Composite Fall Pipe Sections for Deep-Sea Dumping
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Solution Overview
Problem
Existing dumping vessels are limited in the depth they can reach due to the hoisting capacity of their gallows, restricting the length of the fall pipe that can be lowered into the sea.
Innovation Solution
The use of fiber-reinforced plastic fall pipe sections with connectors and metal inserts allows for a deeper fall pipe by reducing the weight of each section while maintaining strength, enabling more sections to be suspended from the gallows without upgrading the hoisting facilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel fall pipe sections are used, then the fall pipe has sufficient strength, but the weight is high which limits the number of sections that can be hoisted
Solution Approach 1:
The fall pipe sections use composite construction with a steel core providing structural strength and an outer layer of fiber reinforced plastic providing protection and additional strength-to-weight ratio. This composite structure maintains the required strength while significantly reducing the overall weight compared to full steel construction, enabling more sections to be hoisted by the existing gallows capacity.
2Length of moving object
If more fall pipe sections are stacked to reach greater depths, then the fall pipe length increases, but the hoisting capacity of the gallows is exceeded
Solution Approach 1:
By using fiber reinforced plastic composite material for the fall pipe sections, the weight per unit length is reduced while maintaining structural integrity. This allows stacking more sections (e.g., 10-12 sections of 8 meters each) to achieve greater depths (80-100 meters) without exceeding the hoisting capacity of the existing gallows.
3Weight of moving object
If fiber reinforced plastic is used for the tube, then the weight is reduced, but the connection strength with metal connectors must be ensured
Solution Approach 1:
The fall pipe section uses composite construction with a steel core providing structural strength and an outer layer of fiber reinforced plastic providing protection and additional strength-to-weight ratio. This composite structure maintains the required strength while significantly reducing the overall weight compared to full steel construction, enabling more sections to be hoisted by the existing gallows capacity.
Solution Approach 2:
A metal insert or transition piece is used as an intermediary element between the fiber reinforced plastic tube and the metal connectors. This intermediate component provides a reliable mechanical connection interface, allowing the connectors to be firmly attached to the plastic tube while maintaining the weight advantages of the composite structure.
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
This configuration enables the construction of a longer fall pipe that can reach greater depths, facilitating accurate and efficient dumping of materials like sand, rocks, or stones on the sea floor without requiring modifications to the hoisting equipment.
Implementation Method 1
the tube comprises a circumferential wall having at least one layer of fiber reinforced plastic
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
Dumping vessel for dumping sinking particles like sand, blocks, rocks or stones onto the bottom of a lake or sea, comprising a floating hull and a fall pipe pending downwards towards the bottom, wherein the fall pipe comprises a lower dumping section and a series of fall pipe sections that are stacked onto each other on the dumping section, wherein multiple fall pipe sections each comprise a tube and an upper connector and a lower connector that are joint with the tube, wherein the upper connector and the lower connector of subsequent fall pipe sections engage each other, wherein the tube comprises a circumferential wall having at least one layer of fiber reinforced plastic.