Heat Activated Pressure Relief Valves and Pressure Vessels

Abstract

The invention discloses a heat-activated pressure relief valve and a pressure vessel. The heat-activated pressure relief valve includes a valve body, a bearing part, a temperature sensing unit, and a first valve core. The valve body has a high-pressure side communication port and a low-pressure side communication port. A fluid channel is connected between the side communication port and the low-pressure side communication port, the first valve core is located in the fluid channel, and the temperature sensing unit is suitable for restricting the carrier part in the locked position in the radially outer side of the valve body relative to the carrier part. The bearing part in the locked position is used to make the first valve core block the fluid passage, and the temperature sensing unit is suitable for being deformed by heat to remove the restricting force on the bearing part, so that the fluid at the high-pressure side communication port pushes the first valve core to move , and connect the high-pressure side communication port with the low-pressure side communication port. According to the heat-activated pressure relief valve of the present invention, the bearing member can replace the temperature sensing unit to receive the gas pressure from the high-pressure container or pipeline in the axial direction of the heat-activated pressure relief valve, and the work reliability of the heat-activated pressure relief valve is higher.

Description

technical field [0001] The invention relates to the field of valve bodies, in particular to a thermally activated pressure relief valve and a pressure vessel. Background technique [0002] In related technologies, with the development of new energy vehicles, hydrogen-oxygen fuel cells are more and more widely used in new energy vehicles due to their high energy conversion efficiency and environmental friendliness. In a vehicle equipped with a hydrogen-oxygen fuel cell, a high-pressure hydrogen cylinder is generally preset in the vehicle, and the hydrogen in the high-pressure hydrogen cylinder and the oxygen in the air are electrochemically reacted in the hydrogen-oxygen fuel cell to generate electric energy to realize hydrogen-oxygen The fuel cell powers the vehicle. [0003] Since the hydrogen in the high-pressure hydrogen cylinder is easily ignited at high temperature and explodes, a heat-activated pressure relief valve is provided on the high-pressure hydrogen cylinder o...

AI Technical Summary

Problems solved by technology

At the same time, since the temperature-sensing unit needs to be deformed when the temperature rises, the strength of the temperature-sensing unit is generally low, and the temperature-sensing unit is easily damaged when it is subjected to high pressure, causing hydrogen to escape from the heat-activated pressure relief valve during normal operation of the vehicle , use poor reliability

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