A dustproof and blowout prevention device for coal mine gas control drilling hole

Abstract

The utility model relates to gas control technical field discloses a coal mine gas control drilling dustproof anti -spouting hole device, including drilling machine, the drilling machine inside rotationally connected has the drill bit, drilling machine one end fixedly connected with the protection shell, drilling machine one end fixedly connected with the power device, the power device bottom fixedly connected with the gear, the protection shell inside slidingly connected with the sliding ring, sliding ring one side fixedly connected with the rack, the gear with the rack engages, the sliding ring inside fixedly connected with the rubber ring, the sliding ring inside fixedly connected with the residue inlet, in the utility model, can effectively intercept the high pressure gas and coal rock debris spouting hole that can appear in the drilling process, avoid the gas leakage in large quantities to lead to the operation surface concentration to exceed the standard and the explosion risk, reduce the damage of coal rock debris to personnel equipment, the effect of significantly enhancing the operation safety.

Description

Technical Field

[0001] This utility model relates to the field of gas control technology, and in particular to a dust prevention and blowout prevention device for drilling holes in coal mine gas control. Background Technology

[0002] With the advancement of coal mining technology and the widespread application of techniques such as one-time full-height mining of extra-thick coal seams and fully mechanized top-coal caving, the speed of face advancement is accelerating, and the amount of gas emission is increasing. Previously low-gas mines have become high-gas mines, making blowouts a common dynamic phenomenon in boreholes. During blowouts, large amounts of high-concentration gas and coal dust gush out of the borehole. The powerful impact and dust generated can easily injure workers and cause significant inconvenience to construction work.

[0003] In current coal mine gas control drilling operations, the absence of blowout prevention devices can easily lead to uncontrolled gas blowouts, resulting in high-concentration gas leaks that reach the explosion limit. If these leaks encounter an ignition source, they can trigger a gas explosion. Furthermore, the high-speed ejection of coal and rock debris can injure people and damage property, reduce gas extraction efficiency, and cause gas accumulation at the working face. Without water spray devices, coal dust concentrations can exceed standards, increasing the risk of coal dust explosions and the probability of pneumoconiosis. Additionally, drill bits are prone to failure due to overheating from friction, potentially igniting gas or coal dust. High dust concentrations also deteriorate the working environment and affect construction efficiency. Therefore, a dust prevention and blowout prevention device for coal mine gas control drilling is proposed to address these problems. Summary of the Invention

[0004] To overcome the above deficiencies, this utility model provides a dust and blowout prevention device for coal mine gas control drilling. It aims to improve existing drilling devices by adding blowout prevention holes and water spraying devices, which can effectively reduce the risk of gas and coal dust explosions, reduce personnel and equipment damage, improve extraction efficiency and working environment quality, and ensure safe and efficient operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A coal mine gas control drilling dust prevention and blowout prevention device includes a drilling rig, a drill bit rotatably connected inside the drilling rig, a protective shell fixedly connected to one end of the drilling rig, a power unit fixedly connected to one end of the drilling rig, a gear fixedly connected to the bottom of the power unit, a sliding ring slidably connected inside the protective shell, a rack fixedly connected to one side of the sliding ring, the gear and the rack meshing, a rubber ring fixedly connected inside the sliding ring, a slag inlet fixedly connected inside the sliding ring, and a limit ring rotatably connected to the end of the slag inlet near the rubber ring.

[0006] As a further description of the above technical solution: A water pump is installed at the end of the drilling rig away from the drill bit, and a water pipe is fixedly connected to the output end of the water pump. A slag discharge port is fixedly connected to the bottom of the drilling rig.

[0007] As a further description of the above technical solution: A vacuum pump is installed at the end of the drilling rig away from the drill bit. An air pipe is fixedly connected to the input end of the vacuum pump, and the other end of the air pipe is fixedly connected to the top of the drilling rig.

[0008] As a further description of the above technical solution: The drill bit is rotatably connected inside the rubber ring.

[0009] As a further description of the above technical solution: The drill bit is fixedly connected inside the limiting ring.

[0010] As a further description of the above technical solution: The vacuum pump is equipped with a gas collecting pipe at the top, and a second gas pipe is fixedly connected to the output end of the vacuum pump. The other end of the second gas pipe is fixedly connected to the bottom of the gas collecting pipe.

[0011] As a further description of the above technical solution: The power unit is fixedly connected inside the protective shell.

[0012] As a further description of the above technical solution: The drill bit is rotatably connected inside the slag inlet.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the power device and gear structure drive the rack, sliding ring and rubber ring structure to work, thereby effectively intercepting high-pressure gas and coal and rock debris that may occur during drilling, avoiding excessive gas leakage that could lead to excessive concentration at the working face and the risk of explosion, reducing damage to personnel and equipment from coal and rock debris, ensuring orderly gas extraction to improve efficiency, and significantly enhancing operational safety.

[0014] 2. In this utility model, with the cooperation of water pump and water pipe structure, the drilling rig can effectively reduce the concentration of coal dust generated during drilling by water mist, thereby reducing the risk of coal dust explosion and pneumoconiosis of workers. At the same time, it can cool the drill bit that is subjected to high-speed friction, preventing it from failing due to overheating or becoming a source of ignition for gas or coal dust, reducing the wear and malfunction of equipment caused by dust, and improving the overall safety and health of the operation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a coal mine gas control borehole dust prevention and blowout prevention device proposed in this utility model; Figure 2 This is a schematic diagram of the drilling rig for a coal mine gas control drilling dust prevention and blowout prevention device proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0016] Legend: 1. Water pump; 2. Vacuum pump; 3. Water pipe; 4. Air pipe one; 5. Air pipe two; 6. Air collection pipe; 7. Drill bit; 8. Slag discharge port; 9. Slag inlet; 10. Drilling rig; 11. Limiting ring; 12. Rubber ring; 13. Sliding ring; 14. Rack; 15. Gear; 16. Power unit; 17. Protective shell. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 1-3 This utility model provides an embodiment of a coal mine gas control drilling dust prevention and blowout prevention device, including a drilling rig 10. The main body of the drilling rig 10 is made of high-strength alloy steel to ensure the rigidity of the overall structure. A drill bit 7 is rotatably connected inside the drilling rig 10. The drill bit 7 is made of hard alloy material, which has high wear resistance and impact resistance and can efficiently break coal and rock. A protective shell 17 is fixedly connected to one end of the drilling rig 10, and a power device 16 is fixedly connected to one end of the drilling rig 10. A gear 15 is fixedly connected to the bottom of the power device 16. A sliding ring 13 is slidably connected inside the protective shell 17. A rack 14 is fixedly connected to one side of the sliding ring 13. The gear 15 and the rack 14 mesh. A rubber ring 12 is fixedly connected inside the sliding ring 13. The system is equipped with a slag inlet 9, which is made of wear-resistant cast steel with a smooth inner wall to reduce the resistance of coal slag transportation. A limit ring 11 is rotatably connected to one end of the slag inlet 9 near the rubber ring 12. The drill bit 7 is rotatably connected inside the rubber ring 12 and fixedly connected inside the limit ring 11. The power unit 16 is fixedly connected inside the protective shell 17 and rotatably connected inside the slag inlet 9. The rubber ring 12 fixed inside the sliding ring 13 tightly wraps the outer wall of the drill bit 7, forming a dynamic sealing structure. The rubber ring 12 keeps in contact with the limit ring 11 through elastic deformation, which can prevent high-pressure gas and coal slag in the borehole from splashing to the outside. The protective shell 17 serves as an outer layer of protection, further intercepting possible leaks of gas and debris, forming a double protection.

[0019] Reference Figure 1 and Figure 2A water pump 1 is installed at the end of the drilling rig 10 furthest from the drill bit 7. A water pipe 3 is fixedly connected to the output end of the water pump 1. A slag discharge port 8 is fixedly connected to the bottom of the drilling rig 10. The water pump 1 serves as a power source, delivering water to the interior of the drilling rig 10 through the water pipe 3. The water flow cools the drill bit 7, preventing it from overheating and being damaged due to prolonged high-speed friction. Simultaneously, the water mixes with the coal dust generated during drilling, reducing dust dispersion in the working environment. A vacuum pump 2 is installed at the end of the drilling rig 10 furthest from the drill bit 7. After the vacuum pump 2 is started, it draws gas from the top of the drilling rig 10 through the gas pipe 4 connected to the input end, forming a negative pressure environment. This negative pressure can help to draw the gas and gas mixed with coal dust generated during the drilling process into the channel inside the drilling rig 10, which is convenient for subsequent processing. The input end of the vacuum pump 2 is fixedly connected to the gas pipe 4, and the other end of the gas pipe 4 is fixedly connected to the top of the drilling rig 10. The top of the vacuum pump 2 is equipped with a gas collecting pipe 6, and the output end of the vacuum pump 2 is fixedly connected to the gas pipe 5, and the other end of the gas pipe 5 is fixedly connected to the bottom of the gas collecting pipe 6.

[0020] Working principle: When the drilling rig 10 is started, the drill bit 7 inside the drilling rig 10 rotates rapidly. A protective shell 17 is fixedly connected to one end of the drilling rig 10. A power unit 16 is fixedly connected inside the protective shell 17. When a large amount of gas is detected, the power unit 16 is started and its bottom gear 15 rotates accordingly. Since the gear 15 meshes with the rack 14 on one side of the sliding ring 13, it drives the sliding ring 13 and the slag inlet 9 to slide inside the protective shell 17. A limit ring 11 is fixedly connected to the outside of the drill bit 7. The sliding ring 13 drives the rubber ring 12 to fit tightly along the drill bit 7 towards the limit ring 11, effectively intercepting the high-pressure gas and coal and rock debris generated during the drilling process, thus achieving the purpose of blowout prevention.

[0021] Meanwhile, water pump 1 delivers water through water pipe 3, and the water mist formed inside drilling rig 10 reduces the concentration of coal dust generated during drilling and cools the high-speed friction drill bit 7. Vacuum pump 2 extracts gas through gas pipe 4 and transports gas in the drilling area through gas pipe 5 to gas collection pipe 6 for centralized collection. Coal slag generated during drilling will enter the slag discharge channel through slag inlet 9 and finally be discharged through slag outlet 8, ensuring the safe and efficient operation of coal mine gas control drilling.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust and blowout prevention device for coal mine gas control drilling, comprising a drilling rig (10), characterized in that: The drill bit (7) is rotatably connected inside the drill rig (10). A protective shell (17) is fixedly connected to one end of the drill rig (10). A power device (16) is fixedly connected to one end of the drill rig (10). A gear (15) is fixedly connected to the bottom of the power device (16). A sliding ring (13) is slidably connected inside the protective shell (17). A rack (14) is fixedly connected to one side of the sliding ring (13). The gear (15) and the rack (14) mesh. A rubber ring (12) is fixedly connected inside the sliding ring (13). A slag inlet (9) is fixedly connected inside the sliding ring (13). A limit ring (11) is rotatably connected to the end of the slag inlet (9) near the rubber ring (12).

2. The dust prevention and blowout prevention device for coal mine gas control drilling according to claim 1, characterized in that: A water pump (1) is provided at the end of the drilling rig (10) away from the drill bit (7), and a water pipe (3) is fixedly connected to the output end of the water pump (1). A slag discharge port (8) is fixedly connected to the bottom of the drilling rig (10).

3. The dust and blowout prevention device for coal mine gas control drilling according to claim 1, characterized in that: A vacuum pump (2) is provided at one end of the drilling rig (10) away from the drill bit (7). The input end of the vacuum pump (2) is fixedly connected to an air pipe (4), and the other end of the air pipe (4) is fixedly connected to the top of the drilling rig (10).

4. The dust and blowout prevention device for coal mine gas control drilling according to claim 1, characterized in that: The drill bit (7) is rotatably connected inside the rubber ring (12).

5. The dust and blowout prevention device for coal mine gas control drilling according to claim 1, characterized in that: The drill bit (7) is fixedly connected inside the limiting ring (11).

6. The dust and blowout prevention device for coal mine gas control drilling according to claim 3, characterized in that: The vacuum pump (2) is provided with a gas collecting pipe (6) at the top, and the output end of the vacuum pump (2) is fixedly connected to a second gas pipe (5), and the other end of the second gas pipe (5) is fixedly connected to the bottom of the gas collecting pipe (6).

7. The dust and blowout prevention device for coal mine gas control drilling according to claim 1, characterized in that: The power unit (16) is fixedly connected inside the protective shell (17).

8. The dust and blowout prevention device for coal mine gas control drilling according to claim 1, characterized in that: The drill bit (7) is rotatably connected inside the slag inlet (9).

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