Mine ventilation system

Abstract

The utility model discloses a mine ventilation system which comprises an air inlet purification structure installed on the ground and an air outlet installed on the ground, a main vertical shaft is formed from the ground to the interior of a stratum, a mining working face located in the stratum is communicated with the main vertical shaft, and the mining working face is communicated with an air return way. The other end of the return airway extends to the ground and is communicated with the air outlet; a fan chamber is arranged in the air return way, a main fan is installed in the fan chamber, the main fan sucks air in the mining working face into the air return way and exhausts the air through the air outlet, and the air outlet of the air inlet purification structure is communicated with the main vertical shaft. By arranging the main fan, air circulation can be formed in a mine, outside air can be sucked into the underground, air in the mine can be exhausted, an air inlet purification structure is matched, air fed into the underground can be purified, the underground air quality is guaranteed, and the main fan is matched with a local fan, so that air can be blown to mining work and the surface, and dust and harmful gas are prevented from being diffused outwards.

Description

Technical Field

[0001] The utility model relates to the technical field of mine equipment, in particular to a mine ventilation system. Background Art

[0002] A mine is a collection of tunnels, chambers, and other structures within the earth's strata. Underground mining operations generate dust and toxic gases. Because the working surface is located within the strata, air convection is very weak, making it difficult for fresh air to enter the working area. To provide sufficient fresh air underground and remove harmful gases and dust, a ventilation system is required. Existing ventilation systems directly draw air from the outside into the mine. When the surface environment is poor, the quality of the incoming air cannot be guaranteed, and they fail to effectively improve underground air quality. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to provide a mine ventilation system that can effectively improve the air quality underground.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a mine ventilation system, comprising an air intake purification structure installed on the ground and a first air outlet installed on the ground, a main shaft is opened from the ground to the stratum, a mining working face located in the stratum is connected to the main shaft, the mining working face is connected to the return air lane, the other end of the return air lane extends toward the ground and is connected to the first air outlet; a fan room is provided in the return air lane, a main fan is installed in the fan room, the main fan draws the air in the mining working face into the return air lane and discharges it through the first air outlet, the air outlet of the air intake purification structure is connected to the main shaft, the air intake purification structure inputs outside air into the main shaft and into the mining working face; a local fan is installed in the mining working face, and the local fan is arranged toward the working face.

[0005] The above-mentioned mine ventilation system, the air intake purification structure includes an air intake chamber, a spray pipe and a nozzle, the air intake chamber is installed on the ground, the spray pipe is installed on the inner top wall of the air intake chamber, the spray pipe is connected to a high-pressure water source, and more than two nozzles are installed on the spray pipe. The high-pressure water source supplies water to the spray pipe and sprays it out through the nozzle; a second air outlet is provided on the bottom of the air intake chamber, and the second air outlet is connected to the main shaft fluid through a pipeline, and an air inlet is provided on one side of the air intake chamber.

[0006] In the above-mentioned mine ventilation system, an air intake fan is installed in the air inlet on the side wall of the air intake chamber, and the second air outlet is opened on the bottom wall of the air intake chamber away from the air inlet. A guide plate is installed on the inner bottom wall of the air intake chamber, and the height of the guide plate gradually increases from the side close to the air intake fan to the side away from the air intake fan. The guide plate is located directly below the nozzle; there is a gap between the bottom of the air intake fan and the inner bottom wall of the air intake chamber.

[0007] The above-mentioned mine ventilation system, the main fan includes an air guide tube, fan blades, a support platform and a main motor, the air guide tube is fixedly installed in the fan room, and the axis of the air guide tube is parallel to the ventilation direction, the fan blades are rotatably connected in the air guide tube, a support platform is provided on one end of the air guide tube, and the main motor is detachably installed on the support platform by bolts, the main motor is coaxially arranged with the fan blades, and the output shaft of the main motor and the input shaft of the fan blades are connected by a coupling.

[0008] The above-mentioned mine ventilation system is also equipped with a lifting structure and a spare motor in the fan room. The spare motor is placed on a support plate. The four corners of the support plate are threaded with support bolts, and the ends of the support bolts are supported on the ground in the fan room.

[0009] The above-mentioned mine ventilation system, the lifting structure includes a support column, a rotating table and a boom, the rotating table is fixedly installed on the ground in the fan room, one end of the support column is connected to the rotating table, the other end of the support column is vertically fixedly connected to the middle position of the boom, the two ends of the boom are respectively installed with a first guide wheel and a second guide wheel, the middle of the boom is rotatably installed with a transmission wheel, a steel rope is wound on the transmission wheel, one end of the steel rope is fixedly connected to the lifting ring on the main motor after passing around the first guide wheel, and the other end of the steel rope is fixedly connected to the lifting ring on the standby motor after passing around the second guide wheel.

[0010] In the above-mentioned mine ventilation system, teeth are provided on the outer ring of the transmission wheel, a driving gear is rotatably connected to the support column, the driving gear is engaged with the teeth on the outer ring of the transmission wheel, and a handle is installed on the driving gear.

[0011] In the above-mentioned mine ventilation system, the steel rope is wound around the transmission wheel at least once, a roller is provided between two adjacent circles of the steel rope, a support rod is fixedly connected to the support column, and the roller is rotatably mounted on the support rod.

[0012] In the above-mentioned mine ventilation system, wind speed sensors are installed in the mining working face and the return air lane, and the wind speed sensors are connected to the controller in the ground control room.

[0013] The technical solution of the utility model has achieved the following beneficial technical effects:

[0014] 1. By setting up the main fan, air circulation can be formed in the mine, the outside air can be drawn into the well, and the air in the well can be discharged. In combination with the air intake purification structure, the air sent into the well can be purified to ensure the quality of the air underground. In combination with the local fan, it can blow air on the surface in the opposite direction of the mining work to suppress the spread of dust and harmful gases outward.

[0015] 2. By setting up a main fan that can replace the main motor and setting up a spare motor, when the main motor fails, it can be quickly replaced to achieve rapid troubleshooting and ensure the underground air quality; by setting up a lifting structure, the efficiency of motor replacement can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Installation diagram of the utility model mine ventilation system;

[0017] Figure 2 A schematic cross-sectional view of the air inlet purification structure of the utility model;

[0018] Figure 3 Schematic diagram of the main fan and the lifting structure of the utility model installed in the fan room;

[0019] Figure 4 A schematic diagram of the lifting structure of the utility model;

[0020] Figure 5 A schematic diagram of the utility model showing a steel rope wound on a transmission wheel.

[0021] The reference numerals in the figure are as follows: 1-stratum; 2-main shaft; 3-mining working face; 4-return air lane; 5-fan room; 6-main fan; 601-air guide tube; 602-fan blade; 603-support platform; 604-main motor; 605-coupling; 7-local fan; 8-hoisting structure; 801-support column; 802-rotating platform; 803-jib; 804-first guide wheel; 805-second guide wheel Wheel; 806-transmission wheel; 807-drive gear; 808-handle; 809-support rod; 810-roller; 811-steel rope; 9-air inlet purification structure; 901-air inlet chamber; 902-spray pipe; 903-spray head; 904-air inlet fan; 905-second air outlet; 906-guide plate; 10-first air outlet; 11-spare motor; 12-support plate; 13-support bolt. DETAILED DESCRIPTION

[0022] A mine ventilation system in this embodiment, such as Figure 1As shown, it includes an air intake purification structure 9 installed on the ground and a first air outlet 10 installed on the ground. The main shaft 2 is opened from the ground to the stratum 1. The mining working face 3 located in the stratum 1 is connected with the main shaft 2, and the mining working face 3 is connected with the return air lane 4. The other end of the return air lane 4 extends to the ground and is connected with the first air outlet 10; a fan room 5 is provided in the return air lane 4, and a main fan 6 is installed in the fan room 5. The main fan 6 draws the air in the mining working face 3 into the return air lane 4 and discharges it through the first air outlet 10. The air outlet of the air intake purification structure 9 is connected with the main shaft 2, and the air intake purification structure 9 inputs the outside air into the main shaft 2 and into the mining working face 3; a local fan 7 is installed in the mining working face 3, and the local fan 7 is set towards the working face. Wind speed sensors are installed in the mining working face 3 and the return air lane 4, and the wind speed sensors are connected to the controller in the ground control room.

[0023] like Figure 2 As shown, the air inlet purification structure 9 includes an air inlet chamber 901, a spray pipe 902 and a nozzle 903. The air inlet chamber 901 is installed on the ground, and the spray pipe 902 is installed on the inner top wall of the air inlet chamber 901. The spray pipe 902 is connected to a high-pressure water source. Two or more nozzles 903 are installed on the spray pipe 902. The high-pressure water source supplies water to the spray pipe 902 and sprays it through the nozzle 903; a second air outlet 905 is opened on the bottom of the air inlet chamber 901, and the second air outlet 905 is fluidically connected to the main shaft 2 through a pipeline. The air inlet chamber 9 01 is provided with an air inlet on one side; an air inlet fan 904 is installed in the air inlet on the side wall of the air inlet chamber 901, and a second air outlet 905 is provided on the bottom wall of the air inlet chamber 901 on the side away from the air inlet, and a guide plate 906 is installed on the inner bottom wall of the air inlet chamber 901, and the height of the guide plate 906 gradually increases from the side close to the air inlet fan 904 to the side away from the air inlet fan 904, and the guide plate 906 is located directly below the nozzle 903; there is a gap between the bottom of the air inlet fan 904 and the inner bottom wall of the air inlet chamber 901.

[0024] like Figure 3 As shown, the main fan 6 includes an air guide tube 601, fan blades 602, a support platform 603 and a main motor 604. The air guide tube 601 is fixedly installed in the fan chamber 5, and the axis of the air guide tube 601 is parallel to the ventilation direction. The fan blades 602 are rotatably connected in the air guide tube 601. A support platform 603 is provided on one end of the air guide tube 601. The main motor 604 is detachably installed on the support platform 603 by bolts. The main motor 604 is coaxially arranged with the fan blades 602, and the output shaft of the main motor 604 and the input shaft of the fan blades 602 are transmission-connected by a coupling 605; a lifting structure 8 and a spare motor 11 are also installed in the fan chamber 5, and the spare motor 11 is placed on a support plate 12. The four corners of the support plate 12 are threaded with support bolts 13, and the ends of the support bolts 13 are supported on the ground in the fan chamber 5.

[0025] like Figure 3-4 As shown, the lifting structure 8 includes a support column 801, a rotating platform 802 and a boom 803. The rotating platform 802 is fixedly installed on the ground in the fan room 5. One end of the support column 801 is connected to the rotating platform 802, and the other end of the support column 801 is vertically fixedly connected to the middle position of the boom 803. The lengths of the two ends of the boom 803 are the same. The two ends of the boom 803 are respectively installed with a first guide wheel 804 and a second guide wheel 805. The middle of the boom 803 is rotatably installed with a transmission wheel 806. A steel rope 811 is wound around the driving wheel 806. One end of the steel rope 811 is fixedly connected to the eye on the main motor 604 after passing through the first guide wheel 804. The other end of the steel rope 811 is fixedly connected to the eye on the standby motor 11 after passing through the second guide wheel 805. The outer ring of the transmission wheel 806 is provided with teeth. The support column 801 is rotatably connected to the driving gear 807. The driving gear 807 is meshed with the teeth on the outer ring of the transmission wheel 806. A handle 808 is installed on the driving gear 807. Figure 5 As shown, the steel rope 811 is wound around the transmission wheel 806 at least once, and a roller 810 is provided between two adjacent circles of the steel rope 811 . A support rod 809 is fixedly connected to the support column 801 , and the roller 810 is rotatably mounted on the support rod 809 .

[0026] Working principle: During normal operation, the main fan 6 and the local fan 7 are in operation. Under the action of the main fan 6, the air in the mining working face 3 is drawn into the return air channel 4 and discharged through the first air outlet 10. The fresh air from the outside enters the mining working face 3 through the main shaft 2, realizing the circulation of underground air; the local fan 7 is set towards the mining face to suppress the diffusion of dust and harmful gases and assist ventilation.

[0027] When the external environment is harsh, the air intake purification structure 9 is activated, and the high-pressure water source is connected to the spray pipe 902. The high-pressure water is sprayed out through the nozzle 903, forming a water curtain in the air intake chamber 901. The air intake fan 904 sends the outside air into the air intake chamber 901. Under the action of the water curtain, the dust is adsorbed. A certain amount of agent can also be added to the spray water to adsorb harmful gases. The purified gas is transported to the main vertical shaft 2 through the second air outlet 905, and then enters the mining working face 3. The liquid after adsorbing the dust is discharged outside the air intake chamber 901 under the action of the guide plate 906.

[0028] When the main motor 604 needs to be replaced, first remove the coupling 605 and the bolts used to fix the main motor 604. At this time, the main motor 604 is in a separated state. Then, the two ends of the steel rope 811 are respectively connected to the main motor 604 and the spare motor 11, and the steel rope 811 is in a taut state. Then, use a tool to tighten the support bolt 13 to lower the height of the support plate 12. The main motor 604 and the spare motor 11 are motors of the same model and have equal weight. After the support plate 12 is completely lowered, the steel rope 811 is completely taut and suspends the main motor 604 and the spare motor 11. Since the weight of both ends of the steel rope 811 is equal and the two ends are in a balanced state, only a small force needs to be applied to realize the lifting and lowering of the main motor 604. Turn the handle 808 to drive the drive gear 807 to rotate the transmission wheel 806, and the steel rope 811 moves to one side. Transmission, so that the main motor 604 rises and separates from the support platform 603, and then pushes the boom 803 to make the support column 801 rotate along the rotating table 802, so that the position of the backup motor 11 and the main motor 604 are swapped. When the backup motor 11 rotates to a position close to the support platform 603, turn the handle 808 to raise the backup motor 11 and lower the main motor 604, and then continue to adjust the position of the backup motor 11 until the backup motor 11 is completely installed on the support platform 603, and then fix the backup motor 11 on the support platform 603 with bolts, and install the coupling 605. During the rising process of the backup motor 11, the main motor 604 drops synchronously. Compared with the traditional lifting replacement, it can reduce the operating steps and improve the replacement efficiency. At the same time, the same weight of the two motors is used for balancing, which is conducive to improving safety.

[0029] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the claims of this patent application.

Claims

1. A mine ventilation system, characterized in that: The invention comprises an air inlet purification structure (9) installed on the ground and a first air outlet (10) installed on the ground, a main shaft (2) is opened from the ground into the stratum (1), a mining working face (3) located in the stratum (1) is connected to the main shaft (2), the mining working face (3) is connected to the return air lane (4), the other end of the return air lane (4) extends toward the ground and is connected to the first air outlet (10); a fan room (5) is provided in the return air lane (4), and the fan room (5) ) is installed with a main fan (6), the main fan (6) draws the air in the mining working face (3) into the return air channel (4) and discharges it through the first air outlet (10), the air outlet of the air inlet purification structure (9) is connected with the main shaft (2), the air inlet purification structure (9) inputs the outside air into the main shaft (2) and into the mining working face (3); a local fan (7) is installed in the mining working face (3), and the local fan (7) is arranged toward the working face.

2. A mine ventilation system according to claim 1, characterized in that: The air intake purification structure (9) comprises an air intake chamber (901), a spray pipe (902) and a nozzle (903); the air intake chamber (901) is installed on the ground; the spray pipe (902) is installed on the inner top wall of the air intake chamber (901); the spray pipe (902) is connected to a high-pressure water source; two or more nozzles (903) are installed on the spray pipe (902); the high-pressure water source supplies water into the spray pipe (902) and sprays water through the nozzle (903); a second air outlet (905) is provided on the bottom of the air intake chamber (901); the second air outlet (905) is fluidically connected to the main shaft (2) through a pipeline; an air intake is provided on one side of the air intake chamber (901).

3. A mine ventilation system according to claim 2, characterized in that: An air inlet fan (904) is installed in the air inlet on the side wall of the air inlet chamber (901), and the second air outlet (905) is opened on the bottom wall of the air inlet chamber (901) away from the air inlet. A guide plate (906) is installed on the inner bottom wall of the air inlet chamber (901), and the height of the guide plate (906) gradually increases from the side close to the air inlet fan (904) to the side away from the air inlet fan (904). The guide plate (906) is located directly below the nozzle (903); there is a gap between the bottom of the air inlet fan (904) and the inner bottom wall of the air inlet chamber (901).

4. A mine ventilation system according to claim 1, characterized in that: The main fan (6) comprises an air guide tube (601), fan blades (602), a support platform (603) and a main motor (604); the air guide tube (601) is fixedly installed in the fan chamber (5), and the axis of the air guide tube (601) is parallel to the ventilation direction; the fan blades (602) are rotatably connected in the air guide tube (601); a support platform (603) is provided on one end of the air guide tube (601); a main motor (604) is detachably mounted on the support platform (603) by means of bolts; the main motor (604) and the fan blades (602) are coaxially arranged; the output shaft of the main motor (604) and the input shaft of the fan blades (602) are transmission-connected via a coupling (605).

5. A mine ventilation system according to claim 4, characterized in that: A lifting structure (8) and a spare motor (11) are also installed in the fan room (5). The spare motor (11) is placed on a support plate (12). Support bolts (13) are threadedly connected to the four corners of the support plate (12). The ends of the support bolts (13) are supported on the ground in the fan room (5).

6. A mine ventilation system according to claim 5, characterized in that: The lifting structure (8) includes a support column (801), a rotating platform (802) and a boom (803), wherein the rotating platform (802) is fixedly installed on the ground in the fan room (5), one end of the support column (801) is connected to the rotating platform (802), and the other end of the support column (801) is vertically fixedly connected to the middle position of the boom (803), and the two ends of the boom (803) are respectively installed with a first guide wheel (804) and a second guide wheel (805), and the middle of the boom (803) is rotatably installed with a transmission wheel (806), and a steel rope (811) is wound around the transmission wheel (806), and one end of the steel rope (811) is fixedly connected to the lifting ring on the main motor (604) after passing through the first guide wheel (804), and the other end of the steel rope (811) is fixedly connected to the lifting ring on the standby motor (11) after passing through the second guide wheel (805).

7. A mine ventilation system according to claim 6, characterized in that: The outer ring of the transmission wheel (806) is provided with teeth, and the support column (801) is rotatably connected to a driving gear (807), the driving gear (807) is engaged with the teeth on the outer ring of the transmission wheel (806), and a handle (808) is installed on the driving gear (807).

8. A mine ventilation system according to claim 7, characterized in that: The steel rope (811) is wound around the transmission wheel (806) for at least one circle, and a roller (810) is provided between two adjacent circles of the steel rope (811). A support rod (809) is fixedly connected to the support column (801), and the roller (810) is rotatably mounted on the support rod (809).

9. A mine ventilation system according to claim 1, characterized in that: Wind speed sensors are installed in the mining working face (3) and the return air tunnel (4), and the wind speed sensors are connected to a controller in a ground control room.

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