CN208650895U - Fully-mechanized mining working Air return corner air ducting and system - Google Patents
Fully-mechanized mining working Air return corner air ducting and system Download PDFInfo
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- CN208650895U CN208650895U CN201820943266.3U CN201820943266U CN208650895U CN 208650895 U CN208650895 U CN 208650895U CN 201820943266 U CN201820943266 U CN 201820943266U CN 208650895 U CN208650895 U CN 208650895U
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- 238000005065 mining Methods 0.000 title claims abstract description 53
- 230000007704 transition Effects 0.000 claims abstract description 10
- 239000003245 coal Substances 0.000 claims description 19
- 230000008676 import Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 3
- 230000008602 contraction Effects 0.000 abstract description 10
- 230000000505 pernicious effect Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
The utility model embodiment discloses a kind of fully-mechanized mining working Air return corner air ducting, include: telescopic oil cylinder, connecting rod and for by it is distinguished and admirable guiding fully-mechanized mining working Air return corner wind-guiding curtain, wind-guiding curtain is hung in connecting rod, the piston rod of telescopic oil cylinder is fixedly connected with the connecting rod, telescopic oil cylinder is mobile by the flexible drive connecting rod of piston rod, to realize the expansion and contraction of wind-guiding curtain.The utility model embodiment also discloses a kind of fully-mechanized mining working Air return corner Air System, and including transition bracket and above-mentioned fully-mechanized mining working Air return corner air ducting, telescopic oil cylinder is mounted on transition bracket.It can be in the case where not influencing coalcutter normal work, by distinguished and admirable guiding Air return corner using the utility model embodiment, it is possible to increase the air quantity of Air return corner improves the expulsion efficiency of pernicious gas in Air return corner, it is ensured that personnel safety improves operating safety factor.
Description
Technical field
The utility model embodiment is related to technical field of coal mine, and in particular to a kind of fully-mechanized mining working Air return corner wind-guiding dress
It sets and system.
Background technique
The characteristics of fully-mechanized mining working tail equipment is arranged determines that the distinguished and admirable resistance flowed through from Air return corner is much larger than along coal
Wall flows into the resistance of air return way, causes Air return corner air quantity is small, oxygen concentration is low, toxic and harmful gas is easy to gather.Ensure
It is the important topic of coal mine long-term stability that Air return corner air quality is up to standard.At present, it is ensured that fully-mechanized mining working Air return corner oxygen
The main method of concentration are as follows: install booster in fully-mechanized mining working Air return corner and reinforce the backfill of goaf earth's surface.
Fully-mechanized mining working Air return corner installs booster, is divided by place is installed: booster is installed in liquid
On pressure bracket and booster is installed in and is rolled back and rationalized in tunnel.It, will be logical with part after booster is installed on hydraulic support
The air duct of blower connection extends to Air return corner, booster by working face it is fresh it is distinguished and admirable be transported to Air return corner, improve
Operating condition.Booster is installed in and is rolled back and rationalized in tunnel, the pernicious gas of Air return corner upper corner is extracted out, Air return corner
Upper corner pressure reduction so that it is fresh it is distinguished and admirable voluntarily flow to upper corner, improve operating condition.Either in hydraulic support
Or booster is set in tunnel of rolling back and rationalizing, and production operation all can be installed and be safeguarded by air duct, local ventilation is electromechanical
The restriction of source reliability；And booster does not allow to use in the working face for having gas, and limitation is very big.
The backfill of goaf earth's surface: due to the propulsion of fully-mechanized mining working, goaf top plate sinks, and earth's surface is caused constantly to crack production
Life is leaked out, and so that the distinguished and admirable of upper corner is become smaller, methane accumulation.Therefore, ground must follow the progress of fully-mechanized mining working to backfill in time
Crack prevents distinguished and admirable leak.Earth's surface backfill is at high cost, and being easy climate influences, and operability is low.
Utility model content
In view of this, the utility model embodiment proposes a kind of fully-mechanized mining working Air return corner air ducting and system, with
Solve above-mentioned technical problem.
The utility model embodiment proposes a kind of fully-mechanized mining working Air return corner air ducting comprising: telescopic oil cylinder, company
Extension bar and for by the wind-guiding curtain of distinguished and admirable guiding fully-mechanized mining working Air return corner, wind-guiding curtain to be hung in connecting rod, telescopic oil cylinder
Piston rod be fixedly connected with the first end of connecting rod, telescopic oil cylinder is mobile by the flexible drive connecting rod of piston rod, with reality
The expansion and contraction of existing wind-guiding curtain.
It optionally, further include slideway, piston rod and the connecting rod of telescopic oil cylinder are arranged in parallel, the second end setting of connecting rod
On slideway.
It optionally, further include multiple hanging rings, wind-guiding curtain is hung in connecting rod by the multiple hanging ring, wherein distance
The nearest hanging ring of connecting rod second end is fixed on slideway, the end of the hanging ring nearest apart from connecting rod first end and piston rod
Portion is fixedly connected.
It optionally, further include vertical bar, the vertical bar is vertical with piston rod and connecting rod respectively to be connect.
Optionally, further include main control module, coal winning machine position detection module, feed liquor main line, return liquid main line, the first electricity
Magnet valve, second solenoid valve, the first two-position three-way valve and the second two-position three-way valve, main control module detect mould with coal winning machine position respectively
Block, the first solenoid valve and second solenoid valve electrical connection, wherein feed liquor main line includes the first branch and second branch, returns liquid master
Pipeline includes third branch and the 4th branch；The first branch oil inlet with the oil inlet of the first solenoid valve and second solenoid valve respectively
Mouthful connection, the outlet of the first solenoid valve connect with the control mouth of the first two-position three-way valve, the outlet of second solenoid valve and second liang
The control mouth of position three-way valve connects, and the oil return opening of the first solenoid valve and second solenoid valve is connect with third branch respectively；Second
Road is connect with the oil inlet of the oil inlet of the first two-position three-way valve and the second two-position three-way valve respectively, the first two-position three-way valve and
The oil return opening of two two-position three-way valves is connect with the 4th branch respectively, the outlet of the first two-position three-way valve and telescopic oil cylinder first into
Mouth connection, the outlet of the second two-position three-way valve and the second import of telescopic oil cylinder connect；Coal winning machine position detection module, for examining
It surveys the position data of coalcutter and position data is sent to main control module；Main control module is for receiving position data and according to connecing
The opening and closing of the position data control the first solenoid valve and second solenoid valve that receive.
Optionally, main control module is side protection plate of hydraulic support control system.
It optionally, further include bidirectional hydraulic lock, the outlet of the first two-position three-way valve is arranged in and the oil that stretches in bidirectional hydraulic lock
On the connecting line of first import of cylinder, the outlet of the second two-position three-way valve and the second import of telescopic oil cylinder.
It optionally, further include safety valve, safety valve is in parallel with telescopic oil cylinder.
Optionally, main control module controls the opening and closing of the first solenoid valve and second solenoid valve by Ma jade-like stone driving plate.
The utility model embodiment also provides a kind of fully-mechanized mining working Air return corner Air System comprising transition bracket and
Above-mentioned fully-mechanized mining working Air return corner air ducting, the telescopic oil cylinder of fully-mechanized mining working Air return corner air ducting were mounted on
It crosses on bracket.
Fully-mechanized mining working Air return corner air ducting provided by the embodiment of the utility model and system are by hanging wind-guiding curtain
It is located in connecting rod, telescopic oil cylinder drives the mobile expansion and contraction for realizing wind-guiding curtain of connecting rod, and not influencing, coalcutter is normal
In the case where work, by distinguished and admirable guiding Air return corner, it is possible to increase the air quantity of Air return corner improves pernicious gas in Air return corner
Expulsion efficiency, it is ensured that personnel safety improves operating safety factor；The air ducting building block is few, and structure is simple, production cost
It is low, and installation requirement is low, adaptable while easy to operate, high reliablity.
Detailed description of the invention
Structure when Fig. 1 is the wind-guiding curtain expansion of the fully-mechanized mining working Air return corner air ducting of the utility model embodiment
Schematic diagram.
Fig. 2 is the structure when wind-guiding curtain of the fully-mechanized mining working Air return corner air ducting of the utility model embodiment is shunk
Schematic diagram.
Fig. 3 is the hydraulic control of the telescopic oil cylinder of the fully-mechanized mining working Air return corner air ducting of the utility model embodiment
Schematic diagram.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the technical solution of the utility model is described in detail.Wherein phase
Same components are presented with like reference characters.It should be noted that word "front", "rear" used in the following description,
"left", "right", "up" and "down" refer to that the direction in attached drawing, word "inner" and "outside" are referred respectively to towards or away from specific
The direction at component geometry center.
Embodiment one
As shown in Figure 1, fully-mechanized mining working Air return corner air ducting provided by the embodiment of the utility model includes: flexible oil
Cylinder 1, connecting rod 2 and for by the wind-guiding curtain 3 of distinguished and admirable guiding fully-mechanized mining working Air return corner, wind-guiding curtain 3 to be hung on connecting rod 2
On, the piston rod of telescopic oil cylinder 1 is fixedly connected with the first end of connecting rod 2, and telescopic oil cylinder 1 is connected by the flexible drive of piston rod
Extension bar 2 moves back and forth, to realize the expansion and contraction of wind-guiding curtain 3.
In use, can be mounted on telescopic oil cylinder 1 on the top beam of transition bracket 4, transition bracket 4 is used for supporting working face
The top plate in face and return aircourse junction.
As shown in Figure 1, the piston rod of control telescopic oil cylinder 1 stretches out under normal condition, connecting rod 2 is driven to move forward, by wind-guiding
Curtain 3 is unfolded, and by distinguished and admirable guiding Air return corner, increases the air quantity of Air return corner, the pernicious gas of Air return corner accumulation is discharged, really
Protect personnel safety.
As shown in Fig. 2, the piston rod of control telescopic oil cylinder 1 retracts when 6 coal cutting of coalcutter to transporter tail, drive
Connecting rod 2 moves back, and wind-guiding curtain 3 is shunk, it is ensured that coalcutter installation passes through transporter tail.When coalcutter leaves transporter tail
When, telescopic oil cylinder 1 drives connecting rod 2 to move forward, and wind-guiding curtain 3 is unfolded, by distinguished and admirable guiding Air return corner.In the present embodiment,
" preceding " refers to that, close to the direction of coal wall, " rear " refers to the direction far from coal wall.
Fully-mechanized mining working Air return corner air ducting provided by the embodiment of the utility model is by being hung on company for wind-guiding curtain
On extension bar, telescopic oil cylinder drives the mobile expansion and contraction for realizing wind-guiding curtain of connecting rod, is not influencing coalcutter normal work
In the case of, by distinguished and admirable guiding Air return corner, it is possible to increase the air quantity of Air return corner improves the discharge effect of pernicious gas in Air return corner
Rate, it is ensured that personnel safety improves operating safety factor；The air ducting building block is few, and structure is simple, and production cost is low, and
And installation requirement is low, adaptable while easy to operate, high reliablity.
Embodiment two
On the basis of the above embodiment 1, optionally, as illustrated in fig. 1 and 2, fully-mechanized mining working Air return corner air ducting
It further include slideway, piston rod and the connecting rod 2 of telescopic oil cylinder 1 are arranged in parallel, and the of the piston rod of telescopic oil cylinder 1 and connecting rod 2
One end is fixedly connected, and the second end of connecting rod 2 is arranged on slideway.The bootable connecting rod 2 of slideway is linearly slided, and is played
The effect of guiding, and slideway can also play the role of supporting linkage 2.In the present embodiment, slideway can be casing, can also
For semicircular pipe.
Further, fully-mechanized mining working Air return corner air ducting further includes multiple hanging rings 5, and wind-guiding curtain 3 passes through described more
A hanging ring 5 is hung in connecting rod 2, wherein and the nearest hanging ring 5 of second end apart from connecting rod 2 is fixed on slideway, away from
The nearest hanging ring 5 of first end from connecting rod 2 is fixedly connected with the end of piston rod.Wind-guiding curtain 3 is hung by hanging ring 5, and will
Both ends are fixed on wind-guiding curtain 3, can facilitate the expansion and contraction of wind-guiding curtain, improve the contraction and expansion efficiency of wind-guiding curtain, preferably
Realize that wind-guiding curtain is synchronous with piston rod.
Optionally, fully-mechanized mining working Air return corner air ducting further includes vertical bar 17, the vertical bar 17 respectively with piston rod
It is vertically connected with connecting rod 2, to guarantee that connecting rod 2 is synchronous with piston rod, improves the expansion of screen 3 and shrink efficiency.
Preferably, the wind-guiding curtain after expansion is close to close to the side of connecting rod first end with the coal wall of fully-mechanized mining working, it can
Prevent the distinguished and admirable gap between wind-guiding curtain and coal wall from flowing away, more effectively by distinguished and admirable guiding Air return corner, preferably improving has
The expulsion efficiency of poisonous gas and the oxygen content for improving Air return corner.
As shown in figure 3, for wind-guiding curtain Automatic-expanding and the contraction of realizing fully-mechanized mining working Air return corner air ducting, fully mechanized mining
Working face Air return corner air ducting further includes main control module, coal winning machine position detection module, feed liquor main line P, returns liquid supervisor
Road R, the first solenoid valve 7, second solenoid valve 8, the first two-position three-way valve 9 and the second two-position three-way valve 10, main control module respectively with
Coal winning machine position detection module, the first solenoid valve 7 and second solenoid valve 8 are electrically connected.
Wherein, feed liquor main line P includes the first branch 11 and second branch 12, and returning liquid main line R includes third branch 13
With the 4th branch 14；The first branch 11 is connect with the oil inlet of the oil inlet of the first solenoid valve 7 and second solenoid valve 8 respectively, the
The outlet of one solenoid valve 7 is connect with the control mouth of the first two-position three-way valve 9, the outlet of second solenoid valve 8 and the second two-bit triplet
The control mouth of valve 10 connects, and the oil return opening of the first solenoid valve 7 and second solenoid valve 8 is connect with third branch 13 respectively.
Second branch 12 connects with the oil inlet of the oil inlet of the first two-position three-way valve 9 and the second two-position three-way valve 10 respectively
It connects, the oil return opening of the first two-position three-way valve 9 and the second two-position three-way valve 10 is connect with the 4th branch 14 respectively, the first two-bit triplet
The outlet of valve 9 is connect with the first import of telescopic oil cylinder 1, the outlet of the second two-position three-way valve 10 and telescopic oil cylinder 1 second into
Mouth connection.
Coal winning machine position detection module, for detecting the position data of coalcutter and position data being sent to master control mould
Block；Main control module is used to receive position data and controls the first solenoid valve 7 and second solenoid valve 8 according to the position data received
Switch.
When coalcutter moves to transporter tail position, the position for the coalcutter that coal winning machine position detection module will test
It sets data and is sent to main control module, main control module opens the first solenoid valve 7 and closes second solenoid valve 8, the first two-position three-way valve 9
The piston rod of the first import fluid injection to telescopic oil cylinder 1, telescopic oil cylinder 1 is withdrawn, and connecting rod 2 is driven to move back, and control wind-guiding curtain 3 is received
Contracting, so that coalcutter passes through.
When coalcutter leaves transporter tail position, the position for the coalcutter that coal winning machine position detection module will test
Data are sent to main control module, and main control module opens second solenoid valve 8 and closes the first solenoid valve 7, the second two-position three-way valve 10
The piston rod of the second import fluid injection to telescopic oil cylinder 1, telescopic oil cylinder 1 stretches out, and connecting rod 2 is driven to move forward, so that wind-guiding curtain 3 is opened up
It opens, by distinguished and admirable guiding Air return corner.In the present embodiment, the first solenoid valve 7 and second solenoid valve 8 are all made of OHE solenoid valve, the
One two-position three-way valve 9 and the second two-position three-way valve 10 are all made of OHE two-position three-way valve.
In the utility model embodiment, main control module is side protection plate of hydraulic support control system, for example, the hydraulic branch of PM32
Frame face guard electrohydraulic control system.Main control module is using side protection plate of hydraulic support control system, it can be achieved that wind-guiding curtain and hydraulic branch
Frame face guard is unfolded and withdraws simultaneously, and more convenient coalcutter passes through transporter tail.
Further, in order to guarantee the stability of fully-mechanized mining working Air return corner air ducting, guarantee piston rod not self-unloading,
As shown in figure 3, fully-mechanized mining working Air return corner air ducting further includes bidirectional hydraulic lock 15, bidirectional hydraulic lock 15 is arranged first
The of the outlet of two-position three-way valve 9 and the first import of telescopic oil cylinder 1, the outlet of the second two-position three-way valve 10 and telescopic oil cylinder 1
On the connecting line of two imports.
Preferably, in order to improve the service life of fully-mechanized mining working Air return corner air ducting, it is ensured that telescopic oil cylinder overload
When be not damaged, fully-mechanized mining working Air return corner air ducting further includes safety valve 16, and safety valve 16 is in parallel with telescopic oil cylinder 1,
As shown in Figure 3.
Optionally, in order to guarantee the first solenoid valve and second solenoid valve steady operation, main control module passes through Ma jade-like stone driving plate
Control the opening and closing of the first solenoid valve 7 and second solenoid valve 8.
Embodiment three
The utility model embodiment also provides a kind of fully-mechanized mining working Air return corner Air System, such as Fig. 1 and 2 institute
Show comprising the fully-mechanized mining working Air return corner air ducting of transition bracket and above-described embodiment one or embodiment two, fully mechanized mining
The telescopic oil cylinder 1 of working face Air return corner air ducting is mounted on the top beam of transition bracket 4.
Optionally, slideway is also mountable on the top beam of transition bracket 4, can make the first end and second end position of connecting rod 2
In sustained height, the expansion and contraction of more convenient wind-guiding curtain.
Fully-mechanized mining working Air return corner Air System provided by the embodiment of the utility model is by being hung on company for wind-guiding curtain
On extension bar, telescopic oil cylinder drives the mobile expansion and contraction for realizing wind-guiding curtain of connecting rod, is not influencing coalcutter normal work
In the case of, by distinguished and admirable guiding Air return corner, it is possible to increase the air quantity of Air return corner improves the discharge effect of pernicious gas in Air return corner
Rate, it is ensured that personnel safety improves operating safety factor；The air ducting building block is few, and structure is simple, and production cost is low, and
And installation requirement is low, adaptable while easy to operate, high reliablity.
More than, the technical solution of the utility model is described in detail in conjunction with specific embodiments, it is described specific
Embodiment is used to help understand the thought of the utility model.Those skilled in the art are on the basis of the utility model specific embodiment
On the derivation made and modification also belong within scope of protection of the utility model.
Claims (10)
1. a kind of fully-mechanized mining working Air return corner air ducting characterized by comprising telescopic oil cylinder, connecting rod and for will
The wind-guiding curtain of distinguished and admirable guiding fully-mechanized mining working Air return corner, wind-guiding curtain are hung in connecting rod, the piston rod of telescopic oil cylinder and company
The first end of extension bar is fixedly connected, and telescopic oil cylinder is mobile by the flexible drive connecting rod of piston rod, to realize the exhibition of wind-guiding curtain
It opens and shrinks.
2. fully-mechanized mining working Air return corner air ducting as described in claim 1, which is characterized in that further include slideway, stretch
The piston rod of oil cylinder is arranged in parallel with connecting rod, and the second end of connecting rod is arranged on slideway.
3. fully-mechanized mining working Air return corner air ducting as claimed in claim 2, which is characterized in that it further include multiple hanging rings,
Wind-guiding curtain is hung in connecting rod by the multiple hanging ring, wherein the hanging ring fixed setting nearest apart from connecting rod second end
On slideway, the hanging ring nearest apart from connecting rod first end is fixedly connected with the end of piston rod.
4. fully-mechanized mining working Air return corner air ducting as claimed in claim 2, which is characterized in that it further include vertical bar, it is described
Vertical bar is vertical with piston rod and connecting rod respectively to be connect.
5. the fully-mechanized mining working Air return corner air ducting as described in claim 1-4 is any, which is characterized in that further include master control
Module, feed liquor main line, returns liquid main line, the first solenoid valve, second solenoid valve, the first two at coal winning machine position detection module
Triple valve and the second two-position three-way valve, main control module respectively with coal winning machine position detection module, the first solenoid valve and the second electromagnetism
Valve electrical connection,
Wherein, feed liquor main line includes the first branch and second branch, and returning liquid main line includes third branch and the 4th branch；The
One branch is connect with the oil inlet of the oil inlet of the first solenoid valve and second solenoid valve respectively, the outlet of the first solenoid valve and first
The control mouth of two-position three-way valve connects, and the outlet of second solenoid valve is connect with the control mouth of the second two-position three-way valve, the first electromagnetism
Valve and the oil return opening of second solenoid valve are connect with third branch respectively；
Second branch is connect with the oil inlet of the oil inlet of the first two-position three-way valve and the second two-position three-way valve respectively, and the first two
The oil return opening of triple valve and the second two-position three-way valve is connect with the 4th branch respectively, the outlet of the first two-position three-way valve and flexible oil
First import of cylinder connects, and the outlet of the second two-position three-way valve and the second import of telescopic oil cylinder connect；
Coal winning machine position detection module, for detecting the position data of coalcutter and position data being sent to main control module；It is main
Control module is used to receive position data and according to the opening of the position data control the first solenoid valve and second solenoid valve that receive
And closing.
6. fully-mechanized mining working Air return corner air ducting as claimed in claim 5, which is characterized in that main control module is hydraulic branch
Frame wall supporting panel control system.
7. fully-mechanized mining working Air return corner air ducting as claimed in claim 5, which is characterized in that further include bidirectional hydraulic
The outlet of the first two-position three-way valve and the first import of telescopic oil cylinder, the second two-position three-way valve is arranged in lock, bidirectional hydraulic lock
On the connecting line of outlet and the second import of telescopic oil cylinder.
8. fully-mechanized mining working Air return corner air ducting as claimed in claim 5, which is characterized in that it further include safety valve, peace
Full valve is in parallel with telescopic oil cylinder.
9. fully-mechanized mining working Air return corner air ducting as claimed in claim 5, which is characterized in that main control module passes through Ma jade-like stone
The opening and closing of driving plate control the first solenoid valve and second solenoid valve.
10. a kind of fully-mechanized mining working Air return corner Air System, which is characterized in that including transition bracket and such as claim 1-9
Any fully-mechanized mining working Air return corner air ducting, the telescopic oil cylinder installation of fully-mechanized mining working Air return corner air ducting
On transition bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820943266.3U CN208650895U (en) | 2018-06-19 | 2018-06-19 | Fully-mechanized mining working Air return corner air ducting and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820943266.3U CN208650895U (en) | 2018-06-19 | 2018-06-19 | Fully-mechanized mining working Air return corner air ducting and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208650895U true CN208650895U (en) | 2019-03-26 |
Family
ID=65780590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820943266.3U Active CN208650895U (en) | 2018-06-19 | 2018-06-19 | Fully-mechanized mining working Air return corner air ducting and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208650895U (en) |
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2018
- 2018-06-19 CN CN201820943266.3U patent/CN208650895U/en active Active
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