Hinged Clamp Assembly for Removable Damper Access in Duct Systems
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Solution Overview
Problem
Ventilation duct systems, particularly those containing dampers like fire dampers, face challenges in accessing internal components for inspection, maintenance, and repair due to limited accessibility through traditional access doors, making routine maintenance and replacement cumbersome and costly.
Innovation Solution
A clamp assembly and damper access assembly that includes an annular clamp member and a hinge, allowing for the removable coupling of a damper access duct section to an adapter and ductwork, enabling direct access to internal components without dismantling the duct system, and featuring a breakaway connection to maintain damper integrity in emergency situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a small access door is used in the ductwork to provide access to the fire damper, then the ductwork can be protected from dismantling, but the visibility and accessibility of the fire damper and link are limited, making inspection, maintenance, and repair awkward and difficult
Solution Approach 1:
The clamp assembly divides the ductwork into separable sections using a multi-component clamp structure that can be independently installed and removed, allowing access to the fire damper without dismantling the entire duct system
Solution Approach 2:
The clamp assembly acts as an intermediary connection device between ductwork sections, providing a removable joint that facilitates access to the fire damper while maintaining the integrity of the overall duct system
2Ease of operation
If the access door is located in proximity to the fire damper to provide access, then the fire damper can be reached, but the location and orientation of the door make inspection, maintenance, and repair awkward and difficult
Solution Approach 1:
The clamp assembly separates the ductwork into removable sections, eliminating the need for a fixed access door and allowing direct access to the fire damper through simplified duct section removal
Solution Approach 2:
The clamp assembly provides a dynamic, removable connection rather than a fixed access door, allowing the duct sections to be easily separated and reconnected based on maintenance needs
3Strength
If the clamp assembly uses lateral portions that extend the full circumferential length, then the connection between duct sections would be more secure, but the clamp would be more difficult to install and remove
Solution Approach 1:
The clamp assembly divides the clamping structure into discrete lateral portions spaced around the circumference, providing sufficient connection strength while leaving gaps that facilitate easy installation and removal
Solution Approach 2:
The lateral portions extend only partially around the circumference rather than the full length, providing adequate clamping strength for secure connection while reducing the complexity of installation and removal
Data Source
AI summary
A clamp assembly is provided for use in a duct system. The clamp assembly includes a clamp member including a base portion and first and second lateral portions. The first and second lateral portions extend less than the full circumferential length of the base portion. The clamp assembly may include a first member, a second member, and a hinge operatively coupling the first member to the second member. A damper access assembly includes an adapter, a damper access duct section, and an annular clamp member. A first flange of the adapter and a second flange of the duct section are configured to form a generally T-shaped joint between the adapter and the damper access duct section. The clamp member is configured to removably secure the adapter to the damper access duct section. The damper access duct section is configured to be removable relative to the damper enclosure and the ductwork.