Pressure-Vacuum Relief Valve Layout With Removable Flame Arrester
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Solution Overview
Problem
Conventional valve apparatuses with integrated flame arresters face issues such as blockages, complex maintenance, and imbalanced weight distribution, leading to suboptimal performance and increased risk of catastrophic damage in industrial settings.
Innovation Solution
A valve apparatus design featuring discrete pressure and vacuum relief valves with independent operation, a flame arrester element that surrounds the conduit, and a housing configuration allowing for easy maintenance and balanced weight distribution, including a removable end wall for emergency pressure relief and in-situ cleaning nozzles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flame arrester element is integrated into the valve apparatus housing, then protection from deflagration and explosion propagation is improved, but the risk of blockage from airborne solids, moisture, and nesting organisms increases
Solution Approach 1:
The flame arrester element is made removable from the housing, allowing it to be extracted for cleaning or replacement when blocked by airborne solids, moisture, or nesting organisms. This resolves the contradiction by maintaining the protective function while enabling removal of the blockage source.
Solution Approach 2:
The design allows for preliminary cleaning or inspection of the flame arrester element before complete blockage occurs. The removable nature enables routine maintenance to prevent blockages from accumulating to catastrophic levels.
2Reliability
If the flame arrester element is covered by a weather hood, then protection from atmospheric contaminants is improved, but access for maintenance and visual inspection becomes difficult
Solution Approach 1:
The housing is segmented with a removable end wall that provides access to the flame arrester element. This allows the weather hood to remain in place for protection while enabling maintenance personnel to access and inspect the flame arrester element by removing the end wall.
Solution Approach 2:
The removable end wall acts as an intermediary that can be removed to provide access. It mediates between the need for continuous weather protection (when attached) and the need for maintenance access (when removed).
3Reliability
If the valve apparatus is designed with integrated pressure and vacuum relief valves, then comprehensive pressure control is improved, but the weight distribution becomes imbalanced
Solution Approach 1:
The housing and internal components are designed with asymmetric weight distribution compensation. The integrated pressure and vacuum relief valves are positioned and sized to create a balanced center of gravity, or counterweights are incorporated into the housing structure to offset the asymmetric placement of functional components.
4Reliability
If the valve apparatus is designed as an end-of-line device, then protection from externally ignited atmospheric deflagration is improved, but the complexity of integration with piping systems increases
Solution Approach 1:
The flame arrester element, weather hood, and housing are merged into a single integrated assembly that can be installed as one unit at the end of a pipe or container. This reduces integration complexity compared to installing separate components, while maintaining end-of-line protective functionality.
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 design enhances the reliability and maintainability of the valve apparatus, reduces the risk of blockages, and ensures balanced weight distribution, thereby improving performance and safety in preventing deflagrations and explosions in industrial settings.
Implementation Method 1
The flame arrester element is designed principally to prevent flame transmission in the event of an explosion
Implementation Method 2
the valve means is configured to allow the flow of fluid out of the pipe or container if the pressure of the fluid therewithin exceeds a pre-set maximum value
Implementation Method 3
to allow a flow of fluid in to the pipe or container if the pressure of the fluid therewithin is less than a pre-set minimum value
Implementation Method 4
The pressure relief valve and vacuum relief valve are biased toward a closed condition by the mass of the valve plates or pallets of each valve
Data Source
AI summary
A valve apparatus [11] for connection to a tank or pipe, the valve apparatus [11] comprises a housing [12], a first opening [176a] and a second opening [177a] communicating with respective first conduit [16] and second conduit [17] each for providing ingress and egress of fluid into and out of the housing [11] through the first opening [176a] and the second opening [177a], and discrete first and second valve means or valves [14; 15] which are spaced apart from one another, the first and second valve means or valves [14; 15] selectively controlling fluid flow between the first and second conduits [16; 17], wherein, in use, the principal flow axes along the first conduit [16] and second conduit [17] are parallel and opposed, the first valve means or valve [14] is configured to open when the pressure in the first conduit [16] is greater than a first pressure and the second valve means or valve 15 is configured to open when the pressure in the first conduit [16] is less than the first pressure.