Transformer shielding assembly and transformer

Abstract

The utility model belongs to the technical field of transformers, and discloses a transformer shielding assembly and a transformer. The transformer shielding assembly comprises a clamping structure assembly and a shielding unit, the clamping structure assembly comprises a first pull rod, a second pull rod and at least two clamping pieces, a silicon steel sheet group is placed between the two clamping pieces, the two ends of the first pull rod penetrate through the clamping pieces, and a first fastener is used for locking the first pull rod and the clamping pieces; the two ends of the second pull rod penetrate through the corresponding drawstring bases, and the second fastener is used for locking the second pull rod and the drawstring bases. And the shielding unit is connected with the clamping structure assembly and is used for shielding leakage magnetic flux generated by winding leads of the silicon steel sheet group. According to the utility model, the influence of leakage magnetic flux generated by the lead on the clamping structure assembly of the transformer can be shielded, the temperature rise of the clamping structure assembly is reduced, and the energy-saving operation of the transformer is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to transformer shielding components and transformers. Background Technology

[0002] Transformers are key equipment in power systems, significantly impacting power supply quality and system stability. By altering the turns ratio of the primary and secondary windings, voltage can be increased or decreased to meet the voltage requirements of various electrical devices. The core material of a transformer is typically silicon steel sheets, while the winding material uses highly conductive copper or aluminum wires. The silicon steel sheet assembly is fixed inside a metal clamping structure, with the winding leads located on the outside of the clamping structure.

[0003] In ultra-high voltage, large-capacity power transformers, the large current flowing through the winding leads of silicon steel sheet groups (i.e., the wire ends of the conductor windings led out from the silicon steel sheet groups) will generate a large amount of leakage flux. First, this will cause large eddy current losses induced in the clamping structure components, resulting in local overheating and endangering the safe operation of the product. Second, eddy current losses are an important component of load losses. Large eddy current losses generated in the clamping structure components will lead to high load losses and energy-inefficient operation of the product. Utility Model Content

[0004] The purpose of this invention is to provide a transformer shielding assembly and a transformer that can shield the leakage flux generated by the winding leads of the silicon steel sheet assembly from the influence of the clamping structure assembly, reduce the temperature rise of the clamping structure assembly, and help the transformer operate in an energy-saving manner.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Transformer shielding assembly, including:

[0007] A clamping structure assembly includes a first pull rod, a second pull rod, and at least two clamps. A silicon steel sheet assembly is placed between the two clamps. The two ends of the first pull rod pass through the first ends of the two clamps and are located at one end of the silicon steel sheet assembly. The two ends of the first pull rod are respectively connected to a first fastener, which is used to lock the first pull rod and the clamps. A pull strap seat is provided at the second end of each clamp. The two ends of the second pull rod pass through the corresponding pull strap seat and are located at the other end of the silicon steel sheet assembly. The two ends of the second pull rod are respectively connected to a second fastener, which is used to lock the second pull rod and the pull strap seat.

[0008] A shielding unit is connected to the clamping structure assembly, and the shielding unit is used to shield the leakage flux generated by the winding leads of the silicon steel sheet assembly.

[0009] As an optional solution for the transformer shielding assembly, the shielding unit includes:

[0010] A shielding plate, which is connected to the clamping structure assembly and covers the outside of the clamping structure assembly.

[0011] As an optional solution for the transformer shielding assembly, the shielding unit further includes:

[0012] A shielding rod, which is connected to the shielding plate and disposed on the side of the shielding plate facing the clamping structure assembly.

[0013] As an optional solution for the transformer shielding assembly, the shielding rod is arranged circumferentially along the edge of the shielding plate.

[0014] As an optional solution for the transformer shielding assembly, one end of the shielding plate is threadedly connected to the pull belt seat via a third fastener, and the other end of the shielding plate is used to cover the pull belt seat. The shielding plate is used to shield the leakage flux generated by the winding leads of the silicon steel sheet assembly.

[0015] As an optional solution for the transformer shielding assembly, the shielding plate includes a first folding plate, a second folding plate, and a third folding plate connected in sequence. The first folding plate is bent along the direction close to the second pull rod. The second folding plate extends along a first direction and wraps around the pull strap seat. The third folding plate extends along a second direction and wraps around the upper end face of the pull strap seat. The first direction is perpendicular to the second direction. The third folding plate is connected to the upper end face of the pull strap seat.

[0016] As an optional solution for the transformer shielding assembly, one end of the shielding plate is connected to the clamp, and the other end of the shielding plate is used to cover the pull strap seat. The shielding plate is used to shield the leakage flux generated by the winding leads of the silicon steel sheet group.

[0017] As an optional solution for the transformer shielding assembly, the outer wall of the clamp is provided with a third connecting hole. The shielding plate includes a first folding plate, a second folding plate, a third folding plate, and a fourth folding plate connected in sequence. The first folding plate is bent along the direction close to the second pull rod. The second folding plate extends along a first direction and wraps around the pull strap seat. The third folding plate extends along a second direction and wraps around the upper end face of the pull strap seat. The fourth folding plate extends along the first direction and fits against the outer wall of the clamp. The first direction is perpendicular to the second direction. The fourth folding plate is provided with a fourth connecting hole. A second fastener passes through the fourth connecting hole and connects to the third connecting hole.

[0018] As an optional solution for the transformer shielding assembly, the outer wall of the clamp is provided with a first insertion portion. The shielding plate includes a first folding plate, a second folding plate, a third folding plate, and a fourth folding plate connected in sequence. The first folding plate is bent along the direction close to the second pull rod. The second folding plate extends along a first direction and wraps around the pull strap seat. The third folding plate extends along a second direction and wraps around the upper end face of the pull strap seat. The fourth folding plate extends along the first direction and fits against the outer wall of the clamp. The first direction is perpendicular to the second direction. The fourth folding plate is provided with a second insertion portion, and the first insertion portion is inserted into the second insertion portion.

[0019] The transformer includes a silicon steel sheet assembly and the aforementioned transformer shielding assembly, wherein the silicon steel sheet assembly is disposed between two clamps of the transformer shielding assembly.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The transformer shielding assembly provided by this utility model installs the silicon steel sheet assembly of the transformer between two clamping members of a clamping structure assembly. The distance between the two clamping members can be changed by adjusting the depth of the first pull rod screwed into the clamping member and the depth of the second pull rod screwed into the pull belt seat. The use of first and second fasteners further enhances the stable clamping of the silicon steel sheet assembly. Connecting the shielding unit to the clamping structure assembly effectively shields the large leakage flux generated by the high current flowing through the winding leads of the silicon steel sheet assembly, eliminating the influence of the leakage flux generated by the winding leads of the silicon steel sheet assembly on the clamping structure assembly. This avoids large eddy current losses induced in the clamping structure assembly, reduces the temperature rise of the clamping structure assembly, reduces transformer load losses, and contributes to energy-saving operation of the transformer. Attached Figure Description

[0022] Figure 1 This is an assembly diagram of the transformer in Embodiment 1 of this utility model;

[0023] Figure 2 This is an assembly diagram of the transformer shielding assembly in Embodiment 1 of this utility model;

[0024] Figure 3 This is a schematic diagram of the pull strap seat in Embodiment 1 of this utility model;

[0025] Figure 4 This is a schematic diagram of the shielding plate in Embodiment 1 of this utility model;

[0026] Figure 5 This is a schematic diagram of the shielding unit in Embodiment 1 of this utility model;

[0027] Figure 6 This is a schematic diagram of the first assembly of the transformer in Embodiment 2 of this utility model;

[0028] Figure 7 This is a schematic diagram of the first structure of the shielding plate in Embodiment 2 of this utility model;

[0029] Figure 8 This is a schematic diagram of the first structure of the shielding unit in Embodiment 2 of this utility model (the third fastener is not shown);

[0030] Figure 9 This is a schematic diagram of the first structure of the clamp in Embodiment 2 of this utility model;

[0031] Figure 10 This is a second assembly diagram of the transformer in Embodiment 2 of this utility model;

[0032] Figure 11 This is a schematic diagram of the second structure of the shielding plate in Embodiment 2 of this utility model;

[0033] Figure 12 This is a schematic diagram of the second structure of the shielding unit in Embodiment 2 of this utility model (the fourth fastener is not shown);

[0034] Figure 13 This is a schematic diagram of the second structure of the clamp in Embodiment 2 of this utility model.

[0035] In the picture:

[0036] 1. Clamping structure assembly; 2. Shielding unit; 3. Silicon steel sheet assembly;

[0037] 11. First pull rod; 12. Second pull rod; 13. Clamp; 131. Third connecting hole; 132. First insertion part; 14. Pull strap seat; 141. First connecting hole; 15. First fastener; 16. Second fastener;

[0038] 21. Shielding plate; 211. First folding plate; 212. Second folding plate; 213. Third folding plate; 2131. Second connecting hole; 214. Fourth folding plate; 2141. Fourth connecting hole; 2142. Second plug-in part; 22. Shielding rod; 23. Third fastener; 24. Fourth fastener. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] To shield the leakage flux generated by the winding leads of the silicon steel sheet assembly from the impact on the transformer's clamping structure components, reduce the temperature rise of the clamping structure components, and contribute to energy-efficient transformer operation, this embodiment provides a transformer shielding component and a transformer. The following description, in conjunction with... Figures 1 to 13 The specific content of this embodiment will be described in detail. It should be noted that the first direction mentioned in this embodiment is... Figure 1 The Y direction in this embodiment, and the second direction mentioned in this embodiment are Figure 1 The X direction is perpendicular to the Y direction.

[0044] Example 1

[0045] like Figures 1 to 5As shown, the transformer shielding assembly in this embodiment includes a clamping structure assembly 1 and a shielding unit 2. The clamping structure assembly 1 is made of metal and is easily affected by the electromagnetic interference of the winding leads of the silicon steel sheet assembly. The clamping structure assembly 1 includes a first pull rod 11, a second pull rod 12, and at least two clamps 13. The silicon steel sheet assembly 3 is placed between the two clamps 13. The two ends of the first pull rod 11 pass through the upper ends of the two clamps 13 and are located above the silicon steel sheet assembly 3. The two ends of the first pull rod 11 are respectively connected to a first fastener 15, which is used to lock the first pull rod 11 and the clamps 13. Each clamp 13 has a pull strap seat 14 at its lower end. The two ends of the second pull rod 12 pass through the corresponding pull strap seat 14 and are located below the silicon steel sheet assembly 3. The two ends of the second pull rod 12 are respectively connected to a second fastener 16, which is used to lock the second pull rod 12 and the pull strap seat 14. Specifically, in this embodiment, the first pull rod 11 and the second pull rod 12 have threaded sections at both ends, and the first fastener 15 and the second fastener 16 are nuts. The distance between the two clamps 13 can be adjusted by changing the depth to which the first pull rod 11 is screwed into the clamp 13 and the depth to which the second pull rod 12 is screwed into the pull strap seat 14. The shielding unit 2 is connected to the clamping structure assembly 1 and covers the outside of the clamping structure assembly 1. The shielding unit 2 is used to shield the influence of the leakage magnetic flux generated by the winding leads of the silicon steel sheet group 3 on the clamping structure assembly 1.

[0046] The transformer shielding assembly provided by this utility model installs the silicon steel sheet assembly 3 of the transformer between two clamping members 13 of the clamping structure assembly 1. The distance between the two clamping members 13 can be changed by adjusting the depth of the first pull rod 11 screwed into the clamping member and the depth of the second pull rod 12 screwed into the pull belt seat. The first fastener 15 and the second fastener 16 are used to improve the stable clamping of the silicon steel sheet assembly 3. The shielding unit 2 is placed on the outside of the clamping structure assembly 1 to effectively shield the large leakage flux generated by the large current flowing through the winding leads of the silicon steel sheet assembly 3, eliminate the influence of the leakage flux generated by the winding leads of the silicon steel sheet assembly 3 on the clamping structure assembly 1 of the transformer, avoid the clamping structure assembly 1 from inducing large eddy current losses, reduce the temperature rise of the clamping structure assembly 1, reduce the transformer load loss, and help the transformer operate in an energy-saving manner.

[0047] For example, when it is necessary to shield the entire clamping structure assembly 1, the shielding unit 2 can completely enclose the entire clamping structure assembly 1. When it is necessary to magnetically shield the components of the clamping structure assembly 1 (e.g., the first pull rod 11, the second pull rod 12, the clamp 13, or the pull strap seat 14), the shielding unit 2 can selectively enclose the corresponding components (e.g., the first pull rod 11, the second pull rod 12, the clamp 13, or the pull strap seat 14).

[0048] Furthermore, the shielding unit 2 includes a shielding plate 21, which is connected to and covers the outside of the clamping structure assembly 1. The shielding plate 21 of the shielding unit 2 effectively isolates and blocks external electromagnetic interference signals from the winding leads of the silicon steel sheet group 3, ensuring that the clamping structure assembly 1 operates in a relatively clean and interference-free environment.

[0049] Furthermore, the shielding unit 2 also includes a shielding rod 22, which is connected to the shielding plate 21 and positioned on the side of the shielding plate 21 facing the clamping structure assembly 1, optimizing the shielding structure. As an additional shielding element, the shielding rod 22 further enhances the shielding plate 21's ability to isolate the leakage magnetic flux generated by the winding leads of the silicon steel sheet assembly 3. When the shielding plate 21 has tiny gaps or holes, the shielding rod 22 can fill these gaps, forming a more complete shielding layer and reducing electromagnetic wave leakage. The placement of the shielding rod 22 makes the shielding effect inside the shielding plate 21 more uniform. In some cases, the shielding plate 21 may exhibit differences in shielding effect at different locations due to limitations in manufacturing processes or material properties. The introduction of the shielding rod 22 can balance these differences, ensuring consistent shielding effect throughout the entire shielding area. The shielding rod 22 not only serves a shielding function but also acts as a supporting structure, increasing the overall stability of the shielding plate 21. In complex electromagnetic environments, the shielding plate 21 may be affected by various external forces, such as wind and vibration. The supporting function of the shielding rods 22 can reduce the impact of external forces on the shielding plate 21, ensuring its stable shielding performance. By adjusting the number, position, and length of the shielding rods 22, different shielding requirements can be flexibly adapted. In some applications, the shielding rods 22 are typically designed with easy installation and disassembly structures (bolted connections, snap-fit ​​connections, or plug-in connections), making the installation, maintenance, and upgrade of the shielding plate 21 more convenient. When it is necessary to adjust the shielding effect or replace the shielding material, the shielding rods 22 can be easily disassembled and reinstalled without damaging the entire shielding structure. In other applications, the shielding rods 22 can also be welded to the shielding plate 21, or the shielding rods 22 can be placed on the outside of the shielding plate 21.

[0050] Furthermore, the shielding rod 22 is circumferentially arranged along the edge of the shielding plate 21. The outer edge of the shielding plate 21 is often one of the main channels for electromagnetic wave leakage. Due to the edge effect, electromagnetic waves easily leak and diffract at the edge of the shielding plate 21. By extending the shielding rod 22 along the outer edge of the shielding plate 21, these leaked electromagnetic waves can be effectively blocked, thereby enhancing the overall shielding effect of the shielding plate 21. The arrangement of the shielding rod 22 can fill the gaps and voids at the edge of the shielding plate 21, making the shielding structure more complete. This completeness is crucial to preventing electromagnetic waves from bypassing the edge of the shielding plate 21 and penetrating into the shielded area.

[0051] For example, the shielding rod 22 is an aluminum rod. Aluminum, as a conductive material, has excellent electromagnetic shielding properties. When used as the shielding rod 22, the aluminum rod effectively blocks or weakens the propagation of electromagnetic waves, thereby protecting the surrounding clamping structure assembly 1 from electromagnetic interference. Aluminum has a relatively low density, about one-third that of steel, which allows the aluminum rod to provide good shielding while being lightweight. This lightweight and high-strength characteristic gives the aluminum rod a significant advantage in applications requiring weight reduction while maintaining shielding performance. Aluminum readily forms a dense aluminum oxide film in the air, which prevents further oxidation, thus giving the aluminum rod good corrosion resistance. This allows the aluminum rod to maintain stable shielding performance even in humid and highly corrosive environments, extending its service life.

[0052] For example, such as Figures 2 to 5 As shown, one end of the shielding plate 21 is threadedly connected to the pull strap seat 14 via a third fastener 23, and the other end of the shielding plate 21 is used to cover the pull strap seat 14. The shielding plate 21 is used to shield the leakage magnetic flux generated by the winding leads of the silicon steel sheet group 3. In actual use, the winding leads of the silicon steel sheet group 3 are generally located in the lower half of the transformer, and the leakage magnetic flux generated by the winding leads of the silicon steel sheet group 3 will act on the pull strap seat 14. The main function of the shielding plate 21 is to provide electromagnetic shielding. By threading the upper end of the shielding plate 21 to the pull strap seat 14 via the third fastener 23, and ensuring that the lower end of the shielding plate 21 can cover the pull strap seat 14 and the second pull rod 12, a relatively closed shielding space can be formed, effectively blocking or reducing electromagnetic wave leakage and interference, and avoiding the influence of the leakage magnetic flux generated by the winding leads of the silicon steel sheet group 3 on the pull strap seat 14 and the second pull rod 12. The shielding plate 21 can be flexibly adjusted according to different application scenarios. For example, the size and shape of the shielding plate 21 can be customized according to the dimensions and positions of the pull strap seat 14 and the second pull rod 12 to meet specific shielding requirements.

[0053] Optionally, the shielding plate 21 includes a first folding plate 211, a second folding plate 212, and a third folding plate 213 connected in sequence. The first folding plate 211 is bent along the direction close to the second pull rod 12. The second folding plate 212 extends along a first direction and wraps around the pull strap seat 14. The third folding plate 213 extends along a second direction and wraps around the upper end face of the pull strap seat 14. The first direction is perpendicular to the second direction. The third folding plate 213 is connected to the upper end face of the pull strap seat 14. The upper end face of the pull strap seat 14 is provided with a plurality of first connecting holes 141, and the third folding plate 213 is provided with a plurality of second connecting holes 2131. The third fastener 23 passes through the second connecting holes 2131 and connects to the first connecting holes 141. The first connecting holes 141 are located on the upper end face of the pull strap seat 14 and are used to connect with the shielding plate 21. These holes provide a channel for the third fastener 23 to pass through, thereby achieving a secure connection between the pull strap seat 14 and the shielding plate 21. The second connecting hole 2131 is provided on the third fold plate 213 of the shielding plate 21, and the second connecting hole 2131 corresponds to the first connecting hole 141. When the third fastener 23 (such as bolts, screws, etc.) passes through these holes and is fastened to the first connecting hole 141 on the pull strap seat 14, the shielding plate 21 is stably fixed on the pull strap seat 14, ensuring that the shielding plate 21 will not loosen or fall off during long-term use. The number and position of the first connecting hole 141 and the second connecting hole 2131 can also be adjusted according to actual needs to meet different connection and fixing requirements. The first fold plate 211, the second fold plate 212 and the third fold plate 213 are connected in sequence to form a multi-faceted shielding structure. This structure can more effectively block or weaken the propagation of electromagnetic waves. The first fold plate 211 is bent in the direction close to the second pull rod 12, which helps to better fit the shape of the pull strap seat 14 and the second pull rod 12, thereby enhancing the shielding effect. The second fold plate 212 and the third fold plate 213 extend in different directions, further expanding the coverage area of ​​the shielding plate 21 and improving its shielding performance. The multi-fold design of the shielding plate 21 allows it to adapt to different shapes and sizes of the pull strap seat 14 and the second pull rod 12. By adjusting the length and angle of the fold plates, it can be ensured that the shielding plate 21 fits tightly against the pull strap seat 14 and the second pull rod 12, providing effective shielding protection.

[0054] This embodiment also provides a transformer, which includes a silicon steel sheet assembly 3 and the aforementioned transformer shielding assembly. The silicon steel sheet assembly 3 is disposed between two clamps 13 of the transformer shielding assembly. By adjusting the first pull rod 11 and the second pull rod 12 of the clamping structure assembly 1, the silicon steel sheet assembly 3 can be firmly clamped by the two clamps 13. The silicon steel sheets have good magnetic permeability, which can effectively guide the magnetic field lines to flow along a predetermined path. In the transformer shielding assembly, the shielding unit 2 can form a magnetic shielding layer, reducing the electromagnetic interference of leakage flux on the clamping structure assembly 1. At the same time, the high magnetic permeability of the silicon steel sheets can also reduce magnetic reluctance, making the magnetic field lines more concentrated inside the transformer and improving the electromagnetic efficiency of the transformer. The silicon steel sheets also have low hysteresis loss and eddy current loss. In a transformer, these losses lead to energy loss and temperature rise. By using shielding unit 2 as a shielding layer, the shielding plate 21 and shielding rod 22 of shielding unit 2 can block the large leakage flux generated by the large current flowing through the winding leads of the silicon steel sheet assembly 3, preventing strong leakage flux from linking with the clamping structure component 1 of the power transformer. This prevents the clamping structure component 1 inside the transformer from inducing large eddy current losses, thus avoiding local overheating and endangering the safe operation of the product. Secondly, eddy current losses are an important component of load losses. The clamping structure component 1 inside the transformer does not generate large eddy current losses, which will not increase the product's load losses and help the transformer operate energy-savingly, thereby improving the transformer's energy efficiency and reliability. The arrangement of silicon steel sheet assembly 3 can also have a positive impact on the transformer's heat dissipation performance. Because silicon steel sheets have good thermal conductivity, they can help transfer the heat generated inside the transformer to the external environment more quickly, thereby reducing the transformer's temperature rise and extending its service life. Silicon steel sheet assembly 3 can also serve as a structural support for the transformer. By rationally arranging silicon steel sheet assembly 3, the overall strength and stability of the transformer can be enhanced, enabling it to better withstand external pressure and vibration. The design of silicon steel sheet assembly 3 is flexible and can be adjusted and optimized according to different application scenarios. For example, in applications requiring higher voltage transformation, the thickness or number of silicon steel sheet assembly 3 can be increased; in applications requiring better heat dissipation performance, the layout and shape of silicon steel sheet assembly 3 can be optimized.

[0055] Example 2

[0056] This embodiment provides a transformer shielding assembly. Compared with Embodiment 1, the basic structure of the transformer shielding assembly provided in this embodiment is the same as that in Embodiment 1, except that the connection method of the shielding plate 21 is different. This embodiment will not describe the structure that is the same as that in Embodiment 1 again.

[0057] For example, such as Figures 6 to 13As shown, one end of the shielding plate 21 is connected to the clamp 13, and the other end of the shielding plate 21 is used to cover the pull strap seat 14. The shielding plate 21 is used to shield the leakage magnetic flux generated by the winding leads of the silicon steel sheet assembly 3. The shielding plate 21 forms a relatively closed shielding space, which not only effectively blocks or reduces electromagnetic interference to the pull strap seat 14, but also provides additional protection against corrosion or damage from the external environment. The connection between one end of the shielding plate 21 and the clamp 13 can be a threaded connection or a plug-in connection. Threaded connections or plug-in connections are a strong and stable connection method that can provide sufficient mechanical strength to ensure that the connection between the shielding plate 21 and the clamp 13 will not loosen or fall off due to vibration or external force. This stable connection is crucial for maintaining the continuity and reliability of the shielding effect. The design of threaded connections or plug-in connections makes the installation and removal of the shielding plate 21 relatively simple and convenient. When it is necessary to replace or maintain the shielding plate 21, it can be easily achieved by simply rotating the threaded connection part or plugging and unplugging the plug-in part. This easy-to-install and easy-to-maintain feature improves the maintainability and flexibility of the equipment.

[0058] Optionally, such as Figures 6 to 9As shown, the outer wall of the clamp 13 is provided with several third connecting holes 131. The shielding plate 21 includes a first folding plate 211, a second folding plate 212, a third folding plate 213, and a fourth folding plate 214 connected in sequence. The first folding plate 211 is bent along the direction close to the second pull rod 12. The second folding plate 212 extends along the first direction and wraps around the pull strap seat 14. The fourth folding plates 214 all extend along the first direction and fit against the outer wall of the clamp 13. The third folding plate 213 extends along the second direction and wraps around the upper end face of the pull strap seat 14. The first direction is perpendicular to the second direction. The bending of the first folding plate 211 along the direction close to the second pull rod 12 helps to better fit the shape of the pull strap seat 14 and the second pull rod 12, thereby enhancing the shielding effect. The second folding plate 212 and the third folding plate 213 extend in different directions, and the fourth folding plate 214 and the third folding plate 213 extend in different directions, further expanding the coverage area of ​​the shielding plate 21 and improving the shielding performance. The fourth fold plate 214 is provided with several fourth connecting holes 2141, and the fourth fastener 24 passes through the fourth connecting holes 2141 to connect with the third connecting hole 131. By providing the third connecting hole 131 on the outer wall of the clamp 13 and providing the corresponding fourth connecting hole 2141 on the fourth fold plate 214 of the shielding plate 21, and then connecting them with the fourth fastener 24 (such as bolts, screws, etc.), the connection between the shielding plate 21 and the clamp 13 can be ensured to be firm and reliable. This multi-point connection method can effectively resist vibration and external force, and prevent the shielding plate 21 from loosening or falling off. The multi-fold plate design of the shielding plate 21 (first fold plate 211, second fold plate 212, third fold plate 213 and fourth fold plate 214) forms a multi-faceted shielding structure, which can more effectively block or weaken the propagation of electromagnetic waves. By tightly fixing the shielding plate 21 to the clamp 13, a relatively closed shielding space can be formed, thereby reducing leakage flux and electromagnetic interference, and improving the electromagnetic shielding effect. The multi-fold design of the shielding plate 21 allows it to adapt to clamps 13, strap seats 14, and second pull rods 12 of different shapes and sizes. By adjusting the length and angle of the folds, the shielding plate 21 can be ensured to fit tightly against the clamp 13, providing effective shielding protection. Meanwhile, the number and position of the fourth connecting holes 2141 can also be adjusted according to actual needs to meet different connection and fixing requirements.

[0059] Optionally, such as Figures 10 to 13As shown, the outer wall of the clamp 13 is provided with several first insertion portions 132. The shielding plate 21 includes a first folding plate 211, a second folding plate 212, a third folding plate 213, and a fourth folding plate 214 connected in sequence. The first folding plate 211 is bent along the direction close to the second pull rod 12. The second folding plate 212 extends along a first direction and wraps around the pull strap seat 14. The fourth folding plate 214 extends along the first direction and fits against the outer wall of the clamp 13. The third folding plate 213 extends along a second direction and wraps around the upper end face of the pull strap seat 14. The first direction is perpendicular to the second direction. The bending of the first folding plate 211 along the direction close to the second pull rod 12 helps to better fit the shape of the pull strap seat 14 and the second pull rod 12, thereby enhancing the shielding effect. The second folding plate 212 and the third folding plate 213 extend in different directions, and the fourth folding plate 214 and the third folding plate 213 extend in different directions, further expanding the coverage area of ​​the shielding plate 21 and improving the shielding performance. The fourth folding plate 214 is provided with several second insertion portions 2142, and the first insertion portion 132 is inserted into the second insertion portions 2142. The design of the first insertion portion 132 and the second insertion portion 2142 allows for quick connection between the clamp 13 and the shielding plate 21. Compared with traditional threaded or welding connections, the insertion connection is simpler and requires no complicated tools or operating procedures. At the same time, the design of the insertion portion usually takes into account the stability of the connection, ensuring that the clamp 13 and the shielding plate 21 are not easily loosened or detached under vibration or external force. Optionally, in this embodiment, the first insertion portion 132 can be a socket, and the second insertion portion 2142 can be a plate that can be inserted into the socket. The insertion connection design makes the installation and removal of the shielding plate 21 easier. When the shielding plate 21 needs to be replaced or maintained, the staff can quickly remove the old shielding plate 21 and insert the new shielding plate 21, thereby greatly saving installation and maintenance time. The multi-fold design of the shielding plate 21 (first fold 211, second fold 212, third fold 213, and fourth fold 214) forms a multi-faceted shielding structure, which can more effectively block or weaken the propagation of electromagnetic waves. By plugging the shielding plate 21 into the clamp 13, it is ensured that the shielding plate 21 fits tightly against the clamp 13, forming a relatively closed shielding space, thereby reducing electromagnetic interference to the clamp 13, the pull strap seat 14, and the second pull rod 12. The plug-in design allows the shielding plate 21 to adapt to clamps 13 of different shapes and sizes. By adjusting the position and number of plug-ins, it is ensured that the shielding plate 21 fits tightly against the clamp 13, providing effective shielding protection. At the same time, this design also allows for the selection of shielding plates 21 of different sizes and shapes according to actual needs in different application scenarios. The plug-in connection method has a lower cost compared to other connection methods (such as welding, threaded connections, etc.). This is mainly because the plug-in connection does not require complex processing or expensive connection materials.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A transformer shield assembly, characterized by, The utility model relates to a clamping structure assembly (1) and shielding unit (2) for shielding leakage magnetic flux of winding lead of silicon steel sheet group (3), the clamping structure assembly (1) comprises first pull rod (11), second pull rod (12) and at least two clamping pieces (13), and the two clamping pieces (13) are used for placing the silicon steel sheet group (3) between two, the first end of two clamping pieces (13) is passed through the both ends of first pull rod (11) and is located in one end of silicon steel sheet group (3), and the both ends of first pull rod (11) are connected with first fastener (15) respectively, and first fastener (15) is used for locking first pull rod (11) and clamping piece (13), and the second end of each clamping piece (13) is provided with pull belt seat (14), and the both ends of second pull rod (12) are passed through corresponding pull belt seat (14) and are located in the other end of silicon steel sheet group (3), and the both ends of second pull rod (12) are connected with second fastener (16) respectively, and second fastener (16) is used for locking second pull rod (12) and pull belt seat (14). The shielding unit (2) is connected with the clamping structure assembly (1), and the shielding unit (2) is used for shielding leakage magnetic flux generated by the winding lead of the silicon steel sheet group (3). The shielding unit (2) comprises:

2. The transformer shield assembly of claim 1, wherein, A shielding plate (21) is connected with the clamping structure assembly (1) and covers the outside of the clamping structure assembly (1). The shielding unit (2) further comprises:

3. The transformer shield assembly of claim 2, wherein, A shielding rod (22) is connected with the shielding plate (21) and is arranged on the side of the shielding plate (21) facing the clamping structure assembly (1). The shielding rod (22) is circumferentially arranged along the edge of the shielding plate (21).

4. The transformer shield assembly of claim 3, wherein, One end of the shielding plate (21) is threadedly connected with the pull belt seat (14) through a third fastener (23), and the other end of the shielding plate (21) is used for covering the pull belt seat (14), and the shielding plate (21) is used for shielding leakage magnetic flux generated by the winding lead of the silicon steel sheet group (3).

5. The transformer shield assembly of any of claims 2-4, wherein, The shielding plate (21) comprises a first folding plate (211), a second folding plate (212), and a third folding plate (213) connected in sequence, the first folding plate (211) is bent in a direction close to the second pull rod (12), the second folding plate (212) extends in a first direction and wraps the pull belt seat (14), the third folding plate (213) extends in a second direction and wraps the upper end surface of the pull belt seat (14), the first direction is perpendicular to the second direction, and the third folding plate (213) is connected with the upper end surface of the pull belt seat (14).

6. The transformer shield assembly of claim 5, wherein, One end of the shielding plate (21) is connected with the clamping piece (13), the other end of the shielding plate (21) is used for covering the pull belt seat (14), and the shielding plate (21) is used for shielding leakage magnetic flux generated by the winding lead of the silicon steel sheet group (3).

7. The transformer shield assembly of any of claims 2-4, wherein, ​ 8. The transformer shield assembly of claim 7, wherein, The outer side wall of the clamping piece (13) is provided with a third connecting hole (131), the shielding plate (21) comprises a first fold plate (211), a second fold plate (212), a third fold plate (213) and a fourth fold plate (214) connected in sequence, the first fold plate (211) is bent in a direction close to the second pull rod (12), the second fold plate (212) extends in a first direction and wraps the pull strap seat (14), the third fold plate (213) extends in a second direction and wraps the upper end surface of the pull strap seat (14), the fourth fold plate (214) extends in the first direction and is attached to the outer side wall of the clamping piece (13), the first direction is perpendicular to the second direction, the fourth fold plate (214) is provided with a fourth connecting hole (2141), and the fourth fastener (24) is connected with the third connecting hole (131) through the fourth connecting hole (2141).

9. The transformer shield assembly of claim 7, wherein, The outer side wall of the clamping piece (13) is provided with a first inserting part (132), the shielding plate (21) comprises a first fold plate (211), a second fold plate (212), a third fold plate (213) and a fourth fold plate (214) connected in sequence, the first fold plate (211) is bent in a direction close to the second pull rod (12), the second fold plate (212) extends in a first direction and wraps the pull strap seat (14), the third fold plate (213) extends in a second direction and wraps the upper end surface of the pull strap seat (14), the fourth fold plate (214) extends in the first direction and is attached to the outer side wall of the clamping piece (13), the first direction is perpendicular to the second direction, the fourth fold plate (214) is provided with a second inserting part (2142), and the first inserting part (132) and the second inserting part (2142) are inserted.

10. Transformer, characterized in that The transformer shielding assembly according to any one of claims 1-9, and a silicon steel sheet group (3) disposed between the two clamping pieces (13) of the transformer shielding assembly.

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