Check valve for high-pressure gas long-distance pipeline

Abstract

The invention discloses a check valve for a high-pressure gas long-distance pipeline. The check valve comprises a valve body, a movable block and a connector, wherein the connector is communicated with the interior of the valve body; the external diameter of the closed end of the movable block is smaller than that of the open end of the movable block; a chute is formed in the middle inner wall of the valve body; a runner is formed between the closed end of the movable block and the chute in an annular manner; a contact block is arranged on the end surface of the closed end of the movable block; a packing ring is arranged at the extending end of the connector; an annular groove matched with the packing ring is formed in one end surface of the contact block; an air outlet communicated with the rubber is formed in the movable block; a spring is mounted between a ring bulge and the end part of the open end of the movable block. When the gas flow rate is instable, the movable block can be continually adjusted in the way of being supported by the spring to ensure that the size of a gap between the connector and the contact block is matched with the flow rate of injected gas, so that automatic control of the injected gas is realized.

Description

technical field [0001] The invention relates to a gas regulating device, in particular to a one-way valve of a high-pressure gas long-distance pipeline. Background technique [0002] Pipeline gas transmission station is a variety of operation stations established for pipeline transportation of natural gas or petroleum associated gas. According to the location of the compressed gas station along the pipeline, it is divided into a starting gas compressor station, an intermediate gas compressor station and a terminal gas charging station. The starting point compressor station is located near the gas gathering center or processing plant of the gas field, providing pressure energy for natural gas, and performing operations such as gas purification, gas mixing, pressure regulation, gas metering, and pig delivery. The intermediate compressor station is located along the transportation pipeline, mainly to pressurize the natural gas that consumes pressure energy during transportatio...

AI Technical Summary

Problems solved by technology

[0003] The gas pipeline is the extension leg of the pipeline gas transmission station. During the natural gas transmission process, the gas flow in the pipeline is unstable, which will continuously scour the pipeline wall during the long-distance transmission. At the same time, when the injected gas volume is relatively small , the gas in the pipeline on the way of transmission will also appear back channeling and other imaginations, which will lead to the stagnation of gas transmission

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