| 摘要 |
The outlet has a socket-type housing (2), to the upstream end which liq. concrete is fed. At its downstream end is a tube (3) fixed in the housing between a ring-shaped compressed air feed chamber (7) on the inside of the housing and a casing (4) accommodated inside the housing (2). On the outside of the casing (4) is an air distribution chamber (12) connected to the feed chamber (7) via inclined apertures (11) directed through the mouthpiece walls (3). The compressed air introduced into the feed chamber (7) flows via the apertures (11) and the distribution chamber (12) axially outwards into the feed tube via axial holes (13) in the outlet end of the distribution chamber. Compressed air is also fed axially into the mouthpiece tube in the form of jets along the inside of the tube. |
