Gate valve with threaded valve cover

The utility model discloses a gate valve with a threaded valve cover, which belongs to the field of gate valves and comprises a valve body, a support is arranged at one end of the valve body, a graphite gasket is glued at the end of one side, close to the support, of the valve body, a valve rod is slidably connected in the support, the bottom end of the valve rod is connected with a valve plate, and the valve plate is positioned in the valve body. A valve seat is arranged on the outer portion, close to the valve plate, of the valve body, valve rod padding is arranged in the support, a padding shaft sleeve is arranged at the top end of the valve rod padding, the valve rod is sleeved with the padding shaft sleeve, a hand wheel is fixed to the top end of the valve rod, and the position, connected with the valve body, of the support is sleeved with a valve cover. A positioning block is fixed to the side, corresponding to the positioning groove, of the valve deck, so that when the gate valve with the threaded valv