High-voltage current transformer assembly

Abstract

The utility model relates to the field of current transformers, and discloses a high-voltage current transformer assembly which comprises a transformer body, a base fixedly connected with the bottom of the transformer body, and a connecting hole formed in the surface of the transformer body. The limiting seat is mounted on the outer side of the connecting hole, and the limiting seat comprises a positioning ring, a mounting groove, a U-shaped ring, a first movable groove and a second movable groove; and the conductive assembly is inserted in the connecting hole, and the conductive assembly comprises a connecting shaft, a baffle, a movable shaft, a telescopic sleeve, a supporting rod, a pressure spring and an invisible groove. The limiting seat is arranged on the outer side of the connecting hole, the electric wire and the conductive assembly are wound, so that the conductive assembly with the electric wire is inserted into the connecting hole, after the conductive assembly is inserted into the connecting hole, the baffle is clamped in the second movable groove through rotation, the U-shaped ring is rotated to secondarily intercept the telescopic sleeve, the overall operation is simple and rapid, and the practicability is high. No extra tool is needed for assistance, and the purpose of quick disassembly and assembly can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, and particularly relates to a high-voltage current transformer assembly. Background Technique

[0002] A current transformer is an instrument that converts a large current on the primary side into a small current on the secondary side based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current to be measured flows. Therefore, it often has the full current of the circuit flowing through it. The secondary winding has more turns and is connected in series in the measuring instrument and the protection circuit. When the current transformer is working, its secondary circuit is always closed. Therefore, the impedance of the series coil of the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to a short circuit.

[0003] When the current transformer is in operation, it is necessary to introduce current into the current transformer. At this time, a conductive component is required to introduce the current into the current transformer. The existing conductive component uses a method of winding a wire joint around a bolt and connecting the wire by tightening the bolt. During the process of tightening the bolt, a tool is needed to rotate the bolt, and the bolt needs to be rotated many times to press the wire, which cannot achieve the purpose of quickly fixing the wire. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a high-voltage current transformer assembly, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] The utility model discloses a high-voltage current transformer assembly, which includes a transformer body and a base fixedly connected to the bottom of the transformer body.

[0007] A connection hole is opened on the surface of the transformer body;

[0008] A limit seat is installed outside the connection hole. The limit seat includes a positioning ring fixed to the outer wall of the transformer body. A guide groove is opened at the top of the positioning ring. An installation groove is opened inside the positioning ring. A U-shaped ring is installed inside the installation groove. A first movable groove is opened on the outer wall of one side of the installation groove. A regulating plate is fixed to the outer wall of the U-shaped ring corresponding to the position of the first movable groove. A second movable groove is opened on the side of the positioning ring away from the first movable groove.

[0009] The conductive component is inserted inside the connection hole. The connection hole includes a connection shaft that is fixedly connected to the nut. A group of baffles are fixed on the outer wall of the connection shaft. One end of the connection shaft away from the nut is fixed with a movable shaft. Telescopic sleeves are fixed on both sides of the movable shaft. One end of the telescopic sleeve away from the movable shaft is fixed with a support rod. A compression spring is sleeved on the outer surface of the telescopic sleeve. A hidden groove is provided on the surface of the connection shaft corresponding to the position of the support rod.

[0010] Furthermore, two symmetrical dovetail connection blocks are fixed at the bottom of the base.

[0011] Furthermore, an installation plate is provided below the base.

[0012] Furthermore, positioning grooves that can be inserted into the dovetail connection blocks are provided on the surface of the installation plate.

[0013] Furthermore, positioning holes are provided at the bottom of the positioning groove and on the surface of the dovetail connection block.

[0014] Furthermore, positioning rods are inserted into the positioning holes.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] 1. The present utility model provides a limit seat outside the connection hole. By winding the wire with the conductive component, the conductive component is inserted into the connection hole with the wire. After the conductive component is inserted into the connection hole, the baffle is rotated and stuck in the second movable groove by rotation, and the U-shaped ring is rotated to perform secondary interception on the telescopic sleeve. The overall operation is simple and fast, without the need for additional tools for assistance, and the purpose of quick disassembly and assembly can be achieved.

[0017] 2. The present utility model installs a movable shaft at the bottom of the connection shaft, and connects the support rod through the telescopic sleeve on both sides of the movable shaft. By changing the length of the telescopic sleeve, the distance between the support rod and the connection shaft is changed, so that when installing wires of different thicknesses, the contact between the wire and the inner wall of the connection hole can be ensured, and the smooth flow of current can be realized. Description of the Drawings

[0018] Figure 1 is the three-dimensional structure diagram of the present utility model;

[0019] Figure 2 is the partially disassembled three-dimensional diagram of the present utility model;

[0020] Figure 3 is the disassembled three-dimensional diagram of the limit seat in the present utility model;

[0021] Figure 4 is the three-dimensional structure diagram of the conductive component in the present utility model;

[0022] The reference numerals in the figure respectively represent: 1. Transformer body; 2. Base; 3. Connecting hole; 4. Limiting seat; 5. Conductive component; 6. Dovetail connecting block; 7. Mounting plate; 8. Positioning groove; 9. Positioning rod; 41. Positioning ring; 42. Mounting groove; 43. U-shaped ring; 44. First movable groove; 45. Second movable groove; 51. Connecting shaft; 52. Baffle; 53. Movable shaft; 54. Telescopic sleeve; 55. Support rod; 56. Compression spring; 57. Hidden groove. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-4 , including a transformer body 1 and a base 2 fixedly connected to the bottom of the transformer body 1, and a connecting hole 3 opened on the surface of the transformer body 1;

[0025] A limiting seat 4 is installed outside the connecting hole 3. The limiting seat 4 includes a positioning ring 41 fixed to the outer wall of the transformer body 1. A guiding groove is opened at the top of the positioning ring 41. A mounting groove 42 is opened inside the positioning ring 41 and is located on the side of the positioning ring 41 away from the transformer body 1. A U-shaped ring 43 is installed inside the mounting groove 42, and the notch of the U-shaped ring 43 and the guiding groove of the positioning ring 41 can overlap with each other through rotation. A first movable groove 44 is opened on the outer wall of one side of the mounting groove 42 and is communicated with the mounting groove 42. A regulating plate is fixed to the outer wall of the U-shaped ring 43 corresponding to the position of the first movable groove 44. By sliding the regulating plate in the first movable groove 44, the U-shaped ring 43 can be rotated, so as to control the overlap of the U-shaped ring 43 and the positioning ring 41. A second movable groove 45 is opened on the side of the positioning ring 41 away from the first movable groove 44, and the other side of the second movable groove 45 is directly attached to the outer wall of the transformer body 1;

[0026] The conductive component 5 is inserted into the connection hole 3. The connection hole 3 includes a connection shaft 51 connected and fixed with a nut. The connection shaft 51 can be plugged into the connection hole 3 through the limit seat 4. The connection terminal of the wire is wrapped around the outer surface of the connection shaft 51, and then the connection shaft 51 is inserted into the connection hole 3, so that the current can be connected to the transformer body 1. A group of baffles 52 are fixed on the outer wall of the connection shaft 51. When the connection shaft 51 and the connection hole 3 are assembled, the U-shaped ring 43 is rotated so that the notch position overlaps with the guide groove of the positioning ring 41, and the baffles are fixed to the outer wall of the connection shaft 51. The plate 52 is pushed toward the transformer body 1 in correspondence with the guide groove, so that the baffle 52 approaches the transformer body 1. When the baffle 52 touches the outer wall of the transformer body 1, the baffle 52 is rotated toward the inside of the movable groove 2 45, and the side wall of the movable groove 2 45 is engaged with the baffle 52 to limit the conductive component 5. Then, the U-shaped ring 43 is moved through the adjusting rod to make the notch of the U-shaped ring 43 staggered with the guide groove of the positioning ring 41, thereby performing a secondary interception on the baffle 52 to reduce the possibility of the conductive component 5 automatically detaching from the inside of the connection hole 3. The disassembly and assembly operation is simple and quick, and the fixing of the wires can be completed quickly. A movable shaft 53 is fixed to the end of the connecting shaft 51 away from the nut, and telescopic sleeves 54 are fixed on both sides of the movable shaft 53. A support rod 55 is fixed to the end of the telescopic sleeve 54 away from the movable shaft 53. A compression spring 56 is sleeved on the outer surface of the telescopic sleeve 54. The compression spring 56 can automatically lengthen the length of the telescopic sleeve 54, thereby expanding the circumference of the combination of the support rod 55 and the connecting shaft 51. An invisible groove 57 is opened on the surface of the connecting shaft 51 corresponding to the position of the support rod 55. The connecting hole 3 is of a fixed size. When the thickness of the wire is small, the compression spring 56 pushes the telescopic sleeve 54 to expand the support rod 55 to both sides. When the wire is wound, the wire is wound from the outside of the support rod 55, so that after the wire is inserted into the connecting hole 3, it is supported by the support rod 55, so that the wire can contact the inner wall of the connecting hole 3, so that the wire can be connected to the current. When the size of the wire is thicker, the support rod 55 is retracted inward so that the size of the wire after being wound with the connecting shaft 51 can be normally inserted into the connecting hole 3.

[0027] Two sets of symmetrical dovetail connection blocks 6 are fixed to the bottom of the base 2. A mounting plate 7 is arranged below the base 2. A positioning groove 8 is provided on the surface of the mounting plate 7, which can be plugged into the dovetail connection block 6. The dovetail connection block 6 is slid from one end of the positioning groove 8 into the inside of the positioning groove 8, so that the dovetail connection block 6 and the base 2 are restricted from moving up and down. Positioning holes are provided at the bottom of the positioning groove 8 and on the surface of the dovetail connection block 6. A positioning rod 9 is inserted into the inside of the positioning hole, and the dovetail connection block 6 is connected and positioned with the mounting plate 7 through the positioning rod 9 to prevent the dovetail connection block 6 from sliding along the positioning groove 8 when vibration occurs, thereby ensuring the stability of the installation of the transformer body 1, and the structure is simple, and the disassembly and assembly operations can be completed quickly.

[0028] Working principle: Fix the mounting plate 7 at the position where the current transformer body 1 needs to be installed. Then, insert the current transformer body 1 into the mounting plate 7 through the dovetail connection block 6. Next, connect the positioning holes of the positioning groove 8 and the dovetail connection block 6 in series through the positioning rod 9 to fix the current transformer body 1. When connecting the wire to the current transformer body 1, pull out the conductive component 5 from the inside of the connection hole 3, determine the model and thickness of the wire, wind the connection end of the wire around the outer sides of the connection shaft 51 and the support rod 55. After inserting the wire into the connection hole 3 along with the connection shaft 51, the support rod 55 supports the inner ring of the wire, so that the outer wall of the wire can be in contact with the inner wall of the connection hole 3. After inserting the connection shaft 51 into the connection hole 3, align the baffle 52 with the guiding groove of the positioning ring 41, so that the connection shaft 51 can be pushed towards the current transformer body 1. When the baffle 52 touches the outer wall of the current transformer body 1, rotate the support rod 55 to make the baffle 52 stuck in the second movable groove 45 to prevent the conductive component 5 from detaching from the inside of the connection hole 3. Then, rotate the U-shaped ring 43 along the first movable groove 44 through the adjusting rod, so that the notch of the U-shaped ring 43 is misaligned with the guiding groove of the positioning ring 41 to intercept the baffle 52 for the second time, further ensuring that the conductive component 5 is inserted into the connection hole 3. When taking out and replacing the wire, reverse the operation to pull out the conductive component 5 from the inside of the connection hole 3.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage current transformer assembly, comprising a transformer body (1) and a base (2) connected and fixed to the bottom of the transformer body (1), It is characterized in that Also included are: A connection hole (3) is provided on the surface of the transformer body (1); A limit seat (4) is installed on the outer side of the connecting hole (3), the limit seat (4) includes a positioning ring (41) fixed to the outer wall of the transformer body (1), a guide groove is provided on the top of the positioning ring (41), a mounting groove (42) is provided inside the positioning ring (41), a U-shaped ring (43) is installed inside the mounting groove (42), a movable groove 1 (44) is provided on the outer wall of one side of the mounting groove (42), an adjustment plate is fixed on the outer wall of the U-shaped ring (43) at a position corresponding to the movable groove 1 (44), and a movable groove 2 (45) is provided on a side of the positioning ring (41) away from the movable groove 1 (44); The conductive component (5) is inserted into the connection hole (3). The connection hole (3) includes a connection shaft (51) connected and fixed to a nut. A group of baffles (52) are fixed to the outer wall of the connection shaft (51). A movable shaft (53) is fixed to one end of the connection shaft (51) away from the nut. Telescopic sleeves (54) are fixed on both sides of the movable shaft (53). A support rod (55) is fixed to one end of the telescopic sleeve (54) away from the movable shaft (53). A compression spring (56) is sleeved on the outer surface of the telescopic sleeve (54). An invisible groove (57) is provided on the surface of the connection shaft (51) at a position corresponding to the support rod (55).

2. The high voltage current transformer assembly according to claim 1, characterized in that: Two groups of symmetrical dovetail connection blocks (6) are fixed to the bottom of the base (2).

3. The high voltage current transformer assembly according to claim 1, characterized in that: A mounting plate (7) is arranged below the base (2).

4. The high voltage current transformer assembly according to claim 1, characterized in that: The surface of the mounting plate (7) is provided with a positioning groove (8) which can be plugged into the dovetail connection block (6).

5. The high voltage current transformer assembly according to claim 1, characterized in that: Positioning holes are provided at the bottom of the positioning groove (8) and on the surface of the dovetail connection block (6).

6. The high voltage current transformer assembly according to claim 5, characterized in that: A positioning rod (9) is inserted into the positioning hole.

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