Transformer transformation ratio tester

Abstract

The utility model is suitable for the technical field of transformer testing, and provides a transformer transformation ratio tester which is provided with a groove and a winding and unwinding mechanism, because one end of each jointing clamp is always connected with the tester, when the tester needs to be used, a plurality of jointing clamps in the groove are taken out, and a lead is pulled out of a shell, so that the tester can be used for testing the transformation ratio of a transformer. The winding unit can wind the wire in the machine shell again and place the jointing clamp in the groove again after the test is finished, and compared with the prior art that the two ends of the wire need to be connected, certain connection steps are omitted, the test efficiency is improved, and in addition, under the action of the winding mechanism, the testing efficiency is improved. The wire is not excessively exposed out of the machine shell, the phenomenon that the wire is wound in the winding process is also avoided, and arrangement of workers is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer testing, in particular to a transformer ratio tester. Background Art

[0002] During the transformer assembly process, the use of a transformer ratio tester can discover some assembly problems, check out the tap lead assembly problems, and measure the transformation ratio of the main connection and tap of the power transformer before installation and after repair to ensure that the electrical and mechanical performance of the transformer meets national standards and design requirements.

[0003] When using a transformer ratio tester, six wires are usually required to connect the instrument to the high-voltage and low-voltage sides of the transformer. In actual operation, the staff needs to connect the two ends of the wires and disassemble and reel the wires after the test. The entire testing process is cumbersome, which affects the testing efficiency of the transformer. In addition, when using longer wires, the longer wires are prone to entanglement during the storage process. Therefore, it is necessary to design corresponding technical solutions to solve the existing technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a transformer ratio tester to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A transformer ratio tester comprises a casing, a switch button and an operation screen are arranged on the front of the casing, a groove is arranged on the side of the casing, a plurality of through holes are opened in the groove, a wire is passed through the through holes, a wiring clamp is arranged in the groove corresponding to the plurality of through holes, the wiring clamp is arranged in the groove through a magnetic attraction component, one end of the wire is connected to the wiring clamp, and the other end is connected to a winding mechanism arranged in the casing, the winding mechanism comprises a support plate fixedly mounted in the casing and a plurality of winding rollers rotatably mounted between the support plate and the casing, the wire is wound on the winding roller, a winding unit is fixedly arranged on the support plate corresponding to the plurality of winding roller positions, and the winding unit is used to provide power for the reversal of the winding roller.

[0007] As a further solution of the utility model: the winding unit includes a hollow disk fixedly mounted on a support plate and a reset coil spring installed in the hollow disk, and the unwinding roller passes through the end of the hollow disk and is connected to the reset coil spring.

[0008] As a further solution of the utility model: a sliding cover is slidably arranged in the groove, and anti-slip grooves are arranged on the sliding cover.

[0009] As a further solution of the utility model: a brake assembly for limiting the movement of the wire is also arranged corresponding to multiple perforation positions in the casing, the brake assembly includes a limit clamp, a movable button, a spring and a push-pull rod, the limit clamp includes two cross-arranged connecting rods and a rotating shaft installed at the cross position, the rotating shaft is fixedly installed on the side wall of the casing, and clamping blocks are symmetrically fixed at the bottom of the sides of the two connecting rods. The movable button is movably installed on the top surface of the casing through a spring, and the bottom end of the movable button is respectively connected to the two connecting rods through push-pull rods, wherein one end of the push-pull rod is hingedly installed at the bottom of the movable button, and the other end is hinged to the connecting rod.

[0010] As a further solution of the utility model: an arc-shaped groove is opened on the clamping block, and a rubber pad is arranged in the arc-shaped groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides a groove and a winding and unwinding mechanism. Since one end of the wiring clamp is always connected to the instrument, when the tester needs to be used, it is only necessary to take out the multiple wiring clamps in the groove and pull the wires out of the casing to quickly connect the instrument to the transformer. After the test is completed, the winding unit can rewind the wires in the casing and the wiring clamps can be replaced in the groove. Compared with the prior art that requires connecting both ends of the wire, certain connection steps are omitted, and the test efficiency is improved. In addition, under the action of the winding mechanism, the wires will not be exposed too much outside the casing, and the phenomenon of entanglement of the wires when winding is avoided, which is convenient for the staff to organize. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall stereogram of a transformer ratio tester;

[0014] Figure 2 It is a main view of a transformer ratio tester;

[0015] Figure 3 for Figure 2 Sectional view at AA;

[0016] Figure 4 for Figure 3 Cross-section of the hollow disk;

[0017] Figure 5 for Figure 2 Cross-section at the middle BB;

[0018] Figure 6 for Figure 5 Enlarged view of point D in the middle;

[0019] In the figure: 1-housing, 2-switch button, 3-operation screen, 4-groove, 5-perforation, 6-wiring clamp, 7-conducting wire, 8-support plate, 9-winding roller, 10-hollow disk, 11-reset coil spring, 12-sliding cover, 13-limiting clamp, 14-movable button, 15-spring, 16-push-pull rod, 17-connecting rod, 18-rotating shaft, 19-clamping block, 20-arc groove. DETAILED DESCRIPTION

[0020] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0021] See also Figure 1-6 A transformer ratio tester comprises a casing 1, a switch button 2 and an operation screen 3 are arranged on the front of the casing 1, a groove 4 is arranged on the side of the casing 1, a plurality of through holes 5 are opened in the groove 4, a wire 7 is passed through the through holes 5, a wiring clamp 6 is arranged at positions corresponding to the plurality of through holes 5 in the groove 4, the wiring clamp 6 is arranged in the groove 4 through a magnetic suction component, one end of the wire 7 is connected to the wiring clamp 6, and the other end is connected to a winding mechanism arranged in the casing 1, the winding mechanism comprises a support plate 8 fixedly installed in the casing 1 and a plurality of winding rollers 9 rotatably installed between the support plate 8 and the casing 1, the wire 7 is wound on the winding roller 9, and a winding unit is fixedly arranged at positions corresponding to the plurality of winding rollers 9 on the support plate 8, The winding unit is used to provide power for the reversal of the winding roller 9. By setting the groove 4 and the winding mechanism, since one end of the terminal clamp 6 is always connected to the instrument, when the tester needs to be used, it is only necessary to take out the multiple terminal clamps 6 in the groove 4 and pull the wire 7 out of the casing 1 to quickly connect the instrument to the transformer. After the test is completed, the winding unit can rewind the wire 7 in the casing 1 and replace the terminal clamp 6 in the groove 4. Compared with the prior art that requires connecting the two ends of the wire 7, certain connection steps are omitted, thereby improving the test efficiency. In addition, under the action of the winding mechanism, the wire 7 will not be exposed too much outside the casing 1, and the phenomenon of entanglement of the wire 7 when winding is also avoided, which is convenient for the staff to organize.

[0022] Specifically, the winding unit includes a hollow disk 10 fixedly mounted on the support plate 8 and a reset coil spring 11 installed in the hollow disk 10 , and the unwinding roller 9 passes through the end of the hollow disk 10 and is connected to the reset coil spring 11 .

[0023] Among them, a sliding cover 12 is also slidably arranged in the groove 4, and the sliding cover 12 is provided with anti-slip grooves. The setting of the sliding cover 12 can seal the wiring clips 6 in the groove 4 after multiple wiring clips 6 are placed in the groove 4, so as to avoid the wiring clips 6 being exposed to the outside and easily lost, and the setting of the anti-slip grooves makes it convenient for the staff to slide the sliding cover 12.

[0024] In addition, in the process of pulling the wire 7 outward, in order to avoid the phenomenon that the reset coil spring 11 drives the winding roller to reverse and causes the wire 7 to be rewound into the casing 1, a brake assembly for limiting the movement of the wire 7 is also provided at the positions corresponding to the multiple perforations 5 in the casing 1 in the present application, and the brake assembly includes a limit clamp 13, a movable button 14, a spring 15 and a push-pull rod 16, the limit clamp 13 includes two cross-arranged connecting rods 17 and a rotating shaft 18 installed at the cross position, the rotating shaft 18 is fixedly installed on the side wall of the casing 1, and the side bottoms of the two connecting rods 17 are symmetrically fixed with clamping blocks 19, the movable button 14 is movably installed on the top surface of the casing 1 through the spring 15, and the bottom end of the movable button 14 is connected to the two connecting rods 17 respectively through the push-pull rod 16, wherein the push-pull One end of the rod 16 is hingedly installed at the bottom of the movable button 14, and the other end is hingedly connected to the connecting rod 17. Specifically, when it is necessary to pull the wire 7, it is necessary to press the movable button 14 above the corresponding wiring clamp 6 on the casing 1 in advance. When the movable button 14 moves downward, the push-pull rod 16 can drive the two connecting rods 17 to rotate around the rotating shaft 18 at the same time, and make the clamping blocks 19 at the ends of the two connecting rods 17 separate from the wire 7. At this time, the wire 7 can be smoothly pulled outward. When the pulling of the wire 7 stops, it is only necessary to release the movable button 14. When the movable button 14 moves upward under the action of the spring 15, it can drive the two connecting rods 17 to reset. The clamping blocks 19 at the ends of the two connecting rods 17 are relatively close to and clamp the wire 7, which can fix the wire 7 and avoid the phenomenon of the guide being rewound.

[0025] Furthermore, an arc groove 20 is provided on the clamping block 19, and a rubber pad is arranged in the arc groove 20. The setting of the arc groove 20 can make the side of the clamping block 19 fit more closely to the wire 7, thereby improving the braking effect of the brake assembly on the wire 7 to a certain extent. The setting of the rubber pad can increase the friction resistance between the arc groove 20 and the wire 7, thereby further improving the braking effect on the wire 7.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A transformer ratio tester, comprising a housing (1), characterized in that: The front of the casing (1) is provided with a switch button (2) and an operation screen (3), and the side of the casing (1) is provided with a groove (4), wherein a plurality of through holes (5) are provided in the groove (4), and a wire (7) is passed through the through holes (5), and a wiring clamp (6) is also provided in the groove (4) at positions corresponding to the plurality of through holes (5), and the wiring clamp (6) is arranged in the groove (4) through a magnetic attraction component, and one end of the wire (7) is connected to the wiring clamp (6), and the other end is connected to a winding mechanism arranged in the casing (1), and the winding mechanism comprises a support plate (8) fixedly mounted in the casing (1) and a plurality of winding rollers (9) rotatably mounted between the support plate (8) and the casing (1), and the wire (7) is wound on the winding roller (9), and a winding unit is also fixedly provided on the support plate (8) at positions corresponding to the plurality of winding rollers (9), and the winding unit is used to provide power for the reversal of the winding roller (9).

2. The transformer ratio tester according to claim 1, characterized in that: The winding unit comprises a hollow disk (10) fixedly mounted on a support plate (8) and a return coil spring (11) mounted inside the hollow disk (10); the unwinding roller (9) passes through the end of the hollow disk (10) and is connected to the return coil spring (11).

3. The transformer ratio tester according to claim 1, characterized in that: A sliding cover (12) is also slidably arranged in the groove (4), and anti-slip grooves are arranged on the sliding cover (12).

4. The transformer ratio tester according to claim 1, characterized in that: A brake assembly for limiting the movement of the wire (7) is also provided at positions corresponding to the plurality of perforations (5) in the casing (1), the brake assembly comprising a limit clamp (13), a movable button (14), a spring (15) and a push-pull rod (16); the limit clamp (13) comprises two cross-arranged connecting rods (17) and a rotating shaft (18) installed at the cross position; the rotating shaft (18) is fixedly installed on the side wall of the casing (1); clamping blocks (19) are symmetrically fixedly provided at the bottom of the sides of the two connecting rods (17); the movable button (14) is movably installed on the top surface of the casing (1) through the spring (15), and the bottom end of the movable button (14) is respectively connected to the two connecting rods (17) through the push-pull rod (16), wherein one end of the push-pull rod (16) is hingedly installed at the bottom of the movable button (14), and the other end is hingedly connected to the connecting rod (17).

5. The transformer ratio tester according to claim 4, characterized in that: The clamping block (19) is provided with an arc-shaped groove (20), and a rubber pad is arranged in the arc-shaped groove (20).

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