Fire-Extinguishing Valve Sealing for Self-Centering Closure Alignment
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Solution Overview
Problem
Valves in industrial sectors, particularly fire-extinguishing systems, face challenges in reliable and repeatable opening and closing behavior, requiring precise positioning of sealing elements for fluid-tight sealing, which increases mounting effort and is prone to misalignment.
Innovation Solution
A valve design featuring a sealing element that completely covers the sealing surfaces, allowing for elastic deformation and radial centering, with a conical shape and annular sealing strip that can adapt to positional errors, and a reversible detachable valve disk for easy maintenance, reducing the need for precise alignment and enhancing sealing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing element is precisely positioned relative to the valve seat to ensure fluid-tight sealing, then sealing reliability is improved, but mounting effort and positioning complexity increase
Solution Approach 1:
The closure body is designed with an L-shaped configuration where the gravity of the closure body itself automatically positions the sealing element against the valve seat during installation. The vertical leg of the L-shape engages with the valve seat while the horizontal leg provides the sealing surface, creating a self-aligning mechanism that eliminates the need for precise manual positioning or additional alignment tools during mounting.
Solution Approach 2:
The sealing element is designed with a curved or conical sealing surface that complements the geometry of the valve seat. This curved interface allows for automatic self-centering and tolerance compensation during mounting, where the geometry guides the closure body into proper alignment with the valve seat, reducing mounting complexity while maintaining sealing reliability.
2Manufacturing precision
If the closure body is mounted in a fixed position to ensure precise alignment, then sealing accuracy is improved, but adaptability to mounting variations and production tolerances deteriorates
Solution Approach 1:
The closure body is designed to be movable relative to the valve housing, allowing it to shift position dynamically during operation. The L-shaped configuration enables the closure body to pivot or adjust its position while maintaining sealing contact with the valve seat, accommodating mounting variations and production tolerances without requiring precise fixed positioning.
Solution Approach 2:
The sealing interface is designed with geometric parameters that allow for position compensation. The L-shaped closure body can change its effective sealing position through pivoting or sliding movements, adapting to variations in mounting alignment while maintaining fluid-tight sealing through the maintained contact between the sealing surfaces.
3Reliability
If a complex positioning mechanism is used to ensure precise closure body positioning, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The L-shaped closure body utilizes its own geometry and gravity to achieve automatic positioning against the valve seat. The vertical leg naturally aligns with the valve seat opening while the horizontal leg provides the sealing surface, eliminating the need for complex external positioning mechanisms, alignment tools, or adjustment devices.
Solution Approach 2:
The L-shaped configuration is an asymmetric geometry that provides inherent positioning functionality. The right-angle configuration creates a unique fit with the valve seat geometry, where only one specific orientation allows proper engagement, automatically ensuring correct positioning without requiring symmetric adjustment mechanisms or complex alignment procedures.
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 ensures reliable and repeatable fluid-tight sealing with reduced mounting effort, improved positional tolerance, and cost-effective maintenance, while maintaining sealing integrity even with slight positional errors, enhancing the usability of the valve in various industrial applications.
Implementation Method 1
an elastically deformable sealing element which is arranged between the sealing surfaces in the blocking state and which completely stretches over one of the sealing surfaces
Implementation Method 2
Both sealing surfaces (13a, 13b) are of conically tapered form in order that radial centering of the closure body (50) relative to the valve seat (12) is achieved
Data Source
AI summary
A valve, having a valve housing which has a fluid inlet chamber and a fluid outlet chamber, having a valve seat which is arranged between the fluid inlet chamber and the fluid outlet chamber, and having a closure body which is movable back and forth between a release position and a blocking position. The closure body abuts against the valve seat in a fluid-tight manner in the blocking position, and wherein the fluid inlet chamber and the fluid outlet chamber are connected to one another in a fluid-conducting manner in the release position. The valve seat and the closure body each have a sealing surface, which are opposite one another in the blocking state, and an elastically deformable sealing element which is arranged between the sealing surfaces in the blocking state and which completely stretches over one of the sealing surfaces.