Temperature control oil change type transformer oil tank

Abstract

The utility model discloses a temperature control oil change type transformer oil tank which comprises a transformer oil tank body. The transformer oil tank cooling device has the advantages that the first oil passing tank, the spiral cold guide oil pipe, the second oil passing tank and the electric heating rod are arranged, so that when transformer oil needs to be cooled, cooling liquid is continuously introduced into the first oil passing tank, the cooling effect is achieved, the cooling effect is good, and the cooling effect is good. Cooling liquid in the first oil passing box is used for cooling oil passing through the spiral cold guide oil pipe, when transformer oil needs to be heated, all electric heating rods in the second oil passing box are used for heating the transformer oil passing through the second oil passing box, and a filter screen plate, a rotating rod and an impurity scraping plate are arranged, so that the oil passing through the spiral cold guide oil pipe is cooled; when the output end of the motor drives the rotating rod and the impurity scraping plate to rotate, the impurity scraping plate scrapes impurities filtered out from one side of the filter screen plate, and the filtering effect of the filter screen plate on transformer oil is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of transformer oil tank technology, specifically a temperature-controlled oil-changing transformer oil tank. Background Technology

[0002] The transformer oil tank is the outer shell of an oil-immersed transformer and a container for holding transformer oil and the transformer body. The tank is filled with transformer oil, which forms an insulating layer inside the transformer to prevent accidents such as electric arcing and discharge. It also cools the internal windings and core of the transformer. However, traditional transformer oil tanks have shortcomings in oil temperature control. They do not fully consider the oil temperature regulation requirements, making it difficult to ensure stable operation of the transformer under various operating conditions, and they cannot flexibly adjust the transformer oil temperature according to the actual operating status of the transformer. Utility Model Content

[0003] The purpose of this utility model is to provide a temperature-controlled oil-changing transformer oil tank to solve the problems mentioned in the background art, such as the shortcomings of traditional transformer oil tanks in oil temperature control, the failure to fully consider the oil temperature regulation requirements, the difficulty in ensuring stable operation of the transformer under various operating conditions, and the inability to flexibly adjust the transformer oil temperature according to the actual operating status of the transformer.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a temperature-controlled oil-changing transformer oil tank, comprising:

[0005] Transformer oil tank body;

[0006] Side fixing bracket, which is installed on one side of the transformer tank body;

[0007] The circulating oil pump is mounted on top of the side mounting bracket;

[0008] A connecting oil tank is installed on top of the side fixing frame, and the connecting oil tank and the transformer tank body are connected by a pipe;

[0009] A filter screen is installed inside the connecting oil tank, which is connected to the input end of the circulating oil pump via a pipe.

[0010] The No. 1 oil tank is located on one side of the transformer tank body, and the No. 2 oil tank is fixedly connected to one side of the transformer tank body.

[0011] The three-way connector is connected to the output end of the circulating oil pump through a pipe. A spiral cooling oil pipe is fixed inside the No. 1 oil tank. One end of the three-way connector is connected to the spiral cooling oil pipe through a pipe, and the other end of the three-way connector is connected to the No. 2 oil tank through a pipe. Both the spiral cooling oil pipe and the No. 2 oil tank are connected to the transformer oil tank body through pipes.

[0012] As a preferred embodiment of this utility model: a coolant pipe is symmetrically fixed to one side of the No. 1 oil tank, a side oil tank is fixed to one end of the coolant pipe, a coolant inlet pipe is fixed to one side of the side oil tank, a coolant outlet pipe is fixed to the bottom of the No. 1 oil tank, and multiple electric heating rods are equidistantly installed inside the No. 2 oil tank.

[0013] As a preferred embodiment of this utility model: a rotating rod is rotatably provided on one side of the filter screen plate, and a scraper plate that cooperates with the filter screen plate is fixedly connected to the outer side of the rotating rod. A motor is installed on one side of the oil tank, and the output end of the motor is fixedly connected to the rotating rod.

[0014] As a preferred embodiment of this utility model: a sealing cover is installed above the connecting oil tank, and mounting holes are symmetrically fixed to both sides of the sealing cover. A plurality of fixing screws that cooperate with the mounting holes are fixed to the top of the connecting oil tank, and a limiting nut that cooperates with the fixing screws is provided above the mounting holes.

[0015] As a preferred embodiment of this utility model: an oil inlet pipe is fixedly connected to one side of the transformer oil tank, an oil outlet pipe is fixedly connected to one side of the transformer oil tank, two No. 1 electrically controlled valves are installed on the tee joint, and No. 2 electrically controlled valves are installed on both the oil inlet pipe and the oil outlet pipe.

[0016] As a preferred embodiment of this utility model: a thermocouple is installed inside the transformer oil tank, and polyurethane foam insulation material is provided on the outside of both the No. 1 oil tank and the No. 2 oil tank.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up a No. 1 oil tank, a spiral cooling oil pipe, a No. 2 oil tank, and electric heating rods, this utility model achieves the following: when it is necessary to cool the transformer oil, coolant is continuously introduced into the No. 1 oil tank, and the coolant in the No. 1 oil tank cools the oil passing through the spiral cooling oil pipe. When it is necessary to heat the transformer oil, the electric heating rods in the No. 2 oil tank heat the transformer oil passing through the No. 2 oil tank. By setting up a filter screen, a rotating rod, and a scraper, when the output end of the motor drives the rotating rod and the scraper to rotate, the scraper removes the impurities filtered out by one side of the filter screen, ensuring the filtration effect of the filter screen on the transformer oil. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a rear view of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the No. 1 and No. 2 oil tanks of this utility model;

[0021] Figure 4 This is a schematic diagram of the interconnected oil tank structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the connected fuel tank of this utility model;

[0023] Figure 6 The image shows a bottom view of the No. 1 and No. 2 oil tanks of this utility model.

[0024] In the diagram: 1. Transformer oil tank body; 2. Side fixing frame; 3. No. 1 oil tank; 4. No. 2 oil tank; 5. Oil inlet pipe; 6. Oil outlet pipe; 7. Circulating oil pump; 8. Connecting oil tank; 9. Motor; 10. Rotating rod; 11. Scraper; 12. Filter screen; 13. Sealing cover; 14. Fixing screw; 15. Mounting hole plate; 16. Limit nut; 17. Spiral cooling oil pipe; 18. Side oil tank; 19. Coolant inlet pipe; 20. Coolant inlet pipe; 21. Coolant outlet pipe; 22. Electric heating rod; 23. T-joint; 24. Thermocouple. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1 to 6 This utility model provides a technical solution: a temperature-controlled oil-changing transformer tank, comprising: a transformer tank body 1; a side fixing frame 2 welded and fixed to one side of the transformer tank body 1; a circulating oil pump 7 bolted to the top of the side fixing frame 2; a connecting oil tank 8 bolted to the top of the side fixing frame 2, the connecting oil tank 8 and the transformer tank body 1 connected by a pipe; a filter screen 12 bolted to the inside of the connecting oil tank 8, the connecting oil tank 8 and the input end of the circulating oil pump 7 connected by a pipe; and a first-pass filter. Oil tank 3 is fixed to one side of transformer oil tank body 1 by bolts. No. 2 oil tank 4 is fixed to one side of transformer oil tank body 1 by bolts. T-joint 23 is connected to the output end of circulating oil pump 7 through a pipe. Spiral cooling oil pipe 17 is fixed inside No. 1 oil tank 3. One end of T-joint 23 is connected to spiral cooling oil pipe 17 through a pipe. The other end of T-joint 23 is connected to No. 2 oil tank 4 through a pipe. Spiral cooling oil pipe 17 and No. 2 oil tank 4 are both connected to transformer oil tank body 1 through pipes.

[0027] It should be noted that in this embodiment, the device is centrally controlled by an external controller and powered on. The circulating oil pump 7 draws oil from the transformer oil tank 1, and the transformer oil in the tank enters the connecting tank 8 through a pipeline. Impurities in the transformer oil are filtered by the filter screen 12 in the connecting tank 8. The output of the motor 9 drives the rotating rod 10 and the scraper 11 to rotate, scraping away impurities filtered from one side of the filter screen 12 to prevent adhesion. The sealed cover 13 is periodically opened to clean the scraped impurities. The filtered transformer oil in the connecting tank 8 is then pumped to the three-way connector 23 by the circulating oil pump 7. When cooling of the transformer oil is required, one of the three-way connectors is opened. The transformer oil is fed into the spiral cooling oil pipe 17 via an electrically controlled valve. During transformer operation, a large amount of heat is generated due to losses in the core and winding components. If the transformer oil temperature is too high, it will affect the oil's insulation performance and heat dissipation effect, and may even lead to transformer damage. Therefore, the transformer oil needs to be cooled to maintain its temperature within a reasonable range. Furthermore, under conditions of transformer overload or high ambient temperature, the transformer generates even more heat, causing the transformer oil temperature to rise even faster. In such cases, it is necessary to intensify the cooling of the transformer oil to prevent equipment damage caused by excessively high oil temperature. A coolant supply pipe is connected externally through the coolant inlet pipe 20. The main function of the coolant supply pipe is to provide a stable flow of coolant to the transformer tank. The coolant in the external cooling system is delivered to the cooling section of the transformer oil tank to cool the transformer oil. The coolant enters the side-through oil tank 18 through the coolant inlet pipe 20, enters the No. 1 throughlet oil tank 3 through the coolant throughlet pipe 19 on one side, and is discharged through the coolant outlet pipe 21. The coolant in the No. 1 throughlet oil tank 3 cools the transformer oil flowing in the spiral cooling oil pipe 17, and then enters the transformer oil tank body 1 to circulate and cool the transformer oil in the transformer oil tank body 1. When it is necessary to heat the transformer oil, one of the electrically controlled valves is closed and the other electrically controlled valve is opened. For transformers with voltage levels of 220kV and above, hot oil circulation is required after vacuum injection of transformer oil. The circulation time depends on the voltage level. The specific requirements vary depending on the transformer type. For example, 220kV-330kV transformers must circulate for at least 24 hours, and 500kV transformers for at least 48 hours. This is to ensure that the transformer oil can circulate fully after injection, removing gas and impurities, and improving the oil's insulation and heat dissipation performance. Additionally, in cold seasons or regions, the transformer oil temperature may be too low, leading to increased viscosity and decreased fluidity, affecting heat dissipation and insulation performance. Therefore, heating the transformer oil is necessary to increase its temperature and fluidity. The transformer oil enters the No. 2 oil tank 4, where it is heated by various electric heating rods 22. After heating, it enters the transformer oil tank 1, where the transformer oil undergoes further circulation and heating.The oil temperature inside the transformer oil tank 1 is monitored by thermocouple 24. Oil is injected into the transformer oil tank 1 through oil inlet pipe 5 and drained from the transformer oil tank 1 through oil outlet pipe 6, thus completing the replacement of the transformer oil in the transformer oil tank 1.

[0028] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, a coolant pipe 19 is symmetrically fixed to one side of the No. 1 oil tank 3, a side oil tank 18 is fixed to one end of the coolant pipe 19, a coolant inlet pipe 20 is fixed to one side of the side oil tank 18, a coolant outlet pipe 21 is fixed to the bottom of the No. 1 oil tank 3, and multiple electric heating rods 22 are installed at equal intervals inside the No. 2 oil tank 4.

[0029] It should be noted that in this embodiment, coolant is injected into the side-through oil tank 18 through the coolant inlet pipe 20. The coolant in the side-through oil tank 18 enters the first-through oil tank 3 through the coolant throughlet pipe 19, and is then discharged and collected through the coolant outlet pipe 21. The coolant is used to cool the transformer oil flowing in the spiral cooling oil pipe 17.

[0030] In one embodiment, such as Figures 1 to 5 As shown, a rotating rod 10 is rotatably mounted on one side of the filter screen plate 12, and a scraper plate 11 that cooperates with the filter screen plate 12 is fixedly connected to the outside of the rotating rod 10. A motor 9 is installed on one side of the oil tank 8, and the output end of the motor 9 is fixedly connected to the rotating rod 10.

[0031] It should be noted that in this embodiment, the output end of the motor 9 drives the rotating rod 10 to rotate, and when the rotating rod 10 rotates, it drives the outer scraper 11 to rotate, and the scraper 11 scrapes away the impurities on one side of the filter screen 12.

[0032] In one embodiment, such as Figures 1 to 5 As shown, a sealing cover 13 is installed above the oil tank 8. Mounting plates 15 are symmetrically fixed to both sides of the sealing cover 13. Multiple fixing screws 14 that cooperate with the mounting plates 15 are fixed to the top of the oil tank 8. A limiting nut 16 that cooperates with the fixing screws 14 is provided above the mounting plates 15.

[0033] It should be noted that in this embodiment, the limiting nut 16 is threaded on the outside of the fixing screw 14 and is fixed on the communicating oil tank 8 through the mounting plate 15 and the sealing cover 13.

[0034] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, an oil inlet pipe 5 is fixedly connected to one side of the transformer oil tank 1, and an oil outlet pipe 6 is fixedly connected to one side of the transformer oil tank 1. Two No. 1 electrically controlled valves are installed on the tee joint 23, and No. 2 electrically controlled valves are installed on both the oil inlet pipe 5 and the oil outlet pipe 6.

[0035] It should be noted that in this embodiment, the transformer oil in the transformer oil tank 1 is injected and discharged through the No. 2 electrically controlled valve on the oil inlet pipe 5 and the oil outlet pipe 6.

[0036] In one embodiment, such as Figures 1 to 3 As shown, a thermocouple 24 is installed inside the transformer oil tank 1, and polyurethane foam insulation material is installed on the outside of the No. 1 oil tank 3 and the No. 2 oil tank 4.

[0037] It should be noted that in this embodiment, the transformer oil temperature in the transformer oil tank 1 is detected by thermocouple 24. The outer side of the No. 1 oil tank 3 and the No. 2 oil tank 4 is made of polyurethane foam insulation material to maintain the stability of the internal temperature and prevent the heat from being lost too quickly or the external heat from affecting the inside of the oil tank. The insulation material can effectively block the transfer of heat.

[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Temperature-controlled oil changeable transformer tank, characterized in that, include: Transformer oil tank body (1); Side fixing bracket (2) is set on one side of the transformer tank body (1); The circulating oil pump (7) is mounted on the top of the side fixing bracket (2); A connecting oil tank (8) is installed on the top of the side fixing frame (2), and the connecting oil tank (8) and the transformer tank body (1) are connected by a pipe; The filter screen (12) is installed inside the connecting oil tank (8), which is connected to the input end of the circulating oil pump (7) through a pipe. No. 1 oil tank (3) is located on one side of the transformer tank body (1), and No. 2 oil tank (4) is fixedly connected to one side of the transformer tank body (1). The three-way connector (23) is connected to the output end of the circulating oil pump (7) through a pipe. The first oil tank (3) is fixedly connected to a spiral cooling oil pipe (17). One end of the three-way connector (23) is connected to the spiral cooling oil pipe (17) through a pipe. The other end of the three-way connector (23) is connected to the second oil tank (4) through a pipe. The spiral cooling oil pipe (17) and the second oil tank (4) are both connected to the transformer tank body (1) through a pipe.

2. The temperature controlled drainable transformer tank of claim 1, wherein: A coolant pipe (19) is symmetrically fixed to one side of the No. 1 oil tank (3). A side oil tank (18) is fixed to one end of the coolant pipe (19). A coolant inlet pipe (20) is fixed to one side of the side oil tank (18). A coolant outlet pipe (21) is fixed to the bottom of the No. 1 oil tank (3). Multiple electric heating rods (22) are installed at equal intervals inside the No. 2 oil tank (4).

3. The temperature controlled drainable transformer tank of claim 1, wherein: A rotating rod (10) is rotatably provided on one side of the filter screen plate (12), and a scraper plate (11) that cooperates with the filter screen plate (12) is fixedly connected to the outside of the rotating rod (10). A motor (9) is installed on one side of the oil tank (8), and the output end of the motor (9) is fixedly connected to the rotating rod (10).

4. The temperature controlled drainable transformer tank of claim 1, wherein: A sealing cover (13) is installed above the connecting oil tank (8). Mounting holes (15) are symmetrically fixed on both sides of the sealing cover (13). A plurality of fixing screws (14) that cooperate with the mounting holes (15) are fixed on the top of the connecting oil tank (8). A limiting nut (16) that cooperates with the fixing screws (14) is provided above the mounting holes (15).

5. The temperature controlled drainable transformer tank of claim 1, wherein: An oil inlet pipe (5) is fixedly connected to one side of the transformer oil tank (1), and an oil outlet pipe (6) is fixedly connected to one side of the transformer oil tank (1). Two No. 1 electrically controlled valves are installed on the tee joint (23), and No. 2 electrically controlled valves are installed on both the oil inlet pipe (5) and the oil outlet pipe (6).

6. The temperature controlled drainable transformer tank of claim 1, wherein: Thermocouples (24) are installed inside the transformer tank (1), and polyurethane foam insulation material is installed on the outside of the No. 1 oil tank (3) and the No. 2 oil tank (4).

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