Safety temperature control system of distribution transformer

Abstract

The invention belongs to the technical field of transformer temperature control, and particularly relates to a distribution transformer safety temperature control system, which comprises a monitoring module, a temperature control module, an alarm module and an intelligent controller, and is characterized in that a monitoring sensor of the monitoring module is arranged in a box body of a transformer; the temperature control module comprises a cooling plate arranged on the side wall of the box body, transverse cooling fins are evenly arranged on the outer surface of the cooling plate, and cooling gaps are formed in gap areas between the cooling fins. The cooling fan and the water mist supply equipment are started through the temperature control module, cooling water is atomized to form cooling water mist, then the cooling water mist is mixed with flowing cooling air flow to form cooling air flow mixed with a large number of small liquid drops, the cooling air flow is fed into a heat dissipation cavity in the cooling plate through a communication opening, air flow in the heat dissipation cavity is accelerated, and the cooling effect is improved. Therefore, heat in the internal environment of the box body is accelerated to be transferred into the heat dissipation cavity, and the temperature in the box body is effectively controlled while heat transfer is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer temperature control, in particular to a safe temperature control system for a distribution transformer. Background Art

[0002] Smart distribution transformers are new power equipment that deeply integrates traditional distribution transformers with modern sensing, communication, and intelligent control technologies. They are one of the core equipment in the smart grid distribution link. Smart distribution transformers undertake the comprehensive functions of "power conversion, state perception, intelligent regulation, and collaborative interaction" in the distribution network.

[0003] As an important component of the existing power network, smart distribution transformers play an important role in regulating voltage and ensuring power supply in the power network. During this process, iron loss and copper loss in the windings and core inside the transformer during operation will generate a large amount of heat, causing the internal temperature of the transformer to rise rapidly. Excessive temperature can easily increase the probability of damage to internal electronic components, and even cause local overheating, leading to insulation breakdown and power accidents, affecting the normal operation of the entire power network. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a safe temperature control system for distribution transformers.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention proposes a safe temperature control system for a distribution transformer, comprising a monitoring module, a temperature control module, an alarm module and an intelligent controller, wherein the monitoring sensor of the monitoring module is arranged inside the transformer box; The temperature control module includes a cooling plate arranged on the side wall of the box body, and the outer surface of the cooling plate is evenly provided with horizontal heat sinks, and the gap area between the heat sinks forms a heat dissipation gap; A heat dissipation cavity is provided on the side of the cooling plate close to the box body, and a connecting port is provided at the bottom of the heat dissipation cavity, which is connected to the cooling fan and the water mist supply equipment. Heat dissipation grooves are evenly provided on the side wall of the heat dissipation cavity pointing to the heat dissipation gap.

[0006] Preferably, a top plate is transversely arranged on the top of the heat sink, and a bottom plate is transversely arranged on the bottom, and the top plate and the bottom plate respectively seal the top and bottom of the heat dissipation gap.

[0007] Preferably, the end of the heat sink passes through the heat sink and extends into the heat sink cavity, and is fixedly connected to the portion of the box side wall located inside the heat sink cavity; The evenly distributed heat sinks divide the internal area of ​​the heat dissipation cavity into multiple heat dissipation zones. A connecting pipe extends laterally inside the heat dissipation cavity, which is connected to the connecting port. In addition, inflation pipes are respectively provided on the side walls of the connecting pipe at positions corresponding to the bottoms of each heat dissipation zone.

[0008] Preferably, the heat dissipation area is filled with heat-conductive heat dissipation particles, the end of the inflation tube extends upward and passes through the gap between the heat dissipation particles to connect with the top of the heat dissipation area, the side wall of the inflation tube is evenly provided with inflation holes, and the inner wall of the inflation tube is provided with an annular filter.

[0009] Preferably, the heat dissipation particles are bead-shaped and have a smooth surface; the surface of the heat sink located inside the heat dissipation area is smooth, and the surface of the heat sink located in the heat dissipation gap is coated with protective paint.

[0010] Preferably, the top of the inflation tube is connected to the output end of the rotating device provided at the top of the heat dissipation zone, and the bottom of the inflation tube is rotatably connected to the side wall of the connecting tube, and multiple groups of stirring plates are provided on the outer surface of the inflation tube along the vertical direction.

[0011] Preferably, each group of stirring plates is distributed in a ring around the central axis of the inflation tube, and the ends of the stirring plates are bent around the same rotation direction; closing plates are provided on the upper and lower sides of the stirring plates, and a contact area is formed in the area surrounded by the stirring plates and the upper and lower closing plates, and the contact area is connected to the inside of the inflation tube through the impact hole.

[0012] Preferably, the interior of the contact area is located on the curved surface of the stirring plate and is covered with an elastic contact layer, and the impact hole communicates with the interior of the contact layer.

[0013] Preferably, the contact layer is made of a sponge material with a loose porous structure, and the end of the impact hole is communicated with the air guide channel inside the contact layer.

[0014] Preferably, the contact layer is made of elastic filter cloth, and the edge of the contact layer is connected to the curved inner wall surface of the stirring plate, so that the area surrounded by the contact layer and the inner wall of the stirring plate forms an expansion cavity, and the impact hole is connected to the inner area of ​​the expansion cavity.

[0015] The beneficial effects of the present invention are as follows: The safe temperature control system for a distribution transformer described in the present invention starts a cooling fan and a water mist supply device through a temperature control module, atomizes the cooling water to form cooling water mist, and then mixes it with the flowing cooling air flow to form a cooling air flow mixed with a large number of small droplets, and sends the cooling air flow into the heat dissipation cavity inside the cooling plate through a connecting port. After the cooling air flow contacts the inner wall of the heat dissipation cavity, it flows out from the heat dissipation groove on the side wall of the heat dissipation cavity and flows outward along the gap area between the heat sinks; in this process, the air flow inside the heat dissipation cavity is accelerated, thereby accelerating the transfer of heat from the internal environment of the box to the inside of the heat dissipation cavity, realizing heat transfer while effectively controlling the temperature inside the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1It is a perspective view of the present invention; Figure 2 is a partial cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the cooling plate of the present invention after removing the heat sink; Figure 4 This is a schematic diagram of the structure of the heat dissipation cavity inside the cooling plate of the present invention; Figure 5 is a cross-sectional view corresponding to the stirring plate provided in Example 5 of the present invention; Figure 6 This is a cross-sectional view corresponding to the stirring plate provided in Example 6 of the present invention.

[0018] In the figure: box body 1, cooling plate 2, heat sink 21, heat dissipation gap 211, top plate 212, bottom plate 213, heat dissipation cavity 22, connecting port 221, heat dissipation groove 222, heat dissipation area 223, connecting pipe 224, inflation pipe 23, inflation hole 231, stirring plate 232, closing plate 233, contact area 234, impact hole 235, contact layer 24, air guide channel 241, expansion cavity 242. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings shown in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1:

[0021] As shown in the accompanying drawings Figures 1-4 As shown, the present application proposes a distribution transformer safety temperature control system, which includes a monitoring module, a temperature control module, an alarm module and an intelligent controller. The monitoring module includes various built-in sensors, such as temperature, oil level, insulation, vibration, and gas sensors, which are arranged on the transformer box 1 to collect operating data in real time (such as winding temperature, gas content in oil, partial discharge, etc.) and summarize them into the power system intelligent management platform. Combined with the algorithm, the health status of the equipment is analyzed to provide early warning of potential faults (such as insulation aging, overheating, etc.). If the potential risk is too large, an alarm is issued in time. On the one hand, the temperature of the working environment inside the transformer box 1 is controlled by activating the temperature control module, and on the other hand, the inspection personnel are notified to go for maintenance and take corresponding measures to avoid the occurrence of electrical accidents. The temperature control module includes a cooling plate 2 provided on the side wall of the box body 1. The outer surface of the cooling plate 2 is evenly provided with horizontal heat sinks 21. The cooling plate 2 and the heat sinks 21 are both made of metal materials with good thermal conductivity. The gap area between the heat sinks 21 forms a heat dissipation gap 211. The cooling plate 2 is close to a concave area on the surface of one side of the box body 1, and an enclosed area is formed between the inner wall of the concave area and the opposite side wall of the box body 1, which serves as a heat dissipation cavity 22; a connecting port 221 is provided at the bottom of the heat dissipation cavity 22, and the connecting port 221 is connected to the cooling fan and the water mist supply equipment. The water mist supply system includes a cooling water storage tank, an atomizer and a water pump, etc., which participates in controlling the temperature of the box body 1 by atomizing the cooling water to form water mist and mixing it with the cooling airflow generated by the cooling fan, thereby improving the heat dissipation efficiency. Heat dissipation grooves 222 are evenly provided on the side wall of the heat dissipation cavity 22 pointing to the heat dissipation gap 211.

[0022] Specific workflow: As an important component of the existing smart power system, smart distribution transformers play an important role in regulating voltage and ensuring power supply in smart power networks. During this process, iron and copper losses in the windings and cores of the transformers during operation generate a large amount of heat, causing the internal temperature of the transformer to rise rapidly. Excessive temperatures can easily increase the probability of damage to internal electronic components, and even cause local overheating, leading to insulation breakdown and power accidents, affecting the normal operation of the entire power network. Therefore, the present application sets up a monitoring module, which monitors the temperature of the working environment inside the box 1 in real time through a temperature sensor arranged inside the box 1; referring to the existing oil-immersed transformer, the box 1 containing the power components of the oil transformer is filled with cooling oil, and the type of cooling oil adopts a mineral oil type specially used for transformer oil; the cooling oil serves as a heat-conducting medium, and the heat generated by the windings, iron core and other power components inside the transformer box 1 is transferred to the side walls of the box 1 and the cooling plate 2 through the cooling oil, and based on the excellent thermal conductivity, the heat is then directed to the outside through the connected heat sink 21, thereby achieving cooling of the working environment inside the box 1; the side walls of the box 1 and the heat sink 21 can be made of materials with good thermal conductivity, which can better transfer the heat generated inside to the external environment, thereby achieving temperature control of the working environment inside the box 1; When the outside temperature is high and affects the cooling inside the box 1, the cooling fan and the water mist supply device can be started through the temperature control module to atomize the cooling water to form cooling water mist, which is then mixed with the flowing cooling air flow to form a cooling air flow mixed with a large number of small droplets. The cooling air flow is sent into the heat dissipation cavity 22 inside the cooling plate 2 through the connecting port 221. After the cooling air flow contacts the inner wall of the heat dissipation cavity 22, it flows out from the heat dissipation groove 222 on the side wall of the heat dissipation cavity 22 and flows outward along the gap area of ​​the heat sink 21; in this process, the air flow inside the heat dissipation cavity 22 is accelerated, thereby accelerating the transfer of heat from the internal environment of the box 1 to the inside of the heat dissipation cavity 22, realizing heat transfer while effectively controlling the temperature inside the box 1; Moreover, because the cooling water mist enters the heat dissipation cavity 22 along with the air flow, the humidity inside the heat dissipation cavity 22 increases, and the acceleration of the air flow rate also accelerates the absorption of heat by the moisture inside the heat dissipation cavity 22 and its conversion into water vapor. In this process, the heat inside the heat dissipation cavity 22 is absorbed, further accelerating the heat transfer inside the box 1 and improving the cooling efficiency of the transformer power components. When the cooling airflow flows from the heat dissipation slots 222 into the heat dissipation gaps 211 between the outer heat dissipation fins 21, the cooling airflow accelerates the air flow in the heat dissipation gaps 211, thereby improving the heat dissipation efficiency of the heat dissipation fins 21. On the other hand, the water mist remaining in the cooling airflow contacts the heat dissipation fins 21 during the flow through the heat dissipation gaps 211, further absorbing the heat transferred from the surface of the heat dissipation fins 21. While cooling the heat dissipation fins 21, the cooling of the transformer is accelerated, thereby ensuring the normal operation of the transformer under high load conditions. After the cooling operation, the atomizer can be turned off for a period of time to keep the dry cooling airflow flushing the inner wall of the heat dissipation cavity 22 and the heat dissipation gaps 211, removing the residual moisture therein, keeping the above-mentioned parts dry during normal operation, and reducing the impact of water vapor corrosion on the service life of the above-mentioned parts. Compared with the existing technology, the technical solution of the present application utilizes a cooling air flow mixed with water mist to cool the box 1, and the cooling effect is significantly better than the air cooling treatment method using a cooling fan; in addition, compared with the existing technology using water cooling, it is necessary to set up a complex circulating cooling water flow structure with high sealing requirements, and has higher requirements on the surrounding working environment. The technical solution of the present application has a relatively simple and practical structure, can be used in outdoor working environments, and support the normal operation of the smart grid system.

[0023] Example 2:

[0024] On the basis of the first embodiment, a top plate 212 is horizontally provided on the top of the heat sink 21, and a bottom plate 213 is horizontally provided on the bottom. The top plate 212 and the bottom plate 213 seal the top and bottom of the heat dissipation gap 211, and the material of the top plate 212 and the bottom plate 213 is the same as that of the heat sink 21, further expanding the heat dissipation surface of the box 1; The end of the heat sink 21 passes through the heat sink groove 222 and extends into the heat sink cavity 22 and is fixedly connected to the side wall of the box body 1, so that the internal area of ​​the heat sink cavity 22 is divided into multiple heat sink areas 223 by the heat sink 21. A connecting pipe 224 extends horizontally inside the heat sink cavity 22, and the connecting pipe 224 is connected to the connecting port 221. In addition, inflation pipes 23 are respectively provided on the side walls of the connecting pipe 224 at positions corresponding to the bottoms of each heat sink area 223, and the inflation pipes 23 are respectively connected to the corresponding heat sink areas 223.

[0025] Specific workflow: Based on the specific workflow in Example 1, the top and bottom openings of the heat dissipation gap 211 are sealed by the top plate 212 and the bottom plate 213, so that the airflow flowing into the heat dissipation gap 211 is confined in the heat dissipation gap 211 during the flow process and flows laterally along the heat dissipation gap 211, so that the flow path of the cooling airflow that permeates and flows outward is unified and concentrated and coincides with the lateral extension direction of the heat dissipation gap 211. In this way, the contact time between the cooling airflow and the side wall of the heat dissipation gap 211 can be extended, so that the cooling effect of the cooling airflow on the heat sink 211 is concentrated and prolonged, thereby improving the utilization efficiency of the cooling airflow and further improving the cooling efficiency of the transformer; Furthermore, a heat sink 21 is provided to pass through the heat sink 222 and directly extend into the heat sink cavity 22, and is directly fixedly connected to the side wall of the box body 1 in the heat sink cavity 22; so that the cooling airflow penetrates and flows outward from the gap area between the heat sink 222 and the heat sink 21, thereby increasing the contact surface between the cooling airflow and the heat sink 21; and the heat sink 21 distributes the internal area of ​​the heat sink cavity 22, so that when the cooling airflow flows into the heat sink cavity 22 along the connecting pipe 224, it will also be evenly distributed to each heat sink area 223 by the corresponding air filling pipe 23, and in the heat sink area 223 After contacting the surface of the heat sink 21 and the side wall of the box body 1, the heat penetrates and flows out from the gap between the heat sink 222 and the heat sink 21; in this process, the heat sink 21 is fully acted upon by the cooling airflow and the cooling water mist therein, which accelerates the transfer of heat generated by the power components inside the box body 1 to the heat sink 21 and is transmitted to the outside world, thereby improving the cooling efficiency of the box body 1. In addition, the heat dissipation area 223 distributes the cooling airflow and cooling media such as water mist, so that the cooling effect on the side wall of the box body 1 is more uniform, thereby reducing the temperature difference in the box body 1 due to uneven heat dissipation.

[0026] Example 3:

[0027] On the basis of the second embodiment, the heat dissipation area 223 is filled with heat dissipation particles. The heat dissipation particles are made of a material with good thermal conductivity. The heat dissipation particles are in a spherical structure and have a smooth surface. The specific material can be a metal or non-metal material with good thermal conductivity, such as hollow steel balls, aluminum nitride particles or dry silica gel particles mixed with thermal conductive materials. The use of lightweight materials can facilitate the mutual flow of heat dissipation particles and improve the heat conduction efficiency; the end of the inflation tube 23 extends upward and passes through the gap between the heat dissipation particles and is connected to the top of the heat dissipation area 223, and the side wall of the inflation tube 23 is provided with an inflation hole 231; the surface of the heat sink 21 located inside the heat dissipation area 223 is smooth, and the surface of the heat sink 21 located in the heat dissipation gap 211 is coated with protective paint; an annular filter can be provided on the inner wall of the inflation tube 23 to intercept external heat dissipation particles and prevent these heat dissipation particles from penetrating into the interior of the inflation tube 23 through structures such as the inflation hole 231.

[0028] Specific work flow: Based on the specific work flow in Example 2, in order to more effectively transfer the heat generated inside the box body 1 to the outside, heat dissipation particles with good thermal conductivity are filled in the heat dissipation area 223. In this way, the heat dissipation particles are filled in the area between the side wall of the box body 1 and the heat sink 21. In this way, in addition to the direct connection between the heat sink 21 and the side wall of the box body 1, dense heat transfer channels are established through the heat dissipation particles that are in contact with each other. The heat of the side wall of the box body 1 can be transferred to the heat sink 21 and the external environment through the contacting heat dissipation particles, effectively increasing the heat dissipation contact surface; When the cooling airflow flows into the heat dissipation area 223 along the vertical air filling tube 23, and then flows into the gaps between the heat dissipation particles from the evenly distributed air filling holes 231, the cooling airflow flows along the gaps between the heat dissipation particles and takes away the heat transferred from the box body 1. At the same time, because the accumulated heat dissipation particles form a loose and porous structure, the cooling water mist in the cooling airflow is intercepted in the gaps between the heat dissipation particles, which increases the contact time between the cooling water mist and the heat dissipation particles. After being dispersed in the gaps between the heat dissipation particles, the cooling water mist is heated more evenly, fully absorbing the transferred heat and fully absorbing the heat of the heat dissipation particles in the process of converting it into water vapor, thereby cooling the interior of the heat dissipation area 223 and improving the heat dissipation efficiency of the box body 1. Furthermore, the heat dissipation particles are made of a spherical structure, and the surface can also be coated with a hydrophilic material. In this way, when the water mist contacts the surface of the heat dissipation particles, the small droplets in the water mist are more likely to adhere to the smooth surface of the heat dissipation particles to form a liquid film, and then fully absorb the heat of the heat dissipation particles, causing the heat dissipation particles to cool down. The temperature difference further promotes the small droplets in the water mist to adhere to the surface, while also accelerating the heat transfer inside the box 1 to the heat dissipation particles, thereby improving the heat dissipation efficiency; and the impact of the airflow flowing into the heat dissipation area 223 causes the heat dissipation particles inside the heat dissipation area 223 to have a tendency to flow. The heat dissipation particles with a smooth surface and a spherical shape are subject to less resistance to flow, and the wear caused when they contact and slide with the heat sink 21 and the side wall surface of the box 1 is also less. Therefore, the impact of the airflow improves the air cooling efficiency while accelerating the fluidity of the heat dissipation particles, so that the heat dissipation particles close to the box 1 are exchanged with the heat dissipation particles far away from the box 1, thereby accelerating the heat transfer and improving the cooling efficiency of the electrical components inside the box 1.

[0029] Example 4:

[0030] Based on the third embodiment, the top of the inflation tube 23 is connected to the output end of the rotating device provided at the top of the heat dissipation area 223. The rotating device here can be a micro motor device, and the rotating device is controlled by a controller. The bottom of the inflation tube 23 is rotatably connected to the side wall of the connecting tube 224, and an agitating plate 232 is provided on the outer surface of the inflation tube 23 at the gap between the inflation holes 231. The stirring plate 232 extends vertically, and the end of the stirring plate 232 is bent around the same rotation direction; closing plates 233 are provided on the upper and lower sides of the stirring plate 232, and a contact area 234 is formed in the area surrounded by the stirring plate 232 and the upper and lower closing plates 233; the contact area 234 is connected to the interior of the inflation tube 23 through the impact hole 235.

[0031] Specific working process: On the basis of the specific working process in Example 3, in order to accelerate the transfer of heat from the box 1, a rotating connection is set between the inflation pipe 23 and the connecting pipe 224, and the top of the inflation pipe 23 is connected to the output end of the rotating device. In this way, during the cooling process, the rotating device is started to drive the inflation pipe 23 to rotate in the middle position inside the heat dissipation zone 223. In this way, the cooling air flow flowing out of the inflation hole 231 on the inflation pipe 23 is distributed more evenly under the centrifugal effect and the range of action is expanded. At the same time, the inflation pipe 23 drives the stirring plate 232 set on the side wall to rotate, and the rotating stirring plate 232 drives the heat dissipation particles inside the heat dissipation zone 223 while rotating. The horizontal mutual flow is carried out to promote the mutual flow and full exchange of heat dissipation particles between different areas of the heat dissipation zone 223 close to the box body 1 and away from the box body 1. This can promote the heat dissipation particles close to the box body 1 to fully absorb heat, resulting in the transfer of the higher temperature to the area away from the box body 1. Under the action of the flowing cooling airflow and water mist, the heat is quickly cooled, and the heat is transferred to the cooling airflow and the formed water vapor, and is carried out to the outside. In this way, a solid, liquid, and gas-coordinated heat conduction system is formed by the mixture of cooling airflow, cooling water mist, and heat dissipation particles, thereby accelerating the heat transfer of the box body 1 and further improving the cooling efficiency of the power components. Furthermore, the curved stirring plate 232 cooperates with the upper and lower closing plates 233 to form a semi-enclosed contact area 234. The heat dissipation particles close to the box body 1 enter the contact area 234 and move as the inflation tube 23 rotates after being restricted by the encirclement; the cooling fan and the rotating device are controlled to start intermittently. When the rotating device stops, the heat dissipation particles inside the contact area 234 are forced to leave due to inertia and the impact of the cooling air flow flowing out of the impact hole 235. In this way, the heat dissipation particles at different parts use the contact area 234 inside the stirring plate 232 as a carrier to transfer to various parts in the horizontal direction, avoiding local areas When the temperature is too high, the flow exchange of the heat dissipating particles between different areas in the heat dissipating zone 223 is accelerated, and the heat transfer of the box body 1 is accelerated, thereby improving the heat dissipation efficiency of the box body 1; and the heat dissipating particles entering the contact zone 234 come into contact with the contact layer 24 in the semi-enclosed area and are washed by the cooling airflow containing water mist flowing out of the impact hole 235, so that they are cooled separately and fully combined with the water mist in the contact zone 234 to achieve cooling; then, under the action of stirring, they are mixed into the heat dissipating particles in the heat dissipating zone 223, and the above process is continued fully, thereby improving the combination of the cooling airflow and water mist with the heat dissipating particles and further improving the heat dissipation efficiency; Furthermore, considering that when the technical solution of the present application is used in a large transformer, there are more heat dissipation particles filled inside, the stirring plate 232 at the bottom may have a problem of large resistance and difficulty in rotation due to the accumulation and mutual squeezing of the heat dissipation particles. Therefore, on the one hand, heat dissipation particles made of lightweight materials are selected, and on the other hand, a continuous partition can be set between the heat dissipation fins 21 on both sides inside the heat dissipation zone 223. The partition is made of the same material as the heat dissipation fins 21 and is rotatably connected to the inflation tube 23. While expanding the heat dissipation area, the partition is located in the gap between the vertically distributed stirring plates 232, and the heat dissipation zone 223 is divided into different vertically distributed partitions again. The heat dissipation particles are evenly filled into each partition, and the stirring plate 232 only stirs the heat dissipation particles inside a single partition, so that the resistance is small, ensuring sufficient stirring of the heat dissipation particles in the partition.

[0032] Embodiment 5:

[0033] Based on the fourth embodiment, as shown in the accompanying drawings of the specification Figure 5 As shown, there are many possible technical solutions regarding the specific structure of the contact layer 24. Any solution that can evenly distribute the incoming water mist and cooling airflow to the gaps between the incoming heat dissipation particles can be applicable to this application. This embodiment provides a possible technical solution. The contact layer 24 adopts a sponge material with a loose porous structure, and the end of the impact hole 235 is connected to the air guide channel 241 inside the contact layer 24.

[0034] Specific work flow: Based on the specific work flow in Example 4, the incoming cooling air flow flows along the air guide channel 241 into the loose pores inside the contact layer 24, so that the contact layer 24 is moistened. As the stirring plate 232 rotates, the heat dissipation particles enter the contact area 234 and contact the surface of the internal contact layer 24. The sponge-structured and moistened contact layer 24 evenly spreads the absorbed cooling water on the surface of the heat dissipation particles during the process of contacting the surface of the heat dissipation particles, so that the atomized cooling water is in full contact with the heat dissipation particles. Subsequently, due to the inertia of the rotation stop, the heat dissipation particles flow out, and the heat dissipation particles in other parts enter and repeat the above process. In this way, the cooling water formed by the cooling water mist is evenly spread on the surface of the heat dissipation particles, and fully participates in the cooling operation of the box body 1, thereby improving the utilization efficiency of the cooling water mist.

[0035] Example 6:

[0036] Based on the fourth embodiment, as shown in the accompanying drawings of the specification Figure 6As shown, unlike the fifth embodiment, the contact layer 24 structure in this embodiment adopts another different technical solution. The contact layer 24 is made of elastic filter cloth, and the edge of the contact layer 24 is connected to the curved inner wall surface of the stirring plate 232, so that the enclosed area between the contact layer 24 and the inner wall of the stirring plate 232 forms an expansion cavity 242, and the impact hole 235 is connected to the internal area of ​​the expansion cavity 242.

[0037] Specific working process: Based on the specific working process in Example 4, the cooling fan and the rotating device are controlled to start alternately. Specifically, when the rotating device is started, the cooling fan remains closed. At this time, the forward-rotating stirring plate 232 flips the heat dissipation particles, and causes some of the heat dissipation particles to enter the contact area 234 and maintain contact with the contact layer 24 inside the contact area 234; at this time, the contact layer 24 is squeezed and deformed, and the space of the expansion cavity 242 is reduced; when the cooling fan is started to fill the cooling airflow into the expansion cavity 242, the rotating device stops forward rotation, and at the same time, the cooling airflow is filled into the expansion cavity 242, so that the space of the expansion cavity 242 is increased, squeezing the heat dissipation particles inside the contact area 234, and the cooling airflow and water mist also penetrate into the gaps between the mutually squeezed heat dissipation particles along the filter holes on the contact layer 24 and mix with each other; After the rotating device stops for a period of time, it rotates in the opposite direction. The centrifugal action cooperates with the extrusion of the expanded contact layer 24, causing some heat dissipation particles mixed with the cooling water mist to flow out and enter the heat dissipation area 223 and mix into the heat dissipation particles therein. After the rotating device rotates in the opposite direction for a period of time, it stops again, turns off the cooling fan, and then rotates forward again. The heat dissipation particles that have re-entered the contact area 234 squeeze the contact layer 24 again, so that the cooling airflow and water mist remaining in the expansion cavity 242 fully penetrate and flow out, while reducing the volume of the expansion cavity 242. The above-mentioned period of time can be set to 5-8s, which can be set specifically according to actual needs. The start and stop of the rotating device and the cooling fan are controlled by the corresponding intelligent controller, which is controlled by a pre-edited command table. The above process is repeated in this way to fully mix the cooling air flow and water mist into the heat dissipation particles, and promote the heat dissipation particles to be transferred with the help of the stirring plate 232 and the contact area 234, so that the heat dissipation particles inside the heat dissipation area 223 are fully mixed with each other, avoiding uneven heat distribution, resulting in excessive temperature difference and affecting the temperature control of the box 1.

[0038] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A distribution transformer safety temperature control system, comprising a monitoring module, a temperature control module, an alarm module and an intelligent controller, wherein the monitoring sensor of the monitoring module is arranged inside the transformer box (1); Its characteristics are: The temperature control module comprises a cooling plate (2) arranged on a side wall of the box (1); the outer surface of the cooling plate (2) is evenly provided with transverse heat sinks (21); and the gap area between the heat sinks (21) forms a heat dissipation gap (211); A heat dissipation cavity (22) is provided on one side of the cooling plate (2) close to the box body (1); a communication port (221) is provided at the bottom of the heat dissipation cavity (22); the communication port (221) is communicated with a cooling fan and a water mist supply device; and heat dissipation grooves (222) are evenly provided at the portion of the side wall of the heat dissipation cavity (22) pointing to the heat dissipation gap (211).

2. A distribution transformer safety temperature control system according to claim 1, characterized in that: A top plate (212) is transversely arranged on the top of the heat sink (21), and a bottom plate (213) is transversely arranged on the bottom. The top plate (212) and the bottom plate (213) respectively seal the top and bottom of the heat dissipation gap (211).

3. A distribution transformer safety temperature control system according to claim 2, characterized in that: The end of the heat sink (21) passes through the heat dissipation slot (222) and extends into the heat dissipation cavity (22), and is fixedly connected to a portion of the side wall of the box body (1) located inside the heat dissipation cavity (22); The evenly distributed heat sinks (21) divide the inner area of ​​the heat dissipation cavity (22) into a plurality of heat dissipation zones (223) by the heat dissipation fins (21). A connecting pipe (224) extends transversely inside the heat dissipation cavity (22). The connecting pipe (224) is connected to the connecting port (221). In addition, an inflation pipe (23) is provided on the side wall of the connecting pipe (224) at a position corresponding to the bottom of each heat dissipation zone (223).

4. A distribution transformer safety temperature control system according to claim 3, characterized in that: The heat dissipation area (223) is filled with heat-conducting heat dissipation particles. The end of the air filling tube (23) extends upward and passes through the gap between the heat dissipation particles to be connected to the top of the heat dissipation area (223). The side wall of the air filling tube (23) is evenly provided with air filling holes (231). The inner wall of the air filling tube (23) is provided with an annular filter screen.

5. A distribution transformer safety temperature control system according to claim 4, characterized in that: The heat dissipation particles are in a bead-like structure and have a smooth surface; the surface of the heat dissipation fin (21) located inside the heat dissipation area (223) is smooth, and the surface of the heat dissipation fin (21) located in the heat dissipation gap (211) is coated with protective paint.

6. A distribution transformer safety temperature control system according to claim 5, characterized in that: The top of the inflation tube (23) is connected to the output end of the rotating device provided at the top of the heat dissipation zone (223), and the bottom of the inflation tube (23) is rotatably connected to the side wall of the connecting tube (224), and multiple groups of stirring plates (232) are provided on the outer surface of the inflation tube (23) along the vertical direction.

7. A distribution transformer safety temperature control system according to claim 6, characterized in that: Each group of stirring plates (232) is distributed in an annular manner around the central axis of the inflation tube (23), and the ends of the stirring plates (232) are bent around the same rotation direction; closing plates (233) are provided on the upper and lower sides of the stirring plates (232); a contact area (234) is formed in the area surrounded by the stirring plates (232) and the upper and lower closing plates (233); and the contact area (234) is communicated with the interior of the inflation tube (23) through an impact hole (235).

8. A distribution transformer safety temperature control system according to claim 7, characterized in that: The interior of the contact area (234) is located on the curved surface of the stirring plate (232) and is covered with an elastic contact layer (24), and the impact hole (235) is communicated with the interior of the contact layer (24).

9. A distribution transformer safety temperature control system according to claim 8, characterized in that: The contact layer (24) is made of a sponge material with a loose porous structure, and the end of the impact hole (235) is communicated with the air guide channel (241) inside the contact layer (24).

10. A distribution transformer safety temperature control system according to claim 8, characterized in that: The contact layer (24) is made of elastic filter cloth, and the edge of the contact layer (24) is connected to the curved inner wall surface of the stirring plate (232), so that the area surrounded by the contact layer (24) and the inner wall of the stirring plate (232) forms an expansion cavity (242), and the impact hole (235) is connected to the inner area of ​​the expansion cavity (242).

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