Hot oil circulation structure of oil-immersed transformer

Abstract

The utility model relates to a hot oil circulation structure of an oil-immersed transformer, which comprises a transformer oil tank, an oil outlet pipe, an oil return pipe, an oil guide pipe, an oil filter pipe and a vacuum oil filter, the oil outlet pipe is arranged at the bottom of one side wall of the transformer oil tank, and the oil return pipe is arranged at the bottom of the opposite side wall. The oil return pipe is communicated with an oil guide pipe vertically arranged in a transformer oil tank, a top outlet of the oil guide pipe is arranged below the liquid level of transformer oil, the oil outlet pipe and the oil return pipe are respectively provided with an on-off valve, an oil filter pipe is detachably connected between the oil outlet pipe and the oil return pipe, and the middle of the oil filter pipe is connected with a vacuum oil filter. The oil filter is convenient in oil filtering operation, avoids impact of oil flow on the filter body, reduces heat loss, and improves hot oil circulation efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transformer technical field, especially relate to a hot oil circulation structure of oil -immersed transformer. BACKGROUND

[0002] Transformer oil is the main insulation, cooling medium of oil -immersed transformer, and the electrical strength and chemical composition are directly influenced the performance of transformer.If a small amount of water and impurities are contained in the oil, the insulation strength will be reduced.The impurities and water produced by the insulating oil in the transformer after a period of use need to be filtered and then injected into the transformer for use.

[0003] The oil injection port of the filtered transformer oil of the existing oil -immersed transformer is at the top of the oil tank, when the height of the transformer exceeds 2 meters, the operator needs to open and close the oil injection port valve by climbing up and down the transformer with the help of a ladder, which is inconvenient to operate.The transformer oil injected by the top oil injection port has no directionality and has impact on the body of the transformer. SUMMARY

[0004] The utility model solves the technical problem to provide a hot oil circulation structure of oil -immersed transformer, and the oil flow is avoided to the impact on the body of the transformer, the heat loss is reduced, and the hot oil circulation efficiency is improved.

[0005] To realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A hot oil circulation structure of oil -immersed transformer, including transformer oil tank, oil outlet pipe, oil return pipe, oil guide pipe, oil filter pipe and vacuum oil filter, the oil outlet pipe is arranged at the bottom of the side wall of transformer oil tank, the oil return pipe is arranged at the bottom of the opposite side wall, the oil return pipe is communicated with the vertical oil guide pipe in the transformer oil tank, the top outlet of the oil guide pipe is arranged below the liquid level of transformer oil, the opening and closing valve is arranged on the oil outlet pipe and the oil return pipe, the oil filter pipe is detachably connected between the oil outlet pipe and the oil return pipe, and the middle part of the oil filter pipe is connected with the vacuum oil filter.

[0007] The oil outlet pipe and the oil return pipe are diagonally arranged, and the height of the oil outlet pipe and the oil return pipe is consistent.

[0008] The oil guide pipe includes a horizontal section pipe body and a vertical section pipe body, and the horizontal section pipe body is connected with the oil return pipe through a flange.

[0009] The distance between the top of the oil guide pipe and the top cover of the transformer oil tank is 100-150mm.

[0010] The top outlet of the oil guide pipe is inclined.

[0011] The opening and closing valve is a ball valve.

[0012] The oil filter pipe is connected with the oil outlet pipe, the oil return pipe and the vacuum oil filter through quick connectors.

[0013] Compared with the prior art, the oil filter pipe has the advantages that:

[0014] 1. The opening and closing valves of the oil outlet pipe and the oil return pipe are arranged at the bottom of the transformer oil tank, and the valve can be opened and closed on the ground, so that climbing is reduced and operation is facilitated.

[0015] 2. The outlet at the top of the oil guide pipe is arranged below the liquid level of the transformer oil, has a vacuum oil injection function, and the outlet is inclined to avoid the impact of oil flow on the body.

[0016] 3. The opening and closing valves of the oil outlet pipe and the oil return pipe are ball valves, which can be operated multiple times, avoiding the possibility of leakage of ordinary butterfly valves after being opened multiple times, and improving the reliability of oil filtration.

[0017] 4. Compared with the traditional hot oil circulating transformer, the length of the oil filter pipe is reduced, the heat loss is reduced, and the hot oil circulating efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the utility model.

[0019] Figure 2 is a structural schematic view of the oil guide pipe. DETAILED DESCRIPTION

[0020] In the description of the utility model, it is understood that the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0021] Unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0022] The oil circulation structure of the oil-immersed transformer comprises a transformer oil tank 1, an oil outlet pipe 2, an oil return pipe 3, an oil guide pipe 4, an oil filter pipe 5 and a vacuum oil filter 6, the oil outlet pipe 2 is arranged at the bottom of one side wall of the transformer oil tank 1, the oil return pipe 3 is arranged at the bottom of the opposite side wall, the oil return pipe 3 is communicated with the vertically arranged oil guide pipe 4 in the transformer oil tank 1, the top outlet of the oil guide pipe 4 is arranged below the liquid level of the transformer oil, the opening and closing valves 7 are arranged on the oil outlet pipe 2 and the oil return pipe 3, the oil filter pipe 5 is detachably connected between the oil outlet pipe 2 and the oil return pipe 3, and the middle part of the oil filter pipe 5 is connected with the vacuum oil filter 6.

[0023] The oil outlet pipe 2 and the oil return pipe 3 are diagonally arranged, and the heights of the oil outlet pipe 2 and the oil return pipe 3 are consistent.

[0024] The oil guide pipe 4 comprises a horizontal pipe body 41 and a vertical pipe body 42, and the horizontal pipe body 41 is connected with the oil return pipe 3 through a flange 43.

[0025] The distance between the top of the oil guide pipe 4 and the top cover of the transformer oil tank 1 is 100-150mm.

[0026] The top outlet of the oil guide pipe 4 is arranged in an inclined manner.

[0027] The opening and closing valve 7 is a ball valve.

[0028] The oil filter pipe 5 is connected with the oil outlet pipe 2, the oil return pipe 3 and the vacuum oil filter 6 through quick connectors.

[0029] During oil filtering, the oil outlet pipe 2 and the oil return pipe 3 are connected with the oil filter pipe 5 and the vacuum oil filter 6 through the quick connectors. Since the opening and closing valves of the oil outlet pipe 2 and the oil return pipe 3 are arranged at the bottom of the transformer oil tank, the valves can be opened and closed on the ground, thereby reducing the climbing and facilitating the operation. The top outlet of the oil guide pipe 4 is arranged below the liquid level of the transformer oil, has the vacuum oil injection function, and is inclined, thereby avoiding the impact of the oil flow on the body. Compared with the traditional hot oil circulation transformer, the length of the oil filter pipe 5 is reduced, the heat loss is reduced, and the hot oil circulation efficiency is improved.

[0030] In order to make the purpose, technical scheme and technical effect of the utility model more clear, the technical scheme in the utility model embodiment is clearly and completely described. However, the following described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by the person skilled in the art without creative labor under the combination of the embodiments in the utility model belong to the protection scope of the utility model.

[0031] Embodiment 1:

[0032] The oil circulation structure of the oil-immersed transformer comprises a transformer oil tank 1, an oil outlet pipe 2, an oil return pipe 3, an oil guide pipe 4, an oil filter pipe 5 and a vacuum oil filter 6, the oil outlet pipe 2 is arranged at the bottom of one side wall of the transformer oil tank 1, the oil return pipe 3 is arranged at the bottom of the opposite side wall, the oil return pipe 3 is communicated with the vertically arranged oil guide pipe 4 in the transformer oil tank 1, the top outlet of the oil guide pipe 4 is arranged below the liquid level of the transformer oil, the oil guide pipe 4 comprises a horizontal section pipe body 41 and a vertical section pipe body 42, the horizontal section pipe body 41 is connected with the oil return pipe 3 through a flange 43, the vertical section pipe body 42 is fixedly connected with the inner wall of the transformer oil tank 1, and the top outlet of the oil guide pipe 4 is arranged in an inclined manner by 45°.

[0033] The oil outlet pipe 2 and the oil return pipe 3 are both provided with an open-close valve 7, the oil filter pipe 5 is detachably connected between the oil outlet pipe 2 and the oil return pipe 3, the middle part of the oil filter pipe 5 is connected with the vacuum oil filter 6, and the oil filter pipe 5, the oil outlet pipe 2, the oil return pipe 3 and the vacuum oil filter 6 are all connected through quick connectors.

[0034] Embodiment 2

[0035] The oil circulation structure of the oil-immersed transformer comprises a transformer oil tank 1, an oil outlet pipe 2, an oil return pipe 3, an oil guide pipe 4, an oil filter pipe 5 and a vacuum oil filter 6, the oil outlet pipe 2 is arranged at the bottom of one side wall of the transformer oil tank 1, the oil return pipe 3 is arranged at the bottom of the opposite side wall, the oil outlet pipe 2 and the oil return pipe 3 are diagonally arranged, and the heights of the oil outlet pipe 2 and the oil return pipe 3 are consistent.

[0036] The oil return pipe 3 is communicated with the vertically arranged oil guide pipe 4 in the transformer oil tank 1, the top outlet of the oil guide pipe 4 is arranged below the liquid level of the transformer oil, the oil guide pipe 4 comprises a horizontal section pipe body 41 and a vertical section pipe body 42, the horizontal section pipe body 41 is connected with the oil return pipe 3 through a flange 43, the vertical section pipe body 42 is fixedly connected with the inner wall of the transformer oil tank 1, and the top outlet of the oil guide pipe 4 is arranged in an inclined manner by 50°. The distance between the top of the oil guide pipe 4 and the top cover of the transformer oil tank 1 is 100 mm.

[0037] The oil outlet pipe 2 and the oil return pipe 3 are both provided with a ball valve, the oil filter pipe 5 is detachably connected between the oil outlet pipe 2 and the oil return pipe 3, the middle part of the oil filter pipe 5 is connected with the vacuum oil filter 6, and the oil filter pipe 5, the oil outlet pipe 2, the oil return pipe 3 and the vacuum oil filter 6 are all connected through quick connectors.

[0038] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot oil circulation structure of an oil-immersed transformer, characterized by comprising: The transformer oil tank, the oil outlet pipe, the oil return pipe, the oil guide pipe, the oil filter pipe and the vacuum oil filter are arranged, the oil outlet pipe is arranged at the bottom of one side wall of the transformer oil tank, the oil return pipe is arranged at the bottom of the opposite side wall, the oil return pipe is communicated with the vertical oil guide pipe in the transformer oil tank, the top outlet of the oil guide pipe is arranged below the liquid level of the transformer oil, the opening and closing valves are arranged on the oil outlet pipe and the oil return pipe, the oil filter pipe is detachably connected between the oil outlet pipe and the oil return pipe, and the middle part of the oil filter pipe is connected with the vacuum oil filter.

2. The hot oil circulation structure of an oil-immersed transformer according to claim 1, characterized by The oil outlet pipe and the oil return pipe are diagonally arranged, and the heights of the oil outlet pipe and the oil return pipe are consistent.

3. The hot oil circulation structure of an oil-immersed transformer according to claim 1, characterized by The oil guide pipe comprises a horizontal pipe body and a vertical pipe body, and the horizontal pipe body is connected with the oil return pipe through a flange.

4. The hot oil circulation structure of an oil-immersed transformer according to claim 1, characterized by The distance between the top of the oil guide pipe and the top cover of the transformer oil tank is 100-150 mm.

5. The hot oil circulation structure of an oil-immersed transformer according to claim 1, characterized by The top outlet of the oil guide pipe is arranged in an inclined manner.

6. The hot oil circulation structure of an oil-immersed transformer according to claim 1, characterized by The opening and closing valve is a ball valve.

7. The hot oil circulation structure of an oil-immersed transformer according to claim 1, characterized by The oil filter pipe, the oil outlet pipe, the oil return pipe and the vacuum oil filter are connected through quick connectors.

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