Automatic gun selecting and placing rack for hydrogenation machine

The utility model relates to the technical field of hydrogenation machines, and provides an automatic gun selecting and placing rack for a hydrogenation machine, which comprises a gun stock, a top plate, a back plate, a limiting component, a plugging block and a travel switch, a gun stock and a top plate for fixing a hydrogenation gun are arranged on the back plate; a limiting assembly is movably arranged on the top plate in a penetrating mode and connected with a plugging block. The plugging block corresponds to the gun stock in position and is matched with the hydrogenation gun for positioning under the action of the limiting assembly. And the travel switch is also arranged on the back plate and is used for sending an induction signal when the hydrogenation gun is taken and placed. The hydrogenation gun can be reliably positioned, the integral structure is simple, the hydrogenation gun is convenient to take and place, the placing reliability of the hydrogenation gun can be guaranteed, and the gun rack and t