CN210108383U - Water pressure resistant single-core optical cable connection protection device of fiber bragg grating sensor - Google Patents
Water pressure resistant single-core optical cable connection protection device of fiber bragg grating sensor Download PDFInfo
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- CN210108383U CN210108383U CN201921224989.9U CN201921224989U CN210108383U CN 210108383 U CN210108383 U CN 210108383U CN 201921224989 U CN201921224989 U CN 201921224989U CN 210108383 U CN210108383 U CN 210108383U
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- fiber grating
- water pressure
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- 239000000835 fiber Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 title claims abstract description 14
- 239000003292 glue Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims description 14
- 230000004927 fusion Effects 0.000 abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 6
- 239000010935 stainless steel Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000007526 fusion splicing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a water pressure resistant fiber grating sensor single core optical cable protection device that continues, including two protection sections, two protection sections all include encapsulating chamber and protection chamber, connect through the linkage segment between encapsulating chamber and the protection chamber, all have the through-hole that supplies the tail cable to pass in encapsulating chamber, protection chamber, the linkage segment, and the linkage segment inner wall is provided with only glues the ring, only glues ring internal diameter and tail cable oversheath external diameter phase-match, and the one end that protection chamber was kept away from in the encapsulating chamber in two protection sections is used for passing through threaded connection. The utility model discloses a stainless steel material protection device embolias fiber grating instrument tail cable butt fusion section wherein, increases the intensity of butt fusion section. Two protection sections pass through threaded connection, and O type circle stagnant water is passed through to the junction, and sealed glue is injected into at the protection device both ends, when fixed with the tail cable, has guaranteed protection device's waterproof sealing nature, possesses certain waterproof withstand voltage function, effectively protects fiber grating instrument tail cable butt fusion section, is applicable to multiple engineering environment, improves instrument service life.
Description
Technical Field
The utility model belongs to the technical field of geotechnical engineering safety monitoring device, a fiber grating instrument connection protection device is related to, and more specifically the utility model relates to a single core optical cable protection device that continues of water pressure resistant fiber grating sensor.
Background
The fiber grating instrument is used as a novel sensor and widely applied to safety monitoring of building structures such as geotechnical engineering, bridges, highways and the like. Because of the advantages of long signal transmission distance, strong anti-electromagnetic interference capability and the like, the fiber grating instrument has become the first choice instrument for safety monitoring of high-water-head and long-distance hydraulic tunnels and reservoir dam structures.
In the use process of the fiber bragg grating instrument, the sensor 1 and the observation end 2 need to be connected through a single-core tail cable 3, and the structure of the fiber bragg grating instrument is shown in figure 1. The single-core pigtail cable 3 is configured as shown in fig. 2, and includes a pigtail cable protective sheath 301, an optical fiber cladding 302, and an optical fiber 303 from outside to inside. The optical fiber used by the fiber grating instrument is a single-mode optical fiber, the essence of the optical fiber is glass fiber with the diameter of 8-10 mu m, and in the actual engineering application, the tail cable of the instrument is easy to be damaged, so that the sensor fails. The splicing of the instrument tail cable needs to be carried out, the schematic diagram is shown in fig. 3, a stainless steel reinforcing needle 5 is used for reinforcing at a welding point 4, and a heat-shrinkable sleeve 6 is sleeved outside the welding point 4 for protection.
After fusion splicing, a weak link for protecting the optical fiber is formed between the two sections of the tail cables, so that the optical fiber is easily broken again, and the section needs to be protected. The light depends on the current reinforced needle and the sleeve for fixing, and the waterproof and pressure-resistant effects are poor. The fiber grating instrument is mostly used in a high-water head pressure environment, and hydrogen ions ionized from a water body can cause chapping of the surface of the optical fiber and influence the service life of the sensor, so the protection device needs to have a certain waterproof and pressure-resistant function.
Disclosure of Invention
In order to solve the problem, the utility model discloses a single core tail cable butt fusion protection device of fiber grating instrument has good waterproof pressure resistance.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a water pressure resistant fiber grating sensor single core optical cable protection device that continues, includes two protection sections, and two protection sections all include encapsulating chamber and protection chamber, connect through the linkage segment between encapsulating chamber and the protection chamber, all have the through-hole that supplies the tail cable to pass in encapsulating chamber, protection chamber, the linkage segment, and the linkage segment inner wall is provided with only glues the ring, only glues ring internal diameter and tail cable oversheath external diameter phase-match, and the one end that the protection chamber was kept away from in the encapsulating chamber in two protection sections is used for through threaded connection.
Furthermore, a sealing ring is arranged at the joint of the two protection sections.
Furthermore, the inner diameter of the through hole in the connecting section is smaller than the inner diameters of the through holes of the glue filling cavity and the main body part of the protection cavity.
Furthermore, one end of the glue filling cavity close to the connecting section and one end of the protection cavity close to the connecting section are both funnel-shaped.
Furthermore, one end of the protection cavity, which is far away from the glue filling cavity, in one of the protection sections is provided with an external thread, and one end of the protection cavity, which is far away from the glue filling cavity, in the other protection section is provided with an internal thread.
Furthermore, a hexagonal flange plate is arranged on the outer wall of the joint of the two protection sections.
Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:
1. the utility model provides a water pressure resistant fiber grating sensor single core optical cable protection device that continues adopts stainless steel to embolia fiber grating instrument tail cable butt fusion section wherein, increases the intensity of butt fusion section. Two protection sections pass through threaded connection, and O type circle stagnant water is passed through to the junction, and sealed glue is injected into at the protection device both ends, when fixed with the tail cable, has guaranteed protection device's waterproof sealing nature, possesses certain waterproof withstand voltage function, effectively protects fiber grating instrument tail cable butt fusion section, is applicable to multiple engineering environment, improves instrument service life.
2. The protective device is reliably connected with the tail cable through sealant, so that the tensile strength of the tail cable is ensured; stop gluey ring and its dimensional design can prevent to seal gluey entering protection chamber, make optic fibre leave certain movable allowance to when preventing that external force from dragging the tail cable, break optic fibre, reduce the damage risk.
Drawings
Fig. 1 is a schematic structural diagram of a fiber grating sensor.
Fig. 2 is a schematic view of a tail cable structure.
FIG. 3 is a schematic diagram of the fusion splicing of the fiber grating instrument pigtail cable.
Fig. 4 is a partial sectional view of the overall structure of the protector.
Fig. 5 is a partial sectional view of the protector in its entirety assembled.
Fig. 6 is a schematic view of the protector assembly.
Description of reference numerals:
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and embodiments, which are to be understood as illustrative only and not limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The utility model provides a water pressure resistant fiber grating sensor single core optical cable protection device that continues, as shown in fig. 4, fig. 5, wholly be stainless steel material, adopt two segmentation structures, specifically include protection section A, protection section B, A, B passes through threaded connection for two sections, and O type circle 12 stagnant water is used to the junction.
Specifically, the protection section A and the protection section B are basically the same in structure and are symmetrically arranged. The protection section A comprises a glue filling cavity 7 and a protection cavity 8, the glue filling cavity 7 and the protection cavity 8 are connected through a connecting section 9, and through holes for tail cables to pass through are formed in the glue filling cavity 7, the protection cavity 8 and the connecting section 9. The diameter of the connecting section is smaller than the diameters of the main body parts of the glue filling cavity and the protection cavity, and is particularly characterized in that one end, close to the connecting section, of the glue filling cavity forms a funnel shape from large to small (from left to right in fig. 4), and one end, close to the connecting section, of the protection cavity also forms a funnel shape from small to large (from left to right in fig. 4), so that the diameter of the through hole of the connecting section 9 is smaller than the diameter of the through hole of the main body parts in the glue filling cavity and the protection cavity. And the inner wall of the connecting section is provided with a glue stopping ring 13, the outer diameter of the glue stopping ring is the same as the inner diameter of the connecting section, the inner diameter of the glue stopping ring is consistent with the outer diameter of the outer sheath of the tail cable, and glue can be prevented from entering the protection cavity after glue pouring. The one end that the chamber was kept away from to encapsulating in protection section A's protection chamber is provided with external screw thread 10, and the one end that the chamber was kept away from to encapsulating in protection section B's protection chamber is provided with internal thread 11, through inside and outside screw thread setting, protection section A and protection section B accessible threaded connection. The structure of protection section B is similar with protection section A structure, and the difference only lies in that two protection sections set up the external screw thread one, and one sets up the internal thread, and the connection of being convenient for also can set up the internal thread on protection section A as required, sets up the external screw thread on the protection section B.
In order to facilitate the connection of the two protection sections, the hexagonal flange 14 is arranged at the threaded connection position of the two sections of the protection section A, B, so that the screwing assembly is facilitated.
The utility model provides a water pressure resistant fiber grating sensor single core optical cable protection device's installation goes on according to following step:
1. respectively penetrating 2 single-core tail cables to be connected into a protection section A and a protection section B of the protection device;
2. carrying out welding operation on the tail cable, reinforcing the welding point 4 by using a stainless steel reinforcing needle 5, and sleeving a heat-shrinkable sleeve 6 outside the welding point 4 for protection;
3. connecting the protection section A and the protection section B through threads, and fastening the threads through a hexagonal flange plate by using a wrench;
4. filling glue into two ends of the protection device until the sealant is flush with the two ports;
5. and pulling the tail cable to test whether the connection is firm or not after the sealant is solidified.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (6)
1. The utility model provides a water pressure resistant fiber grating sensor single core optical cable protection device that continues which characterized in that: including two protection sections, two protection sections all include encapsulating chamber and protection chamber, connect through the linkage segment between encapsulating chamber and the protection chamber, all have the through-hole that supplies the tail cable to pass in encapsulating chamber, protection chamber, the linkage segment, and the linkage segment inner wall is provided with only glues the ring, only glues ring internal diameter and tail cable oversheath external diameter phase-match, and the one end that the protection chamber was kept away from in the encapsulating chamber in two protection sections is used for through threaded connection.
2. The water pressure resistant optical fiber grating sensor single-core optical cable splicing protection device according to claim 1, characterized in that: and a sealing ring is arranged at the joint of the two protection sections.
3. The water pressure resistant optical fiber grating sensor single-core optical cable splicing protection device according to claim 1, characterized in that: the inner diameter of the through hole in the connecting section is smaller than the inner diameters of the through holes of the glue filling cavity and the main body part of the protection cavity.
4. The water pressure resistant optical fiber grating sensor single-core optical cable splicing protection device according to claim 1 or 3, characterized in that: one end of the glue filling cavity close to the connecting section and one end of the protection cavity close to the connecting section are funnel-shaped.
5. The water pressure resistant optical fiber grating sensor single-core optical cable splicing protection device according to claim 1, characterized in that: one end of the protection cavity, which is far away from the glue filling cavity, in one of the protection sections is provided with an external thread, and one end of the protection cavity, which is far away from the glue filling cavity, in the other protection section is provided with an internal thread.
6. The water pressure resistant optical fiber grating sensor single-core optical cable splicing protection device according to claim 1, characterized in that: the outer wall of the joint of the two protection sections is provided with a hexagonal flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224989.9U CN210108383U (en) | 2019-07-31 | 2019-07-31 | Water pressure resistant single-core optical cable connection protection device of fiber bragg grating sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224989.9U CN210108383U (en) | 2019-07-31 | 2019-07-31 | Water pressure resistant single-core optical cable connection protection device of fiber bragg grating sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210108383U true CN210108383U (en) | 2020-02-21 |
Family
ID=69567368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921224989.9U Active CN210108383U (en) | 2019-07-31 | 2019-07-31 | Water pressure resistant single-core optical cable connection protection device of fiber bragg grating sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210108383U (en) |
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2019
- 2019-07-31 CN CN201921224989.9U patent/CN210108383U/en active Active
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