A delivery pipe and its manufacturing method, pumping machinery including the delivery pipe

Abstract

The invention discloses a conveying pipe and a manufacturing method thereof, and a pumping machine. The disclosed conveying pipe comprises a pipe body, wherein the pipe body comprises at least one layer of pipe body; the pipe body comprises a first area and a second area which are arranged in an extending direction of the pipe body; and the hardness of the first area is larger than that of the second area, and the toughness of the second area is larger than that of the first area. The first area has higher wear resistance so that the conveying pipe also has higher wear resistance; and the second area has higher toughness so that the conveying pipe also has higher toughness; simultaneously, all parts from the inner wall to the outer wall of the pipe body have basically same characteristics so that materials of all parts of the pipe body can be utilized, thus the utilization ratio of the materials of the pipe body is improved and material waste is reduced.

Description

technical field [0001] The invention relates to a conveying technology for conveying materials such as concrete and mud, in particular to a conveying pipe for conveying materials, a pumping machine including the conveying pipe, and a manufacturing method for the conveying pipe. Background technique [0002] At present, when carrying out construction work, concrete pumping machinery is generally used to transport concrete. In the process of conveying concrete, the concrete pump provides appropriate power to make the concrete reach the predetermined place through the conveying pipeline under appropriate pressure, so as to perform concrete pouring or pouring operations at a position far away from the mixing station. Usually, the delivery pipeline is formed by connecting multiple delivery pipes sequentially. [0003] In the process of conveying concrete, on the one hand, the inner wall of the conveying pipe has to withstand the continuous erosion and wear caused by the flow of ...

AI Technical Summary

Problems solved by technology

[0006] Due to the need to balance hardness and toughness, the service life of single-layer quenched and tempered delivery pipe is relatively short

Although the single-layer inner hole quenched delivery pipe and the double-layer composite delivery pipe can meet the requirements for hardness and toughness in actual use, due to the different properties of the inner wall and outer wall of the two delivery pipes, when the concrete wears through the inner wall, The conveying pipe needs to be replaced at a fee; this is easy to cause waste of conveying pipe materials

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