沙石泵在使用过程中，可以通过以下措施降低故障率：

1. 定期检查沙石泵的各个部件，如轴承、密封圈、电机等，及时发现问题并进行维修。

2. 保持沙石泵的清洁，避免灰尘和杂物进入泵体内部。

3. 按照使用说明书正确使用沙石泵，不要超负荷运行。

4. 在使用前检查沙石泵的各项指标是否正常，如电流、电压、转速等。

During the use of sand and gravel pumps, the following measures can be taken to reduce the failure rate:

1. Regularly inspect various components of the sand and gravel pump, such as bearings, sealing rings, motors, etc., and promptly identify and repair problems.

2. Keep the sand and gravel pump clean to prevent dust and debris from entering the pump body.

3. Use the sand and gravel pump correctly according to the user manual and do not overload it.

4. Before use, check whether the various indicators of the sand and gravel pump are normal, such as current, voltage, speed, etc.