一、 当抽沙泵出口有压力但是压力小于正常值范围

One, when the pump outlet pressure but the pressure is less than the normal range of values

1、抽沙泵长期没有运行，使得叶轮、密封部位粘结，造成电机堵转；开机前应盘动沙泵，确认转动灵活再启动。

1, pumping sand pump has not run for a long time, so that the impeller, sealing parts of the bond, resulting in motor blocking; boot before the disc moving sand pump, confirm the rotation and then start flexible.

2、抽沙泵本身缺陷，盘动时候出现死点，此事时应解体检查沙泵的零部件是否有损坏情况，并及时更换损坏零件。

2, the limitation of the sand pump pumping, plate moving when dead point, the matter should be disintegration of parts of the sand pump check whether there is damage, and timely replacement of damaged parts.

3、电气故障，检查电机及线路有无缺相故障，保护系统有无误动作，保证电力系统频率到正常值后试机。

3, electrical fault, check the motor and the line has no phase fault, the protection system has the correct action, to ensure that the power system frequency to the normal value of the test machine.

二、当没有压力可能为以下情况：

Two, when there is no pressure may be the following:

1、管路泻压，可能为管路的某个部位有泄露造成泻压，从而是系统压力减小；可以关闭吸沙泵出口阀门，检查压力情况。

1, pipeline leak pressure, may be a part of the pipeline leak caused by leakage, from the system pressure decreases; can be shut down the suction pump outlet valve, check the pressure.

2、缺水，管道内水源不足也是压力不足原因之一，多是由于吸沙泵施工环境中有垃圾或杂草淤堵管路进口，此时开机后能听到水泵噪音很大，逐渐关闭出口阀门这种声音会逐渐减小。清理吸沙泵过滤网上的淤堵并提高工况水位。

2, water, pipe water shortage is also the pressure of the causes of the lack of one, mostly because of the sand suction pump construction environment with rubbish or weed clogging the import pipeline. At this time, the boot can hear pump noise is very big, and gradually close the outlet valve of the sound will be gradually reduced. Cleaning up the clogging of the filter net of the suction sand pump and improving the working conditions of the water level.

3、叶轮腐蚀或者叶轮口环磨损；更换沙泵叶轮。

3, impeller corrosion or impeller ring wear; replace sand pump impeller.