Ecological dredging jet pump

A jet pump, ecological technology, applied in the field of jet pump, to achieve the effect of high mixing efficiency, increase line speed, increase driving pressure and suction capacity

Inactive Publication Date: 2011-06-01
中国船舶重工集团公司第七〇二研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The applicant has carried out improvement research on the problem that the existing dredging device needs other auxiliary devices to wash away the silt, which is easy to cause secondary pollution, and provides an ecological cleaning device The silt jet pump can directly suck mud without using other auxiliary devices to avoid secondary pollution

Method used

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Embodiment Construction

[0023] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] The Coanda effect is also known as the wall attachment or the Coanda effect. It means that the fluid has the tendency to leave the original flow direction and change to flow with the surface of the protruding object. When the fluid is sprayed outward in the direction tangential to the wall of the object or close to the tangential direction, when there is surface friction between the fluid and the surface of the object it flows through, the flow velocity of the fluid will slow down, as long as the curvature of the object surface is not too large, according to Bernoulli's principle in fluid mechanics, the slowing down of the flow velocity will cause the fluid to flow against the solid wall near it.

[0025] The present invention utilizes the above-mentioned Coanda effect of hydrodynamics to spray fluid outward along the direction tange...

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Abstract

The invention discloses an ecological dredging jet pump, which comprises a jet water inlet pipe, a high-pressure distribution cavity and a silt outlet pipe which are connected in turn. Jet water is jetted into the outlet pipe through a primary jet spout and a secondary jet spout in the high-pressure distribution cavity, wherein the primary jet spout directly jets the jet water into the outlet pipe; and the secondary jet spout introduces the jet water into the outlet pipe through a streamline inlet. The ecological dredging jet pump utilizes the hydrodynamics Coanda effect to realize high speedflow, can avoid secondary pollution caused by using rotating components, and can be widely applied to ecological dredging and environment-friendly dredging of river courses, lakes and the like, and absorption of coal dust on the mine bottom of a coal mine.

Description

technical field [0001] The invention belongs to pumps, in particular to a jet pump used for sucking mud when dredging river courses and lakes. Background technique [0002] Existing underwater mud suction devices for dredging rivers and lakes, no matter whether they are cutter suction, rake suction or other forms, mostly rely on the low pressure at the inlet to suck the sludge, and the mud suction capacity and the ability to stir the sludge are limited by the inlet speed . Its maximum inlet velocity is determined by the following formula: [0003] V max = 2 g ( H st + H o ) [0004] where g is the acceleration due to gravity, H st is the pool depth, and H o is the thinning value at the inlet pipe (expressed in the height of the water column). [0005...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04F5/10
Inventor 丁恩宝洪方文张志荣顾振华曹耀初
Owner 中国船舶重工集团公司第七〇二研究所
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