International Journal of Advanced Culture Technology

The International Promotion Agency of Culture Technology (국제문화기술진흥원)
권호 표지
DOI QR코드

DOI QR Code

Measurement of the Time Taken for Initial Water Discharge According to the Number of Kinks in the Fire Hose of the Indoor Hydrant System

  • Hong, Suk-Hwan (Dept. of Fire and Disaster Prevention, Woosuk Univ.) ;
  • Kong, Ha-Sung (Dept. of Fire and Disaster Prevention, Woosuk Univ.)
  • Received : 2021.08.18
  • Accepted : 2021.09.04
  • Published : 2021.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we tried to examine how the kinking of the fire hose affects the time taken for initial water discharge by measuring and analyzing the time taken for initial water discharge with different number of kinks at different locations of the hose. The average time taken for initial water discharge was obtained by measuring the time in the unkinked state of the fire hose. Based on this standard, we conducted the experiment by selecting the kinking locations in the hose near the water outlet and nozzle, and setting the number of kinks to 3, 6, 9, and 12. The results of this study are as follows: First, if the fire hose has 5 kinks or more near the nozzle, no water was released. Second, when comparing the case of no kinks and 4 kinks near the nozzle, there was no significant difference in the time taken for initial water discharge. Third, when the fire hose was kinked 10 times near the outlet, the time required for initial water discharge increased by 1.62 seconds on average compared to the case with no kinking, but there was no problem with water discharge. Lastly, regarding the kinking locations of the fire hose, it was found that the greater the number of kinks near the nozzle than near the outlet, the greater the effect on the discharge. As a result, it is concluded that it would be preferable to install non-kinking devices near the nozzle of the fire hose.

Keywords

References

  1. Ministry of Government Legislation, Type Approval of Fire Hose and Technical Standard for Product Inspection Article 2 (Definition).
  2. S.-H. Min, Y.-J. Kwon. "A Study on the Friction loss reduction in fire hoses used at a fire scene," Fire Science and Engineering. Vol. 27, pp. 52-59, 2013. DOI : http://dx.doi.org/10.7731/KIFSE.2013.27.3.052
  3. H.-S. Kong, J.-M. Yun, J.-H. Lee, K.-C. Kim. "A Study on Connection of Fire Hose," Korea Safety Management & Science, Fall Conference, 2012.
  4. S.-J. Jo, B.-H. Kim. Fire hose for fire extinguishing to anti-kinking and bending. Korean patent 10-2008-0095974, 2008.
  5. S.-H. Park, B.-S. Son, J.-H. Choi, Y.-S. Kim, S.-O. Park. "A Review of Anti-twist Fire Hose," Korean Journal of Air-Conditioning and Refrigeration Engineering, Summer Conference. pp. 46~48, 2017.
  6. Ministry of Government Legislation, Type Approval of Fire Hose and Technical Standard for Product Inspection Article 2 Nos. 1 to 8 (Enforced on January 10, 2019).
  7. Ministry of Government Legislation, Type Approval of Fire Hose and Technical Standard for Product Inspection Article 2 Nos. 3 (Enforced on January 10, 2019).
  8. Ministry of Government Legislation, "Enforcement Decree of the Act on Fire Prevention, Installation and Maintenance of Firefighting Facilities, and Safety Management," [Annex 5] Amended on 1.5, 2021.
  9. Ministry of Government Legislation, Fire safety standards for indoor hydrant system, Article 7 (2), 2021.4.1. Partial revision.