A pre-buried package transformer

Abstract

A pre-installed underground box-type transformer includes a transformer, a distribution cabinet and a prefabricated pit foundation, the transformer is arranged in the prefabricated pit foundation, the pre-installed underground box-type transformer is further provided with a pit operation box, the pit operation box is positioned on the horizontal plane; the depth of the prefabricated pit foundation is lower than the height of the transformer, terminal blocks of the transformer are higher than the horizontal plane and extend in the pit operation box, and are further respectively connected with the distribution cabinet by cables; a pit operation cover is arranged on the pit operation box, so the maintenance personnel can carry out the maintenance of the transformer on the ground; and the distribution cabinet is arranged beside the pit operation cover. As the transformer is buried in the prefabricated pit foundation and the terminal blocks of the transformer are raised above the horizontal plane, the invention can reduce the depth of the pit, lower the construction difficulty and effectively avoid the water immersion of the terminal blocks.

Description

technical field [0001] The invention relates to a substation, in particular to a pre-installed underground box-type transformer. Background technique [0002] China's urban construction has undergone old city demolition, road widening, building facade renovation and urban network transformation, and has gone through urban green space, cable power supply and lighting projects, and is now entering a stage aimed at improving streetscapes and city appearances. Urban beauty stage. Pedestrian commercial streets, leisure centers and boutique blocks successively launched in advanced cities can be said to be close to international standards, but the rectification of box-type substations occupying roads has had little effect, mainly because the urban pipe network is very complicated, and box-type substations can be seen everywhere. Substations not only occupy the space on the ground, but also are disorderly and disturbing, especially in urban residential areas, the electromagnetic ra...

AI Technical Summary

Problems solved by technology

Pedestrian commercial streets, leisure centers and boutique blocks successively launched in advanced cities can be said to be close to international standards, but the rectification of box-type substations occupying roads has had little effect, mainly because the urban pipe network is very complicated, and box-type substations can be seen everywhere. Substations not only occupy the space on the ground, but also are scattered and disorderly, which is disturbing. Especially in urban residential areas, the electromagnetic radiation of box-type substations is even more worrying.

In the prior art, the underground transformer technology has been adopted, but there are the following defects: (1) The pit occupies a large underground space, generally 2.5 to 3 meters deep, which makes the originally intertwined and complicated underground pipe network more crowded, and the groundwater In areas with high ground, the construction of earth pits is very difficult, and the transformer runs underwater, which may easily lead to water leakage at the cable head; (2) Since the depth of the pit is higher than that of the transformer, after the transformer fails, it must be repaired Personnel need to enter the pit for maintenance. Due to the limitation of the small space of the pit, the maintenance is very inconvenient and the maintenance time will be longer; (3) When the transformer needs to be replaced after a failure, due to the After setting up the advertising light box and the distribution box, it is necessary to disconnect all the connections of the distribution box, and lift the light box away from the pit cover, so that the pit cover can be opened to replace the transformer, so that the working time for replacing the transformer is as long as 4 hours. ~8 hours, and from the beginning of the power outage to the restoration of power supply, it actually needs to go through multiple links such as reporting faults, on-site inspections, formulating maintenance solutions, replacing transformers, and restoring power supply. hours, the power supply cannot be restored in time, causing great inconvenience to surrounding users; (4) Since the pit is only provided with vents on the top, the heat dissipation is extremely poor, and a forced ventilation mechanism must be installed, which will affect the underground transformer and related electrical components. Carry out timely heat exchange, once the forced ventilation mechanism fails, it is easy to cause the transformer to fail due to overheating; (5) Since the advertising light box on the ground plane is usually equivalent to the length of the pit, the area of ​​the light box is relatively large , when the underground transformer is installed in a commercial block, it will cause a certain visual obstacle to the shop and have an adverse effect on the commercial value of the shop, which will lead to resistance to the electric power department's construction of the underground transformer in the commercial block

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