Pressure Relief Vent Structure for Containing Molten Fusible Alloy
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Solution Overview
Problem
Conventional pressure relief devices for high-pressure vessels release heavy metal fusible alloys into the environment when molten, causing environmental pollution and workplace contamination.
Innovation Solution
A pressure relief device with a cap member and piston member configuration that prevents molten fusible alloys from being discharged outside by routing them into internal chamber parts, thereby containing the fusible alloy within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fusible alloy is used to seal and discharge gas when molten, then the pressure relief device can discharge high-pressure gas to prevent explosion, but heavy metal components are released to the outside causing environmental pollution and workplace contamination
Solution Approach 1:
The device is divided into multiple sealed chambers (first chamber part, second chamber part, third chamber part) with the fusible alloy confined to specific segments. The piston member creates separate compartments that prevent the molten fusible alloy from mixing with the discharged gas, allowing pressure relief while containing contaminants.
Solution Approach 2:
The piston member is inserted into the cap member, and the fusible alloy is nested within the third chamber part of the cap member. This nested structure ensures that when the fusible alloy melts, it remains contained within the inner chambers rather than being discharged externally.
2Reliability
If the fusible alloy is mounted on the third chamber part to support the piston member, then the piston member can be reliably positioned, but when molten the fusible alloy could be discharged to the outside
Solution Approach 1:
The first chamber part and second chamber part are pre-configured as receptacles for the molten fusible alloy. When the fusible alloy melts, these pre-prepared chambers immediately receive and contain the molten material, preventing it from being discharged before the discharge process even begins.
Solution Approach 2:
The piston member acts as an intermediary barrier between the fusible alloy in the third chamber part and the external environment. It allows the fusible alloy to perform its function of supporting and moving the piston while preventing direct contact between the molten alloy and the outside world.
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
Prevents environmental pollution and workplace contamination by ensuring that molten fusible alloys are contained within the device, effectively blocking their release to the outside.
Implementation Method 1
a fusible alloy which is mounted on the third chamber part positioned below the piston member so as to support the piston member so that the piston member is not retracted, and is molten to retract the piston member and open the inlet passage when a surrounding temperature is greater than or equal to a set temperature
Implementation Method 2
a spring installed between the piston member and an inner surface of the mounting part to provide an elastic force in a direction in which the piston member is retracted
Data Source
AI summary
A pressure relief device for a high-pressure vessel comprises: a cap member having a space part formed therein; and a piston member having a first chamber part, and dividing the space part of the cap member into a second chamber part and a third chamber part, and thus, when fusible alloy is molten, the molten fusible alloy sequentially flows into the first chamber part and the second chamber part so that leakage of the molten fusible alloy to the outside can be prevented.