水泥自上料搅拌车是由多个部件组成的，比如专用车底盘、上装罐体、液压系统、副车架、换向阀等等，其中换向阀也会偶尔出现故障，比如阀不能换向或换向动作缓慢，气体泄漏，电磁先导阀有故障等等，下面小编就给大家介绍一下这些故障的方法。

The cement self feeding mixer is composed of many parts, such as the chassis of the special vehicle, the upper tank, the hydraulic system, the subframe, the reversing valve, etc. The reversing valve also occasionally fails, such as the valve cannot reverse or the reversing action is slow, gas leakage, and the electromagnetic pilot valve has faults. The following brief section will introduce the solutions to these faults.

1、水泥自上料搅拌车的换向阀不能换向或者换向动作缓慢，一般是因润滑不良、弹簧被卡住或损坏、油污或杂质卡住滑动部分等原因引起的。此时，我们应先检查油雾器的工作是否正常，润滑油的粘度是否合适。必要时，应更换润滑油，清洗换向阀的滑动部分，或更换弹簧和换向阀。

1. The change-over valve of the cement self feeding mixer can not change direction or the reversing action is slow, which is generally caused by poor lubrication, stuck or damaged springs, and stuck sliding parts by oil or impurities. At this time, we should first check whether the operation of the oil atomizer is normal and whether the viscosity of the lubricating oil is appropriate. If necessary, replace the lubricating oil, clean the sliding part of the reversing valve, or replace the spring and reversing valve.

2、水泥自上料搅拌车的换向阀经长时间使用后容易出现阀芯密封圈磨损、阀杆和阀座损伤的现象，导致阀内气体泄漏，阀的动作缓慢或不正常换向等故障。此时，需要更换密封圈、阀杆和阀座，或将换向阀换新。

2. After being used for a long time, the reversing valve of the cement self feeding mixer is prone to wear of the valve core seal ring, damage of the valve stem and valve seat, resulting in gas leakage in the valve, slow action of the valve or abnormal reversing and other failures. At this time, it is necessary to replace the sealing ring, valve rod and valve seat, or replace the reversing valve.

3、若电磁先导阀的进、排气孔被油泥或其他杂物堵塞，封闭不严，活动铁芯被卡死，电路有故障等，均可导致换向阀不能正常换向，对于前三种情况应清洗先导阀及活动铁芯上的油泥和杂质，而电路故障一般又可分为电路故障和电磁线圈故障两类。

3. If the inlet and outlet holes of the solenoid pilot valve are blocked by oil sludge or other impurities, the sealing is not tight, the movable iron core is stuck, and the circuit has faults, etc., the directional valve can not reverse normally. For the first three cases, the oil sludge and impurities on the pilot valve and movable iron core should be cleaned, and the circuit faults can generally be divided into circuit faults and solenoid coil faults.

在检查电路故障之前，要先将换向阀的手动旋钮转动几下，看换向阀在额定的气压下是否正常换向，若能正常换向，则是电路有故障；

Before checking the circuit fault, turn the manual knob of the reversing valve a few times to see whether the reversing valve reverses normally under the rated air pressure. If it can reverse normally, the circuit is faulty;

检查时，可以用仪表测量电磁线圈的电压，看是否达到了额定电压，如果电压过低，应进一步检查控制电路中的电源和相关联的行程开关电路。

During the inspection, the instrument can be used to measure the voltage of the solenoid coil to see whether the rated voltage is reached. If the voltage is too low, further check the power supply in the control circuit and the associated travel switch circuit.

如果在额定电压下换向阀不能正常换向，则应检查电磁圈的接头是否松动或接触不实，检查方法：拔下插头，测量线圈的阻值（一般应在几百欧姆几千欧姆之间），如果阻值太大或太小，说明电磁线圈已损坏，需要更换。

If the reversing valve can not reverse normally under the rated voltage, check whether the connector of the solenoid coil is loose or not in contact. Check method: unplug the plug and measure the resistance of the coil (generally between several hundred ohms and several thousand ohms). If the resistance is too large or too small, the solenoid coil is damaged and needs to be replaced.

本公司是一家拥有多年工程机械研发与销售经验的工程机械企业，不断致力于产品的技术研发。如果您对这类搅拌车有需求或者有什么使用问题，可以随时来我们网站http://www.sdzkjf.cn进行咨询了解！

The company is a construction machinery enterprise with many years of experience in R&D and sales of construction machinery, and is constantly committed to product technology research and development. If you have any demand for this type of mixer or have any use problems, you can come to our website at any time http://www.sdzkjf.cn Ask about it!