CN215672327U - Prevention and control orifice device for gas pre-drainage drilling of construction coal mine - Google Patents
Prevention and control orifice device for gas pre-drainage drilling of construction coal mine Download PDFInfo
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- CN215672327U CN215672327U CN202121439499.8U CN202121439499U CN215672327U CN 215672327 U CN215672327 U CN 215672327U CN 202121439499 U CN202121439499 U CN 202121439499U CN 215672327 U CN215672327 U CN 215672327U
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- gas
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- drill rod
- collecting box
- drill
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Abstract
The utility model discloses a device for preventing and controlling spray orifices of gas pre-drainage drill holes in construction coal mines, which comprises a drill rod and a mining drill connected with the drill rod, and further comprises an accommodating barrel, wherein the accommodating barrel is sleeved on the drill rod, one end of the accommodating barrel is provided with a barrel group corresponding to the drill rod, the barrel group is provided with a valve corresponding to a coal seam orifice pipe, and the other end of the accommodating barrel is provided with a sealing component corresponding to the drill rod; the lower lateral wall of the containing barrel is connected with a rock powder collecting box in a conduction mode, the upper lateral wall of the containing barrel is connected with a gas collecting box through a hose, and under the condition that the drill rod is started, rock powder and gas come out along the coal seam hole pipe and are guided into the containing barrel, the rock powder collecting box and the gas collecting box through the sleeve group to be used for guiding out the rock powder and the gas in the containing barrel. The utility model reduces the occurrence of safety accidents to a certain extent, also reduces the shutdown and the personnel and vehicle interior caused by the safety alarm, and improves the operation efficiency on the premise of ensuring the safety coefficient.
Description
Technical Field
The utility model belongs to the technical field of auxiliary equipment for gas pre-drainage drilling of dry coal mines, and particularly relates to a spray hole prevention and control device for gas pre-drainage drilling of a construction coal mine.
Background
Mine gas is one of the most serious hazards in coal mine safety production, gas explosion accidents account for about 70% of coal mine serious accidents, particularly coal and gas outburst accidents, a large amount of coal and gas are instantly discharged, the accident hazard is large, the prevention difficulty is large, serious safety production accidents are easily caused, in order to implement gas control responsibility, a gas zero overrun is taken as a fighting target to stop the gas accidents, a gas drainage system is required to be established in a high gas mine in China in order to reduce the gas content of the coal seam, before coal mine exploitation, coal seam drainage is firstly carried out, the gas emission amount in coal mine exploitation is reduced, a drilling machine is utilized to construct a gas drainage drill hole underground, gas sometimes suddenly flows out from the drill hole in the construction process, and the gas in mine air flow exceeds the limit, once the gas is out of limit, people must be removed by power failure, and comprehensively, the gas is out of limit in wind current caused by gas emission in the current gas drainage drilling construction process, so that the construction efficiency is influenced, and certain potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a spray hole prevention and control device for constructing a gas pre-drainage drill hole of a coal mine, and solves the problems that the construction efficiency is influenced and certain potential safety hazards exist due to the fact that gas in air flow is out of limit in the current gas drainage drill hole construction process.
The technical scheme adopted by the utility model is that,
a device for preventing and controlling spray holes of gas pre-drainage drill holes in construction coal mines comprises a drill rod, a mining drill connected with the drill rod and an accommodating barrel, wherein the accommodating barrel is sleeved on the drill rod; the lower lateral wall of the containing barrel is connected with a rock powder collecting box in a conduction mode, the upper lateral wall of the containing barrel is connected with a gas collecting box through a hose, and under the condition that the drill rod is started, rock powder and gas come out along the coal seam hole pipe and are guided into the containing barrel, the rock powder collecting box and the gas collecting box through the sleeve group to be used for guiding out the rock powder and the gas in the containing barrel.
The present invention is also characterized in that,
the holding cylinder is of a steel cylinder structure, and the drill rod penetrates through the holding cylinder along the axial direction.
The sleeve group comprises a first sleeve and a second sleeve, and the first sleeve and the second sleeve and the coal seam orifice pipe are connected through flanges.
The second sleeve is larger than the radial dimension of the first sleeve.
The valve is in an open state in the case of drilling and production of the drill pipe, and in a closed state in the case of drilling and production of the drill pipe.
The sealing assembly comprises a third sleeve, the third sleeve is connected with a drill rod flange, a sealing ring is arranged in the third sleeve corresponding to the accommodating barrel, and therefore the other end of the accommodating barrel can be sealed and corresponds to an opening of the drill rod.
The gas guide hole has been seted up to the last lateral wall of an accommodation section of thick bamboo, and the one side of gas collecting box is connected to the gas guide hole, the other end of hose, and the negative pressure is taken out to the opposite side turn-on connection of gas collecting box and is put the pipe, and the negative pressure is taken out and is put the pipe and go up to have seted up valve A corresponding gas collecting box.
The lower lateral wall of an accommodation barrel is provided with a rock powder guide outlet, one side of a rock powder collecting box is connected with one end of a second pipeline, the other end of the second pipeline is connected with the rock powder guide outlet, the other side of the rock powder collecting box is connected with a discharge pipe in a conduction mode, and the discharge pipe is provided with a valve B.
The utility model has the beneficial effects that: according to the orifice preventing and controlling device for the gas pre-drainage drill hole of the construction coal mine, the circulation collecting device is arranged on rock powder and gas of the mine, so that the occurrence of safety production accidents caused by instantaneous burst of a large amount of coal and gas is reduced to a certain extent, meanwhile, due to the arrangement, the situations that a large amount of personnel need to evacuate due to the fact that the gas exceeds the limit, power needs to be cut off during operation, and the whole mine operation efficiency is improved, and the orifice preventing and controlling device is high in practical significance.
Drawings
FIG. 1 is a schematic structural diagram of a device for preventing and controlling spray orifices for constructing a coal mine gas pre-drainage drill hole;
fig. 2 is a schematic structural diagram of a sealing ring in the orifice prevention and control device for constructing the coal mine gas pre-drainage drill hole.
In the figure, 1, a first flange plate, 2, a coal seam orifice pipe, 3, a valve, 4, a drill bit, 5, a second flange plate, 6, a drill rod, 7, a sealing ring, 8, a third flange plate, 9, a mining drilling machine, 10, a hose, 11, a second pipeline, 12, a gas collecting box, 13, a rock powder collecting box, 14, a valve A, 15, a valve B, 16, a negative pressure drainage pipe, 17, an air guide hole, 18, a containing cylinder, 19, a first sleeve, 20, a second sleeve, 21, a third sleeve, 22, a discharge pipe and 23, and a rock powder guide outlet.
Detailed Description
The utility model relates to a device for preventing and controlling spray holes of a gas pre-drainage drill hole of a construction coal mine, which is described in detail with reference to the accompanying drawings and the detailed implementation mode.
As shown in fig. 1 and 2, the device for preventing and controlling the spray holes of the gas pre-drainage drill hole of the construction coal mine comprises a drill rod 6 and a mining drill 9 connected with the drill rod 6, and is characterized by further comprising an accommodating cylinder 18, wherein the accommodating cylinder 18 is sleeved on the drill rod 6, one end of the accommodating cylinder 18 is provided with a sleeve group corresponding to the drill rod 6, the sleeve group is provided with a valve 3 corresponding to the coal seam orifice pipe 2, and the other end of the accommodating cylinder 18 is provided with a sealing assembly corresponding to the drill rod 6; the lower side wall of the containing barrel 18 is in conduction connection with a rock powder collecting box 13, the upper side wall of the containing barrel 18 is connected with a gas collecting box 12 through a hose 10, and under the condition that the drill rod 6 is started, rock powder and gas come out along a coal seam hole pipe and are guided into the containing barrel 18, the rock powder collecting box 13 and the gas collecting box 12 through the sleeve group to be used for guiding out the rock powder and the gas in the containing barrel 18.
Further, the accommodating cylinder 18 is of a steel cylinder structure, and the drill rod 6 axially penetrates through the accommodating cylinder 18.
Further, the sleeve group comprises a first sleeve 19 and a second sleeve 20, and flange connections are formed between the first sleeve 19 and the second sleeve 20 and between the second sleeve 20 and the coal seam orifice pipe 2.
Further, the second sleeve 20 is larger than the radial dimension of the first sleeve 19.
Further, in case of drilling and production on the drill rod 6, the valve 3 is in an open state, and in case of drilling and production on the drill rod 6, the valve 3 is in a closed state.
Further, the sealing assembly comprises a third sleeve 21, the third sleeve 21 is connected with the drill rod flange, and the third sleeve 21 is internally provided with a sealing ring 7 corresponding to the accommodating cylinder 18 so as to seal the opening of the accommodating cylinder 18 corresponding to the drill rod 6 at the other end.
Furthermore, the upper side wall of the accommodating cylinder 18 is provided with an air guide hole 17, one end of the hose 10 is connected with the air guide hole 17, the other end of the hose is connected with one side of the gas collecting box 12, the other side of the gas collecting box 12 is connected with a negative pressure drainage pipe 16 in a conduction manner, and the negative pressure drainage pipe 16 is provided with a valve a14 corresponding to the gas collecting box 12.
Further, a rock powder outlet 23 is formed in the lower side wall of the accommodating barrel 18, one side of the rock powder collecting box 13 is connected with one end of the second pipeline 11, the other end of the second pipeline 11 is connected with the rock powder outlet 23, the other side of the rock powder collecting box 13 is in conduction connection with a discharge pipe 22, and the discharge pipe is provided with a valve B15.
The working principle of the orifice prevention and control device for constructing the coal mine gas pre-drainage drill hole is as follows: the device is located first flange piece 1 of drill bit 4 front end and is connected with second flange piece 2 of gas drainage drill hole, the rear end of device is equipped with seal assembly, the drill bit 4 of device, drilling rod 6 passes from seal assembly, get into the coal seam through first flange piece 1 and creep into, the upper portion of device middle section holding cylinder 18 is equipped with air guide hole 17, the lower part is equipped with outlet 23, the height in air guide hole 17 and outlet 23 two holes is different, air guide hole 17 passes through hose 10 and connects gas collecting box 12, gas collecting box 12 connects the negative pressure drainage pipe-line system in the pit, valve A14 is normally open valve, outlet 23 passes through second pipeline 11 and connects rock dust collecting box 13, rock dust collecting box 13 is equipped with valve B15, the general condition is in the closed condition.
When gas is sprayed out from the drill hole of the coal seam orifice pipe 2, the gas enters the gas collection box 12 through the gas guide hole 17, and enters the underground negative pressure drainage pipeline from the gas collection box 12 through the pipeline; the sealing device is arranged at the penetrating position of the drill rod at the rear end of the device, the sprayed gas cannot enter underground airflow air, the gas in the airflow cannot be out of limit, the gas out-of-limit alarm cannot give an alarm, and power failure and people removal cannot be caused; rock powder in drilling construction enters the rock powder collecting box 13 through the outlet 23, the valve B15 is a normally closed valve, and the rock powder in the rock powder collecting box 13 can be regularly collected without influencing drilling construction.
The utility model relates to a hole spraying prevention and control device for gas pre-drainage drilling of a construction coal mine, which reasonably dredges and collects rock powder and gas, reduces the occurrence of safety accidents to a certain extent, also reduces the shutdown and personnel evacuation caused by safety alarm alarming, and improves the operation efficiency on the premise of ensuring the safety coefficient.
Claims (8)
1. The orifice prevention and control device for the construction of the coal mine gas pre-drainage drill hole comprises a drill rod (6) and a mine drill (9) connected with the drill rod (6), and is characterized by further comprising an accommodating cylinder (18), wherein the drill rod (6) is sleeved with the accommodating cylinder (18), one end of the accommodating cylinder (18) is provided with a sleeve group corresponding to the drill rod (6), the sleeve group is provided with a valve (3) corresponding to a coal seam orifice pipe (2), and the other end of the accommodating cylinder (18) is provided with a sealing assembly corresponding to the drill rod (6); the coal seam drilling device is characterized in that a rock powder collecting box (13) is connected to the lower side wall of the containing barrel (18) in a conduction mode, a gas collecting box (12) is connected to the upper side wall of the containing barrel (18) through a hose (10), under the condition that the drill rod (6) is started, rock powder and gas come out along a coal seam hole pipe and are guided into the containing barrel (18) through the sleeve group, and the rock powder collecting box (13) and the gas collecting box (12) are used for guiding out the rock powder and the gas in the containing barrel (18).
2. The device for preventing and controlling the spray holes in the gas pre-drainage drill hole of the construction coal mine according to claim 1, wherein the accommodating cylinder (18) is of a steel cylinder structure, and the drill rod (6) axially penetrates through the accommodating cylinder (18).
3. The device for preventing and controlling the spray holes for the construction of the coal mine gas pre-drainage drill hole is characterized in that the sleeve set comprises a first sleeve (19) and a second sleeve (20), and flange connections are formed between the first sleeve (19) and the second sleeve (20) and between the second sleeve (20) and the coal seam orifice pipe (2).
4. A hole injection prevention device for construction of a coal mine gas pre-drainage drill hole as claimed in claim 3, wherein the second sleeve (20) is larger than the radial dimension of the first sleeve (19).
5. The device for preventing and controlling the spray holes in the gas pre-drainage drill hole in the construction coal mine according to claim 1, characterized in that the valve (3) is in an open state under the condition that the drill rod (6) is drilled and mined, and the valve (3) is in a closed state under the condition that the drill rod (6) is not drilled and mined.
6. The device for preventing and controlling the spray holes in the gas pre-drainage drill hole in the construction coal mine according to claim 1, wherein the sealing assembly comprises a third sleeve (21), the third sleeve (21) is connected with a drill rod flange, and a sealing ring (7) is arranged in the third sleeve (21) corresponding to the accommodating cylinder (18) so as to seal the opening of the other end of the accommodating cylinder (18) corresponding to the drill rod (6).
7. The device for preventing and controlling the spray hole of the pre-drainage drill hole for the gas in the construction coal mine according to claim 1, wherein the upper side wall of the accommodating cylinder (18) is provided with a gas guide hole (17), one end of the hose (10) is connected with the gas guide hole (17), the other end of the hose is connected with one side of the gas collecting box (12), the other side of the gas collecting box (12) is in conduction connection with a negative pressure drainage pipe (16), and the negative pressure drainage pipe (16) is provided with a valve A (14) corresponding to the gas collecting box (12).
8. The device for preventing and controlling the spray hole of the gas pre-drainage drill hole in the construction coal mine according to claim 1, wherein a rock dust outlet (23) is formed in the lower side wall of the accommodating cylinder (18), one side of the rock dust collecting box (13) is connected with one end of the second pipeline (11), the other end of the second pipeline (11) is connected with the rock dust outlet (23), the other side of the rock dust collecting box (13) is in conduction connection with a discharge pipe (22), and the discharge pipe is provided with a valve B (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121439499.8U CN215672327U (en) | 2021-06-25 | 2021-06-25 | Prevention and control orifice device for gas pre-drainage drilling of construction coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121439499.8U CN215672327U (en) | 2021-06-25 | 2021-06-25 | Prevention and control orifice device for gas pre-drainage drilling of construction coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215672327U true CN215672327U (en) | 2022-01-28 |
Family
ID=79977332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121439499.8U Expired - Fee Related CN215672327U (en) | 2021-06-25 | 2021-06-25 | Prevention and control orifice device for gas pre-drainage drilling of construction coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215672327U (en) |
-
2021
- 2021-06-25 CN CN202121439499.8U patent/CN215672327U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |