Buried transformer and auxiliary heat dissipation assembly thereof

Abstract

The invention discloses a buried transformer and an auxiliary heat dissipation assembly thereof, and relates to the technical field of transformers, the buried transformer comprises a pit, a foundation mounting plate is arranged at the bottom of the pit, a transformer box is arranged at the top of the foundation mounting plate, and heat dissipation fins are arranged on the outer side of the transformer box; a transformer body is arranged in the transformer box, an auxiliary heat dissipation assembly is arranged on the transformer box, a top cover is arranged on the top of the pit, and a power distribution box is arranged on the top of the top cover. According to the invention, the angle of low-temperature gas entering the pit is changed through swinging of a swinging sheet, so that the low-temperature gas is more widely distributed in the pit; the electric telescopic rod drives the push plate unit to quickly move up and down, disturbance to airflow between the cooling fins is increased, the heat exchange area between the cooling fins and low-temperature airflow is increased, dust particles and condensate water on the inner walls of the cooling fins are scraped away in the upward moving process of the push plate unit, and stable heat dissipation of the transformer cooling fins is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, in particular to an underground transformer and an auxiliary heat dissipation component thereof. Background Art

[0002] The underground transformer mainly consists of an underground transformer and an above-ground distribution equipment. The transformer is installed in a pit below the ground and does not occupy above-ground space. The above-ground distribution equipment can be used for public service advertisements, traffic guides or road information, etc.

[0003] The Chinese patent application number CN202111341767.7 discloses a high-efficiency heat dissipation underground transformer, including an oil tank, the front and rear of the oil tank are fixedly connected to a collecting box, a heat dissipation device is provided on the side of the collecting box away from the oil tank, a stirring device is provided on the top of the oil tank, four support columns are fixedly connected to the bottom of the oil tank, the front and rear of the oil tank are connected to an oil pump, the bottom of the oil pump is connected to an oil pipe, the bottom end of the oil pipe is connected to the top of the transformer body, and the inner wall of the oil tank is connected to a pipeline.

[0004] A Chinese patent application with application number CN202310355647.5 discloses a transformer heat dissipation structure, wherein the transformer includes a box body, the box body includes a top wall and a side wall, a water reservoir is provided on the top wall of the box body, the water reservoir is used to store rainwater or natural water, and the transformer heat dissipation structure includes a heat dissipation mechanism, the heat dissipation mechanism is provided on the side wall of the box body, the heat dissipation mechanism includes heat dissipation fins and a drive assembly, and the drive assembly is used to change the angle between the heat dissipation fins and the vertical line. However, during the heat dissipation process of the underground transformer box, the airflow path in and out of the pit is fixed, and the low-temperature gas is not evenly distributed in the pit. Therefore, the transformer box is prone to uneven heat dissipation, which leads to the problem of local excessive temperature in the transformer box.

[0005] In addition, during the heat dissipation process of the transformer box, sand and dust particles will be carried in the air flow. The accumulation of sand and dust particles on the heat sink of the transformer will lead to insufficient heat dissipation of the transformer box. The accumulation of moisture in the pit will also form a temperature difference in the pit, which will produce condensation water on the heat sink of the transformer box, hindering the outward transfer of heat in the transformer box.

[0006] Therefore, an underground transformer and an auxiliary heat dissipation component thereof are proposed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to disclose an underground transformer and an auxiliary heat dissipation component thereof to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an underground transformer, comprising a pit, a basic mounting plate is provided at the bottom of the pit, a transformer box is provided on the top of the basic mounting plate, a heat sink is provided on the outside of the transformer box, a transformer body is provided inside the transformer box, and an auxiliary heat dissipation component is provided on the transformer box.

[0009] Optionally, a top cover is provided on the top of the pit, and a distribution box is provided on the top of the top cover. A high-voltage cable is introduced into the high-voltage side of the transformer box, and a low-voltage cable is led out from the low-voltage side of the transformer box. The low-voltage cable is electrically connected to the distribution box.

[0010] The present invention further discloses an auxiliary heat dissipation assembly as described above, comprising an oscillating assembly and an air pushing assembly, wherein the oscillating assembly is provided with a ventilation pipe, the oscillating assembly comprises a ventilation box, the bottom of the ventilation box is provided with an oscillating groove, and the interior of the ventilation box is rotatably connected to a oscillating piece; The air pushing assembly includes a push plate unit and a lifting unit. The push plate unit corresponds to the heat sink of the transformer. The push plate unit includes a support plate. Electric springs are provided on both sides of the support plate. A movable plate is provided at one end of the electric spring away from the support plate. An elastic bag is provided between the movable plate and the support plate.

[0011] Optionally, a driving part is provided on the ventilation box, and the driving part includes a motor, a driving gear and a synchronous belt. The rotating shaft of the motor is provided with a driving gear, the inner side of the synchronous belt is provided with internal teeth, and the middle part of the pendulum is provided with a rotating shaft. The end of the rotating shaft close to the motor passes through the ventilation box and is provided with a driven gear, and the driven gear is meshed with the internal teeth of the synchronous belt.

[0012] Optionally, the lifting unit includes an electric telescopic rod, a telescopic end of the electric telescopic rod is provided with a lifting plate, and the lifting plate is fixedly connected to the support plate.

[0013] Optionally, a pressure sensor is provided between the telescopic end of the electric telescopic rod and the lifting plate, the electric telescopic rod is a multi-section telescopic rod, and a fixed plate is provided at the fixed end of the electric telescopic rod.

[0014] Optionally, a water immersion sensor is provided in the middle of the upper surface of the elastic bag, the push plate unit corresponds to the gap between two adjacent heat sinks, and the distance between the two adjacent push plate units is equal.

[0015] Optionally, the ventilation pipe includes an air inlet end and an air outlet end, an exhaust fan is provided inside the air outlet end, and a semiconductor cooling plate is provided inside the air inlet end.

[0016] Optionally, when the movable plate is in a retracted state, an arc-shaped groove is formed on the upper surface of the elastic bag, and the elastic bag is made of high-temperature resistant elastic rubber material.

[0017] The technical effects and advantages of the present invention are as follows: 1. The present invention changes the angle of low-temperature gas entering the pit through the swing of the swing plate, so that the low-temperature gas is more widely distributed inside the pit. The electric telescopic rod drives the push plate unit to move up and down quickly, increasing the disturbance of the airflow between the heat sinks, thereby increasing the heat exchange area between the heat sink and the low-temperature airflow outside the heat sink, improving the heat dissipation efficiency of the transformer box, and avoiding the problem of local high temperature of the heat sink.

[0018] 2. The present invention uses an electric spring to drive the movable plate to extend outward and contact the side wall of the heat sink. During the upward movement of the push plate unit, the dust particles and condensed water on the inner wall of the heat sink are scraped off to ensure stable heat dissipation of the transformer heat sink. The push plate unit is moved close to the swing plate by using an electric telescopic rod, and the circulating air flow through the swing plate in the pit is coordinated to remove the dust particles and evaporate and discharge the condensed water.

[0019] 3. After the push plate unit of the present invention removes the condensed water on the heat sink, it cooperates with the lifting unit to move the push plate unit out of the heat sink, and uses the heat dissipation circulating airflow in the pit to evaporate and remove the condensed water collected on the push plate unit. At the same time, the lifting unit is used to make the elastic bag contact with the swing piece, and the dry sand and dust particles on the elastic bag are broken up by the back and forth swinging of the swing piece, and are discharged outward in cooperation with the heat dissipation circulating airflow in the pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the auxiliary heat dissipation component structure of the present invention; Figure 2 A schematic diagram of the structure of the air push assembly of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of area A; Figure 4 Schematic diagram of the lifting unit structure of the present invention; Figure 5 This is a schematic diagram of the bottom structure of the oscillating wind assembly of the present invention; Figure 6 Schematic diagram of the driving structure of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of area B; Figure 8 It is a schematic diagram of the overall structure of the underground transformer of the present invention.

[0021] In the figure: 1. Transformer box; 2. Swing air assembly; 201. Ventilation box; 202. Swing piece; 2021. Rotating shaft; 2022. Driven gear; 203. Driving unit; 2031. Motor; 2032. Driving gear; 2033. Synchronous belt; 3. Air push assembly; 301. Push plate unit; 3011. Support plate; 3012. Electric spring; 3013. Movable plate; 3014. Elastic bag; 302. Lifting unit; 3021. Electric telescopic rod; 3022. Lifting plate; 4. Ventilation pipe; 401. Inlet end; 402. Exhaust end. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein may be combined with each other.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0024] Example 1 See also Figure 1-8 This embodiment discloses an underground transformer, including a basic mounting plate arranged at the bottom of a pit, a transformer box 1 is provided on the top of the basic mounting plate, a heat sink of the transformer is arranged on the outside of the transformer box 1, a transformer body is provided inside the transformer box 1, a top cover is provided on the top of the pit, a distribution box is provided on the top of the top cover, a high-voltage cable is introduced into the high-voltage side of the transformer box 1, a low-voltage cable is led out from the low-voltage side of the transformer box 1, and the low-voltage cable is electrically connected to the distribution box. An auxiliary heat dissipation component is provided on the transformer box 1, and the heat dissipation efficiency of the transformer box 1 in the pit is improved by the auxiliary heat dissipation component.

[0025] The auxiliary heat dissipation component includes a swing wind component 2 and a push wind component 3. The swing wind component 2 is provided with a ventilation pipe 4. The ventilation pipe 4 includes an air inlet end 401 and an exhaust end 402. An exhaust fan is provided inside the exhaust end 402. The exhaust fan continuously discharges the heat emitted by the transformer box 1 in the pit. The low-temperature gas above the ground is replenished into the pit through the air inlet end 401. A semiconductor refrigeration plate is provided inside the air inlet end 401. The semiconductor refrigeration plate is used to cool the gas entering the air inlet end 401, thereby improving the heat dissipation efficiency of the transformer box 1 in the pit.

[0026] The swing assembly 2 includes a ventilation box 201, a swing groove is provided at the bottom of the ventilation box 201, and a swing piece 202 is connected to the internal rotation of the ventilation box 201. A driving part 203 is provided on the ventilation box 201, and the driving part 203 is used to drive the swing piece 202 to swing. The driving part 203 includes a motor 2031, a driving gear 2032 and a synchronous belt 2033. The rotating shaft of the motor 2031 is provided with a driving gear 2032, and the inner side of the synchronous belt 2033 is provided with internal teeth. The middle part of the swing piece 202 is provided with a rotating shaft 2021, and the end of the rotating shaft 2021 close to the motor 2031 passes through the ventilation box 201 and is provided with a driven gear 2022. The driven gear 2022 is meshed with the internal teeth of the synchronous belt 2033. The driving gear 2032 drives multiple driven gears 2022 to rotate synchronously through the synchronous belt 2033, thereby controlling the synchronous rotation of multiple swing pieces 202.

[0027] The air pushing component 3 includes a push plate unit 301 and a lifting unit 302. The push plate unit 301 corresponds to the heat sink of the transformer. The push plate unit 301 corresponds to the gap between two adjacent heat sinks. The distance between two adjacent push plate units 301 is equal. The lifting unit 302 drives the push plate unit 301 to move up and down in the gap between two adjacent heat sinks.

[0028] The push plate unit 301 includes a support plate 3011, electric springs 3012 are provided on both sides of the support plate 3011, a movable plate 3013 is provided at the end of the electric spring 3012 away from the support plate 3011, and an elastic bag 3014 is provided between the movable plate 3013 and the support plate 3011. The distance between the two movable plates 3013 is controlled by the electric spring 3012, and the stretching or contraction state of the elastic bag 3014 is controlled at the same time.

[0029] The lifting unit 302 includes an electric telescopic rod 3021, which is a multi-section telescopic rod. The telescopic end of the electric telescopic rod 3021 is provided with a lifting plate 3022, which is fixedly connected to the support plate 3011. The fixed end of the electric telescopic rod 3021 is provided with a fixing plate, and the end of the fixing plate away from the electric telescopic rod 3021 is fixedly connected to the bottom of the transformer box 1.

[0030] During use, the fan at the exhaust end 402 is started, and the heat emitted by the transformer box 1 in the pit is continuously discharged outward through the exhaust end 402 under the action of the fan suction force, and the gas outside the pit is continuously replenished into the pit through the air inlet end 401. The circulation of air in the pit is used to assist the heat dissipation of the transformer box 1 in the pit. In this process, the semiconductor refrigeration plate inside the air inlet end 401 is energized to cool the air entering the pit, and at the same time, the motor 2031 is used to drive the driving gear 2032 to rotate, and the driving gear 2032, the synchronous belt 2033 and the driven gear 2033 are connected. 22, the rotating shaft 2021 and the pendulum 202 rotate synchronously, and the motor 2031 drives the driving gear 2032 to rotate back and forth in the forward and reverse directions, controlling the pendulum 202 to swing back and forth in the swing groove. During the swinging of the pendulum 202, the flow effect of the gas is enhanced, which promotes the discharge of hot air in the pit and the entry of low-temperature gas. In addition, during the swinging of the pendulum 202, the angle of the low-temperature gas entering the pit can be changed. The back-and-forth swinging of the pendulum 202 makes the low-temperature gas more widely distributed inside the pit, thereby improving the heat dissipation efficiency of the transformer box 1.

[0031] In addition, since the heat sinks of the transformer are close together, the low-temperature airflow has poor fluidity between the heat sinks during the heat dissipation process of the transformer box 1. There are areas between the heat sinks that the low-temperature airflow cannot reach, resulting in the problem of excessively high local temperatures on the heat sinks. To address this, the following improvements are made: When the low-temperature airflow enters the pit, the motor 2031 drives the pendulum 202 to swing back and forth, and at the same time, the electric telescopic rod 3021 drives the lifting plate 3022 and the push plate unit 301 to move up and down rapidly. In the initial state, the two movable plates 3013 in the push plate unit 301 do not come into contact with the heat sink, and do not affect the heat dissipation of the heat sink. In the process of the push plate unit 301 moving up and down rapidly, the disturbance of the airflow between the two heat sinks is increased, so that the low-temperature airflow outside the heat sink repeatedly passes through the gap between the two heat sinks under the drive of the push plate unit 301, thereby enhancing the fluidity of the airflow between the heat sinks, thereby increasing the heat dissipation of the heat sink and avoiding the problem of local high temperature of the heat sink.

[0032] Example 2 See also Figure 1-8 In actual use, due to the presence of dust particles in the pit, during the ventilation and heat dissipation process of the transformer box 1, the ventilation airflow will drive the dust particles to be lifted up, and the dust particles will adhere to the side walls of the heat sink, resulting in insufficient heat dissipation of the transformer box 1 and an increase in the operating temperature of the transformer. The following embodiment 2 is provided to solve the above problem: A pressure sensor is provided between the telescopic end of the electric telescopic rod 3021 and the lifting plate 3022 , and a pressure threshold value P is preset in the pressure sensor.

[0033] During use, there is a gap between the movable plate 3013 and the heat sink. When dust particles accumulate on the heat sink, when the electric telescopic rod 3021 drives the lifting plate 3022 and the push plate unit 301 to move upward, the dust particles accumulated on the heat sink will increase the resistance of the electric telescopic rod 3021 to the upward extension, so that the pressure threshold detected by the pressure sensor reaches P, and then the cleaning of the dust particles on the side wall of the heat sink is started. First, the electric telescopic rod 3021 is retracted and reset, and the push plate unit 301 is driven to move to the bottom of the heat sink by the lifting plate 3022. At this time, the two electric springs 3012 are energized in reverse, and the mutually repulsive force between each turn of the spring in the electric spring 3012 is used to make the electric spring 3012 drive the movable plate 3013 and the heat sink The upper surface of the elastic bag 3014 still maintains a downward curved structure, so that an arc groove is formed on the upper surface of the elastic bag 3014, and then the electric telescopic rod 3021 drives the lifting plate 3022, the support plate 3011, the movable plate 3013 and the elastic bag 3014 to move upward. During the upward movement, the movable plate 3013 maintains contact with the heat sink, and the movable plate 3013 is used to scrape away the dust particles on the side wall of the heat sink. Under the guidance of the arc groove on the upper surface of the elastic bag 3014, the dust particles gather in the middle of the elastic bag 3014. When the upper surface of the elastic bag 3014 moves out of the top of the heat sink, it means that the dust particles on the side wall of the heat sink are cleaned. At the same time, the motor 2031 drives the driving gear 2032 to rotate , the driving gear 2032 drives the driven gear 2022, the rotating shaft 2021 and the pendulum 202 to rotate synchronously through the synchronous belt 2033, adjusts the angle of the pendulum 202, and keeps the pendulum 202 in a vertical state. At this time, the gap between the two adjacent pendulums 202 corresponds to the push plate unit 301, and the electric telescopic rod 3021 continues to drive the push plate unit 301 upward through the lifting plate 3022, so that the upper surface of the elastic bag 3014 of the push plate unit 301 is close to the lower surface of the pendulum 202. At this time, the movable plate 3013 is repeatedly driven to expand and contract by the electric spring 3012, and the air flow continuously attracted outward by the exhaust end 402 is removed to remove the dust particles scraped off the side wall of the heat sink. Specifically, by rapidly increasing the current of the electric spring 3012, The electric spring 3012 utilizes the rapid repulsive force between each turn of the spring to rapidly drive the two movable plates 3013 to move outward. At this time, the outward expansion force of the electric spring 3012 is greater than the elastic force of the electric spring 3012 itself, causing the arc-shaped groove on the upper surface of the elastic bag 3014 to rapidly straighten. The elastic force generated by the straightening of the elastic bag 3014 causes the dust particles located in the middle of the elastic bag 3014 to rapidly bounce upward. At this time, the airflow continuously drawn outward by the exhaust fan inside the exhaust port 402 carries the dust particles that have bounced upward in the middle of the elastic bag 3014 and rapidly discharges them outward. Subsequently, the current in the electric spring 3012 is gradually reduced. Under the action of the contraction force of the electric spring 3012 itself, the upper surface of the elastic bag 3014 contracts again to form an arc-shaped groove.The dust particles on the elastic bag 3014 gather toward the center again. By increasing the current in the electric spring 3012 again, the dust particles in the center of the elastic bag 3014 bounce upward again, completing the removal of the dust particles from the elastic bag 3014. After the dust particles on the elastic bag 3014 are removed, the electric spring 3012 is de-energized. The contraction force of the electric spring 3012 again causes the movable plate 3013 to retract. The electric telescopic rod 3021 drives the push plate unit 301 downward and resets via the lifting plate 3022. The motor 2031 continues to drive the drive gear 2032 to rotate back and forth in the forward and reverse directions, controlling the swing plate 202 to swing back and forth within the swing groove to assist in cooling the pit and transformer box 1.

[0034] Furthermore, due to the high humidity in the pit, when the semiconductor refrigeration sheet is started to dissipate heat for the transformer box 1, the temperature difference between the low-temperature gas cooled by the semiconductor refrigeration sheet and the high-temperature and high-humidity gas in the pit will cause condensation to form on the side wall of the heat sink. When a large amount of condensation forms on the heat sink, it will hinder the effective transfer of heat in the transformer box 1 and affect the heat dissipation performance of the transformer box 1. In this regard, the following improvements are made: A water immersion sensor is provided in the middle of the upper surface of the elastic bag 3014 .

[0035] When the transformer box 1 is ventilated and dissipated, the electric telescopic rod 3021 drives the push plate unit 301 to move up and down through the lifting plate 3022, and in the process of disturbing the airflow between two adjacent heat sinks, when a certain amount of condensed water is formed on the side walls of the heat sink, the elastic bag 3014 will come into contact with the condensed water during the upward movement of the push plate unit 301, and scrape the condensed water away from the side walls of the heat sink. Under the guidance of the arc groove on the upper surface of the elastic bag 3014, the collected condensed water will gather in the middle of the elastic bag 3014. At this time, the water immersion sensor detects the signal of condensed water formation and starts to remove the condensed water. The electric telescopic rod 3021 passes through the lifting plate 302 2 drives the push plate unit 301 to move to the bottom of the heat sink, then reversely energizes the electric spring 3012, and uses the repulsive force between each turn of the spring in the electric spring 3012 to drive the movable plate 3013 to contact the side wall of the heat sink. Then the electric telescopic rod 3021 drives the push plate unit 301 upward through the lifting plate 3022. The movable plate 3013 in the push plate unit 301 scrapes off the condensed water on the side wall of the heat sink, and the arc-shaped groove on the upper surface of the elastic bag 3014 collects the condensed water, completing the removal of the condensed water on the side wall of the heat sink. The circulating air entering the pit gradually evaporates the condensed water on the upper surface of the elastic bag 3014.

[0036] However, when the movable plate 3013 scrapes away the condensed water from the sidewalls of the heat sink, it also scrapes away the dust particles from the sidewalls of the heat sink and mixes them in the arc-shaped grooves on the upper surface of the elastic bag 3014. When the condensed water evaporates, the dust particles dry up on the upper surface of the elastic bag 3014. The dried dust particles occupy the collection space of the elastic bag 3014, causing the condensed water and dust particles to overflow when the elastic bag 3014 subsequently collects them. In response to this, the following improvements have been made: When the elastic bag 3014 completes the collection of condensed water on the side wall of the heat sink, the electric telescopic rod 3021 continues to drive the push plate unit 301 to move upward through the lifting plate 3022. At the same time, the motor 2031 drives the driving gear 2032 to rotate, and the driving gear 2032 drives the driven gear 2022 and the pendulum 202 to rotate synchronously through the synchronous belt 2033, so that the pendulum 202 remains in a vertical state. The upper surface of the elastic bag 3014 in the push plate unit 301 is close to the bottom of the pendulum 202 in the vertical state. At this time, the condensed water accumulated on the elastic bag 3014 is discharged outward through the heat dissipation circulating airflow by controlling the power on and off of the electric spring 3012. Specifically, the reverse current of the electric spring 3012 is first quickly increased. , so that the electric spring 3012 quickly drives the movable plate 3013 to move outward, and the arc-shaped groove on the upper surface of the elastic bag 3014 is quickly straightened. The elastic force generated when the elastic bag 3014 is straightened is used to disperse the condensed water on the upper surface of the elastic bag 3014 into small water droplets under the action of the elastic force of the elastic bag 3014. By cutting off the power to the electric spring 3012, the condensed water is gathered on the upper surface of the elastic bag 3014 again under the action of the contraction force of the electric spring 3012 itself. By repeatedly turning the power on and off the electric spring 3012, the condensed water on the elastic bag 3014 is repeatedly bounced upward in the form of small water droplets. In the process of the small water droplets repeatedly bouncing upward, the airflow continuously drawn outward by the exhaust fan inside the exhaust end 402 carries the small water droplets. The beads are discharged outwards, and the heat dissipation circulating airflow entering the pit is used to dry the elastic bag 3014. At this time, the electric spring 3012 is powered off, and the elastic bag 3014 remains between two adjacent pendulum pieces 202. The motor 2031 drives the driving gear 2032 to rotate, and the driving gear 2032 drives the driven gear 2022 and the pendulum piece 202 to rotate synchronously through the synchronous belt 2033, so that the pendulum piece 202 remains in an inclined state. The electric telescopic rod 3021 drives the push plate unit 301 to move further upwards through the lifting plate 3022, so that the left side of the elastic bag 3014 corresponds to the bottom end of the pendulum piece 202, and then the motor 2031 continues to drive the driving gear 2032 to rotate back and forth in the forward and reverse directions to control the pendulum piece 202 The bottom end of the bag 3014 swings back and forth between the left and right sides of the upper surface of the elastic bag 3014. The arc of rotation of the pendulum 202 corresponds to the arc of the upper surface of the elastic bag 3014. The elastic bag 3014 does not hinder the swing of the pendulum 202. In the process of the pendulum 202 swinging back and forth, the dust particles attached to the upper surface of the elastic bag 3014 are broken up. The broken dust particles are discharged outward with the airflow continuously sucked outward by the exhaust fan inside the exhaust end 402, completing the cleaning of the upper surface of the elastic bag 3014, avoiding the dust particles from drying on the elastic bag 3014 to form dust particle blocks, occupying the collection space in the arc groove of the elastic bag 3014, resulting in affecting the subsequent arc groove's collection of condensed water and dust particles.

[0037] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An underground transformer, comprising a pit, a base mounting plate provided at the bottom of the pit, a transformer box (1) provided on the top of the base mounting plate, a heat sink provided on the outside of the transformer box (1), and a transformer body provided inside the transformer box (1), characterized in that: The transformer box (1) is provided with an auxiliary heat dissipation component.

2. The underground transformer according to claim 1, characterized in that: A top cover is provided on the top of the pit, and a distribution box is provided on the top of the top cover. A high-voltage cable is introduced into the high-voltage side of the transformer box (1), and a low-voltage cable is led out from the low-voltage side of the transformer box (1). The low-voltage cable is electrically connected to the distribution box.

3. An auxiliary heat dissipation assembly according to claim 1, characterized in that: The invention comprises an air swing component (2) and an air push component (3), wherein the air swing component (2) is provided with a ventilation pipe (4), the air swing component (2) comprises a ventilation box (201), a swing groove is provided at the bottom of the ventilation box (201), and a swing plate (202) is rotatably connected to the interior of the ventilation box (201); The air pushing assembly (3) comprises a push plate unit (301) and a lifting unit (302), wherein the push plate unit (301) corresponds to the heat sink of the transformer, and the push plate unit (301) comprises a support plate (3011), electric springs (3012) are provided on both sides of the support plate (3011), a movable plate (3013) is provided at one end of the electric spring (3012) away from the support plate (3011), and an elastic bag (3014) is provided between the movable plate (3013) and the support plate (3011).

4. The auxiliary heat dissipation assembly according to claim 3, characterized in that: The ventilation box (201) is provided with a driving unit (203), the driving unit (203) comprising a motor (2031), a driving gear (2032) and a synchronous belt (2033), the rotating shaft of the motor (2031) being provided with the driving gear (2032), the inner side of the synchronous belt (2033) being provided with internal teeth, the middle part of the swing plate (202) being provided with a rotating shaft (2021), the end of the rotating shaft (2021) close to the motor (2031) passing through the ventilation box (201) and being provided with a driven gear (2022), the driven gear (2022) being meshed with the internal teeth of the synchronous belt (2033).

5. The auxiliary heat dissipation assembly according to claim 3, characterized in that: The lifting unit (302) comprises an electric telescopic rod (3021), a telescopic end of the electric telescopic rod (3021) is provided with a lifting plate (3022), the lifting plate (3022) is fixedly connected to the support plate (3011), a pressure sensor is provided between the telescopic end of the electric telescopic rod (3021) and the lifting plate (3022), the electric telescopic rod (3021) is a multi-section telescopic rod, and a fixed plate is provided at the fixed end of the electric telescopic rod (3021).

6. The auxiliary heat dissipation assembly according to claim 3, characterized in that: A water immersion sensor is provided in the middle of the upper surface of the elastic bag (3014), the push plate unit (301) corresponds to the gap between two adjacent heat sinks, and the distance between the two adjacent push plate units (301) is equal.

7. The auxiliary heat dissipation assembly according to claim 3, characterized in that: The ventilation pipe (4) comprises an air inlet end (401) and an air outlet end (402); an exhaust fan is provided inside the air outlet end (402); and a semiconductor cooling plate is provided inside the air inlet end (401).

8. The auxiliary heat dissipation assembly according to claim 3, characterized in that: When the movable plate (3013) is in a contracted state, an arc-shaped groove is formed on the upper surface of the elastic bag (3014), and the elastic bag (3014) is made of high-temperature resistant elastic rubber material.

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