CN216562670U - Transformer - Google Patents

Abstract

The present invention provides a transformer, comprising: the oil tank comprises a tank body and a tank cover arranged above the tank body in a covering mode, wherein the tank body comprises a bottom plate and a plurality of side plates which are sequentially connected around the periphery of the bottom plate; the transformer oil is filled in the oil tank, and the liquid level of the transformer oil and the tank cover are arranged at intervals to form an air gap; the heat sink assembly is arranged on the side plate; each cooling fin component comprises at least two connecting pipes which are parallel to each other and are arranged at intervals along the direction vertical to the supporting base plane of the transformer and a plurality of cooling fins which are arranged at intervals along the direction vertical to the plate surface of the side plate, and each connecting pipe is connected with the plurality of cooling fins. The transformer solves the problem that the transformer structure in the prior art is not beneficial to being installed in a container with a certain size.

Description

Transformer

Technical Field

The utility model relates to the technical field of transformers, in particular to a transformer.

Background

In recent years, various domestic large power transmission and transformation complete manufacturing enterprises are directing attention to overseas markets, and large-capacity modular power transmission and transformation station complete equipment and full-package business gradually start to enter international markets by means of deep technical strength accumulated in the power transmission and transformation industry in China.

In a traditional megawatt-level transformer station, transformers matched with SVG module units are all traditional power transformer monomers, and schemes and appearance structures of various manufacturers are complex and diverse and cannot be unified. Often need extra secondary wood packing or iron packing of carrying on when overseas ship transport to need spraying mark, freight transportation serial number etc. the process is loaded down with trivial details, also increased manufacturer's production delivery pressure to a certain extent along with the extension that the declaration spent time.

Moreover, in order to keep the oil level inside the transformer at a standard height capable of normally operating, the conventional power transformer needs to be additionally provided with a cylindrical oil conservator, so that the overall height of the power transformer is increased by more than one meter on the basis of the height of the original oil tank and the height of the transformer body, and the whole transformer is very not beneficial to the control of the actual packaging cost and the limitation of international marine transport conditions.

Because the cabinet body of traditional cylinder formula oil conservator adopts hot rolled steel board and cabinet foot channel-section steel mode to combine together to fix basically, can take place inertial impact because of the rocking and jolting of wave in the transformer oil in the oil conservator cabinet body when sea transport, the oil conservator cabinet body easily produces inertial tear and oil leak under this condition, this has threatened the quality safety of product seriously.

Under the conditions, transformer products arriving at a construction site through long-distance marine transportation basically need to be dispatched to an after-sale team to carry materials and tools for field remediation before actual investment and operation, so that the secondary investment travel and manufacturing cost are increased, the quality of the remedied products is difficult to guarantee due to different geographical environments and working conditions of an application field, and the image and subsequent development of manufacturers in a target market are extremely unfavorable.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a transformer, which solves the problem that the structure of the transformer in the prior art is not favorable for being installed in a container with a certain size.

In order to achieve the above object, according to one aspect of the present invention, there is provided a transformer including: the oil tank comprises a tank body and a tank cover arranged above the tank body in a covering mode, wherein the tank body comprises a bottom plate and a plurality of side plates which are sequentially connected around the periphery of the bottom plate; the transformer oil is filled in the oil tank, and the liquid level of the transformer oil and the tank cover are arranged at intervals to form an air gap; the heat sink assembly is arranged on the side plate; each cooling fin component comprises at least two connecting pipes which are parallel to each other and are arranged at intervals along the direction vertical to the supporting base plane of the transformer and a plurality of cooling fins which are arranged at intervals along the direction vertical to the plate surface of the side plate, and each connecting pipe is connected with the plurality of cooling fins.

Furthermore, each heat dissipation sheet is internally provided with an accommodating cavity communicated with the inside of the corresponding connecting pipe so as to accommodate transformer oil; and/or the distance L1 between two adjacent fins in each fin assembly is 40mm to 45 mm.

Further, the number of the heat sink assemblies is plural, and the plural heat sink assemblies are arranged at intervals in a direction parallel to the support base surface of the transformer.

Further, the distance L2 between two adjacent heat sink assemblies is 30mm to 50 mm; and/or the oil tank is cuboid, the number of the side plates is four, and the three side plates are provided with the radiating fin assemblies.

Further, the number of the connecting pipes in the heat sink assembly is two, and the two connecting pipes are arranged at intervals in a direction perpendicular to the supporting base plane of the transformer.

Furthermore, through holes for communicating with the inside of the connecting pipe are arranged on the oil tank, and the center distance L3 between every two adjacent through holes is 550-570 mm along the direction parallel to the supporting base plane of the transformer; the center-to-center distance L4 between two adjacent through holes is 800mm to 1200mm in the direction perpendicular to the supporting base surface of the transformer.

Further, the oil tank is in a rectangular parallelepiped shape, and the number of the fins in each fin assembly on the side plate parallel to the width direction of the oil tank is 15; in each fin assembly on the side plate parallel to the length direction of the fuel tank, the number of fins in the fin assembly is 14.

Further, each of the fin assemblies includes a plurality of reinforcing bars arranged in parallel to the connection pipe and spaced around the arrangement direction of the plurality of fins, and each of the reinforcing bars is connected to each of the plurality of fins to reinforce the strength of the fin assembly.

Further, the distance between the liquid level of the transformer oil and the tank cover is 190mm to 300 mm.

Further, the transformer further comprises: the high-voltage bushing is arranged on the side plate; and the low-voltage sleeve is arranged on the side plate.

Furthermore, the transformer also comprises a low-voltage outlet box, a low-voltage bushing is arranged on the side plate through the low-voltage outlet box, and the low-voltage bushing is positioned on one side of the low-voltage outlet box far away from the side plate; and/or the high-voltage bushing and the low-voltage bushing are positioned on the same side plate; and/or the high-voltage bushing and the low-voltage bushing are silica gel integrated elbow-type head bushings; and/or the high voltage bushing is positioned on the side of the low voltage bushing remote from the supporting base plane of the transformer.

Further, be provided with on the curb plate of box: the pressure relief valve is used for opening and relieving pressure when the pressure in the transformer is overhigh; and/or a pressure gauge for measuring the level of pressure inside the tank; and/or an oil level gauge for measuring the level of the transformer oil in the oil tank; and/or a drain valve for draining oil in the event of a malfunction or filtering oil in the event of normal operation; and/or the oil filling hole is used for filling oil on site or filtering oil during normal work; and/or an oil sample valve for taking out an oil sample inside the oil tank for testing.

By applying the technical scheme of the utility model, the transformer comprises: the oil tank comprises a tank body and a tank cover arranged above the tank body in a covering mode, wherein the tank body comprises a bottom plate and a plurality of side plates which are sequentially connected around the periphery of the bottom plate; the transformer oil is filled in the oil tank, and the liquid level of the transformer oil and the tank cover are arranged at intervals to form an air gap; the heat sink assembly is arranged on the side plate; each cooling fin component comprises at least two connecting pipes which are parallel to each other and are arranged at intervals along the direction vertical to the supporting base plane of the transformer and a plurality of cooling fins which are arranged at intervals along the direction vertical to the plate surface of the side plate, and each connecting pipe is connected with the plurality of cooling fins. Therefore, the utility model specially sets the integral appearance and the radiating fin structure of the transformer aiming at the inner limit size of a container in international maritime transport, and replaces the oil conservator structure of a large-capacity transformer in the prior art by the measures of setting the highest oil level and the lowest oil level inside an oil tank to form an air gap and setting the radiating fin component, thereby reducing the integral height of the transformer, realizing the installation of the transformer in a limited space and solving the problem that the transformer structure in the prior art is not beneficial to being installed in the container with a certain size.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a transformer according to the present invention;

fig. 2 shows a half sectional view of the transformer shown in fig. 1 in one direction;

FIG. 3 shows a half-sectional view of the transformer shown in FIG. 1 in another orientation; and

fig. 4 shows a schematic structural view of a container for housing the transformer shown in fig. 1.

Wherein the figures include the following reference numerals:

100. a transformer; 200. a container;

1. an oil tank; 101. a box cover; 102. a box body; 1021. a base plate; 1022. a side plate; 1023. reinforcing ribs; 1024. an installation part; 2. a heat sink assembly; 201. a connecting pipe; 202. a heat sink; 203. a reinforcing bar; 3. transformer oil; 4. a hoisting structure; 5. a low-pressure bushing; 6. a high voltage bushing; 7. an oil level gauge; 8. a pressure gauge; 9. an oil drain valve; 10. an oil filler hole; 11. a pressure relief valve; 12. an oil sample valve; 13. an iron core; 14. a low-voltage coil; 15. a high-voltage coil; 16. a lead wire; 17. an air gap; 18. a low-voltage outlet box; 19. and (4) an air relief plug.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 3, the present invention provides a transformer 100 including: the fuel tank 1 comprises a tank body 102 and a tank cover 101 arranged above the tank body 102 in a covering mode, wherein the tank body 102 comprises a bottom plate 1021 and a plurality of side plates 1022 sequentially connected around the periphery of the bottom plate 1021; the transformer oil 3 is filled in the oil tank 1, and the liquid level of the transformer oil 3 and the tank cover 101 are arranged at intervals to form an air gap 17; a fin assembly 2 provided on the side plate 1022; each of the heat sink assemblies 2 includes at least two connection pipes 201 parallel to each other and arranged at intervals in a direction perpendicular to a support base surface of the transformer, and a plurality of heat sinks 202 arranged at intervals in a direction perpendicular to a plate surface of the side plate 1022, and each of the connection pipes 201 is connected to each of the plurality of heat sinks 202.

The transformer 100 of the present invention includes: the fuel tank 1 comprises a tank body 102 and a tank cover 101 arranged above the tank body 102 in a covering mode, wherein the tank body 102 comprises a bottom plate 1021 and a plurality of side plates 1022 sequentially connected around the periphery of the bottom plate 1021; the transformer oil 3 is filled in the oil tank 1, and the liquid level of the transformer oil 3 and the tank cover 101 are arranged at intervals to form an air gap 17; a fin assembly 2 provided on the side plate 1022; each of the heat sink assemblies 2 includes at least two connection pipes 201 parallel to each other and arranged at intervals in a direction perpendicular to a support base surface of the transformer, and a plurality of heat sinks 202 arranged at intervals in a direction perpendicular to a plate surface of the side plate 1022, and each of the connection pipes 201 is connected to each of the plurality of heat sinks 202. Thus, the utility model specially sets the integral appearance and the radiating fin structure of the transformer aiming at the inner limit size of a 40-foot container in international maritime transport, replaces the oil conservator structure of a large-capacity transformer in the prior art by the measures of setting the highest oil level and the lowest oil level in the oil tank to form the air gap 17 and setting the radiating fin component 2, reduces the integral height of the transformer, realizes the installation of the transformer in a limited space, and solves the problem that the transformer structure in the prior art is not beneficial to being installed in the container with a certain size.

The tank cover 101 is a metal cover plate that protects the inside of the transformer and is a component of the container for the transformer oil 3; the tank 102 is a rectangular parallelepiped metal casing which protects the inside of the transformer and is a component of a container for the transformer oil 3; the bottom plate 1021 is a metal bottom plate that protects the inside of the transformer and is a component of a container for transformer oil; the side plate 1022 refers to a metal side plate that protects the inside of the transformer and is a constituent of a container for transformer oil; the transformer oil 3 is an oily medium which is arranged in the transformer and used for insulating and radiating; the air gap 17 is an air gap between the liquid level of the transformer oil 3 and the tank cover 101, and provides an adjustment margin for adjusting the dynamic pressure of the transformer oil 3 during expansion or contraction; the heat sink 202 is a metal sheet structure for increasing a contact area between the transformer oil and air, and each heat sink 202 is connected to the inside of the case 102 through a hollow connection pipe 201.

According to the national standard, a general large-capacity transformer needs to be provided with a conservator to regulate the oil level inside an oil tank 1 when the transformer runs, but the oil conservator of the 35 kV-class transformer is often close to 1 meter in height, if the oil conservator is additionally arranged outside the oil tank, the whole height of the transformer exceeds the height limit inside a container, therefore, the transformer of the utility model is optimized aiming at the oil tank of the transformer in the prior art, the height of a side plate 1022 of the oil tank 1 can be properly increased under the condition of keeping the oil level inside the transformer unchanged by removing the elements such as the oil conservator, tank feet, connecting pipes, a gas relay and the like of the transformer, so that an air gap 17 is formed between a tank cover 101 and the liquid level of transformer oil 3, the air layer is compressed or expanded by utilizing the phenomenon that the oil level is increased or reduced by the temperature change of the transformer when the transformer runs, and the compression and expansion effects of the gas in a closed space of the air gap 17 are utilized to replace the oil storage in the prior art The oil level of the oil tank is adjusted, so that the use amount of the transformer oil is greatly reduced. Meanwhile, the height of the side plates 1022 is certainly not higher than the height of the oil conservator which needs to be increased, so that the overall height of the transformer is effectively reduced, and the size requirement of the transformer when the height of the transformer is limited by the height of the interior of the container is met.

Specifically, each of the heat radiating fins 202 has a receiving cavity therein communicating with the inside of the corresponding connecting pipe 201 for receiving the transformer oil 3.

As shown in fig. 3, the distance L1 between two adjacent fins 202 in each fin block 2 is 40mm to 45 mm.

As shown in fig. 3, the number of the fin members 2 is plural, and the plural fin members 2 are arranged at intervals in a direction parallel to the support base surface of the transformer; wherein, the distance L2 between two adjacent radiating fin assemblies 2 is 30mm to 50 mm.

As shown in fig. 3, the number of the connection pipes 201 in the fin assembly 2 is two, and the two connection pipes 201 are arranged at intervals in a direction perpendicular to the support base surface of the transformer.

Specifically, the oil tank 1 is provided with a through hole for communicating with the inside of the connection pipe 201; preferably, the center-to-center distance L3 between two adjacent through holes on the same side plate 1022 is 550mm to 570mm in a direction parallel to the support base plane of the transformer; the center-to-center distance L4 between two adjacent through holes on the same side plate 1022 is 800mm to 1200mm in the direction perpendicular to the supporting base surface of the transformer.

Preferably, the oil tank 1 is in a rectangular parallelepiped shape, the bottom plate 1021 is a rectangular plate body, the number of the side plates 1022 is four, and the heat sink assemblies 2 are disposed on three of the side plates 1022. The four side plates 1022 include two first side plates which are spaced and oppositely arranged along the length direction of the oil tank 1 and two second side plates which are spaced and oppositely arranged along the width direction of the oil tank 1, wherein a plurality of cooling fin assemblies 2 are arranged on one second side plate and the two first side plates which are positioned on the two opposite sides of the second side plate; among them, in each of the fin assemblies 2 on the side plate 1022 (i.e., the first side plate) parallel to the width direction of the oil tank 1, the number of the fins 202 is 15; in each of the fin assemblies 2 on the side plate 1022 (i.e., the second side plate) parallel to the lengthwise direction of the fuel tank 1, the number of the fins 202 in the fin assembly 2 is 14.

Further preferably, four fin assemblies 2 are disposed on one second side plate, and two fin assemblies 2 are disposed on each of the two first side plates.

It should be noted that different actual environment temperatures at different work sites may give different requirements to the upper limit value and the lower limit value of the temperature rise of the transformer with the same capacity, which may affect the height and the number of the heat sink assemblies and the number of the heat sinks in each heat sink assembly, thereby indirectly affecting the length, width, and height dimensions of the whole transformer, and specifically, the heat dissipation area of each heat sink needs to be cumulatively calculated according to the requirements of users, the temperature rise limit, and the height limit of the air gap 17 inside the oil tank 1, so as to determine the number of the used heat sink assemblies and the number of the heat sinks 202 in each heat sink assembly.

As shown in fig. 1 to 3, each fin assembly 2 includes a plurality of reinforcing bars 203 arranged in parallel to the connection pipe 201 and spaced around the arrangement direction of the plurality of fins 202 (i.e., spaced around the extending direction of the corresponding connection pipe 201), and each reinforcing bar 203 is connected to each of the plurality of fins 202 to reinforce the strength of the fin assembly 2.

Preferably, the distance between the liquid level of the transformer oil 3 and the tank cover 101 is 190mm to 300 mm.

As shown in fig. 1 and 2, the transformer further includes: a high voltage bushing 6 disposed on the side plate 1022; and a low-pressure bushing 5 disposed on the side plate 1022. The high-voltage bushing 6 is a connection hub for connecting a high-voltage winding inside the transformer with an external power supply device, and the low-voltage bushing 5 is a connection hub for connecting a low-voltage winding inside the transformer with an external power-consumption SVG.

As shown in fig. 1 to 3, the transformer further includes a low voltage outlet box 18, the low voltage bushing 5 is mounted on the side plate 1022 through the low voltage outlet box 18, the low voltage bushing 5 is located on a side of the low voltage outlet box 18 away from the side plate 1022, and a hand hole is disposed above the low voltage outlet box 18, which is more beneficial to practical production operation from an ergonomic point of view.

Preferably, the high voltage bushing 6 and the low voltage bushing 5 are located on the same side plate 1022 on which the heat sink assembly 2 is not located, and after the arrangement of the transformer body structure is completed, in order to lead the connection wires of the high voltage bushing 6 and the low voltage bushing 5 out of the same side plate 1022, both the high voltage lead wire and the low voltage lead wire need to be led out of the same side plate 1022.

The high-voltage bushing 6 and the low-voltage bushing 5 are silica gel integrated elbow-shaped head bushings, so that the size perpendicular to the plate surface direction of the side plate 1022 is reduced, the full-insulation sealing performance can be better ensured, and the risks of electric leakage to the surrounding environment and accidents caused by artificial touch are greatly reduced. Moreover, the silica gel integrated elbow-shaped head sleeve is also beneficial to the connection of the high-voltage sleeve 6 and the low-voltage sleeve 5 with the high-voltage wire inlet and outlet plug head and the low-voltage wire inlet and outlet plug head respectively, the high-voltage wire inlet and outlet plug head and the low-voltage wire inlet and outlet plug head are designed by adopting 90-degree bent angles, the connected cable also has flexibility, the space in the length direction of the container can be better utilized, and the size in the width direction of the container can be reduced as much as possible.

Preferably, the high-voltage bushing 6 is located on the side of the low-voltage bushing 5 remote from the supporting base of the transformer, further facilitating the homodromous lead-in and lead-out arrangement of the cables of the high-and low-voltage elbow-type heads connected to the high-voltage bushing 6 and the low-voltage bushing 5, respectively, to avoid their spatial interference.

Thus, according to the space limitation condition in the container, the traditional top arrangement of the low-voltage sleeve 5 and the high-voltage sleeve 6 is changed into the side arrangement, and the traditional pure porcelain sleeve or epoxy resin sleeve is changed into the silica gel integrated elbow-shaped head sleeve, so that the phenomenon of safety accidents caused by mistaken touch in a limited space can be avoided, and the routing arrangement of the cable connected with the SVG component in the container 200 by the transformer 100 is facilitated.

As shown in fig. 1, the side plate 1022 of the case 102 is provided with: the pressure relief valve 11 is used for opening and relieving pressure when the pressure inside the transformer is too high; and/or a pressure gauge 8 for measuring the level of pressure inside the tank 1; and/or an oil level gauge 7 for measuring the height of the oil level of the transformer oil 3 in the oil tank 1, wherein the oil level gauge 7 is provided with a protection mechanism such as alarm tripping and the like; and/or a bleed valve 9 for bleeding oil in the event of a malfunction or filtering oil in the event of normal operation; and/or the oil filling hole 10 is arranged on the box cover 101 and is used for filling oil on site or filtering oil during normal operation; and/or an oil sample valve 12 for taking out an oil sample inside the oil tank 1 for testing.

In order to ensure the safety performance of the whole transformer during operation, protection control elements such as an oil level gauge 7, a gas release plug 19 and an oil release valve 9 on the oil conservator in the prior art and the high-voltage bushing 6 and the low-voltage bushing 5 are arranged on the same side plate 1022 of the box body 102, and form a protection unit of the transformer together with a pressure release valve 11, a pressure gauge 8 and the like, so that the protection unit is convenient to observe and operate on site.

As shown in fig. 2, an iron core 13 is provided inside the oil tank 1, and the iron core 13 is a basic internal structure of a magnetic circuit for supporting the low-voltage coil 14 and the high-voltage coil 15 and providing electromagnetic induction of the transformer; the low-voltage coil 14 is sleeved outside the iron core 13 to provide a low-voltage electric loop of electromagnetic induction of the transformer, and the low-voltage coil 14 is connected with the low-voltage sleeve 5 outside the transformer through a low-voltage lead in the leads 16; and the high-voltage coil 15 is sleeved outside the low-voltage coil 14 to provide a high-voltage electric loop of electromagnetic induction of the transformer, and the high-voltage coil 15 is connected with the high-voltage bushing 6 outside the transformer through a high-voltage lead in the leads 16.

As shown in fig. 1 to 3, the side plate 1022 is provided with a reinforcing rib 1023, and the reinforcing rib 1023 is a metal structure welded to the side plate 1022 to increase the strength of the protection oil tank 1 so as not to be deformed by thermal expansion of the transformer oil 3 or the like.

Specifically, the oil tank 1 is in a rectangular parallelepiped shape, the bottom plate 1021 is a rectangular plate body, the number of the side plates 1022 is four, and the four side plates 1022 include two first side plates which are spaced and oppositely arranged along the length direction of the oil tank 1 and two second side plates which are spaced and oppositely arranged along the width direction of the oil tank 1; two reinforcing ribs 1023 are arranged on one second side plate at intervals, three reinforcing ribs 1023 are arranged on the other second side plate at intervals, and the distance L5 between two adjacent reinforcing ribs 1023 in the three reinforcing ribs 1023 arranged at intervals is 650 mm; the two first side plates are respectively provided with a reinforcing rib 1023; wherein, the extending direction of each reinforcing rib 1023 is perpendicular to the supporting base plane of the transformer.

As shown in fig. 1, the tank 102 is provided with a plurality of hoisting structures 4, which are metal plates welded to the side plates 1022 for receiving force when hoisting the entire transformer, and the plurality of hoisting structures 4 are arranged at intervals around the circumferential side of the tank 102.

Preferably, the number of the lifting structures 4 is four, and four lifting structures 4 are arranged on two opposite side plates 1022 of the box body 102 in pairs.

As shown in fig. 1 to 3, a mounting portion 1024 is disposed at the bottom of the container body 102, the mounting portion 1024 is a channel steel protruding from the bottom plate 1021 of the container body 102 toward the side surface of the container body 102 and welded below the bottom plate 1021 of the container body 102, a through hole for a fastener to pass through is disposed on the channel steel, a fastening hole for a fastener to insert into is disposed on the bottom plate of the container, and one end of the fastener passes through the corresponding through hole and is then screwed into the corresponding fastening hole, so as to fixedly connect the bottom plate 1021 of the container body 102 and the bottom plate of the container.

In one embodiment of the transformer, according to the SVG module in the modular power station and in combination with relevant market information, the initial setting conditions are as follows:

(1) the method is characterized in that a 35kV bus is selected, a-7- +7Mvar dynamic reactive power compensation unit is provided, the high-voltage grade of a module transformer is set to be 35kV +/-2 x 2.5%/10.5 kV, and Yd11 type products are designed, and no-load loss, impedance and no-load current of the module transformer are designed according to national standard positive deviation.

(2) And the environmental temperature of the transformer during operation is checked according to the annual maximum environmental temperature plus 40 ℃, the annual minimum environmental temperature minus 40 ℃ and the annual average environmental temperature plus 20 ℃.

(3) The average temperature rise of the liquid surface of the transformer oil 3 is less than or equal to 55K, the highest temperature rise of the high-voltage coil 15 is less than or equal to 65K, and the highest temperature rise of the low-voltage coil 14 is less than or equal to 65K.

(4) The 4 heat sink assemblies 2 including 15 heat sinks 202 of the models PC1500-520 and the 4 heat sink assemblies 2 including 14 heat sinks 202 of the models PC1500-520 were selected to dissipate heat of the transformer as a whole.

(5) And the above numerical values are calculated and verified to reach the standard.

The length, width and height of the actual three-dimensional modeling of the transformer of the embodiment are 3982mm, 2035mm, 2422mm, the transformer is placed in the container, the length direction of the transformer is parallel to the length direction of the national standard shipping container of the 40 feet standard, and the width dimension and the height dimension of the transformer both meet the requirement of the interior of the container.

The above described construction of the transformer of the present invention is an innovative design based on the dimensions of the 40 feet standard international shipping container shown in fig. 4 (inner length 12032mm inner width 2352mm inner height 2698 mm; outer length 12192mm outer width 2438mm outer height 2896mm), which can be perfectly placed into a 40 feet standard international shipping container for shipping.

Because the dimensions of the international shipping container in the width direction and the height direction are the same, the transformer and the improved scheme thereof can be suitable for all modular power stations of standard containers needing the transformer.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the transformer 100 of the present invention includes: the fuel tank 1 comprises a tank body 102 and a tank cover 101 arranged above the tank body 102 in a covering mode, wherein the tank body 102 comprises a bottom plate 1021 and a plurality of side plates 1022 sequentially connected around the periphery of the bottom plate 1021; the transformer oil 3 is filled in the oil tank 1, and the liquid level of the transformer oil 3 and the tank cover 101 are arranged at intervals to form an air gap 17; a fin assembly 2 provided on the side plate 1022; each of the heat sink assemblies 2 includes at least two connection pipes 201 parallel to each other and arranged at intervals in a direction perpendicular to a support base surface of the transformer, and a plurality of heat sinks 202 arranged at intervals in a direction perpendicular to a plate surface of the side plate 1022, and each of the connection pipes 201 is connected to each of the plurality of heat sinks 202. Thus, the utility model specially sets the integral appearance and the radiating fin structure of the transformer aiming at the inner limit size of a 40-foot container in international maritime transport, and replaces the oil conservator structure of a large-capacity transformer in the prior art by the measures of setting the highest oil level and the lowest oil level inside the oil tank to form the air gap 17 and setting the radiating fin component 2, thereby reducing the integral height of the transformer, realizing the installation of the transformer in a limited space and solving the problem that the transformer structure in the prior art is not beneficial to being installed in the container with a certain size.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A transformer, comprising:

the oil tank (1) comprises a tank body (102) and a tank cover (101) arranged above the tank body (102) in a covering mode, wherein the tank body (102) comprises a bottom plate (1021) and a plurality of side plates (1022) which are sequentially connected around the periphery of the bottom plate (1021);

the transformer oil (3) is filled in the oil tank (1), and an air gap (17) is formed between the liquid level of the transformer oil (3) and the tank cover (101) at intervals;

a heat sink assembly (2) disposed on the side plate (1022); each heat sink assembly (2) comprises at least two connecting pipes (201) which are parallel to each other and are arranged at intervals along a direction vertical to a supporting base surface of the transformer, and a plurality of heat sinks (202) which are arranged at intervals along a direction vertical to the plate surfaces of the side plates (1022), wherein each connecting pipe (201) is connected with a plurality of heat sinks (202).

2. The transformer of claim 1,

each cooling fin (202) is internally provided with an accommodating cavity communicated with the inside of the corresponding connecting pipe (201) so as to accommodate the transformer oil (3); and/or

The distance L1 between two adjacent radiating fins (202) in each radiating fin assembly (2) is 40mm to 45 mm.

3. Transformer according to claim 1, characterized in that the number of heat sink assemblies (2) is multiple, a plurality of heat sink assemblies (2) being arranged at intervals in a direction parallel to the supporting base plane of the transformer.

4. The transformer of claim 3,

the distance L2 between two adjacent heat sink assemblies (2) is 30mm to 50 mm; and/or

The oil tank (1) is cuboid, the quantity of curb plate (1022) is four, wherein three all be provided with on curb plate (1022) fin subassembly (2).

5. The transformer according to claim 1, characterized in that the number of the connection tubes (201) in the fin assembly (2) is two, and the two connection tubes (201) are arranged at intervals in a direction perpendicular to a supporting base plane of the transformer.

6. The transformer according to claim 2, characterized in that each of the fin assemblies (2) includes a plurality of reinforcing bars (203) arranged in parallel to the connection pipe (201) and spaced around an arrangement direction of the plurality of fins (202), and each of the reinforcing bars (203) is connected to each of the plurality of fins (202) to reinforce the strength of the fin assembly (2).

7. The transformer according to claim 2, characterized in that the distance between the liquid level of the transformer oil (3) and the tank cover (101) is 190mm to 300 mm.

8. The transformer of claim 1, further comprising:

a high voltage bushing (6) arranged on the side plate (1022);

a low pressure bushing (5) disposed on the side plate (1022).

9. The transformer of claim 8,

the transformer further comprises a low-voltage outlet box (18), the low-voltage bushing (5) is mounted on the side plate (1022) through the low-voltage outlet box (18), and the low-voltage bushing (5) is located on one side, far away from the side plate (1022), of the low-voltage outlet box (18); and/or

The high-voltage bushing (6) and the low-voltage bushing (5) are located on the same side plate (1022); and/or

The high-voltage bushing (6) and the low-voltage bushing (5) are silica gel integrated elbow-type head bushings; and/or

The high-voltage bushing (6) is positioned on one side of the low-voltage bushing (5) far away from the supporting base surface of the transformer.

10. The transformer according to claim 1, characterized in that the side plates (1022) of the tank (102) are provided with:

the pressure relief valve (11) is used for opening and relieving pressure when the pressure in the transformer is too high; and/or

A pressure gauge (8) for measuring the level of pressure inside the tank (1); and/or

An oil level gauge (7) for measuring the level of the oil level of the transformer oil (3) in the oil tank (1); and/or

The oil drain valve (9) is used for draining oil when a fault occurs or filtering oil when the fault occurs normally; and/or

The oil filling hole (10) is used for filling oil on site or filtering oil during normal operation; and/or

An oil sample valve (12) for taking out the oil sample inside the oil tank (1) for testing.

Images