Vacuum heat preservation system for thermal pipeline

Abstract

The invention discloses a vacuum heat preservation system for a thermal pipeline. The system comprises the thermal pipeline, wherein a first pipe body sleeves the thermal pipeline; a second pipe bodysleeves the first pipe body; a plurality of first through holes distributed uniformly are formed in the surface of the first pipe body; a piston pipe is fixedly arranged in each first through hole andperpendicular to the surface of the first pipe body; a partition plate is fixedly arranged in the middle of each piston pipe; a piston column is matchably arranged in the two ends of each piston pipe; a first rod body is fixedly arranged on outer end of each piston column; an ejector block is arranged at the outer end of each first rod body; a second through hole is formed in the first pipe body;a third through hole is formed in the second pipe body; a valve is fixedly arranged at the outer end of the third through hole; the other end of the valve is fixedly connected with one end of an exhaust pipe; the other end of the exhaust pipe is connected with an air inlet end of a vacuum pump; the ejector block is made of a heat insulation material; a first annular cavity is formed between the first pipe body and the thermal pipeline; and a second annular cavity is formed between the second pipe body and the first pipe body. The system is simple in structure, convenient to install and good in heat preservation effect.

Description

technical field [0001] The invention belongs to the technical field of thermal engineering, in particular to a thermal pipeline vacuum insulation system. Background technique [0002] Existing heat pipes with a temperature of about 100°C use polyurethane foam or mineral wool as insulation materials, while heat pipes with a temperature above 110°C and higher temperatures can only use heat-resistant insulation materials such as mineral wool , In general, steam pipes and heat transfer oil pipes need an insulation layer with a thickness of 70-100 mm to achieve a more ideal insulation effect. Because there are gaps in the skin wrapping materials of the existing heat pipes, there is such a "breathing" phenomenon: that is, if the heat pipe stops running, the air temperature in the skin drops and a negative pressure occurs, the outside air will be sucked in, and the air will The moisture will be adsorbed and accumulated in the insulation material, especially in the wet environment ...

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Problems solved by technology

[0004] Authorized announcement number: The application of CN204164595U discloses a thermal pipeline vacuum insulation system. The installation of the stainless steel casing of the technical solution of the application requires an additional cage for fixing. The cage not only increases the volume of the equipment but also increases the construction cost. Increase the use of materials. This design will result in the use of a large amount of steel materials after it is widely used. This design is not conducive to installation in a narrow environment, and it is difficult to fix the cage. The surrounding environment requirements are relatively high, and the stainless steel casing is set on the thermal pipeline, which is inconvenient for later maintenance and replacement

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