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A glue-free mechanical seal structure of fiber grating piezometer

A fiber grating and sealing structure technology, applied in the direction of fluid pressure measurement using optical methods, can solve the problems of poor sealing stability, poor sealing effect, affecting the precision of piezometer, etc., and achieve the effect of protecting and sealing

Active Publication Date: 2018-03-09
JILIN UNIV
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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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  • A glue-free mechanical seal structure of fiber grating piezometer

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Embodiment Construction

[0014] The present invention is described in detail below in conjunction with accompanying drawing:

[0015] A fiber grating piezometer adhesive-free mechanical seal structure, including a fiber grating piezometer 4 composed of a fiber grating, characterized in that a pressure-resistant quick-twist one-way joint 1 and the fiber grating piezometer 4 are butted through threads, The other end of the pressure-resistant quick-twist one-way joint 1 is a threaded nut structure, and one end of the first segment of nylon tube 10 is sealed and installed on the pressure-resistant quick-twist one-way joint 1 through the threaded nut structure of the pressure-resistant quick-tighten one-way joint 1 At the other end, the optical fiber 11 protruding from the fiber grating piezometer 4 passes through the pressure-resistant quick-twist one-way joint, and the optical fiber fusion splice 9 is placed in the first section of nylon tube 10, and the other end of the first section of nylon tube 10 is ...

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Abstract

The present invention aims at overcoming the problems in the prior art that fiber grating piezometers use waterproof glue to seal with poor stability, poor sealing effect and affecting the precision of piezometers, and provides a glue-free mechanical seal for fiber grating piezometers The structure uses nylon tubes, pressure-resistant quick-twist joints, and heat-shrinkable tubes instead of traditional waterproof glue to seal the fiber grating piezometer, and supports it through metal support tubes. Because of its special material, the nylon tube can withstand the pressure of 10Mpa without serious deformation, so it is used as the protective sleeve of the optical fiber; the pressure-resistant quick-twist connector can be squeezed through the nylon tube to achieve the sealing effect; the heat-shrinkable tube is used It is firm and reliable for the connection between optical cable and nylon tube; hydraulic pliers are used to squeeze the metal support tube to achieve the sealing effect. The invention can solve the shortcomings of poor long-term stability and small pressure-resistant range of the existing sealant sealing mode through the mechanical sealing structure.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L11/02
Inventor 张天瑜林君张义鑫
Owner JILIN UNIV
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