Power transformer oil temperature cooling device

Abstract

The utility model discloses an oil temperature cooling device for a power transformer, relates to the field of power transformers, and aims to solve the problems that heat is absorbed by transformer oil in the operation process of an existing power transformer, so that the temperature of the transformer oil rises rapidly, the power transformer is not provided with a cooling structure, and the temperature of the transformer oil cannot be cooled. According to the technical scheme, the transformer oil tank is characterized in that a cooling water tank is arranged below the transformer oil tank shell, a water inlet valve and a water outlet valve are arranged on one side of the cooling water tank, and a corrugated heat exchange pipe is arranged in the cooling water tank; the one-way valve is arranged at the lower end of the transformer oil tank shell, a circulating pump and an oil filtering tank are arranged on one side of the cooling water tank, and oil inlet pipes are arranged among one end of the corrugated heat exchange pipe, the circulating pump, the oil filtering tank and the one-way valve. And normal use of the power transformer is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power transformers, in particular to an oil temperature cooling device for power transformers. Background Art

[0002] A power transformer is a static electrical device that is used to convert a certain value of AC voltage into another or several different values ​​of voltage with the same frequency. The power transformer is one of the main equipment in power plants and substations. Transformer oil is a fractionation product of petroleum. Its main components are compounds such as alkanes, cycloalkanes, and aromatic unsaturated hydrocarbons. Transformer oil has a much higher insulation strength than air. Insulating materials immersed in oil can not only improve insulation strength, but also be protected from moisture erosion; transformer oil has a large specific heat and is often used as a coolant. The heat generated when the transformer is running causes the oil near the core and winding to expand and rise due to heat. Through the up and down convection of the oil, the heat is dissipated through the radiator to ensure the normal operation of the transformer.

[0003] After searching, in the prior art, the publication number CN215417777U discloses a large-scale power transformer cooling device, including a shell, a chassis, a cooling tube body, a semiconductor refrigerant, a cooling box, a transformer and a high-voltage bushing, the lower surface of the shell is welded with a base, and the lower surface of the base is welded with a support rod, the outer end face of one side of the shell is welded with an oil tank, and the inside of the shell is embedded and fixed with a transformer, the upper surface of the shell is welded with a fixing plate, and the upper surface of the fixing plate is fixed with a high-voltage bushing, the cooling box is embedded and fixed between the shell and the transformer, and the cooling tube body is embedded and fixed inside the cooling box, the inner wall of the cooling tube body is embedded and fixed with a semiconductor refrigerant, the rear surface of the cooling tube body is connected with a water inlet pipe that runs through the cooling box and the shell, and the outer surface of the water inlet pipe is threadedly connected with a first valve, the chassis is welded to the outer end face of one side of the transformer, and the inner wall of the transformer is rotatably connected with a fan. The utility model has a better cooling effect.

[0004] However, the device and the prior art still have the following defects: the heat generated by the operation of the existing power transformer is absorbed by the transformer oil, causing the transformer oil temperature to rise. The power transformer has no cooling structure and cannot cool the transformer oil temperature. The excessively high transformer oil temperature affects the use of the power transformer, reduces the service life of the power transformer, and cannot meet the use requirements. Utility Model Content

[0005] The utility model aims to provide an oil temperature cooling device for a power transformer.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil temperature cooling device for a power transformer, comprising a transformer oil tank housing, a cooling water tank is arranged below the transformer oil tank housing, and the cooling water tank is fixedly connected to the transformer oil tank housing, a water inlet valve and a water outlet valve are arranged on one side of the cooling water tank, and the water inlet valve and the water outlet valve are connected to the cooling water tank as a whole, a corrugated heat exchange tube is arranged inside the cooling water tank, and the corrugated heat exchange tube is connected to the cooling water tank as a whole;

[0007] A one-way valve is arranged at the lower end of the transformer oil tank shell, two one-way valves are provided, and the one-way valve is connected to the transformer oil tank shell as a whole, a circulating pump and an oil filter box are provided on one side of the cooling water tank, and the circulating pump and the oil filter box are connected to the cooling water tank by screws, an oil inlet pipe is provided between one end of the corrugated heat exchange tube, the circulating pump, the oil filter box and the one-way valve, and one end of the corrugated heat exchange tube, the circulating pump, the oil filter box and the one-way valve are connected by an oil inlet pipe, and an oil outlet pipe is provided between the other end of the corrugated heat exchange tube and the one-way valve.

[0008] By adopting the above technical solution, the one-way valve is opened and the circulation pump is turned on. Under the action of the circulation pump, the oil inlet pipe first flows into the oil filter box and then into the corrugated heat exchange tube. Cold water is injected into the cooling water tank from the water inlet valve and then flows out from the water outlet valve. The cold water wraps the corrugated heat exchange tube, and the hot oil flows in the corrugated heat exchange tube. The heat of the hot oil is absorbed by the cold water, thereby realizing oil temperature cooling. The cooled transformer oil is then injected into the transformer oil tank along the oil outlet pipe to be mixed with the original oil for use.

[0009] Furthermore, an oil inlet is provided at the upper end of the oil filter box, an oil outlet is provided at one end of the oil filter box, a slag discharge piston is provided at the lower end of the oil filter box, and the slag discharge piston is threadedly connected to the oil filter box, an oil filter plate is provided inside the oil filter box, and the oil filter plate is connected to the oil filter box as a whole.

[0010] By adopting the above technical scheme, the oil inlet allows the transformer oil to flow into the oil filter box, the oil outlet discharges the filtered transformer oil, the oil filter plate filters the transformer oil drawn into the oil filter box, removes the mixed impurities in the transformer oil, and improves the use effect of the transformer oil. The slag discharge piston is removed to clean and remove the oil residue filtered out of the oil filter box.

[0011] Furthermore, a heat sink is disposed outside the transformer oil tank housing, at least sixteen heat sinks are disposed, and the heat sink and the transformer oil tank housing are integrated, and the heat sinks are equidistantly disposed outside the transformer oil tank housing.

[0012] By adopting the above technical solution, the heat sink increases the contact area on the outside of the transformer oil tank shell, better exchanges heat with the air, and the heat sink accelerates the heat loss on the outer surface of the transformer oil tank shell, improves the heat dissipation of the transformer oil tank shell, and indirectly cools the transformer oil.

[0013] Furthermore, a first temperature sensor is provided on one side of the transformer oil tank housing, and the first temperature sensor is connected to the transformer oil tank housing as a whole.

[0014] By adopting the above technical solution, the first temperature sensor measures the temperature of the transformer oil in the transformer oil tank to control the operating temperature of the transformer oil.

[0015] Furthermore, a second temperature sensor is provided on one side of the cooling water tank, and the second temperature sensor is connected to the cooling water tank as a whole.

[0016] By adopting the above technical solution, the second temperature sensor measures the water temperature in the cooling water tank, controls the water cooling temperature, and facilitates the control of the temperature and speed of injection into the cooling water tank, so as to better cool the transformer oil.

[0017] Furthermore, a mounting foot is provided below the cooling water tank, two mounting feet are provided, and the mounting foot is welded to the cooling water tank as a whole, and the two mounting feet are provided at both ends of the cooling water tank.

[0018] By adopting the above technical solution, the transformer is installed and fixed by means of the mounting feet.

[0019] In summary, the beneficial technical effects of the utility model are:

[0020] 1. The heat sink, cooling water tank, water inlet valve, water outlet valve, circulating pump, oil inlet pipe, oil outlet pipe and corrugated heat exchange pipe are set. The heat sink increases the contact area on the outside of the transformer oil tank shell to better exchange heat with the air. The heat sink accelerates the heat loss of the outer surface of the transformer oil tank shell and improves the heat dissipation of the transformer oil tank shell. The circulating pump extracts the hot transformer oil in the transformer oil tank and injects it into the corrugated heat exchange pipe through the oil inlet pipe. The cold water is injected into the cooling water tank through the water inlet valve. The water in the cooling water tank is discharged by the water outlet valve. The cold water wraps the corrugated heat exchange pipe. The hot oil flows in the corrugated heat exchange pipe and absorbs the heat of the hot oil with the help of cold water to reduce the temperature of the transformer oil. The cooled transformer oil is then injected into the transformer oil tank along the oil outlet pipe and mixed with the original oil to achieve oil temperature cooling.

[0021] 2. An oil filter box, an oil filter plate and a slag discharge piston are used. The transformer oil flows into the oil filter box. The oil filter plate filters the transformer oil flowing into the oil filter box to remove impurities in the transformer oil and improve the purity of the transformer oil. The slag discharge piston is removed to clean and remove the oil residue filtered out of the oil filter box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 It is the rear view of the utility model;

[0025] Figure 3 This is a cross-sectional view of the connection between the heat sink and the transformer oil tank shell of the utility model;

[0026] Figure 4 This is the practical cooling structure diagram;

[0027] Figure 5 It is a cross-sectional view of the practical oil filter box.

[0028] In the figure, 1. transformer oil tank shell; 2. heat sink; 3. first temperature sensor; 4. cooling water tank; 5. mounting foot; 6. second temperature sensor; 7. water inlet valve; 8. water outlet valve; 9. circulating pump; 10. oil filter box; 11. oil inlet pipe; 12. one-way valve; 13. oil outlet pipe; 14. corrugated heat exchange tube; 15. oil filter plate; 16. oil inlet; 17. oil outlet; 18. slag discharge piston. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] 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.

[0031] See also Figure 1-5 The utility model provides a technical solution: an oil temperature cooling device for a power transformer, comprising a transformer oil tank housing 1, a cooling water tank 4 is arranged below the transformer oil tank housing 1, and the cooling water tank 4 is fixedly connected to the transformer oil tank housing 1, a water inlet valve 7 and a water outlet valve 8 are arranged on one side of the cooling water tank 4, and the water inlet valve 7 and the water outlet valve 8 are connected to the cooling water tank 4 as a whole, a corrugated heat exchange tube 14 is arranged inside the cooling water tank 4, and the corrugated heat exchange tube 14 is connected to the cooling water tank 4 as a whole;

[0032] A one-way valve 12 is arranged at the lower end of the transformer oil tank housing 1. Two one-way valves 12 are arranged, and the one-way valve 12 is connected to the transformer oil tank housing 1 as a whole. A circulating pump 9 and an oil filter box 10 are arranged on one side of the cooling water tank 4, and the circulating pump 9 and the oil filter box 10 are connected to the cooling water tank 4 by screws. An oil inlet pipe 11 is arranged between one end of the corrugated heat exchange tube 14, the circulating pump 9, the oil filter box 10 and the one-way valve 12, and one end of the corrugated heat exchange tube 14, the circulating pump 9, the oil filter box 10 and the one-way valve 12 are connected by the oil inlet pipe 11. An oil outlet pipe 13 is provided between the other end of the tube 14 and the one-way valve 12. The one-way valve 12 is opened and the circulating pump 9 is turned on. Under the action of the circulating pump 9, the oil inlet pipe 11 first flows into the oil filter box 10, and then is injected into the corrugated heat exchange tube 14. Cold water is injected into the cooling water tank 4 from the water inlet valve 7, and then flows out from the water outlet valve 8. The cold water wraps the corrugated heat exchange tube 14, and the hot oil flows in the corrugated heat exchange tube 14. The heat of the hot oil is absorbed by the cold water, thereby realizing oil temperature cooling. The cooled transformer oil is then injected into the transformer oil tank along the oil outlet pipe 13 to be mixed with the original oil for use.

[0033] See also Figure 2 , Figure 4 and Figure 5 An oil inlet 16 is provided at the upper end of the oil filter box 10, an oil outlet 17 is provided at one end of the oil filter box 10, a slag discharge piston 18 is provided at the lower end of the oil filter box 10, and the slag discharge piston 18 is threadedly connected to the oil filter box 10, an oil filter plate 15 is provided inside the oil filter box 10, and the oil filter plate 15 is connected to the oil filter box 10 as a whole, the oil filter plate 15 filters the transformer oil drawn into the oil filter box 10, removes impurities mixed in the transformer oil, and improves the use effect of the transformer oil.

[0034] See also Figure 1 and Figure 3 A heat sink 2 is arranged outside the transformer oil tank shell 1. There are at least sixteen heat sinks 2, and the heat sink 2 and the transformer oil tank shell 1 are arranged as one body. The heat sink 2 is arranged equidistantly outside the transformer oil tank shell 1. The heat sink 2 accelerates the heat loss of the outer surface of the transformer oil tank shell 1, improves the heat dissipation of the transformer oil tank shell 1, and indirectly cools the transformer oil.

[0035] See also Figure 1 and Figure 3 A first temperature sensor 3 is provided on one side of the transformer oil tank housing 1, and the first temperature sensor 3 is connected to the transformer oil tank housing 1 as a whole. The first temperature sensor 3 measures the temperature of the transformer oil in the transformer oil tank.

[0036] See also Figure 1 and Figure 4A second temperature sensor 6 is provided on one side of the cooling water tank 4, and the second temperature sensor 6 is connected to the cooling water tank 4 as a whole. The second temperature sensor 6 measures the water temperature in the cooling water tank 4 to control the water cooling temperature.

[0037] See also Figure 1 A mounting foot 5 is provided below the cooling water tank 4. Two mounting feet 5 are provided, and the mounting foot 5 is welded as a whole with the cooling water tank 4. The two mounting feet 5 are provided at both ends of the cooling water tank 4, and the transformer is installed and fixed with the help of the mounting feet 5.

[0038] Working principle: open the one-way valve 12 and start the circulation pump 9. Under the action of the circulation pump 9, the oil inlet pipe 11 first flows into the oil filter box 10. The oil filter plate 15 filters the transformer oil drawn into the oil filter box 10, removes the impurities mixed in the transformer oil, and then injects it into the corrugated heat exchange tube 14 along the oil inlet pipe 11; inject cold water into the cooling water tank 4 from the water inlet valve 7, and then flows out from the water outlet valve 8. The cold water wraps the corrugated heat exchange tube 14, and the hot oil flows in the corrugated heat exchange tube 14, and absorbs the heat of the hot oil with the help of the cold water, thereby The oil temperature is cooled, and the cooled transformer oil is then injected into the transformer oil tank along the oil outlet pipe 13 to be mixed with the original oil for use; the heat sink 2 accelerates the heat loss of the outer surface of the transformer oil tank shell 1, improves the heat dissipation of the transformer oil tank shell 1, and indirectly cools the transformer oil, removes the slag discharge piston 18 to clean and remove the oil residue filtered out of the oil filter box 10, the first temperature sensor 3 measures the oil temperature of the transformer oil in the transformer oil tank, and the second temperature sensor 6 measures the water temperature in the cooling water tank 4 to control the water cooling temperature.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A power transformer oil temperature cooling device, comprising a transformer oil tank housing (1), characterized in that: A cooling water tank (4) is arranged below the transformer oil tank housing (1), and the cooling water tank (4) is fixedly connected to the transformer oil tank housing (1); a water inlet valve (7) and a water outlet valve (8) are arranged on one side of the cooling water tank (4), and the water inlet valve (7) and the water outlet valve (8) are integrally connected to the cooling water tank (4); a corrugated heat exchange tube (14) is arranged inside the cooling water tank (4), and the corrugated heat exchange tube (14) is integrally connected to the cooling water tank (4); A one-way valve (12) is arranged at the lower end of the transformer oil tank housing (1), two one-way valves (12) are arranged, and the one-way valves (12) are connected to the transformer oil tank housing (1) as a whole. A circulating pump (9) and an oil filter box (10) are arranged on one side of the cooling water tank (4), and the circulating pump (9) and the oil filter box (10) are connected to the cooling water tank (4) by screws. An oil inlet pipe (11) is arranged between one end of the corrugated heat exchange tube (14), the circulating pump (9), the oil filter box (10) and the one-way valve (12), and one end of the corrugated heat exchange tube (14), the circulating pump (9), the oil filter box (10) and the one-way valve (12) are connected by the oil inlet pipe (11), and an oil outlet pipe (13) is arranged between the other end of the corrugated heat exchange tube (14) and the one-way valve (12).

2. The oil temperature cooling device for power transformer according to claim 1 is characterized in that: The upper end of the oil filter box (10) is provided with an oil inlet (16), one end of the oil filter box (10) is provided with an oil outlet (17), the lower end of the oil filter box (10) is provided with a slag discharge piston (18), and the slag discharge piston (18) is threadedly connected to the oil filter box (10), and the interior of the oil filter box (10) is provided with an oil filter plate (15), and the oil filter plate (15) and the oil filter box (10) are connected as a whole.

3. The oil temperature cooling device for power transformer according to claim 1 is characterized in that: The transformer oil tank housing (1) is provided with heat sinks (2) on the outside, at least sixteen heat sinks (2) are provided, and the heat sinks (2) and the transformer oil tank housing (1) are provided as a whole, and the heat sinks (2) are provided at equal intervals on the outside of the transformer oil tank housing (1).

4. The oil temperature cooling device for power transformer according to claim 2 is characterized in that: A first temperature sensor (3) is provided on one side of the transformer oil tank housing (1), and the first temperature sensor (3) is integrally connected to the transformer oil tank housing (1).

5. The oil temperature cooling device for power transformer according to claim 2 is characterized in that: A second temperature sensor (6) is provided on one side of the cooling water tank (4), and the second temperature sensor (6) is integrally connected to the cooling water tank (4).

6. The oil temperature cooling device for power transformer according to claim 1 is characterized in that: A mounting foot (5) is provided below the cooling water tank (4), two mounting feet (5) are provided, and the mounting foot (5) and the cooling water tank (4) are welded together as one, and the two mounting feet (5) are provided at both ends of the cooling water tank (4).

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