Composite explosion suppression body based on foam metal filled with ultrafine powder explosion suppressant

Abstract

The invention discloses a composite explosion suppression body based on foam metal filled with an ultrafine powder explosion suppressant. The composite explosion suppression body is formed by bondingan overpressure buffer layer with an explosion blocking layer. Dense rigid microstructure layout is adopted on the surface of the overpressure buffer layer. The explosion blocking layer is formed by filling ultrafine powder into iron-nickel foam metal. The rigid microstructure can resist explosion overpressure, and the direction and magnitude of explosive shock waves can be decomposed in a multi-angle mode so as to achieve the purpose of buffering. When pressure is borne continuously, the porous structure of the iron-nickel foam metal and NaHCO3 / rock powder ultrafine powder can fully absorb explosion negative pressure, and spreading of explosion flames can be effectively restrained. According to the composite explosion suppression body, the explosion overpressure with a huge overpressure amplitude value can absorb the explosion negative pressure with the momentum serving as a carrier in explosion resistance, and the high-temperature flames can be effectively obstructed and cooled. Compared with an existing explosion suppression body, the composite explosion suppression body is more portable and better in explosion suppression effect, the borne explosion pressure intensity can be reduced by 73.9%, and the flame spreading speed is decreased by 77.5%.

Description

technical field [0001] The invention belongs to the protection field of explosion-proof and flame-retardant, in particular to a composite explosion-suppressing body based on foamed metal filled with an ultrafine powder explosion-suppressing agent. Background technique [0002] From the perspective of explosion dynamics, at the moment of the explosion, high-temperature and high-pressure gas is generated in the core area and rapidly expands around, forming a huge explosion shock wave in the space. Explosion pressure varies with location and time. Holding position constant, by changing pressure as a function of time (see figure 1 ), it can be seen that after a certain period of time after the explosion, the explosion pressure reaches the peak overpressure, and the explosion wave is reflected in the form of explosion overpressure. The explosion pressure decays rapidly with time, and at t 0 It will always drop to the negative pressure relative to the atmospheric pressure until...

AI Technical Summary

Problems solved by technology

[0003] The design basis of existing explosion-proof structures is mostly to resist explosion overpressure or absorb explosion negative pressure. The design concept is one-sided, and the overall trend of explosion pressure changing with time is not considered comprehensively.

Moreover, the existing explosion-proof structures are mostly made of metal materials or non-metal materials with solid plates and block structures. The explosion-proof and flame-retardant effects are general, the shape is thick and dense, and it is inconvenient for emergency use.

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