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A polyurethane foam combined explosion-proof device and polyurethane foam material

A polyurethane foam and explosion-proof device technology, which is applied in blasting and other directions, can solve the problems that the explosion-proof performance needs to be further improved, and achieve the effects of improving energy absorption efficiency, reducing strength, and prolonging interaction time

Active Publication Date: 2021-06-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional simple explosion-proof devices are generally hollow cylindrical cylinders, and their explosion-proof performance needs to be further improved

Method used

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  • A polyurethane foam combined explosion-proof device and polyurethane foam material
  • A polyurethane foam combined explosion-proof device and polyurethane foam material
  • A polyurethane foam combined explosion-proof device and polyurethane foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A polyurethane foam material, said material is prepared by the above method:

[0051] (1) Preparation of component A: 100 parts by mass of polyoxypropylene polyol, 15 parts by mass of blowing agent, 1.5 parts by mass of foam stabilizer, 1.2 parts by mass of catalyst, 2 parts by mass of chain extender, 3 parts by mass of surface silanization Carbon black and 1 mass part of multi-walled carbon nanotubes are uniformly mixed to obtain component A; wherein, the blowing agent is H with a mass ratio of 3:1 2 O and fluorotrichloromethane; the catalyst is dibutyltin dilaurate; the chain extender is diethyltoluenediamine, ethylene glycol and 1,4-butanediol in a mass ratio of 5:2:2; multi-wall The carbon nanotubes have a diameter of 20-40nm and a length of 1-2μm;

[0052] (2) Preparation of component B: add 0.01 mass part of polymerization inhibitor to 50 mass parts of diphenylmethane diisocyanate (MDI) and 50 mass parts of polyurethane tetrahydrofuran polyol to obtain B componen...

Embodiment 2

[0059] A polyurethane foam combined explosion-proof device, including a cylinder 4 and a cover, the material of the cylinder 4 is polyurethane foam, and the cover includes a polyurethane foam cover 3 and a liquid cover 1, wherein the polyurethane foam cover 3 is located The upper end of the cylinder body 4 is embedded inside the cylinder body 4. The depth of the polyurethane foam cover 3 embedded in the cylinder body is adjustable. The liquid cover 1 is located above the cylinder body 4 and covers the polyurethane foam cover 3. At the same time, the liquid cover 1 and polyurethane Air gaps 2 are left between the foam covers 3 .

[0060] The liquid in the liquid cover 1 is water. The cylinder body 4 and the polyurethane foam cover 3 both use the polyurethane foam material described in Example 1.

[0061] The explosion-proof device also includes a protective base 5, which is located at the inner bottom of the cylinder 4; the material of the protective base 5 is the polyurethane...

Embodiment 3

[0074] In this embodiment, the explosive is 125g of TNT, with a radius of 25mm and a height of 40mm.

[0075] Adopt the device described in embodiment 2 and comparative example 3 to carry out the numerical simulation test of explosion shock to described explosive respectively, the shock wave pressure contrast cloud picture of different moments after described explosive explodes is as follows Figure 4 As shown, compared with the device described in Comparative Example 3, the development direction of the shock wave at the top of the device described in Example 2 is guided, and the strong shock wave reflected and superimposed inside the protective structure is dispersed to the circumferential direction between the polyurethane foam cover and the cylinder. The gap is leaked, and the liquid layer on the outside has a large wave impedance, which can quickly absorb the shock wave leaked from the polyurethane layer of the cover body; Leakage occurs at the contact interface between th...

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Abstract

The invention relates to a polyurethane foam combined explosion-proof device and a polyurethane foam material, belonging to the technical field of explosion-proof structures. The device includes a cylinder and a cover, the cylinder is made of polyurethane foam, the cover includes a polyurethane foam cover and a liquid cover, the polyurethane foam cover is located at the upper end of the cylinder and embedded in the cylinder, and the polyurethane foam cover is embedded The depth inside the barrel is adjustable, the liquid cover is located above the barrel and covers the polyurethane foam cover, and an air gap is left between the liquid cover and the polyurethane foam cover. The device has good explosion-proof performance. The polyurethane foam material described in the polyurethane foam is compounded with surface silanized carbon black, carbon nanotubes and polyurethane, and the two synergistically increase the cohesive energy of the material, improve the mechanical properties of polyurethane, and achieve the effect of strengthening and toughening.

Description

technical field [0001] The invention relates to a polyurethane foam combined explosion-proof device and a polyurethane foam material, belonging to the technical field of explosion-proof structures. Background technique [0002] Taking the safe disposal of explosives by public security anti-terrorism and explosion-proof personnel as the research background, in order to deal with the threat of social security at home and abroad caused by extremists, there is an urgent need for convenient and effective lightweight protective structures to provide efficient explosives disposal methods. For the explosion shock wave, the traditional rigid explosion-proof structure mainly uses the characteristics of high-impedance materials to realize multiple reflections of the shock wave through the confined space, and then disperses and transfers the explosion energy, which can effectively suppress the explosion of explosives below the protection equivalent limit. However, due to the suddenness,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D5/045C08G18/76C08G18/66C08G18/48C08J9/08C08J9/14C08K9/06C08K3/04
CPCC08G18/48C08G18/4804C08G18/4854C08G18/6685C08G18/7671C08J9/0071C08J9/009C08J9/08C08J9/147C08J2203/02C08J2203/144C08J2203/184C08J2375/08C08K3/04C08K9/06C08K2201/003C08K2201/004C08K2201/011C08K3/041F42D5/045
Inventor 黄广炎周颖邹美帅王涛张旭东
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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