Design method for elbow used for dredging engineering conveying pipeline and elbow designed by design method

Abstract

The invention discloses a design method for an elbow used for a dredging engineering conveying pipeline and an elbow designed by design method, and belongs to the technical field of dredging engineering equipment. According to the technical scheme adopted by the invention, a cast-steel tube, which is formed by casting a wear-resisting high-chromium cast iron material added with rear-earth elements through a mould, is taken as an elbow inner-layer steel tube, and an elbow tube body, which is of an outer-layer steel tube formed by carrying out processes of dosing, profiling and welding processes on a low-carbon steel plate, coats the outside of the inner-layer steel tube; a wear-resisting high-chromium cast iron reinforcing layer which is integrated with the inner-layer steel tube is arranged on a bending stress part of the inner-layer steel tube; and the reinforcing layer is a curved surface structure which is formed by connecting double curved surfaces. Compared with the prior art, the technical scheme is reliable, thereby meeting the bending requirements of regulating a mud delivery pipeline, and achieving the substantial characteristics and remarkable progress that wear resistance of a metal composite mud delivery pipeline are similar with those of the mud delivery pipeline for ancillary use.

Description

technical field [0001] The invention relates to the technical field of related equipment used in dredging engineering, in particular to an elbow design method for conveying pipelines in dredging engineering and the technical field of the elbow. Background technique [0002] Mechanical dredging projects such as river courses, waterways, harbor basin dredging, harbor shoals, and wharf foundation trenches all require a large number of conveying pipelines to realize conveying, and the elbows used to adjust the direction of conveying pipelines are indispensable in the entire conveying pipeline. Some have been using self-floating mud discharge rubber pipes or ordinary carbon steel elbows, because the self-floating mud discharge rubber pipes will be worn out quickly when transporting solid materials with sharp edges such as rocks, coral reefs, ores, etc. value, it will lead to the shutdown of the entire dredging engineering system, repair or the scrapping of the entire transmission...

AI Technical Summary

Problems solved by technology

However, due to the inherent defects of the self-floating mud discharge rubber pipe itself, there are still the following deficiencies: one is that although the self-floating mud discharge rubber pipe has a certain bending performance, it is used as a mud discharge elbow There are still obvious inherent deficiencies in the function of adjusting the direction of the mud discharge pipeline, especially when it is used in conjunction with the bundled floating metal composite mud discharge pipe; the second is the self-floating mud discharge rubber pipe Through the technical scheme of adding organic adhesive and wear-resistant steel ring to the innermost layer of the rubber hose, the wear resistance of the rubber hose itself can be improved, but the metal composite mud discharge pipe made of wear-resistant high-chromium cast iron with good wear resistance Compared with the self-floating mud discharge rubber pipe or ordinary carbon steel elbow, there is still a considerable gap in product price, product transportation cost, etc., and more importantly, its service life can only reach one-third of the metal composite mud discharge pipe. One, there are serious quality defects in the service life; therefore, how to design and manufacture a new elbow for dredging engineering pipelines on the basis of existing technology, so that it can be used to adjust the direction of the pipeline At the same time, it can achieve the same wear resistance as the metal composite mud discharge pipe, comprehensively improve the use quality, service life and adaptability of the metal mud discharge pipe, reduce the production cost of dredging projects, and improve the economic benefits of the enterprise , this is still a problem to be solved urgently for those skilled in the art

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