Sprinkler Wrench Protective Cover for Coated Fire Sprinklers
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Solution Overview
Problem
Current sprinkler wrenches often mar or scratch the coating of coated fire sprinklers during installation due to small point contact and thin coatings, leading to damage.
Innovation Solution
A protective cover boot made from flexible materials like rubber or silicone that slips onto the sprinkler wrench, providing a protective layer between the wrench and the sprinkler to prevent marring and scratching, and can be easily replaced when worn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a standard sprinkler wrench is used to install coated fire sprinklers, then the installation process can be completed efficiently, but the coating on the sprinkler becomes marred or scratched due to small point contact and thin coating
Solution Approach 1:
A protective cover is introduced as an intermediary component between the sprinkler wrench and the coated sprinkler. The cover slips over the wrench head and provides a larger surface area contact with the sprinkler frame, preventing direct contact between the wrench and the delicate coating. This mediator resolves the contradiction by enabling efficient torque application while protecting the coating from damage.
Solution Approach 2:
The protective cover is made from flexible material that can deform under torque application. This flexibility allows the cover to conform to the sprinkler frame while distributing the contact pressure over a larger area, preventing point contact damage to the coating. The flexible nature maintains installation efficiency while protecting the sprinkler surface.
2Force
If torque is applied to turn the sprinkler into the fitting using the wrench, then the installation function is achieved, but the small point contact area concentrates force and damages the thin coating
Solution Approach 1:
The protective cover transitions the contact from a one-dimensional line contact (wrench flat areas) to a two-dimensional surface contact. By adding this dimensional element, the contact pressure is distributed over a larger area, reducing the stress concentration that causes coating damage while maintaining the necessary torque application capability.
Solution Approach 2:
The protective cover changes the physical parameters of the contact interface by increasing the contact area and reducing contact pressure. This parameter change allows sufficient torque to be applied for installation while keeping the pressure below the threshold that would damage the thin coating, resolving the force-stress contradiction.
Data Source
AI summary
A sprinkler wrench for installing a sprinkler includes a base having a tool engaging portion. A sidewall extends from the base and a sprinkler engaging portion extends from the sidewall. The sprinkler engaging portion includes a pair of oppositely facing surfaces defining an outer perimeter and a recess including two opposing flats. A protective boot cover is removably attached to the sprinkler engaging portion and includes flat cover portions covering the two opposing flats.