Ball valve

The invention relates to a ball valve which comprises a valve body and a valve ball. A mounting cavity is formed in the upper end of the valve body, a connecting sleeve is arranged in the mounting cavity, a connecting cavity is formed in the middle of the connecting sleeve, a valve rod is rotationally arranged in the connecting cavity, and the valve rod divides the connecting cavity into a first sealing cavity and a second sealing cavity which are not communicated with each other. When the valve rod is broken, the first sealing cavity communicates with the second sealing cavity, then a clamping block on the connecting sleeve is separated from the valve body, and therefore the connecting sleeve and the valve rod can be taken down. The ball valve has the advantages that the broken valve rod is automatically ejected out of the valve body through the pressure in the ball valve, so that the valve rod is replaced more quickly and conveniently when broken, and the maintenance time is saved. 本发明涉及一种球阀，包括阀体、阀球，所述阀体上端开