Novel structure of valve rod of intermittent valve of coating machine

The utility model discloses a novel structure of a valve rod of an intermittent valve of a coating machine, which comprises a valve rod of a stepped shaft-shaped structure, the diameter of the middle of the valve rod is larger than that of the two ends of the valve rod, a pin hole is arranged at the bottom of the valve rod, a first bonnet and a second bonnet are arranged on the upper portion of the valve rod and are oppositely arranged, and the first bonnet and the second bonnet are sleeved on the upper portion of the valve rod. Threads are arranged at the top end of the valve rod, a nut matched with the threads is arranged on the valve rod, and the nut is located above the first valve bonnet and the second valve bonnet. According to the utility model, a fixed valve bonnet is changed into the movable valve bonnet, so that the instantaneous pressure when the intermittent valve of the coating machine is opened is relieved, the thickness of the head of a coating pole piece is adjusted, the valve bonnet is conven