A circulating oil temperature lowering device for transformer with flow guide plate

Abstract

The utility model discloses a guide vane circulating oil temperature falling device for transformer belongs to transformer technical field. The device aims at solving the problem of slow heat dissipation and uneven oil temperature of the existing transformer caused by the disorderly flow of oil. Its technical scheme comprises: a transformer oil tank, which is provided with a fin on the outer wall; and a guide vane, which is installed inside the transformer oil tank and is arranged adjacent to the fin. The guide vane builds a preset oil circulation channel between the heat source and the fin in the transformer oil tank, guides the heated oil rising to flow through the fin for heat exchange, and then returns to the heat source after cooling. The utility model establishes forced oil circulation, significantly improves the heat dissipation efficiency, makes the oil temperature in the transformer uniform, and improves the stability of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a flow guide plate circulating oil cooling device for transformers. Background Technology

[0002] High-frequency power supplies are crucial equipment in electrostatic precipitators, and step-up transformers are the core components of these power supplies. During the process of removing dust from boiler flue gas, the transformer needs to operate for extended periods under high frequency, high voltage, and high power conditions. This generates a significant amount of heat, causing a rapid increase in the temperature of its internal insulating oil. Excessive oil temperature not only accelerates the aging of the insulation materials but may also limit the overall performance and lifespan of the transformer, making it unable to meet the increasingly stringent environmental emission standards imposed on the equipment.

[0003] In existing transformers, the insulating oil lacks a pre-designed, fixed circulation channel. Heat dissipation primarily relies on natural heat transfer from the oil, meaning the oil temperature near heat sources such as the core and windings is significantly higher than the oil temperature in the lower part of the tank and at the heat sinks, resulting in severe uneven heating. This passive cooling method is inefficient and cannot quickly and effectively remove core heat, thus becoming a bottleneck restricting transformer performance improvement. Therefore, optimizing the oil circulation inside the transformer to improve heat dissipation efficiency is a pressing technical problem that needs to be solved. Utility Model Content

[0004] This utility model provides a circulating oil temperature reduction device for a transformer guide plate to solve the problems mentioned in the background art. The device includes:

[0005] A transformer oil tank contains transformer oil and is equipped with an iron core and windings that serve as a heat source.

[0006] Heat sinks are installed on the outer wall of the transformer tank to dissipate heat;

[0007] A flow guide plate, characterized in that the flow guide plate is installed inside the transformer oil tank and is disposed adjacent to the heat sink;

[0008] The guide plate inside the transformer oil tank creates a pre-set oil circulation channel between the heat source and the heat sink, guiding the heated oil to flow through the heat sink for heat exchange, and then flowing back to the heat source after cooling.

[0009] Furthermore, the guide plate is integrally formed by a baffle and a guide strip.

[0010] Furthermore, the baffle is a flat plate structure, and its main function is to block the oil from the heat source and force it to change its flow direction.

[0011] Furthermore, the heat sink is provided with an internal oil gap for oil flow, and the guide strip is a plurality of strip-shaped structures inserted into the oil gap of the heat sink.

[0012] Furthermore, the guide plate is fixed to the inner wall of the transformer tank or its internal structure by fasteners.

[0013] Furthermore, the fasteners are screws and nuts.

[0014] Furthermore, it also includes an air-cooling device, which is disposed outside the heat sink and generates airflow to force-cool the heat sink to accelerate heat dissipation.

[0015] Furthermore, the air-cooling device is a fan, and its airflow direction is set to draw air into the heat sink.

[0016] Furthermore, heat sinks are provided on the three outer walls of the transformer tank, and guide plates are installed at corresponding positions inside them, thereby forming three independent oil circulation channels.

[0017] Furthermore, the heat sinks on the three outer walls are all equipped with air-cooling devices.

[0018] Beneficial effects:

[0019] This invention creates a pre-defined, fixed oil circulation channel inside the transformer by setting a guide plate. Specifically, the baffle structure on the guide plate blocks the hot oil rising from the heat source and forces it to change its flow direction, entering the path defined by the guide plate. This structure ensures that the hot oil can be directed and concentrated to the heat sink area, thereby achieving efficient heat exchange.

[0020] This invention achieves rapid cooling of oil through the combination of an air-cooling device and heat sinks. As hot oil flows through the heat sink under the guidance of a guide plate, an external air-cooling device (such as a fan) draws air into the heat sink, creating forced convection and rapidly removing heat from the heat sink. The cooled oil, due to its increased density, sinks and flows back to the heat source via the guide plate, completing one cycle. This combination of "guided cooling + forced air cooling" significantly improves the cooling rate compared to simple natural heat transfer.

[0021] The device provided by this invention can equalize the overall oil temperature inside a transformer. Through the forced circulation path established by the guide plate, the hot oil in the upper part of the transformer tank and the cold oil in the lower part are continuously and thoroughly mixed and exchanged for heat. This effectively solves the problem of excessively high local oil temperature and uneven heating caused by insufficient circulation, making the oil temperature throughout the transformer more uniform and contributing to improved equipment operational stability. Furthermore, the guide plate can be installed inside the transformer tank with fasteners, making its structure simple and easy to implement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the device structure;

[0024] Figure 2 This is a schematic diagram of the internal structure of the device;

[0025] Figure 3 for Figure 2 Schematic diagram of direction C;

[0026] Figure 4 for Figure 2 Top view;

[0027] Figure 5 for Figure 4 BB section view;

[0028] Figure 6 This is a schematic diagram of the guide vane structure;

[0029] Figure 7 for Figure 6 Front view;

[0030] Figure 8 for Figure 6 Top view;

[0031] In the picture:

[0032] Transformer oil tank-1, heat sink-2, oil gap-21, flow guide plate-3, baffle-31, flow guide strip-32, fastener-4. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0034] Example 1:

[0035] To make the objectives, technical solutions and advantages of this utility model clearer, a preferred embodiment of this utility model will be described in detail below with reference to the accompanying drawings, but this utility model is not limited to this embodiment.

[0036] like Figure 1-5 As shown in the figure, this embodiment discloses a flow guide plate circulating oil cooling device for transformers. This device is mainly used in high-frequency, high-power special transformers, aiming to solve the problems of excessively high oil temperature and uneven heat dissipation caused by the large amount of heat generated during long-term operation.

[0037] The foundation of this device is the transformer body, which includes a transformer tank 1 containing insulating transformer oil and housing the core and windings (not shown in the figure) that serve as the core heat source. During transformer operation, these core components generate a large amount of heat. On the outer wall of the transformer tank 1, a plurality of hollow heat sinks 2 are welded. Each heat sink 2 has a structure with numerous horizontal or vertical grilles / louvers. The grille / louver intervals have oil gaps 21 for transformer oil flow, and their outer surfaces are in contact with air to dissipate heat.

[0038] The core innovation of this embodiment lies in the addition of a deflector plate 3. For example... Figure 6-8 As shown, the guide plate 3 is installed inside the transformer tank 1, adjacent to the heat sink 2. This arrangement can be applied to all three sides of the transformer tank. In this embodiment, the guide plate 3 is securely installed on the inner wall of the transformer tank 1 or its internal support structure using fasteners 4, such as four screws and nuts. The installation position is centered in the vertical direction of the tank.

[0039] Specifically, the guide plate 3 is an integrated structure, consisting of two parts: a baffle 31 and guide strips 32. The baffle 31 is a single flat plate, wide enough to cover the main area where hot oil rises inside the transformer. The guide strips 32 are multiple parallel strip-shaped structures extending from the edge of the baffle 31, and their size and spacing match the internal oil gap 21 of the heat sink 2. During installation, the guide strips 32 are precisely inserted into the oil gap 21.

[0040] The device operates as follows:

[0041] After the transformer is energized, the transformer oil near heat sources such as the core and windings is rapidly heated. Its temperature rises and its density decreases, generating buoyancy and causing it to rise naturally. For example... Figure 2 In the direction of the arrow, when the hot oil flow rises to the height of the guide plate 3, due to the presence of the baffle 31 and the guide strip 32, the hot oil cannot continue to diffuse directly upwards. Instead, it is forced to change direction and can only converge and flow to the only outlet, namely the channel defined by the guide strip 32 leading to the oil gap 21 inside the heat sink 2.

[0042] To significantly improve heat dissipation efficiency, this device also includes an external air-cooling unit on the heat sink 2. This air-cooling unit can be one or more high-power fans, which are installed directly opposite the external heat dissipation gaps of the heat sink 2, and their airflow direction is set to powerfully draw air into the heat sink 2.

[0043] As the hot oil, guided by the guide plate 3, flows through the internal oil gap 21 of the heat sink 2, the external air-cooling device 5 operates simultaneously, generating a high-speed forced convection airflow that rapidly and continuously carries away the heat accumulated on the surface of the heat sink 2. After flowing through this forced-cooling area, the hot oil's temperature drops significantly, its density increases, and it naturally sinks under gravity. The sinking cold oil flows back along the bottom of the guide plate 3 to the bottom of the transformer tank 1, i.e., the heat source area, ready to absorb new heat, thus completing a complete and efficient forced convection cooling cycle.

[0044] In a preferred embodiment, to maximize heat dissipation, heat sinks 2 can be installed on three outer walls of the transformer tank 1, and independent guide plates 3 can be installed at corresponding positions inside each tank. This creates three parallel, efficient oil circulation and heat dissipation channels inside the transformer, allowing the oil inside the tank to circulate and mix fully and quickly. This completely solves the problem of uneven oil temperature in traditional transformers, ensuring the uniformity and stability of oil temperature throughout the transformer.

Claims

1. A circulating oil temperature reduction device for a transformer using a guide plate, characterized in that, include: The transformer oil tank (1) contains transformer oil and is equipped with an iron core and windings as a heat source. Heat sink (2) is installed on the outer wall of the transformer tank (1) to dissipate heat; A flow guide plate (3) is installed inside the transformer tank (1) and is located adjacent to the heat sink (2); The guide plate (3) in the transformer oil tank (1) forms a preset oil circulation channel between the heat source and the heat sink (2), guiding the heated oil to flow through the heat sink (2) for heat exchange, and then flowing back to the heat source after cooling.

2. The apparatus according to claim 1, characterized in that, The guide plate (3) is integrally formed by a baffle (31) and a guide strip (32).

3. The apparatus according to claim 2, characterized in that, The baffle (31) is a flat plate structure used to block oil from the heat source and force it to change its flow direction.

4. The apparatus according to claim 2, characterized in that, The heat sink (2) is provided with an internal oil gap (21) for oil flow, and the guide strip (32) is a plurality of strip-shaped structures and is inserted into the oil gap (21) of the heat sink (2).

5. The apparatus according to claim 1, characterized in that, The guide plate (3) is fixed to the inner wall or internal structure of the transformer tank (1) by fasteners (4).

6. The apparatus according to claim 5, characterized in that, The fasteners (4) are screws and nuts.

7. The apparatus according to claim 1, characterized in that, It also includes an air-cooling device, which is located outside the heat sink (2) and generates airflow to force-cool the heat sink (2) to accelerate heat dissipation.

8. The apparatus according to claim 7, characterized in that, The air-cooling device is a fan, and its airflow direction is set to draw air into the heat sink (2).

9. The apparatus according to claim 1, characterized in that, The heat sink (2) is provided on the three outer walls of the transformer oil tank (1), and the guide plate (3) is installed in the corresponding position inside, thereby forming three independent oil circulation channels.

10. The apparatus according to claim 9, characterized in that, The heat sinks (2) on the three outer walls are all equipped with air-cooling devices.

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