Fixing structure for oil tank of oil-immersed power transformer

Abstract

The utility model discloses a fixing structure for an oil tank of an oil-immersed power transformer, and relates to the technical field of oil-immersed transformers. The oil-immersed transformer comprises an oil-immersed transformer body and an auxiliary oil tank, wherein the auxiliary oil tank is communicated with an oil tank in the oil-immersed transformer body through a pipeline; the auxiliary oil tank is placed on the two supporting plates, the four cambered surface limiting rings are driven to horizontally move towards the auxiliary oil tank, and the four cambered surface limiting rings limit and fix the two ends of the auxiliary oil tank, so that fixed installation of the auxiliary oil tank is conveniently achieved, meanwhile, an operator can conveniently disassemble the auxiliary oil tank, and the working efficiency is improved. The stirring blades are driven to rotate and stir the insulating oil in the auxiliary oil tank, so that the insulating oil entering the auxiliary oil tank in different time periods is fully mixed, the temperature of the insulating oil in the auxiliary oil tank is kept consistent, and the temperature of the insulating oil in the auxiliary oil tank is kept uniform; therefore, the pressure relief speed of the insulating oil is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-immersed transformers, in particular to a fixing structure for an oil tank of an oil-immersed power transformer. Background Art

[0002] Oil-immersed transformers are one of the important equipment in the power supply and distribution systems of industrial and mining enterprises and civil buildings. They reduce the 10 (6) kV or 35 kV network voltage to the 230 / 400V bus voltage used by users. This type of product is suitable for AC 50 (60) Hz, with a maximum three-phase rated capacity of 2500 kVA, and can be used indoors (outdoors);

[0003] However, the oil-immersed power transformer tank in the prior art still has some defects:

[0004] 1. The oil tank of an oil-immersed power transformer usually needs to be used with an auxiliary oil tank. However, the auxiliary oil tank is mostly fixed on the top of the oil-immersed transformer by bolts. If the auxiliary oil tank needs to be maintained or replaced, the installation and removal process of the auxiliary oil tank is relatively cumbersome, which makes the maintenance or replacement of the auxiliary oil tank relatively inconvenient;

[0005] 2. The auxiliary oil tank of the oil-immersed transformer is used to relieve the pressure of the insulating oil in the transformer tank. Since the insulating oil in the transformer tank enters the auxiliary oil tank at different times, the temperature of the insulating oil in the auxiliary oil tank is inconsistent. The temperature of the insulating oil at the bottom of the auxiliary oil tank is higher. During the pressure relief process, the insulating oil with a higher temperature at the bottom has a slow pressure relief speed. Utility Model Content

[0006] In order to solve the problems of inconvenient maintenance and replacement of the auxiliary oil tank of the oil-immersed transformer and slow pressure relief of the insulating oil in the auxiliary oil tank; the purpose of the utility model is to provide a fixing structure for the oil tank of the oil-immersed power transformer.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a fixing structure for an oil tank of an oil-immersed power transformer, comprising an oil-immersed transformer body and an auxiliary oil tank, the auxiliary oil tank being connected to the oil tank in the oil-immersed transformer body through a pipeline, two support frames being fixedly mounted on the upper end surface of the oil-immersed transformer body, one end of the two support frames being provided with a fixing mechanism for fixing the auxiliary oil tank, and a stirring mechanism being provided in the auxiliary oil tank;

[0008] The fixing mechanism includes two L-shaped fixing frames, one end of which is fixedly installed on one end of a supporting frame, one side of the two L-shaped fixing frames is provided with a movable plate, both ends of the two movable plates are fixedly installed with U-shaped frames, one end of two adjacent U-shaped frames is fixedly installed with an arc-surface limiting ring, and threaded rods are threadedly installed on the two L-shaped fixing frames, and one end of one of the threaded rods is rotatably connected to one side of a movable plate.

[0009] Preferably, two guide telescopic rods are fixedly mounted on one side of the two L-shaped fixing frames, wherein the piston ends of two adjacent guide telescopic rods are fixedly connected to one side of a movable plate.

[0010] Preferably, the stirring mechanism comprises a stirring shaft, the stirring shaft passes through the auxiliary oil tank and is rotatably connected to the axis of the auxiliary oil tank, a fixed roller is fixedly mounted on the stirring shaft, and a plurality of evenly distributed stirring blades are fixedly mounted on the fixed roller.

[0011] Preferably, a motor is fixedly provided at one end of the auxiliary oil tank, a rotating rod is fixedly installed at the driving output end of the motor, the rotating rod and the auxiliary oil tank are rotatably connected, one end of the rotating rod and one end of the stirring shaft are fixedly installed with bevel gears, and the two bevel gears are meshed with each other.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, by placing the auxiliary fuel tank on two supporting plates and driving four arc-surface limit rings to move horizontally toward the auxiliary fuel tank, the four arc-surface limit rings limit and fix the two ends of the auxiliary fuel tank, thereby conveniently realizing the fixed installation of the auxiliary fuel tank and facilitating the operators to disassemble the auxiliary fuel tank, thereby effectively improving the convenience of installation and disassembly of the auxiliary fuel tank, and at the same time improving the convenience of maintenance and replacement of the auxiliary fuel tank;

[0014] 2. In the utility model, the stirring blade is driven to rotate, and the stirring blade stirs the insulating oil in the auxiliary oil tank, so that the insulating oil entering the auxiliary oil tank at different time periods is fully mixed, so that the temperature of the insulating oil in the auxiliary oil tank is kept consistent, thereby improving the speed of insulating oil pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1The utility model is a schematic diagram of the overall structure of a fixing structure for an oil tank of an oil-immersed power transformer.

[0017] Figure 2 It is a schematic diagram of the connection structure between the auxiliary oil tank, the fixing mechanism and the support plate of the utility model.

[0018] Figure 3 It is a schematic diagram of the separation of the auxiliary oil tank, the support plate and the arc-surface limit ring of the utility model.

[0019] Figure 4 It is a schematic diagram of the cross section of the auxiliary oil tank and the connection structure of the stirring mechanism of the utility model.

[0020] In the figure: 1. Oil-immersed transformer body; 11. Support frame; 12. Support plate; 13. Anti-skid pad; 14. Auxiliary oil tank; 2. Fixing mechanism; 21. L-shaped fixing frame; 22. Moving plate; 23. U-shaped frame; 24. Arc limit ring; 25. Protective pad; 26. Guide telescopic rod; 27. Threaded rod; 28. Spherical handle; 3. Stirring mechanism; 31. Stirring shaft; 32. Fixed roller; 33. Stirring blade; 34. Motor; 35. L-shaped fixing block; 36. Rotating rod; 37. Bevel gear. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example: Figure 1-4As shown, the utility model provides a fixing structure for an oil tank of an oil-immersed power transformer, comprising an oil-immersed transformer body 1 and an auxiliary oil tank 14, wherein the auxiliary oil tank 14 is connected to the oil tank in the oil-immersed transformer body 1 through a pipeline, and two support frames 11 are fixedly installed on the upper end surface of the oil-immersed transformer body 1, and one end of the two support frames 11 is provided with a fixing mechanism 2 for fixing the auxiliary oil tank 14, and a stirring mechanism 3 is provided in the auxiliary oil tank 14. By setting the fixing mechanism 2, the fixing mechanism 2 can facilitate the installation of the auxiliary oil tank 14 by the operator (the auxiliary oil tank 14 can be easily installed by the operator). The auxiliary oil tank 14 is connected to the pipeline of the oil-immersed transformer body 1 by a flange), and is convenient for disassembly, thereby improving the convenience of installation and disassembly of the auxiliary oil tank 14. By setting the stirring mechanism 3, when the insulating oil in the oil-immersed transformer body 1 enters the auxiliary oil tank 14 through the pipeline, the insulating oil is depressurized in the auxiliary oil tank 14, and the stirring mechanism 3 can stir the insulating oil in the auxiliary oil tank 14, so that the insulating oil entering the auxiliary oil tank 14 at different time periods is fully mixed, so that the temperature of the insulating oil in the auxiliary oil tank 14 is kept consistent, thereby improving the speed of depressurization of the insulating oil;

[0023] The fixing mechanism 2 includes two L-shaped fixing frames 21, one end of which is fixedly mounted on one end of a supporting frame 11, one side of each of the two L-shaped fixing frames 21 is provided with a movable plate 22, both ends of the two movable plates 22 are fixedly mounted with a U-shaped frame 23, one end of each of the two adjacent U-shaped frames 23 is fixedly mounted with an arc-surface limiting ring 24, and threaded rods 27 are threadedly mounted on the two L-shaped fixing frames 21, one end of each of the threaded rods 27 is rotatably connected to one side of a movable plate 22.

[0024] A support plate 12 is fixedly installed at one end of the two support frames 11, and anti-skid pads 13 are fixedly installed on the inner walls of the two support plates 12. The outer wall of the auxiliary fuel tank 14 is in movable contact with the two anti-skid pads 13. By setting the support plate 12 and the anti-skid pad 13, the support plate 12 can support the auxiliary fuel tank 14 through the anti-skid pad 13, thereby improving the stability of the auxiliary fuel tank 14.

[0025] A protective pad 25 is fixedly installed on the inner wall of the arc-surface limit ring 24, and the end of the auxiliary fuel tank 14 is in movable contact with the protective pad 25. By setting the arc-surface limit ring 24 and the protective pad 25, the arc-surface limit ring 24 can limit the two ends of the auxiliary fuel tank 14 through the protective pad 25, thereby fixing the auxiliary fuel tank 14. At the same time, the protective pad 25 can prevent the auxiliary fuel tank 14 from being worn.

[0026] Two guide telescopic rods 26 are fixedly installed on one side of the two L-shaped fixing frames 21, wherein the piston ends of two adjacent guide telescopic rods 26 are fixedly connected to one side of a movable plate 22. By setting the guide telescopic rods 26, the guide telescopic rods 26 can guide the movable plate 22 in the horizontal direction so that the movable plate 22 can keep moving in the horizontal direction.

[0027] The other ends of the two threaded rods 27 are fixedly mounted with ball handles 28 . The ball handles 28 can facilitate operators to rotate the threaded rods 27 .

[0028] The stirring mechanism 3 includes a stirring shaft 31, which passes through the auxiliary oil tank 14 and is rotatably connected to the axis of the auxiliary oil tank 14. A fixed roller 32 is fixedly installed on the stirring shaft 31, and a number of evenly distributed stirring blades 33 are fixedly installed on the fixed roller 32. By driving the stirring shaft 31 to rotate, the stirring shaft 31 can rotate the stirring blades 33 through the fixed roller 32, and the stirring blades 33 can stir the insulating oil in the auxiliary oil tank 14.

[0029] A motor 34 is fixedly installed at one end of the auxiliary oil tank 14, and a rotating rod 36 is fixedly installed at the driving output end of the motor 34. The rotating rod 36 and the auxiliary oil tank 14 are rotatably connected. A bevel gear 37 is fixedly installed at one end of the rotating rod 36 and one end of the stirring shaft 31. The two bevel gears 37 are meshed with each other. By turning on the motor 34, the driving shaft of the motor 34 can rotate the rotating rod 36, and the rotating rod 36 can rotate the stirring shaft 31 through the two bevel gears 37.

[0030] An L-shaped fixing block 35 is fixedly installed at the end of the motor 34, and one end of the L-shaped fixing block 35 is fixedly connected to the outer wall of the auxiliary oil tank 14. By setting the L-shaped fixing block 35, the L-shaped fixing block 35 can support and fix the motor 34, thereby improving the stability of the motor 34.

[0031] When the auxiliary oil tank 14 of the oil-immersed transformer body 1 needs to be installed, the operator first places the auxiliary oil tank 14 on the two support plates 12 and places it in the center, then rotates the two ball handles 28 respectively, the two ball handles 28 rotate the two threaded rods 27, the two threaded rods 27 drive the two moving plates 22 to approach each other, and the two moving plates 22 move the four arc-surface limit rings 24 synchronously through the four U-shaped frames 23 until the protective pads 25 in the four arc-surface limit rings 24 contact the two ends of the auxiliary oil tank 14 and then stop. The two spherical handles 28 are stopped from rotating. At this time, the four arc-surface limiting rings 24 limit and fix the auxiliary oil tanks 14 on the two support plates 12 through the four protective pads 25, and then the pipeline of the auxiliary oil tank 14 is connected to the oil tank and the pressure relief breathing device of the oil-immersed transformer body 1 through the flange, thereby conveniently realizing the fixed installation of the auxiliary oil tank 14 and facilitating the disassembly of the auxiliary oil tank 14 by the operating personnel, thereby effectively improving the convenience of installation and disassembly of the auxiliary oil tank 14, and at the same time improving the convenience of maintenance and replacement of the auxiliary oil tank 14;

[0032] During the operation of the oil-immersed transformer body 1, when the insulating oil in the oil tank of the oil-immersed transformer body 1 enters the auxiliary oil tank 14 through the pipeline, the operator turns on the motor 34, the driving shaft of the motor 34 rotates the rotating rod 36, the rotating rod 36 rotates the stirring shaft 31 through two bevel gears 37, the stirring shaft 31 rotates the multiple stirring blades 33 through the fixed roller 32, and the multiple stirring blades 33 stir the insulating oil in the auxiliary oil tank 14, so that the insulating oil entering the auxiliary oil tank 14 at different time periods is fully mixed, so that the temperature of the insulating oil in the auxiliary oil tank 14 is kept consistent, thereby improving the speed of insulating oil pressure relief.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fixing structure for an oil tank of an oil-immersed power transformer, comprising an oil-immersed transformer body (1) and an auxiliary oil tank (14), wherein the auxiliary oil tank (14) is connected to the oil tank in the oil-immersed transformer body (1) through a pipeline, and characterized in that: Two support frames (11) are fixedly mounted on the upper end surface of the oil-immersed transformer body (1), one end of the two support frames (11) is provided with a fixing mechanism (2) for fixing an auxiliary oil tank (14), and a stirring mechanism (3) is provided inside the auxiliary oil tank (14); The fixing mechanism (2) comprises two L-shaped fixing frames (21), one end of one of the L-shaped fixing frames (21) is fixedly mounted on one end of a supporting frame (11), one side of the two L-shaped fixing frames (21) is provided with a movable plate (22), both ends of the two movable plates (22) are fixedly mounted with a U-shaped frame (23), one end of two adjacent U-shaped frames (23) is fixedly mounted with an arc surface limiting ring (24), and threaded rods (27) are threadedly rotatably mounted on the two L-shaped fixing frames (21), one end of one of the threaded rods (27) is rotatably connected to one side of a movable plate (22).

2. A fixing structure for an oil tank of an oil-immersed power transformer as claimed in claim 1, characterized in that: A support plate (12) is fixedly mounted on one end of each of the two support frames (11), an anti-skid pad (13) is fixedly mounted on the inner walls of each of the two support plates (12), and an outer wall of the auxiliary oil tank (14) is in movable contact with the two anti-skid pads (13).

3. A fixing structure for an oil tank of an oil-immersed power transformer as claimed in claim 1, characterized in that: A protective pad (25) is fixedly mounted on the inner wall of the arc surface limiting ring (24), and an end of the auxiliary oil tank (14) is in movable contact with the protective pad (25).

4. A fixing structure for an oil tank of an oil-immersed power transformer as claimed in claim 1, characterized in that: Two guide telescopic rods (26) are fixedly mounted on one side of the two L-shaped fixing frames (21), wherein the piston ends of two adjacent guide telescopic rods (26) are fixedly connected to one side of a movable plate (22).

5. A fixing structure for an oil tank of an oil-immersed power transformer as claimed in claim 1, characterized in that: A spherical handle (28) is fixedly mounted on the other ends of the two threaded rods (27).

6. A fixing structure for an oil tank of an oil-immersed power transformer as claimed in claim 1, characterized in that: The stirring mechanism (3) comprises a stirring shaft (31), the stirring shaft (31) passing through the auxiliary oil tank (14) and being rotatably connected to the axis of the auxiliary oil tank (14), a fixed roller (32) being fixedly mounted on the stirring shaft (31), and a plurality of stirring blades (33) evenly distributed being fixedly mounted on the fixed roller (32).

7. A fixing structure for an oil tank of an oil-immersed power transformer as claimed in claim 6, characterized in that: A motor (34) is fixedly mounted on one end of the auxiliary oil tank (14); a rotating rod (36) is fixedly mounted on the drive output end of the motor (34); the rotating rod (36) and the auxiliary oil tank (14) are rotatably connected; a bevel gear (37) is fixedly mounted on one end of the rotating rod (36) and one end of the stirring shaft (31); and the two bevel gears (37) are meshed with each other.

8. A fixing structure for an oil tank of an oil-immersed power transformer as claimed in claim 7, characterized in that: An L-shaped fixing block (35) is fixedly mounted on the end of the motor (34), and one end of the L-shaped fixing block (35) is fixedly connected to the outer wall of the auxiliary oil tank (14).

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