Air sealing device and theodolite

Abstract

The invention provides an air sealing device, which includes a sealing base, a guide seat, a sealing gland, a sealing tongue ring and an elastic component, and the sealing tongue ring can be moved along the through hole of the sealing gland The axial movement of the through hole of the sealing gland, the axial movement of the guide seat can drive the sealing tongue ring to move axially in the through hole of the sealing gland; the second bottom plate is provided with a second A bottom plate through hole, the sealing tongue ring is provided with a sealing tongue ring through hole corresponding to the second bottom plate, and the sealing tongue ring through hole communicates with the cavity. The air sealing device provided by the invention has remarkable sealing effect, high reliability and can meet the production requirements for shaping.

Description

technical field [0001] The invention relates to the field of sealing of optical systems, in particular to an air sealing device. Background technique [0002] Theodolite is an optical measuring device that can automatically track the trajectory of the target, and record the angle change value and image information of the target relative to the measurement reference. Theodolite is mainly composed of tracking frame, main telescopic system, small optical system and other parts. Theodolite mostly adopts Newtonian optical structure, and the light entering the main telescopic system is refracted by the primary mirror and secondary mirror and enters the small optical system. The small optical system includes various optomechanical components and camera components, and is installed above the main telescopic system through the bottom plate. Due to the requirements of light transmission, power supply and signal line routing, the small optical system and the tracking frame need to be...

AI Technical Summary

Problems solved by technology

This solution has the following disadvantages: First, because the seal is elastic, it is easy to loosen by thread compression, and the reliability is poor; second, when there is a certain angle between the first bottom plate and the upper surface of the main telescopic system, the sealing tongue ring will be damaged. The inner sealing ring is deformed unevenly, which affects the sealing effect; the third is that when the sealing tongue ring rotates close to the main telescopic system, the O-ring sealing ring installed in the annular sealing groove may be deformed under the action of tangential force or even detachment, causing the sealing device to fail; the fourth is to use optical fiber transmission technology to transmit signals in the latest technology of theodolite. The optical fiber is characterized by fast transmission speed and high efficiency, but the optical cable used is relatively fragile. its damaged

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