A power transformer

Abstract

The invention discloses an electric transformer, which relates to the technical field of transformers. Its technical highlights include: a shell and a plurality of heat sinks fixedly mounted on the shell, a piston plate being arranged inside the shell in a liftable manner; a first piston rod being slidably arranged inside each heat sink fin, an upper connecting oil plate being fixedly mounted on the top end of the heat sink fin, a lower connecting oil plate being fixedly mounted on the bottom end of the heat sink fin, a first connecting water plate and a second connecting water plate, a hot water absorption cavity being formed between two adjacent heat sink fins, and a second piston rod being slidably arranged inside each hot water absorption cavity; a water storage cylinder, a piston disk being slidably mounted inside the water storage cylinder, an upper surface of the piston disk being fixedly connected to the piston plate through a connecting rod, the bottom end of the water storage cylinder being connected to the inside of the second connecting water plate through a first water pipe, and the top end of the water storage cylinder being connected to the inside of the first connecting water plate through a second water pipe, and having excellent cooling capacity for transformer oil.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to a power transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Transformers can be divided into distribution transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, reactors, anti-interference transformers, and lightning protection transformers according to their uses.

[0003] Among them, the oil-immersed transformer is a new type of transformer that relies on insulating oil as a cooling medium. The oil-immersed transformer is mainly composed of an iron core, windings, an oil tank, an insulating bushing, a tap changer and a gas relay. The iron core and windings are all immersed in transformer oil, and the transformer oil is used for insulation and cooling. It has a simple structure, is easy to maintain, has good insulation properties and high temperature resistance, and is widely used in power systems.

[0004] A plurality of heat dissipation fins for heat dissipation are fixedly mounted on the shell of the oil-immersed transformer. The heated transformer oil enters the interior of the heat dissipation fins. The heat dissipation fins are in contact with the outside air and transfer the heat to the air to achieve the heat dissipation effect. However, the thermal conductivity of the air is low and the heat on the heat dissipation fins cannot be taken away quickly. Especially in the hot summer, the air temperature is high and the flow rate is slow, which makes the heat dissipation speed of the transformer oil slow. Therefore, in order to solve the above technical problems, the present invention provides a power transformer. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a power transformer having excellent cooling capability for transformer oil.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: an electric transformer, comprising a housing and a plurality of heat dissipation fins fixedly mounted on the housing, wherein a piston plate is provided inside the housing so as to be liftable, and the piston plate divides the inside of the housing into two independent cavities;

[0009] The heat dissipation fins are provided with a heat dissipation oil cavity inside, and a first piston rod is slidably arranged inside each heat dissipation fin. An upper connecting oil plate is fixedly installed on the top end of the heat dissipation fin, and a lower connecting oil plate is fixedly installed on the bottom end of the heat dissipation fin. The upper connecting oil plate and the lower connecting oil plate are both connected with a plurality of heat dissipation oil cavities through a plurality of first connecting ports. An oil pipe group is fixedly installed on the upper connecting oil plate and the lower connecting oil plate. The upper connecting oil plate is connected with a cavity in the outer shell through the oil pipe group, and the lower connecting oil plate is connected with another cavity in the outer shell through the oil pipe group. The transformer also includes:

[0010] A first connecting water plate and a second connecting water plate, wherein the first connecting water plate is fixedly mounted at one end of the plurality of heat dissipation fins in the width direction, and the second connecting water plate is fixedly mounted at the other end of the plurality of heat dissipation fins in the width direction, and a hot water absorption cavity is formed between two adjacent heat dissipation fins, and a second piston rod is slidably arranged in each hot water absorption cavity, and the first connecting water plate and the second connecting water plate are both connected to the plurality of hot water absorption cavities through a plurality of second connecting ports provided thereon;

[0011] A water storage cylinder, the water storage cylinder is buried in the ground, and its top end is fixedly connected to the lower surface of the outer shell through a sealing tube, a piston disk is slidably installed inside the water storage cylinder, and the piston disk divides the interior of the water storage cylinder into two independent cavities, and the upper surface of the piston disk is fixedly connected to the piston plate through a connecting rod, the bottom end of the water storage cylinder is connected to the interior of the second connecting water plate through a first water pipe, and the top end of the water storage cylinder is connected to the interior of the first connecting water plate through a second water pipe.

[0012] Preferably, a first outer tube is fixedly installed on the outer surface of the first water pipe, a second outer tube is fixedly installed on the outer surface of the second water pipe, a first connecting tube is fixedly installed on the top end of the first water pipe, the first connecting tube is fixedly connected to the top end of the second outer tube, a second connecting tube is fixedly installed on the first water pipe, one end of the second connecting tube is fixedly connected to the bottom end of the second outer tube, and a first valve is fixedly installed on the first connecting tube; a third connecting tube is fixedly installed on the top end of the second water pipe, one end of the third connecting tube is fixedly connected to the top end of the first outer tube, a fourth connecting tube is fixedly installed on the bottom end of the second water pipe, one end of the fourth connecting tube is fixedly connected to the bottom end of the first outer tube, and a second valve is fixedly installed on the third connecting tube.

[0013] Preferably, a pair of rotating rods are arranged between the lower surface of the piston plate and the inner bottom surface of the outer shell, and the two rotating rods are rotatably connected. A pair of upper track plates are fixedly installed on the lower surface of the piston plate, and a pair of lower track plates are fixedly installed on the inner bottom surface of the outer shell. An upper track block is slidably installed on each upper track plate, and a lower track block is slidably installed on each lower track plate. The top end of the rotating rod is rotatably connected to the upper track block, and the bottom end of the rotating rod is rotatably connected to the lower track block. A driving assembly is installed on the outer shell, and the driving assembly can rotate the two rotating rods.

[0014] Preferably, the driving assembly includes an electric telescopic rod, a tension spring and a transmission member; the fixed end of the electric telescopic rod is fixedly mounted on the outer shell, the movable end of the electric telescopic rod is fixedly connected to one of the lower track blocks, one end of the transmission member is fixedly connected to one of the lower track blocks, the other end of the transmission member is fixedly connected to the other lower track block, one end of the tension spring is fixedly connected to the other lower track block, and the other end of the tension spring is fixedly connected to the inner surface of the outer shell.

[0015] Preferably, the transmission member includes a wire rope and a guide wheel; one end of the wire rope in the length direction is fixedly connected to one of the lower track blocks, and the other end of the wire rope in the length direction is fixedly connected to the other lower track block, and the guide wheel is rotatably mounted on the inner surface of the outer shell.

[0016] Preferably, a first temperature sensor is fixedly mounted on the inner top of the housing, and a second temperature sensor is fixedly mounted on the lower surface of the piston plate.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a power transformer having the following beneficial effects:

[0019] 1. A piston plate is provided in a liftable manner inside the shell, a first piston rod is slidably provided inside each heat sink fin, an upper connecting oil plate is fixedly installed on the top end of the heat sink fin, a lower connecting oil plate is fixedly installed on the bottom end of the heat sink fin, a hot water absorption cavity is formed between two adjacent heat sink fins, a second piston rod is slidably provided in each hot water absorption cavity, a piston disk is slidably provided inside the water storage cylinder, the bottom end of the water storage cylinder is connected with the inside of the second connecting water plate through the first water pipe, the top end of the water storage cylinder is connected with the inside of the first connecting water plate through the second water pipe, the heat in the transformer oil is absorbed by the water with lower temperature, so that the transformer oil can be quickly reduced to a lower temperature, and since the water storage cylinder is buried underground, the water in the water storage cylinder can be reduced to a lower temperature even in the hot summer, thereby still having excellent cooling ability for the transformer oil.

[0020] 2. A first outer tube is fixedly installed on the outer surface of the first water tube, a second outer tube is fixedly installed on the outer surface of the second water tube, a first connecting tube is fixedly installed on the top end of the first water tube, the first connecting tube is fixedly connected to the top end of the second outer tube, a second connecting tube is fixedly installed on the first water tube, one end of the second connecting tube is fixedly connected to the bottom end of the second outer tube, a third connecting tube is fixedly installed on the top end of the second water tube, one end of the third connecting tube is fixedly connected to the top end of the first outer tube, a fourth connecting tube is fixedly installed on the bottom end of the second water tube, one end of the fourth connecting tube is fixedly connected to the bottom end of the first outer tube; when water that has absorbed a certain amount of heat returns to the inside of the water storage cylinder, it can heat the parts of the first water tube and the second water tube that are exposed to the air, thereby preventing the water in the first water tube and the second water tube from freezing and causing blockage.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the housing in the present invention;

[0025] Figure 3 It is a structural schematic diagram of the oil pipe group and the first connecting water plate in the present invention;

[0026] Figure 4 It is a schematic diagram of the disassembled structure of the first connecting water plate, the heat dissipation fins, the first piston rod and the second piston rod in the present invention;

[0027] Figure 5 It is a schematic diagram of the disassembled structure of the heat dissipation fins, the upper connecting oil plate, the lower connecting oil plate, the first connecting water plate and the second connecting water plate in the present invention;

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the water storage cylinder in the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the first water pipe and the second water pipe in the present invention;

[0030] Figure 8It is a structural schematic diagram of the lower surface of the piston plate in the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the transfer rod of the present invention;

[0032] Fig.10 For the present invention Fig. 9 A magnified view of part A in FIG.

[0033] Fig.11 It is a schematic diagram of the structure of the steel wire rope, guide wheel, tension spring and lower track block in the present invention.

[0034] In the figure:

[0035] 10. housing; 101. first temperature sensor; 11. piston plate; 111. second temperature sensor;

[0036] 20, heat dissipation fins; 201, heat dissipation oil chamber; 202, hot water absorption chamber; 21, first piston rod; 22, upper connecting oil plate; 23, connecting oil pipe; 231, first connecting pipe; 232, second connecting pipe; 233, third connecting pipe; 24, lower connecting oil plate; 241, first connecting port;

[0037] 30, first connecting water plate; 301, second connecting port; 302, fourth connecting pipe; 31, second connecting water plate; 311, fifth connecting pipe; 32, second piston rod;

[0038] 40. water storage cylinder; 41. piston plate; 42. sealing tube; 43. connecting rod;

[0039] 50, first water pipe; 501, first outer tube; 502, first connecting tube; 5021, first valve; 503, second connecting tube; 51, second water pipe; 511, second outer tube; 512, third connecting tube; 5121, second valve; 513, fourth connecting tube;

[0040] 60. rotating rod; 61. upper track plate; 611. upper track block; 62. lower track plate; 621. lower track block; 6211. L-shaped plate; 63. electric telescopic rod; 64. steel wire rope; 65. guide wheel; 66. tension spring. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-11 The principles and features of the present invention are described, and the examples given are only used to explain the present invention and are not used to limit the scope of the present invention. In the following paragraphs, the present invention is described in more detail by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0042] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0044] Embodiment 1

[0045] Please combine Figures 1 to 11 As shown, the present invention provides a power transformer, which includes a housing 10, and a plurality of heat dissipation fins 20 are fixedly mounted on four sides of the housing 10, and the plurality of heat dissipation fins 20 on each side of the housing 10 are arranged at equal intervals;

[0046] The interior of the housing 10 is provided with a piston plate 11 which can be raised and lowered, and the piston plate 11 divides the interior of the housing 10 into two independent cavities;

[0047] A heat dissipation oil chamber 201 is provided inside the heat dissipation fin 20. A first piston rod 21 is slidably provided inside each heat dissipation fin 20, and the first piston rod 21 divides the heat dissipation oil chamber 201 into two parts. An upper connecting oil plate 22 is fixedly installed on the top end of the heat dissipation fin 20, and a lower connecting oil plate 24 is fixedly installed on the bottom end of the heat dissipation fin 20.

[0048] The upper oil communication plate 22 and the lower oil communication plate 24 are both connected to the multiple heat dissipation oil chambers 201 through multiple first communication ports 241. The upper oil communication plate 22 and the lower oil communication plate 24 are both fixedly installed with an oil pipe group, which includes a connecting oil pipe 23, a first connecting pipe 231 and a second connecting pipe 232. The first connecting pipe 231 and the second connecting pipe 232 are both fixedly connected to the connecting oil pipe 23. When the connecting oil pipe 23 is connected to the upper oil communication plate 22, the second connecting pipe 232 is fixedly connected to the upper oil communication plate 22, and the first connecting pipe 231 is fixedly connected to the top end of the housing 10; when the connecting oil pipe 23 is connected to the lower oil communication plate 24, the second connecting pipe 232 is fixedly connected to the lower oil communication plate 24, and the first connecting pipe 231 is fixedly connected to the bottom end of the housing 10; since the inner top of the housing 10 is fixedly installed A first temperature sensor 101 is installed, and a second temperature sensor 111 is fixedly installed on the lower surface of the piston plate 11. Therefore, the first temperature sensor 101 and the second temperature sensor 111 can respectively detect the temperature of the transformer oil at the top of the two cavities. When the first temperature sensor 101 detects that the temperature of the transformer oil is too high, the piston plate 11 moves from the bottom of the shell 10 to the top of the shell 10, and pushes the transformer oil with too high temperature into the upper connecting oil plate 22, and then into the heat dissipation oil cavity 201, and the transformer oil in the heat dissipation oil cavity 201 that has completed heat dissipation is pushed into the lower connecting oil plate 24 by the first piston rod 21 until it enters the cavity below the piston plate 11, so that the transformer oil with lower temperature enters the shell 10, and the transformer oil with too high temperature enters the heat dissipation oil cavity 201 for heat dissipation; the transformer also includes:

[0049] A first connecting water plate 30 and a second connecting water plate 31, wherein the first connecting water plate 30 is fixedly mounted at one end of the plurality of heat dissipation fins 20 in the width direction, and the second connecting water plate 31 is fixedly mounted at the other end of the plurality of heat dissipation fins 20 in the width direction, and a hot water absorption chamber 202 is formed between two adjacent heat dissipation fins 20, and a second piston rod 32 is slidably arranged in each hot water absorption chamber 202, and the first connecting water plate 30 and the second connecting water plate 31 are both connected to the plurality of hot water absorption chambers 202 through a plurality of second connecting ports 301 provided thereon;

[0050] The water storage cylinder 40 has its top end fixedly connected to the lower surface of the shell 10 through a sealing tube 42, and a piston disk 41 is slidably installed inside the water storage cylinder 40, and the piston disk 41 divides the interior of the water storage cylinder 40 into two independent cavities. The upper surface of the piston disk 41 is fixedly connected to the piston plate 11 through a connecting rod 43, and the bottom end of the water storage cylinder 40 is connected to the interior of the second connecting water plate 31 through a first water pipe 50, and the first water pipe 50 is connected to a cavity in the water storage cylinder 40, and the top end of the water storage cylinder 40 is connected to the interior of the first connecting water plate 30 through a second water pipe 51, and the second water pipe 51 is connected to another cavity of the water storage cylinder 40; when the piston plate 11 is lifted and lowered inside the shell 10, the piston plate 11 will drive the piston disk 41 to lift and lower inside the water storage cylinder 40, and when the piston disk 41 moves toward the top of the water storage cylinder 40, the piston disk 41 will move the piston disk 4 The water in the upper cavity of the piston plate 41 is sent to the first connecting water plate 30 through the second water pipe 51 until the water is sent to the heat absorbing cavity 202. The water in the heat absorbing cavity 202 that has absorbed a certain amount of heat is pushed to the second connecting water plate 31 by the second piston rod 32, and enters the lower cavity of the piston plate 41 through the first water pipe 50. Water is a liquid, and its thermal conductivity is greater than that of gas. The water entering the heat absorbing cavity 202 can quickly absorb the heat of the transformer oil in the heat dissipation fins 20, so that the transformer oil can be quickly cooled down. Since the water storage cylinder 40 is buried underground, the soil in the underground is solid and has a strong thermal conductivity, which can quickly absorb the heat of the water in the water storage cylinder 40. In the hot summer, the temperature of the underground is lower than the surface temperature, which can reduce the water in the water storage cylinder 40 to a lower temperature, and thus has excellent cooling ability for the transformer oil even in the hot summer.

[0051] It should be noted that the four sides of the outer shell 10 are each provided with a first connecting water plate 30, a second connecting water plate 31, an upper connecting oil plate 22 and a lower connecting oil plate 24; two adjacent connecting oil pipes 23 are fixedly connected by a third connecting pipe 233, two adjacent first connecting water plates 30 are fixedly connected by a fourth connecting pipe 302, and two adjacent second connecting water plates 31 are fixedly connected by a fifth connecting pipe 311.

[0052] Embodiment 2

[0053] Based on the first embodiment, the solution in the first embodiment is further detailed in combination with the following specific working method, as described below for details.

[0054] A pair of rotating rods 60 are arranged between the lower surface of the piston plate 11 and the inner bottom surface of the shell 10, and the two rotating rods 60 are rotatably connected. A pair of upper track plates 61 are fixedly installed on the lower surface of the piston plate 11, and a pair of lower track plates 62 are fixedly installed on the inner bottom surface of the shell 10. An upper track block 611 is slidably installed on each upper track plate 61, and a lower track block 621 is slidably installed on each lower track plate 62. The top end of the rotating rod 60 is rotatably connected to the upper track block 611, and the bottom end of the rotating rod 60 is rotatably connected to the lower track block 621. A driving assembly is installed on the shell 10, which can rotate the two rotating rods 60; when the two rotating rods 60 rotate, the piston plate 11 can be driven to rise or fall inside the shell 10; wherein the driving assembly includes an electric telescopic rod 63, a tension spring 66 and a transmission member; the fixed end of the electric telescopic rod 63 is fixedly installed on the shell 10, and the movable end of the electric telescopic rod 63 is fixedly connected to one of the lower track blocks 621, and the transmission member is composed of a wire rope 64 and a guide wheel 65, one end of the wire rope 64 in the length direction is fixedly connected to one of the lower track blocks 621, and the other end of the wire rope 64 in the length direction is fixedly connected to the other lower track block 621, and the guide wheel 65 is rotatably installed on the inner surface of the shell 10. When the movable end of the electric telescopic rod 63 is extended, it will push one of the lower track blocks 621 to move, and during the movement of the lower track block 621, the other lower track block 621 will be pulled to move by the wire rope 64, so that the two lower track blocks 621 move relative to each other. At this time, the two rotating rods 60 push the piston plate 11 to move toward the top of the shell 10 by rotation; an L-shaped plate 6211 is fixedly installed on the other lower track block 621, and the tension spring 66 is fixedly installed between the L-shaped plate 6211 and the shell 10. When the movable end of the electric telescopic rod 63 is retracted, the other lower track block 621 moves under the elastic force of the tension spring 66, and at this time, the two lower track blocks 621 move away from each other, and the two rotating rods 60 pull the piston plate 11 to move toward the bottom of the shell 10.

[0055] Embodiment 3

[0056] The water storage cylinder 40 is buried in the ground, and the transformer is installed at a higher position. Part of the first water pipe 50 and the second water pipe 51 are exposed to the air. In the cold winter, the water inside the first water pipe 50 and the second water pipe 51 is likely to freeze and block the internal channels of the first water pipe 50 and the second water pipe 51. In order to solve this problem, a first outer tube 501 is fixedly installed on the outer surface of the first water pipe 50, a second outer tube 511 is fixedly installed on the outer surface of the second water pipe 51, and a first outer tube 521 is fixedly installed on the top of the first water pipe 50. The connecting pipe 502 is fixedly connected to the top of the second outer tube 511, the second connecting pipe 503 is fixedly installed on the first water pipe 50, one end of the second connecting pipe 503 is fixedly connected to the bottom end of the second outer tube 511, and the first connecting pipe 502 is fixedly installed with a first valve 5021; the third connecting pipe 512 is fixedly installed on the top of the second water pipe 51, one end of the third connecting pipe 512 is fixedly connected to the top of the first outer tube 501, and the fourth connecting pipe 513 is fixedly installed on the bottom end of the second water pipe 51, and one end of the fourth connecting pipe 513 is fixedly installed. The end is fixedly connected to the bottom end of the first outer tube 501, and the second valve 5121 is fixedly installed on the third connecting pipe 512; when the water that has absorbed a certain amount of heat is discharged from the first water pipe 50, the first valve 5021 is in an open state, and the water that has absorbed the heat enters the second outer tube 511 through the first connecting pipe 502, and finally returns to the first water pipe 50 through the second connecting pipe 503. When the water that has absorbed a certain amount of heat is discharged from the second water pipe 51, the water that has absorbed the heat enters the first outer tube 501 through the third connecting pipe 512, and finally returns to the first water pipe 50 through the second connecting pipe 503. The four-way connecting pipe 513 returns to the second water pipe 51. Therefore, when the water that has absorbed a certain amount of heat returns to the inside of the water storage cylinder 40, the parts of the first water pipe 50 and the second water pipe 51 exposed to the air can be heated to prevent the water in the first water pipe 50 and the second water pipe 51 from freezing and causing blockage. When it is not a cold season, the second valve 5121 and the first valve 5021 can be closed, so that the water that has absorbed a certain amount of heat will not return to the inside of the water storage cylinder 40 and will not affect the temperature of the water leaving the inside of the water storage cylinder 40.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A power transformer, comprising a housing (10) and a plurality of heat dissipation fins (20) fixedly mounted on the housing (10), characterized in that: in, A piston plate (11) is provided inside the housing (10) in a liftable manner, and the piston plate (11) divides the interior of the housing (10) into two independent cavities; A heat dissipation oil cavity (201) is provided inside the heat dissipation fin (20), and a first piston rod (21) is slidably arranged inside each heat dissipation fin (20). An upper connecting oil plate (22) is fixedly mounted on the top end of the heat dissipation fin (20), and a lower connecting oil plate (24) is fixedly mounted on the bottom end of the heat dissipation fin (20). The upper connecting oil plate (22) and the lower connecting oil plate (24) are both connected to the plurality of heat dissipation oil cavities (201) via a plurality of first connecting ports (241) provided thereon. An oil pipe group is fixedly mounted on the upper connecting oil plate (22) and the lower connecting oil plate (24). The upper connecting oil plate (22) is connected to a cavity in the housing (10) via the oil pipe group, and the lower connecting oil plate (24) is connected to another cavity in the housing (10) via the oil pipe group. The transformer further comprises: A first connecting water plate (30) and a second connecting water plate (31), wherein the first connecting water plate (30) is fixedly mounted at one end of the plurality of heat dissipation fins (20) in the width direction, and the second connecting water plate (31) is fixedly mounted at the other end of the plurality of heat dissipation fins (20) in the width direction, and a hot water absorption cavity (202) is formed between two adjacent heat dissipation fins (20), and a second piston rod (32) is slidably arranged in each hot water absorption cavity (202), and the first connecting water plate (30) and the second connecting water plate (31) are both connected to the plurality of hot water absorption cavities (202) via a plurality of second connecting ports (301) provided thereon; A water storage cylinder (40), the water storage cylinder (40) is buried underground, the top end of the water storage cylinder (40) is fixedly connected to the lower surface of the housing (10) via a sealing tube (42), a piston disc (41) is slidably mounted inside the water storage cylinder (40), the piston disc (41) divides the inside of the water storage cylinder (40) into two independent cavities, the upper surface of the piston disc (41) is fixedly connected to the piston plate (11) via a connecting rod (43), the bottom end of the water storage cylinder (40) is connected to the inside of the second connecting water plate (31) via a first water pipe (50), and the top end of the water storage cylinder (40) is connected to the inside of the first connecting water plate (30) via a second water pipe (51); A pair of rotating rods (60) are arranged between the lower surface of the piston plate (11) and the inner bottom surface of the outer shell (10), and the two rotating rods (60) are rotatably connected. A pair of upper track plates (61) are fixedly mounted on the lower surface of the piston plate (11), and a pair of lower track plates (62) are fixedly mounted on the inner surface of the outer shell (10). An upper track block (611) is slidably mounted on each upper track plate (61), and a lower track block (621) is slidably mounted on each lower track plate (62). The top end of the rotating rod (60) is rotatably connected to the upper track block (611), and the bottom end of the rotating rod (60) is rotatably connected to the lower track block (621). A driving assembly is mounted on the outer shell (10), and the driving assembly is capable of rotating the two rotating rods (60).

2. A power transformer according to claim 1, characterized in that: A first outer tube (501) is fixedly mounted on the outer surface of the first water tube (50), a second outer tube (511) is fixedly mounted on the outer surface of the second water tube (51), a first connecting tube (502) is fixedly mounted on the top end of the first water tube (50), the first connecting tube (502) is fixedly connected to the top end of the second outer tube (511), a second connecting tube (503) is fixedly mounted on the first water tube (50), one end of the second connecting tube (503) is fixedly connected to the bottom end of the second outer tube (511), A first valve (5021) is fixedly mounted on the first connecting pipe (502); a third connecting pipe (512) is fixedly mounted on the top end of the second water pipe (51), one end of the third connecting pipe (512) is fixedly connected to the top end of the first outer tube (501); a fourth connecting pipe (513) is fixedly mounted on the bottom end of the second water pipe (51), one end of the fourth connecting pipe (513) is fixedly connected to the bottom end of the first outer tube (501); and a second valve (5121) is fixedly mounted on the third connecting pipe (512).

3. A power transformer according to claim 1, characterized in that: The driving assembly comprises an electric telescopic rod (63), a tension spring (66) and a transmission member; The fixed end of the electric telescopic rod (63) is fixedly mounted on the housing (10); the movable end of the electric telescopic rod (63) is fixedly connected to one of the lower track blocks (621); one end of the transmission member is fixedly connected to one of the lower track blocks (621); the other end of the transmission member is fixedly connected to the other lower track block (621); one end of the tension spring (66) is fixedly connected to the other lower track block (621); and the other end of the tension spring (66) is fixedly connected to the inner surface of the housing (10).

4. A power transformer according to claim 3, characterized in that: The transmission member comprises a steel wire rope (64) and a guide wheel (65); One end of the steel wire rope (64) in the length direction is fixedly connected to one of the lower track blocks (621), and the other end of the steel wire rope (64) in the length direction is fixedly connected to the other lower track block (621). The guide wheel (65) is rotatably mounted on the inner surface of the housing (10).

5. A power transformer according to claim 1, characterized in that: A first temperature sensor (101) is fixedly mounted on the inner top of the housing (10), and a second temperature sensor (111) is fixedly mounted on the lower surface of the piston plate (11).

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