CN113871151A

CN113871151A - Finned radiator for transformer with efficient heat dissipation

Info

Publication number: CN113871151A
Application number: CN202111156125.XA
Authority: CN
Inventors: 钱柯恒; 虞礼辉; 王建忠
Original assignee: Changshu Youbang Radiator Co ltd
Current assignee: Changshu Youbang Radiator Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-12-31

Abstract

The utility model provides a finned radiator for high-efficient radiating transformer, includes a set of fin, and a plurality of fins are cavity cuboid plate structure and are formed with fluid circulation cavity, characteristics in it: the nearly topside border position department of body at the fin and close to the tip position department that is close to the long limit of one side of fin have cup jointed first even pipe, nearly the bottom border position department and close to the long limit position department of the opposite side of fin have cup jointed the second even pipe on the body of fin, two adjacent fins are first that the opening set up through both ends, intercommunication between each other is realized to the second even pipe, and first, the position of second even pipe is corresponding to the both ends tip of the diagonal of the terminal surface of a plurality of fins, connect into on the fin in the outside of a set of a plurality of fins, return oil pipe, a set of fin can be with advancing the leading-in high temperature fluid of oil pipe through first, the second even drains the drainage of pipe and dispels the heat the back and leads to in the oil pipe. The heat dissipation area is large, and the heat dissipation effect is improved; the heat exchange efficiency is improved, and the production cost is reduced.

Description

Finned radiator for transformer with efficient heat dissipation

Technical Field

The invention belongs to the technical field of cooling equipment for transformers, and particularly relates to a finned radiator for a transformer, which can efficiently radiate heat.

Background

With the rapid development of economy and the rapid growth of manufacturing industry in China, the demand of each field in China for electric power is also increasing year by year, and the demand of power transformers is also increasing rapidly. Most of the existing transformers are oil-immersed transformers, which are novel high-performance transformers with more reasonable structure and better performance, and oil is used as a main insulation means of the transformers and a cooling medium of the transformers, when the power transformer operates, the internal windings, iron cores and other components can generate loss, the loss is converted into heat and transfers the heat to an oil tank wall through the heat conduction and convection action of transformer oil, so that the temperature of the windings, the iron cores, the oil tank wall and the oil surface can be continuously increased, the temperature rise can directly influence the service life of the insulation materials such as the windings, therefore, the temperature must be controlled within a certain range, and the consumption of a plate radiator which is used as a core component capable of controlling the internal temperature of the transformers is more and more. As known in the art, the finned radiator is a high-efficiency heat dissipation device which is arranged on two sides of the body of the oil-immersed transformer in the long edge direction and is connected by means of flanges, and the finned radiator and heat conduction oil inside the oil-immersed transformer form a circulating cooling loop, so that the oil-immersed transformer is ensured to stably operate for a long time, an effect of cooling an iron core inside the oil-immersed transformer is achieved, temperature rise of the oil-immersed transformer is controlled, and normal operation and safety of a power supply and distribution system are further ensured.

Technical information on the finned radiator is not available in the existing chinese patent documents, and a few examples thereof include: CN209947613U (high efficiency heat sink for oil immersed transformer finned radiator), CN206225138U (finned radiator for transformer), CN210722669U (finned radiator for power transformer), CN203706791U (novel energy saving finned radiator for transformer), and so on, typically, "a transformer finned radiator" introduced in chinese utility model patent document with publication number CN206451573U includes multiple heat sinks arranged at intervals, both ends of the heat sinks are connected with liquid inlet pipe and liquid outlet pipe respectively; the fin includes two pressboards that the superpose is in the same place, is formed with many parallel arrangement's bar ripple on at least one of two pressboards, and the ripple includes crest and trough, and trough and another relative pressboard laminate mutually, crest and another relative pressboard phase separation are in order to form the coolant liquid passageway, and feed liquor pipe and drain pipe are connected respectively to the both ends of coolant liquid passageway. The present invention has an advantage that the number of coolant passages and the heat dissipation area of the fins are increased and the heat dissipation efficiency is ensured by forming the fins by laminating two pressing plates and forming the coolant passages by using the corrugated shape of the pressing plates as described above, but the technical solution has a common disadvantage of the fin heat sink in the above patent document and the prior art: because the radiator adopts the liquid inlet pipe and the liquid outlet pipe which are in the form of two punched steel pipes, and a structure of a plurality of radiating fins is integrated between the two liquid inlet pipes and the liquid outlet pipe, the flowing section of the transformer oil in the steel pipes is small, the resistance is large, so that the flow velocity of the transformer oil is limited, a thermal boundary layer is thick, the convective heat transfer resistance is large, the problems of poor radiating effect of the radiator exist, and the market demand cannot be further met; simultaneously, feed liquor pipe and drain pipe are through installing the central point department of putting at fin direction of height both ends tip among the prior art, and this also can make the radiating efficiency of the different positions of every fin different, cause the oil stream in the piece unbalance, especially the problem that the radiating effect is poor can appear overstocking and short circuit to the fluid of fin both sides.

In view of the above, there is a need for a plate radiator for a transformer, which has a simple structure and can effectively improve the heat dissipation effect without increasing the production cost. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

Disclosure of Invention

The invention aims to provide a finned radiator for a transformer, which has a simple and compact structure and low manufacturing cost, can efficiently radiate heat, is beneficial to abandoning the existing structure of punching holes on the whole steel pipe and welding a plurality of radiating fins and adopting a connecting pipe matching mode to increase the flowing section area of transformer oil, improve the flow velocity of the transformer oil and ensure the heat radiation effect of the transformer, and is beneficial to forming an oil circulation loop with an upper left-right structure or an upper right-left structure on the whole radiator so as to ensure that the flowing of the transformer oil is more sufficient and uniform and further effectively improve the heat exchange efficiency.

The invention is to accomplish the task in such a way, a finned radiator for a transformer with high-efficiency heat dissipation comprises a group of radiating fins which are longitudinally parallel to each other and are arranged at equal intervals, a plurality of radiating fins are all of hollow cuboid plate structure, and oil liquid circulation chambers are formed in the radiating fins, the finned radiator is characterized in that a first connecting pipe is sleeved at the position close to the top edge of a radiating fin body and the end part close to one long edge of the radiating fin, a second connecting pipe is sleeved at the position close to the bottom edge of the radiating fin body and the other long edge of the radiating fin body, two adjacent radiating fins are communicated with each other through a first connecting pipe and a second connecting pipe which are both provided with openings at two ends, and the positions of the first connecting pipe and the second connecting pipe correspond to the end parts at two ends of a diagonal line of the end surfaces of the plurality of radiating fins, the heat dissipation device is characterized in that an oil inlet pipe and an oil return pipe are further connected to the outermost side of the plurality of heat dissipation fins, the oil inlet pipe is arranged at a position corresponding to the first connecting pipe, the oil return pipe is arranged at a position corresponding to the second connecting pipe, the first connecting pipe and the second connecting pipe on the innermost side of the plurality of heat dissipation fins are arranged in a sealing mode at one end, and the group of heat dissipation fins can conduct heat dissipation on high-temperature oil led into the oil inlet pipe through the drainage of the first connecting pipe and the second connecting pipe and then lead the high-temperature oil back into the oil return pipe.

In a specific embodiment of the present invention, each of the plurality of heat dissipation fins is composed of a front heat dissipation pressing plate and a rear heat dissipation pressing plate, the front heat dissipation pressing plate and the rear heat dissipation pressing plate are arranged opposite to each other and peripheral edge portions of the front heat dissipation pressing plate and the rear heat dissipation pressing plate are welded together, so that the front heat dissipation pressing plate and the rear heat dissipation pressing plate are fixedly mounted together.

In another specific embodiment of the present invention, the heat sink is provided with a plurality of spacers at intervals in the width direction, the plurality of spacers extend from the top to the bottom of the heat sink in a vertical state along the height direction of the heat sink, the front heat dissipation pressure plate sheet and the rear heat dissipation pressure plate sheet are pressed and fused at the positions of the spacers to form an integrated structure, and the front heat dissipation pressure plate sheet and the rear heat dissipation pressure plate sheet are separated from each other by the spacers to form a plurality of heat dissipation flow channels arranged along the vertical direction.

In yet another embodiment of the present invention, an oil inlet pipe connecting flange is formed on the oil inlet pipe, and an upper oil outlet plug communicating with the inside of the oil inlet pipe is provided at a position above the outer peripheral side wall of the oil inlet pipe body.

In yet another embodiment of the present invention, a flowline attachment flange is also formed on the flowline and a lower plug is provided at a location below the peripheral sidewall of the flowline body and communicates with the interior of the flowline.

In still another embodiment of the present invention, the heat sink body, the oil inlet pipe and the oil outlet pipe are made of aluminum alloy material with good thermal conductivity.

The invention has the technical effects that: compared with the structure that the whole steel pipe is punched and welded at two ends of a group of a plurality of radiating fins in the height direction in the prior art, the technical scheme has the advantages that the first connecting pipe and the second connecting pipe which can realize the mutual communication of two adjacent radiating fins are directly sleeved on the radiating fins, so that the flow sectional area can be effectively increased, the flow resistance can be reduced, oil can uniformly reach each radiating unit, the flow velocity of transformer oil is favorably improved, the thickness of a thermal boundary layer is reduced to increase the convection heat transfer coefficient, the connecting pipe type radiating fins can realize multiple connection, the integral length and size of the radiator are not limited by the length of the steel pipe in the prior art, a larger radiating area can be provided, and the radiating effect of a transformer is effectively improved; secondly, because the position of first connecting pipe and second connecting pipe is corresponding to a plurality ofly the both ends tip of the diagonal of the terminal surface of fin, the whole fluid circulation return circuit that can form into upper left and lower right or upper right and lower left structure of radiator, compare in prior art and set up the fluid circulation return circuit of steel pipe in the central point department at fin direction of height both ends, the flow of transformer oil is more sufficient even, can further effectively improve heat exchange efficiency to can reduce the manufacturing cost of transformer with high efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is an exploded view of two adjacent heat sinks in the embodiment shown in fig. 1.

Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 4 is an exploded view of two adjacent heat sinks in the embodiment shown in fig. 3.

In the figure: 1. the heat dissipation plate comprises a heat dissipation plate, 11, a first connecting pipe, 12, a second connecting pipe, 13, a front heat dissipation pressure plate piece, 14, a rear heat dissipation pressure plate piece and 15, a separation strip; 2. an oil inlet pipe 21, an oil inlet pipe connecting flange 22 and an oil outlet plug 22 are arranged; 3. an oil return pipe 31, an oil outlet pipe connecting flange 32 and an oil outlet plug.

Detailed Description

In order to clearly understand the technical spirit and advantages of the present invention, the following detailed description is given by way of examples, but the descriptions of the examples are not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be construed as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position state of fig. 1, and thus, it should not be understood as a particular limitation to the technical solution provided by the present invention.

Example one

Referring to fig. 1 and 2, a finned heat sink for a transformer with high heat dissipation efficiency is illustrated, which includes a set of heat sinks 1 longitudinally parallel to each other and equidistantly spaced from each other, wherein the plurality of heat sinks 1 are all of hollow rectangular plate structure and have an oil fluid flow chamber formed therein.

The technical key points of the technical scheme provided by the invention are as follows: a first connecting tube 11 is sleeved at the position close to the edge of the top edge of the body of the radiating fin 1 and close to the end position of the long edge at one side of the radiating fin 1, a second connecting tube 12 is sleeved at the position close to the edge of the bottom edge of the body of the radiating fin 1 and close to the position of the long edge at the other side of the radiating fin 1, the adjacent two radiating fins 1 are communicated with each other through the first connecting tube 11 and the second connecting tube 12 which are both provided with openings, the positions of the first connecting tube 11 and the second connecting tube 12 correspond to the two end parts of the diagonal line of the end surfaces of the plurality of radiating fins 1, an oil inlet tube 2 and an oil return tube 3 are further connected to the radiating fin 1 at the outermost side of the group of the plurality of radiating fins 1, wherein the oil inlet tube 2 is arranged at the position corresponding to the first connecting tube 11, the oil return tube 3 is arranged at the position corresponding to the second connecting tube 12, the first connecting pipe 11 and the second connecting pipe 12 on the innermost radiating fin 1 of the group of the plurality of radiating fins 1 are arranged in a sealing mode at one end, and the group of the radiating fins 1 can conduct heat dissipation on high-temperature oil led in by the oil inlet pipe 2 through the drainage of the first connecting pipe 11 and the second connecting pipe 12 and then lead back to the oil return pipe 3.

In this embodiment, as shown in fig. 1, the first connecting pipe 11 is disposed at a left position close to the top edge of the heat sink 1, and the second connecting pipe 12 is disposed at a right position close to the bottom edge of the heat sink 1, so that an oil circulation loop of an upper left-lower-right structure is formed on a plurality of heat sinks 1, and the first connecting pipe 11 and the second connecting pipe 12 are welded and fixed on the heat sink 1, when two adjacent heat sinks 1 need to be connected and fixed to each other, the first connecting pipe 11 and the second connecting pipe 12 on the previous heat sink 1 are welded and fixed on the end surface of the next heat sink 1, so that the two heat sinks 1 are fixed.

Further, the plurality of the heat dissipation fins 1 are each composed of a front heat dissipation pressing plate 13 and a rear heat dissipation pressing plate 14, the front heat dissipation pressing plate 13 and the rear heat dissipation pressing plate 14 are arranged opposite to each other, and peripheral edge portions of the front heat dissipation pressing plate 13 and the rear heat dissipation pressing plate 14 are welded together, so that the front heat dissipation pressing plate 13 and the rear heat dissipation pressing plate 14 are fixedly installed together.

Further, the heat sink 1 is provided with a plurality of division bars 15 at intervals in the width direction, the plurality of division bars 15 extend from the top to the bottom of the heat sink 3 in a vertical state along the height direction of the heat sink, the front heat dissipation pressure plate 13 and the rear heat dissipation pressure plate 14 are pressed and fused at the positions of the division bars 15 to form an integral structure, and the front heat dissipation pressure plate 13 and the rear heat dissipation pressure plate 14 are divided into a plurality of heat dissipation flow channels 16 arranged along the vertical direction through the division bars 15.

Preferably, an oil inlet pipe connecting flange 21 is formed on the oil inlet pipe 2, and an upper oil outlet plug 22 communicated with the inside of the oil inlet pipe 2 is arranged at a position above the peripheral side wall of the body of the oil inlet pipe 2; an oil outlet pipe connecting flange 31 is also formed on the oil outlet pipe 3, and a lower oil plug 32 communicating with the inside of the oil outlet pipe 3 is provided at a lower position of the outer peripheral side wall of the body of the oil outlet pipe 3.

Preferably, the cooling fin 1 body, the oil inlet pipe 2 and the oil outlet pipe 3 are all made of aluminum alloy materials with good heat conductivity.

Example two

In the present embodiment, as shown in fig. 3 and 4, the first connecting pipe 11 is disposed at a right position close to the top edge of the heat sink 1, and the second connecting pipe 12 is disposed at a left position close to the bottom edge of the heat sink 1, so that an oil circulation circuit of an upper-right-lower-left structure is formed on a group of the plurality of heat sinks 1.

In this embodiment, the technical features are the same as those of the first embodiment except that the technical features of the arrangement positions of the first connecting pipe 11 and the second connecting pipe 12 are different from those of the first embodiment.

In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.

Claims

1. The utility model provides a finned radiator for high-efficient radiating transformer, is including a set of fin (1) that vertically parallels each other and the equidistance that separates each other sets up, and a plurality of fin (1) are cavity cuboid plate structure and are formed with fluid circulation cavity at its inside, its characterized in that the nearly top edge border position department of body of fin (1) and be close to in first connecting pipe (11) have been cup jointed in the tip position department on one side long limit of fin (1), and be close to bottom edge border position department and cup joint in the opposite side long limit position department of fin (1) second connecting pipe (12) on the body of this fin (1), adjacent two fin (1) are the first connecting pipe (11) and the second connecting pipe (12) that the opening set up through both ends and realize intercommunication each other, just the position of first connecting pipe (11) and second connecting pipe (12) corresponds to a plurality of the both ends tip of the diagonal of fin (1) terminal surface The oil-return type oil-gas heat dissipation device is characterized in that an oil inlet pipe (2) and an oil return pipe (3) are further connected to the heat dissipation fins (1) on the outermost side of the heat dissipation fins (1), the oil inlet pipe (2) is arranged at a position corresponding to the first connecting pipe (11), the oil return pipe (3) is arranged at a position corresponding to the second connecting pipe (12), the first connecting pipe (11) and the second connecting pipe (12) on the heat dissipation fins (1) on the innermost side of the heat dissipation fins (1) are arranged in a sealing mode at one end, and the heat dissipation fins (1) can conduct heat dissipation on high-temperature oil led into the oil inlet pipe (2) through the drainage of the first connecting pipe (11) and the second connecting pipe (12) and then lead back to the oil return pipe (3).

2. The finned radiator for the transformer with the efficient heat dissipation function as recited in claim 1, wherein the plurality of fins (1) are each composed of a front heat dissipation pressure plate piece (13) and a rear heat dissipation pressure plate piece (14), the front heat dissipation pressure plate piece (13) and the rear heat dissipation pressure plate piece (14) are arranged opposite to each other and peripheral edge portions of the front heat dissipation pressure plate piece and the rear heat dissipation pressure plate piece are welded together, so that the front heat dissipation pressure plate piece (13) and the rear heat dissipation pressure plate piece (14) are fixedly installed together.

3. The finned radiator for the transformer with high-efficiency heat dissipation according to claim 2 is characterized in that the heat dissipation fin (1) is provided with a plurality of separation strips (15) at intervals in the width direction, the separation strips (15) extend from the top to the bottom of the heat dissipation fin (3) in a vertical state along the height direction of the heat dissipation fin, the front heat dissipation pressure plate sheet (13) and the rear heat dissipation pressure plate sheet (14) are punched and fused at the positions of the separation strips (15) to form an integral structure, and the front heat dissipation pressure plate sheet (13) and the rear heat dissipation pressure plate sheet (14) are separated from each other by the separation strips (15) to form a plurality of heat dissipation flow channels (16) arranged along the vertical direction.

4. The finned radiator for the transformer with the efficient heat dissipation function as recited in claim 1, wherein an oil inlet pipe connecting flange (21) is formed on the oil inlet pipe (2), and an upper oil outlet plug (22) communicated with the inside of the oil inlet pipe (2) is provided at a position above the outer peripheral side wall of the body of the oil inlet pipe (2).

5. The finned radiator for a transformer with high heat dissipation efficiency as recited in claim 1, wherein an oil outlet pipe connecting flange (31) is also formed on said oil outlet pipe (3), and a lower oil outlet plug (32) communicating with the inside of said oil outlet pipe (3) is provided at a lower position of the outer peripheral side wall of the body of said oil outlet pipe (3).

6. The finned radiator for the transformer with the efficient heat dissipation function as recited in claim 1, wherein the body of the heat dissipation fin (1), the oil inlet pipe (2) and the oil outlet pipe (3) are all made of aluminum alloy material with good heat conductivity.