| 摘要 |
A ventilation-discharge flame-arresting device comprises a metal cylindrical body. To ensure reducing concentration of explosive gases inside a box and reducing the pressure of a mixture without transfer of the flame from outside in the upper part of the body holes are made for ventilation, and inside the body at least three circular parts are tight fitted on each other: a part with slotted grooves and a central hole, a part with holes cutting flame and so on in succession, which serve to form a slotted labyrinth with enlarged gap. |
