2results about How to "Avoid washing out" patented technology

The utility model provides a hydraulic system for preventing motor oil seal from being damaged by flushing, which comprises a hydraulic oil tank, an electric control variable plunger pump assembly and a driving assembly, the hydraulic oil tank is connected with the electric control variable plunger pump assembly through an oil pipe, an oil feeding pipeline of the electric control variable plunger pump assembly is respectively connected with a flushing valve group and a motor, and the flushing valve group is connected with the driving assembly. The motor is connected with the driving assembly and controls the driving assembly to work, the flushing valve set and the oil outlet end of the motor are connected with the oil return pipeline through oil pipes, and the oil return end of the oil return pipeline is connected with the electric control variable plunger pump assembly. According to the utility model, the flushing valve and the motor are independent, so that oil of the flushing valve does not pass through a motor shell and is returned independently; and when the driven working assembly is instantly stopped due to external factors, the internal pressure of the motor shell is not influenced, and the oil seal is not influenced.

This utility model discloses a multi-stage filtration filter element and a water purification device having the same. The filter element includes PP cotton filter media and a filter assembly. The outer side of the PP cotton filter media is the water inlet surface, and the inner side has a water outlet channel. The filter assembly includes multiple annular filter meshes, which are sequentially fitted around the PP cotton filter media along the radial direction of the filter element. The filtration accuracy of the filter meshes is greater than that of the PP cotton filter media, and the filtration accuracy of the multiple filter meshes increases sequentially from the inside to the outside of the filter element. This utility model uses multiple filter meshes on the outer side of the PP cotton filter media, and the filtration accuracy of the multiple filter meshes is different from that of the PP cotton filter media. Thus, the raw water first passes through multiple filter meshes for filtration, and then passes through the PP cotton filter media for filtration. This avoids the PP cotton filter media directly filtering tap water containing a large number of large particles. Furthermore, the PP cotton filter media is supported by multiple filter meshes on its outer side, preventing tap water from damaging the PP cotton filter media, thereby improving the lifespan of the PP cotton filter media.