CN111287791A - Drainage device is used in coal mining convenient to installation and removal - Google Patents
Drainage device is used in coal mining convenient to installation and removal Download PDFInfo
- Publication number
- CN111287791A CN111287791A CN201811497385.1A CN201811497385A CN111287791A CN 111287791 A CN111287791 A CN 111287791A CN 201811497385 A CN201811497385 A CN 201811497385A CN 111287791 A CN111287791 A CN 111287791A
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- Prior art keywords
- plate
- rod
- movable
- drainage device
- coal mining
- 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
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- 239000003245 coal Substances 0.000 title claims abstract description 26
- 238000005065 mining Methods 0.000 title claims abstract description 21
- 238000009434 installation Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000001179 sorption measurement Methods 0.000 claims abstract description 24
- 239000002893 slag Substances 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Images
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
- E21F16/00—Drainage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/20—Filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
- F16L3/20—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a coal mine drainage device convenient to install and move, which comprises a base main body, a water pump, a worm and an installation rod, wherein the water pump is installed on the left side above the base main body, a treatment chamber is fixed on the right side of the water pump, an adsorption plate is installed inside the treatment chamber, a slag outlet is fixed below the right side of the treatment chamber, a containing plate is arranged on the right side of the slag outlet, a through hole is installed inside the containing plate, a drainage pipe penetrates through the inside of the through hole, and the top end of the drainage pipe penetrates through a movable plate to be connected with a filter plate. This coal mining adopts drainage device convenient to installation and removal is provided with the bracing piece, and bracing piece self constitutes extending structure through the loose axle, and then the extending structure through the bracing piece is convenient for drive the drain pipe and gets into different positions and use to need not remove whole device, alleviateed staff's work load, increased the application range of whole device.
Description
Technical Field
The invention relates to the technical field of coal mines, in particular to a coal mining drainage device convenient to install and move.
Background
Coal mines are a general term for a series of activities generated in the coal mining process, accumulated water is generated in a local area of a mining area due to low-lying or more precipitation, and the safety of the coal mining area is reduced if the accumulated water is not discharged in time, so that a drainage device for coal mine exploitation is provided in the market, although the drainage device for coal mine exploitation in the current market is various in types, the defects exist, for example, when the drainage device for coal mine exploitation is required to drain water in different positions, the whole device needs to be moved, so that the workload of workers is increased, the drainage pipe is generally directly contacted with the drainage area or the drainage pipe is held by the workers, the drainage pipe and the drainage area are inconvenient to install and fix, and the top end of the drainage pipe is easy to block in the drainage process, meanwhile, accumulated water cannot be treated, so that the accumulated water easily pollutes the interior of the water pump, and therefore the problem that the drainage device for coal mining can well solve and is convenient to install and move is provided.
Disclosure of Invention
The invention aims to provide a drainage device for coal mining, which is convenient to install and move, and aims to solve the problems that the traditional drainage device for coal mining in the market is inconvenient to move, cannot be well installed and fixed, is easy to block the top end of a drainage pipe in the drainage process, cannot treat accumulated water and is easy to pollute the interior of a water pump, and the prior art provides the drainage device for coal mining, which is convenient to install and move.
In order to achieve the purpose, the invention provides the following technical scheme: a coal mining drainage device convenient to mount and move comprises a base main body, a water pump, a worm and a mounting rod, wherein the water pump is mounted on the left side above the base main body, a treatment chamber is fixed on the right side of the water pump, an adsorption plate is mounted inside the treatment chamber, a slag outlet is fixed below the right side of the treatment chamber, a storage plate is arranged on the right side of the slag outlet, a through hole is mounted inside the storage plate, a drain pipe penetrates through the inside of the through hole, the top end of the drain pipe penetrates through a movable plate and is connected with a filter plate, a movable plate penetrates through the outer side of the worm, a groove is mounted inside the movable plate, a dismounting rod is connected to the left side of the movable plate, a fixed groove is arranged on the left side of the dismounting rod, the base main body is mounted on the outer side of the fixed groove, the movable plate is fixed at the right end of the mounting rod, the movable shaft runs through and is connected with the bracing piece in the installation pole, and the left end of bracing piece installs the dead lever, the inside cardboard that is fixed with in the right side of accomodating the board, and both ends install the draw-in groove about the cardboard, the inside of recess is provided with the carriage release lever, and the outside of carriage release lever runs through and is connected with the installation awl in worm wheel and limiting plate to the outside meshing of worm wheel has the worm, the stopper is installed to the bottom of worm wheel, and the bottom of stopper is provided with the spacing groove to the limiting plate is installed to the bottom of spacing groove.
Preferably, the cross section of the adsorption plate is W-shaped, a gap is formed between the rightmost end of the adsorption plate and the inner wall of the processing chamber, and the inside of the adsorption plate has a mesh structure.
Preferably, the movable plate is connected with the detachable rod through a bearing, the lowest point of the movable plate is higher than the lowest point of the base body, and the movable plate is connected with the fixed groove through a thread.
Preferably, the clamping plate and the clamping groove are of an integral structure, the cross section of the clamping plate is I-shaped, and the clamping plates are distributed in the accommodating plate at equal intervals.
Preferably, the movable rod is connected with the mounting cone in a welding mode, and the movable rod is connected with the worm wheel in a threaded mode.
Preferably, the support rod forms a telescopic structure through the movable shaft, the central line of the support rod and the central line of the base body are on the same straight line, and the right end of the base body is in an open shape.
Compared with the prior art, the invention has the beneficial effects that: the coal mining drainage device convenient to install and move is adopted;
(1) the support rod is arranged, the support rod forms a telescopic structure through the movable shaft, and the telescopic structure of the support rod is convenient for driving the drain pipe to enter different positions for use, so that the whole device does not need to be moved, the workload of workers is reduced, and the use range of the whole device is enlarged;
(2) the mounting cone is driven to descend by descending of the moving rod, so that the mounting cone is fixed with a working area conveniently, the moving plate is convenient to drive the top end of the drain pipe to be fixed, and the drain pipe can well drain water;
(3) the filter plate is fixed, the filter plate is welded with the top end of the drain pipe, so that the drain pipe is well filtered through a mesh structure in the filter plate, and the drain pipe is prevented from being blocked;
(4) install the adsorption plate, the inside through the active carbon material is the adsorption plate of reticulation form and is convenient for fine adsorbing filtration to water to make the inside impurity of water and the fine absorption of noxious material, be convenient for improve through the adsorption plate of "W" shape and adsorb and filterable efficiency, thereby be convenient for that impurity is fine drops.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a right side view of the storage board of the present invention;
FIG. 3 is a right side view of the movable plate of the present invention;
FIG. 4 is a schematic top view of the base body of the present invention;
FIG. 5 is a schematic top view of a clamping plate according to the present invention;
FIG. 6 is a sectional view of the movable rod and worm wheel connection according to the present invention.
In the figure: 1. a base body; 2. a water pump; 3. a processing chamber; 4. an adsorption plate; 5. a storage plate; 6. a drain pipe; 7. moving the plate; 8. a worm; 9. mounting a rod; 10. a groove; 11. a filter plate; 12. clamping a plate; 13. a through hole; 14. disassembling the rod; 15. fixing grooves; 16. a slag outlet; 17. a travel bar; 18. a worm gear; 19. a limiting block; 20. a limiting groove; 21. a limiting plate; 22. installing a cone; 23. a card slot; 24. fixing the rod; 25. a support bar; 26. a movable shaft.
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 fig. 1-6, the present invention provides a technical solution: a coal mining drainage device convenient to mount and move comprises a base main body 1, a water pump 2, a processing chamber 3, an adsorption plate 4, a containing plate 5, a drainage pipe 6, a moving plate 7, a worm 8, a mounting rod 9, a groove 10, a filter plate 11, a clamping plate 12, a through hole 13, a dismounting rod 14, a fixing groove 15, a slag hole 16, a moving rod 17, a worm wheel 18, a limiting block 19, a limiting groove 20, a limiting plate 21, a mounting cone 22, a clamping groove 23, a fixing rod 24, a supporting rod 25 and a movable shaft 26, wherein the water pump 2 is mounted on the left side above the base main body 1, the processing chamber 3 is fixed on the right side of the water pump 2, the adsorption plate 4 is mounted in the processing chamber 3, the slag hole 16 is fixed below the right side of the processing chamber 3, the containing plate 5 is arranged on the right side of the slag hole 16, the through hole 13 is mounted in the containing plate 5, the drainage pipe 6 penetrates through the through hole 13, and, a moving plate 7 penetrates through the outer side of the worm 8, a groove 10 is arranged inside the moving plate 7, a dismounting rod 14 is connected to the left side of the moving plate 7, a fixing groove 15 is arranged on the left side of the dismounting rod 14, a base main body 1 is arranged on the outer side of the fixing groove 15, the moving plate 7 is fixed at the right end of the mounting rod 9, a moving shaft 26 is arranged above the left end of the mounting rod 9, the moving shaft 26 penetrates through the mounting rod 9 and is connected with a supporting rod 25, a fixing rod 24 is arranged at the left end of the supporting rod 25, a clamping plate 12 is fixed inside the right side of the containing plate 5, clamping grooves 23 are arranged at the left end and the right end of the clamping plate 12, a moving rod 17 is arranged inside the groove 10, the outer side of the moving rod 17 penetrates through a worm wheel 18 and a limiting plate 21 and is connected with a mounting cone 22, the worm 8 is meshed with the outer side, a limiting plate 21 is arranged at the bottom of the limiting groove 20;
the section of the adsorption plate 4 is W-shaped, a gap is formed between the rightmost end of the adsorption plate 4 and the inner wall of the treatment chamber 3, the adsorption plate 4 is of a mesh structure, and water can be conveniently filtered through the mesh structure in the adsorption plate 4;
the movable plate 7 is connected with the dismounting rod 14 through a bearing, the lowest point of the movable plate 7 is higher than the lowest point of the base body 1, the movable plate 7 is connected with the fixed groove 15 through threads, and the top end of the drain pipe 6 is conveniently fixed through the movable plate 7;
the clamping plate 12 and the clamping grooves 23 are of an integral structure, the cross section of the clamping plate 12 is I-shaped, the clamping plates 12 are distributed in the containing plate 5 at equal intervals, and the drainage pipe 6 is wound, fixed and contained conveniently through the clamping grooves 23 on the left side and the right side of the clamping plate 12;
the connecting mode of the moving rod 17 and the mounting cone 22 is welding, the connecting mode of the moving rod 17 and the worm wheel 18 is threaded connection, and the mounting cone 22 is driven to descend conveniently through the movement of the moving rod 17;
the support rod 25 forms a telescopic structure through the movable shaft 26, the central line of the support rod 25 is in the same line with the central line of the base body 1, the right end of the base body 1 is in an opening shape, and the telescopic structure of the support rod 25 is convenient for driving the drain pipe 6 to move, so that the drain work between different positions is convenient.
The working principle is as follows: when the drainage device convenient for installation and movement is used for coal mining, firstly, the whole device is moved into a working area, after the drainage device reaches the working area, as shown in figure 1, the left end of a water pump 2 is connected with a water collecting device, then, as shown in figure 3, a worm 8 is rotated, a worm wheel 18 which is meshed and connected is driven to rotate through the rotation of the worm 8, at the moment, a circular limiting block 19 at the bottom of the worm wheel 18 rotates in a limiting groove 20 in a limiting plate 21, so that the worm wheel 18 stably rotates, as shown in figure 6, the worm wheel 18 drives a moving rod 17 which is internally in threaded connection to descend in the groove 10, so that the moving rod 17 drives an installation cone 22 to descend, therefore, the installation cone 22 is inserted into the working area in the descending process, and further, the moving plate 7 is well fixed with a water accumulation part in the working area, the drain pipe 6 fixed in the movable plate 7 is contacted with the accumulated water;
then, the water pump 2 is connected with an external mobile power supply, at this time, the water pump 2 starts to work, the water pump 2 drives the drain pipe 6 to extract the accumulated water, the accumulated water is filtered by the filter plate 11 and then enters the drain pipe 6, the top end of the drain pipe 6 is conveniently protected by the filter plate 11, the external sludge impurities are prevented from entering the drain pipe 6 to cause blockage, then, the water enters the treatment chamber 3 through the drain pipe 6, then, the water is well filtered and adsorbed by the adsorption plate 4 which is made of the activated carbon material and is of a mesh shape inside the treatment chamber 3, fine impurities and toxic substances inside the water are well adsorbed, further, the impurities are prevented from entering the inside of the water pump 2 to influence the use of the water pump 2, the water is also conveniently treated and then discharged, the environment pollution is avoided, meanwhile, the adsorption and filtration efficiency is conveniently improved by the adsorption plate 4 of the W shape, the W-shaped adsorption plate 4 is convenient for impurities to well fall on the right side of the adsorption plate 4, the later cleaning through the slag outlet 16 is facilitated, and then water is well discharged into the water collecting device connected on the left side through the water pump 2 to be stored so as to be convenient for secondary use in the later period;
when accumulated water at different positions needs to be treated, as shown in fig. 2 and 5, the drain pipe 6 is taken out of the clamping grooves 23 at the left and right sides of the clamping plate 12 in the storage plate 5, the worm 8 is reversely rotated to lift the installation cone 22, then, as shown in fig. 1 and 4, the dismounting rod 14 at the left side of the moving plate 7 is pulled rightwards while bearing-rotating the moving plate 7, so that the dismounting rod 14 is separated from the fixing groove 15 in the base body 1, then, the supporting rod 25 is pulled through the installation rod 9, at this time, the supporting rod 25 is pulled through the movable shaft 26, the connecting mode of the moving plate 7 and the installation rod 9 is welding, the moving plate 7 is driven to move rightwards through the pulling of the supporting rod 25, then, as described above, the installation cone 22 is lowered through the rotation of the worm 8, the movable plate 7 is fixed by the mounting cone 22, so that the whole device can be used for draining water in other areas without moving, the workload of workers is reduced, and the whole device is well used, which is the working process of the whole device and is not described in detail in the specification, for example, the water pump 2 belongs to the prior art known by persons skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a drainage device is used in coal mining convenient to installation and removal, includes base main part (1), water pump (2), worm (8) and installation pole (9), its characterized in that: the improved water treatment device is characterized in that a water pump (2) is installed on the left side above the base body (1), a treatment chamber (3) is fixed on the right side of the water pump (2), an adsorption plate (4) is installed inside the treatment chamber (3), a slag outlet (16) is fixed below the right side of the treatment chamber (3), a containing plate (5) is arranged on the right side of the slag outlet (16), a through hole (13) is installed inside the containing plate (5), a drain pipe (6) penetrates through the through hole (13), the top end of the drain pipe (6) penetrates through the movable plate (7) and is connected with a filter plate (11), a movable plate (7) penetrates through the outer side of the worm (8), a groove (10) is installed inside the movable plate (7), a dismounting rod (14) is connected to the left side of the movable plate (7), a fixing groove (15) is arranged on the left side of the dismounting rod (14), the base body (1) is installed on the outer side, a moving plate (7) is fixed at the right end of the mounting rod (9), a movable shaft (26) is arranged above the left end of the mounting rod (9), the movable shaft (26) penetrates through the mounting rod (9) and is connected with the supporting rod (25), a fixing rod (24) is arranged at the left end of the supporting rod (25), a clamping plate (12) is fixed inside the right side of the containing plate (5), clamping grooves (23) are arranged at the left end and the right end of the clamping plate (12), a moving rod (17) is arranged in the groove (10), the outer side of the moving rod (17) penetrates through the worm wheel (18) and the limiting plate (21) to be connected with the mounting cone (22), and the outer side of the worm wheel (18) is engaged with a worm (8), the bottom of the worm wheel (18) is provided with a limit block (19), and the bottom of the limiting block (19) is provided with a limiting groove (20), and the bottom of the limiting groove (20) is provided with a limiting plate (21).
2. A coal mining drainage device convenient to install and move according to claim 1, wherein: the section of the adsorption plate (4) is W-shaped, a gap is formed between the rightmost end of the adsorption plate (4) and the inner wall of the processing chamber (3), and the interior of the adsorption plate (4) is of a mesh structure.
3. A coal mining drainage device convenient to install and move according to claim 1, wherein: the movable plate (7) is connected with the dismounting rod (14) through a bearing, the lowest point of the movable plate (7) is higher than that of the base body (1), and the movable plate (7) is connected with the fixed groove (15) through threads.
4. A coal mining drainage device convenient to install and move according to claim 1, wherein: the clamping plate (12) and the clamping groove (23) are of an integral structure, the cross section of the clamping plate (12) is I-shaped, and the clamping plate (12) is distributed in the accommodating plate (5) at equal intervals.
5. A coal mining drainage device convenient to install and move according to claim 1, wherein: the movable rod (17) and the mounting cone (22) are connected in a welding mode, and the movable rod (17) and the worm wheel (18) are connected in a threaded mode.
6. A coal mining drainage device convenient to install and move according to claim 1, wherein: the support rod (25) forms a telescopic structure through the movable shaft (26), the central line of the support rod (25) and the central line of the base main body (1) are on the same straight line, and the right end of the base main body (1) is in an open shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811497385.1A CN111287791A (en) | 2018-12-07 | 2018-12-07 | Drainage device is used in coal mining convenient to installation and removal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811497385.1A CN111287791A (en) | 2018-12-07 | 2018-12-07 | Drainage device is used in coal mining convenient to installation and removal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111287791A true CN111287791A (en) | 2020-06-16 |
Family
ID=71029289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811497385.1A Pending CN111287791A (en) | 2018-12-07 | 2018-12-07 | Drainage device is used in coal mining convenient to installation and removal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111287791A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2367032A (en) * | 1939-09-02 | 1945-01-09 | Bour Harry E La | Pump for mobile fire pumpers |
| CN104114812A (en) * | 2011-12-08 | 2014-10-22 | 伟尔矿物澳大利亚私人有限公司 | Pump apparatus |
| CN204327187U (en) * | 2014-12-08 | 2015-05-13 | 鞍钢集团矿业公司 | Mining area dewatering installation |
| CN207260053U (en) * | 2017-09-30 | 2018-04-20 | 天津宏志海绵城市有限公司 | A kind of municipal administration drainage arrangement |
| CN207406520U (en) * | 2017-10-23 | 2018-05-25 | 临沂矿业集团有限责任公司 | A kind of mining multistage drainage system automatic water diversion device |
| CN208073548U (en) * | 2018-04-02 | 2018-11-09 | 河南矿山抢险救灾中心 | A kind of coal mine emergency drainage cart |
| CN208106681U (en) * | 2018-04-12 | 2018-11-16 | 长春市恒裕机械制造有限公司 | Removable drawing liquid pump |
| CN108867807A (en) * | 2018-07-13 | 2018-11-23 | 聂春华 | A kind of town road drainage arrangement |
-
2018
- 2018-12-07 CN CN201811497385.1A patent/CN111287791A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2367032A (en) * | 1939-09-02 | 1945-01-09 | Bour Harry E La | Pump for mobile fire pumpers |
| CN104114812A (en) * | 2011-12-08 | 2014-10-22 | 伟尔矿物澳大利亚私人有限公司 | Pump apparatus |
| CN204327187U (en) * | 2014-12-08 | 2015-05-13 | 鞍钢集团矿业公司 | Mining area dewatering installation |
| CN207260053U (en) * | 2017-09-30 | 2018-04-20 | 天津宏志海绵城市有限公司 | A kind of municipal administration drainage arrangement |
| CN207406520U (en) * | 2017-10-23 | 2018-05-25 | 临沂矿业集团有限责任公司 | A kind of mining multistage drainage system automatic water diversion device |
| CN208073548U (en) * | 2018-04-02 | 2018-11-09 | 河南矿山抢险救灾中心 | A kind of coal mine emergency drainage cart |
| CN208106681U (en) * | 2018-04-12 | 2018-11-16 | 长春市恒裕机械制造有限公司 | Removable drawing liquid pump |
| CN108867807A (en) * | 2018-07-13 | 2018-11-23 | 聂春华 | A kind of town road drainage arrangement |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200616 |