SPIRAL PIPE BRANCH FOR FANS, PARTICULARLY FOR JACKETS OF EXHAUST FANS Russian patent published in 2012 - IPC F04D29/40 

FIELD: machine building.

SUBSTANCE: spiral pipe branch is designed to form a fan propeller jacket containing a pair of housing halves (4, 5), made capable of connecting with each other along the connection plane (p), with each half of housing (4, 5) comprising relevant part (4a, 5 a) of injection pipe branch nozzle (6), and together these parts (4a, 5a) of the nozzle form cross-section (3) of the injection pipe branch. Halves of pipe branch housing (4, 5) are pivotally interconnected along axis (Z) of the hinge joint and rotatable between the first operating position where halves of housing (4, 5) are joined along the plane of connection (P), and parts (4a, 5a) of nozzle set borders of total cross-section (3) of injection, and the second operating position where parts (4a, 5a) of nozzle move towards each other with a consequent reduction in the size of the cross-section (3) of injection.

EFFECT: invention enables to connect and disconnect pipe branch and the construction of a case easily and quickly on which the pipe branch is attached, and to gain access to the engine easier and faster which simplifies assembling and dismantling.

13 cl, 7 dwg