| 摘要 |
According to the embodiment of the present invention, a piston of a pyrotechnic valve allows a fluid to flow into a second pipe through a first pipe by separating covers from the pipes. The first pipe is inserted into a guide hole to allow the fluid to flow into the guide hole. The second pipe discharges the fluid from the guide hole. The piston comprises a piston body with the top joined with a cartridge; a joint at the bottom of the piston body including a through-hole to connect the first and second pipes to each other while the covers are removed; and a plurality of protrusions on the outer circumference of the piston body adjacent to the joint to be fixed to the guide hole by being partially transformed by friction against the inner circumference of the guide hole while the covers are removed. The nearest protrusion to the joint is round in order to prevent the protrusions from flowing into the first and second pipes when being transformed and separated from the piston body. |
