Anti-siphoning Valve Device Prevents Backflow Contamination
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Solution Overview
Problem
Existing fluid distribution systems face contamination risks due to backflow of external, potentially contaminated fluids when pressure drops in the distribution piping system, which can lead to the distribution of contaminated water, especially in tap water networks.
Innovation Solution
A manually operable tap valve device with an improved anti-siphoning function, featuring a housing body with a first ridge member that cooperates with a movable valve member to form cavities, preventing backflow by maintaining fluid containment even when pressure drops, and allowing for simplified production and attachment of semi-manufactured valve units for anti-siphoning and check valve functionalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional anti-siphoning valve is used, then backflow prevention is provided, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the anti-siphoning valve function with the check valve function into a single integrated valve unit. The valve member serves dual purposes: it prevents backflow into the distribution piping system (anti-siphoning function) and prevents outward flow of treated water (check valve function). This merging eliminates the need for separate valve components, reducing device complexity and manufacturing cost while maintaining reliable backflow prevention
Solution Approach 2:
The valve member is designed with multi-functionality, serving both as an anti-siphoning valve and a check valve. By making the same component perform multiple functions, the patent reduces the overall number of parts needed in the system, thereby simplifying the device structure and lowering manufacturing complexity while ensuring continuous protection against contamination
2Reliability
If a through-flow anti-siphoning valve arrangement is implemented, then fluid containment is maintained, but the manufacturing process becomes more complex
Solution Approach 1:
The patent divides the valve body into separable components: a first part containing the inlet connection and valve member, and a second part containing the outlet connection. These parts can be manufactured independently using standard molding or machining processes, then assembled together. This segmentation allows each part to be produced using simpler, more cost-effective manufacturing methods while still achieving the complex through-flow anti-siphoning function when assembled
Solution Approach 2:
The valve member is positioned within the valve body such that it nests between the first and second parts. The valve member fits into a cavity formed by the combined parts, creating a compact integrated structure. This nesting arrangement allows the complex multi-functional valve to be constructed from simpler individual components that can be manufactured separately and then assembled
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
Effectively prevents contamination of the fluid distribution system by blocking backflow from external sources during pressure drops, ensuring the delivery of clean water by maintaining fluid containment and allowing for efficient reflux prevention without complex production processes.
Implementation Method 1
when the fluid pressure in the distribution piping system drops, there is a risk of an amount of external fluid flowing back into the distribution piping system through the delivery pipe
Data Source
Figure 1
Figure 2A~2C
Figure 2AA~2CC
AI summary
A through-flow anti-siphoning valve device (70) adapted to be mounted in an environment having an ambient pressure level (PA60); the valve device comprising: a valve housing (100, 200) having: an input (210) for connection to a fluid supply piping system (35, 72) having a fluid supply pressure level (PO; PO1; P35:1) for delivery of a first fluid; an output (220A) for attachment to a valve unit part (45B); and a housing body (100, 200, 130) positioned between the input (210) and the output (220), said housing body forming a first channel (105) for connecting the input (210) with the output (220); and a valve unit (130) having a transit channel (180) communicating with said environment, a first valve seat (140, 241), and a movable valve member (131) having a first valve member surface (132, J, K) facing the first channel (105) and a second valve member surface (133) facing the transit channel entry and the first valve seat (140, 241), and wherein the valve unit (130), in operation, is capable of switching between a first state and a second state dependent on a force difference (DeltaF) between a first force (Fl) dependent on fluid pressure (PF, Po, P410) acting on said first valve member surface (132, J, K), and a second force (F2) dependent on fluid pressure (PA) acting on said second valve member surface (133), wherein the output (220A) comprises another valve seat enclosing an outlet orifice, said outlet orifice constituting an outlet end of the channel (105); wherein said another valve seat is shaped so as to enable sealingly meeting a second movable valve member for controlling a flow of said first fluid through said outlet orifice.