Concrete conveying bent tube and manufacturing method thereof

Abstract

The invention provides a concrete conveying bent tube. The concrete conveying bent tube comprises a double-layer tube body, wherein the double-layer tube body comprises a tube outer layer made of low-carbon steel and a tube inner layer made of wear-resisting alloy; the thickness of one side of the outer arc of the tube inner layer is gradually reduced from the middle to the two ends; and the thickness of one side of the inner arc of the tube inner layer is gradually increased from the middle to the two ends. The concrete conveying bent tube comprises the double-layer tube body, and the double-layer tube body comprises the tube outer layer made of low-carbon steel and the tube inner layer made of wear-resisting alloy, wherein the structure of the tube inner layer is designed by combining abrasion and a stress working condition of the concrete conveying bent tube in a construction process, the thickness of one side of the outer arc is gradually reduced from the middle to the two ends, and the thickness of one side of the inner arc is gradually increased from the middle to the two ends, so that a weak link of the structure of the concrete conveying bent tube is reinforced, and therefore, the concrete conveying bent tube disclosed by the invention is more reasonable in design, is resistant to wear and impact, is good in pressure bearing, and the service life of the concrete conveying bent tube is prolonged. The invention also provides a manufacturing method for the concrete conveying bent tube.

Description

technical field [0001] The invention relates to the technical field of concrete conveying pipes, in particular to a concrete conveying elbow and a manufacturing method thereof. Background technique [0002] Concrete is made by mixing stone aggregate, cement, water and other additives according to a certain ratio. Concrete pump trucks and tow pumps in concrete pumping equipment have become important concrete delivery equipment for building high-rise buildings due to their advantages of flexibility, convenience, and high efficiency. Concrete pumping equipment delivers concrete to buildings through concrete delivery pipes high level. [0003] In the process of concrete conveying and pumping, the concrete conveying pipe needs to bear the high pressure and the scour of the concrete. Generally, it is required to ensure that the pipe does not burst when the pressure is maintained at 17 MPa for five minutes. The elbow in the concrete conveying pipe plays a particularly critical ro...

AI Technical Summary

Problems solved by technology

Double-layer hot push elbow, which can meet the safety requirements, but has low wear resistance

The inner wall of low carbon steel is lined with ceramics to ensure safety and wear resistance, but the impact resistance is poor

The low-carbon steel outer pipe is combined with various material inner pipes, and it is difficult to achieve a good balance between wear resistance and impact resistance through the structure and manufacturing process of cement slurry filling.

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