A 90° elbow with deflector ribs

A technology of elbows and rib plates, applied in the directions of elbows, pipe elements, siphons, etc., can solve the problems of large increase in water flow resistance, and achieve the effect of small resistance loss, reducing resistance loss and improving hydraulic efficiency.

Active Publication Date: 2019-09-06
扬州市勘测设计研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing 90° elbows have strong secondary backflow (Dean vortex). Adding deflectors to the existing 90° elbows can improve the outlet section pressure and flow velocity distribution of the elbows, but the resistance to water flow also increased

Method used

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  • A 90° elbow with deflector ribs
  • A 90° elbow with deflector ribs
  • A 90° elbow with deflector ribs

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the drawings and descriptions of the drawings.

[0043] A 90° elbow with flow guiding ribs, comprising an elbow 1, the elbow 1 includes a pipe inlet 5, an outlet 6, a water inlet straight pipe 7, and a water outlet straight pipe 8, and the pipe inlet 5 is connected to the water inlet straight pipe. Pipe 7, pipe outlet 6 is connected to the water outlet straight pipe 8, the pipe inlet 5 of the elbow 1 is aligned with the center of the water inlet straight pipe 7, and the outlet 6 is aligned with the center of the water outlet straight pipe 8; perpendicular to the center of the elbow 1 Each section of the arc 4 is a circular section, and the diameter of each circular section is equal to the diameter of the circular section of the inlet and outlet of the elbow 1;

[0044] On both sides of the inner wall of the elbow 1, there are flow guide ribs 2 symmetrically arranged. The thickness of the flow guid...

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Abstract

The invention provides a right-angled elbow provided with flow guiding rib plates and belongs to the technical field of fluid engineering. The central arc of the elbow is a circular arc. All sections perpendicular to the central arc are all round sections. The diameter of each round section is equal to the diameter of an inlet and the diameter of an outlet of the elbow. The diameter of the inlet and the outlet of the elbow is D. The flow guiding rib plates are symmetrically distributed on the two sides of the inner wall of the elbow. The thickness of each flow guiding rib plate is 0.005D, and the width of each flow guiding rib plate is 0.07D. The molded line of each flow guiding rib plate and the center line of the elbow are located in the same camber. The distance between one end of each flow guiding rib plate and the inlet of the elbow and the distance between the other end of each flow guiding rib plate and the outlet of the elbow are both 0-0.15D. The end of a water inlet of each flow guiding rib plate is cylindrical. The right-angled elbow provided with the flow guiding rib plates is scientific and simple in structure and reasonable in design, restrains secondary backflow, reduces the resistance loss caused by the secondary backflow by 4%-8% and improves the hydraulic efficiency of the whole pipeline or the whole mechanical equipment system.

Description

technical field [0001] The invention relates to an elbow for pipe turning and connection, in particular to the structure of the elbow which can improve the flow characteristics in the elbow, reduce the resistance loss of the elbow, and improve the flow state at the outlet of the elbow, and belongs to the technical field of fluid engineering. Background technique [0002] Elbows are widely used in industrial, agricultural, municipal and other equipment, such as hydraulic machinery, fluid machinery, oil and gas transportation, and pipeline systems for water supply and drainage. The usual curved pipes are arc curved pipes with equal curvature, and the secondary flow intensity inside them is relatively high, resulting in increased resistance loss. Secondary flow refers to a kind of regular accompanying motion produced when viscous fluid moves in a curve under a certain mainstream velocity and certain geometric boundary conditions. The fluid flows through the corner of the pipe ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L43/00F16L55/04
Inventor 刘超张松杨帆钱军宋希杰徐磊王芃也
Owner 扬州市勘测设计研究院有限公司
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