Underwater safety airbag (based on dry ice solid gas rapid conversion)

Abstract

The invention relates to an underwater safety airbag, which is designed for realizing the targets of small size and portability of personal life-saving appliances and utilizes the characteristics that dry ice (carbon dioxide solid particles) and normal saline can quickly turn into carbon dioxide gas after encountering at room temperature and dry ice solids have smaller size than gas carbon dioxide of an equal mass and are easy for carrying, etc. The underwater safety airbag is a closed system capable of carrying dry ice and normal saline and can quickly complete dry ice solid gas conversion in water (in an air isolated environment) so as to reach inflation by itself. The core component is a gas generation (inflation) device (adopting a double-container connection structure) that is prepared from a light compressive material and can carry dry ice and normal saline, and other components include an air bag and the like. In order to make the underwater safety airbag labor-saving and convenient during operation, the mechanism controlling the contact (start-up of dry ice solid gas conversion) of dry ice and normal saline and rapid inflation of the air bag specifically adopts a pull-type double-plug tandem connection structure, and at the same time in order to enhance the safety and reliability, the air bag is set into 3 layers, etc.

Description

1. Technical field [0001] 1. Dry ice is carbon dioxide solid, non-toxic, tasteless and non-corrosive. It will slowly turn into gas when it is exposed to the air at normal temperature, but it will quickly become gas (normal temperature) when it meets physiological saline (0.9% NaCl solution). The speed of this process is sharp and irreversible under normal pressure); and compared with the gas of the same mass of dry ice solid, the volume difference is huge (the difference is nearly a thousand times at normal temperature and pressure), such as 10 cubic centimeters of dry ice solid at normal temperature and pressure (heavy Less than 30 grams), into a gaseous state, the volume can reach thousands of cubic centimeters (several liters). [0002] 2. Dry ice solid is easy to store. Dry ice solid is a common substance in performing arts life. The equipment and materials required for storage at room temperature are easy to obtain, especially small doses of dry ice solid can be stored i...

AI Technical Summary

Problems solved by technology

[0016] In order to solve the problem of large volume and inconvenient portability of personal water lifesaving equipment, this solution uses the characteristics of small size of dry ice and fast conversion into gaseous state when it contacts with normal saline, etc. Environment) A closed system that quickly completes the transformation of dry ice into solid gas and inflates the airbag by itself—the underwater airbag ( figure 1 )

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