High-pressure-difference-resisting multi-grade adjusting device for pipeline

Abstract

The invention provides a high-pressure-difference-resisting multi-grade adjusting device for a pipeline, relating to the field of an adjusting valve for the pipeline. The high-pressure-difference-resisting multi-grade adjusting device comprises a valve rod (3) and a valve body (1), wherein the valve rod is sleeved in the valve body; shaft plugs (31) which are in sealed matching with a valve base are arranged at the lower end of the valve rod; the shaft plugs at least comprise two grades of the shaft plugs; sleeves (5) matched with the shaft plugs are sleeved outside the shaft plugs; decompression sleeves (4) matched with the sleeves are arranged outside the sleeves; the sleeves are provided with throttling holes and through holes; the decompression sleeves are provided with water outlets; the valve rod is sleeved with a compressing sleeve (6); the shape of each grade of the shaft plug is in a circular platform shape; and a plurality of grades of the shaft plugs are matched with the throttling holes of the sleeves to carry out throttling control, so that the multi-grade flow adjustment is realized, the pressure difference ofbetween an inlet and an outlet of the adjusting valve is effectively reduced, the impact and the vibration of fluid ton a valve core are reduced, the flow property is improved, the service life of the adjusting valve is prolonged, the sealing performance is good and the plugging is not easy to cause.

Description

technical field [0001] The invention relates to the field of regulating valves for pipelines, in particular to the improvement of a multistage regulating device for high pressure difference resistance for pipelines. Background technique [0002] Regulating valve, also known as control valve, is widely used in the field of industrial automatic valve process control. It generally forms a fluid intelligent regulating system with controllers and electric actuators. It is widely used in oil production, water injection, chemical industry and other industries, especially by Applied to oil high-pressure water injection pipelines, the controller receives the flow, pressure, temperature and other parameters of the medium through the rod transmitter to control the electric actuator, and the electric actuator drives the multi-stage anti-high pressure difference adjustment device for the pipeline to adjust the pipeline flow. Especially for the improvement of the invention pat...

AI Technical Summary

Problems solved by technology

Especially for the improvement of the invention patent number ZL201120018604.0, the sealing of the regulating valve is still not satisfactory, it is easy to jam, there is vibration and howling phenomenon, the flow characteristics do not match the control characteristics, and the flow cannot be accurately controlled and fine-tuned

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