Spray head replacement limiting device for selective wave soldering

The selective wave soldering nozzle replacement limiting device comprises a bottom plate and a telescopic rod, a sliding groove is formed in the right side of the interior of the bottom plate, a sliding plate is movably connected to the interior of the sliding groove, a supporting block is fixedly connected to the upper portion of the sliding plate, and a fixing plate is fixedly connected to the upper portion of the supporting block; and a groove is formed in the fixing plate, a movable block is movably connected to the interior of the groove, and an insertion block is fixedly connected to the upper end of the telescopic rod. According to the selective wave-soldering spray head replacement limiting device, multiple detachable structures in the selective wave-soldering spray head replacement limiting device facilitate a user to quickly mount and dismount a spray head, the left end of the spray head is fixedly connected with an auxiliary gear, during mounting, the auxiliary gear completes mounting and fixing of