A resin-encased insulation current transformer

Abstract

The utility model discloses a resin pouring insulation current transformer, it includes fuselage and stop gear, the current transformer is installed in the fuselage, stop gear includes two installation cylinders fixedly installed in the current transformer, two installation cylinders are opposite and set up, install the round block in installation cylinder, and the first spring is fixedly installed with the current transformer on the round block, and the mounting frame is fixedly installed on the round block, and the connecting column that slides and abuts with the inner wall of mounting frame is slidably connected in mounting frame, and the connecting column, mounting frame are installed with the stop piece that makes connecting column and mounting frame stable connection, and the connecting column is fixedly installed with the limiting plate, and the limiting plate is equipped with the through slot, and two through slots are opposite and set up, this current transformer utilizes the cooperation between stop piece, limiting plate, gear, synchronous belt and fan, has improved the replacement efficiency of limiting plate, has improved the heat dissipation efficiency of current transformer simultaneously.

Description

Technical Field

[0001] This utility model belongs to the technical field of current transformers, specifically a resin-cast insulated current transformer. Background Technology

[0002] In high-frequency scenarios of new energy inverters, current transformers play a crucial role in electrical measurement and system protection. They can accurately acquire high-frequency current signals, convert large currents into easily processed small current signals, and provide real-time current data for the inverter's control algorithm. This ensures that the inverter can accurately regulate parameters such as grid-connected current and output power. Furthermore, under high-frequency operating conditions, current transformers can quickly detect abnormal current states such as overcurrent and short circuits, and work with protection circuits to trigger protection actions in a timely manner, preventing power devices from being damaged due to abnormal currents and ensuring the safe and stable operation of the inverter system.

[0003] The side conductor is usually fixed to the transformer body by multiple layers of limiting members. These limiting members often rely on a large number of screws for fastening. When it is necessary to replace the side conductor of different specifications, many screws must be removed one by one before the original limiting members can be removed. This process not only consumes a lot of time and effort, but may also cause thread wear due to frequent screw removal, affecting the tightness and stability of subsequent installation. This complex disassembly process makes the replacement of side conductor specifications difficult and inefficient, which in turn makes it inconvenient to install side conductors of different specifications on the current transformer. In the high-frequency scenario of new energy inverters, the internal loss of the current transformer is aggravated and the heat generation is significantly increased, but there is a lack of efficient heat dissipation mechanism. Relying solely on the surface of the current transformer to exchange heat with the air will cause heat to accumulate inside, resulting in poor heat dissipation and potentially affecting its measurement accuracy and service life. To address this, this application proposes a resin-cast insulated current transformer. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a resin-cast insulated current transformer, which effectively solves the problems of inconvenience in installing side conductors of different specifications and poor heat dissipation on the current transformer.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a resin-cast insulated current transformer, comprising a body and a limiting mechanism, wherein a current transformer is installed inside the body; the limiting mechanism includes two mounting cylinders fixedly installed inside the current transformer, the two mounting cylinders being arranged vertically opposite each other, a circular block being installed inside the mounting cylinder, a first spring being fixedly installed on the circular block and the current transformer, a mounting frame being fixedly installed on the circular block, a connecting column being slidably connected inside the mounting frame and slidingly abutting against the inner wall of the mounting frame, limiting components being installed on the connecting column and the mounting frame to stably connect the connecting column and the mounting frame, a limiting plate being fixedly installed on the connecting column, and a through groove being provided on the limiting plate, the two through grooves being arranged vertically opposite each other.

[0006] Preferably, multiple fixing columns are fixedly installed on the machine body, and the multiple fixing columns are fixedly connected to the current transformer.

[0007] Preferably, a circular ring is fixedly installed inside the mounting cylinder, which slides against the circular block, and a limiting ring is fixedly installed on the circular block, which slides against the circular ring.

[0008] Preferably, the limiting member includes a sliding groove provided on the connecting column, a limiting bolt slidably connected in the sliding groove and slidingly abutting against the inner wall of the sliding groove, the limiting bolt passing through the mounting frame and slidably connected thereto, and a second spring fixedly installed on the limiting bolt and the mounting frame.

[0009] Preferably, the current transformer is fixedly mounted with multiple heat dissipation fins, and multiple mounting posts that penetrate the heat dissipation fins are fixedly mounted on the current transformer, with a motor fixedly mounted on the mounting posts.

[0010] Preferably, a rotating rod is fixedly installed at the output end of the motor, and a fixed frame through which the heat dissipation fins are set is fixedly installed on both sides of the current transformer. The two fixed frames are arranged opposite to each other, and a connecting plate is fixedly installed on the fixed frame. A transmission rod is rotatably connected to the connecting plate, and a fan is fixedly connected to the transmission rod. The fan is arranged opposite to the heat dissipation fins.

[0011] Preferably, gears are fitted onto the transmission rod and the rotating rod and are fixedly connected to the transmission rod and the rotating rod, and a synchronous belt is wound around the multiple gears and meshes with them. A support member that can stabilize the synchronous belt is fixedly installed on the current transformer.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a limiting mechanism, and utilizing the cooperation between the limiting plate, the limiting component, and the first spring, pulling the limiting bolt can pull the limiting bolt out of the slide groove, so the connecting column is no longer limited, the limiting plate is no longer limited, and the limiting plate can be quickly disassembled, avoiding the need to disassemble a large number of screws, improving the replacement efficiency of the limiting plate, and reducing the waste of pulling force. At the same time, by utilizing the cooperation between the motor, gears, synchronous belt, and fan, the output end of the motor will drive the rotating rod to rotate, and the rotating rod can drive the transmission rod to rotate through the transmission of gears and synchronous belt, thereby driving the fan to rotate. In addition, the heat dissipation fins increase the contact area between the current transformer and the air, and the rapid airflow can improve the heat dissipation efficiency of the current transformer, avoiding the current transformer from overheating and affecting its operation. Attached Figure Description

[0013] 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.

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the structure of the resin-cast insulated current transformer of this utility model;

[0016] Figure 2 This is a cross-sectional view of the resin-cast insulated current transformer of this utility model;

[0017] Figure 3 This is a side sectional view of the resin-cast insulated current transformer of this utility model;

[0018] Figure 4 This utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 5 This utility model Figure 3 Enlarged view of point B in the middle;

[0020] Figure 6 This utility model Figure 2 Enlarged view of point C in the middle;

[0021] In the diagram: 1. Body; 2. Current transformer; 3. Heat sink fins; 4. Motor; 5. Mounting cylinder; 6. Circular block; 7. Fixing post; 8. Fixing frame; 9. Fan; 10. Rotating rod; 11. Synchronous belt; 12. Mounting post; 13. Through slot; 14. Limiting plate; 15. Connecting post; 16. Slide groove; 17. Limiting bolt; 18. Second spring; 19. Mounting frame; 20. Circular ring; 21. Limiting ring; 22. First spring; 23. Connecting plate; 24. Gear; 25. Transmission rod; 26. Support component. Detailed Implementation

[0022] 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.

[0023] Depend on Figures 1-6The present invention includes a body 1 and a limiting mechanism. A current transformer 2 is installed inside the body 1. The current transformer 2 is vacuum cast with epoxy resin (with added flame retardant and curing agent). Multiple fixing posts 7 are fixedly installed on the body 1 and are fixedly connected to the current transformer 2. The limiting mechanism includes two mounting cylinders 5 fixedly installed inside the current transformer 2. The two mounting cylinders 5 are arranged vertically opposite each other. A circular block 6 is installed inside the mounting cylinder 5. A circular ring 20 that slides against the circular block 6 is fixedly installed inside the mounting cylinder 5. A limiting ring 21 that abuts against the circular ring 20 is fixedly installed on the circular block 6. The limiting ring 21 slides against the inner wall of the mounting cylinder 5. The limiting ring 21 abuts against the circular ring 20 to prevent the circular block 6 from falling out of the mounting cylinder 5.

[0024] A first spring 22 is fixedly installed on the circular block 6 and the current transformer 2. A mounting frame 19 is fixedly installed on the circular block 6. A connecting post 15 is slidably connected inside the mounting frame 19 and slides against the inner wall of the mounting frame 19. Limiting components that make the connecting post 15 and the mounting frame 19 stably connected are installed on the connecting post 15 and the mounting frame 19. The limiting component includes a sliding groove 16 provided on the connecting post 15. A limiting bolt 17 that slides against the inner wall of the sliding groove 16 is slidably connected inside the sliding groove 16. The limiting bolt 17 passes through the mounting frame 19 and is slidably connected to it. A second spring 18 is fixedly installed on the limiting bolt 17 and the mounting frame 19. A limiting plate 14 is fixedly installed on the connecting post 15. The limiting plate 14 is provided with a through groove 13. The two through grooves 13 are arranged vertically opposite each other.

[0025] During operation, pushing the upper limiting plate 14 causes it to move. The movement of the limiting plate 14 causes the connecting column 15 to move, which in turn causes the limiting bolt 17 to move. The limiting bolt 17 causes the mounting frame 19 to move, which in turn causes the round block 6 to move. The movement of the round block 6 compresses the first spring 22, positioning the side conductor opposite to the lower through groove 13. Pulling the side conductor through the through groove 13 causes it to slide against the inner wall of the through groove 13. Releasing the limiting plate 14 causes the first spring 22 to move the round block 6, which in turn causes the mounting frame 19 to move. The mounting frame 19 causes the limiting bolt 17 to move, which in turn causes the connecting column 15 to move. The connecting column 15 then causes the limiting plate 14 to move, which in turn causes the upper through groove 13 to move and abut against the side conductor, thus limiting the side conductor and completing its installation while ensuring its stability.

[0026] When different specifications of side conductors need to be installed, pulling the limit bolt 17 can move the limit bolt 17 out of the slide groove 16, the second spring 18 is stretched, the connecting post 15 is no longer limited, the limit plate 14 is no longer limited, so the limit plate 14 can be removed, the limit plate 14 that meets the specifications is placed under the mounting frame 19, the connecting post 15 is set opposite to the mounting frame 19, the connecting post 15 is pushed, the connecting post 15 moves and slides against the inner wall of the mounting frame 19. When the connecting post 15 abuts against the bottom of the mounting frame 19, the limit bolt 17 is just set opposite to the slide groove 16. Releasing the limit bolt 17, the second spring 18 will drive the limit bolt 17 to move, the limit bolt 17 moves and slides against the inner wall of the slide groove 16, so that the connecting post 15 is limited, and the installation of the limit plate 14 is completed. This avoids disassembling a large number of screws and improves the disassembly and assembly efficiency of the limit plate 14.

[0027] Multiple heat sink fins 3 are fixedly mounted on the current transformer 2. Multiple mounting posts 12, penetrating the heat sink fins 3, are also fixedly mounted on the current transformer 2. A motor 4 is fixedly mounted on each mounting post 12. A rotating rod 10 is fixedly mounted at the output end of the motor 4. Fixed frames 8, penetrating the heat sink fins 3, are fixedly mounted on both sides of the current transformer 2. The two fixed frames 8 are positioned opposite each other. A connecting plate 23 is fixedly mounted on the fixed frame 8. A transmission rod 25 is rotatably connected to the connecting plate 23. A fan 9, fixedly connected to the transmission rod 25, is sleeved on the transmission rod 25. The fan 9 is positioned opposite the heat sink fins 3. 5. Gears 24 are fitted on the rotating rod 10 and fixedly connected to the transmission rod 25 and the rotating rod 10. A synchronous belt 11 meshes with the gears 24. A support member 26 is fixedly installed on the current transformer 2 to stabilize the synchronous belt 11. The support member 26 includes a support plate fixedly installed on both sides of the current transformer 2. A support column is fixedly installed on the support plate to slide against the inner wall of the synchronous belt 11. A cylinder is fixedly installed on the support plate to slide against the bottom of the synchronous belt 11. The support column and the cylinder cooperate to prevent the synchronous belt 11 from falling and affecting the transmission of the gears 24.

[0028] During operation, when motor 4 is turned on, its output will drive rotating rod 10 to rotate. Rotating rod 10 will drive gear 24, which is fixedly connected to it, to rotate. Gear 24 will drive synchronous belt 11, which is meshed with it, to move. Synchronous belt 11 will drive the other two gears 24 to rotate. Gear 24 will drive transmission rod 25 to rotate. Transmission rod 25 will drive fan 9, which is fixedly connected to it, to rotate. The rotation of fan 9 will cause the surrounding air to flow rapidly. The heat dissipation fins 3 increase the contact area between current transformer 2 and air. Combined with the rapid air flow, this can improve the heat dissipation efficiency of current transformer 2 and prevent overheating of current transformer 2 from affecting its operation.

[0029] Working principle: During operation, pushing the upper limiting plate 14 can move the limiting plate 14, which in turn moves the connecting column 15, which in turn moves the limiting bolt 17, which in turn moves the mounting frame 19, which in turn moves the round block 6, which in turn compresses the first spring 22, aligning the side conductor with the lower through groove 13. Pulling the side conductor through the through groove 13 causes it to slide against the inner wall of the through groove 13. Releasing the limiting plate 14 causes the first spring 22 to move the round block 6, which in turn moves the mounting frame 19, which in turn moves the limiting bolt 17, which in turn moves the connecting column 15, which in turn moves the limiting plate 14, which in turn moves the upper through groove 13 to abut against the side conductor, thus limiting the side conductor and completing its installation while ensuring its stability.

[0030] When different specifications of side conductors need to be installed, pulling the limit bolt 17 can move the limit bolt 17 out of the slide groove 16, the second spring 18 is stretched, the connecting post 15 is no longer limited, the limit plate 14 is no longer limited, so the limit plate 14 can be removed, the limit plate 14 that meets the specifications is placed under the mounting frame 19, the connecting post 15 is set opposite to the mounting frame 19, the connecting post 15 is pushed, the connecting post 15 moves and slides against the inner wall of the mounting frame 19. When the connecting post 15 abuts against the bottom of the mounting frame 19, the limit bolt 17 is just set opposite to the slide groove 16. Releasing the limit bolt 17, the second spring 18 will drive the limit bolt 17 to move, the limit bolt 17 moves and slides against the inner wall of the slide groove 16, so that the connecting post 15 is limited, and the installation of the limit plate 14 is completed. This avoids disassembling a large number of screws and improves the disassembly and assembly efficiency of the limit plate 14.

[0031] When motor 4 is turned on, its output will drive the rotating rod 10 to rotate. The rotating rod 10 will drive the gear 24 fixedly connected to it to rotate. The gear 24 will drive the synchronous belt 11 meshing with it to move. The synchronous belt 11 will drive the other two gears 24 to rotate. The gear 24 will drive the transmission rod 25 to rotate. The transmission rod 25 will drive the fan 9 fixedly connected to it to rotate. The rotation of the fan 9 will cause the surrounding air to flow rapidly. The heat dissipation fins 3 increase the contact area between the current transformer 2 and the air. Combined with the rapid air flow, this can improve the heat dissipation efficiency of the current transformer 2 and prevent the current transformer 2 from overheating and affecting its operation.

Claims

1. A resin-cast insulated current transformer, comprising a body (1) and a limiting mechanism, characterized in that: The body (1) is equipped with a current transformer (2); the limiting mechanism includes two mounting cylinders (5) fixedly installed in the current transformer (2), the two mounting cylinders (5) are arranged opposite each other, a round block (6) is installed in the mounting cylinder (5), a first spring (22) is fixedly installed on the round block (6) and the current transformer (2), a mounting frame (19) is fixedly installed on the round block (6), a connecting column (15) is slidably connected in the mounting frame (19) and slides against the inner wall of the mounting frame (19), a limiting member is installed on the connecting column (15) and the mounting frame (19) to stably connect the connecting column (15) and the mounting frame (19), a limiting plate (14) is fixedly installed on the connecting column (15), a through groove (13) is provided on the limiting plate (14), and two through grooves (13) are arranged opposite each other.

2. The resin-cast insulated current transformer according to claim 1, characterized in that: Multiple fixed columns (7) are fixedly installed on the body (1), and the multiple fixed columns (7) are fixedly connected to the current transformer (2).

3. The resin-cast insulated current transformer according to claim 1, characterized in that: The mounting cylinder (5) is fixedly installed with a circular ring (20) that slides against the circular block (6). The circular block (6) is fixedly installed with a limiting ring (21) that slides against the circular ring (20). The limiting ring (21) slides against the inner wall of the mounting cylinder (5).

4. A resin-cast insulated current transformer according to claim 1, characterized in that: The limiting component includes a sliding groove (16) provided on the connecting column (15), a limiting bolt (17) that slides and abuts against the inner wall of the sliding groove (16) is slidably connected in the sliding groove (16), the limiting bolt (17) passes through the mounting frame (19) and is slidably connected to it, and a second spring (18) is fixedly installed on the limiting bolt (17) and the mounting frame (19).

5. A resin-cast insulated current transformer according to claim 1, characterized in that: The current transformer (2) is fixedly mounted with multiple heat dissipation fins (3), and multiple mounting posts (12) that penetrate the heat dissipation fins (3) are fixedly mounted on the current transformer (2). A motor (4) is fixedly mounted on the mounting posts (12).

6. A resin-cast insulated current transformer according to claim 5, characterized in that: A rotating rod (10) is fixedly installed at the output end of the motor (4). Fixed frames (8) that pass through the heat dissipation fins (3) are fixedly installed on both sides of the current transformer (2). The two fixed frames (8) are arranged opposite to each other. A connecting plate (23) is fixedly installed on the fixed frame (8). A transmission rod (25) is rotatably connected to the connecting plate (23). A fan (9) is fixedly connected to the transmission rod (25). The fan (9) is arranged opposite to the heat dissipation fins (3).

7. A resin-cast insulated current transformer according to claim 6, characterized in that: The transmission rod (25) and the rotating rod (10) are each fitted with gears (24) that are fixedly connected to the transmission rod (25) and the rotating rod (10). A synchronous belt (11) is wound around the multiple gears (24) and meshed with them. A support member (26) that can stabilize the synchronous belt (11) is fixedly installed on the current transformer (2).

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