| 摘要 |
FIELD: mining industry; methods and devices for localization of explosion of methane-and-air mixture and coal duct. ^ SUBSTANCE: proposed device includes bin filled with flame suppressing powder and provided with filling neck which is closed with cover and easily breakable diaphragm at its outlet. Device has pneumatic cartridge coaxially located in perforated intermediate chamber which is coaxially located in its turn in bin; it is cone-shaped or cylindrical in form. One end of intermediate chamber is rigidly secured on inner end wall bin and other end is rigidly secured at bin outlet in spryer made in form of swirler. Pneumatic cartridge has several working chambers connected with exhaust holes, actuating mechanism with spherical movable supports engageable with spring-loaded stepped piston which is located in main working chamber closing its holes; subsequent exhaust holes of working chambers are closed by spring-loaded slide valves having bypass passages of equal section which are located in working chambers dividing them; cartridge has front chamber between its housing and sliding sleeve containing gas-forming chemical agent. According to another version, device has two base modules which are connected by mirror image; each module has pneumatic cartridge and perforated intermediate chamber. ^ EFFECT: enhanced efficiency. ^ 20 cl, 15 dwg |
