Large mine-used direct heat exchange device for waste air

Abstract

The utility model discloses a large -scale mining is directly heat exchange device of lack of wind, related to heat exchange equipment technical field, including heat exchange box, the inside transverse array of heat exchange box is equipped with heat exchange pipe, the cross section of heat exchange pipe is runway shape structure, the plane side of runway shape structure of heat exchange pipe is equipped with heat exchange fin, the both ends of heat exchange pipe are connected with the support circular pipe, the side wall of heat exchange box with between support circular pipe is equipped with sealed bearing, the both sides of heat exchange box's outside are equipped with hot -blast pipe group, and between both sides hot -blast pipe group with support circular pipe is equipped with swivel joint, and between the heat exchange pipe of two groups of adjacent is equipped with adjusting lever, the outside of heat exchange fin with between adjusting lever is connected with adjusting connecting plate, and the whole structure can be according to the fluctuation of mine four seasons working condition, and the flow channel, air velocity and heat exchange path are adjusted actively, and the heat exchange efficiency and energy -saving adaptability are improved, satisfy the dynamic ventilation and energy -saving demand of mine.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, specifically to a large-scale direct heat exchange device for mine exhaust air. Background Technology

[0002] Large-scale direct heat exchangers for mine exhaust air are core heat recovery equipment deployed near the mine's return air shaft. They are specifically designed to achieve direct heat exchange between exhaust air and cold air from the intake shaft. The two airflows conduct heat efficiently without mixing, eliminating the need for intermediate water circulation. They directly introduce the large amount of sensible heat carried by the exhaust air into the cold fresh air, providing stable preheating for the intake air in cold seasons, effectively preventing icing in the shaft. Simultaneously, they eliminate the pumping energy consumption of traditional water-based systems, making them key equipment for energy-saving retrofitting of coal mine ventilation systems. Traditional exhaust air heat exchangers typically use fixed array structures for their heat exchange pipes. The pipe spacing, arrangement angle, and flow cross-sectional area cannot be adjusted, resulting in a fixed heat exchange area and path. Faced with fluctuating mine operating conditions throughout the year, the equipment cannot enhance heat exchange by adjusting the flow path to increase air velocity, making it difficult to match the dynamically changing ventilation and energy-saving needs of the mine. Utility Model Content

[0003] The purpose of this utility model is to provide a large-scale direct heat exchange device for mine exhaust air, in order to solve the problem mentioned in the background art that the heat exchange pipes of traditional exhaust air heat exchange equipment are mostly fixed array structures, and the pipe spacing, arrangement angle and flow cross-sectional area cannot be adjusted, resulting in a fixed heat exchange area and heat exchange path. In the face of the seasonal fluctuations in mine operating conditions, the equipment cannot increase the air velocity by adjusting the flow channel to enhance heat exchange, making it difficult to match the dynamic ventilation and energy-saving needs of the mine.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a large-scale direct heat exchange device for mine exhaust air, comprising a heat exchange box, wherein heat exchange tubes are arranged in a transverse array inside the heat exchange box, the cross-section of the heat exchange tubes is racetrack-shaped, heat exchange vanes are provided on the planar side of the racetrack-shaped structure of the heat exchange tubes, and supporting circular tubes are connected to both ends of the heat exchange tubes. A sealed bearing is provided between the side wall of the heat exchange box and the supporting circular tubes. Hot air duct groups are provided on both sides of the exterior of the heat exchange box, and rotary joints are provided between the hot air duct groups on both sides and the supporting circular tubes. An adjusting rod is provided between two adjacent sets of heat exchange tubes, and an adjusting connecting plate is connected between the outer side of the heat exchange vanes and the adjusting rod.

[0005] Preferably, the outer surface of the adjusting rod is provided with an adjusting connecting seat at a position corresponding to the adjusting connecting plate, the adjusting connecting plate is provided with an adjusting groove, and the adjusting grooves on both sides are connected to the adjusting connecting seat through bolts.

[0006] Preferably, the hot air duct assembly includes a central vertical duct and horizontal ducts on both sides of the vertical duct that communicate with it. The horizontal ducts at the same height on both sides of the vertical duct are connected to the heat exchange tubes in the same layer inside the heat exchange box via the rotary joint. The diameter of the vertical duct is larger than the diameter of the horizontal duct.

[0007] Preferably, the heat exchange box is provided with connecting air vents at both the front and rear ends, and the connecting air vents are connected to the front and rear ends of the heat exchange box by air guide hoods.

[0008] Preferably, the upper and lower ends of the adjusting rod are slidably connected to the upper and lower walls of the heat exchange box, respectively.

[0009] Compared with the existing technology, the beneficial effects of this utility model are: by solving the problem of fixed heat exchange area and path in traditional exhaust air heat exchange equipment through innovative structure, the heat exchange box is equipped with a horizontally arrayed racetrack-shaped heat exchange tube and heat exchange fins to enhance turbulence and heat exchange efficiency. The angle of the heat exchange tube relative to the heat exchange box can be adjusted by adjusting rod. The overall structure can actively adjust the flow channel, wind speed and heat exchange path according to the fluctuation of mine working conditions in all four seasons, improve heat exchange efficiency and energy-saving adaptability, and meet the dynamic ventilation and energy-saving needs of the mine. Attached Figure Description

[0010] Figure 1 This is an isometric view of the main structure of this utility model; Figure 2 This is an isometric sectional view of the main structure of this utility model; Figure 3 This is a left sectional view of the main structure of this utility model; Figure 4 This is a front sectional view of the main structure of this utility model; Figure 5 This is a top sectional view of the main structure of this utility model.

[0011] In the diagram: 1-Heat exchange box, 2-Heat exchange tube, 3-Heat exchange fins, 4-Supporting round tube, 5-Sealed bearing, 6-Hot air duct assembly, 7-Rotary joint, 8-Adjusting rod, 9-Adjusting connecting plate, 10-Adjusting connecting seat, 11-Adjusting groove, 12-Connecting air outlet, 13-Air guide cover. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Please see Figure 1-5 This utility model provides a large-scale direct heat exchange device for mine exhaust air, including a heat exchange box 1. Heat exchange tubes 2 are arranged in a horizontal array inside the heat exchange box 1. The cross-section of the heat exchange tubes 2 is racetrack-shaped. Heat exchange vanes 3 are provided on the planar side of the racetrack-shaped structure of the heat exchange tubes 2. Supporting circular tubes 4 are connected to both ends of the heat exchange tubes 2. Sealed bearings 5 ​​are provided between the side wall of the heat exchange box 1 and the supporting circular tubes 4. Hot air duct groups 6 are provided on both sides of the exterior of the heat exchange box 1. Rotary joints 7 are provided between the hot air duct groups 6 on both sides and the supporting circular tubes 4. Adjusting rods 8 are provided between two adjacent groups of heat exchange tubes 2. Adjusting connecting plates 9 are connected between the outer side of the heat exchange vanes 3 and the adjusting rods 8.

[0014] In use, cold air is introduced into the heat exchange chamber 1, and hot air is introduced into the heat exchange tube 2 through the hot air duct assembly 6 and the supporting round tube 4. Support round tubes 4 are set at both ends of the heat exchange tube 2. Sealed bearings 5 ​​are set on the supporting round tubes 4, and the heat exchange tube 2 is rotatably connected to the heat exchange chamber 1 through the sealed bearings 5. A rotary joint 7 is set between the hot air duct assembly 6 and the supporting round tube 4 to ensure the smooth rotation of the heat exchange tube 2 while ensuring the flow of hot air. The cross-section of the heat exchange tube 2 has a racetrack-shaped structure. The adjusting rod 8 is connected to the heat exchange tube 2 through the adjusting connecting plate 9. By pulling the adjusting rod 8, the heat exchange tube 2 is rotated, and the angle between the racetrack-shaped structure of the heat exchange tube 2 and the heat exchange chamber 1 is adjusted. Heat exchange fins 3 are set on the heat exchange tube 2 to increase the contact area between the heat exchange tube 2 and the cold air and improve the heat exchange efficiency.

[0015] An adjustment connecting seat 10 is provided on the outer surface of the adjustment rod 8 at a position corresponding to the adjustment connecting plate 9. An adjustment groove 11 is provided on the adjustment connecting plate 9. The adjustment grooves 11 on both sides are connected to the adjustment connecting seat 10 through bolts. An adjustment connecting seat 10 is provided on the outer side of the adjustment rod 8, and an adjustment groove 11 is provided on the adjustment connecting plate 9. The adjustment groove 11 is connected to the adjustment connecting seat 10 through bolts, so that the adjustment connecting plate 9 and the adjustment connecting seat 10 are movably connected, thereby driving the heat exchange tube 2 to rotate through the adjustment rod 8.

[0016] The hot air duct assembly 6 includes a vertical duct in the center and horizontal ducts on both sides of the vertical duct that are connected to the vertical duct. The horizontal ducts at the same height on both sides of the vertical duct are connected to the heat exchange tubes 2 in the same layer of the heat exchange box 1 through the rotary joint 7. The diameter of the vertical duct is larger than that of the horizontal duct. Hot air ducts with different diameters are designed to ensure the uniformity of hot air distribution.

[0017] Both the front and rear ends of the heat exchange box 1 are provided with connecting air vents 12. The connecting air vents 12 are connected to the front and rear ends of the heat exchange box 1 by air guide hoods 13, and the heat exchange box 1 is connected to the cold air through the connecting air vents 12 and air guide hoods 13.

[0018] The upper and lower ends of the adjusting rod 8 are slidably connected to the upper and lower walls of the heat exchange box 1, respectively, to ensure smooth up and down movement of the adjusting rod 8.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-scale direct heat exchanger for mine exhaust air, characterized in that: The device includes a heat exchange box (1), in which heat exchange tubes (2) are arranged in a horizontal array inside the heat exchange box (1). The heat exchange tubes (2) have a racetrack-shaped cross-section. Heat exchange fins (3) are provided on the plane side of the racetrack-shaped structure of the heat exchange tubes (2). Supporting round tubes (4) are connected to both ends of the heat exchange tubes (2). Sealed bearings (5) are provided between the side wall of the heat exchange box (1) and the supporting round tubes (4). Hot air duct groups (6) are provided on both sides of the exterior of the heat exchange box (1). Rotary joints (7) are provided between the hot air duct groups (6) on both sides and the supporting round tubes (4). Adjusting rods (8) are provided between two adjacent heat exchange tube groups (2). Adjusting connecting plates (9) are connected between the outer side of the heat exchange fins (3) and the adjusting rods (8).

2. A large-scale direct heat exchanger for mine exhaust air according to claim 1, characterized in that: An adjustment connecting seat (10) is provided on the outer surface of the adjustment rod (8) at a position corresponding to the adjustment connecting plate (9). An adjustment groove (11) is provided on the adjustment connecting plate (9). The adjustment grooves (11) on both sides are connected to the adjustment connecting seat (10) through bolts.

3. A large-scale direct heat exchanger for mine exhaust air according to claim 1, characterized in that: The hot air duct assembly (6) includes a vertical pipe located in the center and horizontal pipes located on both sides of the vertical pipe and connected to the vertical pipe. The horizontal pipes at the same height on both sides of the vertical pipe are connected to the heat exchange tubes (2) in the same layer in the heat exchange box (1) through the rotary joint (7). The diameter of the vertical pipe is larger than the diameter of the horizontal pipe.

4. A large-scale direct heat exchanger for mine exhaust air according to claim 1, characterized in that: The heat exchange box (1) is provided with connecting air vents (12) at both the front and rear ends, and the connecting air vents (12) are connected to the front and rear ends of the heat exchange box (1) by air guide hoods (13).

5. A large-scale direct heat exchanger for mine exhaust air according to claim 1, characterized in that: The upper and lower ends of the adjusting rod (8) are slidably connected to the upper and lower walls of the heat exchange box (1), respectively.

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