CN112053838A

CN112053838A - Steel-aluminum support protection type aluminum alloy heat dissipation device for oil-immersed power transformer and manufacturing method

Info

Publication number: CN112053838A
Application number: CN201910485227.2A
Authority: CN
Inventors: 王天林; 曲寿晴; 万成; 姜洪强
Original assignee: Shenyang Tiantong Electric Co ltd
Current assignee: Shenyang Tiantong Electric Co ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-12-08

Abstract

A steel-aluminium supporting-protecting type aluminium alloy radiator for oil immersed power transformer is composed of aluminium radiator body with internal and external heat-conducting wings, external vertical frame made of aluminium wing tube or steel tube, oil collecting box welded to both ends of radiator and oil collecting tube to become radiator unit, and circular or square radiators with air hood and unpowered fan: by taking the heat dissipation area and the aluminum thermal conductivity as parameters and according to the calculation method of JB5347-2013, the specifications of the original sheet type radiator can be combined, the modularized prefabrication production of semi-finished products can be realized, when an order is made, the semi-finished products only need to be assembled and welded, then are washed and checked, and are packaged and delivered after being provided with an unpowered fan; the steel aluminum frame supports and protects the assurance intensity, intraductal conductor and outer aluminium wing heat dissipation simultaneously, join in marriage the unpowered fan of dress and increase the heat dissipation power, adopts semi-manufactured goods modularization prefabrication mode, innovation trade production mode.

Description

Steel-aluminum support protection type aluminum alloy heat dissipation device for oil-immersed power transformer and manufacturing method

Technical Field

The invention belongs to the field of processing, and relates to manufacturing of a steel-aluminum support protection type aluminum alloy heat dissipation device for an oil-immersed power transformer.

Background

One major obstacle in the development of large-capacity oil-immersed power transformers is that the heat dissipation power of a heat dissipation device is too low, the periphery of an oil tank of the whole transformer is almost shielded by a finned radiator, crowded arrangement is more unfavorable for heat dissipation, along with the trend of urbanization, the urban power consumption is rapidly expanded, high-voltage power transmission enters the center of an urban area, a high-voltage urban transformer substation with the voltage of more than 66KV is built in a luxurious building group and a residential area, and in order to avoid noise pollution, the transformer is only placed indoors or underground. Because the building space of the transformer substation occupies the expensive ground of a city, and a large fan cannot be used for heat dissipation of the transformer, how to improve the efficiency of the radiator, reduce the occupied space of the radiator and reduce the space and the manufacturing cost of the transformer substation is a key. At present, the power transformer mainly uses a finned radiator formed by combining a plurality of groups of steel plates. The basic structure of such a conventional finned radiator is: the steel plate is pressed into an oil outlet box, a welding bead and an oil duct, then two concave surfaces are oppositely welded into the radiator box, spot welding is carried out on the welding bead to increase the strength, an oil discharge port is radially formed in the oil collecting pipe, and two ends of the radiator box and the oil collecting pipe are welded into the radiator. Because the outside can produce the corrosion and the inside has impurity in the radiator manufacture process, must carry on inside and outside washing, pickling phosphorization or blowing sand polishing, painting inside and outside after oven drying, oven drying etc. dozens of processes, can make the finished product. After leaving the factory, the product still needs to be transported, and the mechanical property and the corrosion resistance of the product are still checked. The manufacturing process of the radiator product has more mechanical operation and manual operation, the pressing, welding and drying energy consumption is very large, and the multiple treatment of pollution emission of paint, oil, water, gas and the like is complex. The welding of the single-chip box and the oil collecting pipe is also a main reason of labor waste, the gaps between the boxes are small, the manual welding is still performed until the current industry, the working procedure time is long, the occupied area is large, the working period is long, and a large factory building is needed. The multi-row welding points on the steel finned radiating fins are connected parts pressed in the sheet box, the pressure-resistant national standard of the inner cavity of the single sheet box is 0.15MPa, and the heat radiating efficiency of the single sheet box is low, so each group of radiators generally comprises dozens of single sheets, the weight of each group reaches 0.5-1T, dozens of groups of radiators are needed for one large transformer, and thus the radiators of one large transformer consume dozens of tons of steel, and the resource waste is huge. Therefore, the existing radiator has a series of problems of high production cost, low production efficiency, more special machines, difficult industrial upgrading and transformation and the like. However, some patent publications are designed to use the characteristic of good thermal conductivity of aluminum material, and attempt to solve some problems, such as search 1, CN201110410625.1 high-frequency water-cooled transformer based on aluminum profile heat sink, in which secondary winding and center tap terminal of transformer are fixed on the aluminum profile heat sink through copper sleeve and bus plate. But the defects of the scheme are that the strength is poor and unreliable, and the use requirement of the power transformer cannot be met; 2. CN200820013962.0 power transformer is with high-efficient aluminum alloy finned radiator, aluminum alloy stretch forming becomes the plate radiator that a plurality of cooling tubes link to each other and constitute an organic whole, and its surface has the fin, is used for oil-immersed transformer oil cooling. The structure is incomplete, finished products cannot be manufactured, the practicability is not strong, and the ventilation is not good, and the heat dissipation efficiency is not high. 3. CN200420077394.2 steel aluminium composite radiator, aluminium alloy radiating fin suit are on the steel pipe of connecting the oil collecting pipe. There are other similar finned heat sink solutions: the steel radiator unit sheet box is replaced, a steel pipe is connected between the oil collecting pipes at two ends, and two aluminum fins are radially wrapped on the periphery of the steel pipe and fastened by a clamp. The document does not show how this works, and it is tried to see: two surface areas of one radiator box are replaced by a plurality of oil pipes, and the aluminum fins are only mechanically applied to the outer wall of the oil pipes and are conducted through the contact surfaces of the pipe walls and the contact and air layer conduction among the wrapping layers, so that the heat dissipation efficiency is greatly reduced, the heat conduction performance of the aluminum material is not completely utilized, and the problems in the production are not needed. The prior art does not provide a steel-aluminum radiator solution suitable for power transformers.

Disclosure of Invention

The invention aims to provide a steel-aluminum support protection type aluminum alloy heat dissipation device for an oil immersed power transformer and a manufacturing method thereof, which can realize the production mode of modularized prefabricated semi-finished products and inventory of a heat dissipation unit, realize the function of no order cycle, shorten the manufacturing cycle of the industry and innovate the existing production mode in the industry.

The steel-aluminum support protection type aluminum alloy heat dissipation device for the oil immersed power transformer comprises a carbon steel frame, a stainless steel frame and a heat radiator made of all aluminum alloy materials, wherein the carbon steel frame and the stainless steel frame are respectively combined with an aluminum alloy heat dissipation body; the radiator made of aluminum alloy section shared by radiators with five structures has the following shapes: the center is a circular tube for flowing oil, the inner wall of the circular tube is provided with an inner heat conductor, the periphery of the wall of the circular tube is radially and uniformly distributed with outward-extending wing fins, and the inner heat conductor is radially connected with some wing fins on the outer wall of the circular tube; the radiator structure I, II, III and IV is characterized in that two ends of a radiator are inserted into a steel pipe joint and welded into a whole, and the radiator is used in a steel structure supporting and protecting type aluminum alloy sheet radiator unit of carbon steel or stainless steel, or a steel structure supporting and protecting type aluminum alloy circular radiator or a steel structure supporting and protecting type aluminum alloy square frame radiator, or the radiator is used in a sheet radiator unit of a five-aluminum structure supporting and protecting type all-aluminum alloy radiator, an aluminum structure supporting and protecting type all-aluminum alloy circular radiator or an aluminum structure supporting and protecting type all-aluminum alloy square frame radiator of a structure of all aluminum alloys; one of five structures: the steel constructs and props the unit structure of the protective aluminum alloy finned radiator: the steel pipe joints at the two ends of the radiator and the two ends of the steel outer vertical frame pipes which are arranged at the outer side of the radiator side by side are welded together with the oil collecting box to form a steel-structure supporting and protecting type aluminum alloy finned radiator unit, and the oil collecting boxes of a plurality of radiator units are welded with the steel oil collecting pipe to form a group of steel-structure supporting and protecting type aluminum alloy finned radiating combiner; the second structure: the structure I is characterized in that the heat radiation body is welded with an aluminum outer vertical frame pipe which is arranged on the outer side by side and steel pipe joints at two ends respectively, and then steel oil collecting boxes are welded at two ends of the steel pipe joints; the third structure: the steel structure supports the round radiator structure of protective type aluminum alloy, the outer oil ring leads the oil ring to connect inner oil ring and form the concentric circle structure of steel through the diversion union pipe, and lead the oil ring and communicate with upper, lower oil collecting pipe outside, the steel pipe joint and two sets of concentric circle structural inner oil ring of both ends of multiple radiators, lead the oil ring to weld integrally; the fourth structure is as follows: the steel structure supports the square frame type radiator structure of the shape aluminum alloy, lead the oil frame tube to connect the inner oil frame tube to form the steel inner and outer square frame structure through the flow guiding connecting pipe outside, and lead the oil frame tube to communicate with upper, lower oil collecting pipe outside, the steel pipe joint and two sets of inner oil frame tube, outer oil frame tube of inner and outer square frame structure of both ends of multiple radiator weld as an organic whole; the fifth structure of the all aluminum alloy section bar: 5.1) aluminum structure props protection type full aluminum alloy plate radiator structure: an aluminum oil collecting box and an aluminum oil collecting pipe are welded at two ends of the heat radiator and the aluminum outer vertical frame pipe together, the end of the aluminum oil collecting pipe is welded with a flange made of superhard aluminum alloy, and a stainless steel corrugated pipe joint is only arranged at the flange to form the aluminum-supported and protected all-aluminum alloy sheet type radiator with adjustable center distance and shock absorption; 5.2) the aluminum structure props the full aluminum alloy circle formula radiator structure of protection type: the aluminum outer oil guide ring is connected with the aluminum inner oil guide ring through an aluminum diversion connecting pipe to form a concentric circle structure, the aluminum outer oil guide ring is communicated with the aluminum upper oil collecting pipe and the aluminum lower oil collecting pipe, and two ends of the plurality of heat radiators are welded with the aluminum inner oil guide ring and the aluminum outer oil guide ring of the two sets of aluminum concentric circle structures into a whole; 5.3) aluminum structure props full aluminum alloy square frame formula radiator structure of protection type: the aluminum outer oil guide frame pipe is connected with the aluminum inner oil guide frame pipe through an aluminum diversion connecting pipe to form an aluminum inner and outer frame structure, the aluminum outer oil guide frame pipe is communicated with the aluminum upper and lower oil collecting pipes, and two ends of the plurality of radiators are welded with the two sets of aluminum inner oil guide frame pipes and aluminum outer oil guide frame pipes of the aluminum inner and outer frame structure into a whole;

the manufacturing method is characterized in that the unit effective heat dissipation area of the heat dissipation unit is calculated according to an effective heat dissipation area formula in a mechanical industry standard JB/T5347-2013 to form a heat dissipation specification and heat conductivity conversion parameter, so that dozens of specifications of the heat dissipation unit are combined into a standard heat dissipation unit with only a plurality of length specifications, and the prefabricated standard heat dissipation unit is a semi-finished product and an oil collection pipe semi-finished product; the specification of the radiator and the conversion parameter of the thermal conductivity of the specification are provided for a customer to select, and then a converging box structure can be added to the steel-structure support and protection type aluminum alloy sheet type radiating unit according to the radiating power selected by the customer, the selected steel, the converted specification of JB5347-2013 and the requirement of the number of radiator groups with the number of radiating units according to the specification of a customer order and the requirement of the mechanical strength of a product; and (3) taking corresponding semi-finished products of the heat dissipation units according to an order at the beginning of processing, combining and welding the two semi-finished products into a radiator in an assembly welding process, carrying out conventional process treatment on radiators of different steels after leakage testing, and packaging and delivering the radiators together after the radiators are qualified by washing an inner cavity and testing and installing an upper induced draft cover, an unpowered fan and a lower electric fan.

The invention solves the problems of the prior art, and provides innovative technical measures for manufacturing the finned radiator, wherein the innovative technical measures are as follows: the heat dissipation power of the heat dissipation device with various forms manufactured by the technical measure is increased by about 4.85 times compared with that of the existing finned heat dissipater, so that the number of fins of each group of heat dissipaters is greatly reduced, the center distance heat dissipation power of the existing heat dissipaters is also greatly reduced after matching, and the selected specification is more concentrated. A client selects the radiator heat dissipation power used by the current transformer capacity according to the chart, namely, only a plurality of specifications are used, so that the unit piece semi-finished products and the oil collecting pipe semi-finished products in the radiator can be customized in a modularization mode. Under the condition of meeting the heat dissipation power required by the order, the specifications of the oil collecting pipe are few due to the fact that the specifications of units in the radiator are few. Because the finished product turnover is fast, so prefabricated semi-finished product warehouse deposit can not take place the overstock waste and also can satisfy the order in time.

The heat dissipation power of the required heat dissipation unit is calculated according to the power of the order, the number of the required heat dissipation unit chips is calculated, and a customer can determine the number of the required heat dissipation units according to the size of the transformer oil tank. The semi-finished products of the radiator unit pieces are selected to be matched with the semi-finished products of the oil collecting pipes with corresponding specifications to be welded into the radiator required by the order, the stainless steel supporting and protecting type is only required to be assembled and welded, and the radiator can be packaged after leakage testing and free from painting and washing; when the center distance of the radiating units is more than 1 meter, the intermediate confluence box is added between the two sections of the length to increase the strength, and the two sections of the radiating bodies are provided with the intermediate confluence box, so that the oil temperature in the oil cavity can be redistributed, the oil temperature distribution can be adjusted, and the radiating efficiency can be improved. And the steel plates can be reinforced between the middle confluence boxes, and the radiator unit can meet the strength of the steel-aluminum radiator with larger center distance in the manufacturing process and the using process. The installation sizes of the upper unpowered fan and the lower unpowered fan are configured according to the installation size of the radiator.

The steel frame support provided by the invention guarantees strength and three-dimensional heat dissipation of the aluminum wings, the heat-conducting body is arranged in the steel frame support, the heat-dissipating area is 3-4 times that of a steel plate fin type heat radiator, the heat conductivity of aluminum is more than 4 times that of steel, as shown in figure 40, the inner heat-conducting body is arranged on the inner wall of a central circular tube of the aluminum alloy heat radiator, the outward-extending wing wings are radially distributed on the periphery of the circular tube wall, and the heat radiator unit structure of the outer vertical frame steel support simultaneously solves the use bottleneck that the aluminum material is good in heat conductivity and poor in strength, and. Because the heat dissipation area is increased by several times, the heat conductivity difference of steel and aluminum is several times, and only two items are added, the heat dissipation efficiency can be improved by about 4.85 times compared with the prior finned radiator, the unpowered fan is arranged at the upper part of the radiator, the unpowered fan accelerates the heat dissipation of the radiator, the electric fan can be added at the bottom when more heat dissipation power is needed, because the upper part is provided with the unpowered fan, the number of the sheets and the center distance specification of the existing radiator can be greatly reduced, namely, the matching of the length specifications of several oil collecting pipes and the length specifications of several radiating units can meet the specification of the radiator selected by the current industry, therefore, a production mode of modular customization and prefabricated semi-finished products can be realized, and a customer has great space for selecting a radiator for the transformer and can save the space, so that the customer also has more preferable optional schemes to be applied to the design of the transformer. Because the production time after the order is produced is relatively extremely short, the effect of the no-order cycle can be called, and the industrial production cycle is shortened. The design advantage is that: the steel constructs and props the structure advantage of protecting type aluminum alloy plate radiator: the heat dissipation of hot oil fluid is usually mainly near the wall of the heat conducting pipe, and the heat of the oil in the inner core of the pipe is higher than that around the inner wall of the pipe. According to the design, the inner heat conductor extends out of the inner pipe wall of the oil guide pipe to the center of the pipe, oil heat at the center is directly absorbed by the inner heat conductor and is transmitted to the heat radiation body on the outer wall of the pipe, the heat close to the inner center is transmitted out in time, and the limitation that the heat is transmitted only by the pipe wall is overcome. The outer vertical frame pipe of the heat radiation unit chip adopts a steel support frame to support and protect, thereby overcoming the defect of poor strength of aluminum materialHigh weakness and can satisfy the internal oil gravity in use. The aluminum wing on the radiator needs protection, the steel frame is convenient to restore, each process handling, finished product transportation are anti-seismic, in use, anti-seismic and anti-electromagnetic-seismic force all require intensity, each steel joint is designed to be a convex corrugated pipe, the stainless steel corrugated pipe joint with the same functional design can increase anti-seismic performance, and meanwhile, the different expansion amounts of steel and aluminum at a certain temperature are adjusted. The invention also designs an outer vertical frame pipe supporting and protecting structure for the aluminum profile, improves the heat dissipation rate, reduces the weight greatly, and the plane on the outer side can be placed on the ground when stacking and installing and using in the manufacturing process. The surface area of the aluminum fin radiator designed according to the invention is significantly increased compared to the original steel and aluminum fins, e.g., the original 520-fin type (width 520mm x length 1 m) with a surface area of 1m²) The length of a single surface area/1 meter of the designed heat radiation body is 0.5m as the diameter ²5 heat dissipation bodies 2.5m²The periphery of the radiating column body in each radiating body unit is equivalent to the surface area of 3.5 times of the original steel plate radiating fin, the width of one radiating fin is replaced by the radiating body in the design, the radiating area is increased by at least 3.5 times, the design of 5-6 radiating body aluminum wing fins enables the equal radiating efficiency to be improved by more than 5 times, and the radiating area of the outer vertical frame steel pipe is not included. The outer vertical frame tube is mainly used for strength, the using and testing pressure of the integral radiator is 0.3MPa, and the condition that the bearing strength is different in style is met. Because the aluminum radiating efficiency is obviously superior to steel, the aluminum wing shape of the radiator is radiation radiating without shielding, and the radiator is more favorable for radiating than the prior flat radiating fin which only radiates on two side planes; therefore, the volume of the radiator is reduced, the number of the radiators is reduced, the center distance between the two oil collecting pipes is greatly reduced, the interval between the radiators is large, the interval of the vertical frames is also large, the heat dissipation efficiency is high, the flow rate of oil is high, the oil quantity can be increased, the sizes of the vertical frames, the cavity of the oil collecting box and the oil collecting pipes are increased, more oil can be contained, the heat dissipation efficiency is higher, the rotating condition of the unpowered fan is 0-level wind or the temperature difference between the inside of the fan barrel and the outside of the fan barrel is 3 ℃, the heat concentrated part of the radiator on the upper portion can generate rising hot air, and the radiator can push the heat-dissipating part without movingThe power fan is rotatory, and in addition natural wind in the environment more can promote the rotation when reaching more than 0 wind, and the ventilation on the heat dissipation body can be quickened in the rotation of power-free fan, and it can take more with the heat from the radiator faster to improve the ventilation, improves the self-cooling power of radiator. The specifications of the oil collecting pipes for selection are also few, and the modular production is facilitated. The upper parts of the round radiator, the square radiator and the finned radiator are provided with the unpowered fan, the bottom part of the finned radiator is provided with the electric fan, and an oil pump can be arranged on an oil pipeline communicated with the transformer at the position of the inlet flange and the outlet flange, so that the heat dissipation efficiency is higher. With the progress of the aluminum alloy section processing technology, the radiator component of the invention is completely made of aluminum sections, such as a five-structure center distance adjustable all-aluminum alloy radiator unit structure. The corrugated pipe joint is also arranged on the flange connected with the transformer oil pipe, and has the advantages that the center distance between the two oil collecting pipes of the radiator can be adjusted during installation, the expansion change of the radiator in the length direction can be compensated when the temperature changes, and the damping effect can be realized during use. The all-aluminum alloy structure shows more superiority, and the strength of the radiator can meet the requirement that the unpowered fan is arranged on the upper part of the all-aluminum radiator.

The manufacturing advantage is as follows: the method can combine the specifications of the heat radiator in the industry into a plurality of specifications from material and structure change, the semi-finished product with standard modularized manufacturing reduces the manufacturing difficulty of the heat radiator, only two ends of the heat radiator are welded with the joints of the steel pipe, and the circumferential welding of the steel and the aluminum material in the prior art is reliable, so the heat radiator is easily replaced by automatic welding. The heat radiators are spaced greatly, which is beneficial to the direct operation of the existing welding robot. The steel structure supports the round radiator of protective type aluminum alloy and square frame radiator, lead the oil ring frame to replace the oil collecting box of the finned radiator, lead the oil ring frame to have a place to weld with the oil collecting pipe only outside, than a plurality of oil collecting boxes and oil collecting pipe welding of the finned radiator, have saved a large amount of processing operations. The use of stainless steel also saves the working procedures of internal and external painting, the related treatment working procedures before and after the working procedures and the heavy equipment for manufacturing the radiator, therefore, the invention can lead the manufacturing field of the radiator to be as follows: no harmful substance, no gas emission, no production period and no heavy equipment production. The required heat dissipation efficiency of the radiator is calculated after the order is made, semi-finished products meeting the similar specifications of power are assembled and matched in a wood-gathering mode, the semi-finished products are called and then are assembled and welded, the production time from materials to semi-finished products is saved, the order of a customer can be met in a short time, and the order period of the customer is shortened. Compared with the traditional steel plate finned radiator which needs a large number of welding procedures, the energy and labor cost is obviously reduced, a large number of steel products are saved, a large number of transformer oil is also saved, the design cost is lower than that of the existing radiator by more than 20-30%, and therefore the existing production mode in the industry can be overturned.

Drawings

FIG. 1 is a shaft schematic view of a steel-structure supporting and protecting type aluminum alloy plate type heat dissipation device of the present invention;

FIG. 2 is a schematic axial view of the steel-structure supporting and protecting aluminum alloy finned radiator of the present invention;

FIG. 3 is a shaft measuring and indicating view of the steel supporting and protecting structure of the steel supporting and protecting type aluminum alloy finned radiator;

FIG. 4 is a front view of the steel-structure supporting type aluminum alloy finned radiator of FIG. 2;

FIG. 5 is a left side view of FIG. 2;

FIG. 6 is a cross-sectional view A-A of FIG. 4;

FIG. 7 is a radial cross-sectional view of an aluminum fin heat sink of the type 1a of the heat sink of FIG. 2;

FIG. 8 is a radial cross-sectional view of a type 1b aluminum fin heat sink of the heat sink of FIG. 2;

FIG. 9 is a sectional view of the heat sink 1 of FIG. 2 in axial cross-section of a c-shaped helical aluminum fin heat sink;

FIG. 10 is a radial cross-sectional view of the heat sink 1 c-type helical aluminum fin heat sink of FIG. 9;

FIGS. 11, 12 and 13 are radial cross-sectional views of a circular 3a, an oval 3b and a rectangular 3c of the steel mullion tube;

FIG. 14 is a radial cross-sectional view of the outer mullion tube 3d of the aluminum supporting and protecting structure of the radiator unit with aluminum profile fins;

FIG. 15 is an axial cross-sectional view of a corrugated steel pipe joint 7 connecting an aluminum heat sink and an oil collection box;

FIG. 16 is a perspective view of a steel oil collecting box of a radiator supporting and protecting structure;

FIG. 17 is a front view of FIG. 16;

FIG. 18 is a top view of FIG. 17;

FIG. 19 is an isometric view of the use of a long format finned heat sink and fan connected together with an intermediate header box in a heat sink unit;

FIG. 20 is a schematic axial view of the steel radiator support and guard structure of FIG. 19;

FIG. 21 is a front view of FIG. 20;

FIG. 22 is a schematic axial view of a center manifold box of a support and guard structure of a long plate radiator;

FIG. 23 is a front view of the junction box of FIG. 24;

FIG. 24 is a top, bottom elevational view of the junction box of FIG. 23;

FIG. 25 is a schematic view of an entire axial view of a long finned heat sink connected by a gooseneck oil-collecting tube and an intermediate junction box;

FIG. 26 is a schematic view of a steel-structure supporting and protecting aluminum alloy circular radiator and a fan in use;

FIG. 27 is a front view of a steel-structure supporting and protecting type aluminum alloy circular radiator;

FIG. 28 is a cross-sectional view taken along line B-B of FIG. 29, illustrating a steel-frame supported round aluminum alloy radiator;

FIG. 29 is a cross-sectional view taken along line C-C of FIG. 27 of a steel support and guard type aluminum alloy circular radiator;

FIG. 30 is an enlarged partial cross-sectional view of D of FIG. 27 showing a steel support and guard type aluminum alloy circular radiator;

FIG. 31 is an isometric view of a steel-supported and protected aluminum alloy square frame radiator of structure four;

FIG. 32 is a radial cross-sectional view of a steel-structure supporting and protecting aluminum alloy square frame type radiator in a fourth structure;

FIG. 33 is an isometric view of an aluminum structural brace type all-aluminum alloy square frame gold heat sink of structure five;

FIG. 34 is an isometric view of an aluminum structural brace type all aluminum alloy finned all radiator having structure five;

FIG. 35 is an isometric view of an aluminum structural brace type all aluminum alloy sheet heat sink of structure five;

FIG. 36 is an isometric view of an aluminum-made supported full aluminum alloy circular heat sink having the same structure as the third embodiment and made of full aluminum alloy;

FIG. 37 is a front view of an aluminum bracing and protective all-aluminum alloy finned heat sink of structure five;

FIG. 38 is a cross-sectional view E-E of FIG. 37;

FIG. 39 is an axial cross-sectional view F-F of FIG. 37;

FIG. 40 is a cross-sectional view of an aluminum oil collection tube;

FIG. 41 is an isometric view of an aluminum oil collection cartridge;

FIG. 42 is a bottom view of the aluminum sump housing of FIG. 43;

FIG. 43 is a front view of an aluminum oil collection box;

FIG. 44 is a radial cross-sectional view of an aluminum oil collection pocket;

FIG. 45 is a block diagram of a manufacturing process flow of the present invention;

fig. 46 is a comparison chart of equivalent specifications of a fin radiator with original steel sheet width B being 520mm and a steel-aluminum bracing-protecting type aluminum alloy sheet width B being 520 radiator of the invention;

FIG. 47 is a graph showing the parameters of melting point, thermal conductivity and specific heat capacity of metal materials in physical properties of materials commonly used in handbook of engineering for mechanical Engineers.

Detailed Description

The steel-aluminum support protection type aluminum alloy heat dissipation device for the oil immersed power transformer comprises a heat radiator which is made of carbon steel and stainless steel which are respectively combined with an aluminum alloy heat dissipation body and all aluminum alloy materials, and is characterized in that an unpowered fan is installed at the upper part of the heat radiator, and an electric fan is installed at the bottom of the heat radiator to form the heat dissipation device, or the heat radiator is independently used; the shape of the radiator 1 made of an aluminum alloy section material common to radiators of five structures: the oil flows in the center of the round tube, the size marked in figure 7 is used for calculating and referring to figure 40, and the data in the comparison graph of the original steel sheet width B which is 520mm sheet radiator and the steel-aluminum support type aluminum alloy sheet width B which is 520 radiator equivalent specification of the invention are shown. Referring to fig. 7-10, in a type a, the inner and outer heat conductor heat sink 1a, the circular tube has inner and outer fins and the outer circumference of the circular tube wall of the inner and outer fins is radially and uniformly distributed with outward extending fins, one fin of the outward extending fins is composed of a fin trunk and a pair of fins, the inner wall of the circular tube and some fins on the outer wall of the circular tube are radially connected to form the inner heat conductor, and the heat in the center of the tube is conducted to the outside of the tube for heat; the features distinguished from type a are: referring to fig. 7, the circular heat sink tube of the aluminum alloy profile is a heat sink 1b with a smooth inner wall; the spiral heat conductor 1c shown in fig. 8-10 is characterized by the following features: the inner wall of a round tube of the heat radiator made of the aluminum alloy section is provided with a sheet spiral axial extension. The two ends of the radiator 1 are inserted into the steel pipe joints 7 and welded into a whole, and the radiator is used in a steel structure supporting and protecting type finned radiator unit of carbon steel or stainless steel, a steel structure supporting and protecting type circular radiator or a square frame radiator. The outer diameter of the circular tube of the first, second, third and fourth radiators 1 is matched with the inner diameter of the steel tube connector 7, the steel tube connector 7 without parts in the fifth structure, and the outer diameter of the circular tube of the radiators 1 is corresponding to the hole of the aluminum oil collecting box 20.

Five structures of the radiator: the steel structure supports the protective aluminum alloy finned radiator, including the steel oil collecting pipe 6a, gooseneck oil collecting pipe 6b, steel collects the oil box 2, steel middle manifold box 8, steel outer vertical frame tube 3 or aluminum alloy section bar aluminum outer vertical frame tube 3d, steel pipe joint 7; one of the structures is as follows: the steel constructs and props the unit structure of the protective aluminum alloy finned radiator: referring to fig. 1-6, the aluminum alloy section heat sink is characterized in that two ends of an aluminum alloy section heat sink 1 are inserted into a steel pipe joint 7 and welded into a whole, and the aluminum alloy section heat sink is used in a steel structure support type aluminum alloy sheet type heat sink unit, referring to fig. 30; the steel pipe joints 7 at the two ends of the heat radiator 1, and the two ends of the steel outer mullion circular pipe 3a or the elliptical pipe 3b and the rectangular pipe 3c which are arranged at the outer side of the heat radiator 1 in parallel are welded together with the oil collecting box 2 into a whole, as shown in the figure 11-13, so that a supporting and protecting type radiator unit is formed; the second structure: the radiator 1 and the aluminum outer vertical frame pipes 3d which are arranged on the outer sides side by side are connected with a steel pipe joint 7, steel oil collecting boxes 2 are welded at two ends of the steel pipe joint 7 to form an aluminum-structure supporting and protecting type aluminum alloy radiator unit with a second structure, and the steel oil collecting boxes 2 on a plurality of radiator units are welded with steel oil collecting pipes 6 to form a group of aluminum-structure supporting and protecting type aluminum alloy finned radiators; one of the main distinctive structures is that the outer mullion tube is an aluminum outer mullion tube 3d, see fig. 14. The third structure: referring to fig. 26-30, in the steel-structure supported and protected aluminum alloy circular radiator structure, an outer oil guide ring 11 is connected with an inner oil guide ring 12 through a flow guide connecting pipe 13 to form a steel concentric circular structure, the outer oil guide ring 11 is communicated with an upper oil collecting pipe 15 and a lower oil collecting pipe 16, steel pipe joints 7 at two ends of a plurality of radiators 1 are welded with the inner oil guide ring 12 and the outer oil guide ring 11 of two sets of concentric circular structures into a whole, and oil flow communication between the oil pipes of the radiators 1 and oil inlet and outlet pipes, namely the upper oil collecting pipe 15 and the lower oil collecting pipe 16 is realized; and supporting channel steel 17 is welded on the outer walls of the upper oil collecting pipe 15 and the lower oil collecting pipe 16, a conical air duct 18 is arranged on the inner ring circumference at one end of the inner oil guiding ring 12, as shown in fig. 28, and the length of the conical air duct 18 is smaller than that of the heat radiator 1. The fourth structure is as follows: see fig. 31-33, the steel structure props and protects type aluminum alloy square frame radiator structure: the outer oil guide frame pipe 11a is connected with the inner oil guide frame pipe 12a through the flow guide connecting pipe 13 to form an inner and outer square frame pipe structure, the outer oil guide frame pipe 11a is communicated with the upper and lower

oil collecting pipes

15 and 16, the steel pipe joints 7 at two ends of the plurality of heat radiating bodies 1 are welded with the inner oil guide frame pipe 12a and the outer oil guide frame pipe 11a of the two sets of inner and outer square frame pipe structures into a whole, and oil flow communication between the oil pipe of the heat radiating bodies 1 and oil inlet and outlet pipes, namely the upper and lower

oil collecting pipes

15 and 16 is realized; and the outer walls of the upper oil collecting pipe 15 and the lower oil collecting pipe 16 are welded with supporting channel steel 17 and an inner oil guide frame pipe 12 a. The fifth structure is as follows: the aluminum structure of the all-aluminum alloy section bar supports and protects the radiator: 5.1) aluminum supporting protection type all-aluminum alloy finned radiator unit structure, see fig. 34, 35 and 37-44, the radiator 1 and the aluminum outer vertical frame tube 3d are welded with the aluminum oil collecting box 20 at two ends to form the aluminum supporting protection type all-aluminum alloy finned radiator unit, the central hole at the outer side of the aluminum converging box 20 is vertically welded with the aluminum oil collecting tube 19, the oil inlet end of the aluminum oil collecting tube 19 is firstly welded with a superhard aluminum alloy flange, the outer side of the flange is provided with a stainless steel corrugated tube joint 21 by bolts to be connected with a transformer circulating oil tube, the stainless steel corrugated tube joint 21 is only arranged at the flange, the outer side of the aluminum oil collecting tube 19 is provided with an air bleed plug or an oil bleed valve 5, see fig. 34, so as to form the all-aluminum alloy aluminum supporting protection type radiator with adjustable center distance and; 5.2) the aluminum-structure supporting and protecting type all-aluminum alloy circular radiator structure is shown in fig. 26-30 and 36, an aluminum outer oil guide ring 11 is connected with an aluminum inner oil guide ring 12 through an aluminum flow guide connecting pipe 13 to form a concentric circular structure, the aluminum outer oil guide ring 11 is communicated with aluminum upper and lower oil collecting pipes 15 and 16, and two ends of a plurality of radiators 1 are welded with the aluminum inner oil guide ring 12 and the aluminum outer oil guide ring 11 of two sets of aluminum concentric circular structures into a whole; 5.3) aluminum supporting and protecting type all-aluminum alloy square frame type radiator structures are shown in figures 31-33, an aluminum outer oil guiding frame tube 11a is connected with an aluminum inner oil guiding frame tube 12a through an aluminum flow guiding connecting tube 13 to form an aluminum inner and outer square frame tube structure, the aluminum outer oil guiding frame tube 11a is communicated with aluminum upper and lower oil collecting tubes 15 and 16, and two ends of a plurality of radiators 1 are integrally welded with the aluminum inner oil guiding frame tube 12a and the aluminum outer oil guiding frame tube 11a of the two sets of aluminum inner and outer square frame tubes. In fig. 33, the electric fan 14, the radiator 1, and the steel pipe joint 7 are the same as those in fig. 2. And in the first structure to the fifth structure, the unpowered fan is arranged on the upper part of the whole body, and the electric fan is arranged at the bottom of the whole body to form a heat dissipation device, so that the steel-aluminum support protection type aluminum alloy heat dissipation device for the oil immersed power transformer is formed.

Shape of the steel pipe joint 7, see fig. 15: the pipe end of the steel pipe joint 7 is respectively combined and welded with a round pipe of the heat radiation body 1, an aluminum outer vertical frame pipe 3b and a hole at the porous end of the oil collection box 2. The steel corrugated pipe not only adjusts the thermal expansion difference of two materials, but also increases the strength. The outer vertical frame pipe 3 is divided into two structures according to the manufacturing material, and the steel outer vertical frame pipe 3 for supporting and protecting has several shapes: referring to FIGS. 11-13, the tube cross-section can be circular 3a, elliptical 3b, or rectangular 3 c. The overall aluminum outer vertical frame tube 3d shape of the aluminum alloy section is as follows: referring to fig. 14, the center is a circular tube of the same type as the heat sink 1, the outer wall of the circular tube is provided with a half-circumference radial wing, the other half-circumference is connected with the outer edge of the circular tube to form a rectangular frame, and the inner wall of the rectangular frame and the central tube wall of the wing are provided with a support rib; when the structure II is used, the wing sides of the aluminum outer vertical frame pipes 3d are adjacent to the radiator 1, the flat edges of the rectangular frames are outside, the length specification of the steel outer vertical frame pipes 3 on the supporting and protecting type radiator unit corresponds to the radiator 1 with the steel pipe joints 7 at two ends, the length of the aluminum outer vertical frame pipes 3d is equal to that of the radiator 1, and the two ends of the aluminum outer vertical frame pipes are connected with the steel pipe joints 7. The small-sized radiator adopts an aluminum outer vertical frame tube 3 d. The aluminium outer vertical frame pipe 3d is applied to the finned radiator unit in structure five, and is different from the structure two steel structures and props the type of protection characteristic and is: the radiator 1 and the aluminum outer vertical frame tube 3d are welded with an aluminum oil collecting box 20 and an aluminum oil collecting tube 19 at two ends to form the aluminum support type all-aluminum alloy sheet radiator. The oil collecting box 2 in the first and second structures is a steel rectangular cavity, see fig. 17-19, an arc-shaped hole is formed in the middle of one side of a long edge, an arc-shaped notch is formed in the middle of a high portion and corresponds to an arc-shaped opening of the oil collecting pipe 6, a plurality of holes are formed in the other side of the high portion of the cavity, and the hole diameter and the shape correspond to the pipe diameters and the shapes of the outer vertical frame pipe 3 and the steel pipe joint 7. The steel oil collecting pipe 6 is used as a matched component and can have a plurality of specifications with different hole numbers and pipe diameters; shape of steel intermediate junction box 8: referring to fig. 22-24, the rectangular cavity with a similar shape to the steel oil collecting box 2 is characterized in that through holes are formed in two sides of the high part of the rectangular cavity, the through holes in the two sides are correspondingly connected with a steel pipe joint 7, a steel outer vertical frame circular pipe 3a or an aluminum outer vertical frame elliptical pipe 3b and an aluminum outer vertical frame rectangular pipe 3c, and the middle confluence box 8 is welded and connected into a whole by a reinforced steel plate 10; when the requirement on the use strength of the radiator is high, a middle converging box 8 can be arranged, two sides of the middle converging box 8 are connected with a steel pipe joint 7, an outer vertical frame pipe 3 and an oil collecting box 2 on the radiator to form a radiating unit, and then a plurality of radiating units are welded with an oil collecting pipe 6a or a gooseneck oil collecting pipe 6b to form the radiator. Fig. 19 and 25 show a radiator with an additional intermediate junction box 8.

The shape of the part of the steel-structure supporting and protecting type aluminum alloy circular radiator in the third structure is shown in the figures 26-30: the inner oil guide ring 12 and the outer oil guide ring 11 are annular cavities, the radial plane on one side is provided with holes for connecting the steel pipe joint 7, the outer side of the annular vertical wall of the inner oil guide ring 12 is provided with holes, the inner side and the outer side of the annular vertical wall of the outer oil guide ring 11 are provided with holes, and the aluminum heat radiator 1 and the steel pipe joint 7 in the drawings 26-30 are the same as those in the drawing 2. The shape of the part of the steel-structure supporting and protecting type aluminum alloy square frame type radiator in the structure IV is shown in figures 31 and 32: the inner oil guide frame pipe 12a and the outer oil guide frame pipe 11a are annular cavities, the radial plane on one side is provided with holes for connecting the steel pipe joints 7, the outer side of the vertical wall of the inner oil guide frame pipe 12a is provided with holes, and the inner side and the outer side of the vertical wall of the outer oil guide frame pipe 11a are provided with holes.

In the fifth structure, the shapes of parts of the aluminum-structure-support-protection type all-aluminum-alloy radiator made of all-aluminum-alloy are adopted, and are shown in the figures 33-44: 5.1) the shapes of the parts of the aluminum supporting and protecting type all-aluminum alloy finned radiator are shown in figures 34-35, and the shape of the aluminum oil collecting box 20 is characterized in that the steel oil collecting box 2 is characterized in that the rectangular outer wall is provided with parallel convex edges in the length direction, and the inner wall is provided with reinforcing ribs for connecting two sides; the outer wall of the aluminum oil collecting pipe 19 is provided with axial parallel convex ribs, the excircle of the aluminum oil collecting pipe is provided with a section tangent line forming a plane, and the aluminum oil collecting box 20 is provided with reinforcing ribs on the inner wall and an axial convex rib structure on the outer wall as shown in fig. 41-44; structure five, 5.2) the difference feature is that the aluminum structure supports the whole aluminum alloy round radiator, see fig. 26-30, 36, the upper and lower oil collecting pipes 15, 16 are also made into the same shape as the oil collecting pipe 19: the outer wall is provided with axial parallel convex edges, and the excircle is provided with a section tangent line to form a plane, as shown in fig. 34 and 40, the shapes of other parts are the same as the shape of the steel-structure supporting and protecting circular structure in the structure III, and the difference characteristic is that all parts are made of aluminum alloy; in the fifth structure, 5.3) the aluminum-structure supporting and protecting type all-aluminum alloy square-frame type radiator made of all-aluminum alloy is adopted, and the radiator is different from a steel-structure supporting and protecting type radiator, wherein an aluminum oil collecting pipe 6a or an aluminum gooseneck oil collecting pipe 6b is shown in figures 31-33 and is made of aluminum alloy materials.

The manufacturing method of the radiator comprises the following steps: the method is characterized in that the effective heat dissipation area of the unit of the radiator is calculated according to an effective heat dissipation area formula in a mechanical industry standard JB/T5347-2013, the specification of the radiator is formed by converting the effective heat dissipation area formula with a heat conductivity parameter, so that dozens of specifications of the existing radiator are combined into a standard radiator unit with only a plurality of length specifications, and a standard semi-finished product of the radiator unit and a standard semi-finished product of an oil collecting pipe are prefabricated; the standard radiator specification, effective heat dissipation area, heat conductivity conversion parameters and tested data are provided for a customer to select, the customer selects after conversion according to the heat dissipation power of the radiator unit and corresponding JB5347-2013, see figure 46, the quantity requirement and the material requirement of a radiator group with the number of the radiator units in an order are provided, a junction box structure can be additionally arranged on a steel-structure supporting and protecting type aluminum alloy sheet radiator according to the specification and the use mechanical strength requirement of the customer, the corresponding semi-finished products are taken according to the order at the beginning of processing, the semi-finished products are combined and welded into the radiator in the assembly welding process, the radiator with different steel qualities is subjected to conventional process treatment after welding leakage testing, an unpowered fan is installed after inner cavity flushing, and packaging and delivery can be carried out after inspection is qualified.

The self-cooling radiator of the invention calculates the effective radiating area according to the self-cooling (6) of the formula JB/T5347-2013 standard in the mechanical industry, taking the original radiator 520 type as an example: the heat radiator unit of the design is calculated according to the mechanical industry standard:

according to the mechanical industry standard JB/T5347-2013 Fin radiator for transformer of the people's republic of China:

8.5.3 effective heat dissipation area, for example, width 520, length 2000, and number 20

8.5.3.1 the convective heat dissipation area is calculated according to the formula (2)

2 xb 0 pieces wide spread length × H pieces height × N pieces × 10-6 ═ SD convection heat dissipation area … … (2)

2×550×2000×20×0.000001＝44

8.5.3.2 the radiation heat dissipation area is calculated according to the formula (3)

(2 × B pieces width × d pieces pitch × N pieces number + B pieces width × H pieces height) × 10-6 ═ SF radiation heat dissipation area … … (3)

(2×520×45×20+520×2000)×0.000001＝1.976

8.5.3.3 the surface coefficient (β) is divided into self-cooling type and air-cooling type, and is calculated according to the formula (4) and the formula (5):

self-cooling: (55 × SD heat convection area +45 × SF heat radiation area) ÷ (100 × SD) ═ β from … … (4)

(55×44+45×1.976)÷(100×44)＝0.570209

Air-cooled: (65 × SD convective heat dissipation area +35 × SF radiative heat dissipation area) ÷ (100 × SD) ═ β wind … … (5)

(65×44+35×1.976)÷(100×44)＝0.665718

8.5.3.4 the structure correction factor is divided into a chip pitch correction factor and a chip count correction factor. Wherein, the correction coefficient of the inter-chip distance is shown in table 1, and the correction coefficient of the number of chips is shown in table 2.

TABLE 1 chip Pitch correction factor

※

The beta inter-slice correction factor takes 0.9

TABLE 2 number of sheets correction factor

In the corresponding former text, 20 pieces are set, and the correction coefficient of k pieces _______ is 0.965

8.5.3.5 the effective heat dissipation area is calculated according to equation (6) and equation (7), respectively:

mu pitch correction factor x k number correction factor x beta self-cooling heat dissipation area (S) self-cooling heat dissipation area … (6)

TABLE 2 number of sheets correction factor

0.916×0.965×0.570209×44＝22.177

Air-cooled radiator with S air-cooled radiating area

Heat area … (7)

0.916×0.965×0.665718×44＝25.892

On the premise that the material quality is the same as the JB/T5347-2013 mechanical industry standard, the radiator is manufactured into the shape of FIG. 1, the specification takes the sheet width of 520mm, the sheet height of 2000mm and the sheet number of 7 as examples, wherein the sheet width is used for placing a 5-column radiator, and the type 1A of the radiator is shown in FIG. 6:

heat radiating area 1-8 mm × 2000mm long × 6 × 12 × 10-6-1.152 m²

The heat dissipation area 2 is 6mm multiplied by 2000mm long multiplied by 2 plane multiplied by 6 multiplied by 10-6 is 0.144m²

Geometric surface area (5 columns) ═ heat dissipation area 1+ heat dissipation area 2 x 5 columns ═ 6.48m for heat dissipation of heat sink²

Equivalent heat dissipation width is 6.48m²The heat dissipation geometric surface area (5 columns) ÷ 2 two-sided ÷ 2m piece length ÷ 1.62m piece width × 1000 ═ 1620mm of the heat dissipation body²Sheet width ÷ 1.04 coefficient ≈ 1558mm B0 unfolding sheet width

On the premise of ensuring the S self-cooling and self-cooling heat dissipation area and the S air-cooling and air-cooling heat dissipation area, the calculation formula of B0 expansion sheet width value of 1558mm (B0-30 is 1528 is B sheet width, wherein B in the sheet spacing correction value is still 520mm) is substituted into the calculation formula of 8.5.3 effective heat dissipation areas (2) to (7) in JB/T5347-2013 mechanical industry standard to obtain:

the specification of the external radiator takes the sheet width of 520mm, the sheet height of 2000mm and the sheet number of 7 as an example in figure 1, wherein the sheet width is used for placing a 5-column radiator, and the type 1A of the radiator is shown in figure 6.

Effective heat dissipation area:

0.916×0.965×0.61×41.94＝22.61

Mu pitch correction factor x k number correction factor x beta wind x SD convective heat dissipation area is S air-cooled heat dissipation area … (7)

0.916×0.965×0.69×41.94＝25.82

The calculation (the thermal conductivity and the cooling effect of the aluminum alloy and the carbon steel do not participate in the calculation) corresponds to JB/T5347-2013 mechanical industry standard 'Fin radiator for transformer', the width of the radiator is 520mm, the height of the radiator is 2000mm, and the advantages of the radiators with 20 fins are compared as follows:

under the condition that the width and the height of the chips are not changed, the number of the chips is reduced from 20 chips to 7 chips, so that the number of the chips is reduced by 2.85 times.

② the thermal conductivity ratio of aluminum to carbon steel in the design manual of mechanical engineers is

The aluminum alloy in the invention is selected by 2 times according to 40 percent.

Arranging the original steel sheet type single sheet into a whole by the heat radiator, wherein air cooling and self cooling cannot penetrate through the middle of the sheet width; the existing 5 columns of the aluminum alloy heat radiator are a whole piece, each column has a larger distance, and all the peripheries of a single column are cooled by air cooling and self-cooling energy. Therefore, the air cooling and self-cooling effects are greatly superior to those of the original steel sheet type radiator, and the effects are not included in the calculation. And (4) obtaining data after the sample is tested and then adding the data into the calculation.

The comparison of the advantages gives that: the reduction in the number of sheets by a factor of 2.85 + the increase in the thermal conductivity ratio by a factor of 2-the efficacy of the invention is increased by a factor of at least 4.85 over the prior art products, see fig. 46.

As shown in fig. 46, the steel plate width B of 520mm is compared with the steel bracing-type aluminum alloy plate width B of 520 heat sink equivalent specifications according to the above calculation data: in the modularized formula, the number of sheets N1 is N × the center distance a × the steel radiator single sheet per meter of surface area/center distance a1 × the aluminum radiator surface area × the thermal conductivity is increased by multiple times.

The heat dissipation power increased by the unpowered fan on the upper part of the heat dissipation body is not included in the calculation.

According to the example data in fig. 46, it is seen that the specifications of the main radiators used in the power transformer industry are many at present, the number of the combined radiators is 4-11, the number of the oil collecting pipes is six, the center distance of the radiators is 1000, 1400, 1800 and 2200, and the modularized production mode can be realized. If the lower part adopts air cooling, the power of a fan can be greatly reduced, the specification of the example and the specification outside the example can be further optimized by obtaining data after experiments, a larger space is provided for the design and selection of the transformer industry, the condition of crowded arrangement of the finned radiators around the transformer box body is thoroughly changed, the capacity of a single transformer can be increased, the capacity is larger, and a sufficient heat dissipation condition is provided.

The manufacturing of the semi-finished products is carried out according to the production flow chart of the manufacturing method of the invention, as shown in figure 45, and the semi-finished products of the radiator units and the oil collecting pipe with different matched specifications are respectively manufactured. Radiator units of different specifications, steel and aluminum supporting vertical frame pipes and oil collecting boxes are made into semi-finished products of radiator units, steel oil collecting pipes are made into semi-finished products, concentric circle structures, inner and outer square frame structures, middle afflux boxes and oil collecting pipes for all aluminum alloy aluminum structural sheet type, round type and square frame type radiators are made into multi-specification semi-finished products, and the multi-specification semi-finished products are stored.

A. Manufacturing a semi-finished product of the heat dissipation unit: the semi-finished products before assembly welding are respectively manufactured by carbon steel and stainless steel, the steel joint 7 is welded with the two ends of the radiator 1, then is aligned with the two ends of the steel vertical frame tube 3a side by side and is welded with the steel oil collecting box 2 into a supporting and protecting type radiator unit. Or, see fig. 11 aluminum vertical frame tube 3b, the two ends of the heat sink 1 and aluminum vertical frame tube 3d are both provided with steel pipe joints 7, and then are welded with the steel oil collecting boxes 2 at the two ends into a radiator unit, and the radiator unit can manufacture semi-finished products of the same general specification according to the probability of customer requirements; when the supporting and protecting type radiator unit is a steel outer vertical frame pipe 3a, a steel pipe joint 7 is not arranged. When the aluminum outer vertical frame tube 3d is used for supporting and protection, the half circumference of the finned tube is parallel to other heat sinks 1, and the tube wall of the rectangular frame is outward. When the specification length of the radiator is smaller, the aluminum section bar outer vertical frame pipe can be selected, the overall weight of the radiator is reduced, the cost is reduced, and the radiating efficiency is improved. When the specification and length of the radiator are larger or the strength is specially required by a client, a middle converging box 8 can be added, the two sides of the middle converging box are connected with a central tube of the radiator 1, an outer vertical frame tube 3, an oil collecting box 2 and an oil collecting tube 6, and the radiators with the same specification or multiple specifications are combined into a whole; see fig. 19-21, 25, or radiators with the same specification, which are respectively connected at two ends of the middle manifold box 8, and then welded with the oil collecting box 2 and the oil collecting pipe 6 at the other end to form a radiator with a larger specification and a larger length;

B. manufacturing a semi-finished product of the oil collecting pipe: respectively manufacturing semi-finished products before assembly welding according to carbon steel and stainless steel, manufacturing an oil collecting pipe 6 and an oil collecting box 2, wherein holes with the same number as that of the oil collecting boxes 2 of the radiator units are formed in the oil collecting pipe 6, the aperture size of the holes is required to ensure the oil flow matched with the oil flow required by the radiator, and an oil (gas) discharge valve 5 is arranged at one end of the outer side of an oil collecting pipe 6a in the figure 2;

C. manufacturing a semi-finished product of the steel-structure supporting and protecting type aluminum alloy circular radiator: the inner oil guide ring 11, the outer oil guide ring 12 and the flow guide connecting pipe 13 are respectively manufactured into semi-finished products with several specifications before assembly welding according to carbon steel and stainless steel;

D. manufacturing a semi-finished product of the steel-structure supporting and protecting type aluminum alloy square frame type radiator: the steel inner and outer oil guide frame pipes 11a and 12b are respectively manufactured into a plurality of matched specifications, the flow guide connecting pipe 13 is used as a part, and semi-finished products before assembly welding are respectively manufactured according to carbon steel and stainless steel;

E. manufacturing five semi-finished products of the structure: the difference of the structure I, the structure II, the structure III and the structure IV is that the joint 7 without the steel pipe and the middle converging box 8 are made of aluminum alloy to form a semi-finished product before assembly. See fig. 45, the required number of each type of semi-finished product is calculated according to the customer order requirements: after the semi-finished products are dispatched to a workshop machine from the stock, the heat radiation body unit and the oil collecting pipe are assembled and welded, and a steel structure support type aluminum alloy finned radiator with a structure is assembled and welded according to the order requirement, as shown in figures 2 and 3; the three-steel-structure supporting and protecting type aluminum alloy round radiator in the structure is shown in figures 27-29, the four-steel-structure supporting and protecting type aluminum alloy square frame radiator in the structure is shown in figures 31-33, and after assembly welding, leakage testing and inner cavity washing are carried out, and then surface anti-corrosion treatment is carried out on the radiator according to material surface treatment specifications. The structure V is made of aluminum alloy and is shown in figures 33-44; the aluminum inner and outer oil guide rings 12 and 11 in the aluminum supporting and protecting type all-aluminum alloy circular radiator are in annular concentric circular structures with different sizes and the same shape, an aluminum flow guide connecting pipe 13, an aluminum inner oil guide frame pipe 12a, an aluminum outer oil guide frame pipe 11a, aluminum upper and lower

oil collecting pipes

15 and 16 and an aluminum oil collecting pipe 19 are in the same shape, and the aluminum supporting and protecting type aluminum alloy plate radiator is structurally characterized by comprising a second aluminum supporting and protecting type aluminum alloy plate radiator, as shown in figure 2, and an aluminum supporting and protecting type aluminum outer vertical frame pipe 3 d;

F. processing sequence after receiving order: the combined welding determines a corresponding process route according to the requirements of customer orders and different steel qualities: selecting steel which is carbon steel or stainless steel according to an order, matching the specification and the number of aluminum radiator units and an oil collecting pipe semi-finished product with a corresponding aperture according to the specification and the number of groups of customer orders, transferring the semi-finished product from inventory to a workshop machine, performing combined welding on the finned radiator units and the oil collecting pipe, and performing assembled welding on a plurality of radiator units to form a group of supporting and protecting aluminum alloy finned radiators according to the specification and strength requirements of the customer orders, wherein a confluence box structure can be added on the steel-structured supporting and protecting aluminum alloy finned radiators; after assembly welding is finished, surface corrosion prevention treatment is carried out on the carbon steel radiator according to the industry standard after leakage testing is carried out, and the upper induced draft cover 23, the unpowered fan 22 and the lower electric fan 14 are subjected to trial assembly and then packaged for delivery;

G. the finned radiator unit, the oil collecting box and the flow converging box are made of stainless steel, and the processing procedures are as follows: according to the requirement of the customer order specification strength, a converging box can be added to the steel structure supporting and protecting type aluminum alloy finned radiator, and according to the stainless steel material and the process route: transferring the semi-finished product from the stock to a workshop machine, combining and welding the semi-finished product into a radiator, and then performing inner cavity leakage test, washing and checking to obtain a qualified finished product;

H. a steel structure supporting type aluminum alloy circular radiator is characterized in that semi-finished inner and outer oil guide rings 12 and 11 and a flow guide connecting pipe 13 are spliced and welded into a concentric circular structure according to the specification of an order, surface process treatment is carried out according to required materials, and then the radiator is welded with a steel pipe joint 7 of a radiator 1 and used as outer walls of an upper oil collecting pipe 15 and a lower oil collecting pipe 16 to be welded with supporting groove steel 17 for supporting; the structure five aluminum structure support protection type all-aluminum alloy circular radiator is characterized in that semi-finished aluminum inner and outer oil guide rings 12 and 11 and an aluminum flow guide connecting pipe 13 are spliced and welded into a concentric circular structure according to the specification of an order, then the semi-finished aluminum inner and outer oil guide rings are subjected to process treatment according to required materials, and then the semi-finished aluminum inner and outer oil guide rings are welded with a radiator 1 and the aluminum inner and outer oil guide rings 12 and 11 to be used as the outer walls of an upper oil collecting pipe 19 and a lower oil collecting pipe 19 to be welded with support protection groove steel 17;

I. the steel constructs and props the square frame radiator of protection type aluminum alloy: the semi-finished inner and outer oil guide frames 12a and 11a and the guide connecting pipe 13 are spliced and welded into an inner and outer square frame structure according to the specification of an order, then the process treatment is carried out according to the required material, and then the semi-finished inner and outer oil guide frames are welded with the steel pipe joint 7 of the heat radiator 1 and used as the outer walls of the upper and lower oil collecting pipes 15 and 16 to be welded with supporting channel steel 17 for supporting; a five-structure aluminum supporting and protecting type all-aluminum alloy square frame type radiator is characterized in that semi-finished aluminum inner and outer oil guide frames 12a and 11a and an aluminum flow guide connecting pipe 13 part are spliced and welded into an inner and outer square frame structure according to the specification of an order, then the semi-finished aluminum inner and outer oil guide frames are subjected to process treatment according to required materials, then the semi-finished aluminum inner and outer oil guide frames are welded with the aluminum inner and outer oil guide frames 12a and 11a of a radiator 1, and supporting and protecting channel steel 17 is welded on the outer walls of upper and lower oil collecting pipes 15 and 16. In the figure 2, 4, 19, 25 the whole radiator product has the external surface vertical to the vertical side pipe and its diagonal line connected with the reinforcement steel bar 4, which has the reinforcement function to the whole radiator, if the whole radiator uses the middle confluence box 8, the confluence box 8 is welded and reinforced by the reinforcement steel plate 10, making each confluence box become a whole.

Claims

1. A steel-aluminum support protection type aluminum alloy heat dissipation device for an oil immersed power transformer comprises a carbon steel frame, a stainless steel frame and a heat radiator made of all aluminum alloy materials, wherein the carbon steel frame and the stainless steel frame are respectively combined with the aluminum alloy heat dissipation body; the radiator made of aluminum alloy section shared by radiators with five structures has the following shapes: the center is a circular tube for flowing oil, the inner wall of the circular tube is provided with an inner heat conductor, the periphery of the wall of the circular tube is radially and uniformly distributed with outward-extending wing fins, and the inner heat conductor is radially connected with some wing fins on the outer wall of the circular tube; two ends of a first radiator structure, a second radiator structure, a third radiator structure and a fourth radiator structure (1) are inserted into steel pipe joints (7) and are welded into a whole, and the radiator structures are used in a steel structure supporting and protecting type aluminum alloy finned radiator unit of carbon steel or stainless steel, or used in a steel structure supporting and protecting type aluminum alloy circular radiator and a steel structure supporting and protecting type aluminum alloy square frame radiator, or used in a finned radiator unit, an aluminum structure supporting and protecting type all-aluminum alloy circular radiator and an aluminum structure supporting and protecting type all-aluminum alloy square frame radiator of a five-aluminum structure supporting and protecting type all-aluminum alloy radiator of all aluminum alloys; one of five structures: the steel constructs and props the unit structure of the protective plate type aluminum alloy radiator: the steel pipe joints (7) at the two ends of the radiator (1) and the two ends of the steel outer vertical frame pipe (3) which is arranged at the outer side of the radiator (1) side by side are welded together with the oil collecting box (2) to form a steel-structure supporting and protecting type aluminum alloy finned radiator unit, and the oil collecting boxes (2) of a plurality of radiator units are welded with steel oil collecting pipes (6a) to form a group of steel-structure supporting and protecting type aluminum alloy finned radiators; the second structure: the structure is characterized in that the heat radiation body (1) is welded with an aluminum outer vertical frame pipe (3d) arranged on the outer side by side and steel pipe joints (7) at two ends respectively, and then steel oil collecting boxes (2) are welded at two ends of the steel pipe joints (7); the third structure: the steel-structure supporting and protecting type aluminum alloy circular radiator structure is characterized in that an outer oil guide ring (11) is connected with an inner oil guide ring (12) through a flow guide connecting pipe (13) to form a steel concentric circular structure, the outer oil guide ring (11) is communicated with an upper oil collecting pipe (15) and a lower oil collecting pipe (16), and steel pipe joints (7) at two ends of a plurality of radiators (1) are welded with the inner oil guide ring (12) and the outer oil guide ring (11) of two sets of concentric circular structures into a whole; the fourth structure is as follows: the steel structure supports the square frame type radiator structure of the protective type aluminum alloy, lead the oil frame tube (11a) and connect the inner oil frame tube (12a) and form the steel inside and outside square frame structure through the diversion union coupling (13) outside, and lead the oil frame tube (11a) and connect with upper and lower oil collecting pipe (15, 16) outside, the steel pipe joint (7) and two sets of inside and outside square frame structural inner oil frame tube (12a), lead the oil frame tube (11a) to weld as an organic whole outside and outside of both ends of a plurality of radiators 1; the fifth structure of the all aluminum alloy section bar: 5.1) aluminum structure props protection type full aluminum alloy plate radiator structure: an aluminum confluence box (20) and an aluminum oil collecting pipe (19) are welded at two ends of the heat radiator (1) and the aluminum outer vertical frame pipe (3b), a flange made of superhard aluminum alloy is welded at the end of the aluminum oil collecting pipe (19), and a stainless steel corrugated pipe joint (21) is only installed at the flange to form the aluminum-structure supporting and protecting type all-aluminum alloy sheet type radiator with adjustable center distance and shock absorption; 5.2) the aluminum structure props the full aluminum alloy circle formula radiator structure of protection type: the aluminum outer oil guide ring (11) is connected with the aluminum inner oil guide ring (12) through an aluminum diversion connecting pipe (13) to form a concentric circle structure, the aluminum outer oil guide ring (11) is communicated with the aluminum upper oil collecting pipe and the aluminum lower oil collecting pipe (15 and 16), and two ends of a plurality of radiators (1) are welded with two sets of aluminum inner oil guide rings (12) and two sets of aluminum outer oil guide rings (11) which are in the aluminum concentric circle structure into a whole; 5.3) aluminum support and protection type all-aluminum alloy square frame type radiator structure: the aluminum outer oil guide frame pipe (11a) is connected with the aluminum inner oil guide frame pipe (12a) through an aluminum flow guide connecting pipe (13) to form an aluminum inner and outer square frame structure, the aluminum outer oil guide frame pipe (11a) is communicated with the aluminum upper and lower oil collecting pipes (15 and 16), and two ends of the plurality of heat radiators 1 are welded with the aluminum inner oil guide frame pipe (12a) and the aluminum outer oil guide frame pipe (11a) of the aluminum inner and outer square frame structure into a whole.

2. The steel-aluminum supporting and protecting type aluminum alloy heat dissipation device for the oil immersed power transformer as recited in claim 1, wherein the shape of the heat dissipation body (1) made of aluminum alloy section on the supporting and protecting type heat dissipation device is as follows: the center of the heat radiation body (1) is a circular tube for flowing oil, outward extending wing fins are radially and uniformly distributed on the periphery of the circular tube wall, and one wing fin consists of a wing stem and a pair of feather fins; the difference characteristic is that the inner wall of a round tube of the heat radiation body (1a) with inner and outer wings is provided with a centripetal inner heat conductor which is integrated with the inner wall, and the inner heat conductor is in a thorn shape and is radially connected with some wings on the outer wall of the round tube; the heat dissipation body (1b) with the smooth inner wall of the circular tube is characterized in that: the inner wall of the round tube is smooth; the spiral fin radiator (1c) is characterized by being different from the radiator (1a) in that: the inner wall of the circular tube is provided with a sheet spiral axial extension; the outer diameter of the round pipe of the radiator (1) is matched with the inner hole diameter of the steel pipe joint (7), and the outer diameter of the round pipe of the radiator (1) in the fifth structure corresponds to the hole of the aluminum oil collecting box (20).

3. The steel-aluminum supporting and protecting type aluminum alloy heat dissipation device for the oil immersed power transformer according to claim 1, wherein the shapes of parts on the supporting and protecting type heat dissipation unit are as follows: A. the steel pipe joint (7) is a steel corrugated pipe with a section of circular diameter, two ends are flat, the middle part protrudes outwards to form a ring shape, and the pipe ends are respectively combined and welded with the circular pipe of the heat radiation body (1), the aluminum outer vertical frame pipe (3d) and the holes at the porous end of the steel oil collecting box (2); B. the first and second middle steel oil collecting boxes (2) are steel rectangular cavities, arc-shaped holes are formed in the middle of one long side, so that arc-shaped gaps are formed in the middle of the high portion and correspond to arc-shaped openings of a steel oil collecting pipe (6a) and a gooseneck oil collecting pipe (6b), a plurality of holes are formed in the other side of the high portion of the cavity, and the hole diameter and the shape correspond to the pipe diameters and the shapes of an outer vertical frame pipe (3) and a steel pipe joint (7); C. the aluminum oil collecting box (20) in the fifth structure is different from the steel oil collecting box (2), the rectangular outer wall is provided with parallel convex edges in the length direction, the inner wall is provided with reinforcing ribs for connecting two sides, and the aluminum oil collecting box is made into a ring shape which is the same as the inner and outer oil guide rings (12 and 11) of the third structure and a square frame shape which is the same as the inner and outer oil guide frame pipes (12a and 11 a); the outer wall of the aluminum oil collecting pipe (19) is provided with axial parallel convex edges, the excircle of the aluminum oil collecting pipe is provided with a section tangent line to form a plane, the end of the aluminum oil collecting pipe (19) is firstly welded with a superhard aluminum alloy flange, and the outer side of the flange is connected with a transformer circulating oil pipe through a bolt-mounted corrugated pipe joint (21); the upper and lower oil collecting pipes (15, 16) of the five-circle and square radiators are also made into an aluminum oil collecting pipe (19) with the outer wall provided with axial parallel convex edges and the excircle provided with a section tangent line to form a plane; D. the shape of the middle converging box (8) of the first steel-aluminum support protective type aluminum alloy finned radiator structure and the second steel structure: the oil collecting box is a rectangular cavity with a shape similar to that of the oil collecting box (2), through holes are arranged on two sides of the high part of the oil collecting box, the two side holes are correspondingly connected with a steel pipe joint (7), and the outer vertical frame pipe (3) is a steel pipe or an aluminum outer vertical frame pipe (3 d); when the requirement on the use strength of the radiator is high, an intermediate manifold box (8) can be arranged, and the intermediate manifold boxes (8) are welded and connected into a whole by a reinforcing plate (10); the two sides of the middle converging box (8) are connected with a steel pipe joint pipe (7) on the radiator, the outer vertical frame pipe (3) and the steel oil collecting box (2) to form a fin type radiating unit, and then the fin type radiating unit is welded with the oil collecting pipes (6a and 6b) to form the radiator.

4. The steel-aluminum support-protection type aluminum alloy heat dissipation device for the oil immersed power transformer according to claim 1, wherein the length specification of the outer vertical frame tube (3) is divided according to manufacturing materials: the length of the steel outer vertical frame pipe (3a) corresponds to that of the heat radiation body (1) with steel pipe joints (7) at two ends, and the length of the aluminum outer vertical frame pipe (3d) is equal to that of the heat radiation body (1); the steel outer vertical frame pipe (3) comprises a steel pipe with a circular (3a), oval (3b) or rectangular (3c) section; shape of aluminum outer vertical frame tube (3 d): the center is a round tube with the same shape as the radiator (1), the outer wall of the round tube is provided with a radial radiating wing of a half circle, the other half circle is one time of the parallel extension radius of the tangent line along the outer edge of the round tube, the parallel tangent lines are vertically connected in opposite directions to form a rectangular frame, and the inner wall of the rectangular frame and the outer wall of the center of the wing are provided with supporting ribs.

5. The steel-aluminum supporting and protecting type aluminum alloy heat dissipation device for the oil immersed power transformer according to claim 1, wherein a steel-aluminum supporting and protecting type aluminum alloy round heat dissipation device of a third structure is characterized in that: the inner oil guide ring (12) and the outer oil guide ring (11) are annular cavities, the radial plane on one side is provided with holes for connecting the steel pipe joint (7), the outer side of the annular vertical wall of the inner oil guide ring (12) is provided with holes, the inner side and the outer side of the annular vertical wall of the outer oil guide ring (11) are provided with holes, and the flow guide connecting pipe (13) is connected with the side holes of the annular vertical walls of the inner oil guide ring (12) and the outer oil guide ring (11) to form a concentric circular structure; the radiator is welded with two sets of inner and outer oil guide rings (12, 11) with concentric circle structures into a whole, and the outer oil guide ring (11) is connected with upper and lower oil collecting pipes (15, 16) to realize the oil flow communication between the oil pipe of the radiator (1) and the oil inlet and outlet pipes; the circular radiator structure welded into a whole is characterized in that supporting and protecting channel steel (17) supporting and protecting are welded on the outer walls of upper and lower oil collecting pipes (15 and 16), a conical air guide cylinder (18) is arranged on the inner ring circumference at one end of an inner oil guide ring (12), and the length of the conical air guide cylinder (18) is smaller than that of the radiator (1);

the fourth structure is as follows: the steel constructs and props the square frame radiator structure of protection type aluminum alloy: the outer oil guide frame pipe (11a) is connected with the inner oil guide frame pipe (12a) through a flow guide connecting pipe (13) to form an inner and outer square frame structure, the outer oil guide frame pipe (11a) is communicated with the upper and lower oil collecting pipes (15 and 16), the outer wall of the outer oil guide frame pipe is welded with a supporting channel steel (17) to support, and the steel pipe joints 7 at two ends of the plurality of heat radiators 1 are welded with the inner oil guide frame pipe (12a) and the outer oil guide frame pipe (11a) of the two sets of inner and outer square frame structures into a whole.

6. The steel-aluminum bracing-protecting type aluminum alloy heat dissipation device for the oil immersed power transformer according to claim 1, wherein the aluminum bracing-protecting type aluminum alloy heat dissipater is of a five-aluminum alloy section structure, 5.1) the aluminum bracing-protecting type aluminum alloy finned heat dissipater unit structure is of an aluminum bracing-protecting type all-aluminum alloy finned heat dissipater unit structure, an aluminum oil collection box (20) is welded at two ends of the heat dissipater (1) together with an aluminum outer vertical frame tube (3d) to form an aluminum bracing-protecting type all-aluminum alloy finned heat dissipater unit, the aluminum oil collection tube (19) is vertically welded with the aluminum oil collection tube (19), a flange made of superhard aluminum alloy is welded at the oil inlet end of the aluminum oil collection tube (19), a stainless steel corrugated tube joint (21) is only installed at the flange to form an aluminum bracing-protecting type all; 5.2) an aluminum supporting and protecting type all-aluminum alloy circular radiator structure, wherein an aluminum outer oil guide ring (11) is connected with an aluminum inner oil guide ring (12) through an aluminum diversion connecting pipe (13) to form a concentric circular structure, the aluminum outer oil guide ring (11) is communicated with aluminum upper and lower oil collecting pipes (15 and 16), and two ends of a plurality of radiators (1) are welded with two sets of aluminum inner oil guide rings (12) with aluminum concentric circular structures and the aluminum outer oil guide ring (11) into a whole; 5.3) aluminum structure props protection type all aluminum alloy square frame radiator structure, aluminium outer oil guide frame pipe (11a) connect aluminium inner oil guide frame pipe (12a) through aluminium water conservancy diversion connecting pipe (13) and constitute aluminium inside and outside square frame structure, and aluminium outer oil guide frame pipe (11a) communicate with each other with aluminium upper and lower oil collecting pipe (15, 16), a plurality of radiators (1) both ends with two sets of aluminium inside and outside square frame structure lead oil guide frame pipe (12a), aluminium outer oil guide frame pipe (11a) weld as an organic whole.

7. A manufacturing method of the steel-aluminum support protection type aluminum alloy heat dissipation device for the oil immersed power transformer as recited in claim 1, is characterized in that the effective heat dissipation area of the unit of the heat dissipation device is firstly calculated according to the effective heat dissipation area formula in the mechanical industry standard JB/T5347-2013, the conversion parameters of the specification and the heat conductivity of the heat dissipation device are formed, so that dozens of specifications of the heat dissipation device are combined into the heat dissipation device unit with the specification of only a few lengths, and the semi-finished products of the heat dissipation device unit and the oil collection pipe with the specification are prefabricated; the specification of the radiator and the conversion parameter of the thermal conductivity of the specification are provided for a customer to select, and then according to the heat dissipation parameter selected by the customer, the specification of the selected steel after JB5347-2013 conversion and the requirement of the number of radiator groups with the number of radiator units, a confluence box structure can be added to the steel-structure support protection type aluminum alloy fin type radiator according to the specification and the strength requirement of a customer order; and (4) taking corresponding semi-finished products according to an order at the beginning of processing, combining and welding the two semi-finished products into a radiator in an assembly welding process, carrying out conventional process treatment on radiators of different steels after leakage testing, and packaging and delivering after the radiators are washed to be qualified by inner cavities.

8. The manufacturing method of the steel-aluminum supporting type aluminum alloy heat dissipation device for the oil immersed power transformer according to claim 7, wherein a semi-finished product of the finned heat dissipation unit can be manufactured in advance, and the processing sequence is as follows:

radiator units semi-finished products made of radiator bodies, steel and aluminum supporting vertical frame pipes and oil collecting boxes of different specifications and matched semi-finished products made of steel oil collecting pipes, multi-specification semi-finished products made of all aluminum alloy aluminum component pieces, concentric circle structures, inner and outer square frame structures, middle afflux boxes and oil collecting pipes for all-aluminum alloy radiator units, all-aluminum alloy radiator units and all-aluminum alloy radiator units for all-aluminum radiator units for all;

A. two ends of the heat radiation body (1) are welded with the steel pipe joints (7) firstly, and then are welded with the steel vertical frame (3a) and the steel oil collecting boxes (2) at two ends into a supporting and protecting type heat radiator unit, or two ends of the heat radiation body (1) and the aluminum outer vertical frame pipe (3b) are welded with the steel pipe joints (7) and then are welded with the steel oil collecting boxes (2) at two ends into a heat radiator unit; when the specification and length of the radiator are larger or the strength is specially required by a client, a middle converging box 8 can be added, the two sides of the middle converging box are connected with a central tube of the radiator 1, an outer vertical frame tube 3, an oil collecting box 2 and an oil collecting tube 6, and the radiators with the same specification or multiple specifications are combined into a whole; the radiator unit can manufacture semi-finished products with the same general specification as a storage according to the probability of customer requirements;

B. manufacturing a semi-finished product of the oil collecting pipe: holes which have the same quantity and the same size as the oil collecting boxes (2) of the finned radiator units are manufactured on the steel oil collecting pipe (6);

C. manufacturing a semi-finished product of the steel-structure supporting and protecting type aluminum alloy circular radiator: manufacturing steel inner and outer oil guide rings (12, 11) with various specifications and a steel guide connecting pipe (13) for connecting the inner and outer oil guide rings, and respectively manufacturing semi-finished products before assembly welding according to carbon steel and stainless steel;

D. manufacturing a semi-finished product of the steel-structure supporting and protecting type aluminum alloy square frame type radiator: the inner and outer oil guide frame pipes (12a, 11a) made of steel are respectively manufactured into a plurality of matched specifications, the flow guide connecting pipe (13) is used as a part, and semi-finished products before assembly welding are respectively manufactured according to carbon steel and stainless steel;

E. manufacturing a structural five-aluminum-structure supporting and protecting type all-aluminum alloy circular radiator semi-finished product: the aluminum inner and outer oil guide rings (12, 11) are in annular concentric circle structures with different sizes and the same shape, the aluminum flow guide connecting pipe (13), the aluminum inner oil guide frame pipe (12a), the aluminum outer oil guide frame pipe (11a), the aluminum upper and lower oil collecting pipes (15, 16), the aluminum oil collecting pipe (6a) or the gooseneck oil collecting pipe (6b) have the same inner wall with the aluminum oil collecting pipe (19) and are provided with reinforcing ribs, and the outer wall is provided with an axial convex edge structure.

9. The manufacturing method of the steel-aluminum supporting type aluminum alloy heat dissipation device for the oil immersed power transformer according to claim 7, characterized in that:

F. processing sequence after receiving order: the combined welding determines corresponding process routes according to different steel qualities according to the requirements of customer orders: selecting steel which is carbon steel or stainless steel according to an order, matching the specification and the number of aluminum radiator units and an oil collecting pipe semi-finished product with a corresponding aperture according to the specification and the number of groups of customer orders, transferring the semi-finished product from inventory to a workshop machine, performing combined welding on the finned radiator units and the oil collecting pipe, and performing assembled welding on a plurality of radiator units to form a group of supporting and protecting aluminum alloy finned radiators according to the specification and strength requirements of the customer orders, wherein a confluence box structure can be added on the steel-structured supporting and protecting aluminum alloy finned radiators; after assembly welding is finished, surface corrosion prevention treatment is carried out on the carbon steel radiator according to the industry standard after leakage testing, and the upper induced draft cover (23), the unpowered fan (22) and the lower electric fan (14) are subjected to trial assembly and then packaged for delivery;

G. the finned radiator unit, the oil collecting box and the flow converging box are made of stainless steel, and the processing procedures are as follows: according to the strength requirement of the customer order specification, a converging box can be additionally arranged on the steel-structure supporting and protecting type aluminum alloy finned radiator, and according to the stainless steel material and the process route: transferring the semi-finished product from the stock to a workshop machine, combining and welding the semi-finished product into a radiator, performing inner cavity leakage test, washing and inspecting to obtain a finished product;

H. a steel structure supporting and protecting type aluminum alloy circular radiator is characterized in that semi-finished inner and outer oil guide rings (12 and 11) and a flow guide connecting pipe (13) are spliced and welded into a concentric circular structure according to the specification of an order, surface process treatment is carried out according to required materials, and then the radiator is welded with a steel pipe joint (7) of a radiator (1) and used as the outer walls of an upper oil collecting pipe (15) and a lower oil collecting pipe (16) to be welded with supporting and protecting channel steel (17) for supporting and protecting; the five-structure aluminum supporting and protecting type all-aluminum alloy circular radiator is characterized in that semi-finished aluminum inner and outer oil guide rings (12 and 11) and an aluminum flow guide connecting pipe (13) are spliced and welded into a concentric circular structure according to the specification of an order, then the semi-finished aluminum inner and outer oil guide rings are subjected to process treatment according to required materials, and then the semi-finished aluminum inner and outer oil guide rings are welded with a radiator (1) and the aluminum inner and outer oil guide rings (12 and 11) to serve as the outer walls of an upper oil collecting pipe (19) and a lower oil collecting pipe (19) to be welded with supporting and protecting;

I. the steel constructs and props the square frame radiator of protection type aluminum alloy: the semi-finished inner and outer oil guide frames (12a, 11a) and the flow guide connecting pipe (13) are spliced and welded into an inner and outer square frame structure according to the specification of an order, then the semi-finished inner and outer square frame structure is subjected to process treatment according to required materials, and then the semi-finished inner and outer oil guide frames are welded with a steel pipe joint (7) of a radiator (1) and used as the outer walls of upper and lower oil collecting pipes (15, 16) to be welded with a supporting channel steel (17) for supporting and protecting; a five-structure aluminum supporting and protecting type all-aluminum alloy square frame type radiator is characterized in that semi-finished aluminum inner and outer oil guide frames (12a and 11a) and an aluminum flow guide connecting pipe (13) are spliced and welded into an inner and outer square frame structure according to the specification of an order, then the semi-finished aluminum inner and outer oil guide frames are subjected to process treatment according to required materials, then the semi-finished aluminum inner and outer oil guide frames are welded with the aluminum inner and outer oil guide frames (12a and 11a) of a radiator (1), and supporting channel steel (17) is welded on the outer walls of upper and lower oil collecting pipes (15 and 16).

10. The manufacturing method of the steel-aluminum supporting type aluminum alloy heat dissipation device for the oil immersed power transformer according to claim 7, characterized in that: the outer walls of the confluence boxes (8) welded with the steel pipe joints (7) of the finned radiator units are welded by a reinforced steel plate (10) to connect the confluence boxes into a whole, and the peripheries of the radiator and the confluence boxes can be welded into a whole by steel plates or steel bars (4) from the width direction and the diagonal direction, so that the steel structure supporting and protecting body is further reinforced integrally.