Mine tunnel ventilation device

Abstract

The utility model provides a mine tunnel ventilation device, which relates to the technical field of mine tunnel ventilation and comprises a plurality of exhaust pipes and an air inlet pipe which are connected end to end in sequence. An exhaust fan is arranged in the middle of the surface of each exhaust pipe, an air inlet fan is arranged in the middle of the surface of each air inlet pipe, one exhaust pipe is used on one side of any air inlet pipe in a matched mode, the two rows of exhaust pipes and the two rows of air inlet pipes are assembled, and air inlets of the assembled air inlet pipes communicate with the outside of the tunnel to suck external fresh air. The exhaust fans on the exhaust pipes are started to send all harmful gas in the covered area in the tunnel into the exhaust pipes, the harmful gas is sent out of the tunnel through the exhaust pipes, the air inlet fans are started to send fresh outside air in the air inlet pipes into the tunnel in time, and ventilation in the tunnel can be achieved. And the harmful gas can be quickly exhausted by utilizing the exhaust fans on the plurality of exhaust pipes.

Description

Technical Field

[0001] This utility model relates to the field of mine tunnel ventilation technology, and in particular to a mine tunnel ventilation device. Background Technology

[0002] Mine tunnel ventilation is a key aspect of ensuring mine safety, improving production efficiency, and protecting miners' health. Tunnels may contain various harmful gases, such as methane, carbon monoxide, nitrogen dioxide, and dust. Ventilation systems can effectively dilute and expel these harmful gases, preventing poisoning and explosion accidents.

[0003] Therefore, a tunnel ventilation device, disclosed in CN220909744U, uses a locking block to engage with the connecting groove of another ventilation duct. A spring pushes a push plate and a push rod to engage a hook block with the limiting groove. This allows for quick connection and installation of two ventilation ducts, facilitating the installation of ventilation ducts according to requirements, adjusting the length of the ventilation ducts, and starting a fan to draw air through the outer casing and connecting pipes into the interior of the ventilation duct, which is then delivered to the tunnel for ventilation.

[0004] However, when the tunnel is ventilated, the harmful gases that accumulate inside the tunnel will move along the tunnel and eventually be discharged through the tunnel entrance. This prolongs the time that harmful gases stay in the tunnel, meaning they cannot be discharged quickly from the tunnel entrance, which can easily cause injury to people. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art by proposing a ventilation device for mine tunnels.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a ventilation device for a mine tunnel, comprising a plurality of exhaust pipes and inlet pipes, wherein the plurality of exhaust pipes and inlet pipes are arranged sequentially end to end, an exhaust fan is provided at the middle position of the surface of the exhaust pipe, an inlet fan is provided at the middle position of the surface of the inlet pipe, and an exhaust pipe is used in conjunction with one side of each inlet pipe, the inlet pipes and exhaust pipes used in conjunction are arranged in parallel, and a connecting shaft is provided between them at the inlet fan, the two ends of the connecting shaft are respectively rotatably connected to the surface of the inlet pipe and the exhaust pipe, and both ends are fixedly connected to a transmission bevel gear, one end of the fan blade shaft of the inlet fan and the exhaust fan is fixedly connected to an input bevel gear that meshes with the adjacent transmission bevel gear, and a flow guide is fixedly connected inside the exhaust pipe at the exhaust fan outlet, the air flow direction inside the flow guide is arranged parallel to the air flow direction inside the exhaust pipe.

[0007] Preferably, a first driving helical gear is fixedly connected through the end face of the input bevel gear, and a second driving helical gear, which meshes with the first driving helical gear, is rotatably connected inside both the exhaust pipe and the air inlet pipe.

[0008] Preferably, the two end faces of the driving helical gear are fixedly connected to a rotating shaft arranged along the length of the exhaust pipe, and rectangular bars are fixedly connected to both ends of the rotating shaft, and a tube is sleeved on the surface of the rectangular bar through a spring rod.

[0009] Preferably, the inner walls of the air inlet pipe and the air outlet pipe are fixedly connected to bearing seats at both ends of the rotating shaft and at the end of the insert, the rotating shaft is fixed to the inner ring of the bearing seat, and the insert is connected to the inner ring of the bearing seat through the shaft.

[0010] Preferably, the inner and outer walls of the insert are rectangular, and a connector is fixedly connected to the end of the insert away from the second driving helical gear. Among the two connectors in the same tube, one of the connectors is fixedly connected with two screws for insertion into the other connector.

[0011] Preferably, the insert inside the exhaust pipe is also slidably connected to the side of the air guide shroud through a bearing seat.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows.

[0013] 1. In this utility model, by setting up two rows of assembled exhaust pipes and air inlets, the air inlet of the assembled air inlet pipe is connected to the outside of the tunnel to draw in fresh air from the outside. The exhaust fan on the exhaust pipe is activated to send all the harmful gases in the area covered by the tunnel into the exhaust pipe and out of the tunnel through the exhaust pipe. Meanwhile, the air inlet fan is activated to send fresh outside air from the air inlet pipe into the tunnel in a timely manner, thus realizing ventilation and air exchange in the tunnel. By setting up several exhaust pipes and using the exhaust fans on several exhaust pipes, harmful gases can be quickly extracted.

[0014] 2. In this utility model, by setting a connecting shaft, a transmission bevel gear, and an input bevel gear, the exhaust pipe and the air inlet pipe used in conjunction only need to be powered on the exhaust fan in the exhaust pipe. The input bevel gear of its fan blade shaft rotates synchronously and at the same speed, and the transmission bevel gear that achieves meshing connection rotates. Under the connecting action of the connecting shaft, the transmission bevel gear at the air inlet fan rotates, and finally, under the meshing connection, the exhaust fan rotates and runs, which helps to reduce power consumption. Attached Figure Description

[0015] Figure 1 This utility model presents a three-dimensional structural diagram of a ventilation device for a mine tunnel.

[0016] Figure 2 This utility model proposes a ventilation device for mine tunnels. Figure 1 A cross-sectional structural diagram.

[0017] Figure 3 This utility model proposes a ventilation device for mine tunnels. Figure 2A cross-sectional structural diagram.

[0018] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0019] Figure 5 for Figure 2 Enlarged view of point B in the middle.

[0020] Legend: 1. Exhaust duct; 2. Inlet duct; 3. Connecting shaft; 4. Draft shield; 5. Exhaust fan; 6. Connector; 7. Insert; 8. Bearing seat; 9. Rotating shaft; 10. Transmission bevel gear; 11. Input bevel gear; 12. Drive helical gear one; 13. Drive helical gear two; 14. Rectangular bar; 15. Inlet fan; 16. Screw. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] like Figure 1-5As shown, a ventilation device for a mine tunnel includes several exhaust pipes 1 and air inlet pipes 2. The exhaust pipes 1 and air inlet pipes 2 are arranged sequentially end-to-end. The appropriate number of exhaust pipes 1 and air inlet pipes 2 are selected and assembled according to the actual length of the tunnel. The opposite ends of two adjacent exhaust pipes 1 or two adjacent air inlet pipes 2 can be fixed with bolts. An exhaust fan 5 is installed at the center of the surface of each exhaust pipe 1, and an air inlet fan 15 is installed at the center of the surface of each air inlet pipe 2. Each side of each air inlet pipe 2 is equipped with an exhaust pipe 1. The exhaust fan 5 in the exhaust duct 1 quickly draws harmful gases from a certain area into the exhaust duct 1. Meanwhile, one end of the assembled air inlet duct 2 is located outside the tunnel to allow fresh air to enter. Under the action of the air inlet fan 15, the fresh air in the air inlet duct 2 is delivered into the corresponding area inside the tunnel, achieving rapid ventilation. The air inlet duct 2 and exhaust duct 1 are arranged parallel to each other, and a connecting shaft 3 is installed between them at the air inlet fan 15. Both ends of the connecting shaft 3 are rotatably connected to the surfaces of the air inlet duct 2 and exhaust duct 1 respectively, and both ends are fixedly connected. There is a transmission bevel gear 10. One end of the blade shaft of both the intake fan 15 and the exhaust fan 5 is fixedly connected to an input bevel gear 11 that meshes with the adjacent transmission bevel gear 10. When the intake fan 15 or the exhaust fan 5 is running, the input bevel gear 11 on its blade shaft rotates synchronously and at the same speed, and the meshing transmission bevel gear 10 rotates. Under the connecting action of the connecting shaft 3, the transmission bevel gear 10 at the exhaust fan 5 or the intake fan 15 rotates, and finally, under the meshing connection, the exhaust fan 5 or the intake fan 15 rotates and runs. Even to reduce power consumption, a guide shroud 4 is fixedly connected inside the exhaust duct 1 at the air outlet of the exhaust fan 5. The air flow direction inside the guide shroud 4 is set parallel to the air flow direction inside the exhaust duct 1. This ensures that the harmful gases drawn into the exhaust duct 1 by the exhaust fan 5 flow along the gas flow direction inside the exhaust duct 1 and are eventually discharged outside the tunnel. The side of the guide shroud 4 can prevent harmful gases from the upwind direction from passing through the air outlet of the exhaust fan 5 in the downwind direction, preventing airflow turbulence or affecting the air pressure at the air outlet of the exhaust fan 5 in the downwind direction.

[0024] Additionally: A drive helical gear 12 is fixedly connected through the end face of the input bevel gear 11. A drive helical gear 13, meshing with the drive helical gear 12, is rotatably connected inside both the exhaust pipe 1 and the inlet pipe 2. A rotating shaft 9, arranged along the length of the exhaust pipe 1, is fixedly connected through the end face of the drive helical gear 13. Rectangular bars 14 are fixedly connected to both ends of the rotating shaft 9, and a sleeve 7 is fitted onto the surface of the rectangular bars 14 via a spring rod. The end face of the spring rod cylinder is fixed to the end face of the rectangular bars 14, and the telescopic end is fixed to the inner end face of the sleeve 7. The cylinder 7 is fitted onto the rectangular bar 14. Utilizing the elasticity of the spring rod, the two connectors 6 are kept in close contact when two adjacent exhaust pipes 1 or air inlet pipes 2 are combined. The rotation of the input bevel gear 11 will drive the drive helical gear 12 on its end face to rotate, thereby achieving the meshing connection of the drive helical gear 13, which will drive the rotating shaft 9 to rotate. The rotation of the rotating shaft 9 will drive the rectangular bar 14 on its end face to rotate. Because the rectangular bar 14 is inserted into the cylinder 7, the special properties of the outer wall of the rectangular bar 14 will enable the rectangular bar 14 to drive the cylinder 7 to rotate.

[0025] Additionally: Bearing seats 8 are fixedly connected to the inner walls of the air inlet pipe 2 and the exhaust pipe 1 at both ends of the rotating shaft 9 and the end of the insert 7. The rotating shaft 9 is fixed to the inner ring of the bearing seat 8, and the insert 7 is connected through the inner ring of the bearing seat 8. When the rotating shaft 9 rotates, it drives the inner ring of the bearing seat 8 connected to it to rotate relative to the outer ring. Because the rotating shaft 9 is fixed to the inner ring of the bearing seat 8, and the bearing seat 8 is fixed inside the pipe, the position of the rotating shaft 9 and the driving helical gear 13 on its surface can be kept stable. The insert 7 is connected through the matching inner ring of the bearing seat 8, so the insert 7 can slide relative to the inner ring of the bearing seat 8. Simultaneously, when the insert 7 rotates, it also drives the inner ring of the bearing seat 8 to rotate relative to the outer ring. The inner and outer walls of the insert 7 are rectangular, and a connector 6 is fixedly connected to the end of the insert 7 away from the driving helical gear 13. When the insert 7 rotates, the connector 6 on its end face rotates synchronously. Of the two connectors 6 in the same pipe, one connector 6 is fixedly connected to a connector for insertion into the other connector 6. Two screws 16 are used to connect two exhaust pipes 1 or two air inlets 2 end to end. The connector 6 on the other side of the exhaust pipe 1 or air inlet 2 in the upwind direction is inserted into the screw 16 in the connector 6 on the other side of the exhaust pipe 1 or air inlet 2 in the downwind direction. This allows the assembled two adjacent exhaust pipes 1 or air inlet 2 to be used in practice. The upwind air inlet fan 5 or exhaust fan 15 can drive the downwind air inlet fan 5 or exhaust fan 15 to operate. Combined with the connecting shaft 3, in actual use, only one exhaust fan 5 or air inlet fan 15 needs to be powered on among the assembled exhaust pipes 1 and air inlet 2 to enable the exhaust fans 5 or air inlet fans 15 in other positions to operate simultaneously. The insert 7 inside the exhaust pipe 1 is also slidably connected to the side of the guide shroud 4 through the bearing seat 8. The bearing seat 8 set here can be a commonly available sealed bearing. Referring to the function of the bearing seat 8 inside the exhaust pipe 1 for the insert 7, the bearing seat 8 here can also ensure that the insert 7 can rotate smoothly and slide smoothly.

[0026] Working principle: The connecting shaft 3 fixes the relative positions of the air inlet pipe 2 and the exhaust pipe 1 used in conjunction. During installation, a certain number of air inlet pipes 2 and exhaust pipes 1 are selected according to the length of the tunnel, and the connecting shaft 3 is used for initial classification. Exhaust pipes 1 are connected end to end, and air inlet pipes 2 are connected end to end, with bolts used for auxiliary connection. In the spliced ​​two adjacent exhaust pipes 1 or air inlet pipes 2, the connector 6 on the other side of the exhaust pipe 1 or air inlet pipe 2 in the upwind direction is inserted into the screw 16 in the connector 6 on one side of the exhaust pipe 1 or air inlet pipe 2 in the downwind direction. Therefore, in actual use, only a few exhaust fans 5 at specific locations need to be energized to realize the rotation of the input bevel gear 11 of the energized exhaust fan 5 blade shaft, realizing the rotation of the meshing transmission bevel gear 10. Under the connection of the connecting shaft 3, air intake is achieved. The transmission bevel gear 10 in pipe 2 rotates, and ultimately, under the action of meshing connection, the intake fan 15 in the working air intake pipe 2 rotates. Meanwhile, the exhaust fans 5 in other nearby positions drive the drive helical gear 12 on its end face to rotate through the input bevel gear 11, thereby achieving the meshing connection of the drive helical gear 13, which drives the rotating shaft 9 to rotate. The rotation of the rotating shaft 9 will drive the rectangular bar 14 on its end face to rotate, and the rectangular bar 14 will drive the insert 7 to rotate. Under the action of the screw 16 passing through the two connecting heads 6, the connecting head 6 in the adjacent exhaust pipe 1 drives the insert 7 to rotate, thereby realizing the rotation of the exhaust fan 5 in the adjacent exhaust pipe 1. By analogy, the exhaust fans 5 at a greater distance can rotate. Similarly, the intake fans 15 at a greater distance in the air intake pipe 2 also operate under the action of the passively rotating intake fans 15, thus realizing ventilation in the tunnel.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A ventilation device for mine tunnels, characterized in that: It includes several exhaust pipes (1) and air inlet pipes (2), which are arranged in a continuous sequence. An exhaust fan (5) is provided at the middle of the surface of the exhaust pipe (1), and an air inlet fan (15) is provided at the middle of the surface of the air inlet pipe (2). Each air inlet pipe (2) is connected to an exhaust pipe (1) on one side. The air inlet pipe (2) and exhaust pipe (1) are arranged in parallel, and a connecting shaft (3) is provided between them at the air inlet fan (15). The two ends of the shaft (3) are respectively rotatably connected to the surfaces of the air inlet pipe (2) and the exhaust pipe (1), and both ends are fixedly connected to the transmission bevel gear (10). The fan blade shafts of the air inlet fan (15) and the exhaust fan (5) are fixedly connected to the input bevel gear (11) that meshes with the adjacent transmission bevel gear (10). The exhaust pipe (1) is fixedly connected to the air outlet of the exhaust fan (5). The air flow direction inside the air guide (4) is parallel to the air flow direction inside the exhaust pipe (1).

2. The mine tunnel ventilation device according to claim 1, characterized in that: The input bevel gear (11) is fixedly connected to the end face of the drive helical gear one (12), and the exhaust pipe (1) and the air inlet pipe (2) are rotatably connected to the drive helical gear two (13) that meshes with the drive helical gear one (12).

3. The mine tunnel ventilation device according to claim 2, characterized in that: The drive helical gear 2 (13) has a rotating shaft (9) fixedly connected through the end face along the length of the exhaust pipe (1). Both ends of the rotating shaft (9) are fixedly connected with rectangular bars (14), and the surface of the rectangular bars (14) is fitted with inserts (7) through spring rods.

4. The mine tunnel ventilation device according to claim 3, characterized in that: The inner walls of the air inlet pipe (2) and the exhaust pipe (1) are fixedly connected to bearing seats (8) at both ends of the rotating shaft (9) and at the end of the insert (7). The rotating shaft (9) is fixed to the inner ring of the bearing seat (8), and the insert (7) is connected to the inner ring of the bearing seat (8).

5. The mine tunnel ventilation device according to claim 4, characterized in that: The inner and outer walls of the insert (7) are rectangular, and a connector (6) is fixedly connected to one end of the insert (7) away from the drive helical gear (13). Among the two connectors (6) in the same tube, one of the connectors (6) is fixedly connected with two screws (16) for insertion into the other connector (6).

6. The mine tunnel ventilation device according to claim 5, characterized in that: The insert (7) inside the exhaust pipe (1) and the side of the guide shroud (4) are also slidably connected through the bearing seat (8).

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