The invention discloses a combined type air inlet and outlet valve, which relates to the technical field of air inlet and outlet valves, and comprises a valve body and a valve cover arranged at the upper part of the valve body, a floating ball is arranged in a floating ball cover, a sealing ring is arranged at the lower part of an air outlet, a clamping
assembly connected with the floating ball cover is arranged outside the floating ball, and a box body with an open upper part is arranged below the floating ball cover. A one-way valve is arranged on the lower portion of the box body, a floating block is arranged in the box body, a fixing
assembly used for fixing the clamping
assembly is arranged on the floating block, a buffering anti-collision assembly is arranged on the fixing assembly, and a guiding anti-rotation assembly is arranged outside the floating ball. The air inlet and
exhaust valve can prevent the floating ball from closing and sealing the exhaust port in the
mass exhaust process, influence on
mass exhaust work is avoided, influence on the closing function of the exhaust port due to normal floating of the floating ball under the action of
water flow in the follow-up process is avoided, meanwhile,
speed reduction can be achieved through triple buffering, and the service life of the exhaust port is prolonged. And
impact damage to the floating ball and other related parts when the floating ball descends can be avoided.