METHODS OF CALCULATING AND RATIONAL DESIGN OF REINFORCING CARCASSES OF TENSION FIREHOSES ON BASIS OF SYNTHETIC FIBERS

DOI: 
10.6060/tcct.20165910.5407

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 10. P. 83-87

The method of calculation and rational design of reinforcing carcasses of pressure fire hoses (PFH) on the basis of a mathematical expression linking discontinuous internal hy-draulic pressure in the tension firehoses with breaking load in the weft and a number of other parameters was proposed. The necessity of the development of this method, which provides a minimum flow in the manufacture of synthetic fibers at the production of reinforcing carcass, was substantiated. The proposed method of calculation and rational design of the hoses com-prises the following steps: selection and definition of the initial data for the calculation of the strength of the reinforcing carcass of hose at the hydraulic impact; calculation of the internal rupture hydraulic pressure in the hose at the several variants of initial data by the mathemati-cal expression; selection of the most rational variant of the calculation of the reinforcing car-cass of hose in terms of minimization of costs of material fibers with mandatory compliance of the State Standard R 51049-97 requirements on the breaking pressure. On the base of the de-veloped method patents were received for use in the hoses instead of polyester fibers, fibers of ultrahigh molecular weight polyethylene (UHMWPE fibers), different from conventional fibers exceptionally with high strength and abrasion resistance. The use of the pressure fire hoses shows that the main reason for break at their exploitation is abrasive wear of the reinforcing carcass. In this regard, the use of UHMWPE fibers and fibers of polyamide 66 having a high resistance to abrasion can be considered as one of the most promising directions for the pro-duction of pressure fire hoses. Application of the developed method of calculation of strength and rational design of reinforcing carcass of hoses along with the use instead of traditional fi-bers, fibers of ultrahigh molecular weight polyethylene will lead to the creation of new compet-itive high-technical pressure fire hoses.

Key words: tension firehose, fabric reinforcing carcass, polyether fiber, calculation and rational design method

REFERENCES
1. Aripbaeva A.E., Myrkhalykov Zh.U., Bazarov Yu.M., Stepanov S.G. Perspective direction in the field of calculation and de-sign of reinforcing carcasses of pressure fire hoses on the base of synthetic fibres. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 7. P. 92-95 (in Russian).
2. RF State Standard P 51049-97. Fire engineering. Pressure fire hoses. General technical requirements. Test methods.(in Russian).
3. Stepanov O.S., Chistoborodov G.I., Shomov P.A. RF Patent N 130859. 2013 (in Russian).
4. Stepanov O.S., Stepanov S.G., Shomov P.A. RF Patent N 140574. 2013 (in Russian).

2016, Т. 59, № 10, Стр. 83-87

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