Oil-immersed transformer

Abstract

The utility model discloses an oil-immersed transformer which comprises an oil tank, an air cooling heat dissipation structure, a cooling tank, a water cooling heat dissipation structure and a refrigeration structure. An oil conservator is arranged on one side of the top of the oil tank, the air-cooling heat dissipation structures are arranged at the front end and the rear end of the oil tank, the cooling tank is arranged on the other side of the oil tank, the water-cooling heat dissipation structure is arranged on one side in the cooling tank, and the refrigeration structure is arranged on the other side in the cooling tank. Compared with the prior art, the transformer oil cooling device has the advantages that air circulation at the first cooling fins can be improved through the first cooling fan, hot air can be rapidly dissipated out of the protective shell, transformer oil in the oil tank can be sucked into the cooling coil through the oil pump, and the cooling effect is improved. The cooling water in the cold water cavity absorbs heat and cools the transformer oil, the cooled transformer oil returns to the oil tank, and the transformer oil is continuously cooled through continuous circulation, so that the effect of facilitating heat dissipation is achieved.

Description

Technical Field

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

[0002] Oil-type transformer, also known as oil-immersed transformer, is a structural type of transformer, that is, the coil of the transformer is immersed in oil. Due to the need for fire protection, oil-immersed transformers are generally installed in a separate transformer room or outdoors. They have the characteristics of large size, low cost, simple maintenance, good heat dissipation, strong overload capacity, and wide adaptability to the environment.

[0003] The patent document with announcement number CN221262077U discloses an oil-immersed transformer, including an oil tank, a high-voltage insulating bushing, a high-voltage outlet terminal, a low-voltage insulating bushing, a low-voltage outlet terminal, a heat sink, an oil pillow, a bellows, a support mechanism, a gas relay, and a connecting pipe. The utility model rotates the knob to rotate the screw, thereby causing the support pipe threaded therewith to move horizontally, thereby driving the moving pipe to move, and by rotating the control member, driving the first support plate to tilt, thereby supporting the bellows, alleviating the impact force of the oil falling from the oil pillow to the vertical part of the bellows, avoiding the situation where the bellows connection becomes loose due to frequent impact force, and avoiding oil leakage, and supporting the gas relay through the support device, and by rotating the second support plate, driving the threaded rod to rotate inside the support rod and the base, thereby adjusting the height upward, adapting to and supporting different gas relays, and improving the flexibility of the support seat supporting the gas relay, but the prior art still has defects:

[0004] (1) The existing oil-immersed transformer has a single heat dissipation method and poor heat dissipation performance. The oil-immersed transformer generates heat and forms high temperature during operation. The existing oil-immersed transformer transfers the heat to the side wall of the oil tank, and the side wall of the oil tank transfers the heat to the heat sink. The heat is dissipated through the heat exchange between the heat sink and the external air. However, the heat dissipation efficiency of the transformer is low when the heat sink is used alone. If the transformer is exposed to high temperature for a long time, it will have an irreversible impact on its service life.

[0005] (2) The oil-immersed transformer of the prior art is prone to overheating of the transformer oil after long-term use. However, the transformer oil is inside the oil-immersed transformer and can only be dissipated through the external heat sink, which is not easy to dissipate heat, thus reducing its service life and affecting the normal operation of the oil-immersed transformer. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects and provide an oil-immersed transformer.

[0007] In order to solve the above technical problems, the technical solution provided by the utility model is: an oil-immersed transformer, comprising:

[0008] An oil tank, wherein an oil pillow is provided on one side of the top of the oil tank;

[0009] An air-cooled heat dissipation structure, the air-cooled heat dissipation structure is arranged at the front and rear ends of the oil tank, the air-cooled heat dissipation structure includes a protective shell fixedly installed at the front and rear ends of the oil tank, a plurality of heat sinks are fixedly installed on the outer walls of the front and rear ends of the oil tank, the heat sink is arranged inside the protective shell, a through hole is opened on the side of the protective shell away from the oil tank, a heat dissipation fan is fixedly installed in the through hole, and a dust screen is fixedly installed on the side of the inner wall of the through hole away from the heat sink;

[0010] A cooling box, the cooling box is arranged on the other side of the oil tank, a cold water cavity is opened on the side of the cooling box close to the oil tank, and a refrigeration cavity is opened inside the cooling box on the side away from the oil tank;

[0011] A water-cooled heat dissipation structure, which is arranged on one side of the interior of the cooling box, and includes a cooling coil arranged in the cold water cavity, the two ends of the cooling coil are respectively connected to the upper and lower parts of the inner cavity of the oil tank, an oil pump is installed on the lower part of the cooling coil, and a water level sensor is fixedly installed on one side of the inner wall of the cold water cavity;

[0012] A refrigeration structure is arranged on the other side of the cooling box, and the refrigeration structure includes a temperature conducting block fixedly connected to the inner wall of the refrigeration chamber on the side close to the cold water chamber, one side of the temperature conducting block is fixedly connected to a semiconductor refrigeration sheet, and the other side of the temperature conducting block penetrates into the cold water chamber, one side of the semiconductor refrigeration sheet is fixedly connected to a plurality of heat sinks 2, a through hole 2 is opened on the side of the cooling box away from the oil tank, a heat dissipation fan 2 is fixedly installed in the through hole 2, and a dust screen 2 is fixedly installed on the side of the inner wall of the through hole 2 away from the heat sink 2.

[0013] Furthermore, the oil pillow is fixedly connected with a connecting pipe, and the connecting pipe extends into the oil tank.

[0014] Furthermore, a water inlet pipe is fixedly connected to the rear end of the top of the cold water chamber, and a sealing cover is threadedly connected to the water inlet pipe.

[0015] Furthermore, the top rear side of the oil tank is provided with evenly distributed high-pressure outlet terminals, and the top front side of the oil tank is provided with evenly distributed low-pressure outlet terminals.

[0016] The advantages of the utility model compared with the prior art are:

[0017] (1) In the utility model, the air-cooled heat dissipation structure is provided, and the heat sink absorbs the heat in the oil tank and dissipates it in a short time. When the heat dissipation fan is started, the air circulation in the protective shell is increased, and the hot air is quickly dissipated to the outside of the protective shell, so that the low temperature and constant temperature state in the protective shell are maintained, thereby improving the heat dissipation effect;

[0018] (2) In the utility model, a water-cooled heat dissipation structure and a refrigeration structure are set up, and an oil pump is used to suck the transformer oil in the oil tank into the cooling coil. The cooling water in the cold water chamber absorbs heat and cools the transformer oil. The cooled transformer oil returns to the oil tank and is continuously cooled through continuous circulation. By starting the semiconductor refrigeration sheet, the temperature conduction block can be continuously cooled, and the cooling water inside the cold water chamber can be continuously cooled through the temperature conduction block. Then, the hot surface of the semiconductor refrigeration sheet is dissipated by the heat sink 2. At the same time, the heat dissipation fan 2 is used to cool the water inside the cold water chamber, so that the water inside the cold water chamber can be continuously cooled, thereby achieving the effect of facilitating heat dissipation and improving the heat dissipation efficiency of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a three-dimensional diagram of an oil-immersed transformer.

[0020] Figure 2 It is a front view of an oil-immersed transformer of the utility model.

[0021] Figure 3 It is a front sectional view of an oil-immersed transformer of the utility model.

[0022] Figure 4 It is a side sectional view of an oil-immersed transformer of the utility model.

[0023] Figure 5 The utility model is an oil-immersed transformer Figure 3 Enlarged structural diagram at point A in the middle.

[0024] Indications in the figure: 1. Oil tank; 2. Air-cooled heat dissipation structure; 21. Protective shell; 22. Heat sink one; 23. Heat dissipation fan one; 24. Dust screen one; 3. Cooling box; 31. Cold water chamber; 32. Refrigeration chamber; 4. Water-cooled heat dissipation structure; 41. Cooling coil; 42. Oil pump; 43. Water level sensor; 5. Refrigeration structure; 51. Temperature conduction block; 52. Semiconductor refrigeration sheet; 53. Heat sink two; 54. Heat dissipation fan two; 55. Dust screen two; 6. Oil pillow; 7. High-voltage outlet terminal; 8. Low-voltage outlet terminal. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0026] 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. 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.

[0027] like Figures 1 to 5 As shown, this embodiment proposes an oil-immersed transformer, including an oil tank 1, an oil pillow 6 is provided on one side of the top of the oil tank 1, the oil pillow 6 is fixedly connected with a connecting pipe, the connecting pipe extends into the oil tank 1, the top rear side of the oil tank 1 is provided with evenly distributed high-voltage outlet terminals 7, the top front side of the oil tank 1 is provided with evenly distributed low-voltage outlet terminals 8, wherein a temperature sensor can be installed on the outside of the oil tank 1 to monitor the temperature of the oil tank 1 in real time.

[0028] An air-cooled heat dissipation structure 2 is provided at the front and rear ends of the oil tank 1. The air-cooled heat dissipation structure 2 includes a protective shell 21 fixedly installed at the front and rear ends of the oil tank 1. A plurality of heat sinks 22 are fixedly installed on the outer walls of the front and rear ends of the oil tank 1. The heat sink 22 is arranged inside the protective shell 21. The arrangement of the protective shell 21 prevents the internal heat sink 22 from being damaged by collision, rain, etc., so as to avoid the reduction of its heat dissipation performance and the failure of the transformer to dissipate heat in time, resulting in a reduction in its life. A through hole 1 is provided on the side of the protective shell 21 away from the oil tank 1. A heat dissipation fan 23 is fixedly installed in the through hole 1. A dustproof net 24 is fixedly installed on the side of the inner wall of the through hole 1 away from the heat sink 22. The heat sink 22 absorbs the heat in the oil tank 1 and dissipates it in a short time. The heat dissipation fan 23 is started to increase the air circulation in the protective shell 21, so that the hot air quickly escapes to the outside of the protective shell 21, maintains the low temperature constant temperature state in the protective shell 21, and improves the heat dissipation effect.

[0029] A cooling box 3 is provided on the other side of the oil tank 1. A cold water chamber 31 is provided on the side of the cooling box 3 close to the oil tank 1. A refrigeration chamber 32 is provided on the side of the cooling box 3 away from the oil tank 1. A water inlet pipe is fixedly connected to the rear end of the top of the cold water chamber 31. A sealing cap is threadedly connected to the water inlet pipe to facilitate replenishing water to the cold water chamber 31.

[0030] A water-cooled heat dissipation structure 4 is provided on one side of the interior of the cooling box 3. The water-cooled heat dissipation structure 4 includes a cooling coil 41 arranged in the cold water chamber 31. The two ends of the cooling coil 41 are respectively connected to the upper and lower parts of the inner cavity of the oil tank 1. An oil pump 42 is installed on the lower part of the cooling coil 41. A water level sensor 43 is fixedly installed on one side of the inner wall of the cold water chamber 31. The water level sensor 43 is used to monitor the water level in the cold water chamber 31. The installation position of the water level sensor 43 can be designed according to needs and can be located within the height range of the cooling coil 41. The cooling coil 41 is coiled into a rectangle in the cold water chamber 31 to increase the contact area between the cooling coil 41 and the cooling water, thereby improving the cooling effect.

[0031] A refrigeration structure 5 is provided on the other side of the cooling box 3. The refrigeration structure 5 includes a temperature conducting block 51 fixedly connected to the inner wall of the refrigeration chamber 32 near the cold water chamber 31. A semiconductor refrigeration sheet 52 is fixedly connected to one side of the temperature conducting block 51. The other side of the temperature conducting block 51 penetrates into the cold water chamber 31. A plurality of heat sinks 53 are fixedly connected to one side of the semiconductor refrigeration sheet 52. A through hole 2 is provided on the side of the cooling box 3 away from the oil tank 1. A heat dissipation fan 54 is fixedly installed in the through hole 2. The inner wall of the through hole 2 is away from the heat sink 53. A dustproof net 55 is fixedly installed on one side of 3. When the temperature of the cooling water in the cold water chamber 31 increases during use, the temperature conducting block 51 absorbs the heat of the cooling water in the cold water chamber 31 and transfers it to the other side. By starting the semiconductor refrigeration sheet 52, the temperature of the temperature conducting block 51 can be continuously cooled. Then, the heat dissipation sheet 53 is used to dissipate the heat of the hot surface of the semiconductor refrigeration sheet 52. At the same time, the heat dissipation fan 54 is used to cool down the water in the cold water chamber 31 continuously, thereby achieving the effect of facilitating heat dissipation.

[0032] During the specific implementation of the utility model, when the oil-immersed transformer generates heat and forms high temperature during operation, the heat sink 22 absorbs the heat in the oil tank 1 and dissipates it in a short time, the heat dissipation fan 23 is started, the air circulation in the protective shell 21 is increased, and the hot air is quickly dissipated to the outside of the protective shell 21, and the low temperature constant temperature state in the protective shell 21 is maintained. At the same time, the oil pump 42 can be started to suck the transformer oil in the oil tank 1 into the cooling coil 41, and the transformer oil is cooled by the cooling water in the cold water chamber 31. The rectangular disc structure of the cooling coil 41 improves the heat dissipation of the cooling coil 41. The contact area of ​​the cooling water is reduced, and the cooled transformer oil returns to the oil tank 1. In this process, the temperature conducting block 51 absorbs the heat of the cooling water with the increased temperature inside the cold water chamber 31 and transfers it to the other side, and the semiconductor refrigeration plate 52 is started to continuously cool the temperature of the temperature conducting block 51. After that, the hot surface of the semiconductor refrigeration plate 52 is dissipated through the heat sink 53, and the heat dissipation fan 54 is started to cool down the temperature. The water inside the cold water chamber 31 can be continuously cooled. Through continuous circulation, the transformer oil is continuously cooled, thereby achieving the effect of facilitating heat dissipation and improving the heat dissipation efficiency of the transformer.

[0033] The electrical components appearing in this article are all connected to the external main controller and 220V AC power, and the main controller can be a conventional known device that plays a control role such as a computer, and the temperature sensor and water level sensor are existing products on the market. Their connection methods and control methods are all existing technologies and will not be elaborated here. The specific implementation method of the present disclosure omits the detailed description of known functions and known components. To ensure the compatibility of the equipment, the operating methods used are consistent with the parameters of marketed instruments.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil-immersed transformer, characterized in that: include: An oil tank (1), wherein an oil pillow (6) is provided on one side of the top of the oil tank (1); An air-cooled heat dissipation structure (2), the air-cooled heat dissipation structure (2) being arranged at the front and rear ends of the oil tank (1), the air-cooled heat dissipation structure (2) comprising a protective shell (21) fixedly mounted at the front and rear ends of the oil tank (1), a plurality of heat sinks (22) being fixedly mounted on the outer walls of the front and rear ends of the oil tank (1), the heat sinks (22) being arranged inside the protective shell (21), a through hole (1) being provided on a side of the protective shell (21) away from the oil tank (1), a heat dissipation fan (23) being fixedly mounted in the through hole (1), and a dust screen (24) being fixedly mounted on a side of the inner wall of the through hole (1) away from the heat sink (22); A cooling box (3), the cooling box (3) being arranged on the other side of the oil tank (1), the cooling box (3) being provided with a cold water chamber (31) on the side close to the oil tank (1), and a refrigeration chamber (32) being provided inside the cooling box (3) on the side away from the oil tank (1); A water-cooled heat dissipation structure (4), the water-cooled heat dissipation structure (4) being arranged on one side of the interior of the cooling box (3), the water-cooled heat dissipation structure (4) comprising a cooling coil (41) arranged in the cold water cavity (31), the two ends of the cooling coil (41) being respectively connected to the upper and lower parts of the inner cavity of the oil tank (1), an oil pump (42) being installed on the lower part of the cooling coil (41), and a water level sensor (43) being fixedly installed on one side of the inner wall of the cold water cavity (31); A refrigeration structure (5), wherein the refrigeration structure (5) is arranged on the other side of the cooling box (3), and the refrigeration structure (5) comprises a temperature conducting block (51) fixedly connected to the inner wall of the refrigeration chamber (32) close to the cold water chamber (31), one side of the temperature conducting block (51) is fixedly connected to a semiconductor refrigeration plate (52), and the other side of the temperature conducting block (51) penetrates into the cold water chamber (31), one side of the semiconductor refrigeration plate (52) is fixedly connected to a plurality of heat sinks (53), a through hole (2) is provided on the side of the cooling box (3) away from the oil tank (1), a heat dissipation fan (54) is fixedly installed in the through hole (2), and a dust screen (55) is fixedly installed on the side of the inner wall of the through hole (2) away from the heat sink (53).

2. The oil-immersed transformer according to claim 1, characterized in that: The oil pillow (6) is fixedly connected with a connecting pipe, and the connecting pipe extends into the oil tank (1).

3. The oil-immersed transformer according to claim 1, characterized in that: A water inlet pipe is fixedly connected to the rear end of the top of the cold water chamber (31), and a sealing cover is threadedly connected to the water inlet pipe.

4. The oil-immersed transformer according to claim 1, characterized in that: The top rear side of the oil tank (1) is provided with evenly distributed high-voltage outlet terminals (7), and the top front side of the oil tank (1) is provided with evenly distributed low-voltage outlet terminals (8).

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