High Pressure Hose Coupling Termination Attachment Design
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Solution Overview
Problem
Existing high-pressure, large diameter hose coupling methods, such as swage fittings, face challenges including complex and time-consuming operations, risk of heat damage during welding, and potential delamination of the hose due to shear forces, leading to long lead times and equipment downtime.
Innovation Solution
A hose coupling design featuring a crimped or swaged hose-end fitting with a unitary stem and ferrule, and a termination attachment that forms a fluid-tight interface using sealing elements and tapered surfaces, allowing for secure attachment without the need for welding and reducing equipment complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If swage fittings are used to attach end terminations to hoses, then the attachment speed is faster compared to built-in fittings, but the complexity of the swaging operation increases due to the need to remove and reattach large swaging dies
Solution Approach 1:
The fitting is divided into two separate components: a swage fitting that is crimped to the hose, and a termination attachment that is threaded onto the fitting. This segmentation allows the swaging operation to be completed with smaller, manageable dies that remain attached to the equipment, while the termination attachment is added separately through threading.
Solution Approach 2:
The termination attachment is extracted as a separate component from the swage fitting. This allows the swaging operation to focus only on attaching the fitting to the hose, using lighter dies that don't need to be removed, while the termination attachment is added independently through threading.
2Ease of manufacture
If end terminations are welded to the hose-end fitting after swaging, then the welding operation can be performed, but heat from the welding operation may damage the hose and compromise the swage connection integrity
Solution Approach 1:
The termination attachment serves as an intermediary component between the swage fitting and the end termination. It provides a dedicated welding surface that is spatially separated from the hose, allowing welding operations to be performed without the heat affecting the hose or the swage connection.
Solution Approach 2:
The connection system is segmented into three distinct parts: the swage fitting attached to the hose, the termination attachment welded to the end termination, and the threaded connection between them. This segmentation isolates the welding operation from the hose, preventing heat damage while maintaining connection integrity.
3Strength
If the hose is swaged with heavy dies, then the swage operation can be completed, but the hose is crushed and compressed which may delaminate or damage the hose
Solution Approach 1:
The connection system is divided into a swage fitting and a termination attachment. The swage fitting uses lighter crimping dies that apply less crushing force to the hose, reducing the risk of delamination, while the termination attachment is added separately through threading to provide the necessary connection strength.
Solution Approach 2:
The traditional heavy swaging operation is replaced with a lighter crimping operation for attaching the fitting to the hose. The connection strength is then supplemented by the threaded termination attachment, substituting the need for excessive crimping force with a mechanical threading mechanism.
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 reduces the complexity and time of attaching end terminations, minimizes heat damage to the hose, and enables efficient assembly with lighter equipment, thereby decreasing downtime and facilitating the use of various end terminations on a single hose-end fitting design.
Implementation Method 1
The termination attachment may form a fluid-tight interface with the stem. The fluid-tight interface may include a first seal formed by sealing element sealed against opposing surfaces of the stem and the termination attachment.
Implementation Method 2
Additionally or alternatively, the fluid-tight interface may include a second seal formed between opposing tapered surfaces of the stem and the termination attachment.
Implementation Method 3
The hose coupling may include a unitary, one-piece stem, a unitary, one-piece ferrule, and a termination attachment. The ferrule may be attached to the stem.
Data Source
AI summary
A hose coupling for attachment to an end portion of a hose. The hose coupling may include a fitting, a termination attachment, and an end termination. The fitting may be attachable to the end portion of the hose. The fitting may include a ferrule and a stem. The ferrule may be attached to the stem. The termination attachment may be attached to the fitting in opposing relationship to the end portion of the hose. The end termination may be associated with the termination attachment. In some examples, the end termination is threaded, welded, integrally formed, integrally machined, or otherwise associated with the termination attachment.