RU173777U1 - COMBINED FILTER ELEMENT - Google Patents

Abstract

The utility model relates to the field of liquid separation, namely to removable cartridge filters that provide cleaning not only from large and small mechanical impurities, but also from organic impurities and mucus clots, and can be used to clean raw milk. The combined filter element is made in the form of a tubular cartridge containing a denser inner cylindrical frame and a less dense outer filter shell. The frame is formed by discrete rows of fibers from food-grade polymer material obtained by aerodynamic extrusion. The outer filter shell is formed by several layers of different threads. The porosity of the layers increases from the center to the periphery. The utility model allows to expand the functionality of the filter element. 2 ill.

Description

The utility model relates to the field of liquid separation, namely to removable cartridge filters that provide cleaning not only from large and small mechanical impurities, but also from organic impurities and mucus clots, and can be used to clean raw milk.

The prior art filter element, made in the form of a tubular cartridge containing a denser inner cylindrical frame formed by discrete rows of fibers from food-grade polymer material obtained by aerodynamic extrusion, and a less dense outer filter shell (see patent RU 118874, class B01D 27/00, published on 08/10/2012). The technical problem is the impossibility of varying the properties of the filter element, as well as the fact that when cleaning especially contaminated liquids, in particular raw milk, the throughput of the filter element decreases several times and it is necessary to change it very often.

In the proposed combined filter element, made in the form of a tubular cartridge containing a denser inner cylindrical frame formed by discrete rows of fibers from food-grade polymer material obtained by aerodynamic extrusion, and a less dense outer filter shell, said outer filter shell is formed by several layers of different threads and the porosity of the layers increases from the center to the periphery. The combination of the above features allows you to solve the above technical problem and get a technical result, which consists in expanding the functionality of the filter element.

In FIG. 1 is a cross-sectional view of the proposed combined filter element;

in FIG. 2 is a graph of porosity versus filter element diameter.

The proposed combined filter element is a replaceable tubular cartridge inserted into a detachable housing. The cartridge contains a denser inner cylindrical frame 1 and a less dense outer filter shell 2.

The frame 1 is formed by strongly pressed to each other with a rolling mandrel discrete rows of fibers from food-grade polymer material (polypropylene grade 01030) obtained by aerodynamic extrusion. The main advantage of the material used is its resistance to aggressive environments, as well as the ability to stretch threads from 0.01 mm to 0.02 mm thick at a melting point of 195 ° C. The frame 1 provides the strength of the filter and filters out the smallest particles.

The outer filter shell 2 is formed by several layers (in the drawings, three layers 3-5) of various threads wound on a frame 1 and playing the role of a coarse filter. The coarseness of the filter depends on the type of filaments in layers 3-5, their thickness, frequency and thickness of the winding, as well as the frequency of changing the layers of the filament. Threads in layers 3-5 can be single-thread, double-thread, three-thread or more, twisted, braided, etc., from linen, cotton, polypropylene, synthetic material, and may also contain various impregnations, giving them the necessary properties.

The porosity of layers 3-5 increases from the center to the periphery, which makes it possible to stepwise filter milk: larger particles passing through the outer layers are evenly distributed in the filter body, i.e. the shell 2 filters out larger and then smaller particles, which are partially concentrated in the filter layers, while allowing milk fat globules to pass through it. The transitions between layers 3-5 are made smooth, which reduces gaps in the flow of milk and reduces the hydraulic resistance of the filter element. Thus, the maximum filtration efficiency and maximum throughput are achieved, due to which it is possible to use the proposed combined filter element in any conditions.

The proposed filter element is made as follows.

The initial thread of the inner layer 3 is tied to a prefabricated frame 1, and then layers 3-5 with the necessary characteristics are sequentially wound crosswise like a mesh using a winding machine. During winding, the layer thickness, winding density and mesh size are controlled.

The proposed combined filter has adjustable characteristics due to the use of various types of threads in layers 3-5, their thickness, structure, thickness of the wound layers, winding density. In this case, the porosity of the layers increases from the center to the periphery, which makes it possible to use it in any conditions. Thus, the design of the proposed filter element can significantly expand its functionality.

Claims (1)

A combined filter element made in the form of a tubular cartridge containing a denser inner cylindrical frame formed by discrete rows of fibers from food-grade polymer material obtained by aerodynamic extrusion, and a less dense outer filter shell, characterized in that the outer filter shell is formed by several layers of different filaments, and the porosity of the layers increases from the center to the periphery.

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