Axial Strap Duct Joint Protection Assembly
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Solution Overview
Problem
Conventional duct coupling systems fail to maintain sufficient compressive force, leading to rapid separation of duct sections under high pressure, which can cause undesirable depressurization and damage to surrounding structures.
Innovation Solution
A joint protection assembly using axial straps that form loops around coupling elements to apply a compressive force between adjacent duct sections, preventing rapid separation and maintaining joint integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional couplings relying on friction are used to connect duct sections, then the device complexity is reduced, but the reliability of maintaining compressive force deteriorates leading to coupling failure under high pressure
Solution Approach 1:
The coupling system is segmented into multiple independent axial straps (typically 2-4 straps) that collectively provide the compressive force. Each strap acts as an independent load-bearing element, so if one strap fails, the others continue to maintain the compressive force on the duct joint, significantly improving system reliability while keeping individual strap complexity low
Solution Approach 2:
The axial straps are pre-tensioned to apply compressive force to the duct joint before high-pressure fluid flow occurs. This pre-application of compressive force creates a mechanical constraint that prevents duct section separation even when coupling failures occur, cushioning against the harmful effects of pressure-induced decoupling
2Object-affected harmful factors
If structural shielding systems are used to protect sensitive structures from ducts, then protection of sensitive structures is improved, but the weight and ease of manufacture deteriorate
Solution Approach 1:
The protective function is extracted from a separate structural shielding system and integrated directly into the coupling mechanism itself. The axial straps and coupling elements form the primary barrier between the duct and sensitive structures, eliminating the need for additional heavy shielding components while maintaining protection from heat and moisture
Solution Approach 2:
The coupling assembly serves multiple functions simultaneously: it connects duct sections, maintains compressive force to prevent separation, and provides protective shielding for nearby sensitive structures. This multi-functionality eliminates the need for separate dedicated shielding components, reducing overall system weight
3Ease of operation
If conventional friction-based couplings are used, then ease of operation is improved, but the duration of action deteriorates leading to rapid decompression upon failure
Solution Approach 1:
The axial straps are installed and pre-tensioned to establish compressive force on the duct joint before the duct system operates under high pressure. This preliminary action ensures that when high-pressure fluid flow occurs, the joint is already constrained and will not rapidly separate, extending the duration of joint integrity maintenance even if coupling components fail
Solution Approach 2:
The pre-applied compressive force from the axial straps acts as a cushion that prevents rapid decompression. In the event of coupling failure, this pre-established mechanical constraint slows the rate of separation between duct sections, extending the time for pressure equalization and preventing sudden decompression events
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 extends the time of decompression and protects sensitive structures by maintaining the integrity of the duct joint, allowing for slow and controlled fluid release in the event of a coupling failure.
Implementation Method 1
A compressive force is applied to the first and second ducts to maintain the integrity of the joint
Data Source
AI summary
Methods and systems for protecting a duct joint are provided. An assembly for protecting a joint formed between a first duct and an adjacent second duct includes a first coupling element coupled about the first duct and a second coupling element coupled about the second duct. The assembly also includes a plurality of axial straps coupled between the first coupling element and the second coupling element such that each axial strap of the plurality of straps forms a loop that encircles a portion of each of the first coupling element and the second coupling element.