Fiber bragg grating vibration sensor for monitoring gas pipeline

Abstract

The utility model provides a fiber bragg grating vibration sensor for gas pipeline monitoring, which relates to the technical field of fiber bragg grating vibration sensors for gas pipeline monitoring, and comprises a pipeline body, a mounting structure is arranged on the pipeline body, and the mounting structure mainly comprises two first half rings, the two first semi-rings are both arranged on the pipeline body, second semi-rings are rotatably connected to the first semi-rings, connecting blocks are fixedly connected to the second semi-rings, connecting grooves are formed in the first semi-rings, the connecting grooves are matched with the connecting blocks in size, a rectangular plate is fixedly connected to the two first semi-rings together, and the rectangular plate is fixedly connected to the second semi-rings. According to the utility model, the problem that the installation complexity is increased due to the fact that the fiber grating vibration sensor is directly adhered to the surface of the gas pipeline by using an adhesive mostly at present and grease, dust or a coating on the surface of the pipeline can influence the adhesion effect of the adhesive, so that the pipeline needs to be cleaned before installation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber grating vibration sensors for gas pipeline monitoring, in particular to an optical fiber grating vibration sensor for gas pipeline monitoring. Background Art

[0002] Fiber Bragg grating vibration sensor is a sensor that uses the fiber Bragg grating principle to measure vibration. In gas pipeline monitoring applications, fiber Bragg grating vibration sensor has many advantages, including corrosion resistance, high temperature resistance, low electromagnetic interference, small size, light weight and easy remote monitoring.

[0003] When using the current fiber grating vibration sensors for gas pipeline monitoring, workers often find that currently most fiber grating vibration sensors are directly attached to the surface of the gas pipeline using adhesives. Since grease, dust or coatings on the surface of the pipeline will affect the bonding effect of the adhesive, the pipeline needs to be cleaned before installation, which increases the complexity of the installation. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a fiber grating vibration sensor for gas pipeline monitoring.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fiber grating vibration sensor for gas pipeline monitoring, comprising a pipeline body, a mounting structure is arranged on the pipeline body, the mounting structure is mainly composed of two first half rings, the two first half rings are arranged on the pipeline body, the first half ring is rotatably connected to the second half ring, the second half ring is fixedly connected to the connecting block, the first half ring is provided with a connecting groove, the connecting groove is adapted to the size of the connecting block, the two first half rings are commonly fixedly connected to a rectangular plate, and the mounting block is arranged on the rectangular plate.

[0006] The effect achieved by the above components is: when the fiber Bragg grating is vibrated, wavelength changes related to the vibration frequency and amplitude will occur. These wavelength changes can be detected by the fiber Bragg grating reading device and converted into electrical signals. Then, the electrical signals can be further processed and analyzed to determine the characteristics of the vibration, such as its frequency, amplitude and direction, so as to monitor the pipeline body. The fiber Bragg grating vibration sensor is clamped on the mounting block, and then the two second half rings are rotated so that the first half ring and the second half ring are clamped on the pipeline body, and the connecting block is clamped into the connecting groove, and the first half ring and the second half ring are connected together, so that the fiber Bragg grating vibration sensor can be conveniently installed on the pipeline body, thereby avoiding the current situation where the fiber Bragg grating vibration sensor is directly pasted on the surface of the gas pipeline using adhesives. Since grease, dust or coating on the surface of the pipeline will affect the bonding effect of the adhesive, it is necessary to clean the pipeline before installation, which increases the complexity of the installation.

[0007] Preferably, telescopic rods are fixedly connected to both sides of the mounting block, and a baffle is fixedly connected to one end of the telescopic rod.

[0008] The effect achieved by the above components is: by pulling the two telescopic rods, the two baffles clamp the two sides of the fiber grating vibration sensor, making the installation more stable.

[0009] Preferably, a spring is sleeved on the telescopic rod, one end of the spring is fixedly connected to the baffle, and the other end of the spring is fixedly connected to the mounting block.

[0010] The effect achieved by the above components is that when the baffle clamps the fiber grating vibration sensor, the two springs are in a stretched state, so the rebound force of the springs acts on the baffle, thereby further improving the stability of the installation.

[0011] Preferably, the first half ring and the second half ring are both fixedly connected to limiting posts, and one of the limiting posts is rotatably connected to a limiting block.

[0012] The effect achieved by the above components is: after the first half ring is connected to the second half ring, the limit block is rotated so that the limit block is stuck on the limit column, further improving the stability of the connection between the first half ring and the second half ring.

[0013] Preferably, an adjustment structure is provided on the rectangular plate, and the adjustment structure is mainly composed of a rectangular block. The rectangular block is provided on the rectangular plate, a cylinder is fixedly connected to the rectangular block, and a piston rod of the cylinder is fixedly connected to the mounting block.

[0014] The effects achieved by the above components are: starting the cylinder, the piston rod of the cylinder drives the mounting block to move, thereby changing the distance between the fiber optic Bragg grating vibration sensor and the pipeline body, making the monitoring more accurate.

[0015] Preferably, a slide groove is provided on the rectangular plate, a slider is slidably connected in the slide groove, and the slider is fixedly connected to the rectangular block.

[0016] The effect achieved by the above components is that the position of the fiber grating vibration sensor can be changed by sliding the slider, thereby facilitating the monitoring of different positions of the pipeline body and further improving the accuracy.

[0017] Preferably, a threaded rod is rotatably connected in the slide groove, the threaded rod is threadedly connected to the slider, a motor is fixedly connected to the rectangular plate, and the output shaft of the motor is fixedly connected to the threaded rod.

[0018] The effects achieved by the above components are: starting the motor, the output shaft of the motor drives the threaded rod to rotate, and since the slider slides in the slide groove within a limited position, rotating the threaded rod can drive the slider to slide, making the adjustment operation more convenient.

[0019] Preferably, a sliding rod is slidably inserted into the rectangular block, and one end of the sliding rod is fixedly connected to the mounting block.

[0020] The effect achieved by the above components is that the slide bar slides at the upper limit of the rectangular block, which can make the movement process of the installation block more stable.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are that, in the utility model, by setting a mounting structure, the fiber Bragg grating vibration sensor is clamped on the mounting block, and then the two second half rings are rotated so that the first half ring and the second half ring are clamped on the pipeline body, and the connecting block is clamped into the connecting groove, the first half ring and the second half ring are connected together, and then the fiber Bragg grating vibration sensor can be conveniently installed on the pipeline body, and the two telescopic rods are pulled so that the two baffles clamp the two sides of the fiber Bragg grating vibration sensor, so that the installation is more stable, and when the baffles clamp the fiber Bragg grating vibration sensor When the two springs are in a stretched state, the rebound force of the springs acts on the baffle, thereby further improving the stability of the installation. After the first half ring is connected to the second half ring, the limit block is rotated so that the limit block is stuck on the limit column, further improving the stability of the connection between the first half ring and the second half ring, thereby avoiding the situation in which the fiber grating vibration sensor is directly pasted on the surface of the gas pipeline using adhesives. Since grease, dust or coating on the surface of the pipeline will affect the bonding effect of the adhesive, it is necessary to clean the pipeline before installation, which increases the complexity of the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model provides a three-dimensional structural schematic diagram of a fiber grating vibration sensor for gas pipeline monitoring;

[0023] Figure 2 This is a partial schematic diagram of the installation structure of a fiber grating vibration sensor for gas pipeline monitoring proposed by the utility model;

[0024] Figure 3 Another schematic diagram of a mounting structure of a fiber grating vibration sensor for gas pipeline monitoring proposed by the utility model;

[0025] Figure 4 The utility model proposes a fiber grating vibration sensor for gas pipeline monitoring Figure 1 Enlarged view of part A.

[0026] Legend: 1. Pipe body; 2. Mounting structure; 21. First half ring; 22. Second half ring; 23. Connecting groove; 24. Connecting block; 25. Limiting column; 26. Limiting block; 27. Rectangular plate; 28. Mounting block; 29. ​​Telescopic rod; 210. Baffle; 211. Spring; 3. Adjusting structure; 31. Rectangular block; 32. Cylinder; 33. Slide groove; 34. Sliding block; 35. Threaded rod; 36. Motor; 37. Sliding rod. DETAILED DESCRIPTION

[0027] Embodiment 1, as Figure 1 As shown, a fiber grating vibration sensor for gas pipeline monitoring includes a pipeline body 1.

[0028] Reference Figure 2 and Figure 3, a mounting structure 2 is provided on the pipeline body 1, and the mounting structure 2 is mainly composed of two first half rings 21, and the two first half rings 21 are both provided on the pipeline body 1, and the first half ring 21 is rotatably connected with the second half ring 22, and the second half ring 22 is fixedly connected with a connecting block 24, and the first half ring 21 is provided with a connecting groove 23, and the size of the connecting groove 23 and the connecting block 24 are adapted, and the two first half rings 21 are commonly fixedly connected with a rectangular plate 27, and a mounting block 28 is provided on the rectangular plate 27. When the fiber grating is vibrated, wavelength changes related to the vibration frequency and amplitude will occur, and these wavelength changes can be detected by light. The fiber Bragg grating reading device detects and converts it into an electrical signal, which can then be further processed and analyzed to determine the characteristics of the vibration, such as its frequency, amplitude and direction, so that the pipeline body 1 can be monitored. The fiber Bragg grating vibration sensor is clamped on the mounting block 28, and then the two second half rings 22 are rotated so that the first half ring 21 and the second half ring 22 are clamped on the pipeline body 1, and the connecting block 24 is clamped into the connecting groove 23, and the first half ring 21 and the second half ring 22 are connected together, so that the fiber Bragg grating vibration sensor can be conveniently installed on the pipeline body 1, thereby avoiding the problem of using adhesives. The fiber Bragg grating vibration sensor is directly pasted on the surface of the gas pipeline. Since grease, dust or coating on the surface of the pipeline will affect the bonding effect of the adhesive, the pipeline needs to be cleaned before installation, which increases the complexity of the installation. The two sides of the installation block 28 are fixedly connected with telescopic rods 29, and one end of the telescopic rod 29 is fixedly connected with a baffle 210. Pull the two telescopic rods 29 so that the two baffles 210 clamp the two sides of the fiber Bragg grating vibration sensor, making the installation more stable. A spring 211 is sleeved on the telescopic rod 29, and one end of the spring 211 is fixedly connected to the baffle 210. The other end of 11 is fixedly connected to the mounting block 28. When the baffle 210 clamps the fiber grating vibration sensor, the two springs 211 are in a stretched state, so the rebound force of the spring 211 acts on the baffle 210, thereby further improving the stability of the installation. The first half ring 21 and the second half ring 22 are both fixedly connected to the limiting column 25, and a limiting block 26 is rotatably connected to a limiting column 25. After the first half ring 21 and the second half ring 22 are connected, the limiting block 26 is rotated so that the limiting block 26 is stuck on the limiting column 25, thereby further improving the stability of the connection between the first half ring 21 and the second half ring 22.

[0029] Reference Figure 2 and Figure 4, an adjusting structure 3 is provided on the rectangular plate 27, and the adjusting structure 3 is mainly composed of a rectangular block 31, and the rectangular block 31 is provided on the rectangular plate 27, and a cylinder 32 is fixedly connected to the rectangular block 31, and a piston rod of the cylinder 32 is fixedly connected to the mounting block 28, and the cylinder 32 is started, and the piston rod of the cylinder 32 drives the mounting block 28 to move, thereby changing the distance between the fiber Bragg grating vibration sensor and the pipeline body 1, so that the monitoring is more accurate, and a slide groove 33 is provided on the rectangular plate 27, and a slider 34 is slidably connected in the slide groove 33, and the slider 34 is fixedly connected to the rectangular block 31, and the position of the fiber Bragg grating vibration sensor can be changed by sliding the slider 34, so as to facilitate the different positions of the pipeline body 1 The monitoring is performed on the device to further improve the accuracy. A threaded rod 35 is rotatably connected in the slide groove 33, and the threaded rod 35 is threadedly connected to the slider 34. A motor 36 is fixedly connected to the rectangular plate 27, and the output shaft of the motor 36 is fixedly connected to the threaded rod 35. The motor 36 is started, and the output shaft of the motor 36 drives the threaded rod 35 to rotate. Since the slider 34 slides in a limited position in the slide groove 33, rotating the threaded rod 35 can drive the slider 34 to slide, making the adjustment operation more convenient. A sliding rod 37 is slidably inserted on the rectangular block 31, and one end of the sliding rod 37 is fixedly connected to the mounting block 28. The sliding rod 37 slides in the limited position on the rectangular block 31, which can make the movement process of the mounting block 28 more stable.

[0030] Working principle: when the fiber Bragg grating is vibrated, wavelength changes related to the vibration frequency and amplitude will occur. These wavelength changes can be detected by the fiber Bragg grating reading device and converted into electrical signals. Then, the electrical signals can be further processed and analyzed to determine the characteristics of the vibration, such as its frequency, amplitude and direction, so as to monitor the pipeline body 1. The fiber Bragg grating vibration sensor is clamped on the mounting block 28, and then the two second half rings 22 are rotated so that the first half ring 21 and the second half ring 22 are clamped on the pipeline body 1, and the connecting block 24 is clamped into the connecting groove 23, and the first half ring 21 and the second half ring 22 are connected together, so that the fiber Bragg grating vibration sensor can be conveniently installed on the pipeline body 1, thereby avoiding the current situation that the fiber Bragg grating vibration sensor is directly pasted on the surface of the gas pipeline using adhesives. Since grease, dust or coating on the surface of the pipeline will affect the bonding effect of the adhesive, it is necessary to clean the pipeline before installation, which increases the complexity of the installation. Pull the two telescopic rods 29 so that the two baffles 210 clamp the two sides of the fiber Bragg grating vibration sensor. The first half ring 21 is connected to the second half ring 22, and the limit block 26 is rotated so that the limit block 26 is stuck on the limit column 25, which further improves the stability of the connection between the first half ring 21 and the second half ring 22. The cylinder 32 is started, and the piston rod of the cylinder 32 drives the installation block 28 to move, thereby changing the fiber grating vibration sensor. The distance between the grating vibration sensor and the pipeline body 1 makes the monitoring more accurate. The position of the fiber grating vibration sensor can be changed by sliding the slider 34, so as to facilitate the monitoring of different positions of the pipeline body 1 and further improve the accuracy. The motor 36 is started, and the output shaft of the motor 36 drives the threaded rod 35 to rotate. Since the slider 34 slides in the slide groove 33, rotating the threaded rod 35 can drive the slider 34 to slide, making the adjustment operation more convenient. The slide rod 37 slides in the rectangular block 31, which can make the movement process of the mounting block 28 more stable.

[0031] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.

Claims

1. A fiber Bragg grating vibration sensor for gas pipeline monitoring, comprising a pipeline body (1), characterized in that: The pipeline body (1) is provided with a mounting structure (2), the mounting structure (2) mainly consisting of two first half rings (21), the two first half rings (21) are both provided on the pipeline body (1), the first half ring (21) is rotatably connected to the second half ring (22), the second half ring (22) is fixedly connected to a connecting block (24), the first half ring (21) is provided with a connecting groove (23), the connecting groove (23) is adapted in size to the connecting block (24), the two first half rings (21) are commonly fixedly connected to a rectangular plate (27), and the rectangular plate (27) is provided with a mounting block (28).

2. The fiber Bragg grating vibration sensor for gas pipeline monitoring according to claim 1, characterized in that: Telescopic rods (29) are fixedly connected to both sides of the mounting block (28), and one end of the telescopic rod (29) is fixedly connected to a baffle (210).

3. The fiber Bragg grating vibration sensor for gas pipeline monitoring according to claim 2, characterized in that: A spring (211) is sleeved on the telescopic rod (29), one end of the spring (211) is fixedly connected to the baffle (210), and the other end of the spring (211) is fixedly connected to the mounting block (28).

4. The fiber Bragg grating vibration sensor for gas pipeline monitoring according to claim 3 is characterized in that: The first half ring (21) and the second half ring (22) are both fixedly connected to a limiting column (25), and one of the limiting columns (25) is rotatably connected to a limiting block (26).

5. The fiber Bragg grating vibration sensor for gas pipeline monitoring according to claim 4, characterized in that: An adjustment structure (3) is provided on the rectangular plate (27), and the adjustment structure (3) is mainly composed of a rectangular block (31). The rectangular block (31) is provided on the rectangular plate (27), and a cylinder (32) is fixedly connected to the rectangular block (31), and a piston rod of the cylinder (32) is fixedly connected to the mounting block (28).

6. The fiber Bragg grating vibration sensor for gas pipeline monitoring according to claim 5, characterized in that: The rectangular plate (27) is provided with a sliding groove (33), a sliding block (34) is slidably connected in the sliding groove (33), and the sliding block (34) is fixedly connected to the rectangular block (31).

7. The fiber Bragg grating vibration sensor for gas pipeline monitoring according to claim 6, characterized in that: A threaded rod (35) is rotatably connected in the slide groove (33), the threaded rod (35) is threadedly connected to the slider (34), a motor (36) is fixedly connected to the rectangular plate (27), and an output shaft of the motor (36) is fixedly connected to the threaded rod (35).

8. The fiber Bragg grating vibration sensor for gas pipeline monitoring according to claim 7, characterized in that: A sliding rod (37) is slidably inserted on the rectangular block (31), and one end of the sliding rod (37) is fixedly connected to the mounting block (28).

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