Pressure Relief Valve Oblique Partition Wall Design
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Solution Overview
Problem
Existing pressure relief valves for domestic water distribution are bulky, complex, and expensive due to their design, which complicates the management of water flows between upstream and downstream orifices.
Innovation Solution
A pressure relief valve with a central chamber having a frustoconical peripheral side wall and an oblique partition wall, featuring a piston actuated by downstream pressure and a return spring, which closes the communication passage when the downstream pressure reaches a maximum limit, allowing for efficient pressure regulation and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radial partition with perpendicular axis is used to separate upstream and downstream chambers, then pressure regulation function is achieved, but the valve becomes bulky, heavy, and complex to machine
Solution Approach 1:
The patent merges the partition wall with the piston rod, eliminating the need for a separate radial partition structure. The piston rod itself serves as the dividing element between upstream and downstream chambers, reducing the number of components and simplifying the overall structure while maintaining effective pressure regulation.
Solution Approach 2:
The piston rod serves multiple functions: it acts as both the actuating element for the valve and the partition wall separating the chambers. This multi-functionality reduces structural complexity and eliminates the need for dedicated partition structures, directly addressing the contradiction between reliability and device complexity.
2Stress or pressure
If radial offset upstream and downstream orifices are used, then pressure differential is achieved, but the valve becomes bulky and expensive to manufacture
Solution Approach 1:
The patent employs asymmetric positioning of the orifices relative to the piston rod, with the upstream orifice offset in one direction and the downstream orifice in another. This asymmetric arrangement achieves the necessary pressure differential while allowing for simpler machining operations compared to complex radial offset configurations.
3Device complexity
If a compact design is pursued, then manufacturing cost is reduced, but pressure regulation reliability may be compromised
Solution Approach 1:
By combining the partition wall function with the piston rod, the patent achieves a compact design that maintains reliable pressure regulation. The merged structure eliminates dead zones and improves fluid communication between chambers while reducing overall valve size and manufacturing complexity.
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 enables effective pressure limiting while reducing the complexity and cost of the valve, ensuring downstream pressure remains below a maximum limit without excessive bulkiness or manufacturing complexity.
Implementation Method 1
a piston carried in sliding manner by said jacket and comprising an actuating part subjected to the downstream pressure against a return spring
Implementation Method 2
The periphery of the partition wall is provided with an annular gasket bearing against said frustoconical part of revolution of the peripheral side wall of the chamber
Data Source
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AI summary
The invention relates to a pressure relief valve to be installed between an upstream and downstream pipe for the flow of a fluid, including: a body (2) in which a chamber (4) having a peripheral sidewall (6) is provided and which includes upstream and downstream tips (8, 9) having upstream and downstream openings (17, 18) leading into the chamber (4) through the sidewall (6); a liner (20) installed in the chamber (4), including a separation wall (26) adjacent to or in contact with a peripheral portion of the sidewall (6) of the chamber (4) and extending between the upstream and downstream openings (17, 18), the liner having a communication passage (31) extending through the separation wall (26); and a piston (33) slidably supported by said liner (20) and including an actuating portion (35) subjected to the downstream pressure against a return spring (52), and a plugging portion (36) capable of closing said communication passage (31) when the downstream pressure reaches a maximum pressure limit (Pmax), the separation wall (26) being arranged obliquely relative to the axis (Y) of the peripheral sidewall (6) of the chamber (4).