1、 Working principle of can body rotation

发动机取力器——传动轴——油泵——马达——减速机——罐体转动

Engine power takeoff - transmission shaft - oil pump - motor - reducer - can body rotation

二、原因分析

2、 Cause analysis

导致搅拌罐停转主要有以下原因：

The shutdown of mixing tank is mainly caused by the following reasons:

1. 发动机故障：发动机无法启动、取力器损坏等原因。

1. Engine failure: the engine cannot be started, the power take-off is damaged, etc.

2. 上装故障：传动轴损坏、油泵故障、液压油过脏或油量不足、马达故障、减速机故障、操纵杆松脱等原因。

2. Mounting failure: transmission shaft damage, oil pump failure, dirty or insufficient hydraulic oil, motor failure, reducer failure, control lever loosening, etc.

三、寻找故障点

3、 Find the fault point

当车辆运送混凝土过程中，发生罐体无法转动故障，应停车进行检查。通过“一听、一看、一动”迅速寻找故障点，“一听”是指从传动轴到减速机各零部件有无发出异响；“一看”是指看液压油箱油位是否过低或管路漏油严重；“一动”是指前后扳动油泵伺服杆，罐体是否正反均无转动。

When the tank fails to rotate during concrete transportation, the vehicle shall be stopped for inspection. Quickly find the fault point by "listening, looking and moving", and "listening" refers to whether all parts from the transmission shaft to the reducer make abnormal noise; "One look" means to check whether the oil level of the hydraulic oil tank is too low or the pipeline leaks seriously; "Movement" refers to pulling the oil pump servo rod back and forth, and whether the tank body does not rotate in both positive and negative directions.

注：应在罐体停止转动后当即联系当地服务人员（附通讯录），告知罐内混凝土标号及预凝时间，服务人员会耐心指导您如何处理，同时请您将车辆开就近服务站。

Note: after the tank stops rotating, immediately contact the local service personnel (with address book) to inform the concrete grade and pre setting time in the tank. The service personnel will patiently guide you how to deal with it. At the same time, please drive the vehicle to the nearest service station.

四、应急措施

4、 Emergency measures

如果不能在混凝土预凝之前将车辆修复，应立即采取应急措施：

If the vehicle cannot be repaired before the concrete is pre set, emergency measures shall be taken immediately:

1. 马达和减速机无故障情况下，连接“应急油管”将混凝土卸出，预防凝灌事故发生。

1. Connect the "emergency oil pipe" to unload the concrete when the motor and reducer have no fault, so as to prevent concreting accident.

2. 马达或减速机发生故障且确定无法在混凝土预凝前使罐体转动，请快速打开人孔盖，如人孔盖不在罐体下方则需要在罐体前锥底部开孔（Φ=1250px，避开原有焊道），与此同时持续向进料口灌入大量清水，冲刷罐内混凝土，直罐体下方无混凝土流出，罐内少量残余混凝土需人工进行清理，清理完毕后进行清洗，将割下部分重新焊接到罐体上（安装人孔盖），并打磨喷漆处理。

2. If the motor or reducer fails and it is determined that the tank cannot rotate before the concrete is pre set, please quickly open the manhole cover. If the manhole cover is not below the tank, you need to open a hole at the bottom of the front cone of the tank（ Φ= 1250px, avoiding the original weld bead), and at the same time, continuously pour a large amount of clean water into the feed inlet to wash the concrete in the tank until no concrete flows out under the tank. A small amount of residual concrete in the tank needs to be cleaned manually. After cleaning, the cut part shall be welded to the tank again (manhole cover shall be installed), and polished and painted.