High-energy pipeline leakage monitoring device

Abstract

The invention provides a high-energy pipeline leakage monitoring device, and relates to the technical field of pipeline detection, the high-energy pipeline leakage monitoring device comprises an industrial personal computer, a laser, an optical signal detector and a plurality of detection units, each detection unit comprises a temperature measurement optical fiber and a guided wave sensor, and the temperature measurement optical fibers and the guided wave sensors are arranged between the outer wall of a pipeline and a heat insulation layer; the laser emits a detection optical signal to the temperature measurement optical fiber; the optical signal detector receives an optical signal sent by the temperature measuring optical fiber; and the industrial personal computer is used for analyzing the optical signal received by the optical signal detector and the guided wave signal received by the guided wave sensor. According to the high-energy pipeline leakage monitoring device provided by the invention, the temperature measurement optical fiber and the guided wave sensor are simultaneously arranged between the heat insulation layer and the outer wall of the pipeline, and the guided wave sensor is used for sensing and detecting axial physical defects of the pipeline where the guided wave sensor is located. The industrial personal computer analyzes optical signals received by the optical signal detector and guided wave signals received by the guided wave sensor, and guidance is provided for multi-dimensional analysis of pipeline damage and maintenance schemes.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline detection, and in particular to a high-energy pipeline leakage monitoring device. Background Art

[0002] High-energy pipelines in large power systems are used to transmit high-temperature, high-pressure steam, water and other fluids to realize the functions of the system. However, due to the thermal conductivity of the material, the wall of the high-energy pipeline is often in a high-temperature state. There is a certain temperature difference with the surrounding environment, which causes the energy of the fluid in the pipeline to be dissipated in the form of heat, affecting the operating performance of the system. At the same time, the high-temperature pipeline will also cause burns to the surrounding personnel. Therefore, a special material insulation layer is often used to cover it. Glass wool and its products have good thermal insulation and sound absorption properties, and are widely used in various types of high-energy pipeline insulation. On the other hand, the traditional thermal insulation coating has a single function and only realizes the thermal insulation function. During the long-term use of high-energy pipelines, leakage and rupture will occur. At this time, the conventional thermal insulation coating causes the leakage point to be deeply buried, making it difficult to effectively detect the pipeline and quickly locate the fault point. Summary of the invention

[0003] The present invention provides a high-energy pipeline leakage monitoring device, which is used to solve the defect that the detection of pipeline damage in the prior art cannot quickly locate the fault point.

[0004] According to a high-energy pipeline leakage monitoring device provided by the present invention, a high-energy pipeline leakage monitoring device includes an industrial computer, a laser, an optical signal detector and a plurality of detection units, wherein the detection units are connected to the outer wall of the pipeline, and the plurality of detection units are distributed circumferentially along the outer wall of the pipeline, and the detection units include a temperature measuring optical fiber and a waveguide sensor, wherein the temperature measuring optical fiber extends axially along the pipeline, and the temperature measuring optical fiber and the waveguide sensor are arranged between the outer wall of the pipeline and the thermal insulation layer; The lasers are respectively connected to the ends of the temperature measuring optical fibers, and are used to emit detection optical signals to the temperature measuring optical fibers; The optical signal detectors are respectively connected to the ends of the temperature measuring optical fibers, and are used to receive the optical signals emitted by the temperature measuring optical fibers; The industrial computer is communicatively connected to the optical signal detector and the waveguide sensor respectively, and is used for analyzing the optical signal received by the optical signal detector and the waveguide signal received by the waveguide sensor.

[0005] According to a high-energy pipeline leakage monitoring device provided by the present invention, the number of the temperature measuring optical fibers in each detection unit is two, the temperature measuring optical fibers are arranged axially along the pipeline, and the waveguide sensor is arranged between the two temperature measuring optical fibers.

[0006] According to a high-energy pipeline leakage monitoring device provided by the present invention, the waveguide sensor includes a waveguide excitation signal generator and a waveguide receiver, and the waveguide excitation signal generator and the waveguide receiver are respectively connected to the industrial computer for communication.

[0007] According to a high-energy pipeline leakage monitoring device provided by the present invention, the temperature measuring optical fiber and the waveguide sensor are arranged in contact with the outer wall of the pipeline.

[0008] According to a high-energy pipeline leakage monitoring device provided by the present invention, the detection unit also includes a coating strip, which extends axially along the pipeline, the temperature measuring optical fiber and the waveguide sensor are connected to the side wall of the coating strip, and the coating strip is axially distributed on the outer wall of the pipeline along with the detection unit to construct an insulation layer covering the outer wall of the pipeline.

[0009] A high-energy pipeline leakage monitoring device provided according to the present invention further includes a connecting key, wherein the connecting key is located between two adjacent detection units, and a key groove for the connecting key to be embedded is provided on the opposite side of two adjacent covering strips.

[0010] According to a high-energy pipeline leakage monitoring device provided by the present invention, both sides of the connecting key are arranged as dovetail protrusions, and the keyway is arranged as a dovetail groove.

[0011] A high-energy pipeline leakage monitoring device provided according to the present invention further includes a locking ring, the pipeline and the detection unit are arranged in the locking ring, and the locking ring presses the detection unit to the outer wall of the pipeline.

[0012] According to a high-energy pipeline leakage monitoring device provided by the present invention, the connecting key extends out of one end of the covering strip and is fixedly connected to the outer wall of the pipeline.

[0013] According to a high-energy pipeline leakage monitoring device provided by the present invention, a high-energy pipeline leakage monitoring device is provided according to the present invention.

[0014] The present invention provides a high-energy pipeline leakage monitoring device, which simultaneously arranges a temperature measuring optical fiber and a waveguide sensor between the thermal insulation layer and the outer wall of the pipeline, and the waveguide sensor senses and detects the axial physical defects of the pipeline in which it is located. The temperature measuring optical fiber senses and measures the temperature along the axial direction of the pipeline. Multiple detection units are axially arranged on the outer wall of the pipeline, respectively, to achieve detection and monitoring of the entire pipeline. There is no need to remove the thermal insulation layer to locate pipeline defects, leakage points and measure the corresponding temperatures. The industrial computer is communicatively connected with the temperature measuring optical fiber and the waveguide sensor, and the industrial computer realizes the analysis of the optical signal received by the optical signal detector and the waveguide signal received by the waveguide sensor, providing guidance for multi-dimensional analysis of pipeline damage and maintenance plans. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a high-energy pipeline leakage monitoring device provided by the present invention.

[0017] Figure 2 It is a schematic diagram of the connection relationship between the temperature measuring optical fiber and the waveguide sensor of the present invention.

[0018] Figure 3 It is a schematic diagram of the connection relationship in which dovetail protrusions are arranged on both sides of the connection key of the present invention.

[0019] Figure 4 It is a schematic diagram of the connection relationship between the temperature measuring optical fiber, the waveguide sensor and the positioning groove of the present invention.

[0020] Reference numerals: 1. Industrial computer; 11. Guided wave damage assessment module; 12. Optical fiber temperature measurement analysis module software; 13. Multi-dimensional pipeline damage assessment module; 2. Laser; 3. Optical signal detector; 4. Detection unit; 41. Temperature measurement optical fiber; 42. Guided wave sensor; 421. Guided wave excitation signal generator; 422. Guided wave receiver; 43. Coating strip; 431. Keyway; 432. Positioning groove; 5. Connecting key; 51. Dovetail boss; 6. Locking ring; 7. Pipeline. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The features of the terms "first" and "second" in the specification and claims of the present invention may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects associated before and after are in an "or" relationship.

[0023] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] Combine the following Figure 1-Figure 4 The high energy pipeline 7 leakage monitoring device of the present invention is described.

[0025] The present invention provides a high-energy pipeline 7 leakage monitoring device, comprising an industrial computer 1, a laser 2, an optical signal detector 3 and a plurality of detection units 4. The detection unit 4 is connected to the outer wall of the pipeline 7, and the plurality of detection units 4 are distributed circumferentially along the outer wall of the pipeline 7. The detection unit 4 comprises a temperature measuring optical fiber 41 and a waveguide sensor 42, the temperature measuring optical fiber 41 extends axially along the pipeline 7, and the temperature measuring optical fiber 41 and the waveguide sensor 42 are arranged between the outer wall of the pipeline 7 and the thermal insulation layer. The laser 2 is respectively connected to the end of the temperature measuring optical fiber 41, and is used to emit a detection optical signal to the temperature measuring optical fiber 41. The optical signal detector 3 is respectively connected to the end of the temperature measuring optical fiber 41, and is used to receive the optical signal emitted by the temperature measuring optical fiber 41. The industrial computer 1 is respectively connected to the optical signal detector 3 and the waveguide sensor 42 for communication, and is used to analyze the optical signal received by the optical signal detector 3 and the waveguide signal received by the waveguide sensor 42.

[0026] Specifically, Figure 1 As shown, the detection unit 4 is installed on the outer wall of the pipeline 7, and the temperature measuring optical fiber 41 and the waveguide sensor 42 are attached to the pipeline 7 and are located between the outer wall of the pipeline 7 and the thermal insulation layer. The waveguide sensor 42 senses and detects the axial physical defects of the pipeline 7 in which it is located, and the temperature measuring optical fiber 41 senses and measures the temperature along the axial direction of the pipeline 7. Multiple detection units 4 are installed on the outer wall of the pipeline 7 in a circumferential distribution, thereby realizing the monitoring and positioning of the defects and temperature of the entire pipeline 7. The pulse signal light source is constructed by the laser 2 for detection, and the optical signal detector 3 receives the detected optical signal. The industrial computer 1 analyzes the optical signal received by the optical signal detector 3 and the waveguide signal received by the waveguide sensor 42. Of course, the industrial computer 1 can also be connected to the laser 2 for communication, so as to control the emission of the laser 2.

[0027] Specifically, Figure 2As shown, a waveguide damage assessment module 11 may be provided in the industrial computer 1, and the waveguide damage assessment module 11 is connected to the waveguide receiver 422 for analyzing the waveguide signal. An optical fiber temperature measurement and analysis module may also be provided in the industrial computer 1, and the optical fiber temperature measurement and analysis module is connected to the optical signal detector 3 for analyzing the optical signal detected by the optical signal detector 3. A multi-dimensional pipeline 7 damage assessment module 13 may also be provided in the industrial computer 1, and the multi-dimensional pipeline 7 damage assessment module 13 is connected to the optical fiber temperature measurement and analysis module and the waveguide damage assessment module 11 for comprehensive analysis of the output results of the waveguide damage assessment module 11 and the optical fiber temperature measurement and analysis module. This provides guidance for the emergency maintenance plan of the pipeline 7.

[0028] When using the high-energy pipeline 7 leakage monitoring device, multiple detection units 4 are installed on the outer wall of the pipeline 7, and the waveguide sensor 42 uses waveguide to perform real-time detection and positioning of pipeline 7 damage. During the transmission of waves in the pipeline 7, when the wave velocity changes due to local defects or discontinuous gaps, it will cause reflection and refraction of the waves, thereby generating reflection echoes carrying structural defects and gap information. The waveguide sensor 42 receives its signal and transmits it to the industrial computer 1 through a communication connection for analysis, thereby determining the location of the defect in the pipeline 7. At the same time, the temperature measuring optical fiber 41 is arranged along the axis between the insulation layer and the wall of the pipeline 7, and a pulse signal light source is constructed through a laser 2, and the optical signal detector 3 receives the detected optical signal. Based on the spontaneous scattering effect of the optical fiber, the optical signal detected by the optical signal detector 3 is received and transmitted to the industrial computer 1 through a communication connection for analysis.

[0029] The present invention provides a high-energy pipeline 7 leakage monitoring device, which simultaneously sets a temperature measuring optical fiber 41 and a waveguide sensor 42 between the heat insulation layer and the outer wall of the pipeline 7, and the waveguide sensor 42 senses and detects the axial physical defects of the pipeline 7 in which it is located. The temperature measuring optical fiber 41 senses and measures the temperature along the axial direction of the pipeline 7. Multiple detection units 4 are axially arranged on the outer wall of the pipeline 7, respectively, to realize the detection and monitoring of the entire pipeline 7. There is no need to remove the heat insulation layer to locate the defects and leakage points of the pipeline 7 and measure the corresponding temperature. The industrial computer 1 is connected to the temperature measuring optical fiber 41 and the waveguide sensor 42 for communication, and the industrial computer 1 realizes the analysis of the optical signal received by the optical signal detector 3 and the waveguide signal received by the waveguide sensor 42, providing guidance for multi-dimensional analysis of pipeline 7 damage and maintenance plans.

[0030] Furthermore, two temperature measuring optical fibers 41 are provided in each detection unit 4, the temperature measuring optical fibers 41 are arranged along the axial direction of the pipeline 7, and the waveguide sensor 42 is arranged between the two temperature measuring optical fibers 41. Specifically, Figure 1As shown, two temperature measuring optical fibers 41 are provided, and the waveguide sensor 42 is provided between the two temperature measuring optical fibers 41, which further increases the density of collecting the temperature of the outer wall of the pipeline 7, thereby improving the detection accuracy.

[0031] Furthermore, the waveguide sensor 42 includes a waveguide excitation signal generator 421 and a waveguide receiver 422 , and the waveguide excitation signal generator 421 and the waveguide receiver 422 are respectively connected to the industrial computer 1 for communication.

[0032] Specifically, Figure 2 As shown, the wave excitation signal generator and the waveguide receiver 422 in the waveguide sensor 42 are respectively connected to the industrial computer 1. The industrial computer 1 controls the waveguide excitation signal generator 421 to send an excitation signal to the pipeline 7 through a communication connection, thereby forming a waveguide in the pipe wall of the pipeline 7. The waveguide receiver 422 senses and receives the reflected echo signal carrying the structural defects and gap information, and transmits it to the industrial computer 1 through a communication connection for analysis. The defects and leakage points of the pipeline 7 are located.

[0033] Furthermore, the temperature measuring optical fiber 41 and the waveguide sensor 42 are arranged in close contact with the outer wall of the pipeline 7. The temperature measuring optical fiber 41 and the waveguide sensor 42 are arranged in close contact with the pipe wall, thereby improving the sensing accuracy of the temperature measuring optical fiber 41 and the waveguide sensor 42. Furthermore, the detection unit 4 also includes a coating strip 43, which extends axially along the pipeline 7. The temperature measuring optical fiber 41 and the waveguide sensor 42 are connected to the side wall of the coating strip 43. The coating strip 43 is axially distributed on the outer wall of the pipeline 7 along with the detection unit 4 to construct an insulation layer covering the outer wall of the pipeline 7.

[0034] Specifically, Figure 1As shown, the coating strip 43 is set to an arc structure and is made of a flexible heat-insulating material. When the edges of two adjacent coating strips 43 are squeezed against each other, a certain deformation can be generated at the edges to ensure the tightness of the connection seam at the edges of the coating strips, thereby improving the heat preservation effect. When the detection unit 4 is installed on the pipeline 7, the coating strip 43 is extended axially along the pipeline 7, and the temperature measuring optical fiber 41 and the waveguide sensor 42 are connected to the side wall of the coating strip 43. Then, one end of the coating strip 43 with the temperature measuring optical fiber 41 and the waveguide sensor 42 is directed toward the pipeline 7, so that the temperature measuring optical fiber 41 and the waveguide sensor 42 are fitted with the outer wall of the pipeline 7, thereby completing the connection of a detection unit 4 on the pipeline 7. Multiple detection units 4 are connected to the outer wall of the pipeline 7 in the same way, and the coating strips 43 are axially distributed on the outer wall of the pipeline 7, and the side walls of the two adjacent coating strips 43 are fitted to each other to cover the pipeline 7, so as to construct a heat-insulating layer. Thus, the temperature measuring optical fiber 41 and the waveguide sensor 42 are coated between the thermal insulation layer and the outer wall of the pipe 7, so as to achieve the insulation of the pipe 7 while providing a closed space for damage detection and reducing the interference of the background environment on damage detection. The thermal insulation layer is composed of multiple coating strips 43, so that the independent disassembly and installation of a single coating strip 43 can be realized, which is convenient for subsequent maintenance. For pipes 7 of different diameters, different numbers of detection units 4 can be selected to complete the construction of the thermal insulation layer of the pipe 7. The coating layer adopts a block design, which can be flexibly handled in adapting to different coating requirements of pipes 7 and emergency repairs of local positions of pipes 7, and greatly improves the use efficiency of the coating layer while meeting the insulation requirements. By combining the thermal insulation layer structure of pipe 7 with the leakage monitoring device of pipe 7. While ensuring the thermal insulation function of pipe 7, the operating status of pipe 7 can be monitored in real time, providing conditions for the rapid relief of operating accidents of pipe 7 and related systems.

[0035] Furthermore, it also includes a connecting key 5, which is located between two adjacent detection units 4, and a key groove 431 for the connecting key 5 to be embedded is provided on the opposite side of two adjacent covering strips 43.

[0036] Specifically, Figure 2 As shown, in an optional embodiment, two adjacent covering strips 43 are positioned by a connecting key 5. The connecting key 5 is set as a flat key structure, and a key groove 431 is set on the opposite side of the covering strip 43. When the detection unit 4 is connected to the pipeline 7, the key grooves 431 on the adjacent covering strips 43 are arranged opposite to each other, and the connecting key 5 is inserted into the key groove 431, thereby realizing the positioning between the two adjacent covering strips 43.

[0037] In another optional embodiment, if Figure 3As shown, dovetail protrusions 51 are respectively provided on both sides of the connection key 5, and the key slot 431 is provided as a dovetail slot. When the detection unit 4 is connected to the pipeline 7, the key slots 431 on the two adjacent covering strips 43 are arranged opposite to each other, and the connection key 5 with the dovetail protrusion 51 is inserted into the dovetail slot to achieve the connection positioning between the two adjacent covering strips 43, thereby improving the stability of the connection between the two adjacent covering strips 43.

[0038] Furthermore, if Figure 1 As shown, it also includes a locking ring 6, and the pipeline 7 and the detection unit 4 are arranged in the locking ring 6. The locking ring 6 presses the detection unit 4 to the outer wall of the pipeline 7. The locking ring 6 is sleeved on the outer wall of the insulation layer to press the detection unit 4 to the outer wall of the pipeline 7, further improving the stability of the connection between the detection unit 4 and the pipeline 7. The locking ring 6 can be a clamp or an annular lock.

[0039] In an optional embodiment, one end of the connection key 5 extending out of the covering strip 43 is fixedly connected to the outer wall of the pipe 7. Specifically, when the detection unit 4 is fixed on the pipe 7, the key slots 431 are arranged opposite to each other, the connection key 5 is inserted into the key slot 431, and the end of the connection key 5 extends out of the key slot 431. The end of the connection key 5 extending out of the covering strip 43 can be fixedly connected to the outer wall of the pipe 7 by bonding, thereby improving the stability of the connection of the covering strip 43.

[0040] In an optional embodiment, if Figure 1 As shown, the coating strip 43 is directly pressed onto the temperature measuring optical fiber 41 and the waveguide sensor 42 .

[0041] In another optional embodiment, if Figure 4 As shown, the side wall of the coating strip 43 is provided with positioning grooves 432 for the temperature measuring optical fiber 41 and the waveguide sensor 42 to be respectively embedded. When the temperature measuring optical fiber 41 and the waveguide sensor 42 are connected to the side wall of the coating strip 43, the temperature measuring optical fiber 41 and the waveguide sensor 42 are embedded in the positioning grooves 432, thereby improving the stability of the setting of the temperature measuring optical fiber 41 and the waveguide sensor 42.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-energy pipeline leakage monitoring device, characterized in that: It includes an industrial computer, a laser, an optical signal detector and a plurality of detection units, wherein the detection units are connected to the outer wall of the pipeline, and the plurality of detection units are distributed circumferentially along the outer wall of the pipeline, and the detection units include a temperature measuring optical fiber and a waveguide sensor, wherein the temperature measuring optical fiber extends axially along the pipeline, and the temperature measuring optical fiber and the waveguide sensor are arranged between the outer wall of the pipeline and the heat insulation layer; The lasers are respectively connected to the ends of the temperature measuring optical fibers, and are used to emit detection optical signals to the temperature measuring optical fibers; The optical signal detectors are respectively connected to the ends of the temperature measuring optical fibers, and are used to receive the optical signals emitted by the temperature measuring optical fibers; The industrial computer is communicatively connected to the optical signal detector and the waveguide sensor respectively, and is used for analyzing the optical signal received by the optical signal detector and the waveguide signal received by the waveguide sensor.

2. The high energy pipeline leakage monitoring device according to claim 1 is characterized in that: The temperature measuring optical fibers in each of the detection units are arranged in two, the temperature measuring optical fibers are arranged along the axial direction of the pipeline, and the waveguide sensor is arranged between the two temperature measuring optical fibers.

3. The high energy pipeline leakage monitoring device according to claim 1 is characterized in that: The waveguide sensor comprises a waveguide excitation signal generator and a waveguide receiver, and the waveguide excitation signal generator and the waveguide receiver are respectively connected to the industrial computer for communication.

4. The high energy pipeline leakage monitoring device according to claim 1 is characterized in that: The temperature measuring optical fiber and the waveguide sensor are arranged in contact with the outer wall of the pipeline.

5. The high energy pipeline leakage monitoring device according to any one of claims 1 to 4, characterized in that: The detection unit also includes a coating strip, which extends axially along the pipeline. The temperature measuring optical fiber and the waveguide sensor are connected to the side wall of the coating strip. The coating strip is axially distributed on the outer wall of the pipeline along with the detection unit to construct a heat insulation layer covering the outer wall of the pipeline.

6. The high energy pipeline leakage monitoring device according to claim 5, characterized in that: It also includes a connecting key, which is located between two adjacent detection units, and a key groove for the connecting key to be embedded is arranged on the opposite side of two adjacent covering strips.

7. The high energy pipeline leakage monitoring device according to claim 6 is characterized in that: The two sides of the connecting key are arranged as dovetail protrusions, and the key slot is arranged as a dovetail slot.

8. The high energy pipeline leakage monitoring device according to claim 7, characterized in that: It also includes a locking ring, in which the pipeline and the detection unit are arranged, and the locking ring presses the detection unit against the outer wall of the pipeline.

9. The high energy pipeline leakage monitoring device according to claim 6, characterized in that: The connecting key extends out of one end of the covering strip and is fixedly connected to the outer wall of the pipeline.

10. The high energy pipeline leakage monitoring device according to claim 6, characterized in that: The side wall of the coating strip is provided with positioning grooves for the temperature measuring optical fiber and the waveguide sensor to be embedded respectively.

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