| 摘要 |
A louvre-type airflow regulator ( 10 ) for a mine passage comprises a plurality of louvre blades ( 12, 14, 16 ). Each blade is adapted for mounting in a frame ( 20 ). Each blade can pivot in the frame around a lengthwise axis between a predetermined position in which the louvre blades combine to close or restrict at least a portion of the passage, and an open position in which air is able to readily flow between the louvre blades and through the passage. A biasing mechanism is provided for acting on each louvre blade such that, in use, each louvre blade can be maintained in the predetermined position until a predetermined airflow against the louvre blades is reached. |
