Transformer with self-protection function

Abstract

The invention belongs to the technical field of power transformation equipment, and particularly relates to a transformer with a self-protection function, the transformer comprises a transformer body and a controller arranged on one side of the transformer body, the transformer body is provided with an upper top plate, a lower bottom plate and an oil conservator assembly, the transformer further comprises a frame-shaped air cavity, and the frame-shaped air cavity is formed in the outer edge of the interior of the upper top plate; a plurality of upper air injection holes are formed in the upper cavity wall of the frame-shaped air cavity, and a plurality of lower air injection holes are formed in the lower cavity wall of the frame-shaped air cavity. External dust, garbage and the like are prevented from being attached to the outer surface of the transformer body through the high-pressure air curtain, potential safety hazards of the transformer body can be greatly reduced, the self-protection performance of the transformer body can be improved, the air curtain pressure can be automatically adjusted and controlled based on the external wind power, the protection effect is improved, and meanwhile the protection effect is improved. The heat dissipation efficiency of the transformer body can be improved, and personnel can be automatically reminded 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, a box-type transformer with a self-protection function is disclosed in patent announcement number CN108364757B;

[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 surface of the transformer will accumulate heat. Excessive temperature may cause the garbage to burn, thereby causing a fire, which poses a certain safety hazard. Summary of the invention

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

[0006] To achieve the above object, the present invention adopts the following technical scheme: 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:

[0007] A frame-shaped air cavity is provided at the outer edge of the upper top plate, 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, 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 oriented in a direction away from the transformer body, and the airflows ejected from the plurality of upper air jet holes and the plurality of lower air jet holes form an air curtain on the outer side 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 component, 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, installed on the side wall of the transformer body, for dissipating the heat inside the transformer;

[0011] A detection unit, connected to the liquid outlet 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 to prompt the replacement of the insulating oil liquid inside the transformer body.

[0013] Preferably, the air supply unit includes a mounting frame fixedly mounted on the bottom of the upper top plate, and an air pump is fixedly mounted on the bottom of the mounting frame, 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 assembly 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 with multiple groups of heat dissipation tubes, and the liquid outlet end of each heat dissipation tube 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, and the liquid outlet end of each heat dissipation tube is connected with 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 extraction end of the oil pump is connected with 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 with 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 with a liquid outlet pipe, and the liquid outlet end of the liquid outlet pipe is arranged below the transparency detector, a circulation pipe is fixedly inserted on the top of the insulating hollow column, and the circulation pipe is connected with 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 shunt pipe is fixedly inserted on the side wall of the air supply pipe, and the shunt 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, normally open solenoid valves are installed inside the circular hole and the air supply pipe, a normally closed solenoid valve is installed inside the shunt pipe, an air piston is slidably 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, a detachable reflux pipe is installed at the end of the filter away from the switching tube, and a one-way valve is installed inside the reflux pipe, an infusion electric-controlled valve is installed inside the circulating pipe at a position below the liquid outlet end of the reflux 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, and the controller controls the operation of the air pump according to the electrical signal output by the temperature detector.

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

[0021] 1. Through the cooperation of the transformer body, controller, upper top plate, lower bottom plate, oil pillow assembly, frame-type air cavity, upper jet hole, lower 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 combination 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 mixed and uniform as much 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 It is a structural schematic diagram of a transformer with a self-protection function provided by the present invention;

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

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

[0027] Figure 4 The 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 jet hole, 8 lower 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 shunt pipe, 133 round hole, 134 normally open solenoid valve, 135 normally closed solenoid valve, 136 gas 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 described clearly and completely 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 upper top plate 3, the upper cavity wall of the frame-shaped air cavity 6 is provided with a plurality of upper jet holes 7, and the lower cavity wall of the frame-shaped air cavity 6 is provided with a plurality of lower jet holes 8, and the gas outlet ends of each upper jet hole 7 and each lower jet hole 8 are facing away from the transformer body 1. In the direction, the air flows ejected from the multiple upper jet holes 7 and the multiple lower 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 communicated with the interior of the frame-shaped air cavity 6, the air supply unit 9 includes a mounting frame 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 frame 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 communicated with the frame-shaped air cavity 6, and 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 a 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 bottom plate 4, and the end surface of the frame-shaped liquid cavity 113 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 extraction 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 inside 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, which is an existing mature technology and 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 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 inside 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, a gas piston 136 is slidably provided inside the hollow plate 131, and a group of springs 137 are fixedly provided between the gas piston 136 and the hollow plate 131, and a pressure switch 138 is installed at a position below the gas piston 136 inside the hollow plate 131. The controller 2 controls the normally open solenoid valve 134 and the normally closed solenoid valve 135 to work according to the electrical signal output by the transparency detector 122. The controller 2 prompts to replace the insulating oil liquid 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 liquid.

[0036] A switching tube 14 is fixedly inserted at 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 tube 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 tube 17. An infusion electric-controlled valve 19 is installed inside the circulating tube 123 at a position below the liquid outlet end of the return tube 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 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. 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 external air (the air suction end of the air pump 92 is provided with a bent pipe, and the air inlet end of the bent pipe is at least 1 meter away from the transformer body 1, and a filter is installed to try to avoid dust and garbage being sucked into the air pump 92. An anti-blocking component can be set at the filter. For example, a brush rod is driven by a motor to rotate to clean 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 airflow 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 airflow ejected from the upper jet hole 7 will form a A layer of air curtain. Similarly, the airflow ejected from the lower jet hole 8 will also form a layer of air curtain on the outside of the transformer body 1. Each upper jet hole 7 and each lower jet hole 8 are inclined, and the air outlet ends of each upper jet hole 7 and each lower 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 dust, garbage, etc. from breaking through the air curtain and contacting the transformer body 1 as much as possible, improving the safety of the transformer body 1, and avoiding dust, garbage, etc. from affecting the heat dissipation performance of the transformer, and garbage causing 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. is faster, and the impact force is greater. At this time, the wind speed sensor 102 will detect that the wind force is 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 electrical signal strength of 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 jet hole 7 and the lower jet hole 8, and then automatically increase the air curtain pressure when the wind force becomes stronger, to ensure the air curtain's ability to protect dust and garbage;

[0040] After the controller 2 is started, the oil pump 116 will be controlled to work. The suction end of the oil pump 116 can extract the insulating oil in the frame-shaped liquid cavity 113, so that the insulating oil in the transformer body 1 can be extracted 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 extracted 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, and the insulating oil in the oil pillow assembly 5 is supplemented to the inside 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 electrical signal strength 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, the heat dissipation efficiency of the heat sink assembly 111 can be increased, and the timely heat dissipation of the transformer body 1 can be ensured;

[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, and the color of the deteriorated and aged insulating oil will gradually darken. 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 deterioration of 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 air supply pipe 93 and the normally open solenoid valve 134 inside the circular hole 133 are energized and closed, while the normally closed solenoid valve inside the shunt pipe 132 is energized and closed. 135 is powered on and turned on. At this time, the airflow delivered by the air pump 92 will enter the hollow plate 131 through the shunt pipe 132. As the airflow 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 delivers the airflow to 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 delivers the airflow to the hollow plate 131 for a long time. At this time, the air pressure inside the hollow plate 131 is high, so the air piston 136 moves downward a large distance, so that it can touch 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 return to the circulation tube 123 through the reflux 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, so as to intercept impurities generated by aging and deterioration of the insulating oil liquid, and prevent the 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 principle of the present invention should be included in the protection scope 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), characterized in that: Also includes: A frame-shaped air cavity (6) is provided at the outer edge of the upper top plate (3); the upper cavity wall of the frame-shaped air cavity (6) is provided with a plurality of upper jet holes (7); and the lower cavity wall of the frame-shaped air cavity (6) is provided with a plurality of lower jet holes (8); each of the upper jet holes (7) and each of the lower jet holes (8) is inclined; and the air outlet ends of each of the upper jet holes (7) and each of the lower jet holes (8) are oriented in a direction away from the transformer body (1); and the airflows 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) 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).

2. A transformer with self-protection function according to claim 1, characterized in that: The air supply unit (9) comprises 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).

3. A transformer with self-protection function according to claim 2, characterized in that: The detection component (10) comprises a mounting column (101) fixedly mounted on the end surface of the oil pillow component (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).

4. A transformer with self-protection function according to claim 2, characterized in that: The heat dissipation unit (11) comprises a heat sink assembly (111) fixedly mounted on four vertical side walls of a 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 sink 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 surface of the frame-shaped liquid cavity (113); each heat dissipation pipe (112) is connected to a heat sink assembly (111) and a heat sink assembly (111) is connected to the ... The liquid outlet ends of the oil pump (116) are connected to the corresponding barrel (114), the side wall of the lower base plate (4) is fixedly mounted with a mounting cover (115), and an oil pump (116) is fixedly mounted inside the mounting cover (115), 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).

5. A transformer with self-protection function according to claim 4, characterized in that: The detection unit (12) comprises 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 a 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), and the transparency detector (122) is electrically connected to the controller (2).

6. A transformer with self-protection function according to claim 5, characterized in that: The early warning unit (13) comprises 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); the shunt pipe (132) is connected to the inside 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); a normally closed solenoid valve (135) is installed inside the shunt pipe (132); and the hollow plate (131) is provided with a plurality of air supply pipes (131) and a plurality of air supply pipes (131). A gas piston (136) is slidably provided inside the hollow plate (131), and a group of springs (137) are fixedly provided between the gas piston (136) and the hollow plate (131). A pressure switch (138) is installed inside the hollow plate (131) at a position below the gas piston (136). 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). The controller (2) prompts to replace the insulating oil liquid inside the transformer body (1) according to the electrical signal output by the pressure switch (138).

7. The transformer with self-protection function according to claim 5, characterized in that: A switching tube (14) is fixedly plugged into 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 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 control valve (19) is installed inside the circulation pipe (123) at a position below the liquid outlet end of the return pipe (17); and 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).

8. The transformer with self-protection function according to claim 5, characterized in that: A temperature detector (20) is fixedly plugged into 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 an electrical signal output by the temperature detector (20).

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