Heat dissipation system of underground box type transformer

Abstract

The invention discloses a heat dissipation system of an underground box type transformer, comprising a natural convection heat dissipation system mechanism formed by air chutes arranged around a transformer body in a pit box and a ventilation opening arranged on the ground. The heat dissipation system is characterized by further comprising a reinforced heat exchange mechanism which is arranged onat least one outer wall of the transformer body (4) and contacted with the inner wall of the pit box (1), so that the heat generated by the transformer body (4) is transmitted into the pit box (1) through the reinforced heat exchange mechanism, and the heat is then transferred into the surrounding stratum through the pit box. The heat dissipation system combines natural ventilation and forced ventilation, and adopts surface soil layer heat dissipation, so as to improve the heat dissipation effect and ensure lasting and stable heat dissipation; furthermore, the size of the pit box can be reduced to the utmost extent, and the pre-buried underground space is saved.

Description

technical field [0001] The invention relates to a heat dissipation system of an underground box-type transformer, in particular to a heat dissipation system which utilizes surface soil layers to dissipate heat to improve the heat dissipation effect and ensure long-lasting and stable heat dissipation. Background technique [0002] The pre-installed underground box-type transformer is one of the most commonly used transformers at present. Its transformer is buried in the pit box. This structure can greatly save the space above the ground. But this type of transformer body is completely buried below the ground surface, so the heat generated when it works is easily confined in the narrow space between it and the pit box, see figure 1 , 2 , the existing pre-installed underground box-type transformer includes a transformer body 4, a power distribution cabinet 6, and a prefabricated pit box 1. The cabinet 6 is connected, and some designs also include a pit operation box 7 on the ...

AI Technical Summary

Problems solved by technology

[0004] (1) It is difficult to adapt to the trend of miniaturization of the transformer pit box

Due to the complex intertwining of modern urban underground pipe networks and the tendency to become more and more crowded, the space available for placing pre-installed transformers in the urban underground is increasingly limited, resulting in more and more requirements for the floor area of ​​the transformer pit box. With the trend of getting smaller and smaller, the external space of the transformer located in the pit box is getting smaller and smaller, making it difficult for the existing heat dissipation system that mainly relies on air convection to dissipate heat to meet the heat dissipation requirements of the transformer for long-term safe operation, and it has become the popularization and use of underground box-type transformers. the bottleneck

[0005] (2) Once the forced ventilation mechanism fails, if it is not found and repaired in time, it is still easy to cause the transformer to fail due to overheating

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