Dry-type distribution transformer

Abstract

The utility model relates to the technical field of transformers, and discloses a dry-type distribution transformer which comprises a bottom frame and a dry-type transformer body, the top of the bottom frame is provided with the dry-type transformer body, four corners of the top of the bottom frame are provided with supporting seats, the tops of the supporting seats are provided with hollow water cooling boxes, and the middle of each hollow water cooling box is provided with a V-shaped protrusion. The hollow water-cooling boxes are arranged on the two sides of the dry-type transformer body, V-shaped protrusions are arranged on the outer walls of the sides, close to the dry-type transformer body, of the hollow water-cooling boxes, the tip ends of the V-shaped protrusions face gaps between iron cores of the dry-type transformer body, and air guide fins are arranged on the outer walls of the sides, close to the dry-type transformer body, of the hollow water-cooling boxes. And in cooperation with the air guide fins and the V-shaped protruding structures of the hollow water cooling box, air can be guided into the dry-type transformer body, air flow inside and outside the dry-type transformer body is accelerated, and the heat dissipation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically a dry-type distribution transformer. Background Technology

[0002] Dry-type transformers are transformers that do not require insulating oil as a cooling medium. They primarily rely on natural cooling through air convection or forced air cooling for heat dissipation. This type of transformer is typically used for indoor installation and is commonly found in commercial buildings, hospitals, schools, and other locations where oil-immersed transformers are not permitted, as they do not cause oil contamination or flame spread in the event of a fire.

[0003] A Chinese patent (CN204155696U) discloses a dry-type heat dissipation transformer, comprising a housing and an iron core. The outer wall of the housing is fixed with an electrostatic protective cover. An intake fan is located at the bottom right side of the housing, and an exhaust fan is located at the upper left side. A cover is located on the top of the housing, and the cover is sealed and securely connected to the housing, with the cover situated inside the electrostatic protective cover. The cover has at least two lifting rings. At least two iron cores are provided, with I-beams between them. The iron cores are fixedly laid on support bars located at the bottom of the housing, with at least three support bars. Coils are wound around the iron cores, and heat dissipation plates are evenly spaced and fixedly mounted on the iron cores, with at least four heat dissipation plates.

[0004] However, the above-mentioned technical solutions use heat sinks for natural heat dissipation, or existing technologies also use fans that blow air upwards to dissipate heat on one or both sides of the bottom of the transformer. However, due to the obstruction of the transformer's own components, the heat dissipation effect is often mediocre. During operation, the transformer maintains a high temperature, which affects the transformer's working efficiency and service life. Utility Model Content

[0005] The purpose of this invention is to provide a dry-type distribution transformer to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dry-type distribution transformer, comprising a base frame and a dry-type transformer body, wherein the dry-type transformer body is provided on the top of the base frame, and support seats are provided at the four corners of the top of the base frame. A hollow water-cooled box is provided on the top of the support seats. A V-shaped protrusion is provided in the middle of the hollow water-cooled box, and the tip of the V-shaped protrusion faces the gap between the iron cores of the dry-type transformer body. A number of air guide fins are provided on the outer wall of the hollow water-cooled box near the dry-type transformer body. The air guide fins are arranged in layers at equal intervals on the hollow water-cooled box. There are two hollow water-cooled boxes, which are arranged opposite each other. A capillary tube is provided between the ends of the two hollow water-cooled boxes.

[0007] As a further explanation of this utility model, the two hollow water-cooled boxes are interconnected by capillary tubes, and there are several capillary tubes arranged in layers at equal intervals.

[0008] As a further explanation of this utility model, a cooling fan is provided on one side of the capillary tube, a filter screen is provided on the air inlet side of the cooling fan, and the air outlet of the cooling fan faces the main body of the dry-type transformer.

[0009] As a further explanation of this utility model, the hollow water-cooled box is provided with an inlet valve at the bottom of one end and an outlet valve at the top.

[0010] As a further explanation of this utility model, the outline of the air guide fins matches the outline of one side of the outer wall of the central control water-cooled box.

[0011] As a further explanation of this utility model, the hollow water-cooled box and the air guide fins are both made of insulating plastic.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model, through its base frame, dry-type transformer body, and hollow water-cooled box, enables the use of dry-type distribution transformers. A circulating water pump and water tank are connected via an inlet valve, and an outlet pipe is connected via an outlet valve. The pump continuously injects cooling water into the hollow water-cooled box, which then cools the exterior of the dry-type transformer body through natural heat dissipation. Simultaneously, a cooling fan blows air into the interior of the dry-type transformer body. The hollow water-cooled boxes on both sides concentrate the airflow on the exterior of the transformer body, causing rapid airflow. Combined with the air guide fins and the V-shaped protrusion structure of the hollow water-cooled box, this further guides air into the interior of the dry-type transformer body, accelerating airflow and improving heat dissipation. Attached Figure Description

[0014] Figure 1 This is a perspective view of a dry-type distribution transformer according to the present invention.

[0015] Figure 2 This is a front view of a dry-type distribution transformer according to this utility model;

[0016] Figure 3 This is a left view of a dry-type distribution transformer according to the present invention.

[0017] Figure 4 This is a right view of a dry-type distribution transformer according to the present invention.

[0018] Figure 5 This is a top view of a dry-type distribution transformer according to the present invention.

[0019] In the diagram: 1. Base frame; 2. Dry-type transformer body; 3. Support base; 4. Hollow water cooling box; 5. Inlet valve; 6. Outlet valve; 7. Cooling fan; 8. Capillary tube; 9. Air guide fins. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1-5 This utility model provides a technical solution: a dry-type distribution transformer, including a base frame 1 and a dry-type transformer body 2. The base frame 1 supports the entire dry-type transformer body, ensuring its stability and preventing damage caused by vibration or uneven ground. The dry-type transformer body 2 is located on the top of the base frame 1, and support seats 3 are located at the four corners of the top of the base frame 1. A hollow water-cooled box 4 is located on the top of the support seats 3. The hollow water-cooled box 4 has a V-shaped protrusion in the middle and has a hollow internal structure for filling with cooling water, which carries away the heat generated by the dry-type transformer body through water flow. The V-shaped protrusion design increases the surface area and improves heat exchange efficiency. The tip of the V-shaped protrusion faces the gap between the iron cores of the dry-type transformer body 2. The V-shaped protrusion is located in the center of the hollow water-cooled box, and its tip points to the gap between the iron cores of the dry-type transformer body. This helps guide the cooling water to flow through the key heat-generating areas and enhances the local cooling effect. The outer wall of the hollow water-cooled box 4 near the dry-type transformer body 2 is provided with air guide fins 9. There are several air guide fins 9, which are arranged in layers at equal intervals on the hollow water-cooled box 4. The arrangement of multiple air guide fins on the outside of the hollow water-cooled box can enhance air circulation and help the air to contact the hollow water-cooled box more effectively, thereby improving the heat exchange efficiency.

[0022] There are two hollow water-cooled boxes 4, which are arranged opposite each other, and a capillary tube 8 is provided between the ends of the two hollow water-cooled boxes 4. When the dry-type distribution transformer is in use, the circulating water pump and the water tank are connected through the water inlet valve 5, and the water outlet valve 6 is connected to the water outlet pipe. Cooling water is continuously injected into the hollow water-cooled boxes 4 by the water pump. The natural heat dissipation of the hollow water-cooled boxes 4 cools the outside of the dry-type transformer body 2. At the same time, the cooling fan 7 blows air into the dry-type transformer body 2. Through the hollow water-cooled boxes 4 on both sides, the air force of the cooling fan 7 is more concentrated on the outside of the dry-type transformer body 2, so that the air on the outside of the dry-type transformer body 2 flows rapidly. With the help of the air guide fins 9 and the V-shaped protrusion structure of the hollow water-cooled boxes 4, the air can be guided into the interior of the dry-type transformer body 2, accelerating the air flow inside and outside the dry-type transformer body 2 and improving the heat dissipation effect.

[0023] Two hollow water-cooled boxes 4 are interconnected by several capillary tubes 8 arranged in a layered, equidistant pattern. A capillary tube is a long, thin pipe used to connect the two hollow water-cooled boxes. In this design, the capillary tubes not only serve a connecting function but also provide additional heat exchange surface area through their elongated structure. The capillary tube design allows for uniform distribution of cooling water between the two boxes, thereby improving cooling efficiency. When cooling water flows from one hollow water-cooled box to the other, the presence of the capillary tubes increases the water's path length, allowing more time for heat exchange with the surrounding environment, thus better absorbing heat from the dry-type transformer body. Furthermore, the capillary tubes help maintain pressure balance within the water-cooled boxes, preventing obstructed cooling water flow due to pressure differences.

[0024] A cooling fan 7 is installed on one side of the capillary tube 8. A filter screen is installed on the air inlet side of the cooling fan 7, and the air outlet of the cooling fan 7 faces the dry-type transformer body 2. The cooling fan 7 is located on one side of the capillary tube 8 to ensure that the airflow generated by the fan can directly act on the capillary tube to help dissipate heat. The filter screen is installed on the air inlet side of the cooling fan to filter out dust and impurities in the air, preventing these particles from entering the cooling system and protecting the fan and transformer body from contamination. The air outlet faces the dry-type transformer body 2, so that the airflow generated by the fan can directly blow onto the transformer body, accelerating the airflow on its surface and improving heat dissipation efficiency.

[0025] The hollow water-cooled box 4 has an inlet valve 5 at the bottom and an outlet valve 6 at the top. This facilitates the circulation of cooling water. The bottom inlet ensures that the cooling water first contacts the hottest part, while the top outlet discharges the heated water, ensuring a uniform rise in water temperature and improving heat exchange efficiency.

[0026] The outline of the air guide fin 9 matches the outline of one side of the outer wall of the central control water-cooled box 4. This design, which matches the outline of one side of the outer wall of the hollow water-cooled box 4, maximizes the use of space, allowing the air guide fin to effectively guide airflow and increase the surface area in contact with the airflow, thereby improving the heat dissipation effect.

[0027] Both the hollow water-cooled box 4 and the air guide fins 9 are made of insulating plastic. This material not only provides excellent insulation to prevent electrical faults, but also reduces overall weight and improves corrosion resistance and durability. Furthermore, plastic materials generally have good processing properties, facilitating manufacturing and installation.

[0028] When using a dry-type distribution transformer, a circulating water pump and a water tank are connected through an inlet valve 5, and an outlet water pipe is connected through an outlet valve 6. Cooling water is continuously injected into the hollow water-cooled box 4 by the water pump. The natural heat dissipation of the hollow water-cooled box 4 cools the outside of the dry-type transformer body 2. At the same time, the cooling fan 7 blows air into the inside of the dry-type transformer body 2. Through the hollow water-cooled boxes 4 on both sides, the air force of the cooling fan 7 is more concentrated on the outside of the dry-type transformer body 2, which makes the air on the outside of the dry-type transformer body 2 flow rapidly. With the help of the air guide fins 9 and the V-shaped protrusion structure of the hollow water-cooled box 4, the air can be guided into the inside of the dry-type transformer body 2, accelerating the air flow inside and outside the dry-type transformer body 2 and improving the heat dissipation effect.

[0029] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A dry-type distribution transformer, comprising a base frame (1) and a dry-type transformer body (2), characterized in that: The base frame (1) is provided with a dry-type transformer body (2) on top. The base frame (1) is provided with support seats (3) at the four corners of the top. The support seats (3) are provided with a hollow water-cooled box (4) on top. The hollow water-cooled box (4) is provided with a V-shaped protrusion in the middle. The tip of the V-shaped protrusion faces the gap between the iron cores of the dry-type transformer body (2). The hollow water-cooled box (4) is provided with air guide fins (9) on the outer wall near the dry-type transformer body (2). There are several air guide fins (9). Several air guide fins (9) are arranged in layers at equal intervals on the hollow water-cooled box (4). There are two hollow water-cooled boxes (4). The two hollow water-cooled boxes (4) are arranged opposite each other. A capillary tube (8) is provided between the ends of the two hollow water-cooled boxes (4).

2. A dry-type distribution transformer according to claim 1, characterized in that: The two hollow water-cooled boxes (4) are interconnected by capillary tubes (8), and there are several capillary tubes (8) arranged in layers at equal intervals.

3. A dry-type distribution transformer according to claim 2, characterized in that: A cooling fan (7) is provided on one side of the capillary tube (8), a filter screen is provided on the air inlet side of the cooling fan (7), and the air outlet of the cooling fan (7) faces the dry transformer body (2).

4. A dry-type distribution transformer according to claim 1, characterized in that: The hollow water-cooled box (4) has an inlet valve (5) at one bottom and an outlet valve (6) at the top.

5. A dry-type distribution transformer according to claim 1, characterized in that: The outline of the air guide fin (9) matches the outline of one side of the outer wall of the central control water-cooled box (4).

6. A dry-type distribution transformer according to claim 1, characterized in that: The hollow water-cooled box (4) and the air guide fins (9) are both made of insulating plastic.

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