| 摘要 |
FIELD: fire-fighting equipment, particularly control means thereof. ^ SUBSTANCE: shutoff and triggering device comprises body in which inlet 3 and outlet 4 orifices for fire-extinguishing composition passage created. Cup-shaped shutoff valve 1 is also provided. The shutoff valve 1 has vulcanized sealing member which presses the shutoff valve installed in its closing position to seal 9 formed inside the body, and shutoff unit. High-pressure cavity 13 is formed in body end at the inlet orifice. The high-pressure cavity is created between the shutoff valve and groove made in the body. Stimulating chamber 16 is created between opened end 10 of shutoff valve and lid 12 of the body. The triggering unit comprises triggering unit diaphragm 17 secured inside the body and closing channel 22, which communicates the stimulating chamber with atmosphere. The triggering unit also has piercer 21 with drive. The shutoff valve is provided with connection channel 15 having area less than that of piercer 21 and arranged so that when the drive is actuated the drive is located in high-pressure cavity and connects above cavity with stimulating cavity interior. After drive actuation the drive is located outside above high-pressure cavity, namely outside radial sealing means 29 formed in the body. ^ EFFECT: increased reliability, extended field of application and increased air-tightness thereof, as well as increased speed of fire-extinguishing composition discharge from the cylinder. ^ 6 cl, 2 dwg |
