CN109751051B - Underwater ore collecting mechanism - Google Patents
Underwater ore collecting mechanism Download PDFInfo
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- CN109751051B CN109751051B CN201910148523.3A CN201910148523A CN109751051B CN 109751051 B CN109751051 B CN 109751051B CN 201910148523 A CN201910148523 A CN 201910148523A CN 109751051 B CN109751051 B CN 109751051B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 50
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 78
- 239000011707 mineral Substances 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000002245 particle Substances 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 238000005065 mining Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 201000008827 tuberculosis Diseases 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229940115088 sea soft Drugs 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Removal Of Floating Material (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses an underwater ore collecting mechanism, which comprises a hydraulic conveying mechanism, a conveying channel and a catching disturbance mechanism, wherein the hydraulic conveying mechanism drives water in the conveying channel to flow from a mineral input port to a mineral output port, the catching disturbance mechanism is arranged at the mineral input port, the catching disturbance mechanism comprises a rotating piece, a catching disturbance plate with screening effect is arranged on the rotating piece, and the catching disturbance plate drives mineral particles below the mineral input port to push the mineral particles to the mineral input port through the rotating piece. According to the invention, the catching disturbance plate on the roller rotates in the thin and soft substrate, and the resistance of the catching disturbance plate is reduced through the structural design and arrangement of the catching disturbance plate, and meanwhile, the disturbance on the thin and soft substrate is reduced, so that the energy consumption is reduced, and the environmental damage is reduced. The hydraulic conveying mechanism adopts a hydraulic structure, so that moving parts are reduced, and the operation reliability is improved.
Description
Technical Field
The invention belongs to the technical field of underwater mining, and particularly relates to an underwater ore collecting mechanism for underwater multi-metal nodule collection.
Background
The ocean sediment surface layer has rich multi-metal nodules, contains various metals and has high economic exploitation value. The multi-metal nodule is collected from the submarine sediment with the depth of thousands of meters through the ore collecting mechanism, and meanwhile, the ore collecting mechanism is a completion mechanism of the first working procedure of the ocean mining and is also an important component part of the development of a deep sea mining system.
The mineral collecting device proposed at home and abroad mainly comprises three types of mechanical type, hydraulic type and compound type in the 80 s of the 20 th century. Mechanical means are used to collect the seafloor nodules. Representative are: belt-shaped chain plates, roller wheel bucket type and belt-shaped wheel bucket type, but the mechanical ore collecting device is more complex than the hydraulic type, the digging teeth are easy to damage, the digging sediment is too much, and the difficulty of continuous and reliable operation for a long time and high efficiency is great; the hydraulic ore collecting device sucks the nodule ore by utilizing the negative pressure generated by jet flow, and has the defects of collecting a large amount of submarine sediments, low energy utilization rate and large disturbance to the environment; the existing composite ore collecting device adopts tuberculosis collected by double rows of nozzles and conveyed by inclined chain plates, and has the defects of more moving parts, complex structure and low operation reliability.
Disclosure of Invention
The invention aims to provide an underwater ore collecting mechanism with low disturbance to the marine environment and low energy consumption in the collecting process, so as to solve the problems.
In order to achieve the above purpose, the invention discloses an underwater ore collecting mechanism, which comprises a hydraulic conveying mechanism, a conveying channel and a catching disturbance mechanism, wherein the hydraulic conveying mechanism drives water in the conveying channel to flow from a mineral input port to a mineral output port, the catching disturbance mechanism is arranged at the mineral input port and comprises a rotating piece, a catching disturbance plate with screening effect is arranged on the rotating piece, and the catching disturbance plate drives mineral particles below the mineral input port to push the mineral particles to the mineral input port through the rotating piece. Through the catching disturbance board that has screening effect, can filter the weak base material in propelling movement thing granule, reduce the resistance that catches the disturbance board and receive, reduce simultaneously the disturbance to the weak base material, reduce the energy consumption and reduce environmental destruction.
Further, the capture disturbance plate is provided with a plurality of filter holes for filtering underwater soft substrates, and the aperture of the filter holes is smaller than the particle size of target mineral particles, so that the soft substrates and water can be ensured to pass through the filter holes without passing through the target mineral particles.
Further, the mineral input port is provided with a mineral collecting cover, the lower extreme of the mineral collecting cover is provided with a first opening facing the soft bottom, the capturing disturbance mechanism is arranged in the mineral collecting cover, and the capturing disturbance plate extends to the lower side of the first opening. The ore collecting cover provides an installation space and a mineral inlet for the rotating piece, and when the disturbance plate is captured, mineral particles are rolled into the space in the ore collecting cover, stable hydraulic power can be formed in the ore collecting cover, and then the mineral particles are driven to enter the conveying channel.
Further, the rotating member is a roller, the roller is of a hollow structure, and a connecting channel for communicating the inner cavity with the outside is arranged on the roller. The roller with larger volume can prevent mineral particles from staying at the root of the capturing disturbance plate, and the roller is prevented from being crushed by deep water under high pressure through the inside and outside communication arrangement of the roller.
Further, the mineral input port faces the capturing perturbation plate below the roller, so that mineral particles pushed by the capturing perturbation plate can move towards the mineral input port.
Further, catch the disturbance board and include the skeleton and have the filtration pore filter screen, the skeleton with the removable installation of cylinder, the filter screen rigid coupling is on the skeleton, and the filter screen is fine rule form because it filters between the pore, and is little to the disturbance of weak soft base, and the filter screen source is extensive, and the removable design of skeleton can be targeted gathers the mineral granule of target particle diameter size simultaneously.
Further, the capturing disturbance plates are uniformly distributed on the rotating member, the capturing disturbance plates are intermittently arranged on the plane passing through the axis of the roller, and the capturing disturbance plates on the planes adjacent to the axis of the roller are arranged in a staggered manner, so that each grain of multi-metal tuberculosis can be captured and disturbed under the resistance of the thin and soft substrate when the roller rotates.
Further, the place ahead of collection ore deposit cover still is provided with the second opening, the open-ended downside of second and first opening intercommunication, the upside extends to the top of rotating member, catch the disturbance board and extend to outside the second opening to working range on the cylinder has been enlarged, further adaptation height is uneven submarine environment, the top setting of collection ore deposit cover is laminated to the catch disturbance board of rotating member top, thereby can prevent that mineral particles from catching the clearance between the top of disturbance board and collection ore deposit cover from spilling over.
Further, the hydraulic conveying mechanism is a water spraying assembly arranged on the conveying channel, the water spraying assembly comprises a nozzle, a water pump driving motor, a water pump and a water conveying pipeline, the water conveying pipeline is arranged on the conveying channel, the input end of the nozzle is connected with one end of the water conveying pipeline, the output end of the nozzle stretches into the conveying channel and faces the mineral output port, the other end of the water conveying pipeline is connected with one end of the water pump, and the other end of the water pump is connected with the water pump driving motor, so that stable and adjustable conveying hydraulic power is formed in the conveying channel.
Further, the conveying channel comprises an upper conveying channel cover plate, a lower conveying channel cover plate and a side plate, the upper conveying channel cover plate, the lower conveying channel cover plate and the side plate form a long rectangular section channel, the output end of the nozzle is arranged along the length direction of the long rectangular section, and then the water in the length direction of the long rectangular section can be driven to be uniformly and stably conveyed at the same speed.
Compared with the prior art, the invention has the advantages that:
according to the invention, the catching disturbance plate on the roller rotates in the thin and soft substrate, and the resistance of the catching disturbance plate is reduced through the structural design and arrangement of the catching disturbance plate, and meanwhile, the disturbance on the thin and soft substrate is reduced, so that the energy consumption is reduced, and the environmental damage is reduced. The hydraulic conveying mechanism adopts a hydraulic structure, so that moving parts are reduced, and the operation reliability is improved. The problems of large energy loss and large substrate disturbance in the hydraulic capturing process of the traditional hydraulic ore collecting system are solved, and the problems of more moving parts, complex structure and low operation reliability caused by adopting an inclined chain plate to convey tuberculosis in the traditional composite ore collecting mechanism are also solved.
The invention will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic front view of an underwater mineral collection mechanism disclosed in a preferred embodiment of the present invention;
FIG. 2 is a schematic right-side view of an underwater mineral collection mechanism disclosed in a preferred embodiment of the present invention;
FIG. 3 is an isometric schematic view of a water jet assembly disclosed in a preferred embodiment of the present invention;
fig. 4 is a schematic diagram of the working principle of the underwater mineral collection mechanism disclosed in the preferred embodiment of the invention.
Legend description:
1. a conveying channel; 2. a water spray assembly; 3. a nozzle; 4. a filter hole; 5. capturing a disturbance plate; 6. a drum driving motor; 7. a roller; 8. a conveying channel upper cover plate; 9. a conveying channel lower cover plate; 10. a side plate; 11. a water pump driving motor; 12. a water pump; 13. a water pipe; 14. a skeleton; 15. a filter screen; 16. a second opening; 17. a first opening; 18. a mineral collecting cover; 19. a mineral input port; 20. a mineral outlet; 21. and a connecting channel.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
As shown in fig. 1-4, the invention discloses an underwater ore collecting mechanism, which comprises a hydraulic conveying mechanism, a conveying channel 1 and a capturing disturbance mechanism, wherein the conveying channel 1 comprises a rectangular conveying channel 1 formed by a conveying channel upper cover plate 8, a conveying channel lower cover plate 9 and two side plates 10, and is of a long rectangular cross-section structure, two ends of the conveying channel 1 are provided with a mineral input port 19 and a mineral output port 20, the hydraulic conveying mechanism comprises a water spraying assembly 2, the water spraying assembly 2 comprises a water pump driving motor 11, a water pump 12, a nozzle 3 and a water conveying pipeline 13, the nozzle 3 is arranged at one end of the water conveying pipeline 13, the output port of the nozzle extends into the conveying channel 1, the water conveying pipeline 13 is arranged on the conveying channel 1, the other end of the water conveying pipeline 13 is connected with one end of the water pump 12, and the other end of the water pump 12 is connected with the water pump driving motor 11 (being a hydraulic motor). The whole water spray assembly 2 is arranged on the conveying channel 1, and the nozzle 3 of the water spray assembly 2 is arranged towards the output port of the conveying channel 1, so that when the nozzle 3 sprays water towards the output port of the conveying channel 1, water in the conveying channel 1 can be driven to flow from the mineral input port 19 to the mineral output port 20, and then the hydraulic conveying effect is realized.
When the device is specifically arranged, the output port of the nozzle 3 is of a flat structure, and is arranged along the length direction of the long rectangular section of the conveying channel 1, so that water in the length direction of the long rectangular section can be driven to be uniformly and stably conveyed at the same speed. The catching and disturbing mechanism is arranged in the mineral collecting cover 18 of the mineral input port 19, the catching and disturbing mechanism comprises a rotating piece, a catching and disturbing plate 5 with a filtering hole 4 is arranged on the rotating piece, the catching and disturbing plate 5 rotates along with the rotating piece to convey mineral particles in the thin and soft substrate into the mineral input port 19, wherein the aperture of the filtering hole 4 is smaller than the particle size of target mineral particles, so that the thin and soft substrate and water can be ensured to pass through the filtering hole 4, the target mineral particles can not pass through, and the driving resistance and the disturbance to the water body are reduced. The target mineral particles are then output from the mineral outlet 20 by hydraulic conveyance to a silo and a relay silo of the lifting system. Specifically, the capturing and disturbing mechanism further comprises a roller driving motor 6 (also a hydraulic driving motor) mounted on the ore collecting cover 18, the rotating member is a roller 7, two ends of the roller 7 are pivoted with opposite side walls of the ore collecting cover 18 and are driven to rotate by the roller driving motor 6, and the capturing and disturbing plate 5 is fixedly connected to the outer wall of the roller 7. The capturing disturbance plate 5 comprises an external framework 14 and an internal filter screen 15, wherein the filter screen 15 is provided with filter holes 4 (mesh holes are filter holes 4) for filtering the soft substrate, and the filter screen 15 has a thin line shape between the filter holes 4, so that the disturbance to the soft substrate is smaller, and the filter screen 15 has wide sources and practical applicability. In this embodiment, the skeleton 14 and the roller 7 are detachably connected (such as bolted connection) by a welding manner or a detachable connection manner, so that mineral particles with target particle sizes can be collected in a targeted manner, that is, the mineral particles with different particle sizes use the capturing disturbance plates 5 with different sizes of the filtering holes 4, so that accurate collection is realized. The filter screen 15 is fixedly connected to the framework 14.
In this embodiment, the drum 7 is of a hollow structure, and by means of the provision of such a cylindrical rotating member, mineral particles are prevented from collecting at the root of the rigid connection of the catching perturbation plate 5 when the catching perturbation plate 5 pushes the mineral particles toward the mineral input port 19. And the connecting channel 21 for communicating the inside and the outside is arranged on the roller 7, so that the roller 7 is prevented from being sealed to cause deep sea hydraulic fracturing, and the roller 7 is prevented from excessively disturbing the soft substrate.
Meanwhile, in the present embodiment, the catching perturbation plates 5 are intermittently staggered on the passing drum 7, that is, intermittently arranged on the plane of the axis of the passing drum 7, and the catching perturbation plates 5 on the planes of the axes of the different passing drums 7 are staggered. The resistance of the thin and soft substrate when the roller 7 rotates is reduced through intermittent arrangement, and the staggered arrangement on different surfaces ensures that each multi-metal nodule can be captured and disturbed.
In the present embodiment, the first opening 17 is provided below the ore collecting cover 18, and the second opening 16 is provided in front. The lower side of the second opening 16 communicates with the first opening 17, the upper side extends above the rotating member, and the catch perturbation plate 5 extends outside the second opening 16. Wherein a portion of the catch perturbation plates 5 extend below the first opening 17 for insertion into the submerged weak matrix to push mineral particles therein towards the mineral input port 19. At the same time, the portion above the second opening 16 is arranged as close as possible to the catching disturbance plate 5 (still maintaining a certain gap), so that a large conveying force is created, while also mineral particles placed into the collection hood 18 come out of the second opening 16. Through the setting of second opening 16, on the one hand has made things convenient for the installation of whole cylinder 7, simultaneously, through the effect of digging that catches disturbance board 5 that stretches out second opening 16 also can play to more can adapt to the rugged environment under water, strengthen the collection ore deposit ability.
In this embodiment, the hydraulic conveying mechanism is mounted on the conveying channel upper cover plate 8, and of course, the hydraulic conveying mechanism may be mounted on the conveying channel lower cover plate 9 according to actual needs, or both sides of the conveying channel upper cover plate 8 and the conveying channel lower cover plate 9 may be mounted.
The specific working process is as follows: the multi-metal nodule is formed on the soft substrate, or is buried in half or in full, and the shearing strength is almost zero because the surface layer of the deep sea soft substrate is particularly soft. In operation, the ore collecting mechanism is mounted at the front end of the underwater mining vehicle or the sampler (connected with the underwater mining vehicle or the sampler through a connecting rod and an oil cylinder). When the ore collecting mechanism collects the tuberculosis, the catching disturbance plate 5 on the drum 7 of the ore collecting mechanism is controlled by the mining vehicle or the sampler to be inserted into the soft substrate. The rotary drum 7 is driven by the rotary drum driving motor 6 to rotate in the thin and soft substrate, the thin and soft substrate flows away through the filtering holes 4 on the capturing and disturbing plate 5, the multi-metal nodules move to the mineral input port 19 under the action of the capturing and disturbing plate 5, move to the upper part of the conveying channel 1 under the driving of upward water flow in the conveying channel 1, and finally are output to the storage bin and the relay bin of the lifting system from the mineral output port 20. Since only the catching disturbance plate 5 rotates in the thin and soft substrate, and through the structural design and arrangement of the catching disturbance plate 5, the blocking force of the catching disturbance plate 5 is reduced, the disturbance to the substrate is reduced, the energy consumption is reduced, and the environmental damage is reduced. The hydraulic conveying mechanism adopts a hydraulic structure, so that moving parts are reduced, and the operation reliability is improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The underwater ore collecting mechanism comprises a hydraulic conveying mechanism, a conveying channel (1) and a catching disturbance mechanism, and is characterized in that the hydraulic conveying mechanism drives water in the conveying channel (1) to flow from a mineral input port (19) to a mineral output port (20), the catching disturbance mechanism is arranged at the mineral input port (19), the catching disturbance mechanism comprises a rotating piece, a catching disturbance plate (5) with screening effect is arranged on the rotating piece, and the catching disturbance plate (5) drives mineral particles below the mineral input port (19) to push the mineral particles to the mineral input port (19) through the rotating piece; the capturing disturbance plate (5) is provided with a plurality of filtering holes (4) for filtering underwater soft substrates, and the aperture of the filtering holes (4) is smaller than the particle size of target mineral particles; the mineral input port (19) is provided with a mineral collecting cover (18), a first opening (17) facing the soft bottom material is arranged at the lower end of the mineral collecting cover (18), the capturing and disturbing mechanism is arranged in the mineral collecting cover (18), and the capturing and disturbing plate (5) extends to the lower part of the first opening (17); the rotary part is a roller (7), the roller (7) is of a hollow structure, and a connecting channel (21) for communicating the inner cavity with the outside is arranged on the roller (7); -the mineral input port (19) is directed towards a catch turbulence plate (5) below the drum (7); the capturing disturbance plate (5) comprises a framework (14) and a filter screen (15) with a filter hole (4), wherein the framework (14) and the roller (7) are detachably arranged, and the filter screen (15) is fixedly connected on the framework (14); the hydraulic conveying mechanism is a water spraying assembly (2) arranged on the conveying channel (1), the water spraying assembly (2) comprises a nozzle (3), a water pump driving motor (11), a water pump (12) and a water conveying pipeline (13), the water conveying pipeline (13) is arranged on the conveying channel (1), the input end of the nozzle (3) is connected with one end of the water conveying pipeline (13), the output end of the water conveying pipeline stretches into the conveying channel (1) and is arranged towards a mineral output port (20), the other end of the water conveying pipeline (13) is connected with one end of the water pump (12), and the other end of the water pump (12) is connected with the water pump driving motor (11).
2. The underwater mineral collection mechanism as claimed in claim 1, characterized in that the catching disturbance plates (5) are uniformly arranged on the rotating member, the catching disturbance plates (5) are intermittently arranged on the plane passing through the axis of the drum (7), and the catching disturbance plates (5) on the planes passing through the axis of the drum (7) are staggered.
3. The underwater mineral collecting mechanism as claimed in claim 1, characterized in that a second opening (16) is further arranged in front of the mineral collecting cover (18), the lower side of the second opening (16) is communicated with the first opening (17), the upper side of the second opening extends to the upper side of the rotating member, the capturing disturbance plate (5) extends to the outside of the second opening (16), and the capturing disturbance plate (5) above the rotating member is attached to the top of the mineral collecting cover (18).
4. The underwater mineral collection mechanism as claimed in claim 1, wherein the conveying channel (1) comprises a conveying channel upper cover plate (8), a conveying channel lower cover plate (9) and side plates (10), the conveying channel upper cover plate (8), the conveying channel lower cover plate (9) and the side plates (10) form a long rectangular section channel, and the output end of the nozzle (3) is arranged along the length direction of the long rectangular section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910148523.3A CN109751051B (en) | 2019-02-28 | 2019-02-28 | Underwater ore collecting mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148523.3A CN109751051B (en) | 2019-02-28 | 2019-02-28 | Underwater ore collecting mechanism |
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| CN109751051A CN109751051A (en) | 2019-05-14 |
| CN109751051B true CN109751051B (en) | 2024-03-22 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022055B (en) * | 2019-11-20 | 2021-03-23 | 中国海洋大学 | Hydraulic jet type seabed polymetallic nodule collecting device and method |
| CN111005727B (en) * | 2019-11-20 | 2021-03-02 | 中国海洋大学 | Hydraulic and mechanical combined type seafloor mining equipment |
| CN112983426B (en) * | 2021-03-10 | 2021-12-24 | 中国海洋大学 | Crab-claw-like deep-sea mining ore collecting head |
| CN116988794B (en) * | 2023-09-28 | 2024-02-20 | 长沙矿冶研究院有限责任公司 | Negative pressure acquisition head and negative pressure acquisition equipment |
| CN117005869B (en) * | 2023-10-07 | 2024-02-20 | 长沙矿冶研究院有限责任公司 | Prevent underwater ore collecting device of tuberculosis card stopper |
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| CN1167872A (en) * | 1996-06-07 | 1997-12-17 | 冶金工业部长沙矿冶研究院 | Ocean polymetallic nodule hydraulic acquisition mechanism |
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