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1770-CP
发布者:fzjfx0001  发布时间:2019-08-16 20:26:08

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1770-CP


  随着建筑行业的智能化程度越来越高,很多建筑机械已经代替了人工作业,大大的提高了工作效率,降低了人力成本的支出。混凝土输送泵,又称混凝土泵,由泵体和输送管组成,是一种利用压力将混凝土沿管道连续输送的机械,主要应用于房建、桥梁及隧道施工。为了提高输送泵的移动性,一般将泵体装在汽车底盘上,再装备可伸缩或屈折的布料杆,构成输送泵车。目前,主要分为闸板阀混凝土输送泵和S管阀混凝土输送泵。
  设备结构及基本性能
  本项目以山东某设备产商WF型输送泵车为例,其主要部件混凝土输送泵由料斗、泵送系统、液压系统、清洗系统、电气系统、电动机、行走底盘等组成。
  泵送机构由2只主缸水箱、换向装置、2只混凝土缸、2只混凝土活料斗、分配阀(S形阀)、摆臂、2只摆动液压缸和出料口组成。整机性能和液压系统参数分别如表1、表2所示。
 工艺原理
  混凝土活塞分别与主液压缸活塞杆连接,在主液压缸液压油作用下,作往复运动,一缸前进,则另一缸后退;混凝土缸出口与料斗连通,分配阀一端接出料口,另一端能过花键轴与摆臂连接,在摆动液压缸作用下,可以左右摆动。
  泵送混凝土料时,在主液压缸作用下,混凝土活塞可前进或后退。同时在摆动液压缸作用下,分配阀与混凝土缸连通,混凝土缸与料斗连通。这样混凝土活塞后退,便将料斗内的混凝土吸入混凝土缸,混凝土活塞前进,将混凝土缸内混凝土料送入分配阀泵出。
  当混凝土活塞后退至行程终端时,触发水箱中的换向装置,主液压缸换向,同时摆动油缸换向,使分配阀与混凝土缸连通,混凝土缸与料斗连通,这时活塞后退前进依次循环,从而实现连续泵送。
  反泵时,通过反泵操作,使处在吸入行程的混凝土缸与分配阀连通,处在推送行程的混凝土缸与料斗连通,从而将管路中的混凝土抽回料斗。
  泵送系统通过分配阀的转换完成混凝土的吸入与排出动作,因此分配阀是混凝土泵中的关键部件,会直接影响到混凝土泵的性能。
  方案选型
  该设备所需的控制点数为数字量输入12点,数字量输出8点。其中主要的输入输出点为正泵、反泵、远控/近控、主缸进/退、摆缸进/退、高压 /低压、电动机起动/停止、2个接近开关、4个电磁阀、指示灯运行指示。I/O点设置如表3所示。
  由于该设备主要销往海外市场,设备厂商在电控系统选型时主要考虑产品的高可靠性和品牌知名度。前者保证设备稳定运行,最大限度降低售后服务的成本,甚至无需售后服务;后者有助于提升设备整体的品牌,提升在海外市场的竞争力。

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1770-CP

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