Split type natural gas high-pressure prepayment control device and application thereof

Abstract

The invention discloses a split type natural gas high-pressure prepayment control device and an application thereof. The device mainly consists of a flowmeter, a volume corrector, a prepayment controller and an electric valve, and is capable of completing prepayment and control functions through the controller, wherein the prepayment controller is connected with the volume corrector to carry out data exchange; meanwhile, the controller is provided with an IC card interface to realize gas flow metering and settlement synchronization; the controller is provided with an SIM card interface which is used for uploading data to an upper scheduling center; the controller is connected with the electric valve and is used for controlling the opening and closing of the electric valve according to thegas flow charged by a user and closing the valve when the gas flow of the user is finished; the control device is provided with a circuit protection module; and the circuit protection module is used for detecting the structural connection states of a drive, the valve, the volume corrector and the flowmeter, and alarming for the upper scheduling center when abnormal states occur.

Description

technical field [0001] The invention relates to a natural gas prepayment control device, in particular to a split type prepaid high-pressure natural gas volume metering device, which can complete the functions of high-pressure gas volume measurement, prepayment and automatic valve control. Background technique [0002] City gas companies are responsible for distributing natural gas to various customers in the area under their jurisdiction. There are many end customers, including large and medium-sized industrial and commercial customers, who use high (sub-high) pressure natural gas energy, and high (sub-high) pressure meters for trade settlement. High) pressure measurement. [0003] In this field, the basis for grading gas pipelines is: high-pressure gas pipeline grade A: pressure 2.5<P≤4.0MPa; high-pressure gas pipeline grade B: pressure 1.6<P≤2.5MPa; sub-high pressure gas pipeline grade A: pressure is 0.8<P≤1.6MPa; sub-high pressure gas pipeline grade B: pressure...

AI Technical Summary

Problems solved by technology

[0006] According to the current domestic actual situation, the cut-off valve of the interlock control system is generally a two-position explosion-proof solenoid valve driven by a 24-volt DC power supply. In the case of compressed air source, and due to the limited driving force, the diameter of the pipeline is generally below DN300mm, and the price is expensive

[0007] The Chinese patent application, the application number is 201910073239.4, and the title of the invention is a natural gas high and medium pressure prepayment control system (document 1), which discloses a natural gas high and medium pressure prepayment system. The system is single and has a complex structure. The upstream and downstream of each branch road are equipped with meter front valves and meter rear valves. The cost is high, the precision is low, the installation is cumbersome, there is no encryption system, it is easy to crack, there are potential safety hazards, and the practicability is not high;

[0008] The current natural gas prepaid flowmeter can only achieve low pressure (P<0.01MPa), medium pressure (0.01

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