Ultrasonic detection device for GIS (Gas Insulated Switchgear)

Abstract

The invention provides an ultrasonic detection device for a GIS. The ultrasonic detection device comprises a driving seat, a detection mechanism and an adsorption mechanism. In the ultrasonic detection device for the GIS provided by the invention, the driving seat is arranged to provide a moving carrier for the whole detection device, the detection device can move on the surface of a GIS tank body through two groups of driving wheels at the bottom, different positions of the tank body can be conveniently detected, a detector does not need to manually and frequently move a sensor, and the detection efficiency is improved. And errors caused by manual operation are reduced. And through the design of a pushing part, a smearing part and a detection part in the detection mechanism, the functions of automatic couplant smearing and automatic detection are achieved, and the problems that manual smearing is not uniform, and contact is not dense during handheld detection are solved. The adsorption mechanism is in contact with the side wall of the GIS tank body through a plurality of adsorption ports, and the driving seat is firmly adsorbed on the tank body in the detection process, so that the stability of the detection process is ensured, interference signals caused by shaking of the device are prevented, and the detection precision is improved.

Description

Technical Field

[0001] This invention belongs to the field of ultrasonic testing technology, and specifically relates to an ultrasonic testing device for GIS. Background Technology

[0002] The GIS tank is the core component of gas-insulated metal-enclosed switchgear (GIS), used to house electrical components such as circuit breakers, disconnectors, and current transformers, and to provide them with insulation and mechanical protection. When partial discharge occurs inside the GIS, it is accompanied by the generation of ultrasonic signals. By installing ultrasonic sensors on the outside of the GIS to receive the ultrasonic signals generated by the internal discharge, it is possible to indirectly determine whether there is a discharge inside the GIS.

[0003] In existing technologies, ultrasonic partial discharge testing is an important detection method for partial discharge diagnosis. During on-site testing, coupling agent is first applied to the sensor, and then the ultrasonic partial discharge sensor is tightly fixed to the GIS tank. Testing needs to be performed at multiple locations. However, prolonged hand-held operation of the sensor may cause hand tremors, resulting in poor contact between the sensor and the tank. This friction between the sensor and the tank generates interference signals. Furthermore, when testing on higher tanks, an extension support rod is required, increasing the number of tools carried by the testing personnel. This makes it difficult to directly determine the sensor's status and can also lead to poor contact between the sensor and the tank, allowing interference signals to enter the sensor, increasing the risk of misjudgment, reducing detection accuracy, and resulting in poor adaptability and practicality. Summary of the Invention

[0004] This invention provides an ultrasonic testing device for GIS, which aims to solve the problem of reduced testing accuracy caused by interference signals generated by manual operation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an ultrasonic testing device for GIS, comprising: The drive seat has a hollow receiving cavity, and the bottom end of the drive seat is provided with a working opening communicating with the receiving cavity. The bottom of the drive seat is provided with two sets of drive wheels. A detection mechanism is disposed within the receiving cavity. The detection mechanism has a pushing part that can extend radially along the GIS tank. The detection mechanism has a coating part and a detection part, both of which can be moved to a position corresponding to the pushing part. After the coating part or the detection part moves to a position corresponding to the pushing part, the pushing part pushes the coating part or the detection part to contact the GIS tank. An adsorption mechanism, disposed on the drive seat, has multiple adsorption ports that can contact the side wall of the GIS tank. The adsorption mechanism is used to adsorb the drive seat onto the side wall of the GIS tank during the detection process.

[0006] In one possible implementation, the drive housing includes: A connecting frame has a connecting cavity with an open bottom, and a connecting opening communicating with the connecting cavity is provided at the top of the connecting cavity; A connecting box is integrally connected to the connecting frame and is fastened to the connecting opening. The connecting box has a working cavity with an open bottom. A protective cover plate is provided over the opening of the connecting frame. The protective cover plate has the working opening. The connecting frame, the connecting box, and the protective cover plate together form the receiving cavity. A drive structure is provided on the connecting frame. Two drive structures are horizontally spaced on the connecting frame, and each drive structure is poweredly connected to two sets of drive wheels. The protective cover plate is provided with a through opening for each of the drive wheels to extend out; The connecting frame is provided with a wheel frame for rotating connection of each of the drive wheels.

[0007] In one possible implementation, the spacing direction between the two driving structures is defined as a first direction, and the direction that is perpendicular to the first direction and horizontally set is defined as a second direction. Each of the aforementioned drive structures includes: The adsorption wheel is provided in two, and the two adsorption wheels are arranged at intervals along the second direction. The rotation axis of each adsorption wheel is arranged along the first direction. The two adsorption wheels form a set of drive wheels. There are two driven shafts, each of which is rotatably mounted on the connecting frame. One end of each driven shaft is fixedly connected to the corresponding adsorption wheel and is coaxially mounted with the corresponding adsorption wheel. The other end of each driven shaft extends out along the first direction, and a driven bevel gear is provided on the other end of each driven shaft. A drive shaft is rotatably mounted on the connecting frame, with the rotation axis arranged along the second direction. Both ends of the drive shaft are provided with drive bevel gears, and the two drive bevel gears mesh with the two driven bevel gears. The drive shaft is provided with a driven gear coaxially sleeved on it. The driver has a power output end, on which a transmission gear is rotatably mounted. The rotation axis of the transmission gear is arranged along the second direction, and the transmission gear meshes with the driven gear. The connecting frame is provided with a shaft bracket for rotatably connecting each of the driven shafts and the driving shaft.

[0008] In one possible implementation, the adsorption wheel is an electromagnet-type adsorption moving wheel.

[0009] In one possible implementation, the spacing direction between the two driving structures is defined as a first direction, and the direction that is perpendicular to the first direction and horizontally set is defined as a second direction. The testing institutions include: Two arc-shaped tracks are provided, and the two arc-shaped tracks are spaced apart along the second direction, with each arc-shaped track disposed within the receiving cavity; An arc-shaped sliding plate is slidably mounted on two arc-shaped tracks; A drive component, which is poweredly connected to the curved skateboard, is used to drive the curved skateboard to slide. A telescopic structure is provided inside the connecting box. The fixed end of the telescopic structure is fixed to the connecting box, and the telescopic end of the telescopic structure extends radially toward the arc-shaped sliding plate along the GIS tank body. The telescopic end of the telescopic structure is the pushing part. A detection structure is fixed on the arc-shaped sliding plate. The detection structure has a coating part and a detection part. Both the coating part and the detection part can extend radially toward the GIS tank along the arc-shaped sliding plate. When the coating part or the detection part is coaxially arranged with the push part, the push part drives the coating part or the detection part to extend toward the GIS tank.

[0010] In one possible implementation, the drive assembly includes two drive gears, which are spaced apart along the first direction. Each drive gear is rotatably connected to the connecting box, and the rotation axis is arranged along the second direction. Each drive gear is poweredly connected to the arc-shaped sliding plate. The arc-shaped sliding plate is provided with connecting teeth that mesh with each of the drive gears; Each of the aforementioned drive gears is connected to the motor for power.

[0011] In one possible implementation, the detection structure includes: Multiple fixing seats are provided, and each fixing seat is arranged in a ring at intervals on the arc-shaped sliding plate; Multiple reset telescopic rods are provided, each reset telescopic rod is correspondingly provided with each fixed base, and each reset telescopic rod has a reset telescopic end that can extend radially toward the GIS tank along the arc-shaped sliding plate; An application unit is detachably connected to one of the reset telescopic ends, and the application unit is the application part; An ultrasonic sensor is detachably connected to one of the reset telescopic ends, and the ultrasonic sensor is the detection unit; A rotating brush head is detachably connected to one of the reset telescopic ends. The rotating brush head is rotatably connected to the corresponding reset telescopic end. The rotating brush head is used to clean the surface of the GIS tank to be inspected before applying the coupling agent. The rotating brush head is electrically connected to the power supply unit.

[0012] In one possible implementation, each of the reset telescopic rods includes: The outer sleeve has one end fixed on the corresponding fixed seat, and the other end extends radially toward the GIS tank along the arc-shaped sliding plate. Each outer sleeve has a cavity for receiving the cylinder. A push rod is coaxially and slidably disposed within the receiving cavity. One end of the push rod is provided with a push plate, and the other end of the push rod extends outward. A return spring is disposed inside the receiving cavity and sleeved on the push rod. The return spring is used to ensure that the push rod always tends to move away from the GIS tank.

[0013] In one possible implementation, the application unit includes: The hopper is detachably connected to the corresponding reset telescopic end and has a hopper for holding the coupling agent. A coating head is disposed on the hopper and communicates with the material holding cavity. The coating head extends radially toward the GIS tank along the arc-shaped sliding plate, and a liquid outlet is provided on the extended end of the coating head. A negative pressure ball bearing is disposed on the extended end of the applicator head and located inside the liquid outlet hole. The negative pressure ball bearing is used to allow the coupling agent in the hopper to flow out through the liquid outlet hole when in contact with the side wall of the GIS tank, and to seal the liquid outlet hole when away from the side wall of the GIS tank.

[0014] In one possible implementation, the adsorption mechanism includes: The adsorption seat is provided in two, and the two adsorption seats are horizontally spaced on both sides of the drive seat. Each adsorption seat has an adsorption cavity with an open bottom end, and the open end of the adsorption cavity is the adsorption port. A negative pressure fan is installed inside the receiving cavity and connected to each of the adsorption seats; The drive seat has an air inlet at its top.

[0015] In this implementation, compared to existing technologies, the drive base provides a mobile carrier for the entire detection device. Two sets of drive wheels at the bottom allow the device to move across the surface of the GIS tank, facilitating detection at different locations within the tank. This eliminates the need for frequent manual sensor movement by operators, reducing errors caused by human intervention. The design of the pushing, coating, and detection sections within the detection mechanism enables automatic application of the coupling agent and automatic detection, avoiding uneven coating and poor contact issues during handheld detection. The adsorption mechanism contacts the side wall of the GIS tank through multiple adsorption ports, ensuring the drive base is firmly attached to the tank during detection. This guarantees the stability of the detection process, prevents interference signals caused by device shaking, improves detection accuracy, and offers good adaptability and practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an ultrasonic testing device for GIS provided in an embodiment of the present invention; Figure 2 A schematic diagram of the internal structure of an ultrasonic testing device for GIS provided in an embodiment of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the drive structure of the ultrasonic detection device for GIS provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the protective cover plate for the ultrasonic testing device for GIS provided in an embodiment of the present invention; Figure 6 This is a side view structural diagram of an ultrasonic testing device for GIS provided in an embodiment of the present invention. Explanation of reference numerals in the attached figures: 10. Drive base; 11. Connecting frame; 12. Connecting box; 13. Protective cover; 14. Drive structure; 141. Adsorption wheel; 142. Driven shaft; 1421. Driven bevel gear; 143. Drive shaft; 1431. Drive bevel gear; 1432. Driven gear; 1441. Transmission gear; 144. Driver; 20. Detection mechanism; 21. Arc-shaped track; 22. Arc-shaped slide plate; 23. Drive assembly; 231 251. Drive gear; 252. Telescopic structure; 253. Detection structure; 254. Fixed base; 255. Reset telescopic rod; 256. Outer sleeve; 257. Push rod; 258. Reset spring; 259. Application unit; 250. Material hopper; 251. Application head; 252. Negative pressure ball bearing; 250. Ultrasonic sensor; 251. Rotating brush head; 252. Adsorption mechanism; 253. Adsorption seat; 254. Negative pressure fan. Detailed Implementation

[0017] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0018] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0019] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0021] Please refer to the following: Figures 1 to 6The ultrasonic testing device for GIS provided by the present invention will now be described. The ultrasonic testing device for GIS includes a drive base 10, a testing mechanism 20, and an adsorption mechanism 30. The drive base 10 has a hollow receiving cavity, and a working opening communicating with the receiving cavity is provided at the bottom end of the drive base 10. Two sets of drive wheels are provided at the bottom of the drive base 10. The testing mechanism 20 is disposed within the receiving cavity and has a pushing part that can extend radially along the GIS tank. The testing mechanism 20 has a coating part and a testing part, both of which can be moved to positions corresponding to the pushing part. After the coating part or testing part moves to a position corresponding to the pushing part, the pushing part pushes the coating part or testing part into contact with the GIS tank. The adsorption mechanism 30 is disposed on the drive base 10 and has multiple adsorption ports that can contact the side wall of the GIS tank. The adsorption mechanism 30 is used to adsorb the drive base 10 onto the side wall of the GIS tank during the testing process.

[0022] The ultrasonic testing device for GIS provided in this embodiment, compared with the prior art, features a drive base 10 that provides a moving carrier for the entire testing device. Two sets of drive wheels at the bottom allow the testing device to move on the surface of the GIS tank, facilitating testing at different locations on the tank. This eliminates the need for frequent manual sensor movement by the testing personnel, reducing errors caused by human operation. The design of the pushing, coating, and testing sections in the testing mechanism 20 enables automatic application of coupling agent and automatic testing, avoiding problems such as uneven coating by manual application and poor contact during handheld testing. The adsorption mechanism 30 contacts the side wall of the GIS tank through multiple adsorption ports, ensuring the drive base 10 is firmly adsorbed onto the tank during testing. This guarantees the stability of the testing process, prevents interference signals caused by device shaking, improves testing accuracy, and offers good adaptability and practicality.

[0023] The drive wheel of the drive base 10 can be replaced with a tracked drive structure 14. The tracked drive structure 14 has a larger contact area with the surface of the GIS tank, providing better passability and stability on tanks with uneven surfaces. The push part of the detection mechanism 20 can be replaced with a hydraulic push rod instead of the telescopic structure 24.

[0024] In some embodiments, the drive housing 10 may be adopted as follows: Figure 1 , Figure 2 , Figure 4 , Figure 6 The structure shown. See also Figure 1 , Figure 2 , Figure 4 , Figure 6The drive unit 10 includes a connecting frame 11, a connecting box 12, a protective cover plate 13, and a drive structure 14. The connecting frame 11 has a connecting cavity with an open bottom and a connecting opening communicating with the connecting cavity at its top. The connecting box 12 is integrally connected to the connecting frame 11 and is fastened to the connecting opening. The connecting box 12 has a working cavity with an open bottom. The protective cover plate 13 covers the open end of the connecting frame 11 and has a working opening. The connecting frame 11, connecting box 12, and protective cover plate 13 together form a receiving cavity. Two drive structures 14 are mounted on the connecting frame 11, horizontally spaced apart. Each drive structure 14 is poweredly connected to two sets of drive wheels.

[0025] The protective cover plate 13 is provided with through openings for each drive wheel to extend out.

[0026] The connecting frame 11 is equipped with a wheel frame for rotating and connecting each drive wheel.

[0027] The connecting frame 11, connecting box 12, and protective cover 13 together form a receiving cavity, providing installation space for the detection mechanism 20 and other components, and protecting the internal components from dust, debris, etc., which could affect the normal operation of the device. Two drive structures 14 are respectively powered by two sets of drive wheels, making the movement of the drive base 10 more stable and reliable, adaptable to GIS tanks of different shapes and surface conditions. Meanwhile, the through-hole on the protective cover 13 and the wheel frame design on the connecting frame 11 rationally arrange the installation positions of the drive wheels, ensuring normal rotation of the drive wheels and smooth movement of the device, thus improving the stability and durability of the detection device.

[0028] The two drive structures 14 are respectively connected to the two sets of drive wheels, controlling the two sets of drive wheels to rotate in opposite directions, which can be used in the ultrasonic detection device of GIS to achieve turning around on the spot.

[0029] The connecting frame 11, connecting box 12, and protective cover 13 can be made of different engineering plastics. Engineering plastics have advantages such as light weight and corrosion resistance, which can reduce the overall weight of the device and improve its service life. The power connection method of the drive structure 14 can use belt drive instead of gear drive. In some embodiments, the driving structure 14 described above may adopt the following... Figure 2 , Figure 4 The structure shown. See also Figure 2 , Figure 4 The direction of the interval between the two drive structures 14 is set as the first direction, and the direction that is perpendicular to the first direction and set horizontally is set as the second direction.

[0030] Each drive structure 14 includes an adsorption wheel 141, a driven shaft 142, a drive shaft 143, and a driver 144. Two adsorption wheels 141 are provided, spaced apart along a second direction. The rotation axes of each adsorption wheel 141 are arranged along a first direction, and the two adsorption wheels 141 form a set of drive wheels. Two driven shafts 142 are provided, each rotatably mounted on a connecting frame 11. One end of each driven shaft 142 is fixedly connected to and coaxially mounted with the corresponding adsorption wheel 141. The other end of each driven shaft 142 extends along the first direction and is equipped with a driven bevel gear 1421. The drive shaft 143 is rotatably mounted on the connecting frame 11, with its rotation axis arranged along a second direction. Both ends of the drive shaft 143 are equipped with drive bevel gears 1431, which mesh with the two driven bevel gears 1421. A coaxially sleeved driven gear 1432 is also provided on the drive shaft 143. The driver 144 has a power output end, on which a transmission gear 1441 is rotatably mounted. The rotation axis of the transmission gear 1441 is set along the second direction, and the transmission gear 1441 meshes with the driven gear 1432.

[0031] The connecting frame 11 is provided with a shaft bracket for rotatably connecting each driven shaft 142 and drive shaft 143.

[0032] Through the cooperation of components such as the adsorption wheel 141, driven shaft 142, drive shaft 143, and driver 144, the power transmission and rotation of the drive wheel are realized. This design makes the transmission of the drive structure 14 more precise, and can accurately control the rotation of the drive wheel according to the detection requirements, thereby realizing the precise movement of the detection device on the surface of the GIS tank. For example, when detecting complex parts of the tank, the speed and direction of the driver 144 can be controlled to make the detection device accurately reach the detection position, improving the accuracy and efficiency of the detection. Moreover, the meshing transmission method of bevel gears and gears has the advantages of compact structure and stable transmission ratio, which can ensure the reliability of the drive structure 14 during long-term operation.

[0033] The adsorption wheel 141 can be replaced with a vacuum adsorption wheel 141. The vacuum adsorption wheel 141 generates adsorption force by drawing a vacuum, resulting in stable adsorption and suitability for GIS tank surfaces made of various materials. The drive shaft 142 and drive shaft 143 can be driven by chain drive instead of bevel gear drive. Chain drive has advantages such as high transmission efficiency and convenient maintenance, which can reduce the maintenance cost of the device.

[0034] In some embodiments, the adsorption wheel 141 may be employed as follows: Figure 1 , Figure 2 , Figure 4 , Figure 6 The structure shown. See also Figure 1 , Figure 2 , Figure 4 , Figure 6 The adsorption wheel 141 is an electromagnet adsorption type moving wheel.

[0035] Electromagnetic adsorption-type moving wheels allow for convenient adjustment of the adsorption force by controlling the on / off state and magnitude of the current. When the device needs to be moved, the adsorption force can be reduced to allow the drive wheels to rotate smoothly. During testing, the adsorption force is increased to firmly attach the device to the GIS tank. This adjustable adsorption method not only adapts to GIS tanks of different materials and surface conditions but also reduces resistance to movement while ensuring device stability, thus improving the device's flexibility and applicability.

[0036] Electromagnetic adsorption type moving wheels can be replaced with vacuum suction cup type moving wheels, which generate adsorption force through vacuum, and the magnitude of the adsorption force can be adjusted by controlling the vacuum level.

[0037] In some embodiments, the testing institution 20 may employ, for example... Figure 2 The structure shown. See also Figure 2 The direction of the interval between the two drive structures 14 is set as the first direction, and the direction that is perpendicular to the first direction and set horizontally is set as the second direction.

[0038] The detection mechanism 20 includes an arc-shaped track 21, an arc-shaped slide plate 22, a drive assembly 23, a telescopic structure 24, and a detection structure 25. Two arc-shaped tracks 21 are provided, spaced apart along a second direction, each track 21 being disposed within a receiving cavity. The arc-shaped slide plate 22 is slidably mounted on the two arc-shaped tracks 21. The drive assembly 23 is power-connected to the arc-shaped slide plate 22 and is used to drive the slide plate 22 to slide. The telescopic structure 24 is disposed within a connecting box 12, with its fixed end fixed to the connecting box 12 and its telescopic end extending radially toward the arc-shaped slide plate 22 along the GIS tank body. The telescopic end of the telescopic structure 24 serves as a pushing part. The detection structure 25 is fixed to the arc-shaped slide plate 22 and has an application part and a detection part. Both the application part and the detection part can extend radially toward the GIS tank body along the arc-shaped slide plate 22. When the application part or the detection part is coaxially arranged with the pushing part, the pushing part drives the application part or the detection part to extend toward the GIS tank body.

[0039] The drive assembly 23 is poweredly connected to the arc-shaped slide plate 22, which can precisely control the sliding position and speed of the arc-shaped slide plate 22, thereby accurately moving the coating section and the detection section to the position to be detected. The telescopic structure 24 acts as a pusher, which can accurately push the coating section or the detection section onto the surface of the GIS tank, ensuring close contact between the coating agent and the detection process, avoiding the problem of loose contact caused by human operation, and improving the detection accuracy.

[0040] In some embodiments, the driving component 23 described above may employ, for example... Figure 2 The structure shown. See also Figure 2 The drive assembly 23 includes two drive gears 231, which are spaced apart along a first direction. Each drive gear 231 is rotatably connected to the connecting box 12, and the rotation axis is set along a second direction. Each drive gear 231 is poweredly connected to the arc-shaped slide plate 22.

[0041] The arc-shaped slide plate 22 is provided with connecting teeth that mesh with each drive gear 231.

[0042] Each drive gear 231 is connected to the motor for power.

[0043] Two drive gears 231 mesh with connecting teeth on the arc-shaped slide plate 22. The drive gears 231 are driven to rotate by a motor, thereby causing the arc-shaped slide plate 22 to slide. This transmission method has advantages such as high transmission efficiency and smooth movement. It can precisely control the sliding distance and speed of the arc-shaped slide plate 22, ensuring that the coating and detection sections accurately reach their predetermined positions. Simultaneously, the motor is easy to control, allowing for flexible adjustment of the arc-shaped slide plate 22's movement state according to detection requirements, thus improving the automation level and detection efficiency of the detection device.

[0044] The drive gear 231 and connecting gear of the drive assembly 23 can be replaced with synchronous belt drive, which can improve the accuracy and stability of the movement of the curved skateboard 22. The motor can be replaced with a stepper motor, which can achieve precise position and angle control, making the movement of the curved skateboard 22 more accurate.

[0045] In some embodiments, the detection structure 25 described above can be employed as follows: Figure 2 , Figure 3 The structure shown. See also Figure 2 , Figure 3 The detection structure 25 includes a fixed base 251, a reset telescopic rod 252, an application unit 253, an ultrasonic sensor 254, and a rotating brush head 255. Multiple fixed bases 251 are provided, each circumferentially spaced on an arc-shaped sliding plate 22. Multiple reset telescopic rods 252 are provided, each corresponding to a fixed base 251, and each reset telescopic rod 252 has a reset telescopic end that extends radially towards the GIS tank along the arc-shaped sliding plate 22. The application unit 253 is detachably connected to one of the reset telescopic ends; the application unit 253 is the application section. The ultrasonic sensor 254 is detachably connected to one of the reset telescopic ends; the ultrasonic sensor 254 is the detection section. The rotating brush head 255 is detachably connected to one of the reset telescopic ends, and is rotatably connected to the corresponding reset telescopic end. The rotating brush head 255 is used to clean the surface of the GIS tank to be tested before applying the coupling agent.

[0046] The rotating brush head 255 is electrically connected to the power supply unit.

[0047] Multiple mounting bases 251 are arranged in a ring at intervals on the arc-shaped sliding plate 22, providing a mounting base for the reset telescopic rod 252, the application unit 253, the ultrasonic sensor 254, and the rotating brush head 255. The reset telescopic rod 252 allows the application unit 253, the ultrasonic sensor 254, and the rotating brush head 255 to automatically reset when not in use, avoiding wear caused by prolonged contact with the GIS tank surface. During use, it extends accurately to contact the tank via a pushing mechanism. The rotating brush head 255 cleans the surface of the GIS tank to be tested before applying the coupling agent, removing dust and impurities, ensuring effective application of the coupling agent and accurate detection. The application unit 253 and the ultrasonic sensor 254 are detachably connected to the reset telescopic end, facilitating replacement and maintenance according to different testing needs, thus improving the versatility and practicality of the device.

[0048] The number and layout of the mounting bases 251 can be adjusted according to actual testing needs. The rotating brush head 255 can be replaced with a brush or other cleaning tools, such as a jet cleaning device, which cleans the surface of the can by spraying high-pressure gas. The connection between the coating unit 253 and the ultrasonic sensor 254 can be replaced by a snap-fit ​​connection instead of a detachable connection. The snap-fit ​​connection is more convenient and quick, and can improve replacement efficiency.

[0049] In some embodiments, the aforementioned reset telescopic rod 252 may be adopted as follows: Figure 2 , Figure 3 The structure shown. See also Figure 2 , Figure 3 Each reset telescopic rod 252 includes an outer sleeve 2521, a push rod 2522, and a reset spring 2523. One end of the outer sleeve 2521 is fixed to the corresponding fixed base 251, and the other end extends radially toward the GIS tank along the arc-shaped sliding plate 22. Each outer sleeve 2521 has a receiving cavity. The push rod 2522 is coaxially slidably disposed within the receiving cavity. One end of the push rod 2522 is provided with a push plate, and the other end of the push rod 2522 extends outward. The reset spring 2523 is disposed within the receiving cavity and sleeved on the push rod 2522. The reset spring 2523 is used to ensure that the push rod 2522 always tends to move away from the GIS tank.

[0050] The cooperation of the outer sleeve 2521, the push rod 2522, and the return spring 2523 enables the extension and retraction of the return telescopic rod 252 and its reset function. The return spring 2523 ensures that the push rod 2522 always tends to move away from the GIS tank. When not in use, the push rod 2522 automatically retracts, protecting the coating unit 253, the ultrasonic sensor 254, and the rotating brush head 255. When the pushing unit pushes the push rod 2522, it extends against the elastic force of the return spring 2523, ensuring close contact between the coating unit 253, the ultrasonic sensor 254, or the rotating brush head 255 and the surface of the GIS tank, guaranteeing the stability and accuracy of the detection process. The structure is simple and reliable, enabling stable operation for extended periods and reducing the probability of device malfunctions.

[0051] In some embodiments, the application unit 253 may employ, for example... Figure 3 The structure shown. See also Figure 3 The application unit 253 includes a hopper 2531, an application head 2532, and a negative pressure ball bearing 2533. The hopper 2531 is detachably connected to a corresponding resetting telescopic end and has a storage cavity for the coupling agent. The application head 2532 is mounted on the hopper 2531 and communicates with the storage cavity. The application head 2532 extends radially towards the GIS tank along the arc-shaped sliding plate 22, and has a liquid outlet at its extended end. The negative pressure ball bearing 2533 is mounted on the extended end of the application head 2532 and located within the liquid outlet. The negative pressure ball bearing 2533 allows the coupling agent in the hopper 2531 to flow out through the liquid outlet when in contact with the side wall of the GIS tank, and seals the liquid outlet when away from the side wall of the GIS tank.

[0052] The hopper 2531 holds the coupling agent, and the application head 2532 is connected to the hopper cavity. The flow of the coupling agent is controlled by a negative pressure ball bearing 2533. When the negative pressure ball bearing 2533 contacts the side wall of the GIS tank, the coupling agent in the hopper 2531 flows out through the outlet hole, achieving automatic coupling agent application. When away from the tank side wall, the negative pressure of the coupling agent seals the outlet hole, preventing leakage and ensuring the efficiency and accuracy of coupling agent application. This improves the reliability of the detection process.

[0053] The negative pressure ball 2533 of the application unit 253 can be replaced with a liquid outlet controlled by a micro solenoid valve. The flow of the coupling agent can be precisely controlled by the solenoid valve, which can achieve more accurate dosage control.

[0054] In some embodiments, the adsorption mechanism 30 described above may employ, for example... Figure 2 , Figure 6 The structure shown. See also Figure 2 , Figure 6The adsorption mechanism 30 includes an adsorption seat 31 and a negative pressure fan 32. Two adsorption seats 31 are provided, horizontally spaced on both sides of the drive seat 10. Each adsorption seat 31 has an adsorption cavity with an open bottom, the opening of which serves as the adsorption port. The negative pressure fan 32 is disposed within the receiving cavity and is connected to each adsorption seat 31.

[0055] The drive seat 10 has an air inlet at its top.

[0056] The cooperation of the two adsorption seats 31 and the negative pressure fan 32 creates negative pressure on both sides of the drive seat 10, firmly adhering the drive seat 10 to the side wall of the GIS tank. The air inlet at the top of the drive seat 10 ensures airflow and maintains the normal operation of the negative pressure fan 32. This adsorption method provides sufficient adsorption force, ensuring that the detection device can be stably adsorbed on the tank under various operating conditions. Even when detecting tanks that are high or have uneven surfaces, it effectively prevents the device from shaking or falling, improving the safety and stability of the detection device.

[0057] The negative pressure fan 32 of the adsorption mechanism 30 can be replaced by a vacuum pump. The vacuum pump can provide greater negative pressure, enhance adsorption force, and is suitable for high-altitude testing. The shape of the adsorption seat 31 can be customized according to the surface shape of the tank. For example, using an arc-shaped adsorption seat 31 can better fit the surface of the tank and improve the adsorption effect.

[0058] The ultrasonic testing device for GIS provided in this embodiment operates as follows: First, the device is placed at a suitable position on the surface of the GIS tank. Then, the adsorption mechanism 30 is activated, and the negative pressure fan 32 operates, creating negative pressure on both sides of the drive seat 10 through the adsorption port of the adsorption seat 31, so that the drive seat 10 is firmly adsorbed onto the side wall of the GIS tank. Next, the driver 144 of the drive structure 14 is started. The power output end of the driver 144 drives the transmission gear 1441 to rotate. The transmission gear 1441 meshes with the driven gear 1432, driving the drive shaft 143 to rotate. The drive bevel gears 1431 at both ends of the drive shaft 143 drive the driven bevel gear 1421 on the driven shaft 142 to rotate, thereby causing the adsorption wheel 141 to rotate. The drive seat 10 moves on the surface of the tank to the detection start position. Upon reaching the detection position, the motor of the drive assembly 23 starts, driving the drive gear 231 to rotate. The drive gear 231 meshes with the connecting teeth on the arc-shaped slide plate 22, causing the arc-shaped slide plate 22 to slide on the arc-shaped track 21, moving the rotating brush head 255 to the corresponding position on the surface of the GIS tank to be inspected. The power supply unit supplies power to the rotating brush head 255, which rotates to clean the surface of the tank. After cleaning, the curved sliding plate 22 continues to slide, moving the application unit 253 to a position coaxial with the pushing part. The telescopic end of the telescopic structure 24 extends, pushing the push rod 2522 of the application unit 253 to overcome the elastic force of the return spring 2523, causing the application head 2532 to contact the surface of the GIS tank. At this time, the negative pressure ball bearing 2533 generates negative pressure in contact with the tank, and the coupling agent in the hopper 2531 flows out through the liquid outlet, evenly applying it to the surface of the tank. After the coating is completed, the telescopic structure 24 retracts, and the coating unit 253 resets under the action of the return spring 2523. The arc-shaped sliding plate 22 slides again, moving the ultrasonic sensor 254 to a position coaxial with the pushing part. The telescopic structure 24 extends again, pushing the ultrasonic sensor 254 into close contact with the surface of the tank, and begins ultrasonic detection to receive ultrasonic signals generated by partial discharge inside the GIS. After completing one test, the telescopic structure 24 retracts, and the ultrasonic sensor 254 resets. The drive base 10 continues to move to the next test position via the drive structure 14, repeating the above-mentioned cleaning, coupling agent application, and testing procedures until all predetermined positions on the GIS tank are tested. After the test is completed, the negative pressure fan 32 is turned off, the adsorption force of the adsorption mechanism 30 is released, and the device is removed from the tank.

[0059] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ultrasonic detection device for a GIS, characterized in that, The utility model relates to a GIS detection device, including: Drive seat with hollow accommodating cavity, the drive seat bottom is equipped with two groups of drive wheels with the working opening of accommodating cavity intercommunication, Detection mechanism is arranged in the accommodating cavity, the detection mechanism has the push part that can stretch out along the radial of GIS tank body, the detection mechanism has the smearing part and the detection part, the smearing part and the detection part can be moved to the position corresponding with the push part, after the smearing part or the detection part moves to the position corresponding with the push part, the push part pushes the smearing part or the detection part and GIS tank body contact, Suction mechanism is arranged on the drive seat and has a plurality of suction ports that can contact the side wall of GIS tank body, the suction mechanism is used for adsorbing the drive seat on the side wall of GIS tank body during detection.

2. The ultrasonic detection apparatus for a GIS according to claim 1, wherein The drive seat includes: Connecting frame with open bottom connection cavity, the connection cavity top is equipped with the connection opening with the connection cavity intercommunication, Connecting box is integrally connected with the connecting frame and is buckled at the connection opening, the connecting box has open bottom working cavity, Protective cover plate is covered in the opening of the connecting frame, the protective cover plate is equipped with the working opening, the connecting frame, the connecting box and the protective cover plate are enclosed into the accommodating cavity, Drive structure is arranged on the connecting frame and is provided with two, two drive structures are horizontally spaced apart on the connecting frame, two drive structures are respectively connected with two groups of drive wheels, Wherein, the protective cover plate is provided with a through hole for each drive wheel to extend out; Wherein, the connecting frame is provided with a wheel frame for the rotational connection of each drive wheel.

3. The ultrasonic detection apparatus for GIS according to claim 2, wherein The interval direction of two drive structures is the first direction, and the direction perpendicular to the first direction and horizontally arranged is the second direction; Each drive structure includes: Suction wheel, provided with two, two suction wheels are spaced apart along the second direction, the rotation axis of each suction wheel is arranged along the first direction, and two suction wheels are a group of drive wheels, From the driving shaft, provided with two, each from the driving shaft is rotatably arranged on the connecting frame, one end of each from the driving shaft is fixedly connected with the corresponding suction wheel and is coaxially arranged with the corresponding suction wheel, the other end of each from the driving shaft extends along the first direction, and a driven bevel gear is arranged on the other end of each from the driving shaft, Drive shaft, rotatably arranged on the connecting frame, the rotation axis is arranged along the second direction, both ends of the drive shaft are provided with drive bevel gears, two drive bevel gears are meshed with two driven bevel gears, and a driven gear coaxially sleeved with the drive shaft is arranged on the drive shaft, Driver, having a power output end, a transmission gear is rotatably arranged on the power output end, the rotation axis of the transmission gear is arranged along the second direction, and the transmission gear is meshed with the driven gear, Wherein, the connecting frame is provided with a shaft frame for the rotational connection of each from the driving shaft and the drive shaft.

4. The ultrasonic detection apparatus for a GIS according to claim 3, wherein The suction wheel is an electromagnet suction type moving wheel.

5. The ultrasonic detection apparatus for a GIS according to claim 2, wherein The interval direction of the two driving structures is a first direction, and the direction perpendicular to the first direction and horizontally arranged is a second direction; The detection mechanism comprises: Two arc-shaped tracks are arranged at intervals along the second direction, and each arc-shaped track is arranged in the accommodating cavity; An arc-shaped sliding plate is slidingly arranged on the two arc-shaped tracks; A driving assembly is in power connection with the arc-shaped sliding plate and is used for driving the arc-shaped sliding plate to slide; A telescopic structure is arranged in the connecting box, a fixed end of the telescopic structure is fixedly arranged on the connecting box, a telescopic end of the telescopic structure extends radially towards the arc-shaped sliding plate, and the telescopic end of the telescopic structure is the pushing part; A detection structure is fixedly arranged on the arc-shaped sliding plate, the detection structure has the smearing part and the detection part, and the smearing part and the detection part can extend radially towards the GIS tank.

6. The ultrasonic detection apparatus for GIS according to claim 5, wherein The driving assembly comprises two driving gears arranged at intervals along the first direction, each driving gear is rotationally connected in the connecting box, and the rotation axis is arranged along the second direction, and each driving gear is in power connection with the arc-shaped sliding plate; The arc-shaped sliding plate is provided with a connecting tooth in meshing connection with each driving gear. Each driving gear is in power connection with a motor.

7. The ultrasonic detection apparatus for GIS according to claim 5, wherein The detection structure comprises: A plurality of fixed seats are arranged at intervals in a ring shape on the arc-shaped sliding plate; A plurality of reset telescopic rods are arranged in correspondence with the fixed seats, and each reset telescopic rod has a reset telescopic end which can extend radially towards the GIS tank; A smearing unit is detachably connected to one of the reset telescopic rods, and the smearing unit is the smearing part; An ultrasonic sensor is detachably connected to one of the reset telescopic rods, and the ultrasonic sensor is the detection part; A rotary brush head is detachably connected to one of the reset telescopic rods, and the rotary brush head is in rotational connection with the corresponding reset telescopic rod, and the rotary brush head is used for cleaning the surface to be detected of the GIS tank before smearing the coupling agent. The rotary brush head is in electrical connection with a power supply unit.

8. The ultrasonic detection apparatus for GIS according to claim 7, wherein Each reset telescopic rod comprises: An outer sleeve is fixedly arranged at one end on the corresponding fixed seat and extends radially towards the GIS tank at the other end, and each outer sleeve has an accommodating cylinder cavity; A push rod is coaxially slidingly arranged in the accommodating cylinder cavity, one end of the push rod is provided with a push plate, and the other end of the push rod extends outward; A reset spring is arranged in the accommodating cylinder cavity and is sleeved on the push rod, and the reset spring is used for making the push rod always have a tendency to move away from the GIS tank.

9. The ultrasonic detection apparatus for GIS according to claim 7, wherein The smearing unit comprises: A hopper is detachably connected to the corresponding reset telescopic rod and has a material containing cavity for containing the coupling agent. The coating head is arranged on the material bin and communicates with the material containing cavity. The coating head extends towards the GIS tank body along the radial direction of the arc-shaped sliding plate. An outlet hole is arranged on the extending end of the coating head. The negative pressure ball is arranged on the extending end of the coating head and located in the outlet hole. When the negative pressure ball contacts with the side wall of the GIS tank body, the coupling agent in the material bin flows out through the outlet hole. When the negative pressure ball is away from the side wall of the GIS tank body, the outlet hole is sealed.

10. The ultrasonic detection apparatus for GIS according to claim 1, wherein The adsorption mechanism comprises: Two adsorption seats are horizontally and spacedly arranged on both sides of the driving seat. Each adsorption seat has an adsorption cavity with an open bottom end. The open end of the adsorption cavity is the adsorption port. A negative pressure fan is arranged in the containing cavity and communicates with each adsorption seat. The top end of the driving seat is provided with an air inlet.

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