A dustproof device for drilling in mines

Abstract

This utility model discloses a dust prevention device for mining drilling. A sealing device is installed on the outer circumference of a metal cylindrical shell. A dustproof door is fixed to one end of the metal cylindrical shell, and a drill rod opening is provided on the dustproof door. A steel water pipe is installed on the inner wall of the metal cylindrical shell, and multiple water mist nozzles are connected to the steel water pipe. A dustproof curtain is also installed on the inner wall of the metal cylindrical shell, and an outlet is located at the lowest point of the dustproof door. This utility model achieves circumferential sealing, atomized dust suppression, and graded interception of the borehole opening through the synergistic action of the rubber pad, water mist nozzles, and dustproof curtain. When the drill rod is operating in the hole, the dust-laden airflow and fine slag particles generated by the compressed air pass through the dust suppression and interception path inside the device, and are then orderly discharged through the slag discharge pipe via the side guide outlet, significantly reducing dust escape from the borehole opening. The device adopts an integrated structure and can be directly inserted into the drill hole; after the rubber pad is inflated, it forms reliable support and positioning with the borehole wall, effectively preventing detachment and air leakage, improving the installation efficiency and dust prevention stability of underground operations.

Description

Technical Field

[0001] This utility model relates to a dust prevention device for mining drilling, belonging to the technical field of dust prevention equipment for drilling. Background Technology

[0002] In underground metal mines, drilling is essential for operations such as stope recovery, roadway excavation, water exploration and drainage, blasting hole construction, and anchor bolt hole installation. Compressed air is used for slag removal to clean the borehole. However, drilling generates significant dust in the confined working space, and compressed air slag removal ejects fine rock powder and mud from the borehole opening. Currently, a common, simple dust control method involves inserting strips of cloth, plastic bags, or rubber sleeves into the borehole opening, inserting a rubber tube, and injecting water into the tube. This mixes the ejected rock powder with the water, which then exits from the end of the tube. Workers then judge the drilling progress based on changes in the color, particle size, and flow rate of the water-bearing rock powder ejected from the tube. However, these temporary dust control devices generally suffer from poor sealing and significant dust leakage, affecting the safety and efficiency of underground metal mine operations. Utility Model Content

[0003] The purpose of this invention is to provide a dust control device for mining drilling. It replaces the temporary assembly structure with a modular, integrated, standardized interface dust control device that can be quickly assembled and disassembled. This achieves a coordinated system of circumferential sealing at the borehole opening, atomized dust suppression, and orderly dust collection, effectively preventing problems such as sealing instability, passive detachment, and secondary dust generation of simple materials under high-pressure airflow, thus improving sealing reliability and operational safety.

[0004] The technical solution of this utility model is as follows: A dust prevention device for mining drilling includes a metal cylindrical shell, a sealing device on the outer periphery of the metal cylindrical shell, a dustproof door fixedly connected to one end of the metal cylindrical shell, a drill rod opening on the dustproof door, a steel water pipe arranged along its length on the inner wall of the metal cylindrical shell, multiple water mist nozzles connected to the steel water pipe, a dustproof curtain also arranged on the inner wall of the metal cylindrical shell, and an outlet at the lowest position of the dustproof door.

[0005] In the aforementioned dust prevention device for mining drilling, two steel water pipes are symmetrically arranged on the left and right sides, distributed in the middle of the inner wall of the metal cylindrical shell, and the water mist nozzles are arranged facing the center.

[0006] In the aforementioned dust prevention device for mining drilling, the water mist nozzle is threadedly connected to a steel water pipe.

[0007] In the aforementioned dust prevention device for mining drilling, the sealing device is an inflatable rubber pad, which has an inflation port and an vent.

[0008] In the aforementioned dust prevention device for mining drilling, the dustproof door is fixedly connected to the end face of the metal cylindrical shell by bolts.

[0009] In the aforementioned dust control device for mining drilling, a steel pipe is threadedly connected to the outlet, and a long rubber tube is connected to the other end of the steel pipe by a clamp.

[0010] In the aforementioned dust prevention device for mining drilling, the dust curtain is composed of multiple brush body structures arranged in a ring array on the inner wall of a metal cylindrical shell. Each brush body structure includes an arc-shaped mounting block with several brush bristles on it. The arc-shaped mounting block is fixed to the inner wall of the metal cylindrical shell by screws.

[0011] In the aforementioned dust prevention device for mining drilling, two dust curtains are arranged at intervals, and at least one water mist nozzle is installed on the steel water pipe in front of each dust curtain.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, the dust prevention device for mining drilling of this utility model achieves circumferential sealing, atomized dust suppression, and graded interception of the borehole opening through the synergistic effect of an inflatable rubber pad, water mist nozzles, and dust curtains. When the drill rod is working in the hole, the dust-laden airflow and fine slag particles generated by the compressed air pass through the dust suppression and interception path inside the device and are then orderly discharged through the slag discharge pipe via the side guide port, significantly reducing the escape of dust from the borehole opening. The device adopts an integrated structure and can be directly inserted into the drill hole; after the rubber pad is inflated, it forms reliable support and positioning with the borehole wall, effectively preventing detachment and air leakage, and improving the installation efficiency and dust prevention stability of underground operations. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 2 This is a front structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the dust curtain structure.

[0016] Reference numerals: 1-Metal cylindrical outer shell, 2-Water mist nozzle, 3-Dust curtain, 301-Arc-shaped mounting block, 302-Brush bristles, 4-Steel water pipe, 5-Sealing device, 6-Exhaust port, 601-Steel pipe, 602-Long rubber hose, 7-Drill rod inlet, 8-Air vent, 9-Dustproof door, 10-Bolt. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0018] An embodiment of this utility model: A dustproof device for mining drilling includes a metal cylindrical shell 1, an inflatable sealing device 5 wrapped around the outer periphery of the metal cylindrical shell 1, a dustproof door 9 fixedly connected to one end of the metal cylindrical shell 1, a drill rod opening 7 on the dustproof door 9 for the drill rod to be inserted, a steel water pipe 4 arranged along its length on the inner wall of the metal cylindrical shell 1, a plurality of water mist nozzles 2 connected to the steel water pipe 4, a through hole on the dustproof door 9 for the steel water pipe 4 to pass through, so that the steel water pipe 4 extends to the outside of the dustproof door 9 to connect with an external water source, a dustproof curtain 3 is also arranged on the inner wall of the metal cylindrical shell 1, and an outlet 6 is provided at the lowest position of the dustproof door 9.

[0019] Two steel water pipes 4 are symmetrically arranged on the left and right sides, distributed in the middle of the inner wall of the metal cylindrical shell 1. The water mist nozzles 2 are set towards the center, which can effectively reduce dust in the airflow.

[0020] The water mist nozzle 2 is threadedly connected to the steel water pipe 4. This allows for easy replacement in case the water mist nozzle 2 is damaged.

[0021] The sealing device 5 is an inflatable rubber pad with an inflation port and a deflation port 8. During drilling, air is inflated through the inflation port, causing the rubber pad to expand and form a circumferential seal between the metal cylindrical outer shell 1 and the borehole wall, thus reducing air leakage and dust escape. When sealing is not required, air can be released through the deflation port, which also facilitates the movement of the device.

[0022] Multiple dustproof doors 9 are provided, and different dustproof doors 9 are equipped with drill rod openings 7 of different diameters, which can be used for drilling operations with drill rods of different diameters. The dustproof doors 9 are fixedly connected to the end face of the metal cylindrical shell 1 by bolts 10. When changing drill rods of different diameters, or when other internal components of the metal cylindrical shell 1 are damaged and need to be replaced, the dustproof doors 9 can be quickly installed and removed.

[0023] The discharge outlet is threaded with a steel pipe 601 at 6 locations. The other end of the steel pipe 601 is connected to a long rubber tube 602 via a clamp. This structure can collect the discharged dusty wastewater and also facilitates the installation, disassembly, and replacement of the steel pipe 601 and the long rubber tube 602.

[0024] The dust curtain 3 is composed of multiple brush-shaped structures arranged in a ring on the inner wall of the metal cylindrical shell 1. Each brush-shaped structure includes an arc-shaped mounting block 301 with several brush bristles 302. The arc-shaped mounting block 301 and the brush bristles 302 form a brush-like structure. The arc-shaped mounting block 301 is fixed to the inner wall of the metal cylindrical shell 1 with screws. This structure can block the airflow carrying dust. When a brush-shaped structure is damaged, it can be quickly replaced. The dust curtain 3 is a brush-type structure composed of multiple bundles of dense brush bristles 302 arranged circumferentially along the inner wall of the shell. During the installation process, the thick curtains at the top and bottom of the rubber curtain 3 overlap in the middle to form a self-resetting through hole. It opens under the axial thrust of the drill rod and closes under the rubber elasticity of the brush bristles 302 after the rod is withdrawn. Thus, the dust curtain 3 effectively blocks the airflow carrying dust, causing the dust and water mist mixture to settle and be discharged through the outlet 6.

[0025] The dustproof curtain 3 is provided in two layers at intervals. This structure can effectively block the dust-laden airflow. At least one water mist nozzle 2 is provided on the steel water pipe 4 in front of each dustproof curtain 3. The water mist sprayed by the water mist nozzle 2 can make the blocked dust-laden airflow settle quickly.

[0026] When using this invention for drilling into rock walls or coal seams, first, a metal cylindrical shell 1, with a steel water pipe 4 fixed to it and a sealing device 5 wrapped around it, is placed into the borehole. Then, a water mist nozzle 2 and a dust curtain 3 are installed inside the metal cylindrical shell 1. The air inlet on the sealing device 5—the rubber pad—is inflated to cause the rubber pad to expand radially and form a circumferential seal with the borehole wall. Next, the dust door 9 is fixed to the metal cylindrical shell 1 with bolts 10. Finally, a steel pipe 601 and a long rubber tube 602 are fixed to the outlet 6. Drilling begins after the drill rod passes through the drill rod opening 7 and the dust curtain 3. During the drilling process, the high-pressure airflow inside the drill rod carries out the waste residue from the borehole. The dust-laden airflow is blocked by the rubber pad, causing it to enter the metal cylindrical shell 1. Inside the metal cylindrical shell 1, the dust is suppressed by the water mist nozzle 2, intercepted in stages by the dust curtain 3, and finally discharged in an orderly manner through the outlet 6 on the lower side of the device under the flow-limiting and guiding effect of the dust door 9.

Claims

1. A dust prevention device for mining drilling, characterized in that: It includes a metal cylindrical shell (1), a sealing device (5) is provided on the outer periphery of the metal cylindrical shell (1), a dustproof door (9) is fixedly connected to one end of the metal cylindrical shell (1), a drill rod opening (7) is provided on the dustproof door (9), a steel water pipe (4) is provided on the inner wall of the metal cylindrical shell (1) along its length direction, multiple water mist nozzles (2) are connected to the steel water pipe (4), a dustproof curtain (3) is also provided on the inner wall of the metal cylindrical shell (1), and an outlet (6) is provided at the lowest position on the dustproof door (9).

2. The dust prevention device for mining drilling according to claim 1, characterized in that: Two steel water pipes (4) are symmetrically arranged on the left and right sides, distributed in the middle of the inner wall of the metal cylindrical shell (1), and the water mist nozzles (2) are arranged facing the center.

3. The dust suppression device for mining drilling according to claim 1, characterized in that: The water mist nozzle (2) is threaded onto the steel water pipe (4).

4. The dust prevention device for mining drilling according to claim 1, characterized in that: The sealing device (5) is an inflatable rubber pad, and the rubber pad is provided with an inflation port and an vent (8).

5. A dust suppression device for mining drilling according to claim 1, characterized in that: The dustproof door (9) is fixedly connected to the end face of the metal cylindrical shell (1) by bolts (10).

6. A dust suppression device for mining drilling according to claim 1, characterized in that: A steel pipe (601) is threadedly connected to the outlet (6), and a long rubber tube (602) is connected to the other end of the steel pipe (601) by a clamp.

7. A dust prevention device for mining drilling according to claim 1, characterized in that: The dustproof curtain (3) is composed of multiple brush body structures arranged in a ring array on the inner wall of the metal cylindrical shell (1). Each brush body structure includes an arc-shaped mounting block (301), and the arc-shaped mounting block (301) is provided with several brush bristles (302). The arc-shaped mounting block (301) is fixed to the inner wall of the metal cylindrical shell (1) by screws.

8. A dust prevention device for mining drilling according to claim 1, characterized in that: The dust curtain (3) is provided in two layers at intervals, and at least one water mist nozzle (2) is provided on the steel water pipe (4) in front of each dust curtain (3).

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