Overload protection device for distribution transformer of low-voltage distribution line

Abstract

The invention provides an overload protection device for a distribution transformer of a low-voltage distribution line, and belongs to the technical field of transformers, the overload protection device comprises a box body A, the box body A is connected with a box body B through a plug-in assembly, the outer wall of the box body A is fixedly connected with a water collecting tank, and the inner wall of the box body B is fixedly connected with a water collecting hopper. The outer walls of the box body A and the box body B are symmetrically and fixedly connected; and the cooling assembly comprises a pump fixedly connected to the outer wall of the box body A, a water outlet of the pump is fixedly connected with an output pipe, a water inlet of the pump is fixedly connected with an input pipe, and the input pipe is fixedly connected with the water collecting tank. According to the invention, the box body A and the box body B are quickly spliced, mounted and dismounted through the arranged plug-in assembly, so that the transportation and the inspection, maintenance and other operations of all parts in the device on site are facilitated, and the overall structural design enables the mounting and maintenance process to be more efficient and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to an overload protection device for a distribution transformer of a low-voltage distribution line. Background Art

[0002] The transformer is mainly composed of two parts: the iron core and the winding. The iron core is generally made of stacked silicon steel sheets, and its function is to provide a low magnetic resistance path for the magnetic flux and enhance the effect of electromagnetic induction; the winding is usually divided into a primary winding and a secondary winding. The primary winding is connected to the AC power supply, and the secondary winding outputs the transformed electrical energy. The winding is generally made of copper or aluminum wire with good conductivity. Transformers often face many risks such as external collisions, damage by small animals, erosion by wind, sand and rain, and accidental touch by people. These factors can easily damage them, affect normal operation, and even cause safety accidents. Therefore, shells are often installed to enhance the protection of transformers. There is still an overload risk during the operation of distribution transformers. The existing overload protection technology mainly monitors the current size of the transformer through current transformers. The current transformer is installed on the input or output line of the transformer, collects current data in real time and transmits it to the controller. When it is detected that the current exceeds the preset overload threshold, the controller will start the protection action. Common protection actions include disconnecting the input or output circuit of the transformer to prevent excessive current from continuing to pass through the transformer and avoid the winding from burning due to overheating. However, the existing overload protection device has certain limitations. In some complex distribution environments, such as when there is harmonic interference or instantaneous current shock, misjudgment is prone to occur. When the overload situation lasts for a long time, even if the circuit is cut off, a large amount of heat will accumulate inside the transformer.

[0003] In low-voltage distribution lines, distribution transformers often face many problems. 1. Existing transformers have different specifications and sizes. When installing transformers, transformers of different sizes need to be matched for installation, which has high production costs; 2. Transformers are greatly affected by ambient temperature, and traditional heat dissipation methods are inefficient at high temperatures; 3. Transformers are significantly affected by ambient temperature during operation. In high-temperature environments, the heat dissipation burden of transformers increases, and heat is difficult to dissipate in time, which can easily cause internal components to overheat. In particular, the existing transformers are overloaded for a long time, and the heat inside the transformer accumulates quickly, affecting insulation performance and accelerating aging; at low temperatures, the viscosity of transformer oil increases, and components become brittle, which will hinder normal startup and operation.

[0004] Therefore, there is an urgent need for an overload protection device for a distribution transformer of a low-voltage distribution line to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an overload protection device for a distribution transformer of a low-voltage distribution line to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: An overload protection device for a distribution transformer of a low-voltage distribution line comprises a box body A, wherein the box body A is connected to a box body B through a plug-in assembly, a water collecting box is fixedly connected to the outer wall of the box body A, a water collecting bucket is fixedly connected to the inner wall of the box body B, a water outlet trough is provided on the outer wall of the box body A, and further comprises: The dustproof electric fan is symmetrically fixed to the outer walls of the box A and the box B; A cooling component, the cooling component includes a pump fixedly connected to the outer wall of the box body A, the water outlet of the pump is fixedly connected to an output pipe, the water inlet of the pump is fixedly connected to an input pipe, and the input pipe is fixedly connected to a water collecting tank, the end of the output pipe away from the water outlet of the pump passes through the box body A and is fixedly connected to a water pipe A, the outer wall of the water pipe A is fixedly connected to uniformly distributed condensing pipes, and the condensing pipes are fixedly connected to the box body A, and the outer wall of the condensing pipes is fixedly connected to a water pipe B; The heating pipe is evenly and fixedly connected to the inner wall of the box body B, and the heating pipe cooperates with the cooling component; The adjustment installation component is arranged on the inner wall of the box body A and the box body B.

[0007] As a preferred technical solution of the present application, the plug-in assembly includes a main connecting block and a secondary connecting block which are symmetrically fixedly connected to the outer walls of box body A and box body B, the outer wall of the secondary connecting block is fixedly connected with a ratchet plate, and the ratchet plate is slidably connected to the main connecting block, the inner wall of the main connecting block is slidably connected with a card block, and the outer wall of the card block is abutted against the outer wall of the ratchet plate, the inner wall of the card block is slidably connected with symmetrically distributed pulling blocks, the outer wall of the pulling block is fixedly connected with a connecting rod, the end of the connecting rod away from the pulling block is fixedly connected with a pull rod, the outer wall of the connecting rod is slidably connected with a limiting plate, and the limiting plate is fixedly connected to the main connecting block.

[0008] As a preferred technical solution of the present application, the adjustment and installation assembly includes a fixing plate symmetrically fixedly connected to the inner walls of box A and box B, a symmetrically distributed guide plate symmetrically fixedly connected between the fixing plates, a symmetrically distributed guide block slidably connected to the outer wall of the guide plate, a bidirectional screw threadedly connected to the inner wall of the guide block, and the bidirectional screw is rotatably connected to the fixing plate, a knob fixedly connected to the outer wall of the bidirectional screw, a symmetrically distributed linkage plate rotatably connected to the outer wall of the guide block, and a positioning frame rotatably connected to the end of the linkage plate away from the guide block.

[0009] As a preferred technical solution of the present application, the outer wall sleeve of the pull rod is provided with a strong spring, the outer wall sleeve of the connecting rod is provided with a strong spring, and one end of the strong spring is fixedly connected to the limit plate, and the other end of the strong spring away from the limit plate is fixedly connected to the clamping block.

[0010] As a preferred technical solution of the present application, the outer wall of the positioning frame is slidably connected with symmetrically distributed guide rods, and the guide rods are fixedly connected to the box A and the box B.

[0011] As a preferred technical solution of the present application, the outer walls of the condenser tube and the heating tube are fixedly connected with an isolation plate, and the box body A and the box body B are fixedly connected with the isolation plate.

[0012] As a preferred technical solution of the present application, a transformer body is symmetrically arranged between the positioning frames.

[0013] As a preferred technical solution of the present application, a water flow channel is provided between the heating tube and the box body B, and between the condensing tube and the box body A, and the water flow channel is connected to the water outlet trough.

[0014] As a preferred technical solution of the present application, a temperature sensor A is fixedly connected to the inner wall of the box A, and a temperature sensor B is fixedly connected to the inner wall of the box B.

[0015] As a preferred technical solution of the present application, the inner walls of the box A and the box B are both provided with evenly distributed ventilation holes.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of this application: 1. The installation and fixation of the transformer is facilitated by setting the adjustment installation assembly, which can adapt to transformers of different specifications and sizes, improve the versatility of the device, and when the transformer needs to be overhauled, replaced or other maintenance operations in the future, the positioning frame can be adjusted more conveniently to disassemble and reinstall the transformer, which reduces the difficulty and workload of maintenance, facilitates the assembly and disassembly of the device, and solves the problem in the prior art that the existing transformers have different specifications and sizes, and when the transformer housing is installed, it is necessary to match transformers of different sizes for installation, which has high production costs; 2. By setting a dust-proof electric fan to change the direction, box A and box B act as an air inlet box and an air outlet box respectively, thereby realizing ventilation and heat dissipation of the transformer body 31 inside the box. While the dust-proof electric fan promotes ventilation and heat dissipation, water flows through the inside of the condenser. The water uses recycled rainwater collected in the water collecting tank as the water source of the condenser, which reduces the consumption of water resources. Rainwater is used for heat exchange in the condenser to assist in cooling, and there is no need to consume a large amount of additional electricity for cooling. The cooperation of the two enables the entire device to effectively control energy consumption while ensuring the temperature regulation function of the transformer body 31, realize energy-saving operation, reduce the waste of electric power resources, and solve the problem in the prior art that the transformer is greatly affected by the ambient temperature and the traditional heat dissipation method is inefficient at high temperatures.

[0017] 3. The temperature sensor A and the temperature sensor B are set to monitor the internal temperature of the box in real time and realize accurate temperature feedback. The box A is a heating box and the box B is a cooling box. The two boxes cooperate with each other to ensure that the transformer body 31 is always operated in a suitable temperature range to avoid overload and overheating damage caused by excessive temperature, or low temperature affecting its performance and startup. The stable operation of the transformer body 31 is guaranteed and its service life is extended. The problem that the transformer is significantly affected by the ambient temperature during operation in the prior art is solved. In a high temperature environment, the heat dissipation burden of the transformer is increased, and the heat is difficult to dissipate in time, which may cause overheating of internal components. In particular, the existing transformer is overloaded for a long time, and the heat inside the transformer accumulates rapidly, affecting the insulation performance and accelerating aging; at low temperatures, the viscosity of the transformer oil increases, the components become brittle, etc., which will hinder the normal startup and operation.

[0018] 4. Box A and box B can be quickly spliced, installed and disassembled through the provided plug-in components, which facilitates transportation and on-site inspection and maintenance of the internal components of the device. The overall structural design makes the installation and maintenance process more efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of the overload protection device for the distribution transformer of the low-voltage distribution line provided in this application; Figure 2 A schematic diagram of the internal structure of the overload protection device of the low-voltage distribution line distribution transformer provided in this application; Figure 3 A schematic diagram of the structure of the water collecting bucket part of the overload protection device of the distribution transformer of the low-voltage distribution line provided in this application; Figure 4 A schematic diagram of the structure of the water outlet portion of the overload protection device of the distribution transformer of the low-voltage distribution line provided in this application; Figure 5 A schematic diagram of the structure of the ventilation opening portion of the overload protection device of the distribution transformer of the low-voltage distribution line provided in this application; Figure 6 A cross-sectional view of a secondary connection block of an overload protection device for a distribution transformer of a low-voltage distribution line provided in the present application; Figure 7 A cross-sectional view of a card block of an overload protection device for a distribution transformer of a low-voltage distribution line provided in the present application; Figure 8 A schematic diagram of the structure of the heating tube portion of the overload protection device of the low-voltage distribution line distribution transformer provided in this application; Fig. 9 A cross-sectional view of the box B of the overload protection device for the low-voltage distribution line distribution transformer provided in this application; Fig.10A schematic diagram of the structure of the transformer body of the overload protection device of the distribution transformer of the low-voltage distribution line provided in this application; Fig.11 A schematic diagram of the structure of the positioning frame portion of the overload protection device of the distribution transformer of the low-voltage distribution line provided in this application.

[0020] Indicated in the figure: 1. Box A; 2. Box B; 3. Secondary connecting block; 4. Main connecting block; 5. Ratchet plate; 6. Block; 7. Pull rod; 8. Connecting rod; 9. Strong spring; 10. Dust-proof electric fan; 11. Pump; 12. Output pipe; 13. Input pipe; 14. Water collecting bucket; 15. Water collecting tank; 16. Heating pipe; 17. Condenser; 18. Isolation plate; 19. Water outlet; 20. Ventilation port; 21. Water pipe A; 22. Water pipe B; 23. Guide rod; 24. Positioning frame; 25. Fixing plate; 26. Bidirectional screw; 27. Guide plate; 28. Guide block; 29. ​​Linkage plate; 30. Knob; 31. Transformer body; 32. Temperature sensor A; 33. Temperature sensor B; 34. Pull block; 35. Water channel; 36. Limit plate. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0022] like Figure 1-Figure 11 As shown, the present embodiment proposes an overload protection device for a low-voltage distribution line distribution transformer, comprising a box body A1, the box body A1 is connected to a box body B2 through a plug-in assembly, a water collecting box 15 is fixedly connected to the outer wall of the box body A1, a water collecting bucket 14 is fixedly connected to the inner wall of the box body B2, a water outlet trough 19 is provided on the outer wall of the box body A1, and further comprising: The dustproof electric fan 10 is symmetrically fixedly connected to the outer walls of the box A1 and the box B2; A cooling component includes a pump 11 fixedly connected to the outer wall of the box A1, an output pipe 12 is fixedly connected to the water outlet of the pump 11, an input pipe 13 is fixedly connected to the water inlet of the pump 11, and the input pipe 13 is fixedly connected to the water collecting tank 15, an end of the output pipe 12 away from the water outlet of the pump 11 passes through the box A1 and is fixedly connected to a water pipe A21, an outer wall of the water pipe A21 is fixedly connected to uniformly distributed condensing pipes 17, and the condensing pipes 17 are fixedly connected to the box A1, and a water pipe B22 is fixedly connected to the outer wall of the condensing pipe 17, the box A1 and the box B2 monitor the temperature of the transformer body 31 through the temperature sensor A32 and the temperature sensor B33 respectively, when the temperature in the box A1 and the box B2 rises, the temperature sensor A32 and the temperature sensor B3 3 senses the temperature change, and the temperature exceeds the set appropriate temperature value, and starts the pump 11. The water in the water collecting tank 15 enters the pump 11 through the input pipe 13, and then the pump 11 transports the water to the water pipe A21 through the output pipe 12. The water then flows into the condenser 17 evenly distributed in the box A1 and fixedly connected to the box A1. The water flows in the condenser 17 to take away the heat, so as to cool the internal space of the box A1 and the box B2. The water after heat exchange flows out through the water pipe B22 and may eventually be discharged from the device and recycled. At the same time, the dustproof electric fan 10 rotates to promote the circulation of air inside and outside the box A1 and the box B2, accelerate the heat dissipation, and further enhance the cooling effect. At this time, the dustproof electric fan 10 on the box A1 takes air inward, and the box B2 The dustproof electric fan 10 on the cabinet A1 draws air outward. When the temperature inside the cabinet A1 and the cabinet B2 is low, that is, lower than the set suitable temperature value, the temperature sensor A32 and the temperature sensor B33 sense it, start the heating tube 16, and the heating tube 16 starts to heat up, heating the internal space of the cabinet A1 and the cabinet B2 to make the ambient temperature inside the cabinet A1 and the cabinet B2 reach the range suitable for the operation of the transformer body 31. The heating tube 16 cooperates with the cooling component, which means that it can flexibly switch between cooling and heating operations according to the actual temperature conditions to maintain a relatively stable temperature environment inside the cabinet. At this time, the dustproof electric fan 10 on the cabinet B2 takes in air, and the dustproof electric fan 10 on the cabinet A1 discharges air. When the transformer body 1 is overloaded, the overload will cause current Too much heat is generated, that is, the inside of the transformer body 1 and the boxes A1 and B2 will quickly accumulate heat. At this time, the temperature sensor A32 and the temperature sensor B33 can not only monitor the temperature during normal operation, but also monitor the internal heat accumulation in real time after overload occurs. If the heat accumulation causes the temperature to continue to rise and exceeds the set warning value, the cooling component will increase its work intensity, the pump 11 will increase the pumping speed, increase the water flow in the condenser 17, and the speed of the dustproof electric fan 10 will also increase accordingly, quickly taking away the heat to prevent the windings, iron core and other components inside the transformer from being further damaged due to excessive heat accumulation, such as accelerated aging of the insulation layer and decreased performance of the iron core, thereby effectively reducing the risk of overheating failure caused by overload.Prolong the service life of the transformer body 1 and ensure the stable power supply of the low-voltage distribution line; The heating tube 16 is evenly and fixedly connected to the inner wall of the box B2, and the heating tube 16 cooperates with the cooling component; The adjustment installation assembly is arranged on the inner walls of the box A1 and the box B2.

[0023] like Figure 6-7 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the plug-in assembly includes a main connection block 4 and a secondary connection block 3 symmetrically fixedly connected to the outer walls of the box body A1 and the box body B2, the outer wall of the secondary connection block 3 is fixedly connected with a ratchet plate 5, and the ratchet plate 5 is slidably connected to the main connection block 4, the inner wall of the main connection block 4 is slidably connected with a card block 6, and the outer wall of the card block 6 is against the outer wall of the ratchet plate 5, the inner wall of the card block 6 is slidably connected with a symmetrically distributed pulling block 34, the outer wall of the pulling block 34 is fixedly connected with a connecting rod 8, and the end of the connecting rod 8 away from the pulling block 34 is fixedly connected with a pull rod 7, the outer wall of the connecting rod 8 is slidably connected with a limit plate 36, and the limit plate 3 6 is fixedly connected to the main connecting block 4, and the connection between the box A1 and the box B2 is realized by the plug-in assembly. The ratchet plate 5 on the outer wall of the auxiliary connecting block 3 slides with the main connecting block 4, and the clamping block 6 slides on the inner wall of the main connecting block 4 and abuts against the outer wall of the ratchet plate 5. Under the action of the strong spring 9, the clamping block 6 can stabilize and clamp the ratchet plate 5, so that the box A1 and the box B2 are tightly connected. When disassembly is required, pull the pull rod 7, and the pull rod 7 drives the pulling block 34 through the connecting rod 8, and then pulls the clamping block 6 to overcome the elastic force of the strong spring 9, so that the clamping block 6 is separated from the ratchet plate 5, and the box A1 and the box B2 can be separated. The elastic force of the strong spring 9 is much greater than the gravity of the clamping block 6.

[0024] like Figure 10-11As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the adjustment installation assembly includes a fixing plate 25 symmetrically fixedly connected to the inner wall of the box body A1 and the box body B2, a symmetrically distributed guide plate 27 is fixedly connected between the symmetrical fixing plates 25, a symmetrically distributed guide block 28 is slidably connected to the outer wall of the guide plate 27, a bidirectional screw 26 is threadedly connected to the inner wall of the guide block 28, and the bidirectional screw 26 is rotatably connected to the fixing plate 25, a knob 30 is fixedly connected to the outer wall of the bidirectional screw 26, a symmetrically distributed linkage plate 29 is rotatably connected to the outer wall of the guide block 28, and one end of the linkage plate 29 away from the guide block 28 is rotatably connected to a positioning The frame 24 uses an adjustable mounting assembly to fix the transformer body 31. Specifically, the knob 30 is turned, and the knob 30 drives the bidirectional screw 26 to rotate. Since the bidirectional screw 26 is rotatably connected to the fixing plate 25 and its outer wall is threadedly matched with the guide block 28, under the guiding action of the guide plate 27 on the guide block 28, the two guide blocks 28 will move in opposite directions. The guide block 28 drives the positioning frame 24 to slide along the guide rod 23 through the linkage plate 29, so that the distance between the two positioning frames 24 can be adjusted to adapt to transformer bodies 31 of different sizes, and stably fix them at appropriate positions in the box A1 and the box B2.

[0025] like Figure 7 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a strong spring 9 is provided on the outer wall of the connecting rod 8, and one end of the strong spring 9 is fixedly connected to the limit plate 36, and the other end of the strong spring 9 away from the limit plate 36 is fixedly connected to the block 6, and the strong spring 9 is used to realize that the block 6 is automatically clamped into the ratchet plate 5.

[0026] like Fig.10 As shown, as a preferred embodiment, based on the above method, further, the outer wall of the positioning frame 24 is slidably connected with symmetrically distributed guide rods 23, and the guide rods 23 are fixedly connected to the box A1 and the box B2, and the guide rods 23 provide directional support force for the movement of the positioning frame 24.

[0027] like Figure 2 and Figure 8 As shown, as a preferred embodiment, on the basis of the above method, further, the outer walls of the condenser tube 17 and the heating tube 16 are fixedly connected with an isolation plate 18, and the box A1 and the box B2 are fixedly connected with the isolation plate 18, and the isolation plate 18 realizes the sealing of the connection between the box A1 and the box B2.

[0028] like Figure 2 As shown, as a preferred implementation, on the basis of the above-mentioned implementation, further, a transformer body 31 is arranged between the symmetrical positioning frames 24 , and the transformer body 31 is installed and fixed by the positioning frames 24 .

[0029] like Fig. 9As shown, as a preferred embodiment, on the basis of the above method, further, a water flow channel 35 is provided between the heating tube 16 and the box B2, and between the condensing tube 17 and the box A1, and the water flow channel 35 is connected to the water outlet trough 19, and rainwater flows into the water flow channel 35 through the water collecting bucket 14, and finally flows into the water collecting tank 15.

[0030] like Figure 5 As shown, as a preferred embodiment, based on the above method, further, the inner wall of box A1 is fixedly connected with a temperature sensor A32, and the inner wall of box B2 is fixedly connected with a temperature sensor B33, and the internal temperature of the equipment is detected by the temperature sensor A32 and the temperature sensor B33.

[0031] like Figure 5 As shown, as a preferred embodiment, on the basis of the above method, further, the inner walls of the box A1 and the box B2 are both provided with evenly distributed ventilation holes 20, through which the hot air or cold air is easily transported to the space formed by the box A1 and the box B2.

[0032] Specifically, when the overload protection device of the distribution transformer of the low-voltage distribution line is in use: the transformer body 31 is fixed by using the adjusting installation assembly. Specifically, the knob 30 is turned, and the knob 30 drives the bidirectional screw 26 to rotate. Since the bidirectional screw 26 is rotatably connected with the fixing plate 25 and its outer wall is threadedly matched with the guide block 28, under the guiding action of the guide plate 27 on the guide block 28, the two guide blocks 28 will move in opposite directions. The guide block 28 drives the positioning frame 24 to slide along the guide rod 23 through the linkage plate 29, so that the spacing between the two positioning frames 24 can be adjusted to adapt to transformer bodies 31 of different sizes, and stably fix them in appropriate positions in the box A1 and the box B2; the box A is realized by the plug-in assembly. 1 and box B2, the ratchet plate 5 on the outer wall of the secondary connection block 3 slides with the main connection block 4, the clamping block 6 slides on the inner wall of the main connection block 4 and abuts against the outer wall of the ratchet plate 5, under the action of the strong spring 9, the clamping block 6 can stabilize and clamp the ratchet plate 5, so that the box A1 and the box B2 are tightly connected. When disassembly is required, the pull rod 7 is pulled, and the pull rod 7 drives the pulling block 34 through the connecting rod 8, and then the clamping block 6 is pulled to overcome the elastic force of the strong spring 9, so that the clamping block 6 is separated from the ratchet plate 5, and the box A1 and the box B2 can be separated; the box A1 and the box B2 respectively monitor the temperature of the transformer body 31 through the temperature sensor A32 and the temperature sensor B33. When the temperature inside the box A1 and the box B2 rises, the temperature sensor A32 and the temperature sensor B33 are connected. The temperature sensor B33 senses the temperature change. When the temperature exceeds the set suitable temperature value, the pump 11 is started. The water in the water collecting tank 15 enters the pump 11 through the input pipe 13, and the pump 11 then transports the water to the water pipe A21 through the output pipe 12. The water then flows into the condenser 17 which is evenly distributed in the box A1 and fixedly connected to the box A1. The water flows in the condenser 17 to take away the heat, so as to cool the internal space of the box A1 and the box B2. The water after the heat exchange flows out through the water pipe B22 and may eventually be discharged out of the device and recycled. At the same time, the dustproof electric fan 10 rotates to promote the circulation of air inside and outside the box A1 and the box B2, accelerate the heat dissipation, and further enhance the cooling effect. At this time, the dustproof electric fan on the box A1 10 takes in air inwards, and the dustproof electric fan 10 on the box B2 draws air outwards; when the temperature in the boxes A1 and B2 is low, that is, lower than the set suitable temperature value, the temperature sensor A32 and the temperature sensor B33 sense it, start the heating tube 16, and the heating tube 16 starts to heat up, heating and raising the temperature of the internal space of the boxes A1 and B2, so that the ambient temperature in the boxes A1 and B2 reaches a range suitable for the operation of the transformer body 31. The heating tube 16 cooperates with the cooling component, which means that it can flexibly switch between cooling and heating operations according to the actual temperature conditions to maintain a relatively stable temperature environment inside the box. At this time, the dustproof electric fan 10 on the box B2 takes in air inwards, and the dustproof electric fan 10 on the box A1 blows air outwards;The two operations can be switched flexibly to achieve constant temperature regulation of the temperature inside the box, ensuring that the transformer body 31 is always operating in a suitable temperature range, avoiding overload and overheating damage caused by excessive temperature, or affecting its performance and startup due to excessively low temperature, thereby ensuring the stable operation of the transformer body 31; wherein, rainwater flows into the water channel 35 through the water collecting bucket 14, and finally flows into the water collecting tank 15. ;

[0033] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. An overload protection device for a distribution transformer of a low-voltage distribution line, comprising a box A (1), characterized in that: The box body A (1) is connected to the box body B (2) via a plug-in assembly, the outer wall of the box body A (1) is fixedly connected to a water collecting box (15), the inner wall of the box body B (2) is fixedly connected to a water collecting bucket (14), the outer wall of the box body A (1) is provided with a water outlet trough (19), and further comprises: A dustproof electric fan (10) is symmetrically fixedly connected to the outer walls of the box body A (1) and the box body B (2); A cooling component, the cooling component comprising a pump (11) fixedly connected to the outer wall of a box body A (1), the water outlet of the pump (11) being fixedly connected to an output pipe (12), the water inlet of the pump (11) being fixedly connected to an input pipe (13), and the input pipe (13) being fixedly connected to a water collecting tank (15), the end of the output pipe (12) away from the water outlet of the pump (11) passing through the box body A (1) and being fixedly connected to a water pipe A (21), the outer wall of the water pipe A (21) being fixedly connected to uniformly distributed condensing pipes (17), and the condensing pipes (17) being fixedly connected to the box body A (1), and the outer wall of the condensing pipes (17) being fixedly connected to a water pipe B (22); The heating tube (16) is evenly and fixedly connected to the inner wall of the box body B (2), and the heating tube (16) cooperates with the cooling component; The adjustment mounting assembly is arranged on the inner wall of the box A (1) and the box B (2).

2. The overload protection device for a low-voltage distribution line distribution transformer according to claim 1, characterized in that: The plug-in assembly comprises a main connection block (4) and a secondary connection block (3) which are symmetrically fixedly connected to the outer walls of the box body A (1) and the box body B (2); the outer wall of the secondary connection block (3) is fixedly connected with a ratchet plate (5), and the ratchet plate (5) is slidably connected to the main connection block (4); the inner wall of the main connection block (4) is slidably connected with a clamping block (6), and the outer wall of the clamping block (6) abuts against the outer wall of the ratchet plate (5); the inner wall of the clamping block (6) is slidably connected with symmetrically distributed pulling blocks (34); the outer wall of the pulling block (34) is fixedly connected with a connecting rod (8), and one end of the connecting rod (8) away from the pulling block (34) is fixedly connected with a pulling rod (7); the outer wall of the connecting rod (8) is slidably connected with a limiting plate (36), and the limiting plate (36) is fixedly connected to the main connection block (4).

3. The overload protection device for a low-voltage distribution line distribution transformer according to claim 1, characterized in that: The adjustment and installation assembly comprises a fixing plate (25) symmetrically fixedly connected to the inner walls of the box body A (1) and the box body B (2); a symmetrically distributed guide plate (27) is symmetrically fixedly connected between the fixing plates (25); a symmetrically distributed guide block (28) is slidably connected to the outer wall of the guide plate (27); a bidirectional screw (26) is threadedly connected to the inner wall of the guide block (28); the bidirectional screw (26) is rotationally connected to the fixing plate (25); a knob (30) is fixedly connected to the outer wall of the bidirectional screw (26); a symmetrically distributed linkage plate (29) is rotationally connected to the outer wall of the guide block (28); and a positioning frame (24) is rotationally connected to one end of the linkage plate (29) away from the guide block (28).

4. The overload protection device for a low-voltage distribution line distribution transformer according to claim 2, characterized in that: A strong spring (9) is sleeved on the outer wall of the connecting rod (8), one end of the strong spring (9) is fixedly connected to the limit plate (36), and the other end of the strong spring (9) away from the limit plate (36) is fixedly connected to the clamping block (6).

5. The overload protection device for a low-voltage distribution line distribution transformer according to claim 3, characterized in that: The outer wall of the positioning frame (24) is slidably connected to symmetrically distributed guide rods (23), and the guide rods (23) are fixedly connected to the box body A (1) and the box body B (2).

6. The overload protection device for a low-voltage distribution line distribution transformer according to claim 1, characterized in that: The outer walls of the condensing tube (17) and the heating tube (16) are both fixedly connected to an isolation plate (18), and the box body A (1) and the box body B (2) are both fixedly connected to the isolation plate (18).

7. The overload protection device for a low-voltage distribution line distribution transformer according to claim 3, characterized in that: A transformer body (31) is symmetrically arranged between the positioning frames (24).

8. The overload protection device for a low-voltage distribution line distribution transformer according to claim 1, characterized in that: A water flow channel (35) is provided between the heating tube (16) and the box body B (2), and between the condensing tube (17) and the box body A (1), and the water flow channel (35) is connected to the water outlet trough (19).

9. The overload protection device for a distribution transformer of a low-voltage distribution line according to claim 1, characterized in that: The inner wall of the box body A (1) is fixedly connected with a temperature sensor A (32), and the inner wall of the box body B (2) is fixedly connected with a temperature sensor B (33).

10. The overload protection device for a distribution transformer of a low-voltage distribution line according to claim 1, characterized in that: The inner walls of the box body A (1) and the box body B (2) are both provided with evenly distributed ventilation openings (20).

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