CN111691884A - Visual dust source isolation and purification device - Google Patents
Visual dust source isolation and purification device Download PDFInfo
- Publication number
- CN111691884A CN111691884A CN202010606893.XA CN202010606893A CN111691884A CN 111691884 A CN111691884 A CN 111691884A CN 202010606893 A CN202010606893 A CN 202010606893A CN 111691884 A CN111691884 A CN 111691884A
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- Prior art keywords
- dust
- folding
- curtain
- telescopic
- expansion piece
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- 239000000428 dust Substances 0.000 title claims abstract description 73
- 230000000007 visual effect Effects 0.000 title claims abstract description 16
- 238000000746 purification Methods 0.000 title claims abstract description 13
- 238000002955 isolation Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 32
- 230000008569 process Effects 0.000 abstract description 13
- 230000004630 mental health Effects 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 description 10
- 230000005641 tunneling Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 3
- 230000009323 psychological health Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
- E21C35/223—Equipment associated with mining machines for sucking dust-laden air from the cutting area, with or without cleaning of the air
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Prevention Of Fouling (AREA)
Abstract
The invention relates to a novel dust removal device for realizing dust control of a working face of a low-gas mine heading machine, in particular to a visual dust source isolation and purification device which comprises a longitudinal telescopic piece and a transverse telescopic piece, wherein one end of the longitudinal telescopic piece is connected with a mounting plate, the transverse telescopic piece is fixed on the mounting plate, a folding sealing curtain is arranged between the longitudinal telescopic piece and the mounting plate, a folding dust-blocking curtain is arranged between the transverse telescopic piece and the mounting plate, the mounting plate and the folding sealing curtain are driven to move up and down in the telescopic process of the longitudinal telescopic piece, the folding dust-blocking curtain is driven to move left and right in the telescopic process of the transverse telescopic piece, and the longitudinal telescopic piece and the transverse telescopic piece are controlled according to the thickness of a coal wall and the heading direction of heading, so that the gap between the folding sealing curtain and the coal wall can be kept, effectively avoid the dust to spread in driver's operation storehouse, effectively protected staff's physical and mental health.
Description
Technical Field
The invention relates to novel dust removal equipment for realizing dust control on a working surface of a low-gas mine heading machine, in particular to a visual dust source isolation and purification device.
Background
At present, the dust treatment equipment for head-on dust on a tunneling working face of a low-gas coal mine tunneling roadway only has single forward spraying, and because the working face has water quantity limitation, the arranged spraying heads are fewer and are difficult to completely cover a working area; however, the tunneling machine collapses in a large area instantly when working, the dust is thick and is difficult to be wetted by pressure spray water in a very short time, so that the collapsed dust and rocks form impact dust with a certain impact speed to be diffused backwards quickly, most of the dust rushes to a driver and a construction worker operation area at the rear end of the tunneling machine, and the physical and psychological health of the workers is seriously damaged.
In the existing dust source isolation device, a dust blocking curtain is fixed on a heading machine and used for preventing dust from escaping to a worker operation area, and the thickness of a coal wall is different in the collapse process of the coal wall in the heading process of the heading machine, so that the gap between the dust blocking curtain and the coal wall cannot be controlled, the phenomenon that the gap between the dust blocking curtain and the coal wall is too large easily occurs, dust diffuses everywhere, the physical and mental health of workers is damaged, the workers need to wear a dust mask to affect the operation at any moment, and the heading efficiency is reduced.
Disclosure of Invention
The invention aims to: aiming at the problems that in the prior art, the thickness of the coal wall is different in the coal wall collapse process of a coal mine development machine in the development process, the gap between the coal wall and a dust blocking curtain is changed, the dust blocking curtain can not effectively prevent dust from diffusing everywhere, and the dust enters an operation area of a worker, the visual dust source isolation and purification device is provided.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides a purification device is kept apart to visual dirt source, includes vertical extensible member and horizontal extensible member, vertical extensible member one end is connected with the mounting panel, horizontal extensible member is fixed on the mounting panel, vertical extensible member with be provided with the folding sealed curtain between the mounting panel, horizontal extensible member with be provided with folding fender dirt curtain between the mounting panel, the flexible in-process of vertical extensible member drives the mounting panel with the folding sealed curtain reciprocates, the flexible in-process of horizontal extensible member drives remove about the folding fender dirt curtain.
As a preferable scheme of the invention, the longitudinal telescopic part comprises a first telescopic part, a second telescopic part and a third telescopic part which are sequentially arranged in parallel, the transverse telescopic part comprises a fourth telescopic part and a fifth telescopic part which are fixed at two ends of a mounting plate, a transparent structure is fixed between the first telescopic part and the second telescopic part, the folding sealing curtain is arranged above the transparent structure, a partition plate is fixed between the second telescopic part and the third telescopic part, the folding sealing curtain is arranged above the partition plate, a mounting hole is formed in the partition plate, the up-and-down movement stability of the mounting plate is increased through a plurality of longitudinal telescopic parts, the installation of the transparent structure is convenient for workers to observe the situation during working, the partition plate is used for separating dust in front of the development machine from the working area of the workers behind, and the folding sealing curtain moves up and down along with the longitudinal telescopic part, so that the dust can be isolated while the gap above the coal wall is adapted.
As a preferable scheme of the invention, a distance sensor is arranged on the upper side of the mounting plate, a distance sensor is arranged at one end of the fourth telescopic member, which is far away from the fifth telescopic member, a distance sensor is arranged at one end of the fifth telescopic member, which is far away from the fourth telescopic member, the distance between the mounting plate, the fourth telescopic member and the fifth telescopic member and the coal wall is detected through the distance sensor, and the length of extension of the first telescopic member, the second telescopic member, the third telescopic member, the fourth telescopic member and the fifth telescopic member is adjusted to control the gap between the mounting plate and the coal wall and between the folding dust blocking curtain and the coal wall, so that dust is prevented from rushing out of the folding dust blocking curtain through the change of the thickness of the coal wall, and the influence of the dust on the physical and mental health of workers.
As a preferred scheme of the invention, a first hanging rod is arranged on the fourth telescopic piece, the fourth telescopic piece drives the first hanging rod to slide back and forth on the fourth telescopic piece, a second hanging rod is arranged on the fifth telescopic piece, the fifth telescopic piece drives the second hanging rod to slide back and forth on the fifth telescopic piece, the folding dust-blocking curtain is arranged on the first hanging rod and the second hanging rod, and the folding dust-blocking curtain is arranged on the first hanging rod and the second hanging rod, so that the folding dust-blocking curtain can conveniently move left and right, and the folding dust-blocking curtain can be prevented from being interfered with the fourth telescopic piece and the fifth telescopic piece to be clamped on the fourth telescopic piece and the fifth telescopic piece.
As a preferable scheme of the present invention, the mounting plate is a U-shaped groove, an opening of the U-shaped groove faces downward, and the longitudinal extensible member and the transverse extensible member are both disposed in the U-shaped groove, so as to facilitate mounting of the longitudinal extensible member and the transverse extensible member.
As a preferable scheme of the invention, the transparent structure is transparent glass, so that the strength of the transparent structure is increased, and workers can conveniently observe the front condition.
As a preferable scheme of the invention, the upper end of the mounting plate is provided with the brush, and the brush is always in contact with the upper coal wall in the tunneling process of the tunneling machine to scrape the dust forward and enter the front area, so that the influence of the dust entering the rear part on the physical and psychological health of workers is avoided.
As a preferable scheme of the invention, the mounting hole is connected with a dust removal fan, and the dust removal fan sucks dust for dust removal in the tunneling process of the heading machine, so that excessive dust accumulated in the front is reduced.
As a preferable scheme of the invention, the longitudinal expansion piece and the transverse expansion piece are both oil cylinders.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. install visual dust source purifier on the fuselage of entry driving machine, make the head with the entry driving machine and driver operation storehouse separately, when carrying out the tunnelling operation, control longitudinal extension piece is flexible, ensure that folding sealing curtain and folding fender dirt curtain can block the dust in longitudinal direction, control horizontal extension piece is flexible, ensure that folding fender dirt curtain can block the dust in horizontal, in the tunnelling process, according to the thickness of coal wall and the tunnelling direction of tunnelling and control longitudinal extension piece and horizontal extension piece, make folding sealing curtain can keep with the clearance of coal wall, effectively avoid the dust to spread in the driver operation storehouse, effectively protected staff's physical and mental health.
Drawings
FIG. 1 is a schematic view of a hidden portion of a mounting plate according to the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the present invention showing the construction of the folding dust curtain;
FIG. 4 is a schematic structural view of the connection of the mounting plate, the transverse expansion member, the first hanging rod and the second hanging rod;
FIG. 5 is a schematic view of the structure of the present invention mounted on a heading machine;
the labels in the figure are: 1-longitudinal telescopic part, 101-first telescopic part, 102-second telescopic part, 103-third telescopic part, 2-transverse telescopic part, 201-fourth telescopic part, 202-fifth telescopic part, 3-mounting plate, 4-folding sealing curtain, 5-folding dust-blocking curtain, 6-transparent structure, 7-partition plate, 8-mounting hole, 9-distance sensor, 10-first hanging rod, 11-second hanging rod, 12-brush, 13-dust-removing fan, 14-cockpit, 15-coal wall and 16-development machine.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-4, a purification device is kept apart to visual dirt source, including vertical extensible member 1 and horizontal extensible member 2, vertical extensible member 1 one end is connected with mounting panel 3, horizontal extensible member 2 is fixed on the mounting panel 3, vertical extensible member 1 with be provided with folding sealed curtain 4 between the mounting panel 3, horizontal extensible member 2 with be provided with folding dust blocking curtain 5 between the mounting panel 3, vertical extensible member 1 flexible in-process drives mounting panel 3 with folding sealed curtain 5 reciprocates, horizontal extensible member 2 flexible in-process drives about folding dust blocking curtain 2. In this embodiment, the foldable sealing curtain 4 and the foldable dust-blocking curtain 5 are similar to the household curtain, the edge of the foldable sealing curtain 4 is sealed with the part connected with the first telescopic member 101 and the second telescopic member 102, the height of the foldable dust-blocking curtain 5 is greater than the maximum height of the coal wall 15, and when the height of the coal wall 15 is smaller, the part of the foldable dust-blocking curtain 5 is supported on the ground to travel.
As shown in fig. 1-3, the longitudinal extensible member 1 includes a first extensible member 101, a second extensible member 102 and a third extensible member 103 which are sequentially arranged in parallel, the transverse extensible member 2 includes a fourth extensible member 201 and a fifth extensible member 202 which are fixed at two ends of the mounting plate 3, a transparent structure 6 is fixed between the first extensible member 101 and the second extensible member 102, the folding sealing curtain 4 is arranged above the transparent structure 6, a partition 7 is fixed between the second extensible member 102 and the third extensible member 103, the folding sealing curtain 4 is arranged above the partition 7, the partition 7 is provided with a mounting hole 8, the up-and-down movement stability of the mounting plate 3 is increased by the plurality of longitudinal extensible members 1, the installation of the transparent structure 6 is convenient for workers to observe the situation during working, and the partition 7 is used for separating the dust in front of the heading machine from the working area of the workers behind, the folding sealing curtain 4 moves up and down along with the longitudinal telescopic piece 1, so that the dust can be isolated while the gap above the coal wall is adapted.
As shown in fig. 2 and 3, a distance sensor 9 is arranged on the upper side of the mounting plate 3, a distance sensor 9 is arranged at one end of the fourth telescopic member 201 far away from the fifth telescopic member 202, a distance sensor 9 is arranged at one end of the fifth telescopic member 202 far away from the fourth telescopic member 201, the distance between the mounting plate 3, the fourth telescopic member 201 and the fifth telescopic member 202 and the coal wall is detected by the distance sensor 9, the length of extension and retraction of the first telescopic member 101, the second telescopic member 102, the third telescopic member 103, the fourth telescopic member 201 and the fifth telescopic member 202 is adjusted to control the gap between the mounting plate 3 and the folding dust curtain 5 and the coal wall, dust is prevented from rushing out of the folding dust curtain 5 due to the change of the thickness of the coal wall, and the dust is prevented from affecting the physical and mental health of workers; in this embodiment, the distance sensor 9 is connected with a controller, the first extensible member 101, the second extensible member 102, the third extensible member 103, the fourth extensible member 201 and the fifth extensible member 202 are all electrically connected with the controller, the controller sends the detected data signal to the controller through the distance sensor 9, and the controller controls the first extensible member 101, the second extensible member 102, the third extensible member 103, the fourth extensible member 201 and the fifth extensible member 202 to extend and retract, so that the gap between the mounting plate 3 and the foldable dust blocking curtain 5 and the coal wall 15 is controlled, and dust leakage is avoided.
As shown in fig. 4, a first hanging rod 10 is arranged on the fourth telescopic member 201, the fourth telescopic member 201 drives the first hanging rod 10 to slide back and forth on the fourth telescopic member 201, a second hanging rod 11 is arranged on the fifth telescopic member 202, the fifth telescopic member 202 drives the second hanging rod 11 to slide back and forth on the fifth telescopic member 202, the folding dust-blocking curtain 5 is arranged on the first hanging rod 10 and the second hanging rod 11, the folding dust-blocking curtain 5 is convenient to move left and right, interference between the folding dust-blocking curtain 5 and the fourth telescopic member 201 and the fifth telescopic member 202 can be avoided, and the folding dust-blocking curtain 5 is clamped on the fourth telescopic member 201 and the fifth telescopic member 202.
As shown in fig. 4, the mounting plate 3 is a U-shaped groove, the opening of the U-shaped groove faces downward, and the longitudinal extensible member 1 and the transverse extensible member 2 are both disposed in the U-shaped groove, so as to facilitate the mounting of the longitudinal extensible member 1 and the transverse extensible member 2.
In this embodiment, the transparent structure 6 is transparent glass, which increases the strength of the transparent structure 6 and facilitates the staff to observe the front condition; the longitudinal extensible member 1 and the transverse extensible member 2 are both oil cylinders.
As shown in fig. 1-3, the upper end of the mounting plate 3 is provided with a brush 12, and during the tunneling process of the tunneling machine, the brush 12 is always in contact with the upper coal wall to scrape the dust forward and enter the front area, so that the influence of the dust entering the rear area on the physical and mental health of workers is avoided.
As shown in fig. 5, a dust removal fan 13 is connected to the mounting hole 8, and during the tunneling process of the heading machine, the dust removal fan 13 sucks dust to remove dust, so that excessive dust accumulated in the front is reduced.
The specific working process of the application is as follows: the bottoms of the first telescopic part 101, the second telescopic part 102 and the third telescopic part 103 are fixed above the machine body of the heading machine 16, specifically, the first telescopic part 101, the second telescopic part 102 and the third telescopic part 103 can be fixed in a strong magnetic fixing mode, the mounting stability is increased, a driver controls the heading work of the heading machine 16 in a cockpit 14, in the heading process, along with the collapse of the coal wall 15, the gap between the coal wall 15 and the folding dust-blocking curtain 5 and the mounting plate 3 is easy to expand, the distance sensor 9 detects the change of the distances between the mounting plate 3, the fourth telescopic part 201 and the fifth telescopic part 202 and the coal wall 15, the controller controls the first telescopic part 101, the second telescopic part 102, the third telescopic part 103, the fourth telescopic part 201 and the fifth telescopic part 202 to move, the gap between the folding dust-blocking curtain 5 and the mounting plate 3 and the coal wall 15 is effectively controlled, dust is prevented from escaping from the heading machine 16 through the gap to the folding dust-blocking curtain 5 and is sucked away through the dust-removing, the influence of dust on physical and psychological health of workers in the cockpit is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a purification device is kept apart to visual dirt source, its characterized in that, including vertical extensible member (1) and horizontal extensible member (2), vertical extensible member (1) one end is connected with mounting panel (3), horizontal extensible member (2) are fixed on mounting panel (3), vertical extensible member (1) with be provided with folding sealed curtain (4) between mounting panel (3), horizontal extensible member (2) with be provided with folding fender dirt curtain (5) between mounting panel (3), vertical extensible member (1) in-process drive mounting panel (3) with folding sealed curtain (4) reciprocate, horizontal extensible member (2) flexible in-process drives folding fender dirt curtain (5) are removed and are removed.
2. The visual dust source isolation and purification device according to claim 1, wherein the longitudinal expansion piece (1) comprises a first expansion piece (101), a second expansion piece (102) and a third expansion piece (103) which are sequentially arranged in parallel, the transverse expansion piece (2) comprises a fourth expansion piece (201) and a fifth expansion piece (202) which are fixed at two ends of a mounting plate (3), a transparent structure (6) is fixed between the first expansion piece (101) and the second expansion piece (102), the folding sealing curtain (4) is arranged above the transparent structure (6), a partition plate (7) is fixed between the second expansion piece (102) and the third expansion piece (103), the folding sealing curtain (4) is arranged above the partition plate (7), and a mounting hole (8) is formed in the partition plate (7).
3. The isolating and purifying device for visual dust source according to claim 2, characterized in that a distance sensor (9) is arranged on the upper side of the mounting plate (3), a distance sensor (9) is arranged on the end of the fourth telescopic member (201) far away from the fifth telescopic member (202), and a distance sensor (9) is arranged on the end of the fifth telescopic member (202) far away from the fourth telescopic member (201).
4. The visual dust source isolation and purification device according to claim 3, wherein a first hanging rod (10) is arranged on the fourth telescopic member (201), the fourth telescopic member (201) drives the first hanging rod (10) to slide back and forth on the fourth telescopic member (201), a second hanging rod (11) is arranged on the fifth telescopic member (202), the fifth telescopic member (202) drives the second hanging rod (11) to slide back and forth on the fifth telescopic member (202), and the folding dust-blocking curtain (5) is arranged on the first hanging rod (10) and the second hanging rod (11).
5. The visual dust source isolation and purification device according to claim 1, wherein the mounting plate (3) is a U-shaped groove with an opening facing downwards, and the longitudinal expansion member (1) and the transverse expansion member (2) are both arranged in the U-shaped groove.
6. The dust source isolating and purifying device according to claim 2, wherein the transparent structure (6) is transparent glass.
7. A visual dust source isolation and purification device according to claim 1, wherein the upper end of the mounting plate (3) is provided with a brush (12).
8. The isolating and purifying device for visual dust source as claimed in claim 2, wherein a dust removing fan (13) is connected to the mounting hole (8).
9. The visual dust source isolation and purification device according to claim 1, wherein the longitudinal expansion piece (1) and the transverse expansion piece (2) are both oil cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606893.XA CN111691884A (en) | 2020-06-29 | 2020-06-29 | Visual dust source isolation and purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606893.XA CN111691884A (en) | 2020-06-29 | 2020-06-29 | Visual dust source isolation and purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111691884A true CN111691884A (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010606893.XA Pending CN111691884A (en) | 2020-06-29 | 2020-06-29 | Visual dust source isolation and purification device |
Country Status (1)
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| CN (1) | CN111691884A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USH323H (en) * | 1986-05-08 | 1987-09-01 | The United States Of America As Represented By The Secretary Of The Army | Electromechanical lag angle detector |
| CN2934580Y (en) * | 2006-08-03 | 2007-08-15 | 兖州煤业股份有限公司 | Dust-removing device of fully-mechanized coal driving workface |
| CN102094664A (en) * | 2011-01-27 | 2011-06-15 | 中国矿业大学 | Hydraulic bracket for end of comprehensive mechanized filling coal face |
| CN203702229U (en) * | 2013-12-28 | 2014-07-09 | 冀中能源峰峰集团有限公司梧桐庄矿 | Telescopic dustproof curtain |
| CN104912584A (en) * | 2015-06-26 | 2015-09-16 | 淮南矿业(集团)有限责任公司 | Tunnel dustproof curtain structure |
| CN105697052A (en) * | 2014-11-28 | 2016-06-22 | 昆明中铁大型养路机械集团有限公司 | Tunnel dust removal car with drawer type dust collecting cabin and use method thereof |
| CN107355250A (en) * | 2017-05-22 | 2017-11-17 | 刘娟 | From the adjustable air decontamination curtain of shifting |
| CN208950628U (en) * | 2018-09-30 | 2019-06-07 | 河南理工大学 | A kind of Simple dust removal device applied to digging laneway foldable dismounting |
-
2020
- 2020-06-29 CN CN202010606893.XA patent/CN111691884A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USH323H (en) * | 1986-05-08 | 1987-09-01 | The United States Of America As Represented By The Secretary Of The Army | Electromechanical lag angle detector |
| CN2934580Y (en) * | 2006-08-03 | 2007-08-15 | 兖州煤业股份有限公司 | Dust-removing device of fully-mechanized coal driving workface |
| CN102094664A (en) * | 2011-01-27 | 2011-06-15 | 中国矿业大学 | Hydraulic bracket for end of comprehensive mechanized filling coal face |
| CN203702229U (en) * | 2013-12-28 | 2014-07-09 | 冀中能源峰峰集团有限公司梧桐庄矿 | Telescopic dustproof curtain |
| CN105697052A (en) * | 2014-11-28 | 2016-06-22 | 昆明中铁大型养路机械集团有限公司 | Tunnel dust removal car with drawer type dust collecting cabin and use method thereof |
| CN104912584A (en) * | 2015-06-26 | 2015-09-16 | 淮南矿业(集团)有限责任公司 | Tunnel dustproof curtain structure |
| CN107355250A (en) * | 2017-05-22 | 2017-11-17 | 刘娟 | From the adjustable air decontamination curtain of shifting |
| CN208950628U (en) * | 2018-09-30 | 2019-06-07 | 河南理工大学 | A kind of Simple dust removal device applied to digging laneway foldable dismounting |
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Application publication date: 20200922 |
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| RJ01 | Rejection of invention patent application after publication |