Coal mine gas automatic air distribution system

Abstract

The utility model discloses a kind of coal mine gas automatic air distribution system, it is related to air distribution system technical field, including the installation cylinder for carrying impeller, the inner wall of installation cylinder is provided with multiple air guide grooves located behind impeller, multiple air guide grooves extend along helix and helix direction direction is same.The utility model when carrying out exhaust work, impeller rotates and pushes the air movement inside mine, air when flowing through guide groove area, outside air is contacted with air guide groove extending along helix, air guide groove guides airflow rotation, so that the particulate in airflow is gathered to the periphery of airflow under the action of centrifugal force, gradually falls into air guide groove and flows along air guide groove, particulate when moving to lowest point, it falls into ash outlet under the action of gravity, particulate enters receiving box through ash outlet and separates from airflow, so that the particulate carried in airflow reduces, and then avoid particulate accumulation in pipeline and make the space of pipeline air flow reduced.

Description

Technical Field

[0001] This utility model relates to the field of ventilation system technology, specifically an automatic ventilation system for coal mine gas. Background Technology

[0002] As is well known, ventilation systems are essential devices in coal mines. They can remove harmful gases (such as methane) from the mine and bring fresh air into the mine, ensuring the health of the workers in the mine.

[0003] For example, the invention patent with publication number CN116558003B, publication date October 13, 2023, entitled "An Adjustable Mine Ventilator," includes a fan housing, a fan blade driven by a first motor inside the fan housing, a limit plate inside the fan housing, a guide rod and a drive screw axially arranged inside the fan housing, the drive screw being driven by a second motor, a pressing plate between the drive screw and the guide rod, a shuttle-shaped adjusting body sandwiched between the pressing plate and the limit plate, a spray head above the shuttle-shaped adjusting body, a water collection tank inside the fan housing below the shuttle-shaped adjusting body, a circulating water tank connected to the water collection tank, a water pump inside the circulating water tank, and a water pump outlet connected to the spray head via a pipe. A first humidity sensor and a second humidity sensor are respectively located on the air inlet and air outlet sides of the fan housing. This adjustable mine ventilation fan can quickly and automatically adjust the air humidity to a set humidity range.

[0004] The shortcoming of the existing technology is that the ventilation fan installed in the mine needs to transport the air in the mine upwards to ensure the safety of the working face and promote air exchange. However, the air in the mine contains a large amount of particulate matter, and the flow rate of the air transported upwards gradually decreases. The air's ability to carry particulate matter also gradually decreases. This causes the particulate matter to separate from the air and settle in the pipe, which in turn reduces the space for air flow in the pipe and reduces the air transport efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an automatic ventilation system for coal mine gas to address the aforementioned shortcomings in the existing technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic coal mine gas distribution system, comprising an installation cylinder for supporting an impeller, wherein a plurality of air guide grooves are provided on the inner wall of the installation cylinder and located behind the impeller, the plurality of air guide grooves extend along a spiral and the spiral direction is the same, a receiving box is provided at the bottom of the installation cylinder, and an ash discharge port communicating with the receiving box is opened at the lowest point of the air guide groove.

[0007] As a further description of the above technical solution: the air guide groove is provided with an oblique channel adjacent to the ash discharge port and connected to the receiving box.

[0008] As a further description of the above technical solution: the bottom of the mounting cylinder is provided with a notch that is compatible with the receiving box.

[0009] As a further description of the above technical solution: the interior of the mounting cylinder is slidably provided with an inclined sealing plate for closing the notch.

[0010] As a further description of the above technical solution: a spring is provided between the sealing plate and the mounting cylinder.

[0011] As a further description of the above technical solution: the side wall of the receiving box is provided with a groove that matches the bottom of the sealing plate.

[0012] As a further description of the above technical solution: a groove adapted to the bottom of the sealing plate is provided on the side wall opposite to the notch.

[0013] As a further description of the above technical solution: the sealing plate is provided with a lever extending to the outside of the mounting cylinder.

[0014] As a further description of the above technical solution: the tail ends of the multiple air guide channels are all located at the lowest point and are provided with ash discharge ports that communicate with the receiving box.

[0015] In the above technical solution, the automatic ventilation system for coal mine gas provided by this utility model has the following beneficial effects: When performing exhaust work, the impeller rotates and drives the air inside the mine to move. When the air flows through the guide groove area, the outer air comes into contact with the air guide groove extending along the spiral. The air guide groove guides the airflow to rotate, so that the particles in the airflow converge towards the periphery of the airflow under the action of centrifugal force and gradually fall into the air guide groove and flow along the air guide groove. When the particles move to the lowest point, they fall into the ash discharge port under the action of gravity. The particles enter the receiving box through the ash discharge port and are separated from the airflow, thereby reducing the particles carried in the airflow and thus avoiding the accumulation of particles in the pipe and reducing the space for airflow in the pipe. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the air guide groove provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the internal structure of the mounting cylinder provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the ash discharge port provided in an embodiment of the present utility model; Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0018] Explanation of reference numerals in the attached figures: 1. Mounting cylinder; 11. Air guide channel; 12. Receiver box; 13. Sealing plate; 14. Ash discharge port; 15. Angled channel; 16. Pulley; 17. Spring. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Please see Figure 1-5 This utility model provides a technical solution: an automatic coal mine gas distribution system, including an installation cylinder 1 for supporting an impeller. The inner wall of the installation cylinder 1 is provided with a plurality of air guide grooves 11 located behind the impeller. The plurality of air guide grooves 11 extend along a spiral and have the same spiral direction. A receiving box 12 is provided at the bottom of the installation cylinder 1. The lowest point of the air guide groove 11 is provided with an ash discharge port 14 communicating with the receiving box 12.

[0021] Specifically, during exhaust operation, the impeller rotates, causing the air inside the mine to move. When the air flows through the guide groove area, the outer air comes into contact with the air guide groove 11 extending along the spiral. The air guide groove 11 guides the airflow to rotate, causing the particles in the airflow to converge towards the periphery of the airflow under the action of centrifugal force, gradually falling into the air guide groove 11 and flowing along the air guide groove 11. When the particles reach the lowest point, they fall into the ash discharge port 14 under the action of gravity. The particles enter the receiving box 12 through the ash discharge port 14 and are separated from the airflow, thereby reducing the particles carried in the airflow and thus preventing the accumulation of particles in the pipeline, which would reduce the space for airflow in the pipeline.

[0022] In another embodiment of the present invention, the air guide groove 11 is provided with an oblique channel 15 that is adjacent to the ash discharge port 14 and communicates with the receiving box 12.

[0023] Specifically, the inclined channel 15 is located above the ash discharge port 14, and the airflow first flows through the ash discharge port 14 and then through the inclined channel 15.

[0024] Furthermore, as the airflow passes through the ash discharge port 14, some particles fall into the ash discharge port 14 under the action of gravity. The airflow continues to move, carrying the particles that have not entered the ash discharge port 14 to continue moving upward along the air guide groove 11. However, the airflow's ability to carry particles is limited. After moving to a certain height, the airflow's thrust on these particles is insufficient. These particles move obliquely downward along the air guide groove 11 and then enter the oblique channel 15, entering the receiving box 12 through the oblique channel 15. Moreover, the ash discharge port 14 and the oblique channel 15 are arranged adjacent to each other rather than connected together. This arrangement ensures that the missing part on the air guide groove 11 will not affect the airflow.

[0025] In another embodiment of the present invention, the bottom of the mounting cylinder 1 is provided with a notch adapted to the receiving box 12, and an inclined sealing plate 13 for closing the notch is slidably provided inside the mounting cylinder 1. A spring 17 is provided between the sealing plate 13 and the mounting cylinder 1. A groove adapted to the bottom of the sealing plate 13 is provided on the side wall of the receiving box 12. A groove adapted to the bottom of the sealing plate 13 is provided on the side wall opposite to the notch on the sealing plate 13. A lever 16 extending to the outside of the mounting cylinder 1 is provided on the sealing plate 13.

[0026] Specifically, the mounting cylinder 1 has a notch for the movement of the lever block 16.

[0027] Furthermore, when installing the receiving box 12, align the receiving box 12 with the notch at the bottom of the mounting cylinder 1 and insert the receiving box 12 into the mounting cylinder 1. The top of the receiving box 12 pushes against the inclined sealing plate 13, pushing the sealing plate 13 to move obliquely upward. The spring 17 between the sealing plate 13 and the mounting cylinder 1 is compressed, and the receiving box 12 continues to move. The sealing plate 13 is completely retracted into the mounting cylinder 1 until the receiving box 12 moves to its highest position. The sealing plate 13 is directly opposite the groove on the side wall of the receiving box 12. Under the action of the spring 17, the sealing plate 13 is inserted into the groove on the side wall of the receiving box 12, fixing the receiving box 12 in the mounting cylinder 1 so that it can receive the particles discharged from the mounting cylinder 1.

[0028] Furthermore, when it is necessary to clean the particles in the receiving box 12 after working for a period of time, manually move the lever 16. The lever 16 will cause the sealing plate 13 to separate from the receiving box 12. At this time, the receiving box 12 can be removed from the mounting cylinder 1. Then release the lever 16. The sealing plate 13 will move under the action of the spring 17 and gradually seal the notch at the bottom of the mounting cylinder 1 until the bottom end of the sealing plate 13 is inserted into the groove on the opposite side of the notch. The sealing plate 13 seals the mounting cylinder 1 to prevent air leakage inside the mounting cylinder 1 from affecting the air flow rate.

[0029] Furthermore, in the above embodiment, a rubber sealing ring is provided on the top of the receiving box 12, and the sealing ring fits into the mounting cylinder 1 to ensure a seal between the two.

[0030] In another embodiment of this utility model, the tail ends of the plurality of air guide grooves 11 are all located at the lowest point and are provided with ash discharge ports 14 that communicate with the receiving box 12.

[0031] Specifically, when the airflow passes through the air guide groove 11 area, the outer air comes into contact with the air guide groove 11 extending along the spiral. The air guide groove 11 guides the airflow to rotate, causing the particles in the airflow to converge towards the periphery of the airflow under the action of centrifugal force, gradually falling into the air guide groove 11 and flowing along the air guide groove 11. When the airflow moves to the tail end of the air guide groove 11, the particles gathered in the air guide groove 11 will also be pushed by the airflow to converge at the tail end of the air guide groove 11. These particles can directly enter the receiving box 12 through the ash discharge port 14 at the tail end of the air guide groove 11, further reducing the particles carried in the airflow.

[0032] In another embodiment of the present invention, the depth of the lowest point of the air guide groove 11 is greater than the depth of other parts, and the ash discharge port 14 is opened at the lowest point of the air guide groove 11.

[0033] Furthermore, during exhaust operations, the impeller rotates, pushing the air inside the mine to move. When the air flows through the guide groove area, the outer air comes into contact with the air guide groove 11 extending along the spiral. The air guide groove 11 guides the airflow to rotate, causing the particles in the airflow to converge towards the periphery of the airflow under the action of centrifugal force, gradually falling into the air guide groove 11 and flowing along the air guide groove 11. When the particles move to the lowest point, because the depth of the lowest point of the air guide groove 11 is greater than the depth of other parts, the particles need greater thrust to leave the lowest point of the air guide groove 11. The particles that do not receive enough thrust will fall into the receiving box 12 under the action of gravity, thereby reducing the particles in the airflow.

[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic ventilation system for coal mine gas distribution, characterized in that, The device includes a mounting cylinder (1) for supporting the impeller. The inner wall of the mounting cylinder (1) is provided with a plurality of air guide grooves (11) located behind the impeller. The plurality of air guide grooves (11) extend along a spiral and have the same spiral direction. A receiving box (12) is provided at the bottom of the mounting cylinder (1). A ash discharge port (14) communicating with the receiving box (12) is opened at the lowest point of the air guide groove (11).

2. The automatic ventilation system for coal mine gas according to claim 1, characterized in that, The air guide groove (11) is provided with an oblique channel (15) that is adjacent to the ash discharge port (14) and connected to the receiving box (12).

3. The automatic ventilation system for coal mine gas according to claim 1, characterized in that, The bottom of the mounting cylinder (1) has a notch that matches the receiving box (12).

4. The automatic ventilation system for coal mine gas according to claim 3, characterized in that, The mounting cylinder (1) is slidably provided with an inclined sealing plate (13) for closing the notch.

5. The automatic ventilation system for coal mine gas according to claim 4, characterized in that, A spring (17) is provided between the sealing plate (13) and the mounting cylinder (1).

6. The automatic ventilation system for coal mine gas according to claim 4, characterized in that, The receiving box (12) has a groove on its side wall that is adapted to the bottom of the sealing plate (13).

7. The automatic ventilation system for coal mine gas according to claim 4, characterized in that, The notch has a groove on the side wall opposite to the sealing plate (13) that is adapted to the bottom of the sealing plate (13).

8. The automatic ventilation system for coal mine gas according to claim 4, characterized in that, The sealing plate (13) is provided with a lever (16) extending to the outside of the mounting cylinder (1).

9. The automatic ventilation system for coal mine gas according to claim 1, characterized in that, The tail end of the air guide groove (11) is located at the lowest point and is provided with a ash discharge port (14) that communicates with the receiving box (12).

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