EVALUATION OF RESPIRATOR RELIABILITY

Details

Parent Category: Geo-Technical Mechanics, 2013

Category: Geo-Technical Mechanics, 2013, Issue 112

UDC 622.814.89

Authors:

S.I. Cheberyachko, Ph. D. (Tech.), Associate Professor,

D.I. Radchuk, Ph. D. (Tech.), Associate Professor,

Yu.I. Cheberyachko, Ph. D. (Tech.), Associate Professor,

N.N. Naumov, Doctoral Student

(SHEE «NMU»)

Abstract: Influence of the flying dust on the protective efficiency of respirators was analyzed with taking into account duration of their use in the working conditions. It is stated that when the filter resistance achieves a critical level the aerosol is sucked in through the obturation bar slots rate of which depends on the face shape, material of the half mask  and expired valve type and impermeability.  Coefficients were specified for protective efficiency maintenance depending on the respirator use duration, and a dependence was defined between the penetration coefficient and resistance to breathing with taking into account specific working conditions.

In order to diminish the suction and to improve reliability of personal protection it is necessary, when designing any dust facilities for personal breathing protection (FPBP), to:

- design obturators with taking into account quality of filtering elements and duration of their exploitation;

- increase the contact closeness under the obturation bar through the reduced rigidity and width of the obturator surface and material elasticity and properly chosen points for fastening the headband;

- make recommendations for individual half-mask fitting which would provide a stable position of the FPBP on the face.

Keywords: protective efficiency of respirator, resistance of filtration, impermeability of expired valves.

References:

1. Derzhstatdart Ukrayini  (1994), DSTU 2860 – 94 Nadiynist techniki. Termini ta viznachennya [SSTU 2860.94. Reliability of technique. Terms and determinations], Nadiynist mashin I sporud, Kiev, Ukraine.

2. Tretyakova, L.D. nand Bychenko, P.S. (2009), «Mathematical model of reliability of facilities of individual defence», Visnik Natsionalnogo naukovo-doslidnogo institutu okhorony pratsi, NNDIOP, no. 7, hh.288-295.

3.  Tretyakova, L.D. and Sidorko M.V. (2009),  «Efficiency of the systems of reservation of protective facilities», Mistobuduvannya ta terutorialne planuvannya, no. 32, pp. 433-444

4. Litvinenko, G.Ye. and Tretyakova, L.D. (2008), «Mathematical model of reliability of facilities of individual defence in economic calculations», Visnuk KNUTD, no. 5, pp. 113-122.

5. Mazepin S.A. «Method of the appreciate terms of carry of MID and their economic effectiveness, Sredstva individualnoy zashchity, no.7, pp.75-79

6. Golinko, V.I., Cheberyachko, S.I. and Cheberyachko, Yu.I. (2008), Zastosuvannya respiratoriv na vugilnich I girnyichorudnikh pidpriyemstvakh [Application of respirators on coal and mining enterprises], NMU, Dnepropetrjvsk, Ukraine.

7. Кirsh, V.A. and Stechkina, I.B. Kinetika zabivki I optimizaciya predfiltrovv dvustupenchatoy sisteme ochistky vozdukha [Kinetics of blinding and optimization predultimate-filters in the two-stepped system cleanings of air], Teoreticheskiye osnovy khimicheskoy tekhnologii, vol.44, no.1, pp. 78 - 87.

8. Radchuk, D.I. (2011), «Increase of protective efficiency of non-permanent against-dust respirators], abstract of Ph. D. dissertation, 05.26.01 «Okhorona pracy», Derzhavny VNZ «NGU»,Dnepropetrovsk, Ukraine.

9. Cheberyachko, S.I. and  Radchuk, D.I. (2011), «Analysis of constructions of valves of exhalation of against-dust respirators», Scientific announcer NGU, no. 4, pp. 94-98

About the authors:

Cheberyachko Sergey Ivanovich,Ph.D.(Tech.), Associate Professor of chair of Aerology and protection of labour Derzhavny VNZ «NGU», Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Radchuk Dmitriy Igorevich, Ph.D.(Tech.), Associate Professor of chair of Aerology and protection of labour Derzhavny VNZ «NGU», Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Cheberyachko Yuriy Ivanovich,Ph.D.(Tech.), Associate Professor of chair of Aerology and protection of labour Derzhavny VNZ «NGU», Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Naumov Mykola Mykolayovich, Master of Science of chair of Aerology and labor protection department Derzhavny VNZ «NGU», Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

 

 

 

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