Sealed drying device for photoelectric mechanism

Abstract

A sealed drying device for a photoelectric mechanism, comprising a container, an outer bushing, an inner bushing, a cover and a transparent observation plate; one end of the container is open; the outer bushing is arranged in the opening of the container and connected to the container Sealed connection, the outer bushing includes a first end with a first through hole communicating with the inside of the container and the outer bushing and a second end with a second through hole; the inner bushing is opened from the first through hole The two through holes are installed in the outer bushing and are sealed and movably connected with the outer bushing. The inner bushing contains desiccant and has a perforation connecting the inside of the outer bushing with the inside of the inner bushing. The transparent observation plate is arranged on the cover body and the cover body is sealed and connected to the inner sleeve; the inner sleeve can move close to or away from the first through hole to close or open the first through hole. Not only is it convenient to observe the state of the desiccant, but also the interior of the container can be isolated through the inner liner, which will not cause nitrogen leakage or internal pollution inside the container when the desiccant is replaced.

Description

technical field [0001] The invention relates to the technical field of photoelectric measurement and control, in particular to a sealing and drying device of a photoelectric mechanism. Background technique [0002] In the photoelectric mechanism (that is, the photomechanical system), in order to protect the photomechanical system from environmental erosion, it is often placed in a sealed structure, especially the infrared optical system used or installed at sea or near the sea, in order to prevent moisture, salt spray For the erosion of infrared lens and mechanical structure, the infrared optical system is usually placed in a nitrogen sealed container with a pressure of 1.1 atmospheres, and a drier containing a desiccant is placed inside the sealed container. This method cannot know whether the desiccant is invalid. You can only periodically open the container cover to check or replace the desiccant, so that the optical lens and mechanical structure are fully exposed to the ...

AI Technical Summary

Problems solved by technology

[0002] In the photoelectric mechanism (that is, the photomechanical system), in order to protect the photomechanical system from environmental erosion, it is often placed in a sealed structure, especially the infrared optical system used or installed at sea or near the sea, in order to prevent moisture, salt spray For the erosion of infrared lens and mechanical structure, the infrared optical system is usually placed in a nitrogen sealed container with a pressure of 1.1 atmospheres, and a drier containing a desiccant is placed inside the sealed container. This method cannot know whether the desiccant is invalid. You can only periodically open the container cover to check or replace the desiccant, so that the optical lens and mechanical structure are fully exposed to the humid air by the sea, which will damage the optical-mechanical structure. In addition, nitrogen will also leak after opening the container cover. Generally, in the use environment of photoelectric mechanisms There is no supplementary nitrogen device in the system, and it is necessary to provide a special supplementary nitrogen device or transfer the container to a site specially equipped with a supplementary nitrogen device for supplementary nitrogen, which increases the cost

The above-mentioned shortcomings are not only inconvenient to observe the state of the desiccant, but also easily cause erosion when replacing the optical-mechanical system, and the replacement cost remains high

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