Intelligent emergency shut-off straight-stroke valve device and its application method

Abstract

The invention discloses an intelligent emergency cut-off straight-stroke valve device and a use method thereof, belonging to the technical field of oil and gas storage and transportation. It includes straight-stroke valves, hydraulic cylinders, switch indicator rods, pistons, piston rods, accumulators, gear pump modules, one-way valve modules, fuel tank modules, etc. The pistons are located in the hydraulic cylinder, and the hydraulic cylinder is divided into upper and lower parts. , which are the first hydraulic cylinder and the second hydraulic cylinder respectively. The first hydraulic cylinder is connected to the accumulator. The upper half of the accumulator is a high-pressure air bag, and the lower half is a high-pressure hydraulic oil. Transmitter B, pressure transmitter A is installed on the top of the accumulator; the second hydraulic oil cylinder is connected to the fuel tank module through hydraulic oil pipeline C; solenoid valve and fusible plug are installed on hydraulic oil pipeline C. The invention can be applied to the oil inlet and outlet pipelines of the storage tank, has the function of self-storage energy, and can rely on high-pressure hydraulic oil to realize emergency cutoff of the storage tank and the oil inlet and outlet pipelines under power failure and fire conditions.

Description

technical field [0001] The invention belongs to the technical field of oil and gas storage and transportation, and in particular relates to an intelligent emergency cut-off straight-stroke valve device and a use method. Background technique [0002] In the petrochemical storage tank fire and explosion accident, the accident was further expanded because the valve of the oil inlet and outlet pipeline of the storage tank was not cut off in time. The emergency shut-off valve can quickly cut off the oil pipeline in and out of the storage tank. Under the same thrust output, hydraulic actuators are smaller and lighter than pneumatic actuators, and have better applicability. CN205978743U discloses a valve actuator suitable for a gas-hydraulic combined spring, in which high-pressure gas enters the hydraulic cylinder, and then rapidly pushes the valve stem to move. Under long-term use, there will inevitably be leakage points in the hydraulic oil pipeline accessories of the emergency...

AI Technical Summary

Problems solved by technology

Under long-term use, there will inevitably be leakage points in the hydraulic oil pipeline accessories of the emergency shut-off valve, especially the normally open valve of the storage tank. Only in an emergency, the actuator will act and execute the valve closing process. Once the hydraulic oil pressure on the closing valve side is insufficient , it is impossible to quickly cut off the oil inlet and outlet pipelines, so the emergency shut-off valve should have a self-storage function

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