Damp-proof terminal box

Abstract

A damp-proof terminal box comprises a box body and a top cover arranged at the top of the box body. The damp-proof terminal box is characterized in that the top cover comprises an outer cover body and an inner cover body arranged in the outer cover body; a condensation cavity is formed between the outer cover body and the inner cover body; a dehumidification hole communicated with the interior of the box body and the condensation cavity is formed in the inner cover body; an exhaust blower is arranged on the dehumidification hole; condensation screens are arranged in the condensation cavity; breathing holes communicated with the exterior and the condensation cavity are formed in the bottom of the outer cover body; and the exhaust blower lead moisture in the box body into the condensation cavity, the moisture condensed into water droplets after encountering the condensation screens, and the water droplets are discharged to the exterior of box body through the breathing holes. Owing to the arrangement of the condensation cavity, the leak tightness of the box body can be ensured, the moisture is effectively prevented from entering the box body through a dehumidification channel, moisture supplement is cut off from the source, and the damp-proof effect of the damp-proof terminal box is effectively improved.

Description

technical field [0001] The invention relates to a terminal box. Background technique [0002] As is known, the terminal box mainly includes a box body, a top cover arranged on the top of the box body, a terminal bracket arranged in the box body, and a connecting terminal arranged on the terminal bracket. Under degraded conditions, especially in the rainy season, the inside of the box is prone to moisture, condensation and water accumulation. The box is damp, which will rust the terminal row screws and connecting pieces, make the secondary terminals poor contact, and cause the current circuit terminals to heat up or even open. , resulting in protection refusal or misoperation, causing accidents; the transformer voltage caused by moisture and the poor contact of switch and temperature signal terminals will cause abnormal operation of measurement and control and protection devices, and false signals, resulting in misjudgments by operators and wrong analysis. Aiming at the abov...

AI Technical Summary

Problems solved by technology

[0002] As is known, the terminal box mainly includes a box body, a top cover arranged on the top of the box body, a terminal bracket arranged in the box body, and a connecting terminal arranged on the terminal bracket. Under degraded conditions, especially in the rainy season, the inside of the box is prone to moisture, condensation and water accumulation. The box is damp, which will rust the terminal row screws and connecting pieces, make the secondary terminals poor contact, and cause the current circuit terminals to heat up or even open. , resulting in protection refusal or misoperation, causing accidents; the transformer voltage caused by moisture and the poor contact of the switch and temperature signal terminals will cause abnormal operation of the measurement and control and protection devices, and false signals, resulting in misjudgments by operators and wrong analysis

Aiming at the above problems, there are various moisture-proof solutions on the market, such as the moisture-proof terminal box disclosed in the patent No. 200820199458.4, which is arranged at the air inlet through the air inlet, the exhaust hole, the exhaust fan, and the drying box for storing the desiccant. The heater and temperature sensor realize the moisture-proof of the terminal box, but it ignores the sealing requirements of the terminal box while preventing moisture. The exhaust hole and the air inlet hole increase the way for moisture to enter the terminal box, especially in humid thunderstorm weather , increasing the burden on moisture-proof equipment such as drying ovens, exhaust fans, and heaters

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