Theoretical research on steady-state and closing value characteristics of liquid level control value
Authors
-
Chang Chen -
Shiqiang Song
-
Shifu Zhang
-
Jikun Guo
-
Qixin Zhang
-
Jianyong Yang
DOI:
https://doi.org/10.18311/jmmf/2018/28283Keywords:
Theoretical research, steady-state, closing value characteristics, liquid level control valueAbstract
During the refuelling process, the float switch closes when the internal tank liquid level reaches the highest level, but the automatic control valve cannot be closed simultaneously. If the delay time is too long, it may lead to an oil spill accident. In this paper, we analyzed the structure and basic working principle of the liquid level control. In addition, the flow of the automatic control valve, the force condition of the value core, the time required for closing the value, the speed and accelerated velocity of value core movement were theoretically studied according to the fluid momentum theorem and the kinematic equation of the valve closing process, which is of great practical significance for advancing research level of liquid level control valve.References
Buchtel, M. E. (2012): Fluid level control toggle valve device and method: US, 8,091, 581 [P]. 2012-1-10.
Cao, F., Wang, Y., Yantao, A. N. and Xie, Y. (2011): "Fluid-structure Interaction Analysis for Large-scale Gas Control Valve.” Machine Tool & Hydraulics, 455(11): 146-150.
Chao, Z. (2004): "Analysis on characteristic of relief of retarder.” Retarders and Speed Control Technology, 21(4): 3-6.
Dongchu, S. and Shuhua, F. (1995): Hydraulic Drive Technology Course [M]. BeiJing: Beijing Institute of Technology Press, 1995.
Eatwell, W. D. (1988): Liquid level control subsurface valve reduces workover expense in artificial lift pump installations; proceedings of the SPE Annual Technical Conference & Exhibition, October 2, 1988 - October 5, 1988, Houston, TX, USA, F, 1988 [C]. Publ by Soc of Petroleum Engineers of AIME.
Khoei, A., Hadidi, K., Khorasani, M. R. and Amirkhanzadeh, R. (2005): "Fuzzy level control of a tank with optimum valve movement.” Fuzzy Sets and Systems, 150(3): 507-523.
Liu, C. (2013): "Application of new type liquid level sensor and motor valve into liquid level control.” Refrigeration and Air-Conditioning, 13(3): 26-29.
Wang, Y., Gao, L., Ge, J., Gao, H. and Zhang, J. (2014): "The numerical simulation analysis of flow field in level control valve of water storage tank.” International Journal of Control and Automation, 7(10): 45-52.
Wang, Z. Y., Tang, Y. C. and Liu, Z. G. (2008): "The Design of Refuelling Control Valve and Liquid Level Controller Test System.” Chinese Hydraulics & Pneumatics, 32(7): 16-17.
Zhang, Z., Li, B. and Gao, J. (2011): "Analysis on failure causes for level control value in absorberb and retrofit.” Large Scale Nitrogenous Fertilizer Industry, 34(1): 31-32.
