APPARATUS FOR PULSE FEED OF SHIELD GAS OR LIQUID Russian patent published in 1995 - IPC

FIELD: welding production. SUBSTANCE: apparatus for pulse-type feeding of shield gas or liquid has a body with two inlet and one outlet ducts, a mixing chamber and a movable valve member with an actuating unit for moving that member. The mixing chamber is formed by a hollow cylindrical casing and by sleeves, in which adjusting screws-unions of the inlet ducts are mounted with possibility of axial motion. The valve member, mounted in the mixing chamber, has a cylindrical portion with a central annular turning and with longitudinal grooves at both sides of the turning, shifted by a predetermined angle, and two end cone portions. The adjusting screws are being arranged with fixation relative to the sleeves, providing a predetermined volume of feed of each gas. The shield gas or pressurized liquid is being fed through unions, axial openings of the screws, cavities of the sleeves and the longitudinal grooves to the annular turning. By adjusting a position of each of the screws and by moving the valve member, a reliable control of mixture content and feed of batch quantity of components of that mixture is being provided. EFFECT: enhanced structure of the apparatus, providing increased accuracy of controlling of flow of shield gas or liquid. 1 cl, 3 dwg