A shielding structure of a power transformer riser

Abstract

The utility model discloses a kind of power transformer elevated seat shielding structure, including elevated seat, the operating hole is equipped on elevated seat, including operating hole cover plate and shielding plate, the shielding plate is fixedly connected on operating hole cover plate;When installation, the inside of the shielding plate is aligned with the inside of elevated seat wall. Compared with prior art, the utility model has the advantages of reducing production cost, reducing the distance from the sleeve equalizing ball to the operating hole by shielding the operating hole opening, thereby avoiding to enlarge the diameter of the elevated seat.

Description

Technical Field

[0001] This utility model relates to the technical field of oil-immersed transformers, specifically to a shielding structure for a power transformer riser base. Background Technology

[0002] In the manufacturing and operation of oil-immersed transformers, the bushing is fixed inside the riser base by the riser base mounting flange, and an operating hole is opened on the riser base to use bolts to connect the transformer leads to the bushing tail.

[0003] Since the equalizing ball at the tail of the bushing is a charged body, the presence of the operating hole will cause a change in the electric field distribution, making the required safe distance from the equalizing ball to the edge of the operating hole greater than the safe distance from the equalizing ball to the riser wall.

[0004] This design flaw increases the diameter of the riser, thereby increasing the amount of steel plate used and the transformer oil capacity, thus raising manufacturing costs.

[0005] In existing technologies, increasing the diameter of the riser seat is a common way to solve the safety distance problem, but this is not conducive to cost control. As a transformer manufacturer, our company has found in practice that this problem urgently needs optimization. Utility Model Content

[0006] (I) Problems to be solved

[0007] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a power transformer riser shielding structure that reduces production costs by reducing the distance between the bushing equalizing ball and the operating hole through shielding the opening of the operating hole, thereby avoiding the need to increase the diameter of the riser.

[0008] (II) Technical Solution

[0009] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a shielding structure for a power transformer riser base, including a riser base, wherein the riser base is provided with an operation hole, including an operation hole cover plate and a shielding plate, wherein the shielding plate is fixedly connected to the operation hole cover plate;

[0010] During installation, the inner side of the shielding plate is aligned with the inner side of the riser wall.

[0011] As an improvement, the distance between the shielding plate and the edge of the operating hole opening is less than 8mm.

[0012] As an improvement, the thickness of the shielding plate is equal to the thickness of the raised seat wall.

[0013] As an improvement, the shielding plate is welded to the operating hole cover plate by round steel with a diameter of 30mm.

[0014] As an improvement, the upper part of the operating hole cover is provided with a positioning pin to prevent incorrect installation orientation.

[0015] As an improvement, the edges of the shielding plate are polished to form chamfers with a radius of 2mm.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the advantages of this utility model are: it can reduce the required distance from the bushing pressure equalizing ball to the operating hole, effectively reduce the safety distance requirement, eliminate the need to increase the size of the lifting seat, save materials and oil, and has a stable structure, is easy to install, reduces production costs, and is easy to promote and use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-section of the shielding structure of a power transformer riser.

[0019] Figure 2 This is a top view of the connection structure of the shielding structure of a power transformer riser.

[0020] Figure 3 This is a top view of the operating hole cover plate.

[0021] Figure 4 yes Figure 3 A structural schematic diagram of enlarged view of section A in the middle.

[0022] Figure 5 This is a structural view of the main view of the operating hole cover.

[0023] As shown in the figure: 1. Sleeve; 2. Elevator seat; 3. Operating hole; 4. Elevator seat wall; 5. Sleeve equalizing ball; 6. Operating hole cover plate; 7. Shielding plate; 8. Round steel; 9. Positioning pin. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0025] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0029] Please refer to the appendix carefully. Figure 1-5 ,like Figure 1 The diagram shown is a structural schematic diagram of the application.

[0030] In practical applications, a power transformer riser shielding structure includes a riser 2, on which an operation hole 3 is provided.

[0031] It includes an operating hole cover plate 6 and a shielding plate 7, wherein the shielding plate 7 is fixedly connected to the operating hole cover plate 6; when installed, the inner side of the shielding plate 7 is aligned with the inner side of the wall of the lifting seat 2.

[0032] The distance between the shielding plate 7 and the edge of the opening of the operating hole 3 is less than 8mm, and the thickness of the shielding plate 7 is equal to the thickness of the wall of the lifting seat 2.

[0033] The shielding plate 7 is welded to the operating hole cover plate 6 by a round steel bar 8 with a diameter of 30mm. The upper part of the operating hole cover plate 6 is provided with a positioning pin 9 to prevent incorrect installation direction.

[0034] The edges of the shielding plate 7 are polished to form chamfers with a radius of 2mm.

[0035] In a specific implementation of this invention, a shielding device is welded to the operating hole cover plate to shield the opening of the operating hole. The operating hole shielding plate is 8mm away from the edge of the operating hole opening, and its thickness is equal to the thickness of the lifting seat wall. The inner side of the operating hole shielding plate is aligned with the lifting seat wall. The operating hole shielding plate passes through... The round steel is welded to the operating hole cover plate. A positioning pin is added to the upper part of the cover plate to prevent incorrect installation direction. During installation, a shielding plate with the same thickness as the riser wall is cut according to the diagram and shaped. The edges are rounded. The shielding plate is welded to the cover plate by the round steel and the positioning pin is welded. The shielding structure is installed on the operating hole, ensuring that the inner side of the shielding plate is aligned with the riser wall. The distance between the edge of the shielding plate and the opening of the operating hole should be ≤8mm.

[0036] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0037] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0038] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A shielding structure for a power transformer riser base, comprising a riser base (2), wherein the riser base (2) is provided with an operating hole (3), characterized in that: It includes an operating hole cover plate (6) and a shielding plate (7), wherein the shielding plate (7) is fixedly connected to the operating hole cover plate (6); During installation, the inner side of the shielding plate (7) is aligned with the inner side of the wall of the riser (2).

2. The power transformer riser shielding structure according to claim 1, characterized in that: The distance between the shielding plate (7) and the edge of the opening of the operating hole (3) is less than 8 mm.

3. The power transformer riser shielding structure according to claim 1, characterized in that: The thickness of the shielding plate (7) is equal to the thickness of the wall of the lifting seat (2).

4. The shielding structure for a power transformer riser according to claim 1, characterized in that: The shielding plate (7) is welded to the operating hole cover plate (6) by a round steel bar (8) with a diameter of 30 mm.

5. The power transformer riser shielding structure according to claim 1, characterized in that: The upper part of the operating hole cover plate (6) is provided with a positioning pin (9) to prevent incorrect installation direction.

6. The shielding structure for a power transformer riser according to claim 1, characterized in that: The edge of the shielding plate (7) is polished to form a chamfer with a radius of 2mm.

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