| 摘要 |
An atomizer for liquid fuel burners and the spraying of protective liquids or lubricating liquids onto the surfaces of forging, foundry, or stamping/embossing equipment and like articles comprising a cylindrical body member providing respective generally axially directed liquid and gas conduits, the liquid conduit terminating at one end of the body in a restricted liquid discharge passage formed concentrically in a centered axially extending boss and the gas conduit opening at the one end of the body in the radially directed body end wall outwardly of the centered boss; a closure casing slidingly supported on the peripheral wall of the body member and including an end wall structure providing a radial wall opposing the radially directed body end wall to define a gas chamber and having a conical recess coaxially related to the centered boss and defining at its minor diameter end a through bore dimensioned to closely slidingly receive the centered boss to control the gas flow from the gas chamber around the centered boss and also providing in axially spaced relation opposing the end of the centered boss a needle valve disposed to enter the restricted fluid passage and control the liquid flow therefrom and integrally formed on the inner ends of intersecting radial arms defining sector shaped outlet passages; and resilient means operatively arranged between the body member and closure casing to normally bias the closure casing in a direction to ensure the closure of the restricted liquid discharge passage by the needle valve and the engagement of the periphery of the centered boss with the closure casing through bore to close off the gas flow. Provision for shifting the closure casing in the opposite direction comprises convergent angularly spaced restricted passages in the centered boss radially outwardly of the restricted liquid passage to provide permanently open by-pass gas flow passages connecting the gas chamber to the atmosphere to alternately effect a gradual build up of pressure to overcome the biasing force when pressurized gas is supplied and a gradual reduction of pressure in the gas chamber when the pressurized gas supply is interrupted. The preliminary flow of gas and the terminal flow of gas through the by-pass passages as the pressure in the gas chamber rises and falls clears the liquid from the discharge end of the restricted liquid discharge passage and the needle valve to eliminate the need of a liquid return line and to minimize clogging formations on the needle valve and in the end of the restricted liquid discharge passage. |
