A power transformer detection device

Abstract

The utility model relates to power transformer detection technical field discloses a kind of power transformer detection devices, including power transformer, the top surface of power transformer is fixedly installed with protective shell, the inner side wall of protective shell is fixedly installed with fixed vertical plate, the side of fixed vertical plate is fixedly installed with multiple cable connectors, the inside of protective shell is located in the front of cable connector and is provided with limiting assembly, the limiting assembly includes fixed seat, U-shaped hole, installation slot, connecting groove, conical push block, bolt and inclined limit seat, the inside of protective shell is located in the front of cable connector and is fixedly installed with fixed seat, the device is connected with power transformer electrically by the multiple cable connectors of being set, the detection operation of power transformer is carried out, and cable is reliably fixed by limiting assembly, ensure that detection work is efficient, stable, accurate development.

Description

Technical Field

[0001] This application belongs to the field of power transformer testing technology, specifically a power transformer testing device. Background Technology

[0002] A power transformer is a static electrical device that uses the principle of electromagnetic induction to convert alternating current (AC) energy of one voltage level into AC energy of one or more different voltage levels. Widely used in power systems, it plays a crucial role in transmitting, distributing, and transforming electrical energy. In practice, equipment used to test power transformers includes transformer oil chromatographs, turns ratio testers, DC resistance testers, dielectric loss testers, partial discharge detectors, winding deformation testers, and infrared thermal imagers. These testing instruments need to be connected to various testing connectors on the power transformer via dedicated connecting cables. For example, a turns ratio tester is connected to the high and low voltage winding lead connectors to inject test voltage, and a DC resistance tester applies DC current to the winding terminals. Through electrical connections or physical interfaces at the connectors, the transmission of detection signals and the acquisition and analysis of data are achieved, ultimately enabling accurate testing of various performance parameters of the transformer.

[0003] In the testing of power transformers, the connection between external testing instruments and transformer joints relies on various cables (such as test leads, signal lines, etc.). However, the existing connection methods lack effective cable fixing. During the testing process, the cables are easily pulled by personnel walking, equipment moving, or other external forces, causing the connection between the cables and joints to loosen. This can easily lead to interruption of the test signal and data distortion. Furthermore, different test items require the connection of multiple cables. The scattered cables are tangled and dragged, which not only affects the operating space but may also cause some cables to fall off due to accidental contact, prolonging the testing time. Therefore, a power transformer testing device is provided. Utility Model Content

[0004] The purpose of this application is to provide a power transformer testing device in order to solve the problems mentioned above.

[0005] The technical solution adopted in this application is as follows: a power transformer testing device, including a power transformer, a protective shell is fixedly installed on the top surface of the power transformer, a fixed upright plate is fixedly installed on the inner side wall of the protective shell, a plurality of cable connectors are fixedly installed on one side of the fixed upright plate, and a limit component is provided inside the protective shell in front of the cable connectors. The limiting component includes a fixed base, a U-shaped hole, a mounting groove, a connecting groove, a conical push block, a bolt, and an inclined limiting seat. The fixed base is fixedly installed inside the protective housing in front of the cable connector. The top surface of the fixed base has multiple U-shaped holes corresponding to the cable connector. The inner sidewall of the U-shaped hole has a mounting groove. The top surface of the mounting groove has a connecting groove. The connecting groove has a conical push block inside. The top surface of the fixed base is threaded with a bolt. The bottom end of the bolt extends into the connecting groove and is fixed to the top surface of the conical push block. The mounting groove has an inclined limiting seat inside.

[0006] In a preferred embodiment, an L-shaped connection hole is provided on the front side of the protective housing, and a limit sealing plate is symmetrically fixedly installed on the inner sidewall of the L-shaped connection hole. A sealing cover plate is hinged inside the L-shaped connection hole.

[0007] In a preferred embodiment, a sliding groove is provided on the inner bottom surface of the mounting groove, and a slider is slidably connected inside the sliding groove. The top end of the slider is fixed to the bottom surface of the inclined limiting seat.

[0008] In a preferred embodiment, a flexible pad is fixedly installed on the inner wall surface of the U-shaped hole.

[0009] In a preferred embodiment, multiple heat dissipation plates are fixedly installed on the side of the power transformer, and two support bases are fixedly installed on the bottom surface of the power transformer.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are: 1. In this application, due to the adoption of the above-mentioned scheme, personnel first connect the external testing equipment to the cable connector via wires, thus enabling the external testing equipment to be electrically connected to the power transformer for various parameter tests. At this time, personnel rotate the bolt, which drives the conical push block to move down. The conical push block presses against the inclined limit seat, and the inclined limit seat slides along the groove to approach the cable. With the help of the U-shaped hole and flexible pad, the cable is firmly clamped and fixed. The device, through the multiple cable connectors, facilitates the electrical connection between the external testing equipment and the power transformer for power transformer testing operations. The limit components reliably fix the cable, ensuring that the testing work is carried out efficiently, stably, and accurately. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the protective shell structure of this application; Figure 3 This is a schematic diagram of the cable connector structure of this application; Figure 4This is a side sectional view of the fixed base structure of this application.

[0012] The markings in the diagram are: 1. Power transformer; 2. Protective housing; 3. Fixed plate; 4. Cable connector; 5. Limiting component; 501. Fixed base; 502. U-shaped hole; 503. Mounting groove; 504. Connecting groove; 505. Conical push block; 506. Bolt; 507. Inclined limiting seat; 6. L-shaped connecting hole; 7. Limiting sealing plate; 8. Sealing cover plate; 9. Slide groove; 10. Sliding block; 11. Flexible pad; 12. Heat sink; 13. Support base. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] refer to Figures 1-4 As shown, a power transformer testing device includes a power transformer 1. Multiple heat dissipation plates 12 are fixedly installed on the sides of the power transformer 1, and two support bases 13 are fixedly installed on the bottom surface of the power transformer 1. The heat dissipation plates 12 can quickly dissipate the heat generated by the operation of the power transformer 1, maintain a suitable operating temperature of the equipment, and extend the service life of internal components. The support bases 13 can stably support the power transformer 1, maintain a reasonable distance between it and the mounting surface, facilitate bottom ventilation and heat dissipation, and also facilitate the handling and leveling of the equipment during installation and maintenance.

[0015] refer to Figures 1-4 As shown, a protective housing 2 is fixedly installed on the top surface of the power transformer 1. An L-shaped connection hole 6 is opened on the front side of the protective housing 2. Limiting sealing plates 7 are symmetrically fixedly installed on the inner side wall of the L-shaped connection hole 6. A sealing cover plate 8 is hinged inside the L-shaped connection hole 6. A fixed upright plate 3 is fixedly installed on the inner side wall of the protective housing 2. Multiple cable connectors 4 are fixedly installed through one side of the fixed upright plate 3. A limiting component 5 is set inside the protective housing 2 in front of the cable connectors 4. The protective housing 2 can effectively block the intrusion of external dust, water vapor, foreign objects, etc., and protect the internal cable connectors 4 and related detection and connection structures. The L-shaped connection hole 6, together with the limiting sealing plate 7 and the sealing cover plate 8, allows personnel to open the sealing cover plate 8 when needed to connect the cable. When not needed, the sealing cover plate 8 is closed to seal the L-shaped connection hole 6, thus reducing the impact of the external environment on the interior. The fixed upright plate 3 provides a stable installation carrier for the cable connectors 4 and ensures the reliability of the connector connection. Cable connector 4 adopts a universal power testing connector (such as common banana plugs, aviation plug adapters, etc., which can be used with most power testing instruments). It is electrically connected to the windings, core grounding wires, oil temperature sensor terminals, and other components of the power transformer 1. This allows for the testing of the DC resistance of the windings and the grounding current of the core of the power transformer 1 after connecting an external testing instrument. The operation procedure of connecting the cable connector 4 to the testing instrument to carry out the testing is a routine and mature method in the existing preventive testing and condition monitoring of power transformers. It is widely used in the operation and maintenance process of power equipment to determine the health status of the equipment by obtaining the electrical and physical parameters of various components of the transformer.

[0016] refer to Figures 1-4 As shown, the limiting component 5 includes a fixed base 501, a U-shaped hole 502, a mounting groove 503, a connecting groove 504, a conical push block 505, a bolt 506, and an inclined limiting seat 507. The fixed base 501 is fixedly installed inside the protective housing 2 in front of the cable connector 4. The top surface of the fixed base 501 has multiple U-shaped holes 502 corresponding to the cable connector 4. A flexible pad 11 is fixedly installed on the inner wall of the U-shaped hole 502. The U-shaped hole 502 facilitates the quick insertion and positioning of the cable. The flexible pad 11 prevents the cable from making hard contact with the hole wall, thus providing a buffer and protection effect, reducing cable wear, and enhancing the sealing and stability after connection.

[0017] refer to Figures 1-4 As shown, the inner wall of the U-shaped hole 502 has a mounting groove 503, and the top surface of the mounting groove 503 has a connecting groove 504. A tapered push block 505 is installed inside the connecting groove 504. A bolt 506 is threaded onto the top surface of the fixing seat 501. The bottom end of the bolt 506 extends into the connecting groove 504 and is fixed to the top surface of the tapered push block 505. An inclined limiting seat 507 is installed inside the mounting groove 503, and a sliding groove 9 is provided on the bottom surface of the mounting groove 503. A sliding connection is established inside the sliding groove 9. A slider 10 is attached, and the top of the slider 10 is fixed to the bottom surface of the inclined limiting seat 507. By rotating the set bolt 506, the conical push block 505 is easily driven to move down. The inclined surface of the conical push block 505 presses against the inclined limiting seat 507. With the guidance of the slide groove 9 and the slider 10, the cable inserted into the U-shaped hole 502 can be firmly clamped, preventing the cable from loosening or falling off due to external force. This ensures stable signal transmission during the testing process. Moreover, the structure is easy to operate and facilitates the loading and unloading of cables before and after testing.

[0018] The implementation principle of an embodiment of a power transformer testing device of this application is as follows: When it is necessary to test the power transformer 1, the user first opens the sealing cover 8, inserts the cable of the testing instrument into the L-shaped connection hole 6, and then inserts it into the corresponding U-shaped hole 502. Then, the user rotates the bolt 506, which drives the conical push block 505 to move down. The conical push block 505 presses against the inclined limiting seat 507, and the inclined limiting seat 507 slides along the slide groove 9 to approach the cable. With the help of the U-shaped hole 502 and the flexible pad 11, the cable is firmly clamped and fixed. After that, the testing instrument passes through the cable connector. 4. Establish electrical connection with the corresponding internal components of the power transformer 1 to perform various parameter tests. After the test is completed, rotate the bolt 506 in the reverse direction to contact the limit seat 507, and then remove the cable. Close the sealing cover 8. The protective shell 2 can protect the internal structure. The device facilitates the electrical connection between external testing equipment and the power transformer 1 through multiple cable connectors 4, enabling the testing operation of the power transformer 1. The limit component 5 reliably fixes the cable, ensuring that the testing work is carried out efficiently, stably, and accurately, and assisting in the condition assessment and operation and maintenance management of the power transformer.

[0019] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A power transformer testing device, comprising a power transformer (1), characterized in that: The top surface of the power transformer (1) is fixedly equipped with a protective shell (2), and a fixed plate (3) is fixedly installed on the inner side wall of the protective shell (2). Multiple cable connectors (4) are fixedly installed on one side of the fixed plate (3). A limit component (5) is provided inside the protective shell (2) in front of the cable connectors (4). The limiting component (5) includes a fixing seat (501), a U-shaped hole (502), a mounting groove (503), a connecting groove (504), a conical push block (505), a bolt (506), and an inclined limiting seat (507). The fixing seat (501) is fixedly installed inside the protective housing (2) in front of the cable connector (4). The top surface of the fixing seat (501) has multiple U-shaped holes (502) corresponding to the cable connector (4). The U-shaped holes (502)... An installation groove (503) is provided on the inner sidewall. A connecting groove (504) is provided on the inner top surface of the installation groove (503). A conical push block (505) is provided inside the connecting groove (504). A bolt (506) is threadedly connected to the top surface of the fixing seat (501). The bottom end of the bolt (506) extends into the interior of the connecting groove (504) and is fixed to the top surface of the conical push block (505). An inclined limiting seat (507) is provided inside the installation groove (503).

2. The power transformer testing device as described in claim 1, characterized in that: The protective housing (2) has an L-shaped connection hole (6) on the front side. A limit sealing plate (7) is symmetrically fixedly installed on the inner wall of the L-shaped connection hole (6). A sealing cover plate (8) is hinged inside the L-shaped connection hole (6).

3. The power transformer testing device as described in claim 1, characterized in that: The mounting groove (503) has a sliding groove (9) on its inner bottom surface. A slider (10) is slidably connected inside the sliding groove (9). The top of the slider (10) is fixed to the bottom surface of the inclined limiting seat (507).

4. The power transformer testing device as described in claim 1, characterized in that: A flexible pad (11) is fixedly installed on the inner wall of the U-shaped hole (502).

5. The power transformer testing device as described in claim 1, characterized in that: Multiple heat dissipation plates (12) are fixedly installed on the side of the power transformer (1), and two support bases (13) are fixedly installed on the bottom surface of the power transformer (1).

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