Dynamic Buoyancy System for Deep-Sea Mining Vehicle
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Solution Overview
Problem
Current deep-sea mining systems face challenges such as extreme pressures and the need for reliable ore transportation, which can cause environmental damage due to seabed contact during mining.
Innovation Solution
A dynamic buoyancy system that allows deep-sea mining systems to hover above the seabed, using variable buoyancy techniques and large pressure vessels to descend, collect ore nodules, and ascend without seabed contact, thereby minimizing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If seabed dredging collector systems are used to pump ore to the surface, then ore transportation is achieved, but environmental damage occurs due to seabed disturbance
Solution Approach 1:
The patent introduces an intermediary mechanism (suction head and slurry pump system) that collects ore nodules from the seabed and transports them through riser pipes to the surface, avoiding direct contact between the mining vehicle and continuous seabed disturbance. The slurry transport system acts as a mediator between the seabed collection point and the surface destination.
Solution Approach 2:
The patent replaces traditional mechanical dredging systems with a hydraulic slurry transport system. Instead of using mechanical conveyors or belts to move ore, the system uses fluid dynamics to suspend and transport ore nodules as slurry through vertical riser pipes, reducing mechanical disturbance to the seabed.
2Reliability
If mechanical lifting systems with synthetic ropes are used, then ore can be transported to the surface, but the system lacks scalability and causes environmental damage
Solution Approach 1:
The mining system is divided into modular components: multiple mining vehicles can operate independently, each with its own slurry pump and riser pipe system. This segmentation allows the system to be scaled by adding or removing individual vehicle units rather than requiring a complete system redesign, enabling flexible deployment from single-vehicle to multi-vehicle operations.
Solution Approach 2:
The mining vehicles are designed with universal, multi-functional capabilities: they can collect ore nodules, process them into slurry, and transport themselves to different locations on the seabed. The same vehicle platform can operate alone or as part of a fleet, and the slurry pump system can handle varying ore loads, providing adaptability across different operational scales.
3Productivity
If mining vehicles contact the seabed during collection, then ore nodules can be gathered efficiently, but environmental harm increases
Solution Approach 1:
The patent extracts the ore collection function from direct vehicle-seabed contact. The suction head is positioned close to the seabed to efficiently gather ore nodules, but the vehicle body remains elevated above the seabed surface. This separation allows efficient ore extraction while minimizing the vehicle's mechanical footprint and disturbance to the seabed ecosystem.
Solution Approach 2:
The suction head and collection apparatus use flexible, adaptive structures that can closely follow the seabed topography to maximize ore collection efficiency. These flexible collection elements can conform to irregular seabed surfaces and navigate around obstacles, maintaining high collection productivity while the rigid vehicle body remains elevated and causes minimal disturbance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The dynamic buoyancy system enables efficient and sustainable deep-sea mining by reducing seabed contact, allowing for scalable and redundant operations, and minimizing environmental harm.
Implementation Method 1
The dynamic buoyancy system applies variable buoyancy conditions that allow the deep-sea mining system to descend, collect ore nodules from the seabed, and ascend
Implementation Method 2
employs large pressure vessels designed to work at the planned ocean depths
Data Source
AI summary
A buoyancy system for an underwater autonomous vehicle is provided. The buoyancy system includes one or more spherical pressure vessels with each vessel comprising two hemispherical pieces mechanically or adhesively connected together at a seam joint. Further, each vessel includes one or more bulkhead feedthroughs for connecting the vessels to external components and sensors of the buoyancy system. The buoyancy system also includes: (i) a primary pump connected to at least one of the one or more vessels to pump sea water from the one or more vessels; (ii) a pressure sensor connected to at least one of the one or more vessels; and (iii) a level sensor extending through all or a first subgroup of the one or more spherical pressure vessels to detect the level of sea water inside the one or more vessels.