CN116446943A - A quick closing device for colliery is in pit - Google Patents
A quick closing device for colliery is in pit Download PDFInfo
- Publication number
- CN116446943A CN116446943A CN202310410071.8A CN202310410071A CN116446943A CN 116446943 A CN116446943 A CN 116446943A CN 202310410071 A CN202310410071 A CN 202310410071A CN 116446943 A CN116446943 A CN 116446943A
- Authority
- CN
- China
- Prior art keywords
- air
- air bag
- pipe
- bag component
- curtain
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000003245 coal Substances 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 210000001503 joint Anatomy 0.000 claims abstract description 13
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 239000000696 magnetic material Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 230000005389 magnetism Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 20
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
- E21F17/12—Dam doors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a rapid sealing device for underground coal mine, which comprises: the air curtain, the air door arranged on the air curtain, the air bag component connected to the air curtain, the air charging pipe connected with the air blower and the air receiving pipe arranged on the air bag component and matched with the air charging pipe; the gasbag subassembly is provided with a plurality of, and nest layer by layer between a plurality of gasbag subassemblies, quick closing device still includes: a monitor; a transmission assembly; the air tightness of the air bag component is monitored through the monitor, when the air bag component is broken, the air tightness is reduced, the transmission component drives the air charging pipe to move to the air receiving pipe of the air bag component of the inner layer of the air bag component to be in butt joint and inflated, so that the air bag component in the use state can be monitored by using the inner air bag component in a running mode, if the air bag component is broken, the air bag component is inflated rapidly to replace the air bag component, the damaged sealing device is remedied, and the roadway is adjusted timely and blocked continuously.
Description
Technical Field
The invention particularly relates to the technical field of coal mine safety facilities, in particular to a rapid sealing device for underground coal mines.
Background
In recent years, with the integration of national coals, comprehensive mechanization is also applied to underground large scale, and the possibility and destructiveness of accidents occurring underground are also deepened to different degrees.
When sudden disaster accidents such as fire, explosion, toxic gas leakage and water permeation happen in the underground coal mine, the accident chain reaction can be blocked by using a method of filling the air bags to seal.
However, in practical application, the air bag is leaked due to the poor air tightness of certain parts or the influence of severe environment when the air bag is filled with air, and workers cannot find the situation in time or quickly remedy the damage situation, so that the tightness of the air bag is influenced, and the safety and property safety of underground personnel cannot be well ensured.
Disclosure of Invention
The invention aims to provide a rapid sealing device for underground coal mines, aiming at the defects of the prior art, so as to solve the technical problems that the leakage condition of an air bag cannot be monitored and the damage condition is remedied.
The aim of the invention can be achieved by the following technical scheme:
a rapid closure device for use downhole in a coal mine, comprising:
the air curtain, the air door arranged on the air curtain, the air bag component connected to the air curtain, the air charging pipe connected with the air blower and the air receiving pipe arranged on the air bag component and matched with the air charging pipe;
the air bag assembly is provided with a plurality of, and nest layer by layer between a plurality of air bag assemblies, a plurality of air bag assemblies respectively with a plurality of air pipes intercommunication that are fixed in on the air curtain, quick closing device still includes:
the monitors are respectively arranged on the airbag assemblies and are used for monitoring the air tightness of the airbag assemblies filled with air; and
the transmission assembly is arranged on the air curtain, and when the air tightness of the air bag assembly filled with air is monitored by the monitor to be reduced, the transmission assembly drives the air charging pipe to move to the air receiving pipe of the air bag assembly at the inner layer of the air bag assembly for butt joint and air charging.
As a further scheme of the invention: when the gas tube moves to the mouth of the gas tube, the sealing assembly is triggered to seal the gas tube and the gas tube.
As a further scheme of the invention: the containment assembly includes:
the fixing ring is fixed at the pipe orifice of the air charging pipe facing the air receiving pipe, and is made of magnetic materials, and the pipe orifice of the air charging pipe far away from the air receiving pipe is connected with the air blower; and
the movable ring is slidably arranged at the inner wall of the pipe orifice of the gas receiving pipe and is connected with the inner wall of the gas receiving pipe through an elastic piece, and the movable ring is made of magnetic materials and the magnetism of the movable ring is attracted with that of the fixed ring.
As a further scheme of the invention: the transmission assembly includes:
the gear is rotatably arranged on the air curtain and is driven to rotate by the driving source; and
the rack is slidably arranged on the air curtain and is fixedly connected with the air charging pipe.
As a further scheme of the invention: the air curtain is also provided with a protection component, and when the air charging pipe moves to the air receiving pipe of the innermost air bag component, the protection component is triggered to support the inner wall of the roadway.
As a further scheme of the invention: the air curtain is provided with a travel switch, and the travel switch is interfered with the inflation tube and is electrically connected with the protection component.
As a further scheme of the invention: the guard assembly includes:
the connecting rod is fixed on the air curtain;
the supporting plate is slidably arranged on the connecting rod and is driven to move by the output source; and
and the reinforcing ribs are fixed on the supporting plate and are used for forming a triangular structure on the supporting plate.
The invention has the beneficial effects that:
(1) According to the invention, the air tightness of the inflated air bag component is monitored through the monitor, when the air tightness is reduced due to the breakage of the inflated air bag component, the transmission component drives the air tube to move to the air receiving tube of the air bag component at the inner layer of the air bag component for butt joint and inflation, and the monitor in the air bag component is simultaneously controlled by the external controller to be opened for monitoring, so that the air bag component in a use state can be monitored by using the internal air bag component in a forward manner, and if the air bag component is broken, the other air bag component is inflated rapidly to realize replacement, the damaged sealing device is remedied, the roadway is adjusted and continuously blocked in time, the chain reaction of the disaster accident is cut off in time, and the safety of personnel and property is ensured to the greatest extent;
(2) In the invention, the magnetic attraction is matched with the elastic force to timely adjust the airtight state between the air charging pipe and the air receiving pipe; when the movable ring is driven by the driving component to move to a position aligned with the fixed ring, the movable ring can descend and butt against the fixed ring under the action of magnetic attraction, so that airtight butt joint between the inflation tube and the gas-receiving tube is realized, and after the movable ring is driven by the driving component to slide away from the fixed ring, the elastic force of the elastic piece for restoring deformation drives the movable ring to restore to an initial state;
(3) According to the invention, when the inflation tube triggers the travel switch, the external controller receives a signal of the travel switch, and then the supporting plate is controlled to slide, so that the supporting plate moves in a direction away from the connecting rod, namely, moves towards the inner wall of the roadway, and further supports the inner wall of the roadway, thereby improving the blocking effect on underground disaster areas of the coal mine.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the gas receiving tube in the present invention;
FIG. 3 is a schematic view of a partial enlarged structure at A of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic view of the structure of the guard assembly of the present invention;
fig. 5 is a schematic view of a partial enlarged structure at B of fig. 4 in the present invention.
In the figure: 1. a wind curtain; 2. a damper; 3. an airbag module; 301. a main air bag; 302. an auxiliary air bag; 4. an inflation tube; 5. a gas receiving pipe; 6. a transmission assembly; 601. a gear; 602. a rack; 7. a closing assembly; 701. a fixing ring; 702. a movable ring; 703. an elastic member; 8. a protective assembly; 801. a connecting rod; 802. a supporting plate; 803. reinforcing ribs; 9. a travel switch; 10. and a monitor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, the present invention is a rapid closing device for underground coal mine, comprising:
the air curtain 1, the air door 2 arranged on the air curtain 1, the air bag component 3 connected to the air curtain 1, the air charging pipe 4 connected with the air blower and the air receiving pipe 5 arranged on the air bag component 3 and matched with the air charging pipe 4;
the air bag components 3 are arranged in a plurality, the air bag components 3 are nested layer by layer, the air bag components 3 are respectively communicated with a plurality of air receiving pipes 5 fixed on the air curtain 1, and the quick sealing device further comprises:
a monitor 10, a plurality of the monitors 10 are respectively installed on the plurality of airbag modules 3 for monitoring the air tightness of the airbag modules 3 filled with air; and
the transmission assembly 6 is arranged on the air curtain 1, and when the monitor 10 monitors the air tightness decrease of the air-filled air bag assembly 3, the transmission assembly 6 drives the air charging pipe 4 to move to the air receiving pipe 5 of the air bag assembly 3 on the inner layer of the air bag assembly 3 for butt joint and air charging.
In one case of the embodiment, the air bag assembly 3 includes a main air bag 301 connected with the air curtain 1 and an auxiliary air bag 302 mounted on the main air bag 301, wherein the auxiliary air bag 302 is mounted at the edge of the main air bag 301, and the two air bags are in linear communication only at the edge, when the air bag assembly 3 is not saturated in inflation, the state, namely the orientation, of the auxiliary air bag 302 is adjusted in time, and the inner wall of a roadway is tightly blocked by using the skirt edge of the auxiliary air bag 302; the plurality of main air bags 301 are nested layer by layer and respectively correspond to the plurality of air receiving pipes 5.
The monitor 10 is connected to an external controller; the main air bag 301 and the auxiliary air bag 302 are provided with hooks for fixing the quick sealing device, the device is provided with a safety valve, and the external controller, the safety valve and the hooks are all in the prior art, and are not improved, so that the specific mechanical structure and the specific circuit structure of the main air bag 301 and the auxiliary air bag are not required to be disclosed, and the integrity of the main air bag is not affected.
In practical application, the air bag type rapid sealing device is sent to a sealing position, a roadway support and a roof are selected as far as possible, a place without pumping is selected to perform construction, sundries at the sealing place are properly cleaned, the central position of the support is found firstly, a hook of an air curtain 1 is hung on the support firstly, then a rope fastener of an air bag component 3 is hung on the hook of the air curtain 1, an air tube 4 is in butt joint with an air receiving tube 5 of the air bag component 3 positioned at the outermost layer, the air bag component 3 is inflated, the air bag component 3 can rapidly seal the roadway, chain reactions of disaster accidents are cut off timely, and safety of personnel and property is guaranteed to the greatest extent; when the inflated air bag component 3 is broken, the monitor 10 monitors that the air tightness is reduced, the external controller controls the transmission component 6 to drive the air tube 4 to move to the air receiving tube 5 of the air bag component 3 at the inner layer of the air bag component 3 for butt joint and inflation, namely, the new air bag component 3 is realized to replace the broken air bag component 3 rapidly, and the monitor 10 in the air bag component is controlled to be opened by the external controller for monitoring, so that the air bag component 3 in a use state can be monitored by using the internal air bag component 3 smoothly, and if the air bag component is broken, the other air bag component 3 is inflated rapidly to realize replacement, the broken sealing device is regulated in time and the roadway is blocked continuously, and the loss of disaster accidents to people, machines and environments is reduced to the maximum extent; rescue workers can enter the disaster area through the damper 2.
As shown in fig. 1-3, as a preferred embodiment of the present invention, when the gas tube 4 moves to the pipe orifice of the gas receiving pipe 5, the sealing assembly 7 is triggered to seal between the gas tube 4 and the gas receiving pipe 5.
In one case of the present embodiment, the closing assembly 7 includes:
the fixing ring 701 is fixed at the pipe orifice of the air charging pipe 4 facing the air receiving pipe 5, the fixing ring 701 is made of magnetic material, and the pipe orifice of the air charging pipe 4 far away from the air receiving pipe 5 is connected with the blower; and
the movable ring 702 is slidably mounted on the inner wall of the pipe orifice of the gas receiving pipe 5 and is connected with the inner wall of the gas receiving pipe 5 through an elastic member 703, and the movable ring 702 is made of a magnetic material, and the magnetism of the movable ring is attracted with that of the fixed ring 701.
In practical application, the elastic member 703 may be a spring as shown in fig. 3, or may be replaced by other elastic members, such as a silica gel column, a spring plate, etc., which is not specifically limited in this embodiment; in the initial state, the movable ring 702 is positioned in the pipe orifice of the gas receiving pipe 5 and does not interfere with the fixed ring 701; when the movable ring 702 is driven by the driving assembly 6 to move to a position aligned with the fixed ring 701, the movable ring 702 can descend and butt against the fixed ring 701 under the action of magnetic attraction between the movable ring 702 and the fixed ring 701, so that airtight butt joint between the inflation tube 4 and the gas receiving tube 5 can be realized, and the elastic piece 703 is deformed at the moment; when the movable ring 702 slides away from the fixed ring 701 by the transmission assembly 6, the elastic force of the elastic member 703 restoring deformation drives the movable ring 702 to restore to the original state, i.e. the movable ring 702 is accommodated in the orifice of the gas receiving pipe 5.
Of course, the contact surface of the fixed ring 701 and the movable ring 702 may be provided with a bevel to facilitate the movable ring 702 to slide away from the fixed ring 701 and release the butt joint therebetween.
As shown in fig. 1-2, as a preferred embodiment of the present invention, the transmission assembly 6 includes:
a gear 601 rotatably mounted on the air curtain 1 and driven to rotate by a driving source; and
the rack 602 is slidably mounted on the air curtain 1 and fixedly connected with the air charging tube 4.
In one case of the present embodiment, the driving source may be a motor assembly, or may be a gear assembly or a pulley assembly driven by a motor, so long as the gear 601 can be rotated, and the present embodiment is not specifically limited herein.
In practical application, when the monitor 10 monitors that the air tightness in the air bag assembly 3 in full-air use is reduced, a signal is sent to an external controller, and the external controller controls a driving source to drive the gear 601 to rotate so as to drive the rack 602 to slide, so that the air tube 4 moves to replace the air receiving tube 5 in butt joint with the air tube 4; it should be noted that, in the present invention, the direction in which the rack 602 drives the air tube 4 to move is the direction from the air receiving tube 5 corresponding to the outermost layer air bag module 3 to the air receiving tube 5 corresponding to the innermost layer air bag module 3, that is, in the initial state, the outermost layer air bag module 3 is inflated first, and after the air bag module is damaged, the outermost layer air bag module 3 inside the air bag module begins to be inflated, so that the air bag module 3 can be inflated quickly for replacement when the air bag module 3 is damaged, thereby realizing the remedy of the sealing device.
As shown in fig. 1 to 5, as a preferred embodiment of the present invention, the air curtain 1 is further provided with a protection component 8, and when the air tube 4 moves to the air receiving tube 5 of the air bag component 3 at the innermost layer, the protection component 8 is triggered to support the inner wall of the roadway.
In one case of this embodiment, a travel switch 9 is provided on the air curtain 1, and the travel switch 9 interferes with the air charging tube 4 and is electrically connected with the protection component 8.
Of course, the travel switch 9 is connected with an external controller, and the travel switch 9 and the external controller are all in the prior art, and are not improved in the present application, so that specific mechanical structures and circuit structures of the travel switch 9 and the external controller do not need to be disclosed, and the integrity of the present application is not affected.
In the practical application of the present embodiment, in the initial state, the protection component 8 is not used, so as to avoid blocking the inner wall of the roadway by the outer layer air bag component 3; when the gas tube 4 moves to the gas receiving tube 5 of the air bag component 3 at the innermost layer, the gas tube 4 triggers the travel switch 9, and the protection component 8 is started to further support the inner wall of the roadway, so that the blocking effect on the underground disaster area of the coal mine is improved.
As shown in fig. 5, as a preferred embodiment of the present invention, the protection assembly 8 includes:
a connecting rod 801 fixed to the air curtain 1;
a stay plate 802 slidably mounted on the connection bar 801 and driven to move by an output source; and
reinforcing ribs 803 fixed to the stay plate 802 for forming a triangle structure on the stay plate 802.
In one case of this embodiment, the output source may be a hydraulic cylinder, an air cylinder, or other mechanisms capable of implementing linear motion, which is not specifically limited herein.
In practical application, when the inflation tube 4 triggers the travel switch 9, the external controller receives the signal of the travel switch 9, and then controls the supporting plate 802 to slide, so that the supporting plate 802 moves away from the connecting rod 801, namely moves towards the inner wall of the roadway and supports the inner wall of the roadway; the triangular structure formed by the reinforcing ribs 803 can effectively improve the supporting strength of the supporting plate 802.
The working principle of the invention is as follows: the embodiment of the invention provides a rapid sealing device for underground coal mines, which is characterized in that an air tube 4 is in butt joint with an air receiving tube 5 of an air bag module 3 positioned at the outermost layer, and the air bag module 3 is inflated, so that the air bag module 3 can rapidly seal a roadway; when the inflatable airbag module 3 breaks, the monitor 10 monitors that the air tightness is reduced, the external controller controls the transmission module 6 to drive the air tube 4 to move to the air receiving tube 5 of the airbag module 3 at the inner layer of the airbag module 3 to be in butt joint and inflated, so that the new airbag module 3 can replace the broken airbag module 3 rapidly, the monitor 10 in the air bag module is simultaneously controlled by the external controller to be opened for monitoring, the airbag module 3 in a use state can be monitored by using the internal airbag module 3 smoothly, if the air bag module is broken, the other airbag module 3 is inflated rapidly to realize replacement, the damaged sealing device is regulated timely and the roadway is blocked continuously, the loss of disasters to people, machines and environments is reduced to the maximum extent, the chain reaction of the disasters is cut off timely, and the safety of personnel and property is guaranteed to the maximum extent.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (7)
1. A rapid closure device for use downhole in a coal mine, comprising:
the air curtain (1), an air door (2) arranged on the air curtain, an air bag component (3) connected to the air curtain (1), an air charging pipe (4) connected with a blower, and an air receiving pipe (5) arranged on the air bag component (3) and matched with the air charging pipe (4);
the quick sealing device is characterized in that a plurality of air bag assemblies (3) are arranged, the air bag assemblies (3) are nested layer by layer, the air bag assemblies (3) are respectively communicated with a plurality of air receiving pipes (5) fixed on the air curtain (1), and the quick sealing device further comprises:
a plurality of monitors (10), each of the monitors (10) being mounted on a plurality of airbag modules (3) for monitoring the air tightness of the airbag module (3) filled with air; and
the transmission assembly (6) is arranged on the air curtain (1), and when the air tightness of the air bag assembly (3) filled with air is monitored by the monitor (10), the transmission assembly (6) drives the air charging pipe (4) to move to the air receiving pipe (5) of the air bag assembly (3) at the inner layer of the air bag assembly (3) for butt joint and air charging.
2. A rapid closing device for underground coal mine according to claim 1, wherein the closing assembly (7) is triggered to close the space between the gas tube (4) and the gas tube (5) when the gas tube (4) moves to the mouth of the gas tube (5).
3. A rapid closing device for a coal mine downhole according to claim 2, wherein the closing assembly (7) comprises:
the fixing ring (701) is fixed at the pipe orifice of the air charging pipe (4) facing the air receiving pipe (5), the fixing ring (701) is made of magnetic materials, and the pipe orifice of the air charging pipe (4) far away from the air receiving pipe (5) is connected with the air blower; and
the movable ring (702) is slidably arranged on the inner wall of the pipe orifice of the gas receiving pipe (5) and is connected with the inner wall of the gas receiving pipe (5) through an elastic piece (703), and the movable ring (702) is made of magnetic materials and the magnetism of the movable ring is attracted with that of the fixed ring (701).
4. A quick closing device for use downhole in coal mines according to claim 1, wherein the transmission assembly (6) comprises:
a gear (601) rotatably mounted on the air curtain (1) and driven to rotate by a driving source; and
the rack (602) is slidably arranged on the air curtain (1) and is fixedly connected with the air charging pipe (4).
5. The rapid closing device for underground coal mine according to claim 1, wherein the air curtain (1) is further provided with a protection component (8), and when the air charging pipe (4) moves to the air receiving pipe (5) of the innermost air bag component (3), the protection component (8) is triggered to support the inner wall of the roadway.
6. The rapid closing device for underground coal mine according to claim 5, wherein a travel switch (9) is arranged on the air curtain (1), and the travel switch (9) is interfered with the air charging tube (4) and is electrically connected with the protection assembly (8).
7. A quick closing device for use downhole in coal mines according to claim 5, wherein the protective assembly (8) comprises:
a connecting rod (801) fixed on the air curtain (1);
a stay plate (802) slidably mounted on the tie bar (801) and driven to move by an output source; and
and the reinforcing ribs (803) are fixed on the supporting plate (802) and are used for forming a triangular structure on the supporting plate (802).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310410071.8A CN116446943A (en) | 2023-04-18 | 2023-04-18 | A quick closing device for colliery is in pit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310410071.8A CN116446943A (en) | 2023-04-18 | 2023-04-18 | A quick closing device for colliery is in pit |
Publications (1)
Publication Number | Publication Date |
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CN116446943A true CN116446943A (en) | 2023-07-18 |
Family
ID=87125154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202310410071.8A Pending CN116446943A (en) | 2023-04-18 | 2023-04-18 | A quick closing device for colliery is in pit |
Country Status (1)
Country | Link |
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CN (1) | CN116446943A (en) |
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2023
- 2023-04-18 CN CN202310410071.8A patent/CN116446943A/en active Pending
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