The invention particularly relates to a steam safety valve set pressure value adjusting device, which comprises a double-acting hydraulic jack, a pressure sensor, a pressure sensor, a pressure sensor, a pressure sensor, a pressure sensor and a pressure sensor, and is characterized in that the double-acting hydraulic jack is mounted on an upper spring seat of a steam safety valve and is used for driving the upper spring seat to ascend or descend; the displacement sensor is mounted on the double-acting hydraulic jack and used for acquiring a displacement signal of an upper spring seat of the steam safety valve and sending the displacement signal to the PLC; the pressure sensor is mounted on the double-acting hydraulic jack and used for acquiring a pressure signal of an upper spring seat of the steam safety valve and sending the pressure signal to the PLC; the PLC is used for receiving the displacement signal sent by the displacement sensor and the pressure signal sent by the pressure sensor, setting target displacement and target pressure of an upper spring seat of the steam safety valve, generating a control signal according to a difference value between the displacement of the upper spring seat of the steam safety valve and the target displacement and a difference value between the pressure and the target pressure, and sending the control signal to the pressure sensor; and the double-acting hydraulic jack is controlled to ascend or descend according to the control signal. According to the steam safety valve setting pressure value adjusting device, when the setting pressure value of the main steam safety valve is adjusted, the compression spring is synchronously jacked and balanced, the spring force is synchronously and balanced unloaded, the problem that the main steam safety valve jumps mistakenly due to spring unbalance loading is avoided, and the spring is prevented from returning back after multiple times of jumping.
本发明具体涉及一种蒸汽安全阀整定压力值调整装置,包括:双作用液压千斤顶,安装在蒸汽安全阀的上弹簧座上,用于带动蒸汽安全阀的上弹簧座上升或下降;位移传感器,安装在双作用液压千斤顶上,用于获取蒸汽安全阀的上弹簧座的位移信号向PLC控制器发送;压力传感器,安装在双作用液压千斤顶上,用于获取蒸汽安全阀的上弹簧座的压力信号向PLC控制器发送;PLC控制器,用于接收位移传感器发送的位移信号和压力传感器发送的压力信号,设定蒸汽安全阀的上弹簧座的目标位移和目标压力,根据蒸汽安全阀的上弹簧座的位移与目标位移的差值以及压力与目标压力的差值生成控制信号,根据所述控制信号控制双作用液压千斤顶上升或下降。本发明的蒸汽安全阀整定压力值调整装置,实现主蒸汽安全阀整定压力值调整时同步顶升均衡压缩弹簧和同步均衡卸载弹簧力,避免弹簧偏载导致主蒸汽安全阀误跳的问题,避免多次起跳弹簧回正。
Device for adjusting set pressure value of steam safety valve
一种蒸汽安全阀整定压力值调整装置
2024-05-28
Patent
Electronic Resource
Chinese
IPC: | F16K VALVES , Ventile / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |
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