Coal mine gas extraction drill hole gas anti-overflow device

Abstract

The utility model belongs to the technical field of coal mine gas extraction, and particularly relates to a coal mine gas extraction drill hole gas anti-overflow device which comprises a main shell, an exhaust fan is arranged on the top side of the main shell, an air guide plate is arranged on the main shell on the rear side of the exhaust fan, the bottom end of the air guide plate is connected with a bottom plate, and a side plate is arranged on the bottom plate on the rear side of the air guide plate. The bottom side of the main shell is communicated with a water inlet of a water pump, a water outlet of the water pump is connected with the bottom end of a water supply pipe, the top end of the water supply pipe is connected with a water distribution pipe, the bottom of the water distribution pipe is provided with a spraying head, and the main shell on the two sides of the spraying head is provided with a cover body. The interior of the main shell communicates with a cover body through an air inlet groove, and the cover body is connected with one end of an air inlet pipe. Part of impurities in gas entering the main shell through the gas inlet pipe can be dissolved in a water body sprayed by the spray header, and the filler can effectively increase the contact area between the gas and the water body, so that the cost and difficulty of subsequent gas separation are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine gas extraction, and in particular relates to a coal mine gas extraction drilling hole gas overflow prevention device. Background Art

[0002] During coal mining, gas extraction holes are usually drilled in the coal seams. In order to avoid gas leakage and explosion in the mine, the gas needs to be extracted. During the underground construction drilling process, when the drill rod enters the coal seam, a large amount of gas, accompanied by dust and water, rushes out of the borehole instantly, which can easily form a spray hole dynamic phenomenon at the borehole mouth. If it cannot be well controlled, it can easily cause gas exceeding the limit and cause safety accidents, which is not conducive to safe underground construction.

[0003] The utility model patent with the authorization announcement number CN210483795U discloses a gas overflow prevention device for coal mine gas extraction drilling, which can effectively prevent the gas out of control at the slag outlet during the gas extraction drilling construction process. However, the above structure cannot effectively remove impurities such as carbon dioxide and hydrogen sulfide in the ejected gas, thereby reducing the difficulty of subsequent gas separation and treatment. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a coal mine gas extraction drilling gas overflow prevention device to solve the problem that the existing drilling hole gas overflow prevention device cannot effectively remove impurities such as carbon dioxide and hydrogen sulfide in the ejected gas, thereby reducing the difficulty of subsequent gas separation and treatment.

[0005] To achieve the above objectives, the utility model adopts the following technical solution: a coal mine gas extraction drilling gas overflow prevention device, comprising a main shell, an exhaust fan is arranged on the top side of the main shell, an air guide plate is arranged on the main shell at the rear side of the exhaust fan, the bottom end of the air guide plate is connected with a bottom plate, a side plate is arranged on the bottom plate at the rear side of the air guide plate, a partition is installed in the groove body formed among the side plate, the bottom plate and the main shell, a filler is contained on the partition, the bottom side of the main shell is connected to the water inlet of the water pump, the water outlet of the water pump is connected to the bottom end of the water supply pipe, the top end of the water supply pipe is connected to a water distribution pipe, a spray head is arranged at the bottom of the water distribution pipe, a cover body is installed on the main shell on both sides of the spray head, the interior of the main shell is connected with the cover body through an air inlet groove, and the cover body is connected to one end of the air inlet pipe.

[0006] The beneficial effect of the utility model is that under the suction of the exhaust fan, some impurities in the gas entering the main shell through the air inlet pipe can be dissolved in the water body sprayed by the sprinkler head, and the setting of the filler can effectively increase the contact area between the gas and the water body, thereby effectively reducing the cost and difficulty of subsequent gas separation.

[0007] In order to effectively increase the contact area between gas and water;

[0008] As a further improvement of the above technical solution: the number of the partitions is two, and the shapes of the fillers contained on the upper and lower partitions are respectively a rosette and a sphere.

[0009] The beneficial effect of this improvement is that the dust mixed in the gas is first filtered through the rosette that is not easily blocked, thereby preventing the spherical filler below from being blocked by dust, thereby effectively ensuring that the spherical filler generates more turbulence at the liquid-gas interface, increasing the reaction rate and ensuring the adsorption effect on the gas.

[0010] In order to allow the gas to pass smoothly through the baffle and bottom plate;

[0011] As a further improvement of the above technical solution: sieve holes are provided on both the partition plate and the bottom plate.

[0012] The beneficial effect of this improvement is that the gas can flow smoothly through the sieve holes.

[0013] In order to effectively ensure the washing effect of the device;

[0014] As a further improvement of the above technical solution: the water distribution pipe is composed of a plurality of pipe bodies horizontally arranged on the top of the main shell, and the number of the spray heads is multiple.

[0015] The beneficial effect of this improvement is that the water sprayed from multiple spray heads can evenly cover the filler, ensuring sufficient contact between the gas and the water, thereby achieving an effective purification and adsorption effect.

[0016] In order to conveniently replace water bodies;

[0017] As a further improvement of the above technical solution: a water storage chamber is formed inside the main shell below the bottom plate, and a drain valve is installed on the bottom side of the water storage chamber.

[0018] The beneficial effect of this improvement is that the operator can conveniently discharge the water in the water storage chamber after opening the drain valve, and quickly replenish water into the interior of the main shell through the air inlet pipe for replacement.

[0019] In order to effectively improve the convenience of using the device;

[0020] As a further improvement of the above technical solution: a power module and a controller are installed on the main shell, and the power module is arranged in a groove formed between the air guide plate and the side plate.

[0021] The beneficial effect of this improvement is that the power module can provide power for the device, so that the device is not restricted by cables and can be moved to a suitable place of use to work.

[0022] In order to effectively reduce the flow resistance of gas inside the main shell;

[0023] As a further improvement of the above technical solution: the air guide plate is obliquely arranged on the main shell, and one end of the air guide plate facing the exhaust fan is connected to the top of the main shell.

[0024] The beneficial effect of this improvement is that the air guide plate plays a guiding role, so that the air entering the water storage chamber flows along the air guide plate, effectively reducing the resistance of air flow.

[0025] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0027] Figure 2 This is a cross-sectional structural diagram of the utility model without fillers;

[0028] Figure 3 It is a schematic diagram of the structure of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the utility model without the cover body and the air inlet pipe;

[0030] In the figure: 1. main shell; 2. exhaust fan; 3. air guide plate; 4. side panel; 5. power module; 6. bottom plate; 61. sieve hole; 7. partition; 8. filler; 9. water storage chamber; 10. water pump; 11. water supply pipe; 12. water distribution pipe; 13. sprinkler head; 14. air inlet groove; 15. controller; 16. cover body; 17. air inlet pipe; 18. drain valve. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0032] Embodiment 1:

[0033] like Figure 1—4 shows: a gas overflow prevention device for gas extraction drilling in coal mines, comprising a main shell 1, an exhaust fan 2 is arranged on the top side of the main shell 1, an air guide plate 3 is arranged on the main shell 1 at the rear side of the exhaust fan 2, the bottom end of the air guide plate 3 is connected to a bottom plate 6, a side plate 4 is arranged on the bottom plate 6 at the rear side of the air guide plate 3, a partition plate 7 is installed in the groove body formed by the side plate 4, the bottom plate 6 and the main shell 1, a filler 8 is contained on the partition plate 7, the bottom side of the main shell 1 is connected to the water inlet of a water pump 10, the water outlet of the water pump 10 is connected to the bottom end of a water supply pipe 11, the top end of the water supply pipe 11 is connected to a water distribution pipe 12, and a spray head 13 is arranged at the bottom of the water distribution pipe 12, The main shell 1 on both sides of the spray head 13 is installed with a cover body 16, the interior of the main shell 1 is connected to the cover body 16 through the air inlet groove 14, and the cover body 16 is connected to one end of the air inlet pipe 17. Under the suction of the exhaust fan 2, some impurities in the gas entering the main shell 1 through the air inlet pipe 17 can be dissolved in the water body sprayed by the spray head 13. The setting of the filler 8 can effectively increase the contact area between the gas and the water body, thereby effectively reducing the cost and difficulty of subsequent gas separation. The number of the partitions 7 is two, and the shapes of the fillers 8 contained on the upper and lower partitions 7 are respectively a wreath and a sphere. The dust mixed in the gas is first filtered through the wreath that is not easy to be blocked, thereby avoiding the lower The square spherical filler is blocked by dust, thereby effectively ensuring that the spherical filler generates more turbulence at the liquid-gas interface, improving the reaction rate, and ensuring the adsorption effect on the gas. The partition 7 and the bottom plate 6 are both provided with sieve holes 61, and the gas can flow smoothly through the sieve holes 61. The water distribution pipe 12 is composed of a plurality of tubes horizontally arranged on the top of the main shell 1. The number of the spray heads 13 is multiple, and the water sprayed by the multiple spray heads 13 can be evenly covered on the filler 8 to ensure sufficient contact between the gas and the water, thereby achieving an effective purification and adsorption effect. A water storage chamber 9 is formed inside the main shell 1 below the bottom plate 6, and a drain valve 18 is installed on the bottom side of the water storage chamber 9. Operation After opening the drain valve 18, personnel can conveniently discharge the water in the water storage chamber 9, and quickly replenish water to the interior of the main shell 1 through the air intake pipe 17 for replacement. The main shell 1 is equipped with a power module 5 and a controller 15. The power module 5 is arranged in a groove formed between the air guide plate 3 and the side plate 4. The power module 5 can provide power for the device, so that the device is not restricted by cables and can be moved to a suitable place of use for work. The air guide plate 3 is tilted on the main shell 1, and the end of the air guide plate 3 facing the exhaust fan 2 is connected to the top of the main shell 1. The air guide plate 3 plays a guiding role, so that the air entering the water storage chamber 9 flows along the air guide plate 3, effectively reducing the resistance of air flow.

[0034] The working principle of the present technical solution is as follows: connect the slag discharge pipe to the air inlet pipe 17, start the exhaust fan 2 and the water pump 10, so that a negative pressure is formed inside the main shell 1, and then the gas dust and the like are sucked into the inside of the main shell 1 through the slag discharge pipe; when the water pump 10 is working, it sucks the water in the water storage chamber 9, so that the water passes through the water supply pipe 11 and the water distribution pipe 12 and then through the spray head 13 to spray onto the filler 8 below. In the process of dust, gas and other gases flowing downward through the filler 8, they are fully in contact with the water, and the dust therein is deposited in the water, and the hydrogen sulfide and carbon dioxide therein are dissolved in the water, thereby increasing the concentration of gas in the gas and reducing the cost and difficulty of subsequent gas separation; finally, the purified gas is extracted by the exhaust fan 2 through the sieve hole 61 on the bottom plate 6 and led to the subsequent gas storage or separation adsorption mechanism in the prior art.

[0035] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0036] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A gas overflow prevention device for coal mine gas extraction drilling, characterized in that: The invention comprises a main shell (1), wherein an exhaust fan (2) is arranged on the top side of the main shell (1), an air guide plate (3) is arranged on the main shell (1) at the rear side of the exhaust fan (2), the bottom end of the air guide plate (3) is connected to a bottom plate (6), a side plate (4) is arranged on the bottom plate (6) at the rear side of the air guide plate (3), a partition plate (7) is installed in a groove body formed between the side plate (4), the bottom plate (6) and the main shell (1), a filler (8) is contained on the partition plate (7), and the main shell (1) The bottom side of the water pump (10) is connected to the water inlet of the water pump (10), the water outlet of the water pump (10) is connected to the bottom end of the water supply pipe (11), the top end of the water supply pipe (11) is connected to a water distribution pipe (12), a spray head (13) is arranged at the bottom of the water distribution pipe (12), and a cover body (16) is installed on both sides of the main shell (1) of the spray head (13), the interior of the main shell (1) is connected to the cover body (16) through the air inlet groove (14), and the cover body (16) is connected to one end of the air inlet pipe (17).

2. A gas overflow prevention device for coal mine gas extraction drilling according to claim 1, characterized in that: The number of the partitions (7) is two, and the shapes of the fillers (8) contained on the upper and lower partitions (7) are respectively a rosette and a sphere.

3. The gas overflow prevention device for coal mine gas extraction drilling according to claim 1, characterized in that: The partition plate (7) and the bottom plate (6) are both provided with sieve holes (61).

4. The gas overflow prevention device for coal mine gas extraction drilling according to claim 1, characterized in that: The water distribution pipe (12) is composed of a plurality of pipe bodies horizontally arranged on the top of the main shell (1), and the number of the spray heads (13) is multiple.

5. The gas overflow prevention device for coal mine gas extraction drilling according to claim 1, characterized in that: A water storage chamber (9) is formed inside the main housing (1) below the bottom plate (6), and a drain valve (18) is installed on the bottom side of the water storage chamber (9).

6. A gas overflow prevention device for coal mine gas extraction drilling according to claim 1, characterized in that: A power module (5) and a controller (15) are installed on the main housing (1); the power module (5) is arranged in a slot formed between the air guide plate (3) and the side plate (4).

7. A gas overflow prevention device for coal mine gas extraction drilling according to claim 1, characterized in that: The air guide plate (3) is arranged obliquely on the main housing (1), and one end of the air guide plate (3) facing the exhaust fan (2) is connected to the top of the main housing (1).

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