Pressure balance type plug valve

The pressure balance type plug valve comprises a valve body, a plug valve element and a valve rod, an end cover is installed at an opening in the bottom of the valve body, an inner cavity is formed in the valve body, the plug valve element and the inner cavity are each in a big-end-down conical shape, the plug valve element is arranged in the inner cavity, and the valve rod is arranged in the valve body. The inner cavity is divided into an upper cavity and a lower cavity, and the plug valve element is provided with a flow channel communicating with the upper cavity and the lower cavity. One end of the valve rod is connected with the plug valve core; a first buffering mechanism and a second buffering mechanism are arranged at the top and the bottom of the plug valve element correspondingly, through the arrangement, the stability of the position of the plug valve element is improved to a great extent, and the locking problem caused by pressure difference is avoided. 本实用新型公开了一种压力平衡式旋塞阀，包括:阀体、旋塞阀芯和阀杆，所述阀体的底部开口处安装