Air cooling device for high-capacity dry-type power transformer

Abstract

The utility model discloses an air cooling device for a high-capacity dry-type power transformer, and relates to the field of power transformers. An air cooling device for a high-capacity dry-type power transformer comprises a device frame winding. The winding is fixedly mounted in the device frame; a split box door is arranged on the front surface of the device frame; a ventilation opening is formed in one side of the device frame; the inner side of the ventilation opening is connected with a ventilation pipeline; the whole ventilation pipeline is designed to be S-shaped; the ventilation pipeline penetrates through the device frame, and a ventilation fan is arranged in the end, on the inner side of the device frame, of the ventilation pipeline. The ventilation fan is rotationally connected with the ventilation pipeline; a dust filtering plate is arranged at a higher turning part in the ventilating pipeline; the device is provided with a ventilation fan and a dust filtering plate, so that when the device is used, external air and internal air can be circulated through the ventilation fan, the internal cooling efficiency is improved, and meanwhile, external dust can be prevented from entering the device to influence internal elements.

Description

Technical Field

[0001] The utility model relates to the technical field of power transformers, in particular to an air cooling device for a large-capacity dry-type power transformer. Background Art

[0002] Large-capacity dry-type power transformers are high-voltage transformers used in power transmission and distribution systems, mainly used for voltage conversion and voltage regulation. Compared with oil-immersed transformers, dry-type transformers do not require the use of insulating oil, so they are more environmentally friendly and safer. Large-capacity dry-type power transformers usually have larger capacity and rated power, and are suitable for large industrial and commercial power sites; due to their large capacity, the rate of heat generation during use is also large;

[0003] For example, the Chinese patent with the announcement number CN220710071U discloses a transformer air cooling device, including a cabinet, a foot support is fixedly connected to the bottom of the cabinet, a heat dissipation port is opened on one side surface of the cabinet, a cabinet door is movably connected to the surface of the cabinet, a wind cooling mechanism is arranged on the surface of the cabinet door, a bracket is fixedly connected to the inside of the cabinet, a transformer is fixedly installed on the surface of the bracket, a heat dissipation fin is fixedly connected to the surface of one side surface of the transformer, and a moisture-proof mechanism is arranged on the surface of the bracket;

[0004] The above scheme has the following problems: the device is set up with a moisture-proof mechanism during use. When the device is running, the desiccant in the storage box will provide a certain degree of moisture-proof to the inside of the device. At the same time, the storage box is pulled out of the sliding slot by the handle, and then the desiccant is replaced to keep the inside of the device from being damp. However, the device cannot dissipate the internal heat during use. Excessive heat will cause high-temperature damage to internal components and affect work efficiency. In severe cases, it may cause a fire.

[0005] Therefore, we propose a large-capacity dry-type power transformer air cooling device to solve the above-mentioned problems. Utility Model Content

[0006] The utility model aims to provide a large-capacity dry-type power transformer air cooling device to solve the problem of low internal cooling efficiency of large-capacity dry-type transformers in the current market proposed by the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-capacity dry-type power transformer air cooling device, including a device frame winding; the winding is fixedly installed inside the device frame; a double-opening door is arranged on the front of the device frame; a vent is opened on one side of the device frame; a ventilation duct is connected to the inner side of the vent; the ventilation duct is designed in an S shape as a whole; the ventilation duct runs through the device frame, and a ventilation fan is arranged inside one end of the ventilation duct on the inner side of the device frame; the ventilation fan is rotatably connected to the ventilation duct; an ash filter plate is arranged at a higher turning point inside the ventilation duct; the ash filter plate is fixedly installed inside the ventilation duct and arranged at the front end of the ventilation fan; the ash filter plate is tilted inside the ventilation duct; an ash gathering port is opened on the wall of the ventilation duct just below the ash filter plate; the ash gathering port is fixedly connected to the ash collecting duct below; the lower end of the ash collecting duct is connected to the dust collecting chamber.

[0008] As an optimal technical solution of the utility model, an air cooling component is provided on the top of the device frame; the air cooling component is communicated with the inside of the device frame; the air cooling component is connected to the fan at the bottom of the device frame through a pipeline; the fan is fixedly installed at the bottom of the device frame.

[0009] As a preferred technical solution of the utility model, a base is arranged below the device frame; the device frame and the base are connected via a shock-absorbing bracket; the shock-absorbing bracket is fixedly connected to the device frame and the base.

[0010] As an optimal technical solution of the present utility model, a temperature detection device is provided on the inner wall of the device frame; the temperature detection device is in the same plane as the inner opening of the ventilation duct; the temperature detection device is electrically connected to the control panel; and the control panel is fixedly mounted on the outer wall of the device frame.

[0011] As a preferred technical solution of the utility model, a plurality of heat dissipation holes are evenly arranged on the box door.

[0012] As a preferred technical solution of the present utility model, the control panel is electrically connected to the air cooling component and the fan.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The device is provided with a ventilation fan and an ash filter plate. When in use, the ventilation fan is started to allow external air to flow into the device frame through the ventilation duct. During the flow, dust in the air adheres to the ash filter plate under the influence of the internal structure design of the ventilation duct, preventing dust from entering the device with the circulating airflow and causing damage to the components. The dust attached to the ash filter plate falls downward under the action of gravity, falls into the ash collecting duct through the ash gathering port, and is collected through the ash collecting duct. The funnel at the gathering port is designed to prevent dust from flowing into the ventilation duct with the air under the action of the ventilation fan, so that the device can circulate external air and internal air through the ventilation fan when in use, thereby increasing the internal cooling efficiency and preventing external dust from entering the device and affecting the internal components.

[0015] 2. The device is provided with a control panel and a shock-absorbing bracket. The operation of the fan and the air-cooling component is controlled by the control panel to cool the inside of the device. During the air-cooling process, the device as a whole will vibrate and generate noise due to the influence of the rotation of the air-cooling component. The vibration of the device as a whole is buffered by the shock-absorbing bracket to reduce the noise. The internal temperature of the device can be detected by a temperature detection device electrically connected to the control panel. According to the different detected temperatures, the control panel transmits different electrical signals to the fan and the air-cooling component to control the start and stop of the fan and the air-cooling component, so that the start and stop of the internal air-cooling device can be automatically controlled during use, thereby improving the utilization rate of the air-cooling device of the device and reducing energy loss. At the same time, it can prevent the occurrence of problems such as frost on the surface of internal components due to long-term startup of the air-cooling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the top view structure of the utility model;

[0019] Figure 4 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the main part of the utility model.

[0021] In the figure: 1. Device frame; 2. Base; 3. Shock-absorbing bracket; 4. Winding; 5. Air-cooling component; 6. Temperature detection device; 7. Control panel; 8. Fan; 9. Box door; 10. Heat dissipation hole; 11. Ventilation fan; 12. Ash filter plate; 13. Ventilation duct; 14. Air vent; 15. Ash collection port; 16. Dust collection chamber; 17. Ash collection duct. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] See also Figure 1-5 The utility model provides a technical solution: a large-capacity dry-type power transformer air cooling device, comprising a device frame 1 and a winding 4; the winding 4 is fixedly installed inside the device frame 1; a double-opening door 9 is arranged on the front of the device frame 1; a vent 14 is opened on one side of the device frame 1; a ventilation duct 13 is connected to the inner side of the vent 14; the ventilation duct 13 is designed in an S shape as a whole; the ventilation duct 13 runs through the device frame 1, and a ventilation fan 11 is arranged inside the ventilation duct 13 at one end inside the device frame 1; the ventilation fan 11 is rotatably connected to the ventilation duct 13; an ash filter plate 12 is arranged at a higher turning point inside the ventilation duct 13; the ash filter plate 12 is fixedly installed inside the ventilation duct 13 and is arranged at the front end of the ventilation fan 11; the ash filter plate 12 is tilted inside the ventilation duct 13; the ventilation duct 1 directly below the ash filter plate 12 3 A dust collecting port 15 is provided at the tube wall; the lower part of the dust collecting port 15 is fixedly connected to the dust collecting pipe 17; the lower end of the dust collecting pipe 17 is connected to the dust collecting chamber 16; firstly, the winding 4 is installed inside the device frame 1, and the box door 9 is closed during use. During use, the ventilation fan 11 inside the ventilation pipe 13 is used to connect the external air with the air inside the device frame 1, and the external air enters the ventilation pipe 13 through the ventilation port 14, and the ventilation pipe 13 transports the air to the inside of the device frame 1 to increase the air cooling efficiency; during the air circulation process, the dust in the air is adsorbed and filtered by the dust filter plate 12 to prevent the dust from entering the device, and the adsorbed dust falls into the child dust collecting pipe 17 through the dust collecting port 15 under the action of gravity and the vibration generated by the rotation of the air cooling component 5, and the dust is collected centrally through the dust collecting chamber 16.

[0024] The top of the device frame 1 is provided with an air cooling assembly 5; the air cooling assembly 5 is connected to the inside of the device frame 1; the air cooling assembly 5 is connected to the fan 8 at the bottom of the device frame 1 through a pipeline; the fan 8 is fixedly installed at the bottom of the device frame 1; a temperature detection device 6 is provided on the inner wall of the device frame 1; the temperature detection device 6 is in the same plane as the inner opening of the ventilation duct 13; the temperature detection device 6 is electrically connected to the control panel 7; the control panel 7 is fixedly installed on the outer wall of the device frame 1; a plurality of heat dissipation holes 10 are evenly opened on the box door 9; the control panel 7 is electrically connected to the air cooling assembly 5 and the fan 8; the temperature is detected by the control panel 7 The upper limit and lower limit of the detection device 6 are set. When the internal temperature of the device frame 1 exceeds the upper limit, the control panel 7 transmits an electrical signal to the fan 8 and the air cooling component 5, so that the fan 8 and the air cooling component 5 start to cool the inside of the device frame 1. When the internal temperature drops to the lower limit, the control panel 7 transmits an electrical signal to the fan 8 and the air cooling component 5 again to control them to shut down. During the operation of the ventilation fan 11, the internal hot air is transported to the outside through the heat dissipation holes 10 to improve the overall heat dissipation performance of the device. The vibration generated during the operation of the air cooling component 5 is buffered by the shock-absorbing bracket 3 between the base 2 and the device frame 1 to reduce noise.

[0025] Working principle: When using the air cooling device for a large-capacity dry-type power transformer, first install the winding 4 inside the device frame 1, close the box door 9 during use, and set the upper limit and lower limit of the temperature detection device 6 through the control panel 7. When the temperature inside the device frame 1 exceeds the upper limit, the control panel 7 transmits an electrical signal to the fan 8 and the air cooling component 5, so that the fan 8 and the air cooling component 5 start to air-cool the inside of the device frame 1. When the internal temperature drops to the lower limit, the control panel 7 transmits an electrical signal to the fan 8 and the air cooling component 5 again to control them to shut down; during use, the ventilation fan 11 inside the ventilation duct 13 allows the external air to communicate with the air inside the device frame 1, and the external air The air enters the ventilation duct 13 through the vent 14, and the ventilation duct 13 transports the air to the inside of the device frame 1 to increase the air cooling efficiency; during the air circulation process, the dust in the air is adsorbed and filtered by the ash filter plate 12 to prevent the dust from entering the inside of the device, and the adsorbed dust falls into the ash collection duct 17 through the ash collection port 15 under the action of gravity and the vibration generated by the rotation of the air-cooling component 5, and the dust is collected in the dust collection chamber 16; during the operation of the ventilation fan 11, the internal hot air is transported to the outside through the heat dissipation holes 10 to improve the overall heat dissipation performance of the device; the vibration generated during the operation of the air-cooling component 5 is buffered by the shock-absorbing bracket 3 between the base 2 and the device frame 1 to reduce noise.

[0026] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A large-capacity dry-type power transformer air cooling device, comprising a device frame (1) and a winding (4); the winding (4) is fixedly installed inside the device frame (1); and a double-opening box door (9) is provided on the front of the device frame (1); Features: A ventilation opening (14) is provided on one side of the device frame (1); a ventilation duct (13) is connected to the inner side of the ventilation opening (14); the ventilation duct (13) is designed to be S-shaped as a whole; the ventilation duct (13) passes through the device frame (1), and a ventilation fan (11) is provided inside the ventilation duct (13) at one end inside the device frame (1); the ventilation fan (11) is rotatably connected to the ventilation duct (13); an ash filter plate (12) is provided at a higher turning point inside the ventilation duct (13); the ash filter plate (12) is fixedly installed inside the ventilation duct (13) and is arranged at the front end of the ventilation fan (11); the ash filter plate (12) is designed to be inclined inside the ventilation duct (13); an ash collection port (15) is provided on the pipe wall of the ventilation duct (13) directly below the ash filter plate (12); the ash collection port (15) is fixedly connected to a ash collection pipe (17) below; the lower end of the ash collection pipe (17) is connected to a dust collection chamber (16).

2. The large-capacity dry-type power transformer air cooling device according to claim 1 is characterized in that: An air cooling component (5) is arranged on the top of the device frame (1); the air cooling component (5) is communicated with the inside of the device frame (1); the air cooling component (5) is connected to the fan (8) at the bottom of the device frame (1) through a pipeline; the fan (8) is fixedly installed at the bottom of the device frame (1).

3. The large-capacity dry-type power transformer air cooling device according to claim 1 is characterized in that: A base (2) is arranged below the device frame (1); the device frame (1) and the base (2) are connected via a shock-absorbing bracket (3); the shock-absorbing bracket (3) is fixedly connected to the device frame (1) and the base (2).

4. The large-capacity dry-type power transformer air cooling device according to claim 1 is characterized in that: A temperature detection device (6) is provided on the inner wall of the device frame (1); the temperature detection device (6) and the inner opening of the ventilation duct (13) are in the same plane; the temperature detection device (6) is electrically connected to the control panel (7); and the control panel (7) is fixedly mounted on the outer wall of the device frame (1).

5. The large capacity dry-type power transformer air cooling device according to claim 1 is characterized in that: The box door (9) is evenly provided with a plurality of heat dissipation holes (10).

6. The large capacity dry-type power transformer air cooling device according to claim 4 is characterized in that: The control panel (7) is electrically connected to the air cooling component (5) and the fan (8).

Images