One-way finish valve suitable for hydrogen-energy handheld torch

1 . A one-way cylinder opening valve suitable for a hydrogen energy handheld torch, comprising:

a valve body;

a valve core assembly;

a spring;

a spring chamber; and

a sealing ring;

wherein the spring chamber is connected to the valve body, the valve core assembly and the spring are arranged in the spring chamber, a valve body sealing lip is arranged on the valve body, and the valve body sealing lip and the valve core assembly are sealed by means of a principle of compressing a non-metallic material to reach a sealing specific pressure of the non-metallic material, and the spring provides a sealing force for the valve core assembly; the sealing ring is arranged on an outer side of the valve body, so as to ensure sealing between the valve body and a gas cylinder; a through hole is provided in the spring chamber and used as a hydrogen inlet, and a hydrogen intake hole and a central flow channel of a valve core are provided in the valve core assembly; an external force needed to open the one-way cylinder opening valve is greater than the sealing force provided by the spring for the valve core assembly and an upward medium force applied to the valve core assembly in an under-pressure state, hydrogen enters a central through hole in the valve body through the hydrogen inlet, the spring chamber, the hydrogen intake hole and the central flow channel of the valve core, and flows out via the central through hole, so as to realize hydrogen discharging;

wherein the valve core assembly comprises the valve core and a structural member of the non-metallic material;

wherein the valve core comprises a central valve core, a bottom cylinder and a large-diameter structure between the central valve core and the bottom cylinder for installing the structural member of the non-metallic material; the central valve core is axially provided with the central flow channel of the valve core, and a side wall of the central flow channel is provided with the hydrogen intake hole; the bottom cylinder is configured to install one end of the spring, an installation position of the structural member of the non-metallic material corresponds to a position of the valve body sealing lip, and a direction of a resultant force of the sealing force and the medium force applied to the valve core assembly is at a wide angle to the deformation direction of the non-metallic material, and wherein the one-way cylinder opening valve is used for hydrogen working conditions below 70 MPa G; and

wherein the structural member of the non-metallic material is a stepped annular member, and other surfaces except stepped surfaces of the structural member are wrapped and installed by the large-diameter structure on the valve core assembly, the stepped surfaces wrap an outer edge of the valve body sealing lip with an enveloping angle of 90° to ensure sealing in both radial and axial directions, and the valve body sealing lip and the valve core assembly are provided with metal stops to prevent the valve body sealing lip from crushing the structural member of the non-metallic material in an axial position under a high pressure working condition.

2 . The one-way cylinder opening valve of claim 1 , wherein the valve body sealing lip is a cylindrical structure arranged at one end of the central through hole in the valve body, and after the central valve core is inserted into the central through hole, a gap is left between an outer wall of the central valve core and an inner wall of the cylindrical structure.

3 . The one-way cylinder opening valve of claim 1 , wherein internal threads of the valve body are configured to connect the valve body to the spring chamber.

4 . The one-way cylinder opening valve of claim 1 , wherein external threads of the valve body are configured to connect the one-way cylinder opening valve to the gas cylinder.