Air cooling system for mining working face

Abstract

The utility model discloses an excavation working face air cooling system which comprises a roadway, a cooling liquid input pipeline and a cooling liquid output pipeline, the cooling liquid input pipeline and the cooling liquid output pipeline are arranged in the roadway, the cooling liquid input pipeline is communicated with the cooling liquid output pipeline through a plurality of coolers, and the coolers are used for collecting heat in the roadway. And the heat is transmitted to the outside of the roadway through the cooling liquid output pipeline. By adopting the heat insulation layer, the speed and the total amount of heat released to the roadway air by the coal seam and the rock stratum are reduced, the cooling load of the cooling system of the mining working face is reduced, and the power consumption of the cooling system of the mining working face is reduced. The cooling liquid in the cooler is not in contact with the airflow air of the mining working face, so that the temperature of the inlet air of the mining working face after cooling is reduced, the humidity in the air is also reduced, the consumption of the cooling liquid is reduced, the cool feeling of field staff is increased, and the operation and maintenance cost is low; the cooler serving as core equipment is small in size, light in weight and flexible and convenient to mount, dismount and move.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to an air cooling system for a mining working face. Background Art

[0002] The existing air cooling system for mining working faces requires a large dedicated site for fixed installation due to the high power, large size and heavy weight of the equipment. Once in operation, it cannot be dismantled and moved. Therefore, the air cooling station for mining working faces is set at the air inlet far away from the mining working face, and spray cooling water or fan air cooler are used to perform one-time centralized cooling of the incoming air of the mining working face. Since the cooling station is far away from the mining working face, the cooled air returns to its previous temperature after the temperature rises in the long-distance tunnel, which loses the cooling effect and significance.

[0003] In addition, the spray cooling water cooling technology has direct contact with the wind flow of the working face. On the one hand, the cooling water is carried away by the wind flow, and the consumption is too large. On the other hand, it increases the air humidity in the wind flow of the mining working face, making the workers feel hot and humid. The fan air cooler cooling requires running a high-power fan 24 hours a day, which not only consumes a lot of electricity, has high operating costs and a large maintenance workload, but also produces a lot of noise when running, resulting in a bad working environment. Utility Model Content

[0004] One of the main purposes of the utility model is to overcome at least one defect in the prior art and provide an air cooling system for mining working face. In the utility model, firstly, a heat insulation layer is set to delay and reduce the speed and amount of heat released from coal seams and rock strata into the air of the tunnel; secondly, according to the superconducting technical characteristics of heat pipes for heat and the special working environment of coal mines, a single heat pipe cooler, a single sleeve cooler and a U-tube cooler with small size, light weight, high thermal conductivity and can be installed separately are designed, which is convenient for the installation, disassembly and movement of the cooler, and the cooler can be arranged close to the working face in advance or directly arranged in the workplace that needs to be cooled, thereby improving the practical effect of the cooling system, reducing the power consumption and operation and maintenance costs of the cooling system, reducing the humidity of the air in the mining working face, reducing the noise in the workplace, and improving the working environment of the staff.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] According to one aspect of the utility model, an air cooling system for a mining working face is provided, comprising a tunnel, a coolant input pipe and a coolant output pipe arranged in the tunnel, the coolant input pipe and the coolant output pipe being connected through a plurality of coolers, the coolers being used to collect heat in the tunnel, and the coolant output pipe transferring the heat to the outside of the tunnel.

[0007] According to one embodiment of the utility model, the tunnel includes an excavation working face tunnel and a coal mining working face tunnel.

[0008] According to one embodiment of the utility model, the inner wall of the tunnel is provided with a heat insulation layer to block or reduce the speed and amount of heat released from the inner wall of the tunnel to the air in the tunnel. The heat insulation layer refers to a heat insulation material layer sprayed, poured or pasted on the top plate, bottom plate and both sides of the tunnel; the heat insulation material layer is preferably a fire-resistant and heat-insulating A / B mixed foaming coagulant, filler, polyurethane, thermal insulation cotton, rubber, wallpaper, etc.

[0009] According to one embodiment of the utility model, the cooler is fixed by a suspension device; the suspension device includes an anchor rod, an anchor rod hook, an anchor rod nut, and a suspension component, the anchor rod is arranged on the top plate of the tunnel, the anchor rod hook is fixed to the end of the anchor rod by the anchor rod nut, and the suspension component is fixed to the anchor rod hook; wherein the suspension component adopts a suspension chain, a suspension rope or a suspension beam; the anchor rods are anchored in rows on the top plate of the tunnel according to the position where the cooler needs to be installed.

[0010] According to one embodiment of the utility model, the coolant input pipeline and the coolant output pipeline are laid along the roadway to the working surface and the workplace that needs to be cooled, and the external interfaces of the coolant input pipeline and the coolant output pipeline are respectively connected to the coolant pipeline underground;

[0011] At the locations where coolers and / or corresponding cooler suspension devices need to be installed in the tunnel of the mining working face, combined valves are installed on the coolant input pipeline and the coolant output pipeline respectively.

[0012] According to one embodiment of the utility model, the combined valve is a three-way component composed of two valves of different diameters, the straight pipe of the three-way component is the main pipeline, which has a large diameter and connecting flanges at both ends;

[0013] A main valve is arranged between the flanges at both ends of the straight pipe, and a three-way small valve is arranged vertically on the main pipeline between the main valve and one end flange. One port of the small valve is fixed on the main pipeline and communicated with the main pipeline, and a quick connector is arranged on the other port of the small valve.

[0014] According to one embodiment of the utility model, the heat exchange method of the cooler is tube wall heat exchange; according to the superconducting characteristics of the heat pipe to heat and the special working environment underground in the coal mine, a single heat pipe cooler, a single sleeve cooler and a U-tube cooler with small size, light weight, high thermal conductivity, and the ability to be installed and moved separately can be selected.

[0015] According to one embodiment of the utility model, the single heat pipe cooler includes a heat pipe, an evaporator, a hook, a spiral guide vane or guide ball, heat dissipation fins, a liquid inlet, and a liquid outlet; a heat dissipation fin is provided on the lower tube body of the heat pipe, the upper part of the heat pipe is inserted into the evaporator, a hook is provided on the top of the evaporator, the lower end of the evaporator is sealed and connected to the heat pipe tube body, a spiral guide vane or guide ball is provided between the inner wall of the evaporator and the heat pipe tube body, a liquid inlet is provided at the lower part of the evaporator, and a liquid outlet is provided at the upper part of the evaporator. After the coolant enters the evaporator from the liquid inlet, it flows upward along the gap between the spiral guide vanes or guide balls and flows out from the coolant outlet to realize heat exchange.

[0016] According to one embodiment of the utility model, the single-piece jacket cooler comprises an outer tube, an inner tube, heat dissipation fins, a spiral guide vane or guide ball, an inner tube bracket, a hook, a liquid inlet, and a liquid outlet; the outer tube and the inner tube are sleeved together, the outer tube and the inner tube are arranged on the same axial line, a heat dissipation fin is arranged outside the outer tube body, and the bottom of the outer tube is sealed; the lower opening of the inner tube is open and a spacing is left between it and the bottom of the outer tube, and the lower end of the inner tube is fixedly connected to the inner wall of the outer tube by an inner tube bracket; the upper end of the outer tube is sealed and fixedly connected to the inner tube body, a liquid outlet is arranged at the top end of the outer tube, a liquid inlet and a hook are arranged at the top end of the inner tube, and a spiral guide vane or guide ball is arranged between the inner tube and the outer tube, the coolant enters the inner tube from the liquid inlet, then flows downward from the lower opening of the inner tube to the bottom of the outer tube, and then flows upward from the gap between the spiral guide vanes or guide balls between the inner tube and the outer tube to the top end of the outer tube and flows out from the liquid outlet.

[0017] According to one embodiment of the utility model, the U-shaped tube cooler includes a U-shaped tube, heat dissipation fins, spiral guide vanes or guide balls, a bracket, a hook, a liquid inlet, and a liquid outlet. The U-shaped tube body is provided with heat dissipation fins outside, and the U-shaped tube is provided with a spiral guide vane or guide ball inside. One of the two tube openings at the top of the U-shaped tube is a liquid inlet and the other is a liquid outlet. The liquid inlet and the liquid outlet are fixedly connected by a bracket, and a hook is provided upward in the middle of the bracket.

[0018] According to one embodiment of the utility model, the height of the cooler is less than the height of the laneway at the installation location, and all coolers are suspended on the suspension member of the cooler suspension device through the hook on the top thereof. The cooler can swing in any direction and angle with the contact point between the top hook and the suspension member as the center; the cooler is in a naturally drooping state during normal operation, and when a worker or a vehicle passes by, the lower end of the cooler can be raised, and then lowered after the worker or the vehicle passes, to restore the naturally drooping working state.

[0019] According to another aspect of the utility model, a method for installing the air cooling system of the mining working face is provided, wherein a set of cooler suspension devices is fixed on the top plate of each position where a cooler needs to be installed in the mining working face tunnel; a coolant input pipeline and a coolant output pipeline are laid in parallel along the tunnel toward the working face, and a combination valve is installed on the coolant input pipeline and the coolant output pipeline at each position where a cooler or / and a corresponding cooler suspension device needs to be installed, wherein the main valve on the combination valve is located at the top of the main pipeline; a plurality of coolers are respectively suspended on the suspension components of different cooler suspension devices, and the coolers on the same suspension component are connected in series through a connecting pipe, and the water inlet of the coolers connected in series on the same suspension component is connected to the small valve quick connector of the combination valve on the coolant input pipeline through a connecting pipe, and the liquid outlet of the coolers connected in series is connected to the small valve quick connector of the combination valve on the coolant output pipeline through a connecting pipe; the external interfaces of the coolant input pipeline and the coolant output pipeline are respectively connected to the coolant pipe network system.

[0020] According to another aspect of the utility model, the working process of the air cooling system for the mining working face is to open all the valves on the pipeline of the coolant input pipeline, and only close the main valve on the last combination valve on the coolant input pipeline in the tunnel, and open all the valves on the pipeline of the coolant output pipeline, and only close the main valve on the last combination valve on the coolant output pipeline in the tunnel. At this time, the coolant flows from the inlet pipe of the coolant pipe network, through the three-way small valve on the first combination valve on the coolant input pipeline in the tunnel---connecting pipe---first The first cooler inlet---after absorbing heat from the airflow in the lane by the first cooler and releasing cold, it flows out from the first cooler outlet---connecting pipe---the second cooler inlet---after absorbing heat from the airflow in the lane by the second cooler and releasing cold, it flows out from the second cooler outlet---connecting pipe---the third cooler inlet... and so on, the coolant flows out from the outlet of the last cooler in each row---connecting pipe---the three-way small valve of the combination valve---the coolant output pipeline in the lane---the return pipe of the coolant network. A part of the coolant in the coolant input pipeline in the lane absorbs heat and releases cold energy through the first row of coolers and flows back to the coolant output pipeline, and the other part passes through the main valve on the combination valve and enters the three-way small valve on the next combination valve... and so on, the last part of the coolant in the coolant input pipeline enters the three-way small valve on the last combination valve, passes through the last row of coolers to absorb heat and release cold energy, enters the coolant output pipeline and flows back to the coolant network. After the air flow in the alley absorbs heat through the first row of coolers, it will cool down and condense into condensate to reduce the humidity and temperature of the air. As the air in the alley continues to flow, it passes through the second row, the third row...the last row of coolers, absorbing heat and releasing cold to reduce the temperature and humidity of the air in the alley.

[0021] It can be seen from the above technical solution that the utility model has at least one of the following advantages and positive effects:

[0022] In the utility model, the use of a heat insulating layer reduces the speed and total amount of heat released from the coal seam and rock stratum into the tunnel air, reduces the cold load of the mining face cooling system, and reduces the power consumption of the mining face cooling system.

[0023] The coolant in the cooler does not contact the wind flow of the mining face. After cooling, not only the temperature of the incoming air at the mining face is reduced, but the humidity in the air is also reduced, which reduces the consumption of coolant and increases the coolness of on-site workers. Compared with the fan air cooler cooling system, the utility model eliminates electrical equipment and mechanical operating equipment, and has low operating and maintenance costs. The cooler as the core equipment is small in size, light in weight, and flexible and convenient to install, disassemble and move. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a top view schematic diagram of the distribution and connection of coolers in the air cooling system for a mining working face described in the utility model;

[0026] Figure 2 This is a schematic diagram of the front view of the suspension installation of the cooler described in the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the utility model combined valve;

[0028] Figure 4 This is a schematic diagram of the structure of the single-body jacket cooler of the utility model;

[0029] Figure 5 This is a bottom view of the inner tube bracket of the single-body jacket cooler of the utility model;

[0030] The following are marked in the figure:

[0031] 1—cooler, 11—cooler water inlet, 12—cooler water outlet, 13—cooler hook, 14—cooler fin, 15—spiral guide vane, 16—outer pipe, 17—inner pipe, 18—bracket, 2—connecting pipe, 3—water inlet pipe, 4—water inlet pipe combination valve, 5—return pipe, 6—return pipe combination valve, 7—tunnel, 71—tunnel top plate, 72—tunnel bottom plate, 73—tunnel upper wall, 74—tunnel lower wall, 8—cooler suspension device, 81—anchor rod, 82—tray, 83—anchor rod hook, 84—anchor rod nut, 85—suspension chain, 91—straight pipe, 92—connecting flange, 93—tee component, 94—main valve, 95—small valve, 96—quick connector, 100—working surface. DETAILED DESCRIPTION

[0032] In the description of the present invention, unless otherwise specified, "multiple" means two or more. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or device referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to describe the embodiments of the utility model described here.

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] See attached Figure 1-5 As shown, the coolant in this application is cooling water. The external interface of the cooling water inlet pipe 3 is connected to the inlet pipe of the cooling water network in the coal mine. A plurality of inlet combination valves 4 are installed on the cooling water inlet pipe 3 in the tunnel of the mining working face. The main valve 94 of the combination valve 4 is at the outlet end of the straight pipe 91, and the three-way component 93 and the small valve 95 of the combination valve 4 are at the inlet end of the main valve 94. The external interface of the cooling water return pipe 5 is connected to the return pipe of the cooling water network in the coal mine. A plurality of return combination valves 6 are installed on the cooling water return pipe 5 in the tunnel of the mining working face. The main valve 94 of the combination valve 6 is at the inlet end of the straight pipe 91, and the three-way component 93 and the small valve 95 of the combination valve 6 are at the return end of the straight pipe 91.

[0037] like Figure 2 As shown, anchor rods 81 are anchored on the top plate 71 of the tunnel 7 at the required positions, and trays 82 and anchor rod hooks 83 are connected in series at the bottom of the anchor rods 81, and finally tightened and fixed with anchor rod nuts 84. A suspension chain 85 is suspended and fixed to each anchor rod hook 83 of the same row of anchor rods 81.

[0038] like Figure 1 As shown, the coolers 1 to be installed in each row are respectively hung on the same hanging chain 85 through the cooler hooks 13. The cooling water inlet 11 of the first cooler 1 in each row is connected to the quick connector 96 on the combination valve 4 of the cooling water inlet pipe 3 through the connecting pipe 2, and the water outlet 12 of the first cooler 1 is connected to the water inlet 11 of the second cooler 1 through the connecting pipe 2, and the water outlet 12 of the last cooler 1 in each row is connected to the quick connector 96 on the cooling water return combination valve 6 through the connecting pipe 2.

[0039] The present application discloses a working process of an air cooling system for an excavation working face, wherein cooling water of the air cooling system for the excavation working face enters a cooling water inlet pipe 3 in the mining working face tunnel from an external pipe network, enters the water inlet 11 of the first cooler 1 in each row through a plurality of cooling water inlet combination valves 4 and a connecting pipe 2 respectively, absorbs heat in the airflow of the mining working face tunnel 7 through the heat dissipation fins 14 of the first cooler, and then flows out from the water outlet 12 of the first cooler 1, and then enters the water inlet 11 of the second cooler 1 through the second connecting pipe 2, absorbs heat in the airflow of the mining working face tunnel 7 through the heat dissipation fins 14 of the second cooler, and then flows out from the water outlet 12 of the second cooler, and so on until the last cooler fin 14 of each row of coolers 1 absorbs heat in the airflow of the mining working face tunnel 7, and the cooling water flows out from the water outlet 12 of the last cooler 1, and then enters the return pipe 4 through the connecting pipe 2 and the return water combination valve 6, and finally flows back to the external pipe network of cooling water.

[0040] As the tunnel 7 of the excavation working face is continuously excavated and extended, a cooler suspension device 8 is installed on the tunnel roof 71 at the new place where the cooler 1 needs to be installed; a cooling water inlet pipe 3 is laid between the previous cooler suspension device 8 and the new cooler suspension device 8, and the outer port of the newly laid cooling water inlet pipe 3 is connected to the connecting flange 92 on the straight pipe 91 of the inlet pipe combination valve 4 through the connecting flange 92, and a new inlet pipe combination valve 4 is installed on the terminal of the newly laid cooling water inlet pipe 3. During installation, the three-way component 93 on the inlet pipe combination valve 4 should be located at the main The water inlet end of the valve 94; the extension laying method of the cooling water return pipe 5 is the same as the laying method of the cooling water inlet pipe 3; then the coolers 1 are hung on the hanging chain 85 in turn, and the coolers 1 are connected in series in turn using the connecting pipe 2 from the quick connector 96 at the port of the small valve 95 on the inlet pipe combination valve 4, and finally connected to the quick connector 96 at the port of the small valve 95 on the return pipe combination valve 6, and finally the main valves 94 on the newly installed inlet pipe combination valve 4 and the return pipe combination valve 6 are closed respectively, and the main valves 94 on the upper-level combination valves are opened respectively. At this time, the cooling water enters the newly laid cooling water inlet pipe 3 from the upper level inlet pipe combination valve 4, the newly installed inlet pipe combination valve 4, the three-way valve 93, the small valve 95, the connecting pipe 2, the first cooler 1 ... the last cooler 1, the connecting pipe 2, the quick connector 96, the newly installed return pipe combination valve 6, the small valve 95, the three-way component 93 and the cooling water return pipe 5. At this time, the newly installed cooler 1 is in the cooling working state.

[0041] As the coal mining face is mined and produced, the tunnel 7 of the coal mining face will be continuously shortened, and it is necessary to continuously remove the coolers 1 in rows from the inside to the outside; each time the last row of coolers 1 is removed, the main valves 94 on the upper-level water inlet pipe combination valve 4 and the return pipe combination valve 6 must be closed first, all connecting flanges 96 after the water inlet pipe combination valve 4 and the return pipe combination valve 6 must be disconnected, all connecting pipes 2 must be removed, the coolers 1 must be removed, the suspension chains 85 must be removed, the anchor nuts 84 must be loosened, and the anchor hooks 83 and the trays 82 must be retracted.

[0042] The working process of the air cooling system for a mining working face described in the utility model shows that the airflow of the mining working face is cooled layer by layer through several rows of coolers, and the cooling range is large, the cooling effect is good, and the needs of air cooling of the mining working face can be effectively guaranteed.

[0043] To sum up, compared with the existing centralized refrigeration station cooling system, the air cooling system for the mining face described in the utility model has a cooler that is easy to install and flexible in location, and can be installed at the work site that requires cooling. It has strong practicality and high efficiency in refrigeration and cooling. Compared with spray cooling, the air humidity is low, the employee comfort is good, and the cooling water consumption is low. Compared with the fan air cooler, it eliminates the fan, has no electrical equipment, and has no operating equipment, so it consumes less energy, has a small amount of operation and maintenance, and has a low operating cost.

[0044] It should be understood that the utility model does not limit its application to the detailed structure and arrangement of the components proposed herein. The utility model can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the utility model. It should be understood that the utility model disclosed and defined herein extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. The embodiments described herein illustrate the best known ways to implement the utility model and will enable those skilled in the art to utilize the utility model.

Claims

1. An air cooling system for a mining working face, comprising a tunnel, characterized in that: A coolant input pipe and a coolant output pipe are arranged in the tunnel, and the coolant input pipe and the coolant output pipe are connected through a plurality of coolers. The cooler is used to collect heat in the tunnel, and the coolant output pipe transmits the heat to the outside of the tunnel.

2. The air cooling system for a mining working face according to claim 1, characterized in that: The inner wall of the tunnel is provided with a heat insulation layer to block or reduce the speed and amount of heat released from the inner wall of the tunnel to the air in the tunnel.

3. The air cooling system for a mining working face according to claim 1 is characterized in that: The cooler is fixed by a suspension device; The suspension device includes an anchor rod, an anchor rod hook, an anchor rod nut, and a suspension component. The anchor rod is arranged on the roof of the tunnel. The anchor rod hook is fixed to the end of the anchor rod by the anchor rod nut, and the suspension component is fixed to the anchor rod hook; wherein the suspension component adopts a suspension chain, a suspension rope or a suspension beam; the anchor rods are anchored in rows on the roof of the tunnel according to the position where the cooler needs to be installed.

4. The air cooling system for a mining working face according to claim 1 is characterized in that: The cooling liquid input pipeline and the cooling liquid output pipeline are laid along the roadway to the working surface and the workplace that needs to be cooled, and the external interfaces of the cooling liquid input pipeline and the cooling liquid output pipeline are respectively connected to the cooling liquid pipeline underground; At the locations where coolers and / or corresponding cooler suspension devices need to be installed in the tunnels of the mining working face, combined valves are installed on the coolant input pipeline and the coolant output pipeline respectively; The combined valve is a three-way component composed of two valves of different diameters, the straight pipe of the three-way component is the main pipeline, its diameter is large and connecting flanges are arranged at both ends; A main valve is arranged between the flanges at both ends of the straight pipe, and a three-way small valve is arranged vertically on the main pipeline between the main valve and one end flange. One port of the small valve is fixed on the main pipeline and communicated with the main pipeline, and a quick connector is arranged on the other port of the small valve.

5. The air cooling system for mining working face according to claim 1, characterized in that: The cooler includes a single heat pipe cooler, a single sleeve cooler and a U-tube cooler. Each cooler is provided with a water inlet and a water outlet. The cooler tube body is provided with heat dissipation fins. Each cooler top is provided with a hook.

6. The air cooling system for a mining working face according to claim 5, characterized in that: The single heat pipe cooler comprises a heat pipe, an evaporator, a hook, a spiral guide vane or guide ball, a heat dissipation fin, a liquid inlet and a liquid outlet; a heat dissipation fin is arranged on the lower tube body of the heat pipe, the upper part of the heat pipe is inserted into the evaporator, a hook is arranged on the top of the evaporator, the lower end of the evaporator is sealedly connected to the tube body of the heat pipe, a spiral guide vane or guide ball is arranged between the inner wall of the evaporator and the tube body of the heat pipe, a liquid inlet is arranged at the lower part of the evaporator, and a liquid outlet is arranged at the upper part of the evaporator. After the coolant enters the evaporator from the liquid inlet, it flows upward along the gap between the spiral guide vanes or guide balls and flows out from the coolant outlet to realize heat exchange.

7. The air cooling system for a mining working face according to claim 5, characterized in that: The single-tube cooler comprises an outer tube, an inner tube, a heat dissipation fin, a spiral guide vane or a guide ball, an inner tube bracket, a hook, a liquid inlet and a liquid outlet; the outer tube and the inner tube are sleeved together, the outer tube and the inner tube are arranged on the same axis, a heat dissipation fin is arranged outside the outer tube body, and the bottom of the outer tube is sealed; the lower opening of the inner tube is open and a spacing is left between it and the bottom of the outer tube, and the lower end of the inner tube is fixedly connected to the inner wall of the outer tube by an inner tube bracket; the upper end of the outer tube is sealed and fixedly connected to the inner tube body, a liquid outlet is arranged at the top end of the outer tube, a liquid inlet and a hook are arranged at the top end of the inner tube, a spiral guide vane or a guide ball is arranged between the inner tube and the outer tube, the coolant enters the inner tube from the liquid inlet, then flows downward from the lower opening of the inner tube to the bottom of the outer tube, and then flows upward from the gap between the spiral guide vanes or the guide balls between the inner tube and the outer tube to the top end of the outer tube and flows out from the liquid outlet.

8. The air cooling system for a mining working face according to claim 5, characterized in that: The U-shaped tube cooler comprises a U-shaped tube, heat dissipation fins, spiral guide plates or guide balls, a bracket, a hook, a liquid inlet and a liquid outlet. The U-shaped tube body is provided with heat dissipation fins outside, and the U-shaped tube is provided with a spiral guide plate or a guide ball inside. One of the two tube openings at the top of the U-shaped tube is a liquid inlet and the other is a liquid outlet. The liquid inlet and the liquid outlet are fixedly connected by a bracket, and a hook is provided upward in the middle of the bracket.

9. The air cooling system for mining working face according to claim 2, characterized in that: The thermal insulation layer refers to a thermal insulation material layer that is sprayed, poured or pasted on the top plate, bottom plate and both sides of the tunnel.

10. The air cooling system for mining working face according to claim 9, characterized in that: The heat-insulating material layer adopts fire-resistant and heat-insulating A / B mixed foaming coagulant, filler, polyurethane, heat-insulating cotton, rubber and wallpaper.

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