Jet diffuser device with quick-replaceable nozzle for irrigation systems

A jet diffuser with quick-change nozzle for use on irrigation plants (I) with substantially vertical drop pipes (R), which diffuser comprises an upper supply portion (2′) and a lower diffusing portion (2″), wherein said supply portion (2′) comprises:

• a main body (3) having an upper tubular portion (3′) with a longitudinal axis (L) connectable to a respective drop pipe (R) and a lower hollow portion (3″) with a side wall (3′″) and a central cavity (8);
• a lateral opening (9) formed in said side wall (3′″) of said lower hollow portion (3″);
• a substantially tubular nozzle (7) adapted to be radially inserted through said lateral opening (9) and placed in said central cavity (8) in substantially coaxial and facing relationship to said upper tubular portion (3′) to direct a liquid jet axially downward;
• a quick-connect system 10) associated with said nozzle (7) for fixing said nozzle within said main body (3);
• wherein said lower diffusing portion (2″) comprises a diffusing element (36) for diffusing an outflowing jet from said nozzle (7);
• and
• wherein said quick-connection system (10) comprises cam and follower drive elements (11) acting on said nozzle (7) to move and push said nozzle axially upward substantially into contact and in sealing relationship to a lower edge (15) of said upper tubular portion (3′).