DOI: https://doi.org/10.15587/1729-4061.2018.144874

Improvement of a discharge nozzle damping attachment to suppress fires of class D

Vasyl Kovalyshyn, Volodymyr Marych, Yaroslav Novitskyi, Bogdan Gusar, Volodymyr Chernetskiy, Olexandr-Zenoviy Mirus

Abstract


The software package COSMOSFloWorks has been used to study a discharge nozzle damping attachment. A procedure has been proposed to estimate the covering of surface with dimensions of 0.4×0.4 m by a fire-extinguishing powder. It was established that existing discharge nozzle damping attachments are not efficient because at extinguishing light metals they do not effectively reduce the speed of powder supply onto a flammable surface and fan the fire, not being able to cover the burning surface by a fire-extinguishing powder. After putting out the fire the surface that was covered with powder reveals the burnouts. We have modeled the optimal structural parameters for a discharge nozzle damping attachment in order to extinguish fires of class D in the form of a discharge nozzle damping attachment with an elliptical top and a parabolic reflector. It has been proven that a damping attachment with two working surfaces outperforms the previous damping attachment with a single working surface by 30 %. Given this, the fire-extinguishing powder covers the burning surface by a larger layer, preventing the fanning of chips from the surface of a burning metal, thereby shortening the duration of burning and improving the efficiency of a fire-extinguishing powder supply. Experimental study has confirmed that the use of a damping attachment that supplies a fire-extinguishing powder with two working surfaces in order to extinguish fires of class D increases the powder feed to a fire site, reaching above 90 %.

The diameter and the shape of the attachment have been determined. The attachment must acquire the form of a diffuser with a diameter of 16 mm.

Our development could be used when designing the stationary and portable fire extinguishing systems for light metals and alloys, including incendiary grenades under condition of proper selection of the powder. We have achieved positive results during field tests of the discharge nozzle damping attachment using a make-up fire to burn the shavings of magnesium alloys

Keywords


discharge nozzle damping attachment; fire of light metals; extinguishing the fire of magnesium; optimal pressure; optimal distance

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References


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GOST Style Citations


Problemy hasinnia mahniu ta yoho splaviv / Kovalyshyn V. V., Mirus O. L., Marych V. M., Kovalyshyn Vol. V., Lozynskyi R. Ya. // Zbirnyk naukovykh prats LDU BZhD. 2016. Issue 28. P. 58–63.

Potężny pożar fabryki PolMag w Olszowej. Płonie 47 ton magnezu. URL: https://nto.pl/potezny-pozar-fabryki-polmag-w-olszowej-plonie-47-ton-magnezu/ar/8962865

Magnesium-Brand richtet bei Sonneberg Millionenschaden an. URL: https://www.thueringer-allgemeine.de/web/zgt/leben/blaulicht/detail/-/specific/Magnesium-Brand-richtet-bei-Sonneberg-Millionenschaden-an-1529078490

Optimization of the dry chemical powders’ composition for class D1 fires extinguishing / Marych V., Kovalyshyn V. V., Kyryliv Y., Kovalchyk V., Gusar B., Koshelenko V. // Fire Safety. 2018. Issue 32. P. 45–54. doi: https://doi.org/10.32447/20786662.32.2018.07 

Dovidnyk riatuvalnyka na vypadok vynyknennia nadzvychainykh sytuatsiy z nebezpechnymy khimichnymy rechovynamy. Lviv: «Spolom», 2012. 377 p.

Doslidzhennia khimichnykh rechovyn, yak skladnykiv vohnehasnykh poroshkiv dlia hasinnia lehkykh metaliv / Kovalyshyn V. V., Marych V. M., Kyryliv Ya. B., Koshelenko V. V., Mirus O. L. // Pozhezhna bezpeka LDU BZhD. 2016. Issue 29. P. 46–56.

GOST R 53280.5.-2009. Ustanovki pozharotusheniya avtomaticheskie. Ognetushashchie veshchestva. No. 55. Moscow, 2009. 11 p.

Gabrielyan S. G. Primenenie argona dlya pozharotusheniya struzhki splavov magniya i titana, obrazuyushcheysya pri obrabotke na stankah s chislovym programmnym upravleniem i obrabatyvayushchih centrah // Pozharnaya bezopasnost'. 2017. Issue 4. P. 45–51.

Balanyuk V., Kovalishin V., Kozyar N. Prevention of n-geptan gas mixtures with the help of combined systems of shock waves and volume firefighting substances // ScienceRise. 2017. Issue 11 (40). P. 21–24. doi: https://doi.org/10.15587/2313-8416.2017.116177 

Rakowska J., Radwan K., Ślosorz Z. Comparative Study of the Results of the Extinguishing Powder Grain Size Analysis Carried out by Different Methods // BiTP. 2014. Vol. 34, Issue 2. P. 57–64. doi: https://doi.org/10.12845/bitp.34.2.2014.5

Balaniuk V. M., Koziar N. M., Harasymiuk O. I. The usage of gas and aerosol powder extinguishing mixtures for protection of incendiary mixtures // ScienceRise. 2016. Vol. 5, Issue 2 (22). P. 10–14. doi: https://doi.org/10.15587/2313-8416.2016.69333 

Vplyv nasadok-zaspokoiuvachiv na efektyvnist hasinnia pozhezh klasiv D1 / Kovalyshyn V. V., Marych V. M., Mirus O. L., Lozynskyi R. Ya., Husar B. M., Bortnyk M. Ya. // Visnyk LDU BZhD. 2018. Issue 17. P. 93–101.

Antonov A. V., Stylyk I. H. Metody vyprobuvan vohnehasnykh poroshkiv z vyznachennia yikh vohnehasnoi zdatnosti za klasom pozhezhi D // Visnyk UkrNDIPB. 2013. Issue 2 (28). P. 242–248.

CANNLC-S508-M90, Standard for the Raring and Fire Testing of Fire Extinguishers and Class D Extinguishing Media. Underwriters’ Laboratories of Canada, 1996.

Ständige Konferenz der Innenminister und – senatoren der Länder, Arbeitskreis V, Ausschuss für Feuerwehrangelegenheiten, Katastrophenschutz und zivile Verteidigung. Evaluierung neuer Löschverfahren bei Metallbränden Heyrothsberge, 2017.

Class D Powder Fire Extinguisher. URL: https://www.youtube.com/watch?v=-sJ5TlaYPGs

Class D fires – Chubb Pyromet Extinguisher. URL: https://www.youtube.com/watch?v=CTFxCr_Oy94

Dudareva N. Yu., Zagayko S. A. SolidWorks 2007 Naibolee polnoe rukovodstvo. Sankt-Peterburg: BHV-Peterburg, 2007. 1328 p.

SolidWorks 2007/2008. Komp'yuternoe modelirovanie v inzhenernoy praktike / Alyamovskiy A. F., Sobachkin A. A., Odincov E. V., Haritonovich A. I., Ponomarev N. B. Sankt-Peterburg: BHV-Peterburg, 2008. 1040 p.

Ohurtsov S. Yu., Stylyk I. H., Antonov A. V. Analiz metodiv vyprobuvan vohnehasnykh poroshkiv z vyznachennia yikh vohnehasnoi zdatnosti // Visnyk UkrNDIPB. 2013. Issue 1 (27). P. 86–91.

Kurepin A. E., Karlik V. M., Sichkorenko L. A. Sposob tusheniya metallov: Pat. No. 2119368 RF. MPK: 6A 62D 1/00 A. No. 97105933/25; declareted: 11.04.1997; published: 27.09.1998.







Copyright (c) 2018 Vasyl Kovalyshyn, Volodymyr Marych, Yaroslav Novitskyi, Bogdan Gusar, Volodymyr Chernetskiy, Olexandr-Zenoviy Mirus

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ISSN (print) 1729-3774, ISSN (on-line) 1729-4061