Transformer leakage magnetic shielding device

Abstract

The utility model discloses a transformer magnetic flux leakage shielding device, including mounting bracket, the mounting bracket upper end fixed mounting has transformer, the mounting bracket upper end is provided with shielding subassembly, shielding subassembly includes four shielding plates fixedly connected in the mounting bracket upper end, shielding subassembly still includes four guide rod through and slidingly connected in the mounting bracket upper end, four guide rod upper end common fixedly connected with shielding bin, shielding bin is seted up transmission groove with guide rod, the utility model discloses through adjustable shielding bin and guide rod structure, realize the flexible adjustment of shielding distance, when needing to overhaul transformer, the operator drives round axle sliding through the hand plate, after the limiting state of shielding bin is removed, can fast along guide rod with shielding bin sinking to the mounting bracket below, avoids the situation of scratching line from appearing, and the sufficient space is given for the overhaul work, and the maintenance convenience is improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a transformer leakage magnetic shielding device. Background Technology

[0002] As the core equipment for power transmission, the leakage flux control of transformers has always been a key aspect of engineering design. In existing technologies, transformer leakage flux shielding devices typically use shielding plates or shielding covers with fixed structures, and guide the leakage flux path through magnetic materials to reduce electromagnetic interference to the outside world. Such solutions can achieve basic shielding functions in conventional scenarios.

[0003] In application, transformers are often mounted on utility poles using mounting brackets, which restricts the operating space. When it is necessary to inspect or maintain the transformer, the fixed shielding structure is prone to scraping against surrounding lines when it is disassembled, making the operation process cumbersome and time-consuming. Utility Model Content

[0004] The purpose of this invention is to provide a transformer leakage magnetic shielding device to solve the technical problem of limited operating space.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a transformer leakage magnetic shielding device, including a mounting frame, on which a transformer is fixedly mounted, and on which a shielding component is provided.

[0006] The shielding assembly includes four shielding plates fixedly connected to the upper end of the mounting frame. The shielding assembly also includes four guide rods that pass through and are slidably connected to the upper end of the mounting frame. The upper ends of the four guide rods are fixedly connected to a shielding chamber. The shielding chamber has a transmission groove corresponding to the guide rod. Two round shafts are slidably connected to the inner walls on both sides of the upper end of the shielding chamber. A return spring is sleeved on the outer wall of the round shaft. One end of the return spring is fixedly connected to a limit block, and the other end of the round shaft is fixedly connected to a gripping plate.

[0007] As a preferred embodiment of this utility model, the shielding plate corresponds to the transmission groove, and the length and width of the shielding plate are 1.1 times the length and width of the transmission groove.

[0008] As a preferred embodiment of this utility model, a heat dissipation gap is provided between the shielding plate and the shielding chamber, with a gap width of 10-20mm.

[0009] As a preferred embodiment of this utility model, the grip plate has a crescent-shaped structure design, and the lower end of the grip plate is hollow.

[0010] As a preferred embodiment of this utility model, the shielding plate and the shielding chamber are a stacked structure of grain-oriented silicon steel sheets with a thickness of 0.3-0.5mm, and the stacking direction is parallel to the direction of the transformer leakage magnetic field.

[0011] Compared with the prior art, the beneficial effects of this utility model transformer leakage magnetic shielding device are as follows: through the adjustable shielding chamber and guide rod structure, the shielding distance can be flexibly adjusted. When the transformer needs to be repaired, the operator can drive the round shaft to slide by holding the plate, and after releasing the limit state of the shielding chamber, the shielding chamber can be quickly lowered along the guide rod to the bottom of the mounting frame, avoiding the occurrence of scratching the line, freeing up sufficient space for maintenance work, and significantly improving the convenience of maintenance. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the shielding structure according to an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the shielding chamber in its sunken state in an embodiment of this utility model;

[0015] Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model;

[0016] Figure 4 This is a schematic diagram of the shielding chamber structure in an embodiment of this utility model;

[0017] Figure 5 This is a schematic diagram of the grip plate in an embodiment of the present invention.

[0018] Reference numerals in the attached diagram: 1. Mounting bracket; 2. Transformer; 3. Shielding plate; 4. Guide rod; 5. Shielding chamber; 6. Transmission groove; 7. Round shaft; 8. Return spring; 9. Limiting block; 10. Grip plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0020] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present 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. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0022] See Figure 1-5 As shown, the transformer leakage magnetic shielding device of this utility model includes a mounting frame 1, on which a transformer 2 is fixedly mounted; a shielding assembly is provided on the upper end of the mounting frame 1; the shielding assembly includes four shielding plates 3 fixedly connected to the upper end of the mounting frame 1, and four guide rods 4 that penetrate and are slidably connected to the upper end of the mounting frame 1. A shielding chamber 5 is fixedly connected to the upper end of the four guide rods 4. A transmission groove 6 is opened in the shielding chamber 5 corresponding to the guide rods 4. Two round shafts 7 are slidably connected to the inner walls on both sides of the upper end of the shielding chamber 5. A return spring 8 is sleeved on the outer wall of the round shaft 7. A limit block 9 is fixedly connected to one end of the return spring 8, and a gripping plate 10 is fixedly connected to the other end of the round shaft 7.

[0023] When transformer 2 needs to be repaired, the operator holds and pulls the grip plate 10 horizontally. The grip plate 10 drives the round shaft 7 and the limiting block 9 to slide. At this time, the return spring 8 is squeezed by the limiting block 9 and undergoes elastic deformation. When the grip plate 10 moves to one side of the shielding plate 3, the shielding chamber 5 slides downward. The shielding chamber 5 slides along the axis of the guide rod 4. When the inner wall of the transmission groove 6 of the shielding chamber 5 is in contact with the mounting frame 1, the shielding chamber 5 sinks to the lower end of the mounting frame 1, leaving a lot of space for maintenance.

[0024] The shielding plate 3 corresponds to the transmission groove 6. The length and width of the shielding plate 3 are 1.1 times the length and width of the transmission groove 6. A heat dissipation gap of 10-20mm is provided between the shielding plate 3 and the shielding chamber 5. The gripping plate 10 has a crescent-shaped structure and the lower end of the gripping plate 10 is hollow. The shielding plate 3 and the shielding chamber 5 are a stacked structure of grain-oriented silicon steel sheets with a thickness of 0.3-0.5mm. The stacking direction is parallel to the leakage magnetic field direction of the transformer 2.

[0025] When in use, as the shielding chamber 5 slides along the guide rod 4, the edge of the transmission groove 6 overlaps with the edge of the shielding plate 3, further reducing the shielding gap and improving the leakage magnetic shielding effect. At the same time, the 10-20mm heat dissipation gap between the shielding plate 3 and the shielding chamber 5 forms a heat dissipation channel, and the heat generated by the operation of the transformer 2 is discharged through the gap, preventing the shielding components from degrading due to heat accumulation. In addition, the semi-circular hollow grip plate 10 is easy for operators to hold. The hollow part reduces the weight of the grip plate 10 while providing space for finger force, making it easier to pull the round shaft 7. The shielding plate 3 and the shielding chamber 5 adopt a 0.3-0.5mm grain-oriented silicon steel sheet stacked structure. The stacking direction is parallel to the direction of the leakage magnetic field of the transformer 2. The easy magnetization direction of the silicon steel sheet is consistent with the direction of the magnetic field, which can significantly reduce the magnetic resistance. The leakage magnetic field preferentially passes through the low magnetic resistance path formed by the silicon steel sheet, rather than diffuses to the outside, thereby effectively suppressing the leakage magnetic field. At the same time, the stacked structure limits the eddy current range through the inter-sheet insulation layer, reducing the heat loss of the shield itself.

[0026] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A transformer leakage magnetic shielding device, including a mounting frame (1), wherein a transformer (2) is fixedly mounted on the upper end of the mounting frame (1); Its features are: The mounting bracket (1) is provided with a shielding component at its upper end; The shielding assembly includes four shielding plates (3) fixedly connected to the upper end of the mounting frame (1). The shielding assembly also includes four guide rods (4) that pass through and are slidably connected to the upper end of the mounting frame (1). The upper ends of the four guide rods (4) are fixedly connected to a shielding chamber (5). The shielding chamber (5) is provided with a transmission groove (6) corresponding to the guide rods (4). Two round shafts (7) are slidably connected to the inner walls on both sides of the upper end of the shielding chamber (5). The outer wall of the round shafts (7) is fitted with a return spring (8). One end of the return spring (8) is fixedly connected to a limit block (9), and the other end of the round shaft (7) is fixedly connected to a gripping plate (10).

2. The transformer leakage flux shielding device according to claim 1, characterized in that: The shielding plate (3) corresponds to the transmission groove (6), and the length and width of the shielding plate (3) are 1.1 times the length and width of the transmission groove (6).

3. The transformer leakage flux shielding device according to claim 1, characterized in that: A heat dissipation gap is provided between the shielding plate (3) and the shielding chamber (5), and the gap width is 10-20mm.

4. The transformer leakage flux shielding device according to claim 1, characterized in that: The grip plate (10) has a crescent-shaped structure design, and the lower end of the grip plate (10) is hollow.

5. The transformer leakage flux shielding device according to claim 1, characterized in that: The shielding plate (3) and the shielding chamber (5) are a stacked structure of grain-oriented silicon steel sheets with a thickness of 0.3-0.5mm, and the stacking direction is parallel to the leakage magnetic field direction of the transformer (2).

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