Automatic inflation lifesaving bra

Abstract

The invention relates to a water lifesaving device, in particular to an automatic inflation lifesaving bra. The automatic inflation lifesaving bra comprises an annular airbag provided with two straps. The inner side, close to the chest, of the annular airbag is provided with an elastic plastic support board corresponding to the chest, the elastic plastic support board is bonded with the inner side of the airbag, a cavity is formed in the elastic plastic support board, a cut-off valve which is used for communicating the cavity with the annular airbag is arranged on the elastic plastic support board, and the cavity is filled with dichlorodifluoromethane and trichlorofluoromethane with the volume ratio being 1:0.8-1.2. The automatic inflation lifesaving bra has the characteristics of high security, quick inflation and low cost, and can be widely popularized and used by swimmers.

Description

technical field [0001] The invention relates to a lifesaving device in water, in particular to an automatic inflatable lifesaving bra. Background technique [0002] The existing automatic inflatable life-saving devices in water use calcium carbide and water to react to produce acetylene to inflate. Although the reaction is fast, acetylene is a highly flammable gas and has certain dangers; some use gunpowder, which burns and emits a large amount At the same time, the gas will also generate a large amount of heat, which has higher requirements on the device and is more dangerous; there is a principle of using liquid oxygen or carbon dioxide to change the volume of gaseous oxygen or carbon dioxide to provide buoyancy, or It uses high-pressure gas to change low-pressure gas to inflate, but these two methods have very high requirements for gas storage devices, and generally require high-strength gas storage devices, which increases the weight and cost of life-saving devices; ther...

AI Technical Summary

Problems solved by technology

[0002] The existing automatic inflatable life-saving devices in water use calcium carbide and water to react to produce acetylene to inflate. Although the reaction is fast, acetylene is a highly flammable gas and has certain dangers; At the same time, the gas will also generate a lot of heat, which has higher requirements on the device and is more dangerous; there is a principle that the volume of oxygen or carbon dioxide in the liquid state becomes gaseous to increase to provide buoyancy, or It uses high-pressure gas to change low-pressure gas to inflate, but these two methods have very high requirements for gas storage devices. Generally, high-strength gas storage devices are required, which increases the weight and cost of life-saving devices; other chemical methods are also used. Those that produce gas, however, react slowly and cannot inflate quickly and effectively, posing a certain risk to drowning victims

Images