Emergency shut-off straight stroke valve device based on flame detection and its application method

Abstract

The invention discloses an emergency cut-off straight-stroke valve device based on flame detection and a use method thereof, belonging to the technical field of oil and gas storage and transportation. It includes a straight-stroke valve, a piston rod, a hydraulic cylinder, a piston, a switch indicator rod, a flame detection module, a fuel tank and an accumulator. The piston divides the hydraulic cylinder into upper and lower parts, including the first hydraulic cylinder and the second hydraulic cylinder. A switch indicator rod is connected above the piston, which can move up and down with the piston. The flame detection module is installed on the top of the switch indicator rod; the first hydraulic cylinder is connected to the accumulator through the hydraulic oil pipeline B, and the upper part of the accumulator It is a high-pressure airbag, and the lower part is high-pressure hydraulic oil; the second hydraulic cylinder is connected to the oil tank through the hydraulic oil pipeline C, and the solenoid valve is connected to the flame detection module through a signal control line. The device of the invention is suitable for straight-stroke valves, and can realize emergency cutoff between the storage tank and the oil inlet and outlet pipelines by itself when a flame is actively detected in a fire state.

Description

technical field [0001] The invention belongs to the technical field of oil and gas storage and transportation, and in particular relates to an active emergency cut-off straight-stroke valve device based on flame detection and a use method thereof. Background technique [0002] When a fire accident occurs in the tank area, in order to avoid further expansion of the accident, the oil inlet and outlet pipelines of the storage tank should be cut off urgently. CN107366767A discloses a fast-response fusible hydraulic relief valve. When the fusible retaining piece is melted at high temperature, the elastic valve stem springs up to realize emergency relief. However, there are certain risks in passive emergency cut-off devices that only rely on the melting of fusible plugs. Only when the flame melts the fusible plugs, the emergency cut-off valve will operate, and at this time, the sealing parts in the actuator are also under the flame. The test is facing the risk of failure. [000...

AI Technical Summary

Problems solved by technology

However, there are certain risks in passive emergency cut-off devices that only rely on the melting of fusible plugs. Only when the flame melts the fusible plugs, the emergency cut-off valve will operate, and at this time, the sealing parts in the actuator are also under the flame. The test, facing the risk of failure

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