Bi-metal composite pouring bent pipe used for concrete conveying and manufacturing method

Abstract

The invention relates to the technical field of concrete conveying pipe manufacturing, in particular to a bi-metal composite pouring bent pipe used for concrete conveying and a manufacturing method. The dual-metal bent pipe comprises an inner container with a wear-resisting corrosion-resisting property and a shell welded with the inner container. The wear-resisting corrosion-resisting inner container is poured, the cooled inner container serves as a mold core for pouring of the shell, and high-temperature metal is used for welding the inner and outer dual-metal bent pipe. The bent pipe is simple in structure, separation falling of the inner and outer bent pipe can be thoroughly eradicated, the use failure rate is reduced, the adopted manufacturing method is simple and practical, productiondifficulty is greatly reduced, production efficiency is improved, the inner container is formed through casting of a high-strength wear-resisting corrosion-resisting material, the quality need is achieved under the condition that the whole bent pipe is thinner, the weight of the bent pipe is reduced, finally, the weight of equipment using the bent pipe is reduced, and safety and stability are improved.

Description

technical field [0001] The invention relates to the technical field of concrete conveying pipe manufacture, in particular to a bimetal composite pouring elbow used for concrete conveying and a manufacturing method. Background technique [0002] In recent years, with the vigorous development of the construction industry, the high-pressure concrete delivery pump truck has been continuously updated, and the height and distance of its boom pumping concrete are also increasing. The performance and service life of the elbow part put forward higher requirements. In addition, the high-speed conveying material generates a large centrifugal force when passing through the boom conveying elbow, which intensifies the impact, wear and corrosion of the high-speed material on the outside of the conveying elbow, making it the weakest link in the conveying pipeline. That is, the elbow used to transport concrete requires properties such as wear resistance, high pressure resistance, corrosion ...

AI Technical Summary

Problems solved by technology

In actual use, it often occurs that multi-section liner pipe gap feeding damages the installation and positioning of the liner pipe, causing it to move and reducing the service life of the bend pipe. In addition, the weld between the chuck and the shell is often desoldered, resulting in damage to the bend pipe affect production

[0004] In addition, the existing technology also adopts a double-layer metal casting structure, that is, the inner and outer elbows are cast at the same time, or one of them is cooled to a certain temperature and the other elbow is cast, both of which need to be made with a connected cavity structure The mold has a complex structure and process, and is prone to defects such as slag inclusions and pores in the interlayer metal

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