Auxiliary closing device and method for stop valve based on network control

Abstract

The invention relates to an auxiliary shutdown device and method for a cut-off valve based on network control, comprising a controller, a cut-off valve and a pipeline running state detection module; the pipeline running state detection module is used to input detection data to the controller; the controller is used to control the cut-off valve; Simultaneously, it also has a network module capable of communicating with the background control center; the network module communicates with the controller; the network module is used to transmit the detection data and / or pipeline operation status information in the controller to the background control center; the network module It is also used to receive the detection data and / or pipeline operation status information of the auxiliary shut-off device of the adjacent shut-off valve sent from the background control center; Or pipeline operation status information to send a shut-off command to the shut-off valve or to maintain a normal work command. The present invention performs data comprehensive judgment through the network module, thereby accurately judging whether there is a safety problem in the pipeline.

Description

technical field [0001] The invention relates to an auxiliary shut-off device for a cut-off valve, in particular to an auxiliary shut-off device and method for a cut-off valve based on network control. Background technique [0002] In the chemical industry such as natural gas, in order to reduce the economic and life and property losses when the pipeline leaks, it is necessary to install an unattended control unit on the shut-off valve at a key position. The control unit continuously monitors parameters such as air pressure in the pipeline through mechanical or electronic devices, and judges whether there is an abnormal situation that must close the valve according to a preset algorithm. When the preset conditions are met, the control unit must automatically close the valve. [0003] Because the explosion and combustion caused by pipeline leakage may damage the cables and network facilities outside the valve, the control unit on the valve must be able to make independent jud...

AI Technical Summary

Problems solved by technology

[0004] Taking the natural gas industry as an example, in the past 20 years, the traditional unattended control unit has an average of more than a dozen false shutdown operations every year, causing great economic losses

The reason may be a temporary failure of mechanical components or electronic devices caused by severe weather such as lightning, or a temporary abnormal fluid state in the pipeline. However, due to the irreproducibility of false shutdown events, the root cause is still unclear. There is also no clear solution

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