A GIL expansion joint state simulation detection device based on laser detection

Abstract

The present application discloses a GIL expansion joint state simulation detection device based on laser detection, including: an expansion joint, two sections of GIL pipelines, a plurality of automatic trackers, a horizontal photoacoustic generator, a vertical photoacoustic generator, a horizontal photoacoustic receiver, a vertical photoacoustic receiver and a processor; both ends of the expansion joint are respectively connected to the two sections of GIL pipelines; the horizontal photoacoustic generator is arranged on the side of a section of GIL pipeline in the horizontal direction; the vertical photoacoustic generator is arranged at the top or bottom of a section of GIL pipeline in the vertical direction; the automatic tracker is used to keep the signal emission directions of the horizontal photoacoustic generator and the vertical photoacoustic generator constant; the processor is used to calculate the distance between the horizontal photoacoustic generator and the horizontal photoacoustic receiver and the distance between the vertical photoacoustic generator and the vertical photoacoustic receiver according to the emission and reception times of the laser and ultrasonic signals. This solution can simulate the deformation state of the expansion joint on the GIL pipeline.

Description

Technical Field

[0001] This application relates to the technical field of GIL operation and maintenance, and particularly to a GIL expansion joint state simulation detection device based on laser detection. Background Art

[0002] GIL is an important part of the power transmission line, with characteristics such as large transmission capacity, low unit loss, flexible layout, and high operation reliability, and is widely used in the power system. However, the working environment where long-distance GIL is located is complex, and axial deformation of GIL may be caused by foundation settlement, mechanical vibration, construction interference, etc., which may cause the busbar to bend and expand, resulting in leakage of internal insulating gas, and having a greater impact on the mechanical and electrical reliability of GIL. Therefore, the flexible GIL technology has been developed, that is, expansion joints are added between GIL gas chambers to compensate for the deformation of GIL.

[0003] In the application process of the existing expansion joints, there is often a lack of detection of their deformation states, so the severity of the deformation of the expansion joints cannot be quantitatively obtained, and thus the structure of the expansion joints cannot be adjusted and optimized. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a GIL expansion joint state simulation detection device based on laser detection to solve the problem that the existing GIL expansion joints lack deformation state detection.

[0005] To achieve the above technical purpose, this application provides a GIL expansion joint state simulation detection device based on laser detection, including: an expansion joint, two sections of GIL pipelines, multiple automatic trackers, a horizontal photoacoustic generator, a vertical photoacoustic generator, a horizontal photoacoustic receiver, a vertical photoacoustic receiver, and a processor;

[0006] Both ends of the expansion joint are respectively connected to the two sections of GIL pipelines;

[0007] The horizontal photoacoustic generator is arranged on the side of one section of the GIL pipeline in the horizontal direction, and is used to generate laser and ultrasonic signals with constant wavelength and power;

[0008] The horizontal photoacoustic receiver is arranged on the other section of the GIL pipeline corresponding to the position of the horizontal photoacoustic generator, and is used to receive the laser and ultrasonic signals of the horizontal photoacoustic generator;

[0009] The vertical photoacoustic generator is arranged at the top or bottom of one section of the GIL pipeline in the vertical direction, and is used to generate laser and ultrasonic signals with constant wavelength and power;

[0010] The vertical photoacoustic receiver is arranged on the other section of the GIL pipeline corresponding to the position of the vertical photoacoustic generator, and is used to receive the laser and ultrasonic signals of the vertical photoacoustic generator;

[0011] The horizontal photoacoustic generator, the vertical photoacoustic generator, the horizontal photoacoustic receiver and the vertical photoacoustic receiver are all connected to the GIL pipeline through the automatic tracker;

[0012] The automatic tracker is used to keep the signal emission directions of the horizontal photoacoustic generator and the vertical photoacoustic generator constant, and to keep the signal reception directions of the horizontal photoacoustic receiver and the vertical photoacoustic receiver constant;

[0013] The processor is electrically connected to the horizontal photoacoustic generator, the vertical photoacoustic generator, the horizontal photoacoustic receiver and the vertical photoacoustic receiver, and is used to calculate the distance between the horizontal photoacoustic generator and the horizontal photoacoustic receiver and the distance between the vertical photoacoustic generator and the vertical photoacoustic receiver according to the emission and reception times of the laser and ultrasonic signals.

[0014] Further, the automatic tracker includes: a counterweight and a connecting column;

[0015] The first end of the connecting column is fixedly connected to the GIL pipeline;

[0016] The horizontal photoacoustic generator, the vertical photoacoustic generator, the horizontal photoacoustic receiver and the vertical photoacoustic receiver are rotatably connected to the second ends of different connecting columns in the vertical direction;

[0017] Counterweights are arranged at the bottoms of the horizontal photoacoustic generator, the vertical photoacoustic generator, the horizontal photoacoustic receiver and the vertical photoacoustic receiver.

[0018] Further, the automatic tracker further includes: a fixing ring;

[0019] The fixing ring is fixedly connected to the GIL pipeline;

[0020] The connecting column is arranged inside the fixing ring, and the first end of the connecting column is fixedly connected to the GIL pipeline through the fixing ring.

[0021] Further, the automatic tracker includes two connecting columns;

[0022] The second ends of the two connecting columns are spaced apart inside the fixing ring;

[0023] The horizontal photoacoustic generator, the vertical photoacoustic generator, the horizontal photoacoustic receiver and the vertical photoacoustic receiver are all arranged inside the fixing ring and are simultaneously connected to the two connecting columns.

[0024] Further, both the horizontal photoacoustic generator and the horizontal photoacoustic receiver include a plurality of them, and are respectively arranged on both sides of the GIL pipeline.

[0025] Further, the vertical photoacoustic generator is disposed at the bottom of the GIL pipeline.

[0026] Further, the expansion joint is hermetically connected to the GIL pipeline through a flange.

[0027] Further, the flange is made of aluminum material.

[0028] Further, the horizontal photoacoustic generator uses red light and the acoustic signal frequency is 20 kHz.

[0029] Further, the vertical photoacoustic generator uses green light and the acoustic signal frequency is 20 kHz.

[0030] As can be seen from the above technical solutions, the present application provides a GIL expansion joint state simulation detection device based on laser detection, including: an expansion joint, two sections of GIL pipelines, a plurality of automatic trackers, a horizontal photoacoustic generator, a vertical photoacoustic generator, a horizontal photoacoustic receiver, a vertical photoacoustic receiver, and a processor; both ends of the expansion joint are respectively connected to the two sections of the GIL pipelines; the horizontal photoacoustic generator is disposed at the side of one section of the GIL pipeline in the horizontal direction for generating a laser and an ultrasonic signal with a constant wavelength and power; the horizontal photoacoustic receiver is disposed on the other section of the GIL pipeline corresponding to the position of the horizontal photoacoustic generator for receiving the laser and the ultrasonic signal of the horizontal photoacoustic generator; the vertical photoacoustic generator is disposed at the top or bottom of one section of the GIL pipeline in the vertical direction for generating a laser and an ultrasonic signal with a constant wavelength and power; the vertical photoacoustic receiver is disposed on the other section of the GIL pipeline corresponding to the position of the vertical photoacoustic generator for receiving the laser and the ultrasonic signal of the vertical photoacoustic generator; the horizontal photoacoustic generator, the vertical photoacoustic generator, the horizontal photoacoustic receiver, and the vertical photoacoustic receiver are all connected to the GIL pipeline through the automatic tracker; the automatic tracker is used to keep the signal emission direction of the horizontal photoacoustic generator and the vertical photoacoustic generator constant, and is used to keep the signal reception direction of the horizontal photoacoustic receiver and the vertical photoacoustic receiver constant; the processor is electrically connected to the horizontal photoacoustic generator, the vertical photoacoustic generator, the horizontal photoacoustic receiver, and the vertical photoacoustic receiver, and is used to calculate the distance between the horizontal photoacoustic generator and the horizontal photoacoustic receiver and the distance between the vertical photoacoustic generator and the vertical photoacoustic receiver according to the emission and reception times of the laser and the ultrasonic signal. The GIL expansion joint state simulation detection device based on laser detection provided by this solution can simulate the deformation state of the expansion joint on the GIL pipeline, thereby evaluating the mechanical properties of the GIL pipeline and the expansion joint, and effectively solving the problem that the existing GIL expansion joint lacks deformation state detection. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0032] Figure 1 Schematic diagram of the overall structure of a GIL expansion joint state simulation detection device based on laser detection provided by an embodiment of the present application when not deformed;

[0033] Figure 2 Schematic diagram of the overall structure of a GIL expansion joint state simulation detection device based on laser detection provided by an embodiment of the present application when deformed;

[0034] Figure 3 Schematic diagram of the automatic tracker of a GIL expansion joint state simulation detection device based on laser detection provided by an embodiment of the present application. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions of the embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope claimed by the present application.

[0036] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a replaceable 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. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0038] Please refer to Figures 1 to 2 , a GIL expansion joint state simulation detection device based on laser detection provided in an embodiment of the present application, comprising: an expansion joint 1, two sections of GIL pipes 2, a plurality of automatic trackers 3, a horizontal photoacoustic generator 4, a vertical photoacoustic generator 5, a horizontal photoacoustic receiver 6, a vertical photoacoustic receiver 7, and a processor; both ends of the expansion joint 1 are respectively connected to the two sections of GIL pipes 2; the horizontal photoacoustic generator 4 is arranged on the side of one section of the GIL pipe 2 in the horizontal direction, and is used for generating a laser and an ultrasonic signal with a constant wavelength and power; the horizontal photoacoustic receiver 6 is arranged on the other section of the GIL pipe 2 corresponding to the position of the horizontal photoacoustic generator 4, and is used for receiving the laser and ultrasonic signal of the horizontal photoacoustic generator 4; the vertical photoacoustic generator 5 is arranged at the top or bottom of one section of the GIL pipe 2 in the vertical direction, and is used for generating a laser and an ultrasonic signal with a constant wavelength and power; the vertical photoacoustic receiver 7 is arranged on the other section of the GIL pipe 2 corresponding to the position of the vertical photoacoustic generator 5, and is used for receiving the laser and ultrasonic signal of the vertical photoacoustic generator 5; the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6, and the vertical photoacoustic receiver 7 are all connected to the GIL pipe 2 through the automatic tracker 3; the automatic tracker 3 is used for keeping the signal emission direction of the horizontal photoacoustic generator 4 and the vertical photoacoustic generator 5 constant, and for keeping the signal reception direction of the horizontal photoacoustic receiver 6 and the vertical photoacoustic receiver 7 constant; the processor is electrically connected to the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6, and the vertical photoacoustic receiver 7, and is used for calculating the distance between the horizontal photoacoustic generator 4 and the horizontal photoacoustic receiver 6 and the distance between the vertical photoacoustic generator 5 and the vertical photoacoustic receiver 7 according to the emission and reception times of the laser and ultrasonic signals.

[0039] In this embodiment, both ends of the expansion joint 1 are respectively connected to the two sections of GIL pipes 2, which can simulate the structure of the actual GIL expansion joint. The processor can measure the distance between the horizontal photoacoustic generator 4 and the horizontal photoacoustic receiver 6 by obtaining the time difference between the time when the horizontal photoacoustic generator 4 sends the laser and ultrasonic signals and the time when the horizontal photoacoustic receiver 6 receives the laser and ultrasonic signals; similarly, the distance between the vertical photoacoustic generator 5 and the vertical photoacoustic receiver 7 can be measured in the same way. Moreover, through the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6, and the vertical photoacoustic receiver 7, laser and ultrasonic signals can be respectively emitted from the positions in the horizontal and vertical directions of the GIL pipe 2, so that the measured spacing by the processor can better simulate the deformation conditions of the GIL pipe 2 and the expansion joint 1.

[0040] Meanwhile, an automatic tracker 3 is also provided in this solution, so that the orientations of the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6 and the vertical photoacoustic receiver 7 are constant. Specifically, the orientations of the horizontal photoacoustic generator 4 and the horizontal photoacoustic receiver 6 are opposite; the orientations of the vertical photoacoustic generator 5 and the vertical photoacoustic receiver 7 are opposite. The automatic tracker 3 can adopt methods such as a gyroscope, without limitation.

[0041] In order to better simulate the deformation state of the expansion joint 1, in one embodiment, the horizontal photoacoustic generator 4 and the horizontal photoacoustic receiver 6 can include multiple ones, and are respectively arranged on both sides of the GIL pipeline 2, so as to more accurately measure the deformation conditions on both sides of the GIL pipeline 2 and the expansion joint 1.

[0042] In another embodiment, the vertical photoacoustic generator 5 is arranged at the bottom of the GIL pipeline 2, which can avoid the interference between the vertical photoacoustic generator 5 and the vertical photoacoustic receiver 7 and the GIL pipeline 2 when the expansion joint 1 deforms into an upward protruding structure.

[0043] In a more specific embodiment, the automatic tracker 3 includes: a counterweight 31 and a connecting column 32; the first end of the connecting column 32 is fixedly connected to the GIL pipeline 2; the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6 and the vertical photoacoustic receiver 7 are rotatably connected to the second ends of different connecting columns 32 in the vertical direction; counterweights 31 are arranged at the bottoms of the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6 and the vertical photoacoustic receiver 7.

[0044] Specifically, the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6 and the vertical photoacoustic receiver 7 are all connected to the GIL pipeline 2 through the connecting column 32, and the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6 and the vertical photoacoustic receiver 7 can be connected to the connecting column 32 through a universal joint. Cooperating with the counterweight 31, when the GIL pipeline 2 bends and deforms, the counterweight 31 can be kept directly below the generator or the receiver, so as to keep the orientations of the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6 and the vertical photoacoustic receiver 7 constant.

[0045] In another embodiment, please refer to Figure 3 , the automatic tracker 3 further includes: a fixing ring 33; the fixing ring 33 is fixedly connected to the GIL pipeline 2; the connecting column 32 is arranged inside the fixing ring 33, and the first end of the connecting column 32 is fixedly connected to the GIL pipeline 2 through the fixing ring 33.

[0046] Specifically, the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6, and the vertical photoacoustic receiver 7 are all arranged inside the fixed ring 33. The fixed ring 33 can protect the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6, and the vertical photoacoustic receiver 7. At the same time, the fixed ring 33 is a hollow sleeve, and its opening direction is consistent with the orientation of the generator or the receiver, avoiding the interference of signal transmission.

[0047] Furthermore, the automatic tracker 3 includes two connecting columns 32; the second ends of the two connecting columns 32 are arranged at intervals inside the fixed ring 33; the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6, and the vertical photoacoustic receiver 7 are all arranged inside the fixed ring 33 and are simultaneously connected to the two connecting columns 32.

[0048] Specifically, the horizontal photoacoustic generator 4, the vertical photoacoustic generator 5, the horizontal photoacoustic receiver 6, and the vertical photoacoustic receiver 7 are all arranged between the two connecting columns 32, so that the connection structure is more stable.

[0049] In one embodiment, the expansion joint 1 is hermetically connected to the GIL pipeline 2 through a flange 8.

[0050] The flange 8 can be made of aluminum material with a thickness of 10 cm. The expansion joint 1 can deform freely, the length of the deformation area is 50 cm, and the maximum deformation amount is 10 cm, which can simulate the deformation state of the expansion joint in the actual GIL. The GIL pipeline 2 simulates the structure of the actual UHV GIL transmission line and adopts an aluminum structure with a diameter of 88 cm and a thickness of 8 mm.

[0051] Furthermore, the horizontal photoacoustic generator 4 uses red light and the acoustic signal frequency is 20 kHz. The vertical photoacoustic generator 5 uses green light and the acoustic signal frequency is 20 kHz.

[0052] By setting the horizontal photoacoustic generator 4 and the vertical photoacoustic generator 5 to use different light colors, it is convenient to distinguish between the two.

[0053] A GIL expansion joint state simulation detection device based on laser detection according to the present invention can monitor the deformation state of the expansion joint 1 in real time and alarm for the working conditions of serious deformation, which is beneficial to evaluating the mechanical state of the GIL and preventing the influence of mechanical deformation on the electrical performance of the GIL.

[0054] The above are the preferred embodiments of the present application and are not intended to limit the present invention. Although the present application has been described in detail with reference to the examples, those skilled in the art can still modify the technical solutions described in the foregoing examples, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A state simulation detection device for GIL expansion joints based on laser detection, characterized in that, it includes: an expansion joint (1), two sections of GIL pipelines (2), multiple automatic trackers (3), a horizontal photoacoustic generator (4), a vertical photoacoustic generator (5), a horizontal photoacoustic receiver (6), a vertical photoacoustic receiver (7) and a processor; Both ends of the expansion joint (1) are respectively connected to the two sections of the GIL pipeline (2); The horizontal photoacoustic generator (4) is arranged on the side of one section of the GIL pipeline (2) in the horizontal direction, and is used to generate laser and ultrasonic signals with constant wavelength and power; The horizontal photoacoustic receiver (6) is arranged on the other section of the GIL pipeline (2) corresponding to the position of the horizontal photoacoustic generator (4), and is used to receive the laser and ultrasonic signals of the horizontal photoacoustic generator (4); The vertical photoacoustic generator (5) is arranged at the top or bottom of one section of the GIL pipeline (2) in the vertical direction, and is used to generate laser and ultrasonic signals with constant wavelength and power; The vertical photoacoustic receiver (7) is arranged on the other section of the GIL pipeline (2) corresponding to the position of the vertical photoacoustic generator (5), and is used to receive the laser and ultrasonic signals of the vertical photoacoustic generator (5); The horizontal photoacoustic generator (4), the vertical photoacoustic generator (5), the horizontal photoacoustic receiver (6) and the vertical photoacoustic receiver (7) are all connected to the GIL pipeline (2) through the automatic tracker (3); The automatic tracker (3) is used to keep the signal emission direction of the horizontal photoacoustic generator (4) and the vertical photoacoustic generator (5) constant, and is used to keep the signal reception direction of the horizontal photoacoustic receiver (6) and the vertical photoacoustic receiver (7) constant; The processor is electrically connected to the horizontal photoacoustic generator (4), the vertical photoacoustic generator (5), the horizontal photoacoustic receiver (6) and the vertical photoacoustic receiver (7), and is used to calculate the distance between the horizontal photoacoustic generator (4) and the horizontal photoacoustic receiver (6) and the distance between the vertical photoacoustic generator (5) and the vertical photoacoustic receiver (7) according to the emission and reception times of the laser and ultrasonic signals; The automatic tracker (3) includes: a counterweight (31), a fixing ring (33) and two connecting columns (32); The first end of the connecting column (32) is fixedly connected to the GIL pipeline (2); The second ends of the two connecting columns (32) are arranged at intervals within the fixing ring (33); The horizontal photoacoustic generator (4), the vertical photoacoustic generator (5), the horizontal photoacoustic receiver (6) and the vertical photoacoustic receiver (7) are rotatably connected to the second ends of different connecting columns (32) in the vertical direction; Counterweights (31) are arranged at the bottoms of the horizontal photoacoustic generator (4), the vertical photoacoustic generator (5), the horizontal photoacoustic receiver (6) and the vertical photoacoustic receiver (7); The fixing ring (33) is fixedly connected to the GIL pipeline (2); The connecting column (32) is arranged inside the fixing ring (33), and the first end of the connecting column (32) is fixedly connected to the GIL pipeline (2) through the fixing ring (33); The horizontal photoacoustic generator (4), the vertical photoacoustic generator (5), the horizontal photoacoustic receiver (6) and the vertical photoacoustic receiver (7) are all arranged inside the fixing ring (33) and are simultaneously connected to the two connecting columns (32).

2. The GIL expansion joint state simulation detection device based on laser detection according to claim 1, characterized in that, Both the horizontal photoacoustic generator (4) and the horizontal photoacoustic receiver (6) include a plurality of them, and are respectively arranged on both sides of the GIL pipeline (2).

3. The GIL expansion joint state simulation detection device based on laser detection according to claim 1 or 2, characterized in that, The vertical photoacoustic generator (5) is arranged at the bottom of the GIL pipeline (2).

4. The GIL expansion joint state simulation detection device based on laser detection according to claim 1, characterized in that, The expansion joint (1) is hermetically connected to the GIL pipeline (2) through a flange (8).

5. The GIL expansion joint state simulation detection device based on laser detection according to claim 4, characterized in that, The flange (8) is made of aluminum material.

6. The GIL expansion joint state simulation detection device based on laser detection according to claim 1, characterized in that, The horizontal photoacoustic generator (4) uses red light and the acoustic signal frequency is 20 kHz.

7. The GIL expansion joint state simulation detection device based on laser detection according to claim 6, characterized in that, The vertical photoacoustic generator (5) uses green light and the acoustic signal frequency is 20 kHz.

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