On-off testing device for PT semi-finished products of voltage transformers

Abstract

The utility model belongs to the technical field of mutual inductor detection, and particularly relates to a potential transformer PT semi-finished product on-off testing device which comprises a workbench and a probe, a moving assembly is arranged on the workbench, the moving assembly comprises a supporting frame and a lifting air cylinder, and the supporting frame stretches across the workbench. The fixed end of the lifting air cylinder is fixedly connected with the supporting frame, the probe is hung above the workbench through the telescopic end of the lifting air cylinder, and the probe has the freedom degree of lifting in the vertical direction through the lifting air cylinder and makes contact with pins of the voltage transformer below the probe. According to the utility model, the moving assembly is additionally arranged, and the moving assembly is used for controlling the lifting and translation of the probe, so that the probe can be in contact with the pins of the mutual inductor on the workbench, the tedious operation that the detector is manually held by a hand to sequentially contact with the pins is avoided, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of transformer testing technology, specifically relating to a continuity testing device for PT-type semi-finished voltage transformers. Background Technology

[0002] After the production of PT-type voltage transformer semi-finished products, continuity tests are required to identify defective products, ensure product quality, and ensure that the voltage transformers can work normally.

[0003] Continuity testers are already available on the market. They are used to test a voltage transformer by contacting two probes on the tester that correspond to the positive and negative terminals with a set of pins. If the transformer windings are connected normally and the current can pass through the transformer and form a circuit, the indicator on the continuity tester will indicate that the transformer is normal.

[0004] However, current continuity testers require operators to hold probes and make contact with the pins of the transformer, resulting in low testing efficiency and making them unsuitable for testing large quantities of PT-type semi-finished voltage transformers. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a continuity testing device for PT-type semi-finished voltage transformers. By adding a moving assembly, the device controls the lifting and translation of the probe, enabling the probe to contact the transformer pins on the workbench. This avoids the tedious operation of manually holding the tester and contacting the pins one by one, thus improving testing efficiency.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] A voltage transformer (PT type) semi-finished product continuity and disconnection testing device includes a workbench and a probe. A movable assembly is provided on the workbench. The movable assembly includes a support frame spanning above the workbench and a lifting cylinder. The fixed end of the lifting cylinder is fixedly connected to the support frame. The probe is suspended above the workbench by means of the telescopic end of the lifting cylinder. The probe has the freedom to move up and down in the vertical direction by means of the lifting cylinder and touches the pins of the voltage transformer below the probe.

[0008] The workbench is also equipped with a movable plate, which is arranged horizontally along the X-axis parallel to the support frame. The lifting cylinders are symmetrically arranged on both sides of the support frame, and the extension and retraction ends of the lifting cylinders on both sides are fixedly connected to the two sides of the movable plate. Multiple sets of probes are arranged at intervals along the X-axis on the movable plate.

[0009] The moving assembly further includes a horizontal slide rail, a driving screw, and a motor disposed on the workbench. The horizontal slide rail is arranged in the horizontal direction of the Y-axis perpendicular to the support frame. The driving screw is arranged parallel to the horizontal slide rail and has the freedom of rotation by means of the motor. The horizontal slide rails are symmetrically arranged on both sides of the support frame. Both sides of the support frame are respectively in sliding fit with the horizontal slide rails by means of sliders. A nut sleeve in threaded fit with the driving screw is further arranged on the support frame. The support frame has the freedom of intermittent movement in the horizontal direction of the Y-axis by means of the cooperation of the driving screw and the nut sleeve.

[0010] The on-off test device further includes a positioning box. A positioning groove for placing the mutual inductor is arranged in the positioning box. Multiple groups of the positioning grooves are arranged in a rectangular array in the positioning box. The pins of the mutual inductor are arranged in a rectangular array by means of the positioning box. The distance between adjacent pins in the X-axis direction is equal to the distance between adjacent probes on the moving plate. The distance between adjacent pins in the Y-axis direction is equal to the single moving distance of the support frame in the horizontal direction.

[0011] The surface of the workbench is provided with a first positioning baffle in the X-axis direction and a second positioning baffle in the Y-axis direction. The second positioning baffle is symmetrically arranged at both ends of the first positioning baffle and is arranged in a "冂" shape. The periphery of the positioning box abuts against the first positioning baffle and the second positioning baffle to form positioning.

[0012] The probe includes a power supply part, a telescopic part, and a contact part. The top end of the telescopic part is connected to the power supply part by means of a telescopic spring. The bottom end of the telescopic part is connected to the contact part. Multiple groups of telescopic holes are arranged at intervals in the X-axis direction on the moving plate. The telescopic part is located in the telescopic hole and has the freedom of floating up and down along the telescopic hole by means of the telescopic spring.

[0013] The contact area of the contact end of the contact part is larger than the contact area of the pin.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. By adding a moving assembly, the present utility model controls the lifting and translation of the probe of the on-off tester by means of the moving assembly, so that the probe can touch the pins of the mutual inductor on the workbench, eliminating the need for staff to hold the probe of the tester to contact the pins of the mutual inductor, reducing the workload of the staff, and improving the detection efficiency.

[0016] 2. Since it is impossible to ensure that the height of each pin exposed outside the mutual inductor is exactly the same during the preparation process, there are certain inevitable errors. The inconsistent height of the row of pins will cause poor contact of some pins, affecting the accuracy of detection, and excessive descent of the probe may cause the higher pins to be pressed and damaged.

[0017] Therefore, the probe in the utility model adopts telescopic structure, the setting of telescopic spring makes the probe be able to adaptively adjust according to the height of pin when contacting with the pin, thereby avoiding the above problems, and improving the accuracy and safety of detection. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model;

[0019] Figure 2 It is a top view of the utility model;

[0020] Figure 3 It is a top view of the utility model after removing the support frame and probe;

[0021] Figure 4 It is a sectional structure schematic view of the moving plate;

[0022] Figure 5 It is a top view structure schematic view of the mutual inductor;

[0023] In the drawings, 1, workbench, 2, probe, 3, support frame, 4, lifting cylinder, 5, pin, 6, moving plate, 7, horizontal slide rail, 8, drive screw, 9, motor, 10, sliding block, 11, screw sleeve, 12, positioning box, 13, positioning groove, 14, first positioning baffle, 15, telescopic spring, 16, telescopic hole, 17, second positioning baffle, 201, power supply part, 202, telescopic part, 203, contact point part. DETAILED DESCRIPTION

[0024] The utility model will be further described in connection with the drawings and specific embodiments:

[0025] Specific embodiments, such as Figures 1-5 As shown in the voltage transformer PT class semi-finished product on-off test device, including workbench 1 and probe 2, the workbench 1 is provided with moving assembly, the moving assembly includes the support frame 3 that straddles the workbench 1 upper and lifting cylinder 4, the fixed end of lifting cylinder 4 is fixedly connected with support frame 3, the probe 2 is suspended in the workbench 1 upper by the telescopic end of lifting cylinder 4, and the probe 2 has the freedom of vertical direction lifting by lifting cylinder 4 and contacts the pin 5 of the voltage transformer below the probe 2.

[0026] At present, there is on-off tester on the market, which detects by contacting two probes 2 corresponding to the positive and negative poles on the on-off tester with a group of pins 5 of the voltage transformer, if the winding connection of the mutual inductor is normal, the current can pass through the mutual inductor and form a loop, and the indicator of the on-off tester will prompt that the mutual inductor is normal. However, the current on-off tester needs the staff to hold the probe 2 and contact with the pin 5 of the mutual inductor, the test efficiency is low, and it cannot adapt to the test of large quantities of voltage transformer PT class semi-finished products.

[0027] Therefore, the utility model discloses that the mobile assembly is additionally arranged, the probe 2 of on-off tester is controlled to go up and down by mobile assembly, makes the probe 2 can touch the mutual inductor pin 5 on the workbench 1, avoids the cumbersome operation of the staff's hand-held tester's probe 2 contact mutual inductor's pin 5, reduces the work load of staff, improves the detection efficiency.

[0028] The workbench 1 is also provided with a moving plate 6, the moving plate 6 is arranged along the X-axis horizontal direction parallel to the support frame 3, the lifting cylinder 4 is symmetrically arranged on both sides of the support frame 3, the telescopic ends of the lifting cylinders 4 on both sides are fixedly connected with both sides of the moving plate 6 respectively, and the probes 2 are arranged in multiple groups along the X-axis direction on the moving plate 6.

[0029] The test device of the utility model is also provided with the moving plate 6, and multiple groups of probes 2 are arranged in the X-axis direction on the moving plate 6, when in use, the mutual inductors are first arranged neatly along the X-axis direction, then placed below the probes 2, and then the lifting cylinder 4 is controlled to descend, and the moving plate 6 can detect multiple pins 5 simultaneously through one lifting action, and the detection efficiency is further improved. The lifting cylinders 4 symmetrically arranged on both sides ensure the stability of the lifting of the moving plate 6.

[0030] The mobile assembly further includes a horizontal sliding rail 7 arranged on the workbench 1, a driving screw 8 and a motor 9, the horizontal sliding rail 7 is arranged along the Y-axis horizontal direction perpendicular to the support frame 3, the driving screw 8 is arranged parallel to the horizontal sliding rail 7 and has the freedom of rotation by means of the motor 9, the horizontal sliding rail 7 is symmetrically arranged on both sides of the support frame 3, the support frame 3 is slidably connected with the horizontal sliding rail 7 by means of the sliding block 10 on both sides, the support frame 3 is further provided with a screw sleeve 11 threadedly connected with the driving screw 8, and the support frame 3 has the freedom of intermittent movement along the Y-axis horizontal direction by means of the cooperation between the driving screw 8 and the screw sleeve 11. Through the arrangement of the horizontal sliding rail 7, the driving screw 8 and the motor 9, the support frame 3 can move intermittently along the Y-axis horizontal direction, so as to drive the moving plate 6 and the probes 2 to move along the Y-axis direction, and in cooperation with the multiple probes 2 along the X-axis direction, the pins 5 arranged in a matrix can be tested in turn, when in use, the staff first arranges the mutual inductors neatly along the XY-axis direction in a rectangular matrix, and then places the mutual inductors on the workbench 1, the probes 2 are lowered for the first time and contact the pins 5 in the first row, the probes 2 are raised under the action of the lifting cylinder 4 after the first row of pins 5 is tested, then the motor 9 is rotated for several turns, so that the moving plate 6 and the probes 2 move along the Y-axis direction by one unit distance, and reach above the second row of pins 5, at this time, the probes 2 are lowered for the second time and contact the pins 5 in the second row for testing, and the test device in the utility model can perform on-off test on multiple mutual inductors, and the detection efficiency is further improved.

[0031] As Figures 2-3As shown in the figure, the on-off test device further includes a positioning box 12. A positioning groove 13 for placing the mutual inductor is provided inside the positioning box 12. Multiple groups of the positioning grooves 13 are arranged in a rectangular array inside the positioning box 12. The pins 5 of the mutual inductor are arranged in a rectangular array by means of the positioning box 12. The distance between adjacent pins 5 in the X-axis direction is equal to the distance between adjacent probes 2 on the moving plate 6. The distance between adjacent pins 5 in the Y-axis direction is equal to the single moving distance of the support frame 3 in the horizontal direction. The setting of the positioning box 12 facilitates the placement and positioning of the mutual inductor, enables the pins 5 of the mutual inductor to be arranged in a rectangular array, and matches the layout of the probes 2 and the moving distance of the support frame 3, ensuring that each time the probe 2 descends, it can accurately contact the pin 5, and improving the accuracy of detection.

[0032] As Figure 3 shown in the figure, a first positioning baffle 14 in the X-axis direction and a second positioning baffle 17 in the Y-axis direction are provided on the surface of the workbench 1. The second positioning baffle 17 is symmetrically arranged at both ends of the first positioning baffle 14 and is arranged in a "冂" shape. The periphery of the positioning box 12 abuts against the first positioning baffle 14 and the second positioning baffle 17 to form a positioning. The first positioning baffle 14 and the second positioning baffle 17 jointly surround the positioning box 12, ensuring the accurate position of the positioning box 12 on the workbench 1 and avoiding misalignment during the placement of the positioning box 12, which may affect the accuracy of detection.

[0033] As Figure 4 shown in the figure, the probe 2 includes a power supply part 201, a telescopic part 202 and a contact part 203. The top end of the telescopic part 202 is connected to the power supply part 201 by means of a telescopic spring 15. The bottom end of the telescopic part 202 is connected to the contact part 203. Multiple groups of telescopic holes 16 are arranged at intervals in the X-axis direction on the moving plate 6. The telescopic part 202 is located in the telescopic holes 16 and has the freedom to float up and down along the telescopic holes 16 by means of the telescopic spring 15. Since it is impossible to ensure that the height of each pin 5 exposed outside the mutual inductor is exactly the same during the preparation process, there are certain inevitable errors. The inconsistent height of the row of pins 5 will cause poor contact of some pins 5 and affect the accuracy of detection. And if the probe 2 descends too much, it may cause the higher pins 5 to be pressed and damaged. Therefore, the probe 2 in the present utility model adopts a telescopic structure. The setting of the telescopic spring 15 enables the probe 2 to be adaptively adjusted according to the height of the pin 5 when contacting the pin 5, thereby avoiding the above problems and improving the accuracy and safety of detection.

[0034] Among them, the power supply part 201 is connected to the indicator of the on-off tester by means of a wire. The telescopic spring 15 is made of copper material and has good electrical conductivity.

[0035] As Figure 2As shown, the contact area of ​​the contact portion 203 is larger than the contact area of ​​the pin 5. Because the contact area of ​​the contact portion 203 is larger, it can be ensured that after the probe 2 descends, the top of the pin 5 will always be within the range of the contact portion 203, thus improving the reliability of the detection.

Claims

1. A voltage transformer (PT) class semi-finished product on-off test device comprising a workbench (1) and a probe (2), characterized in that, A moving assembly is provided on the workbench (1). The moving assembly includes a support frame (3) spanning above the workbench (1) and a lifting cylinder (4). The fixed end of the lifting cylinder (4) is fixedly connected to the support frame (3). The probe (2) is suspended above the workbench (1) by means of the telescopic end of the lifting cylinder (4). The probe (2) has a degree of freedom to lift and lower in the vertical direction by means of the lifting cylinder (4) and touches the pin (5) of the voltage transformer below the probe (2).

2. The PT class semi-finished product on-off test device of claim 1, wherein, A moving plate (6) is further provided on the workbench (1). The moving plate (6) is arranged in the horizontal X-axis direction parallel to the support frame (3). The lifting cylinders (4) are symmetrically arranged on both sides of the support frame (3). The telescopic ends of the lifting cylinders (4) on both sides are respectively fixedly connected to both sides of the moving plate (6). Multiple groups of the probes (2) are arranged at intervals in the X-axis direction on the moving plate (6).

3. The PT class semi-finished product on-off test device of claim 2, wherein, The moving assembly further includes a horizontal slide rail (7), a driving screw (8), and a motor (9) provided on the workbench (1). The horizontal slide rail (7) is arranged in the horizontal Y-axis direction perpendicular to the support frame (3). The driving screw (8) is arranged parallel to the horizontal slide rail (7) and has a degree of freedom to rotate by means of the motor (9). The horizontal slide rails (7) are symmetrically arranged on both sides of the support frame (3). Both sides of the support frame (3) are respectively in sliding fit with the horizontal slide rail (7) by means of sliders (10). A nut sleeve (11) in threaded fit with the driving screw (8) is further provided on the support frame (3). The support frame (3) has a degree of freedom to intermittently move in the horizontal Y-axis direction by means of the cooperation of the driving screw (8) and the nut sleeve (11).

4. The PT class semi-finished product on-off test device of claim 3, wherein, The on-off test device further includes a positioning box (12). A positioning groove (13) for placing the transformer is provided in the positioning box (12). Multiple groups of the positioning grooves (13) are arranged in a rectangular array in the positioning box (12). The pins (5) of the transformer are arranged in a rectangular array by means of the positioning box (12). The distance between adjacent pins (5) in the X-axis direction is equal to the distance between adjacent probes (2) on the moving plate (6). The distance between adjacent pins (5) in the Y-axis direction is equal to the single moving distance of the support frame (3) in the horizontal direction.

5. The PT class semi-finished product on-off test device according to claim 4, characterized in that, A first positioning baffle (14) in the X-axis direction and a second positioning baffle (17) in the Y-axis direction are provided on the surface of the workbench (1). The second positioning baffle (17) is symmetrically arranged at both ends of the first positioning baffle (14) and is arranged in a "冂” shape. The periphery of the positioning box (12) abuts against the first positioning baffle (14) and the second positioning baffle (17) to form positioning.

6. The PT class semi-finished product on-off test device of claim 2, wherein, The probe (2) comprises a power supply part (201), an extension part (202) and a contact part (203), the top end of the extension part (202) is connected with the power supply part (201) by means of an extension spring (15), the bottom end of the extension part (202) is connected with the contact part (203), a plurality of sets of extension holes (16) are arranged on the moving plate (6) in the X-axis direction, the extension part (202) is located in the extension hole (16) and has the freedom of floating up and down along the extension hole (16) by means of the extension spring (15).

7. The PT class semi-finished product on-off test device according to claim 6, characterized in that, The contact end area of the contact part (203) is greater than the contact end area of the needle pin (5).

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