Oil discharge structure of transformer oil tank

Abstract

The utility model relates to an oil discharge structure of a transformer oil tank, which comprises a first connecting pipe and a second connecting pipe which are respectively positioned on the inner side and the outer side of the side wall of the oil tank and are opposite to each other, and the opposite ends of the first connecting pipe and the second connecting pipe are respectively and fixedly connected with a first flange plate and a second flange plate; the first flange plate and the second flange plate are fixedly connected with the side wall of the oil tank through bolts, oil discharge holes communicated with inner cavities of the first connecting pipe and the second connecting pipe are formed in the side wall of the oil tank, and the other end of the first connecting pipe is detachably connected with a 90-degree elbow. The end, away from the first connecting pipe, of the 90-degree elbow faces the bottom of the oil tank and is detachably connected with an adjusting pipe, the adjusting pipe vertically extends, and the distance between the lower end of the adjusting pipe and the bottom of the oil tank is 1-10 mm. The transformer oil tank is free of a welding structure during installation, is more convenient to disassemble, assemble and adjust, avoids the problem of welding slag residue, can prevent transformer oil from being sprayed out of the oil tank, and improves the working efficiency.

Description

Technical Field

[0001] The utility model relates to the field of transformers, and specifically refers to an oil drainage structure for a transformer oil tank. Background Technique

[0002] With the rapid development of the transformer industry, the capacity and volume of transformers are getting larger and larger. In order to control the transportation weight of transformers, nitrogen filling transportation is adopted, and the transformer oil needs to be drained and transported separately. Most existing transformer oil tanks use straight pipe joints to connect with oil pipelines, and the bottom transformer oil cannot be completely drained during oil drainage.

[0003] Patent No. CN112489953A discloses a transformer oil injection and drainage structure, including an oil drainage elbow. One end of the oil drainage elbow extending into the transformer oil tank is bent towards the bottom of the transformer oil tank, and the siphon phenomenon can be used to drain all the oil. However, since the oil drainage elbow and the transformer oil tank of this patent are fixedly welded, it is very difficult to disassemble, install and adjust the oil drainage elbow, and there will still be problems with welding slag residues when using the welding method. And one end of the oil drainage elbow located outside the transformer oil tank is perpendicular to the wall of the transformer oil tank. In this structure, when draining oil, the oil will spray horizontally, often spraying out of the oil pool, which is extremely likely to cause environmental pollution around and is inconvenient to use. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an oil drainage structure for a transformer oil tank, which has no welding structure during installation, is more convenient for disassembly, installation and adjustment, avoids the problem of welding slag residues, and can prevent transformer oil from spraying out of the oil pool, improving work efficiency.

[0005] The utility model is realized through the following technical solutions. An oil drainage structure for a transformer oil tank includes a first connecting pipe and a second connecting pipe respectively located inside and outside the side wall of the oil tank. The first connecting pipe and the second connecting pipe are opposite to each other, and first flange plates and second flange plates are fixedly connected to the opposite ends respectively. The first flange plates and the second flange plates are both connected and fixed to the side wall of the oil tank through bolts. An oil drainage hole communicating with the inner cavities of the first connecting pipe and the second connecting pipe is opened on the side wall of the oil tank. The other end of the first connecting pipe is detachably connected with a 90° elbow. One end of the 90° elbow away from the first connecting pipe faces the bottom of the oil tank and is detachably connected with an adjusting pipe. The adjusting pipe extends vertically, and the distance between the lower end of the adjusting pipe and the bottom of the oil tank is 1 - 10 mm.

[0006] In this solution, the first connecting pipe and the second connecting pipe are bolted and fixed to the side wall of the oil tank through the first flange plates and the second flange plates, which is convenient for disassembly and installation. And welding operation is not required during installation, thus avoiding welding slag residues and making the inside of the oil tank cleaner. Moreover, the 90° elbow and the first connecting pipe are detachably connected, further improving the convenience of disassembly and installation. The 90° elbow and the adjusting pipe are detachable, so that it is convenient to replace adjusting pipes of different lengths, thereby realizing the adjustment of different distances and making the use and replacement more convenient.

[0007] As an optimization, both ends of the 90° elbow are threadedly connected to the first connecting pipe and the adjusting pipe respectively. This optimization realizes detachable connection through threaded connection. Threads are easy to machine and have low cost.

[0008] As an optimization, sealing gaskets are provided between the first flange, the second flange and the side wall of the fuel tank. This optimization improves the sealing performance between the flange and the side wall of the fuel tank through the sealing gasket, preventing oil leakage.

[0009] As an optimization, the outer gaps between the first flange, the second flange and the side wall of the fuel tank are sealed with sealant. This optimization seals the outer gaps with sealant, thereby further improving the sealing performance between the flange and the side wall of the fuel tank.

[0010] As an optimization, a ball valve is detachably connected to the other end of the second connecting pipe. This optimization facilitates the control of the oil discharge from the fuel tank through the ball valve.

[0011] As an optimization, a 45° elbow is detachably connected to the end of the ball valve away from the second connecting pipe, and the end of the 45° elbow away from the ball valve is bent downward. This optimization prevents the transformer oil from being sprayed horizontally out of the oil pool through the 45° elbow, avoiding pollution to the surrounding environment. At the same time, the 45° angle is also convenient for personnel to operate.

[0012] As an optimization, a third flange is fixedly connected to the other end of the second connecting pipe, a fourth flange is fixedly connected to the end of the 45° elbow, and fifth flanges are fixedly connected to both ends of the ball valve. The two fifth flanges are respectively connected and fixed to the third flange and the fourth flange by bolts. This optimization makes disassembly more convenient through flange bolt connection.

[0013] As an optimization, sealing gaskets are provided between the third flange and the fifth flange, and between the fourth flange and the fifth flange. This optimization improves the sealing performance between the flanges.

[0014] As an optimization, the sealing gasket is a corrugated metal gasket. This optimization has stronger sealing performance for the corrugated metal gasket, and the metal gasket has better corrosion resistance and high temperature resistance effects, which is more suitable for sealing oil-based media.

[0015] The beneficial effects of the present utility model are as follows: The first connecting pipe and the second connecting pipe are fixedly connected to the side wall of the fuel tank by bolts through the first flange and the second flange, which is convenient for disassembly and installation, and welding operation is not required during installation, thus avoiding the residue of welding slag and making the inside of the fuel tank cleaner. Moreover, the 90° elbow is detachably connected to the first connecting pipe, further improving the convenience of disassembly and installation. The 90° elbow and the adjusting pipe are detachable, so as to facilitate the replacement of adjusting pipes with different lengths, thereby realizing the adjustment of different spacings and making the use more convenient. The second connecting pipe is convenient for controlling the oil discharge of the fuel tank through a ball valve, and then the 45° elbow is used to prevent the transformer oil from spraying horizontally out of the oil pool, avoiding pollution to the surrounding environment. At the same time, the 45° angle is also convenient for personnel to operate, and the use effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the schematic exploded view of the present utility model;

[0017] Figure 2 is the schematic structural view of the present utility model;

[0018] Figure 3 is Figure 2 the sectional view of part A of

[0019] As shown in the figure:

[0020] 1. Side wall of the fuel tank, 2. First connecting pipe, 3. Second connecting pipe, 4. First flange, 5. Second flange, 6. 90° elbow, 7. Adjusting pipe, 8. Ball valve, 9. 45° elbow, 10. Third flange, 11. Fifth flange, 12. Fourth flange, 13. Sealing gasket, 14. Sealing glue, 15. Oil discharge hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to clearly illustrate the technical features of this solution, the following is an elaboration of this solution through specific embodiments.

[0022] As Figures 1 to 3 shown, a transformer fuel tank oil discharge structure includes a first connecting pipe 2 and a second connecting pipe 3 respectively located inside and outside the side wall 1 of the fuel tank. In this embodiment, both the first connecting pipe 2 and the second connecting pipe 3 extend horizontally. The opposite ends of the first connecting pipe 2 and the second connecting pipe 3 are respectively fixedly connected with a first flange 4 and a second flange 5. The first flange 4 and the second flange 5 are both fixedly connected to the side wall 1 of the fuel tank by bolts. An oil discharge hole 15 communicating with the inner cavities of the first connecting pipe 2 and the second connecting pipe 3 is opened on the side wall 1 of the fuel tank.

[0023] To improve the sealing performance between the first flange, the second flange and the side wall of the fuel tank, sealing gaskets 13 are provided between the first flange 4, the second flange 5 and the side wall 1 of the fuel tank. The sealing gaskets 13 are corrugated metal gaskets. Moreover, the outer gaps between the first flange 4, the second flange 5 and the side wall 1 of the fuel tank are sealed with a sealant 14. The sealant 14 is an oil-resistant silicone sealant. By using the sealant to seal the outer gaps between the first flange, the second flange and the side wall of the fuel tank, oil leakage can be further prevented.

[0024] The other end of the first connecting pipe 2 is detachably connected to a 90° elbow 6. One end of the 90° elbow 6 away from the first connecting pipe 2 faces the bottom of the fuel tank and is detachably connected to an adjusting pipe 7. The adjusting pipe 7 extends vertically, and the distance between the lower end of the adjusting pipe 7 and the bottom of the fuel tank is 1 - 10 mm.

[0025] Specifically, both ends of the 90° elbow 6 are threadedly connected to the first connecting pipe 2 and the adjusting pipe 7 respectively. In this embodiment, the 90° elbow 6 is an external-thread elbow, and the ends of the first connecting pipe and the adjusting pipe are provided with internal threads adapted to the external threads.

[0026] The other end of the second connecting pipe 3 is detachably connected to a ball valve 8. One end of the ball valve 8 away from the second connecting pipe 3 is detachably connected to a 45° elbow 9, and one end of the 45° elbow 9 away from the ball valve 8 is bent downward.

[0027] Specifically, a third flange 10 is fixedly connected to the other end of the second connecting pipe 3, a fourth flange 12 is fixedly connected to the end of the 45° elbow 9, and fifth flanges 11 are fixedly connected to both ends of the ball valve 8. The two fifth flanges 11 are respectively connected and fixed to the third flange 10 and the fourth flange 12 by bolts. Moreover, sealing gaskets 13 are provided between the third flange 10 and the fifth flange 11, and between the fourth flange 12 and the fifth flange 11, so as to ensure the sealing performance between the flanges. In this embodiment, the sealing gaskets 13 between the third flange and the fifth flange, and between the fourth flange and the fifth flange are also corrugated metal gaskets, with stronger sealing performance, better corrosion resistance and high-temperature resistance effects, and are more suitable for sealing oil media.

[0028] Working principle: During installation, first, the first connecting pipe 2 and the second connecting pipe 3 are fixedly connected to the side wall 1 of the fuel tank by bolts through the first flange 4 and the second flange 5. Then, the 90° elbow 6 is fixedly connected to the first connecting pipe 2 by threading. Next, the adjusting pipe 7 is fixedly connected to the 90° elbow 6 by threading, and the installation inside the fuel tank is completed. On the outside of the fuel tank, the fifth flange 11 at one end of the ball valve 8 is fixedly connected to the third flange 10 of the second connecting pipe 3 by bolts, and the fifth flange 11 at the other end of the ball valve 8 is fixedly connected to the fourth flange 12 of the 45° elbow 9 by bolts. Finally, a sealing glue 14 is applied in a circumferential direction to the outer gap between the first flange 4, the second flange 5 and the side wall 1 of the fuel tank, and the overall installation is completed.

[0029] Of course, the above description is not limited to the above examples. The technical features not described in the present utility model can be realized by or adopted from the prior art, and will not be elaborated here. The above embodiments and the accompanying drawings are only used to illustrate the technical solutions of the present utility model and are not intended to limit the present utility model. The present utility model has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the technical field within the substantial scope of the present utility model do not depart from the purpose of the present utility model and should also fall within the scope of protection of the claims of the present utility model.

Claims

1. An oil-draining structure for a transformer oil tank, characterized in that: It includes a first connecting pipe (2) and a second connecting pipe (3) respectively located on the inner and outer sides of the side wall (1) of the fuel tank. The first connecting pipe and the second connecting pipe are opposite to each other, and a first flange (4) and a second flange (5) are fixedly connected to the opposite ends respectively. The first flange and the second flange are both fixedly connected to the side wall (1) of the fuel tank by bolts. An oil discharge hole (15) communicating with the inner cavities of the first connecting pipe (2) and the second connecting pipe (3) is opened on the side wall (1) of the fuel tank. The other end of the first connecting pipe (2) is detachably connected to a 90° elbow (6). The end of the 90° elbow away from the first connecting pipe faces the bottom of the fuel tank and is detachably connected to an adjusting pipe (7). The adjusting pipe extends vertically, and the distance between the lower end of the adjusting pipe and the bottom of the fuel tank is 1 - 10 mm.

2. The oil discharge structure of a transformer oil tank according to claim 1, wherein: Both ends of the 90° elbow (6) are threadedly connected to the first connecting pipe (2) and the adjusting pipe (7) respectively.

3. The oil drainage structure of a transformer oil tank according to claim 1, characterized in that: Sealing gaskets (13) are provided between the first flange (4), the second flange (5) and the side wall (1) of the fuel tank.

4. The oil drainage structure of a transformer oil tank according to claim 3, characterized in that: The outer gaps between the first flange (4), the second flange (5) and the side wall (1) of the fuel tank are all sealed with sealant (14).

5. A transformer oil tank oil discharge structure according to claim 3, characterized in that: The other end of the second connecting pipe (3) is detachably connected to a ball valve (8).

6. The oil draining structure of a transformer oil tank according to claim 5, wherein: The end of the ball valve (8) away from the second connecting pipe (3) is detachably connected to a 45° elbow (9), and the end of the 45° elbow away from the ball valve (8) is bent downward.

7. The oil drainage structure of a transformer oil tank according to claim 6, characterized in that: A third flange (10) is fixedly connected to the other end of the second connecting pipe (3), a fourth flange (12) is fixedly connected to the end of the 45° elbow (9), and fifth flanges (11) are fixedly connected to both ends of the ball valve (8). The two fifth flanges are respectively fixedly connected to the third flange and the fourth flange by bolts.

8. A transformer oil tank oil drainage structure according to claim 7, characterized in that: Sealing gaskets (13) are provided between the third flange (10) and the fifth flange (11), and between the fourth flange (12) and the fifth flange (11).

9. The oil drainage structure of a transformer oil tank according to claim 8, wherein: The sealing gasket (13) is a corrugated metal gasket.

Images