Oil-leakage-proof sealed transformer
By introducing automatic pressure relief and active heat dissipation return components and agitators into the transformer, the problems of low heat dissipation efficiency and leakage under high temperature are solved, enabling rapid pressure relief and internal status monitoring, thereby improving the operational reliability and lifespan of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional transformers have low heat dissipation efficiency at high temperatures, their static sealing structure is prone to leakage, internal metal debris affects insulation performance, and there is a lack of effective monitoring methods, which increases operational risks.
A structure including a transformer housing, a return current assembly, and a heat dissipation assembly was designed. Automatic pressure relief is achieved by using an electromagnet and a reset spring. Combined with an agitator and an electromagnet to attract sludge, rapid pressure relief and active heat dissipation are achieved. The internal status is monitored by a pressure sensor.
It enables rapid pressure relief and active heat dissipation of transformers under high temperature conditions, prevents oil leakage, monitors internal corrosion in a timely manner, and improves operational reliability and service life.
Smart Images
Figure CN121748112A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of transformers, in particular to a transformer with oil leakage prevention and sealing. BACKGROUND
[0002] As a core device indispensable to the power system, the stability of the transformer directly relates to the safety and efficiency of the power grid. During the operation of the transformer, a large amount of heat is generated due to the loss of the iron core and the coil. If the heat is not dissipated in time, the internal temperature will rise, the insulating oil will expand, and the pressure will increase. Long-term operation can easily cause leakage or rupture at the sealing part, resulting in insulating oil leakage. This not only affects the insulation performance and heat dissipation effect of the transformer itself, but also may cause environmental pollution and fire risk, seriously threatening the stable operation of the power system.
[0003] At present, the traditional oil-immersed transformer mainly uses heat dissipation fins, heat dissipation pipes or external coolers for heat dissipation, and achieves static sealing through structures such as sealing glue and rubber pads. However, under the working conditions of temperature changes or long-term high-temperature operation, the internal pressure of the transformer fluctuates greatly, and the static sealing structure is difficult to adapt to the pressure change, which is easy to cause leakage at the welding seam or flange connection. In addition, the existing heat dissipation system mainly relies on natural convection or external fan forced cooling, and the heat dissipation efficiency is limited. Moreover, it cannot achieve rapid pressure relief and oil circulation cooling under high temperature, further increasing the risk of oil leakage.
[0004] On the other hand, the internal metal components of the transformer are affected by the erosion of the insulating oil and electromagnetic vibration during long-term operation, which will produce tiny metal debris or oil sludge. These impurities not only reduce the insulation performance of the insulating oil, but also deposit in the oil circuit, affecting the heat dissipation efficiency, and even causing partial discharge or short circuit. At present, there is a lack of effective monitoring means for the internal metal debris of the transformer, making it difficult to timely warn the equipment aging or internal erosion, further increasing the operation risk.
[0005] Therefore, in order to solve the above problems, there is an urgent need for a transformer structure with efficient heat dissipation, automatic pressure relief, oil leakage prevention and sealing, and internal state monitoring function, to improve its operation reliability and service life. SUMMARY
[0006] The present application relates to the technical field of transformers, in particular to a transformer with oil leakage prevention and sealing.
[0007] In order to achieve the above object, the present application provides the following technical scheme: An oil leakage prevention sealed transformer, comprising a transformer shell, a backflow assembly and a heat dissipation assembly, first heat dissipation fins are arranged at the front and rear ends of the transformer shell, a working cavity is formed at the inner top end of the transformer shell, and an iron core coil is arranged in the working cavity, a high and low voltage bushing is arranged at the top outer end of the transformer shell, a backflow cavity is formed at the bottom inner side of the transformer shell, and the backflow assembly is arranged in the backflow cavity, the backflow assembly comprises a first electromagnet, a armature block is arranged at the top outer end of the first electromagnet, a return spring is arranged between the armature block and the transformer shell, a backflow groove is formed at the inner side of the armature block, a through groove is formed at the inner side of the transformer shell, a heat insulation plate is arranged at the outer end of the transformer shell, a one-way outlet pipe is connected to the end of the through groove, the heat dissipation assembly is arranged at the outer end of the transformer shell, a backflow opening is formed between the transformer shell and the heat insulation plate, and a one-way inlet pipe is connected to the end of the backflow opening.
[0008] Further, the first electromagnet is electromagnetically connected with the armature block, and the armature block is elastically connected with the transformer shell through the return spring.
[0009] Further, the outer contour of the armature block matches the inner wall contour size of the transformer shell, and the gap at the joint of the armature block and the transformer shell is sealed by a sealing strip.
[0010] Further, the first electromagnet loses power to make the armature block move up under the rebound of the return spring, and the armature block moving up makes the backflow groove communicate with the working cavity.
[0011] Further, the backflow groove is S-shaped, and the armature block moving up makes the backflow groove communicate with the through groove.
[0012] Further, the heat dissipation assembly comprises a heat dissipation box, a motor is arranged at the outer end of the heat dissipation box, an agitating paddle is arranged in the heat dissipation box, a fixing cover is arranged at the inner bottom end of the heat dissipation box, a pressure spring and a pressure sensor are arranged in the fixing cover, a second electromagnet is arranged at the top outer end of the pressure spring, and second heat dissipation fins are arranged at the outer ends of the heat dissipation box.
[0013] Further, the through groove communicates with the heat dissipation box through the one-way outlet pipe, and the heat dissipation box communicates with the one-way inlet pipe through the backflow opening.
[0014] Further, the motor drives the agitating paddle to rotate, and the vertical center line of the agitating paddle coincides with the vertical center line of the heat dissipation box.
[0015] Further, the inner contour of the fixing cover matches the outer contour size of the second electromagnet, and the second electromagnet is elastically connected with the pressure spring.
[0016] Further, the second electromagnet adsorbs the metal debris and moves downward to extrude the pressure spring, and the second electromagnet is attached to the pressure sensor.
[0017] The application provides an oil leakage-proof sealed transformer, which has the following beneficial effects:
[0018] 1、The temperature inside the working cavity rises, and the pressure inside the working cavity also rises naturally, at this time, the displacement of the armature block can cause a pressure relief port in the working cavity, which makes the hydraulic oil in the working cavity enter the return groove due to the pressure difference, and enter the heat sink inside through the through groove and the one-way outlet pipe, through the design, the equipment can quickly relieve pressure in a high temperature state, which can avoid the temperature rise in the transformer shell causing the pressure to rise, and then the high pressure impacting the weld and the joint gap of the transformer shell, causing the transformer shell to leak oil, and too much oil entering the heat sink inside through the one-way outlet pipe will flow back to the working cavity through the return flow port and the one-way inlet pipe, through the design, the reduction of oil in the working cavity will not affect its normal heat dissipation.
[0019] 2、When the temperature in the working cavity is too high, the armature block is ejected by the loss of power of the electromagnet, so that the return groove is connected to the through groove and the working cavity, at this time, the motor drives the stirring paddle to rotate, which can make the stirring paddle stir the cooling oil inside the heat sink, in the process of flowing, the cooling oil will enter the working cavity through the return flow port and the one-way inlet pipe, and at this time, the working cavity is in a full oil state, which makes the oil in the working cavity enter the heat sink through the return groove, the through groove and the one-way outlet pipe, through the design, the equipment can actively replace the oil to cool down when the oil temperature in the working cavity is too high, and the cooling oil entering the heat sink can be cooled by the second heat dissipation fin, and the heat insulation plate can effectively insulate the temperature in the working cavity and the heat sink, which can ensure that the high temperature of the oil entering the heat sink can be dissipated by the second heat dissipation fin, which makes the equipment have excellent heat dissipation performance while maintaining oil leakage-proof sealing.
[0020] 3、The transformer shell of the present application in the process of use, the cast iron structure in its inside will form the oil sludge with magnetism under the corrosion of oil, and it is difficult to judge the amount of oil sludge from the outside of the equipment, and after the increase of oil sludge, the heat dissipation effect of the equipment will be affected, and the cast iron eroded is also prone to leakage, because the equipment is cooled by making the cooling oil backflow, in the process of backflow of the cooling oil, the oil sludge in the working cavity will enter the heat dissipation box along with the flow of the cooling oil, the second electromagnet can adsorb the oil sludge in the cooling oil entering the heat dissipation box, and when the cooling oil does not flow, the cooling oil in the heat dissipation box can flow by rotating the stirring paddle driven by the motor, which can promote the heat dissipation of the cooling oil and make the second electromagnet fully capture the oil sludge, and when the oil sludge adsorbed by the second electromagnet is too much, it will extrude the pressure spring to move downward in the fixed cover, which makes the second electromagnet contact with the pressure sensor, through the design, the equipment can judge the corrosion condition in the transformer shell by judging whether the pressure sensor senses the pressure, so that the transformer shell can be repaired before corrosion. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the overall three-dimensional structure schematic diagram of the oil leakage prevention sealed transformer of the present application;
[0022] Figure 2 It is the internal structure schematic diagram of the heat dissipation assembly of the oil leakage prevention sealed transformer of the present application;
[0023] Figure 3 It is the internal structure schematic diagram of the working cavity of the oil leakage prevention sealed transformer of the present application;
[0024] Figure 4 It is the internal structure schematic diagram of the backflow cavity of the oil leakage prevention sealed transformer of the present application;
[0025] Figure 5 It is the overall cross-sectional structure schematic diagram of the oil leakage prevention sealed transformer of the present application;
[0026] Figure 6 It is the schematic diagram of the armature block of the oil leakage prevention sealed transformer of the present application not being lifted;
[0027] Figure 7 It is the schematic diagram of the armature block of the oil leakage prevention sealed transformer of the present application being lifted.
[0028] In the figure: 1, transformer shell; 2, first heat dissipation fin; 3, working cavity; 4, core coil; 5, high-low voltage sleeve; 6, backflow cavity; 7, backflow assembly; 701, first electromagnet; 702, armature block; 703, reset spring; 704, backflow groove; 8, through groove; 9, heat insulation plate; 10, one-way outlet pipe; 11, heat dissipation assembly; 1101, heat dissipation box; 1102, motor; 1103, stirring paddle; 1104, fixed cover; 1105, pressure spring; 1106, pressure sensor; 1107, second electromagnet; 1108, second heat dissipation fin; 12, backflow opening; 13, one-way inlet pipe. DETAILED DESCRIPTION
[0029] Referring to Figures 1 to 7 The present application provides a technical solution: an oil leakage prevention sealed transformer, comprising a transformer shell 1, a backflow assembly 7 and a heat dissipation assembly 11, the front and rear ends of the transformer shell 1 are provided with first heat dissipation fins 2, and the inner top end of the transformer shell 1 is provided with a working cavity 3, and the inner part of the working cavity 3 is provided with a core coil 4, the outer top end of the transformer shell 1 is provided with a high-low voltage sleeve 5, the bottom inner side of the transformer shell 1 is provided with a backflow cavity 6, and the inner part of the backflow cavity 6 is provided with a backflow assembly 7, the backflow assembly 7 comprises a first electromagnet 701, the top outer end of the first electromagnet 701 is provided with an armature block 702, and the armature block 702 and the transformer shell 1 are provided with a reset spring 703, the inner side of the armature block 702 is provided with a backflow groove 704, the inner side of the transformer shell 1 is provided with a through groove 8, the outer end of the transformer shell 1 is provided with a heat insulation plate 9, the end of the through groove 8 is connected with a one-way outlet pipe 10, the outer end of the transformer shell 1 is provided with a heat dissipation assembly 11, the transformer shell 1 and the heat insulation plate 9 are provided with a backflow opening 12, and the backflow opening 12 at one end of the transformer shell 1 is connected with a one-way inlet pipe 13.
[0030] The specific operation is as follows: after the staff arranges the core coil 4 in the working cavity 3 of the transformer shell 1, the staff connects the wire harness between the core coil 4 and the high-low voltage sleeve 5, after the wire harness of the two is connected, the staff seals the transformer shell 1, fills the cooling oil in the working cavity 3 and the heat dissipation box 1101, and thus the preparation work of the equipment is completed, the equipment can be moved to the working place, the transformer shell 1 is fixed stably, the staff connects the corresponding wire harness on the high-low voltage sleeve 5, and the equipment inside is powered on, and the equipment can work normally.
[0031] Referring to Figures 1 to 7, the first electromagnet 701 is electromagnetically connected with the armature block 702, the armature block 702 is elastically connected with the transformer shell 1 through the reset spring 703, the outer contour of the armature block 702 matches the inner wall contour size of the transformer shell 1, the gap at the joint of the armature block 702 and the transformer shell 1 is sealed by a sealing strip, the first electromagnet 701 loses power to make the armature block 702 move up by the rebound of the reset spring 703, the armature block 702 moves up to make the backflow groove 704 communicate with the working cavity 3, the backflow groove 704 is S-shaped, the armature block 702 moves up to make the backflow groove 704 communicate with the through groove 8, the heat dissipation assembly 11 comprises a heat dissipation box 1101, a motor 1102 is arranged at the outer end of the heat dissipation box 1101, an agitating paddle 1103 is arranged in the heat dissipation box 1101, a fixing cover 1104 is arranged at the inner bottom end of the heat dissipation box 1101, a pressure spring 1105 and a pressure sensor 1106 are arranged in the fixing cover 1104, a second electromagnet 1107 is arranged at the top outer end of the pressure spring 1105, second heat dissipation fins 1108 are arranged at the outer ends of the heat dissipation box 1101, the through groove 8 communicates with the heat dissipation box 1101 through the one-way outlet pipe 10, and the heat dissipation box 1101 communicates with the one-way inlet pipe 13 through the backflow opening 12, the motor 1102 drives the agitating paddle 1103 to rotate, the vertical center line of the agitating paddle 1103 coincides with the vertical center line of the heat dissipation box 1101, the inner contour of the fixing cover 1104 matches the outer contour size of the second electromagnet 1107, and the second electromagnet 1107 is elastically connected with the pressure spring 1105, the second electromagnet 1107 adsorbs too much metal debris weight to move down by extruding the pressure spring 1105, and the second electromagnet 1107 moves down to be attached to the pressure sensor 1106;
[0032] The specific operation is as follows, after the device works, the iron core coil 4 will emit a large amount of heat, which makes the oil temperature of the cooling oil in the working cavity 3 rise, the first heat dissipation fin 2 is arranged at the front and rear ends of the transformer shell 1, the first heat dissipation fin 2 can make the cooling oil exchange heat with the air outside, which can keep the cooling oil at a proper temperature, thereby ensuring the cooling effect, the backflow cavity 6 and the working cavity 3 are located inside the transformer shell 1, when the temperature inside the working cavity 3 rises, the temperature will be transmitted to the inside of the backflow cavity 6 through the transformer shell 1, the first electromagnet 701 inside the backflow cavity 6 is provided with a temperature sensing element, when the temperature inside the transformer shell 1 reaches a specified temperature (the temperature is usually set to an ineffective cooling temperature), the first electromagnet 701 will lose power, after the first electromagnet 701 loses power, the armature block 702 will reset due to the loss of magnetic attraction and the rebound of the return spring 703, which makes the armature block 702 able to enter the working cavity 3 from the backflow cavity 6, after the armature block 702 moves up, one end of the backflow groove 704 inside the armature block 702 enters the working cavity 3, and the other end communicates with the through groove 8, because the working cavity 3 is filled with cooling oil, the armature block 702 is in the state of rebounding, so when the armature block 702 is lowered by the first electromagnet 701, the oil in the working cavity 3 is not full, which makes the armature block 702 not appear the situation that the working cavity 3 is full of oil and cannot move up, because the temperature inside the working cavity 3 rises, the pressure inside the working cavity 3 also naturally rises, at this time, through the displacement of the armature block 702, a pressure relief port can be formed in the working cavity 3, which makes the hydraulic oil in the working cavity 3 enter the backflow groove 704 due to the pressure difference, and then enters the heat dissipation box 1101 through the through groove 8 and the one-way outlet pipe 10, through the design, the device can quickly relieve pressure in a high temperature state, which can avoid the situation that the temperature rise in the transformer shell 1 leads to the pressure rise, thereby making the high pressure impact the weld and the joint gap of the transformer shell 1, resulting in the situation that the transformer shell 1 leaks oil, after too much oil enters the heat dissipation box 1101 through the one-way outlet pipe 10, because the heat dissipation box 1101 is in a full oil state, too much oil in the heat dissipation box 1101 will flow back to the working cavity 3 through the backflow port 12 and the one-way inlet pipe 13, through the design, it can avoid the situation that the reduction of the oil in the working cavity 3 affects the normal heat dissipation, the heat dissipation box 1101 and the transformer shell 1 are insulated by the heat insulation plate 9, through the design, it can avoid the situation that the high temperature of the transformer shell 1 is transmitted to the inside of the heat dissipation box 1101, in addition, when the temperature in the working cavity 3 is too high, the first electromagnet 701 loses power to make the armature block 702 rebound, so that the backflow groove 704 communicates with the through groove 8 and the working cavity 3, at this time, the motor 1102 drives the stirring paddle 1103 to rotate, which can make the stirring paddle 1103 stir the cooling oil in the heat dissipation box 1101, in the process of flowing, the cooling oil will enter the working cavity 3 through the backflow port 12 and the one-way inlet pipe 13, and at this time, the working cavity 3 is in a full oil state,This makes the oil in the working cavity 3 will be through the backflow tank 704, the through groove 8 and the one-way outlet pipe 10 into the heat sink 1101, through the design, can make the equipment in the oil temperature in the working cavity 3 is too high through the active oil replacement to realize cooling, and the cooling oil into the heat sink 1101 can be cooled by the second heat dissipation fin 1108, and the heat insulation plate 9 can effectively isolate the temperature in the working cavity 3 and the heat sink 1101, which can ensure that the high temperature of the oil entering the heat sink 1101 can be dissipated through the second heat dissipation fin 1108, which makes the equipment has excellent heat dissipation performance while maintaining the oil leakage sealing. The transformer shell 1 in the use process, the cast iron structure in the inside will form the oil sludge with magnetism under the erosion of oil, and it is difficult to judge the amount of oil sludge from the outside of the equipment, and after the oil sludge increases, it will affect the heat dissipation effect of the equipment, and the cast iron which is eroded is also prone to leakage. Because the equipment cools the cooling oil by making it flow back, the oil sludge in the working cavity 3 will enter the heat sink 1101 along with the cooling oil flowing back. The second electromagnet 1107 can adsorb the oil sludge in the cooling oil in the heat sink 1101. When the cooling oil does not flow, the rotating stirring paddle 1103 driven by the motor 1102 can make the cooling oil in the heat sink 1101 flow, which can promote the heat dissipation of the cooling oil and make the second electromagnet 1107 fully capture the oil sludge. When the second electromagnet 1107 adsorbs too much oil sludge, it will press the pressure spring 1105 to move downward in the fixed cover 1104, which makes the second electromagnet 1107 contact with the pressure sensor 1106. Through the design, the equipment can judge the erosion condition in the transformer shell 1 by judging whether the pressure sensor 1106 senses the pressure, so as to repair the transformer shell 1 before erosion.
[0033] In summary, the oil leakage sealing transformer, in use, first, the staff will set the iron core coil 4 in the working cavity 3 of the transformer shell 1, then the staff will set the iron core coil 4 and the high-low voltage sleeve 5, after the two wire harnesses are connected, the staff will close the transformer shell 1, and fill the cooling oil in the working cavity 3 and the heat sink 1101. At this point, the preparation of the equipment is completed, the equipment can be moved to the work site, the transformer shell 1 is fixed stably, the corresponding wire harness is connected to the high-low voltage sleeve 5, and the internal power supply equipment is powered on. The equipment can work normally.
[0034] Then the device works, the core coil 4 will emit a large amount of heat, which makes the cooling oil inside the working cavity 3 oil temperature will rise, the transformer shell 1 is provided with first heat dissipation fin 2 at both ends, the first heat dissipation fin 2 can make cooling oil and the air outside heat exchange, this can make cooling oil maintain appropriate temperature, so as to ensure the cooling effect, reflux cavity 6 and working cavity 3 are located in the inside of transformer shell 1, when the temperature inside the working cavity 3 rises, its temperature will be transmitted to the inside of reflux cavity 6 through the transformer shell 1, the first electromagnet 701 inside the reflux cavity 6 is provided with temperature sensing element, when the temperature inside the transformer shell 1 reaches the specified temperature (the temperature is usually set to be unable to effectively cool temperature), the first electromagnet 701 will lose power, after the first electromagnet 701 loses power, the armature block 702 will be reset due to the loss of magnetic adsorption with the rebound of reset spring 703, which makes the armature block 702 can be from the reflux cavity 6 top into the working cavity 3, after the armature block 702 moves up, one end of the reflux groove 704 inside it will enter the working cavity 3, the other end will be communicated with the through slot 8, because the working cavity 3 is filled with cooling oil, the armature block 702 is in the state of rebound, so when the armature block 702 is attracted by the first electromagnet 701 and moves down, the oil in the working cavity 3 is in the state of not full, which makes the armature block 702 move up without the working cavity 3 in the full oil cannot move up, because the temperature inside the working cavity 3 rises, the pressure inside it will also rise naturally, at this time, through the displacement of the armature block 702, the working cavity 3 can produce pressure relief port, which makes the hydraulic oil in the working cavity 3 will enter into the reflux groove 704 due to the pressure difference, and enter into the heat dissipation box 1101 through the through slot 8 and one-way outlet pipe 10, through the design, the device can be in high temperature state when the pressure relief is fast, which can avoid the temperature rise in the transformer shell 1 leads to the pressure rise, and then makes the high pressure impact the weld and splicing gap of the transformer shell 1, resulting in the transformer shell 1 appears the situation of oil leakage;
[0035] Then the excessive oil enters the inside of the heat sink 1101 through the one-way outlet pipe 10, and because the heat sink 1101 is in the full oil state, the excessive oil in the heat sink 1101 will flow back to the working cavity 3 through the backflow passage 12 and the one-way inlet pipe 13. Through this design, the reduction of the oil in the working cavity 3 can be avoided, and the normal heat dissipation can be ensured. The heat insulation plate 9 is used to insulate the heat sink 1101 and the transformer shell 1. Through this design, the high temperature of the transformer shell 1 can be prevented from being transferred to the inside of the heat sink 1101. In addition, when the temperature in the working cavity 3 is too high, the first electromagnet 701 loses power, the armature block 702 is lifted, the backflow groove 704 is connected to the counter passage 8 and the working cavity 3, and the motor 1102 drives the stirring paddle 1103 to rotate. The stirring paddle 1103 can stir the cooling oil in the inside of the heat sink 1101. In the process of flowing, the cooling oil will enter the working cavity 3 through the backflow passage 12 and the one-way inlet pipe 13. At this time, the working cavity 3 is in the full oil state, and the excessive oil in the working cavity 3 will enter the heat sink 1101 through the backflow groove 704, the counter passage 8 and the one-way outlet pipe 10. Through this design, the device can realize cooling through active oil replacement when the temperature of the oil in the working cavity 3 is too high. The cooling oil entering the heat sink 1101 can be cooled through the second heat dissipation fin 1108. The heat insulation plate 9 can effectively insulate the temperature in the working cavity 3 and the heat sink 1101. This can ensure that the high temperature of the oil entering the heat sink 1101 can be dissipated through the second heat dissipation fin 1108. This makes the device have excellent heat dissipation performance while maintaining the oil leakage-proof seal.
[0036] Finally, in the process of using the transformer shell 1, the cast iron structure in the inside of the transformer shell 1 will form oil sludge with magnetism under the erosion of the oil. It is difficult to judge the amount of the oil sludge from the outside of the device. When the amount of the oil sludge increases, the heat dissipation effect of the device will be affected, and the eroded cast iron is also prone to leakage. Because the device cools the cooling oil through backflow, the oil sludge in the inside of the working cavity 3 will enter the inside of the heat sink 1101 along with the cooling oil in the process of backflow. The second electromagnet 1107 can adsorb the oil sludge in the cooling oil entering the heat sink 1101. When the cooling oil does not flow, the motor 1102 drives the stirring paddle 1103 to rotate, which can make the cooling oil in the heat sink 1101 flow. This can not only promote the heat dissipation of the cooling oil, but also enable the second electromagnet 1107 to fully capture the oil sludge. When the second electromagnet 1107 adsorbs too much oil sludge, it will press the pressure spring 1105 to move downward in the fixed cover 1104. This makes the second electromagnet 1107 contact the pressure sensor 1106. Through this design, the device can judge whether the transformer shell 1 is eroded by judging whether the pressure sensor 1106 senses the pressure, so that the transformer shell 1 can be repaired before erosion occurs.
[0037] It should be noted that, in this text, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or apparatus that includes a list of elements not only includes those elements, but also includes other elements not expressly listed or inherent to such process, method, article or apparatus.
[0038] The principles and implementations of the present application are described herein with specific examples. The above examples are only used to help understand the method of the present application and its core idea. The above description is only the preferred embodiment of the present application. It should be noted that due to the limitation of language expression, there are infinite specific structures objectively. For ordinary skilled persons in the art, without departing from the principles of the present application, some improvements, refinements or changes can be made, and the above technical features can be combined in an appropriate way. These improvements, refinements, changes or combinations, or the application of the concept and technical solution of the present application to other occasions without improvement, shall be regarded as the protection scope of the present application.
Claims
1. A transformer with an oil-leakage-proof seal, characterized in that, The transformer includes a transformer housing (1), a return current assembly (7), and a heat dissipation assembly (11). First heat dissipation fins (2) are installed at both the front and rear ends of the transformer housing (1). A working cavity (3) is opened at the top of the transformer housing (1), and an iron core coil (4) is installed inside the working cavity (3). High and low voltage bushings (5) are installed at the outer top end of the transformer housing (1). A return current cavity (6) is opened at the inner bottom side of the transformer housing (1), and a return current assembly (7) is installed inside the return current cavity (6). The return current assembly (7) includes a first electromagnet (701), and an armature block is installed at the outer top end of the first electromagnet (701). 702), and a return spring (703) is installed between the armature block (702) and the transformer housing (1). A return groove (704) is opened on the inner side of the armature block (702). A through groove (8) is opened on the inner side of the transformer housing (1). A heat insulation plate (9) is installed on the outer end of the transformer housing (1). A one-way outlet pipe (10) is connected to the end of the through groove (8). A heat dissipation component (11) is installed on the outer end of the transformer housing (1). A return port (12) is opened between the transformer housing (1) and the heat insulation plate (9). A one-way inlet pipe (13) is connected to one end of the return port (12).
2. The transformer with an oil-leakage-proof seal according to claim 1, characterized in that, The first electromagnet (701) is electromagnetically attracted to the armature block (702), and the armature block (702) is elastically connected to the transformer housing (1) through the return spring (703).
3. The transformer with an oil-leakage-proof seal according to claim 1, characterized in that, The outer contour of the armature block (702) matches the inner wall contour of the transformer housing (1), and the gap at the connection between the armature block (702) and the transformer housing (1) is sealed with a sealing strip.
4. The transformer with an oil-leakage-proof seal according to claim 1, characterized in that, When the first electromagnet (701) is de-energized, the armature block (702) is pushed upward by the return spring (703), and the upward movement of the armature block (702) connects the return groove (704) with the working chamber (3).
5. A transformer with an oil-leakage-proof seal according to claim 1, characterized in that, The return channel (704) is S-shaped, and the armature block (702) moves upward to connect the return channel (704) with the through channel (8).
6. A transformer with an oil-leakage-proof seal according to claim 1, characterized in that, The heat dissipation assembly (11) includes a heat dissipation box (1101), a motor (1102) is installed at the outer end of the heat dissipation box (1101), and an agitator (1103) is installed inside the heat dissipation box (1101). A fixing cover (1104) is installed at the bottom inner side of the heat dissipation box (1101), and a pressure spring (1105) and a pressure sensor (1106) are installed inside the fixing cover (1104). A second electromagnet (1107) is installed at the top outer end of the pressure spring (1105), and second heat dissipation fins (1108) are installed at both outer ends of the heat dissipation box (1101).
7. A transformer with an oil-leakage-proof seal according to claim 6, characterized in that, The through slot (8) is connected to the heat sink (1101) through the one-way outlet pipe (10), and the heat sink (1101) is connected to the one-way inlet pipe (13) through the return port (12).
8. A transformer with an oil-leakage-proof seal according to claim 6, characterized in that, The motor (1102) drives the agitator (1103) to rotate, and the vertical center line of the agitator (1103) coincides with the vertical center line of the heat sink (1101).
9. A transformer with an oil-leakage-proof seal according to claim 6, characterized in that, The inner contour of the fixed cover (1104) matches the outer contour of the second electromagnet (1107), and the second electromagnet (1107) is elastically connected to the pressure spring (1105).
10. A transformer with an oil-leakage-proof seal according to claim 6, characterized in that, The second electromagnet (1107) attracts too much metal debris, and the weight lifts the pressure spring (1105) to move downward. The second electromagnet (1107) moves downward and comes into contact with the pressure sensor (1106).