Means for adjusting roadbed convective heat exchange in hairpin manner

Abstract

The invention relates to a means for adjusting roadbed convective heat exchange in hairpin manner; the means includes fixing an axial rod to the wall of a vent pipe, and sleeving the axial rod with a spindle sleeve; fixing a ventilation door to the spindle sleeve; setting a support rod in the center of the axial rod, and connecting the support rod to one end of a hairpin telescopic pipe through hinge I; connecting the other end of the hairpin telescopic pipe to the ventilation door through hinge II. The means has the advantages of simple structure, convenience in installation and high stability, and the meas can fully adapt to the extremely severe environment on Qinghai-Tibet plateau, meet the special requirements of engineering construction, and improve cooling efficacy of the ventilating roadbed maximally.

Description

technical field [0001] The invention relates to the technical field of frozen soil engineering, in particular to a hairpin-type measure for controlling convective heat transfer of roadbeds. Background technique [0002] In permafrost regions such as the Qinghai-Tibet Plateau and Northeast my country, through long-term evolution, development and changes, thick layers of underground ice with a thickness of several meters or even more than ten meters have been formed. With the change of climate and environment and the impact of human engineering activities, permafrost and underground ice will degrade and melt, which will cause various engineering disasters and have an important impact on the stability of various major engineering buildings. [0003] Taking measures to protect frozen soil engineering and actively cooling the frozen soil foundation is the key way to ensure the long-term safe operation and stability of frozen soil engineering. Among these measures, effectively co...

AI Technical Summary

Problems solved by technology

[0007] ⑴ There are many components. In invention ①, in addition to the damper and transmission piston, there are also piston barrels and springs inside, and these dampers and transmission components are placed separately, which increases the difficulty of layout

[0008] ⑵The structure is complex. In the invention ②, the components composed of oil and water are used as the gravity unit, and there is an oil discharge container inside the water discharge container, which increases the difficulty of processing and maintenance

[0009] ⑶ In areas with harsh environments such as the Qinghai-Tibet Plateau, there is a lot of wind and sand, and the parts of the piston are easily blocked and frozen and cannot work. However, the design of using water and oil as the gravity source cannot guarantee the good flow of liquid at low temperature

[0010] ⑷ many parts

As a result, the structure is more complicated, the stability is poor, and the operation and maintenance of the Qinghai-Tibet Plateau is difficult, and the use cost is high

[0011] It can be seen that these technologies are difficult to work effectively in the extreme environment of the Qinghai-Tibet Plateau, and it is difficult to meet the actual needs of the project

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