| 摘要 |
A foam injection system (301, 701) for use in the manufacture of cementitious products includes a foam injection body (305, 605) and first and second port inserts (100, 400; 200, 500). The foam injection body (305, 605) defines a slurry passageway (310, 610) and a port passageway (315, 615) having a port opening (317, 617) in fluid communication with the slurry passageway (310, 610). The first and second port inserts (100, 400; 200, 500) respectively define first and second foam passageways (115, 415; 215, 515) having first and second orifice sizes (1, 4; 3, 4, 5) which are different. The first and second port inserts (100, 400; 200, 500) are adapted to removably mount to the foam injection body (305, 605) such that the respective foam passageway (115, 415; 215, 515) is in fluid communication with the slurry passageway (310, 610) via the port opening (317, 617) of the port passageway (315, 615). One port insert (100, 400) can be replaced with another (200, 500) to readily vary the pressure of the foam passing through the particular port insert (100, 400; 200, 500) and injected into a cementitious slurry traveling through the slurry passageway (310, 610). |
