A pipeline provided with distributed optical fiber sensors

Abstract

The application relates to a pipeline provided with a distributed optical fiber sensor, which provides a hardware basis for measuring temperature and stress data through an optical fiber sensor and can set the optical fiber on the pipeline through the following technical means. The pipeline comprises a threaded pipe, the surface of the threaded pipe is fixedly provided with a steel belt, the steel belt is spirally wound on the threaded pipe, and the threaded pipe is wound with an optical fiber; the optical fiber is implanted in the pipeline, so that transportation and construction are facilitated, a construction project specially arranged for optical fiber laying is omitted, and cost is saved. Overall pipeline comprehensive monitoring is realized, including leakage, stress and strain monitoring of the pipeline body and fault position detection. Meanwhile, the excellent characteristics of the optical fiber are embodied, that is, acid and alkali resistance, anti-interference, long service life and high precision.

Description

Technical Field

[0001] This utility model relates to the field of pipeline health monitoring technology, specifically a pipeline equipped with distributed fiber optic sensors. Background Technology

[0002] Buried pipelines operate in harsh environments, susceptible to acid and alkali corrosion and microbial attack. Existing metal detectors, inductive sensors, and capacitive sensors cannot be used long-term underground. These technologies cannot simultaneously monitor the health of the pipeline itself, such as damage or breakage. Therefore, this application provides a pipeline equipped with distributed fiber optic sensors, providing the hardware foundation for measuring temperature, stress, and other parameters via fiber optic sensors, thereby addressing the problems mentioned in the background. Utility Model Content

[0003] The purpose of this utility model is to provide a pipe equipped with distributed optical fiber sensors, which on the one hand provides a hardware foundation for measuring temperature and stress data through optical fiber sensors, and on the other hand enables the optical fiber to be installed on the pipe through the following technical means.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pipe equipped with a distributed optical fiber sensor, including a threaded pipe, a steel strip fixedly disposed on the surface of the threaded pipe, the steel strip being spirally wound around the threaded pipe, and an optical fiber being wound around the threaded pipe, the optical fiber serving as a sensor.

[0005] As a further embodiment of this utility model: the optical fiber is tightly wrapped around the steel strip, and clamps are fixedly installed at both ends of the optical fiber, with a manual knob engaged at the upper end of the clamp.

[0006] As a further improvement of this utility model, the clamp is C-shaped, and a rubber pad is laid inside the clamp.

[0007] As a further embodiment of this utility model: a large socket is fixedly installed on the left end of the threaded pipe, an mounting plate is fixedly connected to the upper end of the large socket, a rotating shaft is rotatably connected above the mounting plate, a base is rotatably connected above the rotating shaft, a fixing plate is provided above the base, a rotating shaft is rotatably connected to the rear end of the fixing plate, the bottom of the rotating shaft is rotatably connected to the base, and a bolt is engaged with the front end of the fixing plate, the bolt penetrating downward through the base.

[0008] As a further improvement of this utility model, fixing rings are fixedly installed at the left and right ends of the interior of the fixing plate.

[0009] As a further embodiment of this utility model: a small socket is fixedly installed at the right end of the threaded tube, a reinforcing rib is fixedly installed at the right end of the small socket, and a sealing ring is fixedly installed at the right end of the reinforcing rib. After the optical fiber is wound on the threaded tube, it passes through the reinforcing rib and the sealing ring on the left side. After being wound once on the threaded tube between the two sealing rings, it then passes through the reinforcing rib to the left.

[0010] Compared with existing technologies, the advantages of this invention are: fiber optic cable implantation in pipelines facilitates transportation and construction, eliminating the need for dedicated fiber optic cable laying and saving costs. It enables comprehensive monitoring of the entire pipeline, including leakage monitoring, stress and strain monitoring of the pipeline body, and fault location detection. It also demonstrates the superior characteristics of optical fibers: acid and alkali resistance, interference resistance, long lifespan, and high precision. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the threaded pipe structure in this utility model;

[0012] Figure 2 This is an enlarged structural schematic diagram of Figure A in this utility model;

[0013] Figure 3 This is an enlarged structural schematic diagram of Figure B in this utility model;

[0014] Figure 4 This is an enlarged structural schematic diagram of Figure C in this utility model;

[0015] Figure 5 This is a schematic diagram of the small socket structure of this utility model;

[0016] Figure 6 This is an enlarged structural schematic diagram of Figure D in this utility model;

[0017] Figure 7 This is a schematic diagram of the signal transmission structure in this utility model;

[0018] The correspondence between the labels and component names in the attached figures is as follows:

[0019] 1. Threaded pipe; 11. Large socket; 12. Mounting plate; 13. Rotating shaft; 14. Base; 15. Fixing plate; 16. Rotating shaft; 17. Bolt; 18. Fixing ring; 2. Small socket; 21. Reinforcing rib; 22. Sealing ring; 3. Steel strip; 31. Optical fiber; 32. Clamp; 33. Manual knob; Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0021] refer to Figure 1 This is a structural diagram of the threaded pipe 1. A large socket 11 is fixedly installed at the left end of the threaded pipe 1. An mounting plate 12 is bonded to the upper end of the large socket 11 using structural adhesive. (The mounting plate 12 is positioned to the right or left to allow sufficient space for the weld joint.) Figure 2 and Figure 6 As shown, a rotating shaft 13 is rotatably connected to the upper end of the mounting plate 12. A base 14 is rotatably connected above the rotating shaft 13. A fixing plate 15 is disposed above the base 14. The fixing plate 15 is U-shaped, with the ends of the U-shape extending to both ends. A pair of bolts 17 are disposed at the front end of the fixing plate 15, and the bolts 17 penetrate downward through the base 14. The connection between the base 14 and the bolts 17 is threaded. A rotating shaft 16 is rotatably connected to the lower rear end of the fixing plate 15. The rotating shaft 16 is rotatably connected to the base 14, allowing the fixing plate 15 to rotate on the fixing plate 15 via the rotating shaft 16. Fixing rings 18, made of elastic rubber, are fixedly installed at both the left and right ends inside the fixing plate 15. In use, several threaded tubes 1 are connected by welding. After the threaded tubes 1 are welded together, the independent cables on the several threaded tubes 1 need to be welded together. The welded cable joints are placed in the base 14, and the fixing plate 15 is rotated downwards. The U-shape of the fixing plate 15 holds and fixes the cable joints below, and at the same time protects the cable joints. The fixing rings 18 at the left and right ends of the fixing plate 15 strengthen the fixing of the cables. By rotating the bolt 17 at the front end of the fixing plate 15, the bolt 17 rotates on the internal threads of the base 14, fixing the fixing plate 15 to the base 14.

[0022] like Figure 3 Figure 5 As shown, a small socket 2 is fixedly installed on the right side of the threaded pipe 1. A circular reinforcing rib 21 is fixedly installed on the surface of the small socket 2. Two sealing rings 22 are fixedly installed at the right end of the reinforcing rib 21. A raised steel strip 3 is fixedly installed on the surface of the threaded pipe 1. The steel strip 3 is spirally wound around the threaded pipe 1. An optical fiber 31 is wound around the threaded pipe 1, and the optical fiber 31 is set tightly against the steel strip 3. Figure 4As shown, clamps 32 are installed at both ends of the threaded tube 1. The clamps 32 are bonded and fixed to the threaded tube 1 with strong adhesive. The optical fiber 31 is located at the upper end of the clamp 32 and is movably connected to the clamp 32. The clamp 32 is C-shaped, with a rubber pad inside. The two ends of the C-shape extend upwards, and a manual knob 33 is engaged at the extended positions. The manual knob 33 passes through both ends of the clamp 32, and the manual knob 33 and the clamp 32 are respectively provided with mutually mating threads. The manual knob 33 rotates through the threaded clamp 32. The right end of the optical fiber 31 passes through the reinforcing rib 21 and the sealing ring 22 at the left end. After wrapping around the small socket 2 between the two sealing rings 22, it extends to the left and passes through the reinforcing rib 21. The optical fiber 31 has a certain length for use during fusion splicing.

[0023] In this embodiment, before transportation, the optical fiber 31 can be tightly attached to the steel strip 3 and wrapped around the surface of the threaded tube 1. The raised steel strip 3 also provides some protection for the optical fiber 31. After leaving a certain length at both ends of the optical fiber 31, the optical fiber 31 is placed inside the clamp 32, and then the manual knob 33 is turned. As the manual knob 33 is turned, the clamp 32 is tightened. When the clamp 32 is tightened, it fixes the internal parts of the clamp 32 to the optical fiber 31 by compression, which can fix the optical fiber 31 to the threaded tube 1 during transportation. When the optical fiber 31 is damaged and needs to be replaced, the clamp 32 can be loosened or tightened by manually turning the knob 33 to remove the damaged optical fiber 31 for replacement. During construction, after inserting the small socket 2 on the first threaded pipe 1 into the large socket 11 on the second threaded pipe 1, the two threaded pipes 1 are fused together using a hot-melt machine. Then, the optical fiber 31 at the small socket 2 on the first threaded pipe 1 and the optical fiber 31 at the large socket 11 on the second threaded pipe 1 are connected by hot-melt. The joint of the hot-melt connection of the optical fiber 31 is placed between the fixing plate 15 and the base 14 for fixation. If the optical fiber 31 on the first threaded pipe 1 and the second threaded pipe 1 are not on the same extension line and need to be angled, the direction of the fixing plate 15 and the base 14 can be changed by the rotating shaft 13 to ensure that the two ends of the fixing plate 15 and the two ends of the optical fiber 31 can be on the same straight line when they are connected, preventing the optical fiber 31 from having a reduced service life due to long-term bending after connection. Because the optical fiber 31 is installed on the surface of the threaded pipe 1 by winding, the cross-section of the threaded pipe 1 for detection is increased, making the detection position more accurate. If the gas or liquid ejected when a certain threaded pipe 1 leaks will cause a temperature change, when this temperature change is detected by the optical fiber sensor, the optical signal collected by the optical fiber demodulator host is demodulated and converted into an electrical or digital signal that can be processed by a computer or other equipment. Then, the DTU module transmits the signal to the monitoring center. The signal from the optical fiber sensor of each pipeline is demodulated by the optical fiber demodulator host, converted into an electrical or digital signal that can be processed by a computer or other equipment, and then transmitted to the monitoring center by the DTU module. This achieves comprehensive detection of whether there is damage in each section of the pipeline. Figure 7 (As shown).

[0024] Working principle: Before transportation, the optical fiber 31 can be wrapped tightly around the surface of the threaded pipe 1 with the steel tape 3. After placing both ends of the optical fiber 31 inside the clamp 32, the clamp 32 will fix the optical fiber 31 when the manual knob 33 is turned, preventing the optical fiber 31 from falling off the threaded pipe 1 during transportation. When buried at the construction site, the small socket 2 on the first threaded pipe 1 is inserted into the large socket 11 on the second threaded pipe 1. The two threaded pipes 1 are then fused together using a heat fusion machine. The optical fiber 31 at the small socket 2 on the first threaded pipe 1 and the optical fiber 31 at the large socket 11 on the second threaded pipe 1 are connected by heat fusion. The heat-fused joint of the optical fiber 31 is placed between the fixing plate 15 and the base 14. The bolt 17 is rotated, and the bolt 17 rotates on the internal thread of the base 14, fixing the fixing plate 15 and the base 14. This also protects the fusion joint of the optical fiber 31. The subsequent pipe connection method is as shown above. When the threaded pipe 1 leaks, the fiber optic sensor wrapped around the threaded pipe 1 detects the leakage. The fiber optic demodulator host demodulates the optical signal collected by the fiber optic sensor, and the DTU module transmits the signal to the monitoring center, thereby realizing a comprehensive detection of whether there is any damage to the pipeline.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A conduit equipped with distributed optical fiber sensors, comprising a threaded pipe (1), characterized in that, A steel strip (3) is fixedly provided on the surface of the threaded tube (1). The steel strip (3) is spirally wound on the threaded tube (1). An optical fiber (31) is wound on the threaded tube (1).

2. A conduit equipped with distributed optical fiber sensors according to claim 1, characterized in that, The optical fiber (31) is wrapped tightly around the steel strip (3), and clamps (32) are fixedly installed at both ends of the optical fiber (31), and a manual knob (33) is engaged at the upper end of the clamps (32).

3. A conduit equipped with distributed optical fiber sensors according to claim 2, characterized in that, The clamp (32) is C-shaped, and a rubber pad is laid inside the clamp (32).

4. A conduit equipped with distributed optical fiber sensors according to claim 1, characterized in that, A large socket (11) is fixedly installed at the left end of the threaded pipe (1). A mounting plate (12) is fixedly connected to the upper end of the large socket (11). A rotating shaft (13) is rotatably connected above the mounting plate (12). A base (14) is rotatably connected above the rotating shaft (13). A fixing plate (15) is provided above the base (14). A rotating shaft (16) is rotatably connected to the rear end of the fixing plate (15). The bottom of the rotating shaft (16) is rotatably connected to the base (14). A bolt (17) is engaged with the front end of the fixing plate (15). The bolt (17) penetrates downward through the base (14).

5. A conduit equipped with distributed optical fiber sensors according to claim 4, characterized in that, Fixing rings (18) are fixedly installed at the left and right ends of the interior of the fixing plate (15).

6. A conduit equipped with distributed optical fiber sensors according to claim 1, characterized in that, A small socket (2) is fixedly installed at the right end of the threaded tube (1), a reinforcing rib (21) is fixedly installed at the right end of the small socket (2), and a sealing ring (22) is fixedly installed at the right end of the reinforcing rib (21). After the optical fiber (31) is wound on the threaded tube (1), it passes through the reinforcing rib (21) and the sealing ring (22) on the left side. After being wound once on the threaded tube (1) between the two sealing rings (22), it passes through the reinforcing rib (21) to the left.

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