Oil conservator for oil-immersed transformer and using method

Abstract

The invention relates to the field of oil conservators, in particular to an oil conservator for an oil-immersed transformer and a using method.The oil conservator comprises an oil tank shell, oil injection and drainage pipe connectors are fixedly installed at the two ends of the oil tank shell, dirt collecting boxes are symmetrically and fixedly installed at the bottom of the oil tank shell, and a push plate is slidably installed in the oil tank shell; and capsules are fixedly mounted on the two sides of the push plate. According to the oil conservator for the oil-immersed transformer, due to the arrangement of the push plate, the oil squeezing mechanism, the capsule and other components, oil can be rapidly squeezed into the oil-immersed transformer through the oil injection and drainage pipe connector, so that the cooling speed of insulating oil in the transformer is increased, and safe and stable operation of the transformer is guaranteed; and after the oil at one end of the oil tank shell enters the transformer, the overheated oil in the transformer enters the other end of the oil tank shell through the oil injection and drainage pipe connector at the other end of the oil tank shell to be cooled.

Description

Technical Field

[0001] The present invention relates to the field of oil conservators, in particular to an oil conservator for an oil-immersed transformer and a use method thereof. Background Art

[0002] The transformer oil conservator is an important component of oil-immersed transformers. It is mainly used to compensate for the volume expansion or contraction of the insulating oil caused by temperature changes, and to isolate the insulating oil from air and moisture as much as possible to prevent the insulating oil from absorbing moisture or being oxidized. Among them, the capsule oil conservator is a commonly used type of oil conservator in oil-immersed transformers. It mainly installs a sealed rubber capsule that can withstand high pressure inside the oil conservator. This capsule forms a sealed structure with the outer shell to isolate the air. The capsule compensates for the volume expansion or contraction of the insulating oil caused by temperature changes by expanding and contracting. The inner cavity of the capsule is connected to the atmosphere through a respirator.

[0003] Existing patent CN118737641B discloses a transformer oil conservator, comprising a cabinet body and capsules, as well as guide rails and hook assemblies. A mounting tube is provided at the top of the cabinet body for removing and placing the guide rails and capsules from the cabinet body, and fixed brackets are symmetrically provided on the left and right sides of the cabinet body. Four guide rails are mounted in an X-shape around the mounting tube within the cabinet body. Each guide rail is L-shaped and includes a main rod and an auxiliary rod. The head end of the auxiliary rod is detachably connected to the mounting tube, and the tail end of the main rod is detachably connected to the fixed bracket. The guide rails have a slideway that connects from the head end of the auxiliary rod to the tail end of the main rod. Multiple mounting buckles are slidably mounted within the slideway. The outer surface of the capsule is provided with hook assemblies corresponding to each guide rail. Each hook assembly includes multiple hangers that correspond one-to-one with the mounting buckles and are detachably connected to the mounting buckles. This transformer oil conservator has good stability and is easy to install and replace capsules.

[0004] During the implementation of this solution, the inventors discovered that the following problems existed in the prior art and had not been adequately addressed: 1. When the above-mentioned existing transformer oil conservator is used in conjunction with a transformer, as the temperature of the insulating oil in the transformer rises, the oil gradually expands in volume and is transported from the oil filling and discharge pipe interface to the oil conservator. This results in a relatively slow oil transport process, which cannot quickly reduce the temperature in the transformer and affects the transformer's cooling efficiency;

[0005] 2. In addition, due to factors such as long-term oil seepage or large-scale oil leakage of the transformer, the amount of oil inside the oil tank will gradually decrease, and the oil tank cannot be replenished in time. Operators are required to check the oil level in the oil tank regularly, which further increases the workload of operators. Summary of the Invention

[0006] The present invention aims to provide an oil conservator for an oil-immersed transformer and a method of use thereof, in order to address the problems raised in the above-mentioned background art. To achieve the above-mentioned object, the present invention provides the following technical solution: an oil conservator for an oil-immersed transformer, comprising an oil tank housing, with oil filling and discharge pipe interfaces fixedly mounted at both ends of the oil tank housing, a push plate slidably mounted within the oil tank housing, and capsules fixedly mounted on both sides of the push plate;

[0007] An oil squeezing mechanism for delivering oil to the oil-immersed transformer is provided between the upper end of the push plate and the two capsules;

[0008] The oil squeezing mechanism includes: a guide rail, which is fixedly mounted on the top wall of the oil tank shell, the middle part of the upper end of the push plate is slidably mounted on the surface of the guide rail, a linear motor is movably mounted on the surface of the guide rail, and one side of the linear motor is fixedly connected to the surface of the push plate, a first movable rod is fixedly mounted in the horizontal direction on the upper end of the guide rail, and the first movable rod is arranged through the upper end of the push plate, a T-shaped connecting cavity is provided on one side of the upper end of the push plate, a connecting hole is provided on one side of the upper end of the capsule, and the connecting hole is connected to one side of the lower end of the T-shaped connecting cavity, the upper end of the T-shaped connecting cavity is fixedly connected to a connecting hose, and the connecting hose is wrapped around the surface of the first movable rod, one end of the connecting hose is fixedly mounted with an air pipe, and the air pipe extends to the outside of the oil tank shell, and one end of the air pipe is fixedly mounted with a respirator.

[0009] Preferably, a dirt collecting box is symmetrically fixedly installed on the bottom of the fuel tank shell, and the two dirt collecting boxes are located on both sides of the push plate. An oil replenishing mechanism for replenishing oil inside the fuel tank shell is provided between the surface of the upper end of the push plate and the top of the fuel tank shell.

[0010] Preferably, movable grooves are formed on the surfaces of the upper and lower ends of the first movable rod, and a plurality of movable rings are equidistantly and slidably installed inside the movable grooves, and the outer walls of the movable rings are fixedly connected to the surface of the connecting hose.

[0011] Preferably, the oil replenishing mechanism includes a push block, two of the push blocks are provided, and the two push blocks are symmetrically fixedly mounted on both sides of the upper end of the push plate, one end of the push block is hingedly mounted with a first hinge rod, and one end of the first hinge rod is hingedly mounted with a moving block, the top of the moving block is movably mounted on the top wall of the oil tank shell, the top of the moving block is hingedly mounted with a second hinge rod, and the top of one end of the second hinge rod is movably mounted on the top wall of the oil tank shell, a pressure rod is rotatably mounted inside the lower end of the moving block, and one end of the pressure rod is placed on the surface of the adjacent capsule;

[0012] The top of the oil tank shell is fixedly provided with a mounting cylinder symmetrically, and the interior of the mounting cylinder is movably installed with a piston rod in the vertical direction, and the two ends of the piston rod extend outside the mounting cylinder. The bottom of the piston rod is mounted on the surface of the adjacent pressure rod, and the surface of the piston rod is fitted with a first return spring, and the two ends of the first return spring are respectively fixedly installed between the surface of the piston rod and the top wall of the mounting cylinder. The top of the oil tank shell is fixedly installed with a mounting cylinder

[0013] Preferably, a rotating shaft is fixedly mounted on the top of the moving block and the top of one end of the second hinged rod, and a slider is fixedly connected to the top of the rotating shaft. A guide groove that cooperates with the adjacent slider is provided on the top wall of the fuel tank housing. The moving block and the second hinged rod are both slidably mounted in the guide groove of the top wall of the fuel tank housing through the slider, and one end of the first hinged rod and the other end of the second hinged rod are both rotatably mounted on the rotating shaft at the top of the moving block.

[0014] Preferably, a cavity is opened inside the lower end of the moving block, a rotating rod is fixedly installed on one side of the pressure rod, and one end of the rotating rod is rotatably installed in the cavity at the lower end of the moving block, and a torsion spring is installed between the surface of one end of the rotating rod and the cavity at the lower end of the moving block.

[0015] The top of the guide wheel assembly is fixedly mounted on the top wall of the oil tank shell, and one end of the guide wheel is fixedly mounted on the inside of the oil tank shell, and a third return spring is mounted on the upper end of the guide wheel assembly, and the other end of the third return spring is fixedly mounted on the second end of the oil tank shell.

[0016] Both ends of the lifting plate are hingedly installed with a pull rod, and one end of the pull rod is rotatably installed with a first rotating shaft, one end of the first rotating shaft is hingedly installed with a first V-shaped block, and one end of the first V-shaped block is rotatably installed with a fixed block, one end of the fixed block is fixedly installed on the inner wall of the oil tank shell, the other end of the first rotating shaft is hingedly installed with a second V-shaped block, one end of the second V-shaped block is rotatably installed with a flip cover, and both ends of the flip cover are rotatably installed with a second rotating shaft, and one end of the second rotating shaft is rotatably installed on the adjacent fixed block.

[0017] Preferably, a waist-shaped groove is provided inside one end of the pull rod, and the first rotating shaft is rotatably installed in the waist-shaped groove at one end of the pull rod.

[0018] A method for using an oil conservator for an oil-immersed transformer comprises the following steps:

[0019] S1. When the oil tank shell is used in conjunction with the oil-immersed transformer, when the oil temperature inside the transformer is too high, the linear motor starts and moves on the guide rail, thereby pushing the push plate toward one end of the oil tank shell, so that the capsule on the surface of one side of the push plate squeezes the oil at one end of the inside of the oil tank shell. At this time, the capsule on one side of the push plate can quickly squeeze the oil into the oil-immersed transformer through the oil filling and discharge pipe interface. After the oil at one end of the oil tank shell enters the transformer, the overheated oil in the transformer enters the interior of the other end of the oil tank shell through the oil filling and discharge pipe interface at the other end of the oil tank shell for cooling.

[0020] When the lifting plate is moved down into position, the flip cover completes a 180-degree flip, so that the flip cover seals the end of the oil filling and discharge pipe interface to prevent the oil squeezed into the transformer from flowing back.

[0021] S3. At the same time, when the capsule moves, the push rod at the other end of the oil tank shell releases the squeeze on the end of the second movable rod. Under the elastic reset of the second return spring, the second movable rod pulls the nylon rope to be in a taut state, thereby driving the lifting plate to move up, causing the third return spring to be squeezed and contracted. At the same time, the pull rods at both ends of the lifting plate pull the corresponding first V-block and second V-block to deflect and reset, causing the flip cover to flip upward 180 degrees with the second rotating shaft as the axis. At this time, the flip cover releases the blockage on the other end of the oil filling and discharge pipe interface, facilitating the overheated oil in the transformer to enter the oil tank shell for cooling.

[0022] When the oil level in the oil tank decreases significantly, the oil level stored in one end of the oil tank shell decreases. At this time, air enters the capsule, causing the capsule to expand. The capsule will squeeze and push the pressure rod on the adjacent side, causing the pressure rod to deflect. At this time, one end of the pressure rod deflects upward and squeezes and pushes the corresponding piston rod to move upward, causing the top of the piston rod to squeeze and push the normally open contact of the normally open button. At the same time, the infusion pump circuit is connected, and the infusion pump replenishes the oil in the storage cylinder from the oil pipe to the interior of the oil storage end of the oil tank shell, automatically replenishing the oil in the oil tank shell. When the oil is replenished to a certain amount, the liquid level rises, and the capsule exhausts air to the outside to ensure the balance of the internal pressure of the oil tank shell, and the volume of the capsule shrinks. When the capsule shrinks to a certain volume, it releases the squeeze on the pressure rod. At this time, the pressure rod deflects and resets under the action of the torsion spring, so that one end of the pressure rod releases the squeeze on the piston rod. At this time, the internal circuit of the normally open button is disconnected again, and the infusion pump stops delivering oil.

[0023] S5. When the push plate drives the capsule on one side to move away from the piston rod, so that the capsule in the oil replenishing area can expand to replenish oil, the capsule on the other side of the push plate will move closer to the corresponding piston rod. The push block on the upper end of the push plate will push the hinged first hinged rod to deflect, so that the first hinged rod drives the hinged moving block to move away from the piston rod. At this time, the pressure rod rotatably installed at the lower end of the moving block is not under the piston rod. When the pressure rod deflects, it will not squeeze the piston rod, so that the pressure rod in the oil squeezing area can avoid contact with the piston rod, preventing automatic oil replenishment in the oil squeezing area.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] In the present invention, by arranging components such as a push plate, an oil squeezing mechanism and a capsule, the oil can be quickly squeezed into the oil-immersed transformer through the oil filling and discharge pipe interface, so as to accelerate the cooling speed of the insulating oil inside the transformer and ensure the safe and stable operation of the transformer. After the oil at one end of the oil tank shell enters the transformer, the overheated oil in the transformer enters the interior of the other end of the oil tank shell through the oil filling and discharge pipe interface at the other end of the oil tank shell for cooling.

[0026] In the present invention, by setting up components such as the push plate and the oil replenishing mechanism, when the oil amount inside the oil tank shell is greatly reduced, the oil inside the oil tank shell can be automatically replenished, thereby increasing the functionality of the oil storage cabinet, thereby extending the inspection cycle of the oil in the oil tank and reducing the workload of the operators.

[0027] In the present invention, by arranging components such as a push plate and an opening and closing mechanism, after the push plate squeezes the oil at one end of the oil tank shell into the transformer, the flap automatically completes a 180-degree flip to seal the end of the oil filling and discharge pipe interface to prevent the squeezed oil from flowing back, while the flap at the other end of the oil tank shell automatically releases the blockage at the other end of the oil filling and discharge pipe interface, facilitating the overheated oil in the transformer to enter the oil tank shell for cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the left side top view of the final assembly structure of the present invention;

[0029] Figure 2 It is a schematic front cross-sectional view of the present invention;

[0030] Figure 3 It is a schematic diagram of the main cross-section of the local structure of the push plate and capsule in the present invention;

[0031] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at center A;

[0032] Figure 5 It is a top view of the local structure of the capsule, connecting hose and oil squeezing mechanism in the present invention;

[0033] Figure 6 It is a top view of the connecting hose, the first movable rod and the movable ring in the present invention;

[0034] Figure 7 It is a schematic diagram of the front cross-section of the oil tank housing, push plate and oil replenishing mechanism in the present invention;

[0035] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point B in the middle;

[0036] Figure 9 It is a bottom-view cross-sectional diagram of the oil tank housing, push plate, and oil replenishing mechanism of the present invention;

[0037] Figure 10 It is a schematic diagram of a top view from the right side of the local structure of the push plate and oil replenishing mechanism in the present invention;

[0038] Figure 11 It is a right side cross-sectional schematic diagram of a partial structure of the oil replenishing mechanism in the present invention;

[0039] Figure 12 It is a schematic cross-sectional view of the oil replenishing mechanism and the opening and closing mechanism in the present invention;

[0040] Figure 13 For the present invention Figure 12 A magnified schematic diagram of the structure at point C in the middle;

[0041] Figure 14 It is a right side cross-sectional schematic diagram of the present invention;

[0042] Figure 15 It is a top view schematic diagram of a partial structure of the opening and closing mechanism in the present invention;

[0043] Figure 16 It is a bottom view schematic diagram of the partial structure of the opening and closing mechanism in the present invention.

[0044] In the figure: 1. Oil tank shell; 2. Oil filling and discharge pipe interface; 3. Dirt collecting box; 4. Push plate; 401. T-shaped connecting cavity; 5. Capsule; 501. Connecting hole; 502. Connecting hose; 503. Air pipe; 504. Respirator; 6. Oil squeezing mechanism; 601. Guide rail; 602. Linear motor; 603. First movable rod; 6031. Movable groove; 6032. Movable ring; 7. Oil replenishing mechanism; 701. Push block; 702. First hinged rod; 703. Moving block; 704. Second hinged rod; 705. Press rod; 7051. Torsion spring; 706. Mounting cylinder; 707. Piston rod; 708. First return spring; 709, normally open button; 7010, storage cylinder; 7011, infusion pump; 7012, oil pipeline; 8, opening and closing mechanism; 801, push rod; 802, positioning block; 803, second movable rod; 804, second return spring; 805, nylon rope; 8051, guide wheel; 806, lifting plate; 8061, guide rod; 8062, slide groove; 8063, third return spring; 807, pull rod; 8071, first rotating shaft; 8072, first V-shaped block; 8073, fixed block; 8074, second V-shaped block; 8075, second rotating shaft; 808, flip cover. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] See also Figures 1 to 16The present invention provides a technical solution: an oil storage cabinet for an oil-immersed transformer, comprising a tank shell 1, with oil filling and discharge pipe interfaces 2 fixedly installed at both ends of the tank shell 1. It should be added here that a filter is fixedly installed at the end of the oil filling and discharge pipe interface 2, which can filter impurities in the oil to prevent impurities from flowing into the transformer and affecting the use of the transformer, and the two oil filling and discharge pipe interfaces 2 are both connected to the interior of the transformer, and a push plate 4 is slidably installed inside the tank shell 1, and capsules 5 are fixedly installed on both sides of the push plate 4; through the setting of the push plate 4, the tank shell 1 can be divided into two oil storage areas, after the oil is squeezed into the transformer through the oil filling and discharge pipe interface 2 at one end of the tank shell 1, the overheated oil inside the transformer enters the interior through the oil filling and discharge pipe interface 2 at the other end of the tank shell 1 for cooling, thereby realizing rapid switching between oil storage and oil squeezing;

[0047] An oil squeezing mechanism 6 for delivering oil to the oil-immersed transformer is provided between the upper end of the push plate 4 and the two capsules 5;

[0048] The oil squeezing mechanism 6 includes: a guide rail 601, which is fixedly mounted on the top wall of the oil tank housing 1, and the middle part of the upper end of the push plate 4 is slidably mounted on the surface of the guide rail 601. A linear motor 602 is movably mounted on the surface of the guide rail 601. It should be noted that in order to prevent insulating oil from entering the linear motor 602, a waterproof housing can be installed on the outside of the linear motor 602 to prevent insulating oil from entering its interior, and one side of the linear motor 602 is fixedly connected to the surface of the push plate 4. A first movable rod 603 is fixedly mounted in the horizontal direction on the upper end of the guide rail 601, and the first movable rod 603 is arranged through the upper end of the push plate 4. A T-shaped connecting cavity 401 is provided on one side of the upper end of the push plate 4. The upper end of the capsule 5 is provided with a A connecting hole 501 is opened on the side, and the connecting hole 501 is connected to one side of the lower end of the T-shaped connecting cavity 401. The upper end of the T-shaped connecting cavity 401 is fixedly connected to a connecting hose 502, and the connecting hose 502 is wrapped around the surface of the first movable rod 603. It should be noted here that the material of the connecting hose 502 is the same as that of the capsule 5. An air pipe 503 is fixedly installed at one end of the connecting hose 502, and the air pipe 503 extends to the outside of the fuel tank shell 1. A respirator 504 is fixedly installed at one end of the air pipe 503; the air in the capsule 5 passes through the connecting hole 501 from the T-shaped connecting cavity 401, and then passes through the connecting hose 502 to be replenished and discharged from the respirator 504 at one end of the air pipe 503;

[0049] When the oil at one end of the oil tank shell 1 increases, the corresponding capsule 5 will discharge part of the internal air to the outside through the respirator 504 to ensure that the internal pressure of the oil tank shell 1 is normal. When the oil inside the oil tank shell 1 decreases, a certain amount of air enters the corresponding capsule 5 to ensure that the internal pressure of the oil tank shell 1 is normal. This is the existing technology and will not be elaborated on in detail. By installing a temperature sensor on the transformer and controlling the start of the linear motor 602 through an electrical connection controller, when it is detected that the oil temperature inside the transformer is too high, the linear motor 602 is started, and the linear motor 602 is used to control the start of the linear motor 602. It moves on the guide rail 601, thereby pushing the push plate 4 to move toward one end of the oil tank shell 1, so that the capsule 5 on the surface of one side of the push plate 4 squeezes the oil at one end of the inside of the oil tank shell 1. At this time, the capsule 5 on one side of the push plate 4 can quickly squeeze the oil into the oil-immersed transformer through the oil filling and discharge pipe interface 2, so as to speed up the cooling speed of the insulating oil inside the transformer and ensure the safe and stable operation of the transformer. After the oil at one end of the oil tank shell 1 enters the transformer, the overheated oil in the transformer enters the interior of the other end of the oil tank shell 1 through the oil filling and discharge pipe interface 2 at the other end of the oil tank shell 1 for cooling.

[0050] In this embodiment, Figures 1 to 16 As shown, a dirt collecting box 3 is symmetrically fixedly installed at the bottom of the fuel tank housing 1, and the two dirt collecting boxes 3 are located on both sides of the push plate 4. An oil replenishing mechanism 7 for replenishing oil inside the fuel tank housing 1 is provided between the surface of the upper end of the push plate 4 and the top of the fuel tank housing 1.

[0051] In this embodiment, Figures 1 to 16 As shown, movable grooves 6031 are formed on the upper and lower surfaces of the first movable rod 603 , and a plurality of movable rings 6032 are equidistantly slidably installed inside the movable grooves 6031 . The outer walls of the movable rings 6032 are fixedly connected to the surface of the connecting hose 502 .

[0052] Since the connecting hose 502 is wrapped around the surface of the first movable rod 603, when the linear motor 602 drives the push plate 4 to move, the connecting hose 502 is stretched or contracted accordingly to ensure the normal entry and exit of the air inside the capsule 5. Considering that the connecting hose 502 may cause wear when moving on the surface of the first movable rod 603, a number of movable rings 6032 are slidably installed on the surface of the first movable rod 603, so that the surface of the connecting hose 502 is fixedly connected to the movable rings 6032, so that the movable rings 6032 drive the connecting hose 502 to move and retract, thereby avoiding direct contact between the connecting hose 502 and the first movable rod 603, thereby preventing the problem of surface wear of the connecting hose 502.

[0053] In this embodiment, Figures 1 to 16As shown, the oil replenishing mechanism 7 includes a push block 701, two push blocks 701 are provided, and the two push blocks 701 are symmetrically fixedly mounted on both sides of the upper end of the push plate 4, one end of the push block 701 is hingedly mounted with a first hinged rod 702, and one end of the first hinged rod 702 is hingedly mounted with a moving block 703, the top of the moving block 703 is movably mounted on the top wall of the oil tank housing 1, the top of the moving block 703 is hingedly mounted with a second hinged rod 704, and the top of one end of the second hinged rod 704 is movably mounted on the top wall of the oil tank housing 1, a pressure rod 705 is rotatably mounted inside the lower end of the moving block 703, and one end of the pressure rod 705 is placed on the surface of the adjacent capsule 5;

[0054] The top of the fuel tank housing 1 is symmetrically fixed with a mounting cylinder 706, and a piston rod 707 is movably mounted vertically inside the mounting cylinder 706, and both ends of the piston rod 707 extend to the outside of the mounting cylinder 706, and the bottom of the piston rod 707 is placed on the surface of the adjacent pressure rod 705. The surface of the upper end of the piston rod 707 is covered with a first return spring 708, and the two ends of the first return spring 708 are respectively fixed between the surface of the piston rod 707 and the top wall of the mounting cylinder 706. It should be noted here that a piston ring is fixed to the middle of the piston rod 707, and the outer ring of the piston ring is tightly fitted with the inner wall of the mounting cylinder 706. The lower end of the first return spring 708 is fixedly connected to the surface of the piston ring. A storage cylinder 7010 is fixedly installed on the top of the oil tank housing 1, and normally open buttons 709 are fixedly installed at both ends of the storage cylinder 7010. The upper end of the piston rod 707 is located directly below the normally open contact on the adjacent normally open button 709. An infusion pump 7011 is fixedly installed at both ends of the storage cylinder 7010, and the liquid inlet end of the infusion pump 7011 is connected to the interior of the storage cylinder 7010. The infusion pump 7011 is electrically connected to the normally open button 709. An oil delivery pipe 7012 is fixedly installed at the liquid outlet end of the infusion pump 7011, and one end of the oil delivery pipe 7012 extends to the interior of the oil tank housing 1. An opening and closing mechanism 8 is also provided between the upper end of the push plate 4 and the adjacent oil filling and discharge pipe interface 2 to prevent oil backflow.

[0055] Under factors such as long-term oil seepage or large-scale oil leakage in the transformer, the amount of oil in the oil tank shell 1 will gradually decrease. When the amount of oil in the oil tank shell 1 decreases significantly, the oil level stored in one end of the oil tank shell 1 will decrease. At this time, air enters the capsule 5, causing the capsule 5 to expand. At this time, the capsule 5 will squeeze and push the pressure rod 705 on the adjacent side, causing the pressure rod 705 to deflect. At this time, one end of the pressure rod 705 deflects upward and squeezes and pushes the corresponding piston rod 707 to move upward, causing the top of the piston rod 707 to squeeze and push the normally open contact of the normally open button 709. At the same time, the circuit of the infusion pump 7011 is connected, and the infusion pump 7011 pumps the oil in the storage cylinder 7010 from the oil pipe 7012 The oil is replenished to the interior of one end of the oil tank shell 1 for storing oil. When the oil is replenished to a certain amount, the capsule 5 exhausts air to the outside to ensure the balance of the internal pressure of the oil tank shell 1 through the rise of the liquid level. The volume of the capsule 5 shrinks. When the capsule 5 shrinks to a certain volume, the squeezing of the pressure rod 705 is released. At this time, the pressure rod 705 is deflected and reset under the action of the torsion spring 7051, so that one end of the pressure rod 705 releases the squeezing of the piston rod 707. At this time, the internal circuit of the normally open button 709 is disconnected again, and the infusion pump 7011 stops delivering oil, thereby realizing automatic replenishment of the oil inside the oil tank shell 1, increasing the functionality of the oil storage cabinet, thereby extending the inspection cycle of the oil tank and reducing the workload of the operators.

[0056] What needs to be explained in detail here is that when the push plate 4 drives the capsule 5 on one side to move closer to the corresponding piston rod 707, the push block 701 on the upper end of the push plate 4 will push the hinged first hinge rod 702 to deflect, so that the first hinge rod 702 drives the hinged moving block 703 to move in the direction away from the piston rod 707. At this time, the pressure rod 705 rotatably installed on the moving block 703 is not below the piston rod 707, and the pressure rod 705 will not squeeze the piston rod 707 when it deflects. At the same time, the moving block 703 pulls the hinged second hinge rod 704 to deflect, so that one end of the second hinge rod 704 is close to the first hinge rod 702, and the inside of the other end of the tank housing 1 is closed due to the push rod 702. The plate 4 drives the capsule 5 on the other side to move away from the piston rod 707, so that the push block 701 pulls the first hinged rod 702 to deflect, and the first hinged rod 702 drives the moving block 703 to move, so that the pressure rod 705 at the lower end of the moving block 703 moves to the bottom of the corresponding piston rod 707. At the same time, the moving block 703 pushes the hinged second hinged rod 704 to move away from the first hinged rod 702, so that after the oil in the oil storage area is reduced, the expansion of the capsule 5 can squeeze and push the pressure rod 705 to deflect and perform the oil replenishment operation. In the oil squeezing area, the pressure rod 705 can avoid contact with the piston rod 707 to prevent automatic oil replenishment in the oil squeezing area.

[0057] In this embodiment, Figures 1 to 16As shown, the top of the moving block 703 and the top of one end of the second hinged rod 704 are both fixedly installed with a rotating shaft, and the top of the rotating shaft is fixedly connected to a slider. The top wall of the fuel tank housing 1 is provided with a guide groove that cooperates with the adjacent slider. The moving block 703 and the second hinged rod 704 are both slidably installed in the guide groove of the top wall of the fuel tank housing 1 through the slider, and one end of the first hinged rod 702 and the other end of the second hinged rod 704 are both rotatably installed on the rotating shaft at the top of the moving block 703.

[0058] When the push plate 4 moves toward the side of the oil tank casing 1, the push block 701 fixed on the upper end of the push plate 4 drives the hinged first hinge rod 702 to move, and is slidably installed on the top wall of the oil tank casing 1 through the moving block 703 and one end of the second hinge rod 704. When the first hinge rod 702 moves, it can drive the moving block 703 to move in its corresponding guide groove. Through the movement of the moving block 703, the moving block 703 drives one end of the second hinge rod 704 to move in its corresponding guide groove, thereby further enabling the pressure rod 705 at the lower end of the moving block 703 to move stably.

[0059] In this embodiment, Figures 1 to 16 As shown, a cavity is opened inside the lower end of the moving block 703, a rotating rod is fixedly installed on one side of the pressure rod 705, and one end of the rotating rod is rotatably installed in the cavity at the lower end of the moving block 703, and a torsion spring 7051 is installed between the surface of one end of the rotating rod and the cavity at the lower end of the moving block 703.

[0060] Through the setting of the torsion spring 7051, when one end of the pressure rod 705 is not squeezed by the capsule 5, the torsion spring 7051 drives the pressure rod 705 to return to the initial state, so that when the volume of the capsule 5 increases, it can be squeezed at the end of the pressure rod 705, causing the pressure rod 705 to deflect and squeeze to push the piston rod 707 upward.

[0061] In this embodiment, Figures 1 to 16As shown, the opening and closing mechanism 8 includes a push rod 801, which is fixedly mounted on one side of the upper end of the push plate 4, a positioning block 802 is fixedly mounted on the top wall of the fuel tank housing 1, and a second movable rod 803 is provided in the middle of the positioning block 802 in the horizontal direction, one end of the second movable rod 803 is mounted on the end of the adjacent push rod 801, one end of the second movable rod 803 is sheathed with a second return spring 804, and the two ends of the second return spring 804 are respectively fixedly mounted on the surface of one end of the second movable rod 803 and the surface of one side of the positioning block 802, and the other end of the second movable rod 803 is fixedly mounted with a nylon rope 80 5. A guide wheel 8051 is provided on the surface of the nylon rope 805. The top of the guide wheel 8051 is fixedly mounted on the top wall of the fuel tank housing 1. One end of the nylon rope 805 is fixedly connected to a lifting plate 806. A guide rod 8061 is movably provided through one side of the lifting plate 806. A chute 8062 is provided on the side wall of the fuel tank housing 1. Both ends of the guide rod 8061 are fixedly mounted inside the chute 8062. A third return spring 8063 is sleeved on the upper end of the guide rod 8061. Both ends of the third return spring 8063 are respectively fixedly mounted between the surface of the lifting plate 806 and the top wall of the chute 8062.

[0062] Both ends of the lifting plate 806 are hingedly installed with a pull rod 807, and one end of the pull rod 807 is rotatably installed with a first rotating shaft 8071, one end of the first rotating shaft 8071 is hingedly installed with a first V-shaped block 8072, and one end of the first V-shaped block 8072 is rotatably installed with a fixed block 8073, one end of the fixed block 8073 is fixedly installed on the inner wall of the oil tank shell 1, the other end of the first rotating shaft 8071 is hingedly installed with a second V-shaped block 8074, one end of the second V-shaped block 8074 is rotatably installed with a flip cover 808, and both ends of the flip cover 808 are rotatably installed with a second rotating shaft 8075, and one end of the second rotating shaft 8075 is rotatably installed on the adjacent fixed block 8073.

[0063] When the push plate 4 drives the capsule 5 to squeeze the oil at one end of the oil tank shell 1 into the transformer, when the push plate 4 is about to move to the limit position, the push rod 801 at the upper end of the push plate 4 will squeeze and push the corresponding second movable rod 803 end, so that the second movable rod 803 moves in the direction away from the capsule 5. At this time, the nylon rope 805 at the end of the second movable rod 803 is no longer in a taut state. At this time, under the elastic reset of the third reset spring 8063, the lifting plate 806 is pushed down, so that the pull rods 807 at both ends of the lifting plate 806 push the first V-shaped block 8072 and the second V-shaped block 8074 hinged thereto to deflect. The first V-shaped block 8072 deflects at the hinge with the fixed block 8073, and the second V-shaped block 8074 deflects at the hinge with the flip cover 808. At the same time, the flip cover 808 flips downward with the second rotating shaft 8075 as the axis. When the lifting plate 806 moves down to its position, the flip cover 808 completes a 180-degree flip, so that the flip cover 808 blocks the end of the oil injection and discharge pipe interface 2 to prevent the oil squeezed into the transformer from flowing back. At the same time, when the capsule 5 moves, the push rod 801 at the other end of the oil tank shell 1 releases the squeeze on the end of the second movable rod 803. Under the elastic reset of the second return spring 804, the second movable rod 803 pulls the nylon rope 805 in a taut state, thereby driving the lifting plate 806 to move upward, so that the third return spring 8063 is squeezed and contracted. At the same time, the pull rods 807 at both ends of the lifting plate 806 pull the corresponding first V-block 8072 and second V-block 8074 to deflect and reset, so that the flip cover 808 flips upward 180 degrees with the second rotating shaft 8075 as the axis. At this time, the flip cover 808 releases the blockage at the other end of the oil injection and discharge pipe interface 2, so that the overheated oil in the transformer can enter the oil tank shell 1 for cooling.

[0064] In this embodiment, Figures 1 to 16 As shown, a waist-shaped groove is provided inside one end of the pull rod 807 , and the first rotating shaft 8071 is rotatably installed in the waist-shaped groove at one end of the pull rod 807 .

[0065] By setting the waist-shaped groove, when the pull rod 807 pushes or pulls the hinged first V-shaped block 8072 and the second V-shaped block 8074 to deflect, the deflection of the first V-shaped block 8072 and the second V-shaped block 8074 is not interfered.

[0066] In this embodiment, Figures 1 to 16 As shown, a method for using an oil conservator for an oil-immersed transformer includes the following steps:

[0067] S1. When the oil tank shell 1 is used in conjunction with the oil-immersed transformer, when the oil temperature inside the transformer is too high, the linear motor 602 is started, and the linear motor 602 moves on the guide rail 601, thereby pushing the push plate 4 to move toward one end of the oil tank shell 1, so that the capsule 5 on the surface of one side of the push plate 4 squeezes the oil at one end of the inside of the oil tank shell 1. At this time, the capsule 5 on one side of the push plate 4 can quickly squeeze the oil into the oil-immersed transformer through the oil filling and discharge pipe interface 2, and after the oil at one end of the oil tank shell 1 enters the transformer, the overheated oil in the transformer enters the interior of the other end of the oil tank shell 1 through the oil filling and discharge pipe interface 2 at the other end of the oil tank shell 1 for cooling.

[0068] S2. When the push plate 4 drives the capsule 5 to squeeze the oil at one end of the oil tank shell 1 into the transformer, when the push plate 4 is about to move to the limit position, the push rod 801 at the upper end of the push plate 4 will squeeze and push the corresponding end of the second movable rod 803, so that the second movable rod 803 moves away from the capsule 5. At this time, the nylon rope 805 at the end of the second movable rod 803 is no longer in a taut state. At this time, the elastic reset of the third reset spring 8063 pushes the lifting plate 806 down, so that the tension at both ends of the lifting plate 806 is reduced. The rod 807 pushes the first V-shaped block 8072 and the second V-shaped block 8074 hinged thereto to deflect. The first V-shaped block 8072 deflects at the hinged connection with the fixed block 8073. At the same time, the second V-shaped block 8074 deflects at the hinged connection with the flip cover 808. At the same time, the flip cover 808 flips downward with the second rotating shaft 8075 as the axis. When the lifting plate 806 moves down to its correct position, the flip cover 808 completes a 180-degree flip, so that the flip cover 808 blocks the end of the oil filling and discharge pipe interface 2 to prevent the oil squeezed into the transformer from flowing back.

[0069] S3. At the same time, when the capsule 5 moves, the push rod 801 at the other end of the oil tank housing 1 releases the squeeze on the end of the second movable rod 803. Under the elastic reset of the second return spring 804, the second movable rod 803 pulls the nylon rope 805 to be in a taut state, thereby driving the lifting plate 806 to move upward, causing the third return spring 8063 to be squeezed and contracted. At the same time, the pull rods 807 at both ends of the lifting plate 806 pull the corresponding first V-block 8072 and second V-block 8074 to deflect and reset, causing the flip cover 808 to flip upward 180 degrees with the second rotating shaft 8075 as the axis. At this time, the flip cover 808 releases the blockage at the other end of the oil filling and discharge pipe interface 2, so that the overheated oil in the transformer can enter the oil tank housing 1 for cooling.

[0070] S4. When the amount of oil in the oil tank housing 1 decreases significantly, the oil level stored at one end of the oil tank housing 1 decreases. At this time, air enters the capsule 5, causing the capsule 5 to expand. At this time, the capsule 5 squeezes and pushes the pressure rod 705 on the adjacent side, causing the pressure rod 705 to deflect. At this time, one end of the pressure rod 705 deflects upward and squeezes and pushes the corresponding piston rod 707 to move upward, causing the top of the piston rod 707 to squeeze and push the normally open contact of the normally open button 709. At the same time, the circuit of the infusion pump 7011 is connected, and the infusion pump 7011 pumps the oil in the storage cylinder 7010 from the oil delivery pipe 70 12 is replenished to the interior of one end of the oil tank shell 1 where the oil is stored, and the oil inside the oil tank shell 1 is automatically replenished. When the oil is replenished to a certain amount, the capsule 5 exhausts air to the outside to ensure the balance of the internal pressure of the oil tank shell 1 through the rise of the liquid level, and the volume of the capsule 5 shrinks. When the capsule 5 shrinks to a certain volume, the squeezing of the pressure rod 705 is released. At this time, the pressure rod 705 is deflected and reset under the action of the torsion spring 7051, so that one end of the pressure rod 705 releases the squeezing of the piston rod 707. At this time, the internal circuit of the normally open button 709 is disconnected again, and the infusion pump 7011 stops delivering oil.

[0071] S5. When the push plate 4 drives the capsule 5 on one side to move away from the piston rod 707, so that the capsule 5 in the oil replenishing area can expand to replenish oil, the capsule 5 on the other side of the push plate 4 will move closer to the corresponding piston rod 707. The push block 701 on the upper end of the push plate 4 will push the hinged first hinge rod 702 to deflect, so that the first hinge rod 702 drives the hinged moving block 703 to move away from the piston rod 707. At this time, the pressure rod 705 rotatably installed at the lower end of the moving block 703 is not below the piston rod 707. When the pressure rod 705 deflects, it will not squeeze the piston rod 707, so that the pressure rod 705 in the oil squeezing area can avoid contact with the piston rod 707, preventing the oil squeezing area from automatically replenishing oil.

[0072] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil conservator for an oil-immersed transformer, comprising an oil tank shell (1), oil filling and discharge pipe interfaces (2) fixedly mounted on both ends of the oil tank shell (1), a push plate (4) slidably mounted inside the oil tank shell (1), and capsules (5) fixedly mounted on both sides of the push plate (4); It is characterized by: An oil squeezing mechanism (6) for conveying oil in the oil-immersed transformer is provided between the upper end of the push plate (4) and the two capsules (5); The oil squeezing mechanism (6) comprises: a guide rail (601), the guide rail (601) is fixedly mounted on the top wall of the oil tank housing (1), the middle portion of the upper end of the push plate (4) is slidably mounted on the surface of the guide rail (601), a linear motor (602) is movably mounted on the surface of the guide rail (601), and one side of the linear motor (602) is fixedly connected to the surface of the push plate (4), a first movable rod (603) is fixedly mounted in the horizontal direction on the upper end of the guide rail (601), and the first movable rod (603) is arranged through the upper end of the push plate (4), and one side of the upper end of the push plate (4) A T-shaped connecting cavity (401) is provided, a connecting hole (501) is provided on one side of the upper end of the capsule (5), and the connecting hole (501) is communicated with one side of the lower end of the T-shaped connecting cavity (401), the upper end of the T-shaped connecting cavity (401) is fixedly connected to a connecting hose (502), and the connecting hose (502) is wound on the surface of the first movable rod (603), one end of the connecting hose (502) is fixedly installed with an air pipe (503), and the air pipe (503) extends to the outside of the fuel tank shell (1), and one end of the air pipe (503) is fixedly installed with a respirator (504).

2. The oil conservator for an oil-immersed transformer according to claim 1, characterized in that: A dirt collecting box (3) is symmetrically fixedly mounted on the bottom of the oil tank housing (1), and the two dirt collecting boxes (3) are located on both sides of the push plate (4). An oil replenishing mechanism (7) for replenishing oil inside the oil tank housing (1) is provided between the upper surface of the push plate (4) and the top of the oil tank housing (1).

3. The oil conservator for an oil-immersed transformer according to claim 1, characterized in that: The surfaces of the upper and lower ends of the first movable rod (603) are both provided with movable grooves (6031), and a plurality of movable rings (6032) are equidistantly slidably installed inside the movable grooves (6031), and the outer walls of the movable rings (6032) are fixedly connected to the surface of the connecting hose (502).

4. The oil conservator for an oil-immersed transformer according to claim 2, characterized in that: The oil replenishing mechanism (7) includes a push block (701), two push blocks (701) are provided, and the two push blocks (701) are symmetrically fixedly installed on both sides of the upper end of the push plate (4); one end of the push block (701) is hingedly installed with a first hinge rod (702), and one end of the first hinge rod (702) is hingedly installed with a moving block (703); the top of the moving block (703) is movably installed on the top wall of the oil tank shell (1); the top of the moving block (703) is hingedly installed with a second hinge rod (704), and the top of one end of the second hinge rod (704) is movably installed on the top wall of the oil tank shell (1); a pressure rod (705) is rotatably installed inside the lower end of the moving block (703), and one end of the pressure rod (705) is placed on the surface of the adjacent capsule (5); The top of the oil tank shell (1) is symmetrically fixedly mounted with a mounting cylinder (706), and a piston rod (707) is movably mounted vertically inside the mounting cylinder (706), and both ends of the piston rod (707) extend to the outside of the mounting cylinder (706), the bottom of the piston rod (707) is placed on the surface of the adjacent pressure rod (705), the surface of the upper end of the piston rod (707) is covered with a first return spring (708), and the two ends of the first return spring (708) are respectively fixedly mounted between the surface of the piston rod (707) and the top wall of the mounting cylinder (706), the top of the oil tank shell (1) is fixedly mounted with a storage cylinder (7010), and both ends of the storage cylinder (7010) are fixedly mounted. There is a normally open button (709), the upper end of the piston rod (707) is located directly below the normally open contact on the adjacent normally open button (709), both ends of the storage cylinder (7010) are fixedly installed with an infusion pump (7011), and the liquid inlet end of the infusion pump (7011) is connected to the inside of the storage cylinder (7010), the infusion pump (7011) and the normally open button (709) are electrically connected, the liquid outlet end of the infusion pump (7011) is fixedly installed with an oil delivery pipe (7012), and one end of the oil delivery pipe (7012) extends to the inside of the oil tank shell (1), and an opening and closing mechanism (8) for preventing oil backflow is also provided between the upper end of the push plate (4) and the adjacent oil injection and discharge pipe interface (2).

5. The oil conservator for an oil-immersed transformer according to claim 4, characterized in that: The top of the moving block (703) and the top of one end of the second hinged rod (704) are both fixedly mounted with a rotating shaft, and the top of the rotating shaft is fixedly connected to a slider. The top wall of the oil tank housing (1) is provided with a guide groove that matches the adjacent slider. The moving block (703) and the second hinged rod (704) are both slidably mounted in the guide groove of the top wall of the oil tank housing (1) through the slider. One end of the first hinged rod (702) and the other end of the second hinged rod (704) are both rotatably mounted on the rotating shaft at the top of the moving block (703).

6. The oil conservator for an oil-immersed transformer according to claim 4, characterized in that: A cavity is provided inside the lower end of the moving block (703), a rotating rod is fixedly installed on one side of the pressure rod (705), and one end of the rotating rod is rotatably installed in the cavity at the lower end of the moving block (703), and a torsion spring (7051) is installed between the surface of one end of the rotating rod and the cavity at the lower end of the moving block (703).

7. The oil conservator for an oil-immersed transformer according to claim 4, characterized in that: The opening and closing mechanism (8) includes a push rod (801), which is fixedly mounted on one side of the upper end of the push plate (4), and a positioning block (802) is fixedly mounted on the top wall of the oil tank housing (1), and a second movable rod (803) is provided in the middle of the positioning block (802) so as to be movable in the horizontal direction. One end of the second movable rod (803) is mounted on the end adjacent to the push rod (801), and one end of the second movable rod (803) is fitted with a second return spring (804), and the two ends of the second return spring (804) are respectively fixedly mounted on the surface of one end of the second movable rod (803) and the surface of one side of the positioning block (802), and the other end of the second movable rod (803) is fixedly mounted with a nylon rope (80 5), and a guide wheel (8051) is provided on the surface of the nylon rope (805), the top of the guide wheel (8051) is fixedly mounted on the top wall of the oil tank shell (1), one end of the nylon rope (805) is fixedly connected to a lifting plate (806), and a guide rod (8061) is movably provided on one side of the lifting plate (806), a slide groove (8062) is provided on the side wall of the oil tank shell (1), and both ends of the guide rod (8061) are fixedly mounted inside the slide groove (8062), and a third return spring (8063) is sleeved on the upper end of the guide rod (8061), and both ends of the third return spring (8063) are respectively fixedly mounted between the surface of the lifting plate (806) and the top wall of the slide groove (8062); Both ends of the lifting plate (806) are hingedly mounted with a pull rod (807), and one end of the pull rod (807) is rotatably mounted with a first rotating shaft (8071), one end of the first rotating shaft (8071) is hingedly mounted with a first V-shaped block (8072), and one end of the first V-shaped block (8072) is rotatably mounted with a fixed block (8073), one end of the fixed block (8073) is fixedly mounted on the inner wall of the oil tank shell (1), the other end of the first rotating shaft (8071) is hingedly mounted with a second V-shaped block (8074), one end of the second V-shaped block (8074) is rotatably mounted with a flip cover (808), and both ends of the flip cover (808) are rotatably mounted with a second rotating shaft (8075), and one end of the second rotating shaft (8075) is rotatably mounted on the adjacent fixed block (8073).

8. The oil conservator for an oil-immersed transformer according to claim 7, characterized in that: A waist-shaped groove is provided inside one end of the pull rod (807), and the first rotating shaft (8071) is rotatably installed in the waist-shaped groove at one end of the pull rod (807).

9. A method for using an oil conservator for an oil-immersed transformer, characterized in that: Using the oil conservator for an oil-immersed transformer according to any one of claims 1 to 8 comprises the following steps: S1. When the oil tank housing (1) is used in conjunction with the oil-immersed transformer, when the oil temperature inside the transformer is too high, the linear motor (602) is started, and the linear motor (602) moves on the guide rail (601), thereby pushing the push plate (4) to move toward one end of the oil tank housing (1), so that the capsule (5) on the surface of one side of the push plate (4) squeezes the oil at one end of the interior of the oil tank housing (1). At this time, the capsule (5) on one side of the push plate (4) can quickly squeeze the oil into the oil-immersed transformer through the oil injection and discharge pipe interface (2), and after the oil at one end of the oil tank housing (1) enters the transformer, the overheated oil in the transformer enters the interior of the other end of the oil tank housing (1) through the oil injection and discharge pipe interface (2) at the other end of the oil tank housing (1) to be cooled; S2. When the push plate (4) drives the capsule (5) to squeeze the oil at one end of the oil tank shell (1) into the transformer, when the push plate (4) is about to move to the limit position, the push rod (801) at the upper end of the push plate (4) will squeeze and push the corresponding second movable rod (803) end, so that the second movable rod (803) moves in a direction away from the capsule (5). At this time, the nylon rope (805) at the end of the second movable rod (803) is no longer in a taut state. At this time, under the elastic reset of the third reset spring (8063), the lifting plate (806) is pushed down, so that the two ends of the lifting plate (806) are The pull rod (807) pushes the first V-shaped block (8072) and the second V-shaped block (8074) hinged thereto to deflect. The first V-shaped block (8072) deflects at the hinged joint with the fixed block (8073). At the same time, the second V-shaped block (8074) deflects at the hinged joint with the flip cover (808). At the same time, the flip cover (808) flips downward with the second rotating shaft (8075) as the axis. When the lifting plate (806) moves down to its proper position, the flip cover (808) completes a 180-degree flip, so that the flip cover (808) blocks the end of the oil injection and discharge pipe interface (2) to prevent the oil squeezed into the transformer from flowing back. S3. At the same time, when the capsule (5) moves, the push rod (801) at the other end of the oil tank housing (1) releases the squeeze on the end of the second movable rod (803). Under the elastic reset of the second reset spring (804), the second movable rod (803) pulls the nylon rope (805) to be in a taut state, thereby driving the lifting plate (806) to move upward, causing the third reset spring (8063) to be squeezed and contracted. At the same time, the pull rods (807) at both ends of the lifting plate (806) pull the corresponding first V-shaped block (8072) and second V-shaped block (8074) to deflect and reset, causing the flip cover (808) to flip upward 180 degrees with the second rotating shaft (8075) as the axis. At this time, the flip cover (808) releases the blockage on the other end of the oil injection and discharge pipe interface (2), facilitating the overheated oil in the transformer to enter the oil tank housing (1) for cooling; S4. When the amount of oil in the oil tank housing (1) decreases significantly, the oil level stored in one end of the oil tank housing (1) decreases. At this time, air enters the capsule (5), causing the capsule (5) to expand. At this time, the capsule (5) squeezes and pushes the pressure rod (705) on the adjacent side, causing the pressure rod (705) to deflect. At this time, one end of the pressure rod (705) deflects upward and squeezes and pushes the corresponding piston rod (707) to move upward, causing the top of the piston rod (707) to squeeze and push the normally open contact of the normally open button (709). At the same time, the circuit of the infusion pump (7011) is connected, and the infusion pump (7011) pumps the oil in the storage cylinder (7010) from the oil delivery pipe (7011). 012) is replenished to the interior of one end of the oil tank housing (1) storing the oil, and the oil in the oil tank housing (1) is automatically replenished. When the oil is replenished to a certain amount, the capsule (5) exhausts air to the outside to ensure the balance of the internal pressure of the oil tank housing (1) through the rise of the liquid level. The volume of the capsule (5) shrinks. When the capsule (5) shrinks to a certain volume, the pressure on the pressure rod (705) is released. At this time, the pressure rod (705) is deflected and reset under the action of the torsion spring (7051), so that one end of the pressure rod (705) releases the pressure on the piston rod (707). At this time, the internal circuit of the normally open button (709) is disconnected again, and the infusion pump (7011) stops delivering oil; S5. When the push plate (4) drives the capsule (5) on one side to move in a direction away from the piston rod (707), so that the capsule (5) in the oil replenishing area can expand to perform the oil replenishing operation, the capsule (5) on the other side of the push plate (4) will move closer to the corresponding piston rod (707), and the push block (701) on one side of the upper end of the push plate (4) will push the hinged first hinge rod (702) to deflect, so that the first hinge rod (702) drives the hinged moving block (703) to move in a direction away from the piston rod (707). At this time, the pressure rod (705) rotatably installed at the lower end of the moving block (703) is not below the piston rod (707). When the pressure rod (705) deflects, it will not squeeze the piston rod (707), so that the pressure rod (705) in the oil squeezing area can avoid contacting the piston rod (707) to prevent the oil squeezing area from automatically replenishing oil.

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