Push-In Fire Sprinkler Connection Mechanism
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Solution Overview
Problem
Conventional fire protection sprinklers require multiple connections and threaded connections, which increase installation time, labor, and the risk of leakage, and do not allow for easy removal or inspection.
Innovation Solution
A fire protection sprinkler with a push-in connection mechanism that eliminates the need for threads and thread sealants, using seals located on the sprinkler and a retaining clip for secure attachment to a pipe outlet, allowing for easy installation and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional threaded connections are used to connect sprinklers to pipes, then the connection is secure and reliable, but the installation time and labor increase significantly
Solution Approach 1:
The patent extracts and eliminates the threading operation from the connection process. Instead of requiring threads to be cut and assembled, the sprinkler body is designed with a push-in connection that inserts directly into the pipe fitting, removing the time-consuming threading step while maintaining connection security through internal sealing mechanisms
Solution Approach 2:
The patent replaces the mechanical threading system with a push-in insertion mechanism. The threaded connection system is substituted by a direct insertion method where the sprinkler body is pushed into the pipe fitting, and sealing is achieved through elastomeric seals rather than thread engagement, significantly reducing installation time
2Reliability
If multiple connections and threaded components are used, then the connection is secure, but the number of components and device complexity increase
Solution Approach 1:
The patent merges multiple separate components into a single integrated sprinkler body design. The connection mechanism, sealing elements, and sprinkler functionality are combined into one unit that connects to the pipe fitting through a single push-in action, eliminating the need for separate thread sealants, locking nuts, and other auxiliary components
Solution Approach 2:
The push-in connection design serves multiple functions simultaneously: it provides mechanical attachment, creates a fluid seal, and allows for easy installation and removal. The elastomeric seal performs both sealing and shock absorption functions, while the push-in mechanism provides both attachment and alignment functions
3Reliability
If conventional threaded connections with sealants are used, then the connection is sealed, but the risk of leakage increases due to multiple connection points
Solution Approach 1:
The patent extracts and eliminates thread sealants from the connection system. By removing the threaded interface, the need for thread sealants, tape, or compound is eliminated, thereby removing a potential source of leakage. The sealing function is transferred to elastomeric seals that are extruded into the connection interface
Solution Approach 2:
The patent uses elastomeric seals (flexible material) that are extruded into the connection interface between the sprinkler body and pipe fitting. These flexible seals conform to the mating surfaces and provide a reliable leak-free barrier, replacing the rigid thread-to-thread sealing method that requires sealants
4Reliability
If threaded sprinkler bodies are used, then the connection can be made secure, but the ability to accommodate grooved connections and ease of removal is reduced
Solution Approach 1:
The push-in connection design is universally compatible with grooved pipe fittings and provides a standardized interface that can be used across different sprinkler applications. The connection mechanism accommodates the grooved fitting geometry while maintaining secure attachment, and the same design allows for easy removal by simply pulling the sprinkler body out of the fitting
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 push-in connection mechanism reduces installation time and labor, minimizes leakage risks, and enables easy inspection or replacement of sprinklers without damaging seals during welding.
Implementation Method 1
an elastomeric seal that creates a fluid barrier between the sprinkler body and the pipe fitting
Implementation Method 2
a retainer clip that engages with a groove in the pipe fitting
Data Source
AI summary
A fire protection sprinkler with a push-in connection includes a sprinkler body having an input orifice for receiving fluid and an output orifice for outputting the fluid, the body having a push-in connection at the input end and a base portion. The push-in connection is adapted to be connected to a pipe fitting by insertion and has a plurality of recesses, a first recess having a first gasket, a second recess having a second gasket, and a third recess having a retaining clip. A frangible element is held in place by a set screw and a stopper. The frangible element is designed to fail at a predetermined temperature to release the stopper. A deflector is positioned on the base portion and configured to direct the output fluid toward the output end, upon activation of the sprinkler by failure of the frangible element at the predetermined temperature.