A pressure relief valve configured to vent a pressurized tank in the event of a fire, the pressure relief valve comprising: a body; a vent passage disposed through the body, the vent passage having a first end configured to be placed in fluid communication with an internal volume of a tank and a second end configured to be placed in fluid communication with the atmosphere, the vent passage at least partially enclosed by a vent passage wall; a plug moveably mounted in the vent passage, the plug comprising a seal end forming a seal with the vent passage wall and a control end spaced apart from the seal end; a latch comprising an elongate body extending from a first end to a second end, the first end of the latch being rotatable about an axle, the latch having a contact portion disposed thereon, wherein the contact portion comprises a first surface disposed transverse to a longitudinal axis of the latch, wherein the contact portion is configured to be in contact with the control end of the plug in a first configuration, the latch being rotatable such that the contact portion is out of contact with the control end of the plug in a second configuration to allow movement of the plug in the vent passage; and a shape memory alloy wire having a first length disposed in the body of the pressure relief valve and a second length disposed outside the body of the pressure relief valve, the shape memory alloy wire configured to shorten when exposed to a temperature above a threshold temperature; wherein upon being exposed to heat above a threshold, the second length of the shape memory alloy wire is shortened to allow the latch to be actuated from the first configuration to the second configuration to allow the plug to move in the vent passage to allow gas in the tank to flow through the pressure relief valve to the second end of the vent passage and out of the pressure relief valve to the atmosphere.
IMPROVED PRESSURE RELIEF DEVICE
VERBESSERTE DRUCKENTLASTUNGSVORRICHTUNG
DISPOSITIF DE DÉCOMPRESSION AMÉLIORÉ
2024-08-07
Patent
Electronic Resource
English
IPC: | F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F16K VALVES , Ventile |
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