Compact integrated Huazi transformer

Abstract

The invention relates to the technical field of transformers, and discloses a compact integrated Huazi transformer which comprises an oil tank, an oil conservator, a low-voltage sleeve, a high-voltage sleeve, a heat dissipation assembly and a supporting frame. The oil conservator, the low-voltage bushing and the high-voltage bushing are arranged at the top of the oil tank; the oil tank is communicated with the conservator through a pipeline; the oil tank is arranged on the supporting frame; the heat dissipation assembly comprises a heat dissipation oil duct, a circulating pump, a fan and a liquid cooling box; transformer oil flows into the heat dissipation oil duct from one side of the oil tank and then flows back to the oil tank from the other opposite side of the oil tank through the heat dissipation oil duct; the circulating pump is used for driving transformer oil in the heat dissipation oil duct to flow; the fans are arranged on the two sides of the oil tank and used for blowing air to the heat dissipation oil channel for heat dissipation. The liquid cooling box is arranged at the bottom of the oil tank, and cooling liquid is contained in the liquid cooling box; the heat dissipation oil channel penetrates through the liquid cooling box. According to the technical scheme provided by the invention, the structure of the Huai-type transformer can be more compact, and the situation that the Huai-type transformer cannot be installed due to large volume and occupied area is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a compact integrated Chinese-style transformer. Background Art

[0002] The oil tank of a Chinese transformer is filled with transformer oil, and the iron core components of the transformer are immersed in the transformer oil. According to the heat dissipation conditions of the iron core components when working, the volume of the transformer oil in the oil tank will expand or shrink accordingly. In order to effectively transfer and store the transformer oil with expanded volume in the oil tank, and to ensure that the transformer oil with reduced volume in the oil tank can be replenished in a timely and effective manner, an oil-immersed transformer is usually provided with an oil pillow on the oil tank. The oil storage space of the oil pillow is connected to the oil storage space of the oil tank through a pipeline, thereby ensuring that the transformer oil in the oil tank is always full, thereby ensuring that the oil-immersed transformer can work safely and stably.

[0003] Existing Hua-style transformers primarily increase the heat dissipation area and improve heat dissipation efficiency by installing heat sinks connected to the fuel tank. To ensure adequate heat dissipation, the heat sinks are typically larger. This results in a larger fuel tank and further increases the transformer's size. In some areas with limited land, traditional Hua-style transformers are difficult to install due to their large size and footprint, which in turn affects their usability. Therefore, there is an urgent need for a compact, integrated Hua-style transformer to address the problem of traditional Hua-style transformers being difficult to install in land-constrained areas due to their large size and footprint. Summary of the Invention

[0004] The main purpose of the present invention is to provide a compact integrated Chinese-style transformer to solve the problem that traditional Chinese-style transformers cannot be installed in areas with limited land due to their large size and footprint.

[0005] To achieve the above-mentioned purpose, the compact integrated Chinese-style transformer proposed in the present invention includes an oil tank, an oil pillow, a low-voltage bushing, a high-voltage bushing, a heat dissipation component and a support frame; the oil pillow, the low-voltage bushing and the high-voltage bushing are all arranged on the top of the oil tank; a winding is arranged in the oil tank, and the low-voltage bushing and the high-voltage bushing are electrically connected to the winding through lead joints respectively; the oil tank and the oil pillow both contain transformer oil, and the oil tank and the oil pillow are connected through a pipeline; the oil tank is arranged on the support frame; the heat dissipation component includes A heat dissipation oil channel, a circulation pump, a fan and a liquid cooling box; transformer oil flows into the heat dissipation oil channel from one side of the oil tank, and then flows back to the oil tank from the other opposite side of the oil tank through the heat dissipation oil channel; the circulation pump is used to drive the transformer oil in the heat dissipation oil channel to flow; the fan is arranged on both sides of the oil tank to blow air to the heat dissipation oil channel for heat dissipation; the liquid cooling box is arranged at the bottom of the oil tank, and the liquid cooling box contains coolant; the heat dissipation oil channel is passed through the liquid cooling box for heat exchange with the coolant.

[0006] Preferably, the heat dissipation oil channel includes a first oil channel, a second oil channel, a third oil channel, a fourth oil channel and a fifth oil channel; one end of the first oil channel is connected to the upper part of one side wall of the oil tank, and the other end is connected to one end of the second oil channel; the second oil channel is spiral-shaped; the other end of the second oil channel is connected to one end of the third oil channel; the third oil channel passes through the liquid cooling box, and the pipe section of the third oil channel located in the liquid cooling box is S-shaped; the other end of the third oil channel is connected to one end of the fourth oil channel; the fourth oil channel is spiral-shaped; the other end of the fourth oil channel is connected to one end of the fifth oil channel, and the other end of the fifth oil channel is connected to the upper part of the opposite other side of the oil tank.

[0007] Preferably, the two opposite side walls of the oil tank are respectively provided with enclosing covers facing each other; the enclosing covers are cylindrical and open at both ends; the side walls of the enclosing covers are penetrated by evenly distributed heat dissipation holes; the second oil channel and the fourth oil channel are respectively located in the two enclosing covers.

[0008] Preferably, the fan is arranged on the support frame and is located below the enclosure; the air outlet cover of the fan is provided with an air induced draft cover; the air outlet of the air induced draft cover is conical, and the air outlet of the air induced draft cover is opposite to the bottom opening of the enclosure.

[0009] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut.

[0010] Preferably, two mounting beams parallel to each other and spaced apart are respectively provided at both ends of the first support plate, the mounting beams are perpendicular to the support columns, and the fan is installed on the top walls of the two mounting beams; the same frame is provided with two support columns, and the two support columns are respectively located at both ends of the second support plate; the first mounting plate is connected to the support columns.

[0011] Preferably, rain shields are respectively provided on the upper parts of the two opposite sides of the oil tank; the rain shields are arranged to be inclined downward and are located above the enclosure.

[0012] Preferably, the top projection of the oil tank is an oblong; there are at least two groups of heat dissipation oil channels, and the heat dissipation oil channels are arranged at equal intervals along the length direction of the oil tank; the number of the circulating pumps and the heat dissipation oil channels is the same, and the circulating pumps correspond to the heat dissipation oil channels one by one.

[0013] Preferably, the first oil passage is connected to the second oil passage through a first flange; the second oil passage is connected to the third oil passage through a second flange; the third oil passage is connected to the fourth oil passage through a third flange; and the fourth oil passage is connected to the fifth oil passage through a fourth flange.

[0014] Preferably, the compact integrated Chinese-style transformer further includes a solenoid valve, a temperature sensor and a controller; the first oil channel 6 and the fifth oil channel 15 are both provided with the solenoid valve 7; the temperature sensor is arranged inside the oil tank to monitor the oil temperature of the transformer oil; the controller is respectively communicated with the solenoid valve and the temperature sensor to receive the oil temperature of the transformer oil collected by the temperature sensor and to control the opening and closing of the solenoid valve.

[0015] In the technical solution of the present invention, the compact integrated Chinese-style transformer uses cooling oil channels instead of traditional heat sinks. A circulating pump drives the transformer oil to flow through the cooling oil channels, causing it to flow out of one side of the oil tank and into the other side. This design not only promotes heat dissipation by driving the transformer oil flow, but also effectively reduces the footprint compared to larger heat sinks, making the transformer more compact. Furthermore, fans are installed on both sides of the oil tank to blow air upward through the cooling oil channels, dissipating heat. A liquid cooling tank is also located at the bottom of the oil tank, allowing the cooling oil channels to pass through the liquid cooling tank for heat exchange with the coolant. This dual cooling mode of air and liquid cooling significantly improves the transformer's heat dissipation capacity without increasing the transformer's footprint. Therefore, the technical solution proposed by the present invention makes the Chinese-style transformer more compact while maintaining heat dissipation capacity, solving the problem of traditional Chinese-style transformers being difficult to install in land-constrained areas due to their large size and footprint. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the compact integrated Chinese-style transformer of the present invention;

[0018] Figure 2 is a partial cross-sectional view of a compact integrated Chinese-style transformer according to the present invention;

[0019] Figure 3 A top view of the compact integrated Chinese-style transformer of the present invention;

[0020] Figure 4 A top view of a bracket of a compact integrated Chinese-style transformer according to the present invention;

[0021] Figure 5 It is a cross-sectional structural diagram of the air induced hood of the compact integrated Chinese-style transformer of the present invention;

[0022] Figure 6 This is a diagram showing the internal structure of the liquid cooling box of the compact integrated Chinese-style transformer of the present invention.

[0023] Description of Figure Numbers:

[0024] 1-Oil tank; 2-Oil pillow; 3-Low-pressure bushing; 4-High-pressure bushing; 5-Rain shield; 6-First oil channel; 7-Solenoid valve; 8-First flange; 9-Second oil channel; 10-Third oil channel; 11-Second flange; 12-Circulating pump; 13-Third flange; 14-Fourth oil channel; 15-Fifth oil channel; 16-Fourth flange; 17-Enclosure; 18-Heating holes; 19-Fan; 20-Draft hood; 21-First support plate; 22-Support column; 23-Second support plate; 24-First mounting plate; 25-Second mounting plate; 26-Liquid cooling box; 27-Mounting beam; 28-Connecting beam.

[0025] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0029] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides a compact integrated Chinese-style transformer.

[0032] Please refer to Figures 1 to 6 The compact integrated Chinese-style transformer includes an oil tank 1, an oil pillow 2, a low-voltage bushing 3, a high-voltage bushing 4, a heat dissipation component and a support frame; the oil pillow 2, the low-voltage bushing 3 and the high-voltage bushing 4 are all arranged on the top of the oil tank 1; a winding is arranged in the oil tank 1, and the low-voltage bushing 3 and the high-voltage bushing 4 are electrically connected to the winding through a lead joint; the oil tank 1 and the oil pillow 2 both contain transformer oil, and the oil tank 1 and the oil pillow 2 are connected through a pipeline; the oil tank 1 is arranged on the support frame; the heat dissipation component includes a heat dissipation oil channel, a circulation pump 12, Fan 19 and liquid cooling box 26; transformer oil flows into the heat dissipation oil channel from one side of the oil tank 1, and then flows back to the oil tank 1 from the other opposite side of the oil tank 1 through the heat dissipation oil channel; the circulating pump 12 is used to drive the transformer oil in the heat dissipation oil channel to flow; the fan 19 is arranged on both sides of the oil tank 1 to blow air to the heat dissipation oil channel for heat dissipation; the liquid cooling box 26 is arranged at the bottom of the oil tank 1, and the liquid cooling box 26 contains coolant (such as mineral oil); the heat dissipation oil channel is penetrated by the liquid cooling box 26 for heat exchange with the coolant.

[0033] In the technical solution of the present invention, the compact integrated Chinese-style transformer uses cooling oil channels instead of traditional heat sinks. A circulating pump drives the transformer oil to flow through the cooling oil channels, causing it to flow out of one side of the oil tank 1 and into the other side of the oil tank 1. This design not only promotes heat dissipation by driving the transformer oil flow, but also effectively reduces the footprint compared to larger heat sinks, making the transformer more compact. Furthermore, fans 19 are provided on both sides of the oil tank 1 to blow air upwards through the cooling oil channels to dissipate heat. A liquid cooling box 26 is also provided at the bottom of the oil tank 1, allowing the cooling oil channels to pass through the liquid cooling box 26 for heat exchange with the coolant. This dual cooling mode of air and liquid cooling significantly improves the transformer's heat dissipation capacity without increasing the transformer's footprint. Therefore, the technical solution proposed by the present invention makes the Chinese-style transformer more compact while ensuring heat dissipation capacity, solving the problem of traditional Chinese-style transformers being difficult to install in land-constrained areas due to their large size and footprint.

[0034] Specifically, the heat dissipation oil passages include a first oil passage 6, a second oil passage 9, a third oil passage 10, a fourth oil passage 14, and a fifth oil passage 15. One end of the first oil passage 6 connects to the upper portion of a sidewall of the fuel tank 1, and the other end connects to one end of the second oil passage 9. The second oil passage 9 is spiral-shaped, and the other end connects to one end of the third oil passage 10. The third oil passage 10 passes through the liquid cooling tank 26, with the section of the third oil passage 10 within the liquid cooling tank 26 forming an S-shape. The other end of the third oil passage 10 connects to one end of the fourth oil passage 14. The fourth oil passage 14 is spiral-shaped, and the other end of the fourth oil passage 14 connects to one end of the fifth oil passage 15, the other end of which connects to the upper portion of the opposite side of the fuel tank 1. The spiral-shaped second and fourth oil passages 9 and 14 effectively extend the length of the oil passages without increasing floor space, thereby further improving heat dissipation. The S-shaped section of the third oil passage 10 within the liquid cooling tank 26 increases the contact area between the oil passage and the coolant, thereby improving heat dissipation efficiency.

[0035] In this embodiment, the central axes of the second oil channel 9 and the fourth oil channel 14 are arranged vertically, and the second oil channel 9 and the fourth oil channel 14 are opposite to each other; there are three groups of heat dissipation oil channels, and the three groups of heat dissipation oil channels are evenly spaced; the liquid cooling box 26 is also respectively provided with a liquid inlet and a liquid outlet to facilitate the replacement of the coolant.

[0036] Furthermore, the pipe sections of the second oil channel 9, the fourth oil channel 14, and the third oil channel 10 located in the liquid cooling box 26 are all corrugated tubes to increase the heat dissipation area; the top wall of the liquid cooling box 26 is in contact with the bottom wall of the oil tank 1, so that the transformer oil can transfer heat to the liquid cooling box 26 through the bottom wall of the oil tank 1, thereby improving the heat dissipation capacity; the two opposite side walls of the liquid cooling box 26 that are not penetrated by the heat dissipation oil channel are provided with heat dissipation fins to promote heat dissipation of the coolant.

[0037] Specifically, two opposing walls of the fuel tank 1 are each provided with a facing enclosure 17. The enclosure 17 is cylindrical and open at both ends. Evenly distributed heat dissipation holes 18 are formed through the sidewalls of the enclosure 17. The second oil passage 9 and the fourth oil passage 14 are located within the two enclosures 17, respectively. Using the enclosures 17 to cover the second and fourth oil passages 9, 14 concentrates the airflow from the fan 19, improving the heat dissipation within the passages. The design of the heat dissipation holes 18 prevents heat from accumulating within the enclosure 17 and affecting heat dissipation.

[0038] The axial direction of the enclosure 17 is vertical. In this embodiment, three enclosures 17 are respectively provided on both sides of the oil tank 1, wherein three enclosures 17 are respectively provided to cover the three second oil passages 9, and the other three enclosures 17 are respectively provided to cover the three fourth oil passages 14.

[0039] A fan 19 is mounted on a support frame and positioned below the enclosure 17. A draft shield 20 is provided at the fan 19's air outlet. The draft shield 20 has a conical air outlet that faces the bottom opening of the enclosure 17. The fan 19 blows upward from below, utilizing the natural upward tendency of hot air to enhance heat dissipation. The draft shield 20 serves to concentrate the airflow.

[0040] The induced draft hood 20 is removably attached to the air outlet of the fan 19. The number of air outlets on the induced draft hood 20 matches the number of air outlets on the surrounding hood 17, and they correspond one to one. In this embodiment, there are two fans 19, located below the second oil passage 9 and the fourth oil passage 14, respectively. Each fan 19 is equipped with an induced draft hood 20, and each induced draft hood 20 has three air outlets.

[0041] Please refer to Figure 4 The support frame includes a frame body, a first mounting plate 24, a second mounting plate 25, a mounting beam 27 and a connecting beam 28; the frame body includes a support column 22, and a first support plate 21 and a second support plate 23 respectively arranged perpendicularly at both ends of the support column 22, and the second support plate 23 is used to connect the bottom of the fuel tank 1; the number of frames is 2, the two frames are opposite to each other, and are connected by two parallel and opposite connecting beams 28; one end of the connecting beam 28 is connected to the support column 22 of one frame body, and the other end is connected to the support column of the other frame body 22; a first mounting plate 24, parallel to the first support plate 21, is provided between the two frames. The first mounting plate 24 is used to mount a liquid cooling box 26; a second mounting plate 25 is provided above one of the connecting beams 28. The second mounting plate 25 is used to mount the circulating pump 12; mounting beams 27 are also provided at each end of the first support plate 21. One end of the mounting beam 27 is connected to the top wall of the first support plate 21 of one frame, and the other end is connected to the top wall of the first support plate 21 of the other frame; the mounting beams 27 are used to mount the fan 19. The oil tank 1 is mounted on the support frame so that the bottom of the oil tank 1 is suspended in the air, preventing heat accumulation at the bottom.

[0042] Specifically, the support frame is a stainless steel frame; the second mounting plate 25 is a rectangular plate; the second mounting plates 25 are arranged at equal intervals along the length of the connecting beam 28, and the number of the second mounting plates 25 is consistent with the number of the circulating pumps 12, and corresponds one to one.

[0043] Two mounting beams 27 parallel to each other and spaced apart are respectively provided at both ends of the first support plate 21. The mounting beams 27 are perpendicular to the support columns 22, and the fan 19 is mounted on the top walls of the two mounting beams 27. Two support columns 22 are provided on the same frame, and the two support columns 22 are respectively located at both ends of the second support plate 23. The first mounting plate 24 is connected to the support columns 22.

[0044] Specifically, the first support plate 21 is fixed to the ground via bolts, and the second support plate 23 is fixed to the bottom of the fuel tank 1 via bolts. The liquid cooling box 26 is located between the two frames, and the fan 19 is fixed to the two mounting beams 27 via bolts. Furthermore, a shock-absorbing pad is provided on the side of the second support plate 23 facing away from the support column 22. The shock-absorbing pad can be a rubber pad.

[0045] Rain shields 5 are installed on opposite sides of the fuel tank 1. These shields 5 are tilted downward and positioned above the enclosure 17. They prevent rain from falling onto the fan 19 and potentially damaging it. Specifically, the lowest point of the shields 5 is at least 30 centimeters from the top of the enclosure 17 to prevent them from obstructing the flow of hot air out of the top opening of the enclosure 17.

[0046] The fuel tank 1 has an oblong shape when viewed from above. There are at least two sets of cooling oil passages, evenly spaced along the length of the tank 1. There are the same number of circulating pumps 12 as there are cooling oil passages, with each corresponding to a specific one. The oblong shape of the fuel tank 1 facilitates adaptation to limited space and creates a more compact structure. In this embodiment, there are three sets of cooling oil passages, evenly spaced along the length of the tank 1.

[0047] Specifically, the first oil passage 6 is connected to the second oil passage 9 via a first flange 8; the second oil passage 9 is connected to the third oil passage 10 via a second flange 11; the third oil passage 10 is connected to the fourth oil passage 14 via a third flange 13; and the fourth oil passage 14 is connected to the fifth oil passage 15 via a fourth flange 16. The flange connection provides excellent sealing and is easy to maintain and replace. The segmented connection of the heat dissipation oil passages via flanges facilitates assembly.

[0048] The compact integrated Chinese-style transformer also includes a solenoid valve 7, a temperature sensor and a controller; the first oil channel 6 and the fifth oil channel 15 are both provided with the solenoid valve 7; the temperature sensor is arranged inside the oil tank 1 to monitor the oil temperature of the transformer oil; the controller is respectively communicated with the solenoid valve 7 and the temperature sensor to receive the oil temperature of the transformer oil collected by the temperature sensor and control the opening and closing of the solenoid valve 7.

[0049] Specifically, the controller is also connected to the circulation pump 12 in communication to control the start and stop of the circulation pump 12; there are multiple temperature sensors, and the multiple temperature sensors are respectively arranged at the bottom, middle and upper parts of the oil tank 1. The multiple temperature sensors can send the collected oil temperatures to the controller respectively, and the controller obtains the current average oil temperature through multiple oil temperature data; when the average oil temperature is in the first temperature range (such as below 50 degrees Celsius), the controller controls the solenoid valve 7 to open and controls the circulation pump 12 to stop working; when the average oil temperature is in the second temperature range (such as above 50 degrees Celsius), the controller controls the solenoid valve 7 to open and controls the circulation pump 12 to start; when the heat dissipation oil channel needs to be maintained and replaced, the controller controls the solenoid valve 7 to close and controls the circulation pump 12 to stop working. The temperature sensors and controllers are both existing technologies and need not be described here.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A compact integrated Chinese-style transformer, characterized in that, The invention comprises an oil tank (1), an oil pillow (2), a low-voltage bushing (3), a high-voltage bushing (4), a heat dissipation component and a support frame; the oil pillow (2), the low-voltage bushing (3) and the high-voltage bushing (4) are all arranged on the top of the oil tank (1); a winding is arranged in the oil tank (1), and the low-voltage bushing (3) and the high-voltage bushing (4) are respectively electrically connected to the winding through a lead joint; the oil tank (1) and the oil pillow (2) both contain transformer oil, and the oil tank (1) and the oil pillow (2) are connected through a pipeline; the oil tank (1) is arranged on the support frame; the heat dissipation component comprises a heat dissipation oil channel, a circulation pump (12) , a fan (19) and a liquid cooling box (26); transformer oil flows from one side of the oil tank (1) into the heat dissipation oil channel, and then flows back to the oil tank (1) from the other side opposite to the oil tank (1) through the heat dissipation oil channel; the circulating pump (12) is used to drive the transformer oil in the heat dissipation oil channel to flow; the fan (19) is arranged on both sides of the oil tank (1) to blow air to the heat dissipation oil channel for heat dissipation; the liquid cooling box (26) is arranged at the bottom of the oil tank (1), and the liquid cooling box (26) contains coolant; the heat dissipation oil channel is passed through the liquid cooling box (26) to exchange heat with the coolant.

2. The compact integrated Chinese-style transformer according to claim 1, characterized in that: The heat dissipation oil channel includes a first oil channel (6), a second oil channel (9), a third oil channel (10), a fourth oil channel (14) and a fifth oil channel (15); one end of the first oil channel (6) is connected to the upper part of a side wall of the oil tank (1), and the other end is connected to one end of the second oil channel (9); the second oil channel (9) is spiral-shaped; the other end of the second oil channel (9) is connected to one end of the third oil channel (10); the third oil channel (10) is arranged in the liquid cooling box (26), and the pipe section of the third oil channel (10) located in the liquid cooling box (26) is S-shaped; the other end of the third oil channel (10) is connected to one end of the fourth oil channel (14); the fourth oil channel (14) is spiral-shaped; the other end of the fourth oil channel (14) is connected to one end of the fifth oil channel (15), and the other end of the fifth oil channel (15) is connected to the upper part of the other opposite side of the oil tank (1).

3. The compact integrated Chinese-style transformer according to claim 2, characterized in that: The oil tank (1) is provided with two opposite side walls, respectively, of which the enclosing covers (17) are opposite to each other; the enclosing covers (17) are cylindrical and open at both ends; the side walls of the enclosing covers (17) are penetrated by evenly distributed heat dissipation holes (18); the second oil passage (9) and the fourth oil passage (14) are respectively located in the two enclosing covers (17).

4. The compact integrated Chinese-style transformer according to claim 3, characterized in that: The fan (19) is arranged on the support frame and is located below the enclosure (17); the air outlet cover of the fan (19) is provided with an air induction cover (20); the air outlet of the air induction cover (20) is conical, and the air outlet of the air induction cover (20) is directly opposite to the bottom opening of the enclosure (17).

5. The compact integrated Chinese-style transformer according to claim 1, characterized in that: The support frame includes a frame body, a first mounting plate (24), a second mounting plate (25), a mounting beam (27) and a connecting beam (28); the frame body includes a support column (22), and a first support plate (21) and a second support plate (23) respectively arranged perpendicularly at both ends of the support column (22), the second support plate (23) being used to connect the bottom of the oil tank (1); the number of the frame bodies is two, the two frame bodies are opposite to each other, and are connected by two connecting beams (28) that are parallel and opposite to each other; one end of the connecting beam (28) is connected to the support column (22) of one of the frame bodies, and the other end is connected to the support column (22) of the other frame body; the two frame bodies are connected to each other. The first mounting plate (24) parallel to the first support plate (21) is provided between the frames, and the first mounting plate (24) is used to install the liquid cooling box (26); the second mounting plate (25) is provided above one of the connecting beams (28), and the second mounting plate (25) is used to install the circulating pump (12); the mounting beams (27) are also provided at both ends of the first support plate (21), one end of the mounting beam (27) is connected to the top wall of the first support plate (21) of one of the frames, and the other end is connected to the top wall of the first support plate (21) of the other frame; the mounting beam (27) is used to install the fan (19).

6. The compact integrated Chinese-style transformer according to claim 5, characterized in that: Two mounting beams (27) are provided at both ends of the first support plate (21), which are parallel to each other and spaced apart. The mounting beams (27) are perpendicular to the support columns (22), and the fan (19) is installed on the top walls of the two mounting beams (27). The same frame is provided with two support columns (22), and the two support columns (22) are respectively located at both ends of the second support plate (23). The first mounting plate (24) is connected to the support columns (22).

7. The compact integrated Chinese-style transformer according to claim 3, characterized in that: Rain shields (5) are respectively provided on the upper parts of the two opposite sides of the oil tank (1); the rain shields (5) are arranged tilted downward and are located above the surrounding cover (17).

8. The compact integrated Chinese-style transformer according to claim 1, characterized in that: The oil tank (1) is in the shape of an oblong when viewed from above; there are at least two groups of heat dissipation oil passages, and the heat dissipation oil passages are arranged at equal intervals along the length direction of the oil tank (1); the number of the circulating pumps (12) and the heat dissipation oil passages is the same, and the circulating pumps (12) correspond to the heat dissipation oil passages one by one.

9. The compact integrated Chinese-style transformer according to claim 2, characterized in that: The first oil passage (6) is connected to the second oil passage (9) via a first flange (8); the second oil passage (9) is connected to the third oil passage (10) via a second flange (11); the third oil passage (10) is connected to the fourth oil passage (14) via a third flange (13); and the fourth oil passage (14) is connected to the fifth oil passage (15) via a fourth flange (16).

10. The compact integrated Chinese-style transformer according to claim 2, characterized in that: The invention also includes a solenoid valve (7), a temperature sensor and a controller; the first oil passage (6) and the fifth oil passage (15) are both provided with the solenoid valve (7); the temperature sensor is provided inside the oil tank (1) for monitoring the oil temperature of the transformer oil; the controller is respectively connected to the solenoid valve (7) and the temperature sensor for receiving the oil temperature of the transformer oil collected by the temperature sensor and controlling the opening and closing of the solenoid valve (7).

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