Liquid-Stabilizing Apparatus with Floating Baffles for Cargo Tanks

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Solution Overview

Problem

Conventional liquid cargo tanks face damage from sloshing impacts during ship movement, and existing bevel designs only effectively reduce sloshing under specific loading states, while reducing storage capacity and requiring complex modifications for low-temperature insulation.

Innovation Solution

A liquid-stabilizing apparatus with a guide structure and positioning floating body featuring anti-sloshing members with discontinuous baffles at a fixed angle, which moves with the liquid to maintain perpendicularity and inhibit sloshing without the need for bevels, increasing cargo capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If bevels are formed at the liquid cargo tank to reduce sloshing impact, then sloshing load is reduced under specific loading states, but storage space and storage capability are reduced

Engineering Contradiction:
Improvesloshing impactVSAvoidstorage space
Core Design Contradiction:
Object-affected harmful factorsVSVolume of stationary object

Solution Approach 1:

The invention divides the anti-sloshing function into separate modular components (anti-sloshing members with baffles) that can be independently positioned and adjusted, rather than requiring the tank structure itself to be modified with bevels. This segmentation allows the tank to maintain its full storage volume while still providing sloshing protection through the added modular elements.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention introduces an intermediary device (the anti-sloshing members with baffles) that mediates between the liquid cargo and the tank walls. These members intercept and dissipate sloshing energy before it can impact the tank structure, eliminating the need to modify the tank geometry with bevels and preserving full storage capacity.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If bevels are formed at the liquid cargo tank to reduce sloshing impact, then sloshing load is reduced, but the tank can only effectively withstand sloshing under specific loading states

Engineering Contradiction:
Improvesloshing impactVSAvoidloading state adaptability
Core Design Contradiction:
Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The invention employs dynamic positioning floating bodies that can move vertically along the guide structure in response to changing liquid levels and sloshing conditions. The anti-sloshing members are positioned to adapt to various loading states, maintaining effectiveness whether the tank is partially or fully loaded, unlike fixed bevels that only work under specific conditions.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the parameter of anti-sloshing member position from fixed to variable. By allowing the positioning floating bodies to move along the guide structure, the system adapts to different liquid levels and loading states, maintaining sloshing protection effectiveness across a wide range of operating conditions.

Inventive Principle:
Principle #35Parameter changes

3Object-affected harmful factors

If conventional bevel designs are used to reduce sloshing, then sloshing is reduced under specific conditions, but complex modifications are required for low-temperature insulation and bulkhead processing

Engineering Contradiction:
Improvesloshing impactVSAvoidbulkhead modification complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The invention segments the anti-sloshing function from the tank structure itself, using separate anti-sloshing members that can be installed and adjusted without modifying the bulkhead. This eliminates the need for complex cutting, welding, or reprocessing of the low-temperature resistant bulkhead material, simplifying the overall system while maintaining sloshing protection.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention extracts the anti-sloshing function from the tank structure (bulkhead) and places it in separate, removable anti-sloshing members. This extraction eliminates the need to modify the bulkhead for low-temperature insulation purposes, reducing manufacturing complexity while preserving the sloshing reduction capability.

Inventive Principle:
Principle #2Taking out (Extraction)

4Object-affected harmful factors

If bevels are formed at the liquid cargo tank, then sloshing impact is reduced, but the tank requires complex processing and modification of the bulkhead

Engineering Contradiction:
Improvesloshing impactVSAvoidbulkhead processing ease
Core Design Contradiction:
Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The invention introduces an intermediary anti-sloshing member system that provides sloshing protection without requiring direct modification of the bulkhead. The anti-sloshing members with baffles serve as intermediaries between the liquid and tank walls, eliminating the need for complex bulkhead processing while maintaining manufacturing simplicity.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 apparatus effectively reduces sloshing impacts across various loading states without using bevels, enhancing the tank's loading capacity and minimizing modifications to the low-temperature resistant bulkhead.

Implementation Method 1

a guide structure (11) and a positioning floating body (10). The positioning floating body (10) has buoyancy so as to keep the anti-sloshing members (12) on a liquid surface

Methodology Applied
Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

The anti-sloshing members (12) are provided with discontinuous baffles (121) at a fixed angle

Methodology Applied
Scientific EffectFluid resistance: Drag

Data Source

PatentUS10815052B2Liquid-stabilizing apparatus for liquid cargo tank
Publication Date: 2020.10.27 WISON (NANTONG) HEAVY INDUSTRY CO LTD
  • US10815052B2 patent drawing
  • US10815052B2 patent drawing
  • US10815052B2 patent drawing

AI summary

A liquid-stabilizing apparatus for a liquid cargo tank includes a guide structure. The guide structure is provided with a positioning floating body. The positioning floating body is provided with anti-sloshing members. The anti-sloshing members are provided with discontinuous baffles at a fixed angle. By using the liquid-stabilizing apparatus, the liquid cargo tank is no longer required to have a bevel surface structure, thereby increasing load capacity of the liquid cargo tank and preventing the liquid cargo tank in various loading states from being impacted by liquid cargos.