Watercraft Drain Insert: Venturi Flow for Hull Water Removal
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Solution Overview
Problem
Watercraft hulls collect water during travel, potentially wetting objects and accumulating excessive water mass, especially when a removable propulsion mechanism is not in use, exposing the hull to the water.
Innovation Solution
A removable insert with a designed aperture and inner cavity utilizes the Venturi effect to create a pressure differential, actively draining water back into the body of water, preventing accumulation on the hull.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the opening is left exposed to receive a removable propulsion mechanism, then the watercraft can easily exchange propulsion mechanisms, but water flows onto the hull and collects in the opening
Solution Approach 1:
The opening is segmented into two functional parts: an upper portion that receives the propulsion mechanism and a lower portion that forms a drain aperture. This segmentation allows the opening to serve dual purposes - accommodating propulsion mechanisms while simultaneously providing a controlled water drainage path that prevents water from flowing onto the hull.
Solution Approach 2:
The drain aperture acts as an intermediary structure between the opening and the hull. It mediates the interaction with water by providing a controlled pathway that allows water to be drained from the opening while preventing it from flowing onto the hull, thus solving the conflict between accessibility and water protection.
2Object-affected harmful factors
If an insert is placed in the opening to prevent water flow, then water is blocked from reaching the hull, but the insert must be removed to install propulsion mechanisms
Solution Approach 1:
The drain aperture is designed with dynamic characteristics that allow it to function automatically during watercraft movement. The aperture's geometry creates a low-pressure zone through the Venturi effect when water flows past it, which passively draws water out of the opening without requiring any active components or blocking structures that would interfere with propulsion mechanism installation.
Solution Approach 2:
The drain aperture performs its water drainage function automatically through the Venturi effect, requiring no additional mechanisms, pumps, or blocking inserts. The system serves itself by using the natural water flow and pressure differential to drain water passively, eliminating the need for manual intervention or removable blocks that would complicate propulsion mechanism installation.
3Object-affected harmful factors
If a pump is used to drain water from the opening, then water is effectively removed from the hull, but the system becomes more costly and complex
Solution Approach 1:
The patent replaces the mechanical pump system with a fluid-dynamic solution based on the Venturi effect. Instead of using a mechanical device to actively pump water out, the design uses the watercraft's movement to create a low-pressure zone that passively draws water out through the aperture, eliminating motors, pumps, and associated mechanical complexity.
Solution Approach 2:
The drain aperture utilizes hydraulic principles by creating a low-pressure zone through water flow (Venturi effect) to drive the drainage process. The pressure differential generated by water moving past the aperture provides the force needed to drain water from the opening, replacing the need for mechanical pumping systems with a purely hydraulic solution.
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 insert effectively prevents water from collecting on the hull by passively draining it using the Venturi effect, reducing the need for costly pumps and allowing easy exchange with propulsion mechanisms.
Implementation Method 1
the structures of the insert can interact with the water displaced by the watercraft in such a way that a low pressure zone is created near the aperture through the Venturi effect. In this low pressure zone, the pressure on one side of the aperture (e.g., the side within the body of water) can be lower than the pressure on the other side of the aperture (e.g., the side within the insert)
Data Source
AI summary
A watercraft includes a hull, an opening extending through the hull, the opening configured to receive a removable propulsion mechanism, and an insert removably insertable into the opening. The insert includes an inner cavity, an aperture configured to be at least partially submerged in a fluid when the watercraft is positioned on the fluid, the aperture being configured to provide fluid communication between the inner cavity of the insert and the fluid as the watercraft travels in a forward direction, and a surface shaped and dimensioned such that a first pressure within the inner cavity is greater than a second pressure at the aperture as the watercraft travels in the forward direction.