Pneumatic needle membrane piercing device for rectangular-section shockwave tube

The invention provides a pneumatic needle membrane piercing device for a rectangular-section shockwave tube. The pneumatic needle membrane piercing device comprises a film clamping part and a needle piercing part, wherein the film clamping part comprises a film clamping pipe body, a film clamping pressing cover and a film clamping pressure-bearing plate and is used for connecting a high-pressure-section and low-pressure-section shockwave tube and tightly clamping a film; and the needle piercing part mainly comprises a push rod, a spring supporting cover, a spring supporting barrel, a guide seat and a piercing needle and can reach the needle piercing effect by controlling the retracting the piercing needle through high-pressure gas. The mechanism is pneumatically controlled through the high-pressure gas, the driving force is relatively great and the retracting speed of the piercing needle is rapider. The material and the length of the piercing needle can be changed according to the type of the film and films w