Push-to-Connect Sprinkler Fittings for Precise Deflector Positioning
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Solution Overview
Problem
Existing fire protection sprinkler systems face challenges in adjusting the position of sprinklers within confined spaces, such as behind walls or ceilings, due to limited adjustability and the complexity of threaded connections, which can require specialized tools and even removal of structural elements.
Innovation Solution
The development of adjustable fire protection sprinkler assemblies using threadless push-to-connect fittings that allow for axial translation and fluid-tight sealing, enabling precise positioning of sprinklers relative to mounting surfaces without the need for threaded connections, and incorporating a releasing member to disengage the grip for easy adjustment and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded connections are used to secure sprinklers to pipe fittings, then fluid-tight connection is achieved, but adjustability and ease of installation are reduced
Solution Approach 1:
The connection system is divided into separate components: a push-fit coupling that provides fluid-tight sealing and a separate retaining mechanism (such as a collet or gripper) that provides mechanical retention. This segmentation allows the sprinkler to be easily inserted and removed while maintaining reliable sealing during operation.
Solution Approach 2:
The connection system transitions from a static threaded connection to a dynamic push-fit system where the sprinkler can be easily inserted and removed. The retaining mechanism dynamically adjusts to hold the sprinkler in place during operation while allowing quick release when needed, providing both reliability and ease of operation.
2Reliability
If threaded connections are used in confined spaces, then secure connection is achieved, but installation complexity increases due to need for specialized tools and potential structural removal
Solution Approach 1:
The complex threading operation and specialized tools are extracted from the installation process. The push-fit coupling allows direct insertion of the sprinkler into the fitting without requiring threading operations, special tools, or structural modifications, significantly simplifying installation in confined spaces.
Solution Approach 2:
The mechanical threading system is replaced with a push-fit mechanical system that uses interference fits, elastomeric seals, and collet-style retainers. This substitution eliminates the need for threaded connections and associated complexity while maintaining secure, reliable connections in confined spaces.
3Reliability
If minimal adjustability is provided with threaded connections, then fluid-tight engagement is ensured, but positioning precision is limited
Solution Approach 1:
The connection system provides dynamic adjustability along the axial direction, allowing the sprinkler to be positioned at various distances from the mounting surface. The retaining mechanism maintains fluid-tight engagement while permitting precise positioning adjustments to achieve optimal deflector-to-mounting-surface spacing.
Data Source
AI summary
Adjustable fire protection assemblies and methods are provided. The assembly includes a sprinkler having a body with an outer encasing surface and a deflector supported from the body. An escutcheon having a receiver and a rim surround the fire protection sprinkler to define an aperture between the receiver and the sprinkler. A push-to-connect fitting of the assembly includes a tubular member with an end for connection to a pipe and an internal conduit that receives the sprinkler body. A seal member and a retaining ring are disposed within the tubular member to form an adjustable seal and grip about the sprinkler body. A releasing member translates to disengage the retaining ring from the sprinkler body; and the escutcheon translates with respect to the tubular member in a sliding surface engagement to define an adjustable deflector-to-rim distance between the rim of the escutcheon and the deflector of the sprinkler.