Detection method suitable for independent circuit breaker in electrified state above 500kV

Abstract

The invention discloses a detection method suitable for an independent circuit breaker in a live-line state above 500kV, and relates to the technical field of circuit breaker detection. The detection method of the independent circuit breaker suitable for the electrified state above 500kV comprises the following steps: installing an X-ray detector at a first preset position at the bottom of the circuit breaker; mounting the imaging plate at a second preset position on the top of the circuit breaker; x-ray beams are emitted to the circuit breaker through the X-ray detector, and the X-ray beams penetrating through the circuit breaker are emitted to the imaging plate; x-ray image information is collected through an imaging plate and converted into a digital signal; the digital signal is sent to a PC terminal through a transmission device, and an image of the internal mechanical part of the circuit breaker is obtained. In the whole detection process, a person does not need to approach the electrified circuit breaker, and the high voltage of the circuit breaker does not influence the detection equipment, so that the detection method can improve the accuracy of detecting the state of the mechanical parts in the circuit breaker under the condition of no power failure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breaker detection, and in particular to a detection method for an independent circuit breaker in an electrified state of 500 kV or above. BACKGROUND

[0002] As a key equipment of the power grid, the independent circuit breaker is inevitably subject to defects such as screw loosening, contact damage, and insulation aging under the action of high voltage and large current for a long time. However, due to the sealing structure of the circuit breaker, the state of the internal mechanical components is difficult to directly observe. If the circuit breaker is operated in an electrified state with defects, there is a risk of equipment explosion and power grid shutdown. To ensure the safe operation of the power grid, the current industry generally relies on regular power-off maintenance to assess the equipment state through disassembly inspection or offline testing. However, this method has the problems of long maintenance cycle and high cost. With the advancement of smart grid construction, the operation state maintenance mode of electrical equipment requires the development of no-power detection technology.

[0003] There are some existing technologies for detecting circuit breakers through X-ray, such as the invention patent with publication number CN104567756B, which discloses a method for imaging detection of the insertion depth of the opening and closing contact of a high-voltage circuit breaker. The steps include: 1) marking the imaging position area between the opening contact and the arc initiation contact on the sleeve of the circuit breaker to be detected; 2) in the closed state, using a digital radiographic imaging detection system to perform X-ray imaging on the imaging position area to obtain a detection image; 3) obtaining the break distance L between the opening contact and the arc initiation contact in the detection image, and determining whether the break distance L meets the design requirements of the high-voltage circuit breaker to be detected. If it meets the requirements, it is determined that the insertion depth of the opening and closing contact is qualified, otherwise it is determined that the insertion depth of the opening and closing contact is unqualified. The present application can quantitatively reflect the insertion of the opening and closing contact of the high-voltage circuit breaker, and can clearly display the internal structure of the circuit breaker after closing, especially the relative position of the internal moving and stationary contacts, and can timely discover defects caused by insufficient insertion depth of the opening and closing contact.

[0004] The existing detection methods mainly have two types. One is the no-power detection for circuit breakers in GIS (the background technology of the above-mentioned document discloses that the circuit breaker adopts a fully enclosed and SF6 gas-filled insulation structure), and all electrified parts in GIS are sealed inside the tank, and the GIS shell is grounded, so the detector or detection instrument will not be electrified when approaching the GIS.

[0005] Another is the detection of independent circuit breaker. If the independent circuit breaker is in the state of no electricity, the imaging plate can be fixed on the top of the circuit breaker by manual, and the X-ray device is placed below the circuit breaker, so that the internal structure of the circuit breaker after the opening and closing of the circuit breaker can be safely completed, especially the relative position of the internal moving and static contacts, so that the defects caused by the insufficient insertion depth of the opening and closing contact can be found in time. However, due to the strict limitation of the power grid safety operation on the power-off time of the equipment, and the complex and tedious procedures and operation steps of the circuit breaker each time, the progress of the X-ray detection of the internal structure of the power-off circuit breaker is greatly limited.

[0006] If the power grid is in normal operation, the circuit breaker is in the state of electricity, and when the independent circuit breaker is detected by X-ray, if the distance between the detection personnel or detection instrument and the independent circuit breaker is less than the safety distance (see 5.2.2 of “Electric Power Safety Work Procedure GB26860-2011”), the power grid accident will occur, the power grid will be automatically powered off, and great economic loss will be caused, for example, the power-off influence range of 500kV system is more than 200 square kilometers, and the loss amount is about 1.2 million to 5 million yuan; at the same time, the live independent circuit breaker will cause damage to the detection personnel and the detection instrument.

[0007] In view of the defects of the above several detection methods, we urgently need to find a method for detecting the internal structure of the independent circuit breaker under the condition of live detection. SUMMARY

[0008] In view of the defects in the prior art, the technical problem solved by the present application is how to improve the accuracy of detecting the internal mechanical parts of the circuit breaker without power-off.

[0009] In order to achieve the above purpose, the detection method for the independent circuit breaker in the state of 500kV or more provided by the present application comprises the following steps: A plurality of measuring points are preset on the circuit breaker; The X-ray detector is moved to the first preset position at the bottom of the circuit breaker by the first moving device; The imaging plate is moved to the second preset position at the top of the circuit breaker by the unmanned aerial vehicle; The X-ray detector is controlled by the PC terminal to emit X-ray beam to the circuit breaker, and the X-ray beam penetrating the circuit breaker is shot on the imaging plate; The X-ray image information is collected by the imaging plate and converted into digital signals; The digital signals are sent to the PC terminal by the transmission device to obtain the image of the internal mechanical parts of the circuit breaker; The first moving device and the unmanned aerial vehicle are controlled by the PC terminal to detect another measuring point.

[0010] By adopting the technical scheme, the X-ray detector is moved to the first preset position through the first moving device, and the imaging plate is moved to the second preset position through the unmanned aerial vehicle, so that a safe distance is kept between the X-ray detector and the live circuit breaker and between the imaging plate and the live circuit breaker, that is, the live independent circuit breaker does not cause damage to the detection equipment; the connection between the X-ray detector and the imaging plate passes through the measuring point on the circuit breaker, the X-ray detector emits an X-ray beam to the measuring point of the circuit breaker, the X-ray beam will penetrate the circuit breaker and finally shoot on the imaging plate, the obtained digital signal is sent to the PC terminal, and the internal mechanical component image at the measuring point of the circuit breaker is displayed on the PC terminal; the first moving device and the unmanned aerial vehicle can be directly controlled through the PC terminal, and the X-ray detector can be controlled to work, and in the whole detection process, no one needs to approach the live circuit breaker, and the high voltage of the circuit breaker will not cause damage to the detection equipment, so that the detection method can improve the accuracy of detecting the internal mechanical component state of the circuit breaker without power off.

[0011] In an embodiment, an axial deviation between the X-ray source of the X-ray detector and the imaging plate is less than a first preset deviation.

[0012] By adopting the technical scheme, in order to improve the imaging on the imaging plate to be clearer and more accurate, the X-ray beam needs to be irradiated at the measuring point and penetrate the imaging plate, so the above design is made.

[0013] In an embodiment, the X-ray detector is moved to the first preset position at the bottom of the circuit breaker through the first moving device, specifically including: A moving track is arranged at the area of the bottom of the circuit breaker; A moving vehicle is installed on the moving track, so that the moving vehicle can move along the moving track; The X-ray detector is installed on the moving vehicle; The X-ray detector is moved to the first preset position through the moving vehicle.

[0014] By adopting the technical scheme, when the connection between the X-ray detector and the imaging plate passes through the measuring point and is perpendicular to the straight line at the measuring point, the imaging effect is optimal, so the moving vehicle is designed to drive the X-ray detector to move in the horizontal direction, thereby further improving the detection accuracy of all measuring points.

[0015] In an embodiment, the X-ray detector is installed on the moving vehicle, specifically including: An angle adjusting assembly is installed on the top of the moving vehicle, and the X-ray detector is installed on the angle adjusting assembly; An angle sensor is arranged on the moving vehicle; The first angle information of the main optical axis of the X-ray source and the straight line of the measuring points is collected by the angle sensor, wherein the straight line of the measuring points is a straight line passing through the measuring points on the surface of the circuit breaker; The orientation of the main optical axis of the X-ray source is adjusted by the angle adjusting assembly, so that the deviation of the first angle information from 90° is less than the second preset deviation.

[0016] By adopting the above technical solution, when the circuit breaker is located on the slope, the orientation of the main optical axis of the X-ray source is upward, and in order to ensure the accuracy of detection, the orientation of the main optical axis of the X-ray source is adjusted by the angle adjusting assembly, and the first angle information is detected by the angle sensor, thereby ensuring the accuracy of detection. At the same time, the detection method can be applied to more scenes.

[0017] In an embodiment, the axial deviation between the X-ray source and the imaging plate of the X-ray detector is less than a first preset deviation, specifically comprising: The second angle information of the main optical axis of the X-ray source and the vertical axis of the imaging plate is collected by the angle sensor; The imaging plate is rotated with its transverse axis as the center axis until the second angle information is less than the first preset deviation.

[0018] By adopting the above technical solution, the angle sensor can not only collect the first angle information of the main optical axis of the X-ray source and the straight line of the measuring points, but also collect the second angle information of the main optical axis of the X-ray source and the vertical axis of the imaging plate, thereby further ensuring the accuracy of detection.

[0019] In an embodiment, the X-ray detector is installed on a mobile vehicle, specifically comprising: A lifting assembly is installed on the top of the mobile vehicle, and the X-ray detector is installed on the lifting assembly; A distance sensor is arranged on the mobile vehicle; The first distance information between the X-ray detector and the measuring points of the circuit breaker is collected by the distance sensor; The height of the X-ray detector is adjusted by the lifting assembly until the X-ray detector moves to a first preset position.

[0020] By adopting the above technical solution, the height of the X-ray detector is adjusted by the lifting assembly, so that the X-ray detector and the live circuit breaker maintain a sufficient safety distance, avoiding forming a loop with the ground, which affects the X-ray detector. The greater the voltage, the farther the interval needs to be, so that it can be applied to the detection of circuit breakers of different voltages. The first distance information between the X-ray detector and the measuring points of the circuit breaker is collected by the distance sensor, further ensuring that the distance is above the safety distance.

[0021] In an embodiment, the detection method further comprises: Collecting second distance information between the X-ray detector and the imaging plate through the distance sensor; Obtaining third distance information between the imaging plate and the circuit breaker measuring point through the first distance information and the second distance information; Adjusting the height of the imaging plate according to the third distance information until the imaging plate moves to the second preset position.

[0022] By adopting the above technical solution, the imaging plate and the circuit breaker measuring point maintain a sufficient safety distance, avoiding forming a loop with the ground and affecting the imaging plate.

[0023] In an embodiment, the imaging plate is peripherally sleeved with an insulation protection assembly, which comprises an outer shell and a frame fixedly arranged on the inner wall of the outer shell, the frame being sleeved on the edge of the imaging plate, both surfaces of the imaging plate abutting against the inner wall of the outer shell, and the bottom of the outer shell being provided with a detection window for allowing the X-ray beam to be shot onto the imaging plate.

[0024] By adopting the above technical solution, it is further ensured that the imaging plate is not affected by the current on the circuit breaker.

[0025] In an embodiment, the material of the insulation protection assembly is selected from epoxy resin or polytetrafluoroethylene.

[0026] By adopting the above technical solution, different insulation materials can be selected according to the insulation effect and cost.

[0027] In an embodiment, the top of the outer shell is provided with a connecting assembly for detachable connection with the unmanned aerial vehicle.

[0028] By adopting the above technical solution, the position of the imaging plate can be adjusted, and the outer shell can also be prevented from falling off the mobile device.

[0029] In summary, the present application has at least one of the following beneficial technical effects: 1. By moving the X-ray detector to a first preset position via a first moving device and moving the imaging plate to a second preset position via a drone, a safe distance is maintained between the X-ray detector and the energized circuit breaker, and between the imaging plate and the energized circuit breaker. This ensures that the energized independent circuit breaker will not damage the detection equipment. The connection between the X-ray detector and the imaging plate passes through a measuring point on the circuit breaker. The X-ray detector emits an X-ray beam towards the measuring point of the circuit breaker. The X-ray beam penetrates the circuit breaker and finally strikes the imaging plate, transmitting the obtained digital signal to a PC terminal. The PC terminal displays an image of the internal mechanical components at the measuring point of the circuit breaker. The first moving device and the drone can be directly controlled via the PC terminal, which can also control the operation of the X-ray detector. During the entire detection process, no personnel need to approach the energized circuit breaker, and the high voltage of the circuit breaker will not damage the detection equipment. Therefore, this detection method can improve the accuracy of detecting the state of the internal mechanical components of the circuit breaker without power interruption. 2. Through the design of the angle adjustment component and the angle sensor, the angle sensor can not only collect the first angle information between the main optical axis of the X-ray source and the straight line of the measuring point, but also collect the second angle information between the main optical axis of the X-ray source and the vertical axis of the imaging plate. The orientation of the main optical axis of the X-ray source can be adjusted by the angle adjustment component to further ensure the accuracy of the detection. At the same time, this detection method can be applied to more scenarios. 3. Through the design of the lifting assembly and distance sensor, the distance sensor can not only collect the first distance information between the X-ray detector and the circuit breaker measuring point, but also obtain the third distance information between the imaging plate and the circuit breaker measuring point. By adjusting the first distance through the lifting assembly, a sufficient safe distance is maintained between the X-ray detector and the energized circuit breaker. It can be applied to the detection of circuit breakers with different voltages, and at the same time, it further ensures the accuracy of the detection. Attached Figure Description

[0030] Figure 1 This is a flowchart illustrating a detection method for independent circuit breakers operating under energized conditions of 500kV or higher, according to an embodiment of the present invention. Figure 2 This is a first structural schematic diagram of a detection device for independent circuit breakers under energized conditions of 500kV and above, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the second structure of a detection device for independent circuit breakers under energized conditions of 500kV and above, according to an embodiment of the present invention. Figure 4 This is an exploded view of the insulation protection component according to an embodiment of the present invention.

[0031] In the figure: 1-circuit breaker, 101-horizontal part, 102-vertical part, 2-X-ray detector, 3-X-ray beam, 4-main optical axis, 5-imaging plate, 6-moving vehicle, 7-lifting assembly, 8-angle adjusting assembly, 9-support frame, 10-ground, 11-drone. DETAILED DESCRIPTION

[0032] The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0033] The detection method for the independent circuit breaker in the charged state of 500kV or above in the embodiments of the present application, as shown in Figure 1 and Figure 2 The detection method for the independent circuit breaker in the charged state of 500kV or above includes: 101: moving the X-ray detector 2 to the first preset position at the bottom of the circuit breaker 1 by the first moving device, wherein the first preset position is directly below the circuit breaker 1, and the first preset position needs to keep the distance between the X-ray detector 2 and the circuit breaker 1 above the safe distance; moving the imaging plate 5 to the second preset position at the top of the circuit breaker 1 by the drone 11, wherein the second preset position is directly above the circuit breaker 1, the imaging plate 5 and the drone 11 are in a suspended state, have enough safe distance from the ground, and are in an equipotential state, can directly contact the charged circuit breaker, and the anti-interference strength of the 2.4GHz remote control signal is tested before the drone 11 takes off; 102: controlling the X-ray detector 2 to emit the X-ray beam 3 to the circuit breaker 1 through the PC terminal; 103: the X-ray beam 3 penetrating the circuit breaker 1 is shot on the imaging plate 5; 104: collecting the X-ray image information by the imaging plate 5 and converting it into a digital signal; 105: sending the digital signal to the PC terminal by the wireless transmission device to obtain the image of the internal mechanical components of the circuit breaker 1; controlling the first moving device and the drone 11 to move to another measuring point through the PC terminal to detect another measuring point.

[0034] It should be noted that the charged part of the circuit breaker 1 is the horizontal part 101 parallel to the ground 10, and the vertical part 102 of the circuit breaker 1 has voltage gradually decreasing from top to bottom, and the voltage decreases to 0 when reaching the support frame 9 at the bottom of the circuit breaker 1. In this application, the "circuit breaker 1" refers to the horizontal part 101 parallel to the ground 10.

[0035] Therefore, the X-ray detector 2 is moved to the first preset position by the first moving device, so that the X-ray detector and the charged circuit breaker maintain a sufficient safety distance; the imaging plate 5 is moved to the second preset position by the unmanned aerial vehicle 11 (the unmanned aerial vehicle 11 is in the air, and the same potential principle is the same as when birds stand on high-voltage lines, no current loop is formed, and the voltage difference on the unmanned aerial vehicle 11 is very small), so that the X-ray detector 2 and the charged circuit breaker 1 can be directly contacted, and the imaging plate 5 and the charged circuit breaker 1 maintain a safety distance, that is, the charged independent circuit breaker will not cause damage to the detection equipment; the axis degree between the X-ray detector 2 and the imaging plate 5 passes through the measuring point on the circuit breaker 1, the X-ray detector 2 emits an X-ray beam 3 to the measuring point of the circuit breaker 1, the X-ray beam 3 will penetrate the circuit breaker 1, and finally be shot on the imaging plate 5, forming an internal structure image of the circuit breaker 1. The image is sent to the PC terminal in the form of a digital signal through the wireless transmission device, and is displayed on the display of the PC terminal, and the image inside the circuit breaker 1 is directly presented, for example, there is a jam in the internal mechanical part of the circuit breaker 1, and the contact ablation. The first moving device and the unmanned aerial vehicle 11 can be controlled by artificial control, and the X-ray detector can be controlled by the PC terminal, so that the whole process is operated safely, and personnel do not need to approach the charged circuit breaker 1 in the whole detection process, and the high voltage of the circuit breaker 1 will not affect the detection equipment. Therefore, the detection method can improve the accuracy of detecting the state of the internal mechanical part of the circuit breaker 1 without power failure.

[0036] Preferably, the X-ray detector 2 is selected from COMET MXR-225 / 11, the maximum penetration capacity (penetrating A3 steel plate) is greater than 25 mm, the maximum photon energy is greater than or equal to 270kVp, the remote control capacity is greater than or equal to 80m, the imaging plate 5 is AGFA DX-D, the pixel spacing is less than 160um, the pixel number is greater than or equal to 2300*2800, and the resolution is greater than or equal to 3.6Lp / mm; and the unmanned aerial vehicle 11 is DJI Matrice 300 RTK model, and the load capacity is 5.5kg.

[0037] Preferably, the axis degree deviation between the X-ray source of the X-ray detector 2 and the imaging plate 5 is less than a first preset deviation 5°.

[0038] Specifically, in order to improve the imaging on the imaging plate 5 to be clearer and more accurate, the X-ray beam 3 needs to be irradiated at the measuring point and penetrated to the imaging plate 5, so that the axis degree deviation between the X-ray source of the X-ray detector 2 and the imaging plate 5 is controlled to be less than 5°, so as to avoid that the imaging is unclear due to too large deviation.

[0039] Preferably, referring to Figure 2 The X-ray detector 2 is moved to the first preset position at the bottom of the circuit breaker 1 through the first moving device, and specifically comprises: A moving track is arranged at the bottom of the circuit breaker 1; The mobile vehicle 6 is installed on the moving track so that the mobile vehicle 6 can move along the moving track; The X-ray detector 2 is installed on the mobile vehicle 6; The X-ray detector 2 is moved to the first preset position by the mobile vehicle 6.

[0040] Specifically, the mobile vehicle 6 is provided with a roller at the bottom, which needs to meet the requirement that the mobile vehicle 6 with the X-ray detector 2 can move to the directly below of all the measuring points of the circuit breaker 1; when the axis between the X-ray detector 2 and the imaging plate 5 passes the measuring point and is perpendicular to the straight line at the measuring point, the imaging effect is the best, therefore, the mobile vehicle 6 is designed to drive the X-ray detector 2 to move in the horizontal direction, so as to further improve the detection accuracy of all the measuring points.

[0041] Further, as shown in Figure 2 , 3 , a specific structure of the mobile vehicle 6 is provided, the X-ray detector 2 is installed on the mobile vehicle 6, specifically comprising: The angle adjusting assembly 8 is installed on the top of the mobile vehicle 6, and the X-ray detector 2 is installed on the angle adjusting assembly 8; The angle sensor is arranged on the mobile vehicle 6; The first angle information of the main optical axis 4 of the X-ray source and the straight line of the measuring point is collected by the angle sensor, wherein the straight line of the measuring point is a straight line (horizontal straight line) passing through the plurality of measuring points on the surface of the circuit breaker 1; The orientation of the main optical axis 4 of the X-ray source is adjusted by the angle adjusting assembly 8, so that the deviation of the first angle information from 90° is less than the second preset deviation.

[0042] Specifically, two setting scenarios of the circuit breaker 1 are provided in the present application, Figure 2 The horizontal ground 10 is used to represent that the mobile vehicle 6 can move to the directly below of the first preset position, Figure 3 The inclined ground 10 is used to represent that the mobile vehicle 6 cannot move to the directly below of the first preset position; when the mobile vehicle 6 cannot be located directly below the circuit breaker 1, the orientation of the main optical axis 4 of the X-ray source is upward, in order to ensure the accuracy of detection, therefore, the orientation of the main optical axis 4 of the X-ray source is adjusted by the angle adjusting assembly 8, and the first angle information is periodically detected by the angle sensor until the deviation of the first angle information from 90° is less than the second preset deviation, so as to ensure the accuracy of detection; at the same time, the detection method can be applied to more scenarios.

[0043] Further, the angle adjusting assembly 8 comprises an adjusting body and a damping rotating shaft, the adjusting body is rotatably arranged on the top surface of the moving vehicle 6 through the damping rotating shaft, the damping rotating shaft is controlled through the PC terminal, the top of the adjusting body is provided with a mounting groove, the bottom of the X-ray detector 2 is mounted in the mounting groove, and the locking structure is arranged between the X-ray detector 2 and the mounting groove, so as to realize the assembly and disassembly of the X-ray detector 2 and the mounting groove.

[0044] Preferably, the axial deviation between the X-ray source of the X-ray detector 2 and the imaging plate 5 is less than the first preset deviation, specifically comprising: collecting second angle information of the main optical axis 4 of the X-ray source and the vertical axis of the imaging plate 5 through the angle sensor; rotating the imaging plate 5 with its transverse axis as the center axis until the second angle information is less than the first preset deviation.

[0045] Specifically, according to the design of the above-mentioned angle sensor, when the angle sensor collects the first angle information of the main optical axis 4 of the X-ray source and the point straight line, the second angle information of the main optical axis 4 of the X-ray source and the vertical axis of the imaging plate 5 can be collected synchronously; if the second angle information is greater than the first preset deviation, it means that the deviation between the main optical axis 4 of the X-ray source and the vertical axis of the imaging plate 5 is too large, which will affect the detection effect, and the imaging plate 5 needs to be rotated with its transverse axis or longitudinal axis as the center axis until the second angle information is less than the first preset deviation, otherwise, subsequent imaging work can be carried out. Therefore, this design not only can reduce the number of sensors, but also can further ensure the accuracy of detection.

[0046] Preferably, referring to Figure 2 as shown, another specific structure of the moving vehicle 6 is provided, the X-ray detector 2 is installed on the moving vehicle 6, specifically comprising: the lifting assembly 7 is installed on the top of the moving vehicle 6, and the X-ray detector 2 is installed on the lifting assembly 7; the distance sensor is arranged on the moving vehicle 6; the first distance information between the X-ray detector 2 and the measuring point of the circuit breaker 1 is collected through the distance sensor; the height of the X-ray detector 2 is adjusted through the lifting assembly 7 until the X-ray detector 2 moves to the first preset position.

[0047] Specifically, the height of the X-ray detector 2 is adjusted through the lifting assembly 7, so that the X-ray detector 2 and the live circuit breaker 1 maintain a sufficient safety distance, avoiding forming a loop with the ground, which affects the X-ray detector 2, and the greater the voltage, the farther the interval, so that it can be applied to the detection of circuit breakers 1 of different voltages; and the first distance information between the X-ray detector 2 and the measuring point of the circuit breaker 1 is collected through the distance sensor, further ensuring that the distance is above the safety distance.

[0048] Further, the lifting assembly 7 comprises a cylinder and a lifting plate, the cylinder is arranged on the top surface of the moving vehicle 6, the telescopic end of the cylinder is fixedly connected with the lifting plate, the cylinder is controlled through the PC terminal, and the X-ray detector 2 is installed on the top surface of the lifting plate.

[0049] Preferably, the detection method further comprises: collecting second distance information between the X-ray detector 2 and the imaging plate 5 through the distance sensor; obtaining third distance information between the imaging plate 5 and the measuring point of the circuit breaker 1 through the first distance information and the second distance information; adjusting the height of the imaging plate 5 according to the third distance information until the imaging plate 5 moves to the second preset position.

[0050] Specifically, according to the design of the above-mentioned distance sensor, when the distance sensor collects the first distance information between the X-ray detector 2 and the measuring point of the circuit breaker 1, the second distance information between the X-ray detector 2 and the imaging plate 5 can be collected synchronously, and the third distance information between the imaging plate 5 and the measuring point of the circuit breaker 1 can be calculated through the difference between the first distance information and the second distance information; if the third distance information is less than the preset safe distance between the imaging plate 5 and the measuring point of the circuit breaker 1, the imaging plate 5 needs to be vertically moved upward by the unmanned aerial vehicle 11 until the third distance information is greater than the preset safe distance between the imaging plate 5 and the measuring point of the circuit breaker 1, otherwise, subsequent imaging work can be performed.

[0051] Preferably, the two specific designs on the moving vehicle 6 can be combined: The lifting assembly 7 is arranged on the top of the moving vehicle 6, the angle adjusting assembly 8 is arranged on the top of the lifting assembly 7, the X-ray detector 2 is arranged in the angle adjusting assembly 8, the angle adjusting assembly 8 can be lifted and moved by the lifting assembly 7, so that the X-ray detector 2 is lifted and moved, and the distance sensor and the angle sensor are arranged on the moving vehicle 6 to collect the first distance information, the second distance information, the first angle information and the second angle information.

[0052] Specifically, the angle adjusting assembly 8 comprises an adjusting body and a damping shaft, the lifting assembly 7 comprises a cylinder and a lifting plate, the cylinder is arranged on the top surface of the moving vehicle 6, the telescopic end of the cylinder is fixedly connected with the lifting plate, and the adjusting body is rotatably arranged on the top surface of the lifting plate through the damping shaft; an installation groove is formed in the top of the adjusting body, the bottom of the X-ray detector 2 is installed in the installation groove, and a locking structure is arranged between the X-ray detector 2 and the installation groove to realize assembly and disassembly of the X-ray detector 2 and the installation groove; the damping shaft and the cylinder are controlled through the PC terminal to adjust the height and direction of the X-ray detector 2.

[0053] Preferably, referring to Figure 4 As shown in the drawings, the imaging plate 5 is peripherally sleeved with an insulation protection assembly, which comprises an outer shell and a frame fixedly arranged on the inner wall of the outer shell. The frame is sleeved on the edge of the imaging plate 5, and both surfaces of the imaging plate 5 abut against the inner wall of the outer shell. The bottom of the outer shell is provided with a detection window so that the X-ray beam 3 can be shot onto the imaging plate 5.

[0054] Further, the material of the insulation protection assembly is selected from epoxy resin or polytetrafluoroethylene.

[0055] Specifically, in order to further ensure that the imaging plate 5 is not affected by the voltage on the circuit breaker 1, an insulation protection assembly is made of an insulation material such as epoxy resin or polytetrafluoroethylene outside the imaging plate 5. In order to avoid the shielding of the X-ray beam by the insulation protection assembly, which leads to unclear imaging, a detection window is arranged at the bottom of the outer shell so that the X-ray beam 3 can be shot onto the imaging plate 5.

[0056] Preferably, the top of the outer shell is provided with a connecting assembly for detachable connection with the unmanned aerial vehicle 11.

[0057] Specifically, the connecting assembly at the top of the outer shell is assembled with the lifting structure on the unmanned aerial vehicle 11. In order to maintain the stability of the imaging plate 5 during movement, multiple connection points of the connecting assembly and the unmanned aerial vehicle 11 can be provided to avoid shaking of the imaging plate 5 in the suspended state.

[0058] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A testing method for independent circuit breakers under energized conditions of 500kV and above, characterized in that, It includes the following steps: Multiple measuring points are preset on the circuit breaker (1); The X-ray detector (2) is moved to the first preset position at the bottom of the circuit breaker (1) by the first moving device; The imaging plate (5) is moved to the second preset position on top of the circuit breaker (1) by the drone (11); The X-ray detector (2) is controlled by the PC terminal to emit an X-ray beam (3) to the circuit breaker (1), and the X-ray beam (3) penetrates the circuit breaker (1) and is projected onto the imaging plate (5); X-ray image information is acquired through an imaging plate (5) and converted into digital signals; Digital signals are transmitted to a PC terminal via a transmission device to obtain images of the internal mechanical components of the circuit breaker (1); The first mobile device and the drone (11) are controlled by a PC terminal to perform detection at another measurement point.

2. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 1, characterized in that: The axial deviation between the X-ray source of the X-ray detector (2) and the imaging plate (5) is less than the first preset deviation.

3. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 2, characterized in that, Moving the X-ray detector (2) to a first preset position at the bottom of the circuit breaker (1) via the first moving device specifically includes: A moving track is installed in the area at the bottom of the circuit breaker (1); A mobile vehicle (6) is installed on a moving track so that the mobile vehicle (6) can move along the moving track; The X-ray detector (2) is mounted on the mobile vehicle (6); The X-ray detector (2) is moved to the first preset position by the moving vehicle (6).

4. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 3, characterized in that, The X-ray detector (2) is installed on the mobile vehicle (6), specifically including: An angle adjustment assembly (8) is installed on the top of the mobile vehicle (6), and the X-ray detector (2) is installed on the angle adjustment assembly (8); An angle sensor is installed on the mobile vehicle (6); The first angle information between the main optical axis (4) of the X-ray source and the measuring point line is collected by the angle sensor, wherein the measuring point line is a straight line passing through multiple measuring points on the surface of the circuit breaker (1). The orientation of the main optical axis (4) of the X-ray source is adjusted by the angle adjustment component (8) so that the deviation of the first angle information from 90° is less than the second preset deviation.

5. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 4, characterized in that, The axial deviation between the X-ray source of the X-ray detector (2) and the imaging plate (5) is less than the first preset deviation, specifically including: The second angle information between the main optical axis (4) of the X-ray source and the vertical axis of the imaging plate (5) is acquired by the angle sensor; Rotate the imaging plate (5) around its horizontal axis until the second angle information is less than the first preset deviation.

6. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 3, characterized in that, The X-ray detector (2) is installed on the mobile vehicle (6), specifically including: A lifting assembly (7) is installed on the top of the mobile vehicle (6), and an X-ray detector (2) is installed on the lifting assembly (7); A distance sensor is installed on the mobile vehicle (6); The distance sensor collects the first distance information between the X-ray detector (2) and the measuring point of the circuit breaker (1); The height of the X-ray detector (2) is adjusted by the lifting assembly (7) until the X-ray detector (2) moves to the first preset position.

7. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 6, characterized in that, The detection methods also include: The second distance information between the X-ray detector (2) and the imaging plate (5) is acquired by a distance sensor; The third distance information between the imaging plate (5) and the measuring point of the circuit breaker (1) is obtained by using the first distance information and the second distance information; Adjust the height of the imaging plate (5) according to the third distance information until the imaging plate (5) moves to the second preset position.

8. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 1, characterized in that: The imaging plate (5) is surrounded by an insulating protective assembly, which includes an outer shell and a frame. The frame is fixedly installed on the inner wall of the outer shell and is fitted on the side of the imaging plate (5). Both sides of the imaging plate (5) abut against the inner wall of the outer shell. A detection window is provided at the bottom of the outer shell so that the X-ray beam (3) can be directed onto the imaging plate (5).

9. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 8, characterized in that: The insulating and protective components are made of epoxy resin or polytetrafluoroethylene.

10. The detection method for independent circuit breakers under energized conditions above 500kV as described in claim 8, characterized in that: The top of the outer shell is provided with a connecting component for detachable connection with the drone (11).

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