Air-cooled heat exchanger for coal mine

Abstract

The utility model provides an air-cooled heat exchanger for a coal mine, which comprises a heat exchanger mounting rack, a fan, a motor, a pair of end covers and a heat exchange tube device, the heat exchange tube device comprises a plurality of groups of heat exchange tube components, and the plurality of groups of heat exchange tube components are uniformly arranged in an inner cavity of the heat exchanger mounting rack; a plurality of heat exchange tube assemblies are arranged in an inner cavity of a heat exchanger mounting frame, a plurality of heat exchange tubes arranged at intervals and a heat conductor arranged at the center of the heat exchange tubes are arranged in each heat exchange tube assembly, the heat conductor is in contact with the outer walls of the heat exchange tubes, and a circulation space for air circulation is formed between the heat conductor and the heat exchange tubes. After the structure is adopted, fins are omitted, so that the installation space required by the whole heat exchanger is reduced, and when heat exchange air flows among the heat exchange tubes, the circulation space of the heat exchange air is enlarged compared with the flowing space of a traditional fin type heat exchanger, and the resistance borne by the heat exchange air is reduced; the heat exchange efficiency of the heat exchanger is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to an air-cooled heat exchanger for coal mines. Background Art

[0002] Coal mine conveyors are important equipment in coal mine production, which play an important role in coal mine production. The air-cooled heat exchanger is an indispensable part of the coal mine conveyor. The function of the air-cooled heat exchanger is to take away the heat dissipated by the coal mine conveyor engine to ensure the normal operation of the conveyor.

[0003] The existing air-cooled heat exchanger generally includes a frame, a plurality of pipes installed between the frames, and a plurality of fins arranged between the pipes. The fins are fixedly connected to the pipes by brazing. The function of the fins is to increase the contact area of the air between the pipes, thereby improving the heat exchange efficiency between the heat exchange medium flowing inside the pipes and the surrounding air. Since an air flow path needs to be formed, the air-cooled heat exchanger has certain requirements for its installation space and installation position. However, for occasions with limited installation space, when air flows between the fins of the heat exchanger, if the air inflow path is not along the radial direction of the pipe, the air flow resistance will increase, which will have an adverse impact on the heat dissipation performance of the heat exchanger. Summary of the Invention

[0004] Aiming at the defects existing in the prior art, the purpose of the utility model is to provide an air-cooled heat exchanger for coal mines to solve the problem that the existing finned heat exchanger is prone to have an adverse impact on the heat exchange performance of the heat exchanger in the case of limited installation space.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] The present application provides an air-cooled heat exchanger for coal mines. The air-cooled heat exchanger includes a heat exchanger mounting frame, a fan, a motor, a pair of end caps, and a heat exchange tube device arranged on the heat exchanger mounting frame. The pair of end caps are respectively arranged at opposite ends of the heat exchanger mounting frame. An inlet and an outlet are respectively arranged on the pair of end caps. The heat exchange tube device is respectively communicated with the inlet and the outlet. The heat exchange tube device includes multiple groups of heat exchange tube assemblies. The multiple groups of heat exchange tube assemblies are uniformly arranged in the inner cavity of the heat exchanger mounting frame. Each group of heat exchange tube assemblies includes a plurality of heat exchange tubes and a heat conductor arranged between the plurality of heat exchange tubes. The heat conductor is in contact with the outer walls of the plurality of heat exchange tubes. A flow space for air circulation is formed between the heat conductor and the heat exchange tubes. Both ends of each heat exchange tube are respectively communicated with the pair of end caps.

[0007] Further, the heat conductor has a spiral outer shape structure, and the heat conductor extends from one end of the inner cavity of the heat exchanger mounting frame to the opposite end. A plurality of the heat exchange tubes are arranged at intervals along the circumferential direction on the outer wall of the heat conductor.

[0008] Further, the heat conductor has a triangular outer shape structure, and recessed portions that fit the outer walls of the heat exchange tubes are respectively formed at three vertices of the heat conductor. The three heat exchange tubes are respectively fixedly arranged at the three vertices of the heat conductor.

[0009] Further, the diameter dimension of the heat exchange tube is between 0.1 mm and 0.3 mm.

[0010] Further, lifting lugs for easy hoisting are respectively arranged at opposite sides of the top end of the fan.

[0011] The beneficial effects of the present utility model are as follows: By arranging a plurality of heat exchange tube assemblies evenly spaced in the inner cavity of the heat exchanger mounting frame, each heat exchange tube assembly is provided with a plurality of heat exchange tubes arranged at intervals and a heat conductor arranged at the center of the plurality of heat exchange tubes. The heat conductor is in contact with the outer walls of the multiple heat exchange tubes, and a flow space for air circulation is formed between the heat conductor and the heat exchange tubes. After adopting the above structure, since the fins are omitted, the installation space required for the entire heat exchanger is reduced. Moreover, when the heat exchange air flows between the heat exchange tubes, the flow space of the heat exchange air is larger than that of the traditional finned heat exchanger, and the resistance suffered by the heat exchange air becomes smaller. In addition, the setting of the heat conductor further improves the heat exchange efficiency of the heat exchanger. Description of the Drawings

[0012] Figure 1 is a three-dimensional structural schematic diagram of the air-cooled heat exchanger for coal mines in the embodiment of the present application.

[0013] Figure 2 is a three-dimensional structural schematic diagram of the heat exchange tube device in the embodiment of the present application.

[0014] Figure 3 is Figure 2 a partial enlarged structural schematic diagram of the A place in

[0015] Figure 4 is a three-dimensional structural schematic diagram of multiple groups of heat exchange tube assemblies in the embodiment of the present application.

[0016] Figure 5 is a three-dimensional structural schematic diagram of the heat exchange tube assembly in the embodiment of the present application.

[0017] Figure 6 is a three-dimensional structural schematic diagram of the heat exchange tube assembly in another embodiment of the present application.

[0018] Figure 7Schematic cross-sectional structure diagram of the heat exchange tube assembly in another embodiment of the present application.

[0019] In the figure:

[0020] 100 - Air-cooled heat exchanger, 10 - Motor, 20 - Fan, 30 - Heat exchanger mounting frame, 40 - Lifting lug, 50 - Mounting groove, 60 - End cover, 61 - Inlet, 62 - Outlet, 70 - Heat exchange tube device, 71 - Heat exchange tube assembly, 711 - Heat exchange tube, 712 - Heat conductor, 7121 - Concave portion. Detailed implementation manners

[0021] The following further elaborates on the present utility model in conjunction with the description of the accompanying drawings and specific implementation manners.

[0022] Refer to the attached Figure 1 to the attached Figure 5 As shown, this embodiment provides a coal mine air-cooled heat exchanger 100, which includes a heat exchanger mounting frame 30, a fan 20, a motor 10, a pair of end covers 60, and a heat exchange tube device 70. The pair of end covers 60 are respectively fixedly installed at the opposite upper and lower ends of the heat exchanger mounting frame 30. The heat exchange tube device 70 is fixedly installed in the inner cavity of the heat exchanger mounting frame 30. The fan 20 is fixedly installed on the back side of the heat exchanger mounting frame 30, that is, on the other side relative to the heat exchange tube device 70. The motor 10 is connected to the fan 20 to drive the fan 20 to rotate.

[0023] Continuing to refer to the attached Figure 1 As described, in order to facilitate hoisting and installation, a pair of upwardly extending lifting lugs 40 are respectively fastened and installed on the left and right sides of the upper end of the fan 20, and a mounting groove 50 is respectively fixedly installed on the left and right sides of the bottom ends of the fan 20 and the heat exchanger mounting frame 30.

[0024] Refer to the attached Figure 2 to the attached Figure 5 As shown, a pair of end covers 60 are respectively provided with an inlet 61 and an outlet 62. The inlet 61 and the outlet 62 are arranged diagonally. For example, if the inlet 61 is installed on the left side of one end cover 60, then the outlet 62 is installed on the right side of the other end cover 60.

[0025] Continuing to refer to the attached Figure 3 to the attached Figure 5As shown, the heat exchange tube device 70 includes multiple groups of heat exchange tube assemblies 71. The multiple groups of heat exchange tube assemblies 71 are evenly arranged in the inner cavity of the heat exchanger mounting frame 30. Each group of heat exchange tube assemblies 71 includes multiple heat exchange tubes 711 and a heat conductor 712 disposed between the multiple heat exchange tubes 711. The heat conductor 712 is made of a metal with high thermal conductivity. The heat conductor 712 is in contact with the outer walls of the multiple heat exchange tubes 711, and a flow space for air circulation is formed between the heat conductor 712 and the heat exchange tubes 711. Both ends of each heat exchange tube 711 are respectively communicated with the inner cavities of a pair of end caps 60.

[0026] The diameter size of the heat exchange tubes 711 is between 0.1 mm and 0.3 mm. By using the outer shape structure of the heat exchange tubes 711 of the above size, external air can not only flow in from the front, but also flow in from the side, without being restricted by the direction. Even if it is externally introduced in any direction, it can collide with the heat exchange tubes 711, thereby improving the heat exchange efficiency. The heat exchange tubes 711 can have a tube structure with a moving channel for the refrigerant. Although the cross-sectional shape is not restricted, it preferably has a cylindrical structure.

[0027] Refer to the attached Figure 4 and attached Figure 5 As shown, in an embodiment, the heat conductor 712 has a spiral outer shape structure. The heat conductor 712 extends from one end of the inner cavity of the heat exchanger mounting frame 30 to the opposite end, that is, the length size of the heat conductor 712 is the same as the length size of the heat exchange tubes 711. The multiple heat exchange tubes 711 are arranged at intervals in the circumferential direction on the outer wall of the heat conductor 712. The heat conductor 712 has the same length as the heat exchange tubes 711, which can not only improve the heat conduction efficiency, but also perform the function of supporting the intervals between the heat exchange tubes 711. And the heat conductor 712 can be arranged between four heat exchange tubes 711 and can be arranged to have four contact points in each group. At this time, each heat exchange tube 711 can be in contact with two adjacent heat conductors 712 to conduct heat exchange. The heat conductor 712 with four contact points can make the heat exchange tubes 711 be in contact at 90-degree intervals to be stably supported, and at the same time play the role of supporting the heat exchange tubes 711.

[0028] Refer to the attached Figure 6 and attached Figure 7As shown in the figure, this embodiment also provides a heat conductor 712 with another structural form. The heat conductor 712 has a triangular outer shape structure. At the three vertices of the heat conductor 712, recessed portions 7121 that fit the outer wall of the heat exchange tube 711 are respectively formed. The three heat exchange tubes 711 are respectively fixedly arranged at the three vertices of the heat conductor 712. The number of triangular heat conductors 712 is multiple, and multiple heat conductors 712 with triangular outer shape structures are arranged at intervals along the length direction of the heat exchange tube 711. By contacting the recessed portions 7121 of the heat exchange tube 711, the heat conduction efficiency is increased, that is, through surface contact, the heat transfer efficiency from the heat exchange tube 711 to the heat conductor 712 can be improved.

[0029] To better understand the air-cooled heat exchanger 100 for coal mines in this embodiment, the following briefly describes its working principle:

[0030] During use, the motor 10 drives the fan 20 to rotate. The fan 20 sucks the hot air in the equipment area (such as the engine area in a coal mine conveyor) to the heat exchanger device, so that the hot air flows from one side of the gap between the heat exchange tubes 711 to the other side. When the hot air passes through the area between the heat exchange tubes 711, the refrigerant medium enters from the inlet 61, flows through the heat exchange tubes 711 and exchanges heat with the hot air flowing over the outer surface of the heat exchange tubes 711, reducing the temperature of the hot air. The heat-exchanged refrigerant medium flows out from the outlet 62. Such cyclic flow is used to complete the cooling process of the hot air near the equipment area and reduce the working temperature of the equipment.

[0031] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and its equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. An air-cooled heat exchanger for coal mines, the air-cooled heat exchanger comprising a heat exchanger mounting frame, a fan, a motor, a pair of end caps, and a heat exchange tube device disposed on the heat exchanger mounting frame, the pair of end caps being respectively disposed at opposite ends of the heat exchanger mounting frame, an inlet and an outlet being respectively disposed on the pair of end caps, the heat exchange tube device being respectively in communication with the inlet and the outlet, characterized in that, The heat exchange tube device includes multiple groups of heat exchange tube assemblies. The multiple groups of heat exchange tube assemblies are evenly arranged in the inner cavity of the heat exchanger mounting frame. Each group of heat exchange tube assemblies includes a plurality of heat exchange tubes and a heat conductor arranged between the plurality of heat exchange tubes. The heat conductor is in contact with the outer walls of the plurality of heat exchange tubes. A flow space for air circulation is formed between the heat conductor and the heat exchange tubes. Both ends of each heat exchange tube are respectively communicated with a pair of end covers.

2. The air-cooled heat exchanger for coal mines according to claim 1, wherein, The heat conductor has a spiral outer shape structure. The heat conductor extends from one end of the inner cavity of the heat exchanger mounting frame to the opposite end. The plurality of heat exchange tubes are arranged at intervals in the circumferential direction on the outer wall of the heat conductor.

3. The air-cooled heat exchanger for coal mines according to claim 1, wherein, The heat conductor has a triangular outer shape structure. Concave portions that fit the outer walls of the heat exchange tubes are respectively formed at three vertices of the heat conductor. The three heat exchange tubes are respectively fixedly arranged at the three vertices of the heat conductor.

4. A coal mine air-cooled heat exchanger according to any one of claims 1 to 3, characterized in that, The diameter size of the heat exchange tube is between 0.1 mm and 0.3 mm.

5. The air-cooled heat exchanger for coal mines according to claim 1, characterized in that, Lifting lugs for easy hoisting are respectively arranged at opposite sides of the top of the fan.

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