Operation method for leak detection device used for electric power condenser ellipse heat exchange tube

The invention discloses an operation method for a leak detection device used for an electric power condenser ellipse heat exchange tube. Four elevation air cylinders lift a support frame; an ellipse heat exchange tube is arranged on a positioning block of a bottom plate and on a positioning block of a tail plate inside the support frame; a piston rod of a main control air cylinder is extended and enables a sliding plate to move forward along a guiding groove through a connection mechanism; a front sealing seat and a tail sealing seat tightly prop the ellipse heat exchange tube between the front sealing seat and a tail sealing seat; the elevation air cylinders are controlled and thus the support frame is enabled to be descended below a liquid surface; air is charged into an air case; when air pressure inside the ellipse heat exchange tube achieves a set air pressure standard, detection is performed to determine whether air leakage happens; the elevation air cylinders elevates the support frame again and all pa