A multi-channel automatic calibrator for current transformers

Abstract

The utility model relates to the technical field of transformers, and specifically to a multi-channel automatic calibrator for current transformers, comprising a workbench, a host computer arranged on the workbench, a button, an indicator light and a cooling fan, a calibration module arranged in the workbench and a calibration tool arranged on the workbench, wherein the host computer is electrically connected to the button, the indicator light, the calibration module and the cooling fan respectively, and the calibration tool comprises a seat body fixed on the workbench, a long groove arranged on the seat body, a plurality of positioning grooves arranged in the bottom of the long groove, a plurality of partitions arranged in the long groove and a plurality of ring-avoiding grooves arranged on one side wall of the long groove, wherein each group of positioning grooves and ring-avoiding grooves are respectively located between the partitions and between the partitions and the inner walls at both ends of the long groove. The design can place a plurality of transformers for calibration at the same time, separate and limit a plurality of transformers, make wiring more convenient, and greatly improve the calibration efficiency of transformers.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, in particular to a multi-channel automatic calibration instrument for current mutual inductors. Background Art

[0002] The transformer calibrator is a multifunctional and dual-parameter AC measuring instrument, which is mainly used to calibrate the basic errors of various types and levels of power transformers or instrument transformers and their ancillary equipment, and can perform multifunctional performance tests on related electrical metering equipment. The transformer calibrator is one of the important equipment indispensable for the development of the power industry.

[0003] During calibration, the standard transformer and the transformer to be calibrated are connected to the transformer calibrator at the same time. Each transformer can only be wired one by one, and the position of the transformer cannot be fixed. It is easy to roll when vibrated or touched by mistake, which affects the calibration accuracy and is prone to danger. In addition, due to the large number of wiring and the complexity of wiring, wiring errors and poor wiring contact are prone to occur, which ultimately leads to very low calibration efficiency and accuracy. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a current transformer multi-channel automatic calibrator, which can place multiple transformers for calibration at the same time, separate and limit multiple transformers, make wiring more convenient, and greatly improve the transformer calibration efficiency.

[0005] The technical solution adopted by the utility model is to provide a current transformer multi-channel automatic calibrator, including a workbench, a host computer arranged on the workbench, buttons, indicator lights and a cooling fan, a calibration module arranged in the workbench and a calibration tool arranged on the workbench, the host computer is electrically connected to the buttons, the indicator lights, the calibration module and the cooling fan respectively, and the calibration tool comprises a seat body fixed on the workbench, a long groove arranged on the seat body, a plurality of positioning grooves arranged in the bottom of the long groove, a plurality of partitions arranged in the long groove and a plurality of avoidance ring grooves arranged on one side wall of the long groove, and each group of positioning grooves and avoidance ring grooves are respectively located between the partitions and between the partitions and the inner walls at both ends of the long groove.

[0006] The workbench includes a lower box body, a table top arranged at the upper end of the lower box body, and an upper box body arranged at the upper end of the table top. The width of the table top is greater than the width of the lower box body and the upper box body, and the rear end surfaces of the lower box body and the upper box body are flush. The host computer, buttons, indicator lights and verification module are all fixed on the front end surface of the upper box body, the cooling fan is fixed on the rear end surface of the upper box body, and the verification tooling is fixed on the upper end of the table top.

[0007] The inspection tool also includes an air passage slot arranged on the other side wall of the long slot, and the air passage slot and the ring avoidance slot are arranged alternately.

[0008] The air passage slot corresponds to the partition plate, one end of the partition plate is fixed to one side wall of the long slot, and the other end of the partition plate is spaced from the other side wall of the long slot.

[0009] The verification tool also includes a mounting platform arranged on the upper sides of both ends of the seat body, a lap groove arranged on the mounting platform and a primary connection rod mounted in the lap groove.

[0010] The calibration tooling also includes parallel pneumatic clamps arranged at both ends of the seat body, clamping seats respectively arranged on the two movable ends on the upper side of the parallel pneumatic clamps, and corresponding clamping grooves arranged on the opposite end surfaces of the clamping seats. The two movable ends of the parallel pneumatic clamps drive the clamping seats to move relative to each other, and the clamping grooves correspond to the overlapping grooves.

[0011] The beneficial effect of the utility model is that it provides a multi-channel automatic calibrator for current transformers, wherein the host computer is used for control and display, the on and off of the indicator light is used to display the current state, the button is used for switching, the cooling fan is used for heat dissipation, the calibration module is used for data processing, and the calibration tooling is used to place and limit the transformer. When in use, multiple transformers are placed in the long slot, and each transformer is separated by a partition. This design can separate and position multiple transformers, so that multiple transformers maintain the same posture and are uniformly arranged. When vibrated or accidentally touched, the posture and position will not change, ensuring the stability of the transformer during calibration, while wiring is more convenient, greatly improving the calibration efficiency and accuracy of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model

[0013] Figure 2 It is a structural schematic diagram of the utility model in another direction;

[0014] Figure 3 It is a structural schematic diagram of the utility model calibration tool;

[0015] Figure 4 It is a schematic diagram of the structure of the calibration tool of the utility model in another direction;

[0016] Figure 5 It is a structural reference diagram of the mutual inductor of the utility model.

[0017] In the accompanying drawings, 1. host computer, 2. button, 3. indicator light, 4. cooling fan, 5. calibration module, 6. calibration tooling, 7. base, 8. long slot, 9. positioning slot, 10. partition, 11. ring avoidance slot, 12. lower box, 13. table, 14. upper box, 15. air duct, 16. bridging table, 17. lap slot, 18. primary wiring rod, 19. parallel pneumatic clamp, 20. clamping table, 21. clamping slot, 22. puncture box, 23. puncture slider, 24. knob, 25. coil, 26. puncture needle. DETAILED DESCRIPTION

[0018] like Figure 1-5 As shown, the utility model provides a current transformer multi-channel automatic calibrator, including a workbench, a host computer 1 arranged on the workbench, a button 2, an indicator light 3 and a cooling fan 4, a calibration module 5 arranged in the workbench and a calibration tool 6 arranged on the workbench, the host computer 1 is electrically connected to the button 2, the indicator light 3, the calibration module 5 and the cooling fan 4 respectively, the calibration tool 6 includes a seat body 7 fixed on the workbench, a long groove 8 arranged on the seat body 7, a plurality of positioning grooves 9 arranged in the bottom of the long groove 8, a plurality of partitions 10 arranged in the long groove 8 and a plurality of groups of avoidance ring grooves 11 arranged on one side wall of the long groove 8, each group of positioning grooves 9 and avoidance ring grooves 11 are respectively located between the partitions 10 and between the partitions 10 and the inner walls at both ends of the long groove 8.

[0019] The host computer 1 is used for control and display, the indicator light 3 is used to display the current state, the button 2 is used for switching, the cooling fan 4 is used for heat dissipation, the verification module 5 is used for data processing, and the verification tool 6 is used to place and limit the mutual inductor.

[0020] The calibration tool 6 in the present design is mainly used for puncture power transformers, and its structure mainly includes a puncture box 22, a puncture slider 23 slidably arranged at the upper end of the puncture box 22, two knobs 24 arranged at the lower end of the puncture box 22, a coil 25 arranged at one side of the puncture box 22, and a puncture needle 26 arranged at the upper end of the puncture box 22. The two knobs 24 are respectively connected to the puncture needle 26 and the puncture slider 23 through a screw rod. By rotating the two knobs 24, the puncture needle 26 and the puncture slider 14 can be driven to rise and fall. The puncture slider 23 is a hook-shaped structure, and the coil 25 and the puncture slider 23 correspond in position.

[0021] The width of the long slot 8 is adapted to the length of the puncture box 22, the positioning slot 9 is adapted to the knob 24, the ring-avoiding slot 11 is adapted to the coil 25, and the space between the partitions 10 and the inner walls at both ends of the long slot 8 is adapted to the width of the puncture box 22. When in use, multiple mutual inductors are placed in the long slot 8, and each mutual inductor is separated by the partition 10. At this time, the puncture box 22 of the mutual inductor enters the long slot 8 and between the partitions 10, the knob 24 enters the positioning slot 9, and the outer side of the coil 25 enters the ring-avoiding slot 11, so that multiple mutual inductors can be positioned, so that multiple mutual inductors maintain the same posture and are uniformly arranged. When vibrated or accidentally touched, the posture and position will not change, thereby ensuring the stability of the mutual inductor during verification, while making wiring more convenient, and greatly improving the verification efficiency and accuracy of the mutual inductor.

[0022] like Figure 1-2As shown, the workbench includes a lower box body 12, a table top 13 arranged at the upper end of the lower box body 12, and an upper box body 14 arranged at the upper end of the table top 13. The width of the table top 13 is greater than the width of the lower box body 12 and the upper box body 14, and the rear end surfaces of the lower box body 12 and the upper box body 14 are flush. The host computer 1, button 2, indicator light 3 and verification module 5 are all fixed on the front end surface of the upper box body 14, the cooling fan 4 is fixed on the rear end surface of the upper box body 14, and the verification tooling 6 is fixed on the upper end of the table top 13.

[0023] The calibration tool 6 is fixed on the table 13, which is convenient for installing and placing the mutual inductor. The upper computer 1, button 2, indicator light 3 and calibration module 5 on the upper box 14 are convenient for viewing, operation and wiring. The cooling fan 4 is used for internal heat dissipation of the entire workbench. The lower box 12 is used for support and a vent is set on the rear end face of the lower box 12. The cooling fan 4 of the upper box 14 cooperates with the air circulation inside the workbench. The design is simple in structure, stable and easy to use.

[0024] like Figure 3-4 As shown, the calibration tool 6 further includes an air passage slot 15 arranged on the other side wall of the long slot 8, and the air passage slot 15 and the ring-avoiding slot 11 are alternately arranged.

[0025] The air duct 15 is located between the transformers and will not be blocked by the transformers, thereby ensuring the heat dissipation effect. In this design, the bottom of the air duct 15 is flush with the bottom of the long slot 8, further improving the heat dissipation and ventilation effect.

[0026] like Figure 3-4 As shown, the air passage 15 corresponds to the partition 10 , one end of the partition 10 is fixed to one side wall of the long slot 8 , and the other end is spaced from the other side wall of the long slot 8 .

[0027] The partition plate 10 faces the air slot 15 and will not block the ventilation of the air slot 15. Moreover, one air slot 15 can bring air into two mutual inductor positions, further improving the ventilation and heat dissipation effect.

[0028] like Figure 3-4 As shown, the calibration tool 6 also includes a mounting platform 16 arranged on the upper sides of both ends of the base body 7, a lap groove 17 arranged on the mounting platform 16 and a primary connection rod 18 mounted in the lap groove 17.

[0029] Both ends of the primary wiring rod 18 are overlapped in the overlap groove 17, and one primary wiring rod 18 passes through the coils 25 of multiple transformers placed in the long groove 8. The primary side of the verification module 5 only needs to connect the two ends of the primary wiring rod 18, which reduces the number of wiring and the amount of wiring operations during verification, further improving the verification efficiency and operational convenience of the transformer.

[0030] like Figure 4As shown, the calibration tool 6 also includes parallel pneumatic clamps 19 arranged at both ends of the base body 7, clamping seats 20 respectively arranged on the two movable ends on the upper side of the parallel pneumatic clamps 19, and corresponding clamping grooves 21 arranged on the opposite end surfaces of the clamping seats 20. The two movable ends of the parallel pneumatic clamps 19 drive the clamping seats 20 to move relative to each other, and the clamping grooves 21 correspond to the overlapping grooves 17.

[0031] The parallel pneumatic clamp 19 is a two-claw clamp, and the clamp is movable in translation, driving the clamping seat 20 to move relatively in translation, clamping the primary wiring rod 18 in the clamping groove 21, clamping and fixing the primary wiring rod 18, so that the position of the primary wiring rod 18 will not change after being stressed, ensuring stable wiring, safe use, and more convenient wiring.

Claims

1. A current transformer multi-channel automatic calibrator, characterized in that: The invention comprises a workbench, a host computer (1) arranged on the workbench, a button (2), an indicator light (3) and a cooling fan (4), a verification module (5) arranged in the workbench and a verification tool (6) arranged on the workbench, wherein the host computer (1) is electrically connected to the button (2), the indicator light (3), the verification module (5) and the cooling fan (4) respectively, and the verification tool (6) comprises a seat body (7) fixed on the workbench, a long groove (8) arranged on the seat body (7), a plurality of groups of positioning grooves (9) arranged in the bottom of the long groove (8), a plurality of partitions (10) arranged in the long groove (8) and a plurality of groups of ring-avoiding grooves (11) arranged on one side wall of the long groove (8), wherein each group of positioning grooves (9) and ring-avoiding grooves (11) are respectively located between the partitions (10) and between the partitions (10) and the inner walls at both ends of the long groove (8).

2. A current transformer multi-channel automatic calibrator according to claim 1, characterized in that: The workbench comprises a lower box (12), a tabletop (13) arranged at the upper end of the lower box (12), and an upper box (14) arranged at the upper end of the tabletop (13); the width of the tabletop (13) is greater than the widths of the lower box (12) and the upper box (14), and the rear end surfaces of the lower box (12) and the upper box (14) are flush; the upper computer (1), the button (2), the indicator light (3) and the calibration module (5) are all fixed on the front end surface of the upper box (14); the cooling fan (4) is fixed on the rear end surface of the upper box (14); and the calibration tool (6) is fixed on the upper end of the tabletop (13).

3. The current transformer multi-channel automatic calibrator according to claim 1, characterized in that: The calibration tool (6) further comprises an air passage slot (15) arranged on the other side wall of the long slot (8), wherein the air passage slot (15) and the ring avoidance slot (11) are arranged alternately.

4. A current transformer multi-channel automatic calibrator according to claim 3, characterized in that: The air passage slot (15) corresponds to the partition plate (10), one end of the partition plate (10) is fixed to one side wall of the long slot (8), and the other end is spaced from the other side wall of the long slot (8).

5. The current transformer multi-channel automatic calibrator according to claim 1, characterized in that: The calibration tool (6) further comprises a mounting platform (16) arranged on the upper sides of both ends of the base body (7), a lap groove (17) arranged on the mounting platform (16), and a primary connection rod (18) mounted in the lap groove (17).

6. A current transformer multi-channel automatic calibrator according to claim 5, characterized in that: The calibration tool (6) further comprises parallel pneumatic clamps (19) arranged at both ends of the seat body (7), clamping seats (20) respectively arranged on the two movable ends on the upper side of the parallel pneumatic clamps (19), and corresponding clamping grooves (21) arranged on the opposite end surfaces of the clamping seats (20), wherein the two movable ends of the parallel pneumatic clamps (19) drive the clamping seats (20) to move relative to each other, and the clamping grooves (21) correspond to the overlapping grooves (17).

Images