Throttling structure for long-distance pipeline

Abstract

The invention discloses a throttling structure for a long-distance pipeline. The throttling structure comprises a valve body, a movable block and a connector, wherein the connector communicates with the interior of the valve body. The outer diameter of the closed end of the movable block is smaller than the outer diameter of the open end of the movable block, a sliding groove is formed in the inner wall of the middle of the valve body, the open end of the movable block is arranged in the sliding groove in a sliding mode, a hollow flow channel is formed between the closed end of the movable block and the sliding groove, a contact block is arranged on the end face of the closed end of the movable block, a packing ring is arranged at the extension end of the connector, a circular groove matched with the packing ring and a protruding part is formed in the end face of the contact block, the movable block is provided with a gas outlet hole communicating with the flow channel, and a spring is installed between a circular protrusion and the open end of the movable block. When the gas flow is unstable, the movable block is continuously adjusted under the supporting effect of the spring, and therefore the gap between the connector and the contact block can be matched with the flow rate of injected gas, and automatic control over the injected gas can be realized.

Description

technical field [0001] The invention relates to a gas regulating device, in particular to a throttling structure for long-distance pipelines. 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 filling 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 transportation. The term...

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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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