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CN-224202633-U - Optical fiber pressure sensor device

CN224202633UCN 224202633 UCN224202633 UCN 224202633UCN-224202633-U

Abstract

The utility model discloses an optical fiber pressure sensor device, which comprises a shell, a connecting pipe, an optical fiber sensor and a pressure guide packaging assembly, wherein a first through hole and a second through hole which are communicated with each other are formed in the shell, two ends of the connecting pipe are respectively connected with a first clamping sealing assembly, one end of the connecting pipe is sleeved outside one end of the shell and is used for sealing and detachably and fixedly connecting the two through the first clamping sealing assembly, the other end of the connecting pipe is used for sealing and detachably and fixedly connecting the first clamping sealing assembly and an optical fiber, and the pressure guide packaging assembly is sleeved outside the other end of the shell and is used for sealing and detachably and fixedly connecting the first clamping sealing assembly and the second clamping sealing assembly.

Inventors

  • HE XIANGGE
  • ZHANG MIN
  • LU HAILONG
  • YANG HENGYONG

Assignees

  • 北京大学

Dates

Publication Date
20260505
Application Date
20250610

Claims (8)

  1. 1. The utility model provides an optical fiber pressure sensor device, its characterized in that, includes shell, connecting pipe, optical fiber sensor and pressure guiding encapsulation subassembly, the inside of shell is equipped with first through-hole and the second through-hole of mutual intercommunication, and the diameter of first through-hole is less than the diameter of second through-hole, optical fiber sensor installs in the second through-hole, be arranged in the first through-hole through the heart yearn in the optic fibre of being connected with optical fiber sensor, the both ends of connecting pipe are connected with first joint seal assembly respectively, the one end cover of connecting pipe is established the outside of shell one end is sealed and can dismantle fixed connection with between the two through first joint seal assembly, be used for letting in optic fibre in the connecting pipe, the other end of connecting pipe seals and can dismantle fixed connection between first joint seal assembly and the optic fibre, pressure guiding encapsulation subassembly cover is established outside the other end of shell and seal and can dismantle fixed connection with between the two through second joint seal assembly, the end of optical fiber sensor extends to pressure guiding encapsulation subassembly inside.
  2. 2. The optical fiber pressure sensor device according to claim 1, wherein the pressure guiding packaging assembly comprises a pressure cylinder, a middle cylinder and a clamping sleeve member, one end of the pressure cylinder is sleeved at one end of the middle cylinder and is detachably and fixedly connected with the middle cylinder, the other end of the middle cylinder is sleeved on the clamping sleeve member and is detachably and fixedly connected with the clamping sleeve member, the clamping sleeve member is sleeved on the other end of the shell and is used for sealing and detachably and fixedly connected with the clamping sleeve member through the second clamping sealing assembly, the shell extends into the middle cylinder, and the detection end of the optical fiber pressure sensor extends into the pressure cylinder.
  3. 3. The optical fiber pressure sensor device according to claim 2, wherein one end of the pressure cylinder is in threaded connection with one end of the middle cylinder, and auxiliary fixation is performed between the pressure cylinder and the middle cylinder through a set screw, and the center line of the set screw is perpendicular to the center line of the pressure cylinder.
  4. 4. The fiber optic pressure sensor device of claim 2, wherein the ferrule comprises a ferrule body, one end of the ferrule body is integrally formed with a first connection end, the first connection end is connected with a second clamping seal assembly to realize detachable fixed sealing connection with the housing, the other end of the ferrule body is integrally formed with a second connection end, the other end of the intermediate barrel is sleeved on the second connection end and is in threaded connection with the second connection end, and a sealing ring is arranged between the ferrule body and the intermediate barrel.
  5. 5. The optical fiber pressure sensor device according to claim 2, wherein the end of the pressure cylinder away from the housing is in a closed state, and a plurality of pressure guide holes are formed in the outer side wall of the pressure cylinder.
  6. 6. The optical fiber pressure sensor device according to claim 1, wherein the first clamping and sealing assembly comprises a nut, a first clamping sleeve seat and a second clamping sleeve seat, wherein the nut is sleeved at the end part of the connecting pipe and is in threaded connection with the connecting pipe, the first clamping sleeve seat and the second clamping sleeve seat are sequentially arranged between the nut and the end part of the connecting pipe along the direction away from the shell and are sleeved on the corresponding optical fiber or the corresponding shell, when the nut is in a connection state with the end part of the connecting pipe, the second clamping sleeve seat and the first clamping sleeve seat are extruded by the nut to seal with the corresponding connecting pipe, the optical fiber or the corresponding shell in a clasping manner, and the detachable fixed connection between the connecting pipe and the optical fiber or the corresponding shell is realized in the clasping manner under the cooperation of the nut.
  7. 7. The optical fiber pressure sensor device according to claim 6, wherein the first ferrule holder has a conical structure, a conical hole and a third through hole which are mutually communicated are formed in the first ferrule holder, the second ferrule holder has a cylindrical structure, a fourth through hole is formed in the second ferrule holder, an outer wall surface of one end of the second ferrule holder is set to be a conical surface matched with the conical hole, and a conical surface matched with the conical surface of the first ferrule holder is formed in an inner wall of an end portion of the connecting pipe.
  8. 8. The optical fiber pressure sensor device according to claim 7, wherein the second clamping seal assembly has the same structure as the first clamping seal assembly, a nut in the second clamping seal assembly is in threaded connection with the first connecting end, a conical surface matched with a conical surface of the first clamping sleeve seat is arranged on the inner wall of the first connecting end, when the nut is in a connection state with the first connecting end, the second clamping sleeve seat and the first clamping sleeve seat are extruded to seal with the corresponding first connecting end and the corresponding shell in a clasping manner, and detachable fixed connection between the first connecting end and the corresponding shell is realized in a clasping manner under the cooperation of the nut.

Description

Optical fiber pressure sensor device Technical Field The utility model relates to the technical field of optical fiber sensing, in particular to an optical fiber pressure sensor device. Background The optical fiber pressure sensor is used as a key component in the fields of industrial production, scientific research, engineering monitoring and the like, and has obvious advantages in special environment application. Compared with the limitations of the traditional electrical pressure sensor in severe environments such as strong electromagnetic interference, inflammability, explosiveness, high temperature, high pressure, long-distance monitoring and the like, the optical fiber pressure sensor has become an ideal choice in the special scenes by virtue of the characteristics of electromagnetic interference resistance, intrinsic safety, corrosion resistance, high temperature resistance, small volume, light weight, suitability for networking, long-distance transmission and the like. Currently, optical fiber pressure sensors based on the principles of Fiber Bragg Gratings (FBGs), fabry-perot (FP) interferometers, microbending losses, and the like have been widely used. However, the practical application effect is not only dependent on the performance of the core sensing element, but also closely related to the packaging structure, the optical fiber connection mode, the pressure-resistant sealing design and the overall mechanical strength. The existing optical fiber sensor still has the problems of insufficient pressure resistance, difficult field packaging connection and low sealing reliability in structural design, so that the application of the optical fiber sensor in specific scenes such as deep sea, oil wells and the like is limited. Accordingly, a new fiber optic pressure sensor device is urgently needed to solve the above-mentioned technical problems. Disclosure of utility model The utility model aims to solve the technical problems that the existing optical fiber sensor still has insufficient pressure resistance, difficult field packaging connection and low sealing reliability in structural design, and the application of the optical fiber sensor in specific scenes such as deep sea, oil wells and the like is limited. The utility model provides an optical fiber pressure sensor device, which comprises a shell, a connecting pipe, an optical fiber sensor and a pressure guiding packaging assembly, wherein a first through hole and a second through hole which are communicated with each other are formed in the shell, the diameter of the first through hole is smaller than that of the second through hole, the optical fiber sensor is installed in the second through hole, a core wire in an optical fiber connected with the optical fiber sensor is used in the first through hole, two ends of the connecting pipe are respectively connected with a first clamping sealing assembly, one end of the connecting pipe is sleeved outside one end of the shell and is used for sealing and detachably and fixedly connecting the two through the first clamping sealing assembly, the other end of the connecting pipe is used for introducing an optical fiber, the pressure guiding packaging assembly is sleeved outside the other end of the shell and is used for sealing and detachably and fixedly connecting the two through the second clamping sealing assembly, and the tail end of the optical fiber sensor extends into the pressure guiding packaging assembly. In a specific embodiment of the optical fiber pressure sensor device, the pressure guiding packaging assembly comprises a pressure cylinder, a middle cylinder and a clamping sleeve member, one end of the pressure cylinder is sleeved at one end of the middle cylinder and is detachably and fixedly connected with the middle cylinder, the other end of the middle cylinder is sleeved on the clamping sleeve member and is detachably and fixedly connected with the clamping sleeve member, the clamping sleeve member is sleeved at the other end of the housing and is used for sealing and detachably and fixedly connected with the second clamping sealing assembly, the housing extends into the middle cylinder, and the detection end of the optical fiber pressure sensor extends into the pressure cylinder. In a specific embodiment of the optical fiber pressure sensor device, one end of the pressure cylinder is in threaded connection with one end of the middle cylinder, the pressure cylinder and the middle cylinder are fixed in an auxiliary mode through a set screw, and the center line of the set screw is perpendicular to the center line of the pressure cylinder. In a specific embodiment of the optical fiber pressure sensor device, the clamping sleeve piece comprises a clamping sleeve body, a first connecting end part is integrally formed at one end of the clamping sleeve body, the first connecting end part is connected with the second clamping seal assembly to realize detachable fixed sealing connection with the s