Valve core with bolt-connected valve stem and drive piece

A valve core with bolt-connected valve stem and drive piece, comprising a valve shell, a valve stem, a drive piece, a dynamic valve plate, a static valve plate and a valve seat, wherein the valve shell is a hollow shell structure, the drive piece, the dynamic valve plate, and the static valve plate are sequentially configured inside the valve shell, the valve seat is connected to the valve shell, the static valve plate is connected to the valve seat, the dynamic valve plate and the static valve plate are respectively plates made of a ceramic material, the dynamic valve plate and the static valve plate are tightly overlapped, the dynamic valve plate is located between the drive piece and the static valve plate, the drive piece is configured with a first convex part and a second convex part along the axial direction, the side of the dynamic valve plate facing the drive piece is formed with two notches, the first convex part and the second convex part are respectively embedded into each of the notches, the drive piece is protruded with a hollow convex cap in the direction facing the dynamic valve plate, the valve stem goes through the axle center of the drive piece along the axial direction, one end of the valve stem extends into the convex cap, the other end of the valve stem extends out of the valve shell in the direction away from the valve seat, a first bolt hole goes through the valve stem along the radial direction, the convex cap is formed with two second bolt holes along the axial direction, the first bolt hole and the second bolt holes are sequentially configured along the axial direction and are communicated to each other, a bolt piece goes through the first bolt hole and each of the second bolt holes along the radial direction, so that the valve stem and the drive piece are bolt connected;

• a sealing piece is covered by the convex cap, and the sealing piece blocks the end of each second bolt hole away from the valve stem, so as to seal the bolt piece.