Development of Overflow-Prevention Valve with Trigger Mechanism.

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Ishino, Yuji^1 ; Mizuno, Takeshi^1 ; Takasaki, Masaya^1

Shimo-okubo 255, Saitama, Japan^1

关键词: Electric components;    Fluid level;    Loading arms;    Locking mechanism;    Mechanical parts;    Sensor probes;    Threshold-value;    Trigger mechanism;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012096/pdf
DOI  :  10.1088/1742-6596/744/1/012096

来源: IOP

【 摘 要 】

A new overflow-prevention valve for combustible fluid is developed which uses a trigger mechanism. Loading arms for combustible fluid are used for transferring oil from a tanker to tanks and vice versa. The loading arm has a valve for preventing overflow. Overflow- prevention valves cannot use any electric component to avoid combustion. Therefore, the valve must be constructed only by mechanical parts. The conventional overflow-prevention valve uses fluid and pneumatic forces. It consists of a sensor probe, a cylinder, a main valve for shutting off the fluid and a locking mechanism for holding an open state of the main valve. The proposed overflow-prevention valve uses the pressure due to the height difference between the fluid level of the tank and the sensor probe. However, the force of the cylinder produced by the pressure is too small to release the locking mechanism. Therefore, a trigger mechanism is introduced between the cylinder and the locking mechanism. The trigger mechanism produces sufficient force to release the locking mechanism and close the main valve when the height of fluid exceeds a threshold value. A trigger mechanism is designed and fabricated. The operation necessary for closing the main valve is conformed experimentally.