Transformer winding deformation tester

Abstract

The invention discloses a transformer winding deformation tester which comprises a frequency response tester body, one side of the frequency response tester body is provided with a power connector, the other side of the frequency response tester body is provided with a test connector, the test connector is connected with a first terminal, and the other end of the first terminal is sequentially connected with a wire and a second terminal. The outer side of the second wiring end is sleeved with a protection rotating cylinder, the other end of the protection rotating cylinder is rotationally connected with a rotating ring, one side of the rotating ring is fixedly connected with a limiting frame, a sliding plate movably penetrates through the limiting frame, the tail end face of the sliding plate is fixedly connected with an extension supporting plate, and the surface of the extension supporting plate is fixedly connected with a metal wire brush and a nylon brush in parallel. According to the invention, a rotatable and length-adjustable cleaning structure is innovatively combined with the wiring end, and through free rotation of the rotating ring and length adjustment of the sliding plate, transformer test points with different positions and depths can be accurately attached, and surface dust and oxide layer cleaning can be synchronously completed before wiring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deformation testing equipment, and particularly relates to a transformer winding deformation tester. BACKGROUND

[0002] The transformer winding deformation tester is a professional instrument specially used for detecting whether mechanical deformation of a power transformer winding occurs in the process of short circuit, transportation, installation and the like. The transformer winding deformation tester applies a signal of a specific frequency to the transformer winding, measures and analyzes frequency response characteristics of the winding, compares the frequency response characteristics with original or standard characteristics, and judges whether the winding is deformed, thereby providing an important basis for safe operation and fault diagnosis of the transformer.

[0003] Most of the existing transformer winding deformation testers do not have a cleaning structure, and dust or an oxide layer is easily accumulated on the terminal head of the equipment due to long-term use. The accumulation of dust impurities and the oxide layer may affect the accuracy of test parameters. SUMMARY

[0004] The present application aims at solving the problem that most of the existing transformer winding deformation testers do not have a cleaning structure, and dust or an oxide layer is easily accumulated on the terminal head of the equipment due to long-term use, which may affect the accuracy of test parameters, and provides a transformer winding deformation tester.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a transformer winding deformation tester, comprising: a frequency response tester body, a power connector is arranged on one side of the frequency response tester body, a test connector is arranged on the other side of the frequency response tester body, a first terminal is connected to the test connector, a wire and a second terminal are sequentially connected to the other end of the first terminal, a protective rotating drum is arranged on the outer side of the second terminal, a rotating ring is rotatably connected to the other end of the protective rotating drum, a limiting frame is fixedly connected to one side of the rotating ring, a sliding plate is movably arranged in the limiting frame, an extension supporting plate is fixedly connected to the end surface of the sliding plate, a metal wire brush and a nylon brush are fixedly connected in parallel on the surface of the extension supporting plate, a bow-shaped insertion rod is movably arranged in the limiting frame, a tension spring is fixedly connected to the middle segment of the bow-shaped insertion rod, and a positioning hole is formed through the sliding plate.

[0006] As a further scheme of the present application: the first terminal, the wire and the second terminal form a wire structure for connecting the frequency response tester body and the transformer, two groups of limiting rings are fixedly arranged in parallel on the outer side of the second terminal, and a perforation is formed through one end of the protective rotating drum, so that the second terminal is arranged through the protective rotating drum and the connection relationship between the second terminal and the protective rotating drum is maintained under the clamping action of the two groups of limiting rings.

[0007] As a further scheme of the present application: the protective rotating drum is fixedly connected with a connecting ring at the end face, a connecting groove is formed in the inner side of the rotating ring and is matched with the connecting ring, and the limiting frame and the structure connected with the limiting frame can rotate freely.

[0008] As a further scheme of the present application: the sliding plate is movably arranged in the limiting frame, and the extension supporting plate, the wire brush and the nylon brush fixedly connected with the end face of the sliding plate are all arc-shaped structures.

[0009] As a further scheme of the present application: the limiting frame is movably arranged with an arc-shaped inserting rod at one side, one end of the tension spring is fixedly connected with the middle part of the arc-shaped inserting rod, and the other end is fixedly connected with one end of the limiting frame outside, a plurality of groups of positioning holes are arranged on the sliding plate and are symmetrically formed, and the specifications are matched with the specifications of the arc-shaped inserting rod.

[0010] As a further scheme of the present application: the protective rotating drum is fixedly connected with a connecting ring at the end face, a connecting groove is formed in the inner side of the rotating ring and is matched with the connecting ring, and the limiting frame and the structure connected with the limiting frame can rotate freely.

[0011] As a further scheme of the present application: the protective rotating drum is fixedly connected with a connecting ring at the end face, a connecting groove is formed in the inner side of the rotating ring and is matched with the connecting ring, and the limiting frame and the structure connected with the limiting frame can rotate freely.

[0012] Compared with the prior art, the present application has the following advantages: 1. The present application innovatively combines the rotatable and length-adjustable cleaning structure with the wiring end, and through the free rotation of the rotating ring and the length adjustment of the sliding plate, the transformer test points at different positions and depths can be accurately fitted, and the surface dust and oxide layer can be cleaned synchronously before wiring, compared with the similar equipment which needs to carry cleaning tools or rely on manual wiping, the design not only avoids the problem of poor contact caused by stains, but also reduces the operation steps, and significantly improves the efficiency of the test preparation stage and the stability of the test results. 2. The present application realizes the orderly storage of the wires through the cooperation of the folding frame and the wire clamping plate, avoids winding and knotting, and uses the clamping structure composed of the clamping frame, the clamping block and the tension spring to quickly fix the wires and prevent loosening, and the combination of the protective rotating drum and the limiting ring provides insulation protection for the wiring end, which can more comprehensively protect the wires and the joints, reduce the risk of external damage, and ensure the stability of signal transmission during the test process, and has the multiple advantages of space saving, convenient operation and safety protection. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a whole structure schematic view of a transformer winding deformation tester according to the present application; Figure 2 is a structure schematic view of a power connection in a transformer winding deformation tester according to the present application; Figure 3 is a structure schematic view of a protective rotating drum in a transformer winding deformation tester according to the present application; Figure 4 is a structure schematic view of a sliding plate in a transformer winding deformation tester according to the present application; Figure 5 is a structure schematic view of a clamping block in a transformer winding deformation tester according to the present application.

[0014] In the figure: 1, frequency response tester body; 2, protective box cover; 3, operation screen; 4, power connection; 5, test connection; 6, wiring end one; 7, wire; 8, wiring end two; 9, limiting ring; 10, protective rotating drum; 11, perforation; 12, rotating ring; 13, connecting ring; 14, connecting groove; 15, limiting frame; 16, sliding plate; 17, extension supporting plate; 18, metal wire brush; 19, nylon brush; 20, bow-shaped insertion rod; 21, tension spring; 22, positioning hole; 23, clamping frame; 24, clamping block; 25, limiting pull handle; 26, tension spring; 29, folding frame; 30, wire clamping plate. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0017] Reference Figures 1 to 5 In this embodiment of the invention, a transformer winding deformation tester includes: a frequency response tester body 1, a power connector 4 on one side of the frequency response tester body 1, a test connector 5 on the other side of the frequency response tester body 1, a terminal 6 connected to the test connector 5, a wire 7 and a terminal 8 connected to the other end of the terminal 6, a protective rotating cylinder 10 sleeved on the outside of the terminal 8, a rotating ring 12 rotatably connected to the other end of the protective rotating cylinder 10, a limit frame 15 fixedly attached to one side of the rotating ring 12, a sliding plate 16 movably passing through the limit frame 15, an extension support plate 17 fixedly attached to the end face of the sliding plate 16, a metal wire brush 18 and a nylon brush 19 fixedly attached parallel to the surface of the extension support plate 17, an arc-shaped insert rod 20 movably passing through the limit frame 15, a tension spring 21 fixedly attached to the middle section of the arc-shaped insert rod 20, and a positioning hole 22 penetrating through the sliding plate 16.

[0018] Reference Figures 1 to 3 The wiring terminal 6, wire 7 and wiring terminal 8 form a wire structure for connecting the frequency response tester body 1 and the transformer. Two sets of parallel limiting rings 9 are fixedly sleeved on the outside of the wiring terminal 8. One end of the protective rotating cylinder 10 has a through hole 11 so that the wiring terminal 8 can pass through the protective rotating cylinder 10 and maintain the connection between the two under the clamping action of the two sets of limiting rings 9.

[0019] The above scheme is adopted: Terminal 1 6 is adapted to the test connector 5 of the frequency response tester body 1, Terminal 2 8 is used to connect to the test point of the transformer, the wire 7 is made of high insulation and low loss material to ensure stable transmission of test signals, the two sets of limiting rings 9 are made of insulating material, the spacing is slightly larger than the wall thickness of the protective rotating cylinder 10, and the inner diameter of the through hole 11 is closely adapted to the outer diameter of Terminal 2 8. When Terminal 2 8 is inserted into the protective rotating cylinder 10, the two sets of limiting rings 9 are respectively attached to the inner and outer sides of the protective rotating cylinder 10 to form axial limiting. This structure not only ensures the stable connection between the protective rotating cylinder 10 and Terminal 2 8 and prevents the protective rotating cylinder 10 from falling off during the test, but also does not affect the normal connection between Terminal 2 8 and the transformer. At the same time, the insulation characteristics of the limiting rings 9 can avoid leakage or signal interference during the test, and improve the safety and accuracy of the test.

[0020] Reference Figure 3 and Figure 5 The protective rotating cylinder 10 has a connecting ring 13 fixed to its end face. The inner side of the rotating ring 12 has a connecting groove 14 that matches the specifications of the connecting ring 13. The limiting frame 15 and its internal connecting structure can rotate freely with the rotating ring 12.

[0021] The above scheme is adopted as follows: the connecting ring 13 is an annular protrusion structure, which is integrally formed or firmly welded to the protective rotating cylinder 10. The connecting groove 14 is an annular groove on the inner side of the rotating ring 12. Its width and depth are precisely matched with the size of the connecting ring 13, and the two form a clearance fit, which not only ensures that the rotating ring 12 can rotate flexibly, but also prevents axial fall-off. The limiting frame 15 is fixed to one side of the rotating ring 12 by welding or bolts and rotates synchronously with the rotating ring 12. The free rotation design allows the limiting frame 15 and the internal cleaning structure, namely the wire brush 18 and the nylon brush 19, to rotate and clean the terminal before the terminal is connected, cleaning and scraping the dust, impurities and oxide layer on the surface of the terminal. At the same time, the stable fit between the connecting ring 13 and the connecting groove 14 avoids loosening during the rotation process and ensures the stability of cleaning and testing operations.

[0022] Reference Figure 4 The sliding plate 16 is movably inserted inside the limiting frame 15, and the extension plate 17, the wire brush 18 and the nylon brush 19 fixed to the end face are all arc-shaped structures.

[0023] The above scheme employs the following: the sliding plate 16 is a long strip of metal or high-strength plastic plate, which slides into the inner cavity of the limiting frame 15. The contact surfaces of the two are smoothed to reduce friction. The extension plate 17 serves as a carrier, and its arc surface curvature is adapted to the outer surface curvature of common transformer windings or terminals. The wire brush 18 uses soft and wear-resistant metal wires to remove stubborn oxide layers or stains, while the nylon brush 19 is used to clean dust and other light impurities. The two brushes are arranged in parallel, with the bristles slightly higher than the surface of the extension plate 17. The arc-shaped structure allows the wire brush 18 and the nylon brush 19 to better fit the surface of the transformer test points, resulting in more comprehensive and thorough cleaning and avoiding poor test contact caused by surface stains. The design of the sliding plate 16 allows for adjustment of the extension length of the extension plate 17, adapting to test points of different depths or distances and improving the versatility of the equipment.

[0024] Reference Figure 4 A bow-shaped insert rod 20 is movably inserted through one side of the limiting frame 15. One end of the tension spring 21 is fixed to the middle section of the bow-shaped insert rod 20, and the other end is fixed to one end of the outer side of the limiting frame 15. Several sets of positioning holes 22 are provided, symmetrically opened on the sliding plate 16, and their specifications are adapted to the specifications of the bow-shaped insert rod 20.

[0025] The above solution employs an arch-shaped insert 20 made of elastic metal with pins at both ends. It passes through the limiting frame 15 and inserts into the positioning holes 22 of the sliding plate 16. When the tension spring 21 is in its natural state, the pins of the arch-shaped insert 20 are tightly inserted into the positioning holes 22, forming a lock. Pulling the middle section of the stretchable spring of the arch-shaped insert 20 disengages the pins from the positioning holes 22, releasing the lock. The positioning holes 22 are evenly distributed along the length of the sliding plate 16, with the spacing between adjacent holes designed according to common adjustment needs. Through the cooperation of the arch-shaped insert 20 and the positioning holes 22, the position of the sliding plate 16 can be quickly fixed, achieving precise adjustment of the extension length of the extended support plate 17. Operation is convenient. The continuous tension of the tension spring 21 ensures the stability of the locked state, preventing accidental movement of the sliding plate 16 during testing or cleaning, thus improving operational reliability. Multiple sets of positioning holes 22 provide various adjustment levels to meet the needs of different scenarios.

[0026] Reference Figure 5 A clamping frame 23 is connected through one side of the protective rotating cylinder 10. A clamping block 24 is movably inserted inside the clamping frame 23. A limit handle 25 is fixed to the midpoint of one side of the clamping block 24. Tension springs 26 are symmetrically fixed to both ends of the clamping block 24 on the same side. The other ends of the two sets of tension springs 26 are fixed to the inside of the clamping frame 23.

[0027] The above scheme is adopted: the clamping frame 23 has a U-shaped structure and is connected to the protective rotating cylinder 10. Its inner cavity width is slightly larger than the diameter of the wire 7. The clamping block 24 is an arc-shaped rubber block with anti-slip texture on the surface. The four sets of clamping blocks 24 form a clamping space. Pulling the limit handle 25 can drive the clamping block 24 to move outward and compress the tension spring 26. After releasing, the elastic force of the tension spring 26 pushes the clamping block 24 to reset and cooperate with the clamping frame 23 to clamp the terminal. This structure can effectively fix the connection relationship between the terminal 8 and the equipment terminal, prevent the terminal from becoming loose or having poor contact due to pulling or shaking during the test, and ensure the stable transmission of the test signal. The arc-shaped anti-slip clamping block 24 not only avoids damage to the wire insulation layer when clamping, but also enhances the clamping force. The wire can be quickly tightened or loosened by the limit handle 25, which is convenient for adjusting the wire length or replacing the wire and improving the operating efficiency.

[0028] Reference Figure 1 The frequency response tester body 1 has symmetrical folding frames 29 fixed to both sides, and a wire clamping plate 30 fixed to the end of the folding frame 29. The power connector 4 and the test connector 5 are both located within the range of the folding frame 29. The top of the frequency response tester body 1 is hinged with a protective box cover 2, and an operation screen 3 is set on the top surface of the frequency response tester body 1.

[0029] The above solution is adopted: the folding frame 29 adopts a foldable hinge structure, which can be folded to fit the side of the frequency response tester body 1 when not in use, saving space. When unfolded, the wire clamping plate 30 has a slot that matches the diameter of the wire 7 for storing and fixing excess wires. The protective box cover 2 is made of hard plastic or metal, which can completely cover the top surface of the tester when closed, and has sealing strips on the edges. The operation screen 3 is a high-definition touch screen that integrates test parameter settings, data display and other functions. The folding frame 29 and the wire clamping plate 30 facilitate the organization and storage of wires, avoid wire tangling and knots, keep the test site clean, and protect wires and connectors from external damage. The protective box cover 2 can effectively prevent dust, water and impact, protect the operation screen 3 and the internal components of the tester, and extend the service life of the equipment. The setting of the operation screen 3 makes the test operation more intuitive and convenient, and improves work efficiency.

[0030] The working principle of this invention is as follows: Before testing, the protective cover 2 is in a closed state, and the operation screen 3 on the top surface of the frequency response tester body 1 and the internal components are protected by hard material and edge sealing strips to avoid damage caused by dust, moisture or impact. When in use, the protective cover 2 is opened, and the test parameters are set through the operation screen 3 to prepare for the test. During the equipment wiring stage, the test connector 5 on one side of the frequency response tester body 1 is adapted to the terminal 6. The terminal 6 is connected to the terminal 8 through a high-insulation, low-loss wire 7. The terminal 8 is used to connect to the transformer test point, forming a signal transmission path of "tester-wire-transformer". At this time, the folding frames 29 on both sides of the frequency response tester body 1 are unfolded, and the slot of the wire clamping plate 30 at its end can store and fix the excess wire 7, avoid the wire from getting tangled and knotted, keep the test site clean, and protect the wire and connector from external damage. The protective rotating cylinder 10 on the outside of terminal 2 8 is fitted onto it through the through hole 11. Two sets of parallel insulating limiting rings 9 are respectively attached to the inner and outer sides of the protective rotating cylinder 10 to form axial limiting, which not only ensures the stable connection between the protective rotating cylinder 10 and terminal 2 8, but also avoids leakage or signal interference during testing through insulation characteristics, thereby improving safety and accuracy. Before connecting the transformer test point, the surface of the test point needs to be treated by cleaning the structure. The connecting ring 13 at the end of the protective rotating cylinder 10 and the connecting groove 14 on the inner side of the rotating ring 12 form a clearance fit, so that the rotating ring 12 can rotate freely, thereby driving the limiting frame 15 fixed to the rotating ring 12 and the internal structure to rotate synchronously. Pull the middle section of the bow-shaped plug rod 20 and stretch the tension spring 21 to release its lock on the sliding plate 16. The sliding plate 16 slides along the inner cavity of the limiting frame 15 to adjust the extension length of the extension plate 17 to adapt to test points of different depths. After adjustment, release the bow-shaped plug rod 20 and the tension spring 21 resets so that the plug rod is inserted into the corresponding positioning hole 22 to fix the position of the sliding plate 16. The extension plate 17 and the metal wire brush 18 and nylon brush 19 on the surface have an arc-shaped structure that fits the surface of the transformer test point. During rotation, the nylon brush 19 cleans dust and other light impurities, and the metal wire brush 18 removes the stubborn oxide layer to ensure that the surface of the test point is clean and to avoid poor contact affecting signal transmission. After cleaning, the device terminals and the tester terminals 28 are fixed by the clamping structure. The clamping frame 23 on one side of the protective rotating drum 10 cooperates with the clamping block 24. Pulling the limit handle 25 moves the clamping block 24 outward, compressing the tension spring 26. After placing the device terminals in the clamping space, the handle is released, and the tension spring 26 resets and pushes the arc-shaped anti-slip clamping block 24 to clamp the terminals. This prevents the terminals from loosening due to pulling or shaking during the test, ensuring stable signal transmission and avoiding damage to the wire insulation layer. During the test, the frequency response tester body 1 sends a test signal to the transformer winding through the above-mentioned connection path. After being reflected by the winding, the feedback signal is received. The operation screen 3 displays the signal data and analysis results in real time, such as the frequency response curve, and finally completes the detection of transformer winding deformation. Throughout the process, each structure has a clear division of labor, from equipment protection, wiring arrangement, test point cleaning to stable signal transmission, ensuring the accuracy and efficiency of the test in all aspects.

[0031] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A transformer winding deformation tester, comprising: The frequency response tester body (1) is characterized in that a power connector (4) is provided on one side of the frequency response tester body (1), and a test connector (5) is provided on the other side of the frequency response tester body (1), and the test connector (5) is connected to a terminal block (6). The other end of terminal 1 (6) is connected to wire (7) and terminal 2 (8) in sequence. A protective rotating cylinder (10) is sleeved on the outside of terminal 2 (8). A rotating ring (12) is rotatably connected to the other end of the protective rotating cylinder (10). A limiting frame (15) is fixedly connected to one side of the rotating ring (12). A sliding plate (16) is movably inserted inside the limiting frame (15). An extension plate (17) is fixedly connected to the end face of the sliding plate (16). A metal wire brush (18) and a nylon brush (19) are fixedly connected parallel to each other on the surface of the extension plate (17).

2. The transformer winding deformation tester according to claim 1, characterized in that, The limiting frame (15) is equipped with an arc-shaped insert rod (20) that moves through it. A tension spring (21) is fixedly connected to the middle section of the arc-shaped insert rod (20). The sliding plate (16) is provided with a positioning hole (22).

3. The transformer winding deformation tester according to claim 1, characterized in that, The first terminal (6), the wire (7) and the second terminal (8) form a wire structure for connecting the main body (1) of the frequency response tester and the transformer. Two sets of parallel limiting rings (9) are fixedly sleeved on the outside of the second terminal (8). The protective rotating cylinder (10) has a through hole (11) at one end so that the second terminal (8) can pass through the protective rotating cylinder (10) and maintain the connection between the two under the clamping action of the two sets of limiting rings (9).

4. The transformer winding deformation tester according to claim 1, characterized in that, The protective rotating cylinder (10) is fixed to a connecting ring (13) at its end face. The inner side of the rotating ring (12) is provided with a connecting groove (14) that matches the specifications of the connecting ring (13). The limiting frame (15) and its internal connecting structure can rotate freely with the rotating ring (12).

5. A transformer winding deformation tester according to claim 1, characterized in that, The sliding plate (16) is movably inserted inside the limiting frame (15), and the extension plate (17), the wire brush (18) and the nylon brush (19) fixed to the end face are all arc-shaped structures.

6. A transformer winding deformation tester according to claim 1, characterized in that, The limiting frame (15) has an arc-shaped insert rod (20) movably inserted on one side. One end of the tension spring (21) is fixed to the middle section of the arc-shaped insert rod (20), and the other end is fixed to the outer end of the limiting frame (15).

7. A transformer winding deformation tester according to claim 6, characterized in that, The number of positioning holes (22) is set in several groups, which are symmetrically opened on the sliding plate (16) and the specifications are adapted to the specifications of the bow-shaped insert (20).

8. A transformer winding deformation tester according to claim 1, characterized in that, A clamping frame (23) is connected through one side of the protective rotating cylinder (10). A clamping block (24) is movably inserted inside the clamping frame (23). A limit handle (25) is fixedly connected to the midpoint of one side of the clamping block (24). Tensioning springs (26) are symmetrically fixed at both ends of the clamping block (24) on the same side. The other ends of the two sets of tensioning springs (26) are fixedly connected to the inside of the clamping frame (23).

9. A transformer winding deformation tester according to claim 1, characterized in that, The frequency response tester body (1) is symmetrically fixed with folding frames (29) on both sides. The end of the folding frame (29) is fixed with a wire clamping plate (30). The power connector (4) and the test connector (5) are both located within the folding frame (29). The top of the frequency response tester body (1) is hinged with a protective box cover (2). The top surface of the frequency response tester body (1) is provided with an operation screen (3).

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