A transformer with self-protection function

Abstract

The present invention belongs to the technical field of power transformation equipment, and in particular relates to a transformer with a self-protection function, comprising a transformer body and a controller arranged on one side of the transformer body, wherein the transformer body is provided with an upper top plate, a lower bottom plate and an oil pillow assembly, and further comprising: a frame-shaped air cavity, wherein the frame-shaped air cavity is provided at the outer edge of the interior of the upper top plate, wherein the upper cavity wall of the frame-shaped air cavity is provided with a plurality of upper air jet holes, and wherein the lower cavity wall of the frame-shaped air cavity is provided with a plurality of lower air jet holes. The present invention utilizes a high-pressure air curtain to prevent external dust, garbage, etc. from adhering to the outer surface of the transformer body, which can greatly reduce the safety hazards of the transformer body, improve the self-protection performance of the transformer body, and can automatically adjust the air curtain pressure based on the external wind force to improve the protection effect. At the same time, it can improve the heat dissipation efficiency of the transformer body and automatically remind personnel to replace deteriorated and aged insulating oil.

Description

Technical Field

[0001] The invention belongs to the technical field of power transformation equipment, and in particular relates to a transformer with a self-protection function. Background Art

[0002] Transformers occupy a key position in the power system. They can significantly increase the output voltage at the power generation end to reduce long-distance transmission losses. On the power consumption side, they can gradually reduce the voltage to the adaptation value for use by equipment. At the same time, they are also widely used in electronic equipment and industrial automation fields, undertaking important tasks such as voltage conversion, signal coupling, and electrical isolation to ensure the power adaptation needs of multiple industries.

[0003] At present, for outdoor transformers, since they need to face the complex outdoor environment, they are easily affected by moisture, dust, foreign matter, etc., which may cause failures. Therefore, it is necessary to improve the protection performance of the transformer to ensure the stable operation of the transformer. For example, patent publication number CN108364757B discloses a box-type transformer with self-protection function;

[0004] In outdoor environments, some garbage (such as plastic bags, paper towels, etc.) may be blown to the transformer by the wind. When the garbage adheres to the surface of the transformer, it will not only hinder the normal heat dissipation of the transformer like dust, but also for flammable garbage, the gap between the garbage and the transformer surface will accumulate heat. Excessive temperature may cause the garbage to burn, thereby causing a fire, which poses certain safety hazards. Summary of the Invention

[0005] The object of the present invention is to provide a transformer with a self-protection function in order to solve the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solution: a transformer with a self-protection function, comprising a transformer body and a controller arranged on one side of the transformer body, wherein the transformer body is provided with an upper top plate, a lower bottom plate and an oil conservator assembly, and further comprising:

[0007] A frame-shaped air cavity is formed at the outer edge of the upper top plate, wherein the upper cavity wall of the frame-shaped air cavity is provided with a plurality of upper air jet holes, and the lower cavity wall of the frame-shaped air cavity is provided with a plurality of lower air jet holes, wherein each of the upper air jet holes and each of the lower air jet holes is inclined, and the air outlet ends of each of the upper air jet holes and each of the lower air jet holes are directed away from the transformer body, and the airflow ejected from the plurality of upper air jet holes and the plurality of lower air jet holes forms an air curtain on the outside of the transformer body;

[0008] An air supply unit is installed below the upper top plate, and an air outlet end of the air supply unit is connected to the interior of the frame-shaped air cavity;

[0009] A detection component is installed on the top of the oil pillow assembly, and the controller controls the operation of the air supply unit according to the electrical signal output by the detection component;

[0010] A heat dissipation unit is installed on the side wall of the transformer body and is used to dissipate heat inside the transformer;

[0011] a detection unit, connected to the liquid outlet end of the heat dissipation unit;

[0012] The early warning unit is installed at the bottom of the upper top plate. The controller controls the early warning unit to work according to the electrical signal output by the detection unit. The early warning unit is connected to the air supply unit and is used to prompt the replacement of the insulating oil inside the transformer body.

[0013] Preferably, the air supply unit includes a mounting bracket fixedly mounted on the bottom of the upper top plate, and an air pump is fixedly mounted on the bottom of the mounting bracket, an air supply pipe is installed at the air outlet end of the air pump, and the air supply pipe is connected to the frame-shaped air cavity, and the air pump is electrically connected to the controller.

[0014] Preferably, the detection component includes a mounting column fixedly mounted on the end face of the oil pillow assembly, and a detachable wind speed sensor is mounted on the top of the mounting column, and the controller controls the operation of the air pump according to the strength of the electrical signal output by the wind speed sensor.

[0015] Preferably, the heat dissipation unit includes a heat sink assembly fixedly mounted on the four vertical side walls of the transformer body, the four vertical side walls of the transformer body are fixedly connected to multiple groups of heat pipes, and the liquid outlet end of each heat pipe passes through the side wall of the heat sink assembly on the same side, a frame-shaped liquid cavity is opened at the inner outer edge of the lower base plate, and a barrel is fixedly inserted at the four corners of the end face of the frame-shaped liquid cavity, the liquid outlet end of each heat pipe is connected to the corresponding barrel, a mounting cover is fixedly mounted on the side wall of the lower base plate, and an oil pump is fixedly mounted inside the mounting cover, the liquid pumping end of the oil pump is connected to the frame-shaped liquid cavity, a liquid outlet pipe is installed at the liquid outlet end of the oil pump, the oil pump is electrically connected to the controller, and the liquid outlet pipe is connected to the oil pillow assembly through the detection unit.

[0016] Preferably, the detection unit includes an insulating hollow column fixedly mounted on the top of the mounting cover, and a transparency detector is fixedly mounted on the side wall of the insulating hollow column, and the detection end of the transparency detector is arranged inside the insulating hollow column, the insulating hollow column is connected to the liquid outlet pipe, and the liquid outlet end of the liquid outlet pipe is arranged below the transparency detector, the top of the insulating hollow column is fixedly plugged with a circulation pipe, and the circulation pipe is connected to the interior of the oil pillow assembly, and the transparency detector is electrically connected to the controller.

[0017] Preferably, the early warning unit includes a hollow plate fixedly mounted on the bottom of the upper top plate, a diverter pipe is fixedly inserted into the side wall of the air supply pipe, and the diverter pipe is connected to the interior of the hollow plate, a circular hole connected to the frame-shaped air cavity is opened on the top of the hollow plate, a normally open solenoid valve is installed inside the circular hole and the air supply pipe, a normally closed solenoid valve is installed inside the diverter pipe, an air piston is slidingly provided inside the hollow plate, and a group of springs are fixed between the air piston and the hollow plate, a pressure switch is installed at a position below the air piston inside the hollow plate, the controller controls the operation of the normally open solenoid valve and the normally closed solenoid valve according to the electrical signal output by the transparency detector, and the controller prompts to replace the insulating oil inside the transformer body according to the electrical signal output by the pressure switch.

[0018] Preferably, a switching tube is fixedly connected to the upper end of the side wall of the insulating hollow column, and a switching electric-controlled valve is installed inside the switching tube. A detachable filter is installed at the tube end of the switching tube, and a detachable return pipe is installed at the end of the filter away from the switching tube, and a one-way valve is installed inside the return pipe. An infusion electric-controlled valve is installed inside the circulating pipe at a position below the liquid outlet end of the return pipe, and the controller controls the operation of the infusion electric-controlled valve and the switching electric-controlled valve according to the electrical signal output by the transparency detector.

[0019] Preferably, a temperature detector is fixedly connected to the side wall of the insulating hollow column, and the temperature measuring end of the temperature detector is arranged inside the insulating hollow plate. The controller controls the operation of the air pump according to the electrical signal output by the temperature detector.

[0020] Compared with existing technologies, the advantages of a transformer with self-protection function are:

[0021] 1. Through the mutual cooperation of the transformer body, controller, upper top plate, lower bottom plate, oil pillow assembly, frame-type air cavity, upper air jet hole, lower air jet hole and air supply unit, an air curtain can be formed on the outside of the transformer body. The high-pressure air curtain is used to prevent external dust, garbage, etc. from adhering to the outer surface of the transformer body, thereby greatly reducing the safety hazards of the transformer body and improving the self-protection performance of the transformer body. In addition, in conjunction with the detection components, the air curtain pressure can be automatically adjusted based on the external wind force to improve the protection effect.

[0022] 2. The heat dissipation unit can circulate the insulating oil inside the transformer body, which can improve the heat dissipation efficiency of the transformer body to a certain extent, and can keep the insulating oil inside the transformer body as mixed and uniform as possible to avoid excessive deterioration of some insulating oil.

[0023] 3. Through the cooperation of the detection unit and the early warning unit, it is possible to judge whether the insulating oil has deteriorated based on the transparency of the insulating oil during the circulation of the insulating oil, and automatically remind personnel to replace the insulating oil, so as to achieve timely early warning of the deterioration of the insulating oil and effectively ensure the normal operation of the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a transformer with a self-protection function provided by the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the upper plate and lower plate of a transformer with a self-protection function provided by the present invention;

[0026] Figure 3 The present invention provides a transformer with a self-protection function. Figure 2 A magnified view of the structure of part A;

[0027] Figure 4 The present invention provides a transformer with a self-protection function. Figure 2 A magnified view of the structure of part B;

[0028] Figure 5 It is a side structural schematic diagram of an insulating hollow column of a transformer with a self-protection function provided by the present invention.

[0029] In the figure: 1 transformer body, 2 controller, 3 upper top plate, 4 lower bottom plate, 5 oil pillow assembly, 6 frame air cavity, 7 upper air jet hole, 8 lower air jet hole, 9 air supply unit, 91 mounting frame, 92 air pump, 93 air supply pipe, 10 detection assembly, 101 mounting column, 102 wind speed sensor, 11 heat dissipation unit, 111 heat sink assembly, 112 heat dissipation pipe, 113 frame liquid cavity, 114 barrel, 115 mounting cover, 116 oil pump, 117 outlet Liquid pipe, 12 detection unit, 121 insulating hollow column, 122 transparency detector, 123 circulation pipe, 13 early warning unit, 131 hollow plate, 132 diverter pipe, 133 circular hole, 134 normally open solenoid valve, 135 normally closed solenoid valve, 136 air piston, 137 spring, 138 pressure switch, 14 switching pipe, 15 switching electric control valve, 16 filter, 17 reflux pipe, 18 one-way valve, 19 infusion electric control valve, 20 temperature detector. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] like Figure 1-Figure 5As shown, a transformer with a self-protection function includes a transformer body 1 and a controller 2 arranged on one side of the transformer body 1. The transformer body 1 is provided with an upper top plate 3, a lower bottom plate 4 and an oil pillow assembly 5, and also includes: a frame-shaped air cavity 6, the frame-shaped air cavity 6 is opened at the outer edge of the interior of the upper top plate 3, the upper cavity wall of the frame-shaped air cavity 6 is provided with a plurality of upper air jet holes 7, and the lower cavity wall of the frame-shaped air cavity 6 is provided with a plurality of lower air jet holes 8, and the air outlet ends of each upper air jet hole 7 and each lower air jet hole 8 are all facing away from the transformer body 1 In the direction of the transformer body 1, the air flows ejected from the multiple upper air jet holes 7 and the multiple lower air jet holes 8 form an air curtain on the outside of the transformer body 1. The air supply unit 9 is installed below the upper top plate 3, and the air outlet end of the air supply unit 9 is connected to the interior of the frame-shaped air cavity 6. The air supply unit 9 includes a mounting bracket 91 fixedly installed on the bottom of the upper top plate 3, and an air pump 92 is fixedly installed on the bottom of the mounting bracket 91. An air supply pipe 93 is installed at the air outlet end of the air pump 92, and the air supply pipe 93 is connected to the frame-shaped air cavity 6. The air pump 92 is electrically connected to the controller 2.

[0032] The detection component 10 is installed on the top of the oil pillow component 5. The controller 2 controls the operation of the air supply unit 9 according to the electrical signal output by the detection component 10. The detection component 10 includes a mounting column 101 fixedly mounted on the end face of the oil pillow component 5, and a detachable wind speed sensor 102 is installed on the top of the mounting column 101. The controller 2 controls the operation of the air pump 92 according to the strength of the electrical signal output by the wind speed sensor 102. The wind speed sensor 102 will rotate based on the wind force and cooperate with its internal micro-power generation structure to output the corresponding electrical signal to the controller 2. This is an existing mature technology, so it will not be elaborated here.

[0033] The heat dissipation unit 11 is installed on the side wall of the transformer body 1 and is used to dissipate the heat inside the transformer. The heat dissipation unit 11 includes a heat sink assembly 111 fixedly installed on the four vertical side walls of the transformer body 1. The four vertical side walls of the transformer body 1 are fixedly connected to multiple groups of heat dissipation pipes 112, and the liquid outlet ends of each heat dissipation pipe 112 pass through the side wall of the heat sink assembly 111 on the same side. A frame-shaped liquid cavity 113 is opened at the inner outer edge of the lower base plate 4, and the end surface of the frame-shaped liquid cavity 113 is Cylinders 114 are fixedly inserted at the four corners, and the liquid outlet ends of each heat dissipation tube 112 are connected to the corresponding cylinder 114. A mounting cover 115 is fixedly installed on the side wall of the lower base plate 4, and an oil pump 116 is fixedly installed inside the mounting cover 115. The liquid pumping end of the oil pump 116 is connected to the frame-shaped liquid cavity 113, and a liquid outlet pipe 117 is installed at the liquid outlet end of the oil pump 116. The oil pump 116 is electrically connected to the controller 2, and the liquid outlet pipe 117 is connected to the oil pillow assembly 5 through the detection unit 12.

[0034] The detection unit 12 is connected to the liquid outlet end of the heat dissipation unit 11. The detection unit 12 includes an insulating hollow column 121 fixedly mounted on the top of the mounting cover 115, and a transparency detector 122 is fixedly mounted on the side wall of the insulating hollow column 121, and the detection end of the transparency detector 122 is arranged inside the insulating hollow column 121, the insulating hollow column 121 is connected to the liquid outlet pipe 117, and the liquid outlet end of the liquid outlet pipe 117 is arranged below the transparency detector 122, and a circulation pipe 123 is fixedly inserted on the top of the insulating hollow column 121, and the circulation pipe 123 is connected to the interior of the oil pillow assembly 5, the transparency detector 122 is electrically connected to the controller 2, the transparency detector 122 judges the transparency of the insulating oil by emitting light and calculating the light intensity received by the receiving end, and automatically outputs an electrical signal to the controller 2 when the transparency is lower than the threshold value. This is an existing mature technology, so it will not be elaborated here.

[0035] The early warning unit 13 is installed at the bottom of the upper top plate 3. The controller 2 controls the early warning unit 13 to work according to the electrical signal output by the detection unit 12. The early warning unit 13 is connected to the air supply unit 9 and is used to prompt the replacement of the insulating oil liquid inside the transformer body 1. The early warning unit 13 includes a hollow plate 131 fixedly installed at the bottom of the upper top plate 3. The side wall of the air supply pipe 93 is fixedly plugged with a shunt pipe 132, and the shunt pipe 132 is connected to the interior of the hollow plate 131. A circular hole 133 connected to the frame-shaped air cavity 6 is opened on the top of the hollow plate 131. A normally open solenoid valve 134 is installed inside the circular hole 133 and the air supply pipe 93, and a normally closed solenoid valve is installed inside the shunt pipe 132. 135. An air piston 136 is slidingly provided inside the hollow plate 131, and a group of springs 137 are fixed between the air piston 136 and the hollow plate 131. A pressure switch 138 is installed inside the hollow plate 131 below the air piston 136. The controller 2 controls the normally open solenoid valve 134 and the normally closed solenoid valve 135 according to the electrical signal output by the transparency detector 122. The controller 2 prompts the replacement of the insulating oil inside the transformer body 1 according to the electrical signal output by the pressure switch 138. After receiving the closing electrical signal of the pressure switch 138, the controller 2 will send an early warning prompt information to the remote terminal through its own communication module to remind personnel to replace the insulating oil.

[0036] A switching tube 14 is fixedly connected to the upper end of the side wall of the insulating hollow column 121, and a switching electric-controlled valve 15 is installed inside the switching tube 14. A detachable filter 16 is installed at the tube end of the switching tube 14. A detachable return pipe 17 is installed at the end of the filter 16 away from the switching tube 14, and a one-way valve 18 is installed inside the return pipe 17. An infusion electric-controlled valve 19 is installed inside the circulating pipe 123 at a position below the liquid outlet end of the return pipe 17. The controller 2 controls the operation of the infusion electric-controlled valve 19 and the switching electric-controlled valve 15 according to the electrical signal output by the transparency detector 122. The switching electric-controlled valve 15 will open when energized and will automatically close when the power is off. The infusion electric-controlled valve 19 will close when energized and will automatically open when the power is off.

[0037] A temperature detector 20 is fixedly connected to the side wall of the insulating hollow column 121, and the temperature measuring end of the temperature detector 20 is set inside the insulating hollow plate 131. The controller 2 controls the operation of the air pump 92 according to the electrical signal output by the temperature detector 20. The temperature detector 20 can detect the temperature of the insulating oil and convert the temperature into an electrical signal and output it to the controller 2.

[0038] The operating principle of the present invention is now explained as follows: when the transformer body 1 is working, the controller 2 is started, and the controller 2 will control the air pump 92 to work. The air pump 92 will suck in the external air (the suction end of the air pump 92 is provided with a bend pipe, and the air inlet end of the bend pipe is at least 1 meter away from the transformer body 1, and a filter is installed to avoid dust and garbage from being sucked into the air pump 92 as much as possible. An anti-blocking component can be provided at the filter. For example, the brush rod is driven by a motor to rotate to clean the dust, garbage, etc. blocked on the surface of the filter to prevent blockage), and the air is transported to the inside of the frame-shaped air cavity 6. Subsequently, part of the air flow is ejected through the upper jet hole 7 on the upper side. Since the upper jet holes 7 are evenly distributed around the transformer body 1 at the outer edge of the upper top plate 3, the air flow ejected from the upper jet hole 7 will form a A layer of air curtain. Similarly, the airflow ejected from the lower air jet hole 8 will also form a layer of air curtain on the outside of the transformer body 1. Each upper air jet hole 7 and each lower air jet hole 8 are inclined, and the air outlet ends of each upper air jet hole 7 and each lower air jet hole 8 are all facing away from the transformer body 1. Therefore, when external dust and garbage (such as plastic bags and paper towels) drift around the transformer, under the action of the high-pressure air curtain, the dust and garbage will drift away from the transformer body 1 along with the air curtain airflow, thereby avoiding as much as possible the dust, garbage, etc. from breaking through the air curtain and contacting the transformer body 1, improving the safety of the transformer body 1, and avoiding as much as possible the dust, garbage, etc. from affecting the heat dissipation performance of the transformer and the garbage from causing a fire (at the same time, the air pump 92 can assist the heat sink assembly 111 in heat dissipation);

[0039] When the external wind force is stronger, the flow speed of garbage, dust, etc. becomes faster, and the impact force becomes greater. At this time, the wind speed sensor 102 will detect that the wind force has become stronger, so the electrical signal strength output by the wind speed sensor 102 to the controller 2 becomes stronger. After the controller 2 receives the stronger electrical signal strength from the wind speed sensor 102, it will control the output power of the air pump 92 to increase accordingly, thereby increasing the outlet pressure of each upper air jet hole 7 and the lower air jet hole 8. As a result, when the wind force becomes stronger, the air curtain pressure can be automatically increased to ensure the air curtain's ability to protect dust and garbage.

[0040] After the controller 2 is started, it will control the oil pump 116 to work. The suction end of the oil pump 116 can pump out the insulating oil inside the frame-shaped liquid cavity 113, so that the insulating oil inside the transformer body 1 can be pumped out through each barrel 114 and each heat dissipation pipe 112. When the insulating oil passes through each heat sink assembly 111 through the heat dissipation pipe 112, the heat dissipation pipe 112 can exchange heat with the heat sink assembly 111. Under the action of the air curtain, the heat of the heat sink assembly 111 will be dissipated in time, and the insulating oil pumped out by the oil pump 116 will be transported to the inside of the insulating hollow column 121 and reflux to the inside of the oil pillow assembly 5 through the circulation pipe 123 at the top. The insulating oil inside the oil pillow assembly 5 is replenished into the interior of the transformer body 1. By circulating the insulating oil, the heat dissipation performance of the transformer body 1 can be improved.

[0041] Secondly, when the temperature of the insulating oil entering the insulating hollow plate 131 is high, it means that the temperature inside the transformer body 1 is high. At this time, the temperature detector 20 will detect the temperature rise, so that the strength of the electrical signal output by the temperature detector 20 to the controller 2 becomes higher. At this time, the controller 2 will synchronously control the output power of the air pump 92 to increase accordingly, so that when the temperature inside the transformer body 1 is high, the air flow speed output by the air pump 92 can be automatically increased, thereby increasing the heat dissipation efficiency of the heat sink assembly 111 and ensuring timely heat dissipation of the transformer body 1;

[0042] As the transformer body 1 works, the insulating oil is affected by the temperature and the oxidation of the air, and the insulating oil will gradually deteriorate and age. The color of the deteriorated and aged insulating oil will gradually become darker. At this time, the light transmittance of the insulating oil entering the insulating hollow column 121 will become lower. At this time, the transparency detector 122 will detect the deterioration and aging of the insulating oil (the transmitting end of the transparency detector 122 emits light, and the intensity of the received light is calculated by the receiving end, so that the transparency of the insulating oil can be detected in time). When the insulating oil deteriorates and ages, the transparency detector 122 will output an electrical signal to the controller 2. At this time, the controller 2 will control the normally closed solenoid valve 135 and the two normally open solenoid valves 134 to work. At this time, the normally open solenoid valve 134 inside the air supply pipe 93 and the circular hole 133 is energized and closed, while the normally closed solenoid valve inside the shunt pipe 132 is energized and closed. When 135 is powered on and turned on, the air flow delivered by the air pump 92 will enter the interior of the hollow plate 131 through the shunt pipe 132. As the air flow inside the hollow plate 131 increases, the air piston 136 will move downward. When only a small amount of insulating oil is deteriorated and aged, the air pump 92 will deliver the air flow to the interior of the hollow plate 131 for a short time, so the air piston 136 will not move down to the specified position. When a large amount of insulating oil is deteriorated and aged, the air pump 92 will deliver the air flow to the interior of the hollow plate 131 for a long time. At this time, the air pressure inside the hollow plate 131 is higher, so the air piston 136 moves down a large distance, thereby contacting the pressure switch 138. After the controller 2 receives the closing electrical signal of the pressure switch 138, the controller 2 sends an early warning prompt information to the remote terminal through its own communication module. The relevant personnel should replace the insulating oil inside the transformer body 1 in time.

[0043] Among them, when the controller 2 receives the electrical signal output by the transparency detector 122, the controller 2 will control the switching electric control valve 15 and the infusion electric control valve 19 to be energized and work. At this time, the switching electric control valve 15 is energized to open, and the infusion electric control valve 19 is energized to close. At this time, the deteriorated and aged insulating oil liquid inside the insulating hollow column 121 will enter the filter 16 through the switching tube 14, and flow back to the circulation tube 123 through the return pipe 17. Therefore, after the deterioration and aging of the insulating oil liquid is detected, this part of the insulating oil liquid can be filtered, thereby intercepting impurities generated by aging and deterioration of the insulating oil liquid, and preventing impurities from affecting the normal operation of the transformer body 1.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A transformer with a self-protection function, comprising a transformer body (1) and a controller (2) arranged on one side of the transformer body (1), wherein the transformer body (1) is provided with an upper top plate (3), a lower bottom plate (4) and an oil pillow assembly (5), and is characterized in that: Also includes: A frame-shaped air cavity (6) is provided at the outer edge of the interior of the upper top plate (3); a plurality of upper jet holes (7) are provided on the upper cavity wall of the frame-shaped air cavity (6); and a plurality of lower jet holes (8) are provided on the lower cavity wall of the frame-shaped air cavity (6); each of the upper jet holes (7) and each of the lower jet holes (8) are inclined; and an air outlet end of each of the upper jet holes (7) and each of the lower jet holes (8) faces a direction away from the transformer body (1); and air flows ejected from the plurality of upper jet holes (7) and the plurality of lower jet holes (8) form an air curtain on the outer side of the transformer body (1); An air supply unit (9) is installed below the upper top plate (3), and an air outlet end of the air supply unit (9) is connected to the interior of the frame-shaped air cavity (6); A detection component (10) is installed on the top of the oil pillow component (5), and the controller (2) controls the operation of the air supply unit (9) according to the electrical signal output by the detection component (10); A heat dissipation unit (11) is installed on the side wall of the transformer body (1) and is used to dissipate heat inside the transformer; A detection unit (12) is connected to the liquid outlet end of the heat dissipation unit (11); An early warning unit (13) is installed at the bottom of the upper top plate (3); the controller (2) controls the early warning unit (13) to operate according to the electrical signal output by the detection unit (12); the early warning unit (13) is connected to the air supply unit (9) and is used to prompt the replacement of the insulating oil liquid inside the transformer body (1); The air supply unit (9) includes a mounting frame (91) fixedly mounted on the bottom of the upper top plate (3), and an air pump (92) is fixedly mounted on the bottom of the mounting frame (91), an air supply pipe (93) is mounted on the air outlet end of the air pump (92), and the air supply pipe (93) is connected to the frame-shaped air cavity (6), and the air pump (92) is electrically connected to the controller (2); The warning unit (13) includes a hollow plate (131) fixedly mounted on the bottom of the upper top plate (3), a shunt pipe (132) is fixedly plugged into the side wall of the air supply pipe (93), and the shunt pipe (132) is connected to the interior of the hollow plate (131), a circular hole (133) connected to the frame-shaped air cavity (6) is opened on the top of the hollow plate (131), and a normally open electromagnetic valve (134) is installed inside the circular hole (133) and the air supply pipe (93), and the shunt pipe (132) is connected to the inner wall of the hollow plate (131). 2) is provided with a normally closed electromagnetic valve (135), a gas piston (136) is provided inside the hollow plate (131) for sliding, and a group of springs (137) are fixedly provided between the gas piston (136) and the hollow plate (131), a pressure switch (138) is provided inside the hollow plate (131) below the gas piston (136), and the controller (2) prompts the replacement of the insulating oil liquid inside the transformer body (1) according to the electrical signal output by the pressure switch (138).

2. A transformer with self-protection function according to claim 1, characterized in that: The detection assembly (10) includes a mounting column (101) fixedly mounted on the end surface of the oil pillow assembly (5), and a detachable wind speed sensor (102) is mounted on the top of the mounting column (101). The controller (2) controls the operation of the air pump (92) according to the strength of the electrical signal output by the wind speed sensor (102).

3. The transformer with self-protection function according to claim 1, characterized in that: The heat dissipation unit (11) comprises a heat sink assembly (111) fixedly mounted on four vertical side walls of the transformer body (1), the four vertical side walls of the transformer body (1) are fixedly connected to a plurality of heat dissipation pipes (112), and the liquid outlet end of each heat dissipation pipe (112) passes through the side wall of the heat dissipation fin assembly (111) on the same side, a frame-shaped liquid cavity (113) is provided at the inner outer edge of the lower base plate (4), and a cylinder (114) is fixedly inserted at the four corners of the end face of the frame-shaped liquid cavity (113), and each heat dissipation pipe (112) is fixedly connected to the heat dissipation pipe (112). The liquid outlet ends of the oil pump (116) and the oil pump (117) are connected to the corresponding barrel (114), the side wall of the lower base plate (4) is fixedly installed with a mounting cover (115), and the interior of the mounting cover (115) is fixedly installed with an oil pump (116), the liquid extraction end of the oil pump (116) is connected to the frame-shaped liquid cavity (113), the liquid outlet end of the oil pump (116) is installed with a liquid outlet pipe (117), the oil pump (116) is electrically connected to the controller (2), and the liquid outlet pipe (117) is connected to the oil pillow assembly (5) through the detection unit (12).

4. A transformer with self-protection function according to claim 3, characterized in that: The detection unit (12) includes an insulating hollow column (121) fixedly mounted on the top of the mounting cover (115), and a transparency detector (122) is fixedly mounted on the side wall of the insulating hollow column (121), and a detection end of the transparency detector (122) is arranged inside the insulating hollow column (121), the insulating hollow column (121) is connected to the liquid outlet pipe (117), and the liquid outlet end of the liquid outlet pipe (117) is arranged below the transparency detector (122), a circulation pipe (123) is fixedly plugged into the top of the insulating hollow column (121), and the circulation pipe (123) is connected to the inside of the oil pillow assembly (5), the transparency detector (122) is electrically connected to the controller (2), and the controller (2) controls the operation of the normally open solenoid valve (134) and the normally closed solenoid valve (135) according to the electrical signal output by the transparency detector (122).

5. The transformer with self-protection function according to claim 4, characterized in that: A switching tube (14) is fixedly connected to the upper end of the side wall of the insulating hollow column (121), and a switching electric control valve (15) is installed inside the switching tube (14). A detachable filter (16) is installed at the end of the switching tube (14). A detachable return pipe (17) is installed at the end of the filter (16) away from the switching tube (14), and a one-way valve (18) is installed inside the return pipe (17). An infusion electric control valve (19) is installed inside the circulating pipe (123) at a position below the liquid outlet end of the return pipe (17). The controller (2) controls the operation of the infusion electric control valve (19) and the switching electric control valve (15) according to the electrical signal output by the transparency detector (122).

6. The transformer with self-protection function according to claim 4, characterized in that: A temperature detector (20) is fixedly connected to the side wall of the insulating hollow column (121), and a temperature measuring end of the temperature detector (20) is arranged inside the insulating hollow plate (131). The controller (2) controls the operation of the air pump (92) according to the electrical signal output by the temperature detector (20).

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