Delivery elbow pipe and production method thereof

Abstract

The invention provides a delivery elbow pipe and a production method thereof. The delivery elbow pipe comprises an outer elbow pipe (3), an inner elbow pipe (2) and a connecting flange, wherein the inner elbow pipe (2) is made of abrasion resisting materials and embedded inside the outer elbow pipe (3), at least one end of the inner elbow pipe (2) extends out of the outer elbow pipe (3) from the end portion of the outer elbow pipe (3), and the connecting flange is sleeved on the outer side of the end portion of the inner elbow pipe (2) and fixedly connected with the inner elbow pipe (2) and / or the outer elbow pipe (3). By means of the delivery elbow pipe, an abrasion resisting material layer integrally formed by the inner elbow pipe is free of seam, so that the delivery elbow pipe is capable of avoiding eddy caused in the position of the seam in the prior art and removing cavitation caused by the eddy accordingly.

Description

technical field [0001] The invention relates to the field of conveying viscous materials such as concrete and mud, and more specifically, to a conveying elbow for viscous materials such as concrete and mud and a manufacturing method thereof. Background technique [0002] The working environment of the conveying elbow for viscous materials such as concrete and mud is extremely harsh, and the pipe wall must withstand the continuous cyclic pressure impact of 10-12MPa. In the prior art, see figure 1 , Usually double-layer elbows are used, which are composed of six parts such as outer elbow 1', inner elbow 2', wear-resistant sleeves 3' and 6', and connecting flanges 4' and 5'. The manufacturing method is as follows: the outer elbow 1' and the inner elbow 2' are separately molded and embedded together, and then the connecting flanges 4' and 5' are respectively welded to the end face of the outer elbow 1'; finally, the wear-resistant sleeve 3' and 6' are respectively embedded in ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there is a seam at the junction of the inner elbow 2' forming the wear-resistant material layer and the wear-resistant sleeves 3' and 6' of the conveying elbow. During the material conveying process, an eddy current will be formed at the seam, causing Cavitation phenomenon, very easy to damage the seam

But in the production process, in order to embed the wear-resistant sleeves 3' and 6', a pressing process is required, which prolongs the manufacturing time and reduces the production efficiency

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