Cleaning driver of self-cleaning mechanical type filter

Abstract

The invention discloses a cleaning driver for a self-cleaning mechanical filter, comprising a piston mandril and a piston which are always linked with a sewage absorber along the axial direction, and a backbone pressure chamber, a triggering chamber, a driving chamber and a decompression chamber which are arranged outside a piston chamber in parallel from the interior to the exterior, wherein, the triggering chamber and the driving chamber are sealed and separated by a movable rigid wall liquid, and when the rigid wall receives triggering signals in the triggering chamber, the rigid wall moves towards the driving chamber, thus causing the driving chamber to communicate with the decompression chamber for decompression and causing the piston to drive the sewage absorber to make the axial movement. As the rigid walls adopted by the cleaning driver can bear great pressure, the filter can work under extremely high water pressure of raw water.

Description

technical field [0001] The invention relates to a filter for purifying industrial circulating water, in particular to a cleaning driver of a self-cleaning filter, the driving energy of the cleaning driver is provided by the pressure difference of water in a water processor. Background technique [0002] The structure of the filter for on-line purification treatment of industrial circulating water is generally shown in Figure 1. The raw water is input into the coarse filter chamber 14 from the water inlet 10, and the impurities with large particles in the raw water are intercepted by the coarse filter screen 2, and then enter the fine filter chamber 15. The clean water is discharged from the water outlet 11 after being further filtered by the fine filter 3 . After filtering for a certain period of time, the inner wall of the fine filter screen 3 tends to accumulate a layer of impurities. When the impurities become thicker and thicker, it will affect the normal filtration spee...

AI Technical Summary

Problems solved by technology

The deformation of the trigger chamber is due to the liquid-tight flexible film between it and the drive chamber under the pressure of water pressure, which has the following disadvantages: when there is no differential pressure signal input, the trigger chamber communicates with the atmosphere through the pressure relief hole , the water pressure in it is an atmospheric pressure, and the other side of the flexible membrane is the driving chamber, which communicates with the raw water and has the water pressure of the raw water, and the water pressure of the raw water is very large in some applications, so here The pressure difference on both sides of the flexible film diaphragm is very large, and it is easy to be damaged. It has been proved by tests that when the pressure difference on both sides of the flexible film is greater than 5 atmospheres, the flexible film will be easily damaged

Therefore, the cleaning driver is only suitable for use in the control device of a filter with a lower water pressure, and is not suitable for use when the raw water pressure exceeds 5 standard atmospheres

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