Air cannon with quick closure function and use method of air cannon

Abstract

The invention discloses an air cannon with a quick closure function and a use method of the air cannon. The air cannon comprises a quick closure air chamber, an auxiliary air chamber, a high-pressure membrane, a membrane rupture device, an adjustable screw rod and a piston mechanism, wherein the piston mechanism is formed by connecting a piston, a piston rod and a sealing plug; the interior of the auxiliary air chamber is divided into an auxiliary air chamber exhaust cavity and an auxiliary air chamber damping cavity by the piston; the quick closure air chamber is provided with a quick closure air chamber valve; the auxiliary air chamber exhaust cavity is provided with an exhaust cavity air valve; the auxiliary air chamber damping cavity is provided with a damping cavity air valve; a high-pressure air chamber is provided with a high-pressure air chamber valve; and the corresponding valves are opened or closed and the auxiliary air chamber exhaust cavity, the high-pressure air chamber and the quick closure air chamber are inflated in real time to control firing. According to the air cannon, a passage between the high pressure air chamber and a launching tube can be quickly closed after triggering; the action time of shock wave positive pressure loaded on a test article can be shortened; and the action time of the shock wave positive pressure can be adjusted within a certain scope by adjusting the parameter of a quick closure device.

Description

technical field [0001] The invention belongs to the technical field of shock wave simulation loading test, and in particular relates to an air cannon with a quick closing function and a using method thereof. Background technique [0002] In the field of national defense and industrial production, it is often necessary to carry out shock wave simulation loading tests on test objects, such as shock resistance tests of explosion-proof buildings and structures, shock wave load tests of protective devices, etc. General blast shock wave loading methods include direct field chemical explosion and blast wave simulation device loading. [0003] The field chemical explosion test needs to use high-energy explosives, which has high safety requirements for the test site, participating units and personnel, and the test repeatability is poor. In recent years, more and more scientific research institutes and universities have begun to use blast wave simulators to realize shock wave loading...

AI Technical Summary

Problems solved by technology

[0007] Nevertheless, there is still a significant problem in the application of the technology of using the first-stage air cannon structure for blast wave simulation: the blast wave simulation device based on air cannon technology can realize the shock wave overpressure peak P controllable; but once the structure of the device is finalized, the positive pressure action time t of the shock wave in the test is uncontrollable, such as figure 1 Shown is the waveform of the shock wave acting on the test piece

However, the positive pressure generated by conventional explosives is generally on the order of tens of milliseconds, which makes it difficult for the blast wave simulator based on the first-stage air cannon structure to simulate the shock wave generated by the explosion of conventional explosives.

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