Gear motor direct-driven double-control axial-flow mechanical pilot-operated type water hammer pressure release valve

Abstract

The invention belongs to the technical field of water hammer pressure release valves, and particularly relates to a gear motor direct-driven double-control axial-flow mechanical pilot-operated type water hammer pressure release valve. The gear motor direct-driven double-control axial-flow mechanical pilot-operated type water hammer pressure release valve comprises a valve body, a supporting cylinder, a gear motor, a valve rod, a mechanical pilot valve and a hand wheel, wherein the supporting cylinder is fixed on the valve body, a sealing end cover is arranged on the supporting cylinder, and the valve body comprises an inlet and an outlet; the valve rod penetrates through the supporting cylinder, the sealing end cover and the gear motor, a plug is arranged at one end of the valve rod, and the other end of the valve rod is connected with the hand wheel; the plug extends into the valve body, and the axis of the inlet of the valve body is perpendicular to the axis of the valve rod; and an external thread section is arranged at the position, close to the plug, of the valve rod, and the external thread section is meshed with an internal thread arranged on the supporting cylinder. According to the gear motor direct-driven double-control axial-flow mechanical pilot-operated type water hammer pressure release valve, the gear motor is automatically and manually controlled through the mechanical pilot valve to directly drive the valve rod, so that accurate control and automatic adjustment of the caliber of the valve are realized, and then the pressure release valve is high in starting speed, convenient to adjust, higher in safety and reliability and longer in service life.

Description

technical field [0001] The invention belongs to the technical field of water hammer pressure relief valves, in particular to a dual-control axial-flow mechanical pilot water hammer pressure relief valve directly driven by a gear motor. Background technique [0002] In long-distance oil pipelines, unexpected shutdown of pumps or abnormal opening and closing of valves will cause water hammer, which may cause local overpressure in the pipeline and cause pipe burst accidents. In order to ensure the safe operation of long-distance oil pipelines and related equipment, water hammer pressure relief valves are usually used to release water hammer pressure. [0003] When water hammer occurs in the pipeline, the pressure relief valve can quickly open and release the high-pressure medium, so that the pipeline pressure returns to the normal range, so as to achieve the purpose of protecting the pipeline and the equipment in the pipeline. Therefore, the opening speed of the pressure relie...

AI Technical Summary

Problems solved by technology

[0005]1. The main valve cavity is connected with the front and rear pipelines through the pilot valve, and the liquid in the main valve cavity needs to be discharged during operation, which is affected by the structure of the pilot valve and the diameter of the pressure pipe Restriction, the discharge rate of liquid in the main valve cavity is slow, so that the main valve cannot be opened quickly;

[0006]2. The oil needs to flow through the main valve chamber, so the requirements for the liquid medium are relatively high, and a filter needs to be installed, so that the traditional water hammer pressure relief valve only It can be used in long-distance oil product pipelines, which limits its application scenarios;

[0007]3. Due to the existence of the main valve spring, the valve core will flutter during operation, which will aggravate the wear of the valve core and shorten the service life

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