联锁切断阀气路优化

Interlock Shut-off Valve Manifold Optimization

化工生产事故状态下,联锁切断阀快速动作起到紧急停车确保人员、环境、设备安全的作用。本文探讨优化联锁切断阀控制气路方案,达到加快联锁切断阀动作速度的目的。以典型的切断阀执行机构为例,找出影响双气缸活塞式执行机构移动时间系数K,与惯性系数J、摩擦系数G的关系。针对回路有效截面积S、供气压力PH两个变量,通过安装快速排气阀得以加大气缸泄气量,增大储气罐压力进而增大活塞推力的方法。实现了减少执行机构动作时间,提高生产装置运行的可靠性、稳定性的目的。在化工生产实际工作中,为了满足事故状态下联锁切断阀快速动作的要求,在条件容许情况下加装快速排气阀和提高供气压力,是最效果明显的方法。

Under the state of the production of chemical accidents, shut-off valve interlock emergency stop play fast action to ensure that personnel, the environment, equipment safety role. This paper discusses the optimization interlock pneumatic shut-off valve control program, to speed up the purpose of the operation speed of the shut-off valve interlock. Typical shut-off valve actuators, for example, identify the impact of two-cylinder piston actuator travel time coefficient K, and inertia coefficient J, the relationship between the friction coefficient of G. For loop effective cross-sectional area S, gas pressure Pn two variables, by installing a quick exhaust valve to increase the amount of cylinder discouraged, thereby increasing the gas tank pressure increases piston thrust approach. To achieve a reduction of the actuator operation time, improve the reliability of plant operation, the purpose of stability. In chemical production practice, under accident conditions in order to meet fast action shut-off valve interlock requirements, in conditions that allow the installation of a quick exhaust valve and increase supply pressure case, the effect is the most obvious way.