Valve for preventing backflow and valve module
AssigneeKamtec Inc.
InventorsChang Ho Seo, Seung Yong Kim, Jung Suek Koo
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to an air supply valve having a backflow prevention function and a valve module, for preventing backflow of air or gas through an outlet. The air supply valve includes a housing that includes a motor mounted therein and in which a supply flow path and an outlet of air are formed, a driver including a gear part for transmitting driving force of the motor and a converter for converting rotation of the gear part to linear motion, and a valve module that is coupled to an end of the converter and is opened while being spaced apart from the outlet of the housing to be connected to the supply flow path or is closed while being in contact with the outlet.
Claims18
An air supply valve having a backflow prevention function, comprising:
- a housing that includes a motor mounted therein and in which a supply flow path and an outlet of air are formed;
- a driver including a gear part for transmitting driving force of the motor and a converter for converting rotation of the gear part to linear motion;
- and
- a valve module that is coupled to an end of the converter and is opened while being spaced apart from the outlet of the housing to be connected to the supply flow path or is closed while being in contact with the outlet,
- wherein the driver includes a stem that is connected to the valve module and moves in a straight line,
- wherein a support of the valve module is coupled and fixed to the stem, and
- wherein a shielding part of the valve module is provided to relatively move with respect to the support and the stem, is provided to be moved by a pressure of air applied to the valve module, closes the outlet by receiving a pressure of backflow air when backflow applied to the valve module is generated, is lowered according to a larger air pressure than elastic force of an elastic part, applied from an upper part of the shielding part, and is raised according to a pressure of backflow air applied from a lower part of the shielding part.
A valve module for selectively opening and closing the outlet according to linear motion of a stem of a valve in an outlet of a valve housing, comprising:
- a support provided at an end of the stem;
- a shielding part provided to relatively move with respect to the support and the stem, provided to be moved by a pressure of air applied to the valve module, and closing the outlet by receiving a pressure of backflow air when backflow applied to the valve module is generated;
- and
- an elastic part provided between the shielding part and the support,
- wherein the shielding part is lowered according to a larger air pressure than elastic force of the elastic part, applied from an upper part of the shielding part, and is raised according to a pressure of backflow air applied from a lower part of the shielding part,
- wherein the shielding part includes an outer shielding part that selectively comes in contact with an edge of the outlet and performs a sealing function,
- wherein the stem passes through a center of the outer shielding part,
- wherein a stem sealing member that is in contact with an outer circumference of the stem and performs the sealing function is provided on the outer shielding part,
- wherein the shielding part further includes an inner shielding part disposed inside the outer shielding part,
- wherein the inner shielding part includes an inner flange member including a guide hole formed therein, into which another end of the stem sealing member is inserted, and a cylindrical member bent from an corner of the inner flange member.
Dependencies are inferred from the claim text.