Internal respiration air bag balanced type anti-explosion and anti-corrosion method and lamp of anti-explosion electric apparatus

Abstract

The invention relates to an internal respiration air bag balanced type anti-explosion and anti-corrosion method of an anti-explosion electric apparatus. A loose air bag is connected to a sealing shell so as to ensure that the internal space of the sealing shell is isolated from the external environment without pressure difference. The invention also relates to an internal respiration air bag balanced type anti-explosion and anti-corrosion lamp which comprises a lamp body and is characterized in that the sealing shell of the lamp body is connected with the loose air bag to ensure that the internal space of the sealing shell is isolated from the external environment without pressure difference. The air bag is an external air bag, the inner cavity of the external air bag is communicated with the inner cavity of the sealing shell; or the air bag is an internal air bag, and the inner cavity of the internal air bag is communicated with the external environment through a connecting pipe. The invention can realize the free respiration with the external environment without pressure difference and does not have the problem of gas or dust fog exchange in the environment; and the air bag is used as a respirator arranged in the electric apparatus and has remarkable anti-exploration and anti-corrosion property.

Description

technical field [0001] The invention relates to the field of explosion-proof electrical appliances, in particular to an anti-explosion and anti-corrosion method and a lamp of an internal breathing airbag balance type of explosion-proof electrical appliances. Background technique [0002] As we all know, during the use of lamps and lanterns, due to the thermal expansion and contraction of the gas in the lamp, respiration will occur. Every time the air rises by one degree Celsius, the volume expands by 1 / 273 of that at zero degrees Celsius. Although the temperature rise of lamps with different electric light sources is different, we have done experiments, and even cold light sources such as electronic energy-saving lamps can produce 70°C in sealed lamps. The above temperature rise will expand the air volume in the lamp by about a quarter, which is enough to blast tempered glass with a thickness of 5 mm. Therefore, a large number of general-purpose lamps are made of open type,...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the range of use is less than that of flameproof lamps, and it can only be used in Zone 2 with potentially explosive gas environments (environmental accidents rarely occur, even if they occur for a short time, so it is difficult to match the inhalation period of the lamps) Even if they overlap, the dangerous gas inhaled is not enough to cause an explosion); second, the sealing of the lamp housing is difficult, and the sealing test of the shell of the restricted breathing explosion-proof lamp requires vacuuming the inside of the shell to -3kPa, and then relying on the sealing performance of the shell itself Make it not drop to 1.5kPa within 3min, under normal circumstances, it is difficult for manufacturers to achieve

They have their own disadvantages: Restricted breathing lamps have high sealing requirements and are difficult to achieve; flameproof lamps have a large and heavy structure; increased safety lamps have complex structures and require high manufacturing technology for electrical appliances inside the lamp

But they all have a common fatal shortcoming, that is, they cannot prevent harmful gases in the environment from entering the lamp body.

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