Flame-detection based emergency cutoff linear motion valve device and application method

Abstract

The invention discloses a flame-detection based emergency cutoff linear motion valve device and an application method and belongs to the technical field of oil and gas storage and transportation. Theflame-detection based emergency cutoff linear motion valve device comprises a linear motion valve, a piston rod, a hydraulic oil cylinder, a piston, an on-off indication rod, a flame detection module,an oil tank and an energy accumulator. The piston divides the hydraulic oil cylinder into an upper part and a lower part, and the hydraulic oil cylinder comprises a first hydraulic cylinder and a second hydraulic cylinder. The on-off indication rod is connected to the upper portion of the piston and can move up and down along with the piston. The flame detection module is mounted on the top of the on-off indication rod. The first hydraulic cylinder is connected with the energy accumulator through a hydraulic oil pipe B. The upper half portion of the interior of the energy accumulator is provided with a high-pressure air bag, and the lower half portion of the interior of the energy accumulator contains high-pressure hydraulic oil. The second hydraulic cylinder is connected with the oil tank through a hydraulic oil pipe C. A solenoid valve is connected with the flame detection module through a signal control line. The flame-detection based emergency cutoff linear motion valve device isapplicable to the linear motion valve and can emergently cut off connection between the storage tank and the oil inlet/outlet pipe when actively detecting flames under 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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