Sanitary Fitting Check Valve Venting Mechanism
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Solution Overview
Problem
Existing devices for checking the tightness of non-return valves in sanitary fittings, especially those upstream of domestic thermostatic mixing valves, are difficult to use and not aesthetically pleasing, with high production costs.
Innovation Solution
A fluid supply connection with a device that shuts off water and checks the tightness of a non-return valve by venting the pipe between the shut-off device and the valve, featuring a hollow cylindrical upstream element with a threaded stud, a flared housing, and a threaded sleeve with O-rings and radial orifices, allowing for effective leak detection and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing devices for checking non-return valve tightness are used, then the valve can be checked without dismantling, but the devices are difficult to use, aesthetically unpleasing, and have high production costs
Solution Approach 1:
The invention combines the shut-off function and the checking function into a single integrated device. The purging device is merged with the shut-off valve body, eliminating the need for separate checking equipment and making the operation simpler and more aesthetically pleasing while maintaining the capability to check non-return valve tightness.
2Reliability
If existing checking devices are used, then non-return valve can be checked without dismantling, but production cost is high
Solution Approach 1:
By integrating the checking function into the existing shut-off valve structure, the invention eliminates the need for separate checking devices, thereby reducing production costs while maintaining the capability to check non-return valve tightness without dismantling.
Solution Approach 2:
The shut-off valve is designed to perform multiple functions: shutting off water flow and checking non-return valve tightness. This multi-functionality reduces the need for additional specialized equipment, lowering production costs while maintaining checking capability.
3Measurement precision
If non-return valve is checked by venting the pipe, then tightness can be effectively checked, but water must be shut off first
Solution Approach 1:
The device is designed so that the shut-off action and the purging/checking action are integrated and can be performed in a predetermined sequence through a single operating mechanism. The preliminary shut-off is automatically performed as part of the checking operation, eliminating the need for separate manual shut-off steps and reducing time loss.
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
Facilitates easy and effective checking of non-return valve tightness without disassembly, providing an aesthetically pleasing and cost-effective solution for maintaining sanitary fittings.
Implementation Method 1
two grooves, one upstream and the other downstream, lined with O-rings
Implementation Method 2
an upstream thread of the sleeve receives a threaded ring
Implementation Method 3
a flared housing with a smooth interior
Implementation Method 4
one or more radial orifices being made between the two grooves so as to cause the interior of the flared casing to communicate with the interior space of the sleeve
Data Source
Figure 1
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AI summary
Fluid supply fitting for sanitary taps with a non-return valve, including a device for shutting off the water and checking the tightness of said non-return valve by venting the pipe located upstream of the non-return valve. This fitting comprises, on the one hand, a hollow cylindrical upstream element (1) which has a thread on its external wall for screwing into a fluid pipe and which is extended downstream by a flared housing (3) with a smooth interior, and, on the other hand, a hollow cylindrical downstream element (2), called a sleeve, threaded, the upstream part of which has a tapped hole that is fixed to a threaded stud (4) located in the bottom of the recess in the flared housing (3). Application in the field of sanitary taps.