A device and method for detecting pipeline leakage using photoelectric signals

Abstract

The present invention discloses a device for detecting pipeline leakage by photoelectric signals, comprising a fiber optic ranging system connected to a slurry conveying pipeline via an optical fiber, the fiber optic ranging system is connected to an optical transmission device via an optical fiber, the optical transmission device is connected to a network switch via a data connection line, and the network switch is also connected to a CPU central processing unit, a terminal data processing platform and a data server via data connection lines. The device for detecting pipeline leakage by photoelectric signals of the present invention solves the problems of poor real-time performance of manual detection and poor detection accuracy of software methods in the prior art. The present invention also discloses a method for detecting pipeline leakage by photoelectric signals.

Description

Technical Field

[0001] The invention belongs to the technical field of photoelectric signal detection devices, and relates to a device for detecting pipeline leakage using photoelectric signals. The invention also relates to a method for detecting pipeline leakage using photoelectric signals. Background Art

[0002] Long-distance pipelines often leak due to various reasons such as pipeline corrosion, natural damage, third-party damage, pipeline defects or welding quality. Pipeline leakage not only causes huge economic losses to production and operation units, but also damages the environment and seriously affects the health and life safety of residents along the line. Timely detection of fluid pipeline leakage and location of leakage points to prevent further expansion of leakage accidents have important economic significance and social benefits.

[0003] There are many traditional methods for pipeline leakage detection in China: biological detection methods mainly use people to walk along the pipeline to check, which is direct and accurate, but has poor real-time performance and consumes a lot of manpower. Software methods mainly use flow, pressure, temperature and other data provided by the SCADA system to detect leaks through flow or pressure changes, mass or volume balance, dynamic model and pressure point analysis software, but this method has poor accuracy and a large error range. Summary of the invention

[0004] The purpose of the present invention is to provide a device for detecting pipeline leakage by photoelectric signals, which solves the problems of poor real-time performance of manual detection and poor detection accuracy of software methods in the prior art.

[0005] Another object of the present invention is to provide a method for detecting pipeline leakage using photoelectric signals.

[0006] The technical solution adopted by the present invention is a device for detecting pipeline leakage with photoelectric signals, including a fiber optic ranging system connected to a slurry conveying pipeline through an optical fiber, the fiber optic ranging system is connected to an optical transmission device through an optical fiber, the optical transmission device is connected to a network switch through a data connection line, and the network switch is also connected to a CPU central processing unit, a terminal data processing platform and a data server through data connection lines.

[0007] The first technical solution of the present invention is also characterized in that:

[0008] A plurality of optical fibers are evenly distributed on the outer wall of the slurry conveying pipeline along the length direction of the slurry conveying pipeline, and both ends of the optical fibers are connected to the optical fiber distance measurement system.

[0009] An optical fiber distance measurement system is respectively arranged at both ends of each optical fiber, and the two ends of the optical fiber are respectively connected to the optical fiber distance measurement system on the corresponding side.

[0010] Four optical fibers are evenly distributed on the outer wall of the slurry conveying pipeline along the length direction of the slurry conveying pipeline. Four sets of optical fiber ranging systems are respectively arranged at both ends of the slurry conveying pipeline, and one end of each optical fiber is connected to a set of optical fiber ranging systems on the same side.

[0011] The optical fiber is a single-mode multi-core ribbon optical fiber.

[0012] The terminal data processing platform is a desktop computer.

[0013] The second technical solution adopted by the present invention is a method for detecting pipeline leakage by photoelectric signals, which adopts the above-mentioned device for detecting pipeline leakage by photoelectric signals, specifically: each optical fiber ranging system measures the distance of the connected optical fiber in real time and continuously, and the measured data is transmitted to the optical transmission equipment and the network switch in sequence through the data connection line. The network switch transmits the data to the terminal data processing platform and finally transmits it to the terminal data processing platform. The real-time status of the optical fiber outside the pipeline is displayed on the display screen of the terminal data processing platform. If a leak occurs at position k on one side of the slurry conveying pipeline, the slurry pressure at the leakage position will impact the optical fiber surrounding the outside of the slurry conveying pipeline, causing the optical fiber to be disconnected at position k. At this time, the data measured by the optical fiber ranging system will change, and the changed distance data will be processed by the terminal data processing platform and finally displayed on the display screen. The user can accurately and timely judge the location of the pipeline leakage point according to the communication status of the ring network optical fiber outside the slurry conveying pipeline displayed in real time on the display screen.

[0014] The second technical solution of the present invention is also characterized in that:

[0015] The data processing process of the terminal data processing platform is as follows:

[0016] The photoelectric detection system is proportionally reduced on the terminal data processing platform. Specifically, assuming that a is the length of the slurry delivery pipeline, b is the length of each optical fiber on the slurry delivery pipeline, and c is the length of the slurry delivery pipeline after the terminal data processing platform is proportionally reduced, the length of the optical fiber after the proportional reduction is When a leak occurs at position k on one side of the slurry delivery pipeline, the high pressure of the slurry will cause the optical fiber at the leaking position to be disconnected. At this time, the real-time data measured by the optical fiber ranging system will change, and the display screen of the terminal data processing platform will show that the optical fiber distance changes from the normal state to the current state. The length is shortened to The optical fiber distance measurement system connected to the corresponding optical fiber on the other side of the slurry delivery pipeline measures data n, and the normal distance of the optical fiber from back to front is shown on the display screen. After the data is calculated, it can be displayed intuitively on the display screen.

[0017] The actual position of the breaking point is shown.

[0018] The beneficial effects of the present invention are as follows: the present invention can quickly and effectively realize accurate positioning of pipeline leakage positions, reduce leakage response time, and accurately locate leakage positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a device for detecting pipeline leakage using photoelectric signals according to the present invention;

[0020] Figure 2 The present invention is a diagram of the arrangement of optical fibers in a device for detecting pipeline leakage using photoelectric signals.

[0021] In the figure, 1. CPU central processing unit, 2. terminal data processing platform, 3. data server, 4. network switch, 5. optical transmission equipment, 6 optical fiber ranging system, 7. data connection line, 8. optical fiber, 9. slurry conveying pipeline. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The present invention provides a device for detecting pipeline leakage with a photoelectric signal, the structure of which is as follows: Figure 1 As shown, it includes an optical fiber ranging system 6 connected to a slurry conveying pipeline 9 via an optical fiber 8, the optical fiber ranging system 6 is connected to an optical transmission device 5 via an optical fiber, the optical transmission device 5 is connected to a network switch 4 via a data connection line 7, and the network switch 4 is also connected to a CPU central processing unit 1, a terminal data processing platform 2 and a data server 3 via data connection lines 7.

[0024] like Figure 2 As shown, a plurality of optical fibers 8 are evenly distributed on the outer wall of the slurry conveying pipeline 9 along the length direction of the slurry conveying pipeline 9 , and both ends of the optical fibers 8 are connected to the optical fiber distance measurement system 6 .

[0025] An optical fiber distance measurement system 6 is respectively provided at both ends of each optical fiber 8, and the two ends of the optical fiber 8 are respectively connected to the optical fiber distance measurement system 6 on the corresponding side.

[0026] Four optical fibers 8 are evenly distributed on the outer wall of the slurry conveying pipeline 9 along the length direction of the slurry conveying pipeline 9. Four sets of optical fiber ranging systems 6 are respectively arranged at both ends of the slurry conveying pipeline 9, and one end of each optical fiber 8 is connected to a set of optical fiber ranging systems 6 on the same side.

[0027] The optical fiber 8 is a single-mode multi-core ribbon optical fiber, the CPU central processor 1 is an industrial PLC, the optical transmission equipment 5 is SDH, and the optical fiber distance measurement system 6 is an OTDR.

[0028] The terminal data processing platform 2 is a desktop computer.

[0029] The second technical solution adopted by the present invention is a method for detecting pipeline leakage by photoelectric signals, which adopts the above-mentioned device for detecting pipeline leakage by photoelectric signals, specifically: each optical fiber ranging system 6 measures the distance of the connected optical fiber 8 in real time and continuously, and the measured data is transmitted to the optical transmission device 5 and the network switch 4 in turn through the data connection line 7. The network switch 4 transmits the data to the terminal data processing platform 2 and finally transmits it to the terminal data processing platform 2. The real-time status of the optical fiber 8 outside the pipeline is displayed on the display screen of the terminal data processing platform 2. Under normal conditions, a complete pipeline ring network structure diagram will be formed on the display screen of the terminal data processing platform 2. Green can be used to indicate that the optical fiber is in a normal connected communication state. If a leak occurs at position k on one side of the slurry conveying pipeline 9, the slurry pressure at the leakage position will impact the optical fiber 8 surrounding the outside of the slurry conveying pipeline 9, causing the optical fiber 8 to be disconnected at position k. At this time, the data measured by the optical fiber ranging system 6 will change. The changed distance data is processed by the terminal data processing platform 2 and finally displayed on the display screen. The break point of the optical fiber 8 outside the pipeline can be displayed in red. The user can accurately and timely determine the location of the pipeline leakage point according to the communication status of the ring network optical fiber 8 outside the slurry conveying pipeline 9 displayed in real time on the display screen.

[0030] The data processing process of the terminal data processing platform 2 is:

[0031] The photoelectric detection system 6 is proportionally reduced on the terminal data processing platform 2. Specifically, assuming that a is the length of the slurry delivery pipeline 9, b is the length of each optical fiber 8 on the slurry delivery pipeline 9, and c is the length of the slurry delivery pipeline 9 after the terminal data processing platform 2 is proportionally reduced, the length of the optical fiber 8 after the proportional reduction is When a leak occurs at position k on one side of the slurry delivery pipeline 9, the high pressure of the slurry will cause the optical fiber 8 at the leaking position to be disconnected. At this time, the real-time data measured by the optical fiber distance measurement system 6 will change, and the display screen of the terminal data processing platform 2 will display the optical fiber distance from the normal state to the current state. The length is shortened to The optical fiber distance measurement system 6 connected to the corresponding optical fiber 8 on the other side of the slurry delivery pipeline 9 measures data n, and the normal distance of the optical fiber from back to front is shown on the display screen. After the data is calculated, the actual position of the break point can be intuitively displayed on the display screen, where the actual distance of the optical fiber is in km, and the display screen of the terminal data processing platform 2 displays the length in mm.

Claims

1. A device for detecting pipeline leakage using photoelectric signals, characterized in that: It comprises an optical fiber distance measurement system (6) connected to a slurry conveying pipeline (9) via an optical fiber (8), the optical fiber distance measurement system (6) being connected to an optical transmission device (5) via an optical fiber, the optical transmission device (5) being connected to a network switch (4) via a data connection line (7), and the network switch (4) being respectively connected to a CPU central processing unit (1), a terminal data processing platform (2) and a data server (3) via the data connection line (7); A plurality of optical fibers (8) are evenly distributed on the outer wall of the slurry conveying pipeline (9) along the length direction of the slurry conveying pipeline (9), and both ends of the optical fibers (8) are connected to the optical fiber distance measurement system (6); An optical fiber distance measurement system (6) is respectively provided at both ends of each optical fiber (8), and the two ends of the optical fiber (8) are respectively connected to the optical fiber distance measurement system (6) on the corresponding side; Methods for detecting pipeline leaks, specifically: Each of the optical fiber distance measurement systems (6) measures the distance of the connected optical fiber (8) in real time and continuously. The measured data is transmitted to the optical transmission device (5) and the network switch (4) in sequence through the data connection line (7). The network switch (4) transmits the data to the terminal data processing platform (2) and finally transmits the data to the terminal data processing platform (2). The real-time status of the optical fiber (8) outside the pipeline is displayed on the display screen of the terminal data processing platform (2). If a leak occurs at position k on one side of the slurry conveying pipeline (9), the slurry pressure at the leaking position will impact the optical fiber (8) surrounding the outside of the slurry conveying pipeline (9), causing the optical fiber (8) to be disconnected at position k. At this time, the data measured by the optical fiber distance measurement system (6) will change. The changed distance data is processed by the terminal data processing platform (2) and finally displayed on the display screen. The user can accurately and timely determine the location of the pipeline leakage point based on the communication status of the ring network optical fiber (8) outside the slurry conveying pipeline (9) displayed in real time on the display screen. The data processing process of the terminal data processing platform (2) is as follows: The photoelectric detection system is proportionally reduced on the terminal data processing platform (2). Specifically, assuming that a is the length of the slurry delivery pipeline (9), b is the length of each optical fiber (8) on the slurry delivery pipeline (9), and c is the length of the slurry delivery pipeline (9) after the terminal data processing platform (2) is proportionally reduced, then the length of the optical fiber (8) after the proportional reduction is When a leak occurs at position k on one side of the slurry delivery pipeline (9), the high pressure of the slurry will cause the optical fiber (8) at the leaking position to be disconnected. At this time, the real-time data measured by the optical fiber distance measurement system (6) will change, and the display screen of the terminal data processing platform (2) will display the optical fiber distance from the normal state to the current state. The length is shortened to The other side of the slurry delivery pipeline (9) is connected to the optical fiber distance measurement system (6) of the corresponding optical fiber (8), and the measurement data is n. The normal distance of the optical fiber from back to front is displayed on the display screen. After the data is calculated, the actual position of the breaking point can be intuitively displayed on the display screen.

2. The device for detecting pipeline leakage by photoelectric signal according to claim 1 is characterized in that: Four optical fibers (8) are evenly distributed on the outer wall of the slurry conveying pipeline (9) along the length direction of the slurry conveying pipeline (9), and four sets of optical fiber distance measurement systems (6) are respectively arranged at both ends of the slurry conveying pipeline (9), and one end of each optical fiber (8) is connected to a set of optical fiber distance measurement systems (6) on the same side.

3. The device for detecting pipeline leakage by photoelectric signal according to any one of claims 1-2, characterized in that: The optical fiber (8) is a single-mode multi-core ribbon optical fiber.

4. The device for detecting pipeline leakage by photoelectric signals according to any one of claims 1 to 2, wherein the terminal data processing platform (2) is a desktop computer.

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