Gas shock-wave generating device

Abstract

The invention discloses a kind of gas blast generating device, it includes holistic valve group, seal cavity, seal energy storing cavity, blast tube, and middle separating board. The valves have unequal seal cross-section area, one valve moving in the seal cavity, the middle separating board separates the seal cavity and the seal energy storing cavity, one of the valves can move along the blast tube, the blast tube is at one end of the seal energy storing cavity and connects with the cavity.

Description

Technical field: [0001] The invention relates to a gas shock wave generating device, in particular to a gas shock wave generating device suitable for a boiler soot blower, a gas dynamic shock wave tube and a large-energy air cannon. Background technique: [0002] In the existing technology, the methods for artificially generating plane shock waves in the tube include: the detonation combustion method, in which the combustible gas and the combustion-supporting gas are mixed and detonated to burn through the impact tube; The diaphragm is used to break the membrane instantly and the high-pressure gas is suddenly contacted with the low-pressure gas, and then it is generated in the low-pressure gas section tube along the blasting impact direction; the piston method, the piston in the tube suddenly accelerates forward and is generated in the tube in front of the piston movement direction. Among the three methods, the detonation combustion method has been practically applied in som...

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Problems solved by technology

Among the three methods, the detonation combustion method has been practically applied in some fields, such as the soot blowing on the low-temperature heating surface of the boiler, and the gas cannon specially used for bombing birds in the airport to ensure the safety of aircraft take-off and landing. Since it uses combustible gas, There are safety problems in the use and maintenance of equipment. For example, although the effect of soot blowing on the heating surface of the boiler is obvious, it can only be used for soot blowing on the heating surface at the tail of the boiler where the flue gas temperature is low, and it is difficult to apply in the high temperature section.

The membrane rupture method is limited to shock tube experiments in aerodynamic research because the membrane rupture membrane is a one-time use product, and there are problems that it is not easy to accurately control the membrane rupture pressure and the operation is cumbersome.

The piston rule is difficult to generate shock waves of usable intensity and is limited to the laboratory

[0003] The key of the membrane rupture method is that the membrane separating the high and low pressure gas is burst open instantaneously under the action of the high pressure gas, and the time is very short. The fast valve device used in the gas cannon that has been applied now, such as the plunger type, Diaphragm fast valve, it is also difficult to achieve the door opening effect close to the rupture speed, and generate a shock wave of usable intensity

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