A kind of metering current transformer fault detection device

Abstract

This utility model discloses a fault detection device for a current transformer, belonging to the technical field of detection devices. This fault detection device includes a support assembly, a fault detection assembly, a visual inspection assembly, and a discharge assembly. The fault detection assembly is positioned above the support assembly, while the visual inspection assembly and the discharge assembly are respectively positioned outside the support assembly. The support assembly includes a support platform with a circular hole on one side. A placement platform is installed inside the circular hole, with its upper end extending outside the hole. The placement platform is transparent. The visual inspection assembly includes a first bracket and a second bracket, respectively positioned at the upper and lower ends of the support platform. A first industrial camera is installed inside one end of each of the first and second brackets. A geared ring is connected to the upper end of the placement platform via a bearing. A vertical plate is installed on the top surface of the geared ring, and a second industrial camera is installed inside the vertical plate.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically a fault detection device for a current transformer. Background Technology

[0002] A metering current transformer is a specially designed current transformer whose core function is to provide a standardized secondary current signal proportional to the primary current for metering devices such as electricity meters, ensuring accurate metering of electricity consumption and fairness in electricity billing. Currently, current transformers need to be tested using a withstand voltage tester. One of the main uses of a withstand voltage tester is to perform withstand voltage tests on electrical equipment to check its insulation performance under high voltage. By applying an AC or DC voltage higher than the normal operating voltage, the tester checks whether the equipment can operate normally under a specified voltage without insulation breakdown. During withstand voltage testing, the withstand voltage tester needs to be connected to the current transformer with wires. Through withstand voltage testing, the insulation performance of the metering current transformer can be checked to ensure it meets standards, guaranteeing its safety under high voltage environments. Regular withstand voltage testing can effectively prevent faults in metering current transformers caused by insulation problems, ensuring the stable operation of the power system.

[0003] Based on the above, the inventors have discovered the following problems: current withstand voltage testing devices do not have visual inspection functions when testing current transformers. Generally, workers make visual observations. If there are cracks or defects on the surface of the current transformer that cannot be observed by the naked eye, it may affect the test results or even lead to safety accidents.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a fault detection device for metering current transformers, in order to achieve a more practical value. Utility Model Content

[0005] The purpose of this invention is to provide a fault detection device for current transformers to solve the problems mentioned in the background art.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] A fault detection device for a current transformer includes a support assembly, a fault detection assembly, a visual inspection assembly, and a discharge assembly. The fault detection assembly is disposed above the support assembly, while the visual inspection assembly and the discharge assembly are respectively disposed outside the support assembly. The support assembly includes a support platform with a circular hole on one side inside the platform. A placement platform is installed inside the circular hole, with its upper end extending outside the circular hole. The placement platform is transparent. The visual inspection assembly includes a first bracket and a second bracket, which are respectively disposed at the upper and lower ends of the support platform. A first industrial camera is installed inside one end of each of the first and second brackets. A gear ring is connected to the upper end of the placement platform via a bearing. A vertical plate is mounted on the top surface of the gear ring, and a second industrial camera is installed inside the vertical plate.

[0008] Furthermore, a servo motor is installed on one side of the bottom of the support platform. The output end of the servo motor extends through the support platform to the outside, and the output end of the servo motor is connected to a gear, which meshes with the gear ring.

[0009] The beneficial effect of adopting the above-mentioned further solution is that by setting a servo motor, when the servo motor is working, it is easy to drive the gear to rotate. Since the gear and the gear ring mesh with each other, the gear ring can rotate. Since a vertical plate is installed on one side of the top surface of the gear ring, and a second industrial camera is installed inside the vertical plate, the rotation of the gear ring can drive the vertical plate installed on its top surface to rotate, and the second industrial camera on the vertical plate will rotate accordingly, realizing the appearance inspection of the metering current transformer placed on the placement platform at different angles.

[0010] Furthermore, the discharge assembly includes a connecting strip, a connecting seat is mounted on the top surface of the connecting strip, a first through hole is provided inside the connecting seat, a discharge rod is provided inside the first through hole, and the outer wall of the discharge rod is slidably engaged with the inner wall of the first through hole.

[0011] The beneficial effect of adopting the above-mentioned further solution is that, through the cooperation of the first through hole and the discharge rod, the discharge rod slides in the first through hole, which facilitates the adjustment of the position of the discharge rod. When the toothed ring rotates, there is a certain distance between the end of the second industrial camera away from the first industrial camera and the initial position of the discharge rod. After the appearance inspection and fault detection are completed, since there will be residual charge on the surface of the metering current transformer after fault detection, the discharge rod moves towards the direction of the first industrial camera, so that the discharge rod can perform a discharge operation on the metering current transformer after fault detection.

[0012] Furthermore, the connecting seat has a second through hole located below the first through hole. An electric telescopic rod is installed inside the second through hole. A connecting plate is installed at the movable end of the electric telescopic rod. The connecting plate is fixedly connected to one end of the discharge rod on the side near the electric telescopic rod.

[0013] The beneficial effect of adopting the above-mentioned further solution is that, by setting up an electric telescopic rod, after the fault detection is completed, the electric telescopic rod is activated, causing its movable end to continuously retract, and under the action of the connecting plate, it drives the discharge rod to continuously move towards the first industrial camera inside the first through hole.

[0014] Furthermore, the fault detection component includes a withstand voltage tester. The bottom end of the withstand voltage tester is fixedly connected to the support platform on the upper side away from the circular hole. A pair of wires are provided on the back of the withstand voltage tester. A lower locking seat is installed on the upper end of the support platform on one side of the withstand voltage tester. A pair of positioning holes are opened inside the lower locking seat. A positioning rod is provided inside each of the pair of positioning holes. An upper locking seat is installed at the top of the pair of positioning rods. A pair of grooves are opened on the opposite sides of the upper and lower locking seats. There are two through holes in the opposite pair of grooves. One end of each pair of wires passes through the two circular holes and is provided with a conductive connector.

[0015] The beneficial effect of adopting the above-mentioned further solution is that, through the cooperative use of the upper and lower locking seats, a pair of grooves are opened on the opposite side of the upper and lower locking seats, and wire holes are provided in the opposite pair of grooves. The wires pass through the wire holes, thereby managing the two wires. Since the wires are equipped with conductive joints, the withstand voltage tester can be connected to the current transformer to perform withstand voltage testing.

[0016] Furthermore, the outer wall of the positioning rod slides into the inner wall of the positioning hole, the bottom of the upper locking seat is provided with a first mounting groove on both sides, the upper end of the lower locking seat is provided with a second mounting groove on both sides, a first magnet is installed inside the two first mounting grooves, and a second magnet is installed inside the two second mounting grooves. The first magnet and the second magnet are magnetically attracted to each other.

[0017] The beneficial effects of adopting the above-mentioned further solution are that the sliding fit between the positioning rod and the positioning hole facilitates the installation and disassembly of the upper and lower locking seats, and the magnetic attraction between the first and second magnets makes the connection between the upper and lower locking seats tighter.

[0018] Furthermore, a pair of support legs are installed on both sides of the outer wall of the support platform.

[0019] The beneficial effect of adopting the above-mentioned further solution is that by setting support legs with a certain height, the bottom of the support platform is separated from the ground.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This current transformer fault detection device places the current transformer to be tested on a platform. First, a visual inspection is performed to detect cracks or defects on the surface of the current transformer that are not visible to the naked eye. If these defects exist, they may affect the test results or even lead to safety accidents, requiring immediate treatment or replacement. The platform is transparent, allowing the first industrial camera located above and below the platform to perform visual inspection of the top and bottom surfaces of the current transformer on the platform. By setting a second industrial camera, the side surfaces of the current transformer placed on the platform can be visually inspected. Simultaneously, during the side inspection, a servo motor is activated to drive the gear to rotate. Due to the meshing between the gear and the gear ring, the gear ring rotates. The rotation of the gear ring drives the vertical plate mounted on its top surface to rotate, and the second industrial camera on the vertical plate rotates accordingly, achieving a comprehensive visual inspection of the side surfaces of the current transformer placed on the platform. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of a fault detection device for a current transformer provided by this utility model;

[0022] Figure 2 A bottom-view three-dimensional structural diagram of a fault detection device for a current transformer provided by this utility model;

[0023] Figure 3 An exploded three-dimensional structural diagram of the discharge component of a fault detection device for a current transformer provided by this utility model;

[0024] Figure 4 An exploded three-dimensional structural diagram of the support platform and placement table of a fault detection device for a current transformer provided by this utility model.

[0025] Figure 5 This is a partial side cross-sectional view of the upper and lower locking seats of a current transformer fault detection device provided by this utility model.

[0026] In the diagram: 1. Support assembly; 11. Support platform; 12. Support leg; 13. Circular hole; 14. Placement platform; 2. Fault detection assembly; 21. Withstand pressure tester; 22. Lower clamping seat; 23. Positioning rod; 24. Upper clamping seat; 25. First magnet; 26. Second magnet; 27. Threading hole; 3. Appearance inspection assembly; 31. First bracket; 32. Second bracket; 33. First industrial camera; 34. Gear ring; 35. Vertical plate; 36. Second industrial camera; 37. Servo motor; 38. Gear; 4. Discharge assembly; 41. Connecting strip; 42. Connecting seat; 43. First through hole; 44. Discharge rod; 45. Second through hole; 46. Electric telescopic rod; 47. Connecting plate. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1-5This utility model provides a technical solution: a fault detection device for a current transformer, comprising a support assembly 1, a fault detection assembly 2, an appearance inspection assembly 3, and a discharge assembly 4. The fault detection assembly 2 is disposed above the support assembly 1, and the appearance inspection assembly 3 and the discharge assembly 4 are respectively disposed outside the support assembly 1. The support assembly 1 includes a support platform 11, with a circular hole 13 on one side inside the support platform 11. A placement platform 14 is installed inside the circular hole 13, and the upper end of the placement platform 14 extends to the outside of the circular hole 13. The placement platform 14 is transparent. The appearance inspection component 3 includes a first bracket 31 and a second bracket 32, which are respectively disposed at the upper and lower ends of the support platform 11. A first industrial camera 33 is installed inside one end of each of the first bracket 31 and the second bracket 32. A gear ring 34 is connected to the upper exterior of the placement table 14 via a bearing. A vertical plate 35 is installed on the top surface of the gear ring 34, and a second industrial camera 36 is installed inside the vertical plate 35. A servo motor 37 is installed on one side of the bottom end of the support platform 11, and the output end of the servo motor 37 extends through the support platform 11 to... Externally, the output end of the servo motor 37 is connected to a gear 38, which meshes with the gear ring 34. The current transformer to be fault-tested is placed on the placement platform 14. First, a visual inspection is performed to check for cracks or defects on the surface of the current transformer that are not visible to the naked eye. If such defects exist, they may affect the test results or even lead to safety accidents, and must be repaired or replaced. The placement platform 14 is transparent, allowing the first industrial camera 33 located above and below the placement platform 14 to observe the current transformer on the placement platform 14. The top and bottom surfaces of the current transformer are inspected. By setting a second industrial camera 36, ​​the side surfaces of the current transformer placed on the platform 14 can be inspected. During the side inspection, the servo motor 37 is started to drive the gear 38 to rotate. Since the gear 38 and the gear ring 34 mesh with each other, the gear ring 34 rotates. The rotation of the gear ring 34 drives the vertical plate 35 mounted on its top surface to rotate. The second industrial camera 36 on the vertical plate 35 rotates accordingly, realizing a full-range appearance inspection of the side surfaces of the current transformer placed on the platform 14.

[0029] 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.

[0030] Please see Figures 1-5This utility model provides a technical solution: the discharge assembly 4 includes a connecting strip 41, a connecting seat 42 is installed on the top surface of the connecting strip 41, a first through hole 43 is opened inside the connecting seat 42, a discharge rod 44 is installed inside the first through hole 43, the outer wall of the discharge rod 44 slides with the inner wall of the first through hole 43, a second through hole 45 is opened inside the connecting seat 42 below the first through hole 43, an electric telescopic rod 46 is installed inside the second through hole 45, a connecting plate 47 is installed on the movable end of the electric telescopic rod 46, and the connecting plate 47 is close to the discharge rod 46. One side of the movable telescopic rod 46 is fixedly connected to one end of the discharge rod 44. After the appearance inspection and fault detection are completed, since there will be residual charge on the surface of the metering current transformer after the fault detection, the voltage of the withstand voltage tester 21 is first reduced to zero, then the power is cut off, the electric telescopic rod 46 is started, so that its movable end continuously retracts, and under the action of the connecting plate 47, the discharge rod 44 is driven to move continuously towards the first industrial camera 33 inside the first through hole 43, so that the discharge rod 44 can perform a discharge operation on the metering current transformer after the fault detection.

[0031] 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.

[0032] Please see Figures 1-5This utility model provides a technical solution: the fault detection component 2 includes a withstand voltage tester 21. The bottom end of the withstand voltage tester 21 is fixedly connected to the support platform 11 on the upper side away from the circular hole 13. A pair of wires are provided on the back of the withstand voltage tester 21. A lower locking seat 22 is installed on the upper end of the support platform 11 on one side of the withstand voltage tester 21. A pair of positioning holes are opened inside the lower locking seat 22. A positioning rod 23 is provided inside each of the pair of positioning holes. An upper locking seat 24 is installed at the top of the pair of positioning rods 23. A pair of grooves are opened on the opposite sides of the upper locking seat 24 and the lower locking seat 22. The opposite pair of grooves have wire holes 27. There are two circular holes 13. One end of each pair of wires passes through the two circular holes 13 respectively and is provided with a conductive connector. The positioning rods 23... The outer wall slides into the inner wall of the positioning hole. The bottom of the upper locking seat 24 has a first mounting groove on both sides, and the upper end of the lower locking seat 22 has a second mounting groove on both sides. A first magnet 25 is installed inside each of the two first mounting grooves, and a second magnet 26 is installed inside each of the two second mounting grooves. The first magnet 25 and the second magnet 26 are magnetically attracted to each other. A pair of support legs 12 are installed on both sides of the outer wall of the support platform 11. Due to the conductive connector of the wire, the withstand voltage tester 21 can be connected to the current transformer to perform withstand voltage testing. The principle of the withstand voltage tester 21 is based on the existing publicly available technical means. For reference, the withstand voltage tester 21 in the power-on testing device of the circuit board of an environmental test chamber disclosed in Chinese Patent No. CN219831344U can be used.

[0033] Specifically, the working principle of this current transformer fault detection device is as follows: During use, the current transformer to be tested is placed on the placement platform 14. First, a visual inspection is performed to check for cracks or defects on the surface of the current transformer that are not visible to the naked eye. If these defects exist, they may affect the test results or even lead to safety accidents, requiring immediate repair or replacement. The placement platform 14 is transparent, allowing the first industrial camera 33, located above and below the platform, to visually inspect the top and bottom surfaces of the current transformer on the platform. A second industrial camera 36 is used to visually inspect the sides of the current transformer placed on the platform. Simultaneously, during the side inspection, the servo motor 37 is activated, driving the gear 38 to rotate. Because the gear 38 and the gear ring 34 mesh with each other, the gear ring 34 rotates. The toothed ring 34 rotates, causing the vertical plate 35 mounted on its top surface to rotate. The second industrial camera 36 on the vertical plate 35 rotates accordingly, enabling a full-range visual inspection of the side of the metering current transformer placed on the placement platform 14. After the inspection is completed, the withstand voltage tester 21 can be connected to the metering current transformer due to the conductive connector on the wire. The withstand voltage tester 21 is started to perform a withstand voltage test. After the visual inspection and fault detection are completed, since there will be residual charge on the surface of the metering current transformer after the fault detection, the voltage of the withstand voltage tester 21 is first reduced to zero, and then the power is cut off. The electric telescopic rod 46 is started, causing its movable end to continuously retract. Under the action of the connecting plate 47, the discharge rod 44 is driven to continuously move towards the first industrial camera 33 inside the first through hole 43, so that the discharge rod 44 can perform a discharge operation on the metering current transformer after the fault detection.

Claims

1. A metering current transformer fault detection device, characterized by, The system includes a support assembly (1), a fault detection assembly (2), an appearance inspection assembly (3), and a discharge assembly (4). The fault detection assembly (2) is positioned above the support assembly (1). The appearance inspection assembly (3) and the discharge assembly (4) are respectively positioned outside the support assembly (1). The support assembly (1) includes a support platform (11). A circular hole (13) is provided on one side of the support platform (11). A placement platform (14) is installed inside the circular hole (13). The upper end of the placement platform (14) extends to the outside of the circular hole (13). The placement platform (14) is transparent. The appearance inspection component (3) includes a first bracket (31) and a second bracket (32). The first bracket (31) and the second bracket (32) are respectively located at the upper and lower ends of the support platform (11). A first industrial camera (33) is installed inside one end of the first bracket (31) and the second bracket (32). A toothed ring (34) is connected to the upper end of the placement platform (14) through a bearing. A vertical plate (35) is installed on the top surface of the toothed ring (34). A second industrial camera (36) is installed inside the vertical plate (35).

2. A fault detection apparatus for a current transformer according to claim 1, wherein A servo motor (37) is installed on one side of the bottom of the support platform (11). The output end of the servo motor (37) extends through the support platform (11) to the outside. The output end of the servo motor (37) is connected to a gear (38). The gear (38) and the gear ring (34) mesh with each other.

3. A fault detection device for a current transformer according to claim 1, wherein, The discharge assembly (4) includes a connecting strip (41), and a connecting seat (42) is installed on the top surface of the connecting strip (41). A first through hole (43) is opened inside the connecting seat (42), and a discharge rod (44) is provided inside the first through hole (43). The outer wall of the discharge rod (44) slides with the inner wall of the first through hole (43).

4. A power current transformer fault detection apparatus according to claim 3, wherein, The connecting seat (42) has a second through hole (45) located below the first through hole (43). An electric telescopic rod (46) is installed inside the second through hole (45). A connecting plate (47) is installed on the movable end of the electric telescopic rod (46). The connecting plate (47) is fixedly connected to one end of the discharge rod (44) on the side near the electric telescopic rod (46).

5. A power current transformer fault detection device according to claim 1, wherein, The fault detection component (2) includes a withstand voltage tester (21). The bottom end of the withstand voltage tester (21) is fixedly connected to the support platform (11) on the upper side away from the round hole (13). A pair of wires are provided on the back of the withstand voltage tester (21). A lower locking seat (22) is installed on the upper end of the support platform (11) on one side of the withstand voltage tester (21). A pair of positioning holes are provided inside the lower locking seat (22). A positioning rod (23) is provided inside each of the pair of positioning holes. An upper locking seat (24) is installed at the top of the pair of positioning rods (23). A pair of grooves are provided on the opposite side of the upper locking seat (24) and the lower locking seat (22). A wire hole (27) is provided in the opposite pair of grooves. There are two round holes (13). One end of each pair of wires passes through the two round holes (13) respectively and is provided with a conductive connector.

6. A power current transformer fault detection apparatus according to claim 5, wherein, The outer wall of the positioning rod (23) slides with the inner wall of the positioning hole. The bottom two sides of the upper locking seat (24) are provided with first mounting grooves, and the upper two sides of the lower locking seat (22) are provided with second mounting grooves. The two first mounting grooves are each equipped with a first magnet (25), and the two second mounting grooves are each equipped with a second magnet (26). The first magnet (25) and the second magnet (26) are magnetically attracted to each other.

7. A power current transformer fault detection apparatus according to claim 1, wherein, A pair of support legs (12) are installed on both sides of the outer wall of the support platform (11).

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