe filled with inert gas

A technology of inert gas and vacuum insulation, applied in the direction of pipeline protection through heat insulation, heat preservation, pipeline protection, etc., can solve the problems of large heat loss of heat insulation pipelines, high vacuum requirements, complex construction, etc.

Inactive Publication Date: 2011-04-06
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

[0005] The present invention is to provide a vacuum insulation pipeline filled with inert gas, which is used to solve technical problems such as large heat dissipation loss of conventional insulation pipelines, excessively high requirements on vacuum degree of general vacuum insulation pipelines, difficulty in maintaining vacuum degree, and overly complicated construction.

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  • Vacuum insulation pipe filled with inert gas
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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] Such as figure 1 As shown, the inert gas-filled vacuum insulation pipeline of the present invention includes a vacuum tube 1, an outer tube 3, an inert gas inflation tube 4, an inner tube 5, a vacuum valve a7, and a vacuum valve b8.

[0013] Inside the inner tube 5 there is a working medium 6 .

[0014] Between the inner tube 5 and the outer tube 3, superfine particle (fiber) insulation material 2 is filled, and the air in the insulation material space is replaced by inert gas with low thermal conductivity such as argon, krypton, xenon, etc., and the inert gas argon, krypton, xenon, etc. The vacuum state is maintained, and the absolute pressure is 10-15000 Pa. The lower the pressure, the better the heat preservation effect. The heat dissipation loss of the present invention is only 2.5%-25% of that of conventional heat preservation pipes of the ...

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Abstract

The invention relates to a vacuum insulation pipe filled with inert gas, wherein, an ultrafine particle (fiber) insulation material is filled between an inner pipe and an outer pipe; the ultrafine particle (fiber) insulation material is filled with low-thermal conductivity inert gas maintained in a vacuum state such as argon, krypton, xenon and the like; and the vacuum absolute pressure of the inert gas in the ultrafine particle (fiber) insulation material is 10-15000Pa, and better insulation effect can be obtained under lower pressure. In the invention, the adopted low-thermal conductivity inert gas has better thermal insulation property than that of air, and the ultrafine particle (fiber) insulation material prevents collision of gas molecules so as to hinder heat conduction; the ultrafine particle (fiber) insulation material also prevents heat transfer caused by convection and irradiation; and the radiating loss of the vacuum insulation pipe is about 2.5%-25% of that of the conventional insulation pipe with the same thickness and the same material and is only 50% of that of the common vacuum insulation pipe (not filled with inert gas) under the same vacuum degree.

Description

technical field [0001] The invention relates to a vacuum insulation pipeline, in particular to a vacuum insulation pipeline filled with inert gas. Background technique [0002] Due to the rapid development of China's economy, the consumption of energy is increasing at an alarming rate. The thermal insulation project of pipelines is an important measure to save energy, but it has not received due attention for a long time. According to preliminary estimates, the heat loss of China's thermal pipelines is about Accounting for 7.5-8% of the coal consumption of the entire heating system, China's current energy utilization efficiency is about 29%, which is about 10 percentage points lower than the world's advanced level, and the waste of resources is serious. How to reduce the loss of heat and improve the effective utilization of heat has become a The key to energy saving and emission reduction. [0003] The conventional pipeline insulation method is to lay insulation materials o...

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Application Information

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IPC IPC(8): F16L59/02F16L59/06
Inventor 仇中柱肖刚李芃周沛黎文峰龚少林
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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