Wall bushing of current transformer

Abstract

The utility model discloses a current transformer wall bushing, and particularly relates to the technical field of current transformers, the current transformer wall bushing comprises a bottom shell, one side of the bottom shell is provided with a top shell, the other side of the bottom shell is fixedly connected with a connecting screw tube, and the middle part of the connecting screw tube is sleeved with a first extrusion plate and a hexagon nut; the opposite sides of the connecting screw tube and the top shell are fixedly connected with rubber tubes, and the middles of the rubber tubes are fixedly sleeved with umbrella skirts. The first extrusion plate and the hexagon nut are rotated to move from the top of the connecting screw pipe to one side of the bottom shell, the wall is extruded through cooperation with the bottom shell, the bottom shell and the connecting screw pipe are installed and fixed, the wall cannot be damaged, the bottom shell is prevented from rotating while the fixing strength is improved through the anti-slip strips, and the service life of the bottom shell is prolonged. And by arranging the top shell and the bottom shell which are combined and fixed through rivets, when internal parts are damaged, independent disassembly and replacement are facilitated, and maintenance and use are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and more specifically, to a through-wall bushing for a current transformer. Background Technology

[0002] In the construction and operation of power systems, it is often necessary to connect power lines from one room or area through the wall to another room or area. At the same time, it is necessary to accurately measure and monitor the current in the line. Therefore, a type of wall bushing with an attached current transformer has emerged.

[0003] Most existing current transformer wall bushings are integral structures that cannot be disassembled. When the internal windings fail, the entire unit must be replaced, and individual internal parts cannot be replaced as needed. Furthermore, most existing current transformer wall bushings are fixed to the wall with bolts, which can damage the wall. Therefore, a new type of current transformer wall bushing is proposed. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a current transformer through-wall bushing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a current transformer wall bushing, including a bottom shell, a top shell on one side of the bottom shell, which facilitates assembly and fixation through the cooperation of the bottom shell and the top shell, and a connecting screw tube fixedly connected to the other side, which facilitates penetration through the wall, allowing the wire to pass through the middle of the connecting screw tube, the bottom shell, and the top shell. A first extrusion plate and a hexagonal nut are fitted in the middle of the connecting screw tube. Rotating the first extrusion plate and the hexagonal nut moves them to one side of the bottom shell, and the cooperation with the bottom shell compresses the wall, facilitating installation and fixation. Rubber tubes are fixedly connected to opposite sides of the connecting screw tube and the top shell, and a skirt is fixedly fitted in the middle of the rubber tube. The rubber tube and the skirt can bend and guide the penetrating wire, avoiding damage caused by vertical bending of the wire.

[0006] A positioning ring and a connecting ring are fixedly connected to the middle of opposite sides of the bottom shell and the top shell, respectively. An iron core is sleeved in the middle of the positioning ring and the connecting ring. Two windings are wound around the surface of the iron core. The positioning ring and the connecting ring limit the installation of the iron core. The cooperation between the windings and the iron core facilitates the sensing and detection of the current of the wire passing through the middle.

[0007] Two fixing plates are fixedly connected to the top of the top shell. A pressing screw is inserted into the middle of the fixing plate. A second pressing plate is fixedly connected to one end of the pressing screw. A connecting plate is fixedly connected to the top of the bottom shell. An anti-slip strip is fixedly connected to the side of the bottom shell near the connecting screw tube. By rotating the pressing screw, the second pressing plate is moved to the side of the connecting plate, which can facilitate the electrical connection of external wires to the two connecting plates, making power connection convenient. The anti-slip strip improves the fixing strength of the bottom shell, prevents the bottom shell from rotating after fixing, and improves the anti-slip effect.

[0008] Preferably, the hexagonal nut is fixed to the side of the first extrusion plate away from the bottom shell. The first extrusion plate and the hexagonal nut are threadedly connected to the outer surface of the connecting screw tube. The hexagonal nut facilitates the rotation of the first extrusion plate, thereby facilitating the extrusion of the wall by the first extrusion plate, increasing the extrusion area and strength, and facilitating installation and fixation.

[0009] Preferably, the bottom shell has through holes around its perimeter, and a rivet is inserted into the center of each through hole. The top shell has a threaded hole on one side, and one end of the rivet extends into the threaded hole and is threadedly connected to it. By inserting the rivet through the through hole into the threaded hole, it is convenient to assemble and fix the top shell and the bottom shell together, which facilitates assembly, disassembly, and maintenance.

[0010] Preferably, one end of the connecting ring has an internal groove, and one end of the positioning ring is fixedly connected to a convex ring. The convex ring is adapted to the groove and is located inside the groove. Through the cooperation of the convex ring and the groove, the docking stability of the positioning ring and the connecting ring is improved, and the stability of the iron core is enhanced.

[0011] Preferably, one end of one winding is electrically connected to two connecting plates respectively, the fixing plate and the connecting plate correspond one-to-one, the extrusion screw is threadedly connected to the fixing plate, and a positioning rod is fixedly connected to one side of the second extrusion plate to facilitate current detection through the winding. The second extrusion plate extrudes one end of the wire and limits it with the positioning rod, thereby improving the connection strength of the wire.

[0012] Preferably, a positioning block is fixedly connected to the side of the top shell near the bottom shell, and a positioning slot is provided on the side of the bottom shell near the top shell. The positioning block is set inside the positioning slot. The combination of the positioning block and the positioning slot improves the assembly efficiency of the top shell and the bottom shell and facilitates positioning, installation and use.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model first moves the first extrusion plate and hexagonal nut from the top of the connecting screw tube to one side of the bottom shell by rotating the first extrusion plate and hexagonal nut. It then extrudes the wall by cooperating with the bottom shell, thereby fixing the bottom shell and the connecting screw tube without damaging the wall. The anti-slip strip improves the fixing strength while preventing the bottom shell from rotating and affecting the use effect. The top shell and bottom shell are fixed by rivets, which makes it easy to disassemble and replace the internal parts when they are damaged, and facilitates maintenance.

[0015] 2. This utility model also uses rubber tubes and umbrella skirts to guide the bending of the through wires, preventing damage caused by vertical bending. The positioning ring and connecting ring limit the installation of the iron core. The cooperation between the winding and the iron core facilitates the sensing and detection of the current of the wire passing through the middle. The cooperation between the convex ring and the ring groove improves the docking stability of the positioning ring and the connecting ring, thus improving the stability of the iron core. The cooperation between the positioning block and the positioning slot improves the combination efficiency of the top shell and the bottom shell, and facilitates positioning, installation and use.

[0016] In summary, through the interaction of the above-mentioned multiple functions, the device can be easily installed and fixed without damaging the wall. At the same time, when internal parts are damaged, they can be easily disassembled and replaced individually, making maintenance and use convenient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the disassembled structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the top shell of this utility model.

[0021] Figure 5 This is a schematic diagram of the bottom shell of this utility model.

[0022] The attached diagram is labeled as follows: 1. Bottom shell; 2. Top shell; 3. Connecting screw tube; 4. Rubber tube; 5. Umbrella skirt; 6. First extrusion plate; 7. Hexagonal nut; 8. Iron core; 9. Winding; 10. Positioning ring; 11. Connecting ring; 12. Through hole; 13. Threaded hole; 14. Rivet; 15. Connecting plate; 16. Fixing plate; 17. Extrusion screw; 18. Second extrusion plate; 19. Anti-slip strip. Detailed Implementation

[0023] 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.

[0024] As attached Figure 1-5 The current transformer wall bushing shown includes a bottom shell 1, a top shell 2 on one side of the bottom shell 1, and a connecting screw tube 3 fixedly connected to the other side. The connecting screw tube 3 facilitates the penetration of the wall, allowing the wire to pass through the middle of the connecting screw tube 3, the bottom shell 1, and the top shell 2. A first compression plate 6 and a hexagonal nut 7 are fitted in the middle of the connecting screw tube 3. Rotating the first compression plate 6 and the hexagonal nut 7 moves them to one side of the bottom shell 1, and the compression of the wall by the cooperation with the bottom shell 1 facilitates installation and fixation. Rubber tubes 4 are fixedly connected to opposite sides of the connecting screw tube 3 and the top shell 2. A skirt 5 is fixedly fitted in the middle of the rubber tube 4. The rubber tube 4 and the skirt 5 can bend and guide the penetrating wire to avoid damage caused by vertical bending of the wire.

[0025] A positioning ring 10 and a connecting ring 11 are fixedly connected to the middle of opposite sides of the bottom shell 1 and the top shell 2, respectively. An iron core 8 is sleeved in the middle of the positioning ring 10 and the connecting ring 11. Two windings 9 are wound around the surface of the iron core 8. Two fixing plates 16 are fixedly connected to the top of the top shell 2. A pressing screw 17 is inserted in the middle of the fixing plate 16. A second pressing plate 18 is fixedly connected to one end of the pressing screw 17. A connecting plate 15 is fixedly connected to the top of the bottom shell 1. An anti-slip strip 19 is fixedly connected to the side of the bottom shell 1 near the connecting screw tube 3. The positioning ring 10 and the connecting ring 11 limit the installation of the iron core 8. The cooperation between the windings 9 and the iron core 8 facilitates the sensing and detection of the current of the wire passing through the middle. By rotating the pressing screw 17, the second pressing plate 18 is moved to the side of the connecting plate 15, which facilitates the electrical connection of the external wire to the two connecting plates 15, making it convenient for power supply connection. The anti-slip strip 19 improves the fixing strength of the bottom shell 1, prevents the bottom shell 1 from rotating after fixing, and improves the anti-slip effect.

[0026] As attached Figure 1-3 As shown, the hexagonal nut 7 is fixed to the side of the first extrusion plate 6 away from the bottom shell 1. The first extrusion plate 6 and the hexagonal nut 7 are threadedly connected to the outer surface of the connecting screw tube 3. The hexagonal nut 7 facilitates the rotation of the first extrusion plate 6, thereby facilitating the extrusion of the wall by the first extrusion plate 6, increasing the extrusion area and strength, and facilitating installation and fixing.

[0027] As attached Figure 3-5As shown, the bottom shell 1 has through holes 12 around its perimeter, and a rivet 14 is inserted into the center of the through hole 12. The top shell 2 has a threaded hole 13 on one side. One end of the rivet 14 extends into the threaded hole 13 and is threadedly connected to the threaded hole 13. One end of the connecting ring 11 has an annular groove inside. One end of the positioning ring 10 is fixedly connected to a convex ring, which is adapted to the annular groove. The convex ring is set inside the annular groove. The rivet 14 passes through the through hole 12 and is inserted into the threaded hole 13, which facilitates the combination and fixing of the top shell 2 and the bottom shell 1. This makes it convenient for assembly, disassembly and maintenance. The cooperation between the convex ring and the annular groove improves the docking stability of the positioning ring 10 and the connecting ring 11, and improves the stability of the iron core 8.

[0028] As attached Figure 2-5 As shown, one end of one winding 9 is electrically connected to two connecting plates 15 respectively. The fixing plate 16 and the connecting plate 15 correspond one-to-one. The extrusion screw 17 is threadedly connected to the fixing plate 16. A positioning rod is fixedly connected to one side of the second extrusion plate 18. A positioning block is fixedly connected to the side of the top shell 2 near the bottom shell 1. A positioning slot is opened on the side of the bottom shell 1 near the top shell 2. The positioning block is set inside the positioning slot, which facilitates the current detection of the power supply through the winding 9. The second extrusion plate 18 extrudes one end of the wire and limits it with the positioning rod, thereby improving the connection strength of the wire. The combination of the positioning block and the positioning slot improves the combination efficiency of the top shell 2 and the bottom shell 1 and facilitates positioning, installation and use.

[0029] The working principle of this utility model is as follows: When in use, the end of the connecting screw tube 3 near the rubber tube 4 is inserted through the wall, and then the first extrusion plate 6 is sleeved through the rubber tube 4. The hexagonal nut 7 is rotated to drive the first extrusion plate 6 to rotate on the surface of the connecting screw tube 3 until the bottom shell 1 and the first extrusion plate 6 are pressed against the wall, thus completing the fixed installation. The anti-slip strip 19 is used to improve the fixing strength of the bottom shell 1 and prevent the bottom shell 1 from generating rotational force.

[0030] Place the connecting wire between the second extrusion plate 18 and the connecting plate 15, and rotate the extrusion screw 17 to control the second extrusion plate 18 to extrude the wire connector, which facilitates power connection. Then, pass the wire to be tested through the wall through the middle of the rubber tube 4, the connecting screw tube 3, the bottom shell 1, and the top shell 2 to complete the installation and use.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wall bushing for a current transformer, comprising a base shell (1), characterized in that: The bottom shell (1) has a top shell (2) on one side and a connecting screw tube (3) fixedly connected to the other side. The middle part of the connecting screw tube (3) is fitted with a first extrusion plate (6) and a hexagonal nut (7). The opposite sides of the connecting screw tube (3) and the top shell (2) are both fixedly connected with rubber tubes (4). The middle part of the rubber tube (4) is fixedly fitted with an umbrella skirt (5). A positioning ring (10) and a connecting ring (11) are fixedly connected to the middle of opposite sides of the bottom shell (1) and the top shell (2), respectively. An iron core (8) is sleeved in the middle of the positioning ring (10) and the connecting ring (11), and two windings (9) are wound around the surface of the iron core (8). The top of the top shell (2) is fixedly connected to two fixing plates (16), and a pressing screw (17) is inserted in the middle of the fixing plate (16). A second pressing plate (18) is fixedly connected to one end of the pressing screw (17). A connecting plate (15) is fixedly connected to the top of the bottom shell (1), and an anti-slip strip (19) is fixedly connected to the side of the bottom shell (1) near the connecting screw tube (3).

2. The through-wall bushing for a current transformer according to claim 1, characterized in that: The hexagonal nut (7) is fixed on the side of the first extrusion plate (6) away from the bottom shell (1), and the first extrusion plate (6) and the hexagonal nut (7) are threadedly connected to the outer surface of the connecting screw tube (3).

3. The through-wall bushing for a current transformer according to claim 1, characterized in that: The bottom shell (1) has through holes (12) around its perimeter, and a rivet (14) is inserted into the middle of the through holes (12). The top shell (2) has a threaded hole (13) on one side, and one end of the rivet (14) extends into the threaded hole (13) and is threadedly connected to the threaded hole (13).

4. The through-wall bushing for a current transformer according to claim 1, characterized in that: One end of the connecting ring (11) has an annular groove, and one end of the positioning ring (10) is fixedly connected to a convex ring, which is adapted to the annular groove and is located inside the annular groove.

5. The through-wall bushing for a current transformer according to claim 1, characterized in that: One of the windings (9) is electrically connected to two connecting plates (15) at both ends respectively. The fixed plate (16) and the connecting plate (15) correspond one-to-one. The extrusion screw (17) is threadedly connected to the fixed plate (16). A positioning rod is fixedly connected to one side of the second extrusion plate (18).

6. The through-wall bushing of the current transformer according to claim 1, characterized in that: A positioning block is fixedly connected to the side of the top shell (2) near the bottom shell (1), and a positioning slot is opened on the side of the bottom shell (1) near the top shell (2), with the positioning block set inside the positioning slot.

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