The invention relates to a fire extinguishing technology, and discloses a
bottle valve for shock-proof
dry powder extinguishing devices. The
bottle valve comprises a lower valve body with a first step through hole, an upper valve body is arranged in the upper part of the lower valve body, and the upper part of the upper valve body is provided with an upper valve bonnet; the upper valve body is provided with a second step through hole which is coaxial with the first step through hole, a
puncturing needle penetrates through the inside of the second step through hole, the upper part of the
puncturing needle is sleeved with a
piston, the lower hole of the second step through hole is in clearance fit with the
puncturing needle, and the upper hole of the second step through hole is in slide fit with the
piston; the bottom of the upper hole of the first step through hole is provided with a diaphragm, the diaphragm is provided with a pressing ring, the pressing ring is provided with a shock-proof
gasket, the bottom of the upper valve body props against the shock-proof
gasket, the shock-proof
gasket is provided with an inner tapered hole, the
diameter of the lower part of the puncturing needle is less than that of the upper part of the puncturing needle, and the transitional surface of the puncturing needle is matched with the inner tapered hole of the shock-proof gasket; and the upper valve bonnet is provided with a central hole, the central hole is in sliding fit with the puncturing needle, the upper valve bonnet, the upper valve body, the
piston and the puncturing needle are formed to an annular
closed cavity, and an explosive box is arranged in the annular
closed cavity.