Fire Sprinkler Protective Cap with External Tool Path
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Solution Overview
Problem
Existing protective devices for fire protection sprinklers are complex and cumbersome, making installation and handling difficult, and they do not adequately protect operational components during storage, transport, and installation, as they often expose these components to damage or interference from external elements like paint spray.
Innovation Solution
A protective cap design for fire protection sprinklers that includes an insertion end portion with a first wall and a shielding end portion, featuring a tool path outside the cap chamber to minimize exposure of operational components, with an internal baffle to house the fluid deflection member and thermally responsive trigger, and a driver member to facilitate tool access and alignment without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing protective devices are used, then protection is provided, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The protective device is divided into a protective cap and a separate tool, allowing each component to be optimized independently. The cap provides protection while the tool provides access, eliminating the need for complex integrated designs.
Solution Approach 2:
The protective cap is designed to be inserted into the support cup, with the cap's external diameter being less than the internal diameter of the support cup. This nesting arrangement allows the cap to fit within the existing sprinkler assembly without adding external complexity.
2Reliability
If existing protective devices are used, then protection is provided, but ease of operation deteriorates due to cumbersome handling
Solution Approach 1:
The tool engagement features are extracted from the sprinkler frame and placed on the protective cap itself. This allows the cap to be removed and handled independently using its own engagement features, without requiring access through the cap's opening.
Solution Approach 2:
The protective cap is designed with pre-formed tool engagement features that align with the support cup's openings before installation. This preliminary alignment simplifies the installation process by eliminating the need for complex alignment procedures during installation.
3Ease of operation
If cover plate assembly is removed for tool access, then ease of operation improves, but operational components are exposed to damage
Solution Approach 1:
The protective cap serves as an intermediary between the tool and the operational components. It provides a interface for tool engagement while maintaining protection of the internal components, eliminating the need to remove the cover plate assembly for tool access.
4Ease of operation
If protective cap allows tool access, then ease of operation improves, but operational components remain exposed to external elements
Solution Approach 1:
The protective cap is designed with localized openings that provide minimal necessary access for tool engagement while maintaining overall protection. The openings are positioned and sized to allow tool passage while minimizing exposure of operational components to external harmful elements like paint spray.
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 provides enhanced protection for operational components by minimizing exposure and facilitating easier installation and handling, while allowing tool access and alignment without the complexity of existing designs, thus reducing the risk of damage and interference.
Implementation Method 1
a thermally responsive trigger arrangement to support the seal and define an unactuated state of the sprinkler
Implementation Method 2
When in the presence of a sufficient level of heat, the cover plate solder fuses, and the cover plate separates from the retainer ring
Implementation Method 3
the cover plate solder fuses, and the cover plate separates from the retainer ring thereby permitting the deflector to drop down
Data Source
AI summary
Installation and protective devices for a fire protection sprinkler assembly having a support cup disposed about the sprinkler assembly. A protective cap engages the support cup to protect the sprinkler and facilitate its installation. The protective cap has an insertion wall that defines a cup chamber to house the sprinkler therein and protect operational components of the sprinkler during storage, transport, installation and when awaiting to be placed into service. The protective cap includes a plurality of slots formed externally and peripherally to the insertion wall to provide tool access to a tool path between the insertion wall and the inner surface of the support cup. The protective cap includes a shielding wall axially adjacent the insertion wall that circumscribes the central cap axis to shield the slots of the protective cap and the tool path.