CN102251791A - Folded ventilation duct assembly - Google Patents
Folded ventilation duct assembly Download PDFInfo
- Publication number
- CN102251791A CN102251791A CN2011101645062A CN201110164506A CN102251791A CN 102251791 A CN102251791 A CN 102251791A CN 2011101645062 A CN2011101645062 A CN 2011101645062A CN 201110164506 A CN201110164506 A CN 201110164506A CN 102251791 A CN102251791 A CN 102251791A
- Authority
- CN
- China
- Prior art keywords
- air duct
- line
- drag
- ventilation duct
- ripple
- 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.)
- Granted
Links
Images
Abstract
The invention discloses a folded ventilation duct assembly comprising a guide rail, a corrugated ventilation duct and a drive assembly, wherein the corrugated ventilation duct is arranged at the guide rail and can be folded and unfolded along an axial direction; the guide rail is fixedly arranged at a roadway and the front end of the guide rail is located at a tunneling end of the roadway; the drive assembly comprises a fixed pulley, a power plant and a stay cable; and a driving wheel arranged at a rotating power takeoff end of the power plant is used for driving the corrugated ventilation duct to be folded and unfolded along the guide rail and is in running fit with the rotating power takeoff end of the power plant. In the invention, the stretching range is not limited by the structure; during blasting, the corrugated ventilation duct is in a folded state and farther away from a shot point, and at the instant when the blasting is completed, the corrugated ventilation duct is stretched forward; the front end of the corrugated ventilation duct reaches the most front end of the roadway so that a better effect of sucking out dust and harmful gas is achieved; a rigid structure of a ventilation duct in the prior art is changed so that the advantages of light weight, small volume, convenience for installation, use and transportation, and lower manufacturing cost are achieved; and flying rocks and blast waves generated during the blasting can be effectively kept off and buffered so that the service life of the ventilation duct is prolonged.
Description
Technical field
The present invention relates to a kind of tunnelling ventilation equipment that are used for, particularly a kind of packaged type air duct belongs to the well lane engineering technology.
Background technology
Explosion is the comparatively general means of tunnelling, has the higher characteristics of efficient.Because explosion is the energy that utilizes the explosive blasting instantaneous relase, destroy its medium on every side, the technological means of reach excavation, filling, removing or get specific objectives such as material, thereby can produce bigger dust, simultaneously, also can produce more toxic and harmful in the explosion tunneling process, particularly for coal mine roadway, the harm of dust and pernicious gas is then more outstanding.In order to protect operator's health of human body, increase work efficiency, dust and gas that explosion produces in time need be discharged the tunnel.For addressing the above problem, generally the technological means of Cai Yonging is the air duct air draft.Promptly utilize dust that air duct and blower fan produce explosion etc. to attract to discharge by air duct.Reduce dust and content of harmful gas in the tunnel.
In the prior art, the air duct that is used for the tunnelling ventilation often places bottom, middle part or the middle and upper part in tunnel, all adopts to fixedly install, and blasting flyrock and shock wave destroy air duct easily.For avoiding the problems referred to above, air duct is placed the top, tunnel, avoid or reduce blasting flyrock clashing into though be beneficial to, can't avoid the influence of shock wave, reduce the application life of air duct, increase use cost.For addressing the above problem, a series of moving or the Telescopic air duct structure occur, but be subjected to structural limitations, flexible or distance is shorter, can't avoid the impact of blasting flyrock etc. fully.
And existing air duct is hard structure, can not the buffer shooting slungshot and the impact of shock wave, very easily damage, and it is comparatively serious to damage the back shape deformation, can't continue to use, and has increased the cost of tunnelling; And volume is bigger, and weight is big, is unfavorable for installing, use and transporting.
Therefore, need improve existing air duct structure, has the effect of sucking-off dust and pernicious gas preferably, the distance of hiding with broad, can avoid or slungshot and shock wave that buffer shooting produces, prolong the application life of air duct, save use cost, and overall weight is light, volume is little, conveniently installs, uses and transport.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of folded form air duct assembly, has the effect of sucking-off dust and pernicious gas preferably, the distance of hiding with broad, can avoid or slungshot and shock wave that buffer shooting produces, prolong the application life of air duct, save use cost, and overall weight is light, volume is little, conveniently installs, uses and transport.
Folded form air duct assembly of the present invention comprises guided way, ripple air duct and driven unit, and described ripple air duct is arranged at guided way and can folds vertically and stretch, and described guided way is fixedly set in the tunnel and its front end is positioned at the tunnelling end;
Described driven unit comprises fixed pulley, power set and drag-line, described fixed pulley is positioned at the tunnelling end, power set are positioned at the rear end, tunnel, described power set are provided with the rotary power output, cooperate with its rotary power output transmission to be provided with to be used to drive the driving wheel that the ripple air duct is folding along guided way and stretch.
Further, the rear end, tunnel is positioned at the top and is provided with trussed construction, and described guided way front end is fixed in tunnelling end top, and the trussed construction front end is fixed in the rear end, described ripple air duct tail end is fixedly set in the trussed construction front end, and guided way passes the ripple air duct vertically makes the ripple air duct be hung on guided way;
Further, described trussed construction is provided with the fixedly air duct that docks with ripple air duct tail end;
Further, described ripple air duct is made by flexible material, and its front-end and back-end are respectively the sclerosphere mouth;
Further, described guided way is a guide line, and described trussed construction front end is set with the regulating wheel of click structure, and described guide line front end is fixed in tunnelling end top, and the rear end is connected in regulating wheel; The rope section that described guide line is used to hang the ripple air duct is with the guide pipe of smooth outer surface outward;
Further, described power set and driving wheel are arranged in the casing, the power output shaft two end supports of power set in casing and with its cooperating around the mode of self rotational, described driving wheel is coated at power output shaft and cooperates with its transmission;
Further, described driving wheel is divided into front wheel driving roller and rear drive roller, and described drag-line comprises drag-line I and drag-line II, and ripple air duct front end is connected in the front wheel driving roller by the drag-line I that walks around fixed pulley, and ripple air duct rear end is connected in the rear drive roller by drag-line II; It is opposite with the direction that drag-line II is around in the rear drive roller that described drag-line I is around in the front wheel driving roller;
Described front wheel driving roller is arranged at the power output shaft of power set by freewheel clutch I, and described rear drive roller is arranged at the power output shaft of power set by freewheel clutch II, and described freewheel clutch I is opposite with freewheel clutch II engagement direction;
Further, described drag-line one end is connected in ripple air duct front end, and the other end is connected in ripple air duct rear end after walking around fixed pulley and driving wheel successively; Described drag-line is around in driving wheel at least two circles;
Further, described power set are air motor, are provided with the reversal valve that is used to make air motor rotating conversion between described air motor and the driving source of the gas;
Further, described power set are explosion-proof drive motors.
The invention has the beneficial effects as follows: folded form air duct assembly of the present invention, adopt folding ripple air duct structure, flexible scope is not subjected to structural limitations, during explosion, the ripple air duct is in folded state and is positioned at the rear end, tunnel, can be far away apart from blow-up point, the moment that explosion is finished stretches the ripple air duct forward, its front end is used to discharge dust and pernicious gas to the tunnel foremost, has the effect of sucking-off dust and pernicious gas preferably; The present invention has changed the hard structure of prior art air duct, and is in light weight, volume is little, conveniently installs, uses and transport, and cost of manufacture is lower; Not only can make air duct avoid slungshot and shock wave that explosion produces, can also effectively cushion the destruction of slungshot and shock wave, prolong the application life of air duct, save use cost.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the tension wheel structure schematic diagram;
Fig. 3 is first kind of structural representation of driven unit;
Fig. 4 is second kind of structural representation of driven unit;
Fig. 5 control principle figure of the present invention.
The specific embodiment
Fig. 1 is a structural representation of the present invention, Fig. 2 is the tension wheel structure schematic diagram, Fig. 3 is first kind of structural representation of driven unit, Fig. 5 control principle figure of the present invention, as shown in the figure: the folded form air duct assembly of present embodiment, comprise guided way, ripple air duct 1 and driven unit, described ripple air duct 1 is arranged at guided way and can folds vertically and stretch, and described guided way is fixedly set in the tunnel and its front end is positioned at tunnel 11 driving ends;
Described driven unit comprises fixed pulley 7, power set 18 and drag-line 2, described fixed pulley 7 is positioned at tunnel 11 driving ends, power set 18 are positioned at 11 rear ends, tunnel, described power set 18 are provided with the rotary power output, cooperate with its rotary power output transmission to be provided with to be used to drive the driving wheel 15 that ripple air duct 1 is folding along guided way and stretch.
In the present embodiment, 11 rear ends, tunnel are positioned at the top and are provided with trussed construction 4, described guided way front end is fixed in 11 driving end tops, tunnel, trussed construction 4 front ends are fixed in the rear end, described ripple air duct 1 tail end is fixedly set in trussed construction 4 front ends, and guided way passes ripple air duct 1 vertically makes ripple air duct 1 be hung on guided way; Adopt trussed construction 4, make the present invention have mounting structure, be convenient to install parts such as driven unit and support guide rail than firm stable.
In the present embodiment, described trussed construction 4 is provided with the fixedly air duct 6 that docks with ripple air duct 1 tail end; Further expand air draft distance of the present invention, pernicious gas and dust are discharged smoothly in the assurance tunnel.
In the present embodiment, described ripple air duct 1 is made by flexible material, and its front-end and back-end are respectively the sclerosphere mouth, are respectively sclerosphere mouth 1a and sclerosphere mouth 1b among the figure; Flexible material weight is lighter, more can be adapted to install and use in the tunnel and carry; And flexible material has better buffering effect to the impact of slungshot and shock wave; The sclerosphere mouth can guarantee the intensity of ripple air duct, is beneficial to air draft.
In the present embodiment, described guided way is a guide line 9, described trussed construction 4 front ends are set with the regulating wheel 3 of click structure, described guide line 9 front ends are fixed in 11 driving end tops, tunnel, the rear end is connected in regulating wheel 3, as shown in the figure, the click structure comprises ratchet 14, ratchet 12 and support 13, support 13 is fixedly set in trussed construction 4, ratchet 12 is articulated in support, ratchet 14 and regulating wheel 3 are in the circumferencial direction secure fit, and ratchet 12 meshes with ratchet 14 opposite with regulating wheel 3 tension direction; The rope section that described guide line 9 is used to hang ripple air duct 1 is with the guide pipe 10 of smooth outer surface outward; Adopt the guide line structure, further increase its shock resistance, and be beneficial to and carry and install; Guide pipe 10 can reduce ripple air duct and its frictional force, makes that the ripple air duct is folding and it is smooth and easy without hindrance to stretch, and saves drive energy, makes the air draft process smooth.
In the present embodiment, described power set 18 and driving wheel 15 are arranged in the casing 17, power output shaft 16 two end supports of power set 18 in casing 17 and with its cooperating around the mode of self rotational, described driving wheel 15 is coated at power output shaft 16 and cooperates with its transmission; Be arranged to be beneficial in the casing 17 and avoid impacting, and be beneficial to dustproofly, guarantee to keep clean between the kinematic pair of moving component.
In the present embodiment, described drag-line 2 one ends are connected in ripple air duct 1 front end, and the other end is connected in ripple air duct 1 rear end after walking around fixed pulley 7 and driving wheel 5 successively; Described drag-line 2 is around in driving wheel 5 at least two circles, and present embodiment is two circles; Simple in structure, installing/dismounting is easy, drives comparatively flexible.
In the present embodiment, described power set 18 are air motor, are provided with the reversal valve 23 that is used to make air motor rotating conversion between described air motor and the driving source of the gas 22, also are provided with flow speed control valve 21 between reversal valve and the source of the gas 22; Reversal valve 23 adopts manual reverse of direction, can adopt any structure of prior art, comprises three way cock, three position four-way directional control valve or the like; Promptly adopt three position four-way directional control valve in the present embodiment; The employing air motor drives, and is beneficial to explosion-proofly, and source of the gas obtains easily, and the drive system overall volume is less, and use cost is low.
Certainly, power set 18 also can adopt explosion-proof drive motors, and installation and removal are simple, and equipment volume is little, does not need other ancillary service.
Fig. 4 is second kind of structural representation of driven unit, as shown in the figure, only be with the difference of first kind of structure: the described driving wheel of this structure is divided into front wheel driving roller 15a and rear drive roller 15b, be arranged in the casing 17a, described drag-line 2 comprises drag-line I 2a and drag-line II 2b, ripple air duct 1 front end is connected in front wheel driving roller 15a by the drag-line I 2a that walks around fixed pulley 7, and ripple air duct 1 rear end is connected in rear drive roller 15b by drag-line II 2b; It is opposite with the direction that drag-line II 2b is around in rear drive roller 15b that described drag-line I 2a is around in front wheel driving roller 15a; Described front wheel driving roller 15a is arranged at the power output shaft 16 of power set 18 by freewheel clutch I 19, described rear drive roller 15b is arranged at the power output shaft 16 of power set 18 by freewheel clutch II 20, and described freewheel clutch I 19 is opposite with freewheel clutch II 20 engagement directions; Adopt the fit structure of freewheel clutch, passive drag-line can initiatively be discharged, avoid motion artifacts, can guarantee the tensioning characteristic of drag-line by long period, thereby guarantee the flexibility of operation.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. folded form air duct assembly, it is characterized in that: comprise guided way, ripple air duct and driven unit, described ripple air duct is arranged at guided way and can folds vertically and stretch, and described guided way is fixedly set in the tunnel and its front end is positioned at the tunnelling end;
Described driven unit comprises fixed pulley, power set and drag-line, described fixed pulley is positioned at the tunnelling end, power set are positioned at the rear end, tunnel, described power set are provided with the rotary power output, cooperate with its rotary power output transmission to be provided with to be used to drive the driving wheel that the ripple air duct is folding along guided way and stretch.
2. folded form air duct assembly according to claim 1, it is characterized in that: the rear end, tunnel is positioned at the top and is provided with trussed construction, described guided way front end is fixed in tunnelling end top, the trussed construction front end is fixed in the rear end, described ripple air duct tail end is fixedly set in the trussed construction front end, and guided way passes the ripple air duct vertically makes the ripple air duct be hung on guided way.
3. folded form air duct assembly according to claim 2 is characterized in that: described trussed construction is provided with the fixedly air duct that docks with ripple air duct tail end.
4. folded form air duct assembly according to claim 3 is characterized in that: described ripple air duct is made by flexible material, and its front-end and back-end are respectively the sclerosphere mouth.
5. folded form air duct assembly according to claim 4, it is characterized in that: described guided way is a guide line, described trussed construction front end is set with the regulating wheel of click structure, and described guide line front end is fixed in tunnelling end top, and the rear end is connected in regulating wheel; The rope section that described guide line is used to hang the ripple air duct is with the guide pipe of smooth outer surface outward.
6. folded form air duct assembly according to claim 5, it is characterized in that: described power set and driving wheel are arranged in the casing, the power output shaft two end supports of power set in casing and with its cooperating around the mode of self rotational, described driving wheel is coated at power output shaft and cooperates with its transmission.
7. folded form air duct assembly according to claim 6, it is characterized in that: described driving wheel is divided into front wheel driving roller and rear drive roller, described drag-line comprises drag-line I and drag-line II, ripple air duct front end is connected in the front wheel driving roller by the drag-line I that walks around fixed pulley, and ripple air duct rear end is connected in the rear drive roller by drag-line II; It is opposite with the direction that drag-line II is around in the rear drive roller that described drag-line I is around in the front wheel driving roller;
Described front wheel driving roller is arranged at the power output shaft of power set by freewheel clutch I, and described rear drive roller is arranged at the power output shaft of power set by freewheel clutch II, and described freewheel clutch I is opposite with freewheel clutch II engagement direction.
8. folded form air duct assembly according to claim 6 is characterized in that: described drag-line one end is connected in ripple air duct front end, and the other end is connected in ripple air duct rear end after walking around fixed pulley and driving wheel successively; Described drag-line is around in driving wheel at least two circles.
9. according to the described folded form air duct of the arbitrary claim of claim 1 to 8 assembly, it is characterized in that: described power set are air motor, are provided with the reversal valve that is used to make air motor rotating conversion between described air motor and the driving source of the gas.
10. according to the described folded form air duct of the arbitrary claim of claim 1 to 8 assembly, it is characterized in that: described power set are explosion-proof drive motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110164506 CN102251791B (en) | 2011-06-17 | 2011-06-17 | Folded ventilation duct assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110164506 CN102251791B (en) | 2011-06-17 | 2011-06-17 | Folded ventilation duct assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102251791A true CN102251791A (en) | 2011-11-23 |
| CN102251791B CN102251791B (en) | 2013-10-23 |
Family
ID=44979328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110164506 Expired - Fee Related CN102251791B (en) | 2011-06-17 | 2011-06-17 | Folded ventilation duct assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102251791B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321668A (en) * | 2013-07-08 | 2013-09-25 | 中煤科工集团重庆研究院 | Automatic control device for extending and retracting framework air cylinder |
| CN105134277A (en) * | 2015-07-16 | 2015-12-09 | 武汉大学 | Free telescopic tube head device for ventilation of tunnel |
| CN106761899A (en) * | 2017-01-25 | 2017-05-31 | 徐州徐工基础工程机械有限公司 | A kind of tunnel dust removal machine |
| CN107255040A (en) * | 2017-07-18 | 2017-10-17 | 中国煤炭科工集团太原研究院有限公司 | A kind of air duct mobile device for colliery speedy drivage |
| CN112502778A (en) * | 2020-11-29 | 2021-03-16 | 重庆梅安森科技股份有限公司 | Active blasting energy absorption device for air duct |
| CN112497565A (en) * | 2019-09-16 | 2021-03-16 | 天津纽威特橡胶制品股份有限公司 | Air-cooled cold glue machine |
| CN112502779A (en) * | 2020-11-29 | 2021-03-16 | 重庆梅安森科技股份有限公司 | Active blasting energy-absorbing vehicle for air duct |
| CN113586122A (en) * | 2021-08-18 | 2021-11-02 | 安徽理工大学 | Colliery is combined and is dug working face low windage low noise dryer device |
| CN113622985A (en) * | 2021-09-23 | 2021-11-09 | 陕西竹园嘉原矿业有限公司 | Fan assembly for removing dust in mine tunnel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0066000A1 (en) * | 1981-06-02 | 1982-12-08 | Oldorid Kunststoff GmbH | Extension unit for a ventilation tubing |
| CN2594467Y (en) * | 2002-12-27 | 2003-12-24 | 林亚坤 | Telescopic mining ventilating tunnel |
| WO2007081216A1 (en) * | 2006-01-10 | 2007-07-19 | Protan A/S | Method and system for venting tunnels; mine galleries or the like |
| CN201747395U (en) * | 2010-08-30 | 2011-02-16 | 泰州海本蓬网有限公司 | Air duct |
-
2011
- 2011-06-17 CN CN 201110164506 patent/CN102251791B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0066000A1 (en) * | 1981-06-02 | 1982-12-08 | Oldorid Kunststoff GmbH | Extension unit for a ventilation tubing |
| CN2594467Y (en) * | 2002-12-27 | 2003-12-24 | 林亚坤 | Telescopic mining ventilating tunnel |
| WO2007081216A1 (en) * | 2006-01-10 | 2007-07-19 | Protan A/S | Method and system for venting tunnels; mine galleries or the like |
| CN201747395U (en) * | 2010-08-30 | 2011-02-16 | 泰州海本蓬网有限公司 | Air duct |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321668A (en) * | 2013-07-08 | 2013-09-25 | 中煤科工集团重庆研究院 | Automatic control device for extending and retracting framework air cylinder |
| CN103321668B (en) * | 2013-07-08 | 2015-04-29 | 中煤科工集团重庆研究院有限公司 | Automatic control device for extending and retracting framework air cylinder |
| CN105134277A (en) * | 2015-07-16 | 2015-12-09 | 武汉大学 | Free telescopic tube head device for ventilation of tunnel |
| CN106761899A (en) * | 2017-01-25 | 2017-05-31 | 徐州徐工基础工程机械有限公司 | A kind of tunnel dust removal machine |
| CN107255040A (en) * | 2017-07-18 | 2017-10-17 | 中国煤炭科工集团太原研究院有限公司 | A kind of air duct mobile device for colliery speedy drivage |
| CN107255040B (en) * | 2017-07-18 | 2023-08-15 | 中国煤炭科工集团太原研究院有限公司 | Air duct moving device for rapid tunneling of coal mine |
| CN112497565A (en) * | 2019-09-16 | 2021-03-16 | 天津纽威特橡胶制品股份有限公司 | Air-cooled cold glue machine |
| CN112502779A (en) * | 2020-11-29 | 2021-03-16 | 重庆梅安森科技股份有限公司 | Active blasting energy-absorbing vehicle for air duct |
| CN112502778A (en) * | 2020-11-29 | 2021-03-16 | 重庆梅安森科技股份有限公司 | Active blasting energy absorption device for air duct |
| CN112502779B (en) * | 2020-11-29 | 2023-08-25 | 重庆梅安森科技股份有限公司 | Active blasting energy-absorbing vehicle for air duct |
| CN112502778B (en) * | 2020-11-29 | 2023-08-25 | 重庆梅安森科技股份有限公司 | Active blasting energy-absorbing device for air duct |
| CN113586122A (en) * | 2021-08-18 | 2021-11-02 | 安徽理工大学 | Colliery is combined and is dug working face low windage low noise dryer device |
| CN113622985A (en) * | 2021-09-23 | 2021-11-09 | 陕西竹园嘉原矿业有限公司 | Fan assembly for removing dust in mine tunnel |
| CN113622985B (en) * | 2021-09-23 | 2023-09-19 | 陕西竹园嘉原矿业有限公司 | Fan assembly for dedusting in mine tunnel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102251791B (en) | 2013-10-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102251791B (en) | Folded ventilation duct assembly | |
| CN204961179U (en) | Wind turbine blades purger | |
| CN104958967B (en) | Intelligent-tracking exhaust collection cleaning system | |
| CN203079332U (en) | Fully-sealed bidirectional movement reversible distribution bin belt conveyor | |
| CN103742187B (en) | Excavation face in coal mine short distance combined dust-eliminating method | |
| JP5814095B2 (en) | Duct device and dust collection system in tunnel | |
| CN109625780B (en) | Integral self-moving telescopic type 0-90 o Conveyor | |
| CN106761899B (en) | A kind of tunnel dust removal machine | |
| CN210829354U (en) | Ventilation unit for coal mining | |
| CN202081903U (en) | Retractable fan drum assembly | |
| CN111921629A (en) | Vertical shaft hammer type sand making machine | |
| CN204186389U (en) | Development machine dedusting fan | |
| CN203638799U (en) | Intelligent full cross section bunker cleaning machine | |
| CN204402476U (en) | The reciprocal blanking of a kind of headstock rolls rake charging development machine | |
| CN106592483A (en) | Main brush driving device for pure electric sweeping vehicle | |
| CN207632152U (en) | A kind of dust-extraction unit on cement loading siding | |
| CN114278360B (en) | Mobile dust blocking, trapping and oxygen supplying device and method based on tunnel construction operation | |
| CN109385972A (en) | A kind of portable gardens dead leaf adsorption recovery equipment | |
| CN205887305U (en) | Air supplying type spraying machine every single move adjustment mechanism | |
| CN112343643B (en) | Self-propelled air replacement device for coal mine tunnel that can prevent anticollision and empty | |
| CN202081902U (en) | Movable air barrel assembly | |
| CN102425133A (en) | Blowing and sucking machine | |
| CN203558451U (en) | Pneumatic scraper plate conveyer | |
| CN206652814U (en) | Dedusting car wind-drive device | |
| CN202558909U (en) | Magnesium metal dedicated compound rotational flow pneumatic slag-drawing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20140617 |
|
| EXPY | Termination of patent right or utility model |