Novel linkage all-welded ball valve

A transverse flow channel is formed in a valve body, the valve body comprises a left valve block and a right valve block, connecting blocks are arranged at the upper position and the lower position between the left valve block and the right valve block, the two connecting blocks, the left valve block and the right valve block are fixed together in a welded mode, and a valve element for opening and closing the transverse flow channel is arranged in the valve body. The left side and the right side of the valve element are respectively provided with a valve seat inserted into the valve body, sealing rings matched with the spherical surface of the valve element are fixed to the two valve seats, compression springs driving the two valve seats to press the spherical surface of the valve element are installed at the side ends of the two valve seats, a valve rod driving the valve element to rotate is installed on the valve body, and a driving device driving the valve rod to rotate is installed at the top end of the v