River-Bottom Intercepting Net with Lead-Core Anchoring for Reversing Currents
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Solution Overview
Problem
Existing intercepting nets in aquatic research and culture fail to effectively prevent large aquatic organisms from escaping due to detachment from the river bottom, and they are prone to floating and drifting under reversing current conditions.
Innovation Solution
An intercepting net design featuring a net body with anti-floating and anti-drifting rope assemblies, mounting frames, and specific anti-escape net portions, which includes lead-core ropes, UHMWPE materials, and a double main rope structure to secure the net to the river bottom and resist current forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the intercepting net is deployed by fixing its two sides to the bank bases without connection structure between net bottom and river bottom, then the deployment is simple, but the net is prone to floating and drifting under reversing current
Solution Approach 1:
The anchoring system is divided into multiple independent lead-core ropes distributed along the net bottom, with each rope providing localized anchoring. This segmentation allows the net to maintain stability through distributed forces rather than a single complex connection structure.
Solution Approach 2:
Lead-core ropes serve as intermediary elements between the net bottom and the river bottom. These ropes transmit and distribute the forces from the reversing current, preventing direct contact between the net and river bottom while maintaining stability.
2Device complexity
If the net bottom is detached from the river bottom, then the net structure is simpler, but aquatic organisms can escape through the bottom
Solution Approach 1:
Lead-core ropes act as intermediary anchoring elements that prevent organism escape without requiring direct net-to-river-bottom contact. The ropes transmit forces and prevent bottom detachment while maintaining structural simplicity.
Solution Approach 2:
The lead-core ropes provide counterbalancing forces to prevent the net bottom from detaching due to current forces or organism pressure, effectively counteracting the forces that would cause escape without adding complex structure.
3Reliability
If lead-core ropes with higher weight are used, then the anti-floating and anti-drifting performance is improved, but the material cost and installation difficulty increase
Solution Approach 1:
The weight parameter of lead-core ropes is optimized within a specific range (1.3-4.7 kg/m) to achieve the necessary anti-floating performance without excessive weight. This parameter optimization balances effectiveness with ease of installation and material cost.
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 solution effectively prevents aquatic organisms from escaping and avoids net floating, ensuring the net remains securely anchored under reversing currents, thereby enhancing the reliability of aquatic research and culture operations.
Implementation Method 1
a weight of each of the plurality of lead-core ropes is 1.3-4.7 kg/m
Data Source
AI summary
An intercepting net based on reversing current motion at a river bottom, including a net body connected to ropes arranged in a crisscross manner, an anti-floating and anti-drifting rope and a mounting frame. A top of the net body is connected to a main rope and an auxiliary rope arranged side by side. The anti-floating and anti-drifting rope includes lead-core ropes arranged in a crisscross manner and connected to the ropes. The net body includes a vertical interception portion, whose bottom is connected to a first anti-escape net portion extending in a first direction and a second anti-escape net portion extending in a second direction opposite to the first direction. First anti-floating and anti-drifting chains are sequentially fixed on the first anti-escape net portion along the first direction. Second anti-floating and anti-drifting chains are sequentially fixed on the second anti-escape net portion along the second direction.