A horizontal one-way valve with aluminum alloy two leaves and ribs for external threaded joints

Abstract

The invention relates to a valve matched with and special for a pipeline special for conveying crude oil from oil fields, in particular to an aluminum alloy horizontal check valve with outer screwed joints and two connecting ribs. The horizontal check valve comprises a cylindrical shaft, a swing valve element, an outer screw joint valve body, a fastening screw and an outer end cover, the outer end of an outlet elbow and the outer end of an inlet elbow of the outer screw joint valve body are respectively provided with one outer screwed joint, and connecting outer threads and outer end sealing planes are arranged at the outer ends of the outer screwed joints. An annular flow channel opening is formed in the side face of a valve element inlet lining plate of a valve element sector cylinder, a round flow channel opening is formed in the side face of a valve element outlet lining plate of the valve element sector cylinder, and the annular flow channel opening is communicated with the round flow channel opening through a deformed flow channel. The deformed flow channel comprises a variable flow channel taper part, and the variable flow channel taper part is connected with the valve element sector cylinder through the two connecting ribs. A valve body inlet plane hard layer and a valve body outlet plane hard layer are both made of aluminum alloy hard anti-corrosive materials, and the thickness of one of the two connecting ribs is 1 / 10 to 1 / 12 of the diameter of the round flow channel 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 an aluminum alloy two-leaf horizontal check valve with an external thread joint 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 corrosive...

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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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