Transformer oil cooler connecting mechanism

Abstract

The utility model discloses a transformer oil cooler connecting mechanism which comprises a transformer oil cooler and a transformer oil pipe, an oil inlet pipe and an oil outlet pipe are fixedly installed on the right side face of the transformer oil cooler respectively, a connecting structure is arranged between the transformer oil pipe and the oil inlet pipe and the oil outlet pipe, and the connecting structure is composed of a locking assembly and a sealing assembly. The anti-overflow assembly comprises conical rings fixedly installed on the inner wall of the oil inlet pipe, the inner wall of the oil outlet pipe and the inner wall of the oil pipe of the transformer and first conical sealing plugs slidably installed on the inner wall of the oil inlet pipe and the inner wall of the oil outlet pipe. After the transformer oil pipe is detached from the oil inlet pipe and the oil outlet pipe, a reset spring on the pushing component can push a first conical sealing plug and a second conical sealing plug to plug a conical ring, and therefore cooling oil can be prevented from overflowing out along the connecting position of the transformer oil pipe and the oil inlet pipe and the connecting position of the transformer oil pipe and the oil outlet pipe. And waste and loss of cooling oil are avoided.

Description

Technical Field

[0001] The utility model relates to the field of transformers, in particular to a connecting mechanism for a transformer oil cooler. Background Technique

[0002] The cooling system is an indispensable part of large and medium-capacity transformer components. The circulating oil path between the cooler and the transformer is generally a steel pipe. At present, the oil path steel pipes between domestic large-capacity transformers and coolers generally adopt the forms of welding and bolt connection, which are rigid connections and are prone to vibration damage.

[0003] China Patent Grant Publication No. CN213150527U discloses a new anti-seismic connection structure between a transformer oil tank and a cooler, belonging to the technical field of transformer manufacturing equipment. The technical solution is as follows: butterfly valves are installed at the top and bottom of the circulating oil path, a submerged oil pump is installed at the lower part of the cooler and connected to the lower connecting pipe, the upper part of the cooler is connected to the upper connecting pipe by bolts, and there are two fixed flange stainless steel bellows, which are respectively arranged between the upper connecting pipe and the butterfly valve and between the lower connecting pipe and the butterfly valve. The beneficial effect of the utility model is that stainless steel bellows are arranged in the circulating oil path. During an earthquake, the bellows buffer the deformation and displacement of the cooler, the oil tank and the steel connecting pipe due to the earthquake action through its own elastic deformation and the annular shock-absorbing rubber pads in the flange mounting holes, reduce the damage to the circulating oil path between the oil tank and the cooler caused by the earthquake, and reduce economic losses.

[0004] However, the device still has the following defects in use: when the transformer oil cooler needs to be disassembled and repaired, since the oil pipes and the inside of the transformer oil cooler are both filled with cooling oil, therefore, after disassembly, the cooling oil will overflow from the connection between the oil pipes and the outlet pipe and the inlet pipe of the transformer oil cooler, thus causing the loss and waste of the cooling oil. In view of the above defects: for this reason, we propose a connecting mechanism for a transformer oil cooler. Content of the Utility Model

[0005] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose a connecting mechanism for a transformer oil cooler.

[0006] In order to solve the problems existing in the prior art, the utility model adopts the following technical scheme: a connecting mechanism for a transformer oil cooler, comprising: a transformer oil cooler and a transformer oil pipe. The right side surface of the transformer oil cooler is respectively fixedly installed with an inlet pipe and a drain pipe. A connecting structure is arranged between the transformer oil pipe and the inlet pipe and the drain pipe. The connecting structure is composed of a locking component, a sealing component and an anti-overflow component;

[0007] The anti-overflow component includes conical rings respectively and fixedly installed on the inner walls of the inlet oil pipe, the outlet oil pipe, and the transformer oil pipe, a first conical sealing plug slidably installed on the inner walls of the inlet oil pipe and the outlet oil pipe, a second conical sealing plug slidably installed on the inner wall of the transformer oil pipe, and a pushing component capable of driving the first conical sealing plug and the second conical sealing plug to move. Oil leakage holes are formed on the surfaces of the first conical sealing plug and the second conical sealing plug.

[0008] Preferably, the locking component includes spherical grooves formed on the surfaces of the inlet oil pipe and the outlet oil pipe, strip-shaped grooves formed on the inner walls of the spherical grooves, spheres slidably installed on the inner walls of the strip-shaped grooves, and locking nuts threadedly connected to the surfaces of the inlet oil pipe and the outlet oil pipe. The inner ring surface of the locking nut is provided with a ramp surface, and a ball groove adapted to the sphere is formed on the surface of the transformer oil pipe.

[0009] Preferably, the pushing component includes an adapter pipe fixedly installed on the opposite surfaces of the first conical sealing plug and the second conical sealing plug, an oil discharge hole formed on the surface of the adapter pipe, and a flange ring fixedly installed on one side of the adapter pipe.

[0010] Preferably, reset components capable of driving the first conical sealing plug and the second conical sealing plug to approach the conical ring are respectively arranged on the inner wall of the transformer oil pipe.

[0011] Preferably, the sealing component includes a sealing ring, sealing rings respectively and fixedly installed on the inner walls of the inlet oil pipe and the outlet oil pipe, and limiting rings respectively and fixedly installed on the inner walls of the inlet oil pipe and the outlet oil pipe.

[0012] Preferably, the sealing component includes a sealing ring, sealing rings respectively and fixedly installed on the inner walls of the inlet oil pipe and the outlet oil pipe, and limiting rings respectively and fixedly installed on the inner walls of the inlet oil pipe and the outlet oil pipe.

[0013] Preferably, the inner diameter of the sealing ring is adapted to the outer diameter of the transformer oil pipe.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By providing the anti-overflow component, when the transformer oil pipe is disassembled from the inlet oil pipe and the outlet oil pipe, the reset springs on the pushing component will respectively push the first conical sealing plug and the second conical sealing plug to block the conical ring, thereby avoiding the cooling oil from overflowing along the connection between the transformer oil pipe and the inlet oil pipe and the outlet oil pipe, and avoiding the waste and loss of the cooling oil.

[0016] 2. By setting the locking assembly, when the transformer oil pipe is inserted into the oil inlet pipe and the oil drain pipe, the ball groove will be in the ball position. Then, tightening the locking nut can drive the slope surface of the locking nut to push the ball into the ball groove, so that the transformer oil pipe can be fixed by using the cooperation of the ball and the ball groove. Moreover, after loosening the locking nut, the ball will be separated from the ball groove, so that the transformer oil pipe can be taken out, and then the transformer oil pipe can be quickly connected and disassembled with the oil inlet pipe and the oil drain pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations. In the drawings:

[0018] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0019] Figure 2 It is a three-dimensional schematic diagram of the oil inlet pipe of the utility model;

[0020] Figure 3 It is a front cross-sectional schematic diagram of the oil inlet pipe of the utility model;

[0021] Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle;

[0022] Figure 5 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0023] Figure 6 This is a schematic diagram of the transformer oil pipe of the utility model.

[0024] Serial numbers in the figure: 1 transformer oil cooler, 2 transformer oil pipe, 3 oil inlet pipe, 4 oil discharge pipe, 5 ball, 6 locking nut, 7 ball groove, 8 tapered ring, 9 first tapered sealing plug, 10 second tapered sealing plug, 11 oil leakage hole, 12 connecting pipe, 13 oil discharge hole, 14 limit ring, 15 flange ring, 16 sealing ring, 17 retaining ring, 18 return spring, 19 sealing ring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figures 1-6, the present utility model provides a technical solution: a connecting mechanism for a transformer oil cooler, comprising: a transformer oil cooler 1 and a transformer oil pipe 2. An oil inlet pipe 3 and an oil discharge pipe 4 are respectively fixedly installed on the right side surface of the transformer oil cooler 1. A connecting structure is provided between the transformer oil pipe 2 and the oil inlet pipe 3 and the oil discharge pipe 4. The connecting structure is composed of a locking assembly, a sealing assembly, and an anti-overflow assembly.

[0027] Referring to FIGS. 1-3, the locking assembly includes spherical grooves opened on the surfaces of the oil inlet pipe 3 and the oil discharge pipe 4, strip-shaped grooves opened on the inner walls of the spherical grooves, spheres 5 slidably installed on the inner walls of the strip-shaped grooves, and locking nuts 6 threadedly connected to the surfaces of the oil inlet pipe 3 and the oil discharge pipe 4. The spherical grooves can prevent the spheres 5 from sliding out of the strip-shaped grooves, and the inner ring surface of the locking nut 6 is provided with a ramp surface. A ball groove 7 adapted to the spheres 5 is opened on the surface of the transformer oil pipe 2.

[0028] Insert the transformer oil pipe 2 into the oil inlet pipe 3 or the oil discharge pipe 4, and then tighten the locking nut 6, which can drive the ramp surface of the locking nut 6 to push the sphere 5 into the ball groove 7, so that the transformer oil pipe 2 can be fixed by the cooperation of the sphere 5 and the ball groove 7. Moreover, after loosening the locking nut 6, the sphere 5 will disengage from the ball groove 7 at this time, so that the transformer oil pipe 2 can be taken out, and thus the transformer oil pipe 2 can be quickly connected to and disassembled from the oil inlet pipe 3 and the oil discharge pipe 4.

[0029] Referring to Figures 3-6 , the anti-overflow assembly includes tapered rings 8 respectively fixedly installed on the inner walls of the oil inlet pipe 3, the oil discharge pipe 4, and the transformer oil pipe 2, a first tapered sealing plug 9 slidably installed on the inner walls of the oil inlet pipe 3 and the oil discharge pipe 4, a second tapered sealing plug 10 slidably installed on the inner wall of the transformer oil pipe 2, and a pushing member for driving the first tapered sealing plug 9 and the second tapered sealing plug 10 to move. Oil leakage holes 11 are opened on the surfaces of the first tapered sealing plug 9 and the second tapered sealing plug 10. When the first tapered sealing plug 9 and the second tapered sealing plug 10 contact the tapered rings 8, a sealing surface can be formed, thereby avoiding the cooling oil from flowing out through the tapered rings 8.

[0030] The pushing member includes an adapter pipe 12 fixedly installed on the opposite surfaces of the first tapered sealing plug 9 and the second tapered sealing plug 10, an oil discharge hole 13 opened on the surface of the adapter pipe 12, and a flange ring 15 fixedly installed on one side of the adapter pipe 12.

[0031] After the transformer oil pipe 2 is connected to the inlet oil pipe 3 or the drain oil pipe 4, the connecting pipe 12 inside the transformer oil pipe 2 will contact the connecting pipe 12 inside the inlet oil pipe 3 or the drain oil pipe 4 at this time, and push the two connecting pipes 12 away from each other, so that the conical ring 8 can be opened, and the cooling oil can flow out along the inner wall of the conical ring 8, so that the cooling oil can flow into the connecting pipe 12 through the drain hole 13, and then the cooling oil in the transformer oil cooler 1 and the transformer oil pipe 2 can converge and communicate with each other.

[0032] Refer to Figure 3 , the sealing assembly includes a sealing ring 19, sealing rings 16 respectively fixedly installed on the inner walls of the inlet oil pipe 3 and the drain oil pipe 4, and limiting rings 14 respectively fixedly installed on the inner walls of the inlet oil pipe 3 and the drain oil pipe 4. The inner diameter of the sealing ring 19 is adapted to the outer diameter of the transformer oil pipe 2.

[0033] After the transformer oil pipe 2 enters the inlet oil pipe 3 or the drain oil pipe 4, at this time, the sealing ring 16 can form a sealing surface between the transformer oil pipe 2 and the inlet oil pipe 3 or the drain oil pipe 4 to prevent the cooling oil from flowing out. Moreover, the sealing ring 19 is sleeved on the outer surface of the connecting pipe 12. When the connecting pipe 12 inside the transformer oil pipe 2 contacts the connecting pipe 12 inside the inlet oil pipe 3 or the drain oil pipe 4 and pushes the two connecting pipes 12 away from each other, the flange ring 15 will approach the limiting ring 14 at this time, so as to squeeze the sealing ring 19. On the one hand, the sealing can be improved, and on the other hand, the moving range of the connecting pipe 12 can be limited.

[0034] Refer to Figure 3 and Figure 6 , reset components for driving the first conical sealing plug 9 and the second conical sealing plug 10 to approach the conical ring 8 are respectively arranged on the inner walls of the inlet oil pipe 3, the drain oil pipe 4, and the transformer oil pipe 2. The reset components include retaining rings 17 respectively fixedly installed on the inner walls of the inlet oil pipe 3, the drain oil pipe 4, and the transformer oil pipe 2, and a reset spring 18 fixedly installed on one side of the retaining ring 17.

[0035] When the connecting pipe 12 inside the transformer oil pipe 2 contacts the connecting pipe 12 inside the inlet oil pipe 3 or the drain oil pipe 4 and pushes the two connecting pipes 12 away from each other, since the retaining ring 17 limits the reset spring 18, the reset spring 18 will contract and store energy at this time, so that the first conical sealing plug 9 and the second conical sealing plug 10 can be pushed to contact the conical ring 8 after the two connecting pipes 12 are separated, so as to form a seal.

[0036] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent replacement or change made by those skilled in the art according to the technical solution and its concept of the present invention should be covered within the protection scope of the present invention.

Claims

1. A transformer oil cooler connection mechanism, comprising: Transformer oil cooler (1) and transformer oil pipe (2), characterized in that an oil inlet pipe (3) and an oil drain pipe (4) are fixedly installed on the right side surface of the transformer oil cooler (1), and a connection structure is provided between the transformer oil pipe (2) and the oil inlet pipe (3) and the oil drain pipe (4). The connection structure is composed of a locking assembly, a sealing assembly, and an anti-overflow assembly; The anti-overflow assembly includes conical rings (8) fixedly installed on the inner walls of the oil inlet pipe (3), the oil drain pipe (4), and the transformer oil pipe (2) respectively, a first conical sealing plug (9) slidably installed on the inner walls of the oil inlet pipe (3) and the oil drain pipe (4), a second conical sealing plug (10) slidably installed on the inner wall of the transformer oil pipe (2), and a pushing member capable of driving the first conical sealing plug (9) and the second conical sealing plug (10) to move. Oil leakage holes (11) are formed on the surfaces of the first conical sealing plug (9) and the second conical sealing plug (10).

2. The connection mechanism of a transformer oil cooler according to claim 1, characterized in that: The locking assembly includes spherical grooves formed on the surfaces of the oil inlet pipe (3) and the oil drain pipe (4), strip-shaped grooves formed on the inner walls of the spherical grooves, spheres (5) slidably installed on the inner walls of the strip-shaped grooves, and locking nuts (6) threadedly connected to the surfaces of the oil inlet pipe (3) and the oil drain pipe (4). The inner ring surface of the locking nut (6) is provided with a ramp surface, and a ball groove (7) adapted to the sphere (5) is formed on the surface of the transformer oil pipe (2).

3. The connection mechanism of a transformer oil cooler according to claim 1, wherein: The pushing member includes a connecting pipe (12) fixedly installed on the opposite surfaces of the first conical sealing plug (9) and the second conical sealing plug (10), an oil drain hole (13) formed on the surface of the connecting pipe (12), and a flange ring (15) fixedly installed on one side of the connecting pipe (12).

4. The connection mechanism of a transformer oil cooler according to claim 3, characterized in that: Reset members capable of driving the first conical sealing plug (9) and the second conical sealing plug (10) to approach the conical ring (8) are respectively provided on the inner wall of the transformer oil pipe (2).

5. The connection mechanism of a transformer oil cooler according to claim 4, characterized in that: The reset members include retaining rings (17) fixedly installed on the inner walls of the oil inlet pipe (3), the oil drain pipe (4), and the transformer oil pipe (2) respectively, and reset springs (18) fixedly installed on one side of the retaining rings (17).

6. The connection mechanism of a transformer oil cooler according to claim 1, characterized in that: The sealing assembly includes a sealing ring (19), sealing rings (16) fixedly installed on the inner walls of the oil inlet pipe (3) and the oil drain pipe (4) respectively, and limiting rings (14) fixedly installed on the inner walls of the oil inlet pipe (3) and the oil drain pipe (4) respectively.

7. The connection mechanism of a transformer oil cooler according to claim 6, characterized in that: The inner diameter of the sealing ring (19) is adapted to the outer diameter of the transformer oil pipe (2).

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