An anti-interference electronic current transformer

Abstract

This utility model relates to the field of current transformer technology and discloses an anti-interference electronic current transformer. It solves the problems of existing current transformers being inconvenient to install and disassemble, leading to complex and time-consuming maintenance, increased labor costs and power outage repair time, difficulty in quickly replacing faulty equipment, and impacting power grid operating efficiency. The current transformer includes a mounting base, with a current transformer body mounted on top of the mounting base. The outer shell of the current transformer body is made of copper to prevent electromagnetic interference. A plug plate is fixedly installed at the bottom of the current transformer body, and a socket is opened at the top of the current transformer body. The plug plate is inserted into the socket. A first shaft seat is fixedly installed on the lower part of one side of the mounting base, and a drive rod is rotatably mounted inside the first shaft seat. A handwheel is fixedly installed at one end of the drive rod. This current transformer is very convenient to install and disassemble, reducing labor costs and power outage repair time, accelerating replacement in case of equipment failure, and ensuring power grid operating efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of current transformer technology, specifically an anti-interference electronic current transformer. Background Technology

[0002] Anti-interference electronic current transformers are a type of transformer implemented using electronic technology, applied in high-voltage power grids. They offer advantages such as strong electromagnetic interference resistance, small size, light weight, high accuracy, and good linearity. In high-voltage power grids, these transformers provide complete isolation between high and low voltage levels, ensuring high safety. They also possess excellent insulation properties, are coreless, and eliminate problems such as magnetic saturation and ferroresonance. The high-voltage and low-voltage sides are connected only by optical fiber, with signals transmitted via fiber optics. The high-voltage circuit and secondary circuit are electrically isolated, providing excellent electromagnetic interference resistance and eliminating the risk of high voltage caused by open circuits on the low-voltage side. Furthermore, these transformers exhibit strong anti-interference capabilities for data transmission. While the current flowing through the current transformer is relatively small during normal grid operation, the short-circuit current is generally large, and this increases with grid capacity. The anti-interference electronic current transformer has a wide dynamic range, simultaneously meeting the needs of measurement and relay protection. An existing patent (publication number: CN207134232U) discloses an electronic current transformer. This electronic current transformer enhances safety by improving the adjusting rod and using components such as an insulating plate, guide rod, force spring, conductive ring, and insulated ball screw, avoiding damage caused by a sudden influx of high-intensity current into the input interface. However, this current transformer is very inconvenient to disassemble and assemble, resulting in complex and time-consuming maintenance operations, increased labor costs and power outage repair time, difficulty in quickly replacing the equipment when it fails, affecting the efficiency of power grid operation, and the long-term inconvenience of disassembly and assembly can easily lead to component aging or damage, making repair difficult and reducing equipment reliability and service life. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides an anti-interference electronic current transformer, which effectively solves the problems of the inconvenience of disassembling and assembling the existing current transformer, which leads to complicated and time-consuming operation during maintenance, increased labor costs and power outage maintenance time, difficulty in quickly replacing the equipment when it fails, and affects the efficiency of power grid operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-interference electronic current transformer, including a mounting base, a current transformer body on top of the mounting base, the outer shell of the current transformer body being made of copper to prevent electromagnetic interference, a plug plate fixedly mounted on the bottom of the current transformer body, an insertion port on the upper part of the current transformer body, the plug plate being inserted into the insertion port, a first shaft seat fixedly mounted on the lower part of one side of the mounting base, a drive rod rotatably mounted inside the first shaft seat, a handwheel fixedly mounted on one end of the drive rod, positioning grooves on both ends of the upper part of the plug plate, positioning heads inside the two positioning grooves, the other end of the drive rod extending into the interior of the mounting base and having a transmission assembly, the transmission assembly being connected to the two positioning heads in a transmission connection, when the handwheel drives the drive rod to rotate, it outputs power to the two positioning heads, causing the two positioning heads to be pressed and limited or released from the limit.

[0005] Preferably, the transmission assembly includes a driving bevel gear, which is fixedly mounted on the end of the drive rod away from the handwheel. A second bearing is rotatably mounted on the surface of the drive rod near the driving bevel gear. The bottom of the second bearing is fixedly connected to the inner bottom of the mounting base. A driven bevel gear is meshed with one side of the surface of the driving bevel gear. A shaft is fixedly mounted in the middle of the driven bevel gear. Two bushings are rotatably mounted on the surface of the shaft. The bottoms of both bushings are fixedly connected to the inner bottom of the mounting base.

[0006] Preferably, threaded rods are fixedly installed at both ends of the shaft, threaded sleeves are threadedly connected to the surfaces of the two threaded rods, connecting brackets are fixedly installed at the ends of the two threaded sleeves that are far apart from each other, pins are fixedly installed at the ends of the two connecting brackets that are far apart from each other, sliders are fixedly installed at the lower part of the threaded sleeves, and sliding grooves are opened on both sides of the bottom of the mounting base, and the two sliders are slidably installed inside the two sliding grooves.

[0007] Preferably, each of the pins is fitted with a transmission strip, and each of the two transmission strips is fixedly mounted with a pressure strip at its top. Each of the two pressure strips is fixedly mounted with a rotating shaft at one end. Both ends of the two rotating shafts are rotatably connected to the inner walls of both ends of the mounting base through a rotating seat. The lower parts of the two pressure strips, which are close to each other at one end, are fixedly connected to two positioning heads respectively.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: Before installation, the mounting base is welded to the installation position; during installation, the operator inserts the plug plate at the bottom of the current transformer body into the socket, and then rotates the handwheel in the forward direction. When the handwheel rotates, it drives the drive rod to rotate inside the first and second shaft seats. When the drive rod rotates, it drives the driven bevel gear to rotate through the active bevel gear. When the driven bevel gear rotates, it drives the shaft to rotate inside the two bushings. When the shaft rotates, it drives the two threaded sleeves to move in opposite directions through the two threaded rods. When the two threaded sleeves move, they both drive the slider to slide inside the slide groove, which increases the stability of the two threaded sleeves when they move. When the two threaded sleeves move in opposite directions, they drive the two pins to move in opposite directions through the two connecting brackets. When the two pins move in opposite directions, they drive the two pressure bars to rotate in opposite directions along the two rotating shafts through the two transmission bars, thereby driving the two positioning heads to press into the interior of the two positioning grooves to fix the plug plate, thus quickly completing the installation of the current transformer body. During disassembly, the operator rotates the handwheel in the opposite direction. This rotation drives two threaded sleeves to move towards each other via two threaded rods. As the sleeves move, they in turn drive two pins to move towards each other via a connecting bracket. This movement of the pins then rotates two pressure bars upwards, causing the two positioning heads to move out of their respective positioning slots and release the fixing to the plug plate. This allows for quick disassembly of the current transformer body. This makes disassembly and assembly of the current transformer extremely convenient, reducing labor costs and downtime for maintenance, accelerating equipment replacement in case of failure, and ensuring grid operating efficiency. Attached Figure Description

[0009] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0010] In the attached diagram: Figure 1 This is a schematic diagram of the anti-interference electronic current transformer of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the anti-interference electronic current transformer of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the mounting base of this utility model. Figure 1 ; Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the internal structure of the mounting base of this utility model. Figure 2 ; In the diagram: 1. Mounting base; 2. Current transformer body; 3. Insert plate; 4. Socket; 5. Handwheel; 6. Positioning groove; 7. Positioning head; 8. Drive rod; 9. First shaft seat; 10. Second shaft seat; 11. Driving bevel gear; 12. Driven bevel gear; 13. Shaft; 14. Bushing; 15. Threaded rod; 16. Threaded sleeve; 17. Slider; 18. Slide groove; 19. Connecting frame; 20. Pin; 21. Transmission bar; 22. Pressure bar; 23. Rotating shaft; 24. Rotating seat. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0012] Depend on Figures 1 to 5 The present invention includes a mounting base 1, with a current transformer body 2 mounted on top of the mounting base 1. The outer shell of the current transformer body 2 is made of copper to prevent electromagnetic interference. A plug plate 3 is fixedly mounted on the bottom of the current transformer body 2. A socket 4 is opened on the upper part of the current transformer body 2, and the plug plate 3 is inserted into the socket 4. A first bearing 9 is fixedly mounted on the lower part of one side of the mounting base 1. A drive rod 8 is rotatably mounted inside the first bearing 9. A handwheel 5 is fixedly mounted on one end of the drive rod 8. Positioning grooves 6 are opened on both ends of the upper part of the plug plate 3. Positioning heads 7 are provided inside the two positioning grooves 6. The other end of the drive rod 8 extends into the interior of the mounting base 1 and is provided with a transmission component. The transmission component is connected to the two positioning heads 7. When the handwheel 5 drives the drive rod 8 to rotate, it will output power to the two positioning heads 7, causing the two positioning heads 7 to be pressed and limited or released from the limit.

[0013] Before installation, the mounting base 1 is welded to the installation position. During installation, the operator inserts the plug plate 3 at the bottom of the current transformer body 2 into the socket 4, and then rotates the handwheel 5 in the forward direction. When the handwheel 5 rotates, it drives the drive rod 8 to rotate inside the first shaft seat 9 and the second shaft seat 10. When the drive rod 8 rotates, it drives the two positioning heads 7 to press into the two positioning slots 6 through the transmission component to fix the plug plate 3, thereby quickly completing the installation of the current transformer body 2. During disassembly, the operator rotates the handwheel 5 in the opposite direction. When the handwheel 5 rotates in the opposite direction, it drives the two positioning heads 7 to move out of the two positioning slots 6 through the transmission component, thereby releasing the fixation of the plug plate 3. This allows for the quick disassembly of the current transformer body 2. This makes the disassembly and assembly of the current transformer very convenient, reduces labor costs and power outage maintenance time, speeds up the replacement of equipment in case of failure, and ensures the efficiency of power grid operation.

[0014] The transmission assembly includes a drive bevel gear 11, which is fixedly mounted on the end of the drive rod 8 away from the handwheel 5. A second bearing 10 is rotatably mounted on the surface of the drive rod 8 near the end of the drive bevel gear 11. The bottom of the second bearing 10 is fixedly connected to the inner bottom of the mounting base 1. A driven bevel gear 12 is meshed on one side of the surface of the drive bevel gear 11. A shaft 13 is fixedly mounted in the middle of the driven bevel gear 12. Two bushings 14 are rotatably mounted on the surface of the shaft 13. The bottoms of the two bushings 14 are fixedly connected to the inner bottom of the mounting base 1.

[0015] Both ends of the shaft 13 are fixedly installed with threaded rods 15. Threaded sleeves 16 are threadedly connected to the surfaces of the two threaded rods 15. Connecting brackets 19 are fixedly installed at the ends of the two threaded sleeves 16 that are far apart from each other. Pins 20 are fixedly installed at the ends of the two connecting brackets 19 that are far apart from each other. Slider 17 is fixedly installed at the lower part of the threaded sleeves 16. Slide grooves 18 are opened on both sides of the bottom of the mounting base 1. The two sliders 17 are slidably installed inside the two slide grooves 18. Transmission strips 21 are sleeved on the surfaces of the pins 20. Pressure strips 22 are fixedly installed on the top of the two transmission strips 21. Rotating shafts 23 are fixedly installed at one end of the two pressure strips 22. Both ends of the two rotating shafts 23 are rotatably connected to the inner walls of both ends of the mounting base 1 through rotating seats 24. The lower parts of the two pressure strips 22 that are close to each other are fixedly connected to two positioning heads 7 respectively.

[0016] During installation, the operator rotates the handwheel 5 clockwise. When the handwheel 5 rotates, it drives the drive rod 8 to rotate inside the first bearing 9 and the second bearing 10. When the drive rod 8 rotates, it drives the driven bevel gear 12 to rotate through the active bevel gear 11. When the driven bevel gear 12 rotates, it drives the shaft 13 to rotate inside the two bushings 14. When the shaft 13 rotates, it drives the two threaded sleeves 16 to move in opposite directions through the two threaded rods 15. When the two threaded sleeves 16 move, they both drive the slider 17 to slide inside the slide groove 18, which increases the stability of the two threaded sleeves 16 when they move. When the two threaded sleeves 16 move in opposite directions, they drive the two pins 20 to move in opposite directions through the two connecting brackets 19. When the two pins 20 move in opposite directions, they drive the two pressure bars 22 to rotate in opposite directions along the two rotating shafts 23 through the two transmission bars 21, thereby driving the two positioning heads 7 to press into the two positioning grooves 6 to fix the insert plate 3, thus quickly completing the installation of the current transformer body 2. During disassembly, the operator rotates the handwheel 5 in the opposite direction. When the handwheel 5 rotates in the opposite direction, it drives the two threaded sleeves 16 to move towards each other through the two threaded rods 15. When the two threaded sleeves 16 move towards each other, they drive the two pins 20 to move towards each other through the connecting bracket 19. When the two pins 20 move towards each other, they drive the two pressure strips 22 to rotate upward, thereby driving the two positioning heads 7 to move out of the inside of the two positioning slots 6 and release the fixation on the plug plate 3, so that the disassembly of the current transformer body 2 can be completed quickly.

Claims

1. An interference-resistant electronic current transformer comprising a mounting base (1), characterized in that: The mounting base (1) is provided with a current transformer body (2) above it. The outer shell of the current transformer body (2) is made of copper to prevent electromagnetic interference. A plug plate (3) is fixedly installed at the bottom of the current transformer body (2). A socket (4) is opened at the top of the current transformer body (2). The plug plate (3) is inserted into the socket (4). A first shaft seat (9) is fixedly installed at the bottom of one side of the mounting base (1). A drive rod (8) is rotatably installed inside the first shaft seat (9). A handwheel (5) is fixedly installed at one end of the drive rod (8). Positioning grooves (6) are opened at both ends of the upper part of the plug plate (3). Positioning heads (7) are provided inside the two positioning grooves (6). The other end of the drive rod (8) extends into the interior of the mounting base (1) and is provided with a transmission component. The transmission component is connected to the two positioning heads (7). When the handwheel (5) drives the drive rod (8) to rotate, it will output power to the two positioning heads (7) so that the two positioning heads (7) can be pressed and limited or released.

2. The tamper-resistant electronic current transformer of claim 1, wherein: The transmission assembly includes a drive bevel gear (11), which is fixedly installed on the end of the drive rod (8) away from the handwheel (5). A second bearing seat (10) is rotatably installed on the surface of the drive rod (8) near the end of the drive bevel gear (11). The bottom of the second bearing seat (10) is fixedly connected to the inner bottom of the mounting base (1). A driven bevel gear (12) is meshed on one side of the surface of the drive bevel gear (11). A shaft (13) is fixedly installed in the middle of the driven bevel gear (12). Two bushings (14) are rotatably installed on the surface of the shaft (13). The bottom of both bushings (14) is fixedly connected to the inner bottom of the mounting base (1).

3. The tamper-resistant electronic current transformer of claim 2, wherein: Both ends of the shaft (13) are fixedly installed with threaded rods (15), and the surfaces of the two threaded rods (15) are threadedly connected with threaded sleeves (16). The ends of the two threaded sleeves (16) that are far apart from each other are fixedly installed with connecting brackets (19), and the ends of the two connecting brackets (19) that are far apart from each other are fixedly installed with pins (20). The lower part of the threaded sleeves (16) is fixedly installed with sliders (17). The bottom of the mounting base (1) is provided with sliding grooves (18) on both sides, and the two sliders (17) are slidably installed inside the two sliding grooves (18).

4. The tamper-resistant electronic current transformer of claim 3, wherein: The surface of each pin (20) is fitted with a transmission strip (21), and the top of each of the two transmission strips (21) is fixedly installed with a pressure strip (22). One end of each of the two pressure strips (22) is fixedly installed with a rotating shaft (23). Both ends of the two rotating shafts (23) are rotatably connected to the inner walls of both ends of the mounting base (1) through a rotating seat (24). The lower parts of the two pressure strips (22) that are close to each other are fixedly connected to two positioning heads (7) respectively.

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