The piped hydraulic transportation of tube-contained raw material is a new low-carbon and environmental protection technique for transporting materials. The velocity characteristics of the spiral flow in the pipe with different numbers of guide bars installed on the surface of the piped vehicle body during piped hydraulic transportation of tube-contained raw material were studied by the theoretical analysis and model test. In the test, the numbers of guide bars placed on the surface of the piped vehicle body was respectively 3, 4, 5, and 6, and the studied sections were the section of the piped vehicle body and its rear section, and the flow discharge was 40 m³/h. The results showed that as the number of guide bars increased, the axial velocity of the section of the piped vehicle body increased gradually, while the axial velocity of the rear section of the piped vehicle reduced first and then increased. The section circumferential and radial flow velocity of the piped vehicle body and its rear section both increased first and then reduced. When the number of guide bars installed on the surface of the piped vehicle body was 4, the section circumferential flow velocity of the piped vehicle body and its rear section reached the maximum value, and their distributions were relatively uniform. The results offer theoretical basis so that we can optimize the structure of the piped vehicle and further popularize the piped hydraulic transportation technique of tube-contained raw material.

管状原料管道水力输送是一种低碳环保的物料输送新技术。通过理论分析和模型试验，研究了管道水力输送管装原料时，在管道车体表面安装不同数量导杆的管道内螺旋流的速度特性。试验中，管道车体表面放置的导杆数量分别为3、4、5、6根，研究断面为管道车体及其后部断面、流量排放为40m ³ /h。结果表明，随着导杆数量的增加，管道车车身截面的轴向速度逐渐增大，而管道车后部的轴向速度先减小后增大。管道车体及其后段截面周向和径向流速均先增大后减小。当管道车体表面安装导杆数量为4时，管道车体及其后段的截面周向流速达到最大值，且分布较为均匀。研究结果为优化管道车辆结构、进一步推广管状原料管道水力输送技术提供了理论依据。