Coal face air return corner gas emission promoting device

Abstract

The utility model discloses a coal face air return corner gas discharge promoting device which comprises an air draft vertical pipe, a moving mechanism, an air guide pipe and a fan. The air draft vertical pipe is of a cylindrical structure with the upper end and the lower end closed, a plurality of air inlet holes are formed in the side wall of the air draft vertical pipe, the hole diameter of each air inlet hole is 0.5-1 cm, the air draft vertical pipe is vertically arranged at the air return corner, a moving mechanism is arranged at the bottom of the air draft vertical pipe, an air outlet hole is formed in the top of the side wall of the air draft vertical pipe, and an air inlet of the air guide pipe is connected to the air outlet hole. And an air outlet of the air guide pipe is connected to an air inlet of the fan. The draught fan pumps out gas at the air return corner through the air draft vertical pipe and the air guide pipe, the hole diameter of the air inlet hole is 0.5-1 cm, so that all gas distributed at the air return corner from top to bottom can be pumped out, when the fully mechanized coal mining face is propelled, the air draft vertical pipe is moved through the moving mechanism, and the air draft vertical pipe is moved through the moving mechanism; the problems that in the prior art, an air return corner gas emission promoting device is complex in structure and inconvenient to move are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of gas exhaust promotion, and specifically relates to a gas exhaust promotion device for the return air corner of a coal mining face. Background Art

[0002] In coal mining operations, the return air corner located on the return air side of the coal mining face, that is, the triangular area formed by the upper wall of the return air tunnel and the edge of the goaf, is prone to accumulation of gas released from the intersection of the goaf and the mining face due to poor ventilation conditions, and the temperature and humidity are relatively high, resulting in a significant increase in gas concentration, making it a key area for gas prevention and control. At present, gas prevention and control in fully mechanized mining faces mainly relies on gas promotion and drainage devices to achieve effective gas extraction. However, after the existing gas promotion and drainage devices are fixed in position, it is not easy to adjust their position as the fully mechanized mining face advances. In addition, the structure of these devices is relatively complex, and they occupy more tunnel space, which makes it difficult for them to meet the actual use needs of the current fully mechanized mining face. Utility Model Content

[0003] The embodiment of the present application solves the problems of complex structure and inconvenience in movement of return air corner gas discharge devices in the prior art by providing a return air corner gas discharge device for a coal mining face.

[0004] In order to achieve the above-mentioned purpose, the embodiment of the present invention provides a coal mining face return air corner gas exhaust device, comprising an exhaust riser, a moving mechanism, an air guide pipe and a fan;

[0005] The exhaust riser is a cylindrical structure with closed upper and lower ends. The side wall of the exhaust riser is provided with multiple air inlet holes, the aperture of the air inlet holes is 0.5 to 1 cm, the exhaust riser is vertically arranged at the return air corner, the bottom of the exhaust riser is provided with the moving mechanism, the top of the side wall of the exhaust riser is provided with air outlet holes, the air inlet of the air guide duct is connected to the air outlet holes, and the air outlet of the air guide duct is connected to the air inlet of the fan.

[0006] In a possible implementation, the cross-section of the ventilation riser is a triangular structure.

[0007] In one possible implementation, the moving mechanism includes a telescopic column and a moving wheel. There are multiple telescopic columns, and the multiple telescopic columns are evenly distributed around the circumference of the exhaust riser. The upper end of the telescopic column is connected to the bottom of the exhaust riser, and the moving wheel is provided at the lower end of the telescopic column.

[0008] In one possible implementation, the telescopic column includes a sleeve, an adjustment column, a latch and a locking spring;

[0009] The sleeve is sleeved on the adjusting column, and a locking hole is provided on the side wall of the sleeve. The pin is horizontally and slidably installed in the mounting hole on the side wall of the adjusting column. The pin passes through the locking hole, and the locking spring is provided between the pin and the bottom of the mounting hole.

[0010] In a possible implementation, a tightening block is provided on the top of the exhaust riser, and a sharp end is provided on the upper end of the tightening block, and the sharp end abuts against the tunnel roof.

[0011] In a possible implementation, a tightening spring is provided between the tightening block and the top of the exhaust riser.

[0012] In a possible implementation, the fan is installed on a safety coal pillar.

[0013] In a possible implementation, the air guide tube is a flexible telescopic tube.

[0014] In a possible implementation, a filter is provided at the air outlet at the top of the exhaust riser.

[0015] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0016] The embodiment of the present invention provides a gas exhaust promotion device for the return air corner of a coal mining working face. When the device is used, the exhaust riser is fixed at the return air corner, the air duct is connected, and the fan is fixedly installed. Then the fan is started, and the fan extracts the gas at the return air corner through the exhaust riser and the air duct. The aperture of the air inlet is 0.5 to 1 cm, so all the gas distributed from top to bottom at the return air corner can be exhausted. The air inlet of the present invention adopts a small-aperture hole, so each air inlet can generate a negative pressure to exhaust the gas, avoiding the problem of uneven exhaust position when using a large-aperture exhaust riser or directly using an air duct to exhaust the gas. When the comprehensive mining working face is advanced, the exhaust riser is moved by the moving mechanism, so that the device is in the best working position. Therefore, the device of the present invention can well exhaust the gas at the return air corner, and the device has a simple structure and is easy to promote and use. The device can meet the use requirements of the current comprehensive mining working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some of the embodiments described in this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0018] Figure 1This is a schematic structural diagram of a return air corner gas exhaust device for a coal mining face provided by an embodiment of the utility model.

[0019] Figure 2 A plan view of a return air corner gas exhaust device for a coal mining face provided by an embodiment of the utility model.

[0020] Figure 3 This is a schematic structural diagram of a telescopic column provided in an embodiment of the utility model.

[0021] Figure numerals: 1-exhaust riser; 2-air inlet; 3-return air corner; 4-air guide duct; 5-fan; 6-telescopic column; 61-sleeve; 62-adjusting column; 63-latch; 64-locking spring; 65-locking hole; 7-moving wheel; 8-tensioning block; 9-tensioning spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention. The terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected" and "connected" 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, or it can be a communication between the internal parts of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0024] like Figures 1 to 3 As shown, the return air corner gas exhaust device for a coal mining face provided by an embodiment of the utility model includes an exhaust riser 1, a moving mechanism, an air guide duct 4 and a fan 5.

[0025] The exhaust riser 1 is a cylindrical structure with closed ends. The side wall of the exhaust riser 1 is provided with multiple air inlet holes 2, the aperture of the air inlet holes 2 is 0.5 to 1 cm, the exhaust riser 1 is vertically arranged at the return air corner 3, the bottom of the exhaust riser 1 is provided with a moving mechanism, the top of the side wall of the exhaust riser 1 is provided with air outlet holes, the air inlet of the air guide duct 4 is connected to the air outlet holes, and the air outlet of the air guide duct 4 is connected to the air inlet of the fan 5.

[0026] It should be noted that when the device is used, the exhaust riser 1 is fixed to the return air corner 3, the air duct 4 is connected, and the fan 5 is fixed and installed, and then the fan 5 is started. The fan 5 extracts the gas at the return air corner 3 through the exhaust riser 1 and the air duct 4. The aperture of the air inlet 2 is 0.5~1cm, so all the gas distributed from top to bottom at the return air corner 3 can be extracted. The air inlet 2 of the utility model adopts a small-aperture hole, so each air inlet 2 can generate negative pressure to extract the gas, avoiding the problem of uneven extraction position when using a large-aperture exhaust riser 1 or directly using the air duct 4 to extract the gas. When the comprehensive mining working face is advanced, the exhaust riser 1 is moved by the moving mechanism, so that the device is in the best working position. Therefore, the device of the utility model can well extract the gas at the return air corner 3, and the device has a simple structure and is easy to promote and use. The device can meet the current use requirements of the comprehensive mining working face.

[0027] In this embodiment, the cross section of the exhaust riser 1 is a triangular structure.

[0028] It should be noted that the cross-section of the exhaust riser 1 is adapted to the plane structure at the return air corner 3, and the projected area of ​​the exhaust riser 1 is 15% to 30% of the projected area of ​​the return air corner 3, thereby achieving a better gas extraction effect, reducing the area of ​​the tunnel occupied by the device, and reducing the impact of the device on the equipment or comprehensive mining in the tunnel.

[0029] In this embodiment, the moving mechanism includes a telescopic column 6 and a moving wheel 7. There are multiple telescopic columns 6, and the multiple telescopic columns 6 are evenly distributed around the circumference of the exhaust riser 1. The upper end of the telescopic column 6 is connected to the bottom of the exhaust riser 1, and the lower end of the telescopic column 6 is provided with a moving wheel 7.

[0030] It should be noted that when moving the exhaust riser 1, the telescopic column 6 is shortened and then moved by the moving wheel 7. When fixing the exhaust riser 1, the exhaust riser 1 is placed at the return air corner 3, the telescopic column 6 is extended so that the top of the exhaust riser 1 abuts the tunnel roof, the length of the telescopic column 6 is fixed, and the moving wheel 7 is locked.

[0031] In this embodiment, the telescopic column 6 includes a sleeve 61 , an adjustment column 62 , a latch 63 and a locking spring 64 .

[0032] The sleeve 61 is sleeved on the adjusting column 62. The side wall of the sleeve 61 is provided with a locking hole 65. The pin 63 is horizontally and slidably installed in the mounting hole of the side wall of the adjusting column 62. The pin 63 passes through the locking hole 65. The locking spring 64 is provided between the pin 63 and the bottom of the mounting hole.

[0033] It should be noted that there are multiple locking holes 65, which are arranged vertically on the side wall of the sleeve 61. When adjusting the length of the telescopic column 6, the pin 63 is retracted into the mounting hole. After adjustment, the pin 63 is extended and passed through the locking hole 65.

[0034] In this embodiment, a tightening block 8 is provided on the top of the exhaust riser 1. The upper end of the tightening block 8 is provided with a sharp end, which abuts against the tunnel roof.

[0035] It should be noted that, after the sharp end contacts the tunnel roof, it can fix the ventilation riser 1 .

[0036] In this embodiment, a tightening spring 9 is provided between the tightening block 8 and the top of the exhaust riser 1 .

[0037] It should be noted that after the sharp end abuts against the tunnel roof, the tightening spring 9 is compressed, thereby further fixing the exhaust riser 1 to prevent the exhaust riser 1 from tipping over.

[0038] In this embodiment, the fan 5 is installed on the safety coal pillar.

[0039] It should be noted that the fan 5 can be installed detachably.

[0040] In this embodiment, the air guide tube 4 is a flexible telescopic tube.

[0041] It should be noted that the flexible telescopic tube is generally made of a lightweight material and is therefore easy to install. Furthermore, the flexible telescopic tube is retractable and can facilitate adjustment of the airflow direction. Therefore, when the fully mechanized mining face is advanced, the position of the exhaust riser 1 can be easily adjusted, eliminating the need to adjust the fan 5 each time the exhaust riser 1 is adjusted.

[0042] In this embodiment, a filter is provided at the air outlet at the top of the exhaust riser 1 .

[0043] It should be noted that the filter screen filters the coal slag and the like in the air flow, and the coal slag and the like in the exhaust riser 1 fall to the bottom of the exhaust riser 1 .

[0044] In this embodiment, it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of equivalents of the claims be included in the present invention.

Claims

1. A gas exhaust promoting device for return air corners of a coal mining face, characterized by: It comprises an exhaust riser (1), a moving mechanism, an air guide pipe (4) and a fan (5); The exhaust riser (1) is a cylindrical structure with closed upper and lower ends. The side wall of the exhaust riser (1) is provided with a plurality of air inlet holes (2). The aperture of the air inlet holes (2) is 0.5 to 1 cm. The exhaust riser (1) is vertically arranged at the return air corner (3). The bottom of the exhaust riser (1) is provided with the moving mechanism. The top of the side wall of the exhaust riser (1) is provided with an air outlet hole. The air inlet of the air guide pipe (4) is connected to the air outlet hole, and the air outlet of the air guide pipe (4) is connected to the air inlet of the fan (5).

2. The coal mining face return air corner gas exhaust device according to claim 1, characterized in that: The cross section of the exhaust riser (1) is a triangular structure.

3. The coal mining face return air corner gas exhaust device according to claim 1, characterized in that: The moving mechanism comprises a telescopic column (6) and a moving wheel (7). The number of the telescopic columns (6) is multiple, and the multiple telescopic columns (6) are evenly distributed around the circumference of the exhaust riser (1). The upper end of the telescopic column (6) is connected to the bottom of the exhaust riser (1), and the moving wheel (7) is provided at the lower end of the telescopic column (6).

4. The coal mining face return air corner gas exhaust device according to claim 3, characterized in that: The telescopic column (6) comprises a sleeve (61), an adjustment column (62), a latch (63) and a locking spring (64); The sleeve (61) is sleeved on the adjusting column (62), and a locking hole (65) is provided on the side wall of the sleeve (61). The latch (63) is horizontally and slidably installed in the mounting hole on the side wall of the adjusting column (62). The latch (63) passes through the locking hole (65), and the locking spring (64) is provided between the latch (63) and the bottom of the mounting hole.

5. The coal mining face return air corner gas exhaust device according to claim 1, characterized in that: A tightening block (8) is provided at the top of the exhaust riser (1), and a sharp end is provided at the upper end of the tightening block (8), and the sharp end abuts against the tunnel roof.

6. The coal mining face return air corner gas exhaust device according to claim 5, characterized in that: A tightening spring (9) is provided between the tightening block (8) and the top of the exhaust riser (1).

7. The coal mining face return air corner gas exhaust device according to claim 1, characterized in that: The fan (5) is installed on the safety coal pillar.

8. The coal mining face return air corner gas exhaust device according to claim 1, characterized in that: The air guide pipe (4) is a flexible telescopic pipe.

9. The coal mining face return air corner gas exhaust device according to claim 1, characterized in that: A filter is provided at the air outlet at the top of the exhaust riser (1).

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