Pay attention to these seven points!

1. The flushing should be carried out within 2-3 weeks of pipeline pickling, so as not to cause new corrosion in the pipeline and affect the construction quality. Qualified working oil should be injected immediately after the flushing is qualified, and the equipment should be started for circulation every 3 days to prevent pipeline corrosion.

 

2. The circulation flushing shall be carried out continuously, and the operation shall be carried out continuously in three shifts, and shall not be stopped without special reasons

 

3. The flushing sampling should be carried out in the upstream of the return oil filter. During the sampling time and at the beginning of flushing, there are many impurities, which can be taken every 6-8h

 

4. Flush the hydraulic system before installing the sensitive components. The selected cleaning loop should skip the sensitive element, preferably reducing flow resistance. In the cleaning process, the high speed flow of the fluid relative to the pipe wall is used to remove impurities on the pipe wall, so that it is suspended in the fluid and flows forward together with the fluid until it is filtered out by the flushing filter. In the flushing loop, it is necessary to avoid the fluid carrying pollutant particles and impurities flowing through the vertical pipe.

 

5. The flow rate in the pipe should be in the state of high-speed turbulence, if the hydraulic system itself can not meet the power source, external oil supply circuit to obtain large flow. The viscosity of the washing fluid can be reduced by using a special cleaning oil truck to supply oil or by using a low-viscosity washing fluid or heating washing fluid to increase the Reynolds number and make it turbulent.

 

6. The self-made flushing oil tank should be cleaned and sealed as far as possible, with air filtration device, and the oil tank capacity should be greater than 5 times of the hydraulic pump flow. Filter trolley should be used to filter the oil when filling the oil tank.

 

7. Impurities are difficult to clean, so it is necessary to wash by hand after draining oil. Do not wipe with cotton yarn or flammable fiber.

 

There are many restrictions on the time and process of hydraulic system cycle cleaning, so we must pay special attention to these seven points when cleaning.