A backwash laminated filter

Abstract

The invention discloses a backwash laminated filter. The backwash laminated filter comprises a shell, a valve body, a filter element, a blow-off pipe, a filter element laminated rack and a filter element laminated sleeve, wherein the blow-off pipe is connected with a blow-off valve; a water outlet frame is arranged on the upper end of the filter element laminated rack, a water outlet hole and a concave surface are formed on the water outlet frame, and the concave surface is formed below the water outlet hole; a water inlet frame is arranged on the upper end, which corresponds to the water outlet frame, of the filter element laminated sleeve, a first water inlet hole and a second water inlet hole are formed in the water inlet frame, a sealing ring is arranged between the first water inlet hole and the second water inlet hole, and the sealing ring is surrounded on the outer side of the water inlet frame and is in sealing connection with the inner side wall of the shell; the filter element laminated rack can be inserted into the filter element laminated sleeve in a manner of moving up and down, the filter element is arranged between the filter element laminated rack and the filter element laminated sleeve, and the shell is covered on the periphery of the filter element laminated sleeve. The backwash laminated filter has the advantages of reasonable structure, convenience in use, good effect, reliability and excellent backwash effect, and filter and backwash states can be conveniently switched.

Description

technical field [0001] The invention relates to the technical field of drinking water filtration, in particular to a water purification filter for filtering drinking water, in particular to a backwashing laminated filter. Background technique [0002] The backwashing process of the filter element is to use the reverse impact of the fluid to wash down the particulate pollutants deposited on the surface of the filter element, and discharge the backwashed sewage out of the filter, so that the filter can resume its filtering function. There are many filtering methods for backwashing filters in the prior art, but the general structure is complicated, and the backwashing effect is poor, and it is not suitable for small equipment. Existing backwashing filters usually change the direction of water flow or use pressure to backwash the filter, which will inevitably result in a complicated filter structure and high cost. [0003] For example, the patent number is 200610049964.0, and t...

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Problems solved by technology

[0004] The above-mentioned backwash filter has the following problems: 1. The pressure difference of the medium is used as the driving force of the filter screen movement, and the controllability is poor. Once the pressure difference is not enough, the filter screen cannot be pushed down to realize backwashing; The power comes from the pressure difference of the medium, which has high requirements for manufacturing and tightness; 3. The backwash is not thorough, which is easy to cause secondary pollution; 4. The spring used for a long time will deteriorate the elasticity , leading to the weakening of the seal of the sealing part, affecting the use effect, and the corrosion of the spring will cause secondary pollution

The structure of this patent is simple, but the water inlet is different in the filtering state and the backwashing state, and the backwashing pipeline needs to be set separately, which brings a lot of trouble to the operation

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