An energy-saving photovoltaic step-up transformer box device and its intelligent terminal

Abstract

The present invention belongs to the technical field of transformer equipment, specifically an energy-saving photovoltaic step-up box transformer device and its intelligent terminal, including a box-type main body, an oil-immersed transformer, and an oil pillow main body installed on the oil-immersed transformer; it also includes an oil control mechanism installed inside the oil pillow main body. By setting the oil control mechanism, the present invention controls the flow of the transformer oil, causing the hot and more impurity-containing transformer oil in the oil-immersed transformer to enter from the bottom of the oil storage cavity, while the transformer oil that has been statically placed in the oil storage cavity for a long time is lifted, thereby shortening the sedimentation path of impurities in the newly entered transformer oil. When the transformer oil flows back, it starts to flow back from the top of the oil storage cavity. On the one hand, it reduces the probability of the settled oil scale flowing back into the oil-immersed transformer, and on the other hand, the opening of the return pipe is far from the oil scale, which can also effectively reduce the probability of the oil scale blocking the return pipe.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformer equipment, and specifically relates to an energy-saving photovoltaic step-up box transformer device and its intelligent terminal. Background Art

[0002] A special transformer designed for photovoltaic step-up, the oil-immersed transformer is one of the commonly used options for box transformer devices. When configured, it is usually equipped with an oil conservator.

[0003] As one of the important components of the energy-saving photovoltaic step-up box transformer device, the main function of the oil conservator is to regulate the change in the volume of transformer oil. At the same time, as a barrier for isolating the transformer from the outside world, it effectively prevents the direct contact between the transformer oil and air, thereby reducing the oxidation and moisture absorption of the oil and ensuring the insulation performance of the transformer oil. Although the presence of the oil conservator can effectively reduce the rate of oil deterioration, during the long-term use of the transformer oil, impurities and oil scale will still be generated in the transformer oil. The oil scale and impurities accumulate at the bottom of the oil conservator, which will hinder the flow of the transformer oil, not only being unfavorable for the replenishment of the transformer oil, but also affecting the flow of the transformer oil, and further reducing the heat dissipation effect of the transformer oil.

[0004] In related technologies, in order to improve this problem, an integrated photovoltaic step-up transformer is disclosed, with the application number CN201910677889X. In this solution, a breathing structure is provided at the upper end of the oil replenishment and reflux structure. The oil liquid with oil scale will flow downward along the slope of the filter plate. At this time, the filter holes will filter the oil liquid, and the baffle will guide the oil liquid towards the filter holes. The curved plate can collect the oil scale to the inside of the reflux cavity. When the oil liquid impacts the inside of the reflux cavity, it will drive the oil scale to move upward along the filter plate. At this time, the baffle will block the oil scale, and the filter holes will filter again, thereby collecting the oil scale in the transformer and preventing the blockage of the oil transmission between the oil conservator and the transformer. However, it is found in the actual experiment process that although the air entering the oil conservator is filtered in this solution, since there is no barrier between the transformer oil and air in the oil conservator, the transformer oil is affected by air, and the oxidation and moisture absorption rates are relatively fast, thereby shortening the service life of the transformer oil.

[0005] In view of this, the present invention proposes an energy-saving photovoltaic step-up box transformer device and its intelligent terminal to solve the above technical problems. Summary of the Invention

[0006] To make up for the deficiencies of the prior art and solve the above technical problems, the present invention proposes an energy-saving photovoltaic step-up box transformer device and its intelligent terminal.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: An energy-saving photovoltaic step-up box transformer device described in the present invention includes a box body, an oil-immersed transformer, and an oil conservator body installed on the oil-immersed transformer;

[0008] It further includes an oil control mechanism installed inside the oil conservator body. The oil control mechanism is used to control the flow path of transformer oil in the transformer and the oil conservator body. The oil control mechanism includes:

[0009] A corrugated core, which is installed inside the oil conservator body. The inner cavity of the oil conservator body is divided into a non-communicating oil storage cavity and a ventilation cavity by the corrugated core;

[0010] An oil outlet pipe and a return pipe, both of which are fixedly installed on the oil conservator. The oil outlet pipe and the return pipe both extend into the oil storage cavity, and the oil outlet pipe opens at the bottom end of the oil storage cavity, and the return pipe opens at the top end of the oil storage cavity;

[0011] It further includes a one-way control mechanism, which is used to control the flow path of transformer oil in the oil outlet pipe and the return pipe.

[0012] Preferably, the return pipe is a telescopic pipe, and the top end of the return pipe is fixedly connected to the top end of the inner cavity of the corrugated core.

[0013] Preferably, a filter box is fixedly installed at the top end of the inner cavity of the corrugated core. The return pipe extends into the inner cavity of the filter box, and the filter box is used to filter the transformer oil.

[0014] Preferably, the one-way control mechanism includes:

[0015] A control pipe, which is fixedly installed between the oil-immersed transformer and the oil conservator body. The oil outlet pipe is fixedly installed at the top end of the control pipe, and the control pipe is conductively connected to the oil-immersed transformer and the oil outlet pipe;

[0016] A sliding plug, the inner cavity of the control pipe is stepped, and the inner cavity of the control pipe is larger at the end close to the oil conservator body than at the end close to the oil-immersed transformer. The sliding plug is slidably installed in the inner cavity of the control pipe;

[0017] A return hole, a lifting groove is opened inside the sliding plug. The bottom end of the return pipe extends into the lifting groove and is slidably and sealingly connected to the lifting groove. A return hole is opened on the sliding plug, and the middle part of the return hole extends to the side wall of the lifting groove.

[0018] Preferably, a control spring is fixedly installed in the control pipe. The control spring is fixedly connected to the sliding plug, and the control spring is used to control the initial position of the sliding plug.

[0019] Preferably, a partition hopper is fixedly installed inside the conservator body. The partition hopper is fixedly installed on the control pipe, and the opening of the oil outlet pipe is located above the partition hopper.

[0020] Preferably, the height of the partition hopper gradually decreases from the center of the corrugated core to the edge. The side wall of the oil outlet pipe is provided with an opening, and the opening direction of the oil outlet pipe is the same as the inclination direction of the partition hopper.

[0021] Preferably, a sewage discharge pipe is installed at the bottom end of the conservator body. A fuel injection pipe is fixedly installed on the control pipe, and the fuel injection pipe extends to the bottom of the lifting groove.

[0022] Preferably, a variable volume pipe is inlaid and installed at the top end of the corrugated core. A diaphragm is fixedly installed inside the variable volume pipe. A plunger pump is hermetically installed at the top end of the variable volume pipe, and the bottom end of the variable volume pipe is conductively connected to the filter box.

[0023] An energy-saving photovoltaic step-up box transformer intelligent terminal, which includes an energy-saving photovoltaic step-up box transformer device.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. For the energy-saving photovoltaic step-up box transformer device and its intelligent terminal of the present invention, by setting an oil control mechanism, through controlling the flow of the transformer oil, the hot and impurity-rich transformer oil in the oil-immersed transformer enters from the bottom of the oil storage chamber, and the transformer oil that has been standing still in the oil storage chamber is lifted, thereby shortening the sedimentation path of impurities in the newly entered transformer oil in the oil storage chamber. When the transformer oil flows back, it starts to flow back from the top end of the oil storage chamber. On the one hand, it reduces the probability of the settled oil scale flowing back into the oil-immersed transformer, and on the other hand, the opening of the return pipe is far from the oil scale, which can effectively reduce the probability of the oil scale blocking the return pipe.

[0026] 2. For the energy-saving photovoltaic step-up box transformer device and its intelligent terminal of the present invention, by setting a one-way control mechanism, using the pressure change of the transformer oil temperature and pressure, the sliding plug moves in the control pipe, thereby controlling the change of the flow path of the transformer oil, enabling the transformer oil in the oil-immersed transformer and the oil storage chamber to achieve one-way circulating flow. And during the flowing process, the oil scale stays at the bottom end of the oil storage chamber, effectively enhancing the smoothness of the transformer oil flow and reducing the probability of the oil scale blocking the flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 is a three-dimensional view of the present invention;

[0029] Figure 2 is an assembled three-dimensional view of the oil-immersed transformer and the conservator body;

[0030] Figure 3 It is a three-dimensional assembly drawing of the corrugated core and the varactor tube;

[0031] Figure 4 It is a three-dimensional assembly drawing of the control tube, the oil outlet pipe and the return pipe;

[0032] Figure 5 It is a cross-sectional view of the present application;

[0033] Figure 6 It is Figure 5 The partial enlarged view at position A in

[0034] In the figure: 1. Box-type main body; 11. Oil-immersed transformer; 2. Oil conservator main body; 21. Corrugated core; 22. Oil storage cavity; 23. Ventilation cavity; 24. Oil outlet pipe; 25. Return pipe; 26. Filter box; 3. Control tube; 31. Sliding plug; 32. Lifting groove; 33. Return hole; 34. Control spring; 4. Separation hopper; 41. Drain pipe; 42. Oil injection pipe; 5. Varactor tube; 51. Diaphragm; 52. Plunger pump. Specific embodiments

[0035] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0036] As Figures 1 to 6 As shown, an energy-saving photovoltaic step-up box transformer device of the present invention includes a box-type main body 1, an oil-immersed transformer 11, and an oil conservator main body 2 installed on the oil-immersed transformer 11;

[0037] It further includes an oil control mechanism installed inside the oil conservator main body 2. The oil control mechanism is used to control the flow path of the transformer oil in the transformer and the oil conservator main body 2. The oil control mechanism includes:

[0038] A corrugated core 21, the corrugated core 21 is installed inside the oil conservator main body 2, and the inner cavity of the oil conservator main body 2 is divided into a non-communicating oil storage cavity 22 and a ventilation cavity 23 by the corrugated core 21;

[0039] An oil outlet pipe 24 and a return pipe 25, the oil outlet pipe 24 and the return pipe 25 are both fixedly installed on the oil conservator, and the oil outlet pipe 24 and the return pipe 25 both extend into the oil storage cavity 22, and the oil outlet pipe 24 has an opening at the bottom end of the oil storage cavity 22, and the return pipe 25 has an opening at the top end of the oil storage cavity 22;

[0040] It further includes a one-way control mechanism, and the one-way control mechanism is used to control the flow path of the transformer oil in the oil outlet pipe 24 and the return pipe 25.

[0041] When using an oil conservator to cooperate with an oil-immersed transformer 11 for storing and releasing transformer oil, in order to enhance the degree of isolation between the transformer oil and the air, and at the same time to avoid the obstruction of the flow of transformer oil caused by oil scale, impurities, etc. in the oil conservator body 2, a oil control mechanism is provided in the present invention to guide and change the flow path of the transformer oil, thereby reducing the probability of equipment failure.

[0042] Specifically, in the present invention, a corrugated core 21 is installed in the oil conservator body 2. The corrugated core 21 is preferably made of stainless steel. Under the pressure of the transformer oil inside, the corrugated core 21 can adaptively expand and contract, so that there is no air inside the corrugated core 21 all the time. At the same time, a breathing hole communicating with the outside is opened on the oil conservator body 2. When the corrugated core 21 expands and contracts, the air pressure inside the oil conservator body 2 can be maintained in balance. During long-term use, when the oil-immersed transformer 11 works, its temperature usually changes from normal temperature to high temperature. During this process, the temperature dissipated by the oil-immersed transformer 11 is conducted into the transformer oil, and the transformer oil is used for cooling and heat dissipation. After the temperature of the transformer oil rises, its volume increases significantly, while the volume of the oil-immersed transformer 11 is constant. Therefore, the oil pressure in the oil-immersed transformer 11 increases. With the assistance of the one-way control mechanism, the transformer oil enters the oil storage cavity 22 through the oil outlet pipe 24, and the transformer oil flows in from the bottom of the oil storage cavity 22. Due to the increase in oil pressure, the corrugated body elongates under the action of the oil pressure. When the oil-immersed transformer 11 stops being used, as the heat contained in the transformer oil continues to dissipate, the temperature of the transformer oil decreases. Under the characteristics of thermal expansion and contraction, the volume of the transformer oil shrinks. At this time, the oil pressure decreases, causing the height of the corrugated core 21 to shrink. With the cooperation of gravity and pressure, the transformer oil in the oil storage cavity 22 flows back into the oil-immersed transformer 11. When flowing back, with the cooperation of the one-way control mechanism, the transformer oil at the top of the oil storage cavity 22 enters the return pipe 25 and flows back into the oil-immersed transformer 11 through the return pipe 25, thereby realizing the circulating flow of the transformer oil. It should be noted that since the temperature dissipated by the oil-immersed transformer 11 after startup will cause the temperature of the transformer oil to rise, and at the same time the transformer oil realizes continuous heat dissipation through heat exchange with the outside. When the oil-immersed transformer 11 stops working, the temperature of the transformer oil gradually decreases. At this time, the transformer oil at the top of the oil conservator has been static for a long time. Therefore, the transformer oil at the top of the oil storage cavity 22 contains less impurities. When the transformer oil flows back, the transformer oil at the top of the oil storage cavity 22 flows back, which can make the impurities stay in the oil storage cavity 22 as much as possible.

[0043] The present invention controls the flow of transformer oil through the oil control mechanism, causing the hot and impurity-rich transformer oil in the oil-immersed transformer 11 to enter from the bottom of the oil storage chamber 22, while the transformer oil that has been standing in the oil storage chamber 22 for a long time is lifted. As a result, the sedimentation path of impurities in the newly entered transformer oil in the oil storage chamber 22 is shortened. When the transformer oil flows back, it starts to flow back from the top of the oil storage chamber 22. On the one hand, the probability of the settled oil scale flowing back into the oil-immersed transformer 11 is reduced. On the other hand, the opening of the return pipe 25 is away from the oil scale, effectively reducing the probability of the oil scale blocking the return pipe 25.

[0044] As a preferred embodiment of the present invention, the return pipe 25 is a telescopic pipe, and the top end of the return pipe 25 is fixedly connected to the top end of the inner cavity of the corrugated core 21.

[0045] The fixed connection between the return pipe 25 and the top end of the corrugated core 21 keeps the distance between the opening of the return pipe 25 and the top end of the corrugated core 21 at a fixed value. In practical applications, as the corrugated core 21 rises and falls, the top end of the return pipe 25 can move synchronously with the top end of the corrugated core 21, so that the transformer oil at the top of the oil storage chamber 22 is always in a state of preferential backflow.

[0046] As a preferred embodiment of the present invention, a filter box 26 is fixedly installed at the top end of the inner cavity of the corrugated core 21, the return pipe 25 extends into the inner cavity of the filter box 26, and the filter box 26 is used to filter the transformer oil.

[0047] To further enhance the impurity removal effect on the transformer oil, a filter box 26 is provided in the present invention. When the transformer oil at the top of the oil storage chamber 22 flows back into the oil-immersed transformer 11 through the return pipe 25, the presence of the filter box 26 can filter the flowing-back transformer oil, thereby further removing impurities from the transformer oil.

[0048] As a preferred embodiment of the present invention, the one-way control mechanism includes:

[0049] A control pipe 3, which is fixedly installed between the oil-immersed transformer 11 and the oil conservator main body 2. The oil outlet pipe 24 is fixedly installed at the top end of the control pipe 3, and the control pipe 3 is in conduction connection with both the oil-immersed transformer 11 and the oil outlet pipe 24;

[0050] A sliding plug 31. The inner cavity of the control pipe 3 is stepped, and the inner cavity of the control pipe 3 is larger at the end close to the oil conservator main body 2 than at the end close to the oil-immersed transformer 11. The sliding plug 31 is slidably installed in the inner cavity of the control pipe 3;

[0051] A return hole 33 is provided. An elevating groove 32 is formed inside the sliding plug 31. The bottom end of the return pipe 25 extends into the elevating groove 32 and is slidably and sealingly connected to the elevating groove 32. A return hole 33 is provided on the sliding plug 31, and the middle of the return hole 33 extends to the side wall of the elevating groove 32.

[0052] A control spring 34 is fixedly installed in the control pipe 3. The control spring 34 is fixedly connected to the sliding plug 31, and the control spring 34 is used to control the initial position of the sliding plug 31.

[0053] In the cycle of expansion and contraction of the transformer oil, the flow path of the transformer oil is controlled by the one-way control mechanism in cooperation with the oil outlet pipe 24 and the return pipe 25. In actual application, when the oil-immersed transformer 11 starts to work, the heat is first transferred to the transformer oil in the oil-immersed transformer 11, thereby increasing the oil pressure in the oil-immersed transformer 11. Under the driving force of the oil pressure, the sliding plug 31 moves towards the oil conservator main body 2 in the control pipe 3. Since the inner cavity of the control pipe 3 is stepped and the diameter of the end close to the oil conservator main body 2 is larger, as the sliding plug 31 moves, the control pipe 3 changes from the closed state in the initial state to the conducting state. The transformer oil in the oil-immersed transformer 11 enters the oil outlet pipe 24 through the control pipe 3 and then flows into the bottom end of the oil storage cavity 22. When the temperature and pressure of the transformer oil in the oil conservator and the oil-immersed transformer 11 are maintained at stable values, at this time, under the action of the control spring 34, the sliding plug 31 descends to block the control pipe 3 again. When the oil-immersed transformer 11 stops working, at this time the equipment does not generate heat and only dissipates heat, which will cause the temperatures of the transformer oil in the oil conservator and the oil-immersed transformer 11 to both decrease. The decrease in the temperature of the transformer oil in the oil conservator will cause the corrugated core 21 to contract, and the decrease in the temperature of the transformer oil in the oil-immersed transformer 11 will cause a negative pressure to be generated in the oil-immersed transformer 11. Under the traction of the negative pressure, the sliding plug 31 will compress the control spring 34 and continue to move downward. As the sliding plug 31 continues to descend, the return hole 33 provided on the sliding plug 31 descends until the return hole 33 is communicated with the return pipe 25. At this time, the static transformer oil in the oil storage cavity 22 passes through the return pipe 25 and the return hole 33 and returns to the oil-immersed transformer 11 until the oil pressures in the oil-immersed transformer 11 and the oil storage cavity 22 are balanced again. At this time, under the action of the control spring 34, the sliding plug 31 will move to the initial position again.

[0054] In the present invention, by providing a one-way control mechanism and utilizing the pressure transformation of the temperature and pressure of the transformer oil, the sliding plug 31 moves within the control pipe 3, thereby controlling the change of the flow path of the transformer oil, enabling the one-way circulation flow of the transformer oil between the oil-immersed transformer 11 and the storage cavity 22. During the flow process, the oil scale stays at the bottom end of the storage cavity 22, effectively enhancing the smoothness of the flow of the transformer oil and reducing the probability of the oil scale blocking the flow channel.

[0055] As a preferred embodiment of the present invention, a partition bucket 4 is fixedly installed inside the oil conservator main body 2. The partition bucket 4 is fixedly installed on the control pipe 3, and the opening of the oil outlet pipe 24 is located above the partition bucket 4.

[0056] The height of the partition bucket 4 gradually decreases from the center of the corrugated core 21 towards the edge. The side wall of the oil outlet pipe 24 has an opening, and the opening direction of the oil outlet pipe 24 is the same as the inclination direction of the partition bucket 4.

[0057] Due to the existence of the partition bucket 4, when the transformer oil is static in the storage cavity 22, the oil scale settles towards the bottom end of the storage cavity 22, causing a part of the oil scale to settle on the partition bucket 4, and the other part to deposit at the bottom of the oil outlet cavity through the gap between the partition bucket 4 and the corrugated core 21. When the transformer oil flows out through the oil outlet pipe 24, under the impact of the oil liquid, the oil scale deposited on the partition bucket 4 moves towards the gap between the partition bucket 4 and the corrugated core 21, and the oil liquid cannot impact the lower part of the partition bucket 4. Therefore, during long-term use, the oil scale is promoted to converge below the partition bucket 4, facilitating the subsequent cleaning and discharging of the oil scale. The setting of the inclined surface of the partition bucket 4 and the opening of the oil outlet pipe 24 further enhances the guiding effect on the moving oil scale, promoting the oil scale to deposit downward through the gap between the partition bucket 4 and the corrugated core 21.

[0058] As a preferred embodiment of the present invention, a sewage discharge pipe 41 is installed at the bottom end of the oil conservator main body 2, and an oil injection pipe 42 is fixedly installed on the control pipe 3. The oil injection pipe 42 extends to the bottom of the lifting groove 32.

[0059] The sewage discharge pipe 41 is arranged at the bottom end of the oil conservator main body 2 and is conductively connected to the storage cavity 22. During the regular maintenance of the oil conservator, by directly opening the oil injection pipe 42, the oil scale deposited at the bottom of the storage cavity 22 can be discharged. The setting of the oil injection pipe 42, when discharging the transformer oil containing impurities, injects new transformer oil again through the oil injection pipe 42. The new transformer oil flows from the return pipe 25 into the filter box 26 and then into the storage cavity 22 through the filter box 26, thereby realizing the backwashing of the filter box 26, cleaning the filter box 26, and reducing the probability of the filter box 26 being blocked.

[0060] As a preferred embodiment of the present invention, a varactor 5 is embedded and installed at the top of the corrugated core 21. A diaphragm 51 is fixedly installed inside the varactor 5. A plunger pump 52 is hermetically installed at the top of the varactor 5. The bottom end of the varactor 5 is conductively connected to the filter box 26.

[0061] Since the maintenance period of the transformer oil is relatively long, during daily use, in order to further reduce the clogging probability of the filter box 26, a varactor 5, a diaphragm 51 and a plunger pump 52 are also provided in the present invention. Through a preset program, the plunger pump 52 is controlled to start periodically. After starting, the plunger pump 52 first extracts the air at the top of the varactor 5, causing the diaphragm 51 to deform upward. At this time, the volume at the bottom end of the varactor 5 increases, promoting the transformer oil to flow towards the filter box 26 and the bottom end of the varactor 5. Subsequently, the plunger pump 52 injects the extracted air back into the top of the varactor 5 again, causing the diaphragm 51 to deform downward, thereby pressurizing the transformer oil in the filter box 26. Under the action of the pressure, the transformer oil in the filter box 26 flows into the oil storage chamber 22, thereby realizing the backwashing of the filter box 26, promoting the oil scale to break away from the filter box 26, and under the action of static settlement, depositing at the bottom of the oil storage chamber 22. Through the periodic operation of the plunger pump 52, the periodic backwashing of the filter box 26 is realized, further reducing the clogging probability of the filter box 26.

[0062] It should be noted that in the present invention, the plunger pump 52 is mainly used to extract and release the air at the upper end of the varactor 5. In other embodiments of the present application, the plunger pump 52 can also be a piston pump or the like.

[0063] An energy-saving photovoltaic step-up box transformer intelligent terminal, which includes an energy-saving photovoltaic step-up box transformer device.

[0064] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving photovoltaic step-up box-type transformer device, comprising a box-type main body, an oil-immersed transformer, and an oil conservator main body installed on the oil-immersed transformer; It is characterized in that: It further includes an oil control mechanism installed inside the oil conservator main body. The oil control mechanism is used to control the flow path of transformer oil between the transformer and the oil conservator main body. The oil control mechanism includes: A corrugated core body, which is installed inside the oil conservator main body. The inner cavity of the oil conservator main body is divided into a non-communicating oil storage cavity and a ventilation cavity by the corrugated core body; An oil outlet pipe and a return pipe, both of which are fixedly installed on the oil conservator. The oil outlet pipe and the return pipe both extend into the oil storage cavity, and the oil outlet pipe opens at the bottom end of the oil storage cavity, and the return pipe opens at the top end of the oil storage cavity; A filter box is fixedly installed at the top end of the inner cavity of the corrugated core body. The return pipe extends into the inner cavity of the filter box, and the filter box is used to filter the transformer oil; It further includes a one-way control mechanism, which is used to control the flow path of transformer oil in the oil outlet pipe and the return pipe. The one-way control mechanism includes: A control pipe, which is fixedly installed between the oil-immersed transformer and the oil conservator main body. The oil outlet pipe is fixedly installed at the top end of the control pipe, and the control pipe is conductively connected to the oil-immersed transformer and the oil outlet pipe; A sliding plug, the inner cavity of the control pipe is stepped, and the inner cavity of the control pipe is larger at the end close to the oil conservator main body than at the end close to the oil-immersed transformer. The sliding plug is slidably installed in the inner cavity of the control pipe; A return hole, a lifting groove is opened inside the sliding plug. The bottom end of the return pipe extends into the lifting groove and is slidably and sealingly connected to the lifting groove. A return hole is opened on the sliding plug, and the middle of the return hole extends to the side wall of the lifting groove; A partition bucket is fixedly installed inside the oil conservator main body. The partition bucket is fixedly installed on the control pipe, and the opening of the oil outlet pipe is located above the partition bucket; The height of the partition bucket gradually decreases from the center of the corrugated core body to the edge. The side wall of the oil outlet pipe is open, and the opening direction of the oil outlet pipe is the same as the inclination direction of the partition bucket.

2. The energy-saving photovoltaic step-up transformer box device according to claim 1, characterized in that: The return pipe is a telescopic pipe, and the top end of the return pipe is fixedly connected to the top end of the inner cavity of the corrugated core body.

3. The energy-saving photovoltaic step-up transformer device according to claim 2, wherein: A control spring is fixedly installed inside the control pipe. The control spring is fixedly connected to the sliding plug, and the control spring is used to control the initial position of the sliding plug.

4. The energy-saving photovoltaic step-up transformer box device according to claim 3, characterized in that: A sewage discharge pipe is installed at the bottom end of the oil conservator main body. An oil injection pipe is fixedly installed on the control pipe, and the oil injection pipe extends to the bottom of the lifting groove.

5. An energy-saving photovoltaic step-up transformer device according to claim 4, characterized in that: A variable volume pipe is inlaid and installed at the top end of the corrugated core body. A diaphragm is fixedly installed inside the variable volume pipe. A plunger pump is sealingly installed at the top end of the variable volume pipe. The bottom end of the variable volume pipe is conductively connected to the filter box.

6. An energy-saving intelligent terminal for photovoltaic step-up box-type transformer, characterized in that: The intelligent terminal includes an energy-saving photovoltaic step-up box-type transformer device as described in claim 5.

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