Rotatable Safety Fitting Coupling for Tool-Free Water Connection
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Solution Overview
Problem
Existing safety fittings for drinking water systems require special tools for connection, making them inconvenient for easy installation and use.
Innovation Solution
A safety fitting design featuring an input coupling with a rotatable second coupling half and actuating levers that allow for a bayonet-like connection to drinking water supply devices without the need for special tools, enabling easy and tool-free installation and use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety fitting uses threaded connections (internal thread on inlet-side section and external thread on outlet-side section) for connecting to drinking water systems, then the connection can be made securely, but special tools are required which complicates the installation process and reduces ease of operation
Solution Approach 1:
The coupling mechanism is divided into two distinct parts: a first coupling half with an internal thread fixedly mounted on the housing, and a second coupling half with an external thread that can be rotated relative to the first coupling half. This segmentation allows the connection process to be broken down into simple rotational movements that can be performed by hand, eliminating the need for special threading tools while maintaining secure connection through the threaded engagement between the two halves
Solution Approach 2:
The second coupling half is designed to be rotatable relative to the first coupling half, transforming the static threaded connection into a dynamic assembly process. This rotational movement allows the connection to be made and adjusted easily by hand, converting a complex tool-dependent operation into a simple manual twisting motion that maintains connection security while dramatically improving installation convenience
Data Source
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AI summary
Safety fitting (10) comprising a housing (11) and a housing cover (12), with a non-return valve (20) for interrupting the connection for a liquid between a first zone (23) and a second zone (24), and with a drain valve (21) for emptying the second zone (24) of the liquid. The safety fitting (10) has an inlet coupling (13) comprising a first coupling half (13a) fixed to the housing (11) and a second coupling half (13b) rotatable relative to the first coupling half (13a) for connecting the safety fitting to an inlet-side supply device for drinking water. The safety fitting (10) has an outlet coupling (14) for connecting the safety fitting to an outlet-side withdrawal device for drinking water.The safety fitting (10) has at least one actuating lever (16) fixedly mounted on the rotatable second coupling half (13b) of the input coupling (13) for rotating the second coupling half (13b) of the input coupling (13) relative to the first coupling half (13a) of the input coupling (13) and relative to the housing (11). Fig. 1.