Dry-type transformer

Abstract

The utility model relates to the technical field of transformers, and discloses a dry-type transformer which comprises a supporting frame, a shell is fixedly connected to the top of the supporting frame, a transformer body is arranged in the shell, first cooling fins are fixedly connected to the outer portion of the shell, a cooling box is fixedly connected to the top of the supporting frame, and a cooling assembly is arranged in the shell. The heat dissipation assembly comprises a first cooling pipe, the first cooling pipe is arranged in the shell in a penetrating mode, a second cooling fin is fixedly connected into the heat dissipation box, a heat dissipation fan is fixedly connected into the heat dissipation box, a second cooling pipe is arranged in the second cooling fin in a penetrating mode, and the output end and the input end of the second cooling pipe are each provided with a connecting assembly. According to the transformer, cooling liquid in the first cooling pipe flows in the shell and is matched with the first cooling fins to discharge heat of the transformer body, the cooling liquid absorbing heat enters the second cooling pipe through the first cooling pipe to circularly flow, and the effect of effectively circularly cooling the transformer body is achieved.

Description

Technical Field

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

[0002] In modern power systems, dry-type transformers are an important type of power equipment, widely used in various locations such as commercial buildings, residential communities, factories, and environments with high fire safety requirements, such as hospitals and schools. Compared with oil-immersed transformers, dry-type transformers have many advantages, such as being oil-free, flame-retardant, and maintenance-free, which can effectively reduce the risk of fire and improve the reliability and safety of power supply. However, dry-type transformers generate a lot of heat during operation. If heat cannot be dissipated in a timely and effective manner, the transformer temperature will become too high, which will affect its insulation performance, reduce its service life, and even cause failures, affecting the normal operation of the power system. Therefore, efficient and reliable heat dissipation is crucial for the stable operation and widespread application of dry-type transformers.

[0003] The main heat dissipation methods for dry-type transformers include natural air cooling and forced air cooling. Natural air cooling uses the natural convection of air to remove the heat generated by the transformer. Heat sinks are usually installed on the transformer casing to increase the heat dissipation area and improve heat dissipation efficiency. Forced air cooling is based on natural air cooling, but adds a fan to force airflow and accelerate heat dissipation, so that air flows quickly over heat-generating components such as heat sinks and transformer windings.

[0004] However, existing dry-type transformer cooling technologies suffer from difficulties in achieving efficient circulating cooling. Natural air cooling is limited by natural air convection, resulting in slow heat dissipation and failing to meet the cooling requirements of large-capacity, high-load dry-type transformers. While forced air cooling enhances airflow with the help of fans, the intermittent operation of the fans makes the cooling process unstable and difficult to guarantee continuous and effective circulating cooling. This inability to achieve efficient circulating cooling affects the overall performance and reliability of the transformer. Therefore, a dry-type transformer is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a dry-type transformer, which aims to improve the problems in the prior art of difficulty in achieving efficient circulating cooling of transformers, unstable heat dissipation process, and impact on the overall performance and reliability of transformers.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dry-type transformer includes a support frame, a housing fixedly connected to the top of the support frame, a transformer body disposed inside the housing, a heat sink fixedly connected to the outside of the housing, a heat dissipation box fixedly connected to the top of the support frame, and a heat dissipation assembly disposed inside the housing.

[0008] The heat dissipation assembly includes a cooling pipe, which passes through the inside of the outer shell. A heat sink is fixedly connected inside the heat dissipation box, and a cooling fan is fixedly connected inside the heat dissipation box. A cooling pipe passes through the heat sink, and a connecting component is provided at both the output and input ends of the cooling pipe.

[0009] As a further description of the above technical solution:

[0010] The connection assembly includes two connectors and retaining rings. One end of each connector is fixedly connected to the output end and the input end of the cooling pipe, respectively. The outer walls of both retaining rings are fixedly connected to the inside of the connectors.

[0011] As a further description of the above technical solution:

[0012] Both the output and input ends of the cooling pipe are fixedly connected to connector 1, and the two connectors 1 are slidably connected inside the two connectors 2 respectively.

[0013] As a further description of the above technical solution:

[0014] Both of the two connectors have a convex ring fixedly connected to their outer walls, and both of the two connectors have a sliding sleeve slidably connected to their outer walls.

[0015] As a further description of the above technical solution:

[0016] Both of the sliding sleeves have internal slots, and both of the connectors have internally slidably connected ball bearings.

[0017] As a further description of the above technical solution:

[0018] Both of the two connectors are fitted with springs on their outer walls, and the two springs are respectively located inside the two empty slots.

[0019] As a further description of the above technical solution:

[0020] Both ends of the two springs are fixedly connected inside the two sliding sleeves, and the retaining ball is in contact with the convex ring.

[0021] As a further description of the above technical solution:

[0022] The heat dissipation box is equipped with heat dissipation windows.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the coolant inside the first cooling pipe flows inside the outer shell, and the heat dissipation fins inside the outer shell dissipate the heat of the transformer body. The coolant after absorbing heat enters the second cooling pipe through the first cooling pipe and circulates, which achieves the effect of effectively circulating cooling of the transformer body. This solves the problem of difficulty in achieving efficient circulating cooling of the transformer, unstable heat dissipation process, and the impact on the overall performance and reliability of the transformer, thereby improving the service life of the transformer.

[0025] 2. In this utility model, by pulling the sliding sleeve, the retaining ball that is stuck on the outer wall of the convex ring is released, and the first connector is pulled out from the inside of the second connector. During installation, the sliding sleeve is pulled to compress the internal spring, and the first connector is reinserted into the retaining ring inside the second connector. The sliding sleeve is then released, the spring is de-stressed and rebounds, causing the sliding sleeve to return to its original position. The sliding sleeve presses the retaining ball to lock it onto the outer wall of the convex ring, thus completing the fixation. This achieves the effect of facilitating the disassembly and assembly of the heat sink and the outer shell. It solves the problem that the heat sink and the outer shell are tightly connected in the traditional way, making disassembly and assembly difficult and causing the transformer to be difficult to handle the heat dissipation components flexibly during maintenance, thereby improving the flexibility of the transformer. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a dry-type transformer proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of the casing of a dry-type transformer proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the internal structure of the heat dissipation box of a dry-type transformer proposed in this utility model.

[0029] Figure 4 This is a schematic diagram of the ball-locking structure of a dry-type transformer proposed in this utility model.

[0030] Legend:

[0031] 1. Support frame; 2. Outer shell; 3. Transformer body; 4. Heat sink 1; 5. Heat sink box; 6. Cooling pipe 1; 7. Connector 1; 8. Heat sink 2; 9. Cooling fan; 10. Heat dissipation window; 11. Cooling pipe 2; 12. Connector 2; 13. Raised ring; 14. Snap ring; 15. Sliding sleeve; 16. Hollow slot; 17. Spring; 18. Snap ball. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1-3 This utility model provides an embodiment of a dry-type transformer, including a support frame 1. A housing 2 is fixedly connected to the top of the support frame 1. The housing 2 is the external protective structure of the entire transformer, mainly used to protect and isolate the transformer from the influence of the external environment on its internal components. A transformer body 3 is housed inside the housing 2. The transformer body 3 is the core part of the dry-type transformer, responsible for the conversion of electrical energy. It contains windings and an iron core. A heat sink 4 is fixedly connected to the outside of the housing 2, mainly to increase the heat dissipation surface area. A heat dissipation box 5 is fixedly connected to the top of the support frame 1, and a heat dissipation assembly is housed inside the housing 2.

[0034] The heat dissipation assembly includes a cooling pipe 6, which is installed inside the outer casing 2. A heat sink 8 is fixedly connected inside the heat dissipation box 5. The cooling pipe 6 carries away the heat generated by the transformer body 3 by delivering coolant, and the heat dissipation effect is further optimized by the heat sink 4 and the cooling pipe 11. A cooling fan 9 is fixedly connected inside the heat dissipation box 5 to accelerate the heat exchange of the coolant, thereby effectively reducing the temperature of the coolant. The cooling pipe 11 is installed inside the heat sink 8. Both the output and input ends of the cooling pipe 11 are equipped with connecting components. A heat dissipation window 10 is provided inside the heat dissipation box 5.

[0035] Specifically, in the process of using this dry-type transformer, firstly, the coolant inside the cooling pipe 6 flows inside the outer casing 2, carrying away the heat generated by the transformer body 3. The coolant enters from the input end of the cooling pipe 6 and flows inside the outer casing 2, fully absorbing the heat of the transformer body 3. During this process, the outer casing 2 is equipped with heat sink 4, which allows the heat generated by the transformer body 3 to be effectively transferred to the coolant. Subsequently, the coolant, after absorbing heat, is discharged into connector 12 through the output end of the cooling pipe 6. Connector 12 transfers the coolant from the cooling pipe 6 to the cooling pipe 11. The cooling pipe 11 further guides the coolant to the heat sink 8. Through circulation, the coolant continues to absorb heat inside the cooling pipe 11. The heat sink 5 is equipped with a cooling fan 9, which quickly exhausts the heat from the surface of the heat sink 8 to the outside of the heat sink 5, ensuring that the coolant can absorb and carry away the heat of the transformer body 3 in a short time, thereby achieving a stable cooling effect. Through this closed-loop circulation, the temperature of the transformer body 3 is kept within a safe operating range, effectively preventing overheating.

[0036] Reference Figure 1 and Figure 4 The connecting assembly includes two connectors 12 and retaining rings 14. One end of each connector 12 is fixedly connected to the output and input ends of the cooling pipe 11, respectively. Connectors 12 are mainly used to connect the cooling pipe 6 and the cooling pipe 11. The outer walls of the two retaining rings 14 are fixedly connected to the inside of connectors 12. Connectors 7 are fixedly connected to both the output and input ends of the cooling pipe 6. Connectors 7 are located at the inlet and outlet ends of the cooling pipe 6 and serve to transfer coolant to connectors 12. The two connectors 7 are slidably connected to the inside of the two connectors 12, respectively. The outer walls of the two connectors 17 are fixedly connected to protruding rings 13. The main function of the protruding rings 13 is to engage with retaining rings 14. The 8-phase contact prevents unnecessary sliding or detachment between connector 11 (7) and connector 2 (12). Both connectors 2 (12) have sliding sleeves 15 slidably connected to their outer walls. Both sliding sleeves 15 have slots 16 inside. Both connectors 2 (12) have retaining beads 18 slidably connected inside. Both connectors 2 (12) have springs 17 sleeved on their outer walls. The two springs 17 are respectively located inside the two slots 16. Both ends of the two springs 17 are fixedly connected to the two sliding sleeves 15 to provide elastic support and maintain the connection stability between connector 2 (12) and sliding sleeves 15. The retaining beads 18 contact the protruding ring 13 to prevent the connectors from loosening or detaching during use.

[0037] Specifically, when it is necessary to disassemble and assemble the heat sink 5 and the outer shell 2, firstly, by pulling the sliding sleeve 15 on the outer wall of the second connector 12, the sliding sleeve 15 will cause the internal retaining ball 18 to be released, so that the first connector 7 can be easily pulled out from the inside of the second connector 12, making the disassembly process simpler. When it is necessary to reinstall, the operator only needs to pull the sliding sleeve 15, which will compress the internal spring 17. Under the action of compression, the first connector 7 will be reinserted into the retaining ring 14 inside the second connector 12, ensuring a firm connection between the first connector 7 and the second connector 12. After installation, the sliding sleeve 15 is released, the spring 17 will return to its original state and drive the sliding sleeve 15 to reset, so that the retaining ball 18 is re-fixed on the outer wall of the convex ring 13, realizing a firm connection of the connector.

[0038] Working Principle: When heat dissipation is required for the transformer body 3 during the use of this dry-type transformer, the coolant inside the cooling pipe 6 first flows inside the outer casing 2, simultaneously dissipating heat from the transformer body 3 with the heat sink 4 inside the outer casing 2. Then, the cooled coolant, having absorbed heat, is discharged into connector 12 through the output end of cooling pipe 6, and sent into cooling pipe 11 through the input end of connector 12. The coolant circulates within cooling pipe 11, absorbing heat from it through heat sink 8. Finally, the heat above heat sink 8 is dissipated by the cooling fan 9 inside the heat sink 5, thus achieving effective circulating cooling of the transformer body 3. Therefore, when it is necessary to separate and install the heat sink 5 and the outer shell 2, first pull the sliding sleeve 15 on the outer wall of the second connector 12 to release the retaining bead 18 that is stuck on the outer wall of the convex ring 13. At this time, the first connector 7 can be pulled out from the inside of the second connector 12. During installation, by pulling the sliding sleeve 15, the sliding sleeve 15 will compress the internal spring 17. At this time, the first connector 7 is reinserted into the retaining ring 14 inside the second connector 12. Then, the sliding sleeve 15 is released, and the spring 17 releases the force and rebounds, thereby driving the sliding sleeve 15 to reset. During this process, the sliding sleeve 15 squeezes the retaining bead 18, making it stuck on the outer wall of the convex ring 13 to complete the fixation, thereby achieving the effect of facilitating the disassembly and assembly of the heat sink 5 and the outer shell 2.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Dry-type transformer comprising a support frame (1), characterized in that: The support frame (1) top fixed connection has the shell (2), the shell (2) inside is provided with transformer body (3), the shell (2) outside fixed connection has the fin one (4), the support frame (1) top fixed connection has the heat dissipation box (5), the shell (2) inside is provided with heat dissipation assembly; The heat dissipation assembly includes cooling pipe one (6), cooling pipe one (6) is worn in the shell (2) inside, the heat dissipation box (5) inside fixed connection has the fin two (8), the heat dissipation box (5) inside fixed connection has the heat dissipation fan (9), the fin two (8) inside is worn with cooling pipe two (11), and the cooling pipe two (11) output and input are all provided with connecting assembly.

2. A dry-type transformer according to claim 1, characterized in that: The connecting assembly includes two joints two (12) and snap ring (14), two joint two (12) one end is fixedly connected in the cooling pipe two (11) output and input respectively, and two snap ring (14) outer wall is fixedly connected in the joint two (12) inside.

3. A dry-type transformer according to claim 2, characterized in that: The cooling pipe one (6) output and input are all fixedly connected with joint one (7), and two joint one (7) are slidably connected in two joint two (12) inside respectively.

4. A dry-type transformer according to claim 3, characterized in that: Two joint one (7) outer wall is all fixedly connected with convex ring (13), and two joint two (12) outer wall is slidably connected with slide sleeve (15).

5. A dry-type transformer according to claim 4, characterized in that: Two slide sleeves (15) inside are all provided with the air slot (16), and two joint two (12) inside are all slidably connected with the clamping bead (18).

6. A dry-type transformer according to claim 5, characterized in that: Two joint two (12) outer wall is all sleeved with spring (17), and two spring (17) are respectively arranged in two air slots (16) inside.

7. A dry-type transformer according to claim 6, characterized in that: Two spring (17) both ends are all fixedly connected in two slide sleeves (15) inside, and the clamping bead (18) is in contact with the convex ring (13).

8. A dry-type transformer as claimed in claim 1, characterized in that: The heat dissipation box (5) inside is provided with heat dissipation window (10).

Images