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Polyurethane/ liquid-based composite explosion-proof structure and preparation method thereof

An explosion-proof structure, polyurethane technology, applied in blasting and other directions, can solve the problems of secondary fragmentation damage, self-weight, poor mobility, etc., and achieve the effect of increasing energy absorption value, reducing transmission intensity, and prolonging transmission duration.

Active Publication Date: 2020-09-11
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Problems solved by technology

For the strong shock wave generated by the explosion, the traditional rigid explosion-proof structure uses its own high wave impedance to reflect most of the shock wave, and mainly disperses and transfers the explosion energy. While having a strong protection ability, it has the disadvantages of heavy weight and poor mobility. And as a fragment itself, it may cause secondary fragment damage, so the disposal device for improvised explosives gradually presents a development trend of light weight and no secondary damage

Method used

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  • Polyurethane/ liquid-based composite explosion-proof structure and preparation method thereof
  • Polyurethane/ liquid-based composite explosion-proof structure and preparation method thereof
  • Polyurethane/ liquid-based composite explosion-proof structure and preparation method thereof

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] This embodiment provides a composite explosion-proof structure based on polyurethane / liquid. The composite explosion-proof structure is a structure made of multi-layer cylindrical rings. When explosion-proof, explosives are located inside the ring structure. The liquid-filled polyurethane layer 2 and the liquid layer 1 are arranged at intervals, the number of layers is even, the innermost layer is the liquid-filled polyurethane layer 2, and the outermost layer is the liquid layer 1.

[0034] Such as figure 1 , figure 2 As shown, the composite explosion-proof structure in this embodiment adopts four layers, which are polyurethane layer 2 filled with liquid, liquid layer 1, polyurethane layer 2 filled with liquid, and liquid layer 1 from the inside to the outside. The polyurethane foam matrix of the polyurethane layer 2 filled with liquid contains ...

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Abstract

The invention discloses a polyurethane / liquid-based composite explosion-proof structure and a preparation method thereof. The composite explosion-proof structure comprises more than one group of composite explosion-proof units which are sequentially stacked, wherein each composite explosion-proof unit comprises a liquid-filled polyurethane layer and a liquid layer; the liquid-filled polyurethanelayers and the liquid layers in the formed composite explosion-proof structure are arranged at intervals; and the layer closest to an explosive is the liquid-filled polyurethane layer of the compositeexplosion-proof structure when the composite explosion-proof structure is used. The composite explosion-proof structure disclosed by the invention is high in explosion-proof ability, light in structural weight and free of secondary incidental damage; and the preparation method is high in preparation efficiency.

Description

technical field [0001] The invention relates to the field of explosion-proof technology, in particular to a polyurethane / liquid-based composite explosion-proof structure and a preparation method thereof. Background technique [0002] At present, explosive terrorist attacks have become the most commonly used form of activities by terrorists. In order to deal with the major threats to public security at home and abroad, convenient and efficient security measures are urgently needed. For the strong shock wave generated by the explosion, the traditional rigid explosion-proof structure uses its own high wave impedance to reflect most of the shock wave, and mainly disperses and transfers the explosion energy. While having a strong protection ability, it has the disadvantages of heavy weight and poor mobility. And as a fragment itself, it may cause secondary fragment damage, so the disposal device for improvised explosives gradually presents a development trend of light weight and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D5/045C08J9/40C08L75/04
CPCC08J9/40C08J2375/04F42D5/045
Inventor 黄广炎周颖邹美帅张旭东田广卫
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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