Safe inflation device

Abstract

The invention provides a safe inflation device. The safety inflation device can be used for periodically inflating dry nitrogen into an optical cavity with a large optical window for drying and pressure maintaining, and is simple in structure, low in cost and high in safety performance. According to the technical scheme, the safe inflation device comprises a pressure reducer, a three-way valve, a safety valve and an anti-twist air tap, wherein an air inlet of the pressure reducer is connected with an air source; an air outlet is connected with the air inlet of the three-way valve through a high-pressure pipe; two air outlets are formed in the three-way valve, one air outlet is provided with a small-range pressure gauge, and the other air outlet is connected with the air inlet of the safety valve; the air outlet of the safety valve is connected with the anti-twist air tap through a low-pressure pipe; the anti-twist air tap is used for being connected with an inflation inlet of the optical cavity; and an air pressure adjusting device is arranged in the safety valve and can release pressure of high-pressure air passing through the safety valve.

Description

technical field [0001] The invention relates to the field of air-inflating drying and pressure-holding devices for optical cavities in optoelectronic equipment, in particular to a safety inflating device. Background technique [0002] Various photoelectric sensors and optical components are installed inside the optical cavity of the optoelectronic device. In order to avoid fogging, mildew and corrosion on the surface of optical components, and improve the life of optical components and the reliability of optoelectronic equipment, it is often necessary to seal the optical cavity and periodically fill it with dry nitrogen for drying and pressure maintenance. [0003] Limited by the optical window, especially the large optical window and the structural strength of the cavity, the pressure that the optical cavity of the optoelectronic device can withstand usually does not exceed 0.1Mpa, and the safe inflation pressure is usually between 0.005MPa and 0.03MPa. The nitrogen gas so...

AI Technical Summary

Problems solved by technology

Since the spring force is not sensitive to the change of the distance, the sensitivity is low, and the opening pressure is relatively large, often above 0.5MPa

At the same time, since the spring force is proportional to the opening degree of the overflow valve, the greater the opening degree, the greater the internal pressure of the valve core, the exhaust speed is limited, the pressure drop is small, and the pressure in the air circuit cannot be quickly released. significantly reduced to within the safe range

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