Valve convenient to open and close

A valve convenient to open and close comprises a hand wheel, a valve rod, a valve body and a valve element, a valve cavity is formed in the valve body, the valve element is arranged in the valve cavity, one end of the valve rod is connected with the hand wheel, the other end of the valve rod extends into the valve cavity to be connected with the valve element, an impact groove is formed in the hand wheel, and an impact block is arranged at the top end of the valve rod. The impact block extends into the impact groove to be connected with the hand wheel, the groove wall of the impact groove protrudes to form a limiting part, one end of the impact block is in clearance fit with the limiting part, the impact block is arranged between the valve rod and the hand wheel, when the hand wheel rotates, the impact block impacts the hand wheel, and the instant torque is increased; the increase of the torque reduces the opening and closing difficulty of the valve and facilitates opening and closing of the valve. 一种便于启闭的阀门，