JP2003024719A - Filter cartridge for liquid filtration - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability, make adjustment of density grade easy, easily form a filtration layer without unevenness, solve uneven collection, prolong the life of a filtration material, and make replacement and assembly of the filtration material easy. SOLUTION: A plurality to ten and some separate filter bodies having liquid passing holes with a size of 10-300 meshs and sandwiching a filtration material in the inside are assembled to be a cylindrical assembly and the assembly is surrounded by a fastening member to obtain a filter cartridge for liquid filtration.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to industrial water, drainage,
The present invention relates to a cylindrical filter cartridge (hereinafter simply referred to as a cartridge) that purifies various liquids such as water and sewage and raw material liquid.

[0002]

2. Description of the Related Art Conventionally, a cartridge has been used as a filter material for various liquid filters in a wide range of industrial fields because it can be easily replaced. Then, there is a cartridge provided with a filter layer having a coarse and dense structure in order to efficiently remove fine and coarse particles of contaminants / suspended substances in the liquid. As this kind of cartridge, several kinds (2-6
A non-woven fabric laminated cartridge is generally used in which spirally wound non-woven fabrics (of about kinds) are heat-bonded.

However, in the case of the conventional non-woven fabric laminated type cartridge, since several kinds of non-woven fabrics are wound, the workability thereof is poor. Moreover, since the coarse and dense structure is determined by the type of nonwoven fabric, it is difficult to adjust the density gradient. Furthermore, several kinds of non-woven fabrics having different areal weights and fiber diameters are required for one product type, and unevenness of the non-woven fabrics or fluctuations in the winding tension easily cause non-uniformity that affects the filtration performance at any position of the filtration layer. There was a tendency for uneven collection to occur and shorten the filter medium life.

[0004]

DISCLOSURE OF THE INVENTION The present invention improves workability, facilitates adjustment of the density gradient, and enables easy formation of a filter layer having no unevenness, and eliminates the unevenness of collection to prolong the life of the filter medium. An object is to make it extendable and to simplify replacement and assembly.

[0005]

In a cartridge according to the present invention, a filter material is sandwiched inside a divided filter body having fine liquid passage holes, and a plurality of dozen or more divided filter bodies are assembled into a cylindrical shape. Formed on the body.

According to this means, the pressing force applied when the aggregate is formed acts centripetally on the filter medium inside the divided filter body, so that the filter medium moves from the outer portion to the inner portion of the aggregate. A uniform filter layer is obtained, which gradually changes from coarse to dense. In addition, the degree of coarseness and fineness of the filtration layer can be easily adjusted by adjusting the applied pressure. Therefore, the coarse particles to the fine particles are sequentially and efficiently collected from the outer portion to the inner portion of the filtration layer, and the entire filtration layer is utilized.

In the present invention, the divided filter body may be a reticulated knitted fabric or a perforated plate.

The diameter (or mesh) of the liquid passage holes of the divided filter body is determined in consideration of the particle size of the filter substance to be collected, but a range of 10 to 300 mesh is preferable. The reason is that if it is less than 10 mesh, particles tend to be clogged, and if it exceeds 300 mesh, it tends to be difficult to capture particles.

The above-mentioned assembly can be easily fixed by compressing it so that the assembly is tightened when a tightening material is attached around the assembly.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. A cartridge A is an assembly 1 in which 6 to 30 divided filter bodies 1a having fine liquid passage holes are formed in a cylindrical shape, and an assembly. The fixing plate 2 is fitted to both ends of the assembly 1, and the tightening material 3 is fitted around the assembly 1. Inside each of the divided filter bodies 1a, a filter layer (not shown) is formed in which the roughness gradually changes from the outer portion to the inner portion and gradually changes from coarse to dense.

As shown in FIG. 2, the divided filter body 1a has a substantially V-shaped cross section and has a required size.
The filter material 1b is a rectangular parallelepiped non-woven fabric having a certain thickness and width, and is sealed so as to be sandwiched.

In this case, as the divided filter body 1a,
A synthetic net or a metal net which is woven and woven in a net shape using a synthetic fiber or a metal fiber is preferable. Instead of these, it is also possible to use a perforated plate such as a so-called punching plate in which fine holes are perforated in a synthetic resin plate or a metal plate that can be narrowly deformed by compression when forming the aggregate.

As the fiber diameter of the synthetic fiber or the metal wire, an ultrafine wire of 10 to 50 m is suitable, and the size of the liquid passage holes (mesh) of the divided filter is in the range of 10 to 300 mesh. Is practical.

Further, the fiber diameter, density, stitch length, etc. of the non-woven fabric used for the filter material 1b are appropriately selected and determined according to the filtering performance. Further, instead of the non-woven fabric, a fiber diameter within a predetermined range,
It is also possible to use a fiber web or cloth having a basis weight.

The tightening material 3 is preferably a thread, a tape-like cloth or a non-woven cloth, and the density gradient can be adjusted by the pressure applied by winding. In addition, by pressing with a metallic band or other means, the density gradient of the filter layer formed inside each divided filter body 1a can be further increased.

Although not shown, the aggregate may be formed into a cylindrical shape by fitting the divided filter into 6 to 30 cartridges having fine liquid passage holes.

[0018]

According to the present invention, it is possible to form an even filter layer inside each of the divided filter bodies, which gradually and coarsely changes from the outer portion to the inner portion. Further, by adjusting the applied pressure, the degree of coarseness and fineness of the filtration layer can be easily adjusted. And, from the coarse particles of the filter substance, the fine particles can be sequentially and efficiently collected due to the gradual coarse and dense structure of the filter layer, the entire filter layer can be utilized, and the life of the filter medium can be extended. . Furthermore, because it is composed of many divided filters,
It can be prepared as a set-up component, and the replacement and assembly of filter media can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a divided filter body used in the present invention.

[Explanation of symbols]

A: Filter cartridge 1 ... Aggregation 1a ... Split filter 1b ... Filter material 2 ... Fixing plate 3 ... tightening material

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01D 29/10 510D 530A

Claims (4)

[Claims] 1. A liquid filter, characterized in that a plurality of divided filter bodies, each having a fine liquid passage hole, in which a filter medium is sandwiched, are formed in a cylindrical aggregate form a plurality of divided filter bodies. Filter cartridge. 2. The filter cartridge for liquid filtration according to claim 1, wherein the divided filter body is a knitted fabric or a perforated plate. 3. The filter cartridge for liquid filtration according to claim 1, wherein the size of the liquid passage hole is 10 to 300 mesh. 4. The filter cartridge for liquid filtration according to claim 1, wherein a tightening material is provided around the assembly.