A new type of air-water switching device for coal mine drilling operation

Abstract

The utility model discloses a novel air and water switching device for coal mine drilling operation, including the main body pipeline of both ends plugging, be equipped with the drainage tube on the lateral wall of main body pipeline, and the drainage tube is linked with main body pipeline and is connected the water change of drill rod tail through high pressure pipe, the opposite side of main body pipeline with drainage tube is equipped with first flow guide tube, second flow guide tube and third flow guide tube respectively, and all is equipped with stop valve on the drainage tube, first flow guide tube, second flow guide tube and third flow guide tube, and first flow guide tube and second flow guide tube are connected inlet pipe and air inlet pipe respectively, and third flow guide tube connects gas extraction pipe. When drilling by compressed air construction, if there is gas emission in the drilling, and the spray hole appears, immediately close the stop valve on the second flow guide tube, open the stop valve of third flow guide tube, use the negative pressure in the gas pipe to extract the gas in the drilling, realize the gas direct extraction from the drill rod, prevent the gas emission in the drilling, cause the gas fluctuation in the roadway, and overrun.

Description

Technical Field

[0001] This utility model belongs to the field of drilling equipment technology, specifically relating to a novel air-water switching device for coal mine drilling operations. Background Technology

[0002] The rock strata at the drilling point are soft and broken with poor ventilation. When using water to remove slag during drilling, it is easy to cause borehole collapse and blockage. Therefore, compressed air drilling is used. During compressed air drilling, a ventilation-water switching device must be used. The ventilation-water switching device can reduce the intensity of the blowout and play a role in fire prevention and dust suppression, and even prevent accidents such as injuries. However, the ventilation-water switching device also has drawbacks. When gas surges out of the borehole, the traditional ventilation-water switching device cannot handle the gas, which can easily cause gas to surge out and exceed the limit. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a novel ventilation and water switching device for coal mine drilling operations.

[0004] The technical solution adopted by this utility model is a novel air-water switching device for coal mine drilling operations, including a main pipeline sealed at both ends, a diversion pipe provided on the side wall of the main pipeline, the diversion pipe being connected to the main pipeline and connected to the water transformer at the tail of the drill rod through a high-pressure pipe, a first guide pipe, a second guide pipe and a third guide pipe respectively provided on the side of the main pipeline opposite to the diversion pipe, and a shut-off valve provided on the diversion pipe, the first guide pipe, the second guide pipe and the third guide pipe, respectively, the first guide pipe and the second guide pipe being connected to the water inlet pipe and the air inlet pipe, and the third guide pipe being connected to the gas extraction pipe.

[0005] Preferably, the main pipe is made of 4-inch pipe with a length of 500mm.

[0006] Preferably, the above-mentioned drainage pipe, first guide pipe, second guide pipe and third guide pipe are all welded to the main pipe using a 1.5-inch pipe.

[0007] Preferably, the gas extraction pipe is connected to the extraction pipe via a flange, and the extraction pipe is connected to the slag remover. The slag remover includes a box body, with an inlet at the top of the box body connected to the extraction pipe. The extraction pipe extends into the bottom of the box body, a slag discharge pipe is provided on one side of the box body, and a drain pipe is provided at the bottom of the other side of the box body. The outlet of the drain pipe is close to the top of the box body, and an exhaust pipe is also provided at the top of the box body to connect to the main gas pipe.

[0008] Compared with the prior art, the beneficial effect of this utility model is that when using compressed air for drilling, all high-pressure pipes are connected in place. During normal drilling, if gas gushes out of the borehole and a blowout occurs, the shut-off valve on the second guide pipe is immediately closed and the shut-off valve on the third guide pipe is opened. The negative pressure in the gas pipe is used to extract the gas from the borehole, so that the gas is directly extracted from the drill rod, preventing the gas from gushing out of the borehole and causing gas fluctuations and exceeding limits in the roadway. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0010] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0011] Example 1 like Figure 1 As shown, a novel air-water switching device for coal mine drilling operations includes a main pipe 1 sealed at both ends. A diversion pipe 2 is provided on the side wall of the main pipe 1. The diversion pipe 2 is connected to the main pipe 1 and connected to the water transformer at the tail of the drill rod through a high-pressure pipe. A first guide pipe 3, a second guide pipe 4, and a third guide pipe 5 are respectively provided on the side of the main pipe 1 opposite to the diversion pipe 2. Each of the diversion pipe 2, the first guide pipe 3, the second guide pipe 4, and the third guide pipe 5 is equipped with a shut-off valve. The first guide pipe 3 and the second guide pipe 4 are respectively connected to the water inlet pipe 6 and the air inlet pipe 7, and the third guide pipe 5 is connected to the gas extraction pipe 8.

[0012] The gas extraction pipe 8 is connected to the extraction pipe 9 via a flange. The extraction pipe 9 is connected to the slag remover 10. The slag remover 10 includes a housing 11. An inlet 12 is opened at the top of the housing 11 to connect to the extraction pipe 9. The extraction pipe 9 extends into the bottom of the housing 11. A slag discharge pipe 13 is provided on one side of the housing 11, and a drain pipe 14 is provided at the bottom of the other side of the housing 11. The outlet of the drain pipe 14 is near the top of the housing 11. An exhaust pipe 15 is also provided at the top of the housing 11 to connect to the main gas pipe. When the gas extraction pipe is in operation, the extracted gas and coal slag enter the slag remover together. The gas is discharged from the exhaust pipe, while the coal slag and water remain in the housing and are periodically discharged.

[0013] Furthermore, the main pipe 1 is made of 4-inch pipe with a length of 500mm; the drainage pipe 2, the first guide pipe 3, the second guide pipe 4 and the third guide pipe 5 are all made of 1.5-inch pipe and welded to the main pipe 1; the stop valve is a 19 stop valve.

[0014] When using compressed air for drilling, ensure all high-pressure pipes are connected in place and proceed with normal drilling. If gas gushes out of the borehole and a blowout occurs, immediately close the shut-off valve on the second guide pipe and open the shut-off valve on the third guide pipe. Utilize the negative pressure within the gas pipe to extract the gas from the borehole, allowing the gas to be directly extracted from the drill rod, preventing gas gushes out of the borehole and causing gas fluctuations or exceeding limits in the roadway.

[0015] This device is made from recycled 4-inch and 1.5-inch pipes, making it easy to manufacture, simple in structure, and convenient to use. On one hand, it directly removes gas from the borehole, preventing gas levels from exceeding limits and increasing safety and reliability during drilling. On the other hand, it is lightweight and easy to install, reducing the labor intensity for workers.

[0016] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A novel ventilation and water switching device for coal mine drilling operations, characterized in that, The main pipe (1) is sealed at both ends. A diversion pipe (2) is provided on the side wall of the main pipe (1). The diversion pipe (2) is connected to the main pipe (1) and connected to the water transformer at the tail of the drill rod through a high-pressure pipe. A first guide pipe (3), a second guide pipe (4) and a third guide pipe (5) are respectively provided on the side of the main pipe (1) opposite to the diversion pipe (2). A shut-off valve is provided on the diversion pipe (2), the first guide pipe (3), the second guide pipe (4) and the third guide pipe (5). The first guide pipe (3) and the second guide pipe (4) are respectively connected to the water inlet pipe (6) and the air inlet pipe (7). The third guide pipe (5) is connected to the gas extraction pipe (8).

2. The novel ventilation and water switching device for coal mine drilling operations according to claim 1, characterized in that, The main pipe (1) is made of 4-inch pipe with a length of 500mm.

3. A novel ventilation and water switching device for coal mine drilling operations according to claim 1, characterized in that, The drainage pipe (2), the first guide pipe (3), the second guide pipe (4) and the third guide pipe (5) are all welded to the main pipe (1) using a 1.5-inch pipe.

4. A novel ventilation and water switching device for coal mine drilling operations according to claim 1, characterized in that, The gas extraction pipe (8) is connected to the extraction pipe (9) via a flange. The extraction pipe (9) is connected to the slag remover (10). The slag remover (10) includes a box (11). An inlet (12) is opened at the top of the box (11) to connect to the extraction pipe (9). The extraction pipe (9) extends into the bottom of the box (11). A slag discharge pipe (13) is provided on one side of the box (11). A drain pipe (14) is provided at the bottom of the other side of the box. The outlet of the drain pipe (14) is close to the top of the box (11). An exhaust pipe (15) is also provided at the top of the box (11) to connect to the main gas pipe.

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