Normal-pressure sealed air-insulated ring main unit

Abstract

The invention relates to a normal pressure sealing air insulation ring main unit, which comprises a normal pressure switch sealing box, a pressure release chamber, a cable chamber, a mechanism operation chamber, a three-phase vacuum switch unit and a three-position isolation switch, and is characterized in that the three-position isolation switch is matched with an isolation operation mechanism, and the isolation operation mechanism drives the three-position isolation switch to perform switching action through an isolation main shaft mechanism; the three-phase vacuum switch unit is connected with the elastic operation mechanism through the opening and closing transmission mechanism, the top of a switch support of the three-phase vacuum switch unit is fixedly connected with the transmission mechanism box, a transmission mechanism installation chamber and a side end chamber are arranged in the transmission mechanism box, and the opening and closing transmission mechanism is installed in the transmission mechanism installation chamber. The elastic operation mechanism is installed in the side end chamber and partially corresponds to the position of the mechanism operation chamber, the top of the normal-pressure switch sealing box is provided with a top assembling opening, the three-phase vacuum switch unit is installed in the normal-pressure switch sealing box along the top assembling opening, and the top assembling opening is sealed and covered through the transmission mechanism box. The device has the advantages of reasonable structural layout and compact structure.

Description

technical field [0001] The invention relates to a ring network cabinet, to be precise, an air-insulated ring network cabinet with atmospheric pressure sealing. Background technique [0002] Ring network cabinet is a group of high-voltage switchgear installed in a steel metal cabinet or electrical equipment made into an assembled spaced ring network power supply unit. Among them, air-insulated ring network cabinets, also known as semi-insulated ring network cabinets, are widely used in load centers such as urban residential quarters, high-rise buildings, large public buildings, factories and enterprises due to their low cost, good insulation performance, and environmental protection. substations and box-type substations. However, due to the unreasonable structural layout of the vacuum circuit breaker in the existing air-insulated ring main unit, for example, the transmission mechanism for the opening and closing operation of the vacuum circuit breaker is arranged in the air ...

AI Technical Summary

Problems solved by technology

However, due to the unreasonable structural layout of the vacuum circuit breaker part in the existing air-insulated ring main unit, such as the transmission mechanism for the opening and closing operation of the vacuum circuit breaker is arranged in the air box at the same time as the three-phase vacuum circuit breaker unit, resulting in existing domestic Most of the air-insulated ring network cabinets have the disadvantage of inconvenient assembly and maintenance, and the ring network cabinets are too large to meet the increasingly stringent size miniaturization requirements for air-insulated ring network cabinets

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