Mine low-temperature chilled water driven cooling device

Abstract

The utility model discloses a kind of mine low-temperature frozen water drive cooling cooling devices, including shell, first fan, second fan, first water wheel, first water inlet pipe, first water outlet pipe, second water wheel, second water inlet pipe and second water outlet pipe, finned tube heat exchanger, heat exchanger water inlet pipe and heat exchanger water outlet pipe, first fan, second fan are respectively arranged in shell both ends, finned tube heat exchanger is arranged in shell side, refrigeration frozen water device outlet, first water inlet pipe, first water wheel, first water outlet pipe, heat exchanger water inlet pipe, finned tube heat exchanger, heat exchanger water outlet pipe, second water inlet pipe, second water wheel, second water outlet pipe, refrigeration frozen water device return water port are sequentially connected, first water wheel drive shaft is fixedly connected with first fan rotating shaft, second water wheel drive shaft is fixedly connected with second fan rotating shaft.The utility model uses low-temperature frozen water as power, cooling cooling device both ends send cooling air simultaneously, not only heat exchange efficiency is greatly improved, and energy-saving explosion-proof, safe cooling.

Description

Technical Field

[0001] This utility model relates to the field of mine cooling and safety technology, and in particular to a mine-use low-temperature chilled water driven cooling device for safe cooling of deep mining faces in coal mines. Background Technology

[0002] Mine safety cooling is a critical issue facing my country's coal production and a global engineering challenge. With increasing coal demand, dwindling shallow resources, and continuously increasing mining depths, the problem of mine safety cooling has become increasingly prominent. The hot and humid underground environment not only causes discomfort and excessive thermal stress that disrupts the body's thermal balance, but it can also lead to heatstroke, abnormal psychological and physiological responses, reduced labor productivity, increased accident rates, and seriously impact coal mine safety.

[0003] Currently, the common method for cooling and dehumidifying mines is to use a water-cooling system. This involves installing refrigeration units on the surface or underground to produce low-temperature chilled water, which is then transported to the point of use via pipelines. Finally, the air entering the working face is cooled and dehumidified by the cooling and dehumidifying devices installed at the underground point of use, thereby improving the air environment at the work site.

[0004] However, the cooling devices currently used in underground mining faces typically employ a fan to draw in air at one end, conduct air heat exchange in the middle, and then exhaust air from the other end. This cooling method has several drawbacks. First, it can only cool the surface from one side within the shaft, resulting in low heat exchange efficiency and an inability to achieve comprehensive cooling of the mining face. Second, the fans require electric power, necessitating long-distance wiring, which not only consumes a lot of energy but also makes the wiring prone to damage and leakage, posing a safety hazard. Furthermore, coal mining is a special operation with extremely high explosion-proof requirements, necessitating significant investment and maintenance of explosion-proof measures for electrically driven equipment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a mining low-temperature chilled water driven cooling device that can simultaneously deliver cooling air from both ends in the shaft when cooling and cooling the working face in underground mining. This greatly improves the heat exchange efficiency and can achieve comprehensive cooling and cooling of the working face. Moreover, the air delivery does not require electric power, and it is energy-saving, explosion-proof, economical, reliable, and can ensure safe cooling.

[0006] To solve the above-mentioned technical problems, this utility model adopts a mining low-temperature chilled water driven cooling and temperature reduction device, including a shell, a fan, a water turbine mechanism, and a heat exchanger mechanism. The shell has a first air outlet and a second air outlet at both ends, and an air inlet on one side. The fan includes a first fan and a second fan, which are respectively located at the first and second air outlets. The heat exchanger mechanism includes a finned tube heat exchanger, a heat exchanger inlet pipe, and a heat exchanger outlet pipe. The finned tube heat exchanger is located at the air inlet. The water turbine mechanism includes a first water turbine, a first inlet pipe, a first outlet pipe, a second water turbine, a second inlet pipe, and a second outlet pipe. The first and second water turbines are both located inside the shell. One end of the first inlet pipe connects to the first water turbine for water intake. The system is configured with the following connections: one end of the first inlet pipe is connected to the outlet of the chilled water device; one end of the first outlet pipe is connected to the outlet of the first water wheel; the other end of the first outlet pipe is connected to one end of the inlet pipe of the heat exchanger; the other end of the heat exchanger inlet pipe is connected to the inlet of the finned tube heat exchanger; one end of the heat exchanger outlet pipe is connected to the outlet of the finned tube heat exchanger; the other end of the heat exchanger outlet pipe is connected to one end of the second inlet pipe; the other end of the second inlet pipe is connected to the inlet of the second water wheel; the outlet of the second water wheel is connected to one end of the second outlet pipe; the other end of the second outlet pipe is connected to the return port of the chilled water device; the first water wheel drive shaft is fixedly connected to the first fan shaft; and the second water wheel drive shaft is fixedly connected to the second fan shaft.

[0007] In a preferred embodiment of the present invention, the outer shell is rectangular, and the first fan and the second fan are respectively disposed on the front end face and the rear end face of the outer shell. The outer shell is provided with a first inspection door and a second inspection door respectively corresponding to the positions of the first water wheel and the second water wheel.

[0008] In a preferred embodiment of the present invention, the bottom of the outer shell is provided with a base support, the base support is provided with a lifting hole, and the bottom of the first water wheel and the bottom of the second water wheel are respectively provided with a first water wheel support and a second water wheel support.

[0009] In a preferred embodiment of this utility model, the first water inlet pipe is disposed inside the outer casing. The first water inlet pipe is connected to the outlet of the chilled water device through a connecting pipe. The first water inlet pipe is a small-diameter water pipe, and the connecting pipe is a large-diameter water pipe. An exhaust valve is provided above the connecting pipe, and the exhaust valve is connected to the connecting pipe through a high-pressure needle valve. A drain valve is provided at the bottom of the outer casing.

[0010] In a preferred embodiment of this utility model, the flow rate of the low-temperature chilled water in the first and second water turbines is 26-35 m³ / H, and the working pressure is 6.4 MPa.

[0011] By adopting the above structure, this utility model has the following beneficial effects: This utility model relates to a low-temperature chilled water-driven cooling and temperature reduction device for mining, comprising a shell, a fan, a water turbine mechanism, and a heat exchanger mechanism. The shell has a first air outlet and a second air outlet at both ends, and an air inlet on one side. The fan includes a first fan and a second fan, respectively located at the first and second air outlets. The heat exchanger mechanism includes a finned tube heat exchanger, a heat exchanger inlet pipe, and a heat exchanger outlet pipe. The finned tube heat exchanger is located at the air inlet. The water turbine mechanism includes a first water turbine, a first inlet pipe, a first outlet pipe, a second water turbine, a second inlet pipe, and a second outlet pipe. The first and second water turbines are both housed within the shell. One end of the first inlet pipe is connected to the inlet of the first water turbine. The other end of the inlet pipe is connected to the outlet of the chilled water device. One end of the first outlet pipe is connected to the outlet of the first water wheel. The other end of the first outlet pipe is connected to one end of the heat exchanger inlet pipe. The other end of the heat exchanger inlet pipe is connected to the inlet of the finned tube heat exchanger. One end of the heat exchanger outlet pipe is connected to the outlet of the finned tube heat exchanger. The other end of the heat exchanger outlet pipe is connected to one end of the second inlet pipe. The other end of the second inlet pipe is connected to the inlet of the second water wheel. The outlet of the second water wheel is connected to one end of the second outlet pipe. The other end of the second outlet pipe is connected to the return port of the chilled water device. The first water wheel drive shaft is fixedly connected to the first fan shaft. The second water wheel drive shaft is fixedly connected to the second fan shaft. On the one hand, this utility model uses a finned tube heat exchanger installed on one side of the outer shell with an air inlet on the side of the outer shell. A first air outlet and a second air outlet are respectively set at both ends of the outer shell, and a first fan and a second fan are installed at both ends to simultaneously blow cold air. This significantly increases the heat exchange area and the cooling space inside the outer shell, greatly improving heat exchange efficiency. The simultaneous blowing of cold air from both ends of this cooling device cools both ends of the shaft, thus achieving comprehensive cooling of the mining face. On the other hand, this utility model uses low-temperature chilled water prepared by an existing coal mine chilled water preparation device as power to drive the water turbine, which in turn rotates the fan to deliver cooling air. This utility model does not require electricity to drive the fan, eliminates the need for wiring, and avoids the safety hazards of wire damage and leakage from the cooling device. It is also highly efficient and explosion-proof, reducing the investment of manpower and resources, greatly reducing production costs, saving energy, and ensuring safe cooling of deep mining faces in coal mines.

[0012] The outer casing of this utility model is rectangular. The first fan and the second fan are respectively disposed on the front and rear faces of the outer casing. A first inspection door and a second inspection door are respectively provided on the outer casing corresponding to the positions of the first and second water impellers. The rectangular structure of the outer casing of this utility model is more adaptable to coal mine shafts, provides better cooling effect, and is easier to transport and install; the inspection doors facilitate maintenance of the water impellers.

[0013] The bottom of the outer casing of this utility model is provided with a base support, and the base support is provided with a lifting hole. The bottom of the first water wheel and the bottom of the second water wheel are respectively provided with a first water wheel support and a second water wheel support. The structure of the base support of this utility model makes this cooling device easy to install; the structure of the water wheel support ensures that the water wheel is installed in place and operates stably.

[0014] In this invention, the first water inlet pipe is disposed inside the outer casing. The first water inlet pipe is connected to the outlet of the chilled water device via a connecting pipe. The first water inlet pipe is a small-diameter pipe, while the connecting pipe is a large-diameter pipe. An air vent valve is located above the connecting pipe, and the air vent valve is connected to the connecting pipe via a high-pressure needle valve. A drain valve is located at the bottom of the outer casing. The large diameter of the connecting pipe and the small diameter of the first water inlet pipe allow the water turbine to obtain greater water pressure and flow rate. The high-pressure needle valve, installed between the air vent valve and the connecting pipe, prevents difficulty in opening under high pressure and automatically vents air from the pipe during operation. The drain valve facilitates the removal of condensate from the device.

[0015] The flow rate of low-temperature chilled water in the first and second water turbines of this invention is 26-35 m³ / H, and the working pressure is 6.4 MPa. This allows this invention to achieve a better air supply cooling effect.

[0016] This utility model has a simple structure, is easy to implement, simple to install and operate, and has low manufacturing cost. Attached Figure Description

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is a three-dimensional schematic diagram of the internal structure of the mining low-temperature chilled water driven cooling and temperature reduction device of this utility model.

[0019] Figure 2 This is a three-dimensional schematic diagram of the internal structure of this utility model from another perspective.

[0020] Figure 3 This is a three-dimensional schematic diagram of the water turbine and fan structure of this utility model.

[0021] Figure 4 This is a three-dimensional schematic diagram of the outer shell structure of this utility model.

[0022] Figure 5 This is a three-dimensional schematic diagram of the appearance structure of this utility model. Detailed Implementation

[0023] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The shown is a mining low-temperature chilled water driven cooling and temperature reduction device, including a shell 1, a fan 2, a water turbine mechanism 3, and a heat exchanger mechanism 4. The shell 1 has a first air outlet 1-1 and a second air outlet 1-2 at its two ends, and an air inlet 1-3 on one side. The fan 2 includes a first fan 2-1 and a second fan 2-2, which are respectively located at the first air outlet 1-1 and the second air outlet 1-2. The heat exchanger mechanism 4 includes... The system includes a finned tube heat exchanger 4-1, a heat exchanger inlet pipe 4-2, and a heat exchanger outlet pipe 4-3. The finned tube heat exchanger 4-1 is located at the air inlet 1-3. The water turbine mechanism 3 includes a first water turbine 3-1, a first inlet pipe 3-2, a first outlet pipe 3-3, a second water turbine 3-4, a second inlet pipe 3-5, and a second outlet pipe 3-6. The first water turbine 3-1 and the second water turbine 3-4 are both located inside the outer casing 1. One end of the first inlet pipe 3-2 is connected to the first water turbine 3-6. 1. Inlet connection: The other end of the first inlet pipe 3-2 is connected to the outlet of the chilled water unit; one end of the first outlet pipe 3-3 is connected to the outlet of the first water wheel 3-1; the other end of the first outlet pipe 3-3 is connected to one end of the heat exchanger inlet pipe 4-2; the other end of the heat exchanger inlet pipe 4-2 is connected to the inlet of the finned tube heat exchanger 4-1; one end of the heat exchanger outlet pipe 4-3 is connected to the outlet of the finned tube heat exchanger 4-1; the heat exchanger outlet pipe 4... -3 is connected to one end of the second water inlet pipe 3-5, the other end of the second water inlet pipe 3-5 is connected to the water inlet of the second water wheel 3-4, the water outlet of the second water wheel 3-4 is connected to one end of the second water outlet pipe 3-6, the other end of the second water outlet pipe 3-6 is connected to the return water inlet of the chilled water device, the drive shaft of the first water wheel 3-1 is fixedly connected to the rotating shaft of the first fan 2-1, and the drive shaft of the second water wheel 3-4 is fixedly connected to the rotating shaft of the second fan 2-2.

[0024] As a preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the outer casing 1 is rectangular in shape. The first fan 2-1 and the second fan 2-2 are respectively disposed on the front end face and the rear end face of the outer casing 1. The outer casing 1 is provided with a first inspection door 5 and a second inspection door 6 corresponding to the positions of the first water wheel 3-1 and the second water wheel 3-4, respectively.

[0025] As a preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 5 As shown, the bottom of the outer shell 1 is provided with a base support 7, and the base support 7 is provided with a lifting hole 7-1. The bottom of the first water wheel 3-1 and the bottom of the second water wheel 3-4 are respectively provided with a first water wheel support 3-7 and a second water wheel support 3-8.

[0026] As a preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 5 As shown, the first water inlet pipe 3-2 is installed inside the outer casing 1. The first water inlet pipe 3-2 is connected to the outlet of the chilled water device through the connecting pipe 8. The first water inlet pipe 3-2 is a small-diameter water pipe, and the connecting pipe 8 is a large-diameter water pipe. An exhaust valve 9 is provided above the connecting pipe 8. The exhaust valve 9 is connected to the connecting pipe 8 through a high-pressure needle valve. A drain valve is provided at the bottom of the outer casing 1.

[0027] As a preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 3 As shown, the flow rate of the low-temperature chilled water in the first water turbine 3-1 and the second water turbine 3-4 is 26-35 m³ / H, and the working pressure is 6.4 MPa.

[0028] In operation, this invention works as follows: 1. High-pressure, low-temperature chilled water from the existing chilled water production unit in the coal mine enters the first water impeller 3-1 through the connecting pipe 8 and the first inlet pipe 3-2, driving the first water impeller 3-1 to rotate and blow air outwards. Then, the high-pressure, low-temperature chilled water flows from the outlet of the first water impeller 3-1 through the first outlet pipe 3-3 and the heat exchanger inlet pipe 4-2 into the finned tube heat exchanger 4-1 for heat exchange. Finally, the water flows through the heat exchanger outlet pipe 4-3 and the second inlet pipe 3-5 into the second water impeller 3-4, driving the second water impeller 3-4 to drive the second fan 2-2. The first water wheel rotates to blow air outwards, and finally, the water flows out from the outlet of the second water wheel 3-4 and returns to the chilled water production unit through the second outlet pipe 3-6; 2. When the first water wheel 3-1 drives the first fan 2-1 to rotate and the second water wheel 3-4 drives the second fan 2-2 to rotate, the first fan 2-1 and the second fan 2-2 respectively blow air far away to both ends, and the high-humidity and high-heat air is drawn into the windward side of the air inlet 1-3 on the side of this cooling device and passed through the finned tube heat exchanger 4-1 to cool, dehumidify, and dehumidify the air. The cooled air is then sent out by the first fan 2-1 and the second fan 2-2 respectively. In this way, the cooling device simultaneously blows cooling air from both ends in the coal mine shaft, realizing comprehensive cooling of the mining face.

[0029] In practical applications, the impeller and pump body are made entirely of stainless steel castings using a lost foam casting process. The fins and tubes are made of copper tubing and copper fins, specifically TP2 copper tubing and T2 copper foil. These materials offer excellent resistance to alkali and chlorine corrosion in mines, where humidity and temperature are high. Copper also inhibits the growth of some microorganisms and has strong resistance to sparks, preventing the formation of high-temperature sparks sufficient to ignite methane. The heat exchange tubes are made of copper, specifically 060 heat-treated copper tubing with a yield strength of 70 MPa or higher. Mechanical expansion and extrusion processes ensure the copper tubing and foil are fully expanded and tightly packed, achieving an interference fit of 0.15-0.2 mm. Further machining of the copper tubing further enhances its yield strength. The manifold is made of carbon steel or stainless steel, with end caps designed for high pressure resistance using a flat end cap structure. The end cap thickness meets high-pressure requirements. The steel manifold and copper branch pipes are welded using special welding wire and argon arc welding.

[0030] After testing, the water turbine of this utility model is suitable for a high working pressure of 6.4 MPa, with a flow rate of 26-35 m³ / H, a head pressure of 300-400 kPa, an output power of 2-3 kW, and a rotational speed of 1000-1400 RPM. The heat exchanger can be adapted to a maximum working pressure of 6.4 MPa. This utility model uses low-temperature chilled water as power during operation, and the cooling device simultaneously delivers cooling air from both ends, achieving comprehensive cooling of the mining face. It not only significantly improves heat exchange efficiency but also provides energy saving, explosion protection, economic reliability, and safe cooling, fully meeting the needs of safe coal mine production and achieving excellent practical results.

Claims

1. A mining low-temperature chilled water driven cooling and temperature reduction device, comprising a shell (1), a fan (2), a water turbine mechanism (3), and a heat exchanger mechanism (4), characterized in that: The outer casing (1) has a first air outlet (1-1) and a second air outlet (1-2) at both ends, and an air inlet (1-3) on one side. The fan (2) includes a first fan (2-1) and a second fan (2-2), which are respectively located at the first air outlet (1-1) and the second air outlet (1-2). The heat exchanger mechanism (4) includes a finned tube heat exchanger (4-1), a heat exchanger inlet pipe (4-2), and a heat exchanger outlet pipe (4-3). 4-3), the finned tube heat exchanger (4-1) is located at the air inlet (1-3), the water turbine mechanism (3) includes a first water turbine (3-1), a first water inlet pipe (3-2), a first water outlet pipe (3-3), a second water turbine (3-4), a second water inlet pipe (3-5), and a second water outlet pipe (3-6). The first water turbine (3-1) and the second water turbine (3-4) are both located inside the outer casing (1). One end of the first water inlet pipe (3-2) is connected to the water inlet of the first water turbine (3-1). One end of the water pipe (3-2) is connected to the outlet of the chilled water production unit. One end of the first outlet pipe (3-3) is connected to the outlet of the first water wheel (3-1). The other end of the first outlet pipe (3-3) is connected to one end of the heat exchanger inlet pipe (4-2). The other end of the heat exchanger inlet pipe (4-2) is connected to the inlet of the finned tube heat exchanger (4-1). One end of the heat exchanger outlet pipe (4-3) is connected to the outlet of the finned tube heat exchanger (4-1). The other end of the heat exchanger outlet pipe (4-3) is connected to... One end of the second water inlet pipe (3-5) is connected to the water inlet of the second water wheel (3-4), the other end of the second water inlet pipe (3-5) is connected to the water inlet of the second water wheel (3-4), the water outlet of the second water wheel (3-4) is connected to one end of the second water outlet pipe (3-6), the other end of the second water outlet pipe (3-6) is connected to the return water inlet of the chilled water device, the drive shaft of the first water wheel (3-1) is fixedly connected to the rotating shaft of the first fan (2-1), and the drive shaft of the second water wheel (3-4) is fixedly connected to the rotating shaft of the second fan (2-2).

2. The mining low-temperature chilled water driven cooling and temperature reduction device according to claim 1, characterized in that: The outer shell (1) is rectangular. The first fan (2-1) and the second fan (2-2) are respectively disposed on the front end face and the rear end face of the outer shell (1). The outer shell (1) corresponding to the positions of the first water wheel (3-1) and the second water wheel (3-4) is provided with a first inspection door (5) and a second inspection door (6).

3. The mining low-temperature chilled water driven cooling and temperature reduction device according to claim 1, characterized in that: The bottom of the outer shell (1) is provided with a base support (7), and the base support (7) is provided with a lifting hole (7-1). The bottom of the first water wheel (3-1) and the bottom of the second water wheel (3-4) are respectively provided with a first water wheel support (3-7) and a second water wheel support (3-8).

4. The mining low-temperature chilled water driven cooling and temperature reduction device according to claim 1, characterized in that: The first water inlet pipe (3-2) is installed inside the outer casing (1). The first water inlet pipe (3-2) is connected to the outlet of the chilled water device through the connecting pipe (8). The first water inlet pipe (3-2) is a small-diameter water pipe, and the connecting pipe (8) is a large-diameter water pipe. An exhaust valve (9) is provided above the connecting pipe (8). The exhaust valve (9) is connected to the connecting pipe (8) through a high-pressure needle valve. A drain valve is provided at the bottom of the outer casing (1).

5. The mining low-temperature chilled water driven cooling and temperature reduction device according to claim 1, characterized in that: The flow rate of the low-temperature chilled water in the first water turbine (3-1) and the second water turbine (3-4) is 26-35 m³ / H, and the working pressure is 6.4 MPa.

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