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Int J Fire Sci Eng > Volume 30(4); 2016 > Article
Fire Science and Engineering 2016;30(4):46-58.
DOI: https://doi.org/10.7731/KIFSE.2016.30.4.046    Published online August 31, 2016.
CPVC 밸브소켓 체결토크가 누수발생에 미치는 영향
임춘기, 백은선
1동신대학교 소방학과
2동신대학교 소방학과
CPVC Valve Tightening Torque Impact Sockets on the Leaks
Lim Chun-Ki, Baek Eun-Sun
1Dept. of Fire Administration, Dong-shin Univ.
2Dept. of Fire Administration, Dong-shin Univ.
요약
본 연구는 스프링클러설비용 소방용 합성수지배관에서 누수원인으로 예측되는 과도 조임에 따른 밸브 소켓 나사부의 영향을 분석하기 위하여 컴퓨터 시뮬레이션을 이용하여 밸브소켓 체결토크가 $10{sim}130N{cdot}m$일 때 나사부에 걸리는 응력, 변형률, 변위, Von mises stress 및 수밀용 고무패킹에 걸리는 압축응력을 예측하였으며, 이를 검증하기 위하여 토크미터를 이용한 체결토크별 접속 나사산 수, 밸브소켓과 고무패킹의 변형상태 및 수격실험을 실시하여 적정한 체결토크 값과 고무패킹 압축응력 값을 연구하였다. 본 연구 결과가 소방용 합성수지배관 누수방지를 위한 관련 규격 또는 기술기준 개정에 필요한 자료로 활용될 수 있도록 기대한다.
Abstract
In this study, the stress applied to screw section, strain, displacement, von Mises stress, and the compression stress applied to the rubber packing for watertightness are estimated with computer simulation when the tightening torque of valve socket is in the range of $10{sim}130N{cdot}m$ in order to analyze the influence of valve socket screw section in accordance with the excessive tightening which is supposed to be the cause of water leakage from the synthetic resin piping for fire fighting application of sprinkler equipment, and for the sake of verifying this, adequate value of tightening torque and the value of the compression stress of rubber packing are investigated by examining the number of connected thread for each tightening torque, the deformation state of valve socket and rubber packing and conducting the water hammering test. The result of this test is expected to be utilized as the data required for revising the standard or technical criteria to prevent the water leakage of the synthetic resin piping for fire fighting application.
Key Words: Computer simulation, Tightening torque, Von mises stress
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