A detection device for a circuit breaker porcelain bushing

Abstract

The utility model discloses a circuit breaker porcelain bushing's detection device, including detection base, the both sides of the top of detection base are equipped with the supporting plate, the top of detection base is equipped with the bearing plate, the top rear side of bearing plate is equipped with chuck, is provided with ceramic pipe on the chuck, the inner wall of two supporting plates is installed with fixed base, is equipped with equipment carrier pole on the fixed base, the end of equipment carrier pole is equipped with detection camera, the setting of circuit breaker porcelain bushing's detection device, and detection device is through setting up the clamping groove of triangle distribution in chuck lateral wall, and cooperates clamping assembly, utilizes the lamination of clamping block's and ceramic pipe lamination, can stably fix circuit breaker porcelain bushing. Meanwhile, the cooperation of telescopic link, spring, extruding nut and other components in clamping assembly, can be flexibly adjusted according to different specifications porcelain bushing, need not frequently replace clamping part, has improved the adaptability of detection device to different porcelain bushing greatly.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically a testing device for circuit breaker porcelain bushings. Background Technology

[0002] In power systems, circuit breaker porcelain bushings are critical components, and their performance directly affects the safe and stable operation of power equipment. Traditional circuit breaker porcelain bushing testing methods suffer from several problems. Firstly, existing testing devices often employ simple clamping methods to fix the porcelain bushings, making it difficult to guarantee their stability during testing. Furthermore, they have poor adaptability to different specifications of porcelain bushings, requiring frequent replacement of clamping components and reducing testing efficiency. Secondly, the position and angle adjustment of the testing equipment are inconvenient during testing, preventing comprehensive and high-precision testing of the porcelain bushings. This can easily lead to blind spots, making it difficult to detect some defects in a timely manner, affecting the accuracy and reliability of the test results. With the increasing demands for equipment reliability in power systems, there is an urgent need for a testing device that can stably fix porcelain bushings and flexibly adjust the testing equipment to meet the requirements of efficient and accurate testing. Summary of the Invention

[0003] The purpose of this invention is to provide a testing device for circuit breaker porcelain bushings to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a testing device for circuit breaker porcelain bushings, comprising a testing base, support plates mounted on both sides of the top of the testing base, and a bearing plate mounted on the top of the testing base; a chuck mounted on the rear side of the top of the bearing plate, on which a ceramic tube is disposed; a fixing seat mounted on the inner wall of the two support plates, an equipment carrier rod mounted on the fixing seat, and a testing camera mounted on the end of the equipment carrier rod; three clamping slots are provided on the side wall of the chuck, two of the clamping slots being triangularly distributed, and a clamping block being installed inside each clamping slot, the side wall of the clamping block having a contact surface, and the contact surface being in contact with the ceramic tube.

[0005] As a preferred embodiment of the detection device for circuit breaker porcelain bushings of this utility model, the clamping groove is equipped with a clamping assembly. The clamping assembly includes a fixed cylinder installed inside the clamping groove and a turntable installed on the side wall of the clamping block. A telescopic rod is vertically installed on the side wall of the turntable, and the end of the telescopic rod is disposed inside the fixed cylinder.

[0006] As a preferred embodiment of the detection device for circuit breaker porcelain bushings of this utility model, a compression disc is fitted around the telescopic rod, a spring is fitted around the telescopic rod between the compression disc and the turntable, an external thread is provided on the telescopic rod, a compression nut is screwed onto the external thread of the telescopic rod, a fastening screw is provided at the center of the inside of the fixed cylinder, a fastening screw groove is provided at the end of the telescopic rod, and after the fixed cylinder is fitted around the telescopic rod, the fastening screw is screwed into the fastening screw groove.

[0007] As a preferred embodiment of the detection device for circuit breaker porcelain bushings of this utility model, anti-detachment rods are installed at both ends of the outer side of the fixed cylinder, and an annular stepped groove is provided on the side wall of the compression nut, with the end of the anti-detachment rod disposed in the annular stepped groove.

[0008] As a preferred embodiment of the detection device for circuit breaker porcelain bushings according to this utility model, the inner wall of the anti-detachment rod is provided with helical teeth, which mesh with the external thread of the telescopic rod.

[0009] As a component of this utility model, the outer wall of the circular sleeve is provided with a limiting screw hole, and the top two sides of the bearing plate are equipped with rollers, which are located at the bottom end of the ceramic tube.

[0010] Compared with the prior art, the beneficial effects of this utility model are: the setting of the detection device for the porcelain bushing of the circuit breaker is reasonably designed; This testing device utilizes triangularly distributed clamping slots on the side wall of the chuck, along with a clamping assembly, to stably secure the circuit breaker porcelain bushing by adhering the contact surface of the clamping block to the ceramic tube. Furthermore, the coordination of components such as the telescopic rod, spring, and compression nut within the clamping assembly allows for flexible adjustment to accommodate different specifications of porcelain bushings, eliminating the need for frequent replacements and significantly improving the device's adaptability to various porcelain bushings, thus meeting diverse testing requirements. The combination of the fixed base, equipment carrier rod, and detection camera installed on the inner wall of the two support plates allows for easy adjustment of the position and angle of the detection camera, enabling all-round imaging and detection of the circuit breaker porcelain bushing. This effectively avoids blind spots in the detection, ensures that defects on the surface of the porcelain bushing can be accurately captured, and improves the accuracy and reliability of the detection results. Attached Figure Description

[0011] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the chuck of this utility model; Figure 3 This is a schematic diagram of the clamping component of this utility model; Figure 4 This is a schematic diagram of the fixing cylinder of this utility model.

[0012] In the diagram: 1. Detection base; 2. Bearing plate; 3. Support plate; 4. Chuck; 5. Ceramic tube; 6. Fixing seat; 7. Equipment carrier rod; 8. Detection camera; 9. Idler roller; 10. Contact surface; 11. Telescopic rod; 12. Spring; 13. Turntable; 14. External thread; 15. Extrusion plate; 16. Fixing cylinder; 17. Fastening screw groove; 18. Annular stepped groove; 19. Extrusion nut; 20. Fastening screw; 21. Anti-disengagement rod; 22. Helical teeth; 23. Clamping block; 24. Clamping assembly; 25. Clamping groove. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-4 This utility model provides a technical solution: In this technical solution, a testing device for circuit breaker porcelain bushings includes a testing base 1. Support plates 3 are mounted on both sides of the top of the testing base 1, and a bearing plate 2 is mounted on the top of the testing base 1. A chuck 4 is mounted on the rear side of the top of the bearing plate 2, and a ceramic tube 5 is disposed on the chuck 4. Fixing seats 6 are installed on the inner walls of the two support plates 3, and equipment carrier rods 7 are mounted on the fixing seats 6. A testing camera 8 is mounted on the end of the equipment carrier rods 7. Three clamping slots 25 are opened on the side wall of the chuck 4. The two clamping slots 25 are triangularly distributed. A clamping block 23 is installed inside each clamping slot 25. A contact surface 10 is opened on the side wall of the clamping block 23, and the contact surface 10 is in contact with the ceramic tube 5.

[0015] The testing base 1, as the fundamental support structure of the entire testing device, must possess sufficient strength and stability. It is typically made of high-quality steel, such as Q345 steel, with a yield strength of not less than 345MPa, capable of withstanding the weight of various components and the porcelain sleeve during testing, ensuring the device does not shake or shift during operation. The dimensions of the base need to be designed according to the actual usage scenario and the specifications of the porcelain sleeve being tested, generally with a length of 1-2 meters, a width of 0.8-1.5 meters, and a height of 0.5-1 meter, ensuring sufficient space to accommodate other components and facilitating operation. The support plate 3 is used to support and fix components such as the mounting base 6 that will be installed later, and its material and structural strength are also subject to high requirements. Aluminum alloy, such as 6061 aluminum alloy, can be used, as it has good strength and corrosion resistance, and its tensile strength can reach over 205 MPa. The height of the support plate 3 is generally designed to be 0.5-1 meter to facilitate adjustment of the detection camera 8 to a suitable detection height. The width and thickness are determined based on the mechanical calculations of the overall structure, typically with a width of 0.1-0.2 meters and a thickness of 0.03-0.05 meters. During installation, the support plate 3 is connected to the detection base 1 using high-strength bolts, with bolt specifications ranging from M12 to M16, to ensure a secure connection. The support plate 2 is mainly used to support the chuck 4 and the ceramic tube 5 placed on the chuck 4. The support plate 2 can be made of stainless steel, such as 304 stainless steel, which has good rust resistance. Its size needs to be slightly larger than the diameter of the chuck 4, generally 0.1-0.2 meters larger than the chuck 4, and the thickness is 0.03-0.05 meters. The support plate 2 and the detection base 1 can be connected by welding or bolts. If welding is used, the weld must be uniform and firm, and the weld strength must not be lower than the strength of the base material. If bolts are used, the number of bolts is determined according to the size of the support plate, generally one bolt is arranged every 0.2-0.3 meters, and the specifications can also be M12-M16. Chuck 4 is used to fix the ceramic tube 5. Common chucks include three-jaw chucks and four-jaw chucks. A specially designed chuck is used here, with three clamping slots 25 on its side wall. The chuck 4 can be made of 45# steel and heat-treated to improve its overall mechanical properties, achieving a hardness of HB220-250. The diameter of the chuck 4 is designed according to the common outer diameter range of the ceramic tube 5 being tested, generally 0.2-0.5 meters, to accommodate different specifications of ceramic sleeves. The chuck 4 is assembled with the bearing plate 2 using locating pins and bolts. The locating pins ensure the accuracy of the chuck 4's installation position. The bolts can be M10-M12, evenly distributed on the circumference of the chuck 4, typically 4-6 in number. The ceramic bushing (5), also known as the porcelain bushing of a circuit breaker, is the object of inspection. It comes in various specifications, with common outer diameters ranging from 0.05 to 0.3 meters and lengths from 0.5 to 2 meters. Different specifications of ceramic bushings (5) are used in different scenarios and voltage levels within the power system. For example, smaller outer diameters and shorter lengths may be used in low-voltage circuit breakers, while larger outer diameters and longer lengths are used in high-voltage or even ultra-high-voltage circuit breakers. During inspection, the relevant parameters and component positions of the inspection device must be adjusted according to the actual specifications of the ceramic bushing (5). The mounting base 6 is used to install the equipment carrier rod 7, and it can be connected to the support plate 3 by welding or bolting. The mounting base 6 can be made of the same 6061 aluminum alloy as the support plate 3, and its shape is designed to fit tightly against the inner wall of the support plate 3 and stably support the equipment carrier rod 7. It is generally L-shaped or U-shaped. The installation position of the mounting base 6 on the inner wall of the support plate 3 can be adjusted according to the actual testing requirements to enable the testing camera 8 to test different parts of the ceramic tube 5. It is usually installed at the middle position in the height direction of the support plate 3, with a deviation of no more than ±0.1 meters. The equipment carrier rod 7 is used to support the inspection camera 8 and needs to have a certain length and strength to ensure that the inspection camera 8 can cover the entire surface of the ceramic tube 5. The equipment carrier rod 7 can be made of hollow aluminum alloy, such as 7075 aluminum alloy, which has high strength and light weight, with an outer diameter of 0.02-0.05 meters, a wall thickness of 0.003-0.005 meters, and a length of 0.5-1 meters. The equipment carrier rod 7 is connected to the fixed base 6 by a threaded connection or a quick-connect coupling. If a threaded connection is used, the thread specification can be M16-M20 to ensure the stability of the connection and facilitate flexible adjustment of the angle and position of the equipment carrier rod 7 according to the inspection requirements. The inspection camera 8 is a key component for visual inspection of the ceramic tube 5. An industrial camera, such as a megapixel camera from a certain brand, with a resolution of 1280×1024 or higher, can be used to clearly capture minute defects on the surface of the ceramic tube 5, such as cracks with a width of less than 0.1mm. The inspection camera 8 is connected to the equipment carrier rod 7 via a dedicated camera mounting bracket. The bracket has multi-angle adjustment capabilities, allowing the camera to rotate ±45° horizontally and vertically to meet the needs of shooting the ceramic tube 5 from different angles. The camera's shooting parameters, such as exposure time and ISO, can be adjusted according to the material and color of the ceramic tube 5 and the lighting conditions of the inspection environment. Generally, the exposure time is between 1 / 1000 and 1 / 100 second, and the ISO is between ISO 200 and ISO 800. The three clamping slots 25 are arranged in a specific triangle. This arrangement provides stable three-point support for the ceramic tube 5, ensuring its stability during testing. The depth and width of the clamping slots 25 are designed based on the clamping block 23 and the outer diameter of the ceramic tube 5. The depth is generally 0.03-0.05 meters, and the width is 0.04-0.06 meters to ensure that the clamping block 23 can be firmly installed in the clamping slots 25 and effectively clamp the ceramic tube 5. The clamping slots 25 require high machining precision; the roughness Ra of the slot wall should not exceed 3.2 μm to ensure the fitting accuracy between the clamping block 23 and the clamping slots 25. The clamping block 23 directly contacts the ceramic tube 5 and provides fixation. Its material should possess a certain degree of elasticity and wear resistance; a rubber-metal composite material can be used, for example, a rubber layer with a thickness of 0.01-0.02 meters vulcanized on the surface of the metal block. The metal block can be made of aluminum alloy to reduce weight while ensuring strength. The shape of the clamping block 23 is designed to fit the outer wall of the ceramic tube 5, generally in an arc shape, with the curvature matching the outer diameter of a common ceramic tube 5, with a deviation within ±0.005 meters, ensuring a tight fit between the contact surface 10 and the ceramic tube 5. The contact surface 10 is the key part where the clamping block 23 contacts the ceramic tube 5. Its surface roughness Ra should not exceed 1.6μm to increase friction and ensure tight contact. The curvature of the contact surface 10 requires high machining accuracy and needs to be customized according to the outer diameter of the ceramic tube 5 to ensure that pressure can be applied evenly during clamping and to avoid local damage to the ceramic tube 5. In practical applications, multiple sets of clamping blocks 23 with different curvatures can be prepared for ceramic tubes 5 with different outer diameters. By changing the clamping blocks 23, stable clamping of ceramic tubes of different specifications can be achieved.

[0016] In some technical solutions, a clamping assembly 24 is installed inside the clamping groove 25. The clamping assembly 24 includes a fixed cylinder 16 installed inside the clamping groove 25 and a turntable 13 installed on the side wall of the clamping block 23. A telescopic rod 11 is vertically installed on the side wall of the turntable 13, and the end of the telescopic rod 11 is located inside the fixed cylinder 16.

[0017] The clamping assembly 24 is used to further enhance the clamping effect on the ceramic tube 5 and to achieve certain adjustment functions. It consists of multiple parts and is installed inside the clamping groove 25. The connection with the clamping groove 25 can be by bolt or snap-fit. When designing, the overall size of the clamping assembly 24 should be compatible with the clamping groove 25. Its maximum outer diameter should be smaller than the width of the clamping groove 25, and a gap of 0.005-0.01 meters is generally reserved to facilitate installation and adjustment. The fixing cylinder 16 serves as the fixing base for the clamping assembly 24. It is installed within the clamping groove 25 and can be fixed to the clamping groove 25 by welding or bolts. Bolt specifications can be M8-M10. The fixing cylinder 16 is made of 45# steel, and after quenching, its hardness reaches HRC40-45 to ensure its strength and wear resistance. The length of the fixing cylinder 16 is generally 0.08-0.12 meters, and its inner diameter is designed according to the outer diameter of the telescopic rod 11, with a clearance of 0.002-0.003 meters to facilitate the insertion and movement of the telescopic rod 11. The turntable 13 is installed on the side wall of the clamping block 23 and connected to the clamping block 23 by a pin. The pin diameter is 0.01-0.015 meters to ensure that the turntable 13 can rotate flexibly. The turntable 13 can also be made of aluminum alloy, with a diameter generally 0.05-0.08 meters and a thickness of 0.02-0.03 meters. The telescopic rod 11 can be made of stainless steel, such as 316 stainless steel, which has good corrosion resistance and strength. The outer diameter of the telescopic rod 11 is 0.01-0.015 meters, the inner diameter is 0.006-0.01 meters, and the length is 0.1-0.15 meters. The depth to which its end is inserted into the fixed cylinder 16 is generally 0.05-0.08 meters. With this structure, when the turntable 13 rotates, it can drive the telescopic rod 11 to extend and retract within the fixed cylinder 16, thereby adjusting the distance between the clamping block 23 and the ceramic tube 5, achieving adaptive clamping of ceramic tubes 5 with different outer diameters. The telescopic rod 11 and the turntable 13 are connected by welding or thread. If a threaded connection is used, the thread specification can be M8-M10 to ensure a firm connection.

[0018] In some technical solutions, a compression plate 15 is fitted on the outside of the telescopic rod 11, a spring 12 is fitted on the outside of the telescopic rod 11 between the compression plate 15 and the turntable 13, an external thread 14 is provided on the outside of the telescopic rod 11, a compression nut 19 is screwed onto the external thread 14 on the outside of the telescopic rod 11, a fastening screw 20 is provided at the center of the inside of the fixing cylinder 16, a fastening screw groove 17 is provided at the end of the telescopic rod 11, and after the fixing cylinder 16 is fitted on the outside of the telescopic rod 11, the fastening screw 20 is screwed into the fastening screw groove 17.

[0019] The compression plate 15 is used to adjust the compression degree of the spring 12, thereby controlling the clamping force. The compression plate 15 can be made of the same 316 stainless steel as the telescopic rod 11, with an outer diameter of 0.02-0.03 meters and a thickness of 0.01-0.015 meters. The compression plate 15 is fitted onto the telescopic rod 11 and can be connected to the telescopic rod 11 by a key, ensuring that the compression plate 15 can move with the telescopic rod 11 and rotate around the telescopic rod 11, so as to adjust the compression of the spring 12 by rotating the compression plate 15. Spring 12 is a key component providing clamping force, made of high-quality spring steel, such as 65Mn spring steel. The outer diameter of spring 12 is 0.025-0.035 meters, the inner diameter is 0.012-0.02 meters, and the free length is 0.08-0.12 meters. Its elastic modulus is selected according to the actual required clamping force, generally between 50-100 N / mm, and can automatically adjust the clamping force within a certain range to adapt to ceramic tubes 5 with different outer diameters, maintaining a stable clamping state during the testing process. During installation, both ends of spring 12 are in close contact with the pressing plate 15 and the turntable 13 respectively, ensuring that its force can be effectively transmitted. The specification of the external thread 14 is determined according to the outer diameter of the telescopic rod 11, generally M10-M14. The compression nut 19 mates with the external thread 14. By rotating the compression nut 19, the compression disc 15 can be moved along the telescopic rod 11, thereby precisely adjusting the compression degree of the spring 12 and achieving fine adjustment of the clamping force. The compression nut 19 is also made of 316 stainless steel, with a thickness of 0.015-0.025 meters and an outer diameter of 0.03-0.04 meters. The surface can be knurled to increase friction and facilitate operation. The fastening screw 20 is used to securely connect the telescopic rod 11 to the fixed cylinder 16, preventing the telescopic rod 11 from coming out of the fixed cylinder 16 during testing. The fastening screw 20 is made of 45# steel, and its hardness reaches HB220-250 after heat treatment. Its diameter is determined based on the inner diameter of the fixed cylinder 16 and the end structure of the telescopic rod 11, generally between 0.008-0.012 meters, and its length is between 0.03-0.05 meters. The fastening screw groove 17 is located at the end of the telescopic rod 11, with a depth of 0.015-0.025 meters, matching the thread of the fastening screw 20. The thread accuracy reaches 6H grade, ensuring reliable connection. During installation, after fitting the fixed cylinder 16 onto the outside of the telescopic rod 11, the fastening screw 20 is tightened to screw it into the fastening screw groove 17, achieving a secure connection.

[0020] In some technical solutions, anti-detachment rods 21 are installed at both ends of the outer side of the fixed cylinder 16, and an annular stepped groove 18 is opened on the side wall of the compression nut 19, with the end of the anti-detachment rod 21 set in the annular stepped groove 18.

[0021] This step is crucial for installing the clamping assembly 24. During installation, it is essential to ensure accurate alignment between the fastening screw 20 and the fastening screw groove 17 to avoid damage to the threads. Use appropriate tools, such as a torque wrench, to tighten the fastening screw 20 to the specified torque value, typically 10-20 N·m, to ensure the stability of the connection between the fixed cylinder 16 and the telescopic rod 11 and prevent loosening during testing, which could affect the test results. The anti-detachment rod 21 is used to further prevent the clamping nut 19 from detaching from the telescopic rod 11, increasing the reliability of the clamping assembly 24. The anti-detachment rod 21 is made of stainless steel, with a diameter of 0.005-0.008 meters and a length of 0.02-0.03 meters. One end is connected to the fixing cylinder 16 by welding or bolting, and the other end is set in the annular stepped groove 18 of the clamping nut 19. The installation position of the anti-detachment rod 21 needs to be precisely controlled to ensure that it can effectively limit the axial movement of the clamping nut 19 without affecting the normal rotational adjustment of the clamping nut 19.

[0022] In some technical solutions, the inner wall of the anti-detachment rod 21 is provided with helical teeth 22, which mesh with the external thread 14 of the telescopic rod 11.

[0023] The annular stepped groove 18 is designed to fit the end of the anti-detachment rod 21. The groove has a depth of 0.003-0.005 meters and a width of 0.006-0.008 meters, which can accommodate the end of the anti-detachment rod 21 and allow it to rotate within a certain range. With this structure, when the clamping nut 19 is rotated to adjust the clamping force, the anti-detachment rod 21 rotates accordingly within the annular stepped groove 18, while limiting the axial displacement of the clamping nut 19, ensuring stable adjustment of the clamping force and the overall reliability of the clamping assembly 24 during the testing process. The pitch of the helical teeth 22 is the same as the pitch of the external thread 14 of the telescopic rod 11, typically between 1.25 and 1.5 mm, with a tooth height of 0.002 to 0.003 meters. When the clamping nut 19 rotates, the engagement of the helical teeth 22 with the external thread 14 not only restricts the axial displacement of the clamping nut 19 but also assists in its rotation to a certain extent, making the adjustment process smoother. Simultaneously, this engagement structure increases the connection stability between the clamping nut 19 and the telescopic rod 11, preventing the clamping nut 19 from loosening due to vibration or other reasons during testing, further ensuring the stability of the clamping force and the normal operation of the testing device.

[0024] In some technical solutions, rollers 9 are mounted on both sides of the top of the bearing plate 2, and the rollers 9 are set at the bottom of the ceramic tube 5.

[0025] The idler roller 9 provides auxiliary support to the ceramic tube 5 at the bottom, reducing the burden on the clamping block 23 and further ensuring the stability of the ceramic tube 5 during the inspection process. The idler roller 9 can be made of rubber-coated metal roller, constructed from 45# steel, with an outer diameter of 0.03-0.05 meters and a length of 0.1-0.2 meters. Its surface is covered with a 0.005-0.01 meter thick layer of rubber to increase friction with the ceramic tube 5 and prevent damage to its surface. The idler roller 9 is mounted on a bracket via bearings. The bracket is bolted to the support plate 2, with bolt specifications ranging from M8 to M10.

[0026] Work process Porcelain bushing loading and initial positioning: Place the circuit breaker porcelain bushing on the rollers on both sides of the top of the support plate. The rollers provide initial support, keeping the porcelain bushing in a horizontal position. Then, slowly push the porcelain bushing towards the chuck until one end of the porcelain bushing is close to the chuck. Porcelain sleeve fixing: Rotating the turntable on the chuck causes the vertically mounted telescopic rod to extend and retract within the fixed cylinder. Adjusting the extension length of the telescopic rod according to the outer diameter of the porcelain sleeve allows the contact surface of the clamping block to gradually approach the outer wall of the porcelain sleeve. Once the contact surface contacts the outer wall, rotating the compression nut causes it to move along the external thread of the telescopic rod, pushing the compression disc to compress the spring. The compressed spring generates elastic force, which is transmitted to the clamping block through the compression disc and the telescopic rod, ensuring the clamping block clamps the porcelain sleeve tightly with appropriate clamping force, achieving stable fixing of the porcelain sleeve on the chuck. Simultaneously, the fastening screw inside the fixed cylinder is screwed into the fastening screw groove at the end of the telescopic rod, ensuring a secure connection between the telescopic rod and the fixed cylinder. The anti-disengagement rod on the outside of the fixed cylinder is positioned within the annular stepped groove of the compression nut, and the helical teeth on the inner wall of the anti-disengagement rod engage with the external thread of the telescopic rod, preventing the compression nut from loosening and disengaging during testing, thus ensuring stable clamping force. Equipment Adjustment: Adjust the equipment carrier rods on the inner walls of the two support plates according to the length and diameter of the porcelain sleeve and the testing requirements. The angle and position of the carrier rods can be flexibly changed via threaded connections or quick-connect couplings, thereby moving the end-mounted inspection camera to the appropriate testing position. Simultaneously, utilizing the multi-angle adjustment function of the inspection camera mounting base, the camera's angle can be adjusted horizontally and vertically to ensure that the camera can be aligned with the porcelain sleeve surface from all angles without blind spots. Furthermore, set the inspection camera's shooting parameters, such as exposure time and ISO, according to the material and color of the porcelain sleeve and the ambient lighting conditions. Inspection process: The inspection camera is activated to photograph the appearance of the porcelain bushing fixed on the chuck. The image captured by the inspection camera is transmitted to the subsequent image analysis and processing system (this system was not mentioned in the original plan and is a necessary component in practical applications). Image processing algorithms are used to analyze the surface of the porcelain bushing for defects such as cracks, breaks, and stains. Throughout the inspection process, the porcelain bushing is consistently supported and fixed by the clamping blocks and rollers on the chuck, ensuring the stability and accuracy of the inspection. Inspection Completion and Ceramic Sleeve Unloading: After inspection, rotate the compression nut in the opposite direction to allow the spring to gradually return to its original state, reducing the clamping force of the clamping block on the ceramic sleeve. Then, remove the ceramic sleeve from the chuck and place it in the designated position, completing one inspection cycle. Working principle The principle of porcelain sleeve fixing is based on three-point stable support and elastic clamping. The clamping components within the three triangularly distributed clamping slots on the chuck sidewall work together. The turntable drives the telescopic rod to extend and retract, accommodating porcelain sleeves of different outer diameters. The spring, under the action of the compression nut and compression disc, undergoes elastic deformation, converting the elastic force into pressure from the clamping blocks on the porcelain sleeve, achieving stable clamping. Fastening screws, anti-disengagement rods, and other components, through mechanical connections and meshing structures, ensure the stability of the clamping components under stress, preventing loosening and displacement, and ensuring the porcelain sleeve remains fixed during testing. The principle of camera adjustment: Utilizing an adjustable mechanical connection structure, a threaded connection or quick-connect coupling between the equipment carrier and the fixed base, and the multi-angle adjustment function of the camera mounting base, the camera's spatial position and shooting angle can be flexibly adjusted by changing the position and angle of the equipment carrier and the camera's posture. The aim is to enable the camera to cover the entire surface of the ceramic sleeve, acquiring comprehensive and clear image information to meet the inspection needs of ceramic sleeves of different specifications and shapes. Detection Principle: The detection camera, based on optical imaging principles, converts the light reflection from the surface of the porcelain bushing into an image signal. Different surface features (such as smooth surfaces, cracks, and damaged areas) have different light reflection and absorption characteristics, thus presenting different grayscale, texture, and other features in the image. The subsequent image analysis and processing system uses image recognition algorithms to analyze and compare these features with a preset database of normal image features or defect features to determine whether there are defects on the surface of the porcelain bushing. It also identifies and records information such as the type, location, and size of the defects, thus achieving visual inspection of the circuit breaker porcelain bushing.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A testing device for circuit breaker porcelain bushings, comprising a testing base (1), characterized in that, The top two sides of the detection base (1) are equipped with support plates (3), and the top of the detection base (1) is equipped with a bearing plate (2). The top rear side of the bearing plate (2) is equipped with a chuck (4), and a ceramic tube (5) is provided on the chuck (4). The inner walls of the two support plates (3) are fitted with fixing seats (6), and the fixing seats (6) are fitted with equipment carrier rods (7). The ends of the equipment carrier rods (7) are fitted with detection cameras (8). The chuck (4) has three clamping slots (25) on its side wall. Two of the clamping slots (25) are arranged in a triangle. Each clamping slot (25) has a clamping block (23) installed inside. The side wall of the clamping block (23) has a contact surface (10) and the contact surface (10) is in contact with the ceramic tube (5).

2. The detection device for circuit breaker porcelain bushings according to claim 1, characterized in that, The clamping groove (25) is equipped with a clamping assembly (24). The clamping assembly (24) includes a fixed cylinder (16) installed inside the clamping groove (25) and a turntable (13) installed on the side wall of the clamping block (23). A telescopic rod (11) is vertically installed on the side wall of the turntable (13), and the end of the telescopic rod (11) is located inside the fixed cylinder (16).

3. The detection device for circuit breaker porcelain bushings according to claim 2, characterized in that, The telescopic rod (11) is fitted with an extrusion plate (15) on its outside. A spring (12) is fitted between the extrusion plate (15) and the turntable (13) on the outside of the telescopic rod (11). The telescopic rod (11) is provided with an external thread (14). An extrusion nut (19) is screwed into the external thread (14) on the outside of the telescopic rod (11). A fastening screw (20) is provided at the center of the inside of the fixed cylinder (16). A fastening screw groove (17) is provided at the end of the telescopic rod (11). After the fixed cylinder (16) is fitted onto the outside of the telescopic rod (11), the fastening screw (20) is screwed into the fastening screw groove (17).

4. The detection device for circuit breaker porcelain bushings according to claim 3, characterized in that, Both ends of the fixed cylinder (16) are equipped with anti-detachment rods (21), and the side wall of the compression nut (19) is provided with an annular stepped groove (18), and the end of the anti-detachment rod (21) is set in the annular stepped groove (18).

5. The detection device for circuit breaker porcelain bushings according to claim 4, characterized in that, The inner wall of the anti-detachment rod (21) is provided with helical teeth (22), which mesh with the external thread (14) of the telescopic rod (11).

6. The detection device for circuit breaker porcelain bushings according to claim 1, characterized in that, The top two sides of the bearing plate (2) are equipped with rollers (9), which are located at the bottom of the ceramic tube (5).

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