CN204150703U - Material conveying device and asphalt mixing plant - Google Patents
Material conveying device and asphalt mixing plant Download PDFInfo
- Publication number
- CN204150703U CN204150703U CN201420520731.4U CN201420520731U CN204150703U CN 204150703 U CN204150703 U CN 204150703U CN 201420520731 U CN201420520731 U CN 201420520731U CN 204150703 U CN204150703 U CN 204150703U
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- Prior art keywords
- transporting objects
- recycling
- conveying assembly
- material conveying
- pipeline
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- Expired - Fee Related
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- 239000000463 material Substances 0.000 title claims abstract description 89
- 239000010426 asphalt Substances 0.000 title description 2
- 230000007704 transition Effects 0.000 claims abstract description 27
- 238000004064 recycling Methods 0.000 claims description 75
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 description 45
- 239000000428 dust Substances 0.000 description 11
- 230000006870 function Effects 0.000 description 6
- 238000000605 extraction Methods 0.000 description 4
- 235000013312 flour Nutrition 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007595 memory recall Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Air Transport Of Granular Materials (AREA)
Abstract
The utility model provides a material conveying device and bituminous mixing plant. The material conveying device comprises: a feeding section; a transitional material storage part; the feeding part is connected with the transition material storage part through the material conveying component; the air supply part is used for enabling materials to flow in the material conveying assembly along the extending direction of the material conveying assembly and is connected with the material conveying assembly. Because the air supply part is arranged, the materials flow in the material conveying assembly in a pneumatic conveying mode and move from one station to another station, and therefore the purpose of material operation is achieved. Because the material conveying device adopts pneumatic conveying, the production cost of the material conveying device is effectively reduced, the structural complexity is simplified, and the power consumption of system operation is reduced, so that the material conveying device has the characteristics of low use cost, high use reliability, simplicity and convenience in installation, difficulty in failure, simplicity in maintenance and the like.
Description
Technical field
The utility model relates to concrete mechanical equipment technical field, more specifically, relates to a kind of device for transporting objects and bituminous mixing plant.
Background technology
Bituminous mixing plant is generally used for production bituminous mixture, to supply raw materials supply for laying the asphalt coating such as highway, airport, port and pier.
Bituminous mixing plant comprises device for transporting objects, and especially for the device for transporting objects of recycling powder, its a large amount of recycling powder being mainly used in being produced in process of production by bituminous mixing plant carry out reclaiming, discharge, the operation of storage etc.When carrying out reclaimer operation to recycling powder, recycling powder is transported to powder scale and sends into recycling in agitated kettle after weighing.
As shown in Figure 1, the recycling powder collected by sack cleaner is transported to back powder gig 1 ' through conveyor screw 7 ', and rise to recycling powder circulating line 2 ' by returning powder gig 1 ', recycling powder can be carried by hot aggregate storage bin 8 ' to filler weigher by the first flour extraction pipe 21 ', realize the recycling of recycling powder.Meanwhile, if when recycling powder does not recycle, then can be realized the function of outwards discharge recycling powder by the second flour extraction pipe 22 '.Wherein, the function that the first butterfly valve 3 ', the second butterfly valve 4 ' realize recycling powder outwards to discharge switches and is delivered to recycling powder tank 9 ', and the recycling powder simultaneously in recycling powder tank 9 ' delivers to back powder gig 1 ' by conveyor screw 7 '; 3rd butterfly valve 5 ', the 4th butterfly valve 6 ' realize the function of recycling powder directly to outer discharge and outwards discharge again after processing to switch.
Owing to using the equipment such as gig, the problems such as manufacturing cost is high, power consumption is high, use cost is high, high, the easy fault of complex structure, installation complexity, maintenance difficulty are large that thus make device for transporting objects exist.
Utility model content
The utility model aims to provide a kind of device for transporting objects and bituminous mixing plant, there is high, the baroque problem of manufacturing cost to solve device for transporting objects in prior art.
For solving the problems of the technologies described above, according to an aspect of the present utility model, providing a kind of device for transporting objects, comprising: feed portion; Transition storing portion; Conveying assembly, feed portion is connected with transition storing portion by conveying assembly; For making material along the gas supply part that the bearing of trend of conveying assembly flows in conveying assembly, gas supply part is connected with conveying assembly.
Further, conveying assembly comprises conveying pipeline, and device for transporting objects also comprises: recycling can; Material feeding pipeline, the first end of material feeding pipeline is connected with conveying pipeline, and the second end of material feeding pipeline is connected with recycling can.
Further, the second end of material feeding pipeline is communicated with the upper end of recycling can.
Further, device for transporting objects also comprises triple valve, and material feeding pipeline is connected with conveying pipeline by triple valve.
Further, device for transporting objects also comprises discharge pipe, and discharge pipe is connected with the lower end of recycling can.
Further, the lower end of recycling can is communicated with conveying assembly, and the lower end of recycling can is positioned at the upstream of conveying assembly, and material feeding pipeline is positioned at the downstream of conveying assembly.
Further, conveying assembly also comprises transitional storehouse, and the lower end of recycling can is by transitional storehouse and conveying pipeline connection, and feed portion is communicated with transitional storehouse.
Further, conveying assembly also comprises conveyer, and conveyer is arranged between transitional storehouse and conveying pipeline, and gas supply part is connected with conveying pipeline.
Another aspect of the present utility model, provides a kind of bituminous mixing plant, comprises device for transporting objects, and device for transporting objects is above-mentioned device for transporting objects.
Further, the gas supply part of device for transporting objects is Air compressor.
Feed portion in the utility model is connected with transition storing portion by conveying assembly, and gas supply part is connected with conveying assembly, and gas supply part flows along the bearing of trend of conveying assembly in conveying assembly for making material.Owing to being provided with gas supply part, thus material is flowed in conveying assembly by pneumatic conveying mode, and runs to another station by a station, thus realizes the object of material running.Because device for transporting objects adopts Geldart-D particle, thus effectively reduce the productive costs of device for transporting objects, the complexity that simplifies the structure, reduce the power consumption of system cloud gray model, device for transporting objects is had, and use cost is low, reliability of service is high, simple installation, not easily fault, safeguard the features such as simple.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 diagrammatically illustrates the structural representation of device for transporting objects of the prior art; And
Fig. 2 diagrammatically illustrates the structural representation of the device for transporting objects in the utility model.
Reference numeral in figure: 10, feed portion; 11, the first butterfly valve; 12, the second butterfly valve; 13, the first dust exhaustor; 14, the first level-sensing device; 20, transition storing portion; 21, transition powder storehouse; 22, metering screw; 23, the second dust exhaustor; 24, the second level-sensing device; 30, conveying assembly; 31, conveying pipeline; 32, transitional storehouse; 33, conveyer; 40, gas supply part; 50, recycling can; 51, material feeding pipeline; 52, discharge pipe; 60, triple valve; 90, gas source pipe; 91, gas tank; 92, air inlet pipe; 93, control cock; 94, reducing valve; 1 ', powder gig is returned; 2 ', recycling powder circulating line; 3 ', first butterfly valve; 4 ', second butterfly valve; 5 ', the 3rd butterfly valve; 6 ', the 4th butterfly valve; 7 ', conveyor screw; 8 ', hot aggregate storage bin; 9 ', recycling powder tank; 21 ', first flour extraction pipe; 22 ', second flour extraction pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As first aspect of the present utility model, provide a kind of device for transporting objects.As shown in Figure 2, device for transporting objects comprises feed portion 10, transition storing portion 20, conveying assembly 30 and for making material along the gas supply part 40 that the bearing of trend of conveying assembly 30 flows in conveying assembly 30, and feed portion 10 is connected with transition storing portion 20 by conveying assembly 30; Gas supply part 40 is connected with conveying assembly 30.Owing to being provided with gas supply part 40, thus material (such as powder) is flowed in conveying assembly 30 by pneumatic conveying mode, and runs to another station by a station, thus realizes the object of material running.Because device for transporting objects adopts Geldart-D particle, thus effectively reduce the productive costs of device for transporting objects, the complexity that simplifies the structure, reduce the power consumption of system cloud gray model, device for transporting objects is had, and use cost is low, reliability of service is high, simple installation, not easily fault, safeguard the features such as simple.
Preferably, feed portion 10 is fine powder conveyor screw.
Conveying assembly 30 in the utility model comprises conveying pipeline 31, and device for transporting objects also comprises recycling can 50 and material feeding pipeline 51, and the first end of material feeding pipeline 51 is connected with conveying pipeline 31, and the second end of material feeding pipeline 51 is connected with recycling can 50.Owing to being provided with recycling can 50 and material feeding pipeline 51, thus material can be recycled in recycling can 50 and store through conveying pipeline 31, material feeding pipeline 51, thus makes device for transporting objects have the function of memory recall powder.
In preferred implementation as shown in Figure 2, the second end of material feeding pipeline 51 is communicated with the upper end of recycling can 50.Because the second end of material feeding pipeline 51 is communicated with the upper end of recycling can 50, thus material injects in recycling can 50 by the top of recycling can 50, thus effectively avoid the mouth of pipe of feed blocking material feeding pipeline 51, and use after ensureing the new material injected, the material that first injects first uses.
Preferably, device for transporting objects also comprises triple valve 60, and material feeding pipeline 51 is connected with conveying pipeline 31 by triple valve 60.Because material feeding pipeline 51 is connected with conveying pipeline 31 by triple valve 60, thus by control the mode of operation of triple valve 60 can make conveying pipeline 31 only for by mass transport to transition storing portion 20, or injected in recycling can 50 through conveying pipeline 31, material feeding pipeline 51 by material, thus ensure that the reliability of service of device for transporting objects.Preferably, triple valve 60 is Pneumatic three-way ball valve.
Device for transporting objects in the utility model also comprises the first dust exhaustor 13, first dust exhaustor 13 and is arranged on recycling can 50 and (please refer to Fig. 2).Preferably, device for transporting objects also comprises and unloads splenium, unloads splenium and is arranged on recycling can 50.Because the mode by Geldart-D particle is to injecting material in recycling can 50, thus likely causes recycling can 50 internal gas pressure excessive, by unloading splenium, effectively can play the effect of pressure release, thus ensure the safety in utilization of recycling can 50.Preferably, unloading splenium is safety valve.Preferably, the first dust exhaustor 13 is vibratory dust remover.
Device for transporting objects in the utility model also comprises discharge pipe 52, and discharge pipe 52 is connected with the lower end of recycling can 50.Owing to being provided with discharge pipe 52, be thus convenient to the material in recycling can 50 directly to discharge, thus the function of discharging again after making device for transporting objects have recovered material.
In preferred implementation as shown in Figure 2, discharge pipe 52 is tilted to lower setting.Because discharge pipe 52 is tilted to lower setting, thus ensure that the flowing reliability of material in discharge pipe 52, effectively avoid material in the problem of discharge pipe 52 inner accumulated, plugs vent line 52.
In preferred implementation as shown in Figure 2, device for transporting objects also comprises the first butterfly valve 11, first butterfly valve 11 and is arranged on discharge pipe 52, for controlling the discharge opportunity of material.
The lower end of the recycling can 50 in the utility model is communicated with conveying assembly 30, and the lower end of recycling can 50 is positioned at the upstream of conveying assembly 30, and material feeding pipeline 51 is positioned at the downstream (please refer to Fig. 2) of conveying assembly 30.Because the lower end of recycling can 50 is communicated with conveying assembly 30, thus the material be stored in recycling can 50 can be delivered in transition storing portion 20 by conveying assembly 30, thus makes recycling can 50 play storage material and can supply the dual-use function of material to transition storing portion 20.
Preferably, conveying assembly 30 also comprises transitional storehouse 32, and the lower end of recycling can 50 is communicated with conveying pipeline 31 by transitional storehouse 32, and feed portion 10 is communicated with transitional storehouse 32 (please refer to Fig. 2).Owing to being provided with transitional storehouse 32, no matter be thus that feed portion 10 or the interior material flowed out of recycling can 50 all can be kept at transitional storehouse 32, avoid the entrance due to conveying assembly 30 to block, cause the solid accumulation even problem of adverse current.
Conveying assembly 30 in the utility model also comprises conveyer 33, and conveyer 33 is arranged between transitional storehouse 32 and conveying pipeline 31, and gas supply part 40 is connected with conveying pipeline 31.Owing to being provided with conveyer 33, thus ensure that the runner reliability of material in conveying assembly 30, thus ensure that the stability in use of device for transporting objects.Preferably, conveyer 33 is low-pressure pneumatic conveyers.
In this preferred implementation, device for transporting objects also comprises the lower end that the second butterfly valve 12, second butterfly valve 12 is arranged on recycling can 50.Owing to being provided with the second butterfly valve 12, thus can control the on off mode of recycling can 50 and transitional storehouse 32, thus control the conveying opportunity of material.
Device for transporting objects in the utility model also comprises gas source pipe 90, gas tank 91, air inlet pipe 92 and control cock 93, and wherein, gas supply part 40 is connected with conveyer 33 by gas source pipe 90, gas tank 91, air inlet pipe 92 successively, and control cock 93 is arranged on air inlet pipe 92.Owing to being provided with gas tank 91, thus enable the gas supplied by gas supply part 40 be kept in gas tank 91, thus ensure the stability of gas conveying in device for transporting objects working process.Preferably, control cock 93 is ball valves.
In preferred implementation as shown in Figure 2, device for transporting objects also comprises reducing valve 94, and reducing valve 94 is arranged on air inlet pipe 92, and reducing valve 94 is between control cock 93 and gas tank 91.Owing to being provided with reducing valve 94, the gas atmosphere that exported by gas tank 91 thus effectively can be avoided excessive, and make gas after reducing valve 94, be adjusted to pressure needed for work, thus ensure that the functional reliability of device for transporting objects.
In preferred implementation as shown in Figure 2, transition storing portion 20 comprises transition powder storehouse 21, metering screw 22 and the second dust exhaustor 23, and wherein, conveying assembly 30 is communicated with transition powder storehouse 21, second dust exhaustor 23 is arranged on transition powder storehouse 21, and the lower end in transition powder storehouse 21 is provided with metering screw 22.Preferably, the second dust exhaustor 23 is vibratory dust removers.In the above-described embodiments, material passes through metering screw 22 to powder scale feed.
In preferred implementation as shown in Figure 2, device for transporting objects also comprises the top that the first level-sensing device 14 and the second level-sensing device 24, first level-sensing device are arranged on recycling can 50, and the second level-sensing device 24 is arranged on the top in transition powder storehouse 21.First level-sensing device 14 for detecting the material level of material in recycling can 50, with discharges material timely when material is full of in recycling can 50.Second level-sensing device 24 for detecting the material level of material in transition powder storehouse 21, with timely discharges material when material is full of in transition powder storehouse 21 or control triple valve 60 by discharge of materials in recycling can 50.
Preferably, device for transporting objects also comprises control part, and control part is connected, for controlling the mode of operation of above-mentioned each parts and accepting detection signal with triple valve 60, control cock 93, first butterfly valve 11, second butterfly valve 12, first level-sensing device 14 and the second level-sensing device 24.Further, control part is PLC.
The principle of work of the device for transporting objects in the utility model: the recycling powder collected by sack cleaner is transported to conveyer 33 by feed portion 10 through transitional storehouse 32, is then delivered in conveying pipeline 31 by conveyer 33 again.Control triple valve 60, conveying assembly 30 and material feeding pipeline 51 are ended, and now recycling powder is only delivered in the transition powder storehouse 21 of band second dust exhaustor 23 by conveying assembly 30, is finally carried to filler weigher by metering screw 22, realizes the recycling of recycling powder; In above process, if the second level-sensing device 24 detects material when being full of transition powder storehouse 21, triple valve 60 should be made conveying pipeline 31 and material feeding pipeline 51 conducting, now material is delivered in recycling can 50 and is reclaimed, when the first level-sensing device 14 detect be full of material in recycling can 50 time, by opening the first butterfly valve 11, material is discharged through discharge pipe 52, or by opening the second butterfly valve 12, material is transported in transition storing portion 20 by conveying assembly 30.If recycling powder does not recycle, then control triple valve 60 and make conveying pipeline 31 and material feeding pipeline 51 conducting, now recycling powder flows in recycling can 50 by material feeding pipeline 51; When the first level-sensing device 14 detect be full of material in recycling can 50 time, if transition powder storehouse 21 needs feed, then control the second butterfly valve 12 and open, control triple valve 60 and storehouse 21 conducting of transition powder simultaneously, realize the recycle of recycling powder; If transition powder storehouse 21 does not need feed, because of the full material of recycling can 50, then need control first butterfly valve 11 to open, material discharges directly to after outer row or process again.
As second aspect of the present utility model, provide a kind of bituminous mixing plant.Bituminous mixing plant comprises device for transporting objects, and device for transporting objects is above-mentioned device for transporting objects.Because the device for transporting objects in the utility model has that use cost is low, reliability of service is high, simple installation, not easily fault, safeguards simple feature, thus ensure that the functional reliability of bituminous mixing plant.
Preferably, the gas supply part 40 of device for transporting objects is Air compressor.Due to using the Air compressor of bituminous mixing plant as source of the gas providing unit, thus avoid energy dissipation, reduce the energy consumption of bituminous mixing plant, thus improve the serviceability of bituminous mixing plant.
Device for transporting objects tool in the utility model has the following advantages:
1, low cost of manufacture: gig relatively, has better price advantage;
2, structure simple, facility compact, dependable performance, long service life: no-rotary part except the electronic impeller flapper in conveyer, without other consumable accessorys, serviceability is safe and reliable, and maintenance, repair are simple and convenient, long service life;
3, easy for installation: gig relatively, conveying assembly 30 volume is little, more light, convenient to be installed;
4, environmental protection: due to convey materials in closed conduit, its leakproofness is better, can not make moist, does not pollute, not by various weather influence, is more conducive to produce and environmental protection by strict guarantee quality of material;
5, energy-conservation: required energy sources is more energy-conservation in Air compressor, few, the relatively high-power gig of power consumption, low, the required pressure of electronic impeller flapper energy consumption of conveyer is low, carries energy-conservation.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a device for transporting objects, is characterized in that, comprising:
Feed portion (10);
Transition storing portion (20);
Conveying assembly (30), described feed portion (10) is connected with described transition storing portion (20) by described conveying assembly (30);
For making material along the gas supply part (40) that the bearing of trend of described conveying assembly (30) flows in described conveying assembly (30), described gas supply part (40) is connected with described conveying assembly (30).
2. device for transporting objects according to claim 1, is characterized in that, described conveying assembly (30) comprises conveying pipeline (31), and described device for transporting objects also comprises:
Recycling can (50);
Material feeding pipeline (51), the first end of described material feeding pipeline (51) is connected with described conveying pipeline (31), and the second end of described material feeding pipeline (51) is connected with described recycling can (50).
3. device for transporting objects according to claim 2, is characterized in that, the second end of described material feeding pipeline (51) is communicated with the upper end of described recycling can (50).
4. device for transporting objects according to claim 2, it is characterized in that, described device for transporting objects also comprises triple valve (60), and described material feeding pipeline (51) is connected with described conveying pipeline (31) by described triple valve (60).
5. device for transporting objects according to claim 2, is characterized in that, described device for transporting objects also comprises discharge pipe (52), and described discharge pipe (52) is connected with the lower end of described recycling can (50).
6. device for transporting objects according to claim 2, it is characterized in that, the lower end of described recycling can (50) is communicated with described conveying assembly (30), and the lower end of described recycling can (50) is positioned at the upstream of described conveying assembly (30), described material feeding pipeline (51) is positioned at the downstream of described conveying assembly (30).
7. device for transporting objects according to claim 6, it is characterized in that, described conveying assembly (30) also comprises transitional storehouse (32), the lower end of described recycling can (50) is communicated with described conveying pipeline (31) by described transitional storehouse (32), and described feed portion (10) is communicated with described transitional storehouse (32).
8. device for transporting objects according to claim 7, it is characterized in that, described conveying assembly (30) also comprises conveyer (33), described conveyer (33) is arranged between described transitional storehouse (32) and described conveying pipeline (31), and described gas supply part (40) is connected with described conveying pipeline (31).
9. a bituminous mixing plant, comprises device for transporting objects, it is characterized in that, described device for transporting objects is the device for transporting objects according to any one of claim 1 to 8.
10. bituminous mixing plant according to claim 9, is characterized in that, the described gas supply part (40) of described device for transporting objects is Air compressor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201420520731.4U CN204150703U (en) | 2014-09-11 | 2014-09-11 | Material conveying device and asphalt mixing plant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201420520731.4U CN204150703U (en) | 2014-09-11 | 2014-09-11 | Material conveying device and asphalt mixing plant |
Publications (1)
Publication Number | Publication Date |
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CN204150703U true CN204150703U (en) | 2015-02-11 |
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Application Number | Title | Priority Date | Filing Date |
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CN201420520731.4U Expired - Fee Related CN204150703U (en) | 2014-09-11 | 2014-09-11 | Material conveying device and asphalt mixing plant |
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CN (1) | CN204150703U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108262860A (en) * | 2017-01-04 | 2018-07-10 | 中联重科股份有限公司 | Material conveying control method, equipment and system |
CN111891756A (en) * | 2020-07-15 | 2020-11-06 | 中南大学 | Underground fine ore lifting system and application method thereof |
-
2014
- 2014-09-11 CN CN201420520731.4U patent/CN204150703U/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108262860A (en) * | 2017-01-04 | 2018-07-10 | 中联重科股份有限公司 | Material conveying control method, equipment and system |
CN111891756A (en) * | 2020-07-15 | 2020-11-06 | 中南大学 | Underground fine ore lifting system and application method thereof |
CN111891756B (en) * | 2020-07-15 | 2021-08-27 | 中南大学 | Underground fine ore lifting system and application method thereof |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150211 Termination date: 20160911 |