CN111021971A - Dry type drilling coal dust pneumatic conveying and dust removing device for soft coal seam - Google Patents
Dry type drilling coal dust pneumatic conveying and dust removing device for soft coal seam Download PDFInfo
- Publication number
- CN111021971A CN111021971A CN202010110617.4A CN202010110617A CN111021971A CN 111021971 A CN111021971 A CN 111021971A CN 202010110617 A CN202010110617 A CN 202010110617A CN 111021971 A CN111021971 A CN 111021971A
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- dust
- conveying
- ejector
- coal
- side plate
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- 239000000428 dust Substances 0.000 title claims abstract description 84
- 239000003245 coal Substances 0.000 title claims abstract description 60
- 239000002817 coal dust Substances 0.000 title claims abstract description 34
- 238000005553 drilling Methods 0.000 title claims abstract description 34
- 238000012216 screening Methods 0.000 claims abstract description 30
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 239000003595 mist Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000003818 cinder Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a dry-type drilling coal dust pneumatic conveying and dust removing device for a soft coal seam, which comprises a rack, a discharging pipe groove, a water mist nozzle, a rubber conveying hose, an intersection pipe, a conveying ejector, a dust removing ejector, a screening conical hopper, a dust hood and a rubber dust collecting hose, wherein the rubber dust collecting hose is arranged in the rack; the device comprises a screening conical hopper, a conveying ejector, a dust removal ejector, a rubber conveying hose and a rubber conveying hose, wherein the conveying ejector is fixedly connected below the screening conical hopper, throats of the conveying ejector and the dust removal ejector are fixedly connected with two feed inlets of an intersection pipe respectively, and two ends of the rubber conveying hose are fixedly connected with a discharge pipe groove and a discharge outlet of the intersection pipe respectively; two ends of the rubber dust collection hose are respectively fixedly connected with the dust collection cover and the feeding pipe of the dust removal ejector; the device can remove dust when the dry drilling of soft coal seam, screens out the back with the coal cinder, utilizes the strength effect behind the compressed air lets in the sprayer to carry the mine car of packing into with coal dust granule and dander, has avoided the coal dust pollution, has eliminated the coal dust explosion hidden danger, has avoided the siltation of dander in the tunnel in the pit, has improved the work efficiency of dander clearance.
Description
Technical Field
The invention relates to the technical field of drilling of a soft coal seam in a coal mine, in particular to a dust removal and coal dust conveying device for dry drilling of the soft coal seam in the coal mine.
Background
In the process of drilling holes for gas extraction in a soft coal seam under a coal mine, a dry-type drilling process of mechanical slag removal or pneumatic slag removal is widely adopted, wherein the mechanical slag removal is realized by utilizing the rotation of a helical blade drill rod or a three-edged drill rod and the like during drilling, the pneumatic slag removal is realized by utilizing compressed air to be introduced into the bottom of the drill hole through an inner hole of the drill rod, and coal scraps generated by cutting coal rocks by a drill bit are discharged out of the holes along an annular gap between the drill rod and the hole wall. The dry drilling adopting mechanical slag removal or pneumatic slag removal can generate a large amount of coal dust in a drilling operation area, damage is caused to the respiratory system of an operator, and the health of the operator is influenced; meanwhile, the accumulated coal dust is easy to explode, and the safety production of the mine is seriously threatened; in addition, a large amount of coal dust is accumulated in a roadway after being discharged from a drill hole, great inconvenience is brought to the operation of drilling equipment in an underground drilling field, the standardized image of a mine is seriously influenced, special cleaning personnel need to be arranged for the coal mine to clean the accumulated coal dust regularly, the coal dust is loaded into a mine car by using a shovel, the labor intensity of cleaning work is high, the working environment is severe, and the labor cost of coal mine production is improved.
Disclosure of Invention
Aiming at the problems of the coal enterprises in the construction of gas extraction drilling in the soft coal seam, the invention provides a dry type drilling coal dust pneumatic conveying and dust removing device for the soft coal seam, which has a dust removing function and conveys coal dust particles and discharged coal dust into a mine car after screening out coal blocks.
The specific technical scheme is as follows: the dry-type drilling coal dust pneumatic conveying and dust removing device for the soft coal seam comprises a frame, a discharging pipe groove, a water mist nozzle, a rubber conveying hose, an intersection pipe, a conveying ejector, a dust removing ejector, a screening conical hopper, a dust collecting cover and a rubber dust collecting hose; wherein, the delivery injector consists of a nozzle, a throat pipe, a feed chute and an air source valve; the dust removal ejector consists of a nozzle, a throat pipe, a feeding pipe and an air source valve; the screening conical hopper consists of supporting legs, a connecting plate, a supporting leg beam, a front side plate, a left side plate, a right side plate, a rear side plate, a sieve plate and a coal guide chute; the dust collecting hood consists of a left side plate, a right side plate, a rear side plate, a top plate and a dust collecting pipe.
The screening conical funnel is internally welded and fixed with a screen plate which inclines downwards from front to back, and the diameter of a screen hole of the screen plate is equal to the minimum inner diameter of a throat pipe of the conveying ejector; a coal block discharge port is arranged on the rear side plate connected with the sieve plate, and a coal block guide chute is fixedly welded on the outer edge of the coal block discharge port; the middle position of a connecting plate of the screening conical funnel is provided with a funnel discharge port, and the peripheral edges of the funnel discharge port are respectively welded and fixed with the front side plate, the left side plate, the right side plate and the rear side plate; the four supporting legs are respectively welded and fixed at four corners of the connecting plate, and cross beams are respectively welded between the two supporting legs at the left side and between the two supporting legs at the right side.
A through drilling hole is formed in the rear side plate of the dust collection cover, and a dust collection pipe penetrates through and is welded in the middle of the top plate; the left side plate and the right side plate of the dust hood are respectively fixedly connected with the left side plate and the right side plate of the screening conical funnel by bolts.
The size of a feed port of the feed chute of the conveying ejector is the same as that of a funnel discharge port of a connecting plate of the screening conical funnel, and the feed chute of the conveying ejector is fixedly connected below the funnel discharge port of the connecting plate of the screening conical funnel by using bolts; the throat of the conveying ejector and the throat of the dust removal ejector are fixedly connected with the two feed inlets of the junction pipe through bolts respectively, and the throats of the conveying ejectors are fixedly connected to the cross beam through U-shaped clamps; the nozzle of the conveying ejector and the nozzle of the dust removal ejector are respectively and fixedly connected with an air source valve.
One end of the rubber conveying hose is fixedly connected with the discharge pipe groove by a hoop, and the other end of the rubber conveying hose is fixedly connected with a discharge hole of the junction pipe by the hoop; one end of the rubber dust collection hose is fixedly connected with the dust collection pipe of the dust collection cover through a hoop, and the other end of the rubber dust collection hose is fixedly connected with the feeding pipe of the dust removal ejector through the hoop.
The discharging pipe groove is fixedly arranged on the frame; the water mist nozzle penetrates through and is fixedly installed on a top plate of the discharging pipe groove opposite to the discharging opening of the discharging pipe groove.
The pneumatic conveying and dust removing device for the dry drilling coal dust in the soft coal seam has the beneficial effects that the pneumatic conveying and dust removing device for the dry drilling coal dust in the soft coal seam is simple in structure and convenient to use, dust can be removed in the drilling process, the coal dust is effectively prevented from being diffused, the physical health of operating personnel is guaranteed, the hidden danger of coal dust explosion is eliminated, and the safety of mine production is improved; after screening out the great coal cinder of particle size that will appear occasionally, utilize compressed air to let in the strength effect that the sprayer produced and carry the coal dust granule and the coal cinder and pack into the mine car, the transfer path flexible, the equipment step is nimble in narrow colliery underworkings, has avoided the siltation of coal cinder in underworkings, has reduced the quantity of coal cinder clearance staff, has reduced workman's intensity of labour, has improved the work efficiency of coal cinder clearance, has reached the purpose of the improvement effect of reducing the people.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of a screening cone of the present invention.
Fig. 3 is a bottom view of the sieving conical funnel of fig. 2.
Fig. 4 is a schematic view of the dust cage structure of the present invention.
Fig. 5 is a schematic diagram of the delivery injector configuration of the present invention.
FIG. 6 is a schematic view of the dust ejector of the present invention.
Detailed Description
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the pneumatic conveying and dust removing device for dry-type drilling coal dust in soft coal seam comprises a frame 1, a discharge pipe chute 2, a water mist nozzle 3, a rubber conveying hose 4, a junction pipe 5, a conveying ejector 7, a dust removing ejector 6, a screening cone-shaped funnel 8, a dust collecting cover 9 and a rubber dust collecting hose 10; wherein, the delivery injector 7 consists of a nozzle 72, a throat 74, a feeding groove 73 and a gas source valve 71; the dust removal ejector 6 consists of a nozzle 62, a throat 64, a feeding pipe 63 and a gas source valve 61; the screening conical funnel 8 consists of supporting legs 88, a connecting plate 87, a supporting leg cross beam 89, a front side plate 81, a left side plate 82, a right side plate 86, a rear side plate 83, a screen plate 80 and a coal guide chute 85; the dust collection cover 9 is composed of a left side plate 93, a right side plate 91, a rear side plate 92, a top plate 94 and a dust suction pipe 95.
The sieve plate 80 which inclines downwards from front to back is welded and fixed inside the sieving conical funnel 8, and the diameter of the sieve hole of the sieve plate 80 is equal to the minimum inner diameter of the throat pipe 74 of the conveying ejector 7; a coal block discharge port 84 is arranged on the rear side plate 83 connected with the sieve plate 80, and a coal block guide chute 85 is fixedly welded on the outer edge of the coal block discharge port 84; the middle position of a connecting plate 87 of the screening conical funnel 8 is provided with a funnel discharge port 79, and the peripheral edge of the funnel discharge port 79 is respectively welded and fixed with a front side plate 81, a left side plate 82, a right side plate 86 and a rear side plate 83; the four legs 88 are respectively welded and fixed at four corners of the connecting plate 87, and cross beams 89 are respectively welded between the two legs at the left side and between the two legs at the right side.
A through drilling hole 96 is formed in the rear side plate 92 of the dust collection cover 9, and a dust collection pipe 95 penetrates through and is welded in the middle of the top plate 94; the left side plate 93 and the right side plate 91 of the dust hood 9 are respectively fixedly connected with the left side plate 82 and the right side plate 86 of the screening cone-shaped funnel 8 by bolts.
The size of the feed inlet of the feed chute 73 of the conveying ejector 7 is the same as that of the funnel discharge port 79 of the connecting plate 87 of the screening conical funnel 8, and the feed chute 73 of the conveying ejector 7 is fixedly connected below the funnel discharge port 79 of the connecting plate 87 of the screening conical funnel 8 by bolts; the throat pipe 74 of the conveying ejector 7 and the throat pipe 64 of the dust removal ejector 6 are fixedly connected with two feed inlets of the junction pipe 5 through bolts respectively, and the throat pipe 74 of the conveying ejector 7 is fixedly connected to the cross beam 89 through a U-shaped clamp; the nozzle 72 of the delivery injector 7 and the nozzle 62 of the dust removal injector 6 are fixedly coupled with the gas supply valve 71 and the gas supply valve 61, respectively.
One end of the rubber conveying hose 4 is fixedly connected with the discharge pipe groove 2 through a hoop 13, and the other end of the rubber conveying hose is fixedly connected with a discharge hole of the junction pipe 5 through a hoop 14; one end of the rubber dust suction hose 10 is fixedly connected with a dust suction pipe 95 of the dust collection cover 9 by a clamp 15, and the other end is fixedly connected with a feeding pipe 63 of the dust removal ejector 6 by a clamp 16.
The discharge pipe chute 2 is fixedly arranged on the frame 1; the water mist nozzle 3 is fixedly arranged on a top plate 21 of the discharge pipe chute 2 opposite to the discharge opening of the discharge pipe chute 2 in a penetrating way.
When gas extraction drilling construction is carried out on a soft coal seam under a coal mine, the mine car 12 is pushed to the lower part of the rack 1, and the discharge port of the discharge pipe chute 2 is opposite to the mine car 12; placing the coal block box 11 below the coal block guide chute 85 of the screening conical hopper 8; meanwhile, the front side plate 81 of the screening conical hopper 8 is abutted against the coal wall, the drill rod 17 for drilling is penetrated through the through drilling hole 96 on the rear side plate 92 of the dust collection cover 9 from the rear, and then the drilling operation is started; during the drilling process of the drill rod 17, coal dust and coal dust discharged from the drill hole fall into the screening conical hopper 8 from a feed inlet on the front side of the dust collection cover 9, and coal blocks with larger particle sizes fall into the coal block box 11 through a coal block discharge hole 84 and a coal block guide groove 85 on a rear side plate 83 of the screening conical hopper 8 after being screened by the sieve plate 80; the coal dust with smaller particle size falls into the feed chute 73 of the delivery injector 7 through the sieve plate 80.
Opening an air source valve 71 and an air source valve 61, when compressed air enters a throat pipe 74 from a nozzle 72 of the conveying ejector 7, under the action of air force generated inside the conveying ejector 7, coal dust enters the throat pipe 74 from a feeding groove 73 and is conveyed to the junction pipe 5; meanwhile, when the compressed air enters the throat 64 from the nozzle 62 of the dust removing ejector 6, under the action of the air force generated inside the dust removing ejector 6, the coal dust accumulated in the dust collecting cover 9 enters the throat 64 through the dust suction pipe 95, the rubber dust suction hose 10 and the feeding pipe 63 of the dust removing ejector 6, and then is conveyed to the junction pipe 5; after the coal dust and the coal dust are collected in the intersection pipe 5, the coal dust and the coal dust are conveyed into the discharging pipe groove 2 through the rubber conveying hose 4, and after the water mist sprayed by the water mist nozzle 3 is further dedusted, the coal dust is adhered to the coal dust and falls into the mine car 12.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the scope of the present invention.
Claims (6)
1. The dry-type drilling coal dust pneumatic conveying and dust removing device for the soft coal seam is characterized in that: comprises a frame, a discharge pipe groove, a water mist nozzle, a rubber conveying hose, an intersection pipe, a conveying ejector, a dust removing ejector, a screening conical funnel, a dust collecting hood and a rubber dust collecting hose; wherein, the delivery injector consists of a nozzle, a throat pipe, a feed chute and an air source valve; the dust removal ejector consists of a nozzle, a throat pipe, a feeding pipe and an air source valve; the screening conical hopper consists of supporting legs, a connecting plate, a supporting leg beam, a front side plate, a left side plate, a right side plate, a rear side plate, a sieve plate and a coal guide chute; the dust collecting hood consists of a left side plate, a right side plate, a rear side plate, a top plate and a dust collecting pipe.
2. The pneumatic conveying and dust removing device for the dry-type drilling coal scraps in the soft coal seam as claimed in claim 1, wherein: the screening conical funnel is internally welded and fixed with a screen plate which inclines downwards from front to back, and the diameter of a screen hole of the screen plate is equal to the minimum inner diameter of a throat pipe of the conveying ejector; a coal block discharge port is arranged on the rear side plate connected with the sieve plate, and a coal block guide chute is fixedly welded on the outer edge of the coal block discharge port; the middle position of a connecting plate of the screening conical funnel is provided with a funnel discharge port, and the peripheral edges of the funnel discharge port are respectively welded and fixed with the front side plate, the left side plate, the right side plate and the rear side plate; the four supporting legs are respectively welded and fixed at four corners of the connecting plate, and cross beams are respectively welded between the two supporting legs at the left side and between the two supporting legs at the right side.
3. The pneumatic conveying and dust removing device for the dry-type drilling coal scraps in the soft coal seam as claimed in claim 1, wherein: a through drilling hole is formed in the rear side plate of the dust collection cover, and a dust collection pipe penetrates through and is welded in the middle of the top plate; the left side plate and the right side plate of the dust hood are respectively fixedly connected with the left side plate and the right side plate of the screening conical funnel by bolts.
4. The pneumatic conveying and dust removing device for the dry-type drilling coal scraps in the soft coal seam as claimed in claim 1, wherein: the size of a feed port of the feed chute of the conveying ejector is the same as that of a funnel discharge port of a connecting plate of the screening conical funnel, and the feed chute of the conveying ejector is fixedly connected below the funnel discharge port of the connecting plate of the screening conical funnel by using bolts; the throat of the conveying ejector and the throat of the dust removal ejector are fixedly connected with the two feed inlets of the junction pipe through bolts respectively, and the throats of the conveying ejectors are fixedly connected to the cross beam through U-shaped clamps; the nozzle of the conveying ejector and the nozzle of the dust removal ejector are respectively and fixedly connected with an air source valve.
5. The pneumatic conveying and dust removing device for the dry-type drilling coal scraps in the soft coal seam as claimed in claim 1, wherein: one end of the rubber conveying hose is fixedly connected with the discharge pipe groove by a hoop, and the other end of the rubber conveying hose is fixedly connected with a discharge hole of the junction pipe by the hoop; one end of the rubber dust collection hose is fixedly connected with the dust collection pipe of the dust collection cover through a hoop, and the other end of the rubber dust collection hose is fixedly connected with the feeding pipe of the dust removal ejector through the hoop.
6. The pneumatic conveying and dust removing device for the dry-type drilling coal scraps in the soft coal seam as claimed in claim 1, wherein: the discharging pipe groove is fixedly arranged on the frame; the water mist nozzle penetrates through and is fixedly installed on a top plate of the discharging pipe groove opposite to the discharging opening of the discharging pipe groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010110617.4A CN111021971A (en) | 2020-02-24 | 2020-02-24 | Dry type drilling coal dust pneumatic conveying and dust removing device for soft coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010110617.4A CN111021971A (en) | 2020-02-24 | 2020-02-24 | Dry type drilling coal dust pneumatic conveying and dust removing device for soft coal seam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111021971A true CN111021971A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010110617.4A Pending CN111021971A (en) | 2020-02-24 | 2020-02-24 | Dry type drilling coal dust pneumatic conveying and dust removing device for soft coal seam |
Country Status (1)
| Country | Link |
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| CN (1) | CN111021971A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594260A (en) * | 2020-06-03 | 2020-08-28 | 徐州工程学院 | Device for cleaning residual coal dust in hole sealing section of coal seam drilling |
-
2020
- 2020-02-24 CN CN202010110617.4A patent/CN111021971A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594260A (en) * | 2020-06-03 | 2020-08-28 | 徐州工程学院 | Device for cleaning residual coal dust in hole sealing section of coal seam drilling |
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