| 摘要 |
PROBLEM TO BE SOLVED: To increase flame offset efficiency in a trap device for preventing the jetting of flame flowing out to the outside of a crank case of a large internal combustion engine. SOLUTION: This flame jetting preventive trap device includes a primary flame lead-out duct 10 arranged on the outer periphery of an opening of the crank case, having a structure of superposing a large number of straps of arranging a projection and a recess in a radial shape on a plate surface, absorbing the flame via a lead-out hole arranged between the straps and discharging the flame in an upsparked state in an unburning state caused by the lack of oxygen, a pressure-reduced diffusion space 20 for reducing the pressure of the flame dispersed and weakened while passing through the primary flame lead-out duct, and a secondary flame lead-out duct 30 arranged outside the pressure-reduced diffusion space and finally absorbing residual flame by arranging a large number of lead-out holes 10b for forming a flame moving passage to the inside and to the outside, and has at least one of a flame heat absorbing net having a net structure superposed by crossing a large number of metallic wire rods, arranged in the pressure-reduced diffusion space 20 and absorbing and dispersing the flame flowing out to the pressure-reduced diffusion space 20 side. COPYRIGHT: (C)2009,JPO&INPIT
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