Wind and dust self-separation type coal mine underground drilling blowout preventer

Abstract

The utility model discloses a wind and dust self-separation type coal mine underground drilling blowout preventer which comprises an orifice dustproof tee joint (1), a slag discharge pipe (2), a spray hole extraction pipe A (5), a spray hole extraction pipe B (7), a buffer mechanism A (11) and a buffer mechanism B (12), the upper end of the orifice dustproof tee joint (1) is connected with one end of the deslagging pipe (2), the middle part of the deslagging pipe (2) is respectively connected with the spray orifice extraction pipe A (5) and the buffer mechanism B (12), and the other end of the deslagging pipe (2) is respectively connected with the spray orifice extraction pipe B (7) and the buffer mechanism A (11). The device has the advantages of double-layer dust collection, double-channel orifice shunting, flexible connection, safety redundancy, double buffering, high separation efficiency, timely gas treatment and good adaptability, ensures that gas exhausted from a hole does not enter a roadway space, and remarkably improves the safety and the environmental protection property of underground coal mine drilling operation.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine underground drilling safety technology, specifically relating to a wind and dust self-separating coal mine underground drilling blowout prevention device. Background Technology

[0002] In recent years, mine gas exceedance accidents have occurred frequently, especially in the geologically complex southwestern mining areas. Gas exceedances can also trigger serious disasters such as gas explosions, posing a direct threat to coal mine safety and the lives of miners. Drilling is a routine and necessary gas control measure and method for advanced detection underground. However, due to factors such as unstable coal seam gas occurrence and geological structure, the possibility of blowouts causing gas exceedances during compressed air drilling is relatively high. Simultaneously, the dust expelled during drilling causes serious pollution to the atmospheric environment of underground roadways. Therefore, blowout prevention and dust control devices are crucial to solving this problem. Current technologies for handling dust and gas rely on single-layer filtration or simple settling structures, resulting in low separation efficiency and easy pipe blockage. Blowout prevention devices often rely on a single channel, which is prone to overload during blowouts, leading to the mixing and leakage of coal dust and gas. Relying on a single extraction path, blowouts are prone to gas accumulation due to untimely handling. Furthermore, blowout prevention devices are mostly rigid pipes, lacking installation flexibility and unable to cope with sudden blowout situations. It also suffers from drawbacks such as reliance on manual monitoring and emergency response, delayed response, and insufficient safety redundancy. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a dust-free self-separating blowout prevention device for underground coal mine drilling, which features double-layer dust collection, dual-channel nozzle diversion, flexible connection, safety redundancy, double buffering, high separation efficiency, timely gas treatment, good adaptability, and ensures that the gas discharged from the hole does not enter the roadway space, thus significantly improving the safety and environmental protection of underground coal mine drilling operations.

[0004] The purpose of this utility model and the solution to its main technical problem are achieved by the following technical solution:

[0005] This utility model discloses a dust-free self-separating underground drilling blowout prevention device for coal mines, comprising a dustproof tee at the orifice, a slag discharge pipe, a blowout extraction pipe A, a blowout extraction pipe B, a buffer mechanism A, and a buffer mechanism B. The upper end of the dustproof tee at the orifice is connected to one end of the slag discharge pipe, the middle part of the slag discharge pipe is connected to the blowout extraction pipe A and the buffer mechanism B, and the other end of the slag discharge pipe is connected to the blowout extraction pipe B and the buffer mechanism A.

[0006] The dustproof tee at the orifice consists of a flexible filler, a drill pipe channel tube, and a slag discharge channel tube. The slag discharge channel tube is connected to the drill pipe channel tube at a 45° angle, and one end of the drill pipe channel tube is filled with filler.

[0007] The slag discharge pipe is respectively provided with an integrally connected nozzle channel pipe A, nozzle channel pipe B, dust channel pipe A, and dust channel pipe B. The dust channel pipe A is provided with a fixing groove A, and the dust channel pipe B is provided with a fixing groove B. The nozzle channel pipe A is connected to the nozzle extraction pipe A, and the nozzle channel pipe B is connected to the nozzle extraction pipe B.

[0008] The buffer mechanism A and buffer mechanism B are identical, both consisting of an air collecting bag, a dust collecting bag, an air collecting bag locking mechanism, a flexible tube, and an elastic rope. The dust collecting bag is smaller in volume than the air collecting bag and is placed inside the air collecting bag. The dust collecting bag locking mechanism is built into the air collecting belt locking mechanism. The tops of the air collecting bag and the dust collecting bag are sewn together. Both the air collecting bag and the dust collecting bag have circular openings, and an internal elastic rope is provided at the edge of the circular opening. The elastic rope is tied to the fixing groove A provided on the air and dust channel pipe A. The flexible tube is located on the upper outer side of the air collecting bag and is sealed to the outer side of the air collecting bag, while being internally connected. The other end of the flexible tube is connected to the underground negative pressure extraction pipe B. The other end of the flexible tube on buffer mechanism B is connected to the underground negative pressure extraction pipe C. The elastic rope on buffer mechanism B is tied to the fixing groove B provided on the air and dust channel pipe B.

[0009] The air collection bag is made of a non-breathable material.

[0010] The dust collection bag is made of breathable material.

[0011] The nozzle extraction pipe A and nozzle extraction pipe B are respectively equipped with filter screen A, automatic valve A, automatic valve B, and filter screen B. The nozzle extraction pipe A and nozzle extraction pipe B are respectively connected to the negative pressure extraction pipe A.

[0012] Compared with existing technologies, this utility model has significant advantages. As can be seen from the above technical solution: the upper end of the dustproof tee at the orifice is connected to one end of the slag discharge pipe; the middle part of the slag discharge pipe is connected to the nozzle extraction pipe A and the buffer mechanism B; and the other end of the slag discharge pipe is connected to the nozzle extraction pipe B and the buffer mechanism A. The buffer mechanism A and buffer mechanism B employ a double-layer structure combining an internal dust collection bag and an external air collection bag to achieve initial separation of coal slag and gas. The dust collection bag directly collects the coal slag discharged from the slag discharge pipe, reducing the entry of solid particles into the gas channel. The air collection belt filters residual dust in the gas, preventing blockage of the drill pipe channel, improving separation efficiency, and acting as a buffer. Through the dual-channel slag discharge pipe and nozzle extraction pipe in series, a double buffer structure is used to process dust and gas in stages. The dual channels formed by the slag discharge pipe and the nozzle extraction pipe respectively handle the coal slag from normal drilling and the sudden gas from the nozzle, avoiding cross-interference. This reduces the amount of coal dust carried and enhances stability. The system is equipped with a blowout extraction pipe to handle sudden gas outbursts, forming an independent extraction path with the slag discharge pipe. During blowouts, high-concentration gas is rapidly diverted to the extraction pipe, preventing gas from entering the roadway. Combined with negative pressure extraction technology, gas collection efficiency is improved, reducing the risk of explosion. Flexible pipes are used to connect the extraction device, and the modular design adapts to different drilling conditions. It is suitable for complex underground spaces, reducing installation difficulty and the risk of air leakage. The dustproof tee assembly at the orifice can be quickly disassembled for easy maintenance and adjustment. In summary, this invention features double-layer dust collection, dual-channel blowout diversion, flexible connection, safety redundancy, double buffering, high separation efficiency, timely gas treatment, and good adaptability, ensuring that gas discharged from the orifice does not enter the roadway space, significantly improving the safety and environmental protection of underground drilling operations in coal mines. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the dustproof tee with the orifice of this utility model;

[0015] Figure 3 This is a schematic diagram of the slag discharge pipe of this utility model;

[0016] Figure 4 This is a schematic diagram of the buffer mechanism of this utility model;

[0017] Figure 5 This is a diagram showing the usage state of this utility model;

[0018] Figure 6 yes Figure 5 Enlarged view of point a in the middle.

[0019] 1. Dustproof tee at the orifice; 2. Slag discharge pipe; 3. Filter screen A; 4. Automatic valve A; 5. Nozzle extraction pipe A; 6. Negative pressure extraction pipe A; 7. Nozzle extraction pipe B; 8. Automatic valve B; 9. Filter screen B; 10. Negative pressure extraction pipe B; 11. Buffer mechanism A; 12. Buffer mechanism B; 13. Negative pressure extraction pipe C. 101. Flexible filler; 102. Drill rod channel pipe; 103. Slag discharge channel pipe; 201. Nozzle channel pipe A; 202. Nozzle channel pipe B; 203. Dust and air channel pipe A; 204. Fixed groove A; 205. Dust and air channel pipe B; 206. Fixed groove B; 111. Air collection bag; 112. Dust collection bag; 113. Dust collection bag lock; 114. Air collection bag lock; 115. Flexible pipe; 116. Elastic rope; 14. Drill rod; 15. Hole wall; 16. Drill hole. Detailed Implementation

[0020] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structure, features, and effects of this utility model.

[0021] This utility model discloses a dust-free self-separating blowout prevention device for underground drilling in coal mines, comprising a dustproof tee at the orifice 1, a slag discharge pipe 2, a blowout extraction pipe A5, a blowout extraction pipe B7, a buffer mechanism A11, and a buffer mechanism B12. The upper end of the dustproof tee 1 is connected to one end of the slag discharge pipe 2. The middle section of the slag discharge pipe 2 is connected to the blowout extraction pipe A5 and the buffer mechanism B12, respectively. The other end of the slag discharge pipe 2 is connected to the blowout extraction pipe B7 and the buffer mechanism A11. The dustproof tee 1 is composed of a flexible filler 101, a drill rod channel pipe 102, and a slag discharge channel pipe 103. The slag discharge channel pipe 103 is connected to... The drill pipe channel pipe 102 is connected at a 45° angle. One end of the drill pipe channel pipe 102 is filled with filler material 101. The slag discharge pipe 2 is respectively provided with integrally connected nozzle channel pipes A201, B202, A203, and B205. A203 is provided with a fixing groove A204, and B205 is provided with a fixing groove B206. The nozzle channel pipe A201 is connected to the nozzle extraction pipe A5, and the nozzle channel pipe B202 is connected to the nozzle extraction pipe B7. The buffer mechanisms A11 and B12 are the same, both consisting of air collection. The system comprises a bag 111, a dust collection bag 112, an air collection bag locking 113, a dust collection bag locking 114, a flexible tube 115, and an elastic rope 116. The dust collection bag 112 is smaller in volume than the air collection bag 111 and is placed inside the air collection bag 111. The dust collection bag locking 114 is placed inside the air collection belt locking 113. The tops of the air collection bag 111 and the dust collection bag 112 are sewn together. Both the air collection bag 111 and the dust collection bag 112 have circular openings, and an inner elastic rope 116 is provided at the edge of the circular opening. The elastic rope 116 is tied to the fixing groove A20 on the dust duct pipe A203. 4. The flexible tube 115 is set on the upper part of the outer side of the air collecting bag 111. The flexible tube 115 is sealed to the outer side of the air collecting bag 111 and is internally connected. The other end of the flexible tube 115 is connected to the downhole negative pressure extraction pipe B10. The other end of the flexible tube 115 on the buffer mechanism B12 is connected to the downhole negative pressure extraction pipe C13. The elastic rope 116 on the buffer mechanism B12 is tied to the fixing groove B206 set on the air and dust channel pipe B205. The air collecting bag 111 is made of non-breathable material, and the dust collecting bag 112 is made of breathable material. The nozzle extraction pipe A5 and the nozzle extraction pipe B7 are respectively equipped with filter screen A3, automatic valve A4, automatic valve B8, and filter screen B9. The nozzle extraction pipe A5 and the nozzle extraction pipe B7 are respectively connected to the negative pressure extraction pipe A6.

[0022] When using, please refer to Figure 5First, a methane concentration sensor and a solenoid valve are installed on automatic valves A4 and B8 respectively. The dustproof tee 1 at the orifice is inserted into the pre-set hole in the borehole wall 15. Flexible filler is filled at the tail end between drill rod 14 and drill rod channel pipe 102 to reduce friction between drill rod 14 and the inner wall of drill rod channel pipe 102 during drilling, thus reducing drilling resistance. Drill rod 14 is inserted into drill rod channel pipe 102 for drilling. Two sets of series outlet pipes are installed at the outlet end of slag discharge pipe 2: nozzle channel pipe B202 and dust channel pipe A203, and nozzle channel pipe A201 and dust channel pipe B205. Coal dust discharged from nozzle channel pipe A201 and nozzle channel pipe B202 is filtered through filter screens A3 and B9 to prevent blockage of the extraction pipeline. A methane concentration sensor is linked with a solenoid valve. When an excessively high methane concentration is detected or a blowout occurs, the automatic valve opens automatically, drawing away the high-concentration methane directly through the negative pressure extraction pipe A6 underground. When the concentration decreases, the automatic valves A4 and B8 automatically close. This prevents a large amount of gas from gushing out during a blowout, which could lead to incomplete gas collection and its influx into the roadway. Negative pressure extraction pipes B10 and C13 extract gas. Dust collection bag 112 is made of breathable material, filtering gas flow rates of no less than 6 m³ / min, and is used to collect coal slag discharged from the borehole. Dust collection bag 112 collects coal slag discharged from the borehole, while air collection bag 111 is made of non-breathable material and is used to collect the discharged gas. Gas is extracted through negative pressure extraction pipes B10 and C13 respectively. Dust collection bag lock 114 and air collection belt lock 113 are generally set to the closed state. Dust collection bag lock 114 is used to discharge coal slag from dust collection bag 112, achieving dust and air separation control.

[0023] 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 way. Any simple modifications, equivalent changes, and alterations 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 scope of the technical solution of the present utility model.

Claims

1. A dust self-separation type coal mine underground drilling blowout prevention device, comprising a hole dustproof tee joint (1), a residue discharge pipe (2), a jet hole extraction pipe A (5), a jet hole extraction pipe B (7), a buffer mechanism A (11), and a buffer mechanism B (12), characterized in that; The orifice dustproof tee joint (1) is connected with the one end of the deslagging pipe (2), the deslagging pipe (2) is connected with the jet hole extraction pipe A (5) and the buffer mechanism B (12) respectively, and the other end of the deslagging pipe (2) is connected with the jet hole extraction pipe B (7) and the buffer mechanism A (11) respectively.

2. A windblown dust self-separation type coal mine downhole blowout prevention device according to claim 1, characterized in that; The orifice dustproof tee joint (1) is composed of a flexible filler (101), a drill rod passage pipe (102) and a deslagging passage pipe (103), the deslagging passage pipe (103) is connected with the drill rod passage pipe (102) at an angle of 45°, and the drill rod passage pipe (102) is filled with the filler (101) at one end.

3. The windblown dust self-separation type coal mine downhole blowout prevention device according to claim 1, characterized in that; The deslagging pipe (2) is provided with the jet hole passage pipe A (201), the jet hole passage pipe B (202), the dust passage pipe A (203) and the dust passage pipe B (205) which are connected in an integrated manner, the dust passage pipe A (203) is provided with the fixed groove A (204), the dust passage pipe B (205) is provided with the fixed groove B (206), the jet hole passage pipe A (201) is connected with the jet hole extraction pipe A (5), and the jet hole passage pipe B (202) is connected with the jet hole extraction pipe B (7).

4. The windblown dust self-separation type coal mine downhole blowout prevention device according to claim 1, characterized in that; The buffer mechanism A (11) and the buffer mechanism B (12) are the same and are composed of a wind collecting bag (111), a dust collecting bag (112), a wind collecting bag lock (113), a dust collecting bag lock (114), a flexible pipe (115) and an elastic rope (116), the dust collecting bag (112) is smaller than the wind collecting bag (111), the dust collecting bag (112) is arranged in the wind collecting bag (111), the dust collecting bag lock (114) is arranged in the wind collecting bag lock (113), the wind collecting bag (111) and the dust collecting bag (112) are integrated at the top, the wind collecting bag (111) and the dust collecting bag (112) are respectively provided with a circular opening, the elastic rope (116) is arranged on the fixed groove A (204) of the dust passage pipe A (203), the flexible pipe (115) is arranged on the upper part of the outside of the wind collecting bag (111), the flexible pipe (115) is sealingly connected with the outside of the wind collecting bag (111) and communicates with the inside, the other end of the flexible pipe (115) is connected with the downhole negative pressure extraction pipe B (10), the other end of the flexible pipe (115) of the buffer mechanism B (12) is connected with the downhole negative pressure extraction pipe C (13), and the elastic rope (116) of the buffer mechanism B (12) is bound on the fixed groove B (206) of the dust passage pipe B (205).

5. A windblown dust self-separation type coal mine downhole blowout prevention device according to claim 4, characterized in that; The wind collecting bag (111) is made of a non-breathable material.

6. A windblown dust self-separation type coal mine downhole blowout prevention device according to claim 4, characterized in that; The dust collecting bag (112) is made of a breathable material.

7. A windblown dust self-separation type coal mine downhole blowout prevention device according to claim 1, characterized in that; The jet hole extraction pipe A (5) and the jet hole extraction pipe B (7) are respectively provided with the filter screen A (3), the automatic valve A (4), the automatic valve B (8) and the filter screen B (9), and the jet hole extraction pipe A (5) and the jet hole extraction pipe B (7) are respectively connected with the negative pressure extraction pipe A (6).

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