Transformer short circuit test device

Abstract

The utility model belongs to the technical field of electric power detection, and discloses a transformer short circuit test device. Comprising a transformer body, one end of the transformer body is provided with a wiring pipe, one end of the transformer body is connected with a power line, the power line penetrates through the wiring pipe, one end of the transformer body is provided with a winding mechanism, the winding mechanism comprises a bobbin, and one end of the bobbin is provided with a mounting cylinder; a fixing plate is further installed at one end of the transformer body. According to the utility model, the winding mechanism is additionally arranged on the transformer, when the transformer is used, two deflector rods are rotated, a gear drives a toothed plate to push a sliding cylinder, and the sliding cylinder drives a positioning block and a limiting block to move, so that the positioning block is separated from a gear ring, the limiting of the sliding cylinder is relieved, and a tester can conveniently pull a power line; automatic storage of the power line is achieved, manual storage by a tester is not needed, and therefore the test operation time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power detection, and more specifically, to a transformer short-circuit test device. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil and the iron core (magnetic core). Its main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. The transformer short-circuit test is to measure data such as short-circuit loss and impedance voltage in order to assess the transformer's electrical performance such as efficiency, thermal stability, dynamic stability, and temperature rise.

[0003] When the transformer is short-circuited, wiring is required. The wiring harness is relatively long. When the wiring harness is stored, the test personnel need to store it manually, which is troublesome and increases the test operation time. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a transformer short-circuit test device.

[0005] To achieve the above object, the utility model provides the following technical solutions: a transformer short circuit test device, comprising a transformer body, one end of the transformer body is installed with a wiring tube, one end of the transformer body is connected with a power line, the power line passes through the wiring tube, and one end of the transformer body is provided with a winding mechanism;

[0006] The winding mechanism includes a bobbin, a mounting barrel is installed at one end of the bobbin, a fixing plate is also installed at one end of the transformer body, the mounting barrel is installed at one end of the fixing plate, a rotating hole is provided at one end where the bobbin and the mounting barrel are in contact, a winding tube is rotatably installed in the rotating hole, one end of the winding tube is elastically connected to the inner wall of the mounting barrel through a clockwork spring, a threading hole is provided at the lower end of the bobbin and is slidably connected to the power cord, the power cord is wound around the other end of the winding tube, and a limiting component is installed at the other end of the bobbin.

[0007] Furthermore, the limiting assembly includes a fixed cylinder with openings at both ends, the fixed cylinder is installed at the other end of the wire drum, an end where the fixed cylinder and the wire drum are in contact is provided with an opening, the other end of the winding tube is provided with a fixed block, one end of the fixed block is elastically connected to a sliding cylinder via a buffer spring, one end of the sliding cylinder is provided with a groove that is slidably connected to the fixed block, and the outer side of the sliding cylinder is slidably connected to the opening.

[0008] Furthermore, a rotating plate is rotatably mounted on the other end of the slide cylinder, a toothed plate is mounted on one end of the rotating plate, gears are meshed at the top and bottom of the toothed plate, the gears are rotatably connected to the inner wall of the fixed cylinder, and a lever is mounted on the outer side of the gear.

[0009] Furthermore, a placement groove is provided on the outer side of the slide cylinder, a positioning block is elastically connected to the inside of the placement groove through a limit spring, a limit block is installed at one end of the positioning block, and a gear ring is installed inside the fixed cylinder to slide and mesh with the outer side of the positioning block.

[0010] Furthermore, a fixing ring is installed inside the fixing cylinder, a bearing is installed on the inner wall of the fixing ring, a slot matching the size of the limit block is opened on the inner wall of the fixing ring, a slope is provided on the outer side of the limit block, and the inner ring of the bearing slides against the slope of the limit block.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: a winding mechanism is added to the transformer, and when in use, the two levers are rotated, and the gear drives the tooth plate to push the slide cylinder, and the slide cylinder drives the positioning block and the limit block to move, so that the positioning block is disengaged from the gear ring, and the limit of the slide cylinder is released, which makes it convenient for the test personnel to pull the power cord, and a clockwork spring is added. When the power cord is recovered, the power cord is automatically stored, and the test personnel do not need to store it manually, thereby reducing the test operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the overall internal structure of the fixed cylinder of the utility model;

[0014] Figure 3 It is a cross-sectional view of the internal structure of the wire drum, the installation drum and the fixing drum of the utility model;

[0015] Figure 4 For the utility model Figure 3 A magnified view of the structure in the middle.

[0016] In the figure:

[0017] 1. Transformer body; 2. Fixing plate; 3. Wiring tube; 4. Wire drum; 5. Mounting tube; 6. Winding tube; 7. Spring; 8. Fixing tube; 9. Fixing block; 10. Buffer spring; 11. Slide; 12. Turn plate; 13. Tooth plate; 14. Gear; 15. Push rod; 16. Limit spring; 17. Positioning block; 18. Limit block; 19. Gear ring; 20. Fixing ring; 21. Bearing. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The utility model provides the following technical solutions: a transformer short circuit test device, comprising a transformer body 1, a wiring tube 3 is installed at one end of the transformer body 1, a power line is connected to one end of the transformer body 1, and the power line passes through the wiring tube 3. A winding mechanism is provided at one end of the transformer body 1, and the winding mechanism comprises a bobbin 4, and a mounting tube 5 is installed at one end of the bobbin 4. A fixing plate 2 is also installed at one end of the transformer body 1, and the mounting tube 5 is installed at one end of the fixing plate 2. A rotating hole is opened at one end where the bobbin 4 and the mounting tube 5 are in contact, and a winding tube 6 is rotatably installed in the rotating hole. One end of the winding tube 6 is elastically connected to the inner wall of the mounting tube 5 through a spring spring 7, and a threading hole is opened at the lower end of the bobbin 4 and is slidably connected to the power line. The power line is wound around the other end of the winding tube 6, and the power line is stretched to drive the winding tube 6 to rotate, and the winding tube 6 drives the spring spring 7 to stretch, and the power line is loosened, and the winding tube 6 is reversely rotated by the spring spring 7, thereby realizing the automatic winding of the power line.

[0020] A limiting assembly is installed at the other end of the bobbin 4, and the limiting assembly includes a fixed barrel 8 with openings at both ends, the fixed barrel 8 is installed at the other end of the bobbin 4, and an opening is provided at one end where the fixed barrel 8 and the bobbin 4 are in contact, and a fixed block 9 is installed at the other end of the winding tube 6, one end of the fixed block 9 is elastically connected to a slide barrel 11 through a buffer spring 10, one end of the slide barrel 11 is provided with a groove that is slidably connected to the fixed block 9, and the outer side of the slide barrel 11 is slidably connected to the opening, the fixed block 9 and the buffer spring 10 play the role of limiting the slide barrel 11, thereby increasing the sliding stability of the slide barrel 11.

[0021] A rotating plate 12 is rotatably installed at the other end of the slide cylinder 11, and a tooth plate 13 is installed at one end of the rotating plate 12. The rotating plate 12 realizes the synchronous movement between the slide cylinder 11 and the tooth plate 13 without affecting the rotation of the slide cylinder 11. Gears 14 are meshed at the top and bottom of the tooth plate 13. The gear 14 is rotatably connected to the inner wall of the fixed cylinder 8. A lever 15 is installed on the outside of the gear 14. The lever 15 is located outside the opening of the fixed cylinder 8. The lever 15 is convenient for the tester to rotate the gear 14.

[0022] A placement groove is provided on the outer side of the slide 11, and a positioning block 17 is elastically connected to the inside of the placement groove through a limit spring 16. A limit block 18 is installed at one end of the positioning block 17, and a gear ring 19 is installed inside the fixed cylinder 8, which is slidably engaged with the outer side of the positioning block 17. A fixing ring 20 is also installed inside the fixed cylinder 8, and the inner wall of the fixing ring 20 is equipped with a bearing 21. The inner wall of the fixing ring 20 is also provided with a groove adapted to the size of the limit block 18. When the positioning block 17 is engaged with the gear ring 19, the limit block 18 is located in the groove of the inner wall of the fixing ring 20. At this time, the slide 11 cannot rotate, and an inclined surface is provided on the outer side of the limit block 18, and the inner ring of the bearing 21 slides against the inclined surface of the limit block 18. The inclined surface plays a role in reducing the sliding resistance between the limit block 18 and the inner rings of the fixing ring 20 and the bearing 21. When the slide 11 is moved conveniently, the limit block 18 slides into the inside of the placement groove, driving the positioning block 17 to slide, thereby releasing the limit of the positioning block 17.

[0023] Working principle: When the short circuit test needs to be plugged in, first turn the lever 15 in the direction close to the tooth plate 13, the lever 15 drives the gear 14 to rotate, the gear 14 drives the tooth plate 13 to slide, the tooth plate 13 drives the slide 11 to slide through the rotating plate 12, the slide 11 squeezes the buffer spring 10, and at the same time the slide 11 drives the positioning block 17 and the limiting block 18 to slide through the limiting spring 16, the inclined surface of the limiting block 18 is squeezed by the fixing ring 20 and the bearing 21 to slide toward the center of the slide 11, the limiting block 18 drives the positioning block 17 to squeeze the limiting spring 16, the positioning block 17 is out of contact with the gear ring 19, and the limiting block 18 is tightly fixed to the inner ring of the bearing 21, at this time, pull the power cord plug of the transformer body 1, and the power cord plug drives the winding tube 6 to rotate through the power cord. The winding tube 6 drives the clockwork spring 7 to stretch, and the winding tube 6 rotates through the fixed block 9, the buffer spring 10 and the slide 11. When the power cord is pulled to the required length, the lever 15 is rotated in the opposite direction, and the lever 15 drives the gear 14 to rotate in the opposite direction. The gear 14 drives the toothed plate 13 to slide, and the toothed plate 13 drives the slide 11 to slide in the opposite direction through the rotating plate 12. The slide 11 drives the positioning block 17 and the limit block 18 to slide in the opposite direction. The thrust of the limit spring 16 drives the limit block 18 to be stuck in the slot of the fixed ring 20, and the positioning block 17 is engaged and fixed with the gear ring 19. At this time, the power cord cannot be pulled. When the power cord needs to be stored, the above operation is repeated, the limit of the slide 11 is released, and the reverse rotation of the winding tube 6 is realized by the winding of the clockwork spring 7, thereby realizing the automatic storage of the power cord.

[0024] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0025] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A transformer short circuit test device, comprising a transformer body (1), characterized in that: A wiring tube (3) is installed at one end of the transformer body (1), a power line is connected to one end of the transformer body (1), the power line passes through the wiring tube (3), and a winding mechanism is provided at one end of the transformer body (1); The winding mechanism comprises a bobbin (4), one end of which is provided with a mounting barrel (5), one end of which is also provided with a fixing plate (2), the transformer body (1) being provided with a fixing plate (2), the mounting barrel (5) being provided with a rotating hole at one end of which the bobbin (4) and the mounting barrel (5) are in contact, a winding tube (6) being rotatably mounted in the rotating hole, one end of which is elastically connected to the inner wall of the mounting barrel (5) via a spring (7), a threading hole being provided at the lower end of the bobbin (4) and being slidably connected to a power cord, the power cord being wound around the other end of the winding tube (6), and a limiting assembly being provided at the other end of the bobbin (4).

2. A transformer short circuit test device according to claim 1, characterized in that: The limiting assembly comprises a fixed cylinder (8) with openings at both ends, the fixed cylinder (8) being mounted on the other end of the bobbin (4), an opening being provided at one end of the fixed cylinder (8) and the bobbin (4) being in contact with each other, a fixed block (9) being mounted on the other end of the winding tube (6), one end of the fixed block (9) being elastically connected to a slide cylinder (11) via a buffer spring (10), one end of the slide cylinder (11) being provided with a groove slidably connected to the fixed block (9), and the outer side of the slide cylinder (11) being slidably connected to the opening.

3. A transformer short circuit test device according to claim 2, characterized in that: A rotating plate (12) is rotatably mounted on the other end of the slide cylinder (11), a toothed plate (13) is mounted on one end of the rotating plate (12), a gear (14) is meshed at the top and bottom of the toothed plate (13), the gear (14) is rotatably connected to the inner wall of the fixed cylinder (8), and a lever (15) is mounted on the outer side of the gear (14).

4. A transformer short circuit test device according to claim 3, characterized in that: A placement groove is provided on the outer side of the slide cylinder (11), and a positioning block (17) is elastically connected to the inside of the placement groove via a limit spring (16). A limit block (18) is installed at one end of the positioning block (17), and a gear ring (19) is installed inside the fixed cylinder (8) and is slidably engaged with the outer side of the positioning block (17).

5. A transformer short circuit test device according to claim 4, characterized in that: A fixing ring (20) is also installed inside the fixing cylinder (8), and a bearing (21) is mounted on the inner wall of the fixing ring (20). A slot matching the size of the limit block (18) is also opened on the inner wall of the fixing ring (20). An inclined surface is provided on the outer side of the limit block (18), and the inner ring of the bearing (21) is in sliding contact with the inclined surface of the limit block (18).

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