Current transformer inspection device

Abstract

The utility model relates to the technical field of current transformer inspection equipment, and particularly discloses a current transformer inspection device which comprises a calibrator, the calibrator comprises a box body and a cover plate hinged to the opening end of the box body, and telescopic supporting legs are hinged to the left side and the right side of the box body; the whole telescopic supporting leg is arranged in an inverted concave shape; fixing rods are arranged between the telescopic supporting legs and the box body; a limiting plate is hinged to the box body; the fixing rod is shorter than the inner cavity of the box body. Compared with the prior art, the calibration instrument and the lifting structure can be integrally arranged, carrying is convenient, and the application range is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformer testing equipment, and specifically discloses a current transformer testing device. Background Art

[0002] A current transformer is an electrical instrument used to measure current. It converts a large primary current into a smaller secondary current based on the principle of electromagnetic induction. Currently, current transformer field calibrators are commonly used for current transformer calibration and analysis. However, existing current transformer field calibrators are difficult to adjust in height, making them difficult to accommodate workers of varying body types, thus impacting inspection efficiency.

[0003] To solve the above problems, the patent with announcement number CN218003699U discloses a transformer characteristic analysis device, which includes a supporting platform body, a limit slot is provided at the top of the supporting platform body, and a storage slot is provided on the side of the top of the supporting platform body close to the limit slot. The lifting structure includes a motor, a screw, a nut and a bearing, and a base is installed at the bottom end of the lifting structure. A working box, a control panel, a transformer tester, a standard current transformer, a lifting frame, a lifting structure, a core-through test chuck and a horn-type test chuck are arranged.

[0004] In the above solution, during on-site inspection of the current transformer, the current transformer on-site calibrator and the lifting structure are separately arranged, which makes it inconvenient to carry and reduces the scope of application. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a current transformer testing device to solve the problem that the current transformer on-site calibrator and the lifting structure are separated, resulting in inconvenience in carrying and reducing the scope of application.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] A current transformer testing device includes a calibrator, which includes a box and a cover hinged at the open end of the box. Telescopic legs are hinged on the left and right sides of the box; the telescopic legs are arranged in an inverted concave shape as a whole; a fixing rod is arranged between the telescopic legs and the box; a limit plate is hinged on the box; the length of the fixing rod is less than the length of the inner cavity of the box. The telescopic legs hinged on the left and right sides of the box can adjust the length of the telescopic legs, and then adjust the height of the calibrator to achieve the function of lifting and lowering; the setting of the fixing rod can fix the telescopic legs and the box to ensure structural stability. The setting of the limit plate can limit the position of the telescopic legs when the telescopic legs are folded to the left and right sides of the box, making it easy to carry. The length of the fixing rod is less than the length of the inner cavity of the box, and the fixing rod can be placed in the box for easy carrying.

[0008] Preferably, convex surfaces are fixedly provided on both the left and right side walls of the box; the limit plates are hinged to the upper edge of the convex surfaces; and the inner sides of the ends of the telescopic legs are hinged to the lower side walls of the convex surfaces. The convex surfaces can reduce external interference when the telescopic legs are folded to the sides of the box, ensuring the stability of the telescopic legs and convenient portability.

[0009] Preferably, the telescopic leg comprises two square tubes; one end of each square tube is hinged to the convex surface; a slide rod is inserted into each square tube; the ends of the two slide rods, away from the square tubes, are fixedly connected by a connecting rod; a plurality of threaded holes (I) are provided on the left and right side surfaces of the square tubes; a plurality of through holes (I) are provided on the slide rods; screws are provided in the threaded holes (I) and through holes (I) to secure the slide rods to the square tubes. The depth of the slide rods within the square tubes can be adjusted, thereby adjusting the length of the telescopic leg.

[0010] Preferably, a second threaded hole is provided on the front side of the square tube; a third threaded hole is provided on the front and rear sides of the box body; and a fixing rod is fixed to the second and third threaded holes by bolts. The fixing rod is used to fix the position of the telescopic legs and the box body to ensure the stability of the telescopic legs.

[0011] Preferably, the fixing rod is provided with a plurality of through holes 2. Bolts can be passed through different through holes 2 to adjust the linear distance between the threaded hole 2 and the threaded hole 3, thereby adjusting the angle between the plane where the telescopic legs are located and the left and right sides of the box body, thereby facilitating the adjustment of the height of the box body and facilitating the setting according to different sites, thereby increasing the scope of application.

[0012] Preferably, bosses are provided at the corners of the bottom surface of the box body. The provision of the bosses can limit the arc of rotation of the telescopic legs around the hinged connection with the box body.

[0013] The beneficial effects of this utility model are as follows: the telescopic legs, hingedly mounted on the left and right sides of the box, can adjust the length of the legs, and thus the height of the calibrator, achieving a lifting function; the provision of fixing rods can secure the telescopic legs and the box, ensuring structural stability. The provision of limit plates can restrict the position of the telescopic legs when they are retracted to the left and right sides of the box, facilitating portability. This current transformer testing device can integrate the calibrator and lifting structure, making it easy to carry and expanding its scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 This is a schematic diagram of the structure of the telescopic legs of the present invention when they are lowered;

[0016] Figure 2 This is a schematic diagram of the structure of the telescopic legs of the present invention when they are folded and the fixing rods are removed;

[0017] Figure 3 This is a schematic diagram of the structure of the present invention after removing the telescopic legs and the fixing rod;

[0018] Figure 4 It is a structural schematic diagram of the telescopic supporting legs of the present utility model.

[0019] Description of reference numerals:

[0020] 1-calibrator, 2-fixing rod, 3-limiting plate, 4-square tube, 5-sliding rod, 6-connecting rod, 7-screw;

[0021] 101-box body, 102-cover plate, 103-convex surface, 104-threaded hole three, 105-boss; 201-through hole two; 401-threaded hole one, 402-threaded hole two; 501-through hole one. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1-4 As shown, a current transformer testing device includes a calibrator 1. The calibrator 1 comprises a housing 101 and a cover 102 hinged to the open end of the housing 101. The calibrator body is disposed within the housing 101. Telescopic legs are hinged to the left and right sides of the housing 101. The telescopic legs are arranged in an inverted concave shape. A fixing rod 2 is disposed between the telescopic legs and the housing 101. A limit plate 3 is hinged to the housing 101. The length of the fixing rod 2 is less than the length of the interior of the housing 101. The telescopic legs hinged to the left and right sides of the housing 101 can be adjusted in length, thereby adjusting the height of the calibrator 1 to achieve a lifting function. The fixing rod 2 secures the telescopic legs and the housing 101, ensuring structural stability. The limit plates 3 restrict the position of the telescopic legs when they are retracted to the left and right sides of the housing 101, making them easier to carry. The fixing rod 2 is less than the length of the interior of the housing 101, allowing it to be placed inside the housing 101 for easy portability.

[0025] In the above configuration, convex surfaces 103 are fixedly provided on both the left and right side walls of the box 101; the limit plate 3 is hinged to the upper portion of the convex surface 103 near the edge; and the inner sides of both ends of the telescopic legs are hinged to the lower side walls of the convex surface 103. The provision of the convex surface 103 can reduce external interference when the telescopic legs are retracted to the sides of the box 101, ensuring the stability of the telescopic legs and convenient portability. The telescopic legs include two square tubes 4; the inner side of each square tube 4 is hinged to the convex surface 103; a sliding rod 5 is inserted into each square tube 4; the ends of the two sliding rods 5 away from the square tube 4 are fixedly connected by a connecting rod 6; a plurality of threaded holes 401 are provided on the left and right side surfaces of the square tube 4; a plurality of through holes 501 are provided on the sliding rod 5; screws 7 are provided in the threaded holes 401; the screws 7 can pass through the threaded holes 401 and the through holes 501 to fix the sliding rod 5 to the square tube 4. The depth of the slide rod 5 within the square tube 4 can be adjusted, thereby adjusting the length of the telescopic leg. A second threaded hole 402 is provided on the front side of the square tube 4; a third threaded hole 104 is provided on the front and rear sides of the housing 101. The fixing rod 2 is secured to the second and third threaded holes 402 and 104 via bolts. The fixing rod 2 secures the position of the telescopic leg and the housing 101, ensuring stability of the telescopic leg.

[0026] The fixing rod 2 is provided with a plurality of second through holes 201. Bolts can be passed through different second through holes 201 and then installed in the second threaded hole 402 and the third threaded hole 104. The straight-line distance between the second threaded hole 402 and the third threaded hole 104 can be adjusted, and the angle between the plane where the telescopic legs are located and the left and right sides of the box body 101 can be adjusted. This facilitates the adjustment of the height of the box body 101 and facilitates the setting according to different sites, thereby increasing the scope of application.

[0027] Example 2

[0028] Based on Example 1, a boss 105 is provided at the corner of the bottom surface of the box body 101. The provision of the boss 105 can limit the arc of rotation of the telescopic leg around the hinge between the telescopic leg and the box body 101.

[0029] By using the current transformer testing device, the calibrator 1 and the lifting structure can be integrated into one unit, which is convenient to carry and increases the scope of application.

[0030] The calibrator body usually includes the following components:

[0031] Standard current transformers (CTs): These provide a reference for known, accurate current values. They are professionally calibrated for high accuracy and stability. During calibration, the CT to be calibrated is connected to the standard CT, and the outputs are compared to calibrate the device.

[0032] A calibration current source is a device with an adjustable current output, commonly used to calibrate current transformers. It provides a stable, adjustable current output, typically with high accuracy and stability.

[0033] Calibration instruments: These instruments measure and display the output values ​​of current transformers and standard equipment. These instruments typically have high resolution and accuracy, providing reliable measurement results and enabling data logging and analysis.

[0034] Calibration software: A computer program used to automate the calibration process. By connecting the calibration equipment to a computer, calibration software enables automated control and data logging, improving calibration efficiency and accuracy. In addition to the aforementioned equipment, auxiliary equipment and tools such as connection cables, calibration potentiometers, and calibration loads may be required to ensure the correct and accurate calibration process.

[0035] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any changes or substitutions that can be easily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A current transformer testing device, comprising a calibrator (1), the calibrator (1) comprising a box (101) and a cover (102) hinged to an open end of the box (101), characterized in that: Telescopic legs are hinged on both left and right sides of the box body (101); the telescopic legs are arranged in an inverted concave shape as a whole; a fixing rod (2) is arranged between the telescopic legs and the box body (101); a limit plate (3) is hinged on the box body (101); the length of the fixing rod (2) is less than the length of the inner cavity of the box body (101).

2. The current transformer testing device according to claim 1, characterized in that: The left and right side walls of the box body (101) are both fixedly provided with convex surfaces (103); the limiting plate (3) is hinged to the upper part of the convex surface (103) near the edge; the inner sides of the two ends of the telescopic legs are hinged to the lower side wall of the convex surface (103).

3. The current transformer testing device according to claim 2, characterized in that: The telescopic legs include two square tubes (4); one end of each square tube (4) is hinged on the inner side of the convex surface (103); a slide rod (5) is inserted into each square tube (4); the ends of the two slide rods (5) away from the square tube (4) are fixedly connected by a connecting rod (6); a plurality of threaded holes (401) are provided on the left and right side surfaces of the square tube (4); a plurality of through holes (501) are provided on the slide rod (5); a screw (7) is provided in the threaded hole (401); the screw (7) can pass through the threaded hole (401) and the through hole (501) to fix the slide rod (5) on the square tube (4).

4. The current transformer testing device according to claim 3, characterized in that: A second threaded hole (402) is provided on the front side of the square tube (4); a third threaded hole (104) is provided on the front and rear sides of the box body (101); and the fixing rod (2) is fixed to the second threaded hole (402) and the third threaded hole (104) by bolts.

5. The current transformer testing device according to claim 4, characterized in that: The fixing rod (2) is provided with a plurality of second through holes (201).

6. The current transformer testing device according to claim 4, characterized in that: Bosses (105) are provided at the corners of the bottom surface of the box body (101).

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