The invention provides a device for reducing the resistance of paste pipeline transportation. The inner cavity pipeline jacket of the device has eight-hole flange inherently. The bolt and nut are used to fix the eight-hole flange. The outer cavity pipeline is located outside the inner cavity pipeline, and the front end of the outer cavity pipeline gradually converges to the inner cavity pipeline and there are gaps in the joint. The back end of the outer cavity pipeline is welded with the eight-hole flange, and the outer cavity pipeline is welded with the inner cavity pipeline. A wedge-shaped injection cavity is formed in the middle of the cavity pipeline, and a vertical injection pipeline is installed on the outer cavity pipeline. The injection pipeline is connected with the injection cavity. In order to solve the problem that the drag reduction device of paste pipeline in the existing technology mainly relies on small hole injection and the uniformity of the injected liquid in the boundary layer can not be guaranteed, the circular injection method is adopted. The lubricant is injected from the injection pipeline into the injection cavity between the outer cavity pipeline and the inner cavity pipeline, and through the gap between the inner cavity pipeline and the outer cavity pipeline, it flows to the inner wall of the inner cavity pipeline to reduce the drag. The effect is better.
【技术实现步骤摘要】
一种减少膏体管道输送阻力的装置及其注液方法
本专利技术涉及一种减少膏体管道输送阻力的装置及其注液方法,属于管道运输领域。
技术介绍
膏体的物理性质特殊,浓度大,黏度大,均质膏体在圆管流动时呈柱塞流结构,与管壁附着力较强,输送过程中阻力较大,一般需要加压使其流动。其输送距离依赖于泵送压力的大小,远距离输送时需要极高的泵送压力,因而限制了其输送距离,增大了工程成本。为了降低膏体输送的沿程阻力,减少管壁摩擦,研究者提出了不同的减阻方法,主要有型体减阻法,通过改变输送管道的形状达到减阻的目的;添加化学药剂来弱化架体中颗粒间的相互作用,从而降低其管流阻力;注入空气减阻;振动减阻等。而针对浓度较高的膏体,一种浓密膏体管道输送边界层干预减阻的方法已提出。现有技术减少膏体管道输送阻力的装置是通过在输送管道外侧加装一套管,在套管对应的输送管道上均匀得布满小孔,通过加压使液体通过小孔注入内部管道壁面处,经过实验发现虽然小孔注液方式能有效降低输送阻力,但是注入液体在边界层的均匀性不能较好得保证,减阻效果不稳定,针对上述问题,本专利技术改进了注液方式,拟采用边界处环状注液方法,使注入液体 ...
【技术保护点】
1.一种减少膏体管道输送阻力的装置,其特征在于,包括螺栓(2)、八孔法兰(3)、螺母(4)、注液管道(5)、内腔管道(7)和外腔管道(8),所述内腔管道(7)外套固有八孔法兰(3),所述螺栓(2)与螺母(4)配合用于固定八孔法兰(3),所述外腔管道(8)位于内腔管道(7)的外周,且外腔管道(8)的前端逐渐向内腔管道(7)并拢并在并拢处留有缝隙,所述外腔管道(8)的后端与八孔法兰(3)焊接,所述外腔管道(8)与内腔管道(7)中间形成剖面为楔形的注液腔,所述外腔管道(8)上垂直安装有注液管道(5),所述注液管道(5)与注液腔连通。
【技术特征摘要】
1.一种减少膏体管道输送阻力的装置,其特征在于,包括螺栓(2)、八孔法兰(3)、螺母(4)、注液管道(5)、内腔管道(7)和外腔管道(8),所述内腔管道(7)外套固有八孔法兰(3),所述螺栓(2)与螺母(4)配合用于固定八孔法兰(3),所述外腔管道(8)位于内腔管道(7)的外周,且外腔管道(8)的前端逐渐向内腔管道(7)并拢并在并拢处留有缝隙,所述外腔管道(8)的后端与八孔法兰(3)焊接,所述外腔管道(8)与内腔管道(7)中间形成剖面为楔形的注液腔,所述外腔管道(8)上垂直安装有注液管道(5),所述注液管道(5)与注液腔连通。2.根据权利要求...
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