A welded joint zinc alloy six-leaf ribbed variable flow channel horizontal valve

Abstract

The invention relates to a matching special valve in a pipeline special for conveying crude oil of an oil field, in particular to a welding head zinc alloy six-leaf connecting rib deformed flow way horizontal valve. The valve comprises a cylindrical shaft, a swing rotation valve element, a welding joint valve body, a fastening screw and an outer end cover. As the improvement, the outer end of an outlet bending pipe and the out end of an inlet bending pipe on the welding head valve body are both connected with valve external connection straight pipes, welding slope openings are formed in the valve connector end faces of the valve external connection straight pipes, a circular welding line is arranged between the welding slope openings and an outer pipeline connector, an annular flow way opening is formed in the plane side of a valve element inlet of a valve element sector cylinder, and a round flow way opening is formed in the plane side of a valve element outlet of the valve element sector cylinder. The annular flow way opening is communicated with the round flow way opening through a deformed flow way, a deformed flow way conical portion contained in the deformed flow way and the valve element sector cylinder are connected through six-leaf connecting ribs, the thickness of the valve inlet zinc alloy hard layer plane and the thickness of the valve outlet zinc alloy hard layer plane range from 0.5 mm to 0.7 mm, and the thickness of the single leaf of the six-leaf connecting ribs is 1 / 21 to 1 / 23 of the diameter of the round flow way opening.

Description

technical field [0001] The invention relates to a matching special valve in a pipeline specially used for transporting crude oil in an oil field, in particular to a zinc alloy six-leaf even-rib variable-channel horizontal valve with welding head without any hindering parts such as springs. Background technique [0002] As we all know, the cost of each maintenance of the oilfield system is staggering, and crude oil contains various corrosive mixtures. During the production process of oilfields, the production fluid of oil wells generally contains water and other corrosive media. The water in crude oil, along with Crude oil vaporizes during the heating process, which increases the gas phase load of the pipeline, causing operation fluctuations of the atmospheric and vacuum devices, and in severe cases, tower flushing accidents. MgCl2 and CaCl2 in crude oil can be hydrolyzed to produce corrosive HCl, and HCl dissolves in water to form hydrochloric acid, which has a strong corros...

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Problems solved by technology

[0002] As we all know, the cost of each maintenance of the oilfield system is staggering, and crude oil contains various corrosive mixtures. During the production process of oilfields, the production fluid of oil wells generally contains water and other corrosive media. The water in crude oil, along with Crude oil vaporizes during heating, which increases the gas phase load of the pipeline, causing fluctuations in the operation of atmospheric and vacuum devices, and in severe cases, tower flushing accidents

MgC12 and CaC12 in crude oil can be hydrolyzed to produce corrosive HCl, and HCl dissolves in water to form hydrochloric acid, which has a strong corrosive effect and causes corrosion of the pipeline system

After the crude oil is produced from the oil well, it is transported outward through the oil pipeline. Any repair or replacement of the oil circuit and the cleaning of the blocked pipeline will cost a lot, and will affect the production of the oil well for a long time.

[0003] One-way valves are indispensable in oilfield system pipelines to complete the entire delivery process. Currently used one-way valves, such as: steel ball type, valve type and gravity type, have the main disadvantages: the internal The spring causes a large resistance loss

The self-priming pump and other supporting one-way valves also have to overcome the gravity resistance in the whole process, resulting in additional energy consumption

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