CN117275889B - Transformer heat abstractor and oil immersed transformer - Google Patents
Transformer heat abstractor and oil immersed transformer Download PDFInfo
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- CN117275889B CN117275889B CN202311407925.3A CN202311407925A CN117275889B CN 117275889 B CN117275889 B CN 117275889B CN 202311407925 A CN202311407925 A CN 202311407925A CN 117275889 B CN117275889 B CN 117275889B
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- 230000017525 heat dissipation Effects 0.000 claims abstract description 133
- 238000003466 welding Methods 0.000 claims abstract description 31
- 238000004891 communication Methods 0.000 claims description 40
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000006978 adaptation Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004080 punching Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
The invention belongs to the technical field of transformers, and particularly provides a transformer heat dissipation device and an oil immersed transformer. The heat dissipation assembly is formed by arranging a plurality of first oil collecting boxes, a plurality of second oil collecting boxes and a plurality of heat dissipation units along a first horizontal direction. The heat dissipation unit comprises a plurality of heat dissipation boxes, an oil duct is formed in each heat dissipation box, and the heat dissipation boxes are communicated through the first oil collecting box and the second oil collecting box. So set up, a plurality of radiating boxes simultaneous working can obtain great radiating area on the one hand to the heat dissipation demand of adaptation large-scale transformer. On the other hand, split the radiating unit into a plurality of heat dissipation boxes that the volume is less, and required steel sheet width is less during processing, and the roughness is higher after the steel sheet punching press, and it is neat to counterpoint more easily during the welding, is difficult for taking place the welding defect, helps improving product welding quality, saves the process of secondary maintenance, reduction in manufacturing cost.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a transformer heat dissipation device and an oil immersed transformer.
Background
When the oil immersed transformer operates, loss generated by internal windings, iron cores and other parts of the oil immersed transformer can be converted into heat, so that the temperature of the transformer and insulating oil is increased, the normal operation of the transformer can be influenced due to overhigh temperature, and the service lives of internal parts can be greatly shortened. In order to ensure the service life of the transformer, a corresponding heat dissipation device is required to be arranged on the transformer to cool the insulating oil, so that the transformer is prevented from being influenced by the temperature rise of the transformer to normal use and even burn the transformer.
The heat dissipating device mainly comprises two oil collecting pipes and a plurality of heat dissipating unit boxes arranged between the two oil collecting pipes along the axial direction of the oil collecting pipes, wherein the heat dissipating unit boxes are sheet-shaped and are usually obtained by butt welding two stamping-formed steel plates, an oil duct is formed in the heat dissipating unit boxes, and the oil duct is communicated with the oil collecting pipes. When the heat radiation unit box works, one oil collecting pipe is used as an oil inlet pipe, the other oil collecting pipe is used as an oil outlet pipe, and oil can enter the inner oil passage of the heat radiation unit box through one oil collecting pipe and then flow out from the other oil collecting pipe. The heat dissipation power of the heat dissipation device is positively related to the volume of the heat dissipation device, and the larger the volume is, the larger the heat dissipation area is, and the better the heat dissipation effect is. In general, in designing, it is necessary to consider the heat dissipation power of the heat dissipation device to be adapted to the transformer, and the large-sized transformer is also large in size.
When producing large-scale heat abstractor, the steel sheet for making radiating element box is also great, and the steel sheet is warp after punching press easily, and its planarization is relatively poor, and two steel sheets take place the skew easily when involuting the welding, have the risk of lack welding. When the heat radiation unit box is in lack welding, leakage can be found in the follow-up leakage test procedure, repair welding is needed to be carried out in a repair workshop, and the labor and material resources consumed by repair welding are increased additionally in production cost.
Disclosure of Invention
The invention provides a transformer heat dissipation device and an oil immersed transformer, and aims to solve the problems that a steel plate used for manufacturing a large-scale radiator in the existing design is large in area, poor in flatness after stamping and easy to leak due to lack of welding.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a transformer heat dissipation device, which comprises an oil inlet pipe, an oil outlet pipe and a heat dissipation assembly arranged between the oil inlet pipe and the oil outlet pipe, wherein the oil inlet pipe and the oil outlet pipe are respectively arranged along a first horizontal direction, the oil inlet pipe is positioned above the oil outlet pipe, one side, adjacent to the heat dissipation assembly, of the oil inlet pipe and the oil outlet pipe is respectively provided with a plurality of oil passing holes, and the oil passing holes are arranged at intervals along the first horizontal direction;
the heat dissipation assembly includes:
the plurality of first oil collecting boxes are arranged at intervals along the first horizontal direction and below the oil inlet pipe, a first oil collecting cavity is formed in the first oil collecting boxes in a hollow mode, a first communication port is formed in the top of each first oil collecting box, a second communication port is formed in the bottom of each first oil collecting box, and the first communication ports are communicated with the first oil collecting cavity and the oil passing holes in the oil inlet pipe;
the second oil collecting boxes are arranged at intervals along the first horizontal direction and are arranged above the oil outlet pipe, the second oil collecting boxes are in one-to-one correspondence with the first oil collecting boxes, second oil collecting cavities are formed in the second oil collecting boxes in a hollow mode, a third communication port is formed in the top of each second oil collecting box, a fourth communication port is formed in the bottom of each second oil collecting box, and the fourth communication ports are communicated with the second oil collecting cavities and the oil passing holes in the oil outlet pipe; and
the heat dissipation units are arranged between the first oil collecting boxes and the second oil collecting boxes at intervals along the first horizontal direction and correspond to the first oil collecting boxes one by one, the heat dissipation units comprise a plurality of heat dissipation boxes arranged at intervals along the second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, the heat dissipation boxes are provided with oil channels which are vertically communicated, the upper ends of the oil channels are communicated with the first oil collecting cavities through second communication openings, and the lower ends of the oil channels are communicated with the second oil collecting cavities through third communication openings.
In one possible implementation, the heat dissipating unit further includes a first support bar connected between the plurality of heat dissipating boxes distributed in the second horizontal direction.
In one possible implementation manner, the first supporting rods are vertically arranged, a first limiting groove is vertically formed in one side, adjacent to the heat dissipation box, of the first supporting rods, the side walls of the heat dissipation box are accommodated in the first limiting groove, and the side walls of the two adjacent first supporting rods are abutted against each other in the first horizontal direction.
In one possible implementation manner, the heat dissipation unit further includes a second support rod, the second support rod is disposed on the outer side of the heat dissipation box at the edge, the second support rod is disposed vertically, a second limit groove is vertically disposed on one side adjacent to the heat dissipation box, the side wall of the heat dissipation box is accommodated in the second limit groove, and the side walls of two adjacent second support rods in the first horizontal direction are abutted against each other.
In one possible implementation manner, welding connection is adopted between two adjacent first support rods and between two adjacent second support rods respectively.
In one possible implementation manner, a welding groove is respectively formed on one side of the first support rod, which is matched with each other, and one side of the second support rod, which is matched with each other.
In one possible implementation manner, the transformer heat dissipation device further comprises a cooling fan, wherein the cooling fan is arranged below the oil outlet pipe, and an air outlet is arranged upwards.
In one possible implementation manner, the oil inlet end of the oil inlet pipe is communicated with the middle part of the oil inlet pipe, the oil outlet end of the oil outlet pipe is communicated with the middle part of the oil outlet pipe, and the aperture of the oil passing hole on the oil inlet pipe and the aperture of the oil passing hole on the oil outlet pipe are respectively decreased from the middle to the two ends.
In one possible implementation manner, the heat dissipation box is provided with a plurality of oil channels along the first horizontal direction at intervals, the oil channels are vertically communicated, the second communication ports and the third communication ports are respectively provided with a plurality of oil channels, and the second communication ports and the third communication ports are corresponding to the oil channels.
Compared with the prior art, the transformer heat dissipation device provided by the invention has the beneficial effects that:
the transformer heat dissipation device comprises an oil inlet pipe, an oil outlet pipe and a heat dissipation assembly, wherein the oil inlet pipe is used for introducing insulating oil into the heat dissipation assembly for cooling, and the oil outlet pipe is used for conveying the cooled insulating oil into a box body for cooling a transformer body. The heat dissipation assembly is formed by arranging a plurality of first oil collecting boxes, a plurality of second oil collecting boxes and a plurality of heat dissipation units along a first horizontal direction. The heat dissipation unit comprises a plurality of heat dissipation boxes, wherein an oil duct is formed in each heat dissipation box, and the heat dissipation boxes are communicated through the first oil collection box and the second oil collection box. So set up, a plurality of radiating boxes simultaneous working can obtain great radiating area on the one hand, and the radiating effect is better to the heat dissipation demand of adaptation large-scale transformer. On the other hand, the thinking of becoming zero is adopted, the radiating unit is split into a plurality of radiating boxes with smaller volumes, so that the width of a steel plate required during machining of the radiating boxes is smaller, the flatness of the steel plate after stamping is higher, alignment is easier during welding, welding defects are not easy to occur, the welding quality of products is improved, the process of secondary maintenance is omitted, and the manufacturing cost is reduced.
In a second aspect, the present invention provides an oil-immersed transformer comprising:
the box body is internally provided with a containing cavity, insulating oil is contained in the containing cavity, and an oil inlet and an oil outlet are formed in the side wall of the containing cavity;
the transformer body is arranged in the accommodating cavity and is soaked in insulating oil;
at least one transformer heat dissipation device according to any one of the above embodiments, wherein the oil inlet pipe is communicated with the oil outlet, and the oil outlet pipe is communicated with the oil inlet; and
the circulating pump is arranged in the accommodating cavity and used for pumping insulating oil in the accommodating cavity to the oil inlet pipe through the oil outlet.
Compared with the prior art, the oil immersed transformer provided by the invention adopts the transformer heat dissipation device in any implementation mode, has the same technical effects as the transformer heat dissipation device, and is not repeated here.
Drawings
Fig. 1 is a schematic structural diagram of a heat dissipating device for a transformer according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a transformer heat dissipating device according to a second embodiment of the present invention;
FIG. 3 is an exploded view of a transformer heat dissipation device according to one embodiment of the present invention;
fig. 4 is a schematic explosion diagram of a transformer heat dissipating device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a heat dissipating unit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a heat dissipation case according to an embodiment of the present invention;
FIG. 7 is a schematic view showing the structure of a first support bar according to one embodiment of the present invention;
FIG. 8 is a schematic view showing the structure of a second support bar according to one embodiment of the present invention;
FIG. 9 is a schematic view of an oil inlet pipe according to an embodiment of the present invention;
FIG. 10 is a schematic view of an oil inlet pipe according to another embodiment of the present invention;
fig. 11 is a schematic structural diagram of an oil-immersed transformer according to one embodiment of the present invention.
Reference numerals illustrate:
1. a transformer heat sink; 10. an oil inlet pipe; 11. an oil passing hole; 12. an oil inlet end of the oil inlet pipe; 20. an oil outlet pipe; 21. an oil outlet end of the oil outlet pipe; 30. a heat dissipation assembly; 31. a first oil collection box; 32. a second oil collection box; 33. a heat radiation unit; 331. a heat dissipation box; 332. a first support bar; 333. a second support bar; 334. a first limit groove; 335. the second limit groove; 336. welding grooves; 337. an oil passage; 40. a cooling fan; 2. a box body.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed," "secured" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to," "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on," "disposed on" another element, it can be directly on the other element or intervening elements may also be present. "plurality" refers to two and more numbers. "at least one" refers to one and more quantities. "number" refers to one or more numbers.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Referring to fig. 1 to 11 together, a transformer heat dissipation device 1 and an oil-immersed transformer according to an embodiment of the invention are described below.
Referring to fig. 1 to 4 together with fig. 9, in a first aspect, an embodiment of the present invention provides a heat dissipating device 1 for a transformer, which includes an oil inlet pipe 10, an oil outlet pipe 20, and a heat dissipating assembly 30 disposed between the oil inlet pipe 10 and the oil outlet pipe 20, wherein the oil inlet pipe 10 and the oil outlet pipe 20 are disposed along a first horizontal direction, the oil inlet pipe 10 is disposed above the oil outlet pipe 20, a plurality of oil passing holes 11 are respectively disposed on one sides of the oil inlet pipe 10 and the oil outlet pipe 20 adjacent to the heat dissipating assembly 30, and the plurality of oil passing holes 11 are disposed at intervals along the first horizontal direction.
The heat dissipation assembly 30 includes a plurality of first oil collecting boxes 31, a plurality of second oil collecting boxes 32, and a plurality of heat dissipation units 33. The plurality of first oil collecting boxes 31 are arranged below the oil inlet pipe 10 at intervals along the first horizontal direction, a first oil collecting cavity is formed in the first oil collecting boxes 31 in a hollow mode, a first communication port is formed in the top of each first oil collecting box 31, a second communication port is formed in the bottom of each first oil collecting box 31, and the first communication ports are communicated with the first oil collecting cavity and the oil passing holes 11 on the oil inlet pipe 10; the plurality of second oil collecting boxes 32 are arranged above the oil outlet pipe 20 at intervals along the first horizontal direction and correspond to the first oil collecting boxes 31 one by one, second oil collecting cavities are formed in the second oil collecting boxes 32 in a hollow mode, third communication ports are formed in the tops of the second oil collecting boxes 32, fourth communication ports are formed in the bottoms of the second oil collecting boxes 32, and the fourth communication ports are communicated with the second oil collecting cavities and the oil passing holes 11 in the oil outlet pipe 20; the plurality of heat dissipation units 33 are arranged between the first oil collecting box 31 and the second oil collecting box 32 at intervals along the first horizontal direction and are in one-to-one correspondence with the first oil collecting boxes 31, the heat dissipation units 33 comprise a plurality of heat dissipation boxes 331 arranged at intervals along the second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, the heat dissipation boxes 331 are provided with oil ducts 337 which are vertically communicated, the upper ends of the oil ducts 337 are communicated with the first oil collecting cavity through second communication ports, and the lower ends of the oil ducts 337 are communicated with the second oil collecting cavity through third communication ports.
Compared with the prior art, the transformer heat dissipation device 1 provided by the embodiment of the invention has the beneficial effects that:
the transformer heat dissipation device 1 provided by the embodiment of the invention comprises an oil inlet pipe 10, an oil outlet pipe 20 and a heat dissipation assembly 30, wherein the oil inlet pipe 10 is used for introducing insulating oil into the heat dissipation assembly 30 for cooling, and the oil outlet pipe 20 is used for conveying the cooled insulating oil into the box body 2 for cooling the transformer body. The heat dissipation assembly 30 is composed of a plurality of first oil collecting boxes 31, a plurality of second oil collecting boxes 32, and a plurality of heat dissipation units 33 arranged in a first horizontal direction. The heat dissipation unit 33 of the present invention includes a plurality of heat dissipation boxes 331, and an oil passage 337 is formed inside the heat dissipation boxes 331, and the plurality of heat dissipation boxes 331 are communicated through the first and second oil collection boxes 31 and 32. So set up, a plurality of heat dissipation boxes 331 simultaneous working can obtain great radiating area on the one hand, and the radiating effect is better to the heat dissipation demand of adaptation large-scale transformer. On the other hand, the thinking of becoming zero is adopted, the radiating unit 33 is split into a plurality of radiating boxes 331 with smaller volumes, so that the width of a steel plate required in the process of machining the radiating boxes 331 is smaller, the flatness of the steel plate after stamping is higher, alignment is easier and tidy in welding, welding defects are not easy to occur, the welding quality of products is improved, the process of secondary maintenance is omitted, and the manufacturing cost is reduced.
In the embodiment of the invention, the oil inlet pipe 10 and the oil outlet pipe 20 are arranged symmetrically up and down, the former is used for oil inlet, the latter is used for oil outlet, and the shapes, structures and materials of the oil inlet pipe and the oil outlet pipe can be the same or different. The oil inlet pipe 10 and the oil outlet pipe 20 are respectively provided with an oil passing hole 11 to communicate with a corresponding first oil collecting case 31 or second oil collecting case 32.
The heat dissipation assembly 30 includes a plurality of first oil collecting boxes 31, a plurality of second oil collecting boxes 32, and a plurality of heat dissipation boxes 331, where the first oil collecting boxes 31 and the second oil collecting boxes 32 are arranged symmetrically up and down, and the shapes, structures and materials of the first oil collecting boxes 31 and the second oil collecting boxes can be the same or different. The first oil collecting box 31 is hollow and provided with a first oil collecting cavity, the first oil collecting cavity is communicated with the oil inlet pipe 10 through a first communication port at the top, and is communicated with the heat dissipation box 331 through a second communication port at the bottom. The second oil collecting chamber 32 is hollow and formed with a second oil collecting chamber, and the second oil collecting chamber is communicated with the heat dissipation box 331 through a third communication port at the top and is communicated with the oil outlet pipe 20 through a fourth communication port at the bottom.
The heat dissipation box 331 is slice or board type, and the inside oil duct 337 that is formed of heat dissipation box 331, when the heat dissipation box 331 was made, can adopt two same steel sheet punching press, then the lock is in the same place to with faying face and marginal welded fastening, form inside oil duct 337 through welding equipment. Each of the heat dissipation boxes 331 has a plurality of oil passages 337 therein, and the cross-sectional shape of the oil passages 337 may be rectangular, hexagonal, or the like.
During manufacturing, the oil inlet pipe 10, the oil outlet pipe 20, the first oil collecting box 31, the second oil collecting box 32, and the heat dissipation box 331 may be integrally connected by welding, and after welding, pressing and leak testing are required, and after leak testing is qualified, inner wall painting and other processes are performed.
Referring to fig. 1 to 5, and fig. 7, in some possible embodiments, the heat dissipating unit 33 further includes a first supporting rod 332, and the first supporting rod 332 is connected between a plurality of heat dissipating boxes 331 distributed in the second horizontal direction.
The heat dissipation unit 33 in this embodiment further includes a first support rod 332, where the first support rod 332 is connected between the plurality of heat dissipation boxes 331, so as to help ensure the connection strength between the plurality of heat dissipation boxes 331 and prevent the heat dissipation boxes 331 from being deformed. The first support bar 332 may be disposed vertically or horizontally. When vertically arranged, the first support bars 332 on each heat dissipating unit 33 are provided in plurality, and the first support bars 332 are connected between two adjacent heat dissipating boxes 331. When the lateral arrangement is adopted, the first support bar 332 may be simultaneously connected with a plurality of the heat radiating boxes 331. The first support rod 332 may be fixedly connected to the heat dissipation case 331 by welding.
Referring to fig. 1 to 5, and fig. 7, in some possible embodiments, the first support rods 332 are disposed vertically, and a first limiting groove 334 is formed on a side adjacent to the heat dissipation box 331 vertically, and the side walls of the heat dissipation box 331 are accommodated in the first limiting groove 334, and the side walls of two adjacent first support rods 332 in the first horizontal direction are abutted.
In this embodiment, the first support rod 332 is disposed vertically, so that, for convenience in installation, a first limiting groove 334 is formed on one side of the first support rod 332 adjacent to the corresponding heat dissipation box 331, and the side surface of the heat dissipation box 331 is accommodated in the first limiting groove 334, so that the heat dissipation box 331 and the first support rod 332 are welded into a whole.
Referring to fig. 1 to 5, and fig. 8, in some possible embodiments, the heat dissipating unit 33 further includes a second supporting rod 333, the second supporting rod 333 is disposed outside the heat dissipating box 331 disposed at the edge, the second supporting rod 333 is disposed vertically, a second limiting groove 335 is disposed vertically at a side adjacent to the heat dissipating box 331, the side wall of the heat dissipating box 331 is accommodated in the second limiting groove 335, and the side walls of two adjacent second supporting rods 333 in the first horizontal direction are abutted.
In this embodiment, the second support rod 333 is disposed outside the heat dissipation box 331 located at the edge, as shown in fig. 1, the heat dissipation box 331, the first support rod 332, and the second support rod 333 can be enclosed to form a heat dissipation channel, and the heat dissipation channel is vertically penetrated.
The first support rod 332 and the second support rod 333 in this embodiment can fix the heat dissipation box 331 on the one hand, and improve the overall structural strength. On the other hand, the first support rod 332 and the second support rod 333 enclose the heat dissipation box 331 to form a heat dissipation channel with a closed periphery, and the heat dissipation channel is penetrated up and down, so that the air flow inside the heat dissipation channel can be accelerated without additional energy input, thereby increasing the heat convection coefficient of the heat dissipation component 30 and improving the heat dissipation effect. The first support rod 332 and the second support rod 333 may be made of steel material, and are made of the same material as the heat dissipation case 331, so as to be welded with the heat dissipation case 331 as a whole.
In addition to the welding, the first support rod 332 and the second support rod 333 may be fixed by a fastener such as a screw. In order to reduce the weight, the first support rod 332 and the second support rod 333 may be made of hollow square tubes.
In some possible embodiments, the two adjacent first support rods 332 and the two adjacent second support rods 333 are respectively connected by welding.
Referring to fig. 7 and 8, in some possible embodiments, a welding groove 336 is formed on a side of the first support rod 332 where the first support rod is abutted to each other, and a side of the second support rod 333 where the second support rod is abutted to each other, the welding groove 336 is a 45 ° chamfer, and a weld is formed after the two welding grooves 336 are abutted to each other, so that welding of the welding head is facilitated.
Referring to fig. 11, in some possible embodiments, the transformer heat dissipation device 1 further includes a cooling fan 40, the cooling fan 40 is disposed below the oil outlet pipe 20, and an air outlet is disposed upward. In this embodiment, the cooling fan 40 is disposed at the bottom, and the cooling fan 40 is fixed on the case 2 as shown in fig. 11, so that the air flow speed around the heat dissipating component 30 can be increased, thereby increasing the heat exchange speed with the outside and improving the heat dissipating effect.
In practical use, it is found that after the insulating oil in the transformer enters the oil passage 337 in the heat dissipation box 331, most of the oil flow path tends to flow toward the oil return port in the shortest path, i.e. the oil short circuit phenomenon. The oil short circuit phenomenon may make the oil flow in the oil passages 337 at both sides of the heat dissipation case 331 insufficient, and the expected heat exchange effect may not be achieved.
In order to solve the above problem, referring to fig. 9 and 10, in some possible embodiments, the oil inlet end 12 of the oil inlet pipe 10 is connected to the middle of the oil inlet pipe 10, the oil outlet end 21 of the oil outlet pipe 20 is connected to the middle of the oil outlet pipe 20, and the aperture of the oil passing hole 11 on the oil inlet pipe 10 and the aperture of the oil passing hole 11 on the oil outlet pipe 20 decrease from the middle to the two ends respectively.
In this embodiment, the oil inlet end 12 of the oil inlet pipe 10 and the oil outlet end 21 of the oil outlet pipe 20 are respectively disposed in the middle of the pipe body, and the aperture of the oil passing hole 11 gradually decreases from the middle to two sides, the distance between the middle positions is short, the distance between the oil passing hole 11 is small, the distance between the edge positions is long, and the oil passing hole 11 is large. By the arrangement, the oil inside the heat dissipation unit 33 at different positions along the first horizontal direction can be balanced, so that the oil flowing speeds of the oil passages 337 in the heat dissipation units 33 at different positions tend to be consistent, the heat dissipation capacity of the heat dissipation units 33 at different positions can be exerted to a greater extent, and the heat dissipation effect is better.
Referring to fig. 6, in some possible embodiments, the heat dissipation box 331 is provided with a plurality of oil channels 337 at intervals along the first horizontal direction, the oil channels 337 are vertically penetrated, the second communication port and the third communication port are respectively provided with a plurality of oil channels 337, and the second communication port and the third communication port respectively correspond to the oil channels 337.
Referring to fig. 11, in a second aspect, an embodiment of the present invention provides an oil-immersed transformer, which includes a case 2, a transformer body, a transformer heat dissipation device 1, and a circulating pump. A containing cavity is formed in the box body 2, insulating oil is contained in the containing cavity, and an oil inlet and an oil outlet are formed in the side wall of the containing cavity; the transformer body is arranged in the accommodating cavity and is soaked in insulating oil; the oil inlet pipe 10 of the transformer heat dissipation device 1 is communicated with an oil outlet, and the oil outlet pipe 20 is communicated with an oil inlet; the circulating pump is arranged in the accommodating cavity and is used for pumping insulating oil in the accommodating cavity to the oil inlet pipe 10 through the oil outlet.
When the oil immersed transformer provided by the embodiment of the invention is used, the accommodating cavity in the box body 2 is filled with insulating oil, the transformer body is soaked in the insulating oil, the circulating pump can continuously pump the insulating oil to the oil inlet pipe 10, so that the insulating oil flows through the heat radiating component 30 to exchange heat with the outside to cool, the cooled insulating oil returns to the accommodating cavity to cool the transformer body, and the circulation is performed. One or more transformer heat sinks 1 can be arranged according to the requirement, and when a plurality of transformer heat sinks 1 are arranged, the simultaneous operation of the plurality of transformer heat sinks 1 is not affected.
It will be appreciated that the portions of the foregoing embodiments may be freely combined or omitted to form different combined embodiments, and the details of the respective combined embodiments are not described herein, so that after the description, the present disclosure may be considered as having described the respective combined embodiments, and the different combined embodiments can be supported.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The transformer heat dissipation device is characterized by comprising an oil inlet pipe, an oil outlet pipe and a heat dissipation assembly arranged between the oil inlet pipe and the oil outlet pipe, wherein the oil inlet pipe and the oil outlet pipe are respectively arranged along a first horizontal direction;
the heat dissipation assembly includes:
the plurality of first oil collecting boxes are arranged at intervals along the first horizontal direction and below the oil inlet pipe, a first oil collecting cavity is formed in the first oil collecting boxes in a hollow mode, a first communication port is formed in the top of each first oil collecting box, a second communication port is formed in the bottom of each first oil collecting box, and the first communication ports are communicated with the first oil collecting cavity and the oil passing holes in the oil inlet pipe;
the second oil collecting boxes are arranged at intervals along the first horizontal direction and are arranged above the oil outlet pipe, the second oil collecting boxes are in one-to-one correspondence with the first oil collecting boxes, second oil collecting cavities are formed in the second oil collecting boxes in a hollow mode, a third communication port is formed in the top of each second oil collecting box, a fourth communication port is formed in the bottom of each second oil collecting box, and the fourth communication ports are communicated with the second oil collecting cavities and the oil passing holes in the oil outlet pipe; and
the heat dissipation units are arranged between the first oil collecting box and the second oil collecting box at intervals along the first horizontal direction and correspond to the first oil collecting boxes one by one, the heat dissipation units comprise a plurality of heat dissipation boxes arranged at intervals along the second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, the heat dissipation boxes are provided with oil channels which are vertically communicated, the upper ends of the oil channels are communicated with the first oil collecting cavity through the second communication ports, and the lower ends of the oil channels are communicated with the second oil collecting cavity through the third communication ports;
the heat dissipation unit further comprises a first support rod, and the first support rod is connected among the plurality of heat dissipation boxes;
the first support rods are vertically arranged, a first limit groove is vertically formed in one side, adjacent to the corresponding heat dissipation box, of each first support rod, the side walls of the heat dissipation boxes are accommodated in the first limit grooves, and the side walls of the two adjacent first support rods are abutted against each other in the first horizontal direction;
the heat dissipation unit further comprises a second support rod, the second support rod is arranged on the outer side of the heat dissipation box at the edge, the second support rod is vertically arranged, a second limit groove is vertically formed in one side, adjacent to the heat dissipation box, of the second support rod, the side wall of the heat dissipation box is accommodated in the second limit groove, and the side walls of the two adjacent second support rods are abutted against each other in the first horizontal direction;
the first support rod and the second support rod are enclosed with the heat dissipation box to form a heat dissipation channel with the periphery closed and the upper and lower parts communicated.
2. The heat sink of claim 1, wherein two adjacent first support bars and two adjacent second support bars are respectively welded.
3. The heat sink of claim 2, wherein welding grooves are formed on one side of the first support bars and one side of the second support bars.
4. The transformer heat sink of claim 1, further comprising a cooling fan disposed below the oil outlet pipe with an air outlet facing upward.
5. The heat dissipating device of claim 1, wherein an oil inlet end of the oil inlet pipe is connected to a middle part of the oil inlet pipe, an oil outlet end of the oil outlet pipe is connected to a middle part of the oil outlet pipe, and an aperture of the oil passing hole on the oil inlet pipe and an aperture of the oil passing hole on the oil outlet pipe are respectively decreased from the middle to the two ends.
6. The transformer heat abstractor of claim 1, wherein the heat dissipation box is provided with a plurality of oil ducts along the first horizontal direction at intervals, the oil ducts are vertically communicated, the second communication ports and the third communication ports are respectively provided with a plurality of oil ducts, and the second communication ports and the third communication ports are in one-to-one correspondence with the oil ducts.
7. Oil immersed transformer, its characterized in that includes:
the box body is internally provided with a containing cavity, insulating oil is contained in the containing cavity, and an oil inlet and an oil outlet are formed in the side wall of the containing cavity;
the transformer body is arranged in the accommodating cavity and is soaked in insulating oil;
at least one transformer heat sink according to any one of claims 1-6, said oil inlet pipe communicating with said oil outlet, said oil outlet pipe communicating with said oil inlet; and
the circulating pump is arranged in the accommodating cavity and used for pumping insulating oil in the accommodating cavity to the oil inlet pipe through the oil outlet.
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| CN117275889B true CN117275889B (en) | 2024-03-05 |
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| CN210167234U (en) * | 2019-07-17 | 2020-03-20 | 沈阳东电电力设备开发有限公司 | Detachable finned radiator |
| CN216719682U (en) * | 2021-12-02 | 2022-06-10 | 江苏国鑫电气科技有限公司 | Corrugated radiator of oil-immersed transformer |
| KR20230062928A (en) * | 2021-11-01 | 2023-05-09 | 엘에스일렉트릭(주) | Cooling device for transformer |
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| US20060207747A1 (en) * | 2005-03-18 | 2006-09-21 | Cpumate Inc. | Isothermal plate heat-dissipating device |
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| CN2517087Y (en) * | 2001-12-20 | 2002-10-16 | 朱得文 | Cooling device for transformer |
| JP2009123917A (en) * | 2007-11-15 | 2009-06-04 | Hitachi Industrial Equipment Systems Co Ltd | Radiator and transformer attached with the same |
| JP2010153443A (en) * | 2008-12-24 | 2010-07-08 | Fujitsu Ltd | Cooling device, cooling-device manufacturing method, and electronic apparatus |
| CN204760176U (en) * | 2015-05-06 | 2015-11-11 | 王天林 | Elliptical tube radiator for transformer |
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| CN117275889A (en) | 2023-12-22 |
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