Safe power transformer

Abstract

The invention relates to the technical field of power transformers, and discloses a safe power transformer which comprises a box body, a heat dissipation plate is fixedly assembled on the outer wall of the box body, a pressure release assembly is arranged at the top of the box body, and a contact column is fixedly assembled at the top of the box body. According to the safe power transformer, when the pressure in the inner cavity of the box body is increased sharply, the pressure plate can be pushed upwards, so that the pressure plate moves upwards along the inner wall of the pressure relief pipe, when the pressure plate crosses the oil discharge pipe, insulating oil can quickly enter the oil discharge pipe from the pressure relief pipe to be released, and when the pressure relief pipe is installed, the insulating oil can be quickly released. The stroke of the driving spring can be adjusted according to the magnitude of the pressure borne by the box body, so that the downward pressure of the pressure plate is changed, and when pressure relief is achieved, the ejector rod and the lifting plate are pushed to move upwards in the upward movement process of the pressure plate, so that a wire is pulled out of the contact column, power failure of equipment is achieved, and the safety of the equipment is further ensured. And deflagration is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power transformers, and specifically relates to a safe power transformer. Background Art

[0002] A power transformer is a static electrical device used to convert an alternating voltage (current) of a certain value into another or several different values of voltage (current) with the same frequency. It is a static device with two or more windings. Among them, oil-immersed power transformers are more suitable for the transformation of urban and rural, industrial and mining enterprise power grids, and are more suitable for transformers used in combined transformers and prefabricated substations.

[0003] When traditional oil-immersed power transformer equipment is in use, a large amount of insulating oil is filled in the inner cavity of the oil-immersed power transformer. To ensure the stable operation of the equipment, a pressure relief pipe is often set at the top of the power transformer, which can release the insulating oil inside the transformer outward in a timely manner in case of an emergency. Traditional pressure relief pipes often have a film installed at the top. When the internal pressure of the transformer surges, the insulating oil will break through the film to relieve the pressure of the transformer. Traditional films need to be customized according to the pressure borne by the transformer during installation and use in order to relieve the pressure in the first time in case of danger. Moreover, after the film is broken, it cannot be reused and the pressure relief pipe needs to be reinstalled, resulting in many limitations in the use of traditional pressure relief pipes and being more inconvenient to use. Summary of the Invention

[0004] The present invention provides a safe power transformer, which solves the problems raised in the above background art.

[0005] The present invention provides the following technical solution: A safe power transformer includes a box body. A heat dissipation plate is fixedly assembled on the outer wall of the box body. A pressure release assembly is provided at the top of the box body. A contact column is fixedly assembled on the top of the box body. A wire is installed on the outer wall of the contact column. A push-pull assembly is provided at the top of the pressure release assembly. An oil discharge assembly is provided at the top of the box body. A connection hole is opened on the outer wall of the box body. A support base is installed at the bottom of the box body.

[0006] As a preferred technical solution of the present invention: The pressure release assembly includes a pressure relief pipe. A fixed groove is opened in the inner cavity of the pressure relief pipe. A moving groove is opened in the inner cavity of the pressure relief pipe. A fixed rod is fixedly assembled on the inner wall of the fixed groove. A moving plate is movably sleeved on the outer wall of the fixed rod. A pressure plate is fixedly assembled on the outer wall of the moving plate. A driving spring is movably sleeved on the outer wall of the fixed rod. A lower pressure plate is movably sleeved on the outer wall of the fixed rod. A pushing plate is fixedly assembled on the outer wall of the lower pressure plate. An adjusting nut is threadedly connected to the outer wall of the fixed rod. A fixed cylinder is installed at the top of the pressure relief pipe. An oil discharge pipe is fixedly assembled on the outer wall of the pressure relief pipe.

[0007] As a preferred technical solution of the present invention: the inner wall diameter of the fixed groove is larger than the inner wall diameter of the moving groove. The two ends of the outer wall of the driving spring are respectively in contact with the outer walls of the moving plate and the lower pressing plate, and the driving spring is made of high carbon steel. The outer wall of the pushing plate passes through the inner cavity of the pressure relief pipe and is connected to the outer wall of the lower pressing plate. The inner cavity of the oil discharge pipe communicates with the inner cavity of the fixed groove, and the inner cavity of the pressure relief pipe communicates with the inner cavity of the box body.

[0008] As a preferred technical solution of the present invention: the push-pull assembly includes a top rod, an installation plate is fixedly assembled on the outer wall of the top rod, a lifting plate is installed on the outer wall of the installation plate, and a fixing hole is formed in the outer wall of the lifting plate.

[0009] As a preferred technical solution of the present invention: the outer wall of the top rod passes through the inner cavity of the fixed cylinder and is connected to the outer wall of the moving plate, and the outer wall diameter of the top rod is equal to the inner wall diameter of the fixed cylinder. The inner wall diameter of the fixing hole is equal to the outer wall diameter of the wire, and the inner wall of the fixing hole is connected to the outer wall of the wire.

[0010] As a preferred technical solution of the present invention: the oil discharge assembly includes an installation frame, an oil pillow is fixedly assembled on the outer wall of the installation frame, a connecting pipe is installed on the outer wall of the oil pillow, a breather is installed on the outer wall of the connecting pipe, an inner cylinder is fixedly assembled at the bottom of the breather, an outer cylinder is installed at the bottom of the breather, ventilation holes are formed in the outer wall of the outer cylinder, a limiting rod is fixedly assembled on the outer wall of the outer cylinder, a lifting ring is movably sleeved on the outer wall of the limiting rod, a connecting rod is fixedly assembled on the outer wall of the lifting ring, a cleaning plate is fixedly assembled on the outer wall of the connecting rod, a lifting frame is fixedly assembled on the outer wall of the lifting ring, a driving motor is fixedly assembled on the outer wall of the lifting frame, and a driving screw is fixedly assembled on the power output shaft of the driving motor.

[0011] As a preferred technical solution of the present invention: the inner wall diameter of the ventilation hole is equal to the outer wall diameter of the cleaning plate, the outer wall diameter of the connecting rod is smaller than the inner wall diameter of the ventilation hole, and the outer wall of the driving screw is in threaded connection with the inner wall of the lifting frame.

[0012] As a preferred technical solution of the present invention: the inner cavity of the connecting pipe communicates with the inner cavity of the oil pillow, the inner cavity of the oil pillow communicates with the inner cavity of the box body, and the outer wall length of the connecting rod is greater than the inner cavity depth of the ventilation hole.

[0013] As a preferred technical solution of the present invention: the inner cavity of the breather is filled with water-absorbing silica gel, and the inner cavity of the inner cylinder communicates with the inner cavity of the breather.

[0014] As a preferred technical solution of the present invention: there are two limiting rods, and the two limiting rods are respectively installed on both sides of the outer wall of the outer cylinder, and the cleaning plate is made of natural rubber.

[0015] The present invention has the following beneficial effects:

[0016] 1. For this safety power transformer, through the pressure relief pipe provided at the bottom of the box body and the pressure plate provided in the inner cavity of the pressure relief pipe, when the pressure in the inner cavity of the box body surges, it will push the pressure plate upward, so that the pressure plate moves upward along the inner wall of the pressure relief pipe. When the pressure plate crosses the oil discharge pipe, the insulating oil will quickly enter the oil discharge pipe from the pressure relief pipe to release the insulating oil, enabling the insulating oil in the box body to be quickly released. And when installing the pressure relief pipe, the stroke of the driving spring can be adjusted according to the pressure borne by the box, so as to change the downward pressure of the pressure plate, so that the pressure relief pipe can be applied to more transformers of different sizes. And when realizing pressure relief, during the upward movement of the pressure plate, it will push the ejector rod and the lifting plate upward, so as to pull the wire off the contact post to cut off the power supply of the equipment, further ensuring the safety of the equipment and preventing it from exploding and burning.

[0017] 2. For this safety power transformer, through the connecting rod and the cleaning plate provided on the outer wall of the outer cylinder, under the action of the driving motor, the lifting frame can be driven to move downward along the outer wall of the limiting rod. At this time, the inner wall of the ventilation hole can be cleaned under the action of the cleaning plate, so that the stains attached to the inner wall of the ventilation hole can be scraped off under the action of the cleaning plate, preventing the ventilation hole from being blocked, enabling the equipment to intake and exhaust air normally, and thus better protecting the oil liquid in the oil conservator cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 is a structural schematic diagram of the box body of the present invention;

[0020] Figure 3 is a structural schematic diagram of the support base of the present invention;

[0021] Figure 4 is a sectional structural schematic diagram of the box body of the present invention;

[0022] Figure 5 is a structural schematic diagram of the pressure relief pipe of the present invention;

[0023] Figure 6 is a sectional structural schematic diagram of the pressure relief pipe of the present invention;

[0024] Figure 7 is a structural schematic diagram of the ejector rod of the present invention;

[0025] Figure 8 Schematic diagram of the conservator structure of the present invention;

[0026] Figure 9 Schematic diagram of the breather structure of the present invention;

[0027] Figure 10 Schematic diagram of the lifting frame structure of the present invention.

[0028] In the figure: 1, box body; 2, heat dissipation plate; 3, pressure release assembly; 4, contact column; 5, wire; 6, push-pull assembly; 7, oil drain assembly; 8, connection hole; 9, support base;

[0029] 301, pressure relief pipe; 302, fixed groove; 303, moving groove; 304, fixed rod; 305, moving plate; 306, pressure plate; 307, driving spring; 308, lower pressing plate; 309, pushing plate; 3010, adjusting nut; 3011, fixed cylinder; 3012, drain pipe;

[0030] 601, ejector rod; 602, mounting plate; 603, lifting plate; 604, fixing hole;

[0031] 701, mounting frame; 702, conservator; 703, connecting pipe; 704, breather; 705, inner cylinder; 706, outer cylinder; 707, ventilation hole; 708, limiting rod; 709, lifting ring; 7010, connecting rod; 7011, cleaning plate; 7012, lifting frame; 7013, driving motor; 7014, driving screw. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figure 1 - Figure 10 , a safe power transformer, including a box body 1, a heat dissipation plate 2 is fixedly assembled on the outer wall of the box body 1, a pressure release assembly 3 is arranged on the top of the box body 1, a contact column 4 is fixedly assembled on the top of the box body 1, a wire 5 is installed on the outer wall of the contact column 4, a push-pull assembly 6 is arranged on the top of the pressure release assembly 3, an oil drain assembly 7 is arranged on the top of the box body 1, a connection hole 8 is opened on the outer wall of the box body 1, and a support base 9 is installed at the bottom of the box body 1.

[0034] In the above structure, through the contact post 4 installed on the top of the box body 1 and the wire 5 arranged on the top of the contact post 4, under the action of the wire 5, electric power can be transmitted to the outer wall of the contact post 4, and under the action of the contact post 4, the external current is connected to the winding in the inner cavity of the box body 1 to realize the boosting of electric power.

[0035] In a preferred embodiment: The pressure release assembly 3 includes a pressure relief pipe 301. A fixed groove 302 is formed in the inner cavity of the pressure relief pipe 301, and a moving groove 303 is formed in the inner cavity of the pressure relief pipe 301. A fixed rod 304 is fixedly assembled on the inner wall of the fixed groove 302. A moving plate 305 is movably sleeved on the outer wall of the fixed rod 304. A pressure plate 306 is fixedly assembled on the outer wall of the moving plate 305. A driving spring 307 is movably sleeved on the outer wall of the fixed rod 304. A lower pressing plate 308 is movably sleeved on the outer wall of the fixed rod 304. A pushing plate 309 is fixedly assembled on the outer wall of the lower pressing plate 308. An adjusting nut 3010 is threadedly connected to the outer wall of the fixed rod 304. A fixed cylinder 3011 is installed on the top of the pressure relief pipe 301. An oil discharge pipe 3012 is fixedly assembled on the outer wall of the pressure relief pipe 301.

[0036] In the above structure, through the fixed rod 304 arranged in the inner cavity of the pressure relief pipe 301 and the driving spring 307 and the moving plate 305 arranged on the outer wall of the fixed rod 304, under the action of the driving spring 307, the moving plate 305 can be supported, so that the outer wall of the pressure plate 306 can be located in the inner cavity of the moving groove 303 to block the inner cavity of the moving groove 303 and prevent the inner cavity of the moving groove 303 from communicating with the outside. And when the pressure in the inner cavity of the box body 1 surges, the pressure plate 306 can move upward along the inner wall of the moving groove 303, so that the insulating oil in the inner cavity of the box body 1 is released outward through the oil discharge pipe 3012.

[0037] In a preferred embodiment: The inner wall diameter of the fixed groove 302 is larger than the inner wall diameter of the moving groove 303. The two ends of the outer wall of the driving spring 307 are respectively in contact with the outer walls of the moving plate 305 and the lower pressing plate 308, and the driving spring 307 is made of high carbon steel. The outer wall of the pushing plate 309 passes through the inner cavity of the pressure relief pipe 301 and is connected to the outer wall of the lower pressing plate 308. The inner cavity of the oil discharge pipe 3012 is communicated with the inner cavity of the fixed groove 302. The inner cavity of the pressure relief pipe 301 is communicated with the inner cavity of the box body 1.

[0038] In the above structure, through the arranged fixed rod 304 and the driving spring 307 arranged on the outer wall of the fixed rod 304, when it is necessary to adjust the stroke of the driving spring 307, by rotating the adjusting nut 3010, the pushing plate 309 is driven under the action of the adjusting nut 3010, so that the pushing plate 309 moves downward along the inner wall of the pressure relief pipe 301, thereby pushing the lower pressing plate 308 to move, and further compressing the driving spring 307, so that the stroke of the driving spring 307 is compressed, and thus the thrust of the driving spring 307 acting on the outer wall of the moving plate 305 is further increased.

[0039] In a preferred embodiment: The push-pull assembly 6 includes a push rod 601, an installation plate 602 is fixedly assembled on the outer wall of the push rod 601, a lifting plate 603 is installed on the outer wall of the installation plate 602, and a fixing hole 604 is formed in the outer wall of the lifting plate 603.

[0040] In the above structure, through the arranged push rod 601, and the outer wall of the push rod 601 is connected to the outer wall of the moving plate 305. When the internal pressure of the box body 1 surges, it will push the insulating oil into the inner cavity of the pressure relief pipe 301, and push the pressure plate 306 and the moving plate 305 to move, thereby realizing the driving of the push rod 601, so that the push rod 601 moves upward along the inner cavity of the fixed cylinder 3011.

[0041] In a preferred embodiment: The outer wall of the push rod 601 passes through the inner cavity of the fixed cylinder 3011 and is connected to the outer wall of the moving plate 305, and the outer wall diameter of the push rod 601 is equal to the inner wall diameter of the fixed cylinder 3011. The inner wall diameter of the fixing hole 604 is equal to the outer wall diameter of the wire 5, and the inner wall of the fixing hole 604 is connected to the outer wall of the wire 5.

[0042] In the above structure, through the installation plate 602 and the lifting plate 603 arranged on the outer wall of the push rod 601, when the push rod 601 moves upward along the inner cavity of the fixed cylinder 3011 under the action of the insulating oil, the lifting plate 603 will be pushed to move during the upward movement of the push rod 601. At this time, the wire 5 can be separated from the outer wall of the contact post 4 under the action of the lifting plate 603, realizing the power-off operation of the box body 1.

[0043] In a preferred embodiment: The oil draining assembly 7 includes a mounting frame 701. An oil conservator 702 is fixedly assembled on the outer wall of the mounting frame 701. A connecting pipe 703 is installed on the outer wall of the oil conservator 702. A breather 704 is installed on the outer wall of the connecting pipe 703. An inner cylinder 705 is fixedly assembled at the bottom of the breather 704. An outer cylinder 706 is installed at the bottom of the breather 704. Vent holes 707 are formed on the outer wall of the outer cylinder 706. A limiting rod 708 is fixedly assembled on the outer wall of the outer cylinder 706. A lifting ring 709 is movably sleeved on the outer wall of the limiting rod 708. A connecting rod 7010 is fixedly assembled on the outer wall of the lifting ring 709. A cleaning plate 7011 is fixedly assembled on the outer wall of the connecting rod 7010. A lifting frame 7012 is fixedly assembled on the outer wall of the lifting ring 709. A driving motor 7013 is fixedly assembled on the outer wall of the lifting frame 7012. A driving screw rod 7014 is fixedly assembled on the power output shaft of the driving motor 7013.

[0044] In the above structure, through the connecting pipe 703 provided on the outer wall of the oil conservator 702 and the breather 704 provided at the bottom of the connecting pipe 703, during the normal use of the oil conservator 702, the air in its inner cavity will be discharged outward as the volume of the insulating oil increases, so that the air in the inner cavity of the oil conservator 702 will be discharged outward through the breather 704. And when the temperature of the insulating oil drops and its volume shrinks, the outside air will be inhaled into the inner cavity of the oil conservator 702 through the breather 704, and under the action of the water-absorbing silica gel in the inner cavity of the oil conservator 702, water vapor in the air is prevented from entering the insulating oil, thereby avoiding the deterioration of the insulating oil.

[0045] In a preferred embodiment: The inner wall diameter of the vent hole 707 is equal to the outer wall diameter of the cleaning plate 7011. The outer wall diameter of the connecting rod 7010 is smaller than the inner wall diameter of the vent hole 707. The outer wall of the driving screw rod 7014 is threadedly connected to the inner wall of the lifting frame 7012.

[0046] In the above structure, through the vent holes 707 formed on the outer wall of the outer cylinder 706, when the oil conservator 702 exhausts and inhales air, the outside air will enter the inner cavity of the outer cylinder 706 through the vent holes 707. When the inner cavity of the vent holes 707 is blocked, it will cause poor air intake and exhaust. By starting the driving motor 7013, the driving motor 7013 drives the rotation of the driving screw rod 7014. During the rotation of the driving screw rod 7014, the lifting frame 7012 can be driven, so that the lifting ring 709 moves downward along the outer wall of the limiting rod 708. During the downward movement of the lifting ring 709, the outer wall of the cleaning plate 7011 will scrape the inner wall of the vent hole 707, and scrape off the sundries attached to the inner wall of the vent hole 707.

[0047] In a preferred embodiment: The inner cavity of the connecting pipe 703 communicates with the inner cavity of the oil conservator 702, the inner cavity of the oil conservator 702 communicates with the inner cavity of the box body 1, and the outer wall length of the connecting rod 7010 is greater than the inner cavity depth of the ventilation hole 707.

[0048] In the above structure, through the connecting rod 7010 provided on the outer wall of the lifting ring 709, by adjusting the position of the lifting ring 709, the outer wall of the lifting ring 709 is not in contact with the outer wall of the outer cylinder 706. At this time, the cleaning plate 7011 is not in the inner cavity of the ventilation hole 707, ensuring that the lifting ring 709 and the cleaning plate 7011 will not block the inner cavity of the ventilation hole 707, thereby ensuring the normal flow of air.

[0049] In a preferred embodiment: The inner cavity of the breather 704 is filled with water-absorbing silica gel, and the inner cavity of the inner cylinder 705 communicates with the inner cavity of the breather 704.

[0050] In the above structure, through the water-absorbing silica gel filled in the inner cavity of the breather 704, after the outside air enters the inner cavity of the outer cylinder 706 through the ventilation hole 707, it can enter the inner cavity of the breather 704 through the inner cylinder 705. At this time, under the action of the water-absorbing silica gel in the inner cavity of the breather 704, the moisture in the air can be absorbed, preventing the moisture in the air from entering the insulating oil and causing the insulating oil to deteriorate.

[0051] In a preferred embodiment: There are two limiting rods 708, and the two limiting rods 708 are respectively installed on both sides of the outer wall of the outer cylinder 706, and the cleaning plate 7011 is made of natural rubber.

[0052] In the above structure, through the limiting rods 708 provided on both sides of the outer wall of the outer cylinder 706, the movement of the lifting ring 709 can be restricted under the action of the limiting rods 708, so that the lifting ring 709 can only move back and forth along the outer wall of the limiting rods 708, thereby better enabling the cleaning plate 7011 to move downward along the inner wall of the ventilation hole 707 to clean the inner wall of the ventilation hole 707.

[0053] Working principle: During the use of the above device, when the box body 1 is in normal use, the temperature and pressure inside it are within the normal range. At this time, under the action of the driving spring 307, elastic force is applied to the outer wall of the moving plate 305, causing the moving plate 305 to tend to move downward along the outer wall of the fixed rod 304. As a result, the outer wall of the pressure plate 306 is located in the inner cavity of the moving groove 303, blocking the inner cavity of the moving groove 303, thus ensuring that the inner cavity of the box body 1 is separated from the external environment. Once a dangerous situation occurs in the inner cavity of the box body 1, the pressure and temperature inside it will surge. Since the inner cavity of the box body 1 is connected to the inner cavity of the pressure relief pipe 301, at this time, the pressure plate 306 can be pushed to move upward along the inner wall of the moving groove 303 under the action of the pressure. When the outer wall of the pressure plate 306 crosses the outer wall of the drain pipe 3012, since the inner cavities of the pressure relief pipe 301 and the drain pipe 3012 are connected, the insulating oil in the inner cavity of the box body 1 can be released outward through the drain pipe 3012 immediately, avoiding explosion caused by excessive pressure in the inner cavity of the box body 1. Moreover, when installing the pressure relief pipe 301, the maximum pressure borne by the pressure plate 306 can be adjusted according to the volume of the inner cavity of the box body 1. By rotating the adjusting nut 3010, the push plate 309 and the lower pressing plate 308 are driven under the action of the adjusting nut 3010 to move downward along the inner cavity of the pressure relief pipe 301, so as to adjust the stroke of the driving spring 307, thereby realizing the adjustment of the pressure borne by the pressure plate 306. When the breather 704 is in normal use, there is some insulating oil in the inner cavity of the outer cylinder 706. With continuous intake and exhaust, the insulating oil will splash, resulting in oil adhering to the inner wall of the air vent 707. After contacting the air, a large amount of dust in the air will adhere to the inner wall of the air vent 707, causing the inner cavity of the air vent 707 to be blocked. By starting the driving motor 7013, the driving motor 7013 drives the rotation of the driving screw 7014. During the rotation of the driving screw 7014, the lifting frame 7012 can be driven, causing the lifting frame 7012 to move downward along the outer wall of the limiting rod 708, so that the cleaning plate 7011 moves downward from the inner wall of the air vent 707, scraping the stains adhering to the inner wall of the air vent 707 downward, realizing the dredging of the inner cavity of the air vent 707, thus ensuring normal intake and exhaust and the normal use of the breather 704.

[0054] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0055] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety power transformer, comprising a box body, characterized in that: A heat dissipation plate is fixedly assembled on the outer wall of the box body. A pressure release component is arranged on the top of the box body. A contact column is fixedly assembled on the top of the box body. A wire is installed on the outer wall of the contact column. A push-pull component is arranged on the top of the pressure release component. An oil drain component is arranged on the top of the box body. A connection hole is formed in the outer wall of the box body. A support base is installed at the bottom of the box body.

2. The safety power transformer according to claim 1, wherein: The pressure release component includes a pressure relief pipe. A fixed groove is formed in the inner cavity of the pressure relief pipe. A moving groove is formed in the inner cavity of the pressure relief pipe. A fixed rod is fixedly assembled on the inner wall of the fixed groove. A moving plate is movably sleeved on the outer wall of the fixed rod. A pressure plate is fixedly assembled on the outer wall of the moving plate. A driving spring is movably sleeved on the outer wall of the fixed rod. A lower pressing plate is movably sleeved on the outer wall of the fixed rod. A pushing plate is fixedly assembled on the outer wall of the lower pressing plate. An adjusting nut is threadedly connected to the outer wall of the fixed rod. A fixed cylinder is installed on the top of the pressure relief pipe. An oil drain pipe is fixedly assembled on the outer wall of the pressure relief pipe.

3. The safety power transformer according to claim 2, wherein: The inner wall diameter of the fixed groove is larger than the inner wall diameter of the moving groove. The two ends of the outer wall of the driving spring are respectively in contact with the outer walls of the moving plate and the lower pressing plate, and the driving spring is made of high carbon steel. The outer wall of the pushing plate passes through the inner cavity of the pressure relief pipe and is connected to the outer wall of the lower pressing plate. The inner cavity of the oil drain pipe is communicated with the inner cavity of the fixed groove. The inner cavity of the pressure relief pipe is communicated with the inner cavity of the box body.

4. A safety power transformer according to claim 2, characterized in that: The push-pull component includes a top rod. A mounting plate is fixedly assembled on the outer wall of the top rod. A lifting plate is installed on the outer wall of the mounting plate. A fixing hole is formed in the outer wall of the lifting plate.

5. A safety power transformer according to claim 4, characterized in that: The outer wall of the top rod passes through the inner cavity of the fixed cylinder and is connected to the outer wall of the moving plate, and the outer wall diameter of the top rod is equal to the inner wall diameter of the fixed cylinder. The inner wall diameter of the fixing hole is equal to the outer wall diameter of the wire, and the inner wall of the fixing hole is connected to the outer wall of the wire.

6. A safety power transformer according to claim 4, characterized in that: The oil drain component includes a mounting frame. An oil pillow is fixedly assembled on the outer wall of the mounting frame. A connecting pipe is installed on the outer wall of the oil pillow. A breather is installed on the outer wall of the connecting pipe. An inner cylinder is fixedly assembled at the bottom of the breather. An outer cylinder is installed at the bottom of the breather. Vent holes are formed in the outer wall of the outer cylinder. A limiting rod is fixedly assembled on the outer wall of the outer cylinder. A lifting ring is movably sleeved on the outer wall of the limiting rod. A connecting rod is fixedly assembled on the outer wall of the lifting ring. A cleaning plate is fixedly assembled on the outer wall of the connecting rod. A lifting frame is fixedly assembled on the outer wall of the lifting ring. A driving motor is fixedly assembled on the outer wall of the lifting frame. A driving screw rod is fixedly assembled on the power output shaft of the driving motor.

7. A safety power transformer according to claim 6, characterized in that: The inner wall diameter of the vent hole is equal to the outer wall diameter of the cleaning plate. The outer wall diameter of the connecting rod is smaller than the inner wall diameter of the vent hole. The outer wall of the driving screw rod is threadedly connected to the inner wall of the lifting frame.

8. The safety power transformer according to claim 7, wherein: The inner cavity of the connecting pipe is communicated with the inner cavity of the oil pillow. The inner cavity of the oil pillow is communicated with the inner cavity of the box body. The outer wall length of the connecting rod is greater than the inner cavity depth of the vent hole.

9. A safety power transformer according to claim 8, characterized in that: The inner cavity of the breather is filled with water-absorbing silica gel. The inner cavity of the inner cylinder is communicated with the inner cavity of the breather.

10. A safety power transformer according to claim 9, characterized in that: There are two limiting rods, and the two limiting rods are respectively installed on both sides of the outer wall of the outer cylinder. The cleaning plate is made of natural rubber.

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