Current transformer

Abstract

The utility model discloses a current transformer, which relates to the technical field of current measurement, and comprises a current transformer body, the upper surface of the current transformer body is fixedly connected with two connecting pieces, one side of the current transformer body is provided with an adjusting structure, and the adjusting structure comprises a long rod. One end of the long rod is fixedly connected with the current transformer body, the arc surface of the long rod is slidably connected with a long pipe, the arc surface of the long pipe is rotatably connected with a screw rod, the arc surface of the screw rod is in threaded connection with a connecting plate, the lower surface of the connecting plate is fixedly connected with an adjusting rod, and the lower end of the adjusting rod is fixedly connected with a limiting plate. According to the current transformer, the effect that the current transformer body can flexibly move forwards, backwards, leftwards and rightwards within a certain range of a distribution box is achieved, and the problem that the current transformer body is relatively fixed after being installed, so that holes need to be formed again for installation after the line layout in the distribution box is changed, and the overall complexity degree is improved is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of current measurement, in particular to a current transformer. Background Technique

[0002] Current measurement refers to measuring the current in a circuit. For the convenience of measurement, protection, and control, it needs to be converted into a relatively unified current. In addition, the voltage on the line is generally relatively high, and it is very dangerous to measure directly. Therefore, the current transformer plays the role of current measurement conversion and electrical isolation. It is usually installed in the distribution box and measured based on the principle of electromagnetic induction. It is composed of a closed iron core and windings, and is connected in series in the line where the current needs to be measured, converting the large current on the primary side into a small current on the secondary side for measurement.

[0003] The above-mentioned and existing related technologies often have the following defects: The current transformer is generally installed in the distribution box through connecting plates and bolts, which requires drilling holes in the distribution box during the installation process. However, after the installation is completed, the current transformer is fixed to the distribution box. Therefore, the layouts in different distribution boxes are different, and once there is a small-scale layout change in the internal components, the line positions change, and personnel need to remove the current transformer again and determine the drilling and installation according to the line positions. This not only increases the overall complexity but also consumes a lot of manpower and material resources due to the need to drill holes at different positions.

[0004] Therefore, we propose a current transformer. Content of the Utility Model

[0005] The purpose of the utility model is to provide a current transformer to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A current transformer, including a current transformer body, two connecting pieces are fixedly connected to the upper surface of the current transformer body, an adjusting structure is arranged on one side of the current transformer body, the adjusting structure includes a long rod, one end of the long rod is fixedly connected to the current transformer body, a long tube is slidably connected to the arc surface of the long rod, a screw rod is rotatably connected to the arc surface of the long tube, a connecting plate is threadedly connected to the arc surface of the screw rod, an adjusting rod is fixedly connected to the lower surface of the connecting plate, a limiting plate is fixedly connected to the lower end of the adjusting rod, a U-shaped frame is communicated with the arc surface of the long tube, the arc surface of the adjusting rod is slidably connected to the inner wall of the U-shaped frame, the limiting plate is located inside the U-shaped frame, a fixed tube is fixedly connected to the side of the long tube away from the current transformer body, a long strip is slidably connected to the inner wall of the fixed tube, and two mounting plates are fixedly connected to the side of the long strip away from the current transformer body.

[0007] The effects achieved by the above components are as follows: The current transformer body can move flexibly back and forth, left and right within a certain range of the distribution box, thus avoiding as much as possible the situation that the current transformer body is fixed after installation, which may lead to the problem of having to re-drill holes for installation when the wiring layout in the distribution box changes, increasing the overall complexity.

[0008] Preferably, the long rod is a cylindrical rod, and the inner wall size of the long tube is adapted to the arc size of the long rod.

[0009] The effects achieved by the above components are as follows: The current transformer body drives the long rod to rotate in the long tube, and the long rod, which is a cylindrical rod, plays a role in freely rotating at an angle.

[0010] Preferably, a pressure rod is fixedly connected to the lower surface of the connecting plate. The pressure rod penetrates through the fixed tube, and a pressing plate is fixedly connected to the lower end of the pressure rod. The lower surface of the pressing plate abuts against the long strip.

[0011] The effects achieved by the above components are as follows: The pressure rod drives the pressing plate to fit with the long strip through the connecting plate, and the pressure rod further limits and fixes the fixed tube.

[0012] Preferably, a filling pad is fixedly connected to the inner wall of the limiting plate, and the inner wall of the filling pad abuts against the arc surface of the long rod.

[0013] The effects achieved by the above components are as follows: The limiting plate drives the filling pad to fit and squeeze with the long rod, and the filling pad plays a role in keeping the fixed frame in close contact with the long tube as much as possible when adjusting the fixed frame.

[0014] Preferably, a support structure is provided on the lower surface of the current transformer body. The support structure includes a U-shaped plate, the inner wall of the U-shaped plate abuts against the current transformer body, two connecting rods are fixedly connected to one side of the U-shaped plate, circular rings are fixedly connected to the other sides of the two connecting rods, a positioning rod slidably penetrates through the upper surface of the U-shaped plate, a circular plate is fixedly connected to the lower end of the positioning rod, the lower surface of the circular plate abuts against the current transformer body, a spring is fixedly connected to the arc surface of the circular plate relative to the positioning rod, and the other end of the spring is fixedly connected to the U-shaped plate.

[0015] The effects achieved by the above components are as follows: The effect of supporting the wires inside the current transformer body is achieved, so that the wires are supported at a certain position in the middle of the current transformer body to a certain extent, thereby preventing as much as possible the wires from being in close contact with the current transformer body during complex wiring, which may reduce the measurement data, and thus improving the accuracy of measuring the current by the current transformer body.

[0016] Preferably, a driving frame is fixedly connected to the upper end of the positioning rod, and the driving frame is located on one side of the U-shaped plate.

[0017] The effects achieved by the above components are as follows: Pressing the U-shaped plate raises the driving frame and drives the positioning rod, and the driving frame plays a better role in moving the positioning rod.

[0018] Preferably, an arc plate is fixedly connected to the inner wall of the U-shaped plate, and the inner wall of the arc plate abuts against the arc surface of the current transformer body.

[0019] The effects achieved by the above components are as follows: The U-shaped plate drives the arc plate to fit with the current transformer body, and the arc plate achieves the effect of positioning the position of the U-shaped plate.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1. In the present utility model, by providing an adjustment structure, the current transformer can be flexibly moved back and forth, left and right within a certain range in the distribution box, and can also be freely rotated at multiple angles through the cylindrical long rod, so as to measure according to different wiring layouts and routing directions in the distribution box, effectively improving the adaptability and convenience of the current transformer in the distribution box, and at the same time not interfering with the adjustment of the angular position, and being easy for personnel to adjust and operate.

[0022] 2. In the present utility model, by providing a support structure, the effect of supporting the lines inside the current transformer body is achieved, so that the lines are supported at the middle position inside the current transformer body to a certain extent, thereby preventing the lines from being closely attached to the current transformer body during complex wiring and reducing measurement data, and thus improving the measurement accuracy of the current in the current transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0024] Figure 2 is of the present utility model Figure 1 partial structure schematic diagram;

[0025] Figure 3 is a schematic diagram of the structure at the U-shaped frame of the present utility model;

[0026] Figure 4 is a schematic diagram of the structure at the filling pad of the present utility model;

[0027] Figure 5 is a schematic diagram of the structure at the arc plate of the present utility model.

[0028] In the figure: 1. Current transformer body; 2. Connecting piece; 3. Adjusting structure; 301. Long rod; 302. Long tube; 303. Screw rod; 304. Connecting plate; 305. Adjusting rod; 306. Limiting plate; 307. U-shaped frame; 308. Fixed tube; 309. Long strip; 310. Mounting plate; 311. Pressing rod; 312. Pressing plate; 313. Filling pad; 4. Supporting structure; 41. U-shaped plate; 42. Connecting rod; 43. Ring; 44. Positioning rod; 45. Circular plate; 46. Spring; 47. Driving frame; 48. Arc plate. Detailed implementation manners

[0029] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figure 1 , the present invention provides a technical solution: a current transformer, including a current transformer body 1, two connecting pieces 2 are fixedly connected to the upper surface of the current transformer body 1, an adjusting structure 3 is provided on one side of the current transformer body 1, achieving the effect that the current transformer body 1 can move flexibly back and forth, left and right within a certain range in the distribution box, thereby avoiding as much as possible that the current transformer body 1 is relatively fixed after installation, so that when the wiring layout in the distribution box changes, it is necessary to re-open holes for installation, increasing the overall complexity. A supporting structure 4 is provided on the lower surface of the current transformer body 1, achieving the effect of supporting the lines in the current transformer body 1, so that the lines are supported at the middle position in the current transformer body 1 to a certain extent, thereby preventing as much as possible that the lines are in close contact with the current transformer body 1 during complex wiring, reducing the measurement data, and thus improving the accuracy of measuring the current of the current transformer body 1.

[0031] Next, the specific settings and functions of its adjusting structure 3 and supporting structure 4 will be specifically described.

[0032] As Figure 2 and Figure 3 as well as Figure 4As shown in the figure, the adjusting structure 3 includes a long rod 301. One end of the long rod 301 is fixedly connected to the current transformer body 1. A long tube 302 is slidably connected to the arc surface of the long rod 301. A screw rod 303 is rotatably connected to the arc surface of the long tube 302. A connecting plate 304 is threadedly connected to the arc surface of the screw rod 303. A regulating rod 305 is fixedly connected to the lower surface of the connecting plate 304. A limiting plate 306 is fixedly connected to the lower end of the regulating rod 305. A U-shaped frame 307 is communicated with the arc surface of the long tube 302. The arc surface of the regulating rod 305 is slidably connected to the inner wall of the U-shaped frame 307. The limiting plate 306 is located inside the U-shaped frame 307. A fixed tube 308 is fixedly connected to the side of the long tube 302 away from the current transformer body 1. A long strip 309 is slidably connected to the inner wall of the fixed tube 308. Two mounting plates 310 are fixedly connected to the side of the long strip 309 away from the current transformer body 1. The long rod 301 is a cylindrical rod, and the inner wall dimension of the long tube 302 is adapted to the arc dimension of the long rod 301. The current transformer body 1 drives the long rod 301 to rotate in the long tube 302. With the cylindrical long rod 301, it can freely rotate at an angle. A pressing rod 311 is fixedly connected to the lower surface of the connecting plate 304. The pressing rod 311 penetrates through the fixed tube 308. A pressing plate 312 is fixedly connected to the lower end of the pressing rod 311. The lower surface of the pressing plate 312 abuts against the long strip 309. The pressing rod 311 drives the pressing plate 312 to fit with the long strip 309 through the connecting plate 304. The pressing rod 311 further limits the fixed tube 308. A filling pad 313 is fixedly connected to the inner wall of the limiting plate 306. The inner wall of the filling pad 313 abuts against the arc surface of the long rod 301. The limiting plate 306 drives the filling pad 313 to fit and squeeze with the long rod 301. The filling pad 313 plays a role in keeping the fixed frame in close contact with the long tube 302 as much as possible when adjusting the fixed frame.

[0033] As Figure 5 shown in the figure, the supporting structure 4 includes a U-shaped plate 41. The inner wall of the U-shaped plate 41 abuts against the current transformer body 1. Two connecting rods 42 are fixedly connected to one side of the U-shaped plate 41. A ring 43 is fixedly connected to the other side of each of the two connecting rods 42. A positioning rod 44 slidably penetrates through the upper surface of the U-shaped plate 41. A circular plate 45 is fixedly connected to the lower end of the positioning rod 44. The lower surface of the circular plate 45 abuts against the current transformer body 1. A spring 46 is fixedly connected to the arc surface of the circular plate 45 relative to the positioning rod 44 on the upper surface. The other end of the spring 46 is fixedly connected to the U-shaped plate 41. A driving frame 47 is fixedly connected to the upper end of the positioning rod 44. The driving frame 47 is located on one side of the U-shaped plate 41. Pressing the U-shaped plate 41 to lift drives the driving frame 47 to drive the positioning rod 44. The driving frame 47 plays a better role in moving the positioning rod 44. An arc plate 48 is fixedly connected to the inner wall of the U-shaped plate 41. The inner wall of the arc plate 48 abuts against the arc surface of the current transformer body 1. The U-shaped plate 41 drives the arc plate 48 to fit with the current transformer body 1. The arc plate 48 achieves the effect of positioning the position of the U-shaped plate 41.

[0034] Working principle: When it is necessary to measure the current of the lines in the distribution box, first drill holes at the approximate positions of the line layout in the distribution box. Then connect the mounting plate 310 to the distribution box through bolts. Next, horizontally move the long tube 302. The fixed tube 308 slides on the surface of the long strip 309 through the long tube 302. After sliding to the appropriate position, release the long tube 302. Then rotate the current transformer body 1 to the appropriate angle according to the lines at different positions. Subsequently, move the current transformer body 1 back and forth. The long rod 301 rotates and moves in the long tube 302 through the current transformer body 1. At this time, the long rod 301 rotates and slides on the inner wall of the filling pad 313. The filling pad 313 plays a role in keeping the fixed frame as close as possible to the long tube 302 during the adjustment. Until it moves to the appropriate position back and forth, rotate the screw rod 303. The connecting plate 304 starts to descend through the rotation of the screw rod 303, thereby driving the adjusting rod 305 to slide on the inner wall of the U-shaped frame 307. The limiting plate 306 moves out of the U-shaped frame 307 through the adjusting rod 305, thereby driving the filling pad 313 to fit and squeeze the long rod 301 again, so that the long rod 301 is limited in the long tube 302. At this time, the pressing rod 311 drives the pressing plate 312 to fit and squeeze the long strip 309 through the fixed tube 308 through the movement of the connecting plate 304. The pressing rod 311 further limits the fixed tube 308, so that the long strip 309 is limited between the fixed tube 308, thereby limiting the current transformer body 1 after the installation and adjustment position. Finally, pass the line through the support structure 4 and then through the current transformer body 1. Then connect the wire to the connector 2. Through the current transformer body 1 composed of a closed iron core and windings, the large current on the primary side of the line is converted into a small current on the secondary side by the electromagnetic induction principle for measurement. Thus, the current passing data is obtained after being output through the wire of the connector 2.

[0035] When it is necessary to support the lines in the current transformer body 1, first press the U-shaped plate 41 to lift the driving frame 47. The positioning rod 44 slides in the U-shaped plate 41 through the driving frame 47. The driving frame 47 plays a role in better moving the positioning rod 44. The circular plate 45 makes the spring 46 in a compressed state through the positioning rod 44. Subsequently, move the U-shaped plate 41 close to the current transformer body 1. After the arc plate 48 fits with the current transformer body 1 through the U-shaped plate 41, the arc plate 48 achieves the effect of positioning the position of the U-shaped plate 41. Release the driving frame 47. At this time, the spring 46 is in an expanded state, squeezing the circular plate 45 to fit with the current transformer body 1, so that the inner wall of the U-shaped plate 41 and the current transformer body 1, and the connecting rod 42 drives the ring 43 to be located on both sides of the current transformer body 1 through the positioned U-shaped plate 41. Thus, pass the line through the inner wall of the ring 43 and then through the current transformer body 1, so that the line can be supported at the central position in the current transformer body 1 to a certain extent.

[0036] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0037] 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 principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A current transformer, comprising a current transformer body (1), characterized in that: Two connecting pieces (2) are fixedly connected to the upper surface of the current transformer body (1); an adjustment structure (3) is provided on one side of the current transformer body (1); the adjustment structure (3) comprises a long rod (301); one end of the long rod (301) is fixedly connected to the current transformer body (1); the arc surface of the long rod (301) is slidably connected to a long tube (302); the arc surface of the long tube (302) is rotatably connected to a screw rod (303); the arc surface of the screw rod (303) is threadedly connected to a connecting plate (304); the lower surface of the connecting plate (304) is fixedly connected to an adjustment rod (305). The lower end of the adjusting rod (305) is fixedly connected to a limit plate (306), the arc surface of the long tube (302) is connected to a U-shaped frame (307), the arc surface of the adjusting rod (305) is slidably connected to the inner wall of the U-shaped frame (307), the limit plate (306) is located in the U-shaped frame (307), the side of the long tube (302) away from the current transformer body (1) is fixedly connected to a fixed tube (308), the inner wall of the fixed tube (308) is slidably connected to a long strip (309), and the side of the long strip (309) away from the current transformer body (1) is fixedly connected to two mounting plates (310).

2. The current transformer according to claim 1, characterized in that: The long rod (301) is a cylindrical rod, and the inner wall size of the long tube (302) is adapted to the arc size of the long rod (301).

3. The current transformer according to claim 1, characterized in that: The lower surface of the connecting plate (304) is fixedly connected to a pressure rod (311), the pressure rod (311) passes through the fixed tube (308), the lower end of the pressure rod (311) is fixedly connected to a pressure plate (312), and the lower surface of the pressure plate (312) is in contact with the long strip (309).

4. The current transformer according to claim 1, characterized in that: A filling pad (313) is fixedly connected to the inner wall of the limiting plate (306), and the inner wall of the filling pad (313) abuts against the arc surface of the long rod (301).

5. The current transformer according to claim 1, characterized in that: A support structure (4) is provided on the lower surface of the current transformer body (1), and the support structure (4) includes a U-shaped plate (41), the inner wall of the U-shaped plate (41) is in contact with the current transformer body (1), one side of the U-shaped plate (41) is fixedly connected to two connecting rods (42), and the other sides of the two connecting rods (42) are fixedly connected to a ring (43), the upper surface of the U-shaped plate (41) is slidably penetrated by a positioning rod (44), the lower end of the positioning rod (44) is fixedly connected to a circular plate (45), the lower surface of the circular plate (45) is in contact with the current transformer body (1), and the upper surface of the circular plate (45) is fixedly connected to a spring (46) relative to the arc surface of the positioning rod (44), and the other end of the spring (46) is fixedly connected to the U-shaped plate (41).

6. The current transformer according to claim 5, characterized in that: The upper end of the positioning rod (44) is fixedly connected to a driving frame (47), and the driving frame (47) is located on one side of the U-shaped plate (41).

7. The current transformer according to claim 5, characterized in that: The inner wall of the U-shaped plate (41) is fixedly connected to a circular arc plate (48), and the inner wall of the circular arc plate (48) abuts against the circular arc surface of the current transformer body (1).

Images