CN113027523A - Mining drainage equipment that possesses intelligent detection system - Google Patents
Mining drainage equipment that possesses intelligent detection system Download PDFInfo
- Publication number
- CN113027523A CN113027523A CN202110426056.3A CN202110426056A CN113027523A CN 113027523 A CN113027523 A CN 113027523A CN 202110426056 A CN202110426056 A CN 202110426056A CN 113027523 A CN113027523 A CN 113027523A
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- water
- detection
- detection system
- intelligent
- mining drainage
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Abstract
The invention discloses a mine drainage device with an intelligent detection system, which comprises a movable base, wherein an advancing mechanism is arranged on the movable base, a lifting mechanism is arranged on the advancing mechanism, a detection supporting rod extending outwards is arranged on the lifting mechanism, a detection shaft is arranged on the detection supporting rod upwards and downwards, a detection ring is sleeved outside the detection shaft, a telescopic mechanism is arranged at the lower end of the detection shaft downwards, one side of a water depth detection plate is connected with a water pumping device fixing plate, and a plurality of water pumping mechanisms are uniformly distributed on the water pumping device fixing plate along the axial direction of the detection shaft, and simple structure, simple to operate use more easily, adapt to fast according to the ditch degree of depth and erect.
Description
Technical Field
The invention relates to mine drainage pump equipment, in particular to mine drainage equipment with an intelligent detection system.
Background
The mining drainage pump is a modern engineering machine and is widely applied to railway tunnels, highway tunnels, mine excavation, water conservancy and underground engineering. The intelligent multi-stage mine drainage pump has very important significance for preventing water inrush of a mine and guaranteeing mine drainage safety, and the intelligent multi-stage mine drainage pump enables a mine drainage system to be safer and greatly improves drainage efficiency. With the continuous improvement of the requirements of safe construction and high-efficiency construction, the domestic and foreign drainage pump technology is continuously and iteratively upgraded. In underground construction, the mining drainage pump plays an increasingly greater role, and for practical engineering, the existing drainage pump cannot predict the water level of the drainage ditch or cannot predict the water level accurately, so that certain defects exist in the prevention of water inrush accidents under mines; in addition, the existing partial drainage pump cannot perform graded drainage, and a corresponding number of water pumps cannot be reasonably opened according to the water level of the drainage ditch, so that resource waste is caused, the economic benefit of a mine is damaged, and the waste of energy sources does not conform to the environment-friendly concept of green construction and sustainable development; partial multi-stage drainage pumps are complex in devices and inconvenient to install, so that workers are unskilled in installation or use of the drainage pumps, and potential safety hazards are caused.
As such, there is a need for further improvements in existing mining drain pump equipment.
Disclosure of Invention
The invention aims to provide the mining drainage equipment with the intelligent detection system, which can quickly erect drainage pump equipment, is more intelligent, can quickly detect the current water level, starts a corresponding horizontal height water pump, saves resources and reduces the construction cost of a mine.
In order to achieve the purpose, the invention adopts the following scheme:
a mining drainage device with an intelligent detection system comprises a movable base, wherein an advancing mechanism is arranged on the movable base, a lifting mechanism is arranged on the advancing mechanism, a detection supporting rod extending outwards is arranged on the lifting mechanism, a detection shaft is arranged on the detection supporting rod in an upward and downward mode, a detection ring is sleeved outside the detection shaft, a telescopic mechanism is arranged at the lower end of the detection shaft in a downward mode, a water depth detection plate is arranged at the output end below the telescopic mechanism, a distance detection device arranged in the direction of the detection ring is arranged on the water depth detection plate, a water pumping device fixing plate is connected to one side of the water depth detection plate, a plurality of water pumping mechanisms are uniformly distributed on the water pumping device fixing plate along the axis direction of the detection shaft, a plurality of grading switches are connected to the water pumping mechanisms respectively, and a data processing controller is arranged on the movable base, the distance detection device is in communication connection with the data processing controller, and the data processing controller is in communication connection with the plurality of grading switches respectively.
Further, the movable base comprises a movable bottom plate, and a plurality of movable wheels are arranged on the movable bottom plate.
Furthermore, the advancing mechanism comprises a longitudinal electric slide rail arranged on the movable base, and a slide support plate is movably arranged on the electric slide rail.
Furthermore, elevating system is in including vertical setting a plurality of guide bars of sliding support plate upper surface, and the activity sets up the removal portion of sliding support plate top, be provided with in the removal portion a plurality ofly with guide bar matched with guiding hole, a plurality of the guide bar upper end is provided with the connection roof, the last vertical drive lead screw that is provided with of sliding support plate, be provided with the screw in the removal portion, the drive lead screw pass the screw and with screw threaded connection.
Furthermore, the pumping mechanism is including setting up water inlet on the pumping device fixed plate sets up the water pumper on the mobile base, the entrance point of water pumper with be provided with the raceway intercommunication between the water inlet.
Furthermore, be provided with out the water end on the water pumper, be provided with the output water main on the removal base, it is a plurality of go out the water end respectively with the setting of output water main intercommunication.
Furthermore, the grading switch is an electromagnetic valve, the distance detection device is a laser measuring instrument, and the data processing controller is capable of being controlled in an editing mode.
Furthermore, a flow calculation module is arranged on the output water main and is in communication connection with the display terminal.
Furthermore, a monitoring device is arranged on the mobile base and is in communication connection with the display terminal.
Furthermore, a GPS positioning device for positioning the current equipment position is arranged on the mobile base; the mobile base is provided with a signal transmitting device, and the data processing controller is in communication connection with the signal transmitting device.
In summary, compared with the prior art, the invention has the beneficial effects that:
the invention solves the defects of the existing mine drainage system, and has the advantages of quickly erecting drainage equipment, saving working time and labor force, intelligently and hierarchically pumping water in the mine drainage system according to the water level, greatly saving resources, reducing unnecessary electric energy waste, having simple structure, convenient installation and easier use, quickly adapting to erection according to the depth of a ditch, and reducing the danger of manual erection.
Drawings
FIG. 1 is one of the perspective views of the present invention;
FIG. 2 is a second perspective view of the present invention;
FIG. 3 is a schematic view of the present invention;
FIG. 4 is a second schematic view of the present invention;
FIG. 5 is a top view of the present invention;
fig. 6 is a front view of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to FIGS. 1-6, the present invention provides
A mining drainage device with an intelligent detection system comprises a movable base 1, wherein an advancing mechanism 2 is arranged on the movable base 1, a lifting mechanism 3 is arranged on the advancing mechanism 2, a detection support rod 4 extending outwards is arranged on the lifting mechanism 3, a detection shaft 5 is arranged on the detection support rod 4 in a downward direction, a detection ring 6 is sleeved outside the detection shaft 5, a telescopic mechanism 7 is arranged at the lower end of the detection shaft 5 in a downward direction, a water depth detection plate 8 is arranged at the output end below the telescopic mechanism 7, a distance detection device 9 arranged towards the direction of the detection ring 6 is arranged on the water depth detection plate 8, a water pumping device fixing plate 10 is connected to one side of the water depth detection plate 8, a plurality of water pumping mechanisms 11 are uniformly distributed on the water pumping device fixing plate 10 along the axial direction of the detection shaft 5, and a grading switch 12 is respectively connected to the water pumping mechanisms 11, a data processing controller 13 is arranged on the mobile base 1, the distance detection device 9 is in communication connection with the data processing controller 13, and the data processing controller 13 is in communication connection with the plurality of grading switches 12 respectively;
erecting and moving:
during erection, the advancing mechanism 2 is controlled to drive the lifting mechanism 3 to move forwards, so that the lifting mechanism 3 moves to the upper part of the ditch, at the moment, the lifting mechanism 3 is started, and the lifting mechanism 3 drives the distance detection device 9 to descend to the bottom of the ditch, so that early erection is completed;
when the equipment moves, the lifting mechanism 3 drives the distance detection device 9 to ascend and reset, meanwhile, the advancing mechanism 2 drives the lifting mechanism 3 to move backwards and reset, the storage work is completed, and the movable base 1 can be controlled to change the position at the moment.
The detection principle is as follows:
the distance detection device 9 moves to the bottom of the lifting mechanism 3, the detection ring 6 has buoyancy, the density is smaller than that of water, the detection ring 6 floats on the surface of the water, the distance detection device 9 transmits a signal to the lower surface of the detection ring 6, the distance between the current detection ring 6 and the detection ring is detected, the detected information is sent to the data processing controller 13, the data processing controller 13 converts the signal into corresponding parameters according to the proportion, each pumping mechanism 11 has different parameter ranges, when the converted parameters exceed the parameter ranges of the pumping mechanisms 11 at the corresponding positions, the grading switches 12 on the corresponding pumping mechanisms 11 are turned on, and the corresponding pumping mechanisms 11 perform pumping work after the grading switches 12 are turned on; the higher the water level is, the more the number of the pumping mechanisms 11 is opened from the bottom to the top.
The method can also comprise the following steps:
the first step is as follows: the drainage pump is installed in the mine drainage ditch, whether the equipment runs normally or not is checked, whether the distance detection device 9 measures accurately or not, whether the data processing controller 13 breaks down or not, whether the intelligent grading switch is normally switched or not and whether the water pump works normally or not are checked.
The second step is that: after the detection is correct, the industrial power supply is switched on to start running, the distance detection device 9 measures the water level of the drainage ditch at the moment, and the data processing controller 13 starts to calculate the water level h.
The third step: when the water level H calculated by the data processing controller 13 reaches one-fourth of the drain height H, that is, H is 1/4H, the classification switch 12 corresponding to the water level is turned on to operate the water pumping mechanism 11 corresponding to the water level, and the classification switch 12 is turned off when the water level H is lower than 1/4H.
The fourth step: when the water level H calculated by the data processing controller 13 reaches one-half of the drain height H, that is, H is 1/2H, the classification switch 12 corresponding to the water level is opened to start the operation of the water pumping mechanism 11 corresponding to the water level, and if the water level H is lower than 1/2H, the classification switch 12 is closed, and the water pumping mechanism 11 is still operated.
The fifth step: when the water level H calculated by the data processing controller 13 reaches three-fourths of the height H of the drainage ditch, that is, H is 3/4H, the classification switch 12 corresponding to the water level is opened, so that the water pumping mechanism 11 corresponding to the water level starts to work;
and a sixth step: when the water level H calculated by the data processing controller 13 reaches three-fourths of the drainage ditch height H, namely H is 3/4H, the intelligent early warning device 120 sounds, the GPS positioning device determines the position of the drainage pump, and the 5G mine intelligent signal system gives an alarm to the control room to feed back the real-time water level H and sends the position of the drainage pump.
And a sixth step: the control room can remotely control the working operation of the drainage pump through a 5G mine intelligent signal system.
The movable base 1 of the present invention comprises a movable bottom plate 101, and a plurality of movable wheels 102 are disposed on the movable bottom plate 101.
The advancing mechanism 2 comprises a longitudinal electric slide rail 201 arranged on the movable base 1, and a slide support plate 202 is movably arranged on the electric slide rail 201.
The lifting mechanism 3 comprises a plurality of guide rods 301 vertically arranged on the upper surface of the sliding support plate 202, and a moving part 302 movably arranged above the sliding support plate 202, wherein a plurality of guide holes matched with the guide rods 301 are formed in the moving part 302, a connecting top plate 303 is arranged at the upper ends of the guide rods 301, a driving screw rod 304 is vertically arranged on the sliding support plate 202, a screw hole 305 is formed in the moving part 302, and the driving screw rod 304 penetrates through the screw hole 305 and is in threaded connection with the screw hole 305.
The water pumping mechanism 11 of the present invention comprises a water inlet 111 disposed on the water pumping device fixing plate 10, and a water pump 112 disposed on the movable base 1, wherein a water pipe 113 is disposed between an inlet end of the water pump 112 and the water inlet 111 for communication.
The water pump 112 of the present invention is provided with a water outlet 200, the movable base 1 is provided with an output water main 100, and the water outlet 200 is respectively communicated with the output water main 100.
The grading switch 12 is an electromagnetic valve, the distance detection device 9 is a laser measuring instrument, and the data processing controller 13 is editable and controllable.
The output water main 100 is provided with a flow calculation module 300, and the flow calculation module 300 is connected with a display terminal in a communication way;
the display terminal is used for displaying the numerical value of the total water flow of the output water main 100 calculated by the flow calculation module 300.
The mobile base 1 is provided with a monitoring device 400, and the monitoring device 400 is in communication connection with a display terminal;
the monitoring device 400 facilitates detection of the current state of the mine.
The mobile base 1 is provided with a GPS positioning device for positioning the current equipment position; the mobile base 1 is provided with a signal transmitting device, and the data processing controller 13 is in communication connection with the signal transmitting device;
the driving motor, the elevating mechanism 3, the extending and contracting mechanism 7, and the water pump 112 are provided with an electrostatic unit 199 for eliminating sound.
The mining drainage pump is a modern engineering machine and is widely applied to railway tunnels, highway tunnels, mine excavation, water conservancy and underground engineering. The intelligent multi-stage mine drainage pump has very important significance for preventing water inrush of a mine and guaranteeing mine drainage safety, and the intelligent multi-stage mine drainage pump enables a mine drainage system to be safer and greatly improves drainage efficiency. With the continuous improvement of the requirements of safe construction and high-efficiency construction, the domestic and foreign drainage pump technology is continuously and iteratively upgraded. In underground construction, mining drain pumps play an increasing role.
For practical engineering, the existing drainage pump cannot predict the water level of a drainage ditch or cannot predict the water level accurately, and certain defects exist in the prevention of water inrush accidents under mines; in addition, the existing partial drainage pump cannot perform graded drainage, and a corresponding number of water pumps cannot be reasonably opened according to the water level of the drainage ditch, so that resource waste is caused, the economic benefit of a mine is damaged, and the waste of energy sources does not conform to the environment-friendly concept of green construction and sustainable development; part multistage drain pump, the device is more complicated, the installation is not convenient, leads to the workman to the drain pump installation or use unskilled, cause the potential safety hazard, and can't carry out remote control, intelligent early warning, when leading to the water inrush accident to take place, can't discover the accident source the very first time, leads to missing the best opportunity of remedying.
The product fully considers the construction requirement, utilizes the measuring instrument, realizes the accurate measurement of the water level, realizes intelligent graded pumping and intelligent early warning energy saving waste through the data processor and the intelligent grading switch, improves the efficiency and the safety of a drainage system, and reduces the water inrush accidents of a mine.
Meanwhile, the method has the characteristics of intelligent, unmanned and environment-friendly construction, meets the national sustainable development requirements, has important practical significance on unmanned, intelligent and environment-friendly mining engineering and tunnel engineering, and has great development prospect at home and abroad
While there have been shown and described the fundamental principles and principal features of the invention and advantages thereof, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are given by way of illustration of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a mining drainage equipment that possesses intelligent detecting system, includes mobile base (1), its characterized in that: the water-depth detection device is characterized in that an advancing mechanism (2) is arranged on the movable base (1), a lifting mechanism (3) is arranged on the advancing mechanism (2), a detection support rod (4) extending outwards is arranged on the lifting mechanism (3), a detection shaft (5) is arranged on the detection support rod (4) in an upward and downward direction, a detection ring (6) is sleeved outside the detection shaft (5), a telescopic mechanism (7) is arranged at the lower end of the detection shaft (5) downwards, a water-depth detection plate (8) is arranged at the output end below the telescopic mechanism (7), a distance detection device (9) arranged towards the direction of the detection ring (6) is arranged on the water-depth detection plate (8), a water pumping device fixing plate (10) is connected to one side of the water-depth detection plate (8), and a plurality of water pumping mechanisms (11) are uniformly distributed on the water pumping device fixing plate (10) along, a plurality of the pumping mechanism (11) is connected with a grading switch (12), the mobile base (1) is provided with a data processing controller (13), the distance detection device (9) is in communication connection with the data processing controller (13), and the data processing controller (13) is in communication connection with the grading switches (12) respectively.
2. The mining drainage device with the intelligent detection system according to claim 1, characterized in that: the movable base (1) comprises a movable bottom plate (101), and a plurality of movable wheels (102) are arranged on the movable bottom plate (101).
3. The mining drainage device with the intelligent detection system according to claim 1, characterized in that: the advancing mechanism (2) comprises a longitudinal electric slide rail (201) arranged on the movable base (1), and a sliding support plate (202) is movably arranged on the electric slide rail (201).
4. The mining drainage device with the intelligent detection system according to claim 3, wherein: elevating system (3) is including vertical setting a plurality of guide bar (301) of sliding support board (202) upper surface, and the activity sets up removal portion (302) of sliding support board (202) top, be provided with on removal portion (302) a plurality ofly with guide bar (301) matched with guiding hole, it is a plurality of guide bar (301) upper end is provided with connection roof (303), vertical driving screw pole (304) that is provided with on sliding support board (202), be provided with screw (305) on removal portion (302), driving screw pole (304) are passed screw (305) and with screw (305) threaded connection.
5. The mining drainage device with the intelligent detection system according to claim 1, characterized in that: the water pumping mechanism (11) comprises a water inlet (111) arranged on the water pumping device fixing plate (10) and a water pump (112) arranged on the movable base (1), and a water conveying pipe (113) is arranged between the inlet end of the water pump (112) and the water inlet (111) and communicated with each other.
6. The mining drainage device with the intelligent detection system according to claim 5, wherein: be provided with out water end (200) on water pumper (112), be provided with output water main (100) on the removal base (1), it is a plurality of go out water end (200) respectively with output water main (100) intercommunication sets up.
7. The mining drainage device with the intelligent detection system according to claim 1, characterized in that: the grading switch (12) is an electromagnetic valve, the distance detection device (9) is a laser measuring instrument, and the data processing controller (13) is editable and controllable.
8. The mining drainage device with the intelligent detection system of claim 6, wherein: the output water main (100) is provided with a flow calculation module (300), and the flow calculation module (300) is in communication connection with a display terminal.
9. The mining drainage device with the intelligent detection system according to claim 7, wherein: the mobile base (1) is provided with a monitoring device (400), and the monitoring device (400) is in communication connection with the display terminal.
10. The mining drainage device with the intelligent detection system according to any one of claims 1 to 9, wherein: a GPS positioning device for positioning the current equipment position is arranged on the mobile base (1); the mobile base (1) is provided with a signal transmitting device, and the data processing controller (13) is in communication connection with the signal transmitting device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426056.3A CN113027523B (en) | 2021-04-20 | 2021-04-20 | Mining drainage equipment with intelligent detection system |
| CN202310514619.3A CN116575981A (en) | 2021-04-20 | 2021-04-20 | Drainage method based on mining drainage equipment with intelligent detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110426056.3A CN113027523B (en) | 2021-04-20 | 2021-04-20 | Mining drainage equipment with intelligent detection system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310514619.3A Division CN116575981A (en) | 2021-04-20 | 2021-04-20 | Drainage method based on mining drainage equipment with intelligent detection system |
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| Publication Number | Publication Date |
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| CN113027523A true CN113027523A (en) | 2021-06-25 |
| CN113027523B CN113027523B (en) | 2023-05-16 |
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| CN202110426056.3A Active CN113027523B (en) | 2021-04-20 | 2021-04-20 | Mining drainage equipment with intelligent detection system |
| CN202310514619.3A Pending CN116575981A (en) | 2021-04-20 | 2021-04-20 | Drainage method based on mining drainage equipment with intelligent detection system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310514619.3A Pending CN116575981A (en) | 2021-04-20 | 2021-04-20 | Drainage method based on mining drainage equipment with intelligent detection system |
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| CN201851157U (en) * | 2010-10-19 | 2011-06-01 | 锦州重型水泵有限公司 | Pneumatic automatic drainage device for coal mine |
| CN103046957A (en) * | 2011-10-14 | 2013-04-17 | 孟国营 | Rapidly installed automatic detection control and organization command system for mine rescue and drainage |
| CN204283495U (en) * | 2014-11-20 | 2015-04-22 | 国家电网公司 | The closed draining control cabinet in cable tunnel |
| CN104612980A (en) * | 2015-01-28 | 2015-05-13 | 深圳市钜泰泵业有限公司 | Automatic water level control water pump |
| CN204386649U (en) * | 2015-01-12 | 2015-06-10 | 温州乐控节能科技有限公司 | A kind of Mine Drainage System |
| CN204663577U (en) * | 2015-06-11 | 2015-09-23 | 滁州市西控电子有限公司 | The energy-conservation drainage control system of a kind of New Mine |
| CN110359956A (en) * | 2019-07-08 | 2019-10-22 | 洛阳中重自动化工程有限责任公司 | A kind of Discrete control method of the Mine Drainage System based on time-of-use tariffs |
| CN110966046A (en) * | 2019-12-19 | 2020-04-07 | 淮南市阶梯电子科技有限公司 | Ground remote monitoring system of mine drainage device |
| CN212368054U (en) * | 2020-05-20 | 2021-01-19 | 广州极飞科技有限公司 | Water level management equipment and farmland irrigation drainage system |
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2021
- 2021-04-20 CN CN202110426056.3A patent/CN113027523B/en active Active
- 2021-04-20 CN CN202310514619.3A patent/CN116575981A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201851157U (en) * | 2010-10-19 | 2011-06-01 | 锦州重型水泵有限公司 | Pneumatic automatic drainage device for coal mine |
| CN103046957A (en) * | 2011-10-14 | 2013-04-17 | 孟国营 | Rapidly installed automatic detection control and organization command system for mine rescue and drainage |
| CN204283495U (en) * | 2014-11-20 | 2015-04-22 | 国家电网公司 | The closed draining control cabinet in cable tunnel |
| CN204386649U (en) * | 2015-01-12 | 2015-06-10 | 温州乐控节能科技有限公司 | A kind of Mine Drainage System |
| CN104612980A (en) * | 2015-01-28 | 2015-05-13 | 深圳市钜泰泵业有限公司 | Automatic water level control water pump |
| CN204663577U (en) * | 2015-06-11 | 2015-09-23 | 滁州市西控电子有限公司 | The energy-conservation drainage control system of a kind of New Mine |
| CN110359956A (en) * | 2019-07-08 | 2019-10-22 | 洛阳中重自动化工程有限责任公司 | A kind of Discrete control method of the Mine Drainage System based on time-of-use tariffs |
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| CN212368054U (en) * | 2020-05-20 | 2021-01-19 | 广州极飞科技有限公司 | Water level management equipment and farmland irrigation drainage system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113027523B (en) | 2023-05-16 |
| CN116575981A (en) | 2023-08-11 |
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