A corrugated heat sink oil tank for a transformer device

Abstract

The utility model discloses a corrugated heat dissipation oil tank of transformer device belongs to transformer heat dissipation technical field, aims at solving the many dead angle of existing device, area is insufficient, the impurity influence efficiency and the local overheating problem. It includes horizontal suspension cylindrical oil tank, and the heat dissipation cavity is formed through the triangular support and the transformer body top connection, and the transformer body is pasted with the V-shaped corrugated fin of equal interval arrangement, and one end of transformer body is communicated with the oil tank through the columnar connecting seat and the metal corrugated pipe, and the filter assembly of metal corrugated pipe series connection with heat dissipation corrugation and netted filter core, and the outer wall is wrapped with the heat conduction silica gel layer, and the oil tank end cover is arc. Through the multiple structure cooperation, realize the overall heat dissipation from the body to the oil circulation to the oil tank, and the heat dissipation efficiency is improved significantly, and the stable operation of transformer is guaranteed.

Description

Technical Field

[0001] This utility model provides a corrugated cooling oil tank, and particularly relates to a corrugated cooling oil tank for a transformer device. Background Technology

[0002] The corrugated cooling oil tank of a transformer is a core component used to store insulating oil and dissipate heat during transformer operation. Its main function is to transfer the heat generated by the transformer core and windings during operation to the outside through its own structural design, maintain the internal temperature of the transformer within a reasonable range, ensure the insulation performance of the insulating oil and the stable operation of the transformer, and is a key component to ensure the long-term safe operation of the transformer.

[0003] In existing technologies, the corrugated cooling oil tank of a transformer is usually fixed directly to the top or side of the transformer body. There is a lack of dedicated heat dissipation space between the oil tank and the transformer body, which easily creates heat dissipation dead zones. Its heat dissipation fins are mostly flat or simple corrugated structures, and the design of the corrugation depth, spacing and shape is unreasonable, resulting in limited heat dissipation area and uneven heat distribution. The pipes connecting the oil tank and the transformer body are mostly rigid straight pipes, which not only have poor thermal conductivity, but also lack filter components. Impurities in the oil can easily adhere to the surface of the pipes and heat dissipation structures, further reducing heat dissipation efficiency. At the same time, the oil tank end cover is mostly a flat structure, which is not conducive to the flow of internal oil and is prone to local overheating. These structural defects make it difficult for existing devices to achieve comprehensive and efficient heat dissipation and cannot meet the heat dissipation requirements of transformers under high load operation. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing transformer corrugated cooling oil tanks, such as numerous heat dissipation dead zones, insufficient heat dissipation area, impurities affecting heat dissipation efficiency, and local overheating, and to provide a corrugated cooling oil tank for transformer devices that can achieve a more comprehensive heat dissipation effect.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: To achieve the above objectives, this utility model provides a corrugated cooling oil tank for a transformer device, comprising a cylindrical oil tank suspended horizontally. The oil tank is fixedly connected to the top of the transformer body via symmetrically distributed triangular supports on both sides, and a heat dissipation cavity is formed between the bottom of the oil tank and the top of the transformer body. The transformer body has a cuboid structure, and several sets of corrugated heat dissipation fins are attached and fixed to its outer surface. The corrugated heat dissipation fins are vertically arranged rectangular plate structures, and their surfaces are provided with several V-shaped corrugations extending in the horizontal direction. Each set of corrugated heat sinks is arranged at equal intervals along the height of the transformer body; three columnar connecting seats are fixed on one side of the transformer body, each connecting seat is arranged vertically and communicates with the inside of the transformer body; the end of the connecting seat away from the transformer body is connected to the side wall of the oil tank through a metal corrugated pipe, one end of the metal corrugated pipe is sealed and communicated with the connecting seat, and the other end is communicated with the inside of the oil tank; a filter assembly is connected in series in the middle of the metal corrugated pipe, the filter assembly is a cylindrical shell structure, its interior is provided with a mesh filter core, and the outer wall of the filter assembly is provided with heat dissipation corrugations consistent with the structure of the corrugated heat sinks.

[0006] Furthermore, the number of the triangular brackets is four sets, with two sets symmetrically distributed below both ends of the oil tank. The top of the triangular brackets is welded and fixed to the outer wall of the oil tank, and the bottom is bolted to the top of the transformer body. The opening angle of the V-shaped corrugations is 90° to 120°, and the depth of the corrugations is 8 to 15 mm. The spacing between two adjacent V-shaped corrugations is 10 to 20 mm. The housing of the filter assembly is detachably connected to the metal bellows via a flange, and the length of the filter assembly is 1 / 3 to 1 / 2 of the total length of the metal bellows. The end caps at both ends of the oil tank are outwardly convex arc-shaped structures, and the edges of the end caps are sealed to the oil tank body with bolts. The four corners of the bottom of the transformer body are provided with shock-absorbing support feet. The support feet are cylindrical rubber materials, and their tops are bonded and fixed to the bottom of the transformer body. The outer wall of the metal bellows is wrapped with a thermally conductive silicone layer with a thickness of 1 to 3 mm, and it is tightly fitted to the outer wall of the bellows.

[0007] One or more technical solutions provided in this application have at least the following technical effects or advantages compared with the prior art: This invention offers the following advantages: First, the horizontally suspended oil tank, connected to the transformer body via a triangular bracket, creates a heat dissipation cavity that promotes airflow and avoids the bottom heat dissipation dead zone problem caused by traditional direct-fit installation. Second, the V-shaped corrugated heat sinks on the transformer body, through a reasonable corrugation parameter design, significantly increase the heat dissipation area, and their evenly spaced arrangement ensures uniform heat dissipation and prevents localized heat buildup. Third, the thermally conductive silicone layer on the outer wall of the metal corrugated pipe enhances heat conduction during oil circulation, and the series-connected filter assembly removes impurities from the oil through the mesh filter core, preventing impurities from affecting heat dissipation; the corrugated outer wall further increases the heat dissipation path. Fourth, the arc-shaped end cap of the oil tank facilitates internal oil flow and reduces localized overheating. Through the synergy of multiple structures, comprehensive heat dissipation is achieved from the transformer body to the oil circulation and then to the oil tank, significantly improving heat dissipation efficiency.

[0008] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0009] Figure 1 This is an assembly diagram of the corrugated cooling oil tank of a transformer device according to the present invention; Figure 2 This is a bottom view of the corrugated cooling oil tank of a transformer device according to this utility model; Figure 3 This is an exploded view of the corrugated cooling oil tank of a transformer device according to the present invention. Figure 4 This is a perspective view of the heat sink of the corrugated cooling oil tank of a transformer device according to this utility model.

[0010] As shown in the figure: 1. Oil tank; 2. Triangular bracket; 3. Transformer body; 4. Corrugated heat sink; 5. Corrugated; 6. Connecting seat; 7. Metal bellows. Detailed Implementation

[0011] 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.

[0012] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0014] like Figure 1 , 2 As shown in Figures 3 and 4, the corrugated cooling oil tank of a transformer device of this utility model includes a cylindrical oil tank 1. The oil tank 1 is horizontally suspended and fixed to the top of the rectangular transformer body 3 by four sets of triangular brackets 2. The four sets of triangular brackets 2 are symmetrically distributed in pairs below both ends of the oil tank 1. The top end is welded to the outer wall of the oil tank 1, and the bottom end is connected to the top of the transformer body 3 by bolts, so that a 5cm wide heat dissipation cavity is formed between the bottom of the oil tank 1 and the top of the transformer body 3, which promotes air convection heat dissipation.

[0015] Six sets of corrugated heat sinks 4 are attached and fixed to the four outer sides of the transformer body 3. The corrugated heat sink 4 is a vertical rectangular plate with V-shaped corrugations 5 extending horizontally on its surface. The opening angle of the V-shaped corrugations 5 is 100°, the depth is 12mm, and the adjacent spacing is 15mm. The six sets of corrugated heat sinks 4 are arranged at intervals of 10cm along the height direction of the transformer body 3 to ensure that the heat is evenly dissipated in each area.

[0016] Three vertically arranged columnar connecting seats 6 are welded and fixed to one side of the transformer body 3. The connecting seats 6 are connected to the interior of the transformer body 3. The end of the connecting seat 6 away from the transformer body 3 is connected to the side wall of the oil tank 1 through a metal bellows 7. The two ends of the metal bellows 7 are sealed and welded to the connecting seats 6 and the oil tank 1 respectively. The outer wall is covered with a 2mm thick thermally conductive silicone layer. A cylindrical filter assembly is connected in series in the middle of the metal bellows 7. The housing of the filter assembly is connected to the metal bellows 7 by flange bolts. The length of the filter assembly is 1 / 2 of the total length of the metal bellows 7. The filter assembly has a stainless steel mesh filter core inside and a V-shaped heat dissipation corrugation 5 with the same structure as the corrugated heat sink 4 on the outer wall.

[0017] The end caps of the oil tank 1 are outwardly protruding arc-shaped steel plates, and the edges are sealed to the cylinder of the oil tank 1 by bolts to facilitate the flow of internal oil. The bottom of the transformer body 3 has cylindrical shock-absorbing support feet made of rubber, with a height of 8cm, which serve to reduce shock and provide stable support.

[0018] In this embodiment, during operation, part of the heat generated by the transformer body 3 is directly dissipated into the air through the corrugated heat sink 4, and the other part is transferred to the internal insulating oil. The insulating oil enters the metal bellows 7 through the connecting seat 6. When flowing through the filter assembly, impurities are trapped by the mesh filter core. At the same time, the heat of the oil is further dissipated through the thermally conductive silicone layer of the metal bellows 7 and the heat dissipation corrugations 5 of the filter assembly, and finally enters the oil tank 1. The oil in the oil tank 1 flows under the guidance of the arc-shaped end cap, and the heat is dissipated through the wall of the oil tank 1 and the heat dissipation cavity, achieving comprehensive and efficient heat dissipation. In this embodiment, In actual use, this device needs to be installed inside the transformer body along with the conventional iron core and winding assembly. The iron core is made of high-silicon steel sheets, and the windings are made of copper enameled wire. 25# transformer oil is injected into the tank and transformer body as an insulating and heat-conducting medium. The outer wall of the tank needs to be coated with a combination of rust-proof and weather-resistant epoxy zinc-rich primer and acrylic topcoat. The bolts connecting the triangular bracket to the transformer body are 8.8 grade high-strength carbon steel bolts with anti-loosening nuts. Thermal grease needs to be applied to the contact surface between the corrugated heat sink and the transformer body to enhance heat conduction. In addition, a pressure relief valve and oil temperature gauge need to be installed on the top of the tank. The pressure relief valve is used to automatically release pressure when the pressure in the oil tank exceeds the set value. The oil thermometer monitors the oil temperature in real time and is connected to the external control cabinet via wires. The sealing point between the metal bellows and the connecting seat is sealed with a nitrile rubber sealing ring. The mesh filter element of the filter assembly can be replaced periodically according to the usage cycle. When replacing, the filter assembly can be removed by unscrewing the bolts on the flange. At the same time, the output terminal of the transformer body needs to be connected to the external power grid cable through the terminal block. The terminal block uses a copper-aluminum transition material to reduce contact resistance. These existing technologies and the structure of this device work together to ensure the overall safety and stability of the transformer operation.

[0019] Specifically, in this embodiment, during operation, part of the heat generated by the transformer body 3 is directly dissipated into the air through the corrugated heat sink 4, and the other part is transferred to the internal insulating oil. The insulating oil enters the metal bellows 7 through the connecting seat 6. When flowing through the filter assembly, impurities are intercepted by the mesh filter core. At the same time, the heat of the oil is further dissipated through the thermally conductive silicone layer of the metal bellows 7 and the heat dissipation corrugations 5 of the filter assembly, and finally enters the oil tank 1. The oil in the oil tank 1 flows under the guidance of the arc-shaped end cap, and the heat is dissipated through the wall of the oil tank 1 and the heat dissipation cavity, achieving comprehensive and efficient heat dissipation. During the overall installation phase, the iron core made of high-silicon steel sheets and the windings wound with copper enameled wire must first be fixed inside the transformer body 3. The assembly gap between the iron core and the windings is filled with insulating cardboard for insulation. Then, 25# transformer oil is injected into the oil tank 1 and the transformer body 3 until the oil level reaches the preset oil level line at the top of the oil tank 1. During the oil injection process, the internal air is discharged through the exhaust valve at the top of the oil tank 1 to avoid air resistance affecting heat dissipation. Nitrile rubber sealing rings are fitted and sealant is applied at the bolt connection between the oil tank 1 and the end cover to ensure overall sealing performance and prevent oil leakage. At the same time, a pressure relief valve and a digital display oil temperature gauge are installed on the top of the oil tank 1. The pressure relief valve is set to 0.15MPa, and the probe of the oil temperature gauge is inserted into the oil inside the oil tank 1. Its signal output terminal is connected to the external... The control cabinet's display screen monitors the oil temperature in real time. Thermal grease must be evenly applied to the contact surfaces of the corrugated heat sink 4 and the transformer body 3, with a thickness controlled between 0.5-1mm. The corrugated heat sink 4 is then secured to the transformer body 3 using stainless steel bolts. The output terminals of the transformer body 3 must be connected to the external power grid cable via copper-aluminum transition terminals. The terminals and cable joints are crimped and secured with crimping pliers and wrapped with insulating and waterproof tape. During routine use, the filter assembly needs maintenance every six months. During maintenance, close the shut-off valves at both ends of the metal corrugated pipe 7, remove the bolts on the flange to remove the filter assembly, replace the internal stainless steel mesh filter element, and reinstall it. At the same time, regularly check the surface of the corrugated heat sink 4 for dust accumulation, and use compressed air to blow and clean it from both sides of the heat dissipation gap to ensure effective heat dissipation.

[0020] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

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