Non-glue mechanical sealing structure of fiber grating osmometer

Abstract

The present invention aims at overcoming the problems that poor stability, poor sealing effect and affected osmometer precision can be caused by adoption of a waterproof glue for sealing a fiber grating osmometer in the prior art, and provides a non-glue mechanical sealing structure of a fiber grating osmometer. The non-glue mechanical sealing structure is characterized in that the traditional waterproof glue is replaced by nylon tubes, pressure-resistant fast screwed joints and a heat shrinkable tube for sealing the fiber grating osmometer, and a support effect is achieved through a metal support tube. Due to special material thereof, the nylon tube can be resistant to 10Mpa pressure without serious deformation, thus the nylon tube is used as a protection sleeve of an optical fiber; the pressure-resistant fast screwed joint can achieve the sealing effect by extruding the nylon tube; the heat shrinkable tube is used for butt joint of an optical cable and the nylon tube, and achieves firm and reliable effects; and a hydraulic tong is used for extruding the metal support tube to achieve the sealing effect. The non-glue mechanical sealing structure of the present invention can solve the defects of poor long-term stability, and small pressure-resistant range of the sealing mode of a current sealant.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, and in particular relates to a glue-free pure mechanical sealing structure of an optical fiber grating piezometer. Background technique [0002] Piezometers are mainly used for long-term measurement of pressure in fluids, pores, dams, subways, bridges, etc. Nowadays, most of them use traditional electric piezometers. Traditional electric piezometers have disadvantages such as low measurement accuracy, poor waterproof performance, short life, and poor anti-electromagnetic interference ability; fiber grating piezometers can overcome traditional electric piezometers. The shortcomings of the piezometer have many advantages such as high measurement accuracy, large measurement range, high waterproof performance, and anti-electromagnetic interference. However, the optical grating osmometers on the market use waterproof glue to increase water resistance. Because the waterproof glue is measured for a...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problem that the optical fiber grating osmometer uses waterproof glue to seal the poor stability, poor sealing effect and affect the precision of the osmometer in the prior art, and provides a fiber grating osmometer Non-adhesive mechanical seal structure

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