A multifunction distribution transformer for distribution line ice melting

Abstract

The application discloses a multifunctional distribution transformer for distribution line ice melting, which comprises a three-phase transformer body, a cooling mechanism is arranged on the left side of the three-phase transformer body and is used for heat dissipation of the three-phase transformer body; the cooling mechanism comprises an oil pillow, mounting racks are connected to the bottom sides of the oil pillow, mounting blocks are connected to the bottom of the mounting racks, the mounting blocks are connected with the top of the three-phase transformer body through bolts, and an insulating plate is connected with the inner wall of the oil pillow. Heat absorbed by insulation is released to the outside through the condenser, so that the oil is cooled, the cooled oil flows into the oil pillow through the oil inlet pipe, and then flows back to the three-phase transformer body through the oil injection pipe, so that the oil forms a circulation, and the cooling effect of the three-phase transformer body is maintained through the exchange of hot and cold oil.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a multifunctional distribution transformer for distribution line ice melting. BACKGROUND

[0002] As one of the main power transmission and transformation equipment in the substation, the transformer has a core position in the substation, and can be said to be the heart of the substation. The running state of the transformer directly affects the whole substation. Among them, large power transformers are mostly oil-immersed transformers. The characteristic of oil-immersed transformer is that oil is used as the heat dissipation and insulation medium of the transformer winding and core. The hazards of transformer operation in high temperature environment mainly include insulation damage, fire risk and significant shortening of service life. For example, insulation damage: high temperature can cause the performance of the insulation material inside the transformer to decrease, reducing its withstand voltage capacity and mechanical strength. According to IEC354 standard, when the hottest point temperature of the transformer reaches 140℃, bubbles will be generated in the oil, which will further reduce the insulation performance or cause flashover, thereby causing the transformer to be damaged. Fire risk: the oil and other organic combustible materials inside the transformer are prone to fire and explosion under high temperature. In addition, if the protection device of the transformer fails or is improperly set, it is more likely to cause fire due to overheating when encountering short circuit or overload. Shortened service life: high temperature can accelerate the aging process of the insulation material of the transformer, shortening its service life. For example, the average temperature rise limit of the winding of the oil-immersed transformer is 65K, the top oil temperature rise is 55K, and the core and oil tank are 80K. Exceeding these temperature limits will seriously affect the service life of the transformer. In summary, high temperature environment has a great negative impact on the safe operation and service life of the transformer, so appropriate cooling measures and management strategies need to be taken to ensure the safe operation of the transformer. SUMMARY

[0003] In view of the above problems existing in the prior art multifunctional distribution transformer for distribution line ice melting, the present application is proposed.

[0004] Therefore, the purpose of the present application is to provide a multifunctional distribution transformer for distribution line ice melting.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a three-phase transformer body is provided, a cooling mechanism is arranged on the left side of the three-phase transformer body, and the three-phase transformer body is cooled;

[0006] The cooling mechanism comprises an oil pillow, two mounting frames are connected to the bottom of the oil pillow, a mounting block is connected to the bottom of the mounting frame, the mounting block is connected to the top of the three-phase transformer body through bolts, and a partition plate is connected to the inner wall of the oil pillow.

[0007] As a kind of preferred scheme of the multifunctional distribution transformer for distribution line ice melting of the application, wherein: the lower part of the partition is provided with through hole, the oil passes through the through hole at a faster flow rate by the through hole with smaller aperture, the inner front surface of the oil pillow is provided with oil filter pipe, and the oil filter pipe is connected with the through hole at corresponding position.

[0008] As a kind of preferred scheme of the multifunctional distribution transformer for distribution line ice melting of the application, wherein: the inner wall of the oil filter pipe is connected with filter screen, the filter screen is spherical convex, and the inner wall of the oil filter pipe is connected with stop ring at the front surface of the filter screen.

[0009] As a kind of preferred scheme of the multifunctional distribution transformer for distribution line ice melting of the application, wherein: the surface of the oil filter pipe is provided with arc-shaped scraper, the inner part of the oil filter pipe is rotatably connected with impeller, and the impeller is connected with the arc-shaped scraper through rotating shaft.

[0010] As a kind of preferred scheme of the multifunctional distribution transformer for distribution line ice melting of the application, wherein: the lower part of the oil pillow is provided with heat dissipation box, the two sides of the heat dissipation box are connected with mounting plate, the mounting plate is connected with three-phase transformer body through bolt, the inner part of the heat dissipation box is provided with condenser, the oil pillow is communicated with the inner part of three-phase transformer body through oil injection pipe, the condenser is connected with the oil pillow through oil inlet pipe, and the condenser is communicated with the inner part of three-phase transformer body through oil extraction pipe, the inner wall bottom of the oil pillow is connected with oil pump at the position of the oil injection pipe, and the oil outlet end of the oil pump is connected with the oil injection pipe.

[0011] As a kind of preferred scheme of the multifunctional distribution transformer for distribution line ice melting of the application, wherein: the bottom of the oil pillow is rotatably connected with rotating rod, the rotating rod is respectively distributed at one side of the partition, the rotating rod is staggered with the through hole, the top of the rotating rod is connected with rotating plate, the bottom of the rotating plate is connected with fan blade, the top of the heat dissipation box is respectively connected with air inlet pipe at the position of the fan blade, and the rotating connection part of the oil pillow and the rotating rod is provided with shaft seal.

[0012] As a kind of preferred scheme of the multifunctional distribution transformer for distribution line ice melting of the application, wherein: the top of the oil pillow is connected with pressure relief pipe above the oil pump, and the inner wall of the pressure relief pipe is slidably connected with piston pipe.

[0013] As a kind of preferred scheme of the multifunctional distribution transformer for distribution line ice melting of the application, wherein: the top of the inner wall of the piston pipe is connected with supporting ring, the inner wall of the piston pipe is connected with sealing ring below the supporting ring, the top of the sealing ring is connected with sealing plug, the third spring is connected between the sealing plug and the supporting ring, and the top of the sealing plug is connected with protective cover.

[0014] As a preferred scheme of the multifunctional distribution transformer for ice melting of distribution line, the inner wall of the air inlet pipe is slidably connected with a sliding ring, and the inner wall of the sliding ring is connected with a dust screen.

[0015] As a preferred scheme of the multifunctional distribution transformer for ice melting of distribution line, the inner wall of the air inlet pipe is slidably connected with a sliding ring, and the inner wall of the sliding ring is connected with a dust screen.

[0016] The oil liquid in the three-phase transformer body can absorb the heat generated by the operation inside, effectively cooling the heat generating components inside the three-phase transformer body, prolonging the service life thereof, and driving the oil liquid to flow in the three-phase transformer body through the oil pump, which is uniformly heated, to avoid the problem of heat absorption saturation of the oil liquid in a static state, causing the heat absorption effect to decrease. The oil liquid absorbing heat flows from the three-phase transformer body through the oil extraction pipe and the condenser, releases the heat absorbed by the insulation to the outside through the condenser, to achieve the purpose of cooling the oil liquid. The cooled oil liquid flows into the oil pillow through the oil inlet pipe and then flows back to the three-phase transformer body through the oil injection pipe. The oil liquid forms a circulation, and the cooling effect of the three-phase transformer body is maintained through the exchange of hot and cold oil liquids. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0018] Figure 1 The overall structure of the multifunctional distribution transformer for ice melting of distribution line of the present application is shown in the figure.

[0019] Figure 2 The structure of the cooling mechanism described in the present application is shown in the figure.

[0020] Figure 3 The structure of the oil pillow and its components described in the present application is shown in the figure.

[0021] Figure 4 The internal structure of the heat dissipation box described in the present application is shown in the figure.

[0022] Figure 5The structure diagram of the air inlet pipe.

[0023] Figure 6 The structure diagram of the air inlet pipe. Figure 5 The enlarged view of A in the figure.

[0024] Figure 7 The internal structure diagram of the pressure relief pipe.

[0025] Figure 8 The internal structure diagram of the oil pillow.

[0026] Figure 9 The internal structure diagram of the oil filter pipe.

[0027] Figure 10 The device route diagram of the first scheme.

[0028] Figure 11 The device route diagram of the second scheme. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0030] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein, that the present application can be practiced with other than the described implementations, and that the present application can be practiced with different or additional components. Therefore, the specific details set forth in the following description are by way of examples and not intended to limit the present application.

[0031] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or selectively excludes other embodiments.

[0032] Thirdly, the present application is described in detail in combination with the schematic diagram. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure will be partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in the actual manufacture.

[0033] Embodiment 1, refer to Figures 1 to 6The utility model provides a kind of multifunctional distribution transformer for distribution line ice melting, including three-phase transformer body A, cooling mechanism B is provided at the left side of three-phase transformer body A, for heat dissipation to three-phase transformer body A, cooling mechanism B includes oil pillow 100, the bottom of oil pillow 100 is connected with mounting bracket 101 on both sides, the bottom of mounting bracket 101 is connected with mounting block 102, mounting block 102 is connected with the top of three-phase transformer body A by bolt,

[0034] The inside of oil pillow 100 is divided into multiple spaces by partition plate 108, so that the oil needs to pass through each space in order when entering, to reduce the temperature influence between each space,

[0035] A through hole 108a is formed below partition plate 108, the oil passes through the through hole 108a at a faster flow rate by forming a through hole 108a with a small aperture,

[0036] By setting filter oil pipe 106, the oil will first enter filter oil pipe 106 before entering through hole 108a,

[0037] The inner wall of filter oil pipe 106 is connected with filter oil screen 106a, filter oil screen 106a is spherical convex, and the position of filter oil pipe 106 inner wall in front of filter oil screen 106a is connected with stop ring 106d

[0038] Filter oil screen 106a filters the oil entering filter oil pipe 106, to facilitate intercepting and filtering carbon particles that may be produced by cracking of insulating oil due to local overheating or discharge, to avoid re-entering three-phase transformer body A during oil circulation, to avoid affecting the normal operation of the transformer due to the generated particulate matter, and to reduce the problem of reducing the insulation performance of the oil,

[0039] Arc-shaped scraper 106c is arranged on the surface of filter oil pipe 106, and impeller 106b is rotatably connected inside filter oil pipe 106, and impeller 106b is connected with arc-shaped scraper 106c through rotating shaft,

[0040] The oil flow pushes impeller 106b inside filter oil pipe 106 to rotate, to facilitate rotating arc-shaped scraper 106c, to facilitate cleaning the surface of filter oil screen 106a, to avoid affecting the oil circulation rate due to the blockage of filter oil screen 106a.

[0041] In this embodiment, by setting the oil filter pipe 106, the oil entering the through hole 108a will first enter the oil filter pipe 106, and the oil filter screen 106a will filter the oil entering the oil filter pipe 106, so as to intercept and filter the carbon particles that may be produced due to local overheating or discharge of the insulating oil, avoid re-entering the three-phase transformer body A during the circulation of the oil, avoid affecting the normal operation of the transformer due to the generated particulate matter, and reduce the problem of reducing the insulation performance of the oil. When the oil flows, the impeller 106b in the oil filter pipe 106 is rotated to facilitate the rotation of the arc-shaped scraper 106c to facilitate the cleaning of the surface of the oil filter screen 106a, and avoid affecting the oil circulation rate due to the blockage of the oil filter screen 106a.

[0042] Embodiment 2

[0043] Referring to Figures 2 to 8 The difference between this embodiment and the first embodiment is that the oil pillow 100 is provided below the heat dissipation box 200, the heat dissipation box 200 is connected with the mounting plate 202 on both sides, and the mounting plate 202 is connected with the three-phase transformer body A through bolts, the heat dissipation box 200 is provided with a condenser 201 inside, the oil pillow 100 is communicated with the inside of the three-phase transformer body A through the oil injection pipe 300, the condenser 201 is connected with the oil pillow 100 through the oil inlet pipe 400, and the condenser 201 is communicated with the inside of the three-phase transformer body A through the oil extraction pipe 500, the oil pump 107 is connected with the oil injection pipe 300 at the position of the oil injection pipe 300 on the inner wall of the oil pillow 100, and the oil outlet end of the oil pump 107 is connected with the oil injection pipe 300,

[0044] When the three-phase transformer body A is operated, the oil in the three-phase transformer body A will absorb the heat generated inside due to operation to ensure the stability of its operation, and the oil pump 107 drives the oil to flow in the three-phase transformer body A, which is uniformly heated to avoid the problem that the oil in a static state is saturated due to local heat absorption, resulting in a decrease in heat absorption effect. The oil that absorbs heat flows from the inside of the three-phase transformer body A through the oil extraction pipe 500, and the condenser 201 releases the heat absorbed by the insulation to the outside to achieve the purpose of cooling the oil. The cooled oil flows into the oil pillow 100 through the oil inlet pipe 400, and then flows back to the three-phase transformer body A through the oil injection pipe 300. The oil forms a circulation, and the cooling effect of the three-phase transformer body A is maintained through the exchange of hot and cold oil,

[0045] The bottom of the oil pillow 100 is rotationally connected with a rotating rod 109a, and the rotating rod 109a is distributed at one side of the partition plate 108, and the rotating rod 109a is staggered with the through hole 108a, the top of the rotating rod 109a is connected with a rotating plate 109b, the bottom of the rotating plate 109b is connected with a fan blade 109, the top of the heat dissipation box 200 is connected with an air inlet pipe 203 corresponding to the position of the fan blade 109, and the rotating connection between the oil pillow 100 and the rotating rod 109a is provided with a shaft seal,

[0046] The oil leakage can be effectively prevented. When the oil circulates, the rotating plate 109b connected with the rotating rod 109a is pushed from each through hole 108a, thereby driving the fan blade 109 below to rotate. The airflow is driven to flow into the heat dissipation box 200 through the air inlet pipe 203, and the airflow quickly carries away the heat dissipated by the condenser 201, so as to improve the cooling effect of the oil, and to ensure that the oil is always at a suitable working temperature,

[0047] The top of the oil pillow 100 is connected with a pressure relief pipe 105 above the oil pump 107, and the inner wall of the pressure relief pipe 105 is slidably connected with a piston pipe 105a,

[0048] When the pressure of each cavity of the oil is saturated, the gas or oil will gather in the pressure relief pipe 105 at the highest position, thereby extruding the piston pipe 105a to make it partially extend out of the pressure relief pipe 105, so as to increase the containing space of the oil. When the pressure in each cavity is restored, the piston pipe 105a will be retracted,

[0049] The top of the inner wall of the piston pipe 105a is connected with a supporting ring 105d, the position below the supporting ring 105d of the inner wall of the piston pipe 105a is connected with a sealing ring 105b, the upper side of the sealing ring 105b is connected with a sealing plug 105c, the third spring 105e is connected between the sealing plug 105c and the supporting ring 105d, and the top of the sealing plug 105c is connected with a protective cover 105f,

[0050] By connecting the protective cover 105f on the top of the sealing plug 105c, when the piston pipe 105a does not release pressure, the protective cover 105f will always cover the piston pipe 105a to play a protective role, avoiding the problem that the piston pipe 105a is blocked and fails to release pressure. One end of the front of the oil pillow 100 is connected with an oil supplement port 103 and a liquid level observation strip 104. The oil supplement port 103 is used to supplement new oil, and the liquid level observation strip 104 is used to observe the liquid level in the oil pillow 100.

[0051] In this embodiment, the oil is driven by the oil pump 107 to flow inside the three-phase transformer body A, which is uniformly heated to avoid the problem that the oil in a static state is saturated due to local heat absorption, resulting in a decrease in heat absorption effect. The oil absorbing heat flows from the inside of the three-phase transformer body A through the oil extraction pipe 500 to the condenser 201, releases the heat absorbed by the insulation to the outside through the condenser 201, and cools the oil. The cooled oil flows into the oil pillow 100 through the oil inlet pipe 400, and then flows back to the three-phase transformer body A through the oil injection pipe 300. The oil forms a circulation, and the cooling effect of the three-phase transformer body A is maintained by the exchange of hot and cold oil. The oil circulates, and when it passes through each through hole 108a, it pushes the rotating rod 109a connected to the rotating plate 109b, thereby driving the fan blade 109 below to rotate. The airflow is driven to flow by the rotation of the fan blade 109, enters the heat sink 200 through the air inlet pipe 203, and carries away the heat emitted by the condenser 201 as soon as possible through the flowing airflow, thereby improving the cooling effect of the oil and ensuring that the oil is always at a suitable working temperature.

[0052] The remaining structure is the same as that of Example 1.

[0053] Example 3

[0054] Referring to Figures 2 to 9 The difference between this embodiment and the above embodiments is that the inner wall of the air inlet pipe 203 is slidingly connected with a slip ring 203a, the inner wall of the slip ring 203a is connected with a dust screen 203a-1,

[0055] By providing the dust screen 203a-1, dust entering the air inlet pipe 203 can be effectively intercepted, and the dust adhering to the condenser 201 after entering the heat sink 200 is avoided, which affects the heat release rate of the condenser 201,

[0056] The inner wall of the air inlet pipe 203 is connected with a connecting ring 203b below the sliding ring 203a, a first spring 203c is connected between the connecting ring 203b and the sliding ring 203a, sliding grooves 203a-2 are respectively arranged at both sides of the sliding ring 203a, a slanted sliding block 203a-3 is slidably connected to the inner wall of the sliding groove 203a-2, a second spring 203a-4 is connected between the slanted sliding block 203a-3 and the inner wall of the sliding groove 203a-2, and a vibrating piece 203a-5 is connected to the top of the sliding ring 203a and corresponds to the slanted sliding block 203a-3,

[0057] When the dust screen 203a-1 intercepts too much dust and is blocked seriously, the wind area of the dust screen 203a-1 increases, the thrust generated by the airflow is greater than the tension of the first spring 203c at this time, the dust screen 203a-1 in the sliding ring 203a sinks, when the sliding ring 203a leaves the sliding groove 203a-2, the tension of the second spring 203a-4 will pop out the slanted sliding block 203a-3, the slanted sliding block 203a-3 knocks the vibrating piece 203a-5, the dust screen 203a-1 in the sliding ring 203a vibrates, the dust adhering to the surface is loosened and discharged along with the airflow, so as to avoid affecting the air circulation due to the blockage of the dust screen 203a-1.

[0058] In this embodiment, the dust screen 203a-1 can effectively intercept the dust entering the air inlet pipe 203, avoid adhering to the condenser 201 after entering the heat dissipation box 200, and affect the heat release rate of the condenser 201. When the dust screen 203a-1 intercepts too much dust and is blocked seriously, the wind area of the dust screen 203a-1 increases, the thrust generated by the airflow is greater than the tension of the first spring 203c at this time, the dust screen 203a-1 in the sliding ring 203a sinks, when the sliding ring 203a leaves the sliding groove 203a-2, the tension of the second spring 203a-4 will pop out the slanted sliding block 203a-3, the slanted sliding block 203a-3 knocks the vibrating piece 203a-5, the dust screen 203a-1 in the sliding ring 203a vibrates, the dust adhering to the surface is loosened and discharged along with the airflow, so as to avoid affecting the air circulation due to the blockage of the dust screen 203a-1.

[0059] The remaining structures are the same as those of Embodiment 2.

[0060] Embodiment 4

[0061] The difference between this embodiment and the above embodiments is that two device line layout methods are provided for different scenes during actual ice melting implementation, scheme one is as shown in Figure 10 , and scheme two is as shown in Figure 11 .

[0062] Scheme one

[0063] Line switch configuration:

[0064] Switch 1. Boundary switch, primary and secondary fuse breaker with isolation function

[0065] Switch 2. Ice melting switch, 10kV breaker

[0066] Switch 3. Ice melting distribution transformer protection switch, original distribution transformer isolation switch + fuse

[0067] Switch 4. Short circuit switch, motor load switch with remote controller

[0068] Control logic:

[0069] 1. Ice melting process:

[0070] Switch K1 is disconnected --- transformer low voltage distribution side is disconnected / ice melting winding tap changer is adjusted to the required voltage position, from distribution transformer state to ice melting transformer state --- switch K4 short circuit switch is closed --- switch K2 is closed --- start ice melting

[0071] 2. Restore distribution transformer process:

[0072] Switch K2 is disconnected --- switch K4 is disconnected --- transformer low voltage distribution switch is closed --- switch K1 is closed --- restore line power supply and distribution transformer operation.

[0073] Scheme two

[0074] This scheme is compared with scheme one, and distribution switch 5 low voltage breaker is added, but K2 is replaced by disconnecting switch, and the control logic is similar to scheme one, when converting to ice melting, K5 is closed before K2 is closed; when converting to distribution state, K5 is disconnected after K2 is disconnected.

[0075] Application scenario

[0076] Scheme one, suitable for newly built large capacity transformer area.

[0077] Scheme two, suitable for existing transformer area to add ice melting function transformation, and newly built small capacity transformer area below 400kVA.

[0078] The rest of the structure is the same as example 3.

[0079] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Thus, the foregoing description is by way of example only, and is not intended to be limiting. The application is limited only as defined in the following claims and equivalents thereto. The sequence of any process or method steps, or the order in which they are carried out, can be altered or re-ordered without departing from the scope of the application. Any "articles of manufacture" or "manufacturing" as described herein are intended to encompass structures constructed of a multitude of different physical elements or components. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and also cover structures yet to be invented which perform the recited function but operate in a different manner. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims.

[0080] Also, to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (that is, not all implementations can include all of the features described or optional implementations can include only a subset of the features described).

[0081] It should be appreciated that in the development of any actual implementation, numerous implementation-specific decisions can be made. These implementation-specific decisions can include specific

[0082] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A multifunction distribution transformer for distribution line ice-melting, characterized in that: Including three-phase transformer body (A), the left side of three-phase transformer body (A) is provided with cooling mechanism (B), which is used for heat dissipation of three-phase transformer body (A); Cooling mechanism (B) includes oil pillow (100), the bottom of oil pillow (100) is connected with mounting bracket (101), the bottom of mounting bracket (101) is connected with mounting block (102), mounting block (102) is connected with the top of three-phase transformer body (A) through bolt, the inner wall of oil pillow (100) is connected with partition (108); The lower portion of the partition (108) is provided with a through hole (108a), and the oil liquid passes through the through hole (108a) at a faster flow rate by setting the through hole (108a) with a smaller aperture, the front position of the oil pillow (100) is provided with an oil filter pipe (106), and the oil filter pipe (106) is connected with the through hole (108a) at the corresponding position. The inner wall of the oil filter pipe (106) is connected with a filter screen (106a), the filter screen (106a) is spherical convex, the inner wall of the oil filter pipe (106) is connected with a baffle ring (106d) at the position of the front of the filter screen (106a). The surface of the oil filter pipe (106) is provided with an arc-shaped scraper (106c), the inside of the oil filter pipe (106) is rotatably connected with an impeller (106b), and the impeller (106b) is connected with the arc-shaped scraper (106c) through a rotating shaft. The bottom of the oil pillow (100) is provided with a heat dissipation box (200), the two sides of the heat dissipation box (200) are connected with mounting plates (202), the mounting plates (202) are connected with the three-phase transformer body (A) through bolts, the inside of the heat dissipation box (200) is provided with a condenser (201), the oil pillow (100) is communicated with the inside of the three-phase transformer body (A) through an oil injection pipe (300), the condenser (201) is connected with the oil pillow (100) through an oil inlet pipe (400), the condenser (201) is communicated with the inside of the three-phase transformer body (A) through an oil extraction pipe (500), the bottom of the inner wall of the oil pillow (100) is connected with an oil pump (107) at the position of the oil injection pipe (300), and the oil outlet end of the oil pump (107) is connected with the oil injection pipe (300).

2. The multi-functional distribution transformer for distribution line de-icing according to claim 1, characterized in that: The bottom of the oil pillow (100) is rotatably connected with a rotating rod (109a), the rotating rod (109a) is distributed at one side of the partition (108), the rotating rod (109a) is staggered with the through hole (108a), the top of the rotating rod (109a) is connected with a rotating plate (109b), the bottom of the rotating plate (109b) is connected with a fan blade (109), the top of the heat dissipation box (200) is connected with an air inlet pipe (203) at the position corresponding to the fan blade (109), and the rotating connection between the oil pillow (100) and the rotating rod (109a) is provided with a shaft seal.

3. The multi-functional distribution transformer for distribution line de-icing according to claim 2, wherein: The top of the oil pillow (100) is connected with a pressure relief pipe (105) above the oil pump (107), and the inner wall of the pressure relief pipe (105) is slidably connected with a piston pipe (105a).

4. The multi-functional distribution transformer for distribution line de-icing according to claim 3, wherein: The top of the inner wall of the piston pipe (105a) is connected with a supporting ring (105d), the position below the supporting ring (105d) of the inner wall of the piston pipe (105a) is connected with a sealing ring (105b), the upper side of the sealing ring (105b) is connected with a sealing plug (105c), the sealing plug (105c) and the supporting ring (105d) are connected with a third spring (105e), and the top of the sealing plug (105c) is connected with a protective cover (105f).

5. The multi-functional distribution transformer for distribution line de-icing according to claim 4, wherein: The inner wall of the air inlet pipe (203) is connected with a sliding ring (203a), and the inner wall of the sliding ring (203a) is connected with a dust screen (203a-1).

6. The multi-functional distribution transformer for distribution line de-icing according to claim 5, wherein: The position below the sliding ring (203a) of the inner wall of the air inlet pipe (203) is connected with a connecting ring (203b), the position between the connecting ring (203b) and the sliding ring (203a) is connected with a first spring (203c), the positions on both sides of the air inlet pipe (203) are respectively provided with a sliding groove (203a-2), the inner wall of the sliding groove (203a-2) is connected with an inclined sliding block (203a-3), the position between the inclined sliding block (203a-3) and the inner wall of the sliding groove (203a-2) is connected with a second spring (203a-4), and the top of the sliding ring (203a) is connected with a vibration piece (203a-5) corresponding to the position of the inclined sliding block (203a-3).

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