CN204738769U - Dust collector is prevented spouting in drilling in pit - Google Patents
Dust collector is prevented spouting in drilling in pit Download PDFInfo
- Publication number
- CN204738769U CN204738769U CN201520486245.XU CN201520486245U CN204738769U CN 204738769 U CN204738769 U CN 204738769U CN 201520486245 U CN201520486245 U CN 201520486245U CN 204738769 U CN204738769 U CN 204738769U
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- CN
- China
- Prior art keywords
- gas separator
- coal gas
- blowout preventer
- blowout
- anger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000000428 dust Substances 0.000 title claims abstract description 37
- 238000005553 drilling Methods 0.000 title claims abstract description 29
- 239000003034 coal gas Substances 0.000 claims abstract description 71
- 238000000605 extraction Methods 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims description 32
- 239000007924 injection Substances 0.000 claims description 32
- 230000002265 prevention Effects 0.000 claims description 32
- 238000005086 pumping Methods 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 7
- 230000006698 induction Effects 0.000 abstract 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000002817 coal dust Substances 0.000 description 16
- 239000003245 coal Substances 0.000 description 12
- 239000007921 spray Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002245 particle Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001914 calming effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides a dust collector is prevented spouting in drilling in pit. The utility model discloses dust collector is prevented spouting in drilling in pit includes: blowout preventer, wet -type are calmed the anger to draw and are penetrated dust remover and coal gas separator, coal gas separator include: coal gas separator body and setting are at this internal filter of coal gas separator, be equipped with induction port and gas outlet respectively on the outer wall of the coal gas separator body of filter both sides, drilling is arranged in to the one end of guard aperture pipe, and the other end is connected with the opening on the blowout preventer body outer wall, it fixes on the outer wall of the blowout preventer body relative with the opening to prevent spouting the baffle, the top of blowout preventer body is equipped with takes out the extraction mouth, and the wet -type is calmed the anger and is drawn the induction port of penetrating the dust remover and adopt the exit linkage with taking out, and the wet -type is calmed the anger to draw and is penetrated taking out of dust remover and adopt and mouthful be connected with coal gas separator's induction port, coal gas separator's gas outlet and gas drainage union coupling. The utility model discloses can prevent the orifice of driling, eliminate the dust, separation gas and buggy.
Description
Technical field
The utility model relates to coal mine down-hole drilling technical field, particularly relates to a kind of down-hole drilling blowout prevention dust arrester.
Background technology
In coal mine down-hole drilling work progress, if gas bearing capacity is comparatively large in the coal seam of construction, pressure is higher, very likely causes spray orifice, if do not take corresponding measure, gas exceeding limit in tunnel may be caused.
In prior art, boring mainly contains wet method boring and dry method is holed two kinds of modes, if adopt wet method boring dust easily to precipitate and even boring blocked in boring, and if ponding in hole wall the passage that gas sprays blocked easily cause spray orifice accident to occur; And Dust Capacity is comparatively large when adopting dry method to hole, and easily there is gas explosion.
Therefore, how can realize the object of blowout prevention dedusting when holing, this is the problem needing solution in this area badly simultaneously.
Utility model content
The utility model provides a kind of down-hole drilling blowout prevention dust arrester, the object of blowout prevention dedusting when achieving boring.
The utility model embodiment provides a kind of down-hole drilling blowout prevention dust arrester, comprising:
Blowout hookup, wet type are calmed the anger injection duster and coal gas separator;
Wherein, described blowout hookup comprises: guard aperture pipe, blowout preventer body, blowout prevention baffle plate;
Described coal gas separator comprises: coal gas separator body and be arranged on the intrinsic strainer of described coal gas separator; The outer wall of the described coal gas separator body of described strainer both sides is respectively equipped with air entry and gas outlet;
Wherein, one end of described guard aperture pipe is placed in boring, and the other end is connected with the opening on described blowout preventer body outer wall; Described blowout prevention baffle plate is fixed on the outer wall of the described blowout preventer body relative with described opening, for described blowout preventer body and rig being fixed;
The top of described blowout preventer body is provided with extraction outlet, and the calm the anger air entry of injection duster of described wet type exports with described extraction and is connected, and the calm the anger extraction mouth of injection duster of described wet type is connected with the air entry of described coal gas separator; The gas outlet of described coal gas separator is connected with gas pumping pipe.
Alternatively, the bottom of described blowout preventer body is provided with slag notch, and described slag notch is connected with scalable high-intensity connecting device, for being discharged by the residue in described blowout preventer body.
Alternatively, the other end of described guard aperture pipe is connected with the opening on described blowout preventer body outer wall by connecting clamp.
Alternatively, described strainer is screen pack.
Alternatively, the bottom surface of described screen pack and described coal gas separator body be arranged in parallel;
Described air entry is arranged on the bottom of the sidewall of described coal gas separator body, and described gas outlet is arranged on the top of the sidewall of described coal gas separator body, and described air entry and described gas outlet are positioned at the both sides of described screen pack.
Alternatively, described wet type is calmed the anger on injection duster and is also provided with outlet opening, and described outlet opening is connected with scalable high-intensity connecting device.
Alternatively, the outer wall of described coal gas separator body bottom portion is also provided with outfall and slag-drip opening.
Alternatively, described blowout preventer body is Multi-ported device part.
The down-hole drilling blowout prevention dust arrester that the utility model provides, by blowout hookup, the dense gas of height sprayed in boring is collected in blowout hookup, can prevent boring spray orifice from hurting sb.'s feelings, and the dust of the interior discharge of injection duster elimination boring of being calmed the anger by wet type, and by dense for the height in blowout hookup gas and remaining coal dust suction coal gas separator, coal gas separator can be separated the methane gas extracted out from boring and coal dust, in gas suction gas pumping pipe, coal dust is then stayed in coal gas separator, both the object preventing boring spray orifice had been reached, dust can be eliminated again, the methane gas entering coal gas separator can also be separated further with coal dust.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the utility model down-hole drilling blowout prevention dust arrester one embodiment;
Fig. 2 is the blowout hookup structural representation of the utility model down-hole drilling blowout prevention dust arrester one embodiment;
Fig. 3 is the coal gas separator structural representation of the utility model down-hole drilling blowout prevention dust arrester one embodiment;
Fig. 4 is the deduster structural representation of the utility model down-hole drilling blowout prevention dust arrester one embodiment.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model, technical scheme in the utility model is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of the utility model down-hole drilling blowout prevention dust arrester one embodiment, and as shown in Figure 1, the down-hole drilling blowout prevention dust arrester of the present embodiment can comprise:
Blowout hookup 10, wet type are calmed the anger injection duster 20 and coal gas separator 30;
Wherein, described blowout hookup 10 comprises: guard aperture pipe 1, blowout preventer body 2, blowout prevention baffle plate 3;
Described coal gas separator 30 comprises: coal gas separator body 4 and the strainer 5 be arranged in described coal gas separator body 4; The outer wall of the described coal gas separator body 4 of described strainer 5 both sides is respectively equipped with air entry 6 and gas outlet 7;
Wherein, one end of described guard aperture pipe 1 is placed in boring, and the other end is connected with the opening on described blowout preventer body 2 outer wall; Described blowout prevention baffle plate 3 is fixed on the outer wall of the described blowout preventer body 2 relative with described opening, for being fixed with rig by described blowout preventer body 2;
The top of described blowout preventer body 2 is provided with extraction outlet 8, and the calm the anger air entry 9 of injection duster 20 of described wet type exports 8 with described extraction and is connected, and the calm the anger extraction mouth 11 of injection duster 20 of described wet type is connected with the air entry 6 of described coal gas separator; The gas outlet 7 of described coal gas separator 30 is connected with gas pumping pipe.
Specifically, one end of the guard aperture pipe 1 of blowout hookup 10 is placed in boring, and the other end is connected with the opening on blowout preventer body 2 outer wall, and as shown in Figure 1, on the left of blowout preventer body 2, outer wall is provided with opening and is connected with guard aperture pipe 1; The blowout prevention baffle plate 3 of blowout hookup 10 is fixed on the outer wall relative with opening, for blowout preventer body 2 and rig front clamp device being fixed; The top of blowout preventer body 2 is provided with extraction outlet 8, is connected with the calm the anger air entry 9 of injection duster 20 of described wet type; The calm the anger extraction mouth of injection duster 20 of described wet type is connected to the air entry 6 of described coal gas separator; The gas outlet 7 of described coal gas separator 30 is connected with gas pumping pipe; Strainer 5 is provided with in coal gas separator body 4, the outer wall of the coal gas separator body 4 of strainer 5 both sides is respectively equipped with air entry 6 and gas outlet 7, air entry 6 and gas outlet 7 being arranged on strainer 5 both sides is to make the gas that enters from air entry 6 and coal dust after metre filter, by gas from gas outlet 7 suction gas pumping pipe.
The Main Function of blowout hookup 10 prevents boring spray orifice from hurting sb.'s feelings, and the dense gas of height of ejection in boring is collected in blowout hookup 10; Wherein, guard aperture pipe 1 plays a protective role to boring, the space sealing in boring can also be got up.
Wet type calms the anger injection duster 20 for existing deduster, and as KCS-32Y type mine wet-type is calmed the anger injection duster, Main Function eliminates the dust of discharging in boring, and by dense for the height in blowout hookup 10 gas and coal dust suction coal gas separator 30.
Coal gas separator 30 is body structure, and Main Function is that the gas extracted out from boring and coal dust are separated, and gas and coal dust are separated, and by gas suction gas pumping pipe, coal dust is then stayed in coal gas separator 30 especially by strainer.
Wherein, blowout hookup connects wet types by 2.5 inch extraction flexible pipes and to calm the anger injection duster 20, and wet type injection duster 20 of calming the anger connects coal gas separators by 2.5 inch extraction flexible pipes, and coal gas separator 30 connects gas pumping pipes by 2.5 inch extraction flexible pipes.Connect and note matters, during connection, joint must use special connecting clamp to fasten.The 2.5 inch extraction flexible pipes connected must hang up, must not be sagging.
The utility model blowout prevention dust arrester is installed once, can reuse, and only often need clear up deduster, coal gas separator and connecting hose.
The use procedure of the utility model embodiment down-hole drilling blowout prevention dust arrester is as follows: during drill hole of drilling machine, gas can from ejection in boring, but also be attended by pulverized coal particle and water, gas, pulverized coal particle and water can enter in blowout preventer body 2 by the guard aperture pipe being placed in boring, now have part pulverized coal particle and water is stayed in blowout preventer body, because wet type is calmed the anger the high negative pressure effect of injection duster, gas and remaining pulverized coal particle and water can be entered wet type by extraction flexible pipe to be calmed the anger injection duster by the calm the anger air entry 9 of injection duster 20 of wet type from the extraction outlet 8 of blowout hookup 10, in wet type calms the anger injection duster 20, dedusting is carried out to pulverized coal particle, now have most of pulverized coal particle and water to stay wet type and calm the anger in injection duster 20, but also may have residual pulverized coal particle, under the suction function of gas drainage system, gas and remaining pulverized coal particle and water enter coal gas separator by extraction flexible pipe by the air entry 6 of coal gas separator 30 by the calm the anger extraction mouth 11 of injection duster 20 of wet type, after strainer, gas can enter the gas pumping pipe of gas drainage system through the gas outlet 7 of coal gas separator, pulverized coal particle and water fall the bottom of coal gas separator.
The residue that above-mentioned blowout hookup, wet type are calmed the anger in injection duster and coal gas separator can be discharged by arranging slag-drip opening respectively.
The down-hole drilling blowout prevention dust arrester that the present embodiment provides, by blowout hookup, the dense gas of height sprayed in boring is collected in blowout hookup, can prevent boring spray orifice from hurting sb.'s feelings, and the dust of the interior discharge of injection duster elimination boring of being calmed the anger by wet type, and by dense for the height in blowout hookup gas and remaining coal dust suction coal gas separator, coal gas separator can be separated the methane gas extracted out from boring and coal dust, in gas suction gas pumping pipe, coal dust is then stayed in coal gas separator, both the object preventing boring spray orifice had been reached, dust can be eliminated again, the methane gas entering coal gas separator can also be separated further with coal dust.
Adopt several specific embodiment below, the technical scheme of Fig. 1 shown device embodiment is described in detail.
Fig. 2 is the blowout hookup structural representation of the utility model down-hole drilling blowout prevention dust arrester one embodiment, as shown in Figure 2, the blowout hookup of the present embodiment is on the basis of Fig. 1 shown device structure, further, the bottom of described blowout preventer body 2 is provided with slag notch 12, described slag notch 12 is connected with scalable high-intensity connecting device 13, for being discharged by the residue in described blowout preventer body 2.
Specifically, scalable high-intensity connecting device 13 can be connected to slag-draining device, for being discharged by the residue in described blowout preventer body 2.
Scalable high-intensity connecting device, due to its scalability, goes for the tunnel of different height.
Alternatively, the other end of described guard aperture pipe 1 is connected with the opening on described blowout preventer body 2 outer wall by connecting clamp 14.
Specifically, can use connecting clamp 14 that guard aperture pipe 1 and blowout preventer body are connected as one in the present embodiment, make blowout hookup more firm.
In the utility model, guard aperture pipe 1 can be the seamless steel pipe of Φ 108mm.
Alternatively, described blowout preventer body 2 is Multi-ported device part.
Specifically, as shown in Figure 2, the left side opening of blowout preventer body 2 is connected with guard aperture pipe, the right side of blowout preventer body 2 has opening by blowout prevention baffle plate, blowout preventer body 2 and rig are fixed, the top of blowout preventer body 2 is provided with extraction outlet, and bottom is provided with slag notch, and therefore blowout preventer body 2 is Multi-ported device part.
Fig. 3 is the coal gas separator structural representation of the utility model down-hole drilling blowout prevention dust arrester one embodiment, and as shown in Figure 3, the coal gas separator of the present embodiment is on the basis of Fig. 1 shown device structure, and further, described strainer 5 is screen pack.
Alternatively, the bottom surface of described screen pack and described coal gas separator body 4 be arranged in parallel;
Described air entry 6 is arranged on the bottom of the sidewall of described coal gas separator body 4, and described gas outlet 7 is arranged on the top of the sidewall of described coal gas separator body 4, and described air entry 6 and described gas outlet 7 are positioned at the both sides of described screen pack.
Specifically, screen pack can be adopted in the utility model embodiment as strainer, and the gas to transmit in order to injection duster of wet type can being calmed the anger is separated fully with coal dust, therefore screen pack is arranged between air entry 6 and gas outlet 7, as shown in Figure 3, air entry 6 is arranged on the bottom of the left side outer wall of coal gas separator body 4, and gas outlet 7 is arranged on the top of the outer right wall of coal gas separator body 4.
Alternatively, the outer wall bottom described coal gas separator body 4 is also provided with outfall 15 and slag-drip opening 16.
Specifically, as shown in Figure 3, the left side outer wall bottom coal gas separator body 4 is also provided with outfall 15, discharge for the liquid of coming with gas and coal dust one Bulk transport in injection duster of wet type being calmed the anger, this liquid is such as the sewage after dedusting.
As shown in Figure 3, the outer wall bottom coal gas separator body 4 is also provided with slag-drip opening 16, after Long-Time Service, in coal gas separator body, can coal dust be accumulated, need regularly to clear up.
Fig. 4 is the deduster structural representation of the utility model down-hole drilling blowout prevention dust arrester one embodiment, as shown in Figure 4, the device of the present embodiment is on the basis of Fig. 1 shown device structure, further, described wet type is calmed the anger on injection duster 20 and is also provided with outlet opening 17, and described outlet opening 17 is connected with scalable high-intensity connecting device 18.
Specifically, outlet opening 17 is for discharging the drilling cuttings after deduster dedusting and sewage.
In the utility model, wet type injection duster of calming the anger utilizes supply pressure wind to form high negative pressure to reach object to dust dedusting in extraction borehole hole, need supply pressure wind>=0.2MPa, supply hydraulic pressure wind>=0.3MPa, and gas is maximum reaches 32m in process
3/ min.
As shown in Figure 4, wet type is calmed the anger on injection duster and is also provided with compressed air inlet port 19 and press water import 21.
When the utility model device uses, open wet type and to calm the anger air intake, the water valve of injection duster, open gas drainage system, after gas drainage system negative pressure is normally opened, blowout prevention dust arrester just can normally work simultaneously.Should be noted during use, joint must use iron wire or professional clamp card firm.Before opening deduster, must first heat water valve.
The down-hole drilling blowout prevention dust arrester that the utility model provides, the drilling cuttings sprayed in hole during boring spray orifice and foreign material, be collected in the blowout hookup in aperture, prevent spray to hinder constructor, safer; And the dust pollution produced during effectively controlling drilling construction after using deduster; Can also transfinite by gas prevention; This blowout prevention dust arrester is installed and is connected simply, easily and fast, can reuse after once mounting; Cost is low, and processing and fabricating is simple; Applied widely, all kinds of boring can be used in as layer-through drilling, concordant boring etc.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (8)
1. a down-hole drilling blowout prevention dust arrester, is characterized in that, comprising:
Blowout hookup, wet type are calmed the anger injection duster and coal gas separator;
Wherein, described blowout hookup comprises: guard aperture pipe, blowout preventer body, blowout prevention baffle plate;
Described coal gas separator comprises: coal gas separator body and be arranged on the intrinsic strainer of described coal gas separator; The outer wall of the described coal gas separator body of described strainer both sides is respectively equipped with air entry and gas outlet;
Wherein, one end of described guard aperture pipe is placed in boring, and the other end is connected with the opening on described blowout preventer body outer wall; Described blowout prevention baffle plate is fixed on the outer wall of the described blowout preventer body relative with described opening, for described blowout preventer body and rig being fixed;
The top of described blowout preventer body is provided with extraction outlet, and the calm the anger air entry of injection duster of described wet type exports with described extraction and is connected, and the calm the anger extraction mouth of injection duster of described wet type is connected with the air entry of described coal gas separator; The gas outlet of described coal gas separator is connected with gas pumping pipe.
2. device according to claim 1, is characterized in that, the bottom of described blowout preventer body is provided with slag notch, and described slag notch is connected with scalable high-intensity connecting device, for being discharged by the residue in described blowout preventer body.
3. device according to claim 1 and 2, is characterized in that, the other end of described guard aperture pipe is connected with the opening on described blowout preventer body outer wall by connecting clamp.
4. device according to claim 1 and 2, is characterized in that, described strainer is screen pack.
5. device according to claim 4, is characterized in that, the bottom surface of described screen pack and described coal gas separator body be arranged in parallel;
Described air entry is arranged on the bottom of the sidewall of described coal gas separator body, and described gas outlet is arranged on the top of the sidewall of described coal gas separator body, and described air entry and described gas outlet are positioned at the both sides of described screen pack.
6. device according to claim 1 and 2, is characterized in that, described wet type is calmed the anger on injection duster and is also provided with outlet opening, and described outlet opening is connected with scalable high-intensity connecting device.
7. device according to claim 1 and 2, is characterized in that, the outer wall of described coal gas separator body bottom portion is also provided with outfall and slag-drip opening.
8. device according to claim 1 and 2, is characterized in that, described blowout preventer body is Multi-ported device part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520486245.XU CN204738769U (en) | 2015-07-07 | 2015-07-07 | Dust collector is prevented spouting in drilling in pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520486245.XU CN204738769U (en) | 2015-07-07 | 2015-07-07 | Dust collector is prevented spouting in drilling in pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204738769U true CN204738769U (en) | 2015-11-04 |
Family
ID=54420510
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520486245.XU Expired - Fee Related CN204738769U (en) | 2015-07-07 | 2015-07-07 | Dust collector is prevented spouting in drilling in pit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204738769U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929549A (en) * | 2015-07-07 | 2015-09-23 | 淮南矿业(集团)有限责任公司 | Blowout preventing and dedusting device for underground drilling |
| CN106812483A (en) * | 2017-03-21 | 2017-06-09 | 徐文娟 | Coal mine drilling geomantic omen jet extraction dust arrester |
| CN109236217A (en) * | 2018-11-28 | 2019-01-18 | 高彦军 | Coal mine drill orifice dust trapping device |
-
2015
- 2015-07-07 CN CN201520486245.XU patent/CN204738769U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929549A (en) * | 2015-07-07 | 2015-09-23 | 淮南矿业(集团)有限责任公司 | Blowout preventing and dedusting device for underground drilling |
| CN106812483A (en) * | 2017-03-21 | 2017-06-09 | 徐文娟 | Coal mine drilling geomantic omen jet extraction dust arrester |
| CN109236217A (en) * | 2018-11-28 | 2019-01-18 | 高彦军 | Coal mine drill orifice dust trapping device |
| CN109236217B (en) * | 2018-11-28 | 2020-09-01 | 高彦军 | Coal mine drilling orifice dust catching device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 |