Mutual inductor detection device

Abstract

The utility model discloses a mutual inductor detection device, belongs to the technical field of mutual inductor detection, and aims to solve the problems that in the prior art, a wire rod is usually arranged in the middle of a mutual inductor, so that the mutual inductor can sense current in the wire rod more accurately, and the current conversion precision of the mutual inductor at the position is detected; whether currents with different sizes can be accurately measured or not is judged, however, in actual operation, a detection device can only carry out fixed operation on mutual inductors with the same size generally, adaptive limiting cannot be carried out according to different specifications of the mutual inductors, and due to the fact that the specifications of the mutual inductors are different, the mutual inductors are different in size. And the wire rod cannot be stably positioned in the middle area of the mutual inductor in the detection operation, so that the detection data is influenced to a certain extent. Comprising a base frame, an assembly frame is fixedly arranged in the middle of the upper portion of the base frame, centering mechanisms are installed in and above the assembly frame, and fixing columns are fixedly arranged on the two sides of the upper portion of the base frame.

Description

Technical Field

[0001] This utility model belongs to the field of current transformer detection technology, and specifically relates to a current transformer detection device. Background Technology

[0002] Instrument transformers, also known as instrument transformers, are a general term encompassing current transformers and voltage transformers. Their main function is to proportionally transform high voltage or large current into standard low voltage or standard small current, enabling the standardization and miniaturization of measuring instruments, protection equipment, and automatic control equipment. With industrial development, the demand for instrument transformers is increasing. To ensure the quality of instrument transformer production, they are typically tested using an instrument transformer test bench before leaving the factory.

[0003] In current transformer testing, the wire is typically placed in the center of the transformer to allow the transformer to more accurately sense the current in the wire. This allows for testing the transformer's current conversion accuracy at that location and determining whether it can accurately measure different current magnitudes. However, in practice, testing devices are usually only suitable for transformers of the same size and cannot be adapted to different transformer specifications. Furthermore, due to the varying sizes of transformers, it is impossible to guarantee that the wire will remain stably centered within the transformer during testing, thus affecting the test data to some extent. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a current transformer testing device. This device addresses the problem that existing technologies typically place the wire in the center of the current transformer to allow the transformer to more accurately sense the current in the wire, thereby testing the current conversion accuracy at that position and determining whether it can accurately measure different current magnitudes. However, in actual operation, the testing device can usually only be used for fixed operations on current transformers of the same size, and cannot be adapted to limit the movement of different current transformer specifications. Furthermore, due to the different sizes of current transformers, it is impossible to guarantee that the wire can be stably positioned in the center of the current transformer during testing, thus affecting the test data to some extent.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides a current transformer testing device, including a base frame, an assembly frame fixedly mounted on the upper center of the base frame, and a centering mechanism installed inside and above the assembly frame. Fixed columns are fixedly mounted on both sides of the upper part of the base frame, and a line limiting mechanism is installed above the two fixed columns. The centering mechanism includes a lifting component, which is installed inside the assembly frame. The lifting component includes a guide frame, and a processing table is fixedly mounted above the guide frame. A fixing component is jointly installed inside and below the processing table, and an initial horizontal bar is fixedly mounted on one side of the upper part of the processing table.

[0008] Furthermore, the lifting assembly includes a transmission screw, which is installed inside one side of the assembly frame. A first motor is installed at one end of the transmission screw, and a screw sleeve is screwed around one side of the transmission screw. A guide frame is fixed around and inside the screw sleeve, and a guide rod is fixed inside the other side of the assembly frame.

[0009] Furthermore, the guide rod and the guide frame are connected by a movable guide connection.

[0010] Furthermore, the fixing component includes a second motor, which is installed at the bottom center of the processing table. The output end of the second motor is connected to a transmission rod, and a gear is fixed around one end of the transmission rod. A rack guide is meshed on both sides of the gear. Pre-set slots for installing the rack guide are opened on different sides of the upper two sides of the processing table, and first guide slots are provided on the side and bottom of the pre-set slots. A limiting plate is fixed above one side of the rack guide, and second guide slots are opened on different sides of the upper two sides of the processing table.

[0011] Furthermore, the first guide groove and the rack guide are connected by a movable guide connection.

[0012] Furthermore, the second guide groove forms a guiding connection with the limiting plate.

[0013] Furthermore, the line limiting mechanism includes a mounting frame, which is fixed above the fixed column. The mounting frame has two inner sides equipped with return springs, and the inner ends of the two return springs are connected to a clamping slider. The inner side of the clamping slider is provided with an insulating inner pad, and a sliding groove is opened at the bottom middle part of the mounting frame.

[0014] Furthermore, the clamping sliders and the insulating inner pads are symmetrically distributed along the vertical central axis of the mounting frame, and the two clamping sliders are slidably connected to the slide groove.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention allows the operator to pre-place the current transformer to be tested on the processing table, with one side aligned with the initial horizontal bar. Then, the second motor is started to rotate the transmission rod and gear. This causes the rack guides on both sides, meshing with the gear, to move relative to each other, guided by the first and second guide grooves, using their respective fixed limiting plates. This achieves centered clamping of current transformers of different sizes. The operator can then control the lifting assembly to ensure the current transformer remains centered on the wire to be tested, depending on its size. The adjustment method involves starting the first motor to rotate the transmission screw. The screw sleeve, interacting with the screw, lifts the guide frame and processing table, guided by the guide rod. At this point, the current transformer centered on the processing table moves synchronously until its central position matches the central position of the mounting frames on both sides.

[0018] This invention allows personnel to pass the wire through the middle of the current transformer and simultaneously mount both sides of the wire on the middle of the mounting frame. At this moment, the clamping sliders on both sides of the middle of the mounting frame and the inner insulating pads can stably clamp the wire harness under the guidance of the return spring and the sliding groove, thereby ensuring that the wire harness is in the center of the current transformer. At this moment, personnel can use the current transformer to sense and detect the current or voltage in the wire. The test results can then be compared to verify whether the current transformer is qualified. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the assembly rack;

[0022] Figure 3 This is a top view of a partial structure of the fixed component;

[0023] Figure 4 for Figure 1 Schematic diagram of the structure at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the line limiting mechanism.

[0025] The labels in the attached diagram are as follows: 1. Base frame; 2. Assembly frame; 3. Centering mechanism; 31. Lifting assembly; 311. Drive screw; 312. First motor; 313. Screw sleeve; 314. Guide frame; 315. Guide rod; 32. Processing table; 33. Fixing assembly; 331. Second motor; 332. Drive rod; 333. Gear; 334. Rack guide; 335. Preset groove; 336. First guide groove; 337. Limiting plate; 338. Second guide groove; 34. Initial horizontal bar; 4. Fixed column; 5. Line limiting mechanism; 51. Mounting frame; 52. Return spring; 53. Clamping slider; 54. Insulating inner pad; 55. Slide groove. Detailed Implementation

[0026] 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.

[0027] This specific embodiment is a current transformer detection device, and its structural schematic diagram is shown below. Figures 1 to 5As shown, the assembly includes a base frame 1, an assembly frame 2 fixedly mounted at the upper center of the base frame 1, and a centering mechanism 3 installed inside and above the assembly frame 2. Fixed posts 4 are fixedly mounted on both sides of the upper part of the base frame 1, and a line limiting mechanism 5 is installed above the two fixed posts 4. The centering mechanism 3 includes a lifting assembly 31, which is installed inside the assembly frame 2. The lifting assembly 31 includes a transmission screw 311, which is installed on one side of the inside of the assembly frame 2. A first motor 312 is mounted at one end of the transmission screw 311, and a screw sleeve 313 is screwed around one side of the transmission screw 311. A guide frame 314 is fixed around and inside the screw sleeve 313. The assembly frame 2... A guide rod 315 is fixedly provided on the other side of the part. The guide rod 315 and the guide frame 314 are connected by a movable guide. A processing table 32 is fixedly provided above the guide frame 314. A fixing component 33 is jointly installed inside and below the processing table 32. The fixing component 33 includes a second motor 331, which is installed at the bottom center of the processing table 32. The output end of the second motor 331 is connected to a transmission rod 332. A gear 333 is fixedly provided around one end of the transmission rod 332. A rack guide 334 meshes with both sides of the gear 333. Pre-set slots 335 for mounting the rack guide 334 are opened on different sides of the upper two sides of the processing table 32. The sides and bottom of the pre-set slots 335 are respectively provided with The first guide groove 336 is connected to the rack guide 334 by a movable guide connection. A limiting plate 337 is fixedly installed on the upper side of one side of the rack guide 334. Second guide grooves 338 are opened on different sides of the upper sides of the processing table 32. The second guide grooves 338 and the limiting plate 337 form a guide connection. An initial horizontal bar 34 is fixedly installed on one side of the upper side of the processing table 32. The operator can place the current transformer to be tested on the upper side of the processing table 32 in advance, with one side in contact with the initial horizontal bar 34. Then, the second motor 331 is started to make the transmission rod 332 and gear 333 rotate. Thus, the rack guides 334 on both sides that mesh with the gear 333 can carry their respective fixed limiting plates 337. The relative displacement is achieved by cooperating with the dual guidance of the first guide groove 336 and the second guide groove 338, thereby achieving the centering clamping operation of current transformers of different sizes. Subsequently, the personnel can control the lifting component 31 to keep the center of the current transformer in the center of the wire to be tested, according to the size of the current transformer being tested. The adjustment method is as follows: the personnel start the first motor 312 to rotate the transmission screw 311, thereby the screw sleeve 313 interacting with the screw can lift the guide frame 314 and the processing table 32 with the guidance of the guide rod 315. At this time, the current transformer centered above the processing table 32 can be moved synchronously until its central position matches the central position of the mounting frames 51 on both sides.

[0028] The wire limiting mechanism 5 includes a mounting frame 51, which is fixed above the fixed column 4. Return springs 52 are installed on both inner sides of the mounting frame 51, and clamping sliders 53 are connected to the inner ends of the two return springs 52. Insulating pads 54 are provided on the inner side of the clamping sliders 53. A groove 55 is provided at the bottom center of the mounting frame 51. The clamping sliders 53 and insulating pads 54 are symmetrically distributed along the vertical central axis of the mounting frame 51, and the two clamping sliders 53 are slidably connected to the groove 55. When a person passes the wire through the middle of the current transformer, they simultaneously mount both sides of the wire on the middle of the mounting frame 51. At this moment, the clamping sliders 53 and the insulating pads 54 on both sides of the middle of the mounting frame 51 can stably clamp the wire harness under the guidance of the return springs 52 and the groove 55, thus ensuring that the wire harness is centered in the current transformer. At this moment, the person can use the current transformer to sense and detect the current or voltage in the wire. The detection results can then be compared to verify whether the current transformer is qualified.

[0029] Working principle: The operator can pre-place the current transformer to be tested on the processing table 32, with one side aligned with the initial horizontal bar 34. Then, the second motor 331 is started to rotate the transmission rod 332 and gear 333. The rack guides 334 on both sides, meshing with the gear 333, can move relative to each other with their fixed limiting plates 337, guided by the double guidance of the first guide groove 336 and the second guide groove 338. This achieves the centering clamping operation for current transformers of different sizes. Subsequently, the operator can control the lifting assembly 31 to keep the current transformer centered with the wire to be tested, depending on its size. The adjustment method is as follows: the operator starts the first motor 312 to rotate the transmission screw 311, thereby... The lead screw sleeve 313, acting as a lever, can lift up with the guide frame 314 and the processing table 32 in coordination with the guide rod 315. At this time, the current transformer, which is centered above the processing table 32, can move synchronously until its central position matches the central position of the mounting frames 51 on both sides. Then, the operator passes the wire through the middle of the current transformer and mounts both sides of the wire on the middle of the mounting frame 51. At this time, the clamping sliders 53 and the inner insulating pads 54 on both sides of the middle of the mounting frame 51 can stably clamp the wire harness under the guidance of the return spring 52 and the slide groove 55, thereby ensuring that the wire harness is in the central position of the current transformer. At this time, the operator can use the current transformer to sense and detect the current or voltage in the wire. The test results can be compared to verify whether the current transformer is qualified.

[0030] All technical features in this embodiment can be freely combined according to actual needs.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 transformer detection device comprising a base frame (1), characterized in that, An assembly frame (2) is fixedly provided in the upper middle part of the base frame (1), and a centering mechanism (3) is installed inside and above the assembly frame (2). Fixed columns (4) are fixedly provided on both sides above the base frame (1), and a line limiting mechanism (5) is installed above the two fixed columns (4). The centering mechanism (3) includes a lifting component (31), and the lifting component (31) is installed inside the assembly frame (2). The lifting component (31) includes a guide frame (314), and a processing table (32) is fixedly provided above the guide frame (314). A fixing component (33) is jointly installed inside and below the processing table (32), and an initial horizontal bar (34) is fixedly provided on one side above the processing table (32).

2. The transformer detection device of claim 1, wherein, The lifting assembly (31) includes a transmission screw (311), which is installed on one side of the inside of the assembly frame (2). A first motor (312) is installed at one end of the transmission screw (311), and a screw sleeve (313) is screwed around one side of the transmission screw (311). A guide frame (314) is fixed around and inside the screw sleeve (313), and a guide rod (315) is fixed on the other side of the inside of the assembly frame (2).

3. A transformer detection device according to claim 2, characterised in that, The guide rod (315) and the guide frame (314) are connected by a movable guide.

4. The transformer detection device of claim 1, wherein, The fixing component (33) includes a second motor (331), which is installed at the bottom center of the processing table (32). The output end of the second motor (331) is connected to a transmission rod (332), and a gear (333) is fixed around one end of the transmission rod (332). A rack guide (334) meshes with both sides of the gear (333). Preset slots (335) for installing the rack guide (334) are opened on different sides of the upper two sides of the processing table (32). First guide slots (336) are provided on the side and bottom of the preset slots (335). A limiting plate (337) is fixed above one side of the rack guide (334). Second guide slots (338) are opened on different sides of the upper two sides of the processing table (32).

5. A transformer detection device according to claim 4, characterised in that, The first guide groove (336) and the rack guide (334) are connected by a movable guide.

6. A transformer detection device according to claim 4, characterised in that The second guide groove (338) forms a guide connection with the limiting plate (337).

7. The current transformer detection device according to claim 1, characterized in that, The line limiting mechanism (5) includes a mounting frame (51), which is fixed above the fixed column (4). The mounting frame (51) has two inner sides equipped with return springs (52), and the inner ends of the two return springs (52) are connected to a clamping slider (53). The inner side of the clamping slider (53) is provided with an insulating inner pad (54). The bottom middle part of the mounting frame (51) is provided with a groove (55).

8. A transformer detection device according to claim 7, characterised in that, The clamping slider (53) and the insulating inner pad (54) are symmetrically distributed along the vertical central axis of the mounting frame (51), and the two clamping sliders (53) are slidably connected to the slide groove (55).

Images