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V. Sobyna, D. Taraduda, M. Dement. Improvement constructions cylinders of breathing apparatuses on compressed air. P. 90-101.

 

Improvement constructions cylinders of breathing apparatuses on compressed air

 

Vitaliy Sobyna

National University of Civil Defenсe of Ukraine

http://orcid.org/ 0000-0001-6908-8037

 

Dmutro Taraduda

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0001-9167-0058

 

Mukhaylo Dement

National University of Civil Defenсe of Ukraine

http://orcid.org/ 0000-0003-4975-384Х

 

DOI: https://doi.org/10.52363/2524-0226-2022-36-8

 

Keywords: breathing apparatuses on compressed air, cylinder, polymer-composite material, liner

 

Аnnotation

A study was conducted to increase the reliability, durability, and weight reduction of cylinders for compressed air breathing apparatus of rescue service units. The design of composite cylinders with high-pressure air with improved characteristics, such as strength, permeability and ensuring hygienic standards, was developed, and with the aim of further verification of the proposed design, calculations were carried out, on the basis of which the possibility and feasibility of manufacturing high-pressure cylinders from mineral fiber in combination was confirmed with a binder, which is characterized by a relatively low cost and manufacturability when produced by traditional methods. The research was carried out with the aim of: developing a balloon design of high mass perfection and cost less than a similar metal-plastic balloon; ensuring the necessary carrying capacity of cylinders; determination of air permeability through the liner wall; determination of the type and amount of organic compounds released from the ma-terial of the liners during the storage of the cylinder filled with air. As a result of the research, it was established that: a cylinder with a liner with a wall thickness of 2.2 mm will lose its tightness after 45 days of exposure at a working pressure of 30 MPa due to a poorly made press mold, thinning of the liner in this place to 1.3 mm; a cylinder with a liner with a wall thickness of 4 mm at an operating pressure of 30 MPa, when observed for 135 days, will lose only 30 g in weight. A study of the hygienic characteristics of the cylinders showed that after exposure for 30 days at a temperature of 20 ˚C at an operating pressure of 30 MPa, in the air environment of the cylinders organic substances belonging to the class of aliphatic alcohols were found. Research proves the high efficiency of the use of composite-polymer cylinders for the purpose of preventing emer-gency situations at the facilities where they are operated, which confirms their usefulness and im-portance.                                                                                             

 

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