Double-flow air cooler

Abstract

The utility model discloses a double-flow air cooler which comprises a main body frame, an upper oil collecting box is fixed above the main body frame, a lower oil collecting box is fixed below the main body frame, stainless steel cooling pipes which are arranged side by side are arranged in the main body frame, and the stainless steel cooling pipes are communicated with the upper oil collecting box and the lower oil collecting box. A plurality of aluminum magnesium alloy fins are fixed on the outer side of the stainless steel cooling pipe, a spoiler is arranged in the stainless steel cooling pipe, and a pass partition plate is arranged in the middle of the interior of the lower oil collecting box, so that a cooling liquid path of the cooler is in a U shape, the heat dissipation path length of cooling liquid is increased, and the heat dissipation effect is better; by designing the turbulent flow piece located in the stainless steel cooling pipe, the transformer oil achieves the turbulent flow effect when passing through the stainless steel cooling pipe, so that the heat exchange efficiency of the transformer oil in the cooling pipe is improved, the heat exchange area of the cooler in unit volume is increased, the wind resistance outside the pipe is reduced, and the total heat exchange amount is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of air coolers, in particular to a double-flow air cooler. BACKGROUND

[0002] China is vast in territory, spans multiple temperature zones and dry and humid regions, and has complex and diverse climate, and corrosion environment is various. In order to meet the 30-40 year service life requirement of ultrahigh voltage, extra-high voltage AC / DC transformer, efficient, high corrosion resistant air cooler needs to be adapted.

[0003] At present, the main heat dissipation element of the transformer air cooler is pipe and the outer fin, and their combination modes are: carbon steel + aluminum fin, carbon steel pipe + carbon steel fin, aluminum pipe + aluminum fin, and stainless steel pipe + carbon steel fin. The carbon steel pipe + aluminum fin has poor corrosion resistance, the carbon steel pipe + carbon steel fin has poor corrosion resistance of both pipe and fin, and the carbon steel fin is heavy, the aluminum pipe + aluminum fin has very poor corrosion resistance due to the softness of the aluminum pipe, and the stainless steel pipe + carbon steel fin improves the corrosion resistance of the pipe, but the combination of the two has relatively low heat dissipation efficiency.

[0004] Meanwhile, the one-way pipeline causes slow heat dissipation, increasing the length of the pipeline increases the length of the cooler, and the use of the coil pipe for heat dissipation increases the length, which causes smaller flow, thereby affecting the heat dissipation or increasing the cost. CONTENT OF THE UTILITY MODEL

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a double-flow air cooler, if the stainless steel pipe and the aluminum magnesium sheet are expanded and connected together, the corrosion resistance and heat exchange performance are greatly improved, and therefore the air cooler of the stainless steel pipe expanded and connected with the aluminum magnesium alloy fin is developed. The advantages of the stainless steel pipe corrosion resistance, high heat transfer efficiency, light weight and corrosion resistance are perfectly absorbed, and the double-flow process can realize the requirement of reducing flow and increasing the capacity of the cooler.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme: a double-flow air cooler, which comprises a main frame, an upper oil collecting box fixed above the main frame, a lower oil collecting box fixed below the main frame, a stainless steel cooling pipe arranged side by side in the main frame, the stainless steel cooling pipe being in communication with the upper oil collecting box and the lower oil collecting box, a plurality of aluminum magnesium alloy fins fixed outside the stainless steel cooling pipe, the aluminum magnesium alloy fins being equidistantly and parallelly arranged in the main frame, a turbulence piece arranged in the stainless steel cooling pipe, and a distance separating plate arranged at the middle position in the lower oil collecting box, so that the path of the transformer oil in the cooler is U-shaped.

[0007] As a preferred technical scheme of the utility model, a fan box is arranged at the front side of the main frame, and a plurality of heat dissipation fans are arranged in the fan box.

[0008] As a preferred technical scheme of the utility model, the outer side of the stainless steel cooling pipe is provided with an intermediate partition plate, and the intermediate partition plate is of C-shaped structure.

[0009] As a preferred technical scheme of the utility model, the lower oil collecting box is provided with an oil inlet and an oil outlet below, and the oil inlet and the oil outlet are located on the two sides of the distance partition plate.

[0010] As a preferred technical scheme of the utility model, the turbulence member comprises a turbulence wire and a straight wire, the straight wire penetrates the inside of the stainless steel cooling pipe, the outer side of the straight wire is spirally provided with the turbulence wire, the turbulence wire penetrates the stainless steel cooling pipe and is attached to the inner wall of the stainless steel cooling pipe, and the turbulence wire is fixedly connected with the straight wire.

[0011] As a preferred technical scheme of the utility model, the aluminum-magnesium alloy fin is composed of an aluminum-magnesium sheet and an aluminum-magnesium ring, the aluminum-magnesium sheet and the aluminum-magnesium ring are stamping formed, and the aluminum-magnesium ring is connected with the stainless steel cooling pipe in an expanding mode.

[0012] As a preferred technical scheme of the utility model, the surface of the aluminum-magnesium sheet is stamped with a crease, and the two side edges of the aluminum-magnesium alloy fin are stamped with wave patterns.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The upper oil collecting box located above the main frame changes the path of the transformer oil into a U-shaped structure, the distance partition plate below separates the lower oil collecting box into two parts for oil inlet and oil outlet, the transformer oil passes through more uniformly, the heat dissipation path length of the transformer oil is increased, and the heat dissipation effect is better.

[0015] 2. The turbulence member located in the stainless steel cooling pipe makes the transformer oil achieve the effect of turbulent flow when passing through the stainless steel cooling pipe, thereby improving the heat exchange efficiency of the oil in the cooling pipe.

[0016] 3. The aluminum-magnesium alloy fin located on the outer side of the stainless steel cooling pipe is integrally stamping formed, the row spacing and column spacing of the cooling pipe on the fin are optimized, the heat exchange area of the cooler in a unit volume is increased, the wind resistance outside the pipe is reduced, and the total heat exchange amount is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a side view structural schematic diagram of the double-flow air cooler of the utility model;

[0018] Figure 2 It is a side view structural schematic diagram of the double-flow air cooler of the utility model; Figure 1 It is a side view structural schematic diagram of the double-flow air cooler of the utility model;

[0019] Figure 3 It is a side view structural schematic diagram of the double-flow air cooler of the utility model;

[0020] Figure 4 For the utility model Figure 2 B direction schematic view in the middle;

[0021] Figure 5 For the utility model cooling pipe inner spoiler schematic view;

[0022] Figure 6 For the utility model fin schematic view;

[0023] Figure 7 For the utility model middle partition plate schematic view;

[0024] Wherein: 1, main frame; 2, fan box; 3, cooling fan; 4, aluminum-magnesium alloy fin; 5, stainless steel cooling pipe; 6, upper oil collecting box; 7, lower oil collecting box; 8, range partition plate; 9, oil inlet; 10, oil outlet; 11, middle partition plate; 12, disturbance silk; 13, straight silk. Specific implementation

[0025] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without creative labor all belong to the protection scope of the utility model. Embodiment

[0026] Please refer to Figures 1-7 The utility model provides a double-flow air cooler, and the air cooler includes a radiator main body, which is composed of a main frame 1, a stainless steel cooling pipe 5, an upper oil collecting box 6, a lower oil collecting box 7 and a range partition plate 8; the upper oil collecting box 6 and the lower oil collecting box 7 are arranged above and below the main frame 1 respectively; the range partition plate 8 is arranged at the middle part of the lower oil collecting box 7; the lower oil collecting box 7 is divided into left and right two parts by the range partition plate 8; a plurality of stainless steel cooling pipes 5 are arranged in the main frame 1; the upper and lower walls of the inner side of the main frame 1 are both perforated plates; the perforated plate has a plurality of through holes corresponding in number to the stainless steel cooling pipes 5; the arrangement mode and arrangement distance of the through holes of the perforated plate are the same as those of the holes of Figure 6 and Figure 7 , so that the upper oil collecting box 6 and the lower oil collecting box 7 are connected by the through holes and the stainless steel cooling pipes 5, as shown in Figure 3 The path of the transformer oil of the cooler forms a U-shaped path, so that the transformer oil in the stainless steel cooling pipe 5 flows through two flows; the double flow prolongs the flow path of the transformer oil in the cooler, increases the temperature difference between the inlet and outlet of the transformer oil, enhances the heat dissipation effect of the transformer oil and improves the heat dissipation capacity of the cooler.

[0027] As Figures 2-4 shown, the lower oil collecting box 7 is fixed below the oil inlet 9 and the oil outlet 10, and the oil inlet 9 and the oil outlet 10 are located on both sides of the distance partition plate 8. The distance partition plate 8 and the oil inlet 9 can be flange pipes welded below the lower oil collecting box 7, so as to be convenient for connecting with the oil tank of the transformer.

[0028] In the use process, since the upper oil collecting box 6 of the oil outlet part flows to the lower oil collecting box 7 through the stainless steel cooling pipe 5 with a certain drop, in order to prevent the oil from flowing out too fast due to the gravity and affecting the heat dissipation, the oil inlet flange and the oil outlet flange of the transformer oil tank can be set on the side or the bottom, so that in the use process, the oil pump transports the transformer oil of the oil tank from the oil outlet flange to the oil inlet 9 of the cooler, and then through the U-shaped circuit, the oil outlet, the connecting pipe and the oil inlet flange into the oil tank. In this process, due to the effect of pressure, the transformer oil in the stainless steel cooling pipe 5 of the oil outlet part of the U-shaped circuit can also flow uniformly and stably, so as to ensure the stability of heat dissipation.

[0029] As Figure 1 shown, the front side of the main frame 1 is fixed with the fan box 2, and a plurality of heat dissipation fans 3 are arranged in the fan box 2 according to needs. The number of heat dissipation fans 3 can be set to two or more according to actual use needs. After starting, the wind direction is from the main frame 1 to the fan box 2. At the same time, according to the industry habit, the air outlet side is called the front side.

[0030] As Figure 2 and Figure 6 shown, the aluminum-magnesium alloy fin 4 is integrally punched by aluminum-magnesium alloy. The aluminum-magnesium alloy fin 4 is composed of an aluminum-magnesium sheet and an aluminum-magnesium ring. The aluminum-magnesium ring can be sleeved on the outside of the stainless steel cooling pipe 5 and connected together by expansion. The stainless steel cooling pipe 5 has a certain row spacing and column spacing on the aluminum-magnesium alloy fin 4, which improves the heat exchanger area per unit volume, reduces the wind resistance outside the pipe, and improves the total heat exchange capacity.

[0031] As Figure 6 shown, the aluminum-magnesium alloy fin 4 is integrally punched. The surface of the aluminum-magnesium sheet is punched with a crease between two rows of pipes and a crease between two columns of pipes, which can increase the strength and rigidity of the aluminum-magnesium sheet. A wave pattern is punched on both side edges of the aluminum-magnesium alloy fin 4, which can increase the strength and rigidity of the aluminum-magnesium alloy fin 4, and also improve the aesthetics of the entire aluminum-magnesium alloy fin 4.

[0032] The whole stamping forming aluminum magnesium alloy fin 4 is 1 / 2 of the thickness of the steel sheet, and the density is 1 / 3 of the steel sheet. The weight of the same number of aluminum magnesium alloy fin 4 is about 1 / 6 of the steel sheet, and the total weight of the cooler is reduced, which provides great convenience for the production, transportation and installation of the cooler.

[0033] As shown in Figure 2 and Figure 7 , the outer side of the stainless steel cooling pipe 5 is fixed with the intermediate partition plate 11, the intermediate partition plate 11 is located in the gap between two adjacent aluminum magnesium alloy fins 4, the intermediate partition plate 11 is bent into a C-shaped structure, and the both ends are welded with the two inner side walls of the main frame 1. The strength and rigidity of the flat plate type partition plate are greater than that of the carbon steel pipe used intermediate partition plate 11.

[0034] The inside of the stainless steel cooling pipe 5 is provided with a spoiler, as shown in Figure 5 , the spoiler includes a disturbance wire 12 and a straight wire 13, the straight wire 13 passes through along the direction of the stainless steel cooling pipe 5, the straight wire 13 is parallel to the axial direction of the stainless steel cooling pipe 5, the disturbance wire 12 is wound outside the straight wire 13, the disturbance wire 12 is spirally wound outside the straight wire 13, and the disturbance wire 12 and the straight wire 13 are fixed together by welding, so that the straight wire 13 serves as the framework of the whole spoiler. In actual use, through the adjustment of the outer diameter, the spiral disturbance wire 12 can be in contact with the inner wall of the stainless steel cooling pipe 5, and the spiral disturbance wire 12 has a certain distance, which can disturb the oil flow boundary layer and make the transformer oil flow reach the turbulent flow effect, thereby improving the heat exchange of the transformer oil in the cooling pipe.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the utility model and do not limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A dual-flow air cooler, comprising a main frame (1), characterized in that: An upper oil collecting box (6) is fixed above the main frame (1), and a lower oil collecting box (7) is fixed below the main frame (1). Stainless steel cooling pipes (5) arranged side by side are provided inside the main frame (1). The stainless steel cooling pipes (5) are connected to the upper oil collecting box (6) and the lower oil collecting box (7). A plurality of aluminum-magnesium alloy fins (4) are fixed on the outside of the stainless steel cooling pipes (5). The aluminum-magnesium alloy fins (4) are arranged in parallel and equidistantly inside the main frame (1). A spoiler is provided inside the stainless steel cooling pipes (5). A partition plate (8) is provided in the middle position inside the lower oil collecting box (7), so that the path of the transformer oil in the cooler is U-shaped.

2. A dual-flow air cooler according to claim 1, characterized in that: A fan box (2) is provided on the front side of the main frame (1), and a plurality of cooling fans (3) are provided inside the fan box (2).

3. The dual-flow air cooler according to claim 2, characterized in that: A middle partition (11) is provided on the outer side of the stainless steel cooling pipe (5), and the middle partition (11) is a C-shaped structure.

4. The dual-flow air cooler according to claim 1, characterized in that: An oil inlet (9) and an oil outlet (10) are provided below the lower oil collecting box (7), and the oil inlet (9) and the oil outlet (10) are located on both sides of the step partition (8).

5. The dual-flow air cooler according to claim 1, characterized in that: The spoiler comprises a spoiler wire (12) and a straight wire (13), the straight wire (13) passes through the interior of the stainless steel cooling tube (5), the outer side of the straight wire (13) is spirally wound with the spoiler wire (12), the spoiler wire (12) passes through the stainless steel cooling tube (5) and fits with the inner wall of the stainless steel cooling tube (5), and the spoiler wire (12) and the straight wire (13) are fixedly connected.

6. The dual-flow air cooler according to claim 1, characterized in that: The aluminum-magnesium alloy fin (4) is composed of an aluminum-magnesium sheet and an aluminum-magnesium ring. The aluminum-magnesium sheet and the aluminum-magnesium ring are formed by stamping, and the aluminum-magnesium ring is connected to the stainless steel cooling pipe (5) by an expansion joint.

7. The dual-flow air cooler according to claim 6, characterized in that: Creases are punched on the surface of the aluminum-magnesium sheet, and wave patterns are punched on both side edges of the aluminum-magnesium alloy fin (4).

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