Remote pressure and flow control system of self-operated regulator

Abstract

The invention relates to a self-operated regulator, in particular relating to a remote pressure and flow control system of a self-operated regulator. The remote pressure and flow control system comprises a flow meter (2), a self-operated regulator (3) with a directing device (18), a flow computer (6), an inlet pressure transmitter (7), an outlet pressure transmitter (8), a gas inlet electromagnetic valve (9), a gas exhaust electromagnetic valve (10) and a controller (12); the flow meter (2) and the flow computer (6) are connected, and the flow computer (6) is connected with the controller (12); the inlet pressure transmitter (7) and the outlet pressure transmitter (8) are connected with the signal input end (13) of the controller (12), and the signal output end (14) of the controller (12) is connected with the gas inlet electromagnetic valve (9) and the gas exhaust electromagnetic valve (10); and the directing device (18) of the self-operated regulator (3) comprises four levels of directing devices. According to the invention, the automatic regulation and remote control of the pressure and flow of gas pipelines are realized.

Description

technical field [0001] The invention relates to a self-operated pressure regulator, in particular to a remote pressure and flow control system for the self-operated pressure regulator. Background technique [0002] The gas transmission and distribution system is similar to the electric power transmission and distribution system. Its transmission and distribution system adopts high-pressure transmission and distribution and low-pressure use. Generally, the maximum pressure of long-distance pipelines can reach 10MPa, while the pressure reaching the gas stoves and water heaters used by users is only 2KPa. Left and right, the gas transmission and distribution system can only meet the requirements of the final use terminal after 3-5 stages of decompression step by step, and the decompression is completed through the pressure regulator, so the pressure regulator is an important component of the gas transmission and distribution system part. There are many types of pressure regula...

AI Technical Summary

Problems solved by technology

There are many types of pressure regulators. The commonly used pressure regulator is a self-operated pressure regulator with a pilot. This self-operated pressure regulator has a pressure-taking port and a driving pressure command port. The pressure regulator is set on the gas transmission pipeline. It is controlled by the gas before and after the gas transmission and distribution system itself to realize pressure regulation. This self-operated pressure regulator has no external control circuit and energy, simple structure and easy to use. , high voltage stabilization accuracy, etc., but there are the following defects: (1) When the pressure setting value needs to be changed, the setting can only be completed through on-site manual operation, and remote control cannot be realized. A large number of manpower and material resources lead to an increase in operating costs. At the same time, due to the influence of human factors, the reliability, accuracy and monitoring of operations are poor, which also brings inconvenience to maintenance and use; (2). This resource is in short supply, sometimes the gas needs to be deployed, and the gas consumption of downstream users needs to be controlled. However, the existing self-operated pressure regulator can only control a fixed outlet pressure, and cannot control the gas consumption of downstream users, that is, the flow rate. , which brings difficulties to the deployment and optimization of gas

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