Heat dissipation protection device of dry-type isolation transformer for high-temperature-resistant experiment

Abstract

The utility model relates to the technical field of dry-type isolation transformers, in particular to a dry-type isolation transformer heat dissipation protection device for a high-temperature-resistant experiment, which comprises a protection shell, a cold air mechanism, a fire extinguishing mechanism and a monitoring mechanism, the protective shell sleeves the transformer body, an air inlet is formed in the top of the protective shell, an air outlet is formed in the bottom of the protective shell, and the cold air mechanism is arranged at the air inlet; the air inlet and the air outlet are each provided with a detachable filtering piece and a heat dissipation shutter capable of being opened and closed. The fire extinguishing mechanism is arranged in the protective shell; the monitoring mechanism comprises a temperature sensor, a smoke sensor and a controller, the temperature sensor and the smoke sensor are both arranged in the protective shell, and the controller is electrically connected with the heat dissipation shutter, the temperature sensor, the smoke sensor, the cold air mechanism and the fire extinguishing mechanism; the device has the characteristics of efficient heat dissipation, intelligent protection, safety and reliability.

Description

Technical Field

[0001] This utility model relates to the technical field of dry-type isolation transformers, and in particular to a heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments. Background Technology

[0002] High-temperature resistance testing is an environmental testing method that exposes test products to high-temperature environments to assess their performance, reliability, and tolerance under high-temperature conditions. It is primarily used to evaluate whether products will experience performance degradation, malfunctions, or damage under high-temperature storage, operation, or transportation scenarios. It is widely used in product development, quality testing, and reliability verification processes across multiple industries, including electronics, electrical engineering, aerospace, automotive, and chemical engineering. The experiment utilizes a dry-type isolation transformer connected to the test chamber. This ensures experimental safety, stable equipment operation, and accurate temperature control through its electrical isolation, voltage stabilization, and anti-interference characteristics, while also leveraging the safety features of the dry-type structure to adapt to the experimental environment.

[0003] Dry-type isolation transformers generate a large amount of heat during operation. If this heat cannot be dissipated effectively and in a timely manner, the internal temperature of the transformer will become too high, leading to insulation aging, performance degradation, and even failure. This may also affect the stability and safety of high-temperature experimental environments. Existing heat dissipation methods are divided into natural air cooling and forced air cooling. Given the importance of heat dissipation for dry-type isolation transformers, existing heat dissipation protection devices need to be improved. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a heat dissipation and protection device for a high-temperature experimental dry-type isolation transformer, which has the characteristics of efficient heat dissipation, intelligent protection and safety and reliability.

[0005] This utility model discloses a heat dissipation and protection device for a high-temperature experimental dry-type isolation transformer, comprising a protective shell, a cooling mechanism, a fire extinguishing mechanism, and a monitoring mechanism. The protective shell is fitted over the transformer body, with an air inlet at the top and an air outlet at the bottom. The cooling mechanism is located at the air inlet. Both the air inlet and the air outlet are equipped with removable filters and openable heat dissipation louvers. The fire extinguishing mechanism is located inside the protective shell. The monitoring mechanism includes a temperature sensor, a smoke sensor, and a controller. The temperature sensor and the smoke sensor are both located inside the protective shell, and the controller is electrically connected to the heat dissipation louvers, the temperature sensor, the smoke sensor, the cooling mechanism, and the fire extinguishing mechanism, respectively.

[0006] As a preferred embodiment of this utility model, the cooling mechanism includes a cooling box, a first fan, and a semiconductor refrigeration chip; the top of the cooling box is connected to an air inlet pipe, the bottom is connected to an air outlet pipe, and the end of the air outlet pipe is connected to the air inlet; the first fan is disposed inside the cooling box; the semiconductor refrigeration chip is attached to the cooling box, with its cold end facing the cooling box and its hot end provided with heat dissipation fins.

[0007] As a preferred embodiment of this utility model, a second fan is provided on the outer side of the heat dissipation fins.

[0008] As a preferred embodiment of this utility model, the cold air box is provided with staggered baffles.

[0009] As a preferred embodiment of this utility model, the cold air box is provided with flow equalization plates arranged in a trapezoidal pattern with unequal spacing.

[0010] As a preferred embodiment of this utility model, the fire extinguishing mechanism includes a fireproof box, a storage tank, a delivery pump, a delivery pipe, and a nozzle; the fireproof box is set inside the protective shell, the storage tank and the delivery pump are both set inside the fireproof box, the inlet of the delivery pump is connected to the storage tank, the outlet is connected to the delivery pipe, the delivery pipe extends to the top of the inside of the protective shell, and the nozzle is connected to the delivery pipe.

[0011] As a preferred embodiment of this utility model, the storage tank contains a fire extinguishing agent, which is a dry powder fire extinguishing agent or a carbon dioxide fire extinguishing agent.

[0012] As a preferred embodiment of this utility model, the protective shell includes, from the outside to the inside, a heat insulation layer, a thermal insulation layer, and a fireproof layer.

[0013] Compared with existing technologies, this utility model achieves comprehensive heat dissipation protection for dry-type isolation transformers by setting up a protective shell, a cooling mechanism, a fire extinguishing mechanism, and a monitoring mechanism. The protective shell's top air inlet and bottom air outlet use detachable filters and openable / closable heat dissipation louvers to ensure airflow while preventing debris from entering. Furthermore, the protective shell's heat insulation layer, thermal insulation layer, and fireproof layer enhance safety. In the cooling mechanism, a first fan, in conjunction with a semiconductor cooling chip, baffles, and flow equalization plates, effectively cools the air entering the protective shell, improving heat dissipation efficiency. The fire extinguishing mechanism, upon detecting anomalies by the temperature and smoke sensors in the monitoring mechanism, activates a delivery pump via a controller, spraying extinguishing agent through delivery pipes and nozzles for rapid fire response. The monitoring mechanism monitors the internal environment in real time and, through the controller, links other mechanisms to intelligently control the heat dissipation louvers, cooling mechanism, and fire extinguishing mechanism, ensuring efficient heat dissipation and stable operation of the dry-type isolation transformer under high-temperature experimental conditions, effectively preventing malfunctions caused by excessive temperature, and improving safety and reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0016] Figure 3 yes Figure 2A schematic diagram of the cross-sectional structure of section AA in the middle;

[0017] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure of the middle BB section;

[0018] Figure 5 This is a schematic diagram of the structure of the protective shell of this utility model;

[0019] The attached diagram is labeled as follows: 1. Protective shell; 11. Air inlet; 12. Air outlet; 13. Filter; 14. Heat dissipation louvers; 15. Insulation layer; 16. Thermal insulation layer; 17. Fireproof layer; 2. Cooling mechanism; 21. Cooling box; 211. Air inlet pipe; 212. Air outlet pipe; 22. First fan; 23. Semiconductor cooling chip; 24. Heat dissipation fins; 25. Second fan; 26. Baffle plate; 27. Flow equalization plate; 3. Fire extinguishing mechanism; 31. Fireproof box; 32. Storage tank; 33. Delivery pump; 34. Delivery pipe; 35. Nozzle; 4. Monitoring mechanism; 41. Temperature sensor; 42. Smoke sensor; 43. Controller. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Reference Figures 1-3This embodiment provides a heat dissipation and protection device for a high-temperature experimental dry-type isolation transformer, including a protective shell 1, a cooling air mechanism 2, a fire extinguishing mechanism 3, and a monitoring mechanism 4. The protective shell 1 has an air inlet 11 at the top and an air outlet 12 at the bottom, forming an air circulation channel. Combined with the cooling air mechanism 2 at the air inlet 11, this achieves air circulation, thereby removing the heat generated during transformer operation. Removable filters 13 are installed at both the air inlet 11 and the air outlet 12 to prevent dust and other impurities from entering the protective shell 1, thus avoiding affecting the normal operation of the transformer and its mechanisms. Openable and closable heat dissipation louvers 14 can be controlled by an electric actuator to regulate the airflow. The fire extinguishing mechanism 3 is located inside the protective shell 1 and is used to extinguish fires promptly in the event of a fire hazard, ensuring safety. The monitoring mechanism 4 includes a temperature sensor 41, a smoke sensor 42, and a controller 43. The temperature sensor 41 and smoke sensor 42 are both housed within the protective enclosure 1, and multiple sensors can be installed in different locations. The controller 43 is electrically connected to the heat dissipation louvers 14, the temperature sensor 41, the smoke sensor 42, the cooling mechanism 2, and the fire extinguishing mechanism 3. Through the temperature sensor 41 and smoke sensor 42, the controller monitors the environment inside the protective enclosure 1 in real time. Based on the monitoring data, the controller intelligently controls the operation of each component, achieving efficient heat dissipation and safety protection for the dry-type isolation transformer. In practical applications, the protective enclosure 1 is fitted over the main body of the dry-type isolation transformer, forming a relatively enclosed protective space. During operation, when the temperature sensor 41 detects that the temperature inside the protective enclosure 1 is too high, the controller 43 controls the heat dissipation louvers 14 to open and simultaneously activates the cooling mechanism 2 for heat dissipation. If the smoke sensor 42 detects smoke, it controls the heat dissipation louvers 14 and the cooling mechanism 2 to close, and simultaneously controls the fire extinguishing mechanism 3 to activate fire extinguishing, thus solving the heat dissipation and safety protection problems of the dry-type isolation transformer in high-temperature experimental environments.

[0023] Reference Figure 3The cooling mechanism 2 includes a cooling box 21, a first fan 22, and a thermoelectric cooler 23. The top of the cooling box 21 is connected to an air inlet pipe 211 for drawing in outside air; the bottom is connected to an air outlet pipe 212, the end of which connects to an air inlet 11 to deliver air into the protective shell 1. The first fan 22 is located inside the cooling box 21 and accelerates the airflow within it. The cooling box 21 can be made of a metal material with good thermal conductivity, such as aluminum, to quickly conduct cooling. The thermoelectric cooler 23 is attached to the cooling box 21, with its cold end facing the cooling box 21, cooling the air entering the cooling box 21; its hot end is equipped with heat dissipation fins 24 to dissipate the heat generated by the hot end of the thermoelectric cooler 23. The heat dissipation fins 24 can be made of copper or aluminum, which have high thermal conductivity, to improve heat dissipation. During operation, outside air enters the cold air box 21 through the air inlet pipe 211. The first fan 22 accelerates the flow of air in the cold air box 21. The cold end of the semiconductor cooling chip 23 cools the air. The cooled air enters the protective shell 1 through the air outlet pipe 212 from the air inlet 11 and exchanges heat with the heated transformer body to reduce the transformer temperature.

[0024] It is understandable that when hot outside air enters the cold air box 21 through the air inlet pipe 211 and comes into contact with the cold end of the semiconductor cooling chip 23, condensation easily occurs due to the high temperature and moisture content of the hot air. If this condensate enters the protective enclosure 1, it may come into contact with the dry-type isolation transformer, causing serious problems such as short circuits and decreased insulation performance, threatening the normal operation and service life of the transformer. Therefore, the filter element 13 at the air inlet 11 can filter dust and impurities from the air and also has good water filtration performance. Through hydrophobic materials and structural design, it can effectively intercept moisture and prevent it from entering the protective enclosure 1 with the air and damaging the transformer. At the same time, the detachable design facilitates regular cleaning and maintenance of the filter element 13. When the moisture or impurities adsorbed by the filter element 13 reach a certain level and affect the water filtration effect, it can be disassembled and replaced in time to ensure that the filter element 13 continues to perform its efficient water filtration and filtering functions, providing a dry and clean operating environment for the dry-type isolation transformer.

[0025] To further improve the heat dissipation efficiency of the hot end of the semiconductor cooling chip 23, refer to Figure 3 A second fan 25 is provided on the outside of the heat dissipation fins 24, facing the heat dissipation fins 24. In actual operation, after the second fan 25 is started, it can accelerate the air flow speed and enhance the heat dissipation effect of the heat dissipation fins 24, thereby ensuring the cooling efficiency of the semiconductor cooling chip 23 and ensuring that the cold air mechanism 2 can continuously and stably provide low-temperature air to the protective shell 1, ensuring the heat dissipation needs of the dry-type isolation transformer in the high-temperature experimental environment.

[0026] To prolong the residence time of air in the cold air box 21, refer to Figure 3 The air cooling box 21 is equipped with staggered baffles 26. The baffles 26 can be made of the same metal material as the air cooling box 21 to ensure its strength and corrosion resistance, and to facilitate installation and fixation. The baffles 26 cause the air entering the air cooling box 21 from the air inlet pipe 211 to flow in a tortuous path under the guidance of the baffles 26. By constantly changing direction during the flow, the contact time and contact area between the air and the cold end of the thermoelectric cooler 23 are increased, so as to fully absorb the cold energy of the cold end of the thermoelectric cooler 23, and then the air is output from the air outlet pipe 212, thereby improving the cooling effect of the air.

[0027] To optimize the uniformity of cold air distribution flowing out of the cold air box 21, refer to Figure 3 The air cooling box 21 is equipped with trapezoidal flow equalization plates 27 arranged at unequal intervals. The flow equalization plates 27 can be made of the same metal material as the air cooling box 21 to ensure its strength and corrosion resistance, and to facilitate installation and fixation. The arrangement of the flow equalization plates 27 causes the cold air to change direction under the guidance of the flow equalization plates 27 during the flow process, realizing the flow distribution in the Z and X directions, thereby realizing the flow distribution of cold air in the air outlet pipe 212; together with the heat dissipation louvers 14 installed at the air outlet 12, the cold air can be distributed more evenly in the air cooling box 21.

[0028] Reference Figure 3 and Figure 4 The fire extinguishing mechanism 3 includes a fire-resistant enclosure 31, a storage tank 32, a delivery pump 33, a delivery pipe 34, and nozzles 35. The fire-resistant enclosure 31 is housed within the protective shell 1. Both the storage tank 32 and the delivery pump 33 are located within the fire-resistant enclosure 31. The fire-resistant enclosure 31 is made of fire-resistant materials, such as rock wool board or fire-resistant ceramic fiber board, to isolate the fire source and protect the storage tank 32 and the delivery pump 33. The delivery pipe 34 and nozzles 35 are made of high-temperature and high-pressure resistant metal or plastic. The inlet of the delivery pump 33 is connected to the storage tank 32, and the outlet is connected to the delivery pipe 34. Multiple nozzles 35 are arranged along the delivery pipe 34. When the smoke sensor 42 detects smoke inside the protective shell 1 and determines that a fire may occur, the controller 43 controls the delivery pump 33 to start, delivering the extinguishing agent from the storage tank 32 through the delivery pipe 34 to the top of the protective shell 1, where it is then sprayed out by the nozzles 35 to extinguish the fire. This allows for a rapid response and effective extinguishing of the fire in its early stages, improving safety.

[0029] The storage tank 32 contains extinguishing agents, which can be either dry powder or carbon dioxide. Both dry powder and carbon dioxide extinguishing agents have good extinguishing performance. Dry powder extinguishing agents extinguish fires by covering the surface of the burning material to isolate oxygen, while carbon dioxide extinguishing agents extinguish fires by reducing the oxygen concentration and through a cooling effect. Both are suitable for electrical fires, can quickly and safely extinguish fires, and cause less damage to transformers and experimental equipment.

[0030] Furthermore, referring to Figure 5 The protective shell 1 has a multi-layer structure, consisting of a heat insulation layer 15, a thermal insulation layer 16, and a fireproof layer 17, from the outside in. The heat insulation layer 15 can be made of materials with good heat insulation properties, such as glass wool or polyurethane foam, effectively preventing the transfer of high external temperatures into the protective shell 1 and reducing interference with the transformer's heat dissipation. The thermal insulation layer 16 uses materials with excellent thermal insulation properties, such as polystyrene foam board, to maintain a relatively stable temperature inside the protective shell 1, preventing excessive temperature fluctuations from affecting the transformer's performance. The fireproof layer 17 uses materials with excellent fire resistance, such as fireproof gypsum board or fireproof fiberglass cloth, which can prevent the spread of fire in the event of a fire, buying time for firefighting and protecting the transformer and surrounding equipment. Through this multi-layer structure design, the protective shell 1 possesses excellent heat insulation, thermal insulation, and fireproof performance, providing a stable and safe operating environment for the dry-type isolation transformer. It also reduces the impact of ambient temperature changes on the performance of the transformer's heat dissipation protection device, extending the device's service life.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments, characterized in that, The system includes a protective shell (1), a cooling mechanism (2), a fire extinguishing mechanism (3), and a monitoring mechanism (4). The protective shell (1) is fitted onto the outside of the transformer body. The protective shell (1) has an air inlet (11) at the top and an air outlet (12) at the bottom. The cooling mechanism (2) is located at the air inlet (11). The air inlet (11) and the air outlet (12) are equipped with detachable filters (13) and openable heat dissipation louvers (14). The fire extinguishing mechanism (3) is located inside the protective shell (1). The monitoring mechanism (4) includes a temperature sensor (41), a smoke sensor (42), and a controller (43). The temperature sensor (41) and the smoke sensor (42) are both located inside the protective shell (1). The controller (43) is electrically connected to the heat dissipation louvers (14), the temperature sensor (41), the smoke sensor (42), the cooling mechanism (2), and the fire extinguishing mechanism (3), respectively.

2. The heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments as described in claim 1, characterized in that, The cooling mechanism (2) includes a cooling box (21), a first fan (22) and a semiconductor refrigeration chip (23); the top of the cooling box (21) is connected to an air inlet pipe (211) and the bottom is connected to an air outlet pipe (212), and the end of the air outlet pipe (212) is connected to the air inlet (11); the first fan (22) is disposed inside the cooling box (21); the semiconductor refrigeration chip (23) is attached to the cooling box (21), with its cold end facing the cooling box (21) and its hot end provided with heat dissipation fins (24).

3. The heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments as described in claim 2, characterized in that, A second fan (25) is provided on the outside of the heat dissipation fins (24).

4. The heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments as described in claim 2, characterized in that, The cold air box (21) is provided with staggered baffles (26).

5. The heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments as described in claim 2, characterized in that, The cold air box (21) is equipped with flow equalization plates (27) arranged in a trapezoidal pattern with unequal spacing.

6. The heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments as described in claim 1, characterized in that, The fire extinguishing mechanism (3) includes a fireproof box (31), a storage tank (32), a delivery pump (33), a delivery pipe (34), and a nozzle (35). The fireproof box (31) is located inside the protective shell (1). The storage tank (32) and the delivery pump (33) are both located inside the fireproof box (31). The inlet of the delivery pump (33) is connected to the storage tank (32), and the outlet is connected to the delivery pipe (34). The delivery pipe (34) extends to the top of the interior of the protective shell (1). The nozzle (35) is connected to the delivery pipe (34).

7. The heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments as described in claim 6, characterized in that, The storage tank (32) contains a fire extinguishing agent, which is either a dry powder fire extinguishing agent or a carbon dioxide fire extinguishing agent.

8. The heat dissipation and protection device for a dry-type isolation transformer used in high-temperature experiments as described in claim 1, characterized in that, The protective shell (1) includes, from the outside to the inside, a heat insulation layer (15), a thermal insulation layer (16), and a fireproof layer (17).

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