Natural gas flow meter intelligent verification process operation safety control method

Abstract

The invention discloses an operation safety control method for an intelligent verification process of a natural gas flow meter, relates to the field of natural gas metering industry, and aims to solve the problem that a certain risk exists in the process that traditional natural gas is conveyed in a pipeline. A regulating valve for opening and closing a controller is arranged in the pipeline, a plurality of flowmeters for detecting the flow of natural gas in the pipeline are uniformly distributed in the pipeline, a central control module is electrically connected to the flowmeters, the regulating valve is electrically connected to the regulating valve, and a pressure transmitter for collecting the pressure in the pipeline is arranged on each pipeline; the pressure transmitter is electrically connected to the central control module, and a pipeline overspeed protection method, a pipeline overspeed protection method, a flow regulation protection method, a pipeline flat pressure overpressure protection method, an in-and-out station valve interlocking logic protection method and a pipeline in-and-out station pressure difference and gas cut-off prevention protection method are used. The effect of improving the transmission safety of the natural gas in the pipeline is achieved.

Description

technical field [0001] The invention relates to the technical field of the natural gas metering industry, in particular to a method for controlling the operation safety of an intelligent verification process of a natural gas flowmeter. Background technique [0002] At present, the intelligent verification system of natural gas flowmeter is the operation of switching conduction of process flow, conducting verification pipeline, pressure adjustment, flow adjustment, flow state stability during verification process, setting of verification parameters, judgment and processing of verification process results and certificate results, etc. [0003] The intelligent verification system of natural gas flowmeter is mainly composed of data acquisition and processing system, database and DCS station control system. The main function of the DCS station control system is the adjustment of the technological process. The daily flow verification of the flow meter is carried out by the verifi...

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: because the medium and high pressure natural gas measurement and verification process system has high complexity of working conditions, high requirements for flow regulation accuracy, and great difficulty in precise control, it is affected by parameters such as pressure, temperature, and pipe inventory. There is a large "time lag", and because all operations are manual, there are risks such as misoperation, flow exceeding the limit, and flow velocity exceeding the limit during the process

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