Structure for preventing oil leakage of upper edge of transformer oil tank

Abstract

The utility model discloses a structure for preventing oil leakage of the upper edge of a transformer oil tank. The structure comprises an upper tank cover and an oil tank main body, the upper tank cover is arranged at an upper opening of the oil tank body, a steel ring is arranged below a main body of the upper tank cover, a steel ring fixing groove is formed in the periphery of the steel ring, and a steel ring rubber ring is arranged in the steel ring fixing groove; a check ring is arranged on the inner wall of an upper opening of the fuel tank body, a tank fixing groove is formed in the junction of the check ring and the inner wall of the fuel tank body, and a fuel tank rubber ring is arranged in the tank fixing groove. The steel ring rubber ring is in wedge-shaped fit with the oil tank rubber ring; a fixing plate extends from the periphery of an opening of the oil tank body, round steel is arranged on the fixing plate in a surrounding mode, an outer ring fixing groove is formed in the portion, between the round steel and the opening of the oil tank body, of the fixing plate, and an outer ring rubber ring is arranged in the outer ring fixing groove. According to the utility model, the sealing performance can be effectively improved through wedge-shaped matching, and meanwhile, the outer ring rubber ring is arranged outside, so that the outer ring rubber ring can be extruded during installation and can be more tightly attached between the upper box cover and the fixed plate, and the sealing performance is higher.

Description

Technical Field

[0001] This utility model relates to the field of transformer manufacturing, and in particular to a structure for preventing oil leakage along the upper edge of a transformer tank. Background Technology

[0002] As a critical component of power equipment, the sealing performance of transformer oil tanks is of paramount importance, directly affecting the safe and stable operation of the equipment. However, the existing sealing structure, which uses a single round steel bar paired with a rubber strip, has significant limitations. During use, transformer oil tanks are susceptible to deformation due to temperature changes, internal pressure fluctuations, and various external environmental factors. This deformation can negatively impact the sealing fit between the single round steel bar and the rubber strip. Once the sealing performance is compromised, problems such as oil leakage and seepage may occur in the transformer oil tank. Utility Model Content

[0003] The purpose of this invention is to provide a structure with high sealing performance to prevent oil leakage along the upper edge of a transformer tank.

[0004] The purpose of this utility model is achieved as follows: a structure for preventing oil leakage along the upper edge of a transformer tank, comprising an upper tank cover and a tank body; the upper tank cover is positioned at the opening above the tank body, a steel ring is provided below the main body of the upper tank cover, the steel ring is integrally connected to the upper tank cover, a steel ring fixing groove is provided around the steel ring, and a steel ring rubber ring is provided inside the steel ring fixing groove; a retaining ring is provided on the inner wall of the opening above the tank body, a tank body fixing groove is provided at the junction of the retaining ring and the inner wall of the tank body, and a tank rubber ring is provided inside the tank body fixing groove; the cross-section of the tank rubber ring is a right trapezoidal shape with a smaller top and a larger bottom, and the cross-section of the steel ring rubber ring is a right trapezoidal shape with a larger top and a smaller bottom; the steel ring rubber ring and the tank rubber ring are wedge-shaped fits;

[0005] A fixing plate extends around the opening of the main body of the fuel tank. A round steel bar is arranged around the fixing plate. An outer ring fixing groove is provided on the fixing plate between the round steel bar and the opening of the main body of the fuel tank. An outer ring rubber ring is provided in the outer ring fixing groove.

[0006] Preferably, the fixing plate is lower than the upper plane of the opening of the fuel tank body to form a misalignment gap, the diameter of the round steel is larger than the misalignment gap, and an installation gap is left between the opening of the fuel tank body and the upper tank cover.

[0007] Preferably, the outer ring rubber ring is composed of an embedded part and an extrusion part, the embedded part is placed in the outer ring fixing groove, and the extrusion part is placed in the installation gap.

[0008] Preferably, both the inner diameter surface of the steel ring rubber ring and the inner diameter surface of the fuel tank rubber ring are provided with limiting protrusions, which are embedded in limiting grooves.

[0009] Preferably, the upper cover and the fixing plate are fixedly connected by bolts, and the bolts are placed in the area between the round steel and the outer ring fixing groove.

[0010] Preferably, after the upper tank cover is connected to the main body of the oil tank, the steel ring does not abut against the retaining ring.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] 1. The steel ring and rubber ring have a cross-section that is larger at the top and smaller at the bottom, while the fuel tank rubber ring has a cross-section that is smaller at the top and larger at the bottom. This wedge-shaped fit allows the two to form a more stable sealing structure when they are in close contact, effectively offsetting the risk of oil leakage caused by pressure fluctuations. An outer ring rubber ring is set in the outer ring fixing groove. The outer ring rubber ring consists of an embedded part and a compression part. The embedded part is placed in the outer ring fixing groove, and the compression part is placed in the installation gap. This allows the rubber ring to be compressed during installation, thus fitting more tightly in the fixing groove and the installation gap, forming multiple seals.

[0013] 2. Limiting protrusions are provided on the inner diameter surfaces of both the steel ring and the rubber ring, and the oil tank rubber ring. The limiting protrusions can be embedded in the limiting groove, thereby limiting the displacement of the rubber ring during the sealing process and ensuring the stability of the sealing structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle.

[0016] Figure 3 This is a schematic diagram of the structure of the upper tank cover and the main body of the fuel tank after they are assembled.

[0017] The components include: 1. Upper tank cover; 2. Tank body; 201. Retaining ring; 202. Tank body fixing groove; 3. Steel ring; 301. Steel ring fixing groove; 4. Steel ring rubber ring; 5. Tank rubber ring; 6. Fixing plate; 601. Outer ring fixing groove; 7. Round steel; 8. Outer ring rubber ring; 801. Embedded part; 802. Extruded part; 9. Misalignment gap; 10. Installation gap; 11. Limiting protrusion. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component 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. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0021] like Figure 1-3 As shown, a structure for preventing oil leakage along the upper edge of a transformer tank includes an upper tank cover 1 and a tank body 2. The upper tank cover 1 is positioned at the opening above the tank body 2. A steel ring 3 is provided below the main body of the upper tank cover 1, and the steel ring 3 is integrally connected to the upper tank cover 1. A steel ring fixing groove 301 is provided around the steel ring 3, and a steel ring rubber ring 4 is provided inside the steel ring fixing groove 301. A retaining ring 201 is provided on the inner wall of the opening above the tank body 2. A tank fixing groove 202 is provided at the junction of the retaining ring 201 and the inner wall of the tank body 2, and a tank rubber ring 5 is provided inside the tank fixing groove 202. The cross-section of the tank rubber ring 5 is a right trapezoid with a smaller top and a larger bottom, and the cross-section of the steel ring rubber ring 4 is a right trapezoid with a larger top and a smaller bottom. The steel ring rubber ring 4 and the tank rubber ring 5 are wedge-shaped.

[0022] A fixing plate 6 extends around the opening of the fuel tank body 2. A round steel bar 7 is arranged around the fixing plate 6. An outer ring fixing groove 601 is provided on the fixing plate 6 between the round steel bar 7 and the opening of the fuel tank body 2. An outer ring rubber ring 8 is provided inside the outer ring fixing groove 601.

[0023] like Figure 2-3As shown, the fixing plate 6 is lower than the upper plane of the opening of the tank body 2 to form a misalignment gap 9. The diameter of the round steel 7 is larger than the misalignment gap 9. An installation gap 10 is left between the opening of the tank body 2 and the upper tank cover 1. The misalignment gap and the installation gap provide sufficient space for the subsequent installation and compression of the outer ring rubber ring.

[0024] like Figure 3 As shown, the outer ring rubber ring 8 is composed of an embedded part 801 and a compression part 802. The embedded part 801 is placed in the outer ring fixing groove 601, and the compression part 802 is placed in the installation gap 10. The embedded part is placed in the outer ring fixing groove, which provides stable support and positioning. The compression part is placed in the installation gap, and after being compressed, it fits more tightly between the oil tank body and the upper tank cover, which enhances the sealing effect.

[0025] like Figure 3 As shown, both the inner diameter surface of the steel ring rubber ring 4 and the inner diameter surface of the oil tank rubber ring 5 are provided with limiting protrusions 11. The limiting protrusions 11 are embedded in the limiting grooves, which restricts the displacement of the rubber rings during the sealing process and ensures the stability of the sealing structure.

[0026] like Figure 2-3 As shown, the upper cover 1 and the fixing plate 6 are fixedly connected by bolts. The bolts are placed in the area between the round steel and the outer ring fixing groove, so that the bolt body is placed inside the structure and not exposed to the outside, thus extending the service life of the bolts.

[0027] like Figure 1-3 As shown, after the upper cover 1 is connected to the oil tank body 2, the steel ring 3 does not abut against the retaining ring 201; this avoids direct contact between the steel ring and the retaining ring, prevents contact damage, and improves docking efficiency.

[0028] The working principle of this utility model is explained as follows: The upper tank cover is connected to the fuel tank body via a steel ring. A steel ring rubber ring is provided around the steel ring, and a fuel tank rubber ring is provided on the inner wall of the fuel tank body opening. The two form a wedge-shaped fit to ensure initial sealing. An outer ring rubber ring is embedded in the outer ring fixing groove on the fixing plate. Its embedded part provides stable support, and the compression part is compressed within the installation gap to tightly fit the fuel tank body and the upper tank cover, further enhancing the seal. The limiting protrusions on the inner sides of the steel ring rubber ring and the fuel tank rubber ring are embedded in the limiting groove to limit the displacement of the rubber ring and ensure the stability of the sealing structure. The upper tank cover is fixed to the fixing plate with bolts. The bolts are placed inside the structure to avoid external exposure and extend service life. The overall structural design is reasonable, and all components fit tightly together, effectively preventing oil leakage along the upper edge of the fuel tank.

[0029] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A structure for preventing oil leakage along the upper edge of a transformer tank, characterized in that, The system includes an upper tank cover and a fuel tank body. The upper tank cover is positioned at the opening above the fuel tank body. A steel ring is provided below the main body of the upper tank cover, and the steel ring is integrally connected to the upper tank cover. A steel ring fixing groove is provided around the steel ring, and a steel ring rubber ring is provided inside the steel ring fixing groove. A retaining ring is provided on the inner wall of the opening above the fuel tank body, and a tank body fixing groove is provided at the junction of the retaining ring and the inner wall of the fuel tank body. A fuel tank rubber ring is provided inside the tank body fixing groove. The cross-section of the fuel tank rubber ring is a right trapezoid with a smaller top and a larger bottom, and the cross-section of the steel ring rubber ring is a right trapezoid with a larger top and a smaller bottom; the steel ring rubber ring and the fuel tank rubber ring are wedge-shaped fits. A fixing plate extends around the opening of the main body of the fuel tank. A round steel bar is arranged around the fixing plate. An outer ring fixing groove is provided on the fixing plate between the round steel bar and the opening of the main body of the fuel tank. An outer ring rubber ring is provided in the outer ring fixing groove.

2. The structure for preventing oil seepage on the upper edge of a transformer tank according to claim 1, characterized in that, The fixing plate is lower than the upper plane of the opening of the main body of the oil tank to form a misalignment gap, the diameter of the round steel is larger than the misalignment gap, and an installation gap is left between the opening of the main body of the oil tank and the upper tank cover.

3. The structure for preventing oil seepage on the upper edge of a transformer tank according to claim 1, characterized in that, The outer ring rubber ring is composed of an embedded part and an extrusion part. The embedded part is placed in the outer ring fixing groove, and the extrusion part is placed in the installation gap.

4. The structure for preventing oil seepage on the upper edge of a transformer tank according to claim 1, characterized in that, The inner diameter surfaces of the steel ring rubber ring and the oil tank rubber ring are both provided with limiting protrusions, which are embedded in the limiting grooves.

5. The structure for preventing oil seepage on the upper edge of a transformer tank according to claim 1, wherein The upper cover and the fixing plate are fixedly connected by bolts, and the bolts are placed in the area between the round steel and the outer ring fixing groove.

6. The structure for preventing oil seepage on the upper edge of a transformer tank according to claim 1, wherein After the upper tank cover is connected to the main body of the oil tank, the steel ring does not collide with the retaining ring.

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