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Outdoor electrical equipment box, moisture-proof isobaric isolator and method

A technology for electrical equipment boxes and electrical equipment, which is applied to electrical components, substation/distribution device enclosures, substation/switch layout details, etc. or the effect of stagnant water

Pending Publication Date: 2022-01-04
任宏才
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the environment with high air humidity and heavy rain in the south, when the air pressure inside the box is less affected by the temperature difference between day and night than the pressure outside the box, moist air and rain will flow from the gap between the box cover and the box body. Entering the inside of the box, repeated cycles will cause a large amount of water to accumulate in the box

Method used

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  • Outdoor electrical equipment box, moisture-proof isobaric isolator and method
  • Outdoor electrical equipment box, moisture-proof isobaric isolator and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] Example: see figure 1 and figure 2 ;In the figure, 1-breathing valve, 2-stretching chamber, 3-two-way ventilation valve, 4-one-way ventilation valve, 5-housing, 6-inner air chamber, 7-outer air chamber; A-box, B -Isolator.

[0018] The outdoor electrical equipment box, the moisture-proof isobaric isolator and the method thereof include a casing, a telescoping cavity and a two-way vent valve, the telescoping cavity is set in the casing in a sealed state, and the casing is divided into an inner air chamber and an outer air chamber, The external air chamber communicates with the outside atmosphere through the two-way vent valve that runs through the shell and the telescopic cavity, the internal air chamber communicates with the electrical equipment box through the breathing valve that runs through the shell, and the telescopic cavity communicates with the outside atmosphere through the two-way vent valve that runs through the shell. Connected; by installing a moisture-p...

Embodiment 1

[0021] One or at least two telescopic chambers 2 (the telescopic chambers 2 are air bags, isolation membranes, isolation pistons or filter materials) are set in the sealed housing 5, and separate the housing 5 into an internal air chamber 6 and an external air chamber. Chamber 7, the external air chamber 7 communicates with the outside atmosphere through the two-way vent valve 3 that penetrates the housing 5 and the telescopic chamber 2, the internal air chamber 6 communicates with the electrical equipment box through the breathing valve 1 that penetrates the housing 5, and the telescopic chamber 2 It communicates with the outside atmosphere through the two-way vent valve 3 that runs through the housing 5 .

[0022] The casing 5 and the telescopic chamber 2 form an ingenious structure of an isobar. Through the volume change of the telescopic chamber 2, the size of the communication space in the casing 5 and the box is changed. Through the cooperation of the two, the air pressur...

Embodiment 2

[0024] This embodiment is obtained by adding technical features such as a one-way valve on the basis of the first embodiment. The rest of the technical features are the same as the first embodiment, and the similarities will not be repeated here. The detailed description of the added technical features is as follows: The internal air chamber 6 also communicates with the outside atmosphere through the one-way vent valve 4 penetrating through the housing 5 .

[0025] The housing 5 is provided with a one-way ventilation valve 4 communicating with the outside air. By opening the one-way ventilation valve 4, the air in the housing 5 can be discharged or entered in extreme cases to prevent equipment from being damaged. Simultaneously, the housing 5 communicates with the box through the two-way ventilation valve 3, so as to minimize the outside air entering from the one-way ventilation valve 4 from entering the box.

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PUM

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Abstract

The invention discloses an outdoor electrical equipment box, a moisture-proof isobaric isolator and a method. The box comprises a shell, a telescopic cavity and a two-way vent valve; the telescopic cavity is arranged in the sealed shell and divides the interior of the shell into an internal air chamber and an external air chamber, the external air chamber is communicated with the external atmosphere through the two-way vent valve penetrating through the shell and the telescopic cavity, the internal air chamber is communicated with the electrical equipment box through a breather valve penetrating through the shell, and the telescopic cavity is communicated with the outside atmosphere through a two-way vent valve penetrating through the shell. The isolator communicated with an existing box is installed on the basis of the existing box, under the cooperation of the shell, the telescopic cavity and the two-way vent valve in the isolator, an internal air chamber formed by the box body and the shell is isolated from an external air chamber formed by the telescopic cavity, and the size of the internal air chamber is adjusted by adjusting the size of the telescopic cavity; the internal air chamber and the outside air pressure are kept balanced, water vapor in the outside air is prevented from entering the box, and the problem of water accumulation in the box is solved.

Description

Technical field: [0001] The invention relates to the electrical field, in particular to a moisture-proof isobaric isolator for an outdoor electrical equipment box. Background technique: [0002] The railway outdoor electrical equipment box is an important component that provides safety protection for electrical equipment, and can effectively protect electrical equipment from dust and rain erosion. The seal between the box body and the box cover is very tight, and it is difficult for the box to have water ingress at a depth of 5 meters, but in practical applications, especially in areas with a lot of rain, high air humidity, and large temperature differences between day and night The phenomenon of a large amount of water in the box has plagued us for many years and has not been effectively resolved so far. After long-term experience accumulation and thinking, and through a large number of tests, the root cause of water ingress in a well-sealed box is obtained: the air in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B1/28H02B1/56H02B1/46H02B1/48
CPCH02B1/28H02B1/565H02B1/46H02B1/48
Inventor 任宏才汤国军
Owner 任宏才
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