Auxiliary device for transformer iron core vibration test
By designing auxiliary devices for stabilizing frames and protective components, the safety hazards and core displacement problems during the installation of transformer core vibration testing devices were solved, achieving rapid and safe core installation and accurate test data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中电华创(苏州)电力技术研究有限公司
- Filing Date
- 2025-04-29
- Publication Date
- 2026-05-05
AI Technical Summary
Existing transformer core vibration testing devices have safety hazards and are time-consuming and labor-intensive to install. Furthermore, the core is prone to displacement during long-term testing, leading to inaccurate test data.
An auxiliary device including a stabilizer, a moving component, and a protective component is designed. The stabilizer has a limiting cavity inside, and the sensor is fixed on the outer periphery. The protective component limits the iron core in the limiting cavity through magnetic elements and a rotating seat. The moving component stabilizes its position through guide posts and elastic elements.
It enables rapid and safe installation of the iron core, avoids the risk of impact, ensures the stability of the iron core and the fit between the sensor and the iron core during vibration testing, and improves the accuracy of the test data.
Smart Images
Figure CN224202695U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of transformer vibration testing technology, and in particular relates to an auxiliary device for transformer core vibration testing. Background Technology
[0002] A power transformer is a static high-voltage electrical device. Its internal iron core vibrates under the influence of an electromagnetic field, and also vibrates due to magnetostriction caused by changes in excitation current. However, under overload or excitation faults, the transformer core will exhibit abnormal vibrations with increased amplitude and frequency. Severe abnormal vibrations can lead to winding deformation, inter-turn insulation wear, component overheating, and loosening of core clamps. Therefore, regular vibration testing of the transformer core is crucial.
[0003] Currently, while existing testing equipment can basically complete core vibration tests, it has the following drawbacks in use: 1. For vibration tests on large transformer cores, a large-sized testing frame is required. One existing installation method is to hoist the testing frame and then cover it entirely onto the core under test. This method is prone to collisions during installation and poses significant safety hazards. Another existing method involves disassembling the hoisting components of the testing frame and then reassembling them. This method is time-consuming, labor-intensive, and increases transportation and labor costs. 2. When long-term testing is required, the transformer core is prone to displacement due to vibration, causing the vibration sensor to not fit properly with the core under test, resulting in inaccurate test data. Utility Model Content
[0004] To address the problems of inconvenience during installation and the tendency for the tested iron core to shift in existing testing devices as described in the background art, this utility model proposes the following technical solution:
[0005] An auxiliary device for a transformer vibration test includes: a stabilizer, a moving assembly, multiple sensors, and a protective assembly; the stabilizer has a limiting cavity matching the iron core under test, and multiple sensors are fixedly mounted on the outer periphery of the stabilizer; each group of the moving assemblies is respectively disposed on one of the opposite wide faces of the stabilizer, and each group of the moving assemblies is symmetrically distributed about the iron core under test; the protective assembly is rotatably disposed on one of the narrow faces of the stabilizer to limit the iron core under test within the limiting cavity during the vibration test.
[0006] The stabilizer includes two side panels, multiple connecting plates, and a side rail. Each side panel is connected to the other side panel via the connecting plates to form the limiting cavity between the side panels. Each connecting plate is spaced apart between the side panels, and the sensor is fixedly mounted on the connecting plate. The side rail is fixedly mounted on another narrow surface of the side panel, and the sensor is fixedly mounted on the wide surface of the side rail.
[0007] Furthermore, the protective assembly includes: a rotating seat, a limiting joint, and a magnetic element; the rotating seat includes a first part and a second part that are rotatably connected; the limiting joint is vertically fixed on the surface of the first part, and the connecting shaft between the first part and the second part is fixed on the narrow surface of the side baffle; the magnetic element is fixed on the narrow surface of the side baffle, and when the rotating seat rotates, one of the hinge plates of the rotating seat is magnetically connected to the stabilizer through the magnetic element, and the end of the limiting joint abuts against the surface of the iron core to be tested.
[0008] Furthermore, each set of the moving components includes: a positioning plate, two guide posts, an adjusting screw, a moving plate, a first elastic element, and a caster wheel; the positioning plate is fixedly mounted on the wide surface of the side baffle, and the guide posts are respectively fixedly mounted on both sides of the wide surface of the positioning plate; one end of the adjusting screw passes through the surface of the positioning plate and abuts against the wide surface of the moving plate; the wide surface of the moving plate away from the positioning plate is fixedly connected to one end of the elastic element, and the other end of the first elastic element is fixedly connected to the fixed end of the caster wheel.
[0009] Furthermore, the surface of the movable plate is provided with through holes that match the guide post, and each of the through holes is symmetrically distributed about the adjusting screw.
[0010] Furthermore, the end of the limiting joint is provided with an insulating sleeve.
[0011] Beneficial effects: The frame structure composed of a stabilizing frame and protective components of this utility model can quickly form a protective structure on the new outer periphery of the iron core under test before vibration testing, thereby stabilizing the state of the iron core under test during vibration testing. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of an auxiliary device for transformer core vibration testing according to an embodiment of the present invention;
[0013] Figure 2 This is a side view of an auxiliary device for transformer core vibration testing according to an embodiment of the present invention.
[0014] Figure 3 for Figure 2A magnified structural diagram of part A in the middle. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the present invention.
[0016] It should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this patent 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. Therefore, they should not be construed as limitations on this patent.
[0017] Figure 1 This is a schematic diagram of an auxiliary device for transformer core vibration testing according to an embodiment of the present invention.
[0018] Reference Figure 1 An auxiliary device for transformer core vibration testing according to an embodiment of the present invention includes: a stabilizing frame 1, a moving assembly 2, multiple sensors 3, and a protective assembly 4. The stabilizing frame 1 has a limiting cavity 6 that matches the core 5 to be tested. Multiple sensors 3 are fixedly mounted on the outer circumferential surface of the stabilizing frame 1. Each group of moving assemblies 2 is respectively located on one of the opposite wide surfaces of the stabilizing frame 1, and the moving assemblies 2 are symmetrically distributed about the core 5 to be tested. The protective assembly 4 is rotatably mounted on one of the narrow surfaces of the stabilizing frame 1 to prevent the core 5 to be tested from dislodging from the limiting cavity 6 during the vibration test.
[0019] Specifically, the stabilizing frame 1 includes two side baffles 11, multiple connecting plates 12, and side rails 13. Each side baffle 11 is parallel to each other and connected to each other via connecting plates 12 to form a portal frame-like structure. Each connecting plate 12 is fixedly connected at both ends to the narrow side of one of the side baffles 11, and each connecting plate 12 is perpendicular to each side baffle 11. The connecting plates 12 are spaced apart between the side baffles 11, and the sensor 3 passes through the surface of the connecting plate 12 into the limiting cavity 6. Preferably, in one embodiment, the sensor 3 is mounted on the surface of the connecting plate 12 located at the center line. In other embodiments, the sensor 3 is mounted on the surface of each connecting plate 12. The sensor 3 is detachably mounted on the connecting plate 12 via a threaded connection. Before vibration testing, the operator can adjust the depth of the sensor 3 entering the limiting cavity 6 by twisting the sensor 3, thereby ensuring that the sensor 3 abuts against the iron core 5 under test during each vibration test. Each sensor 3 is connected to a computing device, and each sensor 3 is distributed on various surfaces of the iron core 5 under test to balance the data collected by each sensor 3.
[0020] Figure 2 This is a side view of an auxiliary device for transformer core vibration testing according to an embodiment of the present invention. Figure 3 for Figure 2 A magnified structural diagram of part A in the middle.
[0021] Specifically, refer to Figure 2 and Figure 3 The protective component 4 includes a rotating base 41, a limiting joint 42, and a magnetic element 43. The rotating base 41 includes a first part 411 and a second part 412 that are rotatably connected. Both the first part 411 and the second part 412 are plate-shaped. The limiting joint 42 is fixedly provided on the surface of the first part 411, and the connecting shaft between the first part 411 and the second part 412 is fixedly provided on the narrow surface of the side baffle 11. Furthermore, a magnetic element 43 is fixedly provided on the narrow surface of each side baffle 11. The limiting joint 42 is located on the side of the first part 411 away from the second part 412, and the second part 412 is fixedly provided on one of the connecting plates 12. The magnetic element 43 is a magnetic block such as a magnet, and the fixed connection between the second part 412 and the connecting plate 12 is by welding or similar methods.
[0022] In one embodiment, the rotating seat 41 is a hinge plate, and the first part 411 and the second part 412 are respectively one of the hinge plates of the hinge plate. The connecting shaft between the first part 411 and the second part 412 is a pin. During vibration testing, the operator rotates the first part 411 to bring the limiting joint 42 into contact with one of the narrow faces of the iron core 5 under test. At this time, the magnetic element 43 is attracted to one side of the narrow face of the stabilizer 1 by magnetic force, thereby stabilizing the connection between the rotating seat 41 and the stabilizer 1, and ensuring that the iron core 5 under test in the limiting cavity 6 will not shift within the limiting cavity 6. Furthermore, in order to avoid interference of the limiting joint 42 with the vibration test, in another embodiment, the end of the limiting joint 42 is also provided with an insulating sleeve made of rubber or other materials.
[0023] Specifically, each movable assembly 2 includes: a positioning plate 21, two guide posts 22, an adjusting screw 23, a movable plate 25, and a first elastic element. The positioning plate 21 is fixedly mounted on the wide surface of the side baffle 11, and a guide post 22 is fixedly mounted on each side of the positioning plate 21. Each guide post 22 is parallel to each other, and the side of each guide post 22 away from the positioning plate 21 extends through the movable plate 25. The movable plate 25 is movably mounted on the guide posts 22, and the movable plate 25 is parallel to the positioning plate 21. The surface of the movable plate 25 has through holes 241 that match the guide posts 22, and the wide surface of the movable plate 25 away from the positioning plate 21 is fixedly connected to one end of the first elastic element. The other end of the first elastic element is fixedly connected to the fixed end of the caster wheel 26. One end of the adjusting screw 23 passes through the surface of the positioning plate 21 and abuts against the surface of the moving plate 25. By adjusting the distance between the adjusting screw 23 and the moving plate 25, the height difference between the caster wheel 26 and the end of the side baffle 11 can be changed.
[0024] Before conducting the vibration test, the operator first places the stabilizer 1 on the outer periphery of the iron core 5 to be tested, and then rotates the first part 411 so that the first part 411 is magnetically fixed to the narrow surface of one side of the two side baffles 11, thereby limiting the iron core 5 to be tested inside the limiting cavity 6. After ensuring that each sensor 3 is in contact with the surface of the iron core 5 to be tested, the vibration test begins. During this process, each sensor 3 is in contact with the iron core 5 to be tested, thereby further limiting the position of the iron core 5 to be tested.
[0025] In summary, this utility model, through a frame structure composed of a stabilizing frame and protective components, can quickly form a protective structure on the new outer periphery of the iron core under test before vibration testing, thereby stabilizing the state of the iron core under test during vibration testing.
[0026] The above description describes specific embodiments of the utility model. Other embodiments are within the scope of the appended claims.
[0027] The terms “exemplary,” “example,” etc., used throughout this specification mean “serving as an example, instance, or illustration” and do not imply “preferred” or “advantageous” than other embodiments. Detailed descriptions are included for the purpose of providing an understanding of the described techniques. However, these techniques can be practiced without these detailed descriptions. In some instances, well-known structures and apparatuses are shown in block diagram form to avoid obscuring the concepts of the described embodiments.
[0028] The optional embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present utility model are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present utility model, various simple modifications can be made to the technical solutions of the embodiments of the present utility model, and these simple modifications all fall within the protection scope of the embodiments of the present utility model.
[0029] The foregoing description of this specification is provided to enable any person skilled in the art to implement or use the content of this specification. Various modifications to the content of this specification will be apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of protection of this specification. Therefore, this specification is not limited to the examples and designs described herein, but is consistent with the widest scope of the principles and novel features disclosed herein.
Claims
1. An auxiliary device for transformer core vibration testing, characterized in that, include: The device comprises a stabilizer (1), a moving component (2), multiple sensors (3), and a protective component (4). The stabilizer (1) has a limiting cavity (6) that matches the iron core (5) to be tested. Multiple sensors (3) are fixedly arranged on the outer periphery of the stabilizer (1). Each group of moving components (2) is respectively arranged on one of the opposite wide surfaces of the stabilizer (1), and each group of moving components (2) is symmetrically distributed about the iron core (5) to be tested. The protective component (4) is rotatably arranged on one of the narrow surfaces of the stabilizer (1) to limit the iron core (5) to be tested within the limiting cavity (6) during vibration testing.
2. The auxiliary device for transformer core vibration testing according to claim 1, characterized in that, The stabilizer (1) includes: two side baffles (11), multiple connecting plates (12), and side rails (13); each of the side baffles (11) is connected to each other through the connecting plates (12) to form the limiting cavity (6) between the side baffles (11); each of the connecting plates (12) is arranged at intervals between the side baffles (11), and the sensor (3) is fixedly provided on the connecting plate (12); the side rails (13) are fixedly provided on another narrow surface of the side baffles (11), and the sensor (3) is fixedly provided on the wide surface of the side rails (13).
3. The auxiliary device for transformer core vibration testing according to claim 2, characterized in that, The protective assembly (4) includes: a rotating seat (41), a limiting joint (42), and a magnetic element (43); the rotating seat (41) includes a first part (411) and a second part (412) that are rotatably connected; the limiting joint (42) is vertically fixed on the surface of the first part (411), and the connecting shaft of the first part (411) and the second part (412) is fixed on the narrow surface of the side baffle (11); the magnetic element (43) is fixed on the narrow surface of the side baffle (11), and when the rotating seat (41) rotates, one of the hinge plates of the rotating seat (41) is magnetically connected to the stabilizer (1) through the magnetic element (43), and the end of the limiting joint (42) abuts against the surface of the iron core (5) to be tested.
4. The auxiliary device for transformer core vibration testing according to claim 3, characterized in that, Each set of the moving components (2) includes: a positioning plate (21), two guide posts (22), an adjusting screw (23), a moving plate (24), a first elastic element (25), and a universal wheel (26); the positioning plate (21) is fixedly mounted on the wide surface of the side baffle (11), and the guide posts (22) are fixedly mounted on both sides of the wide surface of the positioning plate (21); one end of the adjusting screw (23) passes through the surface of the positioning plate (21) and abuts against the wide surface of the moving plate (24); the wide surface of the moving plate (24) away from the positioning plate (21) is fixedly connected to one end of the elastic element, and the other end of the first elastic element (25) is fixedly connected to the fixed end of the universal wheel (26).
5. An auxiliary device for transformer core vibration testing according to claim 4, characterized in that, The surface of the movable plate (24) is provided with through holes that match the guide post (22), and each of the through holes is symmetrically distributed about the adjusting screw (23).
6. An auxiliary device for transformer core vibration testing according to claim 4, characterized in that, The end of the limiting joint (42) is provided with an insulating sleeve.