Portable cooling device for underground mining

Abstract

The utility model belongs to the technical field of underground mining equipment, and particularly relates to a portable cooling device for underground mining, which comprises a shell, flame-retardant sound-insulation cotton is fixedly connected in the shell, the inner end face of the flame-retardant sound-insulation cotton is uniformly distributed in a conical block shape, a vortex tube is arranged in the flame-retardant sound-insulation cotton, and the vortex tube is provided with a cooling device. The two ends of the vortex tube are installed in the shell through a first box partition plate and a second box partition plate, the shell is divided into a high-temperature area and a low-temperature area, the vortex tube is connected with an air inlet pipe, and the other end of the air inlet pipe is connected with a compressed air device. The shell is connected with a hot air pipeline assembly, one end of the hot air pipeline assembly is communicated with the high-temperature area, the other end of the hot air pipeline assembly extends to a mine mouth area, the shell is connected with a cold air pipeline assembly, one end of the cold air pipeline assembly is communicated with the low-temperature area, and the other end of the cold air pipeline assembly extends to the bottom of a mine. The mine bottom cooling device is favorable for quickly cooling the mine bottom.

Description

Technical Field

[0001] This utility model belongs to the technical field of underground mining equipment, and in particular relates to a portable cooling device for underground mining. Background Technology

[0002] Underground mining requires ventilation operations at the tunneling face. The tunneling face is usually located deep underground and is affected by geothermal heat, so the ventilation gas needs to be cooled to reduce the temperature of the working face. Only by controlling the working face temperature to a comfortable level can people work safely underground.

[0003] Since the tunnel face is generally located deep underground, the mine temperature is higher than the surface temperature due to geothermal influence, especially in summer or in areas with high air temperatures. The temperature at the bottom of the mine will increase further, necessitating cooling of the mine for subsequent mining operations. For example, a prior application with publication number CN112267910A discloses a mine cooling device that primarily cools the mine by pumping in cooling water and using wind power. However, this method requires a large amount of water resources in the mine area. Other mine cooling methods mainly include direct ventilation, installing refrigeration devices at the bottom of the mine, or installing refrigeration devices on the surface to transport cool air to the mine surface. If direct ventilation is used, the air temperature delivered to the bottom of the mine will be high when the ground temperature is high, making it difficult to achieve a cooling effect. If the refrigeration unit is installed directly at the bottom of the mine, it is not convenient to transport the refrigeration equipment into the mine, it is noisy, and the dust in the mine reduces the service life of the refrigeration equipment. If the refrigeration unit is installed on the ground to transport cold air to the bottom of the mine, the mine is generally deep, and there is a lot of heat exchange between the transport pipe and the external environment when transporting cold air. As a result, the cooling capacity at the bottom of the mine is greatly reduced, making it difficult to ventilate and cool the bottom of the mine.

[0004] Therefore, those skilled in the art are dedicated to providing a portable cooling device for underground mining that facilitates rapid cooling of the bottom of the mine. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a portable cooling device for underground mining, which is conducive to rapid cooling of the bottom of the mine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A portable cooling device for underground mining includes an outer shell, inside which flame-retardant and sound-insulating cotton is fixedly connected. The inner end face of the flame-retardant and sound-insulating cotton is uniformly distributed in conical blocks. A vortex tube is provided inside the flame-retardant and sound-insulating cotton. The two ends of the vortex tube are installed inside the outer shell through a first box partition and a second box partition, which divides the outer shell into a high-temperature zone and a low-temperature zone. The vortex tube is connected to an air inlet pipe, and the other end of the air inlet pipe is connected to a compressed gas device.

[0008] A hot air pipe assembly is connected to the outer shell, with one end of the hot air pipe assembly connected to the high-temperature zone and the other end extending to the mine entrance area. A cold air pipe assembly is connected to the outer shell, with one end of the cold air pipe assembly connected to the low-temperature zone and the other end extending to the bottom of the mine.

[0009] The beneficial effects of adopting the above scheme are: the compressed gas assembly is used to provide high-pressure gas into the vortex tube. After the high-pressure gas flows at high speed in the vortex tube, it forms high-temperature gas and low-temperature gas. The high-temperature gas is introduced into the high-temperature zone and then discharged to the mine entrance area through the hot gas pipeline assembly, while the low-temperature gas is introduced into the low-temperature zone and then transported to the bottom of the mine through the cold gas pipeline assembly for cooling and ventilation of the bottom of the mine, thereby reducing the temperature at the bottom of the mine.

[0010] The outer casing is placed in the middle of the mine, and the compressed gas device can be installed on the ground. The compressed gas generated by the compressed gas device is connected to the vortex tube through the air inlet pipe. It requires fewer equipment parts, requires less maintenance, and the air inlet pipe does not require an additional partition.

[0011] The first and second enclosure partitions divide the interior of the shell into a high-temperature zone and a low-temperature zone. The space between the first and second enclosure partitions is used to install vortex tubes and also serves as a buffer zone between the high-temperature zone and the low-temperature zone to reduce heat exchange between the two zones.

[0012] Flame-retardant sound-insulating cotton is used to reduce the noise generated by vortex tubes.

[0013] Preferably, the hot air pipe assembly includes a hot air channel fixedly connected to the outer end of the housing, and the hot air channel communicates with the high temperature zone, and a first temperature sensor is fixedly connected to the outer end of the hot air channel.

[0014] The advantages of adopting the above scheme are: the hot gas pipeline is used to transport the hot gas generated by the vortex tube to the mine entrance, and the first temperature sensor is used to detect the temperature of the high-temperature gas, which is beneficial for subsequent regulation of the flow rate entering the vortex tube.

[0015] Preferably, the cold air duct assembly includes a cold air channel fixedly connected to the outer casing, the cold air channel communicating with the low temperature zone, and a second temperature sensor fixedly connected to the cold air channel.

[0016] The advantages of adopting the above scheme are: the cold air pipe is used to transport the cold air generated by the vortex tube to the bottom of the mine, and the second temperature sensor is used to detect the temperature of the low-temperature gas, which is beneficial to the subsequent regulation of the flow rate entering the vortex tube.

[0017] Preferably, a ball valve is installed on the air intake pipe.

[0018] The beneficial effect of adopting the above scheme is that the ball valve is used to control the flow rate of compressed gas entering the vortex tube.

[0019] Preferably, a PVC board is provided between the flame-retardant sound insulation cotton and the outer shell, the PVC board is fixedly connected to the flame-retardant sound insulation cotton, and the PVC board is snapped onto the outer shell.

[0020] The beneficial effect of adopting the above solution is that the PVC board further reduces the noise generated by the vortex tube.

[0021] Preferably, a handle is fixedly connected to the outer end of the outer casing.

[0022] The advantage of adopting the above solution is that the handle facilitates the overall movement of the outer casing and the equipment inside the casing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first cross-section of the present invention;

[0024] Figure 2 This is a schematic diagram of the second cross-section structure of the present invention.

[0025] In the diagram: 1. Vortex tube; 2. Outer shell; 3. Flame-retardant and sound-insulating cotton; 4. Hot air passage; 5. Cold air passage; 6. First enclosure partition; 7. Air inlet pipe; 8. Ball valve; 9. Second enclosure partition; 10. First temperature sensor; 11. Second temperature sensor; 12. Handle. Detailed Implementation

[0026] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments.

[0027] Reference Figure 1 and Figure 2A portable cooling device for underground mining includes an outer shell 2. Flame-retardant and sound-insulating cotton 3 is fixedly connected inside the outer shell 2. The inner end face of the flame-retardant and sound-insulating cotton 3 is uniformly distributed in a conical shape. A vortex tube 1 is provided inside the flame-retardant and sound-insulating cotton 3. The two ends of the vortex tube 1 are installed inside the outer shell 2 through a first box partition 6 and a second box partition 9, which divides the outer shell 2 into a high-temperature zone and a low-temperature zone. The vortex tube 1 is connected to an air inlet pipe 7, and the other end of the air inlet pipe 7 is connected to a compressed gas device. A hot air pipe assembly is connected to the outer shell 2, with one end of the hot air pipe assembly communicating with the high-temperature zone and the other end extending to the mine entrance area. A cold air pipe assembly is connected to the outer shell 2, with one end of the cold air pipe assembly communicating with the low-temperature zone and the other end extending to the bottom of the mine.

[0028] In this embodiment, a compressed gas device (not shown in the figure) installed on the ground generates high-pressure gas, typically at a pressure of 0.2 MPa to 0.7 MPa. The compressed gas enters the vortex tube 1 through the inlet pipe 7. To improve the conversion efficiency of the compressed gas, multiple parallel vortex tubes 1 can be installed. After the compressed gas continuously and rapidly circulates within the vortex tube 1, it generates high-temperature gas and low-temperature gas. The high-temperature gas and low-temperature gas enter the high-temperature zone and low-temperature zone, respectively. The hot gas pipeline assembly and the cold gas pipeline assembly respectively transport the high-temperature gas and low-temperature gas to the mine entrance area and discharge them to the bottom of the mine. The low-temperature gas is used for ventilation and cooling at the bottom of the mine. The first housing partition 6 and the second housing partition 9 divide the interior of the outer shell 2 into a high-temperature zone and a low-temperature zone. The space between the first housing partition 6 and the second housing partition 9 is used to install the vortex tube 1 and also serves as a buffer zone between the high-temperature zone and the low-temperature zone, reducing heat exchange between the two zones. Flame-retardant sound-insulating cotton 3 is used to reduce the noise generated during the operation of the vortex tube 1.

[0029] like Figure 1 , Figure 2 As shown, in some embodiments, the hot air duct assembly includes a hot air channel 4 fixedly connected to the outer end of the housing 2, and the hot air channel 4 communicates with the high-temperature zone. A first temperature sensor 10 is fixedly connected to the outer end of the hot air channel 4. In specific installation, a heat insulation layer may be installed on the outer layer of the hot air channel 4. The cold air duct assembly includes a cold air channel 5 fixedly connected to the housing 2, and the cold air channel 5 communicates with the low-temperature zone. A second temperature sensor 11 is fixedly connected to the cold air channel 5, and a heat insulation layer is installed on the outer layer of the cold air channel 5 to reduce heat exchange between the cold air channel 5 and the outside.

[0030] In this embodiment, the temperature signal of the hot air channel 4 is collected by the first temperature sensor 10, and the temperature information of the cold air channel 5 is collected by the second temperature sensor 11. The collected temperature information is then transmitted to the control device (not shown in the figure). The control device automatically controls the amount of compressed air input into the vortex tube 1 according to the temperature information, so that both the low-temperature gas and the high-temperature gas are kept within a reasonable temperature range.

[0031] A ball valve 8 is installed on the intake pipe 7. The ball valve 8 is used to manually control the flow rate of compressed gas entering the vortex pipe 1. When the control device cannot adjust automatically, it can be adjusted manually through the ball valve 8.

[0032] like Figure 1 , Figure 2 As shown, in other embodiments, a PVC board is provided between the flame-retardant sound insulation cotton 3 and the outer shell 2. The PVC board is fixedly connected to the flame-retardant sound insulation cotton 3 and is snapped onto the outer shell 2. A handle 12 is fixedly connected to the outer end of the outer shell 2. By using the snapping method between the flame-retardant sound insulation cotton 3 and the outer shell 2, the flame-retardant sound insulation cotton 3 can be removed from the outer shell 2. The handle 12 is used to move the outer shell 2.

[0033] Working principle: Compressed air generated by the compressed gas device (not shown in the figure) is introduced into the vortex tube 1. After the compressed gas continuously circulates in the vortex tube 1, it generates high-temperature gas and low-temperature gas. The high-temperature gas and low-temperature gas enter the high-temperature zone and the low-temperature zone respectively. The hot gas pipeline assembly and the cold gas pipeline assembly transport the high-temperature gas and the low-temperature gas to the mine outlet and the bottom of the mine respectively. The low-temperature gas is used for ventilation and cooling at the bottom of the mine. During the operation of the vortex tube 1, the conical structure of the flame-retardant sound insulation cotton 3 is used to increase the sound absorption range. At the same time, the flame-retardant sound insulation cotton 3 itself is used to further reduce noise intensity.

[0034] The above description is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed by the utility model, based on the technical solution and the utility model concept, should be included within the protection scope of the utility model.

[0035] The description briefly mentions the application direction of the utility model in relation to existing technologies known to those skilled in the art without modification, and combines them with the utility model to form a complete technology; it avoids excessive popularization of technologies known to those skilled in the art, in order to help those skilled in the art quickly understand the main content of the utility model.

Claims

1. A portable cooling device for underground mining, characterized in that: Includes an outer shell (2), inside which flame-retardant sound insulation cotton (3) is fixedly connected. The inner end face of the flame-retardant sound insulation cotton (3) is evenly distributed in a conical shape. Inside the flame-retardant sound insulation cotton (3), there is a vortex tube (1). The two ends of the vortex tube (1) are installed inside the outer shell (2) through the first box partition (6) and the second box partition (9) and divide the outer shell (2) into a high temperature zone and a low temperature zone. The vortex tube (1) is connected to an air inlet pipe (7) and the other end of the air inlet pipe (7) is connected to a compressed gas device. A hot air pipe assembly is connected to the outer shell (2), and one end of the hot air pipe assembly is connected to the high temperature zone, while the other end extends to the mine entrance area. A cold air pipe assembly is connected to the outer shell (2), and one end of the cold air pipe assembly is connected to the low temperature zone, while the other end extends to the bottom of the mine.

2. The portable cooling device for underground mining according to claim 1, characterized in that: The hot air pipe assembly includes a hot air channel (4) fixedly connected to the outer end of the outer shell (2), and the hot air channel (4) is connected to the high temperature zone. A first temperature sensor (10) is fixedly connected to the outer end of the hot air channel (4).

3. A portable cooling device for underground mining according to claim 2, characterized in that: The cold air duct assembly includes a cold air channel (5) fixedly connected to the outer shell (2), the cold air channel (5) is connected to the low temperature zone, and a second temperature sensor (11) is fixedly connected to the cold air channel (5).

4. A portable cooling device for underground mining according to claim 1, characterized in that: A ball valve (8) is installed on the air intake pipe (7).

5. A portable cooling device for underground mining according to claim 1, characterized in that: A PVC board is provided between the flame-retardant sound insulation cotton (3) and the outer shell (2). The PVC board is fixedly connected to the flame-retardant sound insulation cotton (3) and is snapped onto the outer shell (2).

6. A portable cooling device for underground mining according to claim 1, characterized in that: A handle (12) is fixedly connected to the outer end of the outer shell (2).

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