Multistage Hydrogen Tank Vent Valve for Low-Force Safe Discharge
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Solution Overview
Problem
Liquefied hydrogen storage tanks face safety risks due to pressure increases from evaporated hydrogen gas, requiring frequent gas discharge to prevent potential explosions, and existing gas discharge apparatuses often require significant force to open and may not ensure safe and automatic blocking mechanisms.
Innovation Solution
A gas discharge apparatus for liquefied hydrogen storage tanks featuring a receptacle with a stationary valve and a multistage opening and closing device that uses a sliding valve and spring mechanism to sequentially open valves, allowing for adjustable positioning and reduced ejection energy, enabling safe operation and automatic blocking without requiring great force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional gas discharge apparatus is used, then hydrogen gas can be discharged from the storage tank, but great force is required to open the valve and blocking is not automatic
Solution Approach 1:
The valve system is divided into two separate valves: a stationary valve and a sliding valve. The stationary valve remains fixed while the sliding valve moves to open and close the flow path. This segmentation allows the sliding valve to be easily operated with minimal force while the stationary valve provides reliable automatic blocking through its fixed position and spring mechanism.
Solution Approach 2:
The spring mechanism is configured to automatically push the sliding valve to the closed position when the external force is removed. This self-service mechanism ensures automatic blocking without requiring additional operational input from the user, thereby improving reliability while maintaining ease of operation.
2Speed
If a single-stage valve opening mechanism is used, then the valve can be opened quickly, but the maximum ejection energy of gas is high causing safety risks
Solution Approach 1:
The valve opening process is divided into two sequential stages: first the stationary valve opens, then the sliding valve opens. This periodic action allows the gas flow to be controlled in steps, reducing the maximum ejection energy while maintaining adequate opening speed for safety purposes.
Solution Approach 2:
The single valve opening action is segmented into two separate valve operations. The stationary valve opens first to allow initial gas release, followed by the sliding valve opening to complete the discharge. This segmentation reduces the peak energy ejection compared to a single rapid-opening valve.
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 apparatus effectively discharges gas while minimizing the maximum energy of ejection, ensuring safe operation and automatic blocking, thus enhancing safety and convenience by reducing the need for excessive force and ensuring secure closure.
Implementation Method 1
a spring configured to elastically support the forward-rearward movement cylinder against the valve case such that the opening and closing hole is blocked by the blocking disc
Data Source
AI summary
Disclosed is a gas discharge apparatus for liquefied hydrogen storage tanks, the gas discharge apparatus including a receptacle mounted to a liquefied hydrogen storage tank, the receptacle having a stationary valve configured to be opened by external force mounted therein, a multistage opening and closing device coupled to the receptacle such that the position of the multistage opening and closing device is adjustable, the multistage opening and closing device being configured to be opened by reaction force transmitted from the receptacle when moved relative to the receptacle, the multistage opening and closing device having a sliding valve configured to push open the stationary valve in the state in which the multistage opening and closing device is open, and a manipulation unit configured to move the multistage opening and closing device relative to the receptacle such that the sliding valve and the stationary valve are sequentially opened.