Intelligent emergency cutoff linear motion valve device and application method

Abstract

The invention discloses an intelligent emergency cutoff linear motion valve device and an application method and belongs to the technical field of oil and gas storage and transportation. The intelligent emergency cutoff linear motion valve device comprises a linear motion valve, a hydraulic oil cylinder, an on-off indication rod, a piston, a piston rod, an energy accumulator, a gear pump module, aone-way valve module, an oil tank module and the like. The piston is located in the hydraulic oil cylinder and divides the hydraulic oil cylinder into an upper part and a lower part, namely, a firsthydraulic oil cylinder body and a second hydraulic oil cylinder body. The first hydraulic oil cylinder body is connected with the energy accumulator. The upper half portion of the interior of the energy accumulator serves as a high-pressure air bag, and the lower half portion of the interior of the energy accumulator contains high-pressure hydraulic oil. A pressure transmitter B is arranged on a hydraulic oil pipe B, and a pressure transmitter A is arranged on the top of the energy accumulator. The second hydraulic oil cylinder body is connected with the oil tank module through a hydraulic oilpipe C A solenoid valve and a fusible plug are mounted on the hydraulic oil pipe C. The intelligent emergency cutoff linear motion valve device is suitable for an oil inlet / outlet pipe of a storage tank, has the energy self-accumulation function and can realize emergency cutoff of the storage tank and the oil inlet / outlet pipe through the high-pressure hydraulic oil under outage and fire states.

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

Images