Patent ID: 10870118

Abstract:
[Problem] To provide a nozzle cap that hardly causes clogging in the nozzle hole even when used for a long time, a nozzle device having such a nozzle cap and a spraying method of a chemical solution.[Solution] The present invention relates to a nozzle cap 100 to be used for a nozzle device for spraying a chemical solution to wet paper, wire, felt, press rollers, dryer rollers, canvas or guide rollers in a paper machine, which is provided with: an air cap part 10 that is provided with a first base part 11 having a cylinder shape with a lid, with a nozzle hole 13 formed on the first base part 11; and a liquid cap part 20 that is provided with a second base part 21 having a disc-shape and a protruding part 22 that is formed on the second base part 21, and in this structure, a plurality of chemical solution spraying air holes 22b are formed on the second base part 21, and into a space part S formed between the first base part 11 and the second base part 21, with the first base part 11 and the second base part 21 being fitted to each other, a chemical solution is flowed from the protruding part 22, and air is also flowed in from the chemical solution spraying air holes 22b so that the chemical solution from the nozzle holes 13 is sprayed by the air, and the lid part 11a has a lower surface having a plane shape so that the air flowed in from the chemical solution spraying air holes 22b are made to collide with the lower surface of the lid part 11a through the space part S.