A temperature-compensated oil-air cooler

Abstract

A temperature-compensated oil-air cooler includes a fan panel, a fan housing is mounted on the fan panel, and a fan is mounted in the fan housing; side panels are mounted on both sides of the fan panel to form a heat exchange area; a heat exchange core assembly is arranged in the heat exchange area; the characteristics are: the heat exchange core assembly includes elliptical fin tubes arranged in groups, and the two ends of the elliptical fin tubes are respectively connected to a floating oil inlet pipe box and a fixed oil outlet pipe box; bolts are arranged along the axial direction of the upper elliptical fin tubes, and the bolts cooperate with the flanges on the side panels through sliding pairs to form a floating connection structure; the fixed oil outlet pipe box is fixedly connected to the side panels. The present invention provides a temperature-compensated oil-air cooler, which can dissipate heat and cool transformers, and has the advantages of compact structure and high heat dissipation efficiency, and can automatically perform temperature compensation according to the operating conditions of the cooler to improve the reliability of the cooler.

Description

Technical Field

[0001] The invention relates to cooler technology, in particular to a temperature-compensated oil-air cooler. Background Art

[0002] With the rapid development of my country's national economy, the demand for electricity is increasing. In order to meet the needs of production and life, the country has added a large number of high-voltage direct current and nuclear power plant booster transmission and transformation lines, ultra-high voltage and ultra-high voltage transmission and transformation lines, which requires the installation of extra-large transformers. The operation of extra-large transformers requires high safety, high performance and high reliability of ambient temperature to ensure, so the heat dissipation of transformer oil is a major technical problem that must be solved. Coolers with high heat dissipation efficiency can ensure the long-term, normal and stable operation of equipment, but this also requires the cooler to have high reliability. After the cooler is put into use, due to the high oil temperature of the transformer, the fin tube will undergo obvious thermal expansion, which leads to the risk of fracture of the weld between the fin tube and the tube box. For the coolers supporting extra-large transformers, it is necessary to carry out special research on the above risks to eliminate the impact of the thermal expansion of the fin tube on the stable operation of the cooler and improve the reliability of the cooler. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention provides a temperature compensated oil-air cooler, which can dissipate heat and cool the transformer, and has the advantages of compact structure and high heat dissipation efficiency. It can also automatically perform temperature compensation according to the operating conditions of the cooler, thereby improving the reliability of the cooler.

[0004] The technical solution of the present invention is as follows:

[0005] A temperature-compensated oil-air cooler comprises a fan panel, a fan housing is mounted on the fan panel, a fan is mounted in the fan housing; side panels are mounted on both sides of the fan panel to form a heat exchange area; a heat exchange core assembly is arranged in the heat exchange area; the heat exchange core assembly comprises elliptical fin tubes arranged in groups, the two ends of the elliptical fin tubes are respectively connected to a floating oil inlet pipe box and a fixed oil outlet pipe box; bolts are arranged on the floating oil inlet pipe box along the axial direction of the elliptical fin tubes, the bolts cooperate with the flanges on the side panels through sliding pairs to form a floating connection structure; the fixed oil outlet pipe box is fixedly connected to the side panels.

[0006] The principle of the cooler provided by the technical solution is to use a fan to drive wind through the surface of the elliptical wing tube to transfer the heat of the transformer oil in the wing tube to the air; when the transformer oil flows into the elliptical wing tube from the floating oil inlet pipe box, the hot oil in the pipe reaches the outer surface of the pipe through thermal conduction, and the heat is transferred to the air by the cold air brought by the fan, and the cooled transformer oil in the elliptical wing tube is brought back to the transformer circuit by external force and reheated, and this cycle repeats; the cooler of the present invention has the advantages of compact structure and high heat dissipation efficiency; the floating oil inlet pipe box is connected to the side plate by bolts, and the floating oil inlet pipe box, bolts and side plates together form a floating structure. When the elliptical wing tube changes in size in the axial direction due to thermal expansion, the floating oil inlet pipe box connected to the elliptical wing tube can move along the axial direction of the elliptical wing tube, thereby realizing temperature compensation, avoiding the risk of breakage between the wing tube and the pipe box, and improving the reliability of the cooler.

[0007] As an optimization, in the aforementioned temperature-compensated oil-air cooler, the cross section of the elliptical fin tube is elliptical, and the surface of the elliptical fin tube is provided with fins stacked on each other. Compared with the circular cross section of the fin tube, the elliptical setting can reduce wind resistance, speed up gas circulation, and improve heat dissipation efficiency; the fins distributed on the surface of the elliptical fin tube can conduct the heat dissipated by the tube body, thereby further enhancing the heat dissipation efficiency.

[0008] As an optimization, in the aforementioned temperature-compensated oil-air cooler, a group of cross beams are provided between the side panels installed on both sides of the fan panel, and the elliptical fin tubes are installed between the cross beams. The cross beams can support the elliptical fin tubes and enhance the stability of the side panels.

[0009] As an optimization, in the aforementioned temperature-compensated oil-air cooler, the floating oil inlet pipe box includes an oil inlet pipe and an oil inlet box body, a panel on one side of the oil inlet box body is connected to the oil inlet pipe, and a through hole A is provided on the panel on the other side, and the elliptical fin tube is connected to the through hole A by welding; bolts are provided on the oil inlet box body along the axial direction of the elliptical fin tube. The elliptical fin tube is connected to the oil inlet box body through the through hole A, and the end of the elliptical fin tube is directly inserted into the oil inlet box body, which simplifies the oil flow structure and makes the structure of the cooler more compact.

[0010] As an optimization, in the aforementioned temperature-compensated oil-air cooler, the fixed oil outlet pipe box includes an oil outlet pipe and an oil outlet box body, a panel on one side of the oil outlet box body is connected to the oil outlet pipe, a through hole B is provided on the panel on the other side, and the elliptical fin tube is connected to the through hole B by welding. The elliptical fin tube is connected to the oil outlet box body through the through hole B, and the end of the elliptical fin tube is directly inserted into the oil outlet box body, which simplifies the oil flow structure and makes the structure of the cooler more compact.

[0011] As an optimization, in the aforementioned temperature-compensated oil-air cooler, the fan includes a motor, the motor is connected to the blades, and the motor is fixed in the fan housing through a fixing frame; the number of fan housings and fans provided on the fan panel corresponds to the length of the elliptical fin tube. The motor is fixed in the fan housing through a fixing frame, which simplifies the structure of the fan; at the same time, the number of fans is set according to the length of the elliptical fin tube, which can reduce the production cost while ensuring the heat dissipation efficiency.

[0012] As an optimization, in the aforementioned temperature-compensated oil-air cooler, a windshield is provided on the elliptical fin tube, and the windshield is located between two adjacent fans. The windshield divides the elliptical fin tube into different areas, ensuring that different fans can stably and effectively dissipate heat in their respective areas.

[0013] As an optimization, in the aforementioned temperature-compensated oil-air cooler, a terminal box is provided on the fan panel. The terminal box is provided on the fan panel, which can facilitate the wiring of the fan and also makes the structure of the cooler more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of a temperature-compensated oil-air cooler of the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the structure after removing the side panels;

[0016] Figure 3 A top view of a temperature-compensated oil-air cooler of the present invention;

[0017] Figure 4 for Figure 1 AA section view;

[0018] Figure 5 for Figure 4 Enlarged view at the center circle C;

[0019] Figure 6 for Figure 1 Enlarged view at the center circle B;

[0020] Figure 7 It is a structural schematic diagram of the floating oil inlet pipe box;

[0021] Figure 8 It is a structural schematic diagram of a fixed oil outlet pipe box;

[0022] The markings in the accompanying drawings are: 1-fan panel; 2-fan cover; 3-fan, 301-motor, 302-blade, 303-fixed frame; 4-side panel; 5-cross beam; 6-elliptical wing tube; 7-floating oil inlet box, 701-oil inlet pipe, 702-oil inlet box body, 702A-through hole A; 8-fixed oil outlet box, 801-oil outlet pipe, 802-oil outlet box body, 802A-through hole B; 9-bolt; 10-wind shield; 11-terminal box. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods (including examples), but they are not intended to limit the present invention.

[0024] See also Figure 1-8 A temperature-compensated oil-air cooler comprises a fan panel 1, on which a fan housing 2 is mounted, in which a fan 3 is mounted; side panels 4 are mounted on both sides of the fan panel 1 to form a heat exchange area; a heat exchange core assembly is arranged in the heat exchange area; the heat exchange core assembly comprises elliptical fin tubes 6 arranged in groups, and both ends of the elliptical fin tubes 6 are respectively connected to a floating oil inlet pipe box 7 and a fixed oil outlet pipe box 8; bolts 9 are arranged on the floating oil inlet pipe box 7 along the axial direction of the elliptical fin tubes 6, and the bolts cooperate with the flanges on the side panels 4 through a sliding pair to form a floating connection structure; the fixed oil outlet pipe box 8 is fixedly connected to the side panels 4.

[0025] In the above-mentioned temperature-compensated oil-air cooler, during the cooling process, the transformer oil flows from the oil inlet pipe 701 into the oil inlet box 702, and then flows from the oil inlet box 702 into the elliptical wing tube 6. The hot oil in the elliptical wing tube 6 reaches the outer surface of the tube through thermal conduction, and the cold air brought by the fan 3 transfers the heat to the air. The cooled transformer oil in the elliptical wing tube 6 is brought back to the transformer circuit by external force and reheated, and this cycle is repeated to achieve cooling of the transformer oil.

[0026] As a specific embodiment of the present invention, see Figure 1-8 :

[0027] The cross section of the elliptical fin tube 6 is elliptical, and fins stacked on each other are arranged on the surface of the elliptical fin tube 6. Compared with the circular cross section of the fin tube, the elliptical arrangement can reduce wind resistance, speed up gas circulation, and improve heat dissipation efficiency; the fins distributed on the surface of the elliptical fin tube 6 can conduct the heat emitted by the tube body, thereby further enhancing the heat dissipation efficiency.

[0028] A group of cross beams 5 are arranged between the side panels 4 installed on both sides of the fan panel 1, and the elliptical wing tubes 6 are installed between the cross beams 5. The cross beams 5 can support the elliptical wing tubes 6 and enhance the stability of the side panels 4.

[0029] The floating oil inlet pipe box 7 includes an oil inlet pipe 701 and an oil inlet box body 702. The panel on one side of the oil inlet box body 702 is connected to the oil inlet pipe 701. The panel on the other side is provided with a through hole A702A. The elliptical fin tube 6 is connected to the through hole A702A by welding. Bolts 9 are provided along the axial direction of the upper edge of the elliptical fin tube 6. The elliptical fin tube 6 is connected to the oil inlet box body 702 through the through hole A702A. The end of the elliptical fin tube 6 is directly inserted into the oil inlet box body 702, which simplifies the oil flow structure and makes the structure of the cooler more compact.

[0030] The fixed oil outlet pipe box 8 includes an oil outlet pipe 801 and an oil outlet box body 802. The panel on one side of the oil outlet box body 802 is connected to the oil outlet pipe 801. The panel on the other side is provided with a through hole B. The elliptical fin tube 6 is connected to the through hole B802A by welding. The elliptical fin tube 6 is connected to the oil outlet box body 802 through the through hole B802A. The end of the elliptical fin tube 6 is directly inserted into the oil outlet box body 802, which simplifies the oil flow structure and makes the structure of the cooler more compact.

[0031] The fan 3 includes a motor 301, the motor 301 is connected to a blade 302, and the motor 301 is fixed in the fan housing 2 through a fixing frame 303; the number of fan housings 2 and fans 3 provided on the fan panel 1 corresponds to the length of the elliptical fin tube 6. The motor 301 is fixed in the fan housing 2 through the fixing frame 303, which simplifies the structure of the fan; at the same time, the number of fans 3 is set according to the length of the elliptical fin tube 6, which can reduce the production cost while ensuring the heat dissipation efficiency.

[0032] The elliptical fin tube 6 is provided with a windshield 10, and the windshield 10 is correspondingly located between two adjacent fans 3. The windshield 10 divides the elliptical fin tube 6 into different areas, ensuring that different fans can stably and effectively dissipate heat in their respective areas.

[0033] The fan panel 1 is provided with a terminal box 11. The fan panel 1 is provided with a terminal box 11, which can facilitate the wiring of the fan 3 and also make the structure of the cooler more compact.

[0034] The above general description of the invention involved in this application and the description of its specific implementation methods should not be understood as limiting the technical solutions of the invention. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description and / or specific implementation methods (including examples) without violating the constituent elements of the invention involved, to form other technical solutions within the scope of protection of this application.

Claims

1. A temperature-compensated oil-air cooler, comprising a fan panel (1), a fan housing (2) being mounted on the fan panel (1), a fan (3) being mounted in the fan housing (2); side panels (4) being mounted on both sides of the fan panel (1) to form a heat exchange area; a heat exchange core assembly being arranged in the heat exchange area; and characterized in that: The heat exchange core assembly comprises elliptical fin tubes (6) arranged in groups, and the two ends of the elliptical fin tubes (6) are respectively connected to a floating oil inlet pipe box (7) and a fixed oil outlet pipe box (8); bolts (9) are provided on the floating oil inlet pipe box (7) along the axial direction of the elliptical fin tubes (6); the bolts (9) cooperate with the flanges on the side plate (4) through a sliding pair, thereby forming a floating connection structure, so that when the elliptical fin tubes (6) produce axial size changes due to thermal expansion, the floating oil inlet pipe box (7) can move along the axial direction of the elliptical fin tubes (6); the fixed oil outlet pipe box (8) is fixedly connected to the side plate (4); the cross section of the elliptical fin tubes (6) is elliptical, and the surface of the elliptical fin tubes (6) is provided with fins stacked on each other; a group of cross beams are provided between the side plates (4) installed on both sides of the fan panel (1) (5), the elliptical wing tube (6) is installed between the cross beams (5); the floating oil inlet pipe box (7) comprises an oil inlet pipe (701) and an oil inlet box body (702); a panel on one side of the oil inlet box body (702) is connected to the oil inlet pipe (701), and a through hole A (702A) is provided on the panel on the other side, and the elliptical wing tube (6) is connected to the through hole A (702A) by welding; bolts (9) are provided on the oil inlet box body (702) along the axial direction of the elliptical wing tube (6); the fixed oil outlet pipe box (8) comprises an oil outlet pipe (801) and an oil outlet box body (802); a panel on one side of the oil outlet box body (802) is connected to the oil outlet pipe (801), and a through hole B (802A) is provided on the panel on the other side, and the elliptical wing tube (6) is connected to the through hole B (802A) by welding.

2. The temperature-compensated oil-air cooler according to claim 1 is characterized in that: The fan (3) comprises a motor (301), the motor (301) is connected to blades (302), and the motor (301) is fixed in the fan housing (2) via a fixing frame (303).

3. A temperature-compensated oil-air cooler according to claim 2, characterized in that: The number of fan casings (2) and fans (3) provided on the fan panel (1) corresponds to the length of the elliptical wing tube (6).

4. The temperature-compensated oil-air cooler according to claim 3 is characterized in that: The elliptical wing tube (6) is provided with a wind shield (10), and the wind shield (10) is located between two adjacent fans (3).

5. The temperature-compensated oil-air cooler according to any one of claims 1 to 4, characterized in that: The fan panel (1) is provided with a terminal box (11).

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