Safety self-locking structure of high-pressure hydrogen refueling gun

Abstract

The invention discloses a safety self-locking structure of a high-pressure hydrogen refueling gun. One radial installing hole is at least formed in a gun core shell of the high-pressure hydrogen refueling gun in the periphery direction. All the radial installing holes communicate with a gas refueling channel in the hydrogen refueling gun through a gas input channel. A self-locking sealing assemblyis arranged in each radial installing hole. Each self-locking sealing assembly can move along the corresponding radial installing hole to make contact with the inner wall of a gun head shell and canmake contact with the corresponding radial installing hole for sealing. Each self-locking sealing assembly comprises a sealing pin arranged in the corresponding radial installing hole, and a circle ofannular positioning groove is formed in the outer wall of each sealing pin. An O-shaped sealing ring and an open washer are sequentially nested in each annular positioning groove in the axial direction of the corresponding sealing pin, and each O-shaped sealing ring is located on the side close to the axis of the gun core shell. The structure has the advantage of improving use safety of the hydrogen refueling gun in the working state.

Description

technical field [0001] The invention relates to the technical field of high-pressure hydrogenation guns, in particular to a safety self-locking structure of high-pressure hydrogenation guns. Background technique [0002] With the increasing consumption of fossil energy such as oil, natural gas, and coal, its reserves are gradually decreasing, and will be exhausted one day. The development of clean energy to replace fossil energy has become one of the topics that countries around the world are rushing to research and develop. Clean and pollution-free fuels The research and development of batteries is imperative. A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, using fuel and oxygen as raw materials. If hydrogen is used as fuel, its combustion product is only water, which has no pollution to the environment and can be recycled, making it an ideal secondary energy source. Hydrogen is abundant in the entire earth's env...

AI Technical Summary

Problems solved by technology

[0004] When in use, when the head of the hydrogenation gun is correctly connected to the hydrogenation port on the fuel cell vehicle, push the handle on the gun body assembly, and the push ring is subjected to a force along the axis of the head of the hydrogenation gun through the principle of leverage , under the push of this force, the push ring, the pressure ring, the gun head shell, and the gun head sleeve will overcome the elastic force of the second spring and move forward relative to the gun core shell. , the annular step in the inner cavity of the gun head sleeve will act on a section of the inclined surface of the claws, so that the claws will be folded inward and closed to grasp the hydrogenation port. At the same time, the thimble of the valve core will be pushed backward by the hydrogenation port Overcome the elastic force of the first spring and move backward, so that the thimble of the valve core is separated from the valve seat sleeve and the gas filling channel is opened. At this time, the hydrogenation gun feeds back a signal to the hydrogenation machine to connect the hydrogenation port correctly, which is controlled by the hydrogenation machine Start to feed high-pressure gas into the hydrogenation port through the gas injection channel of the hydrogenation gun; during the process of filling the hydrogenation port with high-pressure hydrogen through the gas injection channel of the hydrogenation gun, the second spring is always in the In the compressed state, its tendency to elongate makes the gun head shell and the gun core shell have a tendency to move relative to each other. For example, in the high-pressure state of filling gas, when the gun head shell moves backward relative to the gun core shell, it will cause The claw loosens the hydrogenation port, causing the hydrogenation machine to separate from the hydrogenation port, resulting in serious safety accidents

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