Draw-out type switch cabinet

Abstract

The invention relates to the field of electrical equipment, and discloses a draw-out type switch cabinet. A front cabinet opening of a cabinet body is used for placing a corresponding drawer cabinet, the cabinet openings of the cabinet body are communicated with one another, and after each cabinet opening is placed into the corresponding drawer cabinet, a channel for communicating each cabinet opening is formed between a back plate of the cabinet body and a back plate of the drawer cabinet; the top surface, the back surface and the side surfaces of the cabinet body are an integral sealing structure; the drawer cabinet at the lowermost layer of the cabinet body is a pressure relief drawer cabinet; and a dry powder extinguishing device filled with a carbon dioxide gas and an extinguishing dry powder is arranged on the inner side of the upper portion of a back plate of the cabinet body, and a body of the dry powder extinguishing device is sealed through a hot melt adhesive. When a short-circuit accident occurs in the draw-out type switch cabinet, the temperature and the pressure of the gas in the switch cabinet are increased, the pressure relief drawer cabinet slides out of the cabinet body under the action of the high-temperature and high-pressure gas, and the cabinet opening is opened to form a pressure relief channel opening so that the high-temperature and high-pressure gas gathered due to the short-circuit accident can be quickly discharged, and deformation and even bursting are avoided.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to a draw-out switch cabinet. Background technique [0002] Switchgear is a kind of electrical equipment, whose main function is to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. The components in the switch cabinet are mainly composed of circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices. There are many classification methods of switch cabinets. For example, according to the installation method of circuit breakers, it can be divided into removable switch cabinets and fixed switch cabinets; or according to the different cabinet structures, it can be divided into open switch cabinets, metal-enclosed switch cabinets, and metal Closed armored switchgear; according to different voltage levels, it can be ...

AI Technical Summary

Problems solved by technology

However, this traditional pressure relief device is affected by the size of the cover plate. Due to the small pressure relief channel, the high temperature and high pressure gas cannot be discharged in time, causing the switchgear to deform or even explode; in addition, during the process of melting the nylon screw , the high-temperature and high-pressure gas in the switch cabinet further accumulates, and the nylon screws have not completely melted, but the switch cabinet can no longer withstand the pressure of the high-temperature and high-pressure gas inside and explodes

In addition, due to the need to ensure that the cover plate can effectively relieve pressure, it is impossible to install sealing measures at the frame of the cover plate, which makes it easier for dust to enter the high-voltage compartment and contaminate the high-voltage conductors, especially when it is used outdoors, rainwater will directly invade the inside of the switchgear , affecting the internal insulation strength and increasing the short-circuit fault

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