Current transformer detection device

Abstract

The utility model discloses a current transformer detection device, particularly relates to the technical field of current transformers, and comprises a test board, a rotating mechanism is fixedly connected to the middle of the upper end of the test board, a fixing mechanism is rotatably connected to the upper end of the rotating mechanism, and a detection mechanism is fixedly connected to the rear side of the middle of the upper end of the test board. The left part of the rear side of the upper end of the test bench is fixedly connected with a mutual inductor tester, the lower part of the right end of the mutual inductor tester is fixedly connected with a connecting wire, and one end, far away from the mutual inductor tester, of the connecting wire is fixedly connected to the front part of the detection mechanism. According to the current transformer detection device provided by the utility model, current transformers with different sizes can be fixed through the arranged fixing mechanism, the situation of position deviation or shaking in the detection process can be avoided, the relative position between the secondary side winding and the detection probe can be ensured to be accurate, and the detection efficiency is improved. And the precision of transformation ratio and phase difference detection is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a current transformer technical field, especially a kind of current transformer detection device. BACKGROUND

[0002] Current transformer detection device is a kind of automatic detection instrument, mainly used to test the performance indicators of current transformer, such as volt-ampere characteristic, transformation ratio, polarity, error curve, etc., and current transformer is the instrument that converts primary side large current into secondary side small current to measure according to electromagnetic induction principle. It is mainly composed of closed core and winding, and the transformation ratio error and phase difference of current transformer will affect the accuracy of measurement results. For example, in electric energy metering, if the transformation ratio error of current transformer is too large, it will lead to inaccurate electric energy metering, and current transformer may fail, for example, long-term overload may cause winding overheating damage, and insulation aging may cause short circuit fault, so a current transformer detection device is needed.

[0003] Chinese patent publication No. CN221124858U discloses a kind of current transformer detection device, including detection instrument, the outside of the detection instrument is provided with the box for installing detection instrument, the side of the box is provided with the box cover for and box matching, the bottom of the box is provided with the adjusting mechanism for adjusting the height of box;The above patent document utilizes the design of detection instrument, box, connecting piece and adjusting mechanism, by rotating support column, the rotation between screw rod and support column can be formed, so that support column moves away from connecting column direction, the length between connecting column and support column is increased, then the box is inserted in the top of connecting column through placing groove, the height of box is lifted, the distance between detection instrument and current transformer is reduced, when detecting current transformer, the operation of detection instrument can be carried out in time when problem is found during detection, without bending to operate, bring convenience to the operation of detection instrument.

[0004] The above patent document still has the following defects in the implementation process.

[0005] Although the above patent document can detect current transformer, it cannot fix different sizes of current transformer during use, which may cause position deviation or shaking during detection, and cannot guarantee the accurate relative position between secondary winding and detection probe, which may reduce the detection accuracy of transformation ratio and phase difference, and the performance of current transformer may change due to different installation angles. The above device cannot rotate the transformer around the center axis during detection, and cannot detect the transformation ratio at multiple angles, so it cannot ensure accurate current measurement, which may cause transformation ratio error due to angle problem. UTILITY MODEL CONTENTS

[0006] The utility model discloses a current transformer detection device can effectively solve the problem of being unable to fix.

[0007] To realize the above-mentioned purpose, the utility model takes the technical scheme for:

[0008] A current transformer detection device, including test board, the test board upper end middle part is fixedly connected with rotating mechanism, the rotating mechanism upper end is rotatably connected with fixed establishment, the test board upper end middle part rear side and fixedly connected with detection establishment, the test board upper end rear side left part is fixedly connected with mutual inductor testing instrument, the mutual inductor testing instrument right end lower part is fixedly connected with connecting wire, the connecting wire is fixedly connected to the detection establishment front part with one end away from the mutual inductor testing instrument.

[0009] Preferably, the rotating mechanism includes a support frame and a fixed plate, the support frame is fixedly connected to the middle part of the lower end of the test board, the fixed plate is fixedly connected to the middle part of the upper end of the test board, the fixed plate is provided with an annular groove on the side away from the shaft, the support frame is rotatably connected with a worm gear at the middle part of the upper end, the worm gear is rotatably connected with a worm at the front side of the outer surface, and the support frame is fixedly connected with a motor at the right side of the front part of the upper end.

[0010] Preferably, the worm gear extends to the outside through the lower end of the test board and the lower end of the fixed plate, and the output end of the motor is fixedly connected with the right end of the worm through a shaft coupling.

[0011] Preferably, the fixed mechanism includes a support box, the support box is rotatably connected in the annular groove, the support box is provided with a gas bag on the bottom wall of the inner cavity, a plurality of holes are arranged on the upper end of the support box in the form of an annular array, a plurality of support columns are slidably connected in the inner cavities of the holes, and a plurality of ball blocks are fixedly connected to the lower ends of the support columns.

[0012] Preferably, the lower end of the support box is fixedly connected with the middle part of the upper end of the test board.

[0013] Preferably, the detection mechanism includes a fixed box, the fixed box is fixedly connected to the rear side of the upper end of the test board, the fixed box is rotatably connected with two lead screws on the left side and the right side of the middle part of the upper wall of the inner cavity, the left side of the bottom wall of the fixed box is fixedly connected with a motor, two gear sets are fixedly connected to the lower ends of the two lead screws, two sliding blocks are threadedly connected to the outer surfaces of the two lead screws, a fixed box is fixedly connected between the opposite surfaces of the two sliding blocks, an electric telescopic rod is fixedly connected to the middle part of the inner cavity of the fixed box, and a detection head is fixedly connected to the output end of the electric telescopic rod.

[0014] Preferably, the two gear sets are each composed of two vertical and horizontal meshing conical gears, the middle parts of the two vertical conical gears are fixedly connected with a rotating rod, and the output end of the motor is fixedly connected to the left end of the rotating rod through a shaft coupling.

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

[0016] 1、 the utility model discloses in the use process, the fixed mechanism that sets up can fix the current transformer of different size, will not appear position deviation or wobble in the detection process, can guarantee the relative position of the secondary side winding and detection probe is accurate, effectively improve the precision of ratio and phase difference detection.

[0017] 2、 the utility model discloses in the use process, the rotary mechanism that sets up can make the mutual inductor rotate around the center axis in the detection process, can detect its ratio under multiple angles, thereby ensuring that the ratio error caused by angle problem can not be accurately measured current. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is rotary mechanism section structure schematic diagram of the utility model;

[0020] Figure 3 It is fixed mechanism section structure schematic diagram of the utility model;

[0021] Figure 4 It is detection mechanism section structure schematic diagram of the utility model;

[0022] Figure 5 It is another view schematic diagram of the whole structure of the utility model.

[0023] In the drawing: 1, test table;2, rotary mechanism;21, support frame;22, fixed plate;23, annular groove;24, worm;25, motor one;26, worm;3, fixed mechanism;31, support box;32, hole;33, air bag;34, support column;35, ball block;4, detection mechanism;41, fixed box;42, motor two;43, rotating rod;44, screw;45, gear set;46, sliding block;47, fixed box;48, electric telescopic rod;49, detection head;5, mutual inductor tester;6, connecting line. DETAILED DESCRIPTION

[0024] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0025] For example, Figure 1As shown, a current transformer detection device, including test table 1, the test table 1 upper end middle part is fixedly connected with rotating mechanism 2, the rotating mechanism 2 upper end is rotatably connected with fixed mechanism 3, the test table 1 upper end middle part rear side and fixedly connected with detection mechanism 4, the test table 1 upper end rear side left part is fixedly connected with mutual inductor tester 5, the mutual inductor tester 5 right end lower part is fixedly connected with connecting line 6, the connecting line 6 is fixedly connected to the front part of detection mechanism 4 away from mutual inductor tester 5.

[0026] In the specific implementation process, first, the staff directly places the current transformer on the fixed mechanism 3, and the fixed mechanism 3 can fix the current transformer of different sizes, and the position deviation or shaking during detection will not occur, then the rotating mechanism 2 inside structure is started to drive the current transformer to rotate, so that the secondary side winding of the current transformer faces the detection mechanism 4, then the driving structure inside the detection mechanism 4 is started to make the detection assembly inside it lift to align the secondary side winding for detection, then the detection result is transmitted to the display screen of the mutual inductor tester 5 through the connecting line 6.

[0027] Specifically, in order to achieve the purpose of fixing the current transformer, with reference to Figure 3 In the scheme, the fixed mechanism 3 includes a support box 31 rotatably connected to the inner cavity of the annular groove 23, and the inner cavity of the support box 31 is provided with an air bag 33, a plurality of holes 32 are formed in the upper end of the support box 31, a plurality of support columns 34 are slidably connected in the inner cavities of the holes 32, and a plurality of ball blocks 35 are fixedly connected to the lower ends of the support columns 34.

[0028] In the above, the current transformer is directly placed on the upper end of the support column 34, so that the gravity of the current transformer is transmitted to the air bag 33 through the support column 34, and then the support column 34 in contact with the current transformer extrudes the air bag 33 downward, so that the air pressure in the inner cavity of the air bag 33 disperses and pushes the support columns 34 not in contact with the current transformer upward, thereby adapting the shape of the current transformer to the support columns 34, thereby achieving the purpose of fixation.

[0029] Further, in order to achieve the purpose of rotating the current transformer, with reference to Figure 2 In the scheme, the rotating mechanism 2 includes a support frame 21 fixedly connected to the middle part of the lower end of the test table 1, a fixed plate 22 fixedly connected to the middle part of the upper end of the test table 1, an annular groove 23 formed in the upper end of the fixed plate 22 away from the axis thereof, a worm gear 24 rotatably connected to the upper end middle part of the support frame 21, the outer surface of the worm gear 24 is meshingly connected with a worm 26, and a motor 25 is fixedly connected to the front right side of the upper end of the support frame 21.

[0030] Further, the upper end of the worm gear 24 penetrates the lower end of the test table 1 and the lower end of the fixed plate 22 and extends to the outside, and the output end of the motor 25 is fixedly connected with the right end of the worm 26 through a shaft coupling.

[0031] Further, the upper end of the worm gear 24 is fixedly connected to the middle part of the lower end of the support box 31.

[0032] In the above, the motor 25 drives the worm 26 to rotate, the worm 26 drives the worm gear 24 engaged with the worm 26 to rotate, and then the worm gear 24 drives the support box 31 to slide in the inner cavity of the annular groove 23, thereby achieving the purpose of rotating the current transformer.

[0033] The specific installation mode of the motor 25, the connection mode of the circuit and the control method are all conventional designs, and the utility model will not be described in detail.

[0034] In order to achieve the purpose of detecting the current transformer, referring to Figure 4 In the scheme, the detection mechanism 4 includes a fixed box 41 fixedly connected to the rear side of the upper end of the test table 1, a lead screw 44 rotatably connected to the middle part of the upper wall of the inner cavity of the fixed box 41 on the left side and the right side, a motor 42 fixedly connected to the left side of the bottom wall of the fixed box 41, a gear set 45 fixedly connected to the lower end of the two lead screws 44, a sliding block 46 threadedly connected to the outer surface of the two lead screws 44, a fixed box 47 fixedly connected between the opposite surfaces of the two sliding blocks 46, an electric telescopic rod 48 fixedly connected to the middle part of the inner cavity of the fixed box 47, and a detection head 49 fixedly connected to the output end of the electric telescopic rod 48.

[0035] Further, the two gear sets 45 are each composed of two vertical and horizontal meshing conical gears, the middle part of the two vertical conical gears is fixedly connected with a rotating rod 43, and the output end of the motor 42 is fixedly connected to the left end of the rotating rod 43 through a shaft coupling.

[0036] In the above, the motor 42 can drive the two lead screws 44 to rotate through the action of the conical gears and the rotating rod 43, then the sliding blocks 46 are lifted through the two lead screws 44, then the fixed box 47 is lifted to a position parallel to the secondary side winding of the current transformer through the sliding blocks 46, and then the electric telescopic rod 48 is started to push the detection head 49 forward to contact the secondary side winding for detection.

[0037] The specific installation mode of the electric telescopic rod 48, the connection mode of the circuit and the control method are all conventional designs, and the utility model will not be described in detail.

[0038] It needs to be specially pointed out that the specific installation mode of the motor two 42, the connection mode of the circuit and the control method all belong to the conventional design, and the utility model will not be described in detail.

[0039] The working principle of the utility model is: first, the current transformer is placed on the fixing mechanism 3 by the staff, the fixing mechanism 3 can fix the transformer of different sizes, and the position deviation or shaking in the detection process will not occur, then the rotating mechanism 2 inside structure is started to drive the transformer to rotate, the secondary side winding of the transformer is towards the detection mechanism 4, then the driving structure inside the detection mechanism 4 is started to make the detection assembly inside it lift and align the secondary side winding to detect, then the detection result is transmitted to the display screen of the transformer tester 5 through the connecting line 6.

[0040] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above.The skilled person in the art should understand that the utility model is not limited by the above examples, and the above examples and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A current transformer detection device comprising a test bench (1), characterized in that: The upper end of the test platform (1) is fixedly connected with a rotating mechanism (2), the upper end of the rotating mechanism (2) is rotatably connected with a fixing mechanism (3), the upper end of the test platform (1) is fixedly connected with a detection mechanism (4) at the rear side, the upper end of the test platform (1) is fixedly connected with a mutual inductor tester (5) at the left rear side, the lower right end of the mutual inductor tester (5) is fixedly connected with a connecting line (6), and the end of the connecting line (6) away from the mutual inductor tester (5) is fixedly connected to the front of the detection mechanism (4).

2. The current transformer detection device of claim 1, wherein: The rotating mechanism (2) comprises a supporting frame (21) and a fixed plate (22), the supporting frame (21) is fixedly connected to the lower end of the test platform (1), the fixed plate (22) is fixedly connected to the upper end of the test platform (1), the upper end of the fixed plate (22) is provided with an annular groove (23) on the side away from the axis, the upper end of the supporting frame (21) is rotatably connected with a worm gear (24), the outer surface of the worm gear (24) is meshingly connected with a worm (26) at the front side, and the upper end of the supporting frame (21) is fixedly connected with a motor (25) at the right front side.

3. The current transformer detection device of claim 2, wherein: The upper end of the worm gear (24) penetrates the lower end of the test platform (1) and the lower end of the fixed plate (22) and extends to the outside, and the output end of the motor (25) is fixedly connected with the right end of the worm (26) through a shaft coupling.

4. The current transformer detection device of claim 2, wherein: The fixing mechanism (3) comprises a supporting box (31), the supporting box (31) is rotatably connected in the inner cavity of the annular groove (23), the inner cavity of the supporting box (31) is provided with an air bag (33) on the bottom wall, a plurality of holes (32) are arranged in the annular array on the upper end of the supporting box (31), a plurality of supporting columns (34) are slidably connected in the inner cavities of the holes (32), and the lower ends of the supporting columns (34) are fixedly connected with a plurality of ball blocks (35).

5. The current transformer detection device of claim 3, wherein: The upper end of the worm gear (24) is fixedly connected to the lower end of the supporting box (31).

6. The current transformer detection device of claim 1, wherein: The detection mechanism (4) comprises a fixed box (41), the fixed box (41) is fixedly connected to the upper end of the test platform (1), the inner cavity of the fixed box (41) is rotatably connected with a lead screw (44) at the left side of the middle of the upper wall, the bottom wall of the fixed box (41) is fixedly connected with a motor (42) at the left side, the lower ends of the two lead screws (44) are fixedly connected with a gear set (45), the outer surfaces of the two lead screws (44) are threadedly connected with a sliding block (46), the opposite faces of the two sliding blocks (46) are fixedly connected with a fixed box (47), the inner cavity of the fixed box (47) is fixedly connected with an electric telescopic rod (48) at the middle, and the output end of the electric telescopic rod (48) is fixedly connected with a detection head (49).

7. A current transformer detection device according to claim 6, characterised in that: The two gear sets (45) are each composed of two vertical and horizontal meshing conical gears, the middle of the two vertical conical gears is fixedly connected with a rotating rod (43), and the output end of the motor (42) is fixedly connected to the left end of the rotating rod (43) through a shaft coupling.

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